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ceph: acquire Fs caps when getting dir stats

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We only update the inode's dirstats when we have Fs caps from the MDS.

Declare a new VXATTR_FLAG_DIRSTAT that we set on all dirstats, and have
the vxattr handling code acquire those caps when it's set.

URL: https://tracker.ceph.com/issues/48104
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Jeff Layton 2020-11-03 14:00:26 -05:00 committed by Ilya Dryomov
parent 06a1ad438b
commit 81048c00d1
1 changed files with 6 additions and 3 deletions
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9
fs/ceph/xattr.c
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@ -42,6 +42,7 @@ struct ceph_vxattr {
#define VXATTR_FLAG_READONLY (1<<0)
#define VXATTR_FLAG_HIDDEN (1<<1)
#define VXATTR_FLAG_RSTAT (1<<2)
#define VXATTR_FLAG_DIRSTAT (1<<3)
/* layouts */
@ -347,9 +348,9 @@ static struct ceph_vxattr ceph_dir_vxattrs[] = {
XATTR_LAYOUT_FIELD(dir, layout, object_size),
XATTR_LAYOUT_FIELD(dir, layout, pool),
XATTR_LAYOUT_FIELD(dir, layout, pool_namespace),
XATTR_NAME_CEPH(dir, entries, 0),
XATTR_NAME_CEPH(dir, files, 0),
XATTR_NAME_CEPH(dir, subdirs, 0),
XATTR_NAME_CEPH(dir, entries, VXATTR_FLAG_DIRSTAT),
XATTR_NAME_CEPH(dir, files, VXATTR_FLAG_DIRSTAT),
XATTR_NAME_CEPH(dir, subdirs, VXATTR_FLAG_DIRSTAT),
XATTR_RSTAT_FIELD(dir, rentries),
XATTR_RSTAT_FIELD(dir, rfiles),
XATTR_RSTAT_FIELD(dir, rsubdirs),
@ -837,6 +838,8 @@ ssize_t __ceph_getxattr(struct inode *inode, const char *name, void *value,
int mask = 0;
if (vxattr->flags & VXATTR_FLAG_RSTAT)
mask |= CEPH_STAT_RSTAT;
if (vxattr->flags & VXATTR_FLAG_DIRSTAT)
mask |= CEPH_CAP_FILE_SHARED;
err = ceph_do_getattr(inode, mask, true);
if (err)
return err;