>> PAGE_CACHE_SHIFT;
}
-static unsigned int dir_buckets(unsigned int level)
+static unsigned int dir_buckets(unsigned int level, int dir_level)
{
- if (level < MAX_DIR_HASH_DEPTH / 2)
- return 1 << level;
+ if (level + dir_level < MAX_DIR_HASH_DEPTH / 2)
+ return 1 << (level + dir_level);
else
- return 1 << ((MAX_DIR_HASH_DEPTH / 2) - 1);
+ return MAX_DIR_BUCKETS;
}
static unsigned int bucket_blocks(unsigned int level)
de->file_type = f2fs_type_by_mode[(mode & S_IFMT) >> S_SHIFT];
}
-static unsigned long dir_block_index(unsigned int level, unsigned int idx)
+static unsigned long dir_block_index(unsigned int level,
+ int dir_level, unsigned int idx)
{
unsigned long i;
unsigned long bidx = 0;
for (i = 0; i < level; i++)
- bidx += dir_buckets(i) * bucket_blocks(i);
+ bidx += dir_buckets(i, dir_level) * bucket_blocks(i);
bidx += idx * bucket_blocks(level);
return bidx;
}
f2fs_hash_t namehash, struct page **res_page)
{
struct f2fs_dir_entry *de;
- unsigned long bit_pos, end_pos, next_pos;
+ unsigned long bit_pos = 0;
struct f2fs_dentry_block *dentry_blk = kmap(dentry_page);
- int slots;
+ const void *dentry_bits = &dentry_blk->dentry_bitmap;
+ int max_len = 0;
- bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
- NR_DENTRY_IN_BLOCK, 0);
while (bit_pos < NR_DENTRY_IN_BLOCK) {
+ if (!test_bit_le(bit_pos, dentry_bits)) {
+ if (bit_pos == 0)
+ max_len = 1;
+ else if (!test_bit_le(bit_pos - 1, dentry_bits))
+ max_len++;
+ bit_pos++;
+ continue;
+ }
de = &dentry_blk->dentry[bit_pos];
- 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],
name, namelen)) {
goto found;
}
}
- next_pos = bit_pos + slots;
- bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
- NR_DENTRY_IN_BLOCK, next_pos);
- if (bit_pos >= NR_DENTRY_IN_BLOCK)
- end_pos = NR_DENTRY_IN_BLOCK;
- else
- end_pos = bit_pos;
- if (*max_slots < end_pos - next_pos)
- *max_slots = end_pos - next_pos;
+ if (max_len > *max_slots) {
+ *max_slots = max_len;
+ max_len = 0;
+ }
+ bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
}
de = NULL;
kunmap(dentry_page);
found:
+ if (max_len > *max_slots)
+ *max_slots = max_len;
return de;
}
f2fs_bug_on(level > MAX_DIR_HASH_DEPTH);
- nbucket = dir_buckets(level);
+ nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level);
nblock = bucket_blocks(level);
- bidx = dir_block_index(level, le32_to_cpu(namehash) % nbucket);
+ bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level,
+ le32_to_cpu(namehash) % nbucket);
end_block = bidx + nblock;
for (; bidx < end_block; bidx++) {
struct page *page, struct inode *inode)
{
lock_page(page);
- wait_on_page_writeback(page);
+ f2fs_wait_on_page_writeback(page, DATA);
de->ino = cpu_to_le32(inode->i_ino);
set_de_type(de, inode);
kunmap(page);
{
struct f2fs_inode *ri;
+ f2fs_wait_on_page_writeback(ipage, NODE);
+
/* copy name info. to this inode page */
ri = F2FS_INODE(ipage);
ri->i_namelen = cpu_to_le32(name->len);
err = f2fs_init_security(inode, dir, name, page);
if (err)
goto put_error;
-
- wait_on_page_writeback(page);
} else {
page = get_node_page(F2FS_SB(dir->i_sb), inode->i_ino);
if (IS_ERR(page))
return page;
- wait_on_page_writeback(page);
set_cold_node(inode, page);
}
put_error:
f2fs_put_page(page, 1);
+ /* once the failed inode becomes a bad inode, i_mode is S_IFREG */
+ truncate_inode_pages(&inode->i_data, 0);
+ truncate_blocks(inode, 0);
+ remove_dirty_dir_inode(inode);
error:
remove_inode_page(inode);
return ERR_PTR(err);
set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
}
- if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR))
- update_inode_page(dir);
-
if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK))
clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
}
if (level == current_depth)
++current_depth;
- nbucket = dir_buckets(level);
+ nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level);
nblock = bucket_blocks(level);
- bidx = dir_block_index(level, (le32_to_cpu(dentry_hash) % nbucket));
+ bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level,
+ (le32_to_cpu(dentry_hash) % nbucket));
for (block = bidx; block <= (bidx + nblock - 1); block++) {
dentry_page = get_new_data_page(dir, NULL, block, true);
++level;
goto start;
add_dentry:
- wait_on_page_writeback(dentry_page);
+ f2fs_wait_on_page_writeback(dentry_page, DATA);
+ down_write(&F2FS_I(inode)->i_sem);
page = init_inode_metadata(inode, dir, name);
if (IS_ERR(page)) {
err = PTR_ERR(page);
update_parent_metadata(dir, inode, current_depth);
fail:
- clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
+ up_write(&F2FS_I(inode)->i_sem);
+
+ if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR)) {
+ update_inode_page(dir);
+ clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
+ }
kunmap(dentry_page);
f2fs_put_page(dentry_page, 1);
return err;
unsigned int bit_pos;
struct address_space *mapping = page->mapping;
struct inode *dir = mapping->host;
- struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
void *kaddr = page_address(page);
int i;
lock_page(page);
- wait_on_page_writeback(page);
+ f2fs_wait_on_page_writeback(page, DATA);
dentry_blk = (struct f2fs_dentry_block *)kaddr;
bit_pos = dentry - (struct f2fs_dir_entry *)dentry_blk->dentry;
dir->i_ctime = dir->i_mtime = CURRENT_TIME;
if (inode) {
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
+
+ down_write(&F2FS_I(inode)->i_sem);
+
if (S_ISDIR(inode->i_mode)) {
drop_nlink(dir);
update_inode_page(dir);
drop_nlink(inode);
i_size_write(inode, 0);
}
+ up_write(&F2FS_I(inode)->i_sem);
update_inode_page(inode);
if (inode->i_nlink == 0)
truncate_hole(dir, page->index, page->index + 1);
clear_page_dirty_for_io(page);
ClearPageUptodate(page);
- dec_page_count(sbi, F2FS_DIRTY_DENTS);
inode_dec_dirty_dents(dir);
}
f2fs_put_page(page, 1);
struct f2fs_dentry_block *dentry_blk = NULL;
struct f2fs_dir_entry *de = NULL;
struct page *dentry_page = NULL;
+ struct file_ra_state *ra = &file->f_ra;
unsigned int n = ((unsigned long)ctx->pos / NR_DENTRY_IN_BLOCK);
unsigned char d_type = DT_UNKNOWN;
bit_pos = ((unsigned long)ctx->pos % NR_DENTRY_IN_BLOCK);
+ /* readahead for multi pages of dir */
+ if (npages - n > 1 && !ra_has_index(ra, n))
+ page_cache_sync_readahead(inode->i_mapping, ra, file, n,
+ min(npages - n, (pgoff_t)MAX_DIR_RA_PAGES));
+
for (; n < npages; n++) {
dentry_page = get_lock_data_page(inode, n);
if (IS_ERR(dentry_page))
projects / karo-tx-linux.git / blobdiff