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f2fs: make max inline size changeable

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This patch tries to make below macros calculating max inline size,
inline dentry field size considerring reserving size-changeable
space:
- MAX_INLINE_DATA
- NR_INLINE_DENTRY
- INLINE_DENTRY_BITMAP_SIZE
- INLINE_RESERVED_SIZE

Then, when inline_{data,dentry} options is enabled, it allows us to
reserve inline space with different size flexibly for adding newly
introduced inode attribute.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2017-07-19 00:19:05 +08:00 • committed by Jaegeuk Kim
parent e65ef20781
commit f247037120
6 changed files with 96 additions and 81 deletions
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23
include/linux/f2fs_fs.h
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@ -206,9 +206,6 @@ struct f2fs_extent {
#define F2FS_DATA_EXIST 0x08 /* file inline data exist flag */
#define F2FS_INLINE_DOTS 0x10 /* file having implicit dot dentries */
#define MAX_INLINE_DATA (sizeof(__le32) * (DEF_ADDRS_PER_INODE - \
F2FS_INLINE_XATTR_ADDRS - 1))
struct f2fs_inode {
__le16 i_mode; /* file mode */
__u8 i_advise; /* file hints */
@ -465,7 +462,7 @@ typedef __le32 f2fs_hash_t;
#define MAX_DIR_BUCKETS (1 << ((MAX_DIR_HASH_DEPTH / 2) - 1))
/*
* space utilization of regular dentry and inline dentry
* space utilization of regular dentry and inline dentry (w/o extra reservation)
* regular dentry inline dentry
* bitmap 1 * 27 = 27 1 * 23 = 23
* reserved 1 * 3 = 3 1 * 7 = 7
@ -501,24 +498,6 @@ struct f2fs_dentry_block {
__u8 filename[NR_DENTRY_IN_BLOCK][F2FS_SLOT_LEN];
} __packed;
/* for inline dir */
#define NR_INLINE_DENTRY (MAX_INLINE_DATA * BITS_PER_BYTE / \
((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
BITS_PER_BYTE + 1))
#define INLINE_DENTRY_BITMAP_SIZE ((NR_INLINE_DENTRY + \
BITS_PER_BYTE - 1) / BITS_PER_BYTE)
#define INLINE_RESERVED_SIZE (MAX_INLINE_DATA - \
((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
NR_INLINE_DENTRY + INLINE_DENTRY_BITMAP_SIZE))
/* inline directory entry structure */
struct f2fs_inline_dentry {
__u8 dentry_bitmap[INLINE_DENTRY_BITMAP_SIZE];
__u8 reserved[INLINE_RESERVED_SIZE];
struct f2fs_dir_entry dentry[NR_INLINE_DENTRY];
__u8 filename[NR_INLINE_DENTRY][F2FS_SLOT_LEN];
} __packed;
/* file types used in inode_info->flags */
enum {
F2FS_FT_UNKNOWN,