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author | Christoph Hellwig <hch@infradead.org> | 2011-02-13 13:26:42 (GMT) |
---|---|---|
committer | Alex Elder <aelder@sgi.com> | 2011-02-23 02:32:28 (GMT) |
commit | ec3ba85f4083d10e32fe58b46db02d78ef71f6b8 (patch) | |
tree | bf8e3b41e913c80f24673b87fb390ce6903d82ac /fs/xfs/xfs_vnodeops.c | |
parent | 1050c71e2925ab0cb025e4c89e08b15529a1ee36 (diff) | |
download | linux-ec3ba85f4083d10e32fe58b46db02d78ef71f6b8.tar.xz |
xfs: more sensible inode refcounting for ialloc
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>
Diffstat (limited to 'fs/xfs/xfs_vnodeops.c')
-rw-r--r-- | fs/xfs/xfs_vnodeops.c | 61 |
1 files changed, 16 insertions, 45 deletions
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index d8e6f8c..258d4f9 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -1310,7 +1310,7 @@ xfs_create( error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid, XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); if (error) - goto std_return; + return error; if (is_dir) { rdev = 0; @@ -1390,12 +1390,6 @@ xfs_create( } /* - * At this point, we've gotten a newly allocated inode. - * It is locked (and joined to the transaction). - */ - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); - - /* * Now we join the directory inode to the transaction. We do not do it * earlier because xfs_dir_ialloc might commit the previous transaction * (and release all the locks). An error from here on will result in @@ -1440,22 +1434,13 @@ xfs_create( */ xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp); - /* - * xfs_trans_commit normally decrements the vnode ref count - * when it unlocks the inode. Since we want to return the - * vnode to the caller, we bump the vnode ref count now. - */ - IHOLD(ip); - error = xfs_bmap_finish(&tp, &free_list, &committed); if (error) - goto out_abort_rele; + goto out_bmap_cancel; error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); - if (error) { - IRELE(ip); - goto out_dqrele; - } + if (error) + goto out_release_inode; xfs_qm_dqrele(udqp); xfs_qm_dqrele(gdqp); @@ -1469,27 +1454,21 @@ xfs_create( cancel_flags |= XFS_TRANS_ABORT; out_trans_cancel: xfs_trans_cancel(tp, cancel_flags); - out_dqrele: + out_release_inode: + /* + * Wait until after the current transaction is aborted to + * release the inode. This prevents recursive transactions + * and deadlocks from xfs_inactive. + */ + if (ip) + IRELE(ip); + xfs_qm_dqrele(udqp); xfs_qm_dqrele(gdqp); if (unlock_dp_on_error) xfs_iunlock(dp, XFS_ILOCK_EXCL); - std_return: return error; - - out_abort_rele: - /* - * Wait until after the current transaction is aborted to - * release the inode. This prevents recursive transactions - * and deadlocks from xfs_inactive. - */ - xfs_bmap_cancel(&free_list); - cancel_flags |= XFS_TRANS_ABORT; - xfs_trans_cancel(tp, cancel_flags); - IRELE(ip); - unlock_dp_on_error = B_FALSE; - goto out_dqrele; } #ifdef DEBUG @@ -2114,9 +2093,8 @@ xfs_symlink( XFS_BMAPI_WRITE | XFS_BMAPI_METADATA, &first_block, resblks, mval, &nmaps, &free_list); - if (error) { - goto error1; - } + if (error) + goto error2; if (resblks) resblks -= fs_blocks; @@ -2148,7 +2126,7 @@ xfs_symlink( error = xfs_dir_createname(tp, dp, link_name, ip->i_ino, &first_block, &free_list, resblks); if (error) - goto error1; + goto error2; xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); @@ -2161,13 +2139,6 @@ xfs_symlink( xfs_trans_set_sync(tp); } - /* - * xfs_trans_commit normally decrements the vnode ref count - * when it unlocks the inode. Since we want to return the - * vnode to the caller, we bump the vnode ref count now. - */ - IHOLD(ip); - error = xfs_bmap_finish(&tp, &free_list, &committed); if (error) { goto error2; |