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@xxxxxxx>
---
xfstest is coming.
fs/xfs/xfs_symlink.c | 24 +++++++++++++++++++++++-
fs/xfs/xfs_symlink.h | 1 +
fs/xfs/xfs_vnodeops.c | 15 +++------------
3 files changed, 27 insertions(+), 13 deletions(-)
Index: b/fs/xfs/xfs_symlink.c
===================================================================
--- a/fs/xfs/xfs_symlink.c
+++ b/fs/xfs/xfs_symlink.c
@@ -606,7 +606,7 @@ xfs_inactive_symlink_rmt(
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 +720,25 @@ xfs_inactive_symlink_rmt(
error0:
return error;
}
+
+/*
+ * xfs_inactive_symlink - free a symlink
+ */
+int
+xfs_inactive_symlink(
+ struct xfs_inode *ip,
+ struct xfs_trans **tp)
+{
+
+ /*
+ * Zero length symlinks _can_ exist.
+ */
+ 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;
+ } else
+ return (xfs_inactive_symlink_rmt(ip, tp));
+}
Index: b/fs/xfs/xfs_symlink.h
===================================================================
--- a/fs/xfs/xfs_symlink.h
+++ b/fs/xfs/xfs_symlink.h
@@ -61,6 +61,7 @@ int xfs_symlink(struct xfs_inode *dp, st
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 */
Index: b/fs/xfs/xfs_vnodeops.c
===================================================================
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -322,18 +322,9 @@ xfs_inactive(
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);
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