[CIFS] Recognize properly symlinks and char/blk devices (not just

FIFOs) created by SFU (part 2 of 2).

    Thanks to Martin Koeppe for useful analysis.

    Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index ba9eae56d0119057442a07011d4d7efe65175585..93dd705577bcaf8359c46eddf04891934eae07be 100644 (file)
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -228,9 +228,20 @@ static int decode_sfu_inode(struct inode * inode, __u64 size,
                                 8 /* length */, 0 /* offset */,
                                 &bytes_read, &pbuf);
                if((rc == 0) && (bytes_read == 8)) {
-                       /* if memcmp(IntxCHR\000, pbuf, 8)
-                          else if memcmp(IntxBLK\000, pbuf, 8)
-                          else if memcmp(IntxLNK\001, pbuf, 8) */
+                       cERROR(1,("intx %s" ,pbuf));
+                       if(memcmp("IntxBLK", pbuf, 8) == 0) {
+                               cFYI(1,("Block device"));
+                               inode->i_mode = S_IFBLK;
+                       } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
+                               cFYI(1,("Char device"));
+                               inode->i_mode = S_IFCHR;
+                       } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
+                               cFYI(1,("Symlink"));
+                               inode->i_mode = S_IFLNK;
+                       } else
+                               inode->i_mode = S_IFREG; /* then it is a file */
+                               rc = -EOPNOTSUPP; /* or some unknown SFU type */ 
+                        
                }
                
                CIFSSMBClose(xid, pTcon, netfid);
@@ -244,6 +255,32 @@ static int decode_sfu_inode(struct inode * inode, __u64 size,
        
 }
 
+#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
+
+static int get_sfu_uid_mode(struct inode * inode,
+                       const unsigned char *path,
+                       struct cifs_sb_info *cifs_sb, int xid)
+{
+       ssize_t rc;
+       char ea_value[4];
+       __u32 mode;
+
+       rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
+                       ea_value, 4 /* size of buf */, cifs_sb->local_nls,
+                        cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+       if(rc < 0)
+               return (int)rc;
+       else if (rc > 3) {
+               mode = le32_to_cpu(*((__le32 *)ea_value));
+               inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
+               cFYI(1,("special mode bits 0%o", mode));
+               return 0;
+       } else {
+               return 0;
+       }
+               
+}
+
 int cifs_get_inode_info(struct inode **pinode,
        const unsigned char *search_path, FILE_ALL_INFO *pfindData,
        struct super_block *sb, int xid)
@@ -427,7 +464,10 @@ int cifs_get_inode_info(struct inode **pinode,
 
                /* BB fill in uid and gid here? with help from winbind? 
                   or retrieve from NTFS stream extended attribute */
-               if (atomic_read(&cifsInfo->inUse) == 0) {
+               if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
+                       /* fill in uid, gid, mode from server ACL */
+                       get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
+               } else if (atomic_read(&cifsInfo->inUse) == 0) {
                        inode->i_uid = cifs_sb->mnt_uid;
                        inode->i_gid = cifs_sb->mnt_gid;
                        /* set so we do not keep refreshing these fields with