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authorBrian Foster <bfoster@redhat.com>2013-09-20 19:06:09 +0400
committerBen Myers <bpm@sgi.com>2013-10-08 23:53:02 +0400
commit36b21dde6e899d2f25077b7c239d2d6bcff17d73 (patch)
tree34470b5c788b4db47002d891aa7f8d065aabd3df /fs/xfs/xfs_symlink.c
parent2900a579abcea13e4e77c40f89eb16eeecb5508e (diff)
downloadlinux-36b21dde6e899d2f25077b7c239d2d6bcff17d73.tar.xz
xfs: push down inactive transaction mgmt for remote symlinks
Push down the transaction management for remote symlinks from xfs_inactive() down to xfs_inactive_symlink_rmt(). The latter is cleaned up to avoid transaction management intended for the calling context (i.e., trans duplication, reservation, item attachment). Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_symlink.c')
-rw-r--r--fs/xfs/xfs_symlink.c86
1 files changed, 40 insertions, 46 deletions
diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
index f622a97a7e33..ded282b10bc2 100644
--- a/fs/xfs/xfs_symlink.c
+++ b/fs/xfs/xfs_symlink.c
@@ -424,8 +424,7 @@ xfs_symlink(
*/
STATIC int
xfs_inactive_symlink_rmt(
- xfs_inode_t *ip,
- xfs_trans_t **tpp)
+ struct xfs_inode *ip)
{
xfs_buf_t *bp;
int committed;
@@ -437,11 +436,9 @@ xfs_inactive_symlink_rmt(
xfs_mount_t *mp;
xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS];
int nmaps;
- xfs_trans_t *ntp;
int size;
xfs_trans_t *tp;
- tp = *tpp;
mp = ip->i_mount;
ASSERT(ip->i_df.if_flags & XFS_IFEXTENTS);
/*
@@ -453,6 +450,16 @@ xfs_inactive_symlink_rmt(
*/
ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2);
+ tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
+ error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0);
+ if (error) {
+ xfs_trans_cancel(tp, 0);
+ return error;
+ }
+
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, ip, 0);
+
/*
* Lock the inode, fix the size, and join it to the transaction.
* Hold it so in the normal path, we still have it locked for
@@ -471,7 +478,7 @@ xfs_inactive_symlink_rmt(
error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size),
mval, &nmaps, 0);
if (error)
- goto error0;
+ goto error_trans_cancel;
/*
* Invalidate the block(s). No validation is done.
*/
@@ -481,22 +488,24 @@ xfs_inactive_symlink_rmt(
XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0);
if (!bp) {
error = ENOMEM;
- goto error1;
+ goto error_bmap_cancel;
}
xfs_trans_binval(tp, bp);
}
/*
* Unmap the dead block(s) to the free_list.
*/
- if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps,
- &first_block, &free_list, &done)))
- goto error1;
+ error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps,
+ &first_block, &free_list, &done);
+ if (error)
+ goto error_bmap_cancel;
ASSERT(done);
/*
* Commit the first transaction. This logs the EFI and the inode.
*/
- if ((error = xfs_bmap_finish(&tp, &free_list, &committed)))
- goto error1;
+ error = xfs_bmap_finish(&tp, &free_list, &committed);
+ if (error)
+ goto error_bmap_cancel;
/*
* The transaction must have been committed, since there were
* actually extents freed by xfs_bunmapi. See xfs_bmap_finish.
@@ -511,26 +520,13 @@ xfs_inactive_symlink_rmt(
xfs_trans_ijoin(tp, ip, 0);
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
/*
- * Get a new, empty transaction to return to our caller.
- */
- ntp = xfs_trans_dup(tp);
- /*
* Commit the transaction containing extent freeing and EFDs.
- * If we get an error on the commit here or on the reserve below,
- * we need to unlock the inode since the new transaction doesn't
- * have the inode attached.
*/
- error = xfs_trans_commit(tp, 0);
- tp = ntp;
+ error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
if (error) {
ASSERT(XFS_FORCED_SHUTDOWN(mp));
- goto error0;
+ goto error_unlock;
}
- /*
- * transaction commit worked ok so we can drop the extra ticket
- * reference that we gained in xfs_trans_dup()
- */
- xfs_log_ticket_put(tp->t_ticket);
/*
* Remove the memory for extent descriptions (just bookkeeping).
@@ -538,23 +534,16 @@ xfs_inactive_symlink_rmt(
if (ip->i_df.if_bytes)
xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK);
ASSERT(ip->i_df.if_bytes == 0);
- /*
- * Put an itruncate log reservation in the new transaction
- * for our caller.
- */
- error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0);
- if (error) {
- ASSERT(XFS_FORCED_SHUTDOWN(mp));
- goto error0;
- }
- xfs_trans_ijoin(tp, ip, 0);
- *tpp = tp;
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
return 0;
- error1:
+error_bmap_cancel:
xfs_bmap_cancel(&free_list);
- error0:
+error_trans_cancel:
+ xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
+error_unlock:
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
return error;
}
@@ -563,41 +552,46 @@ xfs_inactive_symlink_rmt(
*/
int
xfs_inactive_symlink(
- struct xfs_inode *ip,
- struct xfs_trans **tp)
+ struct xfs_inode *ip)
{
struct xfs_mount *mp = ip->i_mount;
int pathlen;
trace_xfs_inactive_symlink(ip);
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
-
if (XFS_FORCED_SHUTDOWN(mp))
return XFS_ERROR(EIO);
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+
/*
* Zero length symlinks _can_ exist.
*/
pathlen = (int)ip->i_d.di_size;
- if (!pathlen)
+ if (!pathlen) {
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
return 0;
+ }
if (pathlen < 0 || pathlen > MAXPATHLEN) {
xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)",
__func__, (unsigned long long)ip->i_ino, pathlen);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
ASSERT(0);
return XFS_ERROR(EFSCORRUPTED);
}
if (ip->i_df.if_flags & XFS_IFINLINE) {
- if (ip->i_df.if_bytes > 0)
+ if (ip->i_df.if_bytes > 0)
xfs_idata_realloc(ip, -(ip->i_df.if_bytes),
XFS_DATA_FORK);
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
ASSERT(ip->i_df.if_bytes == 0);
return 0;
}
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+
/* remove the remote symlink */
- return xfs_inactive_symlink_rmt(ip, tp);
+ return xfs_inactive_symlink_rmt(ip);
}