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authorDavid Disseldorp <ddiss@suse.de>2019-04-18 14:15:47 +0200
committerIlya Dryomov <idryomov@gmail.com>2019-07-08 14:01:41 +0200
commit100cc610a550affcbef13d74855f736b92caa947 (patch)
treefdcf3a5e51ab14da5726853695050bfe12f2f910 /fs/ceph
parent193e7b37628e97c6e66ec26a2c062dace68b4acd (diff)
downloadlinux-100cc610a550affcbef13d74855f736b92caa947.tar.bz2
ceph: add ceph.snap.btime vxattr
The ceph.snap.btime virtual xattr provides the snapshot creation (birth) time in $secs.$nsecs format. Link: https://tracker.ceph.com/issues/38838 Signed-off-by: David Disseldorp <ddiss@suse.de> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/xattr.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 2cbb9c239183..5d8a6f7c5869 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -273,6 +273,19 @@ static size_t ceph_vxattrcb_quota_max_files(struct ceph_inode_info *ci,
return snprintf(val, size, "%llu", ci->i_max_files);
}
+/* snapshots */
+static bool ceph_vxattrcb_snap_btime_exists(struct ceph_inode_info *ci)
+{
+ return (ci->i_snap_btime.tv_sec != 0 || ci->i_snap_btime.tv_nsec != 0);
+}
+
+static size_t ceph_vxattrcb_snap_btime(struct ceph_inode_info *ci, char *val,
+ size_t size)
+{
+ return snprintf(val, size, "%lld.%09ld", ci->i_snap_btime.tv_sec,
+ ci->i_snap_btime.tv_nsec);
+}
+
#define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name
#define CEPH_XATTR_NAME2(_type, _name, _name2) \
XATTR_CEPH_PREFIX #_type "." #_name "." #_name2
@@ -341,6 +354,13 @@ static struct ceph_vxattr ceph_dir_vxattrs[] = {
},
XATTR_QUOTA_FIELD(quota, max_bytes),
XATTR_QUOTA_FIELD(quota, max_files),
+ {
+ .name = "ceph.snap.btime",
+ .name_size = sizeof("ceph.snap.btime"),
+ .getxattr_cb = ceph_vxattrcb_snap_btime,
+ .exists_cb = ceph_vxattrcb_snap_btime_exists,
+ .flags = VXATTR_FLAG_READONLY,
+ },
{ .name = NULL, 0 } /* Required table terminator */
};
static size_t ceph_dir_vxattrs_name_size; /* total size of all names */
@@ -360,6 +380,13 @@ static struct ceph_vxattr ceph_file_vxattrs[] = {
XATTR_LAYOUT_FIELD(file, layout, object_size),
XATTR_LAYOUT_FIELD(file, layout, pool),
XATTR_LAYOUT_FIELD(file, layout, pool_namespace),
+ {
+ .name = "ceph.snap.btime",
+ .name_size = sizeof("ceph.snap.btime"),
+ .getxattr_cb = ceph_vxattrcb_snap_btime,
+ .exists_cb = ceph_vxattrcb_snap_btime_exists,
+ .flags = VXATTR_FLAG_READONLY,
+ },
{ .name = NULL, 0 } /* Required table terminator */
};
static size_t ceph_file_vxattrs_name_size; /* total size of all names */