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authorAmir Goldstein <amir73il@users.sf.net>2011-05-09 10:46:41 -0400
committerTheodore Ts'o <tytso@mit.edu>2011-05-09 10:46:41 -0400
commit2846e82004a8d5ef0a63cd3209c84ea5cd796f11 (patch)
tree3b20c08ce64e918d4217bb95228fc597c63bf0e0 /fs/ext4/balloc.c
parent66bb82798d9ff896271d13f5020f7fb9b7d88e1a (diff)
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ext4: move ext4_add_groupblocks() to mballoc.c
In preparation for the next patch, the function ext4_add_groupblocks() is moved to mballoc.c, where it could use some static functions. Signed-off-by: Amir Goldstein <amir73il@users.sf.net> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/balloc.c')
-rw-r--r--fs/ext4/balloc.c124
1 files changed, 0 insertions, 124 deletions
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 9c6cd51..b2d10da 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -362,130 +362,6 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
}
/**
- * ext4_add_groupblocks() -- Add given blocks to an existing group
- * @handle: handle to this transaction
- * @sb: super block
- * @block: start physcial block to add to the block group
- * @count: number of blocks to free
- *
- * This marks the blocks as free in the bitmap. We ask the
- * mballoc to reload the buddy after this by setting group
- * EXT4_GROUP_INFO_NEED_INIT_BIT flag
- */
-void ext4_add_groupblocks(handle_t *handle, struct super_block *sb,
- ext4_fsblk_t block, unsigned long count)
-{
- struct buffer_head *bitmap_bh = NULL;
- struct buffer_head *gd_bh;
- ext4_group_t block_group;
- ext4_grpblk_t bit;
- unsigned int i;
- struct ext4_group_desc *desc;
- struct ext4_sb_info *sbi = EXT4_SB(sb);
- int err = 0, ret, blk_free_count;
- ext4_grpblk_t blocks_freed;
- struct ext4_group_info *grp;
-
- ext4_debug("Adding block(s) %llu-%llu\n", block, block + count - 1);
-
- ext4_get_group_no_and_offset(sb, block, &block_group, &bit);
- grp = ext4_get_group_info(sb, block_group);
- /*
- * Check to see if we are freeing blocks across a group
- * boundary.
- */
- if (bit + count > EXT4_BLOCKS_PER_GROUP(sb)) {
- goto error_return;
- }
- bitmap_bh = ext4_read_block_bitmap(sb, block_group);
- if (!bitmap_bh)
- goto error_return;
- desc = ext4_get_group_desc(sb, block_group, &gd_bh);
- if (!desc)
- goto error_return;
-
- if (in_range(ext4_block_bitmap(sb, desc), block, count) ||
- in_range(ext4_inode_bitmap(sb, desc), block, count) ||
- in_range(block, ext4_inode_table(sb, desc), sbi->s_itb_per_group) ||
- in_range(block + count - 1, ext4_inode_table(sb, desc),
- sbi->s_itb_per_group)) {
- ext4_error(sb, "Adding blocks in system zones - "
- "Block = %llu, count = %lu",
- block, count);
- goto error_return;
- }
-
- /*
- * We are about to add blocks to the bitmap,
- * so we need undo access.
- */
- BUFFER_TRACE(bitmap_bh, "getting undo access");
- err = ext4_journal_get_undo_access(handle, bitmap_bh);
- if (err)
- goto error_return;
-
- /*
- * We are about to modify some metadata. Call the journal APIs
- * to unshare ->b_data if a currently-committing transaction is
- * using it
- */
- BUFFER_TRACE(gd_bh, "get_write_access");
- err = ext4_journal_get_write_access(handle, gd_bh);
- if (err)
- goto error_return;
- /*
- * make sure we don't allow a parallel init on other groups in the
- * same buddy cache
- */
- down_write(&grp->alloc_sem);
- for (i = 0, blocks_freed = 0; i < count; i++) {
- BUFFER_TRACE(bitmap_bh, "clear bit");
- if (!ext4_clear_bit_atomic(ext4_group_lock_ptr(sb, block_group),
- bit + i, bitmap_bh->b_data)) {
- ext4_error(sb, "bit already cleared for block %llu",
- (ext4_fsblk_t)(block + i));
- BUFFER_TRACE(bitmap_bh, "bit already cleared");
- } else {
- blocks_freed++;
- }
- }
- ext4_lock_group(sb, block_group);
- blk_free_count = blocks_freed + ext4_free_blks_count(sb, desc);
- ext4_free_blks_set(sb, desc, blk_free_count);
- desc->bg_checksum = ext4_group_desc_csum(sbi, block_group, desc);
- ext4_unlock_group(sb, block_group);
- percpu_counter_add(&sbi->s_freeblocks_counter, blocks_freed);
-
- if (sbi->s_log_groups_per_flex) {
- ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
- atomic_add(blocks_freed,
- &sbi->s_flex_groups[flex_group].free_blocks);
- }
- /*
- * request to reload the buddy with the
- * new bitmap information
- */
- set_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &(grp->bb_state));
- grp->bb_free += blocks_freed;
- up_write(&grp->alloc_sem);
-
- /* We dirtied the bitmap block */
- BUFFER_TRACE(bitmap_bh, "dirtied bitmap block");
- err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh);
-
- /* And the group descriptor block */
- BUFFER_TRACE(gd_bh, "dirtied group descriptor block");
- ret = ext4_handle_dirty_metadata(handle, NULL, gd_bh);
- if (!err)
- err = ret;
-
-error_return:
- brelse(bitmap_bh);
- ext4_std_error(sb, err);
- return;
-}
-
-/**
* ext4_has_free_blocks()
* @sbi: in-core super block structure.
* @nblocks: number of needed blocks
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