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xfs: simplify inode to transaction joining

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Currently we need to either call IHOLD or xfs_trans_ihold on an inode when
joining it to a transaction via xfs_trans_ijoin.

This patches instead makes xfs_trans_ijoin usable on it's own by doing
an implicity xfs_trans_ihold, which also allows us to drop the third
argument.  For the case where we want to hold a reference on the inode
a xfs_trans_ijoin_ref wrapper is added which does the IHOLD and marks
the inode for needing an xfs_iput.  In addition to the cleaner interface
to the caller this also simplifies the implementation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Christoph Hellwig 2010-06-24 11:36:58 +10:00 • committed by Alex Elder
parent 4d16e9246f
commit 898621d5a7
19 changed files with 103 additions and 247 deletions
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26
fs/xfs/xfs_rename.c
View file

@ -169,26 +169,14 @@ xfs_rename(
/*
* Join all the inodes to the transaction. From this point on,
* we can rely on either trans_commit or trans_cancel to unlock
* them. Note that we need to add a vnode reference to the
* directories since trans_commit & trans_cancel will decrement
* them when they unlock the inodes. Also, we need to be careful
* not to add an inode to the transaction more than once.
* them.
*/
IHOLD(src_dp);
xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL);
if (new_parent) {
IHOLD(target_dp);
xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL);
}
IHOLD(src_ip);
xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL);
if (target_ip) {
IHOLD(target_ip);
xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL);
}
xfs_trans_ijoin_ref(tp, src_dp, XFS_ILOCK_EXCL);
if (new_parent)
xfs_trans_ijoin_ref(tp, target_dp, XFS_ILOCK_EXCL);
xfs_trans_ijoin_ref(tp, src_ip, XFS_ILOCK_EXCL);
if (target_ip)
xfs_trans_ijoin_ref(tp, target_ip, XFS_ILOCK_EXCL);
/*
* If we are using project inheritance, we only allow renames