xfs: fix the symbolic link assert in xfs_ifree
Adding an extended attribute to a symbolic link can force that
link to an remote extent. xfs_inactive() incorrectly assumes
that any symbolic link small enough to be in the inode core
is incore, resulting in the remote extent to not be removed.
xfs_ifree() will assert on presence of this leaked remote extent.
Signed-off-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
index 195a403..738c04b 100644
--- a/fs/xfs/xfs_symlink.c
+++ b/fs/xfs/xfs_symlink.c
@@ -585,7 +585,7 @@
/*
* Free a symlink that has blocks associated with it.
*/
-int
+STATIC int
xfs_inactive_symlink_rmt(
xfs_inode_t *ip,
xfs_trans_t **tpp)
@@ -606,7 +606,7 @@
tp = *tpp;
mp = ip->i_mount;
- ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip));
+ ASSERT(ip->i_df.if_flags & XFS_IFEXTENTS);
/*
* We're freeing a symlink that has some
* blocks allocated to it. Free the
@@ -720,3 +720,47 @@
error0:
return error;
}
+
+/*
+ * xfs_inactive_symlink - free a symlink
+ */
+int
+xfs_inactive_symlink(
+ struct xfs_inode *ip,
+ struct xfs_trans **tp)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ int pathlen;
+
+ trace_xfs_inactive_symlink(ip);
+
+ ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
+
+ if (XFS_FORCED_SHUTDOWN(mp))
+ return XFS_ERROR(EIO);
+
+ /*
+ * Zero length symlinks _can_ exist.
+ */
+ pathlen = (int)ip->i_d.di_size;
+ if (!pathlen)
+ return 0;
+
+ if (pathlen < 0 || pathlen > MAXPATHLEN) {
+ xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)",
+ __func__, (unsigned long long)ip->i_ino, pathlen);
+ ASSERT(0);
+ return XFS_ERROR(EFSCORRUPTED);
+ }
+
+ if (ip->i_df.if_flags & XFS_IFINLINE) {
+ if (ip->i_df.if_bytes > 0)
+ xfs_idata_realloc(ip, -(ip->i_df.if_bytes),
+ XFS_DATA_FORK);
+ ASSERT(ip->i_df.if_bytes == 0);
+ return 0;
+ }
+
+ /* remove the remote symlink */
+ return xfs_inactive_symlink_rmt(ip, tp);
+}
diff --git a/fs/xfs/xfs_symlink.h b/fs/xfs/xfs_symlink.h
index b39398d..3743948 100644
--- a/fs/xfs/xfs_symlink.h
+++ b/fs/xfs/xfs_symlink.h
@@ -60,7 +60,7 @@
int xfs_symlink(struct xfs_inode *dp, struct xfs_name *link_name,
const char *target_path, umode_t mode, struct xfs_inode **ipp);
int xfs_readlink(struct xfs_inode *ip, char *link);
-int xfs_inactive_symlink_rmt(struct xfs_inode *ip, struct xfs_trans **tpp);
+int xfs_inactive_symlink(struct xfs_inode *ip, struct xfs_trans **tpp);
#endif /* __KERNEL__ */
#endif /* __XFS_SYMLINK_H */
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index aa4db33..e318672 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -571,6 +571,7 @@
DEFINE_INODE_EVENT(xfs_getattr);
DEFINE_INODE_EVENT(xfs_setattr);
DEFINE_INODE_EVENT(xfs_readlink);
+DEFINE_INODE_EVENT(xfs_inactive_symlink);
DEFINE_INODE_EVENT(xfs_alloc_file_space);
DEFINE_INODE_EVENT(xfs_free_file_space);
DEFINE_INODE_EVENT(xfs_readdir);
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 0176bb2..42c0ef2 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -322,18 +322,9 @@
xfs_trans_ijoin(tp, ip, 0);
if (S_ISLNK(ip->i_d.di_mode)) {
- /*
- * Zero length symlinks _can_ exist.
- */
- if (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) {
- error = xfs_inactive_symlink_rmt(ip, &tp);
- if (error)
- goto out_cancel;
- } else if (ip->i_df.if_bytes > 0) {
- xfs_idata_realloc(ip, -(ip->i_df.if_bytes),
- XFS_DATA_FORK);
- ASSERT(ip->i_df.if_bytes == 0);
- }
+ error = xfs_inactive_symlink(ip, &tp);
+ if (error)
+ goto out_cancel;
} else if (truncate) {
ip->i_d.di_size = 0;
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);