diff options
author | Mark Fasheh <mark.fasheh@oracle.com> | 2006-09-30 23:29:05 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-01 00:39:30 -0700 |
commit | 17ff785691503f63ec648df82a7fdaece7695561 (patch) | |
tree | 9777f4787253941c723aac1e13ab37fb285bcc4a /fs/ocfs2/namei.c | |
parent | d8c76e6f45c111c32a4b3e50a2adc9210737b0d8 (diff) | |
download | linux-3.10-17ff785691503f63ec648df82a7fdaece7695561.tar.gz linux-3.10-17ff785691503f63ec648df82a7fdaece7695561.tar.bz2 linux-3.10-17ff785691503f63ec648df82a7fdaece7695561.zip |
[PATCH] r/o bind mounts: clean up OCFS2 nlink handling
OCFS2 does some operations on i_nlink, then reverts them if some of its
operations fail to complete. This does not fit in well with the
drop_nlink() logic where we expect i_nlink to stay at zero once it gets
there.
So, delay all of the nlink operations until we're sure that the operations
have completed. Also, introduce a small helper to check whether an inode
has proper "unlinkable" i_nlink counts no matter whether it is a directory
or regular inode.
This patch is broken out from the others because it does contain some
logical changes.
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/ocfs2/namei.c')
-rw-r--r-- | fs/ocfs2/namei.c | 39 |
1 files changed, 19 insertions, 20 deletions
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c index 8c370a39e0c..259155f0eb2 100644 --- a/fs/ocfs2/namei.c +++ b/fs/ocfs2/namei.c @@ -795,11 +795,23 @@ static int ocfs2_remote_dentry_delete(struct dentry *dentry) return ret; } +static inline int inode_is_unlinkable(struct inode *inode) +{ + if (S_ISDIR(inode->i_mode)) { + if (inode->i_nlink == 2) + return 1; + return 0; + } + + if (inode->i_nlink == 1) + return 1; + return 0; +} + static int ocfs2_unlink(struct inode *dir, struct dentry *dentry) { int status; - unsigned int saved_nlink = 0; struct inode *inode = dentry->d_inode; struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); u64 blkno; @@ -874,16 +886,6 @@ static int ocfs2_unlink(struct inode *dir, } } - /* There are still a few steps left until we can consider the - * unlink to have succeeded. Save off nlink here before - * modification so we can set it back in case we hit an issue - * before commit. */ - saved_nlink = inode->i_nlink; - if (S_ISDIR(inode->i_mode)) - inode->i_nlink = 0; - else - inode->i_nlink--; - status = ocfs2_remote_dentry_delete(dentry); if (status < 0) { /* This vote should succeed under all normal @@ -892,7 +894,7 @@ static int ocfs2_unlink(struct inode *dir, goto leave; } - if (!inode->i_nlink) { + if (inode_is_unlinkable(inode)) { status = ocfs2_prepare_orphan_dir(osb, handle, inode, orphan_name, &orphan_entry_bh); @@ -919,7 +921,7 @@ static int ocfs2_unlink(struct inode *dir, fe = (struct ocfs2_dinode *) fe_bh->b_data; - if (!inode->i_nlink) { + if (inode_is_unlinkable(inode)) { status = ocfs2_orphan_add(osb, handle, inode, fe, orphan_name, orphan_entry_bh); if (status < 0) { @@ -935,10 +937,10 @@ static int ocfs2_unlink(struct inode *dir, goto leave; } - /* We can set nlink on the dinode now. clear the saved version - * so that it doesn't get set later. */ + if (S_ISDIR(inode->i_mode)) + drop_nlink(inode); + drop_nlink(inode); fe->i_links_count = cpu_to_le16(inode->i_nlink); - saved_nlink = 0; status = ocfs2_journal_dirty(handle, fe_bh); if (status < 0) { @@ -947,7 +949,7 @@ static int ocfs2_unlink(struct inode *dir, } if (S_ISDIR(inode->i_mode)) { - dir->i_nlink--; + drop_nlink(dir); status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh); if (status < 0) { @@ -957,9 +959,6 @@ static int ocfs2_unlink(struct inode *dir, } leave: - if (status < 0 && saved_nlink) - inode->i_nlink = saved_nlink; - if (handle) ocfs2_commit_trans(handle); |