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f2fs: reuse room_for_filename for inline dentry operation 

This patch introduces to reuse the existing room_for_filename for inline dentry
operation.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
hifive-unleashed-5.1
Jaegeuk Kim 2014-10-13 16:28:13 -07:00
parent d37a868ffc
commit a82afa2019
3 changed files with 12 additions and 37 deletions
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21
fs/f2fs/dir.c
View File

@ -427,27 +427,23 @@ void update_parent_metadata(struct inode *dir, struct inode *inode,
clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
}
static int room_for_filename(struct f2fs_dentry_block *dentry_blk, int slots)
int room_for_filename(const void *bitmap, int slots, int max_slots)
{
int bit_start = 0;
int zero_start, zero_end;
next:
zero_start = find_next_zero_bit_le(&dentry_blk->dentry_bitmap,
NR_DENTRY_IN_BLOCK,
bit_start);
if (zero_start >= NR_DENTRY_IN_BLOCK)
return NR_DENTRY_IN_BLOCK;
zero_start = find_next_zero_bit_le(bitmap, max_slots, bit_start);
if (zero_start >= max_slots)
return max_slots;
zero_end = find_next_bit_le(&dentry_blk->dentry_bitmap,
NR_DENTRY_IN_BLOCK,
zero_start);
zero_end = find_next_bit_le(bitmap, max_slots, zero_start);
if (zero_end - zero_start >= slots)
return zero_start;
bit_start = zero_end + 1;
if (zero_end + 1 >= NR_DENTRY_IN_BLOCK)
return NR_DENTRY_IN_BLOCK;
if (zero_end + 1 >= max_slots)
return max_slots;
goto next;
}
@ -509,7 +505,8 @@ start:
return PTR_ERR(dentry_page);
dentry_blk = kmap(dentry_page);
bit_pos = room_for_filename(dentry_blk, slots);
bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
slots, NR_DENTRY_IN_BLOCK);
if (bit_pos < NR_DENTRY_IN_BLOCK)
goto add_dentry;

1
fs/f2fs/f2fs.h
View File

@ -1248,6 +1248,7 @@ void set_de_type(struct f2fs_dir_entry *, struct inode *);
struct page *init_inode_metadata(struct inode *, struct inode *,
const struct qstr *);
void update_parent_metadata(struct inode *, struct inode *, unsigned int);
int room_for_filename(const void *, int, int);
void f2fs_drop_nlink(struct inode *, struct inode *, struct page *);
struct f2fs_dir_entry *f2fs_find_entry(struct inode *, struct qstr *,
struct page **);

27
fs/f2fs/inline.c
View File

@ -363,30 +363,6 @@ int make_empty_inline_dir(struct inode *inode, struct inode *parent,
return 0;
}
int room_in_inline_dir(struct f2fs_inline_dentry *dentry_blk, int slots)
{
int bit_start = 0;
int zero_start, zero_end;
next:
zero_start = find_next_zero_bit_le(&dentry_blk->dentry_bitmap,
NR_INLINE_DENTRY,
bit_start);
if (zero_start >= NR_INLINE_DENTRY)
return NR_INLINE_DENTRY;
zero_end = find_next_bit_le(&dentry_blk->dentry_bitmap,
NR_INLINE_DENTRY,
zero_start);
if (zero_end - zero_start >= slots)
return zero_start;
bit_start = zero_end + 1;
if (zero_end + 1 >= NR_INLINE_DENTRY)
return NR_INLINE_DENTRY;
goto next;
}
int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
struct f2fs_inline_dentry *inline_dentry)
{
@ -460,7 +436,8 @@ int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name,
return PTR_ERR(ipage);
dentry_blk = inline_data_addr(ipage);
bit_pos = room_in_inline_dir(dentry_blk, slots);
bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
slots, NR_INLINE_DENTRY);
if (bit_pos >= NR_INLINE_DENTRY) {
err = f2fs_convert_inline_dir(dir, ipage, dentry_blk);
if (!err)