From: Yonghong Song <y...@fb.com>
Return enhanced file attributes from the btrfs, including:
(1). inode creation time as stx_btime, and
(2). Certain BTRFS_INODE_xxx flags are mapped to stx_attributes flags.
Example output:
[root@localhost ~]# cat t.sh
touch t
chattr +aic t
~/linux/samples/statx/test-statx t
chattr -aic t
touch t
echo "========================================"
~/linux/samples/statx/test-statx t
/bin/rm t
[root@localhost ~]# ./t.sh
statx(t) = 0
results=fff
Size: 0 Blocks: 0 IO Block: 4096 regular
file
Device: 00:1c Inode: 63962 Links: 1
Access: (0644/-rw-r--r--) Uid: 0 Gid: 0
Access: 2017-05-11 16:03:13.999856591-0700
Modify: 2017-05-11 16:03:13.999856591-0700
Change: 2017-05-11 16:03:14.000856663-0700
Birth: 2017-05-11 16:03:13.999856591-0700
Attributes: 0000000000000034 (........ ........ ........ ........
........ ........ ........ .-ai.c..)
========================================
statx(t) = 0
results=fff
Size: 0 Blocks: 0 IO Block: 4096 regular
file
Device: 00:1c Inode: 63962 Links: 1
Access: (0644/-rw-r--r--) Uid: 0 Gid: 0
Access: 2017-05-11 16:03:14.006857097-0700
Modify: 2017-05-11 16:03:14.006857097-0700
Change: 2017-05-11 16:03:14.006857097-0700
Birth: 2017-05-11 16:03:13.999856591-0700
Attributes: 0000000000000000 (........ ........ ........ ........
........ ........ ........ .---.-..)
[root@localhost ~]#
Reviewed-by: Omar Sandoval <osan...@fb.com>
Signed-off-by: Yonghong Song <y...@fb.com>
---
fs/btrfs/inode.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 17cbe9306faf..5143e4712f93 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -9564,6 +9564,24 @@ static int btrfs_getattr(const struct path *path, struct
kstat *stat,
u64 delalloc_bytes;
struct inode *inode = d_inode(path->dentry);
u32 blocksize = inode->i_sb->s_blocksize;
+ u32 bi_flags = BTRFS_I(inode)->flags;
+
+ stat->result_mask |= STATX_BTIME;
+ stat->btime.tv_sec = BTRFS_I(inode)->i_otime.tv_sec;
+ stat->btime.tv_nsec = BTRFS_I(inode)->i_otime.tv_nsec;
+ if (bi_flags & BTRFS_INODE_APPEND)
+ stat->attributes |= STATX_ATTR_APPEND;
+ if (bi_flags & BTRFS_INODE_COMPRESS)
+ stat->attributes |= STATX_ATTR_COMPRESSED;
+ if (bi_flags & BTRFS_INODE_IMMUTABLE)
+ stat->attributes |= STATX_ATTR_IMMUTABLE;
+ if (bi_flags & BTRFS_INODE_NODUMP)
+ stat->attributes |= STATX_ATTR_NODUMP;
+
+ stat->attributes_mask |= (STATX_ATTR_APPEND |
+ STATX_ATTR_COMPRESSED |
+ STATX_ATTR_IMMUTABLE |
+ STATX_ATTR_NODUMP);
generic_fillattr(inode, stat);
stat->dev = BTRFS_I(inode)->root->anon_dev;
--
2.13.0
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