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linux/fs/btrfs
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Qu Wenruo fa485d21a7 btrfs: scrub: reduce width of extent_len/stripe_len from 64 to 32 bits 
Btrfs on-disk format chose to use u64 for almost everything, but there
are a other restrictions that won't let us use more than u32 for things
like extent length (the maximum length is 128MiB for non-hole extents),
or stripe length (we have device number limit).

This means if we don't have extra handling to convert u64 to u32, we
will always have some questionable operations like
"u32 = u64 >> sectorsize_bits" in the code.

This patch will try to address the problem by reducing the width for the
following members/parameters:

- scrub_parity::stripe_len
- @len of scrub_pages()
- @extent_len of scrub_remap_extent()
- @len of scrub_parity_mark_sectors_error()
- @len of scrub_parity_mark_sectors_data()
- @len of scrub_extent()
- @len of scrub_pages_for_parity()
- @len of scrub_extent_for_parity()

For members extracted from on-disk structure, like map->stripe_len, they
will be kept as is. Since that modification would require on-disk format
change.

There will be cases like "u32 = u64 - u64" or "u32 = u64", for such call
sites, extra ASSERT() is added to be extra safe for debug builds.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2020-12-09 19:16:11 +01:00
..
tests btrfs: remove recalc_thresholds from free space ops 2020-12-09 19:16:06 +01:00
acl.c
async-thread.c
async-thread.h
backref.c btrfs: pass root owner to read_tree_block 2020-12-08 15:54:07 +01:00
backref.h
block-group.c btrfs: skip space_cache v1 setup when not using it 2020-12-09 19:16:09 +01:00
block-group.h btrfs: load free space cache asynchronously 2020-12-08 15:54:03 +01:00
block-rsv.c btrfs: introduce mount option rescue=ignorebadroots 2020-12-08 15:53:41 +01:00
block-rsv.h
btrfs_inode.h btrfs: skip unnecessary searches for xattrs when logging an inode 2020-12-08 15:54:12 +01:00
check-integrity.c btrfs: drop casts of bio bi_sector 2020-12-09 19:16:05 +01:00
check-integrity.h
compression.c btrfs: refactor btrfs_lookup_bio_sums to handle out-of-order bvecs 2020-12-09 19:16:11 +01:00
compression.h btrfs: compression: move declarations to header 2020-10-07 12:06:55 +02:00
ctree.c btrfs: handle sectorsize < PAGE_SIZE case for extent buffer accessors 2020-12-09 19:16:10 +01:00
ctree.h btrfs: refactor btrfs_lookup_bio_sums to handle out-of-order bvecs 2020-12-09 19:16:11 +01:00
delalloc-space.c btrfs: add btrfs_reserve_data_bytes and use it 2020-10-07 12:06:52 +02:00
delalloc-space.h
delayed-inode.c btrfs: make btrfs_delayed_update_inode take btrfs_inode 2020-12-08 15:54:10 +01:00
delayed-inode.h btrfs: make btrfs_delayed_update_inode take btrfs_inode 2020-12-08 15:54:10 +01:00
delayed-ref.c
delayed-ref.h
dev-replace.c btrfs: check and enable ZONED mode 2020-12-09 19:16:03 +01:00
dev-replace.h
dir-item.c btrfs: locking: rip out path->leave_spinning 2020-12-08 15:54:02 +01:00
discard.c btrfs: don't miss async discards after scheduled work override 2020-12-08 15:54:05 +01:00
discard.h btrfs: cleanup btrfs_discard_update_discardable usage 2020-12-08 15:54:02 +01:00
disk-io.c btrfs: rename bio_offset of extent_submit_bio_start_t to dio_file_offset 2020-12-09 19:16:09 +01:00
disk-io.h btrfs: rename bio_offset of extent_submit_bio_start_t to dio_file_offset 2020-12-09 19:16:09 +01:00
export.c btrfs: locking: rip out path->leave_spinning 2020-12-08 15:54:02 +01:00
export.h
extent-io-tree.h btrfs: use fixed width int type for extent_state::state 2020-12-08 15:54:13 +01:00
extent-tree.c btrfs: set the lockdep class for extent buffers on creation 2020-12-08 15:54:07 +01:00
extent_io.c btrfs: handle sectorsize < PAGE_SIZE case for extent buffer accessors 2020-12-09 19:16:10 +01:00
extent_io.h btrfs: update num_extent_pages to support subpage sized extent buffer 2020-12-09 19:16:10 +01:00
extent_map.c
extent_map.h
file-item.c btrfs: refactor btrfs_lookup_bio_sums to handle out-of-order bvecs 2020-12-09 19:16:11 +01:00
file.c btrfs: disable fallocate in ZONED mode 2020-12-09 19:16:04 +01:00
free-space-cache.c btrfs: remove free space items when disabling space cache v1 2020-12-09 19:16:09 +01:00
free-space-cache.h btrfs: remove free space items when disabling space cache v1 2020-12-09 19:16:09 +01:00
free-space-tree.c btrfs: locking: rip out path->leave_spinning 2020-12-08 15:54:02 +01:00
free-space-tree.h
inode-item.c btrfs: locking: rip out path->leave_spinning 2020-12-08 15:54:02 +01:00
inode.c btrfs: refactor btrfs_lookup_bio_sums to handle out-of-order bvecs 2020-12-09 19:16:11 +01:00
ioctl.c btrfs: remove inode number cache feature 2020-12-09 19:16:05 +01:00
Kconfig btrfs: switch to iomap for direct IO 2020-10-07 12:06:57 +02:00
locking.c btrfs: remove the recurse parameter from __btrfs_tree_read_lock 2020-12-08 15:54:09 +01:00
locking.h btrfs: remove the recurse parameter from __btrfs_tree_read_lock 2020-12-08 15:54:09 +01:00
lzo.c
Makefile btrfs: remove inode number cache feature 2020-12-09 19:16:05 +01:00
misc.h
ordered-data.c btrfs: remove btrfs_find_ordered_sum call from btrfs_lookup_bio_sums 2020-12-09 19:16:10 +01:00
ordered-data.h btrfs: remove btrfs_find_ordered_sum call from btrfs_lookup_bio_sums 2020-12-09 19:16:10 +01:00
orphan.c
print-tree.c btrfs: pass root owner to read_tree_block 2020-12-08 15:54:07 +01:00
print-tree.h btrfs: pretty print leaked root name 2020-10-07 12:12:20 +02:00
props.c
props.h
qgroup.c btrfs: pass root owner to read_tree_block 2020-12-08 15:54:07 +01:00
qgroup.h btrfs: qgroup: export qgroups in sysfs 2020-07-27 12:55:37 +02:00
raid56.c btrfs: drop casts of bio bi_sector 2020-12-09 19:16:05 +01:00
raid56.h
rcu-string.h
reada.c btrfs: pass the owner_root and level to alloc_extent_buffer 2020-12-08 15:54:07 +01:00
ref-verify.c btrfs: use btrfs_read_node_slot in walk_down_tree 2020-12-08 15:54:06 +01:00
ref-verify.h
reflink.c btrfs: make btrfs_cont_expand take btrfs_inode 2020-12-08 15:54:12 +01:00
reflink.h
relocation.c btrfs: remove inode number cache feature 2020-12-09 19:16:05 +01:00
root-tree.c btrfs: qgroup: fix qgroup meta rsv leak for subvolume operations 2020-10-07 12:12:13 +02:00
scrub.c btrfs: scrub: reduce width of extent_len/stripe_len from 64 to 32 bits 2020-12-09 19:16:11 +01:00
send.c btrfs: send: use helpers to access root_item::ctransid 2020-12-08 15:53:51 +01:00
send.h btrfs: send: avoid copying file data 2020-10-07 12:13:17 +02:00
space-info.c btrfs: kill the RCU protection for fs_info->space_info 2020-10-07 12:13:19 +02:00
space-info.h btrfs: add btrfs_reserve_data_bytes and use it 2020-10-07 12:06:52 +02:00
struct-funcs.c btrfs: handle sectorsize < PAGE_SIZE case for extent buffer accessors 2020-12-09 19:16:10 +01:00
super.c btrfs: warn when remount will not change the free space tree 2020-12-09 19:16:08 +01:00
sysfs.c btrfs: introduce ZONED feature flag 2020-12-08 15:54:16 +01:00
sysfs.h btrfs: split and refactor btrfs_sysfs_remove_devices_dir 2020-10-07 12:12:21 +02:00
transaction.c btrfs: keep sb cache_generation consistent with space_cache 2020-12-09 19:16:08 +01:00
transaction.h btrfs: return bool from btrfs_should_end_transaction 2020-12-08 15:54:16 +01:00
tree-checker.c btrfs: tree-checker: annotate all error branches as unlikely 2020-12-08 15:54:15 +01:00
tree-checker.h
tree-defrag.c btrfs: locking: remove all the blocking helpers 2020-12-08 15:54:01 +01:00
tree-log.c btrfs: do not block inode logging for so long during transaction commit 2020-12-09 19:16:07 +01:00
tree-log.h btrfs: make fast fsyncs wait only for writeback 2020-10-07 12:06:56 +02:00
ulist.c
ulist.h
uuid-tree.c btrfs: remove unnecessary casts in printk 2020-12-08 15:53:52 +01:00
volumes.c btrfs: drop casts of bio bi_sector 2020-12-09 19:16:05 +01:00
volumes.h btrfs: get zone information of zoned block devices 2020-12-09 19:15:57 +01:00
xattr.c btrfs: skip unnecessary searches for xattrs when logging an inode 2020-12-08 15:54:12 +01:00
xattr.h
zlib.c
zoned.c btrfs: implement log-structured superblock for ZONED mode 2020-12-09 19:16:04 +01:00
zoned.h btrfs: implement log-structured superblock for ZONED mode 2020-12-09 19:16:04 +01:00
zstd.c