mirrors/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2025-11-04 02:30:34 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

btrfs: introduce BTRFS_MAX_ITEM_SIZE

Browse source 
We use BTRFS_LEAF_DATA_SIZE - sizeof(struct btrfs_item) in
several places.  This introduces a BTRFS_MAX_ITEM_SIZE macro to do the
same.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Jeff Mahoney 2016-06-15 10:25:38 -04:00 committed by David Sterba
parent 0c83b62e22
commit 14a1e067b4
4 changed files with 8 additions and 10 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

8
fs/btrfs/ctree.h
View file

@ -150,13 +150,13 @@ struct btrfs_header {
sizeof(struct btrfs_key_ptr)) sizeof(struct btrfs_key_ptr))
#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize)) #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
#define BTRFS_MAX_ITEM_SIZE(r) \
(BTRFS_LEAF_DATA_SIZE(r) - sizeof(struct btrfs_item))
#define BTRFS_FILE_EXTENT_INLINE_DATA_START \ #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
(offsetof(struct btrfs_file_extent_item, disk_bytenr)) (offsetof(struct btrfs_file_extent_item, disk_bytenr))
#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_MAX_ITEM_SIZE(r) - \
sizeof(struct btrfs_item) - \
BTRFS_FILE_EXTENT_INLINE_DATA_START) BTRFS_FILE_EXTENT_INLINE_DATA_START)
#define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_MAX_ITEM_SIZE(r) - \
sizeof(struct btrfs_item) -\
sizeof(struct btrfs_dir_item)) sizeof(struct btrfs_dir_item))

2
fs/btrfs/extent-tree.c
View file

@ -2779,7 +2779,7 @@ u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes)
u64 num_csums_per_leaf; u64 num_csums_per_leaf;
u64 num_csums; u64 num_csums;
csum_size = BTRFS_LEAF_DATA_SIZE(root) - sizeof(struct btrfs_item); csum_size = BTRFS_MAX_ITEM_SIZE(root);
num_csums_per_leaf = div64_u64(csum_size, num_csums_per_leaf = div64_u64(csum_size,
(u64)btrfs_super_csum_size(root->fs_info->super_copy)); (u64)btrfs_super_csum_size(root->fs_info->super_copy));
num_csums = div64_u64(csum_bytes, root->sectorsize); num_csums = div64_u64(csum_bytes, root->sectorsize);

5
fs/btrfs/file-item.c
View file

@ -27,9 +27,8 @@
#include "print-tree.h" #include "print-tree.h"
#include "compression.h" #include "compression.h"
#define __MAX_CSUM_ITEMS(r, size) ((unsigned long)(((BTRFS_LEAF_DATA_SIZE(r) - \ #define __MAX_CSUM_ITEMS(r, size) \
sizeof(struct btrfs_item) * 2) / \ ((unsigned long)(((BTRFS_MAX_ITEM_SIZE(r) * 2) / size) - 1))
size) - 1))
#define MAX_CSUM_ITEMS(r, size) (min_t(u32, __MAX_CSUM_ITEMS(r, size), \ #define MAX_CSUM_ITEMS(r, size) (min_t(u32, __MAX_CSUM_ITEMS(r, size), \
PAGE_SIZE)) PAGE_SIZE))

3
fs/btrfs/volumes.c
View file

@ -4573,8 +4573,7 @@ static void check_raid56_incompat_flag(struct btrfs_fs_info *info, u64 type)
btrfs_set_fs_incompat(info, RAID56); btrfs_set_fs_incompat(info, RAID56);
} }
#define BTRFS_MAX_DEVS(r) ((BTRFS_LEAF_DATA_SIZE(r) \ #define BTRFS_MAX_DEVS(r) ((BTRFS_MAX_ITEM_SIZE(r) \
- sizeof(struct btrfs_item) \
- sizeof(struct btrfs_chunk)) \ - sizeof(struct btrfs_chunk)) \
/ sizeof(struct btrfs_stripe) + 1) / sizeof(struct btrfs_stripe) + 1)