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SubjectRe: [PATCH 4/4] statx: AFS: Return enhanced file attributes [ver #3]
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On Nov 22, 2016, at 5:56 PM, David Howells <dhowells@redhat.com> wrote:
>
> Return enhanced file attributes from the AFS filesystem. This includes the
> following:
>
> (1) 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.
>
> 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

This decodes to everything except STATX_GID being set:
STATX_TYPE 0x00000001U
STATX_MODE 0x00000002U
STATX_NLINK 0x00000004U
STATX_UID 0x00000008U
!STATX_GID 0x00000010U
STATX_ATIME 0x00000020U
STATX_MTIME 0x00000040U
STATX_CTIME 0x00000080U
STATX_INO 0x00000100U
STATX_SIZE 0x00000200U
STATX_BLOCKS 0x00000400U

> 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


This is printing Access and Change times, but you write above that
STATX_ATIME, STATX_CTIME, and STATX_BLOCKS are unset for AFS, so they
shouldn't be printed? Since "results" appear to indicate those flags
are set, and looking at the dump_statx() code appears that they are
checked, it seems this patch isn't doing what you want to clear flags?

Also, it seems that "Gid: 0" is printed even though it is not set in stx_mask? Possibly this example is old?

Cheers, Andreas

> Signed-off-by: David Howells <dhowells@redhat.com>
> ---
>
> fs/afs/inode.c | 11 ++++++-----
> 1 file changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/fs/afs/inode.c b/fs/afs/inode.c
> index 86cc7264c21c..99662045b6fb 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 +384,8 @@ 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);
> return 0;
> }
>
>
> --
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Cheers, Andreas




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