[CIFS] Add compat with SFU (part 1)

This should help the case of creating fifos and other special files to
servers which do not support the Unix extensions.

Signed-off-by: Steve French (sfrench@us.ibm.com)

Thanks to Martin Koeppe for his suggestions and good analysis

1 files changed, 7 insertions, 0 deletions

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index f6d2a7974fc1..36f78596c81a 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -75,6 +75,7 @@ struct smb_vol {
         unsigned direct_io:1;
         unsigned remap:1;   /* set to remap seven reserved chars in filenames */
         unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
+        unsigned sfu_emul:1;
         unsigned int rsize;
         unsigned int wsize;
         unsigned int sockopt;
@@ -1027,6 +1028,10 @@ cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
                         vol->remap = 1;
                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
                         vol->remap = 0;
+                } else if (strnicmp(data, "sfu", 3) == 0) {
+                        vol->sfu_emul = 1;
+                } else if (strnicmp(data, "nosfu", 5) == 0) {
+                        vol->sfu_emul = 0;
                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
                         vol->posix_paths = 1;
                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
@@ -1687,6 +1692,8 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
                 if(volume_info.no_xattr)
                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
+                if(volume_info.sfu_emul)
+                        cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
 
                 if(volume_info.direct_io) {
                         cERROR(1,("mounting share using direct i/o"));