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f2fs: introduce macros to convert bytes and blocks in f2fs

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This patch adds two macros for transition between byte and block offsets.
Currently, f2fs only supports 4KB blocks, so use the default size for now.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-02-09 12:02:44 -08:00
parent da17eece03
commit f7ef9b83b5
4 changed files with 12 additions and 10 deletions
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7
fs/f2fs/checkpoint.c
View file

@ -981,15 +981,14 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
/* write out checkpoint buffer at block 0 */
cp_page = grab_meta_page(sbi, start_blk++);
kaddr = page_address(cp_page);
memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
memcpy(kaddr, ckpt, F2FS_BLKSIZE);
set_page_dirty(cp_page);
f2fs_put_page(cp_page, 1);
for (i = 1; i < 1 + cp_payload_blks; i++) {
cp_page = grab_meta_page(sbi, start_blk++);
kaddr = page_address(cp_page);
memcpy(kaddr, (char *)ckpt + i * F2FS_BLKSIZE,
(1 << sbi->log_blocksize));
memcpy(kaddr, (char *)ckpt + i * F2FS_BLKSIZE, F2FS_BLKSIZE);
set_page_dirty(cp_page);
f2fs_put_page(cp_page, 1);
}
@ -1009,7 +1008,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
/* writeout checkpoint block */
cp_page = grab_meta_page(sbi, start_blk);
kaddr = page_address(cp_page);
memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
memcpy(kaddr, ckpt, F2FS_BLKSIZE);
set_page_dirty(cp_page);
f2fs_put_page(cp_page, 1);

3
fs/f2fs/file.c
View file

@ -491,8 +491,7 @@ int truncate_blocks(struct inode *inode, u64 from, bool lock)
trace_f2fs_truncate_blocks_enter(inode, from);
free_from = (pgoff_t)
((from + blocksize - 1) >> (sbi->log_blocksize));
free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1);
if (lock)
f2fs_lock_op(sbi);

8
fs/f2fs/segment.c
View file

@ -1048,8 +1048,8 @@ static const struct segment_allocation default_salloc_ops = {
int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
{
__u64 start = range->start >> sbi->log_blocksize;
__u64 end = start + (range->len >> sbi->log_blocksize) - 1;
__u64 start = F2FS_BYTES_TO_BLK(range->start);
__u64 end = start + F2FS_BYTES_TO_BLK(range->len) - 1;
unsigned int start_segno, end_segno;
struct cp_control cpc;
@ -1066,7 +1066,7 @@ int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 :
GET_SEGNO(sbi, end);
cpc.reason = CP_DISCARD;
cpc.trim_minlen = range->minlen >> sbi->log_blocksize;
cpc.trim_minlen = F2FS_BYTES_TO_BLK(range->minlen);
/* do checkpoint to issue discard commands safely */
for (; start_segno <= end_segno; start_segno = cpc.trim_end + 1) {
@ -1080,7 +1080,7 @@ int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
mutex_unlock(&sbi->gc_mutex);
}
out:
range->len = cpc.trimmed << sbi->log_blocksize;
range->len = F2FS_BLK_TO_BYTES(cpc.trimmed);
return 0;
}

4
include/linux/f2fs_fs.h
View file

@ -19,12 +19,16 @@
#define F2FS_MAX_LOG_SECTOR_SIZE 12 /* 12 bits for 4096 bytes */
#define F2FS_LOG_SECTORS_PER_BLOCK 3 /* log number for sector/blk */
#define F2FS_BLKSIZE 4096 /* support only 4KB block */
#define F2FS_BLKSIZE_BITS 12 /* bits for F2FS_BLKSIZE */
#define F2FS_MAX_EXTENSION 64 /* # of extension entries */
#define F2FS_BLK_ALIGN(x) (((x) + F2FS_BLKSIZE - 1) / F2FS_BLKSIZE)
#define NULL_ADDR ((block_t)0) /* used as block_t addresses */
#define NEW_ADDR ((block_t)-1) /* used as block_t addresses */
#define F2FS_BYTES_TO_BLK(bytes) ((bytes) >> F2FS_BLKSIZE_BITS)
#define F2FS_BLK_TO_BYTES(blk) ((blk) << F2FS_BLKSIZE_BITS)
/* 0, 1(node nid), 2(meta nid) are reserved node id */
#define F2FS_RESERVED_NODE_NUM 3