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xfs: more sensible inode refcounting for ialloc

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Currently we return iodes from xfs_ialloc with just a single reference held.
But we need two references, as one is dropped during transaction commit and
the second needs to be transfered to the VFS.  Change xfs_ialloc to use
xfs_iget plus xfs_trans_ijoin_ref to grab two references to the inode,
and remove the now superflous IHOLD calls from all callers.  This also
greatly simplifies the error handling in xfs_create and also allow to remove
xfs_trans_iget as no other callers are left.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Christoph Hellwig
2011-02-13 13:26:42 +00:00
committed by Alex Elder
parent 1050c71e29
commit ec3ba85f40
5 changed files with 20 additions and 79 deletions
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5
fs/xfs/xfs_inode.c
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@@ -1016,8 +1016,8 @@ xfs_ialloc(
* This is because we're setting fields here we need
* to prevent others from looking at until we're done.
*/
error = xfs_trans_iget(tp->t_mountp, tp, ino,
XFS_IGET_CREATE, XFS_ILOCK_EXCL, &ip);
error = xfs_iget(tp->t_mountp, tp, ino, XFS_IGET_CREATE,
XFS_ILOCK_EXCL, &ip);
if (error)
return error;
ASSERT(ip != NULL);
@@ -1166,6 +1166,7 @@ xfs_ialloc(
/*
* Log the new values stuffed into the inode.
*/
xfs_trans_ijoin_ref(tp, ip, XFS_ILOCK_EXCL);
xfs_trans_log_inode(tp, ip, flags);
/* now that we have an i_mode we can setup inode ops and unlock */