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

created by SFU (part 1 of 2).

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

1 files changed, 64 insertions, 10 deletions

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 941b247fceb0..ba9eae56d011 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -97,9 +97,9 @@ int cifs_get_inode_info_unix(struct inode **pinode,
                 inode = *pinode;
                 cifsInfo = CIFS_I(inode);
 
-                cFYI(1, (" Old time %ld ", cifsInfo->time));
+                cFYI(1, ("Old time %ld ", cifsInfo->time));
                 cifsInfo->time = jiffies;
-                cFYI(1, (" New time %ld ", cifsInfo->time));
+                cFYI(1, ("New time %ld ", cifsInfo->time));
                 /* this is ok to set on every inode revalidate */
                 atomic_set(&cifsInfo->inUse,1);
 
@@ -195,6 +195,55 @@ int cifs_get_inode_info_unix(struct inode **pinode,
         return rc;
 }
 
+static int decode_sfu_inode(struct inode * inode, __u64 size,
+                            const unsigned char *path,
+                            struct cifs_sb_info *cifs_sb, int xid)
+{
+        int rc;
+        int oplock = FALSE;
+        __u16 netfid;
+        struct cifsTconInfo *pTcon = cifs_sb->tcon;
+        char buf[8];
+        unsigned int bytes_read;
+        char * pbuf;
+
+        pbuf = buf;
+
+        if(size == 0) {
+                inode->i_mode |= S_IFIFO;
+                return 0;
+        } else if (size < 8) {
+                return -EINVAL;  /* EOPNOTSUPP? */
+        }
+                
+        rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
+                         CREATE_NOT_DIR, &netfid, &oplock, NULL,
+                         cifs_sb->local_nls,
+                         cifs_sb->mnt_cifs_flags &
+                                CIFS_MOUNT_MAP_SPECIAL_CHR);
+        if (rc==0) {
+                        /* Read header */
+                rc = CIFSSMBRead(xid, pTcon,
+                                 netfid,
+                                 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) */
+                }
+                
+                CIFSSMBClose(xid, pTcon, netfid);
+        
+
+        /* inode->i_rdev = MKDEV(le64_to_cpu(DevMajor),
+                            le64_to_cpu(DevMinor) & MINORMASK);*/
+/*      inode->i_mode |= S_IFBLK; */
+        }
+        return rc;
+        
+}
+
 int cifs_get_inode_info(struct inode **pinode,
         const unsigned char *search_path, FILE_ALL_INFO *pfindData,
         struct super_block *sb, int xid)
@@ -207,7 +256,7 @@ int cifs_get_inode_info(struct inode **pinode,
         char *buf = NULL;
 
         pTcon = cifs_sb->tcon;
-        cFYI(1,("Getting info on %s ", search_path));
+        cFYI(1,("Getting info on %s", search_path));
 
         if ((pfindData == NULL) && (*pinode != NULL)) {
                 if (CIFS_I(*pinode)->clientCanCacheRead) {
@@ -345,10 +394,15 @@ int cifs_get_inode_info(struct inode **pinode,
                            (pfindData->EndOfFile == 0)) {
                         inode->i_mode = cifs_sb->mnt_file_mode;
                         inode->i_mode |= S_IFIFO;
-/* BB Finish for SFU style symlinks and devies */
-/*              } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
-                           (cifsInfo->cifsAttrs & ATTR_SYSTEM) && ) */
-
+/* BB Finish for SFU style symlinks and devices */
+                } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
+                           (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
+                        if (decode_sfu_inode(inode, 
+                                         le64_to_cpu(pfindData->EndOfFile),
+                                         search_path,
+                                         cifs_sb, xid)) {
+                                cFYI(1,("Unrecognized sfu inode type"));
+                        }
                 } else {
                         inode->i_mode |= S_IFREG;
                         /* treat the dos attribute of read-only as read-only
@@ -382,7 +436,7 @@ int cifs_get_inode_info(struct inode **pinode,
                 }
 
                 if (S_ISREG(inode->i_mode)) {
-                        cFYI(1, (" File inode "));
+                        cFYI(1, ("File inode"));
                         inode->i_op = &cifs_file_inode_ops;
                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
@@ -400,11 +454,11 @@ int cifs_get_inode_info(struct inode **pinode,
                              4096 + MAX_CIFS_HDR_SIZE)
                                 inode->i_data.a_ops->readpages = NULL;
                 } else if (S_ISDIR(inode->i_mode)) {
-                        cFYI(1, (" Directory inode "));
+                        cFYI(1, ("Directory inode"));
                         inode->i_op = &cifs_dir_inode_ops;
                         inode->i_fop = &cifs_dir_ops;
                 } else if (S_ISLNK(inode->i_mode)) {
-                        cFYI(1, (" Symbolic Link inode "));
+                        cFYI(1, ("Symbolic Link inode"));
                         inode->i_op = &cifs_symlink_inode_ops;
                 } else {
                         init_special_inode(inode, inode->i_mode,