cifs: don't allow mmap'ed pages to be dirtied while under writeback (try #3)

[pandora-kernel.git] / fs / cifs / cifsfs.c

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index d9f652a..5c412b3 100644 (file)
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -53,7 +53,6 @@ int cifsFYI = 0;
 int cifsERROR = 1;
 int traceSMB = 0;
 unsigned int oplockEnabled = 1;
-unsigned int experimEnabled = 0;
 unsigned int linuxExtEnabled = 1;
 unsigned int lookupCacheEnabled = 1;
 unsigned int multiuser_mount = 0;
@@ -77,7 +76,11 @@ unsigned int cifs_max_pending = CIFS_MAX_REQ;
 module_param(cifs_max_pending, int, 0);
 MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
                                   "Default: 50 Range: 2 to 256");
-
+unsigned short echo_retries = 5;
+module_param(echo_retries, ushort, 0644);
+MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and "
+                              "reconnecting server. Default: 5. 0 means "
+                              "never reconnect.");
 extern mempool_t *cifs_sm_req_poolp;
 extern mempool_t *cifs_req_poolp;
 extern mempool_t *cifs_mid_poolp;
@@ -123,6 +126,7 @@ cifs_read_super(struct super_block *sb, void *data,
                kfree(cifs_sb);
                return rc;
        }
+       cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages;
 
 #ifdef CONFIG_CIFS_DFS_UPCALL
        /* copy mount params to sb for use in submounts */
@@ -405,8 +409,8 @@ cifs_show_options(struct seq_file *s, struct vfsmount *m)
 
        if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
                seq_printf(s, ",multiuser");
-       else if (tcon->ses->userName)
-               seq_printf(s, ",username=%s", tcon->ses->userName);
+       else if (tcon->ses->user_name)
+               seq_printf(s, ",username=%s", tcon->ses->user_name);
 
        if (tcon->ses->domainName)
                seq_printf(s, ",domain=%s", tcon->ses->domainName);
@@ -596,10 +600,17 @@ static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
 {
        struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
        ssize_t written;
+       int rc;
 
        written = generic_file_aio_write(iocb, iov, nr_segs, pos);
-       if (!CIFS_I(inode)->clientCanCacheAll)
-               filemap_fdatawrite(inode->i_mapping);
+
+       if (CIFS_I(inode)->clientCanCacheAll)
+               return written;
+
+       rc = filemap_fdatawrite(inode->i_mapping);
+       if (rc)
+               cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
+
        return written;
 }
 
@@ -729,6 +740,25 @@ const struct file_operations cifs_file_ops = {
        .setlease = cifs_setlease,
 };
 
+const struct file_operations cifs_file_strict_ops = {
+       .read = do_sync_read,
+       .write = do_sync_write,
+       .aio_read = cifs_strict_readv,
+       .aio_write = cifs_strict_writev,
+       .open = cifs_open,
+       .release = cifs_close,
+       .lock = cifs_lock,
+       .fsync = cifs_strict_fsync,
+       .flush = cifs_flush,
+       .mmap = cifs_file_strict_mmap,
+       .splice_read = generic_file_splice_read,
+       .llseek = cifs_llseek,
+#ifdef CONFIG_CIFS_POSIX
+       .unlocked_ioctl = cifs_ioctl,
+#endif /* CONFIG_CIFS_POSIX */
+       .setlease = cifs_setlease,
+};
+
 const struct file_operations cifs_file_direct_ops = {
        /* no aio, no readv -
           BB reevaluate whether they can be done with directio, no cache */
@@ -747,6 +777,7 @@ const struct file_operations cifs_file_direct_ops = {
        .llseek = cifs_llseek,
        .setlease = cifs_setlease,
 };
+
 const struct file_operations cifs_file_nobrl_ops = {
        .read = do_sync_read,
        .write = do_sync_write,
@@ -765,6 +796,24 @@ const struct file_operations cifs_file_nobrl_ops = {
        .setlease = cifs_setlease,
 };
 
+const struct file_operations cifs_file_strict_nobrl_ops = {
+       .read = do_sync_read,
+       .write = do_sync_write,
+       .aio_read = cifs_strict_readv,
+       .aio_write = cifs_strict_writev,
+       .open = cifs_open,
+       .release = cifs_close,
+       .fsync = cifs_strict_fsync,
+       .flush = cifs_flush,
+       .mmap = cifs_file_strict_mmap,
+       .splice_read = generic_file_splice_read,
+       .llseek = cifs_llseek,
+#ifdef CONFIG_CIFS_POSIX
+       .unlocked_ioctl = cifs_ioctl,
+#endif /* CONFIG_CIFS_POSIX */
+       .setlease = cifs_setlease,
+};
+
 const struct file_operations cifs_file_direct_nobrl_ops = {
        /* no mmap, no aio, no readv -
           BB reevaluate whether they can be done with directio, no cache */