Return enhanced file attributes from the AFS filesystem. This includes the
following:
(1) The data version number as st_version, setting STATX_VERSION.
(2) STATX_ATTR_AUTOMOUNT will be set on automount directories by virtue of
S_AUTOMOUNT being set on the inode. These are referrals to other
volumes or other cells.
(3) STATX_ATTR_UNLISTED_DENTS on a directory that does cell lookup for
non-existent names and mounts them (typically mounted on /afs with -o
autocell). The resulting directories are marked STATX_ATTR_FABRICATED
as they do not actually exist in the mounted AFS directory.
(4) Files, directories and symlinks accessed over AFS are marked
STATX_ATTR_REMOTE.
STATX_ATIME, STATX_CTIME and STATX_BLOCKS are cleared as AFS does not
support them.
Example output:
[root@andromeda ~]# ./samples/statx/test-statx /afs
statx(/afs) = 0
results=7ef
Size: 2048 Blocks: 0 IO Block: 4096 directory
Device: 00:25 Inode: 1 Links: 2
Access: (0777/drwxrwxrwx) Uid: 0 Gid: 0
Access: 2006-05-07 00:21:15.000000000+0100
Modify: 2006-05-07 00:21:15.000000000+0100
Change: 2006-05-07 00:21:15.000000000+0100
IO-blocksize: blksize=4096
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
---
fs/afs/inode.c | 21 ++++++++++++++++-----
1 file changed, 16 insertions(+), 5 deletions(-)
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 86cc7264c21c..b08c405a7e1b 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -72,9 +72,9 @@ static int afs_inode_map_status(struct afs_vnode *vnode, struct key *key)
inode->i_uid = vnode->status.owner;
inode->i_gid = GLOBAL_ROOT_GID;
inode->i_size = vnode->status.size;
- inode->i_ctime.tv_sec = vnode->status.mtime_server;
- inode->i_ctime.tv_nsec = 0;
- inode->i_atime = inode->i_mtime = inode->i_ctime;
+ inode->i_mtime.tv_sec = vnode->status.mtime_server;
+ inode->i_mtime.tv_nsec = 0;
+ inode->i_atime = inode->i_ctime = inode->i_mtime;
inode->i_blocks = 0;
inode->i_generation = vnode->fid.unique;
inode->i_version = vnode->status.data_version;
@@ -375,8 +375,7 @@ int afs_validate(struct afs_vnode *vnode, struct key *key)
/*
* read the attributes of an inode
*/
-int afs_getattr(struct vfsmount *mnt, struct dentry *dentry,
- struct kstat *stat)
+int afs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
{
struct inode *inode;
@@ -385,6 +384,18 @@ int afs_getattr(struct vfsmount *mnt, struct dentry *dentry,
_enter("{ ino=%lu v=%u }", inode->i_ino, inode->i_generation);
generic_fillattr(inode, stat);
+
+ stat->result_mask &= ~(STATX_ATIME | STATX_CTIME | STATX_BLOCKS);
+ stat->result_mask |= STATX_VERSION;
+ stat->version = inode->i_version;
+
+ if (test_bit(AFS_VNODE_AUTOCELL, &AFS_FS_I(inode)->flags))
+ stat->attributes |= STATX_ATTR_UNLISTED_DENTS;
+
+ if (test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(inode)->flags))
+ stat->attributes |= STATX_ATTR_FABRICATED;
+ else
+ stat->attributes |= STATX_ATTR_REMOTE;
return 0;
}
--
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