[CIFS] Fix scheduling while atomic when pending writes at file close time

Fix the case in which readdir reset file type when SFU mount option
specified.

Also fix sfu related functions to not request EAs (xattrs) when not
configured in Kconfig

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

2 files changed, 56 insertions, 22 deletions

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 93dd705577bc..ffc7305841b3 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -41,7 +41,7 @@ int cifs_get_inode_info_unix(struct inode **pinode,
         char *tmp_path;
 
         pTcon = cifs_sb->tcon;
-        cFYI(1, (" Getting info on %s ", search_path));
+        cFYI(1, ("Getting info on %s ", search_path));
         /* could have done a find first instead but this returns more info */
         rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
                                   cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
@@ -111,6 +111,9 @@ int cifs_get_inode_info_unix(struct inode **pinode,
                 inode->i_ctime =
                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
                 inode->i_mode = le64_to_cpu(findData.Permissions);
+                /* since we set the inode type below we need to mask off
+                   to avoid strange results if bits set above */
+                        inode->i_mode &= ~S_IFMT;
                 if (type == UNIX_FILE) {
                         inode->i_mode |= S_IFREG;
                 } else if (type == UNIX_SYMLINK) {
@@ -129,6 +132,10 @@ int cifs_get_inode_info_unix(struct inode **pinode,
                         inode->i_mode |= S_IFIFO;
                 } else if (type == UNIX_SOCKET) {
                         inode->i_mode |= S_IFSOCK;
+                } else {
+                        /* safest to call it a file if we do not know */
+                        inode->i_mode |= S_IFREG;
+                        cFYI(1,("unknown type %d",type));
                 }
                 inode->i_uid = le64_to_cpu(findData.Uid);
                 inode->i_gid = le64_to_cpu(findData.Gid);
@@ -228,20 +235,19 @@ static int decode_sfu_inode(struct inode * inode, __u64 size,
                                  8 /* length */, 0 /* offset */,
                                  &bytes_read, &pbuf);
                 if((rc == 0) && (bytes_read == 8)) {
-                        cERROR(1,("intx %s" ,pbuf));
                         if(memcmp("IntxBLK", pbuf, 8) == 0) {
                                 cFYI(1,("Block device"));
-                                inode->i_mode = S_IFBLK;
+                                inode->i_mode |= S_IFBLK;
                         } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
                                 cFYI(1,("Char device"));
-                                inode->i_mode = S_IFCHR;
+                                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 */ 
-                         
+                                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);
@@ -261,6 +267,7 @@ static int get_sfu_uid_mode(struct inode * inode,
                         const unsigned char *path,
                         struct cifs_sb_info *cifs_sb, int xid)
 {
+#ifdef CONFIG_CIFS_XATTR
         ssize_t rc;
         char ea_value[4];
         __u32 mode;
@@ -272,12 +279,17 @@ static int get_sfu_uid_mode(struct inode * inode,
                 return (int)rc;
         else if (rc > 3) {
                 mode = le32_to_cpu(*((__le32 *)ea_value));
+                cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
                 inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
                 cFYI(1,("special mode bits 0%o", mode));
                 return 0;
         } else {
                 return 0;
         }
+#else
+        return -EOPNOTSUPP;
+#endif
+
                 
 }
 
@@ -394,9 +406,9 @@ int cifs_get_inode_info(struct inode **pinode,
                 inode = *pinode;
                 cifsInfo = CIFS_I(inode);
                 cifsInfo->cifsAttrs = attr;
-                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));
 
                 /* blksize needs to be multiple of two. So safer to default to
                 blksize and blkbits set in superblock so 2**blkbits and blksize
@@ -410,13 +422,15 @@ int cifs_get_inode_info(struct inode **pinode,
                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
                 inode->i_ctime =
                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
-                cFYI(0, (" Attributes came in as 0x%x ", attr));
+                cFYI(0, ("Attributes came in as 0x%x ", attr));
 
                 /* set default mode. will override for dirs below */
                 if (atomic_read(&cifsInfo->inUse) == 0)
                         /* new inode, can safely set these fields */
                         inode->i_mode = cifs_sb->mnt_file_mode;
-
+                else /* since we set the inode type below we need to mask off
+                     to avoid strange results if type changes and both get orred in */ 
+                        inode->i_mode &= ~S_IFMT; 
 /*              if (attr & ATTR_REPARSE)  */
                 /* We no longer handle these as symlinks because we could not
                    follow them due to the absolute path with drive letter */
@@ -440,6 +454,7 @@ int cifs_get_inode_info(struct inode **pinode,
                                          cifs_sb, xid)) {
                                 cFYI(1,("Unrecognized sfu inode type"));
                         }
+                        cFYI(1,("sfu mode 0%o",inode->i_mode));
                 } else {
                         inode->i_mode |= S_IFREG;
                         /* treat the dos attribute of read-only as read-only
@@ -535,7 +550,7 @@ int cifs_unlink(struct inode *inode, struct dentry *direntry)
         struct cifsInodeInfo *cifsInode;
         FILE_BASIC_INFO *pinfo_buf;
 
-        cFYI(1, (" cifs_unlink, inode = 0x%p with ", inode));
+        cFYI(1, ("cifs_unlink, inode = 0x%p with ", inode));
 
         xid = GetXid();
 
@@ -755,7 +770,7 @@ int cifs_rmdir(struct inode *inode, struct dentry *direntry)
         char *full_path = NULL;
         struct cifsInodeInfo *cifsInode;
 
-        cFYI(1, (" cifs_rmdir, inode = 0x%p with ", inode));
+        cFYI(1, ("cifs_rmdir, inode = 0x%p with ", inode));
 
         xid = GetXid();
 
@@ -1074,7 +1089,7 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
 
         xid = GetXid();
 
-        cFYI(1, (" In cifs_setattr, name = %s attrs->iavalid 0x%x ",
+        cFYI(1, ("In cifs_setattr, name = %s attrs->iavalid 0x%x ",
                  direntry->d_name.name, attrs->ia_valid));
         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
         pTcon = cifs_sb->tcon;
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 9b7e0ff9584b..9bdaaecae36f 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -142,6 +142,11 @@ static void fill_in_inode(struct inode *tmp_inode,
                 tmp_inode->i_gid = cifs_sb->mnt_gid;
                 /* set default mode. will override for dirs below */
                 tmp_inode->i_mode = cifs_sb->mnt_file_mode;
+        } else {
+                /* mask off the type bits since it gets set
+                below and we do not want to get two type
+                bits set */
+                tmp_inode->i_mode &= ~S_IFMT;
         }
 
         if (attr & ATTR_DIRECTORY) {
@@ -152,12 +157,18 @@ static void fill_in_inode(struct inode *tmp_inode,
                 }
                 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) && ) { */
+                   (attr & ATTR_SYSTEM)) {
+                if (end_of_file == 0)  {
+                        *pobject_type = DT_FIFO;
+                        tmp_inode->i_mode |= S_IFIFO;
+                } else {
+                        /* rather than get the type here, we mark the
+                        inode as needing revalidate and get the real type
+                        (blk vs chr vs. symlink) later ie in lookup */
+                        *pobject_type = DT_REG;
+                        tmp_inode->i_mode |= S_IFREG; 
+                        cifsInfo->time = 0;     
+                }
 /* we no longer mark these because we could not follow them */
 /*        } else if (attr & ATTR_REPARSE) {
                 *pobject_type = DT_LNK;
@@ -264,6 +275,9 @@ static void unix_fill_in_inode(struct inode *tmp_inode,
             cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
 
         tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
+        /* since we set the inode type below we need to mask off type
+           to avoid strange results if bits above were corrupt */
+        tmp_inode->i_mode &= ~S_IFMT;
         if (type == UNIX_FILE) {
                 *pobject_type = DT_REG;
                 tmp_inode->i_mode |= S_IFREG;
@@ -289,6 +303,11 @@ static void unix_fill_in_inode(struct inode *tmp_inode,
         } else if (type == UNIX_SOCKET) {
                 *pobject_type = DT_SOCK;
                 tmp_inode->i_mode |= S_IFSOCK;
+        } else {
+                /* safest to just call it a file */
+                *pobject_type = DT_REG;
+                tmp_inode->i_mode |= S_IFREG;
+                cFYI(1,("unknown inode type %d",type)); 
         }
 
         tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);