[CIFS] Add compat with SFU (part 2)

Creating FIFOs to non-Unix servers (with cifs mounts for which sfu option
was specified) now works.

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

Thanks to Martin Koeppe for his assistance

5 files changed, 64 insertions, 7 deletions

diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index 84d37f8e986e..3cef57b7a34f 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -268,10 +268,18 @@
 /* CreateOptions */
 #define CREATE_NOT_FILE         0x00000001      /* if set must not be file */
 #define CREATE_WRITE_THROUGH    0x00000002
-#define CREATE_NOT_DIR          0x00000040      /* if set must not be directory */
+#define CREATE_SEQUENTIAL       0x00000004
+#define CREATE_SYNC_ALERT       0x00000010
+#define CREATE_ASYNC_ALERT      0x00000020
+#define CREATE_NOT_DIR          0x00000040    /* if set must not be directory */
+#define CREATE_NO_EA_KNOWLEDGE  0x00000200
+#define CREATE_EIGHT_DOT_THREE  0x00000400
 #define CREATE_RANDOM_ACCESS    0x00000800
 #define CREATE_DELETE_ON_CLOSE  0x00001000
+#define CREATE_OPEN_BY_ID       0x00002000
 #define OPEN_REPARSE_POINT      0x00200000
+#define CREATE_OPTIONS_MASK     0x007FFFFF 
+#define CREATE_OPTION_SPECIAL   0x20000000   /* system. NB not sent over wire */
 
 /* ImpersonationLevel flags */
 #define SECURITY_ANONYMOUS      0
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 56d79fd90679..fbe651858c88 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -738,7 +738,13 @@ openRetry:
         }
         pSMB->DesiredAccess = cpu_to_le32(access_flags);
         pSMB->AllocationSize = 0;
-        pSMB->FileAttributes = cpu_to_le32(ATTR_NORMAL);
+        /* set file as system file if special file such
+           as fifo and server expecting SFU style and
+           no Unix extensions */
+        if(create_options & CREATE_OPTION_SPECIAL)
+                pSMB->FileAttributes = cpu_to_le32(ATTR_SYSTEM);
+        else
+                pSMB->FileAttributes = cpu_to_le32(ATTR_NORMAL);
         /* XP does not handle ATTR_POSIX_SEMANTICS */
         /* but it helps speed up case sensitive checks for other
         servers such as Samba */
@@ -752,7 +758,7 @@ openRetry:
                 being created */
         pSMB->ShareAccess = cpu_to_le32(FILE_SHARE_ALL);
         pSMB->CreateDisposition = cpu_to_le32(openDisposition);
-        pSMB->CreateOptions = cpu_to_le32(create_options);
+        pSMB->CreateOptions = cpu_to_le32(create_options & CREATE_OPTIONS_MASK);
         /* BB Expirement with various impersonation levels and verify */
         pSMB->ImpersonationLevel = cpu_to_le32(SECURITY_IMPERSONATION);
         pSMB->SecurityFlags =
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 0d5e27fec92b..c0f20fc09290 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -327,13 +327,39 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, dev_t dev
                                 d_instantiate(direntry, newinode);
                 }
         } else {
-                if((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && 
-                        (special_file(mode))) {
+                if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
+                        int oplock = 0;
+                        u16 fileHandle;
+                        FILE_ALL_INFO * buf;
 
                         cFYI(1,("sfu compat create special file"));
-                        /*      Attributes = cpu_to_le32(ATTR_SYSTEM); 
-                                rc = CIFSSMBOpen(xid, pTcon, full_path, disposition, ...); */
 
+                        buf = kmalloc(sizeof(FILE_ALL_INFO),GFP_KERNEL);
+                        if(buf == NULL) {
+                                kfree(full_path);
+                                FreeXid(xid);
+                                return -ENOMEM;
+                        }
+
+                        rc = CIFSSMBOpen(xid, pTcon, full_path,
+                                         FILE_CREATE, /* fail if exists */
+                                         GENERIC_WRITE /* BB would 
+                                          WRITE_OWNER | WRITE_DAC be better? */,
+                                         /* Create a file and set the
+                                            file attribute to SYSTEM */
+                                         CREATE_NOT_DIR | CREATE_OPTION_SPECIAL,
+                                         &fileHandle, &oplock, buf,
+                                         cifs_sb->local_nls,
+                                         cifs_sb->mnt_cifs_flags & 
+                                            CIFS_MOUNT_MAP_SPECIAL_CHR);
+
+                        if(!rc) {
+                                /* BB Do not bother to decode buf since no
+                                   local inode yet to put timestamps in */
+                                CIFSSMBClose(xid, pTcon, fileHandle);
+                                d_drop(direntry);
+                        }
+                        kfree(buf);
                         /* add code here to set EAs */
                 }
         }
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 95354da606d6..628aa1a9fe64 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -320,6 +320,16 @@ int cifs_get_inode_info(struct inode **pinode,
                    on dirs */
                         inode->i_mode = cifs_sb->mnt_dir_mode;
                         inode->i_mode |= S_IFDIR;
+                } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
+                           (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
+                           /* No need to le64 convert size of zero */
+                           (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) && ) */
+
                 } else {
                         inode->i_mode |= S_IFREG;
                         /* treat the dos attribute of read-only as read-only
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 42310281871c..dec3c9dd04d7 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -148,6 +148,13 @@ static void fill_in_inode(struct inode *tmp_inode,
                         tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
                 }
                 tmp_inode->i_mode |= S_IFDIR;
+        } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && 
+                   (attr & ATTR_SYSTEM) && (end_of_file == 0)) {
+                *pobject_type = DT_FIFO;
+                tmp_inode->i_mode |= S_IFIFO;
+/* BB Finish for SFU style symlinks and devies */
+/*      } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
+                (attr & ATTR_SYSTEM) && ) { */
 /* we no longer mark these because we could not follow them */
 /*        } else if (attr & ATTR_REPARSE) {
                 *pobject_type = DT_LNK;