xps: Transmit Packet Steering

[net-next-2.6.git] / fs / libfs.c

diff --git a/fs/libfs.c b/fs/libfs.c
index 0a9da95317f76a6ffdebb9120a3e71dc0ff4cf72..a3accdf528add9161bd6dccfb84f7c08ccb28437 100644 (file)
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -201,9 +201,8 @@ static const struct super_operations simple_super_operations = {
  * Common helper for pseudo-filesystems (sockfs, pipefs, bdev - stuff that
  * will never be mountable)
  */
-int get_sb_pseudo(struct file_system_type *fs_type, char *name,
-       const struct super_operations *ops, unsigned long magic,
-       struct vfsmount *mnt)
+struct dentry *mount_pseudo(struct file_system_type *fs_type, char *name,
+       const struct super_operations *ops, unsigned long magic)
 {
        struct super_block *s = sget(fs_type, NULL, set_anon_super, NULL);
        struct dentry *dentry;
@@ -211,7 +210,7 @@ int get_sb_pseudo(struct file_system_type *fs_type, char *name,
        struct qstr d_name = {.name = name, .len = strlen(name)};
 
        if (IS_ERR(s))
-               return PTR_ERR(s);
+               return ERR_CAST(s);
 
        s->s_flags = MS_NOUSER;
        s->s_maxbytes = MAX_LFS_FILESIZE;
@@ -241,12 +240,11 @@ int get_sb_pseudo(struct file_system_type *fs_type, char *name,
        d_instantiate(dentry, root);
        s->s_root = dentry;
        s->s_flags |= MS_ACTIVE;
-       simple_set_mnt(mnt, s);
-       return 0;
+       return dget(s->s_root);
 
 Enomem:
        deactivate_locked_super(s);
-       return -ENOMEM;
+       return ERR_PTR(-ENOMEM);
 }
 
 int simple_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
@@ -255,7 +253,7 @@ int simple_link(struct dentry *old_dentry, struct inode *dir, struct dentry *den
 
        inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
        inc_nlink(inode);
-       atomic_inc(&inode->i_count);
+       ihold(inode);
        dget(dentry);
        d_instantiate(dentry, inode);
        return 0;
@@ -892,10 +890,6 @@ EXPORT_SYMBOL_GPL(generic_fh_to_parent);
  */
 int generic_file_fsync(struct file *file, int datasync)
 {
-       struct writeback_control wbc = {
-               .sync_mode = WB_SYNC_ALL,
-               .nr_to_write = 0, /* metadata-only; caller takes care of data */
-       };
        struct inode *inode = file->f_mapping->host;
        int err;
        int ret;
@@ -906,13 +900,42 @@ int generic_file_fsync(struct file *file, int datasync)
        if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
                return ret;
 
-       err = sync_inode(inode, &wbc);
+       err = sync_inode_metadata(inode, 1);
        if (ret == 0)
                ret = err;
        return ret;
 }
 EXPORT_SYMBOL(generic_file_fsync);
 
+/**
+ * generic_check_addressable - Check addressability of file system
+ * @blocksize_bits:    log of file system block size
+ * @num_blocks:                number of blocks in file system
+ *
+ * Determine whether a file system with @num_blocks blocks (and a
+ * block size of 2**@blocksize_bits) is addressable by the sector_t
+ * and page cache of the system.  Return 0 if so and -EFBIG otherwise.
+ */
+int generic_check_addressable(unsigned blocksize_bits, u64 num_blocks)
+{
+       u64 last_fs_block = num_blocks - 1;
+       u64 last_fs_page =
+               last_fs_block >> (PAGE_CACHE_SHIFT - blocksize_bits);
+
+       if (unlikely(num_blocks == 0))
+               return 0;
+
+       if ((blocksize_bits < 9) || (blocksize_bits > PAGE_CACHE_SHIFT))
+               return -EINVAL;
+
+       if ((last_fs_block > (sector_t)(~0ULL) >> (blocksize_bits - 9)) ||
+           (last_fs_page > (pgoff_t)(~0ULL))) {
+               return -EFBIG;
+       }
+       return 0;
+}
+EXPORT_SYMBOL(generic_check_addressable);
+
 /*
  * No-op implementation of ->fsync for in-memory filesystems.
  */
@@ -926,7 +949,7 @@ EXPORT_SYMBOL(dcache_dir_lseek);
 EXPORT_SYMBOL(dcache_dir_open);
 EXPORT_SYMBOL(dcache_readdir);
 EXPORT_SYMBOL(generic_read_dir);
-EXPORT_SYMBOL(get_sb_pseudo);
+EXPORT_SYMBOL(mount_pseudo);
 EXPORT_SYMBOL(simple_write_begin);
 EXPORT_SYMBOL(simple_write_end);
 EXPORT_SYMBOL(simple_dir_inode_operations);