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authorSteve French <stfrench@microsoft.com>2018-06-29 16:06:15 -0500
committerSteve French <stfrench@microsoft.com>2018-08-07 14:15:56 -0500
commit8a69e96e610b3ec8a55f6fd4e44363452838caa7 (patch)
treef1ce27d75229626abf1202da8da9dda493bda660 /fs/cifs/cifsfs.c
parentc3ed44026cd07fda5976ecb79225759901a160b4 (diff)
smb3: snapshot mounts are read-only and make sure info is displayable about the mount
snapshot mounts were not marked as read-only and did not display the snapshot time (in /proc/mounts) specified on mount With this patch - note that can not write to the snapshot mount (see "ro" in /proc/mounts line) and also the missing snapshot timewarp token time is dumped. Sample line from /proc/mounts with the patch: //127.0.0.1/scratch /mnt2 smb3 ro,relatime,vers=default,cache=strict,username=testuser,domain=,uid=0,noforceuid,gid=0,noforcegid,addr=127.0.0.1,file_mode=0755,dir_mode=0755,soft,nounix,serverino,mapposix,noperm,rsize=1048576,wsize=1048576,echo_interval=60,snapshot=1234567,actimeo=1 0 0 Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Paulo Alcantara <palcantara@suse.de>
Diffstat (limited to 'fs/cifs/cifsfs.c')
-rw-r--r--fs/cifs/cifsfs.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index c162a416ddbf..de16078e456b 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -139,6 +139,9 @@ cifs_read_super(struct super_block *sb)
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
sb->s_flags |= SB_POSIXACL;
+ if (tcon->snapshot_time)
+ sb->s_flags |= SB_RDONLY;
+
if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files)
sb->s_maxbytes = MAX_LFS_FILESIZE;
else
@@ -540,6 +543,8 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
seq_printf(s, ",wsize=%u", cifs_sb->wsize);
seq_printf(s, ",echo_interval=%lu",
tcon->ses->server->echo_interval / HZ);
+ if (tcon->snapshot_time)
+ seq_printf(s, ",snapshot=%llu", tcon->snapshot_time);
/* convert actimeo and display it in seconds */
seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);