1c4bcd050a
td_ru. This removes the requirement for per-process synchronization in statclock() and mi_switch(). This was previously supported by sched_lock which is going away. All modifications to rusage are now done in the context of the owning thread. reads proceed without locks. - Aggregate exiting threads rusage in thread_exit() such that the exiting thread's rusage is not lost. - Provide a new routine, rufetch() to fetch an aggregate of all rusage structures from all threads in a process. This routine must be used in any place requiring a rusage from a process prior to it's exit. The exited process's rusage is still available via p_ru. - Aggregate tick statistics only on demand via rufetch() or when a thread exits. Tick statistics are kept in the thread and protected by sched_lock until it exits. Initial patch by: attilio Reviewed by: attilio, bde (some objections), arch (mostly silent)
648 lines
19 KiB
C
648 lines
19 KiB
C
/*-
|
|
* Copyright (c) 1982, 1986, 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* 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.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
|
|
*
|
|
* @(#)ffs_inode.c 8.13 (Berkeley) 4/21/95
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_quota.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/bio.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/resourcevar.h>
|
|
#include <sys/vmmeter.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_extern.h>
|
|
|
|
#include <ufs/ufs/extattr.h>
|
|
#include <ufs/ufs/quota.h>
|
|
#include <ufs/ufs/ufsmount.h>
|
|
#include <ufs/ufs/inode.h>
|
|
#include <ufs/ufs/ufs_extern.h>
|
|
|
|
#include <ufs/ffs/fs.h>
|
|
#include <ufs/ffs/ffs_extern.h>
|
|
|
|
static int ffs_indirtrunc(struct inode *, ufs2_daddr_t, ufs2_daddr_t,
|
|
ufs2_daddr_t, int, ufs2_daddr_t *);
|
|
|
|
/*
|
|
* Update the access, modified, and inode change times as specified by the
|
|
* IN_ACCESS, IN_UPDATE, and IN_CHANGE flags respectively. Write the inode
|
|
* to disk if the IN_MODIFIED flag is set (it may be set initially, or by
|
|
* the timestamp update). The IN_LAZYMOD flag is set to force a write
|
|
* later if not now. The IN_LAZYACCESS is set instead of IN_MODIFIED if the fs
|
|
* is currently being suspended (or is suspended) and vnode has been accessed.
|
|
* If we write now, then clear IN_MODIFIED, IN_LAZYACCESS and IN_LAZYMOD to
|
|
* reflect the presumably successful write, and if waitfor is set, then wait
|
|
* for the write to complete.
|
|
*/
|
|
int
|
|
ffs_update(vp, waitfor)
|
|
struct vnode *vp;
|
|
int waitfor;
|
|
{
|
|
struct fs *fs;
|
|
struct buf *bp;
|
|
struct inode *ip;
|
|
int error;
|
|
|
|
ASSERT_VOP_ELOCKED(vp, "ffs_update");
|
|
ufs_itimes(vp);
|
|
ip = VTOI(vp);
|
|
if ((ip->i_flag & IN_MODIFIED) == 0 && waitfor == 0)
|
|
return (0);
|
|
ip->i_flag &= ~(IN_LAZYACCESS | IN_LAZYMOD | IN_MODIFIED);
|
|
fs = ip->i_fs;
|
|
if (fs->fs_ronly)
|
|
return (0);
|
|
/*
|
|
* Ensure that uid and gid are correct. This is a temporary
|
|
* fix until fsck has been changed to do the update.
|
|
*/
|
|
if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */
|
|
fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */
|
|
ip->i_din1->di_ouid = ip->i_uid; /* XXX */
|
|
ip->i_din1->di_ogid = ip->i_gid; /* XXX */
|
|
} /* XXX */
|
|
error = bread(ip->i_devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
|
|
(int)fs->fs_bsize, NOCRED, &bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
return (error);
|
|
}
|
|
if (DOINGSOFTDEP(vp))
|
|
softdep_update_inodeblock(ip, bp, waitfor);
|
|
else if (ip->i_effnlink != ip->i_nlink)
|
|
panic("ffs_update: bad link cnt");
|
|
if (ip->i_ump->um_fstype == 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;
|
|
if (waitfor && !DOINGASYNC(vp)) {
|
|
return (bwrite(bp));
|
|
} else if (vm_page_count_severe() || buf_dirty_count_severe()) {
|
|
return (bwrite(bp));
|
|
} else {
|
|
if (bp->b_bufsize == fs->fs_bsize)
|
|
bp->b_flags |= B_CLUSTEROK;
|
|
bdwrite(bp);
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
#define SINGLE 0 /* index of single indirect block */
|
|
#define DOUBLE 1 /* index of double indirect block */
|
|
#define TRIPLE 2 /* index of triple indirect block */
|
|
/*
|
|
* Truncate the inode ip to at most length size, freeing the
|
|
* disk blocks.
|
|
*/
|
|
int
|
|
ffs_truncate(vp, length, flags, cred, td)
|
|
struct vnode *vp;
|
|
off_t length;
|
|
int flags;
|
|
struct ucred *cred;
|
|
struct thread *td;
|
|
{
|
|
struct inode *ip;
|
|
ufs2_daddr_t bn, lbn, lastblock, lastiblock[NIADDR], indir_lbn[NIADDR];
|
|
ufs2_daddr_t oldblks[NDADDR + NIADDR], newblks[NDADDR + NIADDR];
|
|
ufs2_daddr_t count, blocksreleased = 0, datablocks;
|
|
struct fs *fs;
|
|
struct buf *bp;
|
|
struct ufsmount *ump;
|
|
int needextclean, softdepslowdown, extblocks;
|
|
int offset, size, level, nblocks;
|
|
int i, error, allerror;
|
|
off_t osize;
|
|
|
|
ip = VTOI(vp);
|
|
fs = ip->i_fs;
|
|
ump = ip->i_ump;
|
|
|
|
ASSERT_VOP_LOCKED(vp, "ffs_truncate");
|
|
|
|
if (length < 0)
|
|
return (EINVAL);
|
|
/*
|
|
* Historically clients did not have to specify which data
|
|
* they were truncating. So, if not specified, we assume
|
|
* traditional behavior, e.g., just the normal data.
|
|
*/
|
|
if ((flags & (IO_EXT | IO_NORMAL)) == 0)
|
|
flags |= IO_NORMAL;
|
|
/*
|
|
* If we are truncating the extended-attributes, and cannot
|
|
* do it with soft updates, then do it slowly here. If we are
|
|
* truncating both the extended attributes and the file contents
|
|
* (e.g., the file is being unlinked), then pick it off with
|
|
* soft updates below.
|
|
*/
|
|
needextclean = 0;
|
|
softdepslowdown = DOINGSOFTDEP(vp) && softdep_slowdown(vp);
|
|
extblocks = 0;
|
|
datablocks = DIP(ip, i_blocks);
|
|
if (fs->fs_magic == FS_UFS2_MAGIC && ip->i_din2->di_extsize > 0) {
|
|
extblocks = btodb(fragroundup(fs, ip->i_din2->di_extsize));
|
|
datablocks -= extblocks;
|
|
}
|
|
if ((flags & IO_EXT) && extblocks > 0) {
|
|
if (DOINGSOFTDEP(vp) && softdepslowdown == 0 && length == 0) {
|
|
if ((flags & IO_NORMAL) == 0) {
|
|
softdep_setup_freeblocks(ip, length, IO_EXT);
|
|
return (0);
|
|
}
|
|
needextclean = 1;
|
|
} else {
|
|
if (length != 0)
|
|
panic("ffs_truncate: partial trunc of extdata");
|
|
if ((error = ffs_syncvnode(vp, MNT_WAIT)) != 0)
|
|
return (error);
|
|
osize = ip->i_din2->di_extsize;
|
|
ip->i_din2->di_blocks -= extblocks;
|
|
#ifdef QUOTA
|
|
(void) chkdq(ip, -extblocks, NOCRED, 0);
|
|
#endif
|
|
vinvalbuf(vp, V_ALT, td, 0, 0);
|
|
ip->i_din2->di_extsize = 0;
|
|
for (i = 0; i < NXADDR; i++) {
|
|
oldblks[i] = ip->i_din2->di_extb[i];
|
|
ip->i_din2->di_extb[i] = 0;
|
|
}
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
if ((error = ffs_update(vp, 1)))
|
|
return (error);
|
|
for (i = 0; i < NXADDR; i++) {
|
|
if (oldblks[i] == 0)
|
|
continue;
|
|
ffs_blkfree(ump, fs, ip->i_devvp, oldblks[i],
|
|
sblksize(fs, osize, i), ip->i_number);
|
|
}
|
|
}
|
|
}
|
|
if ((flags & IO_NORMAL) == 0)
|
|
return (0);
|
|
if (length > fs->fs_maxfilesize)
|
|
return (EFBIG);
|
|
if (vp->v_type == VLNK &&
|
|
(ip->i_size < vp->v_mount->mnt_maxsymlinklen ||
|
|
datablocks == 0)) {
|
|
#ifdef DIAGNOSTIC
|
|
if (length != 0)
|
|
panic("ffs_truncate: partial truncate of symlink");
|
|
#endif
|
|
bzero(SHORTLINK(ip), (u_int)ip->i_size);
|
|
ip->i_size = 0;
|
|
DIP_SET(ip, i_size, 0);
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
if (needextclean)
|
|
softdep_setup_freeblocks(ip, length, IO_EXT);
|
|
return (ffs_update(vp, 1));
|
|
}
|
|
if (ip->i_size == length) {
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
if (needextclean)
|
|
softdep_setup_freeblocks(ip, length, IO_EXT);
|
|
return (ffs_update(vp, 0));
|
|
}
|
|
if (fs->fs_ronly)
|
|
panic("ffs_truncate: read-only filesystem");
|
|
#ifdef QUOTA
|
|
error = getinoquota(ip);
|
|
if (error)
|
|
return (error);
|
|
#endif
|
|
if ((ip->i_flags & SF_SNAPSHOT) != 0)
|
|
ffs_snapremove(vp);
|
|
vp->v_lasta = vp->v_clen = vp->v_cstart = vp->v_lastw = 0;
|
|
if (DOINGSOFTDEP(vp)) {
|
|
if (length > 0 || softdepslowdown) {
|
|
/*
|
|
* If a file is only partially truncated, then
|
|
* we have to clean up the data structures
|
|
* describing the allocation past the truncation
|
|
* point. Finding and deallocating those structures
|
|
* is a lot of work. Since partial truncation occurs
|
|
* rarely, we solve the problem by syncing the file
|
|
* so that it will have no data structures left.
|
|
*/
|
|
if ((error = ffs_syncvnode(vp, MNT_WAIT)) != 0)
|
|
return (error);
|
|
UFS_LOCK(ump);
|
|
if (ip->i_flag & IN_SPACECOUNTED)
|
|
fs->fs_pendingblocks -= datablocks;
|
|
UFS_UNLOCK(ump);
|
|
} else {
|
|
#ifdef QUOTA
|
|
(void) chkdq(ip, -datablocks, NOCRED, 0);
|
|
#endif
|
|
softdep_setup_freeblocks(ip, length, needextclean ?
|
|
IO_EXT | IO_NORMAL : IO_NORMAL);
|
|
ASSERT_VOP_LOCKED(vp, "ffs_truncate1");
|
|
vinvalbuf(vp, needextclean ? 0 : V_NORMAL, td, 0, 0);
|
|
vnode_pager_setsize(vp, 0);
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
return (ffs_update(vp, 0));
|
|
}
|
|
}
|
|
osize = ip->i_size;
|
|
/*
|
|
* Lengthen the size of the file. We must ensure that the
|
|
* last byte of the file is allocated. Since the smallest
|
|
* value of osize is 0, length will be at least 1.
|
|
*/
|
|
if (osize < length) {
|
|
vnode_pager_setsize(vp, length);
|
|
flags |= BA_CLRBUF;
|
|
error = UFS_BALLOC(vp, length - 1, 1, cred, flags, &bp);
|
|
if (error)
|
|
return (error);
|
|
ip->i_size = length;
|
|
DIP_SET(ip, i_size, length);
|
|
if (bp->b_bufsize == fs->fs_bsize)
|
|
bp->b_flags |= B_CLUSTEROK;
|
|
if (flags & IO_SYNC)
|
|
bwrite(bp);
|
|
else
|
|
bawrite(bp);
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
return (ffs_update(vp, 1));
|
|
}
|
|
/*
|
|
* Shorten the size of the file. If the file is not being
|
|
* truncated to a block boundary, the contents of the
|
|
* partial block following the end of the file must be
|
|
* zero'ed in case it ever becomes accessible again because
|
|
* of subsequent file growth. Directories however are not
|
|
* zero'ed as they should grow back initialized to empty.
|
|
*/
|
|
offset = blkoff(fs, length);
|
|
if (offset == 0) {
|
|
ip->i_size = length;
|
|
DIP_SET(ip, i_size, length);
|
|
} else {
|
|
lbn = lblkno(fs, length);
|
|
flags |= BA_CLRBUF;
|
|
error = UFS_BALLOC(vp, length - 1, 1, cred, flags, &bp);
|
|
if (error) {
|
|
return (error);
|
|
}
|
|
/*
|
|
* When we are doing soft updates and the UFS_BALLOC
|
|
* above fills in a direct block hole with a full sized
|
|
* block that will be truncated down to a fragment below,
|
|
* we must flush out the block dependency with an FSYNC
|
|
* so that we do not get a soft updates inconsistency
|
|
* when we create the fragment below.
|
|
*/
|
|
if (DOINGSOFTDEP(vp) && lbn < NDADDR &&
|
|
fragroundup(fs, blkoff(fs, length)) < fs->fs_bsize &&
|
|
(error = ffs_syncvnode(vp, MNT_WAIT)) != 0)
|
|
return (error);
|
|
ip->i_size = length;
|
|
DIP_SET(ip, i_size, length);
|
|
size = blksize(fs, ip, lbn);
|
|
if (vp->v_type != VDIR)
|
|
bzero((char *)bp->b_data + offset,
|
|
(u_int)(size - offset));
|
|
/* Kirk's code has reallocbuf(bp, size, 1) here */
|
|
allocbuf(bp, size);
|
|
if (bp->b_bufsize == fs->fs_bsize)
|
|
bp->b_flags |= B_CLUSTEROK;
|
|
if (flags & IO_SYNC)
|
|
bwrite(bp);
|
|
else
|
|
bawrite(bp);
|
|
}
|
|
/*
|
|
* Calculate index into inode's block list of
|
|
* last direct and indirect blocks (if any)
|
|
* which we want to keep. Lastblock is -1 when
|
|
* the file is truncated to 0.
|
|
*/
|
|
lastblock = lblkno(fs, length + fs->fs_bsize - 1) - 1;
|
|
lastiblock[SINGLE] = lastblock - NDADDR;
|
|
lastiblock[DOUBLE] = lastiblock[SINGLE] - NINDIR(fs);
|
|
lastiblock[TRIPLE] = lastiblock[DOUBLE] - NINDIR(fs) * NINDIR(fs);
|
|
nblocks = btodb(fs->fs_bsize);
|
|
/*
|
|
* Update file and block pointers on disk before we start freeing
|
|
* blocks. If we crash before free'ing blocks below, the blocks
|
|
* will be returned to the free list. lastiblock values are also
|
|
* normalized to -1 for calls to ffs_indirtrunc below.
|
|
*/
|
|
for (level = TRIPLE; level >= SINGLE; level--) {
|
|
oldblks[NDADDR + level] = DIP(ip, i_ib[level]);
|
|
if (lastiblock[level] < 0) {
|
|
DIP_SET(ip, i_ib[level], 0);
|
|
lastiblock[level] = -1;
|
|
}
|
|
}
|
|
for (i = 0; i < NDADDR; i++) {
|
|
oldblks[i] = DIP(ip, i_db[i]);
|
|
if (i > lastblock)
|
|
DIP_SET(ip, i_db[i], 0);
|
|
}
|
|
ip->i_flag |= IN_CHANGE | IN_UPDATE;
|
|
allerror = ffs_update(vp, 1);
|
|
|
|
/*
|
|
* Having written the new inode to disk, save its new configuration
|
|
* and put back the old block pointers long enough to process them.
|
|
* Note that we save the new block configuration so we can check it
|
|
* when we are done.
|
|
*/
|
|
for (i = 0; i < NDADDR; i++) {
|
|
newblks[i] = DIP(ip, i_db[i]);
|
|
DIP_SET(ip, i_db[i], oldblks[i]);
|
|
}
|
|
for (i = 0; i < NIADDR; i++) {
|
|
newblks[NDADDR + i] = DIP(ip, i_ib[i]);
|
|
DIP_SET(ip, i_ib[i], oldblks[NDADDR + i]);
|
|
}
|
|
ip->i_size = osize;
|
|
DIP_SET(ip, i_size, osize);
|
|
|
|
error = vtruncbuf(vp, cred, td, length, fs->fs_bsize);
|
|
if (error && (allerror == 0))
|
|
allerror = error;
|
|
|
|
/*
|
|
* Indirect blocks first.
|
|
*/
|
|
indir_lbn[SINGLE] = -NDADDR;
|
|
indir_lbn[DOUBLE] = indir_lbn[SINGLE] - NINDIR(fs) - 1;
|
|
indir_lbn[TRIPLE] = indir_lbn[DOUBLE] - NINDIR(fs) * NINDIR(fs) - 1;
|
|
for (level = TRIPLE; level >= SINGLE; level--) {
|
|
bn = DIP(ip, i_ib[level]);
|
|
if (bn != 0) {
|
|
error = ffs_indirtrunc(ip, indir_lbn[level],
|
|
fsbtodb(fs, bn), lastiblock[level], level, &count);
|
|
if (error)
|
|
allerror = error;
|
|
blocksreleased += count;
|
|
if (lastiblock[level] < 0) {
|
|
DIP_SET(ip, i_ib[level], 0);
|
|
ffs_blkfree(ump, fs, ip->i_devvp, bn,
|
|
fs->fs_bsize, ip->i_number);
|
|
blocksreleased += nblocks;
|
|
}
|
|
}
|
|
if (lastiblock[level] >= 0)
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* All whole direct blocks or frags.
|
|
*/
|
|
for (i = NDADDR - 1; i > lastblock; i--) {
|
|
long bsize;
|
|
|
|
bn = DIP(ip, i_db[i]);
|
|
if (bn == 0)
|
|
continue;
|
|
DIP_SET(ip, i_db[i], 0);
|
|
bsize = blksize(fs, ip, i);
|
|
ffs_blkfree(ump, fs, ip->i_devvp, bn, bsize, ip->i_number);
|
|
blocksreleased += btodb(bsize);
|
|
}
|
|
if (lastblock < 0)
|
|
goto done;
|
|
|
|
/*
|
|
* Finally, look for a change in size of the
|
|
* last direct block; release any frags.
|
|
*/
|
|
bn = DIP(ip, i_db[lastblock]);
|
|
if (bn != 0) {
|
|
long oldspace, newspace;
|
|
|
|
/*
|
|
* Calculate amount of space we're giving
|
|
* back as old block size minus new block size.
|
|
*/
|
|
oldspace = blksize(fs, ip, lastblock);
|
|
ip->i_size = length;
|
|
DIP_SET(ip, i_size, length);
|
|
newspace = blksize(fs, ip, lastblock);
|
|
if (newspace == 0)
|
|
panic("ffs_truncate: newspace");
|
|
if (oldspace - newspace > 0) {
|
|
/*
|
|
* Block number of space to be free'd is
|
|
* the old block # plus the number of frags
|
|
* required for the storage we're keeping.
|
|
*/
|
|
bn += numfrags(fs, newspace);
|
|
ffs_blkfree(ump, fs, ip->i_devvp, bn,
|
|
oldspace - newspace, ip->i_number);
|
|
blocksreleased += btodb(oldspace - newspace);
|
|
}
|
|
}
|
|
done:
|
|
#ifdef DIAGNOSTIC
|
|
for (level = SINGLE; level <= TRIPLE; level++)
|
|
if (newblks[NDADDR + level] != DIP(ip, i_ib[level]))
|
|
panic("ffs_truncate1");
|
|
for (i = 0; i < NDADDR; i++)
|
|
if (newblks[i] != DIP(ip, i_db[i]))
|
|
panic("ffs_truncate2");
|
|
VI_LOCK(vp);
|
|
if (length == 0 &&
|
|
(fs->fs_magic != FS_UFS2_MAGIC || ip->i_din2->di_extsize == 0) &&
|
|
(vp->v_bufobj.bo_dirty.bv_cnt > 0 ||
|
|
vp->v_bufobj.bo_clean.bv_cnt > 0))
|
|
panic("ffs_truncate3");
|
|
VI_UNLOCK(vp);
|
|
#endif /* DIAGNOSTIC */
|
|
/*
|
|
* Put back the real size.
|
|
*/
|
|
ip->i_size = length;
|
|
DIP_SET(ip, i_size, length);
|
|
DIP_SET(ip, i_blocks, DIP(ip, i_blocks) - blocksreleased);
|
|
|
|
if (DIP(ip, i_blocks) < 0) /* sanity */
|
|
DIP_SET(ip, i_blocks, 0);
|
|
ip->i_flag |= IN_CHANGE;
|
|
#ifdef QUOTA
|
|
(void) chkdq(ip, -blocksreleased, NOCRED, 0);
|
|
#endif
|
|
return (allerror);
|
|
}
|
|
|
|
/*
|
|
* Release blocks associated with the inode ip and stored in the indirect
|
|
* block bn. Blocks are free'd in LIFO order up to (but not including)
|
|
* lastbn. 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
|
|
ffs_indirtrunc(ip, lbn, dbn, lastbn, level, countp)
|
|
struct inode *ip;
|
|
ufs2_daddr_t lbn, lastbn;
|
|
ufs2_daddr_t dbn;
|
|
int level;
|
|
ufs2_daddr_t *countp;
|
|
{
|
|
struct buf *bp;
|
|
struct fs *fs = ip->i_fs;
|
|
struct vnode *vp;
|
|
caddr_t copy = NULL;
|
|
int i, nblocks, error = 0, allerror = 0;
|
|
ufs2_daddr_t nb, nlbn, last;
|
|
ufs2_daddr_t blkcount, factor, blocksreleased = 0;
|
|
ufs1_daddr_t *bap1 = NULL;
|
|
ufs2_daddr_t *bap2 = NULL;
|
|
# define BAP(ip, i) (((ip)->i_ump->um_fstype == UFS1) ? bap1[i] : bap2[i])
|
|
|
|
/*
|
|
* Calculate index in current block of last
|
|
* block to be kept. -1 indicates the entire
|
|
* block so we need not calculate the index.
|
|
*/
|
|
factor = 1;
|
|
for (i = SINGLE; i < level; i++)
|
|
factor *= NINDIR(fs);
|
|
last = lastbn;
|
|
if (lastbn > 0)
|
|
last /= factor;
|
|
nblocks = btodb(fs->fs_bsize);
|
|
/*
|
|
* Get buffer of block pointers, zero those entries corresponding
|
|
* to blocks to be free'd, and update on disk copy first. Since
|
|
* double(triple) indirect before single(double) indirect, calls
|
|
* to bmap on these blocks will fail. However, we already have
|
|
* the on disk address, so we have to set the b_blkno field
|
|
* explicitly instead of letting bread do everything for us.
|
|
*/
|
|
vp = ITOV(ip);
|
|
bp = getblk(vp, lbn, (int)fs->fs_bsize, 0, 0, 0);
|
|
if ((bp->b_flags & B_CACHE) == 0) {
|
|
curthread->td_ru.ru_inblock++; /* pay for read */
|
|
bp->b_iocmd = BIO_READ;
|
|
bp->b_flags &= ~B_INVAL;
|
|
bp->b_ioflags &= ~BIO_ERROR;
|
|
if (bp->b_bcount > bp->b_bufsize)
|
|
panic("ffs_indirtrunc: bad buffer size");
|
|
bp->b_blkno = dbn;
|
|
vfs_busy_pages(bp, 0);
|
|
bp->b_iooffset = dbtob(bp->b_blkno);
|
|
bstrategy(bp);
|
|
error = bufwait(bp);
|
|
}
|
|
if (error) {
|
|
brelse(bp);
|
|
*countp = 0;
|
|
return (error);
|
|
}
|
|
|
|
if (ip->i_ump->um_fstype == UFS1)
|
|
bap1 = (ufs1_daddr_t *)bp->b_data;
|
|
else
|
|
bap2 = (ufs2_daddr_t *)bp->b_data;
|
|
if (lastbn != -1) {
|
|
MALLOC(copy, caddr_t, fs->fs_bsize, M_TEMP, M_WAITOK);
|
|
bcopy((caddr_t)bp->b_data, copy, (u_int)fs->fs_bsize);
|
|
for (i = last + 1; i < NINDIR(fs); i++)
|
|
if (ip->i_ump->um_fstype == UFS1)
|
|
bap1[i] = 0;
|
|
else
|
|
bap2[i] = 0;
|
|
if (DOINGASYNC(vp)) {
|
|
bawrite(bp);
|
|
} else {
|
|
error = bwrite(bp);
|
|
if (error)
|
|
allerror = error;
|
|
}
|
|
if (ip->i_ump->um_fstype == UFS1)
|
|
bap1 = (ufs1_daddr_t *)copy;
|
|
else
|
|
bap2 = (ufs2_daddr_t *)copy;
|
|
}
|
|
|
|
/*
|
|
* Recursively free totally unused blocks.
|
|
*/
|
|
for (i = NINDIR(fs) - 1, nlbn = lbn + 1 - i * factor; i > last;
|
|
i--, nlbn += factor) {
|
|
nb = BAP(ip, i);
|
|
if (nb == 0)
|
|
continue;
|
|
if (level > SINGLE) {
|
|
if ((error = ffs_indirtrunc(ip, nlbn, fsbtodb(fs, nb),
|
|
(ufs2_daddr_t)-1, level - 1, &blkcount)) != 0)
|
|
allerror = error;
|
|
blocksreleased += blkcount;
|
|
}
|
|
ffs_blkfree(ip->i_ump, fs, ip->i_devvp, nb, fs->fs_bsize,
|
|
ip->i_number);
|
|
blocksreleased += nblocks;
|
|
}
|
|
|
|
/*
|
|
* Recursively free last partial block.
|
|
*/
|
|
if (level > SINGLE && lastbn >= 0) {
|
|
last = lastbn % factor;
|
|
nb = BAP(ip, i);
|
|
if (nb != 0) {
|
|
error = ffs_indirtrunc(ip, nlbn, fsbtodb(fs, nb),
|
|
last, level - 1, &blkcount);
|
|
if (error)
|
|
allerror = error;
|
|
blocksreleased += blkcount;
|
|
}
|
|
}
|
|
if (copy != NULL) {
|
|
FREE(copy, M_TEMP);
|
|
} else {
|
|
bp->b_flags |= B_INVAL | B_NOCACHE;
|
|
brelse(bp);
|
|
}
|
|
|
|
*countp = blocksreleased;
|
|
return (allerror);
|
|
}
|