TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ocfs2: should add inode into orphan dir after updating entry in ocfs2_rename()

Browse Source 
There are two files a and b in dir /mnt/ocfs2.

    node A                           node B

  mv a b
  In ocfs2_rename(), after calling
  ocfs2_orphan_add(), the inode of
  file b will be added into orphan
  dir.

  If ocfs2_update_entry() fails,
  ocfs2_rename return error and mv
  operation fails. But file b still
  exists in the parent dir.

  ocfs2_queue_orphan_scan
   -> ocfs2_queue_recovery_completion
   -> ocfs2_complete_recovery
   -> ocfs2_recover_orphans
  The inode of the file b will be
  put with iput().

  ocfs2_evict_inode
   -> ocfs2_delete_inode
   -> ocfs2_wipe_inode
   -> ocfs2_remove_inode
  OCFS2_VALID_FL in the inode
  i_flags will be cleared.

                                   The file b still can be accessed
                                   on node B.
                                   ls /mnt/ocfs2
                                   When first read the file b with
                                   ocfs2_read_inode_block(). It will
                                   validate the inode using
                                   ocfs2_validate_inode_block().
                                   Because OCFS2_VALID_FL not set in
                                   the inode i_flags, so the file
                                   system will be readonly.

So we should add inode into orphan dir after updating entry in
ocfs2_rename().

Signed-off-by: alex.chen <alex.chen@huawei.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
alex chen 2014-06-23 13:22:07 -07:00 committed by Linus Torvalds
parent d05f0cdcbe
commit 5fb1beb069
1 changed files with 11 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
fs/ocfs2/namei.c
View File

@ -1098,6 +1098,7 @@ static int ocfs2_rename(struct inode *old_dir,
struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
struct ocfs2_dir_lookup_result target_insert = { NULL, };
bool should_add_orphan = false;
/* At some point it might be nice to break this function up a
* bit. */
@ -1304,6 +1305,7 @@ static int ocfs2_rename(struct inode *old_dir,
mlog_errno(status);
goto bail;
}
should_add_orphan = true;
}
} else {
BUG_ON(new_dentry->d_parent->d_inode != new_dir);
@ -1348,17 +1350,6 @@ static int ocfs2_rename(struct inode *old_dir,
goto bail;
}
if (S_ISDIR(new_inode->i_mode) ||
(ocfs2_read_links_count(newfe) == 1)) {
status = ocfs2_orphan_add(osb, handle, new_inode,
newfe_bh, orphan_name,
&orphan_insert, orphan_dir);
if (status < 0) {
mlog_errno(status);
goto bail;
}
}
/* change the dirent to point to the correct inode */
status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
old_inode);
@ -1373,6 +1364,15 @@ static int ocfs2_rename(struct inode *old_dir,
else
ocfs2_add_links_count(newfe, -1);
ocfs2_journal_dirty(handle, newfe_bh);
if (should_add_orphan) {
status = ocfs2_orphan_add(osb, handle, new_inode,
newfe_bh, orphan_name,
&orphan_insert, orphan_dir);
if (status < 0) {
mlog_errno(status);
goto bail;
}
}
} else {
/* if the name was not found in new_dir, add it now */
status = ocfs2_add_entry(handle, new_dentry, old_inode,