Symlinks should never have append/immutable flags.
While checking inodes, if found a symlink with append/immutable
flags, report and record the fatal error.
This is for lowmem mode.
Signed-off-by: Su Yue <suy.fnst@xxxxxxxxxxxxxx>
---
check/mode-lowmem.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/check/mode-lowmem.c b/check/mode-lowmem.c
index 9890180d1d3c..61c4e7f23d47 100644
--- a/check/mode-lowmem.c
+++ b/check/mode-lowmem.c
@@ -2274,6 +2274,7 @@ static int check_inode_item(struct btrfs_root *root, struct btrfs_path *path)
struct btrfs_key last_key;
u64 inode_id;
u32 mode;
+ u64 flags;
u64 nlink;
u64 nbytes;
u64 isize;
@@ -2307,10 +2308,19 @@ static int check_inode_item(struct btrfs_root *root, struct btrfs_path *path)
isize = btrfs_inode_size(node, ii);
nbytes = btrfs_inode_nbytes(node, ii);
mode = btrfs_inode_mode(node, ii);
+ flags = btrfs_inode_flags(node, ii);
dir = imode_to_type(mode) == BTRFS_FT_DIR;
nlink = btrfs_inode_nlink(node, ii);
nodatasum = btrfs_inode_flags(node, ii) & BTRFS_INODE_NODATASUM;
+ if (mode & BTRFS_FT_SYMLINK &&
+ (flags & (BTRFS_INODE_IMMUTABLE | BTRFS_INODE_APPEND))) {
+ err = FATAL_ERROR;
+ error(
+"symlinks shall never be with immutable/append, root %llu inode item [%llu] flags %llu may be corrupted",
+ root->objectid, inode_id, flags);
+ }
+
while (1) {
btrfs_item_key_to_cpu(path->nodes[0], &last_key, path->slots[0]);
ret = btrfs_next_item(root, path);
--
2.17.0
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