blob: e161c2852e0e5d9414e7f9c5109487c502c664cb [file] [log] [blame]
/*
* Copyright (c) 2000-2001,2005-2006 Silicon Graphics, Inc.
* Copyright (C) 2010 Red Hat, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libxfs_priv.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode_buf.h"
#include "xfs_inode_fork.h"
#include "xfs_inode.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
static void xfs_trans_free_items(struct xfs_trans *tp);
/*
* Simple transaction interface
*/
kmem_zone_t *xfs_log_item_desc_zone;
/*
* Initialize the precomputed transaction reservation values
* in the mount structure.
*/
void
libxfs_trans_init(
struct xfs_mount *mp)
{
xfs_trans_resv_calc(mp, &mp->m_resv);
}
/*
* Add the given log item to the transaction's list of log items.
*
* The log item will now point to its new descriptor with its li_desc field.
*/
void
libxfs_trans_add_item(
struct xfs_trans *tp,
struct xfs_log_item *lip)
{
struct xfs_log_item_desc *lidp;
ASSERT(lip->li_mountp == tp->t_mountp);
ASSERT(lip->li_ailp == tp->t_mountp->m_ail);
lidp = calloc(sizeof(struct xfs_log_item_desc), 1);
if (!lidp) {
fprintf(stderr, _("%s: lidp calloc failed (%d bytes): %s\n"),
progname, (int)sizeof(struct xfs_log_item_desc),
strerror(errno));
exit(1);
}
lidp->lid_item = lip;
lidp->lid_flags = 0;
list_add_tail(&lidp->lid_trans, &tp->t_items);
lip->li_desc = lidp;
}
/*
* Unlink and free the given descriptor.
*/
void
libxfs_trans_del_item(
struct xfs_log_item *lip)
{
list_del_init(&lip->li_desc->lid_trans);
free(lip->li_desc);
lip->li_desc = NULL;
}
/*
* Roll from one trans in the sequence of PERMANENT transactions to
* the next: permanent transactions are only flushed out when
* committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon
* as possible to let chunks of it go to the log. So we commit the
* chunk we've been working on and get a new transaction to continue.
*/
int
libxfs_trans_roll(
struct xfs_trans **tpp,
struct xfs_inode *dp)
{
struct xfs_mount *mp;
struct xfs_trans *trans;
struct xfs_trans_res tres;
int error;
/*
* Ensure that the inode is always logged.
*/
trans = *tpp;
if (dp)
xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE);
/*
* Copy the critical parameters from one trans to the next.
*/
mp = trans->t_mountp;
tres.tr_logres = trans->t_log_res;
tres.tr_logcount = trans->t_log_count;
/*
* Commit the current transaction.
* If this commit failed, then it'd just unlock those items that
* are marked to be released. That also means that a filesystem shutdown
* is in progress. The caller takes the responsibility to cancel
* the duplicate transaction that gets returned.
*/
error = xfs_trans_commit(trans);
if (error)
return error;
/*
* Reserve space in the log for th next transaction.
* This also pushes items in the "AIL", the list of logged items,
* out to disk if they are taking up space at the tail of the log
* that we want to use. This requires that either nothing be locked
* across this call, or that anything that is locked be logged in
* the prior and the next transactions.
*/
tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
error = libxfs_trans_alloc(mp, &tres, 0, 0, 0, tpp);
trans = *tpp;
/*
* Ensure that the inode is in the new transaction and locked.
*/
if (error)
return error;
if (dp)
xfs_trans_ijoin(trans, dp, 0);
return 0;
}
int
libxfs_trans_alloc(
struct xfs_mount *mp,
struct xfs_trans_res *resp,
unsigned int blocks,
unsigned int rtextents,
unsigned int flags,
struct xfs_trans **tpp)
{
struct xfs_sb *sb = &mp->m_sb;
struct xfs_trans *ptr;
/*
* Attempt to reserve the needed disk blocks by decrementing
* the number needed from the number available. This will
* fail if the count would go below zero.
*/
if (blocks > 0) {
if (sb->sb_fdblocks < blocks)
return -ENOSPC;
}
if ((ptr = calloc(sizeof(xfs_trans_t), 1)) == NULL) {
fprintf(stderr, _("%s: xact calloc failed (%d bytes): %s\n"),
progname, (int)sizeof(xfs_trans_t), strerror(errno));
exit(1);
}
ptr->t_mountp = mp;
INIT_LIST_HEAD(&ptr->t_items);
#ifdef XACT_DEBUG
fprintf(stderr, "allocated new transaction %p\n", ptr);
#endif
*tpp = ptr;
return 0;
}
/*
* Create an empty transaction with no reservation. This is a defensive
* mechanism for routines that query metadata without actually modifying
* them -- if the metadata being queried is somehow cross-linked (think a
* btree block pointer that points higher in the tree), we risk deadlock.
* However, blocks grabbed as part of a transaction can be re-grabbed.
* The verifiers will notice the corrupt block and the operation will fail
* back to userspace without deadlocking.
*
* Note the zero-length reservation; this transaction MUST be cancelled
* without any dirty data.
*/
int
libxfs_trans_alloc_empty(
struct xfs_mount *mp,
struct xfs_trans **tpp)
{
struct xfs_trans_res resv = {0};
return xfs_trans_alloc(mp, &resv, 0, 0, XFS_TRANS_NO_WRITECOUNT, tpp);
}
void
libxfs_trans_cancel(
xfs_trans_t *tp)
{
#ifdef XACT_DEBUG
xfs_trans_t *otp = tp;
#endif
if (tp != NULL) {
xfs_trans_free_items(tp);
free(tp);
tp = NULL;
}
#ifdef XACT_DEBUG
fprintf(stderr, "## cancelled transaction %p\n", otp);
#endif
}
int
libxfs_trans_iget(
xfs_mount_t *mp,
xfs_trans_t *tp,
xfs_ino_t ino,
uint flags,
uint lock_flags,
xfs_inode_t **ipp)
{
int error;
xfs_inode_t *ip;
xfs_inode_log_item_t *iip;
if (tp == NULL)
return libxfs_iget(mp, tp, ino, lock_flags, ipp);
error = libxfs_iget(mp, tp, ino, lock_flags, &ip);
if (error)
return error;
ASSERT(ip != NULL);
if (ip->i_itemp == NULL)
xfs_inode_item_init(ip, mp);
iip = ip->i_itemp;
xfs_trans_add_item(tp, (xfs_log_item_t *)(iip));
/* initialize i_transp so we can find it incore */
ip->i_transp = tp;
*ipp = ip;
return 0;
}
void
libxfs_trans_ijoin(
xfs_trans_t *tp,
xfs_inode_t *ip,
uint lock_flags)
{
xfs_inode_log_item_t *iip;
ASSERT(ip->i_transp == NULL);
if (ip->i_itemp == NULL)
xfs_inode_item_init(ip, ip->i_mount);
iip = ip->i_itemp;
ASSERT(iip->ili_flags == 0);
ASSERT(iip->ili_inode != NULL);
xfs_trans_add_item(tp, (xfs_log_item_t *)(iip));
ip->i_transp = tp;
#ifdef XACT_DEBUG
fprintf(stderr, "ijoin'd inode %llu, transaction %p\n", ip->i_ino, tp);
#endif
}
void
libxfs_trans_ijoin_ref(
xfs_trans_t *tp,
xfs_inode_t *ip,
int lock_flags)
{
ASSERT(ip->i_transp == tp);
ASSERT(ip->i_itemp != NULL);
xfs_trans_ijoin(tp, ip, lock_flags);
#ifdef XACT_DEBUG
fprintf(stderr, "ijoin_ref'd inode %llu, transaction %p\n", ip->i_ino, tp);
#endif
}
void
libxfs_trans_inode_alloc_buf(
xfs_trans_t *tp,
xfs_buf_t *bp)
{
xfs_buf_log_item_t *bip;
ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
bip->bli_flags |= XFS_BLI_INODE_ALLOC_BUF;
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DINO_BUF);
}
/*
* This is called to mark the fields indicated in fieldmask as needing
* to be logged when the transaction is committed. The inode must
* already be associated with the given transaction.
*
* The values for fieldmask are defined in xfs_log_format.h. We always
* log all of the core inode if any of it has changed, and we always log
* all of the inline data/extents/b-tree root if any of them has changed.
*/
void
xfs_trans_log_inode(
xfs_trans_t *tp,
xfs_inode_t *ip,
uint flags)
{
ASSERT(ip->i_transp == tp);
ASSERT(ip->i_itemp != NULL);
#ifdef XACT_DEBUG
fprintf(stderr, "dirtied inode %llu, transaction %p\n", ip->i_ino, tp);
#endif
tp->t_flags |= XFS_TRANS_DIRTY;
ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
/*
* Always OR in the bits from the ili_last_fields field.
* This is to coordinate with the xfs_iflush() and xfs_iflush_done()
* routines in the eventual clearing of the ilf_fields bits.
* See the big comment in xfs_iflush() for an explanation of
* this coordination mechanism.
*/
flags |= ip->i_itemp->ili_last_fields;
ip->i_itemp->ili_fields |= flags;
}
/*
* This is called to mark bytes first through last inclusive of the given
* buffer as needing to be logged when the transaction is committed.
* The buffer must already be associated with the given transaction.
*
* First and last are numbers relative to the beginning of this buffer,
* so the first byte in the buffer is numbered 0 regardless of the
* value of b_blkno.
*/
void
libxfs_trans_log_buf(
xfs_trans_t *tp,
xfs_buf_t *bp,
uint first,
uint last)
{
xfs_buf_log_item_t *bip;
ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
ASSERT((first <= last) && (last < XFS_BUF_COUNT(bp)));
#ifdef XACT_DEBUG
fprintf(stderr, "dirtied buffer %p, transaction %p\n", bp, tp);
#endif
bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
tp->t_flags |= XFS_TRANS_DIRTY;
bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
xfs_buf_item_log(bip, first, last);
}
void
libxfs_trans_brelse(
xfs_trans_t *tp,
xfs_buf_t *bp)
{
xfs_buf_log_item_t *bip;
#ifdef XACT_DEBUG
fprintf(stderr, "released buffer %p, transaction %p\n", bp, tp);
#endif
if (tp == NULL) {
ASSERT(XFS_BUF_FSPRIVATE2(bp, void *) == NULL);
libxfs_putbuf(bp);
return;
}
ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
ASSERT(bip->bli_item.li_type == XFS_LI_BUF);
if (bip->bli_recur > 0) {
bip->bli_recur--;
return;
}
/* If dirty/stale, can't release till transaction committed */
if (bip->bli_flags & XFS_BLI_STALE)
return;
if (bip->bli_item.li_desc->lid_flags & XFS_LID_DIRTY)
return;
xfs_trans_del_item(&bip->bli_item);
if (bip->bli_flags & XFS_BLI_HOLD)
bip->bli_flags &= ~XFS_BLI_HOLD;
XFS_BUF_SET_FSPRIVATE2(bp, NULL);
libxfs_putbuf(bp);
}
void
libxfs_trans_binval(
xfs_trans_t *tp,
xfs_buf_t *bp)
{
xfs_buf_log_item_t *bip;
#ifdef XACT_DEBUG
fprintf(stderr, "binval'd buffer %p, transaction %p\n", bp, tp);
#endif
ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
if (bip->bli_flags & XFS_BLI_STALE)
return;
XFS_BUF_UNDELAYWRITE(bp);
xfs_buf_stale(bp);
bip->bli_flags |= XFS_BLI_STALE;
bip->bli_flags &= ~XFS_BLI_DIRTY;
bip->bli_format.blf_flags &= ~XFS_BLF_INODE_BUF;
bip->bli_format.blf_flags |= XFS_BLF_CANCEL;
bip->bli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
tp->t_flags |= XFS_TRANS_DIRTY;
}
void
libxfs_trans_bjoin(
xfs_trans_t *tp,
xfs_buf_t *bp)
{
xfs_buf_log_item_t *bip;
ASSERT(XFS_BUF_FSPRIVATE2(bp, void *) == NULL);
#ifdef XACT_DEBUG
fprintf(stderr, "bjoin'd buffer %p, transaction %p\n", bp, tp);
#endif
xfs_buf_item_init(bp, tp->t_mountp);
bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
xfs_trans_add_item(tp, (xfs_log_item_t *)bip);
XFS_BUF_SET_FSPRIVATE2(bp, tp);
}
void
libxfs_trans_bhold(
xfs_trans_t *tp,
xfs_buf_t *bp)
{
xfs_buf_log_item_t *bip;
ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
#ifdef XACT_DEBUG
fprintf(stderr, "bhold'd buffer %p, transaction %p\n", bp, tp);
#endif
bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
bip->bli_flags |= XFS_BLI_HOLD;
}
xfs_buf_t *
libxfs_trans_get_buf_map(
xfs_trans_t *tp,
struct xfs_buftarg *btp,
struct xfs_buf_map *map,
int nmaps,
uint f)
{
xfs_buf_t *bp;
xfs_buf_log_item_t *bip;
if (tp == NULL)
return libxfs_getbuf_map(btp, map, nmaps, 0);
bp = xfs_trans_buf_item_match(tp, btp, map, nmaps);
if (bp != NULL) {
ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
ASSERT(bip != NULL);
bip->bli_recur++;
return bp;
}
bp = libxfs_getbuf_map(btp, map, nmaps, 0);
if (bp == NULL)
return NULL;
#ifdef XACT_DEBUG
fprintf(stderr, "trans_get_buf buffer %p, transaction %p\n", bp, tp);
#endif
xfs_buf_item_init(bp, tp->t_mountp);
bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t*);
bip->bli_recur = 0;
xfs_trans_add_item(tp, (xfs_log_item_t *)bip);
/* initialize b_fsprivate2 so we can find it incore */
XFS_BUF_SET_FSPRIVATE2(bp, tp);
return bp;
}
xfs_buf_t *
libxfs_trans_getsb(
xfs_trans_t *tp,
xfs_mount_t *mp,
int flags)
{
xfs_buf_t *bp;
xfs_buf_log_item_t *bip;
int len = XFS_FSS_TO_BB(mp, 1);
DEFINE_SINGLE_BUF_MAP(map, XFS_SB_DADDR, len);
if (tp == NULL)
return libxfs_getsb(mp, flags);
bp = xfs_trans_buf_item_match(tp, mp->m_dev, &map, 1);
if (bp != NULL) {
ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
ASSERT(bip != NULL);
bip->bli_recur++;
return bp;
}
bp = libxfs_getsb(mp, flags);
#ifdef XACT_DEBUG
fprintf(stderr, "trans_get_sb buffer %p, transaction %p\n", bp, tp);
#endif
xfs_buf_item_init(bp, mp);
bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t*);
bip->bli_recur = 0;
xfs_trans_add_item(tp, (xfs_log_item_t *)bip);
/* initialize b_fsprivate2 so we can find it incore */
XFS_BUF_SET_FSPRIVATE2(bp, tp);
return bp;
}
int
libxfs_trans_read_buf_map(
xfs_mount_t *mp,
xfs_trans_t *tp,
struct xfs_buftarg *btp,
struct xfs_buf_map *map,
int nmaps,
uint flags,
xfs_buf_t **bpp,
const struct xfs_buf_ops *ops)
{
xfs_buf_t *bp;
xfs_buf_log_item_t *bip;
int error;
*bpp = NULL;
if (tp == NULL) {
bp = libxfs_readbuf_map(btp, map, nmaps, flags, ops);
if (!bp) {
return (flags & XBF_TRYLOCK) ? -EAGAIN : -ENOMEM;
}
if (bp->b_error)
goto out_relse;
goto done;
}
bp = xfs_trans_buf_item_match(tp, btp, map, nmaps);
if (bp != NULL) {
ASSERT(XFS_BUF_FSPRIVATE2(bp, xfs_trans_t *) == tp);
ASSERT(XFS_BUF_FSPRIVATE(bp, void *) != NULL);
bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t*);
bip->bli_recur++;
goto done;
}
bp = libxfs_readbuf_map(btp, map, nmaps, flags, ops);
if (!bp) {
return (flags & XBF_TRYLOCK) ? -EAGAIN : -ENOMEM;
}
if (bp->b_error)
goto out_relse;
#ifdef XACT_DEBUG
fprintf(stderr, "trans_read_buf buffer %p, transaction %p\n", bp, tp);
#endif
xfs_buf_item_init(bp, tp->t_mountp);
bip = XFS_BUF_FSPRIVATE(bp, xfs_buf_log_item_t *);
bip->bli_recur = 0;
xfs_trans_add_item(tp, (xfs_log_item_t *)bip);
/* initialise b_fsprivate2 so we can find it incore */
XFS_BUF_SET_FSPRIVATE2(bp, tp);
done:
*bpp = bp;
return 0;
out_relse:
error = bp->b_error;
xfs_buf_relse(bp);
return error;
}
/*
* Record the indicated change to the given field for application
* to the file system's superblock when the transaction commits.
* For now, just store the change in the transaction structure.
* Mark the transaction structure to indicate that the superblock
* needs to be updated before committing.
*
* Originally derived from xfs_trans_mod_sb().
*/
void
libxfs_trans_mod_sb(
xfs_trans_t *tp,
uint field,
long delta)
{
switch (field) {
case XFS_TRANS_SB_RES_FDBLOCKS:
return;
case XFS_TRANS_SB_FDBLOCKS:
tp->t_fdblocks_delta += delta;
break;
case XFS_TRANS_SB_ICOUNT:
ASSERT(delta > 0);
tp->t_icount_delta += delta;
break;
case XFS_TRANS_SB_IFREE:
tp->t_ifree_delta += delta;
break;
case XFS_TRANS_SB_FREXTENTS:
tp->t_frextents_delta += delta;
break;
default:
ASSERT(0);
return;
}
tp->t_flags |= (XFS_TRANS_SB_DIRTY | XFS_TRANS_DIRTY);
}
/*
* Transaction commital code follows (i.e. write to disk in libxfs)
*/
static void
inode_item_done(
xfs_inode_log_item_t *iip)
{
xfs_dinode_t *dip;
xfs_inode_t *ip;
xfs_mount_t *mp;
xfs_buf_t *bp;
int error;
ip = iip->ili_inode;
mp = iip->ili_item.li_mountp;
ASSERT(ip != NULL);
if (!(iip->ili_fields & XFS_ILOG_ALL)) {
ip->i_transp = NULL; /* disassociate from transaction */
iip->ili_flags = 0; /* reset all flags */
return;
}
/*
* Get the buffer containing the on-disk inode.
*/
error = xfs_imap_to_bp(mp, NULL, &ip->i_imap, &dip, &bp, 0, 0);
if (error) {
fprintf(stderr, _("%s: warning - imap_to_bp failed (%d)\n"),
progname, error);
return;
}
XFS_BUF_SET_FSPRIVATE(bp, iip);
error = libxfs_iflush_int(ip, bp);
if (error) {
fprintf(stderr, _("%s: warning - iflush_int failed (%d)\n"),
progname, error);
return;
}
ip->i_transp = NULL; /* disassociate from transaction */
XFS_BUF_SET_FSPRIVATE(bp, NULL); /* remove log item */
XFS_BUF_SET_FSPRIVATE2(bp, NULL); /* remove xact ptr */
libxfs_writebuf(bp, 0);
#ifdef XACT_DEBUG
fprintf(stderr, "flushing dirty inode %llu, buffer %p\n",
ip->i_ino, bp);
#endif
}
static void
buf_item_done(
xfs_buf_log_item_t *bip)
{
xfs_buf_t *bp;
int hold;
extern kmem_zone_t *xfs_buf_item_zone;
bp = bip->bli_buf;
ASSERT(bp != NULL);
XFS_BUF_SET_FSPRIVATE(bp, NULL); /* remove log item */
XFS_BUF_SET_FSPRIVATE2(bp, NULL); /* remove xact ptr */
hold = (bip->bli_flags & XFS_BLI_HOLD);
if (bip->bli_flags & XFS_BLI_DIRTY) {
#ifdef XACT_DEBUG
fprintf(stderr, "flushing/staling buffer %p (hold=%d)\n",
bp, hold);
#endif
libxfs_writebuf_int(bp, 0);
}
if (hold)
bip->bli_flags &= ~XFS_BLI_HOLD;
else
libxfs_putbuf(bp);
/* release the buf item */
kmem_zone_free(xfs_buf_item_zone, bip);
}
static void
trans_committed(
xfs_trans_t *tp)
{
struct xfs_log_item_desc *lidp, *next;
list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) {
struct xfs_log_item *lip = lidp->lid_item;
xfs_trans_del_item(lip);
if (lip->li_type == XFS_LI_BUF)
buf_item_done((xfs_buf_log_item_t *)lip);
else if (lip->li_type == XFS_LI_INODE)
inode_item_done((xfs_inode_log_item_t *)lip);
else {
fprintf(stderr, _("%s: unrecognised log item type\n"),
progname);
ASSERT(0);
}
}
}
static void
buf_item_unlock(
xfs_buf_log_item_t *bip)
{
xfs_buf_t *bp = bip->bli_buf;
uint hold;
/* Clear the buffer's association with this transaction. */
XFS_BUF_SET_FSPRIVATE2(bip->bli_buf, NULL);
hold = bip->bli_flags & XFS_BLI_HOLD;
bip->bli_flags &= ~XFS_BLI_HOLD;
if (!hold)
libxfs_putbuf(bp);
}
static void
inode_item_unlock(
xfs_inode_log_item_t *iip)
{
xfs_inode_t *ip = iip->ili_inode;
/* Clear the transaction pointer in the inode. */
ip->i_transp = NULL;
iip->ili_flags = 0;
}
/*
* Unlock all of the items of a transaction and free all the descriptors
* of that transaction.
*/
static void
xfs_trans_free_items(
struct xfs_trans *tp)
{
struct xfs_log_item_desc *lidp, *next;
list_for_each_entry_safe(lidp, next, &tp->t_items, lid_trans) {
struct xfs_log_item *lip = lidp->lid_item;
xfs_trans_del_item(lip);
if (lip->li_type == XFS_LI_BUF)
buf_item_unlock((xfs_buf_log_item_t *)lip);
else if (lip->li_type == XFS_LI_INODE)
inode_item_unlock((xfs_inode_log_item_t *)lip);
else {
fprintf(stderr, _("%s: unrecognised log item type\n"),
progname);
ASSERT(0);
}
}
}
/*
* Commit the changes represented by this transaction
*/
int
libxfs_trans_commit(
xfs_trans_t *tp)
{
xfs_sb_t *sbp;
if (tp == NULL)
return 0;
if (!(tp->t_flags & XFS_TRANS_DIRTY)) {
#ifdef XACT_DEBUG
fprintf(stderr, "committed clean transaction %p\n", tp);
#endif
xfs_trans_free_items(tp);
free(tp);
tp = NULL;
return 0;
}
if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
sbp = &(tp->t_mountp->m_sb);
if (tp->t_icount_delta)
sbp->sb_icount += tp->t_icount_delta;
if (tp->t_ifree_delta)
sbp->sb_ifree += tp->t_ifree_delta;
if (tp->t_fdblocks_delta)
sbp->sb_fdblocks += tp->t_fdblocks_delta;
if (tp->t_frextents_delta)
sbp->sb_frextents += tp->t_frextents_delta;
xfs_log_sb(tp);
}
#ifdef XACT_DEBUG
fprintf(stderr, "committing dirty transaction %p\n", tp);
#endif
trans_committed(tp);
/* That's it for the transaction structure. Free it. */
free(tp);
tp = NULL;
return 0;
}