#include "ext2fs.h"
/*
+ * Check for uninit block bitmaps and deal with them appropriately
+ */
+static check_block_uninit(ext2_filsys fs, ext2fs_block_bitmap map,
+ dgrp_t group)
+{
+ int i;
+ blk_t blk, super_blk, old_desc_blk, new_desc_blk;
+ int old_desc_blocks;
+
+ if (!(EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) ||
+ !(fs->group_desc[group].bg_flags & EXT2_BG_BLOCK_UNINIT))
+ return;
+
+ blk = (group * fs->super->s_blocks_per_group) +
+ fs->super->s_first_data_block;
+
+ ext2fs_super_and_bgd_loc(fs, group, &super_blk,
+ &old_desc_blk, &new_desc_blk, 0);
+
+ if (fs->super->s_feature_incompat &
+ EXT2_FEATURE_INCOMPAT_META_BG)
+ old_desc_blocks = fs->super->s_first_meta_bg;
+ else
+ old_desc_blocks = fs->desc_blocks + fs->super->s_reserved_gdt_blocks;
+
+ for (i=0; i < fs->super->s_blocks_per_group; i++, blk++) {
+ if ((blk == super_blk) ||
+ (old_desc_blk && old_desc_blocks &&
+ (blk >= old_desc_blk) &&
+ (blk < old_desc_blk + old_desc_blocks)) ||
+ (new_desc_blk && (blk == new_desc_blk)) ||
+ (blk == fs->group_desc[group].bg_block_bitmap) ||
+ (blk == fs->group_desc[group].bg_inode_bitmap) ||
+ (blk >= fs->group_desc[group].bg_inode_table &&
+ (blk < fs->group_desc[group].bg_inode_table
+ + fs->inode_blocks_per_group)))
+ ext2fs_fast_mark_block_bitmap(map, blk);
+ else
+ ext2fs_fast_unmark_block_bitmap(map, blk);
+ }
+ fs->group_desc[group].bg_flags &= ~EXT2_BG_BLOCK_UNINIT;
+ ext2fs_group_desc_csum_set(fs, group);
+}
+
+/*
+ * Check for uninit inode bitmaps and deal with them appropriately
+ */
+static check_inode_uninit(ext2_filsys fs, ext2fs_inode_bitmap map,
+ dgrp_t group)
+{
+ int i;
+ ext2_ino_t ino;
+
+ if (!(EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) ||
+ !(fs->group_desc[group].bg_flags & EXT2_BG_INODE_UNINIT))
+ return;
+
+ ino = (group * fs->super->s_inodes_per_group) + 1;
+ for (i=0; i < fs->super->s_inodes_per_group; i++, ino++)
+ ext2fs_fast_unmark_inode_bitmap(map, ino);
+
+ fs->group_desc[group].bg_flags &= ~EXT2_BG_INODE_UNINIT;
+ check_block_uninit(fs, fs->block_map, group);
+}
+
+/*
* Right now, just search forward from the parent directory's block
* group to find the next free inode.
*
* Should have a special policy for directories.
*/
-errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode,
+errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir,
+ int mode EXT2FS_ATTR((unused)),
ext2fs_inode_bitmap map, ext2_ino_t *ret)
{
ext2_ino_t dir_group = 0;
i = start_inode;
do {
+ if (((i - 1) % EXT2_INODES_PER_GROUP(fs->super)) == 0)
+ check_inode_uninit(fs, map, (i - 1) /
+ EXT2_INODES_PER_GROUP(fs->super));
+
if (!ext2fs_fast_test_inode_bitmap(map, i))
break;
i++;
if (!goal || (goal >= fs->super->s_blocks_count))
goal = fs->super->s_first_data_block;
i = goal;
+ check_block_uninit(fs, map,
+ (i - fs->super->s_first_data_block) /
+ EXT2_BLOCKS_PER_GROUP(fs->super));
do {
+ if (((i - fs->super->s_first_data_block) %
+ EXT2_BLOCKS_PER_GROUP(fs->super)) == 0)
+ check_block_uninit(fs, map,
+ (i - fs->super->s_first_data_block) /
+ EXT2_BLOCKS_PER_GROUP(fs->super));
+
if (!ext2fs_fast_test_block_bitmap(map, i)) {
*ret = i;
return 0;
}
memset(block_buf, 0, fs->blocksize);
- if (!fs->block_map) {
- retval = ext2fs_read_block_bitmap(fs);
+ if (fs->get_alloc_block) {
+ blk64_t new;
+
+ retval = (fs->get_alloc_block)(fs, (blk64_t) goal, &new);
if (retval)
goto fail;
- }
+ block = (blk_t) new;
+ } else {
+ if (!fs->block_map) {
+ retval = ext2fs_read_block_bitmap(fs);
+ if (retval)
+ goto fail;
+ }
- retval = ext2fs_new_block(fs, goal, 0, &block);
- if (retval)
- goto fail;
+ retval = ext2fs_new_block(fs, goal, 0, &block);
+ if (retval)
+ goto fail;
+ }
retval = io_channel_write_blk(fs->io, block, 1, block_buf);
if (retval)
ext2fs_block_alloc_stats(fs, block, +1);
*ret = block;
- return 0;
fail:
if (buf)
return EXT2_ET_BLOCK_ALLOC_FAIL;
}
+void ext2fs_set_alloc_block_callback(ext2_filsys fs,
+ errcode_t (*func)(ext2_filsys fs,
+ blk64_t goal,
+ blk64_t *ret),
+ errcode_t (**old)(ext2_filsys fs,
+ blk64_t goal,
+ blk64_t *ret))
+{
+ if (!fs || fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS)
+ return;
+
+ if (old)
+ *old = fs->get_alloc_block;
+
+ fs->get_alloc_block = func;
+}