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List:       linux-api
Subject:    [PATCH v3 7/7] ceph: fill in the change attribute in statx requests
From:       Jeff Layton <jlayton () kernel ! org>
Date:       2022-08-26 21:47:03
Message-ID: 20220826214703.134870-8-jlayton () kernel ! org
[Download RAW message or body]

When statx requests the change attribute, request the full gamut of caps
(similarly to how ctime is handled). When the change attribute seems to
be valid, return it in the ino_version field.

Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/ceph/inode.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 42351d7a0dd6..ccc926a7dcb0 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -2415,10 +2415,10 @@ static int statx_to_caps(u32 want, umode_t mode)
 {
 	int mask = 0;
 
-	if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME))
+	if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME|STATX_INO_VERSION))
 		mask |= CEPH_CAP_AUTH_SHARED;
 
-	if (want & (STATX_NLINK|STATX_CTIME)) {
+	if (want & (STATX_NLINK|STATX_CTIME|STATX_INO_VERSION)) {
 		/*
 		 * The link count for directories depends on inode->i_subdirs,
 		 * and that is only updated when Fs caps are held.
@@ -2429,11 +2429,10 @@ static int statx_to_caps(u32 want, umode_t mode)
 			mask |= CEPH_CAP_LINK_SHARED;
 	}
 
-	if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|
-		    STATX_BLOCKS))
+	if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|STATX_BLOCKS|STATX_INO_VERSION))
 		mask |= CEPH_CAP_FILE_SHARED;
 
-	if (want & (STATX_CTIME))
+	if (want & (STATX_CTIME|STATX_INO_VERSION))
 		mask |= CEPH_CAP_XATTR_SHARED;
 
 	return mask;
@@ -2475,6 +2474,11 @@ int ceph_getattr(struct user_namespace *mnt_userns, const struct path *path,
 		valid_mask |= STATX_BTIME;
 	}
 
+	if (request_mask & STATX_INO_VERSION) {
+		stat->ino_version = inode_peek_iversion_raw(inode);
+		valid_mask |= STATX_INO_VERSION;
+	}
+
 	if (ceph_snap(inode) == CEPH_NOSNAP)
 		stat->dev = inode->i_sb->s_dev;
 	else
-- 
2.37.2

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