[v3,2/5] ceph: carry snapshot creation time with inodes
diff mbox series

Message ID 20190418121549.30128-3-ddiss@suse.de
State New
Headers show
Series
  • ceph: add snapshot creation time vxattr
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Commit Message

David Disseldorp April 18, 2019, 12:15 p.m. UTC
MDS InodeStat v3 wire structures include a trailing snapshot creation
time member. Unmarshall this and retain it for a future vxattr.

Link: https://tracker.ceph.com/issues/38838
Signed-off-by: David Disseldorp <ddiss@suse.de>
---
 fs/ceph/inode.c      | 1 +
 fs/ceph/mds_client.c | 8 ++++++++
 fs/ceph/mds_client.h | 1 +
 fs/ceph/super.h      | 1 +
 4 files changed, 11 insertions(+)

Patch
diff mbox series

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 2d61ddda9bf5..c2e82aeaf237 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -820,6 +820,7 @@  static int fill_inode(struct inode *inode, struct page *locked_page,
 		dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
 		     from_kuid(&init_user_ns, inode->i_uid),
 		     from_kgid(&init_user_ns, inode->i_gid));
+		ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime);
 	}
 
 	if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 21c33ed048ed..a9f2dc266597 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -166,6 +166,13 @@  static int parse_reply_info_in(void **p, void *end,
 			info->dir_pin = -ENODATA;
 		}
 
+		/* snapshot birth time, remains zero for v<=2 */
+		if (struct_v >= 3) {
+			ceph_decode_need(p, end, sizeof(info->snap_btime), bad);
+			ceph_decode_copy(p, &info->snap_btime,
+					 sizeof(info->snap_btime));
+		}
+
 		*p = end;
 	} else {
 		if (features & CEPH_FEATURE_MDS_INLINE_DATA) {
@@ -198,6 +205,7 @@  static int parse_reply_info_in(void **p, void *end,
 		}
 
 		info->dir_pin = -ENODATA;
+		/* info->snap_btime remains zero */
 	}
 	return 0;
 bad:
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index 50385a481fdb..c5f7eca6ce3e 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -69,6 +69,7 @@  struct ceph_mds_reply_info_in {
 	u64 max_bytes;
 	u64 max_files;
 	s32 dir_pin;
+	struct ceph_timespec snap_btime;
 };
 
 struct ceph_mds_reply_dir_entry {
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 16c03188578e..59233dce4ef4 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -386,6 +386,7 @@  struct ceph_inode_info {
 	int i_snap_realm_counter; /* snap realm (if caps) */
 	struct list_head i_snap_realm_item;
 	struct list_head i_snap_flush_item;
+	struct timespec64 i_snap_btime;
 
 	struct work_struct i_wb_work;  /* writeback work */
 	struct work_struct i_pg_inv_work;  /* page invalidation work */