[PATCH v5 4/8] ceph: get file size from fscrypt_file when present in inode traces

[xiubli@xxxxxxxxxx]

From: Jeff Layton <jlayton@xxxxxxxxxx>

Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
 fs/ceph/inode.c | 30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 4a7b2b0d88f7..15c2fb1e2c8a 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -978,6 +978,16 @@ int ceph_fill_inode(struct inode *inode, struct page *locked_page,
 		     from_kgid(&init_user_ns, inode->i_gid));
 		ceph_decode_timespec64(&ci->i_btime, &iinfo->btime);
 		ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime);
+
+#ifdef CONFIG_FS_ENCRYPTION
+		if (iinfo->fscrypt_auth_len && !ci->fscrypt_auth) {
+			ci->fscrypt_auth_len = iinfo->fscrypt_auth_len;
+			ci->fscrypt_auth = iinfo->fscrypt_auth;
+			iinfo->fscrypt_auth = NULL;
+			iinfo->fscrypt_auth_len = 0;
+			inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED);
+		}
+#endif
 	}
 
 	if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
@@ -1001,6 +1011,7 @@ int ceph_fill_inode(struct inode *inode, struct page *locked_page,
 
 	if (new_version ||
 	    (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
+		u64 size = info->size;
 		s64 old_pool = ci->i_layout.pool_id;
 		struct ceph_string *old_ns;
 
@@ -1014,10 +1025,17 @@ int ceph_fill_inode(struct inode *inode, struct page *locked_page,
 
 		pool_ns = old_ns;
 
+		if (IS_ENCRYPTED(inode) && size &&
+		    (iinfo->fscrypt_file_len == sizeof(__le64))) {
+			size = __le64_to_cpu(*(__le64 *)iinfo->fscrypt_file);
+			if (info->size != round_up(size, CEPH_FSCRYPT_BLOCK_SIZE))
+				pr_warn("size=%llu fscrypt_file=%llu\n", info->size, size);
+		}
+
 		queue_trunc = ceph_fill_file_size(inode, issued,
 					le32_to_cpu(info->truncate_seq),
 					le64_to_cpu(info->truncate_size),
-					le64_to_cpu(info->size));
+					le64_to_cpu(size));
 		/* only update max_size on auth cap */
 		if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
 		    ci->i_max_size != le64_to_cpu(info->max_size)) {
@@ -1057,16 +1075,6 @@ int ceph_fill_inode(struct inode *inode, struct page *locked_page,
 		xattr_blob = NULL;
 	}
 
-#ifdef CONFIG_FS_ENCRYPTION
-	if (iinfo->fscrypt_auth_len && !ci->fscrypt_auth) {
-		ci->fscrypt_auth_len = iinfo->fscrypt_auth_len;
-		ci->fscrypt_auth = iinfo->fscrypt_auth;
-		iinfo->fscrypt_auth = NULL;
-		iinfo->fscrypt_auth_len = 0;
-		inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED);
-	}
-#endif
-
 	/* finally update i_version */
 	if (le64_to_cpu(info->version) > ci->i_version)
 		ci->i_version = le64_to_cpu(info->version);
-- 
2.27.0