Theodore Ts'o wrote:
> The function ext4_mb_free_blocks() was using an "unsigned long" to
> pass a block number; this will cause 64-bit block numbers to get
> truncated on x86 and other 32-bit platforms.
>
> Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
Yup, good catch.
Reviewed-by: Eric Sandeen <sandeen@xxxxxxxxxx>
> ---
> fs/ext4/ext4.h | 2 +-
> fs/ext4/mballoc.c | 8 ++++----
> 2 files changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
> index 746cdcb..17b9998 100644
> --- a/fs/ext4/ext4.h
> +++ b/fs/ext4/ext4.h
> @@ -1341,7 +1341,7 @@ extern void ext4_discard_preallocations(struct inode *);
> extern int __init init_ext4_mballoc(void);
> extern void exit_ext4_mballoc(void);
> extern void ext4_mb_free_blocks(handle_t *, struct inode *,
> - unsigned long, unsigned long, int, unsigned long *);
> + ext4_fsblk_t, unsigned long, int, unsigned long *);
> extern int ext4_mb_add_groupinfo(struct super_block *sb,
> ext4_group_t i, struct ext4_group_desc *desc);
> extern void ext4_mb_update_group_info(struct ext4_group_info *grp,
> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
> index 8d98070..519a0a6 100644
> --- a/fs/ext4/mballoc.c
> +++ b/fs/ext4/mballoc.c
> @@ -4689,7 +4689,7 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
> * Main entry point into mballoc to free blocks
> */
> void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
> - unsigned long block, unsigned long count,
> + ext4_fsblk_t block, unsigned long count,
> int metadata, unsigned long *freed)
> {
> struct buffer_head *bitmap_bh = NULL;
> @@ -4715,11 +4715,11 @@ void ext4_mb_free_blocks(handle_t *handle, struct inode *inode,
> block + count > ext4_blocks_count(es)) {
> ext4_error(sb, __func__,
> "Freeing blocks not in datazone - "
> - "block = %lu, count = %lu", block, count);
> + "block = %llu, count = %lu", block, count);
> goto error_return;
> }
>
> - ext4_debug("freeing block %lu\n", block);
> + ext4_debug("freeing block %llu\n", block);
> trace_ext4_free_blocks(inode, block, count, metadata);
>
> ac = kmem_cache_alloc(ext4_ac_cachep, GFP_NOFS);
> @@ -4761,7 +4761,7 @@ do_more:
>
> ext4_error(sb, __func__,
> "Freeing blocks in system zone - "
> - "Block = %lu, count = %lu", block, count);
> + "Block = %llu, count = %lu", block, count);
> /* err = 0. ext4_std_error should be a no op */
> goto error_return;
> }
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