Return enhanced basic attributes from the AFS filesystem. This includes the
following:
(1) The data version number as st_data_version.
(2) STATX_INFO_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_INFO_AUTODIR 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_INFO_FABRICATED as they do not
actually exist in the mounted AFS directory.
(4) Files, directories and symlinks accessed over AFS are marked
STATX_INFO_REMOTE. Local fake directories are marked
STATX_INFO_FABRICATED.
(5) STATX_INFO_NONSYSTEM_OWNERSHIP is set as the UID and GID retrieved from an
AFS share may not be applicable on the system.
and also some auxiliary data:
(6) The volume ID and type.
(7) The volume name.
(8) The cell name.
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
---
fs/afs/inode.c | 46 ++++++++++++++++++++++++++++++++++++++--------
1 file changed, 38 insertions(+), 8 deletions(-)
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index ce25d755b7aa..5789f68abbea 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -71,9 +71,9 @@ 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;
@@ -374,16 +374,46 @@ error_unlock:
/*
* 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;
-
- inode = dentry->d_inode;
+ struct inode *inode = dentry->d_inode;
_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->information |= STATX_INFO_AUTODIR;
+
+ if (test_bit(AFS_VNODE_PSEUDODIR, &AFS_FS_I(inode)->flags))
+ stat->information |= STATX_INFO_FABRICATED;
+ else
+ stat->information |= STATX_INFO_REMOTE;
+
+ stat->information |= STATX_INFO_NONSYSTEM_OWNERSHIP;
+
+ if (stat->auxinfo) {
+ struct afs_super_info *as = inode->i_sb->s_fs_info;
+ struct statx_auxinfo *aux = stat->auxinfo;
+
+ aux->sx_fsid = as->volume->vid;
+ /* construct a volume ID from the AFS volume ID and type */
+ aux->sx_volume_id[0] = as->volume->vid >> 24;
+ aux->sx_volume_id[1] = as->volume->vid >> 16;
+ aux->sx_volume_id[2] = as->volume->vid >> 8;
+ aux->sx_volume_id[3] = as->volume->vid >> 0;
+ aux->sx_volume_id[4] = as->volume->type;
+
+ strcpy(aux->sx_volume_name, as->volume->vlocation->vldb.name);
+ strcpy(aux->sx_domain_name, as->volume->cell->name);
+
+ aux->sx_mask = STATX_FSID | STATX_VOLUME_ID |
+ STATX_VOLUME_NAME | STATX_DOMAIN_NAME;
+ }
return 0;
}
--
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