Commit 736a3320 authored by Stefan Metzmacher's avatar Stefan Metzmacher Committed by Steve French

cifs: add "mfsymlinks" mount option

This is the start for an implementation of "Minshall+French Symlinks"
(see http://wiki.samba.org/index.php/UNIX_Extensions#Minshall.2BFrench_symlinks).
Signed-off-by: default avatarStefan Metzmacher <metze@samba.org>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent 1b12b9c1
......@@ -527,6 +527,11 @@ A partial list of the supported mount options follows:
SFU does). In the future the bottom 9 bits of the
mode also will be emulated using queries of the security
descriptor (ACL).
mfsymlinks Enable support for Minshall+French symlinks
(see http://wiki.samba.org/index.php/UNIX_Extensions#Minshall.2BFrench_symlinks)
This option is ignored when specified together with the
'sfu' option. Minshall+French symlinks are used even if
the server supports the CIFS Unix Extensions.
sign Must use packet signing (helps avoid unwanted data modification
by intermediate systems in the route). Note that signing
does not work with lanman or plaintext authentication.
......
......@@ -441,6 +441,8 @@ cifs_show_options(struct seq_file *s, struct vfsmount *m)
seq_printf(s, ",dynperm");
if (m->mnt_sb->s_flags & MS_POSIXACL)
seq_printf(s, ",acl");
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
seq_printf(s, ",mfsymlinks");
seq_printf(s, ",rsize=%d", cifs_sb->rsize);
seq_printf(s, ",wsize=%d", cifs_sb->wsize);
......
......@@ -100,6 +100,7 @@ struct smb_vol {
bool noautotune:1;
bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
bool fsc:1; /* enable fscache */
bool mfsymlinks:1; /* use Minshall+French Symlinks */
unsigned int rsize;
unsigned int wsize;
bool sockopt_tcp_nodelay:1;
......@@ -1342,6 +1343,8 @@ cifs_parse_mount_options(char *options, const char *devname,
"/proc/fs/cifs/LookupCacheEnabled to 0\n");
} else if (strnicmp(data, "fsc", 3) == 0) {
vol->fsc = true;
} else if (strnicmp(data, "mfsymlinks", 10) == 0) {
vol->mfsymlinks = true;
} else
printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
data);
......@@ -2554,6 +2557,14 @@ static void setup_cifs_sb(struct smb_vol *pvolume_info,
cFYI(1, "mounting share using direct i/o");
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
}
if (pvolume_info->mfsymlinks) {
if (pvolume_info->sfu_emul) {
cERROR(1, "mount option mfsymlinks ignored if sfu "
"mount option is used");
} else {
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
}
}
if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
cERROR(1, "mount option dynperm ignored if cifsacl "
......
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