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| author | Namjae Jeon <namjae.jeon@samsung.com> | 2013-04-29 16:21:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-29 18:28:40 -0700 |
| commit | e22a444275d1e7c80db5d8bec08fb8d0d79617ad (patch) | |
| tree | b69291b4b24a733f6d5ec6178e1cc9059e5dc5bf /fs/fat/inode.c | |
| parent | f21735d5873ad6c0d71fc15ebbbeda9ef445009b (diff) | |
| download | linux-e22a444275d1e7c80db5d8bec08fb8d0d79617ad.tar.gz | |
fat: introduce a helper fat_get_blknr_offset()
Introduce helper function to get the block number and offset for a given i_pos value. Use it in __fat_write_inode() now and later on in nfs.c Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ravishankar N <ravi.n1@samsung.com> Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fat/inode.c')
| -rw-r--r-- | fs/fat/inode.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/fat/inode.c b/fs/fat/inode.c index 78e363c844cb..68cb5a6eb539 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -662,7 +662,8 @@ static int __fat_write_inode(struct inode *inode, int wait) struct buffer_head *bh; struct msdos_dir_entry *raw_entry; loff_t i_pos; - int err; + sector_t blocknr; + int err, offset; if (inode->i_ino == MSDOS_ROOT_INO) return 0; @@ -672,7 +673,8 @@ retry: if (!i_pos) return 0; - bh = sb_bread(sb, i_pos >> sbi->dir_per_block_bits); + fat_get_blknr_offset(sbi, i_pos, &blocknr, &offset); + bh = sb_bread(sb, blocknr); if (!bh) { fat_msg(sb, KERN_ERR, "unable to read inode block " "for updating (i_pos %lld)", i_pos); @@ -685,8 +687,7 @@ retry: goto retry; } - raw_entry = &((struct msdos_dir_entry *) (bh->b_data)) - [i_pos & (sbi->dir_per_block - 1)]; + raw_entry = &((struct msdos_dir_entry *) (bh->b_data))[offset]; if (S_ISDIR(inode->i_mode)) raw_entry->size = 0; else |