-/* $OpenBSD: ffs_softdep.c,v 1.152 2023/07/05 15:13:28 beck Exp $ */
-
-/*
- * Copyright 1998, 2000 Marshall Kirk McKusick. All Rights Reserved.
- *
- * The soft updates code is derived from the appendix of a University
- * of Michigan technical report (Gregory R. Ganger and Yale N. Patt,
- * "Soft Updates: A Solution to the Metadata Update Problem in File
- * Systems", CSE-TR-254-95, August 1995).
- *
- * Further information about soft updates can be obtained from:
- *
- * Marshall Kirk McKusick http://www.mckusick.com/softdep/
- * 1614 Oxford Street mckusick@mckusick.com
- * Berkeley, CA 94709-1608 +1-510-843-9542
- * USA
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY MARSHALL KIRK MCKUSICK ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL MARSHALL KIRK MCKUSICK BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * from: @(#)ffs_softdep.c 9.59 (McKusick) 6/21/00
- * $FreeBSD: src/sys/ufs/ffs/ffs_softdep.c,v 1.86 2001/02/04 16:08:18 phk Exp $
- */
-
-#include <sys/param.h>
-#include <sys/buf.h>
-#include <sys/kernel.h>
-#include <sys/malloc.h>
-#include <sys/mount.h>
-#include <sys/proc.h>
-#include <sys/pool.h>
-#include <sys/syslog.h>
-#include <sys/systm.h>
-#include <sys/vnode.h>
-#include <sys/specdev.h>
-#include <crypto/siphash.h>
-#include <ufs/ufs/dir.h>
-#include <ufs/ufs/quota.h>
-#include <ufs/ufs/inode.h>
-#include <ufs/ufs/ufsmount.h>
-#include <ufs/ffs/fs.h>
-#include <ufs/ffs/softdep.h>
-#include <ufs/ffs/ffs_extern.h>
-#include <ufs/ufs/ufs_extern.h>
-
-#define STATIC
-
-/*
- * Mapping of dependency structure types to malloc types.
- */
-#define D_PAGEDEP 0
-#define D_INODEDEP 1
-#define D_NEWBLK 2
-#define D_BMSAFEMAP 3
-#define D_ALLOCDIRECT 4
-#define D_INDIRDEP 5
-#define D_ALLOCINDIR 6
-#define D_FREEFRAG 7
-#define D_FREEBLKS 8
-#define D_FREEFILE 9
-#define D_DIRADD 10
-#define D_MKDIR 11
-#define D_DIRREM 12
-#define D_NEWDIRBLK 13
-#define D_LAST 13
-/*
- * Names of softdep types.
- */
-const char *softdep_typenames[] = {
- "pagedep",
- "inodedep",
- "newblk",
- "bmsafemap",
- "allocdirect",
- "indirdep",
- "allocindir",
- "freefrag",
- "freeblks",
- "freefile",
- "diradd",
- "mkdir",
- "dirrem",
- "newdirblk",
-};
-#define TYPENAME(type) \
- ((unsigned)(type) <= D_LAST ? softdep_typenames[type] : "???")
-/*
- * Finding the current process.
- */
-#define CURPROC curproc
-/*
- * End system adaptation definitions.
- */
-
-/*
- * Internal function prototypes.
- */
-STATIC void softdep_error(char *, int);
-STATIC void drain_output(struct vnode *, int);
-STATIC int getdirtybuf(struct buf *, int);
-STATIC void clear_remove(struct proc *);
-STATIC void clear_inodedeps(struct proc *);
-STATIC int flush_pagedep_deps(struct vnode *, struct mount *,
- struct diraddhd *);
-STATIC int flush_inodedep_deps(struct fs *, ufsino_t);
-STATIC int handle_written_filepage(struct pagedep *, struct buf *);
-STATIC void diradd_inode_written(struct diradd *, struct inodedep *);
-STATIC int handle_written_inodeblock(struct inodedep *, struct buf *);
-STATIC void handle_allocdirect_partdone(struct allocdirect *);
-STATIC void handle_allocindir_partdone(struct allocindir *);
-STATIC void initiate_write_filepage(struct pagedep *, struct buf *);
-STATIC void handle_written_mkdir(struct mkdir *, int);
-STATIC void initiate_write_inodeblock_ufs1(struct inodedep *, struct buf *);
-#ifdef FFS2
-STATIC void initiate_write_inodeblock_ufs2(struct inodedep *, struct buf *);
-#endif
-STATIC void handle_workitem_freefile(struct freefile *);
-STATIC void handle_workitem_remove(struct dirrem *);
-STATIC struct dirrem *newdirrem(struct buf *, struct inode *,
- struct inode *, int, struct dirrem **);
-STATIC void free_diradd(struct diradd *);
-STATIC void free_allocindir(struct allocindir *, struct inodedep *);
-STATIC void free_newdirblk(struct newdirblk *);
-STATIC int indir_trunc(struct inode *, daddr_t, int, daddr_t, long *);
-STATIC void deallocate_dependencies(struct buf *, struct inodedep *);
-STATIC void free_allocdirect(struct allocdirectlst *,
- struct allocdirect *, int);
-STATIC int check_inode_unwritten(struct inodedep *);
-STATIC int free_inodedep(struct inodedep *);
-STATIC void handle_workitem_freeblocks(struct freeblks *);
-STATIC void merge_inode_lists(struct inodedep *);
-STATIC void setup_allocindir_phase2(struct buf *, struct inode *,
- struct allocindir *);
-STATIC struct allocindir *newallocindir(struct inode *, int, daddr_t,
- daddr_t);
-STATIC void handle_workitem_freefrag(struct freefrag *);
-STATIC struct freefrag *newfreefrag(struct inode *, daddr_t, long);
-STATIC void allocdirect_merge(struct allocdirectlst *,
- struct allocdirect *, struct allocdirect *);
-STATIC struct bmsafemap *bmsafemap_lookup(struct buf *);
-STATIC int newblk_lookup(struct fs *, daddr_t, int,
- struct newblk **);
-STATIC int inodedep_lookup(struct fs *, ufsino_t, int, struct inodedep **);
-STATIC int pagedep_lookup(struct inode *, daddr_t, int, struct pagedep **);
-STATIC void pause_timer(void *);
-STATIC int request_cleanup(int, int);
-STATIC int process_worklist_item(struct mount *, int *, int);
-STATIC void add_to_worklist(struct worklist *);
-
-/*
- * Exported softdep operations.
- */
-void softdep_disk_io_initiation(struct buf *);
-void softdep_disk_write_complete(struct buf *);
-void softdep_deallocate_dependencies(struct buf *);
-void softdep_move_dependencies(struct buf *, struct buf *);
-int softdep_count_dependencies(struct buf *bp, int, int);
-
-/*
- * Locking primitives.
- *
- * For a uniprocessor, all we need to do is protect against disk
- * interrupts. For a multiprocessor, this lock would have to be
- * a mutex. A single mutex is used throughout this file, though
- * finer grain locking could be used if contention warranted it.
- *
- * For a multiprocessor, the sleep call would accept a lock and
- * release it after the sleep processing was complete. In a uniprocessor
- * implementation there is no such interlock, so we simple mark
- * the places where it needs to be done with the `interlocked' form
- * of the lock calls. Since the uniprocessor sleep already interlocks
- * the spl, there is nothing that really needs to be done.
- */
-#ifndef /* NOT */ DEBUG
-STATIC struct lockit {
- int lkt_spl;
-} lk = { 0 };
-#define ACQUIRE_LOCK(lk) (lk)->lkt_spl = splbio()
-#define FREE_LOCK(lk) splx((lk)->lkt_spl)
-#define ACQUIRE_LOCK_INTERLOCKED(lk,s) (lk)->lkt_spl = (s)
-#define FREE_LOCK_INTERLOCKED(lk) ((lk)->lkt_spl)
-
-#else /* DEBUG */
-STATIC struct lockit {
- int lkt_spl;
- pid_t lkt_held;
- int lkt_line;
-} lk = { 0, -1 };
-STATIC int lockcnt;
-
-STATIC void acquire_lock(struct lockit *, int);
-STATIC void free_lock(struct lockit *, int);
-STATIC void acquire_lock_interlocked(struct lockit *, int, int);
-STATIC int free_lock_interlocked(struct lockit *, int);
-
-#define ACQUIRE_LOCK(lk) acquire_lock(lk, __LINE__)
-#define FREE_LOCK(lk) free_lock(lk, __LINE__)
-#define ACQUIRE_LOCK_INTERLOCKED(lk,s) acquire_lock_interlocked(lk, (s), __LINE__)
-#define FREE_LOCK_INTERLOCKED(lk) free_lock_interlocked(lk, __LINE__)
-
-STATIC void
-acquire_lock(struct lockit *lk, int line)
-{
- pid_t holder;
- int original_line;
-
- if (lk->lkt_held != -1) {
- holder = lk->lkt_held;
- original_line = lk->lkt_line;
- FREE_LOCK(lk);
- if (holder == CURPROC->p_tid)
- panic("softdep_lock: locking against myself, acquired at line %d, relocked at line %d", original_line, line);
- else
- panic("softdep_lock: lock held by %d, acquired at line %d, relocked at line %d", holder, original_line, line);
- }
- lk->lkt_spl = splbio();
- lk->lkt_held = CURPROC->p_tid;
- lk->lkt_line = line;
- lockcnt++;
-}
-
-STATIC void
-free_lock(struct lockit *lk, int line)
-{
-
- if (lk->lkt_held == -1)
- panic("softdep_unlock: lock not held at line %d", line);
- lk->lkt_held = -1;
- splx(lk->lkt_spl);
-}
-
-STATIC void
-acquire_lock_interlocked(struct lockit *lk, int s, int line)
-{
- pid_t holder;
- int original_line;
-
- if (lk->lkt_held != -1) {
- holder = lk->lkt_held;
- original_line = lk->lkt_line;
- FREE_LOCK_INTERLOCKED(lk);
- if (holder == CURPROC->p_tid)
- panic("softdep_lock: locking against myself, acquired at line %d, relocked at line %d", original_line, line);
- else
- panic("softdep_lock: lock held by %d, acquired at line %d, relocked at line %d", holder, original_line, line);
- }
- lk->lkt_held = CURPROC->p_tid;
- lk->lkt_line = line;
- lk->lkt_spl = s;
- lockcnt++;
-}
-
-STATIC int
-free_lock_interlocked(struct lockit *lk, int line)
-{
-
- if (lk->lkt_held == -1)
- panic("softdep_unlock_interlocked: lock not held at line %d", line);
- lk->lkt_held = -1;
-
- return (lk->lkt_spl);
-}
-#endif /* DEBUG */
-
-/*
- * Place holder for real semaphores.
- */
-struct sema {
- int value;
- pid_t holder;
- char *name;
- int prio;
-};
-STATIC void sema_init(struct sema *, char *, int);
-STATIC int sema_get(struct sema *, struct lockit *);
-STATIC void sema_release(struct sema *);
-
-STATIC void
-sema_init(struct sema *semap, char *name, int prio)
-{
-
- semap->holder = -1;
- semap->value = 0;
- semap->name = name;
- semap->prio = prio;
-}
-
-STATIC int
-sema_get(struct sema *semap, struct lockit *interlock)
-{
- int s;
-
- if (semap->value++ > 0) {
- if (interlock != NULL)
- s = FREE_LOCK_INTERLOCKED(interlock);
- tsleep_nsec(semap, semap->prio, semap->name, INFSLP);
- if (interlock != NULL) {
- ACQUIRE_LOCK_INTERLOCKED(interlock, s);
- FREE_LOCK(interlock);
- }
- return (0);
- }
- semap->holder = CURPROC->p_tid;
- if (interlock != NULL)
- FREE_LOCK(interlock);
- return (1);
-}
-
-STATIC void
-sema_release(struct sema *semap)
-{
-
- if (semap->value <= 0 || semap->holder != CURPROC->p_tid) {
-#ifdef DEBUG
- if (lk.lkt_held != -1)
- FREE_LOCK(&lk);
-#endif
- panic("sema_release: not held");
- }
- if (--semap->value > 0) {
- semap->value = 0;
- wakeup(semap);
- }
- semap->holder = -1;
-}
-
-/*
- * Memory management.
- */
-STATIC struct pool pagedep_pool;
-STATIC struct pool inodedep_pool;
-STATIC struct pool newblk_pool;
-STATIC struct pool bmsafemap_pool;
-STATIC struct pool allocdirect_pool;
-STATIC struct pool indirdep_pool;
-STATIC struct pool allocindir_pool;
-STATIC struct pool freefrag_pool;
-STATIC struct pool freeblks_pool;
-STATIC struct pool freefile_pool;
-STATIC struct pool diradd_pool;
-STATIC struct pool mkdir_pool;
-STATIC struct pool dirrem_pool;
-STATIC struct pool newdirblk_pool;
-
-static __inline void
-softdep_free(struct worklist *item, int type)
-{
-
- switch (type) {
- case D_PAGEDEP:
- pool_put(&pagedep_pool, item);
- break;
-
- case D_INODEDEP:
- pool_put(&inodedep_pool, item);
- break;
-
- case D_BMSAFEMAP:
- pool_put(&bmsafemap_pool, item);
- break;
-
- case D_ALLOCDIRECT:
- pool_put(&allocdirect_pool, item);
- break;
-
- case D_INDIRDEP:
- pool_put(&indirdep_pool, item);
- break;
-
- case D_ALLOCINDIR:
- pool_put(&allocindir_pool, item);
- break;
-
- case D_FREEFRAG:
- pool_put(&freefrag_pool, item);
- break;
-
- case D_FREEBLKS:
- pool_put(&freeblks_pool, item);
- break;
-
- case D_FREEFILE:
- pool_put(&freefile_pool, item);
- break;
-
- case D_DIRADD:
- pool_put(&diradd_pool, item);
- break;
-
- case D_MKDIR:
- pool_put(&mkdir_pool, item);
- break;
-
- case D_DIRREM:
- pool_put(&dirrem_pool, item);
- break;
-
- case D_NEWDIRBLK:
- pool_put(&newdirblk_pool, item);
- break;
-
- default:
-#ifdef DEBUG
- if (lk.lkt_held != -1)
- FREE_LOCK(&lk);
-#endif
- panic("softdep_free: unknown type %d", type);
- }
-}
-
-struct workhead softdep_freequeue;
-
-static __inline void
-softdep_freequeue_add(struct worklist *item)
-{
- int s;
-
- s = splbio();
- LIST_INSERT_HEAD(&softdep_freequeue, item, wk_list);
- splx(s);
-}
-
-static __inline void
-softdep_freequeue_process(void)
-{
- struct worklist *wk;
-
- splassert(IPL_BIO);
-
- while ((wk = LIST_FIRST(&softdep_freequeue)) != NULL) {
- LIST_REMOVE(wk, wk_list);
- FREE_LOCK(&lk);
- softdep_free(wk, wk->wk_type);
- ACQUIRE_LOCK(&lk);
- }
-}
-
-/*
- * Worklist queue management.
- * These routines require that the lock be held.
- */
-#ifndef /* NOT */ DEBUG
-#define WORKLIST_INSERT(head, item) do { \
- (item)->wk_state |= ONWORKLIST; \
- LIST_INSERT_HEAD(head, item, wk_list); \
-} while (0)
-#define WORKLIST_REMOVE(item) do { \
- (item)->wk_state &= ~ONWORKLIST; \
- LIST_REMOVE(item, wk_list); \
-} while (0)
-#define WORKITEM_FREE(item, type) softdep_freequeue_add((struct worklist *)item)
-
-#else /* DEBUG */
-STATIC void worklist_insert(struct workhead *, struct worklist *);
-STATIC void worklist_remove(struct worklist *);
-STATIC void workitem_free(struct worklist *);
-
-#define WORKLIST_INSERT(head, item) worklist_insert(head, item)
-#define WORKLIST_REMOVE(item) worklist_remove(item)
-#define WORKITEM_FREE(item, type) workitem_free((struct worklist *)item)
-
-STATIC void
-worklist_insert(struct workhead *head, struct worklist *item)
-{
-
- if (lk.lkt_held == -1)
- panic("worklist_insert: lock not held");
- if (item->wk_state & ONWORKLIST) {
- FREE_LOCK(&lk);
- panic("worklist_insert: already on list");
- }
- item->wk_state |= ONWORKLIST;
- LIST_INSERT_HEAD(head, item, wk_list);
-}
-
-STATIC void
-worklist_remove(struct worklist *item)
-{
-
- if (lk.lkt_held == -1)
- panic("worklist_remove: lock not held");
- if ((item->wk_state & ONWORKLIST) == 0) {
- FREE_LOCK(&lk);
- panic("worklist_remove: not on list");
- }
- item->wk_state &= ~ONWORKLIST;
- LIST_REMOVE(item, wk_list);
-}
-
-STATIC void
-workitem_free(struct worklist *item)
-{
-
- if (item->wk_state & ONWORKLIST) {
- if (lk.lkt_held != -1)
- FREE_LOCK(&lk);
- panic("workitem_free: still on list");
- }
- softdep_freequeue_add(item);
-}
-#endif /* DEBUG */
-
-/*
- * Workitem queue management
- */
-STATIC struct workhead softdep_workitem_pending;
-STATIC struct worklist *worklist_tail;
-STATIC int num_on_worklist; /* number of worklist items to be processed */
-STATIC int softdep_worklist_busy; /* 1 => trying to do unmount */
-STATIC int softdep_worklist_req; /* serialized waiters */
-STATIC int max_softdeps; /* maximum number of structs before slowdown */
-STATIC int tickdelay = 2; /* number of ticks to pause during slowdown */
-STATIC int proc_waiting; /* tracks whether we have a timeout posted */
-STATIC int *stat_countp; /* statistic to count in proc_waiting timeout */
-STATIC struct timeout proc_waiting_timeout;
-STATIC struct proc *filesys_syncer; /* proc of filesystem syncer process */
-STATIC int req_clear_inodedeps; /* syncer process flush some inodedeps */
-#define FLUSH_INODES 1
-STATIC int req_clear_remove; /* syncer process flush some freeblks */
-#define FLUSH_REMOVE 2
-/*
- * runtime statistics
- */
-STATIC int stat_worklist_push; /* number of worklist cleanups */
-STATIC int stat_blk_limit_push; /* number of times block limit neared */
-STATIC int stat_ino_limit_push; /* number of times inode limit neared */
-STATIC int stat_blk_limit_hit; /* number of times block slowdown imposed */
-STATIC int stat_ino_limit_hit; /* number of times inode slowdown imposed */
-STATIC int stat_sync_limit_hit; /* number of synchronous slowdowns imposed */
-STATIC int stat_indir_blk_ptrs; /* bufs redirtied as indir ptrs not written */
-STATIC int stat_inode_bitmap; /* bufs redirtied as inode bitmap not written */
-STATIC int stat_direct_blk_ptrs;/* bufs redirtied as direct ptrs not written */
-STATIC int stat_dir_entry; /* bufs redirtied as dir entry cannot write */
-
-/*
- * Add an item to the end of the work queue.
- * This routine requires that the lock be held.
- * This is the only routine that adds items to the list.
- * The following routine is the only one that removes items
- * and does so in order from first to last.
- */
-STATIC void
-add_to_worklist(struct worklist *wk)
-{
-
- if (wk->wk_state & ONWORKLIST) {
-#ifdef DEBUG
- if (lk.lkt_held != -1)
- FREE_LOCK(&lk);
-#endif
- panic("add_to_worklist: already on list");
- }
- wk->wk_state |= ONWORKLIST;
- if (LIST_FIRST(&softdep_workitem_pending) == NULL)
- LIST_INSERT_HEAD(&softdep_workitem_pending, wk, wk_list);
- else
- LIST_INSERT_AFTER(worklist_tail, wk, wk_list);
- worklist_tail = wk;
- num_on_worklist += 1;
-}
-
-/*
- * Process that runs once per second to handle items in the background queue.
- *
- * Note that we ensure that everything is done in the order in which they
- * appear in the queue. The code below depends on this property to ensure
- * that blocks of a file are freed before the inode itself is freed. This
- * ordering ensures that no new <vfsid, inum, lbn> triples will be generated
- * until all the old ones have been purged from the dependency lists.
- */
-int
-softdep_process_worklist(struct mount *matchmnt)
-{
- struct proc *p = CURPROC;
- int matchcnt, loopcount;
- struct timeval starttime;
-
- /*
- * First process any items on the delayed-free queue.
- */
- ACQUIRE_LOCK(&lk);
- softdep_freequeue_process();
- FREE_LOCK(&lk);
-
- /*
- * Record the process identifier of our caller so that we can give
- * this process preferential treatment in request_cleanup below.
- * We can't do this in softdep_initialize, because the syncer doesn't
- * have to run then.
- * NOTE! This function _could_ be called with a curproc != syncerproc.
- */
- filesys_syncer = syncerproc;
- matchcnt = 0;
-
- /*
- * There is no danger of having multiple processes run this
- * code, but we have to single-thread it when softdep_flushfiles()
- * is in operation to get an accurate count of the number of items
- * related to its mount point that are in the list.
- */
- if (matchmnt == NULL) {
- if (softdep_worklist_busy < 0)
- return(-1);
- softdep_worklist_busy += 1;
- }
-
- /*
- * If requested, try removing inode or removal dependencies.
- */
- if (req_clear_inodedeps) {
- clear_inodedeps(p);
- req_clear_inodedeps -= 1;
- wakeup_one(&proc_waiting);
- }
- if (req_clear_remove) {
- clear_remove(p);
- req_clear_remove -= 1;
- wakeup_one(&proc_waiting);
- }
- loopcount = 1;
- getmicrouptime(&starttime);
- while (num_on_worklist > 0) {
- if (process_worklist_item(matchmnt, &matchcnt, LK_NOWAIT) == 0)
- break;
-
- /*
- * If a umount operation wants to run the worklist
- * accurately, abort.
- */
- if (softdep_worklist_req && matchmnt == NULL) {
- matchcnt = -1;
- break;
- }
-
- /*
- * If requested, try removing inode or removal dependencies.
- */
- if (req_clear_inodedeps) {
- clear_inodedeps(p);
- req_clear_inodedeps -= 1;
- wakeup_one(&proc_waiting);
- }
- if (req_clear_remove) {
- clear_remove(p);
- req_clear_remove -= 1;
- wakeup_one(&proc_waiting);
- }
- /*
- * We do not generally want to stop for buffer space, but if
- * we are really being a buffer hog, we will stop and wait.
- */
-#if 0
- if (loopcount++ % 128 == 0)
- bwillwrite();
-#endif
- /*
- * Never allow processing to run for more than one
- * second. Otherwise the other syncer tasks may get
- * excessively backlogged.
- */
- {
- struct timeval diff;
- struct timeval tv;
-
- getmicrouptime(&tv);
- timersub(&tv, &starttime, &diff);
- if (diff.tv_sec != 0 && matchmnt == NULL) {
- matchcnt = -1;
- break;
- }
- }
-
- /*
- * Process any new items on the delayed-free queue.
- */
- ACQUIRE_LOCK(&lk);
- softdep_freequeue_process();
- FREE_LOCK(&lk);
- }
- if (matchmnt == NULL) {
- softdep_worklist_busy -= 1;
- if (softdep_worklist_req && softdep_worklist_busy == 0)
- wakeup(&softdep_worklist_req);
- }
- return (matchcnt);
-}
-
-/*
- * Process one item on the worklist.
- */
-STATIC int
-process_worklist_item(struct mount *matchmnt, int *matchcnt, int flags)
-{
- struct worklist *wk, *wkend;
- struct dirrem *dirrem;
- struct mount *mp;
- struct vnode *vp;
-
- ACQUIRE_LOCK(&lk);
- /*
- * Normally we just process each item on the worklist in order.
- * However, if we are in a situation where we cannot lock any
- * inodes, we have to skip over any dirrem requests whose
- * vnodes are resident and locked.
- */
- LIST_FOREACH(wk, &softdep_workitem_pending, wk_list) {
- if ((flags & LK_NOWAIT) == 0 || wk->wk_type != D_DIRREM)
- break;
- dirrem = WK_DIRREM(wk);
- vp = ufs_ihashlookup(VFSTOUFS(dirrem->dm_mnt)->um_dev,
- dirrem->dm_oldinum);
- if (vp == NULL || !VOP_ISLOCKED(vp))
- break;
- }
- if (wk == NULL) {
- FREE_LOCK(&lk);
- return (0);
- }
- /*
- * Remove the item to be processed. If we are removing the last
- * item on the list, we need to recalculate the tail pointer.
- * As this happens rarely and usually when the list is short,
- * we just run down the list to find it rather than tracking it
- * in the above loop.
- */
- WORKLIST_REMOVE(wk);
- if (wk == worklist_tail) {
- LIST_FOREACH(wkend, &softdep_workitem_pending, wk_list)
- if (LIST_NEXT(wkend, wk_list) == NULL)
- break;
- worklist_tail = wkend;
- }
- num_on_worklist -= 1;
- FREE_LOCK(&lk);
- switch (wk->wk_type) {
-
- case D_DIRREM:
- /* removal of a directory entry */
- mp = WK_DIRREM(wk)->dm_mnt;
-#if 0
- if (vn_write_suspend_wait(NULL, mp, V_NOWAIT))
- panic("%s: dirrem on suspended filesystem",
- "process_worklist_item");
-#endif
- if (matchmnt != NULL && mp == matchmnt)
- *matchcnt += 1;
- handle_workitem_remove(WK_DIRREM(wk));
- break;
-
- case D_FREEBLKS:
- /* releasing blocks and/or fragments from a file */
- mp = WK_FREEBLKS(wk)->fb_mnt;
-#if 0
- if (vn_write_suspend_wait(NULL, mp, V_NOWAIT))
- panic("%s: freeblks on suspended filesystem",
- "process_worklist_item");
-#endif
- if (matchmnt != NULL && mp == matchmnt)
- *matchcnt += 1;
- handle_workitem_freeblocks(WK_FREEBLKS(wk));
- break;
-
- case D_FREEFRAG:
- /* releasing a fragment when replaced as a file grows */
- mp = WK_FREEFRAG(wk)->ff_mnt;
-#if 0
- if (vn_write_suspend_wait(NULL, mp, V_NOWAIT))
- panic("%s: freefrag on suspended filesystem",
- "process_worklist_item");
-#endif
- if (matchmnt != NULL && mp == matchmnt)
- *matchcnt += 1;
- handle_workitem_freefrag(WK_FREEFRAG(wk));
- break;
-
- case D_FREEFILE:
- /* releasing an inode when its link count drops to 0 */
- mp = WK_FREEFILE(wk)->fx_mnt;
-#if 0
- if (vn_write_suspend_wait(NULL, mp, V_NOWAIT))
- panic("%s: freefile on suspended filesystem",
- "process_worklist_item");
-#endif
- if (matchmnt != NULL && mp == matchmnt)
- *matchcnt += 1;
- handle_workitem_freefile(WK_FREEFILE(wk));
- break;
-
- default:
- panic("%s_process_worklist: Unknown type %s",
- "softdep", TYPENAME(wk->wk_type));
- /* NOTREACHED */
- }
- return (1);
-}
-
-/*
- * Move dependencies from one buffer to another.
- */
-void
-softdep_move_dependencies(struct buf *oldbp, struct buf *newbp)
-{
- struct worklist *wk, *wktail;
-
- if (LIST_FIRST(&newbp->b_dep) != NULL)
- panic("softdep_move_dependencies: need merge code");
- wktail = NULL;
- ACQUIRE_LOCK(&lk);
- while ((wk = LIST_FIRST(&oldbp->b_dep)) != NULL) {
- LIST_REMOVE(wk, wk_list);
- if (wktail == NULL)
- LIST_INSERT_HEAD(&newbp->b_dep, wk, wk_list);
- else
- LIST_INSERT_AFTER(wktail, wk, wk_list);
- wktail = wk;
- }
- FREE_LOCK(&lk);
-}
-
-/*
- * Purge the work list of all items associated with a particular mount point.
- */
-int
-softdep_flushworklist(struct mount *oldmnt, int *countp, struct proc *p)
-{
- struct vnode *devvp;
- int count, error = 0;
-
- /*
- * Await our turn to clear out the queue, then serialize access.
- */
- while (softdep_worklist_busy) {
- softdep_worklist_req += 1;
- tsleep_nsec(&softdep_worklist_req, PRIBIO, "softflush", INFSLP);
- softdep_worklist_req -= 1;
- }
- softdep_worklist_busy = -1;
- /*
- * Alternately flush the block device associated with the mount
- * point and process any dependencies that the flushing
- * creates. We continue until no more worklist dependencies
- * are found.
- */
- *countp = 0;
- devvp = VFSTOUFS(oldmnt)->um_devvp;
- while ((count = softdep_process_worklist(oldmnt)) > 0) {
- *countp += count;
- vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
- error = VOP_FSYNC(devvp, p->p_ucred, MNT_WAIT, p);
- VOP_UNLOCK(devvp);
- if (error)
- break;
- }
- softdep_worklist_busy = 0;
- if (softdep_worklist_req)
- wakeup(&softdep_worklist_req);
- return (error);
-}
-
-/*
- * Flush all vnodes and worklist items associated with a specified mount point.
- */
-int
-softdep_flushfiles(struct mount *oldmnt, int flags, struct proc *p)
-{
- int error, count, loopcnt;
-
- /*
- * Alternately flush the vnodes associated with the mount
- * point and process any dependencies that the flushing
- * creates. In theory, this loop can happen at most twice,
- * but we give it a few extra just to be sure.
- */
- for (loopcnt = 10; loopcnt > 0; loopcnt--) {
- /*
- * Do another flush in case any vnodes were brought in
- * as part of the cleanup operations.
- */
- if ((error = ffs_flushfiles(oldmnt, flags, p)) != 0)
- break;
- if ((error = softdep_flushworklist(oldmnt, &count, p)) != 0 ||
- count == 0)
- break;
- }
- /*
- * If the reboot process sleeps during the loop, the update
- * process may call softdep_process_worklist() and create
- * new dirty vnodes at the mount point. Call ffs_flushfiles()
- * again after the loop has flushed all soft dependencies.
- */
- if (error == 0)
- error = ffs_flushfiles(oldmnt, flags, p);
- /*
- * If we are unmounting then it is an error to fail. If we
- * are simply trying to downgrade to read-only, then filesystem
- * activity can keep us busy forever, so we just fail with EBUSY.
- */
- if (loopcnt == 0) {
- error = EBUSY;
- }
- return (error);
-}
-
-/*
- * Structure hashing.
- *
- * There are three types of structures that can be looked up:
- * 1) pagedep structures identified by mount point, inode number,
- * and logical block.
- * 2) inodedep structures identified by mount point and inode number.
- * 3) newblk structures identified by mount point and
- * physical block number.
- *
- * The "pagedep" and "inodedep" dependency structures are hashed
- * separately from the file blocks and inodes to which they correspond.
- * This separation helps when the in-memory copy of an inode or
- * file block must be replaced. It also obviates the need to access
- * an inode or file page when simply updating (or de-allocating)
- * dependency structures. Lookup of newblk structures is needed to
- * find newly allocated blocks when trying to associate them with
- * their allocdirect or allocindir structure.
- *
- * The lookup routines optionally create and hash a new instance when
- * an existing entry is not found.
- */
-#define DEPALLOC 0x0001 /* allocate structure if lookup fails */
-#define NODELAY 0x0002 /* cannot do background work */
-
-SIPHASH_KEY softdep_hashkey;
-
-/*
- * Structures and routines associated with pagedep caching.
- */
-LIST_HEAD(pagedep_hashhead, pagedep) *pagedep_hashtbl;
-u_long pagedep_hash; /* size of hash table - 1 */
-STATIC struct sema pagedep_in_progress;
-
-/*
- * Look up a pagedep. Return 1 if found, 0 if not found or found
- * when asked to allocate but not associated with any buffer.
- * If not found, allocate if DEPALLOC flag is passed.
- * Found or allocated entry is returned in pagedeppp.
- * This routine must be called with splbio interrupts blocked.
- */
-STATIC int
-pagedep_lookup(struct inode *ip, daddr_t lbn, int flags,
- struct pagedep **pagedeppp)
-{
- SIPHASH_CTX ctx;
- struct pagedep *pagedep;
- struct pagedep_hashhead *pagedephd;
- struct mount *mp;
- int i;
-
- splassert(IPL_BIO);
-
-#ifdef DEBUG
- if (lk.lkt_held == -1)
- panic("pagedep_lookup: lock not held");
-#endif
- mp = ITOV(ip)->v_mount;
-
- SipHash24_Init(&ctx, &softdep_hashkey);
- SipHash24_Update(&ctx, &mp, sizeof(mp));
- SipHash24_Update(&ctx, &ip->i_number, sizeof(ip->i_number));
- SipHash24_Update(&ctx, &lbn, sizeof(lbn));
- pagedephd = &pagedep_hashtbl[SipHash24_End(&ctx) & pagedep_hash];
-top:
- LIST_FOREACH(pagedep, pagedephd, pd_hash)
- if (ip->i_number == pagedep->pd_ino &&
- lbn == pagedep->pd_lbn &&
- mp == pagedep->pd_mnt)
- break;
- if (pagedep) {
- *pagedeppp = pagedep;
- if ((flags & DEPALLOC) != 0 &&
- (pagedep->pd_state & ONWORKLIST) == 0)
- return (0);
- return (1);
- }
- if ((flags & DEPALLOC) == 0) {
- *pagedeppp = NULL;
- return (0);
- }
- if (sema_get(&pagedep_in_progress, &lk) == 0) {
- ACQUIRE_LOCK(&lk);
- goto top;
- }
- pagedep = pool_get(&pagedep_pool, PR_WAITOK | PR_ZERO);
- pagedep->pd_list.wk_type = D_PAGEDEP;
- pagedep->pd_mnt = mp;
- pagedep->pd_ino = ip->i_number;
- pagedep->pd_lbn = lbn;
- LIST_INIT(&pagedep->pd_dirremhd);
- LIST_INIT(&pagedep->pd_pendinghd);
- for (i = 0; i < DAHASHSZ; i++)
- LIST_INIT(&pagedep->pd_diraddhd[i]);
- ACQUIRE_LOCK(&lk);
- LIST_INSERT_HEAD(pagedephd, pagedep, pd_hash);
- sema_release(&pagedep_in_progress);
- *pagedeppp = pagedep;
- return (0);
-}
-
-/*
- * Structures and routines associated with inodedep caching.
- */
-LIST_HEAD(inodedep_hashhead, inodedep) *inodedep_hashtbl;
-STATIC u_long inodedep_hash; /* size of hash table - 1 */
-STATIC long num_inodedep; /* number of inodedep allocated */
-STATIC struct sema inodedep_in_progress;
-
-/*
- * Look up a inodedep. Return 1 if found, 0 if not found.
- * If not found, allocate if DEPALLOC flag is passed.
- * Found or allocated entry is returned in inodedeppp.
- * This routine must be called with splbio interrupts blocked.
- */
-STATIC int
-inodedep_lookup(struct fs *fs, ufsino_t inum, int flags,
- struct inodedep **inodedeppp)
-{
- SIPHASH_CTX ctx;
- struct inodedep *inodedep;
- struct inodedep_hashhead *inodedephd;
- int firsttry;
-
- splassert(IPL_BIO);
-
-#ifdef DEBUG
- if (lk.lkt_held == -1)
- panic("inodedep_lookup: lock not held");
-#endif
- firsttry = 1;
- SipHash24_Init(&ctx, &softdep_hashkey);
- SipHash24_Update(&ctx, &fs, sizeof(fs));
- SipHash24_Update(&ctx, &inum, sizeof(inum));
- inodedephd = &inodedep_hashtbl[SipHash24_End(&ctx) & inodedep_hash];
-top:
- LIST_FOREACH(inodedep, inodedephd, id_hash)
- if (inum == inodedep->id_ino && fs == inodedep->id_fs)
- break;
- if (inodedep) {
- *inodedeppp = inodedep;
- return (1);
- }
- if ((flags & DEPALLOC) == 0) {
- *inodedeppp = NULL;
- return (0);
- }
- /*
- * If we are over our limit, try to improve the situation.
- */
- if (num_inodedep > max_softdeps && firsttry && (flags & NODELAY) == 0 &&
- request_cleanup(FLUSH_INODES, 1)) {
- firsttry = 0;
- goto top;
- }
- if (sema_get(&inodedep_in_progress, &lk) == 0) {
- ACQUIRE_LOCK(&lk);
- goto top;
- }
- num_inodedep += 1;
- inodedep = pool_get(&inodedep_pool, PR_WAITOK);
- inodedep->id_list.wk_type = D_INODEDEP;
- inodedep->id_fs = fs;
- inodedep->id_ino = inum;
- inodedep->id_state = ALLCOMPLETE;
- inodedep->id_nlinkdelta = 0;
- inodedep->id_savedino1 = NULL;
- inodedep->id_savedsize = -1;
- inodedep->id_buf = NULL;
- LIST_INIT(&inodedep->id_pendinghd);
- LIST_INIT(&inodedep->id_inowait);
- LIST_INIT(&inodedep->id_bufwait);
- TAILQ_INIT(&inodedep->id_inoupdt);
- TAILQ_INIT(&inodedep->id_newinoupdt);
- ACQUIRE_LOCK(&lk);
- LIST_INSERT_HEAD(inodedephd, inodedep, id_hash);
- sema_release(&inodedep_in_progress);
- *inodedeppp = inodedep;
- return (0);
-}
-
-/*
- * Structures and routines associated with newblk caching.
- */
-LIST_HEAD(newblk_hashhead, newblk) *newblk_hashtbl;
-u_long newblk_hash; /* size of hash table - 1 */
-STATIC struct sema newblk_in_progress;
-
-/*
- * Look up a newblk. Return 1 if found, 0 if not found.
- * If not found, allocate if DEPALLOC flag is passed.
- * Found or allocated entry is returned in newblkpp.
- */
-STATIC int
-newblk_lookup(struct fs *fs, daddr_t newblkno, int flags,
- struct newblk **newblkpp)
-{
- SIPHASH_CTX ctx;
- struct newblk *newblk;
- struct newblk_hashhead *newblkhd;
-
- SipHash24_Init(&ctx, &softdep_hashkey);
- SipHash24_Update(&ctx, &fs, sizeof(fs));
- SipHash24_Update(&ctx, &newblkno, sizeof(newblkno));
- newblkhd = &newblk_hashtbl[SipHash24_End(&ctx) & newblk_hash];
-top:
- LIST_FOREACH(newblk, newblkhd, nb_hash)
- if (newblkno == newblk->nb_newblkno && fs == newblk->nb_fs)
- break;
- if (newblk) {
- *newblkpp = newblk;
- return (1);
- }
- if ((flags & DEPALLOC) == 0) {
- *newblkpp = NULL;
- return (0);
- }
- if (sema_get(&newblk_in_progress, NULL) == 0)
- goto top;
- newblk = pool_get(&newblk_pool, PR_WAITOK);
- newblk->nb_state = 0;
- newblk->nb_fs = fs;
- newblk->nb_newblkno = newblkno;
- LIST_INSERT_HEAD(newblkhd, newblk, nb_hash);
- sema_release(&newblk_in_progress);
- *newblkpp = newblk;
- return (0);
-}
-
-/*
- * Executed during filesystem system initialization before
- * mounting any file systems.
- */
-void
-softdep_initialize(void)
-{
-
- bioops.io_start = softdep_disk_io_initiation;
- bioops.io_complete = softdep_disk_write_complete;
- bioops.io_deallocate = softdep_deallocate_dependencies;
- bioops.io_movedeps = softdep_move_dependencies;
- bioops.io_countdeps = softdep_count_dependencies;
-
- LIST_INIT(&mkdirlisthd);
- LIST_INIT(&softdep_workitem_pending);
-#ifdef KMEMSTATS
- max_softdeps = min (initialvnodes * 8,
- kmemstats[M_INODEDEP].ks_limit / (2 * sizeof(struct inodedep)));
-#else
- max_softdeps = initialvnodes * 4;
-#endif
- arc4random_buf(&softdep_hashkey, sizeof(softdep_hashkey));
- pagedep_hashtbl = hashinit(initialvnodes / 5, M_PAGEDEP, M_WAITOK,
- &pagedep_hash);
- sema_init(&pagedep_in_progress, "pagedep", PRIBIO);
- inodedep_hashtbl = hashinit(initialvnodes, M_INODEDEP, M_WAITOK,
- &inodedep_hash);
- sema_init(&inodedep_in_progress, "inodedep", PRIBIO);
- newblk_hashtbl = hashinit(64, M_NEWBLK, M_WAITOK, &newblk_hash);
- sema_init(&newblk_in_progress, "newblk", PRIBIO);
- timeout_set(&proc_waiting_timeout, pause_timer, NULL);
- pool_init(&pagedep_pool, sizeof(struct pagedep), 0, IPL_NONE,
- PR_WAITOK, "pagedep", NULL);
- pool_init(&inodedep_pool, sizeof(struct inodedep), 0, IPL_NONE,
- PR_WAITOK, "inodedep", NULL);
- pool_init(&newblk_pool, sizeof(struct newblk), 0, IPL_NONE,
- PR_WAITOK, "newblk", NULL);
- pool_init(&bmsafemap_pool, sizeof(struct bmsafemap), 0, IPL_NONE,
- PR_WAITOK, "bmsafemap", NULL);
- pool_init(&allocdirect_pool, sizeof(struct allocdirect), 0, IPL_NONE,
- PR_WAITOK, "allocdir", NULL);
- pool_init(&indirdep_pool, sizeof(struct indirdep), 0, IPL_NONE,
- PR_WAITOK, "indirdep", NULL);
- pool_init(&allocindir_pool, sizeof(struct allocindir), 0, IPL_NONE,
- PR_WAITOK, "allocindir", NULL);
- pool_init(&freefrag_pool, sizeof(struct freefrag), 0, IPL_NONE,
- PR_WAITOK, "freefrag", NULL);
- pool_init(&freeblks_pool, sizeof(struct freeblks), 0, IPL_NONE,
- PR_WAITOK, "freeblks", NULL);
- pool_init(&freefile_pool, sizeof(struct freefile), 0, IPL_NONE,
- PR_WAITOK, "freefile", NULL);
- pool_init(&diradd_pool, sizeof(struct diradd), 0, IPL_NONE,
- PR_WAITOK, "diradd", NULL);
- pool_init(&mkdir_pool, sizeof(struct mkdir), 0, IPL_NONE,
- PR_WAITOK, "mkdir", NULL);
- pool_init(&dirrem_pool, sizeof(struct dirrem), 0, IPL_NONE,
- PR_WAITOK, "dirrem", NULL);
- pool_init(&newdirblk_pool, sizeof(struct newdirblk), 0, IPL_NONE,
- PR_WAITOK, "newdirblk", NULL);
-}
-
-/*
- * Called at mount time to notify the dependency code that a
- * filesystem wishes to use it.
- */
-int
-softdep_mount(struct vnode *devvp, struct mount *mp, struct fs *fs,
- struct ucred *cred)
-{
- struct csum_total cstotal;
- struct cg *cgp;
- struct buf *bp;
- int error, cyl;
-
- KASSERTMSG(1, "softdep_mount should not have been called");
-
- /*
- * When doing soft updates, the counters in the
- * superblock may have gotten out of sync, so we have
- * to scan the cylinder groups and recalculate them.
- */
- if ((fs->fs_flags & FS_UNCLEAN) == 0)
- return (0);
- memset(&cstotal, 0, sizeof(cstotal));
- for (cyl = 0; cyl < fs->fs_ncg; cyl++) {
- if ((error = bread(devvp, fsbtodb(fs, cgtod(fs, cyl)),
- fs->fs_cgsize, &bp)) != 0) {
- brelse(bp);
- return (error);
- }
- cgp = (struct cg *)bp->b_data;
- cstotal.cs_nffree += cgp->cg_cs.cs_nffree;
- cstotal.cs_nbfree += cgp->cg_cs.cs_nbfree;
- cstotal.cs_nifree += cgp->cg_cs.cs_nifree;
- cstotal.cs_ndir += cgp->cg_cs.cs_ndir;
- fs->fs_cs(fs, cyl) = cgp->cg_cs;
- brelse(bp);
- }
-#ifdef DEBUG
- if (memcmp(&cstotal, &fs->fs_cstotal, sizeof(cstotal)))
- printf("ffs_mountfs: superblock updated for soft updates\n");
-#endif
- memcpy(&fs->fs_cstotal, &cstotal, sizeof(cstotal));
- return (0);
-}
-
-/*
- * Protecting the freemaps (or bitmaps).
- *
- * To eliminate the need to execute fsck before mounting a file system
- * after a power failure, one must (conservatively) guarantee that the
- * on-disk copy of the bitmaps never indicate that a live inode or block is
- * free. So, when a block or inode is allocated, the bitmap should be
- * updated (on disk) before any new pointers. When a block or inode is
- * freed, the bitmap should not be updated until all pointers have been
- * reset. The latter dependency is handled by the delayed de-allocation
- * approach described below for block and inode de-allocation. The former
- * dependency is handled by calling the following procedure when a block or
- * inode is allocated. When an inode is allocated an "inodedep" is created
- * with its DEPCOMPLETE flag cleared until its bitmap is written to disk.
- * Each "inodedep" is also inserted into the hash indexing structure so
- * that any additional link additions can be made dependent on the inode
- * allocation.
- *
- * The ufs file system maintains a number of free block counts (e.g., per
- * cylinder group, per cylinder and per <cylinder, rotational position> pair)
- * in addition to the bitmaps. These counts are used to improve efficiency
- * during allocation and therefore must be consistent with the bitmaps.
- * There is no convenient way to guarantee post-crash consistency of these
- * counts with simple update ordering, for two main reasons: (1) The counts
- * and bitmaps for a single cylinder group block are not in the same disk
- * sector. If a disk write is interrupted (e.g., by power failure), one may
- * be written and the other not. (2) Some of the counts are located in the
- * superblock rather than the cylinder group block. So, we focus our soft
- * updates implementation on protecting the bitmaps. When mounting a
- * filesystem, we recompute the auxiliary counts from the bitmaps.
- */
-
-/*
- * Called just after updating the cylinder group block to allocate an inode.
- */
-/* buffer for cylgroup block with inode map */
-/* inode related to allocation */
-/* new inode number being allocated */
-void
-softdep_setup_inomapdep(struct buf *bp, struct inode *ip, ufsino_t newinum)
-{
- struct inodedep *inodedep;
- struct bmsafemap *bmsafemap;
-
- /*
- * Create a dependency for the newly allocated inode.
- * Panic if it already exists as something is seriously wrong.
- * Otherwise add it to the dependency list for the buffer holding
- * the cylinder group map from which it was allocated.
- */
- ACQUIRE_LOCK(&lk);
- if (inodedep_lookup(ip->i_fs, newinum, DEPALLOC | NODELAY, &inodedep)
- != 0) {
- FREE_LOCK(&lk);
- panic("softdep_setup_inomapdep: found inode");
- }
- inodedep->id_buf = bp;
- inodedep->id_state &= ~DEPCOMPLETE;
- bmsafemap = bmsafemap_lookup(bp);
- LIST_INSERT_HEAD(&bmsafemap->sm_inodedephd, inodedep, id_deps);
- FREE_LOCK(&lk);
-}
-
-/*
- * Called just after updating the cylinder group block to
- * allocate block or fragment.
- */
-/* buffer for cylgroup block with block map */
-/* filesystem doing allocation */
-/* number of newly allocated block */
-void
-softdep_setup_blkmapdep(struct buf *bp, struct fs *fs, daddr_t newblkno)
-{
- struct newblk *newblk;
- struct bmsafemap *bmsafemap;
-
- /*
- * Create a dependency for the newly allocated block.
- * Add it to the dependency list for the buffer holding
- * the cylinder group map from which it was allocated.
- */
- if (newblk_lookup(fs, newblkno, DEPALLOC, &newblk) != 0)
- panic("softdep_setup_blkmapdep: found block");
- ACQUIRE_LOCK(&lk);
- newblk->nb_bmsafemap = bmsafemap = bmsafemap_lookup(bp);
- LIST_INSERT_HEAD(&bmsafemap->sm_newblkhd, newblk, nb_deps);
- FREE_LOCK(&lk);
-}
-
-/*
- * Find the bmsafemap associated with a cylinder group buffer.
- * If none exists, create one. The buffer must be locked when
- * this routine is called and this routine must be called with
- * splbio interrupts blocked.
- */
-STATIC struct bmsafemap *
-bmsafemap_lookup(struct buf *bp)
-{
- struct bmsafemap *bmsafemap;
- struct worklist *wk;
-
- splassert(IPL_BIO);
-
-#ifdef DEBUG
- if (lk.lkt_held == -1)
- panic("bmsafemap_lookup: lock not held");
-#endif
- LIST_FOREACH(wk, &bp->b_dep, wk_list)
- if (wk->wk_type == D_BMSAFEMAP)
- return (WK_BMSAFEMAP(wk));
- FREE_LOCK(&lk);
- bmsafemap = pool_get(&bmsafemap_pool, PR_WAITOK);
- bmsafemap->sm_list.wk_type = D_BMSAFEMAP;
- bmsafemap->sm_list.wk_state = 0;
- bmsafemap->sm_buf = bp;
- LIST_INIT(&bmsafemap->sm_allocdirecthd);
- LIST_INIT(&bmsafemap->sm_allocindirhd);
- LIST_INIT(&bmsafemap->sm_inodedephd);
- LIST_INIT(&bmsafemap->sm_newblkhd);
- ACQUIRE_LOCK(&lk);
- WORKLIST_INSERT(&bp->b_dep, &bmsafemap->sm_list);
- return (bmsafemap);
-}
-
-/*
- * Direct block allocation dependencies.
- *
- * When a new block is allocated, the corresponding disk locations must be
- * initialized (with zeros or new data) before the on-disk inode points to
- * them. Also, the freemap from which the block was allocated must be
- * updated (on disk) before the inode's pointer. These two dependencies are
- * independent of each other and are needed for all file blocks and indirect
- * blocks that are pointed to directly by the inode. Just before the
- * "in-core" version of the inode is updated with a newly allocated block
- * number, a procedure (below) is called to setup allocation dependency
- * structures. These structures are removed when the corresponding
- * dependencies are satisfied or when the block allocation becomes obsolete
- * (i.e., the file is deleted, the block is de-allocated, or the block is a
- * fragment that gets upgraded). All of these cases are handled in
- * procedures described later.
- *
- * When a file extension causes a fragment to be upgraded, either to a larger
- * fragment or to a full block, the on-disk location may change (if the
- * previous fragment could not simply be extended). In this case, the old
- * fragment must be de-allocated, but not until after the inode's pointer has
- * been updated. In most cases, this is handled by later procedures, which
- * will construct a "freefrag" structure to be added to the workitem queue
- * when the inode update is complete (or obsolete). The main exception to
- * this is when an allocation occurs while a pending allocation dependency
- * (for the same block pointer) remains. This case is handled in the main
- * allocation dependency setup procedure by immediately freeing the
- * unreferenced fragments.
- */
-/* inode to which block is being added */
-/* block pointer within inode */
-/* disk block number being added */
-/* previous block number, 0 unless frag */
-/* size of new block */
-/* size of new block */
-/* bp for allocated block */
-void
-softdep_setup_allocdirect(struct inode *ip, daddr_t lbn, daddr_t newblkno,
- daddr_t oldblkno, long newsize, long oldsize, struct buf *bp)
-{
- struct allocdirect *adp, *oldadp;
- struct allocdirectlst *adphead;
- struct bmsafemap *bmsafemap;
- struct inodedep *inodedep;
- struct pagedep *pagedep;
- struct newblk *newblk;
-
- adp = pool_get(&allocdirect_pool, PR_WAITOK | PR_ZERO);
- adp->ad_list.wk_type = D_ALLOCDIRECT;
- adp->ad_lbn = lbn;
- adp->ad_newblkno = newblkno;
- adp->ad_oldblkno = oldblkno;
- adp->ad_newsize = newsize;
- adp->ad_oldsize = oldsize;
- adp->ad_state = ATTACHED;
- LIST_INIT(&adp->ad_newdirblk);
- if (newblkno == oldblkno)
- adp->ad_freefrag = NULL;
- else
- adp->ad_freefrag = newfreefrag(ip, oldblkno, oldsize);
-
- if (newblk_lookup(ip->i_fs, newblkno, 0, &newblk) == 0)
- panic("softdep_setup_allocdirect: lost block");
-
- ACQUIRE_LOCK(&lk);
- inodedep_lookup(ip->i_fs, ip->i_number, DEPALLOC | NODELAY, &inodedep);
- adp->ad_inodedep = inodedep;
-
- if (newblk->nb_state == DEPCOMPLETE) {
- adp->ad_state |= DEPCOMPLETE;
- adp->ad_buf = NULL;
- } else {
- bmsafemap = newblk->nb_bmsafemap;
- adp->ad_buf = bmsafemap->sm_buf;
- LIST_REMOVE(newblk, nb_deps);
- LIST_INSERT_HEAD(&bmsafemap->sm_allocdirecthd, adp, ad_deps);
- }
- LIST_REMOVE(newblk, nb_hash);
- pool_put(&newblk_pool, newblk);
-
- if (bp == NULL) {
- /*
- * XXXUBC - Yes, I know how to fix this, but not right now.
- */
- panic("softdep_setup_allocdirect: Bonk art in the head");
- }
- WORKLIST_INSERT(&bp->b_dep, &adp->ad_list);
- if (lbn >= NDADDR) {
- /* allocating an indirect block */
- if (oldblkno != 0) {
- FREE_LOCK(&lk);
- panic("softdep_setup_allocdirect: non-zero indir");
- }
- } else {
- /*
- * Allocating a direct block.
- *
- * If we are allocating a directory block, then we must
- * allocate an associated pagedep to track additions and
- * deletions.
- */
- if ((DIP(ip, mode) & IFMT) == IFDIR &&
- pagedep_lookup(ip, lbn, DEPALLOC, &pagedep) == 0)
- WORKLIST_INSERT(&bp->b_dep, &pagedep->pd_list);
- }
- /*
- * The list of allocdirects must be kept in sorted and ascending
- * order so that the rollback routines can quickly determine the
- * first uncommitted block (the size of the file stored on disk
- * ends at the end of the lowest committed fragment, or if there
- * are no fragments, at the end of the highest committed block).
- * Since files generally grow, the typical case is that the new
- * block is to be added at the end of the list. We speed this
- * special case by checking against the last allocdirect in the
- * list before laboriously traversing the list looking for the
- * insertion point.
- */
- adphead = &inodedep->id_newinoupdt;
- oldadp = TAILQ_LAST(adphead, allocdirectlst);
- if (oldadp == NULL || oldadp->ad_lbn <= lbn) {
- /* insert at end of list */
- TAILQ_INSERT_TAIL(adphead, adp, ad_next);
- if (oldadp != NULL && oldadp->ad_lbn == lbn)
- allocdirect_merge(adphead, adp, oldadp);
- FREE_LOCK(&lk);
- return;
- }
- TAILQ_FOREACH(oldadp, adphead, ad_next) {
- if (oldadp->ad_lbn >= lbn)
- break;
- }
- if (oldadp == NULL) {
- FREE_LOCK(&lk);
- panic("softdep_setup_allocdirect: lost entry");
- }
- /* insert in middle of list */
- TAILQ_INSERT_BEFORE(oldadp, adp, ad_next);
- if (oldadp->ad_lbn == lbn)
- allocdirect_merge(adphead, adp, oldadp);
- FREE_LOCK(&lk);
-}
-
-/*
- * Replace an old allocdirect dependency with a newer one.
- * This routine must be called with splbio interrupts blocked.
- */
-/* head of list holding allocdirects */
-/* allocdirect being added */
-/* existing allocdirect being checked */
-STATIC void
-allocdirect_merge(struct allocdirectlst *adphead, struct allocdirect *newadp,
- struct allocdirect *oldadp)
-{
- struct worklist *wk;
- struct freefrag *freefrag;
- struct newdirblk *newdirblk;
-
- splassert(IPL_BIO);
-
-#ifdef DEBUG
- if (lk.lkt_held == -1)
- panic("allocdirect_merge: lock not held");
-#endif
- if (newadp->ad_oldblkno != oldadp->ad_newblkno ||
- newadp->ad_oldsize != oldadp->ad_newsize ||
- newadp->ad_lbn >= NDADDR) {
- FREE_LOCK(&lk);
- panic("allocdirect_merge: old %lld != new %lld || lbn %lld >= "
- "%d", (long long)newadp->ad_oldblkno,
- (long long)oldadp->ad_newblkno, (long long)newadp->ad_lbn,
- NDADDR);
- }
- newadp->ad_oldblkno = oldadp->ad_oldblkno;
- newadp->ad_oldsize = oldadp->ad_oldsize;
- /*
- * If the old dependency had a fragment to free or had never
- * previously had a block allocated, then the new dependency
- * can immediately post its freefrag and adopt the old freefrag.
- * This action is done by swapping the freefrag dependencies.
- * The new dependency gains the old one's freefrag, and the
- * old one gets the new one and then immediately puts it on
- * the worklist when it is freed by free_allocdirect. It is
- * not possible to do this swap when the old dependency had a
- * non-zero size but no previous fragment to free. This condition
- * arises when the new block is an extension of the old block.
- * Here, the first part of the fragment allocated to the new
- * dependency is part of the block currently claimed on disk by
- * the old dependency, so cannot legitimately be freed until the
- * conditions for the new dependency are fulfilled.
- */
- if (oldadp->ad_freefrag != NULL || oldadp->ad_oldblkno == 0) {
- freefrag = newadp->ad_freefrag;
- newadp->ad_freefrag = oldadp->ad_freefrag;
- oldadp->ad_freefrag = freefrag;
- }
- /*
- * If we are tracking a new directory-block allocation,
- * move it from the old allocdirect to the new allocdirect.
- */
- if ((wk = LIST_FIRST(&oldadp->ad_newdirblk)) != NULL) {
- newdirblk = WK_NEWDIRBLK(wk);
- WORKLIST_REMOVE(&newdirblk->db_list);
- if (LIST_FIRST(&oldadp->ad_newdirblk) != NULL)
- panic("allocdirect_merge: extra newdirblk");
- WORKLIST_INSERT(&newadp->ad_newdirblk, &newdirblk->db_list);
- }
- free_allocdirect(adphead, oldadp, 0);
-}
-
-/*
- * Allocate a new freefrag structure if needed.
- */
-STATIC struct freefrag *
-newfreefrag(struct inode *ip, daddr_t blkno, long size)
-{
- struct freefrag *freefrag;
- struct fs *fs;
-
- if (blkno == 0)
- return (NULL);
- fs = ip->i_fs;
- if (fragnum(fs, blkno) + numfrags(fs, size) > fs->fs_frag)
- panic("newfreefrag: frag size");
- freefrag = pool_get(&freefrag_pool, PR_WAITOK);
- freefrag->ff_list.wk_type = D_FREEFRAG;
- freefrag->ff_state = DIP(ip, uid) & ~ONWORKLIST; /* used below */
- freefrag->ff_inum = ip->i_number;
- freefrag->ff_mnt = ITOV(ip)->v_mount;
- freefrag->ff_devvp = ip->i_devvp;
- freefrag->ff_blkno = blkno;
- freefrag->ff_fragsize = size;
- return (freefrag);
-}
-
-/*
- * This workitem de-allocates fragments that were replaced during
- * file block allocation.
- */
-STATIC void
-handle_workitem_freefrag(struct freefrag *freefrag)
-{
- struct inode tip;
- struct ufs1_dinode dtip1;
-
- tip.i_vnode = NULL;
- tip.i_din1 = &dtip1;
- tip.i_fs = VFSTOUFS(freefrag->ff_mnt)->um_fs;
- tip.i_ump = VFSTOUFS(freefrag->ff_mnt);
- tip.i_dev = freefrag->ff_devvp->v_rdev;
- tip.i_number = freefrag->ff_inum;
- tip.i_ffs1_uid = freefrag->ff_state & ~ONWORKLIST; /* set above */
- ffs_blkfree(&tip, freefrag->ff_blkno, freefrag->ff_fragsize);
- pool_put(&freefrag_pool, freefrag);
-}
-
-/*
- * Indirect block allocation dependencies.
- *
- * The same dependencies that exist for a direct block also exist when
- * a new block is allocated and pointed to by an entry in a block of
- * indirect pointers. The undo/redo states described above are also
- * used here. Because an indirect block contains many pointers that
- * may have dependencies, a second copy of the entire in-memory indirect
- * block is kept. The buffer cache copy is always completely up-to-date.
- * The second copy, which is used only as a source for disk writes,
- * contains only the safe pointers (i.e., those that have no remaining
- * update dependencies). The second copy is freed when all pointers
- * are safe. The cache is not allowed to replace indirect blocks with
- * pending update dependencies. If a buffer containing an indirect
- * block with dependencies is written, these routines will mark it
- * dirty again. It can only be successfully written once all the
- * dependencies are removed. The ffs_fsync routine in conjunction with
- * softdep_sync_metadata work together to get all the dependencies
- * removed so that a file can be successfully written to disk. Three
- * procedures are used when setting up indirect block pointer
- * dependencies. The division is necessary because of the organization
- * of the "balloc" routine and because of the distinction between file
- * pages and file metadata blocks.
- */
-
-/*
- * Allocate a new allocindir structure.
- */
-/* inode for file being extended */
-/* offset of pointer in indirect block */
-/* disk block number being added */
-/* previous block number, 0 if none */
-STATIC struct allocindir *
-newallocindir(struct inode *ip, int ptrno, daddr_t newblkno,
- daddr_t oldblkno)
-{
- struct allocindir *aip;
-
- aip = pool_get(&allocindir_pool, PR_WAITOK | PR_ZERO);
- aip->ai_list.wk_type = D_ALLOCINDIR;
- aip->ai_state = ATTACHED;
- aip->ai_offset = ptrno;
- aip->ai_newblkno = newblkno;
- aip->ai_oldblkno = oldblkno;
- aip->ai_freefrag = newfreefrag(ip, oldblkno, ip->i_fs->fs_bsize);
- return (aip);
-}
-
-/*
- * Called just before setting an indirect block pointer
- * to a newly allocated file page.
- */
-/* inode for file being extended */
-/* allocated block number within file */
-/* buffer with indirect blk referencing page */
-/* offset of pointer in indirect block */
-/* disk block number being added */
-/* previous block number, 0 if none */
-/* buffer holding allocated page */
-void
-softdep_setup_allocindir_page(struct inode *ip, daddr_t lbn, struct buf *bp,
- int ptrno, daddr_t newblkno, daddr_t oldblkno, struct buf *nbp)
-{
- struct allocindir *aip;
- struct pagedep *pagedep;
-
- aip = newallocindir(ip, ptrno, newblkno, oldblkno);
- ACQUIRE_LOCK(&lk);
- /*
- * If we are allocating a directory page, then we must
- * allocate an associated pagedep to track additions and
- * deletions.
- */
- if ((DIP(ip, mode) & IFMT) == IFDIR &&
- pagedep_lookup(ip, lbn, DEPALLOC, &pagedep) == 0)
- WORKLIST_INSERT(&nbp->b_dep, &pagedep->pd_list);
- if (nbp == NULL) {
- /*
- * XXXUBC - Yes, I know how to fix this, but not right now.
- */
- panic("softdep_setup_allocindir_page: Bonk art in the head");
- }
- WORKLIST_INSERT(&nbp->b_dep, &aip->ai_list);
- FREE_LOCK(&lk);
- setup_allocindir_phase2(bp, ip, aip);
-}
-
-/*
- * Called just before setting an indirect block pointer to a
- * newly allocated indirect block.
- */
-/* newly allocated indirect block */
-/* inode for file being extended */
-/* indirect block referencing allocated block */
-/* offset of pointer in indirect block */
-/* disk block number being added */
-void
-softdep_setup_allocindir_meta(struct buf *nbp, struct inode *ip,
- struct buf *bp, int ptrno, daddr_t newblkno)
-{
- struct allocindir *aip;
-
- aip = newallocindir(ip, ptrno, newblkno, 0);
- ACQUIRE_LOCK(&lk);
- WORKLIST_INSERT(&nbp->b_dep, &aip->ai_list);
- FREE_LOCK(&lk);
- setup_allocindir_phase2(bp, ip, aip);
-}
-
-/*
- * Called to finish the allocation of the "aip" allocated
- * by one of the two routines above.
- */
-/* in-memory copy of the indirect block */
-/* inode for file being extended */
-/* allocindir allocated by the above routines */
-STATIC void
-setup_allocindir_phase2(struct buf *bp, struct inode *ip,
- struct allocindir *aip)
-{
- struct worklist *wk;
- struct indirdep *indirdep, *newindirdep;
- struct bmsafemap *bmsafemap;
- struct allocindir *oldaip;
- struct freefrag *freefrag;
- struct newblk *newblk;
-
- if (bp->b_lblkno >= 0)
- panic("setup_allocindir_phase2: not indir blk");
- for (indirdep = NULL, newindirdep = NULL; ; ) {
- ACQUIRE_LOCK(&lk);
- LIST_FOREACH(wk, &bp->b_dep, wk_list) {
- if (wk->wk_type != D_INDIRDEP)
- continue;
- indirdep = WK_INDIRDEP(wk);
- break;
- }
- if (indirdep == NULL && newindirdep) {
- indirdep = newindirdep;
- WORKLIST_INSERT(&bp->b_dep, &indirdep->ir_list);
- newindirdep = NULL;
- }
- FREE_LOCK(&lk);
- if (indirdep) {
- if (newblk_lookup(ip->i_fs, aip->ai_newblkno, 0,
- &newblk) == 0)
- panic("setup_allocindir: lost block");
- ACQUIRE_LOCK(&lk);
- if (newblk->nb_state == DEPCOMPLETE) {
- aip->ai_state |= DEPCOMPLETE;
- aip->ai_buf = NULL;
- } else {
- bmsafemap = newblk->nb_bmsafemap;
- aip->ai_buf = bmsafemap->sm_buf;
- LIST_REMOVE(newblk, nb_deps);
- LIST_INSERT_HEAD(&bmsafemap->sm_allocindirhd,
- aip, ai_deps);
- }
- LIST_REMOVE(newblk, nb_hash);
- pool_put(&newblk_pool, newblk);
- aip->ai_indirdep = indirdep;
- /*
- * Check to see if there is an existing dependency
- * for this block. If there is, merge the old
- * dependency into the new one.
- */
- if (aip->ai_oldblkno == 0)
- oldaip = NULL;
- else
-
- LIST_FOREACH(oldaip, &indirdep->ir_deplisthd, ai_next)
- if (oldaip->ai_offset == aip->ai_offset)
- break;
- freefrag = NULL;
- if (oldaip != NULL) {
- if (oldaip->ai_newblkno != aip->ai_oldblkno) {
- FREE_LOCK(&lk);
- panic("setup_allocindir_phase2: blkno");
- }
- aip->ai_oldblkno = oldaip->ai_oldblkno;
- freefrag = aip->ai_freefrag;
- aip->ai_freefrag = oldaip->ai_freefrag;
- oldaip->ai_freefrag = NULL;
- free_allocindir(oldaip, NULL);
- }
- LIST_INSERT_HEAD(&indirdep->ir_deplisthd, aip, ai_next);
- if (ip->i_ump->um_fstype == UM_UFS1)
- ((int32_t *)indirdep->ir_savebp->b_data)
- [aip->ai_offset] = aip->ai_oldblkno;
- else
- ((int64_t *)indirdep->ir_savebp->b_data)
- [aip->ai_offset] = aip->ai_oldblkno;
- FREE_LOCK(&lk);
- if (freefrag != NULL)
- handle_workitem_freefrag(freefrag);
- }
- if (newindirdep) {
- if (indirdep->ir_savebp != NULL)
- brelse(newindirdep->ir_savebp);
- WORKITEM_FREE(newindirdep, D_INDIRDEP);
- }
- if (indirdep)
- break;
- newindirdep = pool_get(&indirdep_pool, PR_WAITOK);
- newindirdep->ir_list.wk_type = D_INDIRDEP;
- newindirdep->ir_state = ATTACHED;
- if (ip->i_ump->um_fstype == UM_UFS1)
- newindirdep->ir_state |= UFS1FMT;
- LIST_INIT(&newindirdep->ir_deplisthd);
- LIST_INIT(&newindirdep->ir_donehd);
- if (bp->b_blkno == bp->b_lblkno) {
- VOP_BMAP(bp->b_vp, bp->b_lblkno, NULL, &bp->b_blkno,
- NULL);
- }
- newindirdep->ir_savebp =
- getblk(ip->i_devvp, bp->b_blkno, bp->b_bcount, 0, INFSLP);
-#if 0
- BUF_KERNPROC(newindirdep->ir_savebp);
-#endif
- memcpy(newindirdep->ir_savebp->b_data, bp->b_data, bp->b_bcount);
- }
-}
-
-/*
- * Block de-allocation dependencies.
- *
- * When blocks are de-allocated, the on-disk pointers must be nullified before
- * the blocks are made available for use by other files. (The true
- * requirement is that old pointers must be nullified before new on-disk
- * pointers are set. We chose this slightly more stringent requirement to
- * reduce complexity.) Our implementation handles this dependency by updating
- * the inode (or indirect block) appropriately but delaying the actual block
- * de-allocation (i.e., freemap and free space count manipulation) until
- * after the updated versions reach stable storage. After the disk is
- * updated, the blocks can be safely de-allocated whenever it is convenient.
- * This implementation handles only the common case of reducing a file's
- * length to zero. Other cases are handled by the conventional synchronous
- * write approach.
- *
- * The ffs implementation with which we worked double-checks
- * the state of the block pointers and file size as it reduces
- * a file's length. Some of this code is replicated here in our
- * soft updates implementation. The freeblks->fb_chkcnt field is
- * used to transfer a part of this information to the procedure
- * that eventually de-allocates the blocks.
- *
- * This routine should be called from the routine that shortens
- * a file's length, before the inode's size or block pointers
- * are modified. It will save the block pointer information for
- * later release and zero the inode so that the calling routine
- * can release it.
- */
-/* The inode whose length is to be reduced */
-/* The new length for the file */
-void
-softdep_setup_freeblocks(struct inode *ip, off_t length)
-{
- struct freeblks *freeblks;
- struct inodedep *inodedep;
- struct allocdirect *adp;
- struct vnode *vp;
- struct buf *bp;
- struct fs *fs;
- int i, delay, error;
-
- fs = ip->i_fs;
- if (length != 0)
- panic("softdep_setup_freeblocks: non-zero length");
- freeblks = pool_get(&freeblks_pool, PR_WAITOK | PR_ZERO);
- freeblks->fb_list.wk_type = D_FREEBLKS;
- freeblks->fb_state = ATTACHED;
- freeblks->fb_uid = DIP(ip, uid);
- freeblks->fb_previousinum = ip->i_number;
- freeblks->fb_devvp = ip->i_devvp;
- freeblks->fb_mnt = ITOV(ip)->v_mount;
- freeblks->fb_oldsize = DIP(ip, size);
- freeblks->fb_newsize = length;
- freeblks->fb_chkcnt = DIP(ip, blocks);
-
- for (i = 0; i < NDADDR; i++) {
- freeblks->fb_dblks[i] = DIP(ip, db[i]);
- DIP_ASSIGN(ip, db[i], 0);
- }
-
- for (i = 0; i < NIADDR; i++) {
- freeblks->fb_iblks[i] = DIP(ip, ib[i]);
- DIP_ASSIGN(ip, ib[i], 0);
- }
-
- DIP_ASSIGN(ip, blocks, 0);
- DIP_ASSIGN(ip, size, 0);
-
- /*
- * Push the zero'ed inode to its disk buffer so that we are free
- * to delete its dependencies below. Once the dependencies are gone
- * the buffer can be safely released.
- */
- if ((error = bread(ip->i_devvp,
- fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
- (int)fs->fs_bsize, &bp)) != 0)
- softdep_error("softdep_setup_freeblocks", error);
-
- if (ip->i_ump->um_fstype == UM_UFS1)
- *((struct ufs1_dinode *) bp->b_data +
- ino_to_fsbo(fs, ip->i_number)) = *ip->i_din1;
- else
- *((struct ufs2_dinode *) bp->b_data +
- ino_to_fsbo(fs, ip->i_number)) = *ip->i_din2;
-
- /*
- * Find and eliminate any inode dependencies.
- */
- ACQUIRE_LOCK(&lk);
- (void) inodedep_lookup(fs, ip->i_number, DEPALLOC, &inodedep);
- if ((inodedep->id_state & IOSTARTED) != 0) {
- FREE_LOCK(&lk);
- panic("softdep_setup_freeblocks: inode busy");
- }
- /*
- * Add the freeblks structure to the list of operations that
- * must await the zero'ed inode being written to disk. If we
- * still have a bitmap dependency (delay == 0), then the inode
- * has never been written to disk, so we can process the
- * freeblks below once we have deleted the dependencies.
- */
- delay = (inodedep->id_state & DEPCOMPLETE);
- if (delay)
- WORKLIST_INSERT(&inodedep->id_bufwait, &freeblks->fb_list);
- /*
- * Because the file length has been truncated to zero, any
- * pending block allocation dependency structures associated
- * with this inode are obsolete and can simply be de-allocated.
- * We must first merge the two dependency lists to get rid of
- * any duplicate freefrag structures, then purge the merged list.
- * If we still have a bitmap dependency, then the inode has never
- * been written to disk, so we can free any fragments without delay.
- */
- merge_inode_lists(inodedep);
- while ((adp = TAILQ_FIRST(&inodedep->id_inoupdt)) != NULL)
- free_allocdirect(&inodedep->id_inoupdt, adp, delay);
- FREE_LOCK(&lk);
- bdwrite(bp);
- /*
- * We must wait for any I/O in progress to finish so that
- * all potential buffers on the dirty list will be visible.
- * Once they are all there, walk the list and get rid of
- * any dependencies.
- */
- vp = ITOV(ip);
- ACQUIRE_LOCK(&lk);
- drain_output(vp, 1);
- while ((bp = LIST_FIRST(&vp->v_dirtyblkhd))) {
- if (getdirtybuf(bp, MNT_WAIT) <= 0)
- break;
- (void) inodedep_lookup(fs, ip->i_number, 0, &inodedep);
- deallocate_dependencies(bp, inodedep);
- bp->b_flags |= B_INVAL | B_NOCACHE;
- FREE_LOCK(&lk);
- brelse(bp);
- ACQUIRE_LOCK(&lk);
- }
- if (inodedep_lookup(fs, ip->i_number, 0, &inodedep) != 0)
- (void) free_inodedep(inodedep);
-
- if (delay) {
- freeblks->fb_state |= DEPCOMPLETE;
- /*
- * If the inode with zeroed block pointers is now on disk we
- * can start freeing blocks. Add freeblks to the worklist
- * instead of calling handle_workitem_freeblocks() directly as
- * it is more likely that additional IO is needed to complete
- * the request than in the !delay case.
- */
- if ((freeblks->fb_state & ALLCOMPLETE) == ALLCOMPLETE)
- add_to_worklist(&freeblks->fb_list);
- }
-
- FREE_LOCK(&lk);
- /*
- * If the inode has never been written to disk (delay == 0),
- * then we can process the freeblks now that we have deleted
- * the dependencies.
- */
- if (!delay)
- handle_workitem_freeblocks(freeblks);
-}
-
-/*
- * Reclaim any dependency structures from a buffer that is about to
- * be reallocated to a new vnode. The buffer must be locked, thus,
- * no I/O completion operations can occur while we are manipulating
- * its associated dependencies. The mutex is held so that other I/O's
- * associated with related dependencies do not occur.
- */
-STATIC void
-deallocate_dependencies(struct buf *bp, struct inodedep *inodedep)
-{
- struct worklist *wk;
- struct indirdep *indirdep;
- struct allocindir *aip;
- struct pagedep *pagedep;
- struct dirrem *dirrem;
- struct diradd *dap;
- int i;
-
- while ((wk = LIST_FIRST(&bp->b_dep)) != NULL) {
- switch (wk->wk_type) {
-
- case D_INDIRDEP:
- indirdep = WK_INDIRDEP(wk);
- /*
- * None of the indirect pointers will ever be visible,
- * so they can simply be tossed. GOINGAWAY ensures
- * that allocated pointers will be saved in the buffer
- * cache until they are freed. Note that they will
- * only be able to be found by their physical address
- * since the inode mapping the logical address will
- * be gone. The save buffer used for the safe copy
- * was allocated in setup_allocindir_phase2 using
- * the physical address so it could be used for this
- * purpose. Hence we swap the safe copy with the real
- * copy, allowing the safe copy to be freed and holding
- * on to the real copy for later use in indir_trunc.
- */
- if (indirdep->ir_state & GOINGAWAY) {
- FREE_LOCK(&lk);
- panic("deallocate_dependencies: already gone");
- }
- indirdep->ir_state |= GOINGAWAY;
- while ((aip = LIST_FIRST(&indirdep->ir_deplisthd)))
- free_allocindir(aip, inodedep);
- if (bp->b_lblkno >= 0 ||
- bp->b_blkno != indirdep->ir_savebp->b_lblkno) {
- FREE_LOCK(&lk);
- panic("deallocate_dependencies: not indir");
- }
- memcpy(indirdep->ir_savebp->b_data, bp->b_data,
- bp->b_bcount);
- WORKLIST_REMOVE(wk);
- WORKLIST_INSERT(&indirdep->ir_savebp->b_dep, wk);
- continue;
-
- case D_PAGEDEP:
- pagedep = WK_PAGEDEP(wk);
- /*
- * None of the directory additions will ever be
- * visible, so they can simply be tossed.
- */
- for (i = 0; i < DAHASHSZ; i++)
- while ((dap =
- LIST_FIRST(&pagedep->pd_diraddhd[i])))
- free_diradd(dap);
- while ((dap = LIST_FIRST(&pagedep->pd_pendinghd)))
- free_diradd(dap);
- /*
- * Copy any directory remove dependencies to the list
- * to be processed after the zero'ed inode is written.
- * If the inode has already been written, then they
- * can be dumped directly onto the work list.
- */
- while ((dirrem = LIST_FIRST(&pagedep->pd_dirremhd))) {
- LIST_REMOVE(dirrem, dm_next);
- dirrem->dm_dirinum = pagedep->pd_ino;
- if (inodedep == NULL ||
- (inodedep->id_state & ALLCOMPLETE) ==
- ALLCOMPLETE)
- add_to_worklist(&dirrem->dm_list);
- else
- WORKLIST_INSERT(&inodedep->id_bufwait,
- &dirrem->dm_list);
- }
- if ((pagedep->pd_state & NEWBLOCK) != 0) {
- LIST_FOREACH(wk, &inodedep->id_bufwait, wk_list)
- if (wk->wk_type == D_NEWDIRBLK &&
- WK_NEWDIRBLK(wk)->db_pagedep ==
- pagedep)
- break;
- if (wk != NULL) {
- WORKLIST_REMOVE(wk);
- free_newdirblk(WK_NEWDIRBLK(wk));
- } else {
- FREE_LOCK(&lk);
- panic("deallocate_dependencies: "
- "lost pagedep");
- }
- }
- WORKLIST_REMOVE(&pagedep->pd_list);
- LIST_REMOVE(pagedep, pd_hash);
- WORKITEM_FREE(pagedep, D_PAGEDEP);
- continue;
-
- case D_ALLOCINDIR:
- free_allocindir(WK_ALLOCINDIR(wk), inodedep);
- continue;
-
- case D_ALLOCDIRECT:
- case D_INODEDEP:
- FREE_LOCK(&lk);
- panic("deallocate_dependencies: Unexpected type %s",
- TYPENAME(wk->wk_type));
- /* NOTREACHED */
-
- default:
- FREE_LOCK(&lk);
- panic("deallocate_dependencies: Unknown type %s",
- TYPENAME(wk->wk_type));
- /* NOTREACHED */
- }
- }
-}
-
-/*
- * Free an allocdirect. Generate a new freefrag work request if appropriate.
- * This routine must be called with splbio interrupts blocked.
- */
-STATIC void
-free_allocdirect(struct allocdirectlst *adphead, struct allocdirect *adp,
- int delay)
-{
- struct newdirblk *newdirblk;
- struct worklist *wk;
-
- splassert(IPL_BIO);
-
-#ifdef DEBUG
- if (lk.lkt_held == -1)
- panic("free_allocdirect: lock not held");
-#endif
- if ((adp->ad_state & DEPCOMPLETE) == 0)
- LIST_REMOVE(adp, ad_deps);
- TAILQ_REMOVE(adphead, adp, ad_next);
- if ((adp->ad_state & COMPLETE) == 0)
- WORKLIST_REMOVE(&adp->ad_list);
- if (adp->ad_freefrag != NULL) {
- if (delay)
- WORKLIST_INSERT(&adp->ad_inodedep->id_bufwait,
- &adp->ad_freefrag->ff_list);
- else
- add_to_worklist(&adp->ad_freefrag->ff_list);
- }
- if ((wk = LIST_FIRST(&adp->ad_newdirblk)) != NULL) {
- newdirblk = WK_NEWDIRBLK(wk);
- WORKLIST_REMOVE(&newdirblk->db_list);
- if (LIST_FIRST(&adp->ad_newdirblk) != NULL)
- panic("free_allocdirect: extra newdirblk");
- if (delay)
- WORKLIST_INSERT(&adp->ad_inodedep->id_bufwait,
- &newdirblk->db_list);
- else
- free_newdirblk(newdirblk);
- }
- WORKITEM_FREE(adp, D_ALLOCDIRECT);
-}
-
-/*
- * Free a newdirblk. Clear the NEWBLOCK flag on its associated pagedep.
- * This routine must be called with splbio interrupts blocked.
- */
-void
-free_newdirblk(struct newdirblk *newdirblk)
-{
- struct pagedep *pagedep;
- struct diradd *dap;
- int i;
-
- splassert(IPL_BIO);
-
-#ifdef DEBUG
- if (lk.lkt_held == -1)
- panic("free_newdirblk: lock not held");
-#endif
- /*
- * If the pagedep is still linked onto the directory buffer
- * dependency chain, then some of the entries on the
- * pd_pendinghd list may not be committed to disk yet. In
- * this case, we will simply clear the NEWBLOCK flag and
- * let the pd_pendinghd list be processed when the pagedep
- * is next written. If the pagedep is no longer on the buffer
- * dependency chain, then all the entries on the pd_pending
- * list are committed to disk and we can free them here.
- */
- pagedep = newdirblk->db_pagedep;
- pagedep->pd_state &= ~NEWBLOCK;
- if ((pagedep->pd_state & ONWORKLIST) == 0)
- while ((dap = LIST_FIRST(&pagedep->pd_pendinghd)) != NULL)
- free_diradd(dap);
- /*
- * If no dependencies remain, the pagedep will be freed.
- */
- for (i = 0; i < DAHASHSZ; i++)
- if (LIST_FIRST(&pagedep->pd_diraddhd[i]) != NULL)
- break;
- if (i == DAHASHSZ && (pagedep->pd_state & ONWORKLIST) == 0) {
- LIST_REMOVE(pagedep, pd_hash);
- WORKITEM_FREE(pagedep, D_PAGEDEP);
- }
- WORKITEM_FREE(newdirblk, D_NEWDIRBLK);
-}
-
-/*
- * Prepare an inode to be freed. The actual free operation is not
- * done until the zero'ed inode has been written to disk.
- */
-void
-softdep_freefile(struct vnode *pvp, ufsino_t ino, mode_t mode)
-{
- struct inode *ip = VTOI(pvp);
- struct inodedep *inodedep;
- struct freefile *freefile;
-
- /*
- * This sets up the inode de-allocation dependency.
- */
- freefile = pool_get(&freefile_pool, PR_WAITOK);
- freefile->fx_list.wk_type = D_FREEFILE;
- freefile->fx_list.wk_state = 0;
- freefile->fx_mode = mode;
- freefile->fx_oldinum = ino;
- freefile->fx_devvp = ip->i_devvp;
- freefile->fx_mnt = ITOV(ip)->v_mount;
-
- /*
- * If the inodedep does not exist, then the zero'ed inode has
- * been written to disk. If the allocated inode has never been
- * written to disk, then the on-disk inode is zero'ed. In either
- * case we can free the file immediately.
- */
- ACQUIRE_LOCK(&lk);
- if (inodedep_lookup(ip->i_fs, ino, 0, &inodedep) == 0 ||
- check_inode_unwritten(inodedep)) {
- FREE_LOCK(&lk);
- handle_workitem_freefile(freefile);
- return;
- }
- WORKLIST_INSERT(&inodedep->id_inowait, &freefile->fx_list);
- FREE_LOCK(&lk);
-}
-
-/*
- * Check to see if an inode has never been written to disk. If
- * so free the inodedep and return success, otherwise return failure.
- * This routine must be called with splbio interrupts blocked.
- *
- * If we still have a bitmap dependency, then the inode has never
- * been written to disk. Drop the dependency as it is no longer
- * necessary since the inode is being deallocated. We set the
- * ALLCOMPLETE flags since the bitmap now properly shows that the
- * inode is not allocated. Even if the inode is actively being
- * written, it has been rolled back to its zero'ed state, so we
- * are ensured that a zero inode is what is on the disk. For short
- * lived files, this change will usually result in removing all the
- * dependencies from the inode so that it can be freed immediately.
- */
-STATIC int
-check_inode_unwritten(struct inodedep *inodedep)
-{
- splassert(IPL_BIO);
-
- if ((inodedep->id_state & DEPCOMPLETE) != 0 ||
- LIST_FIRST(&inodedep->id_pendinghd) != NULL ||
- LIST_FIRST(&inodedep->id_bufwait) != NULL ||
- LIST_FIRST(&inodedep->id_inowait) != NULL ||
- TAILQ_FIRST(&inodedep->id_inoupdt) != NULL ||
- TAILQ_FIRST(&inodedep->id_newinoupdt) != NULL ||
- inodedep->id_nlinkdelta != 0)
- return (0);
- inodedep->id_state |= ALLCOMPLETE;
- LIST_REMOVE(inodedep, id_deps);
- inodedep->id_buf = NULL;
- if (inodedep->id_state & ONWORKLIST)
- WORKLIST_REMOVE(&inodedep->id_list);
- if (inodedep->id_savedino1 != NULL) {
- free(inodedep->id_savedino1, M_INODEDEP, inodedep->id_unsize);
- inodedep->id_savedino1 = NULL;
- }
- if (free_inodedep(inodedep) == 0) {
- FREE_LOCK(&lk);
- panic("check_inode_unwritten: busy inode");
- }
- return (1);
-}
-
-/*
- * Try to free an inodedep structure. Return 1 if it could be freed.
- */
-STATIC int
-free_inodedep(struct inodedep *inodedep)
-{
-
- if ((inodedep->id_state & ONWORKLIST) != 0 ||
- (inodedep->id_state & ALLCOMPLETE) != ALLCOMPLETE ||
- LIST_FIRST(&inodedep->id_pendinghd) != NULL ||
- LIST_FIRST(&inodedep->id_bufwait) != NULL ||
- LIST_FIRST(&inodedep->id_inowait) != NULL ||
- TAILQ_FIRST(&inodedep->id_inoupdt) != NULL ||
- TAILQ_FIRST(&inodedep->id_newinoupdt) != NULL ||
- inodedep->id_nlinkdelta != 0 || inodedep->id_savedino1 != NULL)
- return (0);
- LIST_REMOVE(inodedep, id_hash);
- WORKITEM_FREE(inodedep, D_INODEDEP);
- num_inodedep -= 1;
- return (1);
-}
-
-/*
- * This workitem routine performs the block de-allocation.
- * The workitem is added to the pending list after the updated
- * inode block has been written to disk. As mentioned above,
- * checks regarding the number of blocks de-allocated (compared
- * to the number of blocks allocated for the file) are also
- * performed in this function.
- */
-STATIC void
-handle_workitem_freeblocks(struct freeblks *freeblks)
-{
- struct inode tip;
- daddr_t bn;
- union {
- struct ufs1_dinode di1;
- struct ufs2_dinode di2;
- } di;
- struct fs *fs;
- int i, level, bsize;
- long nblocks, blocksreleased = 0;
- int error, allerror = 0;
- daddr_t baselbns[NIADDR], tmpval;
-
- if (VFSTOUFS(freeblks->fb_mnt)->um_fstype == UM_UFS1)
- tip.i_din1 = &di.di1;
- else
- tip.i_din2 = &di.di2;
-
- tip.i_fs = fs = VFSTOUFS(freeblks->fb_mnt)->um_fs;
- tip.i_number = freeblks->fb_previousinum;
- tip.i_ump = VFSTOUFS(freeblks->fb_mnt);
- tip.i_dev = freeblks->fb_devvp->v_rdev;
- DIP_ASSIGN(&tip, size, freeblks->fb_oldsize);
- DIP_ASSIGN(&tip, uid, freeblks->fb_uid);
- tip.i_vnode = NULL;
- tmpval = 1;
- baselbns[0] = NDADDR;
- for (i = 1; i < NIADDR; i++) {
- tmpval *= NINDIR(fs);
- baselbns[i] = baselbns[i - 1] + tmpval;
- }
- nblocks = btodb(fs->fs_bsize);
- blocksreleased = 0;
- /*
- * Indirect blocks first.
- */
- for (level = (NIADDR - 1); level >= 0; level--) {
- if ((bn = freeblks->fb_iblks[level]) == 0)
- continue;
- if ((error = indir_trunc(&tip, fsbtodb(fs, bn), level,
- baselbns[level], &blocksreleased)) != 0)
- allerror = error;
- ffs_blkfree(&tip, bn, fs->fs_bsize);
- blocksreleased += nblocks;
- }
- /*
- * All direct blocks or frags.
- */
- for (i = (NDADDR - 1); i >= 0; i--) {
- if ((bn = freeblks->fb_dblks[i]) == 0)
- continue;
- bsize = blksize(fs, &tip, i);
- ffs_blkfree(&tip, bn, bsize);
- blocksreleased += btodb(bsize);
- }
-
-#ifdef DIAGNOSTIC
- if (freeblks->fb_chkcnt != blocksreleased)
- printf("handle_workitem_freeblocks: block count\n");
- if (allerror)
- softdep_error("handle_workitem_freeblks", allerror);
-#endif /* DIAGNOSTIC */
- WORKITEM_FREE(freeblks, D_FREEBLKS);
-}
-
-/*
- * Release blocks associated with the inode ip and stored in the indirect
- * block dbn. If level is greater than SINGLE, the block is an indirect block
- * and recursive calls to indirtrunc must be used to cleanse other indirect
- * blocks.
- */
-STATIC int
-indir_trunc(struct inode *ip, daddr_t dbn, int level, daddr_t lbn,
- long *countp)
-{
- struct buf *bp;
- int32_t *bap1 = NULL;
- int64_t nb, *bap2 = NULL;
- struct fs *fs;
- struct worklist *wk;
- struct indirdep *indirdep;
- int i, lbnadd, nblocks, ufs1fmt;
- int error, allerror = 0;
-
- fs = ip->i_fs;
- lbnadd = 1;
- for (i = level; i > 0; i--)
- lbnadd *= NINDIR(fs);
- /*
- * Get buffer of block pointers to be freed. This routine is not
- * called until the zero'ed inode has been written, so it is safe
- * to free blocks as they are encountered. Because the inode has
- * been zero'ed, calls to bmap on these blocks will fail. So, we
- * have to use the on-disk address and the block device for the
- * filesystem to look them up. If the file was deleted before its
- * indirect blocks were all written to disk, the routine that set
- * us up (deallocate_dependencies) will have arranged to leave
- * a complete copy of the indirect block in memory for our use.
- * Otherwise we have to read the blocks in from the disk.
- */
- ACQUIRE_LOCK(&lk);
- if ((bp = incore(ip->i_devvp, dbn)) != NULL &&
- (wk = LIST_FIRST(&bp->b_dep)) != NULL) {
- if (wk->wk_type != D_INDIRDEP ||
- (indirdep = WK_INDIRDEP(wk))->ir_savebp != bp ||
- (indirdep->ir_state & GOINGAWAY) == 0) {
- FREE_LOCK(&lk);
- panic("indir_trunc: lost indirdep");
- }
- WORKLIST_REMOVE(wk);
- WORKITEM_FREE(indirdep, D_INDIRDEP);
- if (LIST_FIRST(&bp->b_dep) != NULL) {
- FREE_LOCK(&lk);
- panic("indir_trunc: dangling dep");
- }
- FREE_LOCK(&lk);
- } else {
- FREE_LOCK(&lk);
- error = bread(ip->i_devvp, dbn, (int)fs->fs_bsize, &bp);
- if (error)
- return (error);
- }
- /*
- * Recursively free indirect blocks.
- */
- if (ip->i_ump->um_fstype == UM_UFS1) {
- ufs1fmt = 1;
- bap1 = (int32_t *)bp->b_data;
- } else {
- ufs1fmt = 0;
- bap2 = (int64_t *)bp->b_data;
- }
- nblocks = btodb(fs->fs_bsize);
- for (i = NINDIR(fs) - 1; i >= 0; i--) {
- if (ufs1fmt)
- nb = bap1[i];
- else
- nb = bap2[i];
- if (nb == 0)
- continue;
- if (level != 0) {
- if ((error = indir_trunc(ip, fsbtodb(fs, nb),
- level - 1, lbn + (i * lbnadd), countp)) != 0)
- allerror = error;
- }
- ffs_blkfree(ip, nb, fs->fs_bsize);
- *countp += nblocks;
- }
- bp->b_flags |= B_INVAL | B_NOCACHE;
- brelse(bp);
- return (allerror);
-}
-
-/*
- * Free an allocindir.
- * This routine must be called with splbio interrupts blocked.
- */
-STATIC void
-free_allocindir(struct allocindir *aip, struct inodedep *inodedep)
-{
- struct freefrag *freefrag;
-
- splassert(IPL_BIO);
-
-#ifdef DEBUG
- if (lk.lkt_held == -1)
- panic("free_allocindir: lock not held");
-#endif
- if ((aip->ai_state & DEPCOMPLETE) == 0)
- LIST_REMOVE(aip, ai_deps);
- if (aip->ai_state & ONWORKLIST)
- WORKLIST_REMOVE(&aip->ai_list);
- LIST_REMOVE(aip, ai_next);
- if ((freefrag = aip->ai_freefrag) != NULL) {
- if (inodedep == NULL)
- add_to_worklist(&freefrag->ff_list);
- else
- WORKLIST_INSERT(&inodedep->id_bufwait,
- &freefrag->ff_list);
- }
- WORKITEM_FREE(aip, D_ALLOCINDIR);
-}
-
-/*
- * Directory entry addition dependencies.
- *
- * When adding a new directory entry, the inode (with its incremented link
- * count) must be written to disk before the directory entry's pointer to it.
- * Also, if the inode is newly allocated, the corresponding freemap must be
- * updated (on disk) before the directory entry's pointer. These requirements
- * are met via undo/redo on the directory entry's pointer, which consists
- * simply of the inode number.
- *
- * As directory entries are added and deleted, the free space within a
- * directory block can become fragmented. The ufs file system will compact
- * a fragmented directory block to make space for a new entry. When this
- * occurs, the offsets of previously added entries change. Any "diradd"
- * dependency structures corresponding to these entries must be updated with
- * the new offsets.
- */
-
-/*
- * This routine is called after the in-memory inode's link
- * count has been incremented, but before the directory entry's
- * pointer to the inode has been set.
- */
-/* buffer containing directory block */
-/* inode for directory */
-/* offset of new entry in directory */
-/* inode referenced by new directory entry */
-/* non-NULL => contents of new mkdir */
-/* entry is in a newly allocated block */
-int
-softdep_setup_directory_add(struct buf *bp, struct inode *dp, off_t diroffset,
- long newinum, struct buf *newdirbp, int isnewblk)
-{
- int offset; /* offset of new entry within directory block */
- daddr_t lbn; /* block in directory containing new entry */
- struct fs *fs;
- struct diradd *dap;
- struct allocdirect *adp;
- struct pagedep *pagedep;
- struct inodedep *inodedep;
- struct newdirblk *newdirblk = NULL;
- struct mkdir *mkdir1, *mkdir2;
-
-
- fs = dp->i_fs;
- lbn = lblkno(fs, diroffset);
- offset = blkoff(fs, diroffset);
- dap = pool_get(&diradd_pool, PR_WAITOK | PR_ZERO);
- dap->da_list.wk_type = D_DIRADD;
- dap->da_offset = offset;
- dap->da_newinum = newinum;
- dap->da_state = ATTACHED;
- if (isnewblk && lbn < NDADDR && fragoff(fs, diroffset) == 0) {
- newdirblk = pool_get(&newdirblk_pool, PR_WAITOK);
- newdirblk->db_list.wk_type = D_NEWDIRBLK;
- newdirblk->db_state = 0;
- }
- if (newdirbp == NULL) {
- dap->da_state |= DEPCOMPLETE;
- ACQUIRE_LOCK(&lk);
- } else {
- dap->da_state |= MKDIR_BODY | MKDIR_PARENT;
- mkdir1 = pool_get(&mkdir_pool, PR_WAITOK);
- mkdir1->md_list.wk_type = D_MKDIR;
- mkdir1->md_state = MKDIR_BODY;
- mkdir1->md_diradd = dap;
- mkdir2 = pool_get(&mkdir_pool, PR_WAITOK);
- mkdir2->md_list.wk_type = D_MKDIR;
- mkdir2->md_state = MKDIR_PARENT;
- mkdir2->md_diradd = dap;
- /*
- * Dependency on "." and ".." being written to disk.
- */
- mkdir1->md_buf = newdirbp;
- ACQUIRE_LOCK(&lk);
- LIST_INSERT_HEAD(&mkdirlisthd, mkdir1, md_mkdirs);
- WORKLIST_INSERT(&newdirbp->b_dep, &mkdir1->md_list);
- FREE_LOCK(&lk);
- bdwrite(newdirbp);
- /*
- * Dependency on link count increase for parent directory
- */
- ACQUIRE_LOCK(&lk);
- if (inodedep_lookup(fs, dp->i_number, 0, &inodedep) == 0
- || (inodedep->id_state & ALLCOMPLETE) == ALLCOMPLETE) {
- dap->da_state &= ~MKDIR_PARENT;
- WORKITEM_FREE(mkdir2, D_MKDIR);
- } else {
- LIST_INSERT_HEAD(&mkdirlisthd, mkdir2, md_mkdirs);
- WORKLIST_INSERT(&inodedep->id_bufwait,&mkdir2->md_list);
- }
- }
- /*
- * Link into parent directory pagedep to await its being written.
- */
- if (pagedep_lookup(dp, lbn, DEPALLOC, &pagedep) == 0)
- WORKLIST_INSERT(&bp->b_dep, &pagedep->pd_list);
- dap->da_pagedep = pagedep;
- LIST_INSERT_HEAD(&pagedep->pd_diraddhd[DIRADDHASH(offset)], dap,
- da_pdlist);
- /*
- * Link into its inodedep. Put it on the id_bufwait list if the inode
- * is not yet written. If it is written, do the post-inode write
- * processing to put it on the id_pendinghd list.
- */
- (void) inodedep_lookup(fs, newinum, DEPALLOC, &inodedep);
- if ((inodedep->id_state & ALLCOMPLETE) == ALLCOMPLETE)
- diradd_inode_written(dap, inodedep);
- else
- WORKLIST_INSERT(&inodedep->id_bufwait, &dap->da_list);
- if (isnewblk) {
- /*
- * Directories growing into indirect blocks are rare
- * enough and the frequency of new block allocation
- * in those cases even more rare, that we choose not
- * to bother tracking them. Rather we simply force the
- * new directory entry to disk.
- */
- if (lbn >= NDADDR) {
- FREE_LOCK(&lk);
- /*
- * We only have a new allocation when at the
- * beginning of a new block, not when we are
- * expanding into an existing block.
- */
- if (blkoff(fs, diroffset) == 0)
- return (1);
- return (0);
- }
- /*
- * We only have a new allocation when at the beginning
- * of a new fragment, not when we are expanding into an
- * existing fragment. Also, there is nothing to do if we
- * are already tracking this block.
- */
- if (fragoff(fs, diroffset) != 0) {
- FREE_LOCK(&lk);
- return (0);
- }
-
- if ((pagedep->pd_state & NEWBLOCK) != 0) {
- WORKITEM_FREE(newdirblk, D_NEWDIRBLK);
- FREE_LOCK(&lk);
- return (0);
- }
- /*
- * Find our associated allocdirect and have it track us.
- */
- if (inodedep_lookup(fs, dp->i_number, 0, &inodedep) == 0)
- panic("softdep_setup_directory_add: lost inodedep");
- adp = TAILQ_LAST(&inodedep->id_newinoupdt, allocdirectlst);
- if (adp == NULL || adp->ad_lbn != lbn) {
- FREE_LOCK(&lk);
- panic("softdep_setup_directory_add: lost entry");
- }
- pagedep->pd_state |= NEWBLOCK;
- newdirblk->db_pagedep = pagedep;
- WORKLIST_INSERT(&adp->ad_newdirblk, &newdirblk->db_list);
- }
- FREE_LOCK(&lk);
- return (0);
-}
-
-/*
- * This procedure is called to change the offset of a directory
- * entry when compacting a directory block which must be owned
- * exclusively by the caller. Note that the actual entry movement
- * must be done in this procedure to ensure that no I/O completions
- * occur while the move is in progress.
- */
-/* inode for directory */
-/* address of dp->i_offset */
-/* address of old directory location */
-/* address of new directory location */
-/* size of directory entry */
-void
-softdep_change_directoryentry_offset(struct inode *dp, caddr_t base,
- caddr_t oldloc, caddr_t newloc, int entrysize)
-{
- int offset, oldoffset, newoffset;
- struct pagedep *pagedep;
- struct diradd *dap;
- daddr_t lbn;
-
- ACQUIRE_LOCK(&lk);
- lbn = lblkno(dp->i_fs, dp->i_offset);
- offset = blkoff(dp->i_fs, dp->i_offset);
- if (pagedep_lookup(dp, lbn, 0, &pagedep) == 0)
- goto done;
- oldoffset = offset + (oldloc - base);
- newoffset = offset + (newloc - base);
-
- LIST_FOREACH(dap, &pagedep->pd_diraddhd[DIRADDHASH(oldoffset)], da_pdlist) {
- if (dap->da_offset != oldoffset)
- continue;
- dap->da_offset = newoffset;
- if (DIRADDHASH(newoffset) == DIRADDHASH(oldoffset))
- break;
- LIST_REMOVE(dap, da_pdlist);
- LIST_INSERT_HEAD(&pagedep->pd_diraddhd[DIRADDHASH(newoffset)],
- dap, da_pdlist);
- break;
- }
- if (dap == NULL) {
-
- LIST_FOREACH(dap, &pagedep->pd_pendinghd, da_pdlist) {
- if (dap->da_offset == oldoffset) {
- dap->da_offset = newoffset;
- break;
- }
- }
- }
-done:
- memmove(newloc, oldloc, entrysize);
- FREE_LOCK(&lk);
-}
-
-/*
- * Free a diradd dependency structure. This routine must be called
- * with splbio interrupts blocked.
- */
-STATIC void
-free_diradd(struct diradd *dap)
-{
- struct dirrem *dirrem;
- struct pagedep *pagedep;
- struct inodedep *inodedep;
- struct mkdir *mkdir, *nextmd;
-
- splassert(IPL_BIO);
-
-#ifdef DEBUG
- if (lk.lkt_held == -1)
- panic("free_diradd: lock not held");
-#endif
- WORKLIST_REMOVE(&dap->da_list);
- LIST_REMOVE(dap, da_pdlist);
- if ((dap->da_state & DIRCHG) == 0) {
- pagedep = dap->da_pagedep;
- } else {
- dirrem = dap->da_previous;
- pagedep = dirrem->dm_pagedep;
- dirrem->dm_dirinum = pagedep->pd_ino;
- add_to_worklist(&dirrem->dm_list);
- }
- if (inodedep_lookup(VFSTOUFS(pagedep->pd_mnt)->um_fs, dap->da_newinum,
- 0, &inodedep) != 0)
- (void) free_inodedep(inodedep);
- if ((dap->da_state & (MKDIR_PARENT | MKDIR_BODY)) != 0) {
- for (mkdir = LIST_FIRST(&mkdirlisthd); mkdir; mkdir = nextmd) {
- nextmd = LIST_NEXT(mkdir, md_mkdirs);
- if (mkdir->md_diradd != dap)
- continue;
- dap->da_state &= ~mkdir->md_state;
- WORKLIST_REMOVE(&mkdir->md_list);
- LIST_REMOVE(mkdir, md_mkdirs);
- WORKITEM_FREE(mkdir, D_MKDIR);
- }
- if ((dap->da_state & (MKDIR_PARENT | MKDIR_BODY)) != 0) {
- FREE_LOCK(&lk);
- panic("free_diradd: unfound ref");
- }
- }
- WORKITEM_FREE(dap, D_DIRADD);
-}
-
-/*
- * Directory entry removal dependencies.
- *
- * When removing a directory entry, the entry's inode pointer must be
- * zero'ed on disk before the corresponding inode's link count is decremented
- * (possibly freeing the inode for re-use). This dependency is handled by
- * updating the directory entry but delaying the inode count reduction until
- * after the directory block has been written to disk. After this point, the
- * inode count can be decremented whenever it is convenient.
- */
-
-/*
- * This routine should be called immediately after removing
- * a directory entry. The inode's link count should not be
- * decremented by the calling procedure -- the soft updates
- * code will do this task when it is safe.
- */
-/* buffer containing directory block */
-/* inode for the directory being modified */
-/* inode for directory entry being removed */
-/* indicates if doing RMDIR */
-void
-softdep_setup_remove(struct buf *bp, struct inode *dp, struct inode *ip,
- int isrmdir)
-{
- struct dirrem *dirrem, *prevdirrem;
-
- /*
- * Allocate a new dirrem if appropriate and ACQUIRE_LOCK.
- */
- dirrem = newdirrem(bp, dp, ip, isrmdir, &prevdirrem);
-
- /*
- * If the COMPLETE flag is clear, then there were no active
- * entries and we want to roll back to a zeroed entry until
- * the new inode is committed to disk. If the COMPLETE flag is
- * set then we have deleted an entry that never made it to
- * disk. If the entry we deleted resulted from a name change,
- * then the old name still resides on disk. We cannot delete
- * its inode (returned to us in prevdirrem) until the zeroed
- * directory entry gets to disk. The new inode has never been
- * referenced on the disk, so can be deleted immediately.
- */
- if ((dirrem->dm_state & COMPLETE) == 0) {
- LIST_INSERT_HEAD(&dirrem->dm_pagedep->pd_dirremhd, dirrem,
- dm_next);
- FREE_LOCK(&lk);
- } else {
- if (prevdirrem != NULL)
- LIST_INSERT_HEAD(&dirrem->dm_pagedep->pd_dirremhd,
- prevdirrem, dm_next);
- dirrem->dm_dirinum = dirrem->dm_pagedep->pd_ino;
- FREE_LOCK(&lk);
- handle_workitem_remove(dirrem);
- }
-}
-
-STATIC long num_dirrem; /* number of dirrem allocated */
-/*
- * Allocate a new dirrem if appropriate and return it along with
- * its associated pagedep. Called without a lock, returns with lock.
- */
-/* buffer containing directory block */
-/* inode for the directory being modified */
-/* inode for directory entry being removed */
-/* indicates if doing RMDIR */
-/* previously referenced inode, if any */
-STATIC struct dirrem *
-newdirrem(struct buf *bp, struct inode *dp, struct inode *ip, int isrmdir,
- struct dirrem **prevdirremp)
-{
- int offset;
- daddr_t lbn;
- struct diradd *dap;
- struct dirrem *dirrem;
- struct pagedep *pagedep;
-
- /*
- * Whiteouts have no deletion dependencies.
- */
- if (ip == NULL)
- panic("newdirrem: whiteout");
- /*
- * If we are over our limit, try to improve the situation.
- * Limiting the number of dirrem structures will also limit
- * the number of freefile and freeblks structures.
- */
- if (num_dirrem > max_softdeps / 2)
- (void) request_cleanup(FLUSH_REMOVE, 0);
- num_dirrem += 1;
- dirrem = pool_get(&dirrem_pool, PR_WAITOK | PR_ZERO);
- dirrem->dm_list.wk_type = D_DIRREM;
- dirrem->dm_state = isrmdir ? RMDIR : 0;
- dirrem->dm_mnt = ITOV(ip)->v_mount;
- dirrem->dm_oldinum = ip->i_number;
- *prevdirremp = NULL;
-
- ACQUIRE_LOCK(&lk);
- lbn = lblkno(dp->i_fs, dp->i_offset);
- offset = blkoff(dp->i_fs, dp->i_offset);
- if (pagedep_lookup(dp, lbn, DEPALLOC, &pagedep) == 0)
- WORKLIST_INSERT(&bp->b_dep, &pagedep->pd_list);
- dirrem->dm_pagedep = pagedep;
- /*
- * Check for a diradd dependency for the same directory entry.
- * If present, then both dependencies become obsolete and can
- * be de-allocated. Check for an entry on both the pd_dirraddhd
- * list and the pd_pendinghd list.
- */
-
- LIST_FOREACH(dap, &pagedep->pd_diraddhd[DIRADDHASH(offset)], da_pdlist)
- if (dap->da_offset == offset)
- break;
- if (dap == NULL) {
-
- LIST_FOREACH(dap, &pagedep->pd_pendinghd, da_pdlist)
- if (dap->da_offset == offset)
- break;
- if (dap == NULL)
- return (dirrem);
- }
- /*
- * Must be ATTACHED at this point.
- */
- if ((dap->da_state & ATTACHED) == 0) {
- FREE_LOCK(&lk);
- panic("newdirrem: not ATTACHED");
- }
- if (dap->da_newinum != ip->i_number) {
- FREE_LOCK(&lk);
- panic("newdirrem: inum %u should be %u",
- ip->i_number, dap->da_newinum);
- }
- /*
- * If we are deleting a changed name that never made it to disk,
- * then return the dirrem describing the previous inode (which
- * represents the inode currently referenced from this entry on disk).
- */
- if ((dap->da_state & DIRCHG) != 0) {
- *prevdirremp = dap->da_previous;
- dap->da_state &= ~DIRCHG;
- dap->da_pagedep = pagedep;
- }
- /*
- * We are deleting an entry that never made it to disk.
- * Mark it COMPLETE so we can delete its inode immediately.
- */
- dirrem->dm_state |= COMPLETE;
- free_diradd(dap);
- return (dirrem);
-}
-
-/*
- * Directory entry change dependencies.
- *
- * Changing an existing directory entry requires that an add operation
- * be completed first followed by a deletion. The semantics for the addition
- * are identical to the description of adding a new entry above except
- * that the rollback is to the old inode number rather than zero. Once
- * the addition dependency is completed, the removal is done as described
- * in the removal routine above.
- */
-
-/*
- * This routine should be called immediately after changing
- * a directory entry. The inode's link count should not be
- * decremented by the calling procedure -- the soft updates
- * code will perform this task when it is safe.
- */
-/* buffer containing directory block */
-/* inode for the directory being modified */
-/* inode for directory entry being removed */
-/* new inode number for changed entry */
-/* indicates if doing RMDIR */
-void
-softdep_setup_directory_change(struct buf *bp, struct inode *dp,
- struct inode *ip, long newinum, int isrmdir)
-{
- int offset;
- struct diradd *dap;
- struct dirrem *dirrem, *prevdirrem;
- struct pagedep *pagedep;
- struct inodedep *inodedep;
-
- offset = blkoff(dp->i_fs, dp->i_offset);
- dap = pool_get(&diradd_pool, PR_WAITOK | PR_ZERO);
- dap->da_list.wk_type = D_DIRADD;
- dap->da_state = DIRCHG | ATTACHED | DEPCOMPLETE;
- dap->da_offset = offset;
- dap->da_newinum = newinum;
-
- /*
- * Allocate a new dirrem and ACQUIRE_LOCK.
- */
- dirrem = newdirrem(bp, dp, ip, isrmdir, &prevdirrem);
- pagedep = dirrem->dm_pagedep;
- /*
- * The possible values for isrmdir:
- * 0 - non-directory file rename
- * 1 - directory rename within same directory
- * inum - directory rename to new directory of given inode number
- * When renaming to a new directory, we are both deleting and
- * creating a new directory entry, so the link count on the new
- * directory should not change. Thus we do not need the followup
- * dirrem which is usually done in handle_workitem_remove. We set
- * the DIRCHG flag to tell handle_workitem_remove to skip the
- * followup dirrem.
- */
- if (isrmdir > 1)
- dirrem->dm_state |= DIRCHG;
-
- /*
- * If the COMPLETE flag is clear, then there were no active
- * entries and we want to roll back to the previous inode until
- * the new inode is committed to disk. If the COMPLETE flag is
- * set, then we have deleted an entry that never made it to disk.
- * If the entry we deleted resulted from a name change, then the old
- * inode reference still resides on disk. Any rollback that we do
- * needs to be to that old inode (returned to us in prevdirrem). If
- * the entry we deleted resulted from a create, then there is
- * no entry on the disk, so we want to roll back to zero rather
- * than the uncommitted inode. In either of the COMPLETE cases we
- * want to immediately free the unwritten and unreferenced inode.
- */
- if ((dirrem->dm_state & COMPLETE) == 0) {
- dap->da_previous = dirrem;
- } else {
- if (prevdirrem != NULL) {
- dap->da_previous = prevdirrem;
- } else {
- dap->da_state &= ~DIRCHG;
- dap->da_pagedep = pagedep;
- }
- dirrem->dm_dirinum = pagedep->pd_ino;
- add_to_worklist(&dirrem->dm_list);
- }
- /*
- * Link into its inodedep. Put it on the id_bufwait list if the inode
- * is not yet written. If it is written, do the post-inode write
- * processing to put it on the id_pendinghd list.
- */
- if (inodedep_lookup(dp->i_fs, newinum, DEPALLOC, &inodedep) == 0 ||
- (inodedep->id_state & ALLCOMPLETE) == ALLCOMPLETE) {
- dap->da_state |= COMPLETE;
- LIST_INSERT_HEAD(&pagedep->pd_pendinghd, dap, da_pdlist);
- WORKLIST_INSERT(&inodedep->id_pendinghd, &dap->da_list);
- } else {
- LIST_INSERT_HEAD(&pagedep->pd_diraddhd[DIRADDHASH(offset)],
- dap, da_pdlist);
- WORKLIST_INSERT(&inodedep->id_bufwait, &dap->da_list);
- }
- FREE_LOCK(&lk);
-}
-
-/*
- * Called whenever the link count on an inode is changed.
- * It creates an inode dependency so that the new reference(s)
- * to the inode cannot be committed to disk until the updated
- * inode has been written.
- */
-/* the inode with the increased link count */
-/* do background work or not */
-void
-softdep_change_linkcnt(struct inode *ip, int nodelay)
-{
- struct inodedep *inodedep;
- int flags;
-
- /*
- * If requested, do not allow background work to happen.
- */
- flags = DEPALLOC;
- if (nodelay)
- flags |= NODELAY;
-
- ACQUIRE_LOCK(&lk);
-
- (void) inodedep_lookup(ip->i_fs, ip->i_number, flags, &inodedep);
- if (DIP(ip, nlink) < ip->i_effnlink) {
- FREE_LOCK(&lk);
- panic("softdep_change_linkcnt: bad delta");
- }
-
- inodedep->id_nlinkdelta = DIP(ip, nlink) - ip->i_effnlink;
-
- FREE_LOCK(&lk);
-}
-
-/*
- * This workitem decrements the inode's link count.
- * If the link count reaches zero, the file is removed.
- */
-STATIC void
-handle_workitem_remove(struct dirrem *dirrem)
-{
- struct proc *p = CURPROC; /* XXX */
- struct inodedep *inodedep;
- struct vnode *vp;
- struct inode *ip;
- ufsino_t oldinum;
- int error;
-
- if ((error = VFS_VGET(dirrem->dm_mnt, dirrem->dm_oldinum, &vp)) != 0) {
- softdep_error("handle_workitem_remove: vget", error);
- return;
- }
- ip = VTOI(vp);
- ACQUIRE_LOCK(&lk);
- if ((inodedep_lookup(ip->i_fs, dirrem->dm_oldinum, 0, &inodedep))
- == 0) {
- FREE_LOCK(&lk);
- panic("handle_workitem_remove: lost inodedep");
- }
- /*
- * Normal file deletion.
- */
- if ((dirrem->dm_state & RMDIR) == 0) {
- DIP_ADD(ip, nlink, -1);
- ip->i_flag |= IN_CHANGE;
- if (DIP(ip, nlink) < ip->i_effnlink) {
- FREE_LOCK(&lk);
- panic("handle_workitem_remove: bad file delta");
- }
- inodedep->id_nlinkdelta = DIP(ip, nlink) - ip->i_effnlink;
- FREE_LOCK(&lk);
- vput(vp);
- num_dirrem -= 1;
- WORKITEM_FREE(dirrem, D_DIRREM);
- return;
- }
- /*
- * Directory deletion. Decrement reference count for both the
- * just deleted parent directory entry and the reference for ".".
- * Next truncate the directory to length zero. When the
- * truncation completes, arrange to have the reference count on
- * the parent decremented to account for the loss of "..".
- */
- DIP_ADD(ip, nlink, -2);
- ip->i_flag |= IN_CHANGE;
- if (DIP(ip, nlink) < ip->i_effnlink)
- panic("handle_workitem_remove: bad dir delta");
- inodedep->id_nlinkdelta = DIP(ip, nlink) - ip->i_effnlink;
- FREE_LOCK(&lk);
- if ((error = UFS_TRUNCATE(ip, (off_t)0, 0, p->p_ucred)) != 0)
- softdep_error("handle_workitem_remove: truncate", error);
- /*
- * Rename a directory to a new parent. Since, we are both deleting
- * and creating a new directory entry, the link count on the new
- * directory should not change. Thus we skip the followup dirrem.
- */
- if (dirrem->dm_state & DIRCHG) {
- vput(vp);
- num_dirrem -= 1;
- WORKITEM_FREE(dirrem, D_DIRREM);
- return;
- }
- /*
- * If the inodedep does not exist, then the zero'ed inode has
- * been written to disk. If the allocated inode has never been
- * written to disk, then the on-disk inode is zero'ed. In either
- * case we can remove the file immediately.
- */
- ACQUIRE_LOCK(&lk);
- dirrem->dm_state = 0;
- oldinum = dirrem->dm_oldinum;
- dirrem->dm_oldinum = dirrem->dm_dirinum;
- if (inodedep_lookup(ip->i_fs, oldinum, 0, &inodedep) == 0 ||
- check_inode_unwritten(inodedep)) {
- FREE_LOCK(&lk);
- vput(vp);
- handle_workitem_remove(dirrem);
- return;
- }
- WORKLIST_INSERT(&inodedep->id_inowait, &dirrem->dm_list);
- FREE_LOCK(&lk);
- ip->i_flag |= IN_CHANGE;
- UFS_UPDATE(VTOI(vp), 0);
- vput(vp);
-}
-
-/*
- * Inode de-allocation dependencies.
- *
- * When an inode's link count is reduced to zero, it can be de-allocated. We
- * found it convenient to postpone de-allocation until after the inode is
- * written to disk with its new link count (zero). At this point, all of the
- * on-disk inode's block pointers are nullified and, with careful dependency
- * list ordering, all dependencies related to the inode will be satisfied and
- * the corresponding dependency structures de-allocated. So, if/when the
- * inode is reused, there will be no mixing of old dependencies with new
- * ones. This artificial dependency is set up by the block de-allocation
- * procedure above (softdep_setup_freeblocks) and completed by the
- * following procedure.
- */
-STATIC void
-handle_workitem_freefile(struct freefile *freefile)
-{
- struct fs *fs;
- struct vnode vp;
- struct inode tip;
-#ifdef DEBUG
- struct inodedep *idp;
-#endif
- int error;
-
- fs = VFSTOUFS(freefile->fx_mnt)->um_fs;
-#ifdef DEBUG
- ACQUIRE_LOCK(&lk);
- error = inodedep_lookup(fs, freefile->fx_oldinum, 0, &idp);
- FREE_LOCK(&lk);
- if (error)
- panic("handle_workitem_freefile: inodedep survived");
-#endif
- tip.i_ump = VFSTOUFS(freefile->fx_mnt);
- tip.i_dev = freefile->fx_devvp->v_rdev;
- tip.i_fs = fs;
- tip.i_vnode = &vp;
- vp.v_data = &tip;
-
- if ((error = ffs_freefile(&tip, freefile->fx_oldinum,
- freefile->fx_mode)) != 0) {
- softdep_error("handle_workitem_freefile", error);
- }
- WORKITEM_FREE(freefile, D_FREEFILE);
-}
-
-/*
- * Disk writes.
- *
- * The dependency structures constructed above are most actively used when file
- * system blocks are written to disk. No constraints are placed on when a
- * block can be written, but unsatisfied update dependencies are made safe by
- * modifying (or replacing) the source memory for the duration of the disk
- * write. When the disk write completes, the memory block is again brought
- * up-to-date.
- *
- * In-core inode structure reclamation.
- *
- * Because there are a finite number of "in-core" inode structures, they are
- * reused regularly. By transferring all inode-related dependencies to the
- * in-memory inode block and indexing them separately (via "inodedep"s), we
- * can allow "in-core" inode structures to be reused at any time and avoid
- * any increase in contention.
- *
- * Called just before entering the device driver to initiate a new disk I/O.
- * The buffer must be locked, thus, no I/O completion operations can occur
- * while we are manipulating its associated dependencies.
- */
-/* structure describing disk write to occur */
-void
-softdep_disk_io_initiation(struct buf *bp)
-{
- struct worklist *wk, *nextwk;
- struct indirdep *indirdep;
- struct inodedep *inodedep;
- struct buf *sbp;
-
- /*
- * We only care about write operations. There should never
- * be dependencies for reads.
- */
- if (bp->b_flags & B_READ)
- panic("softdep_disk_io_initiation: read");
-
- ACQUIRE_LOCK(&lk);
-
- /*
- * Do any necessary pre-I/O processing.
- */
- for (wk = LIST_FIRST(&bp->b_dep); wk; wk = nextwk) {
- nextwk = LIST_NEXT(wk, wk_list);
- switch (wk->wk_type) {
-
- case D_PAGEDEP:
- initiate_write_filepage(WK_PAGEDEP(wk), bp);
- continue;
-
- case D_INODEDEP:
- inodedep = WK_INODEDEP(wk);
- if (inodedep->id_fs->fs_magic == FS_UFS1_MAGIC)
- initiate_write_inodeblock_ufs1(inodedep, bp);
-#ifdef FFS2
- else
- initiate_write_inodeblock_ufs2(inodedep, bp);
-#endif
- continue;
-
- case D_INDIRDEP:
- indirdep = WK_INDIRDEP(wk);
- if (indirdep->ir_state & GOINGAWAY)
- panic("disk_io_initiation: indirdep gone");
- /*
- * If there are no remaining dependencies, this
- * will be writing the real pointers, so the
- * dependency can be freed.
- */
- if (LIST_FIRST(&indirdep->ir_deplisthd) == NULL) {
- sbp = indirdep->ir_savebp;
- sbp->b_flags |= B_INVAL | B_NOCACHE;
- /* inline expand WORKLIST_REMOVE(wk); */
- wk->wk_state &= ~ONWORKLIST;
- LIST_REMOVE(wk, wk_list);
- WORKITEM_FREE(indirdep, D_INDIRDEP);
- FREE_LOCK(&lk);
- brelse(sbp);
- ACQUIRE_LOCK(&lk);
- continue;
- }
- /*
- * Replace up-to-date version with safe version.
- */
- FREE_LOCK(&lk);
- indirdep->ir_saveddata = malloc(bp->b_bcount,
- M_INDIRDEP, M_WAITOK);
- ACQUIRE_LOCK(&lk);
- indirdep->ir_state &= ~ATTACHED;
- indirdep->ir_state |= UNDONE;
- memcpy(indirdep->ir_saveddata, bp->b_data, bp->b_bcount);
- memcpy(bp->b_data, indirdep->ir_savebp->b_data,
- bp->b_bcount);
- continue;
-
- case D_MKDIR:
- case D_BMSAFEMAP:
- case D_ALLOCDIRECT:
- case D_ALLOCINDIR:
- continue;
-
- default:
- FREE_LOCK(&lk);
- panic("handle_disk_io_initiation: Unexpected type %s",
- TYPENAME(wk->wk_type));
- /* NOTREACHED */
- }
- }
-
- FREE_LOCK(&lk);
-}
-
-/*
- * Called from within the procedure above to deal with unsatisfied
- * allocation dependencies in a directory. The buffer must be locked,
- * thus, no I/O completion operations can occur while we are
- * manipulating its associated dependencies.
- */
-STATIC void
-initiate_write_filepage(struct pagedep *pagedep, struct buf *bp)
-{
- struct diradd *dap;
- struct direct *ep;
- int i;
-
- if (pagedep->pd_state & IOSTARTED) {
- /*
- * This can only happen if there is a driver that does not
- * understand chaining. Here biodone will reissue the call
- * to strategy for the incomplete buffers.
- */
- printf("initiate_write_filepage: already started\n");
- return;
- }
- pagedep->pd_state |= IOSTARTED;
- for (i = 0; i < DAHASHSZ; i++) {
- LIST_FOREACH(dap, &pagedep->pd_diraddhd[i], da_pdlist) {
- ep = (struct direct *)
- ((char *)bp->b_data + dap->da_offset);
- if (ep->d_ino != dap->da_newinum) {
- FREE_LOCK(&lk);
- panic("%s: dir inum %u != new %u",
- "initiate_write_filepage",
- ep->d_ino, dap->da_newinum);
- }
- if (dap->da_state & DIRCHG)
- ep->d_ino = dap->da_previous->dm_oldinum;
- else
- ep->d_ino = 0;
- dap->da_state &= ~ATTACHED;
- dap->da_state |= UNDONE;
- }
- }
-}
-
-/*
- * Called from within the procedure above to deal with unsatisfied
- * allocation dependencies in an inodeblock. The buffer must be
- * locked, thus, no I/O completion operations can occur while we
- * are manipulating its associated dependencies.
- */
-/* The inode block */
-STATIC void
-initiate_write_inodeblock_ufs1(struct inodedep *inodedep, struct buf *bp)
-{
- struct allocdirect *adp, *lastadp;
- struct ufs1_dinode *dp;
- struct fs *fs;
-#ifdef DIAGNOSTIC
- daddr_t prevlbn = 0;
- int32_t d1, d2;
-#endif
- int i, deplist;
-
- if (inodedep->id_state & IOSTARTED) {
- FREE_LOCK(&lk);
- panic("initiate_write_inodeblock: already started");
- }
- inodedep->id_state |= IOSTARTED;
- fs = inodedep->id_fs;
- dp = (struct ufs1_dinode *)bp->b_data +
- ino_to_fsbo(fs, inodedep->id_ino);
- /*
- * If the bitmap is not yet written, then the allocated
- * inode cannot be written to disk.
- */
- if ((inodedep->id_state & DEPCOMPLETE) == 0) {
- if (inodedep->id_savedino1 != NULL) {
- FREE_LOCK(&lk);
- panic("initiate_write_inodeblock: already doing I/O");
- }
- FREE_LOCK(&lk);
- inodedep->id_savedino1 = malloc(sizeof(struct ufs1_dinode),
- M_INODEDEP, M_WAITOK);
- inodedep->id_unsize = sizeof(struct ufs1_dinode);
- ACQUIRE_LOCK(&lk);
- *inodedep->id_savedino1 = *dp;
- memset(dp, 0, sizeof(struct ufs1_dinode));
- return;
- }
- /*
- * If no dependencies, then there is nothing to roll back.
- */
- inodedep->id_savedsize = dp->di_size;
- if (TAILQ_FIRST(&inodedep->id_inoupdt) == NULL)
- return;
- /*
- * Set the dependencies to busy.
- */
- for (deplist = 0, adp = TAILQ_FIRST(&inodedep->id_inoupdt); adp;
- adp = TAILQ_NEXT(adp, ad_next)) {
-#ifdef DIAGNOSTIC
- if (deplist != 0 && prevlbn >= adp->ad_lbn) {
- FREE_LOCK(&lk);
- panic("softdep_write_inodeblock: lbn order");
- }
- prevlbn = adp->ad_lbn;
- if (adp->ad_lbn < NDADDR &&
- (d1 = dp->di_db[adp->ad_lbn]) != (d2 = adp->ad_newblkno)) {
- FREE_LOCK(&lk);
- panic("%s: direct pointer #%lld mismatch %d != %d",
- "softdep_write_inodeblock", (long long)adp->ad_lbn,
- d1, d2);
- }
- if (adp->ad_lbn >= NDADDR &&
- (d1 = dp->di_ib[adp->ad_lbn - NDADDR]) !=
- (d2 = adp->ad_newblkno)) {
- FREE_LOCK(&lk);
- panic("%s: indirect pointer #%lld mismatch %d != %d",
- "softdep_write_inodeblock", (long long)(adp->ad_lbn -
- NDADDR), d1, d2);
- }
- deplist |= 1 << adp->ad_lbn;
- if ((adp->ad_state & ATTACHED) == 0) {
- FREE_LOCK(&lk);
- panic("softdep_write_inodeblock: Unknown state 0x%x",
- adp->ad_state);
- }
-#endif /* DIAGNOSTIC */
- adp->ad_state &= ~ATTACHED;
- adp->ad_state |= UNDONE;
- }
- /*
- * The on-disk inode cannot claim to be any larger than the last
- * fragment that has been written. Otherwise, the on-disk inode
- * might have fragments that were not the last block in the file
- * which would corrupt the filesystem.
- */
- for (lastadp = NULL, adp = TAILQ_FIRST(&inodedep->id_inoupdt); adp;
- lastadp = adp, adp = TAILQ_NEXT(adp, ad_next)) {
- if (adp->ad_lbn >= NDADDR)
- break;
- dp->di_db[adp->ad_lbn] = adp->ad_oldblkno;
- /* keep going until hitting a rollback to a frag */
- if (adp->ad_oldsize == 0 || adp->ad_oldsize == fs->fs_bsize)
- continue;
- dp->di_size = fs->fs_bsize * adp->ad_lbn + adp->ad_oldsize;
- for (i = adp->ad_lbn + 1; i < NDADDR; i++) {
-#ifdef DIAGNOSTIC
- if (dp->di_db[i] != 0 && (deplist & (1 << i)) == 0) {
- FREE_LOCK(&lk);
- panic("softdep_write_inodeblock: lost dep1");
- }
-#endif /* DIAGNOSTIC */
- dp->di_db[i] = 0;
- }
- for (i = 0; i < NIADDR; i++) {
-#ifdef DIAGNOSTIC
- if (dp->di_ib[i] != 0 &&
- (deplist & ((1 << NDADDR) << i)) == 0) {
- FREE_LOCK(&lk);
- panic("softdep_write_inodeblock: lost dep2");
- }
-#endif /* DIAGNOSTIC */
- dp->di_ib[i] = 0;
- }
- return;
- }
- /*
- * If we have zero'ed out the last allocated block of the file,
- * roll back the size to the last currently allocated block.
- * We know that this last allocated block is a full-sized as
- * we already checked for fragments in the loop above.
- */
- if (lastadp != NULL &&
- dp->di_size <= (lastadp->ad_lbn + 1) * fs->fs_bsize) {
- for (i = lastadp->ad_lbn; i >= 0; i--)
- if (dp->di_db[i] != 0)
- break;
- dp->di_size = (i + 1) * fs->fs_bsize;
- }
- /*
- * The only dependencies are for indirect blocks.
- *
- * The file size for indirect block additions is not guaranteed.
- * Such a guarantee would be non-trivial to achieve. The conventional
- * synchronous write implementation also does not make this guarantee.
- * Fsck should catch and fix discrepancies. Arguably, the file size
- * can be over-estimated without destroying integrity when the file
- * moves into the indirect blocks (i.e., is large). If we want to
- * postpone fsck, we are stuck with this argument.
- */
- for (; adp; adp = TAILQ_NEXT(adp, ad_next))
- dp->di_ib[adp->ad_lbn - NDADDR] = 0;
-}
-
-#ifdef FFS2
-/*
- * Version of initiate_write_inodeblock that handles FFS2 dinodes.
- */
-/* The inode block */
-STATIC void
-initiate_write_inodeblock_ufs2(struct inodedep *inodedep, struct buf *bp)
-{
- struct allocdirect *adp, *lastadp;
- struct ufs2_dinode *dp;
- struct fs *fs = inodedep->id_fs;
-#ifdef DIAGNOSTIC
- daddr_t prevlbn = -1, d1, d2;
-#endif
- int deplist, i;
-
- if (inodedep->id_state & IOSTARTED)
- panic("initiate_write_inodeblock_ufs2: already started");
- inodedep->id_state |= IOSTARTED;
- fs = inodedep->id_fs;
- dp = (struct ufs2_dinode *)bp->b_data +
- ino_to_fsbo(fs, inodedep->id_ino);
- /*
- * If the bitmap is not yet written, then the allocated
- * inode cannot be written to disk.
- */
- if ((inodedep->id_state & DEPCOMPLETE) == 0) {
- if (inodedep->id_savedino2 != NULL)
- panic("initiate_write_inodeblock_ufs2: I/O underway");
- inodedep->id_savedino2 = malloc(sizeof(struct ufs2_dinode),
- M_INODEDEP, M_WAITOK);
- inodedep->id_unsize = sizeof(struct ufs2_dinode);
- *inodedep->id_savedino2 = *dp;
- memset(dp, 0, sizeof(struct ufs2_dinode));
- return;
- }
- /*
- * If no dependencies, then there is nothing to roll back.
- */
- inodedep->id_savedsize = dp->di_size;
- if (TAILQ_FIRST(&inodedep->id_inoupdt) == NULL)
- return;
-
-#ifdef notyet
- inodedep->id_savedextsize = dp->di_extsize;
- if (TAILQ_FIRST(&inodedep->id_inoupdt) == NULL &&
- TAILQ_FIRST(&inodedep->id_extupdt) == NULL)
- return;
- /*
- * Set the ext data dependencies to busy.
- */
- for (deplist = 0, adp = TAILQ_FIRST(&inodedep->id_extupdt); adp;
- adp = TAILQ_NEXT(adp, ad_next)) {
-#ifdef DIAGNOSTIC
- if (deplist != 0 && prevlbn >= adp->ad_lbn) {
- FREE_LOCK(&lk);
- panic("softdep_write_inodeblock: lbn order");
- }
- prevlbn = adp->ad_lbn;
- if ((d1 = dp->di_extb[adp->ad_lbn]) !=
- (d2 = adp->ad_newblkno)) {
- FREE_LOCK(&lk);
- panic("%s: direct pointer #%lld mismatch %lld != %lld",
- "softdep_write_inodeblock", (long long)adp->ad_lbn,
- d1, d2);
- }
- deplist |= 1 << adp->ad_lbn;
- if ((adp->ad_state & ATTACHED) == 0) {
- FREE_LOCK(&lk);
- panic("softdep_write_inodeblock: Unknown state 0x%x",
- adp->ad_state);
- }
-#endif /* DIAGNOSTIC */
- adp->ad_state &= ~ATTACHED;
- adp->ad_state |= UNDONE;
- }
- /*
- * The on-disk inode cannot claim to be any larger than the last
- * fragment that has been written. Otherwise, the on-disk inode
- * might have fragments that were not the last block in the ext
- * data which would corrupt the filesystem.
- */
- for (lastadp = NULL, adp = TAILQ_FIRST(&inodedep->id_extupdt); adp;
- lastadp = adp, adp = TAILQ_NEXT(adp, ad_next)) {
- dp->di_extb[adp->ad_lbn] = adp->ad_oldblkno;
- /* keep going until hitting a rollback to a frag */
- if (adp->ad_oldsize == 0 || adp->ad_oldsize == fs->fs_bsize)
- continue;
- dp->di_extsize = fs->fs_bsize * adp->ad_lbn + adp->ad_oldsize;
- for (i = adp->ad_lbn + 1; i < NXADDR; i++) {
-#ifdef DIAGNOSTIC
- if (dp->di_extb[i] != 0 && (deplist & (1 << i)) == 0) {
- FREE_LOCK(&lk);
- panic("softdep_write_inodeblock: lost dep1");
- }
-#endif /* DIAGNOSTIC */
- dp->di_extb[i] = 0;
- }
- lastadp = NULL;
- break;
- }
- /*
- * If we have zero'ed out the last allocated block of the ext
- * data, roll back the size to the last currently allocated block.
- * We know that this last allocated block is a full-sized as
- * we already checked for fragments in the loop above.
- */
- if (lastadp != NULL &&
- dp->di_extsize <= (lastadp->ad_lbn + 1) * fs->fs_bsize) {
- for (i = lastadp->ad_lbn; i >= 0; i--)
- if (dp->di_extb[i] != 0)
- break;
- dp->di_extsize = (i + 1) * fs->fs_bsize;
- }
-#endif /* notyet */
-
- /*
- * Set the file data dependencies to busy.
- */
- for (deplist = 0, adp = TAILQ_FIRST(&inodedep->id_inoupdt); adp;
- adp = TAILQ_NEXT(adp, ad_next)) {
-#ifdef DIAGNOSTIC
- if (deplist != 0 && prevlbn >= adp->ad_lbn) {
- FREE_LOCK(&lk);
- panic("softdep_write_inodeblock: lbn order");
- }
- prevlbn = adp->ad_lbn;
- if (adp->ad_lbn < NDADDR &&
- (d1 = dp->di_db[adp->ad_lbn]) != (d2 = adp->ad_newblkno)) {
- FREE_LOCK(&lk);
- panic("%s: direct pointer #%lld mismatch %lld != %lld",
- "softdep_write_inodeblock", (long long)adp->ad_lbn,
- d1, d2);
- }
- if (adp->ad_lbn >= NDADDR &&
- (d1 = dp->di_ib[adp->ad_lbn - NDADDR]) !=
- (d2 = adp->ad_newblkno)) {
- FREE_LOCK(&lk);
- panic("%s: indirect pointer #%lld mismatch %lld != %lld",
- "softdep_write_inodeblock", (long long)(adp->ad_lbn -
- NDADDR), d1, d2);
- }
- deplist |= 1 << adp->ad_lbn;
- if ((adp->ad_state & ATTACHED) == 0) {
- FREE_LOCK(&lk);
- panic("softdep_write_inodeblock: Unknown state 0x%x",
- adp->ad_state);
- }
-#endif /* DIAGNOSTIC */
- adp->ad_state &= ~ATTACHED;
- adp->ad_state |= UNDONE;
- }
- /*
- * The on-disk inode cannot claim to be any larger than the last
- * fragment that has been written. Otherwise, the on-disk inode
- * might have fragments that were not the last block in the file
- * which would corrupt the filesystem.
- */
- for (lastadp = NULL, adp = TAILQ_FIRST(&inodedep->id_inoupdt); adp;
- lastadp = adp, adp = TAILQ_NEXT(adp, ad_next)) {
- if (adp->ad_lbn >= NDADDR)
- break;
- dp->di_db[adp->ad_lbn] = adp->ad_oldblkno;
- /* keep going until hitting a rollback to a frag */
- if (adp->ad_oldsize == 0 || adp->ad_oldsize == fs->fs_bsize)
- continue;
- dp->di_size = fs->fs_bsize * adp->ad_lbn + adp->ad_oldsize;
- for (i = adp->ad_lbn + 1; i < NDADDR; i++) {
-#ifdef DIAGNOSTIC
- if (dp->di_db[i] != 0 && (deplist & (1 << i)) == 0) {
- FREE_LOCK(&lk);
- panic("softdep_write_inodeblock: lost dep2");
- }
-#endif /* DIAGNOSTIC */
- dp->di_db[i] = 0;
- }
- for (i = 0; i < NIADDR; i++) {
-#ifdef DIAGNOSTIC
- if (dp->di_ib[i] != 0 &&
- (deplist & ((1 << NDADDR) << i)) == 0) {
- FREE_LOCK(&lk);
- panic("softdep_write_inodeblock: lost dep3");
- }
-#endif /* DIAGNOSTIC */
- dp->di_ib[i] = 0;
- }
- return;
- }
- /*
- * If we have zero'ed out the last allocated block of the file,
- * roll back the size to the last currently allocated block.
- * We know that this last allocated block is a full-sized as
- * we already checked for fragments in the loop above.
- */
- if (lastadp != NULL &&
- dp->di_size <= (lastadp->ad_lbn + 1) * fs->fs_bsize) {
- for (i = lastadp->ad_lbn; i >= 0; i--)
- if (dp->di_db[i] != 0)
- break;
- dp->di_size = (i + 1) * fs->fs_bsize;
- }
- /*
- * The only dependencies are for indirect blocks.
- *
- * The file size for indirect block additions is not guaranteed.
- * Such a guarantee would be non-trivial to achieve. The conventional
- * synchronous write implementation also does not make this guarantee.
- * Fsck should catch and fix discrepancies. Arguably, the file size
- * can be over-estimated without destroying integrity when the file
- * moves into the indirect blocks (i.e., is large). If we want to
- * postpone fsck, we are stuck with this argument.
- */
- for (; adp; adp = TAILQ_NEXT(adp, ad_next))
- dp->di_ib[adp->ad_lbn - NDADDR] = 0;
-}
-#endif /* FFS2 */
-
-/*
- * This routine is called during the completion interrupt
- * service routine for a disk write (from the procedure called
- * by the device driver to inform the file system caches of
- * a request completion). It should be called early in this
- * procedure, before the block is made available to other
- * processes or other routines are called.
- */
-/* describes the completed disk write */
-void
-softdep_disk_write_complete(struct buf *bp)
-{
- struct worklist *wk;
- struct workhead reattach;
- struct newblk *newblk;
- struct allocindir *aip;
- struct allocdirect *adp;
- struct indirdep *indirdep;
- struct inodedep *inodedep;
- struct bmsafemap *bmsafemap;
-
- /*
- * If an error occurred while doing the write, then the data
- * has not hit the disk and the dependencies cannot be unrolled.
- */
- if ((bp->b_flags & B_ERROR) && !(bp->b_flags & B_INVAL))
- return;
-
-#ifdef DEBUG
- if (lk.lkt_held != -1)
- panic("softdep_disk_write_complete: lock is held");
- lk.lkt_held = -2;
-#endif
- LIST_INIT(&reattach);
- while ((wk = LIST_FIRST(&bp->b_dep)) != NULL) {
- WORKLIST_REMOVE(wk);
- switch (wk->wk_type) {
-
- case D_PAGEDEP:
- if (handle_written_filepage(WK_PAGEDEP(wk), bp))
- WORKLIST_INSERT(&reattach, wk);
- continue;
-
- case D_INODEDEP:
- if (handle_written_inodeblock(WK_INODEDEP(wk), bp))
- WORKLIST_INSERT(&reattach, wk);
- continue;
-
- case D_BMSAFEMAP:
- bmsafemap = WK_BMSAFEMAP(wk);
- while ((newblk = LIST_FIRST(&bmsafemap->sm_newblkhd))) {
- newblk->nb_state |= DEPCOMPLETE;
- newblk->nb_bmsafemap = NULL;
- LIST_REMOVE(newblk, nb_deps);
- }
- while ((adp =
- LIST_FIRST(&bmsafemap->sm_allocdirecthd))) {
- adp->ad_state |= DEPCOMPLETE;
- adp->ad_buf = NULL;
- LIST_REMOVE(adp, ad_deps);
- handle_allocdirect_partdone(adp);
- }
- while ((aip =
- LIST_FIRST(&bmsafemap->sm_allocindirhd))) {
- aip->ai_state |= DEPCOMPLETE;
- aip->ai_buf = NULL;
- LIST_REMOVE(aip, ai_deps);
- handle_allocindir_partdone(aip);
- }
- while ((inodedep =
- LIST_FIRST(&bmsafemap->sm_inodedephd)) != NULL) {
- inodedep->id_state |= DEPCOMPLETE;
- LIST_REMOVE(inodedep, id_deps);
- inodedep->id_buf = NULL;
- }
- WORKITEM_FREE(bmsafemap, D_BMSAFEMAP);
- continue;
-
- case D_MKDIR:
- handle_written_mkdir(WK_MKDIR(wk), MKDIR_BODY);
- continue;
-
- case D_ALLOCDIRECT:
- adp = WK_ALLOCDIRECT(wk);
- adp->ad_state |= COMPLETE;
- handle_allocdirect_partdone(adp);
- continue;
-
- case D_ALLOCINDIR:
- aip = WK_ALLOCINDIR(wk);
- aip->ai_state |= COMPLETE;
- handle_allocindir_partdone(aip);
- continue;
-
- case D_INDIRDEP:
- indirdep = WK_INDIRDEP(wk);
- if (indirdep->ir_state & GOINGAWAY)
- panic("disk_write_complete: indirdep gone");
- memcpy(bp->b_data, indirdep->ir_saveddata, bp->b_bcount);
- free(indirdep->ir_saveddata, M_INDIRDEP, bp->b_bcount);
- indirdep->ir_saveddata = NULL;
- indirdep->ir_state &= ~UNDONE;
- indirdep->ir_state |= ATTACHED;
- while ((aip = LIST_FIRST(&indirdep->ir_donehd))) {
- handle_allocindir_partdone(aip);
- if (aip == LIST_FIRST(&indirdep->ir_donehd))
- panic("disk_write_complete: not gone");
- }
- WORKLIST_INSERT(&reattach, wk);
- if ((bp->b_flags & B_DELWRI) == 0)
- stat_indir_blk_ptrs++;
- buf_dirty(bp);
- continue;
-
- default:
- panic("handle_disk_write_complete: Unknown type %s",
- TYPENAME(wk->wk_type));
- /* NOTREACHED */
- }
- }
- /*
- * Reattach any requests that must be redone.
- */
- while ((wk = LIST_FIRST(&reattach)) != NULL) {
- WORKLIST_REMOVE(wk);
- WORKLIST_INSERT(&bp->b_dep, wk);
- }
-#ifdef DEBUG
- if (lk.lkt_held != -2)
- panic("softdep_disk_write_complete: lock lost");
- lk.lkt_held = -1;
-#endif
-}
-
-/*
- * Called from within softdep_disk_write_complete above. Note that
- * this routine is always called from interrupt level with further
- * splbio interrupts blocked.
- */
-/* the completed allocdirect */
-STATIC void
-handle_allocdirect_partdone(struct allocdirect *adp)
-{
- struct allocdirect *listadp;
- struct inodedep *inodedep;
- long bsize, delay;
-
- splassert(IPL_BIO);
-
- if ((adp->ad_state & ALLCOMPLETE) != ALLCOMPLETE)
- return;
- if (adp->ad_buf != NULL)
- panic("handle_allocdirect_partdone: dangling dep");
-
- /*
- * The on-disk inode cannot claim to be any larger than the last
- * fragment that has been written. Otherwise, the on-disk inode
- * might have fragments that were not the last block in the file
- * which would corrupt the filesystem. Thus, we cannot free any
- * allocdirects after one whose ad_oldblkno claims a fragment as
- * these blocks must be rolled back to zero before writing the inode.
- * We check the currently active set of allocdirects in id_inoupdt.
- */
- inodedep = adp->ad_inodedep;
- bsize = inodedep->id_fs->fs_bsize;
- TAILQ_FOREACH(listadp, &inodedep->id_inoupdt, ad_next) {
- /* found our block */
- if (listadp == adp)
- break;
- /* continue if ad_oldlbn is not a fragment */
- if (listadp->ad_oldsize == 0 ||
- listadp->ad_oldsize == bsize)
- continue;
- /* hit a fragment */
- return;
- }
- /*
- * If we have reached the end of the current list without
- * finding the just finished dependency, then it must be
- * on the future dependency list. Future dependencies cannot
- * be freed until they are moved to the current list.
- */
- if (listadp == NULL) {
-#ifdef DEBUG
- TAILQ_FOREACH(listadp, &inodedep->id_newinoupdt, ad_next)
- /* found our block */
- if (listadp == adp)
- break;
- if (listadp == NULL)
- panic("handle_allocdirect_partdone: lost dep");
-#endif /* DEBUG */
- return;
- }
- /*
- * If we have found the just finished dependency, then free
- * it along with anything that follows it that is complete.
- * If the inode still has a bitmap dependency, then it has
- * never been written to disk, hence the on-disk inode cannot
- * reference the old fragment so we can free it without delay.
- */
- delay = (inodedep->id_state & DEPCOMPLETE);
- for (; adp; adp = listadp) {
- listadp = TAILQ_NEXT(adp, ad_next);
- if ((adp->ad_state & ALLCOMPLETE) != ALLCOMPLETE)
- return;
- free_allocdirect(&inodedep->id_inoupdt, adp, delay);
- }
-}
-
-/*
- * Called from within softdep_disk_write_complete above. Note that
- * this routine is always called from interrupt level with further
- * splbio interrupts blocked.
- */
-/* the completed allocindir */
-STATIC void
-handle_allocindir_partdone(struct allocindir *aip)
-{
- struct indirdep *indirdep;
-
- splassert(IPL_BIO);
-
- if ((aip->ai_state & ALLCOMPLETE) != ALLCOMPLETE)
- return;
- if (aip->ai_buf != NULL)
- panic("handle_allocindir_partdone: dangling dependency");
- indirdep = aip->ai_indirdep;
- if (indirdep->ir_state & UNDONE) {
- LIST_REMOVE(aip, ai_next);
- LIST_INSERT_HEAD(&indirdep->ir_donehd, aip, ai_next);
- return;
- }
- if (indirdep->ir_state & UFS1FMT)
- ((int32_t *)indirdep->ir_savebp->b_data)[aip->ai_offset] =
- aip->ai_newblkno;
- else
- ((int64_t *)indirdep->ir_savebp->b_data)[aip->ai_offset] =
- aip->ai_newblkno;
- LIST_REMOVE(aip, ai_next);
- if (aip->ai_freefrag != NULL)
- add_to_worklist(&aip->ai_freefrag->ff_list);
- WORKITEM_FREE(aip, D_ALLOCINDIR);
-}
-
-/*
- * Called from within softdep_disk_write_complete above to restore
- * in-memory inode block contents to their most up-to-date state. Note
- * that this routine is always called from interrupt level with further
- * splbio interrupts blocked.
- */
-/* buffer containing the inode block */
-STATIC int
-handle_written_inodeblock(struct inodedep *inodedep, struct buf *bp)
-{
- struct worklist *wk, *filefree;
- struct allocdirect *adp, *nextadp;
- struct ufs1_dinode *dp1 = NULL;
- struct ufs2_dinode *dp2 = NULL;
- int hadchanges, fstype;
-
- splassert(IPL_BIO);
-
- if ((inodedep->id_state & IOSTARTED) == 0)
- panic("handle_written_inodeblock: not started");
- inodedep->id_state &= ~IOSTARTED;
-
- if (inodedep->id_fs->fs_magic == FS_UFS1_MAGIC) {
- fstype = UM_UFS1;
- dp1 = (struct ufs1_dinode *) bp->b_data +
- ino_to_fsbo(inodedep->id_fs, inodedep->id_ino);
- } else {
- fstype = UM_UFS2;
- dp2 = (struct ufs2_dinode *) bp->b_data +
- ino_to_fsbo(inodedep->id_fs, inodedep->id_ino);
- }
-
- /*
- * If we had to rollback the inode allocation because of
- * bitmaps being incomplete, then simply restore it.
- * Keep the block dirty so that it will not be reclaimed until
- * all associated dependencies have been cleared and the
- * corresponding updates written to disk.
- */
- if (inodedep->id_savedino1 != NULL) {
- if (fstype == UM_UFS1)
- *dp1 = *inodedep->id_savedino1;
- else
- *dp2 = *inodedep->id_savedino2;
- free(inodedep->id_savedino1, M_INODEDEP, inodedep->id_unsize);
- inodedep->id_savedino1 = NULL;
- if ((bp->b_flags & B_DELWRI) == 0)
- stat_inode_bitmap++;
- buf_dirty(bp);
- return (1);
- }
- inodedep->id_state |= COMPLETE;
- /*
- * Roll forward anything that had to be rolled back before
- * the inode could be updated.
- */
- hadchanges = 0;
- for (adp = TAILQ_FIRST(&inodedep->id_inoupdt); adp; adp = nextadp) {
- nextadp = TAILQ_NEXT(adp, ad_next);
- if (adp->ad_state & ATTACHED)
- panic("handle_written_inodeblock: new entry");
- if (fstype == UM_UFS1) {
- if (adp->ad_lbn < NDADDR) {
- if (dp1->di_db[adp->ad_lbn] != adp->ad_oldblkno)
- panic("%s: %s #%lld mismatch %d != "
- "%lld",
- "handle_written_inodeblock",
- "direct pointer",
- (long long)adp->ad_lbn,
- dp1->di_db[adp->ad_lbn],
- (long long)adp->ad_oldblkno);
- dp1->di_db[adp->ad_lbn] = adp->ad_newblkno;
- } else {
- if (dp1->di_ib[adp->ad_lbn - NDADDR] != 0)
- panic("%s: %s #%lld allocated as %d",
- "handle_written_inodeblock",
- "indirect pointer",
- (long long)(adp->ad_lbn - NDADDR),
- dp1->di_ib[adp->ad_lbn - NDADDR]);
- dp1->di_ib[adp->ad_lbn - NDADDR] =
- adp->ad_newblkno;
- }
- } else {
- if (adp->ad_lbn < NDADDR) {
- if (dp2->di_db[adp->ad_lbn] != adp->ad_oldblkno)
- panic("%s: %s #%lld mismatch %lld != "
- "%lld", "handle_written_inodeblock",
- "direct pointer",
- (long long)adp->ad_lbn,
- dp2->di_db[adp->ad_lbn],
- (long long)adp->ad_oldblkno);
- dp2->di_db[adp->ad_lbn] = adp->ad_newblkno;
- } else {
- if (dp2->di_ib[adp->ad_lbn - NDADDR] != 0)
- panic("%s: %s #%lld allocated as %lld",
- "handle_written_inodeblock",
- "indirect pointer",
- (long long)(adp->ad_lbn - NDADDR),
- dp2->di_ib[adp->ad_lbn - NDADDR]);
- dp2->di_ib[adp->ad_lbn - NDADDR] =
- adp->ad_newblkno;
- }
- }
- adp->ad_state &= ~UNDONE;
- adp->ad_state |= ATTACHED;
- hadchanges = 1;
- }
- if (hadchanges && (bp->b_flags & B_DELWRI) == 0)
- stat_direct_blk_ptrs++;
- /*
- * Reset the file size to its most up-to-date value.
- */
- if (inodedep->id_savedsize == -1)
- panic("handle_written_inodeblock: bad size");
-
- if (fstype == UM_UFS1) {
- if (dp1->di_size != inodedep->id_savedsize) {
- dp1->di_size = inodedep->id_savedsize;
- hadchanges = 1;
- }
- } else {
- if (dp2->di_size != inodedep->id_savedsize) {
- dp2->di_size = inodedep->id_savedsize;
- hadchanges = 1;
- }
- }
- inodedep->id_savedsize = -1;
- /*
- * If there were any rollbacks in the inode block, then it must be
- * marked dirty so that its will eventually get written back in
- * its correct form.
- */
- if (hadchanges)
- buf_dirty(bp);
- /*
- * Process any allocdirects that completed during the update.
- */
- if ((adp = TAILQ_FIRST(&inodedep->id_inoupdt)) != NULL)
- handle_allocdirect_partdone(adp);
- /*
- * Process deallocations that were held pending until the
- * inode had been written to disk. Freeing of the inode
- * is delayed until after all blocks have been freed to
- * avoid creation of new <vfsid, inum, lbn> triples
- * before the old ones have been deleted.
- */
- filefree = NULL;
- while ((wk = LIST_FIRST(&inodedep->id_bufwait)) != NULL) {
- WORKLIST_REMOVE(wk);
- switch (wk->wk_type) {
-
- case D_FREEFILE:
- /*
- * We defer adding filefree to the worklist until
- * all other additions have been made to ensure
- * that it will be done after all the old blocks
- * have been freed.
- */
- if (filefree != NULL)
- panic("handle_written_inodeblock: filefree");
- filefree = wk;
- continue;
-
- case D_MKDIR:
- handle_written_mkdir(WK_MKDIR(wk), MKDIR_PARENT);
- continue;
-
- case D_DIRADD:
- diradd_inode_written(WK_DIRADD(wk), inodedep);
- continue;
-
- case D_FREEBLKS:
- wk->wk_state |= COMPLETE;
- if ((wk->wk_state & ALLCOMPLETE) != ALLCOMPLETE)
- continue;
- /* FALLTHROUGH */
- case D_FREEFRAG:
- case D_DIRREM:
- add_to_worklist(wk);
- continue;
-
- case D_NEWDIRBLK:
- free_newdirblk(WK_NEWDIRBLK(wk));
- continue;
-
- default:
- panic("handle_written_inodeblock: Unknown type %s",
- TYPENAME(wk->wk_type));
- /* NOTREACHED */
- }
- }
- if (filefree != NULL) {
- if (free_inodedep(inodedep) == 0)
- panic("handle_written_inodeblock: live inodedep");
- add_to_worklist(filefree);
- return (0);
- }
-
- /*
- * If no outstanding dependencies, free it.
- */
- if (free_inodedep(inodedep) ||
- TAILQ_FIRST(&inodedep->id_inoupdt) == NULL)
- return (0);
- return (hadchanges);
-}
-
-/*
- * Process a diradd entry after its dependent inode has been written.
- * This routine must be called with splbio interrupts blocked.
- */
-STATIC void
-diradd_inode_written(struct diradd *dap, struct inodedep *inodedep)
-{
- struct pagedep *pagedep;
-
- splassert(IPL_BIO);
-
- dap->da_state |= COMPLETE;
- if ((dap->da_state & ALLCOMPLETE) == ALLCOMPLETE) {
- if (dap->da_state & DIRCHG)
- pagedep = dap->da_previous->dm_pagedep;
- else
- pagedep = dap->da_pagedep;
- LIST_REMOVE(dap, da_pdlist);
- LIST_INSERT_HEAD(&pagedep->pd_pendinghd, dap, da_pdlist);
- }
- WORKLIST_INSERT(&inodedep->id_pendinghd, &dap->da_list);
-}
-
-/*
- * Handle the completion of a mkdir dependency.
- */
-STATIC void
-handle_written_mkdir(struct mkdir *mkdir, int type)
-{
- struct diradd *dap;
- struct pagedep *pagedep;
-
- splassert(IPL_BIO);
-
- if (mkdir->md_state != type)
- panic("handle_written_mkdir: bad type");
- dap = mkdir->md_diradd;
- dap->da_state &= ~type;
- if ((dap->da_state & (MKDIR_PARENT | MKDIR_BODY)) == 0)
- dap->da_state |= DEPCOMPLETE;
- if ((dap->da_state & ALLCOMPLETE) == ALLCOMPLETE) {
- if (dap->da_state & DIRCHG)
- pagedep = dap->da_previous->dm_pagedep;
- else
- pagedep = dap->da_pagedep;
- LIST_REMOVE(dap, da_pdlist);
- LIST_INSERT_HEAD(&pagedep->pd_pendinghd, dap, da_pdlist);
- }
- LIST_REMOVE(mkdir, md_mkdirs);
- WORKITEM_FREE(mkdir, D_MKDIR);
-}
-
-/*
- * Called from within softdep_disk_write_complete above.
- * A write operation was just completed. Removed inodes can
- * now be freed and associated block pointers may be committed.
- * Note that this routine is always called from interrupt level
- * with further splbio interrupts blocked.
- */
-/* buffer containing the written page */
-STATIC int
-handle_written_filepage(struct pagedep *pagedep, struct buf *bp)
-{
- struct dirrem *dirrem;
- struct diradd *dap, *nextdap;
- struct direct *ep;
- int i, chgs;
-
- splassert(IPL_BIO);
-
- if ((pagedep->pd_state & IOSTARTED) == 0)
- panic("handle_written_filepage: not started");
- pagedep->pd_state &= ~IOSTARTED;
- /*
- * Process any directory removals that have been committed.
- */
- while ((dirrem = LIST_FIRST(&pagedep->pd_dirremhd)) != NULL) {
- LIST_REMOVE(dirrem, dm_next);
- dirrem->dm_dirinum = pagedep->pd_ino;
- add_to_worklist(&dirrem->dm_list);
- }
- /*
- * Free any directory additions that have been committed.
- * If it is a newly allocated block, we have to wait until
- * the on-disk directory inode claims the new block.
- */
- if ((pagedep->pd_state & NEWBLOCK) == 0)
- while ((dap = LIST_FIRST(&pagedep->pd_pendinghd)) != NULL)
- free_diradd(dap);
- /*
- * Uncommitted directory entries must be restored.
- */
- for (chgs = 0, i = 0; i < DAHASHSZ; i++) {
- for (dap = LIST_FIRST(&pagedep->pd_diraddhd[i]); dap;
- dap = nextdap) {
- nextdap = LIST_NEXT(dap, da_pdlist);
- if (dap->da_state & ATTACHED)
- panic("handle_written_filepage: attached");
- ep = (struct direct *)
- ((char *)bp->b_data + dap->da_offset);
- ep->d_ino = dap->da_newinum;
- dap->da_state &= ~UNDONE;
- dap->da_state |= ATTACHED;
- chgs = 1;
- /*
- * If the inode referenced by the directory has
- * been written out, then the dependency can be
- * moved to the pending list.
- */
- if ((dap->da_state & ALLCOMPLETE) == ALLCOMPLETE) {
- LIST_REMOVE(dap, da_pdlist);
- LIST_INSERT_HEAD(&pagedep->pd_pendinghd, dap,
- da_pdlist);
- }
- }
- }
- /*
- * If there were any rollbacks in the directory, then it must be
- * marked dirty so that its will eventually get written back in
- * its correct form.
- */
- if (chgs) {
- if ((bp->b_flags & B_DELWRI) == 0)
- stat_dir_entry++;
- buf_dirty(bp);
- return (1);
- }
- /*
- * If we are not waiting for a new directory block to be
- * claimed by its inode, then the pagedep will be freed.
- * Otherwise it will remain to track any new entries on
- * the page in case they are fsync'ed.
- */
- if ((pagedep->pd_state & NEWBLOCK) == 0) {
- LIST_REMOVE(pagedep, pd_hash);
- WORKITEM_FREE(pagedep, D_PAGEDEP);
- }
- return (0);
-}
-
-/*
- * Writing back in-core inode structures.
- *
- * The file system only accesses an inode's contents when it occupies an
- * "in-core" inode structure. These "in-core" structures are separate from
- * the page frames used to cache inode blocks. Only the latter are
- * transferred to/from the disk. So, when the updated contents of the
- * "in-core" inode structure are copied to the corresponding in-memory inode
- * block, the dependencies are also transferred. The following procedure is
- * called when copying a dirty "in-core" inode to a cached inode block.
- */
-
-/*
- * Called when an inode is loaded from disk. If the effective link count
- * differed from the actual link count when it was last flushed, then we
- * need to ensure that the correct effective link count is put back.
- */
-/* the "in_core" copy of the inode */
-void
-softdep_load_inodeblock(struct inode *ip)
-{
- struct inodedep *inodedep;
-
- /*
- * Check for alternate nlink count.
- */
- ip->i_effnlink = DIP(ip, nlink);
- ACQUIRE_LOCK(&lk);
- if (inodedep_lookup(ip->i_fs, ip->i_number, 0, &inodedep) == 0) {
- FREE_LOCK(&lk);
- return;
- }
- ip->i_effnlink -= inodedep->id_nlinkdelta;
- FREE_LOCK(&lk);
-}
-
-/*
- * This routine is called just before the "in-core" inode
- * information is to be copied to the in-memory inode block.
- * Recall that an inode block contains several inodes. If
- * the force flag is set, then the dependencies will be
- * cleared so that the update can always be made. Note that
- * the buffer is locked when this routine is called, so we
- * will never be in the middle of writing the inode block
- * to disk.
- */
-/* the "in_core" copy of the inode */
-/* the buffer containing the inode block */
-/* nonzero => update must be allowed */
-void
-softdep_update_inodeblock(struct inode *ip, struct buf *bp, int waitfor)
-{
- struct inodedep *inodedep;
- struct worklist *wk;
- int error, gotit;
-
- /*
- * If the effective link count is not equal to the actual link
- * count, then we must track the difference in an inodedep while
- * the inode is (potentially) tossed out of the cache. Otherwise,
- * if there is no existing inodedep, then there are no dependencies
- * to track.
- */
- ACQUIRE_LOCK(&lk);
- if (inodedep_lookup(ip->i_fs, ip->i_number, 0, &inodedep) == 0) {
- FREE_LOCK(&lk);
- if (ip->i_effnlink != DIP(ip, nlink))
- panic("softdep_update_inodeblock: bad link count");
- return;
- }
- if (inodedep->id_nlinkdelta != DIP(ip, nlink) - ip->i_effnlink) {
- FREE_LOCK(&lk);
- panic("softdep_update_inodeblock: bad delta");
- }
- /*
- * Changes have been initiated. Anything depending on these
- * changes cannot occur until this inode has been written.
- */
- inodedep->id_state &= ~COMPLETE;
- if ((inodedep->id_state & ONWORKLIST) == 0)
- WORKLIST_INSERT(&bp->b_dep, &inodedep->id_list);
- /*
- * Any new dependencies associated with the incore inode must
- * now be moved to the list associated with the buffer holding
- * the in-memory copy of the inode. Once merged process any
- * allocdirects that are completed by the merger.
- */
- merge_inode_lists(inodedep);
- if (TAILQ_FIRST(&inodedep->id_inoupdt) != NULL)
- handle_allocdirect_partdone(TAILQ_FIRST(&inodedep->id_inoupdt));
- /*
- * Now that the inode has been pushed into the buffer, the
- * operations dependent on the inode being written to disk
- * can be moved to the id_bufwait so that they will be
- * processed when the buffer I/O completes.
- */
- while ((wk = LIST_FIRST(&inodedep->id_inowait)) != NULL) {
- WORKLIST_REMOVE(wk);
- WORKLIST_INSERT(&inodedep->id_bufwait, wk);
- }
- /*
- * Newly allocated inodes cannot be written until the bitmap
- * that allocates them have been written (indicated by
- * DEPCOMPLETE being set in id_state). If we are doing a
- * forced sync (e.g., an fsync on a file), we force the bitmap
- * to be written so that the update can be done.
- */
- do {
- if ((inodedep->id_state & DEPCOMPLETE) != 0 || waitfor == 0) {
- FREE_LOCK(&lk);
- return;
- }
- bp = inodedep->id_buf;
- gotit = getdirtybuf(bp, MNT_WAIT);
- } while (gotit == -1);
- FREE_LOCK(&lk);
- if (gotit && (error = bwrite(bp)) != 0)
- softdep_error("softdep_update_inodeblock: bwrite", error);
- if ((inodedep->id_state & DEPCOMPLETE) == 0)
- panic("softdep_update_inodeblock: update failed");
-}
-
-/*
- * Merge the new inode dependency list (id_newinoupdt) into the old
- * inode dependency list (id_inoupdt). This routine must be called
- * with splbio interrupts blocked.
- */
-STATIC void
-merge_inode_lists(struct inodedep *inodedep)
-{
- struct allocdirect *listadp, *newadp;
-
- splassert(IPL_BIO);
-
- newadp = TAILQ_FIRST(&inodedep->id_newinoupdt);
- for (listadp = TAILQ_FIRST(&inodedep->id_inoupdt); listadp && newadp;) {
- if (listadp->ad_lbn < newadp->ad_lbn) {
- listadp = TAILQ_NEXT(listadp, ad_next);
- continue;
- }
- TAILQ_REMOVE(&inodedep->id_newinoupdt, newadp, ad_next);
- TAILQ_INSERT_BEFORE(listadp, newadp, ad_next);
- if (listadp->ad_lbn == newadp->ad_lbn) {
- allocdirect_merge(&inodedep->id_inoupdt, newadp,
- listadp);
- listadp = newadp;
- }
- newadp = TAILQ_FIRST(&inodedep->id_newinoupdt);
- }
- TAILQ_CONCAT(&inodedep->id_inoupdt, &inodedep->id_newinoupdt, ad_next);
-}
-
-/*
- * If we are doing an fsync, then we must ensure that any directory
- * entries for the inode have been written after the inode gets to disk.
- */
-/* the "in_core" copy of the inode */
-int
-softdep_fsync(struct vnode *vp)
-{
- struct inodedep *inodedep;
- struct pagedep *pagedep;
- struct worklist *wk;
- struct diradd *dap;
- struct mount *mnt;
- struct vnode *pvp;
- struct inode *ip;
- struct inode *pip;
- struct buf *bp;
- struct fs *fs;
- struct proc *p = CURPROC; /* XXX */
- int error, flushparent;
- ufsino_t parentino;
- daddr_t lbn;
-
- ip = VTOI(vp);
- fs = ip->i_fs;
- ACQUIRE_LOCK(&lk);
- if (inodedep_lookup(fs, ip->i_number, 0, &inodedep) == 0) {
- FREE_LOCK(&lk);
- return (0);
- }
- if (LIST_FIRST(&inodedep->id_inowait) != NULL ||
- LIST_FIRST(&inodedep->id_bufwait) != NULL ||
- TAILQ_FIRST(&inodedep->id_inoupdt) != NULL ||
- TAILQ_FIRST(&inodedep->id_newinoupdt) != NULL) {
- FREE_LOCK(&lk);
- panic("softdep_fsync: pending ops");
- }
- for (error = 0, flushparent = 0; ; ) {
- if ((wk = LIST_FIRST(&inodedep->id_pendinghd)) == NULL)
- break;
- if (wk->wk_type != D_DIRADD) {
- FREE_LOCK(&lk);
- panic("softdep_fsync: Unexpected type %s",
- TYPENAME(wk->wk_type));
- }
- dap = WK_DIRADD(wk);
- /*
- * Flush our parent if this directory entry has a MKDIR_PARENT
- * dependency or is contained in a newly allocated block.
- */
- if (dap->da_state & DIRCHG)
- pagedep = dap->da_previous->dm_pagedep;
- else
- pagedep = dap->da_pagedep;
- mnt = pagedep->pd_mnt;
- parentino = pagedep->pd_ino;
- lbn = pagedep->pd_lbn;
- if ((dap->da_state & (MKDIR_BODY | COMPLETE)) != COMPLETE) {
- FREE_LOCK(&lk);
- panic("softdep_fsync: dirty");
- }
- if ((dap->da_state & MKDIR_PARENT) ||
- (pagedep->pd_state & NEWBLOCK))
- flushparent = 1;
- else
- flushparent = 0;
- /*
- * If we are being fsync'ed as part of vgone'ing this vnode,
- * then we will not be able to release and recover the
- * vnode below, so we just have to give up on writing its
- * directory entry out. It will eventually be written, just
- * not now, but then the user was not asking to have it
- * written, so we are not breaking any promises.
- */
- mtx_enter(&vnode_mtx);
- if (vp->v_lflag & VXLOCK) {
- mtx_leave(&vnode_mtx);
- break;
- }
- mtx_leave(&vnode_mtx);
- /*
- * We prevent deadlock by always fetching inodes from the
- * root, moving down the directory tree. Thus, when fetching
- * our parent directory, we must unlock ourselves before
- * requesting the lock on our parent. See the comment in
- * ufs_lookup for details on possible races.
- */
- FREE_LOCK(&lk);
- VOP_UNLOCK(vp);
- error = VFS_VGET(mnt, parentino, &pvp);
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
- if (error != 0)
- return (error);
- /*
- * All MKDIR_PARENT dependencies and all the NEWBLOCK pagedeps
- * that are contained in direct blocks will be resolved by
- * doing a UFS_UPDATE. Pagedeps contained in indirect blocks
- * may require a complete sync'ing of the directory. So, we
- * try the cheap and fast UFS_UPDATE first, and if that fails,
- * then we do the slower VOP_FSYNC of the directory.
- */
- pip = VTOI(pvp);
- if (flushparent) {
- error = UFS_UPDATE(pip, 1);
- if (error) {
- vput(pvp);
- return (error);
- }
- if (pagedep->pd_state & NEWBLOCK) {
- error = VOP_FSYNC(pvp, p->p_ucred, MNT_WAIT, p);
- if (error) {
- vput(pvp);
- return (error);
- }
- }
- }
- /*
- * Flush directory page containing the inode's name.
- */
- error = bread(pvp, lbn, fs->fs_bsize, &bp);
- if (error == 0) {
- bp->b_bcount = blksize(fs, pip, lbn);
- error = bwrite(bp);
- } else
- brelse(bp);
- vput(pvp);
- if (error != 0)
- return (error);
- ACQUIRE_LOCK(&lk);
- if (inodedep_lookup(fs, ip->i_number, 0, &inodedep) == 0)
- break;
- }
- FREE_LOCK(&lk);
- return (0);
-}
-
-/*
- * Flush all the dirty bitmaps associated with the block device
- * before flushing the rest of the dirty blocks so as to reduce
- * the number of dependencies that will have to be rolled back.
- */
-void
-softdep_fsync_mountdev(struct vnode *vp, int waitfor)
-{
- struct buf *bp, *nbp;
- struct worklist *wk;
-
- if (!vn_isdisk(vp, NULL))
- panic("softdep_fsync_mountdev: vnode not a disk");
- ACQUIRE_LOCK(&lk);
- LIST_FOREACH_SAFE(bp, &vp->v_dirtyblkhd, b_vnbufs, nbp) {
- /*
- * If it is already scheduled, skip to the next buffer.
- */
- splassert(IPL_BIO);
- if (bp->b_flags & B_BUSY)
- continue;
-
- if ((bp->b_flags & B_DELWRI) == 0) {
- FREE_LOCK(&lk);
- panic("softdep_fsync_mountdev: not dirty");
- }
- /*
- * We are only interested in bitmaps with outstanding
- * dependencies.
- */
- if ((wk = LIST_FIRST(&bp->b_dep)) == NULL ||
- wk->wk_type != D_BMSAFEMAP) {
- continue;
- }
- bremfree(bp);
- buf_acquire(bp);
- FREE_LOCK(&lk);
- (void) bawrite(bp);
- ACQUIRE_LOCK(&lk);
- /*
- * Since we may have slept during the I/O, we need
- * to start from a known point.
- */
- nbp = LIST_FIRST(&vp->v_dirtyblkhd);
- }
- if (waitfor == MNT_WAIT)
- drain_output(vp, 1);
- FREE_LOCK(&lk);
-}
-
-/*
- * This routine is called when we are trying to synchronously flush a
- * file. This routine must eliminate any filesystem metadata dependencies
- * so that the syncing routine can succeed by pushing the dirty blocks
- * associated with the file. If any I/O errors occur, they are returned.
- */
-int
-softdep_sync_metadata(struct vop_fsync_args *ap)
-{
- struct vnode *vp = ap->a_vp;
- struct pagedep *pagedep;
- struct allocdirect *adp;
- struct allocindir *aip;
- struct buf *bp, *nbp;
- struct worklist *wk;
- int i, gotit, error, waitfor;
-
- /*
- * Check whether this vnode is involved in a filesystem
- * that is doing soft dependency processing.
- */
- if (!vn_isdisk(vp, NULL)) {
- if (!DOINGSOFTDEP(vp))
- return (0);
- } else
- if (vp->v_specmountpoint == NULL ||
- (vp->v_specmountpoint->mnt_flag & MNT_SOFTDEP) == 0)
- return (0);
- /*
- * Ensure that any direct block dependencies have been cleared.
- */
- ACQUIRE_LOCK(&lk);
- if ((error = flush_inodedep_deps(VTOI(vp)->i_fs, VTOI(vp)->i_number))) {
- FREE_LOCK(&lk);
- return (error);
- }
- /*
- * For most files, the only metadata dependencies are the
- * cylinder group maps that allocate their inode or blocks.
- * The block allocation dependencies can be found by traversing
- * the dependency lists for any buffers that remain on their
- * dirty buffer list. The inode allocation dependency will
- * be resolved when the inode is updated with MNT_WAIT.
- * This work is done in two passes. The first pass grabs most
- * of the buffers and begins asynchronously writing them. The
- * only way to wait for these asynchronous writes is to sleep
- * on the filesystem vnode which may stay busy for a long time
- * if the filesystem is active. So, instead, we make a second
- * pass over the dependencies blocking on each write. In the
- * usual case we will be blocking against a write that we
- * initiated, so when it is done the dependency will have been
- * resolved. Thus the second pass is expected to end quickly.
- */
- waitfor = MNT_NOWAIT;
-top:
- /*
- * We must wait for any I/O in progress to finish so that
- * all potential buffers on the dirty list will be visible.
- */
- drain_output(vp, 1);
- bp = LIST_FIRST(&vp->v_dirtyblkhd);
- gotit = getdirtybuf(bp, MNT_WAIT);
- if (gotit == 0) {
- FREE_LOCK(&lk);
- return (0);
- } else if (gotit == -1)
- goto top;
-loop:
- /*
- * As we hold the buffer locked, none of its dependencies
- * will disappear.
- */
- LIST_FOREACH(wk, &bp->b_dep, wk_list) {
- switch (wk->wk_type) {
-
- case D_ALLOCDIRECT:
- adp = WK_ALLOCDIRECT(wk);
- if (adp->ad_state & DEPCOMPLETE)
- break;
- nbp = adp->ad_buf;
- gotit = getdirtybuf(nbp, waitfor);
- if (gotit == 0)
- break;
- else if (gotit == -1)
- goto loop;
- FREE_LOCK(&lk);
- if (waitfor == MNT_NOWAIT) {
- bawrite(nbp);
- } else if ((error = VOP_BWRITE(nbp)) != 0) {
- bawrite(bp);
- return (error);
- }
- ACQUIRE_LOCK(&lk);
- break;
-
- case D_ALLOCINDIR:
- aip = WK_ALLOCINDIR(wk);
- if (aip->ai_state & DEPCOMPLETE)
- break;
- nbp = aip->ai_buf;
- gotit = getdirtybuf(nbp, waitfor);
- if (gotit == 0)
- break;
- else if (gotit == -1)
- goto loop;
- FREE_LOCK(&lk);
- if (waitfor == MNT_NOWAIT) {
- bawrite(nbp);
- } else if ((error = VOP_BWRITE(nbp)) != 0) {
- bawrite(bp);
- return (error);
- }
- ACQUIRE_LOCK(&lk);
- break;
-
- case D_INDIRDEP:
- restart:
-
- LIST_FOREACH(aip, &WK_INDIRDEP(wk)->ir_deplisthd, ai_next) {
- if (aip->ai_state & DEPCOMPLETE)
- continue;
- nbp = aip->ai_buf;
- if (getdirtybuf(nbp, MNT_WAIT) <= 0)
- goto restart;
- FREE_LOCK(&lk);
- if ((error = VOP_BWRITE(nbp)) != 0) {
- bawrite(bp);
- return (error);
- }
- ACQUIRE_LOCK(&lk);
- goto restart;
- }
- break;
-
- case D_INODEDEP:
- if ((error = flush_inodedep_deps(WK_INODEDEP(wk)->id_fs,
- WK_INODEDEP(wk)->id_ino)) != 0) {
- FREE_LOCK(&lk);
- bawrite(bp);
- return (error);
- }
- break;
-
- case D_PAGEDEP:
- /*
- * We are trying to sync a directory that may
- * have dependencies on both its own metadata
- * and/or dependencies on the inodes of any
- * recently allocated files. We walk its diradd
- * lists pushing out the associated inode.
- */
- pagedep = WK_PAGEDEP(wk);
- for (i = 0; i < DAHASHSZ; i++) {
- if (LIST_FIRST(&pagedep->pd_diraddhd[i]) ==
- NULL)
- continue;
- if ((error =
- flush_pagedep_deps(vp, pagedep->pd_mnt,
- &pagedep->pd_diraddhd[i]))) {
- FREE_LOCK(&lk);
- bawrite(bp);
- return (error);
- }
- }
- break;
-
- case D_MKDIR:
- /*
- * This case should never happen if the vnode has
- * been properly sync'ed. However, if this function
- * is used at a place where the vnode has not yet
- * been sync'ed, this dependency can show up. So,
- * rather than panic, just flush it.
- */
- nbp = WK_MKDIR(wk)->md_buf;
- KASSERT(bp != nbp);
- gotit = getdirtybuf(nbp, waitfor);
- if (gotit == 0)
- break;
- else if (gotit == -1)
- goto loop;
- FREE_LOCK(&lk);
- if (waitfor == MNT_NOWAIT) {
- bawrite(nbp);
- } else if ((error = VOP_BWRITE(nbp)) != 0) {
- bawrite(bp);
- return (error);
- }
- ACQUIRE_LOCK(&lk);
- break;
-
- case D_BMSAFEMAP:
- /*
- * This case should never happen if the vnode has
- * been properly sync'ed. However, if this function
- * is used at a place where the vnode has not yet
- * been sync'ed, this dependency can show up. So,
- * rather than panic, just flush it.
- */
- nbp = WK_BMSAFEMAP(wk)->sm_buf;
- if (bp == nbp)
- break;
- gotit = getdirtybuf(nbp, waitfor);
- if (gotit == 0)
- break;
- else if (gotit == -1)
- goto loop;
- FREE_LOCK(&lk);
- if (waitfor == MNT_NOWAIT) {
- bawrite(nbp);
- } else if ((error = VOP_BWRITE(nbp)) != 0) {
- bawrite(bp);
- return (error);
- }
- ACQUIRE_LOCK(&lk);
- break;
-
- default:
- FREE_LOCK(&lk);
- panic("softdep_sync_metadata: Unknown type %s",
- TYPENAME(wk->wk_type));
- /* NOTREACHED */
- }
- }
- do {
- nbp = LIST_NEXT(bp, b_vnbufs);
- gotit = getdirtybuf(nbp, MNT_WAIT);
- } while (gotit == -1);
- FREE_LOCK(&lk);
- bawrite(bp);
- ACQUIRE_LOCK(&lk);
- if (nbp != NULL) {
- bp = nbp;
- goto loop;
- }
- /*
- * The brief unlock is to allow any pent up dependency
- * processing to be done. Then proceed with the second pass.
- */
- if (waitfor == MNT_NOWAIT) {
- waitfor = MNT_WAIT;
- FREE_LOCK(&lk);
- ACQUIRE_LOCK(&lk);
- goto top;
- }
-
- /*
- * If we have managed to get rid of all the dirty buffers,
- * then we are done. For certain directories and block
- * devices, we may need to do further work.
- *
- * We must wait for any I/O in progress to finish so that
- * all potential buffers on the dirty list will be visible.
- */
- drain_output(vp, 1);
- if (LIST_EMPTY(&vp->v_dirtyblkhd)) {
- FREE_LOCK(&lk);
- return (0);
- }
-
- FREE_LOCK(&lk);
- /*
- * If we are trying to sync a block device, some of its buffers may
- * contain metadata that cannot be written until the contents of some
- * partially written files have been written to disk. The only easy
- * way to accomplish this is to sync the entire filesystem (luckily
- * this happens rarely).
- */
- if (vn_isdisk(vp, NULL) &&
- vp->v_specmountpoint && !VOP_ISLOCKED(vp) &&
- (error = VFS_SYNC(vp->v_specmountpoint, MNT_WAIT, 0, ap->a_cred,
- ap->a_p)) != 0)
- return (error);
- return (0);
-}
-
-/*
- * Flush the dependencies associated with an inodedep.
- * Called with splbio blocked.
- */
-STATIC int
-flush_inodedep_deps(struct fs *fs, ufsino_t ino)
-{
- struct inodedep *inodedep;
- struct allocdirect *adp;
- int gotit, error, waitfor;
- struct buf *bp;
-
- splassert(IPL_BIO);
-
- /*
- * This work is done in two passes. The first pass grabs most
- * of the buffers and begins asynchronously writing them. The
- * only way to wait for these asynchronous writes is to sleep
- * on the filesystem vnode which may stay busy for a long time
- * if the filesystem is active. So, instead, we make a second
- * pass over the dependencies blocking on each write. In the
- * usual case we will be blocking against a write that we
- * initiated, so when it is done the dependency will have been
- * resolved. Thus the second pass is expected to end quickly.
- * We give a brief window at the top of the loop to allow
- * any pending I/O to complete.
- */
- for (waitfor = MNT_NOWAIT; ; ) {
- retry_ino:
- FREE_LOCK(&lk);
- ACQUIRE_LOCK(&lk);
- if (inodedep_lookup(fs, ino, 0, &inodedep) == 0)
- return (0);
- TAILQ_FOREACH(adp, &inodedep->id_inoupdt, ad_next) {
- if (adp->ad_state & DEPCOMPLETE)
- continue;
- bp = adp->ad_buf;
- gotit = getdirtybuf(bp, waitfor);
- if (gotit == 0) {
- if (waitfor == MNT_NOWAIT)
- continue;
- break;
- } else if (gotit == -1)
- goto retry_ino;
- FREE_LOCK(&lk);
- if (waitfor == MNT_NOWAIT) {
- bawrite(bp);
- } else if ((error = VOP_BWRITE(bp)) != 0) {
- ACQUIRE_LOCK(&lk);
- return (error);
- }
- ACQUIRE_LOCK(&lk);
- break;
- }
- if (adp != NULL)
- continue;
- retry_newino:
- TAILQ_FOREACH(adp, &inodedep->id_newinoupdt, ad_next) {
- if (adp->ad_state & DEPCOMPLETE)
- continue;
- bp = adp->ad_buf;
- gotit = getdirtybuf(bp, waitfor);
- if (gotit == 0) {
- if (waitfor == MNT_NOWAIT)
- continue;
- break;
- } else if (gotit == -1)
- goto retry_newino;
- FREE_LOCK(&lk);
- if (waitfor == MNT_NOWAIT) {
- bawrite(bp);
- } else if ((error = VOP_BWRITE(bp)) != 0) {
- ACQUIRE_LOCK(&lk);
- return (error);
- }
- ACQUIRE_LOCK(&lk);
- break;
- }
- if (adp != NULL)
- continue;
- /*
- * If pass2, we are done, otherwise do pass 2.
- */
- if (waitfor == MNT_WAIT)
- break;
- waitfor = MNT_WAIT;
- }
- /*
- * Try freeing inodedep in case all dependencies have been removed.
- */
- if (inodedep_lookup(fs, ino, 0, &inodedep) != 0)
- (void) free_inodedep(inodedep);
- return (0);
-}
-
-/*
- * Eliminate a pagedep dependency by flushing out all its diradd dependencies.
- * Called with splbio blocked.
- */
-STATIC int
-flush_pagedep_deps(struct vnode *pvp, struct mount *mp,
- struct diraddhd *diraddhdp)
-{
- struct proc *p = CURPROC; /* XXX */
- struct worklist *wk;
- struct inodedep *inodedep;
- struct ufsmount *ump;
- struct diradd *dap;
- struct vnode *vp;
- int gotit, error = 0;
- struct buf *bp;
- ufsino_t inum;
-
- splassert(IPL_BIO);
-
- ump = VFSTOUFS(mp);
- while ((dap = LIST_FIRST(diraddhdp)) != NULL) {
- /*
- * Flush ourselves if this directory entry
- * has a MKDIR_PARENT dependency.
- */
- if (dap->da_state & MKDIR_PARENT) {
- FREE_LOCK(&lk);
- if ((error = UFS_UPDATE(VTOI(pvp), 1)))
- break;
- ACQUIRE_LOCK(&lk);
- /*
- * If that cleared dependencies, go on to next.
- */
- if (dap != LIST_FIRST(diraddhdp))
- continue;
- if (dap->da_state & MKDIR_PARENT) {
- FREE_LOCK(&lk);
- panic("flush_pagedep_deps: MKDIR_PARENT");
- }
- }
- /*
- * A newly allocated directory must have its "." and
- * ".." entries written out before its name can be
- * committed in its parent. We do not want or need
- * the full semantics of a synchronous VOP_FSYNC as
- * that may end up here again, once for each directory
- * level in the filesystem. Instead, we push the blocks
- * and wait for them to clear. We have to fsync twice
- * because the first call may choose to defer blocks
- * that still have dependencies, but deferral will
- * happen at most once.
- */
- inum = dap->da_newinum;
- if (dap->da_state & MKDIR_BODY) {
- FREE_LOCK(&lk);
- if ((error = VFS_VGET(mp, inum, &vp)) != 0)
- break;
- if ((error=VOP_FSYNC(vp, p->p_ucred, MNT_NOWAIT, p)) ||
- (error=VOP_FSYNC(vp, p->p_ucred, MNT_NOWAIT, p))) {
- vput(vp);
- break;
- }
- drain_output(vp, 0);
- /*
- * If first block is still dirty with a D_MKDIR
- * dependency then it needs to be written now.
- */
- for (;;) {
- error = 0;
- ACQUIRE_LOCK(&lk);
- bp = incore(vp, 0);
- if (bp == NULL) {
- FREE_LOCK(&lk);
- break;
- }
- LIST_FOREACH(wk, &bp->b_dep, wk_list)
- if (wk->wk_type == D_MKDIR)
- break;
- if (wk) {
- gotit = getdirtybuf(bp, MNT_WAIT);
- FREE_LOCK(&lk);
- if (gotit == -1)
- continue;
- if (gotit && (error = bwrite(bp)) != 0)
- break;
- } else
- FREE_LOCK(&lk);
- break;
- }
- vput(vp);
- /* Flushing of first block failed */
- if (error)
- break;
- ACQUIRE_LOCK(&lk);
- /*
- * If that cleared dependencies, go on to next.
- */
- if (dap != LIST_FIRST(diraddhdp))
- continue;
- if (dap->da_state & MKDIR_BODY) {
- FREE_LOCK(&lk);
- panic("flush_pagedep_deps: MKDIR_BODY");
- }
- }
- /*
- * Flush the inode on which the directory entry depends.
- * Having accounted for MKDIR_PARENT and MKDIR_BODY above,
- * the only remaining dependency is that the updated inode
- * count must get pushed to disk. The inode has already
- * been pushed into its inode buffer (via VOP_UPDATE) at
- * the time of the reference count change. So we need only
- * locate that buffer, ensure that there will be no rollback
- * caused by a bitmap dependency, then write the inode buffer.
- */
- if (inodedep_lookup(ump->um_fs, inum, 0, &inodedep) == 0) {
- FREE_LOCK(&lk);
- panic("flush_pagedep_deps: lost inode");
- }
- /*
- * If the inode still has bitmap dependencies,
- * push them to disk.
- */
- retry:
- if ((inodedep->id_state & DEPCOMPLETE) == 0) {
- bp = inodedep->id_buf;
- gotit = getdirtybuf(bp, MNT_WAIT);
- if (gotit == -1)
- goto retry;
- FREE_LOCK(&lk);
- if (gotit && (error = bwrite(bp)) != 0)
- break;
- ACQUIRE_LOCK(&lk);
- if (dap != LIST_FIRST(diraddhdp))
- continue;
- }
- /*
- * If the inode is still sitting in a buffer waiting
- * to be written, push it to disk.
- */
- FREE_LOCK(&lk);
- if ((error = bread(ump->um_devvp,
- fsbtodb(ump->um_fs, ino_to_fsba(ump->um_fs, inum)),
- (int)ump->um_fs->fs_bsize, &bp)) != 0) {
- brelse(bp);
- break;
- }
- if ((error = bwrite(bp)) != 0)
- break;
- ACQUIRE_LOCK(&lk);
- /*
- * If we have failed to get rid of all the dependencies
- * then something is seriously wrong.
- */
- if (dap == LIST_FIRST(diraddhdp)) {
- FREE_LOCK(&lk);
- panic("flush_pagedep_deps: flush failed");
- }
- }
- if (error)
- ACQUIRE_LOCK(&lk);
- return (error);
-}
-
-/*
- * A large burst of file addition or deletion activity can drive the
- * memory load excessively high. First attempt to slow things down
- * using the techniques below. If that fails, this routine requests
- * the offending operations to fall back to running synchronously
- * until the memory load returns to a reasonable level.
- */
-int
-softdep_slowdown(struct vnode *vp)
-{
- int max_softdeps_hard;
-
- max_softdeps_hard = max_softdeps * 11 / 10;
- if (num_dirrem < max_softdeps_hard / 2 &&
- num_inodedep < max_softdeps_hard)
- return (0);
- stat_sync_limit_hit += 1;
- return (1);
-}
-
-/*
- * If memory utilization has gotten too high, deliberately slow things
- * down and speed up the I/O processing.
- */
-STATIC int
-request_cleanup(int resource, int islocked)
-{
- struct proc *p = CURPROC;
- int s;
-
- /*
- * We never hold up the filesystem syncer process.
- */
- if (p == filesys_syncer || (p->p_flag & P_SOFTDEP))
- return (0);
- /*
- * First check to see if the work list has gotten backlogged.
- * If it has, co-opt this process to help clean up two entries.
- * Because this process may hold inodes locked, we cannot
- * handle any remove requests that might block on a locked
- * inode as that could lead to deadlock. We set P_SOFTDEP
- * to avoid recursively processing the worklist.
- */
- if (num_on_worklist > max_softdeps / 10) {
- atomic_setbits_int(&p->p_flag, P_SOFTDEP);
- if (islocked)
- FREE_LOCK(&lk);
- process_worklist_item(NULL, NULL, LK_NOWAIT);
- process_worklist_item(NULL, NULL, LK_NOWAIT);
- atomic_clearbits_int(&p->p_flag, P_SOFTDEP);
- stat_worklist_push += 2;
- if (islocked)
- ACQUIRE_LOCK(&lk);
- return(1);
- }
- /*
- * Next, we attempt to speed up the syncer process. If that
- * is successful, then we allow the process to continue.
- */
- if (speedup_syncer())
- return(0);
- /*
- * If we are resource constrained on inode dependencies, try
- * flushing some dirty inodes. Otherwise, we are constrained
- * by file deletions, so try accelerating flushes of directories
- * with removal dependencies. We would like to do the cleanup
- * here, but we probably hold an inode locked at this point and
- * that might deadlock against one that we try to clean. So,
- * the best that we can do is request the syncer daemon to do
- * the cleanup for us.
- */
- switch (resource) {
-
- case FLUSH_INODES:
- stat_ino_limit_push += 1;
- req_clear_inodedeps += 1;
- stat_countp = &stat_ino_limit_hit;
- break;
-
- case FLUSH_REMOVE:
- stat_blk_limit_push += 1;
- req_clear_remove += 1;
- stat_countp = &stat_blk_limit_hit;
- break;
-
- default:
- if (islocked)
- FREE_LOCK(&lk);
- panic("request_cleanup: unknown type");
- }
- /*
- * Hopefully the syncer daemon will catch up and awaken us.
- * We wait at most tickdelay before proceeding in any case.
- */
- if (islocked == 0)
- ACQUIRE_LOCK(&lk);
- proc_waiting += 1;
- if (!timeout_pending(&proc_waiting_timeout))
- timeout_add(&proc_waiting_timeout, tickdelay > 2 ? tickdelay : 2);
-
- s = FREE_LOCK_INTERLOCKED(&lk);
- tsleep_nsec(&proc_waiting, PPAUSE, "softupdate", INFSLP);
- ACQUIRE_LOCK_INTERLOCKED(&lk, s);
- proc_waiting -= 1;
- if (islocked == 0)
- FREE_LOCK(&lk);
- return (1);
-}
-
-/*
- * Awaken processes pausing in request_cleanup and clear proc_waiting
- * to indicate that there is no longer a timer running.
- */
-void
-pause_timer(void *arg)
-{
-
- *stat_countp += 1;
- wakeup_one(&proc_waiting);
- if (proc_waiting > 0)
- timeout_add(&proc_waiting_timeout, tickdelay > 2 ? tickdelay : 2);
-}
-
-/*
- * Flush out a directory with at least one removal dependency in an effort to
- * reduce the number of dirrem, freefile, and freeblks dependency structures.
- */
-STATIC void
-clear_remove(struct proc *p)
-{
- struct pagedep_hashhead *pagedephd;
- struct pagedep *pagedep;
- static int next = 0;
- struct mount *mp;
- struct vnode *vp;
- int error, cnt;
- ufsino_t ino;
-
- ACQUIRE_LOCK(&lk);
- for (cnt = 0; cnt <= pagedep_hash; cnt++) {
- pagedephd = &pagedep_hashtbl[next++];
- if (next > pagedep_hash)
- next = 0;
- LIST_FOREACH(pagedep, pagedephd, pd_hash) {
- if (LIST_FIRST(&pagedep->pd_dirremhd) == NULL)
- continue;
- mp = pagedep->pd_mnt;
- ino = pagedep->pd_ino;
-#if 0
- if (vn_start_write(NULL, &mp, V_NOWAIT) != 0)
- continue;
-#endif
- FREE_LOCK(&lk);
- if ((error = VFS_VGET(mp, ino, &vp)) != 0) {
- softdep_error("clear_remove: vget", error);
-#if 0
- vn_finished_write(mp);
-#endif
- return;
- }
- if ((error = VOP_FSYNC(vp, p->p_ucred, MNT_NOWAIT, p)))
- softdep_error("clear_remove: fsync", error);
- drain_output(vp, 0);
- vput(vp);
-#if 0
- vn_finished_write(mp);
-#endif
- return;
- }
- }
- FREE_LOCK(&lk);
-}
-
-/*
- * Clear out a block of dirty inodes in an effort to reduce
- * the number of inodedep dependency structures.
- */
-STATIC void
-clear_inodedeps(struct proc *p)
-{
- struct inodedep_hashhead *inodedephd;
- struct inodedep *inodedep = NULL;
- static int next = 0;
- struct mount *mp;
- struct vnode *vp;
- struct fs *fs;
- int error, cnt;
- ufsino_t firstino, lastino, ino;
-
- ACQUIRE_LOCK(&lk);
- /*
- * Pick a random inode dependency to be cleared.
- * We will then gather up all the inodes in its block
- * that have dependencies and flush them out.
- */
- for (cnt = 0; cnt <= inodedep_hash; cnt++) {
- inodedephd = &inodedep_hashtbl[next++];
- if (next > inodedep_hash)
- next = 0;
- if ((inodedep = LIST_FIRST(inodedephd)) != NULL)
- break;
- }
- if (inodedep == NULL) {
- FREE_LOCK(&lk);
- return;
- }
- /*
- * Ugly code to find mount point given pointer to superblock.
- */
- fs = inodedep->id_fs;
- TAILQ_FOREACH(mp, &mountlist, mnt_list)
- if ((mp->mnt_flag & MNT_SOFTDEP) && fs == VFSTOUFS(mp)->um_fs)
- break;
- /*
- * Find the last inode in the block with dependencies.
- */
- firstino = inodedep->id_ino & ~(INOPB(fs) - 1);
- for (lastino = firstino + INOPB(fs) - 1; lastino > firstino; lastino--)
- if (inodedep_lookup(fs, lastino, 0, &inodedep) != 0)
- break;
- /*
- * Asynchronously push all but the last inode with dependencies.
- * Synchronously push the last inode with dependencies to ensure
- * that the inode block gets written to free up the inodedeps.
- */
- for (ino = firstino; ino <= lastino; ino++) {
- if (inodedep_lookup(fs, ino, 0, &inodedep) == 0)
- continue;
- FREE_LOCK(&lk);
-#if 0
- if (vn_start_write(NULL, &mp, V_NOWAIT) != 0)
- continue;
-#endif
- if ((error = VFS_VGET(mp, ino, &vp)) != 0) {
- softdep_error("clear_inodedeps: vget", error);
-#if 0
- vn_finished_write(mp);
-#endif
- return;
- }
- if (ino == lastino) {
- if ((error = VOP_FSYNC(vp, p->p_ucred, MNT_WAIT, p)))
- softdep_error("clear_inodedeps: fsync1", error);
- } else {
- if ((error = VOP_FSYNC(vp, p->p_ucred, MNT_NOWAIT, p)))
- softdep_error("clear_inodedeps: fsync2", error);
- drain_output(vp, 0);
- }
- vput(vp);
-#if 0
- vn_finished_write(mp);
-#endif
- ACQUIRE_LOCK(&lk);
- }
- FREE_LOCK(&lk);
-}
-
-/*
- * Function to determine if the buffer has outstanding dependencies
- * that will cause a roll-back if the buffer is written. If wantcount
- * is set, return number of dependencies, otherwise just yes or no.
- */
-int
-softdep_count_dependencies(struct buf *bp, int wantcount, int islocked)
-{
- struct worklist *wk;
- struct inodedep *inodedep;
- struct indirdep *indirdep;
- struct allocindir *aip;
- struct pagedep *pagedep;
- struct diradd *dap;
- int i, retval;
-
- retval = 0;
- if (!islocked)
- ACQUIRE_LOCK(&lk);
- LIST_FOREACH(wk, &bp->b_dep, wk_list) {
- switch (wk->wk_type) {
-
- case D_INODEDEP:
- inodedep = WK_INODEDEP(wk);
- if ((inodedep->id_state & DEPCOMPLETE) == 0) {
- /* bitmap allocation dependency */
- retval += 1;
- if (!wantcount)
- goto out;
- }
- if (TAILQ_FIRST(&inodedep->id_inoupdt)) {
- /* direct block pointer dependency */
- retval += 1;
- if (!wantcount)
- goto out;
- }
- continue;
-
- case D_INDIRDEP:
- indirdep = WK_INDIRDEP(wk);
-
- LIST_FOREACH(aip, &indirdep->ir_deplisthd, ai_next) {
- /* indirect block pointer dependency */
- retval += 1;
- if (!wantcount)
- goto out;
- }
- continue;
-
- case D_PAGEDEP:
- pagedep = WK_PAGEDEP(wk);
- for (i = 0; i < DAHASHSZ; i++) {
-
- LIST_FOREACH(dap, &pagedep->pd_diraddhd[i], da_pdlist) {
- /* directory entry dependency */
- retval += 1;
- if (!wantcount)
- goto out;
- }
- }
- continue;
-
- case D_BMSAFEMAP:
- case D_ALLOCDIRECT:
- case D_ALLOCINDIR:
- case D_MKDIR:
- /* never a dependency on these blocks */
- continue;
-
- default:
- if (!islocked)
- FREE_LOCK(&lk);
- panic("softdep_check_for_rollback: Unexpected type %s",
- TYPENAME(wk->wk_type));
- /* NOTREACHED */
- }
- }
-out:
- if (!islocked)
- FREE_LOCK(&lk);
- return retval;
-}
-
-/*
- * Acquire exclusive access to a buffer.
- * Must be called with splbio blocked.
- * Returns:
- * 1 if the buffer was acquired and is dirty;
- * 0 if the buffer was clean, or we would have slept but had MN_NOWAIT;
- * -1 if we slept and may try again (but not with this bp).
- */
-STATIC int
-getdirtybuf(struct buf *bp, int waitfor)
-{
- int s;
-
- if (bp == NULL)
- return (0);
-
- splassert(IPL_BIO);
-
- if (bp->b_flags & B_BUSY) {
- if (waitfor != MNT_WAIT)
- return (0);
- bp->b_flags |= B_WANTED;
- s = FREE_LOCK_INTERLOCKED(&lk);
- tsleep_nsec(bp, PRIBIO+1, "sdsdty", INFSLP);
- ACQUIRE_LOCK_INTERLOCKED(&lk, s);
- return (-1);
- }
- if ((bp->b_flags & B_DELWRI) == 0)
- return (0);
- bremfree(bp);
- buf_acquire(bp);
- return (1);
-}
-
-/*
- * Wait for pending output on a vnode to complete.
- * Must be called with vnode locked.
- */
-STATIC void
-drain_output(struct vnode *vp, int islocked)
-{
- int s;
-
- if (!islocked)
- ACQUIRE_LOCK(&lk);
-
- splassert(IPL_BIO);
-
- while (vp->v_numoutput) {
- vp->v_bioflag |= VBIOWAIT;
- s = FREE_LOCK_INTERLOCKED(&lk);
- tsleep_nsec(&vp->v_numoutput, PRIBIO+1, "drain_output", INFSLP);
- ACQUIRE_LOCK_INTERLOCKED(&lk, s);
- }
- if (!islocked)
- FREE_LOCK(&lk);
-}
-
-/*
- * Called whenever a buffer that is being invalidated or reallocated
- * contains dependencies. This should only happen if an I/O error has
- * occurred. The routine is called with the buffer locked.
- */
-void
-softdep_deallocate_dependencies(struct buf *bp)
-{
-
- if ((bp->b_flags & B_ERROR) == 0)
- panic("softdep_deallocate_dependencies: dangling deps");
- softdep_error(bp->b_vp->v_mount->mnt_stat.f_mntonname, bp->b_error);
- panic("softdep_deallocate_dependencies: unrecovered I/O error");
-}
-
-/*
- * Function to handle asynchronous write errors in the filesystem.
- */
-void
-softdep_error(char *func, int error)
-{
-
- /* XXX should do something better! */
- printf("%s: got error %d while accessing filesystem\n", func, error);
-}
-
-#ifdef DDB
-#include <machine/db_machdep.h>
-#include <ddb/db_interface.h>
-#include <ddb/db_output.h>
-
-void
-softdep_print(struct buf *bp, int full,
- int (*pr)(const char *, ...) __attribute__((__format__(__kprintf__,1,2))))
-{
- struct worklist *wk;
-
- (*pr)(" deps:\n");
- LIST_FOREACH(wk, &bp->b_dep, wk_list)
- worklist_print(wk, full, pr);
-}
-
-void
-worklist_print(struct worklist *wk, int full,
- int (*pr)(const char *, ...) __attribute__((__format__(__kprintf__,1,2))))
-{
- struct pagedep *pagedep;
- struct inodedep *inodedep;
- struct newblk *newblk;
- struct bmsafemap *bmsafemap;
- struct allocdirect *adp;
- struct indirdep *indirdep;
- struct allocindir *aip;
- struct freefrag *freefrag;
- struct freeblks *freeblks;
- struct freefile *freefile;
- struct diradd *dap;
- struct mkdir *mkdir;
- struct dirrem *dirrem;
- struct newdirblk *newdirblk;
- char prefix[33];
- int i;
-
- for (prefix[i = 2 * MIN(16, full)] = '\0'; i--; prefix[i] = ' ')
- ;
-
- (*pr)("%s%s(%p) state %b\n%s", prefix, TYPENAME(wk->wk_type), wk,
- wk->wk_state, DEP_BITS, prefix);
- switch (wk->wk_type) {
- case D_PAGEDEP:
- pagedep = WK_PAGEDEP(wk);
- (*pr)("mount %p ino %u lbn %lld\n", pagedep->pd_mnt,
- pagedep->pd_ino, (long long)pagedep->pd_lbn);
- break;
- case D_INODEDEP:
- inodedep = WK_INODEDEP(wk);
- (*pr)("fs %p ino %u nlinkdelta %u dino %p\n"
- "%s bp %p savsz %lld\n", inodedep->id_fs,
- inodedep->id_ino, inodedep->id_nlinkdelta,
- inodedep->id_un.idu_savedino1,
- prefix, inodedep->id_buf, inodedep->id_savedsize);
- break;
- case D_NEWBLK:
- newblk = WK_NEWBLK(wk);
- (*pr)("fs %p newblk %lld state %d bmsafemap %p\n",
- newblk->nb_fs, (long long)newblk->nb_newblkno,
- newblk->nb_state, newblk->nb_bmsafemap);
- break;
- case D_BMSAFEMAP:
- bmsafemap = WK_BMSAFEMAP(wk);
- (*pr)("buf %p\n", bmsafemap->sm_buf);
- break;
- case D_ALLOCDIRECT:
- adp = WK_ALLOCDIRECT(wk);
- (*pr)("lbn %lld newlbk %lld oldblk %lld newsize %ld olsize "
- "%ld\n%s bp %p inodedep %p freefrag %p\n",
- (long long)adp->ad_lbn, (long long)adp->ad_newblkno,
- (long long)adp->ad_oldblkno, adp->ad_newsize,
- adp->ad_oldsize,
- prefix, adp->ad_buf, adp->ad_inodedep, adp->ad_freefrag);
- break;
- case D_INDIRDEP:
- indirdep = WK_INDIRDEP(wk);
- (*pr)("savedata %p savebp %p\n", indirdep->ir_saveddata,
- indirdep->ir_savebp);
- break;
- case D_ALLOCINDIR:
- aip = WK_ALLOCINDIR(wk);
- (*pr)("off %d newblk %lld oldblk %lld freefrag %p\n"
- "%s indirdep %p buf %p\n", aip->ai_offset,
- (long long)aip->ai_newblkno, (long long)aip->ai_oldblkno,
- aip->ai_freefrag, prefix, aip->ai_indirdep, aip->ai_buf);
- break;
- case D_FREEFRAG:
- freefrag = WK_FREEFRAG(wk);
- (*pr)("vnode %p mp %p blkno %lld fsize %ld ino %u\n",
- freefrag->ff_devvp, freefrag->ff_mnt,
- (long long)freefrag->ff_blkno, freefrag->ff_fragsize,
- freefrag->ff_inum);
- break;
- case D_FREEBLKS:
- freeblks = WK_FREEBLKS(wk);
- (*pr)("previno %u devvp %p mp %p oldsz %lld newsz %lld\n"
- "%s chkcnt %d uid %d\n", freeblks->fb_previousinum,
- freeblks->fb_devvp, freeblks->fb_mnt, freeblks->fb_oldsize,
- freeblks->fb_newsize,
- prefix, freeblks->fb_chkcnt, freeblks->fb_uid);
- break;
- case D_FREEFILE:
- freefile = WK_FREEFILE(wk);
- (*pr)("mode %x oldino %u vnode %p mp %p\n", freefile->fx_mode,
- freefile->fx_oldinum, freefile->fx_devvp, freefile->fx_mnt);
- break;
- case D_DIRADD:
- dap = WK_DIRADD(wk);
- (*pr)("off %d ino %u da_un %p\n", dap->da_offset,
- dap->da_newinum, dap->da_un.dau_previous);
- break;
- case D_MKDIR:
- mkdir = WK_MKDIR(wk);
- (*pr)("diradd %p bp %p\n", mkdir->md_diradd, mkdir->md_buf);
- break;
- case D_DIRREM:
- dirrem = WK_DIRREM(wk);
- (*pr)("mp %p ino %u dm_un %p\n", dirrem->dm_mnt,
- dirrem->dm_oldinum, dirrem->dm_un.dmu_pagedep);
- break;
- case D_NEWDIRBLK:
- newdirblk = WK_NEWDIRBLK(wk);
- (*pr)("pagedep %p\n", newdirblk->db_pagedep);
- break;
- }
-}
-#endif
projects / openbsd / commitdiff