libext2fs: Add callback functions for _alloc_block() and _block_alloc_stats()
Add callback functions for ext2fs_alloc_block() and
ext2fs_block_alloc_stats(). This is needed so e2fsck can be informed
when the extent_set_bmap() function needs to allocate or deallocate
blocks.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/lib/ext2fs/alloc_stats.c b/lib/ext2fs/alloc_stats.c
index 3956528..a8514cc 100644
--- a/lib/ext2fs/alloc_stats.c
+++ b/lib/ext2fs/alloc_stats.c
@@ -69,4 +69,22 @@
fs->super->s_free_blocks_count -= inuse;
ext2fs_mark_super_dirty(fs);
ext2fs_mark_bb_dirty(fs);
+ if (fs->block_alloc_stats)
+ (fs->block_alloc_stats)(fs, (blk64_t) blk, inuse);
+}
+
+void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs,
+ void (*func)(ext2_filsys fs,
+ blk64_t blk,
+ int inuse),
+ void (**old)(ext2_filsys fs,
+ blk64_t blk,
+ int inuse))
+{
+ if (!fs || fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS)
+ return;
+ if (old)
+ *old = fs->block_alloc_stats;
+
+ fs->block_alloc_stats = func;
}