Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze

[pandora-kernel.git] / fs / ext4 / extents.c

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 627f7ae..63a7581 100644 (file)
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2845,14 +2845,14 @@ fix_extent_len:
  * to an uninitialized extent.
  *
  * Writing to an uninitized extent may result in splitting the uninitialized
- * extent into multiple /intialized unintialized extents (up to three)
+ * extent into multiple /initialized uninitialized extents (up to three)
  * There are three possibilities:
  *   a> There is no split required: Entire extent should be uninitialized
  *   b> Splits in two extents: Write is happening at either end of the extent
  *   c> Splits in three extents: Somone is writing in middle of the extent
  *
  * One of more index blocks maybe needed if the extent tree grow after
- * the unintialized extent split. To prevent ENOSPC occur at the IO
+ * the uninitialized extent split. To prevent ENOSPC occur at the IO
  * complete, we need to split the uninitialized extent before DIO submit
  * the IO. The uninitialized extent called at this time will be split
  * into three uninitialized extent(at most). After IO complete, the part
@@ -3102,7 +3102,7 @@ static void unmap_underlying_metadata_blocks(struct block_device *bdev,
  * Handle EOFBLOCKS_FL flag, clearing it if necessary
  */
 static int check_eofblocks_fl(handle_t *handle, struct inode *inode,
-                             struct ext4_map_blocks *map,
+                             ext4_lblk_t lblk,
                              struct ext4_ext_path *path,
                              unsigned int len)
 {
@@ -3132,7 +3132,7 @@ static int check_eofblocks_fl(handle_t *handle, struct inode *inode,
         * this turns out to be false, we can bail out from this
         * function immediately.
         */
-       if (map->m_lblk + len < le32_to_cpu(last_ex->ee_block) +
+       if (lblk + len < le32_to_cpu(last_ex->ee_block) +
            ext4_ext_get_actual_len(last_ex))
                return 0;
        /*
@@ -3188,8 +3188,8 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
                                                        path);
                if (ret >= 0) {
                        ext4_update_inode_fsync_trans(handle, inode, 1);
-                       err = check_eofblocks_fl(handle, inode, map, path,
-                                                map->m_len);
+                       err = check_eofblocks_fl(handle, inode, map->m_lblk,
+                                                path, map->m_len);
                } else
                        err = ret;
                goto out2;
@@ -3219,7 +3219,8 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
        ret = ext4_ext_convert_to_initialized(handle, inode, map, path);
        if (ret >= 0) {
                ext4_update_inode_fsync_trans(handle, inode, 1);
-               err = check_eofblocks_fl(handle, inode, map, path, map->m_len);
+               err = check_eofblocks_fl(handle, inode, map->m_lblk, path,
+                                        map->m_len);
                if (err < 0)
                        goto out2;
        }
@@ -3472,7 +3473,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
                        map->m_flags |= EXT4_MAP_UNINIT;
        }
 
-       err = check_eofblocks_fl(handle, inode, map, path, ar.len);
+       err = check_eofblocks_fl(handle, inode, map->m_lblk, path, ar.len);
        if (err)
                goto out2;
 
@@ -3626,14 +3627,15 @@ static void ext4_falloc_update_inode(struct inode *inode,
 }
 
 /*
- * preallocate space for a file. This implements ext4's fallocate inode
+ * preallocate space for a file. This implements ext4's fallocate file
  * operation, which gets called from sys_fallocate system call.
  * For block-mapped files, posix_fallocate should fall back to the method
  * of writing zeroes to the required new blocks (the same behavior which is
  * expected for file systems which do not support fallocate() system call).
  */
-long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len)
+long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
 {
+       struct inode *inode = file->f_path.dentry->d_inode;
        handle_t *handle;
        loff_t new_size;
        unsigned int max_blocks;
@@ -3643,6 +3645,10 @@ long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len)
        struct ext4_map_blocks map;
        unsigned int credits, blkbits = inode->i_blkbits;
 
+       /* We only support the FALLOC_FL_KEEP_SIZE mode */
+       if (mode & ~FALLOC_FL_KEEP_SIZE)
+               return -EOPNOTSUPP;
+
        /*
         * currently supporting (pre)allocate mode for extent-based
         * files _only_
@@ -3650,10 +3656,6 @@ long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len)
        if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
                return -EOPNOTSUPP;
 
-       /* preallocation to directories is currently not supported */
-       if (S_ISDIR(inode->i_mode))
-               return -ENODEV;
-
        map.m_lblk = offset >> blkbits;
        /*
         * We can't just convert len to max_blocks because