cifs: add bdi backing to mount session

[safe/jmp/linux-2.6] / fs / cifs / cifsfs.c

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 89142b3..ad235d6 100644 (file)
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -50,7 +50,7 @@
 #define CIFS_MAGIC_NUMBER 0xFF534D42   /* the first four bytes of SMB PDUs */
 
 #ifdef CONFIG_CIFS_QUOTA
-static struct quotactl_ops cifs_quotactl_ops;
+static const struct quotactl_ops cifs_quotactl_ops;
 #endif /* QUOTA */
 
 int cifsFYI = 0;
@@ -103,6 +103,12 @@ cifs_read_super(struct super_block *sb, void *data,
        if (cifs_sb == NULL)
                return -ENOMEM;
 
+       rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
+       if (rc) {
+               kfree(cifs_sb);
+               return rc;
+       }
+
 #ifdef CONFIG_CIFS_DFS_UPCALL
        /* copy mount params to sb for use in submounts */
        /* BB: should we move this after the mount so we
@@ -115,6 +121,7 @@ cifs_read_super(struct super_block *sb, void *data,
                int len = strlen(data);
                cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
                if (cifs_sb->mountdata == NULL) {
+                       bdi_destroy(&cifs_sb->bdi);
                        kfree(sb->s_fs_info);
                        sb->s_fs_info = NULL;
                        return -ENOMEM;
@@ -135,6 +142,7 @@ cifs_read_super(struct super_block *sb, void *data,
 
        sb->s_magic = CIFS_MAGIC_NUMBER;
        sb->s_op = &cifs_super_ops;
+       sb->s_bdi = &cifs_sb->bdi;
 /*     if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
            sb->s_blocksize =
                cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
@@ -182,8 +190,8 @@ out_mount_failed:
                        cifs_sb->mountdata = NULL;
                }
 #endif
-               if (cifs_sb->local_nls)
-                       unload_nls(cifs_sb->local_nls);
+               unload_nls(cifs_sb->local_nls);
+               bdi_destroy(&cifs_sb->bdi);
                kfree(cifs_sb);
        }
        return rc;
@@ -215,6 +223,7 @@ cifs_put_super(struct super_block *sb)
 #endif
 
        unload_nls(cifs_sb->local_nls);
+       bdi_destroy(&cifs_sb->bdi);
        kfree(cifs_sb);
 
        unlock_kernel();
@@ -313,6 +322,7 @@ cifs_alloc_inode(struct super_block *sb)
        cifs_inode->clientCanCacheRead = false;
        cifs_inode->clientCanCacheAll = false;
        cifs_inode->delete_pending = false;
+       cifs_inode->invalid_mapping = false;
        cifs_inode->vfs_inode.i_blkbits = 14;  /* 2**14 = CIFS_MAX_MSGSIZE */
        cifs_inode->server_eof = 0;
 
@@ -514,7 +524,7 @@ int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats)
        return rc;
 }
 
-static struct quotactl_ops cifs_quotactl_ops = {
+static const struct quotactl_ops cifs_quotactl_ops = {
        .set_xquota     = cifs_xquota_set,
        .get_xquota     = cifs_xquota_get,
        .set_xstate     = cifs_xstate_set,
@@ -639,7 +649,7 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
                   setting the revalidate time to zero */
                CIFS_I(file->f_path.dentry->d_inode)->time = 0;
 
-               retval = cifs_revalidate(file->f_path.dentry);
+               retval = cifs_revalidate_file(file);
                if (retval < 0)
                        return (loff_t)retval;
        }
@@ -759,7 +769,7 @@ const struct file_operations cifs_file_ops = {
 };
 
 const struct file_operations cifs_file_direct_ops = {
-       /* no mmap, no aio, no readv -
+       /* no aio, no readv -
           BB reevaluate whether they can be done with directio, no cache */
        .read = cifs_user_read,
        .write = cifs_user_write,
@@ -768,6 +778,7 @@ const struct file_operations cifs_file_direct_ops = {
        .lock = cifs_lock,
        .fsync = cifs_fsync,
        .flush = cifs_flush,
+       .mmap = cifs_file_mmap,
        .splice_read = generic_file_splice_read,
 #ifdef CONFIG_CIFS_POSIX
        .unlocked_ioctl  = cifs_ioctl,
@@ -807,6 +818,7 @@ const struct file_operations cifs_file_direct_nobrl_ops = {
        .release = cifs_close,
        .fsync = cifs_fsync,
        .flush = cifs_flush,
+       .mmap = cifs_file_mmap,
        .splice_read = generic_file_splice_read,
 #ifdef CONFIG_CIFS_POSIX
        .unlocked_ioctl  = cifs_ioctl,
@@ -1038,15 +1050,15 @@ init_cifs(void)
        if (rc)
                goto out_unregister_key_type;
 #endif
-       rc = slow_work_register_user();
+       rc = slow_work_register_user(THIS_MODULE);
        if (rc)
                goto out_unregister_resolver_key;
 
        return 0;
 
  out_unregister_resolver_key:
-       unregister_key_type(&key_type_dns_resolver);
 #ifdef CONFIG_CIFS_DFS_UPCALL
+       unregister_key_type(&key_type_dns_resolver);
  out_unregister_key_type:
 #endif
 #ifdef CONFIG_CIFS_UPCALL