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smb3: add some more descriptive messages about share when mounting cache=ro

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Add some additional logging so the user can see if the share they
mounted with cache=ro is considered read only by the server

CIFS: Attempting to mount //localhost/test
CIFS VFS: mounting share with read only caching. Ensure that the share will not be modified while in use.
CIFS VFS: read only mount of RW share

CIFS: Attempting to mount //localhost/test-ro
CIFS VFS: mounting share with read only caching. Ensure that the share will not be modified while in use.
CIFS VFS: mounted to read only share

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
This commit is contained in:
Steve French 2019-08-29 22:33:38 -05:00
parent 83bbfa706d
commit 1981ebaabd
1 changed files with 9 additions and 1 deletions
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10
fs/cifs/connect.c
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@ -4197,8 +4197,16 @@ static int mount_get_conns(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
tcon->unix_ext = 0; /* server does not support them */
/* do not care if a following call succeed - informational */
if (!tcon->pipe && server->ops->qfs_tcon)
if (!tcon->pipe && server->ops->qfs_tcon) {
server->ops->qfs_tcon(*xid, tcon);
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE) {
if (tcon->fsDevInfo.DeviceCharacteristics &
FILE_READ_ONLY_DEVICE)
cifs_dbg(VFS, "mounted to read only share\n");
else
cifs_dbg(VFS, "read only mount of RW share\n");
}
}
cifs_sb->wsize = server->ops->negotiate_wsize(tcon, vol);
cifs_sb->rsize = server->ops->negotiate_rsize(tcon, vol);