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f2fs: introduce accessor to retrieve number of dentry slots 

Simplify code by providing the accessor macro to retrieve the
number of dentry slots for a given filename length.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
This commit is contained in:
Namjae Jeon 2012-12-08 14:54:50 +09:00 committed by Jaegeuk Kim
parent 508198be3c
commit 457d08ee4f
2 changed files with 8 additions and 8 deletions
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13
fs/f2fs/dir.c
View File

@ -99,8 +99,7 @@ static struct f2fs_dir_entry *find_in_block(struct page *dentry_page,
NR_DENTRY_IN_BLOCK, 0);
while (bit_pos < NR_DENTRY_IN_BLOCK) {
de = &dentry_blk->dentry[bit_pos];
slots = (le16_to_cpu(de->name_len) + F2FS_NAME_LEN - 1) /
F2FS_NAME_LEN;
slots = GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
if (early_match_name(name, namelen, namehash, de)) {
if (!memcmp(dentry_blk->filename[bit_pos],
@ -130,7 +129,7 @@ static struct f2fs_dir_entry *find_in_level(struct inode *dir,
unsigned int level, const char *name, int namelen,
f2fs_hash_t namehash, struct page **res_page)
{
int s = (namelen + F2FS_NAME_LEN - 1) / F2FS_NAME_LEN;
int s = GET_DENTRY_SLOTS(namelen);
unsigned int nbucket, nblock;
unsigned int bidx, end_block;
struct page *dentry_page;
@ -383,7 +382,7 @@ int f2fs_add_link(struct dentry *dentry, struct inode *inode)
int namelen = dentry->d_name.len;
struct page *dentry_page = NULL;
struct f2fs_dentry_block *dentry_blk = NULL;
int slots = (namelen + F2FS_NAME_LEN - 1) / F2FS_NAME_LEN;
int slots = GET_DENTRY_SLOTS(namelen);
int err = 0;
int i;
@ -465,8 +464,7 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
struct address_space *mapping = page->mapping;
struct inode *dir = mapping->host;
struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
int slots = (le16_to_cpu(dentry->name_len) + F2FS_NAME_LEN - 1) /
F2FS_NAME_LEN;
int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
void *kaddr = page_address(page);
int i;
@ -641,8 +639,7 @@ static int f2fs_readdir(struct file *file, void *dirent, filldir_t filldir)
file->f_pos += bit_pos - start_bit_pos;
goto success;
}
slots = (le16_to_cpu(de->name_len) + F2FS_NAME_LEN - 1)
/ F2FS_NAME_LEN;
slots = GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
bit_pos += slots;
}
bit_pos = 0;

3
include/linux/f2fs_fs.h
View File

@ -363,6 +363,9 @@ typedef __le32 f2fs_hash_t;
/* One directory entry slot covers 8bytes-long file name */
#define F2FS_NAME_LEN 8
#define F2FS_NAME_LEN_BITS 3
#define GET_DENTRY_SLOTS(x) ((x + F2FS_NAME_LEN - 1) >> F2FS_NAME_LEN_BITS)
/* the number of dentry in a block */
#define NR_DENTRY_IN_BLOCK 214