| /* |
| * fs/f2fs/dir.c |
| * |
| * Copyright (c) 2012 Samsung Electronics Co., Ltd. |
| * http://www.samsung.com/ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #include <linux/fs.h> |
| #include <linux/f2fs_fs.h> |
| #include "f2fs.h" |
| #include "node.h" |
| #include "acl.h" |
| |
| static unsigned long dir_blocks(struct inode *inode) |
| { |
| return ((unsigned long long) (i_size_read(inode) + PAGE_CACHE_SIZE - 1)) |
| >> PAGE_CACHE_SHIFT; |
| } |
| |
| static unsigned int dir_buckets(unsigned int level) |
| { |
| if (level < MAX_DIR_HASH_DEPTH / 2) |
| return 1 << level; |
| else |
| return 1 << ((MAX_DIR_HASH_DEPTH / 2) - 1); |
| } |
| |
| static unsigned int bucket_blocks(unsigned int level) |
| { |
| if (level < MAX_DIR_HASH_DEPTH / 2) |
| return 2; |
| else |
| return 4; |
| } |
| |
| static unsigned char f2fs_filetype_table[F2FS_FT_MAX] = { |
| [F2FS_FT_UNKNOWN] = DT_UNKNOWN, |
| [F2FS_FT_REG_FILE] = DT_REG, |
| [F2FS_FT_DIR] = DT_DIR, |
| [F2FS_FT_CHRDEV] = DT_CHR, |
| [F2FS_FT_BLKDEV] = DT_BLK, |
| [F2FS_FT_FIFO] = DT_FIFO, |
| [F2FS_FT_SOCK] = DT_SOCK, |
| [F2FS_FT_SYMLINK] = DT_LNK, |
| }; |
| |
| #define S_SHIFT 12 |
| static unsigned char f2fs_type_by_mode[S_IFMT >> S_SHIFT] = { |
| [S_IFREG >> S_SHIFT] = F2FS_FT_REG_FILE, |
| [S_IFDIR >> S_SHIFT] = F2FS_FT_DIR, |
| [S_IFCHR >> S_SHIFT] = F2FS_FT_CHRDEV, |
| [S_IFBLK >> S_SHIFT] = F2FS_FT_BLKDEV, |
| [S_IFIFO >> S_SHIFT] = F2FS_FT_FIFO, |
| [S_IFSOCK >> S_SHIFT] = F2FS_FT_SOCK, |
| [S_IFLNK >> S_SHIFT] = F2FS_FT_SYMLINK, |
| }; |
| |
| static void set_de_type(struct f2fs_dir_entry *de, struct inode *inode) |
| { |
| mode_t mode = inode->i_mode; |
| de->file_type = f2fs_type_by_mode[(mode & S_IFMT) >> S_SHIFT]; |
| } |
| |
| static unsigned long dir_block_index(unsigned int 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 += idx * bucket_blocks(level); |
| return bidx; |
| } |
| |
| static bool early_match_name(const char *name, size_t namelen, |
| f2fs_hash_t namehash, struct f2fs_dir_entry *de) |
| { |
| if (le16_to_cpu(de->name_len) != namelen) |
| return false; |
| |
| if (de->hash_code != namehash) |
| return false; |
| |
| return true; |
| } |
| |
| static struct f2fs_dir_entry *find_in_block(struct page *dentry_page, |
| const char *name, size_t namelen, int *max_slots, |
| f2fs_hash_t namehash, struct page **res_page) |
| { |
| struct f2fs_dir_entry *de; |
| unsigned long bit_pos, end_pos, next_pos; |
| struct f2fs_dentry_block *dentry_blk = kmap(dentry_page); |
| int slots; |
| |
| bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, |
| NR_DENTRY_IN_BLOCK, 0); |
| while (bit_pos < NR_DENTRY_IN_BLOCK) { |
| 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)) { |
| *res_page = dentry_page; |
| 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; |
| } |
| |
| de = NULL; |
| kunmap(dentry_page); |
| found: |
| return de; |
| } |
| |
| static struct f2fs_dir_entry *find_in_level(struct inode *dir, |
| unsigned int level, const char *name, size_t namelen, |
| f2fs_hash_t namehash, struct page **res_page) |
| { |
| int s = GET_DENTRY_SLOTS(namelen); |
| unsigned int nbucket, nblock; |
| unsigned int bidx, end_block; |
| struct page *dentry_page; |
| struct f2fs_dir_entry *de = NULL; |
| bool room = false; |
| int max_slots = 0; |
| |
| BUG_ON(level > MAX_DIR_HASH_DEPTH); |
| |
| nbucket = dir_buckets(level); |
| nblock = bucket_blocks(level); |
| |
| bidx = dir_block_index(level, le32_to_cpu(namehash) % nbucket); |
| end_block = bidx + nblock; |
| |
| for (; bidx < end_block; bidx++) { |
| /* no need to allocate new dentry pages to all the indices */ |
| dentry_page = find_data_page(dir, bidx); |
| if (IS_ERR(dentry_page)) { |
| room = true; |
| continue; |
| } |
| |
| de = find_in_block(dentry_page, name, namelen, |
| &max_slots, namehash, res_page); |
| if (de) |
| break; |
| |
| if (max_slots >= s) |
| room = true; |
| f2fs_put_page(dentry_page, 0); |
| } |
| |
| if (!de && room && F2FS_I(dir)->chash != namehash) { |
| F2FS_I(dir)->chash = namehash; |
| F2FS_I(dir)->clevel = level; |
| } |
| |
| return de; |
| } |
| |
| /* |
| * Find an entry in the specified directory with the wanted name. |
| * It returns the page where the entry was found (as a parameter - res_page), |
| * and the entry itself. Page is returned mapped and unlocked. |
| * Entry is guaranteed to be valid. |
| */ |
| struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir, |
| struct qstr *child, struct page **res_page) |
| { |
| const char *name = child->name; |
| size_t namelen = child->len; |
| unsigned long npages = dir_blocks(dir); |
| struct f2fs_dir_entry *de = NULL; |
| f2fs_hash_t name_hash; |
| unsigned int max_depth; |
| unsigned int level; |
| |
| if (npages == 0) |
| return NULL; |
| |
| *res_page = NULL; |
| |
| name_hash = f2fs_dentry_hash(name, namelen); |
| max_depth = F2FS_I(dir)->i_current_depth; |
| |
| for (level = 0; level < max_depth; level++) { |
| de = find_in_level(dir, level, name, |
| namelen, name_hash, res_page); |
| if (de) |
| break; |
| } |
| if (!de && F2FS_I(dir)->chash != name_hash) { |
| F2FS_I(dir)->chash = name_hash; |
| F2FS_I(dir)->clevel = level - 1; |
| } |
| return de; |
| } |
| |
| struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p) |
| { |
| struct page *page = NULL; |
| struct f2fs_dir_entry *de = NULL; |
| struct f2fs_dentry_block *dentry_blk = NULL; |
| |
| page = get_lock_data_page(dir, 0); |
| if (IS_ERR(page)) |
| return NULL; |
| |
| dentry_blk = kmap(page); |
| de = &dentry_blk->dentry[1]; |
| *p = page; |
| unlock_page(page); |
| return de; |
| } |
| |
| ino_t f2fs_inode_by_name(struct inode *dir, struct qstr *qstr) |
| { |
| ino_t res = 0; |
| struct f2fs_dir_entry *de; |
| struct page *page; |
| |
| de = f2fs_find_entry(dir, qstr, &page); |
| if (de) { |
| res = le32_to_cpu(de->ino); |
| kunmap(page); |
| f2fs_put_page(page, 0); |
| } |
| |
| return res; |
| } |
| |
| void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de, |
| struct page *page, struct inode *inode) |
| { |
| struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); |
| |
| mutex_lock_op(sbi, DENTRY_OPS); |
| lock_page(page); |
| wait_on_page_writeback(page); |
| de->ino = cpu_to_le32(inode->i_ino); |
| set_de_type(de, inode); |
| kunmap(page); |
| set_page_dirty(page); |
| dir->i_mtime = dir->i_ctime = CURRENT_TIME; |
| mark_inode_dirty(dir); |
| |
| /* update parent inode number before releasing dentry page */ |
| F2FS_I(inode)->i_pino = dir->i_ino; |
| |
| f2fs_put_page(page, 1); |
| mutex_unlock_op(sbi, DENTRY_OPS); |
| } |
| |
| void init_dent_inode(struct dentry *dentry, struct page *ipage) |
| { |
| struct f2fs_node *rn; |
| |
| if (IS_ERR(ipage)) |
| return; |
| |
| wait_on_page_writeback(ipage); |
| |
| /* copy dentry info. to this inode page */ |
| rn = (struct f2fs_node *)page_address(ipage); |
| rn->i.i_namelen = cpu_to_le32(dentry->d_name.len); |
| memcpy(rn->i.i_name, dentry->d_name.name, dentry->d_name.len); |
| set_page_dirty(ipage); |
| } |
| |
| static int init_inode_metadata(struct inode *inode, struct dentry *dentry) |
| { |
| struct inode *dir = dentry->d_parent->d_inode; |
| |
| if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) { |
| int err; |
| err = new_inode_page(inode, dentry); |
| if (err) |
| return err; |
| |
| if (S_ISDIR(inode->i_mode)) { |
| err = f2fs_make_empty(inode, dir); |
| if (err) { |
| remove_inode_page(inode); |
| return err; |
| } |
| } |
| |
| err = f2fs_init_acl(inode, dir); |
| if (err) { |
| remove_inode_page(inode); |
| return err; |
| } |
| } else { |
| struct page *ipage; |
| ipage = get_node_page(F2FS_SB(dir->i_sb), inode->i_ino); |
| if (IS_ERR(ipage)) |
| return PTR_ERR(ipage); |
| set_cold_node(inode, ipage); |
| init_dent_inode(dentry, ipage); |
| f2fs_put_page(ipage, 1); |
| } |
| if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK)) { |
| inc_nlink(inode); |
| f2fs_write_inode(inode, NULL); |
| } |
| return 0; |
| } |
| |
| static void update_parent_metadata(struct inode *dir, struct inode *inode, |
| unsigned int current_depth) |
| { |
| bool need_dir_update = false; |
| |
| if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) { |
| if (S_ISDIR(inode->i_mode)) { |
| inc_nlink(dir); |
| need_dir_update = true; |
| } |
| clear_inode_flag(F2FS_I(inode), FI_NEW_INODE); |
| } |
| dir->i_mtime = dir->i_ctime = CURRENT_TIME; |
| if (F2FS_I(dir)->i_current_depth != current_depth) { |
| F2FS_I(dir)->i_current_depth = current_depth; |
| need_dir_update = true; |
| } |
| |
| if (need_dir_update) |
| f2fs_write_inode(dir, NULL); |
| else |
| mark_inode_dirty(dir); |
| |
| if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK)) |
| clear_inode_flag(F2FS_I(inode), FI_INC_LINK); |
| } |
| |
| static int room_for_filename(struct f2fs_dentry_block *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_DENTRY_IN_BLOCK, |
| bit_start); |
| if (zero_start >= NR_DENTRY_IN_BLOCK) |
| return NR_DENTRY_IN_BLOCK; |
| |
| zero_end = find_next_bit_le(&dentry_blk->dentry_bitmap, |
| NR_DENTRY_IN_BLOCK, |
| 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; |
| goto next; |
| } |
| |
| int f2fs_add_link(struct dentry *dentry, struct inode *inode) |
| { |
| unsigned int bit_pos; |
| unsigned int level; |
| unsigned int current_depth; |
| unsigned long bidx, block; |
| f2fs_hash_t dentry_hash; |
| struct f2fs_dir_entry *de; |
| unsigned int nbucket, nblock; |
| struct inode *dir = dentry->d_parent->d_inode; |
| struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); |
| const char *name = dentry->d_name.name; |
| size_t namelen = dentry->d_name.len; |
| struct page *dentry_page = NULL; |
| struct f2fs_dentry_block *dentry_blk = NULL; |
| int slots = GET_DENTRY_SLOTS(namelen); |
| int err = 0; |
| int i; |
| |
| dentry_hash = f2fs_dentry_hash(name, dentry->d_name.len); |
| level = 0; |
| current_depth = F2FS_I(dir)->i_current_depth; |
| if (F2FS_I(dir)->chash == dentry_hash) { |
| level = F2FS_I(dir)->clevel; |
| F2FS_I(dir)->chash = 0; |
| } |
| |
| start: |
| if (current_depth == MAX_DIR_HASH_DEPTH) |
| return -ENOSPC; |
| |
| /* Increase the depth, if required */ |
| if (level == current_depth) |
| ++current_depth; |
| |
| nbucket = dir_buckets(level); |
| nblock = bucket_blocks(level); |
| |
| bidx = dir_block_index(level, (le32_to_cpu(dentry_hash) % nbucket)); |
| |
| for (block = bidx; block <= (bidx + nblock - 1); block++) { |
| mutex_lock_op(sbi, DENTRY_OPS); |
| dentry_page = get_new_data_page(dir, block, true); |
| if (IS_ERR(dentry_page)) { |
| mutex_unlock_op(sbi, DENTRY_OPS); |
| return PTR_ERR(dentry_page); |
| } |
| |
| dentry_blk = kmap(dentry_page); |
| bit_pos = room_for_filename(dentry_blk, slots); |
| if (bit_pos < NR_DENTRY_IN_BLOCK) |
| goto add_dentry; |
| |
| kunmap(dentry_page); |
| f2fs_put_page(dentry_page, 1); |
| mutex_unlock_op(sbi, DENTRY_OPS); |
| } |
| |
| /* Move to next level to find the empty slot for new dentry */ |
| ++level; |
| goto start; |
| add_dentry: |
| err = init_inode_metadata(inode, dentry); |
| if (err) |
| goto fail; |
| |
| wait_on_page_writeback(dentry_page); |
| |
| de = &dentry_blk->dentry[bit_pos]; |
| de->hash_code = dentry_hash; |
| de->name_len = cpu_to_le16(namelen); |
| memcpy(dentry_blk->filename[bit_pos], name, namelen); |
| de->ino = cpu_to_le32(inode->i_ino); |
| set_de_type(de, inode); |
| for (i = 0; i < slots; i++) |
| test_and_set_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap); |
| set_page_dirty(dentry_page); |
| |
| update_parent_metadata(dir, inode, current_depth); |
| |
| /* update parent inode number before releasing dentry page */ |
| F2FS_I(inode)->i_pino = dir->i_ino; |
| fail: |
| kunmap(dentry_page); |
| f2fs_put_page(dentry_page, 1); |
| mutex_unlock_op(sbi, DENTRY_OPS); |
| return err; |
| } |
| |
| /* |
| * It only removes the dentry from the dentry page,corresponding name |
| * entry in name page does not need to be touched during deletion. |
| */ |
| void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page, |
| struct inode *inode) |
| { |
| struct f2fs_dentry_block *dentry_blk; |
| 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; |
| |
| mutex_lock_op(sbi, DENTRY_OPS); |
| |
| lock_page(page); |
| wait_on_page_writeback(page); |
| |
| dentry_blk = (struct f2fs_dentry_block *)kaddr; |
| bit_pos = dentry - (struct f2fs_dir_entry *)dentry_blk->dentry; |
| for (i = 0; i < slots; i++) |
| test_and_clear_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap); |
| |
| /* Let's check and deallocate this dentry page */ |
| bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, |
| NR_DENTRY_IN_BLOCK, |
| 0); |
| kunmap(page); /* kunmap - pair of f2fs_find_entry */ |
| set_page_dirty(page); |
| |
| dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
| |
| if (inode && S_ISDIR(inode->i_mode)) { |
| drop_nlink(dir); |
| f2fs_write_inode(dir, NULL); |
| } else { |
| mark_inode_dirty(dir); |
| } |
| |
| if (inode) { |
| inode->i_ctime = CURRENT_TIME; |
| drop_nlink(inode); |
| if (S_ISDIR(inode->i_mode)) { |
| drop_nlink(inode); |
| i_size_write(inode, 0); |
| } |
| f2fs_write_inode(inode, NULL); |
| if (inode->i_nlink == 0) |
| add_orphan_inode(sbi, inode->i_ino); |
| } |
| |
| if (bit_pos == NR_DENTRY_IN_BLOCK) { |
| 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); |
| |
| mutex_unlock_op(sbi, DENTRY_OPS); |
| } |
| |
| int f2fs_make_empty(struct inode *inode, struct inode *parent) |
| { |
| struct page *dentry_page; |
| struct f2fs_dentry_block *dentry_blk; |
| struct f2fs_dir_entry *de; |
| void *kaddr; |
| |
| dentry_page = get_new_data_page(inode, 0, true); |
| if (IS_ERR(dentry_page)) |
| return PTR_ERR(dentry_page); |
| |
| kaddr = kmap_atomic(dentry_page); |
| dentry_blk = (struct f2fs_dentry_block *)kaddr; |
| |
| de = &dentry_blk->dentry[0]; |
| de->name_len = cpu_to_le16(1); |
| de->hash_code = f2fs_dentry_hash(".", 1); |
| de->ino = cpu_to_le32(inode->i_ino); |
| memcpy(dentry_blk->filename[0], ".", 1); |
| set_de_type(de, inode); |
| |
| de = &dentry_blk->dentry[1]; |
| de->hash_code = f2fs_dentry_hash("..", 2); |
| de->name_len = cpu_to_le16(2); |
| de->ino = cpu_to_le32(parent->i_ino); |
| memcpy(dentry_blk->filename[1], "..", 2); |
| set_de_type(de, inode); |
| |
| test_and_set_bit_le(0, &dentry_blk->dentry_bitmap); |
| test_and_set_bit_le(1, &dentry_blk->dentry_bitmap); |
| kunmap_atomic(kaddr); |
| |
| set_page_dirty(dentry_page); |
| f2fs_put_page(dentry_page, 1); |
| return 0; |
| } |
| |
| bool f2fs_empty_dir(struct inode *dir) |
| { |
| unsigned long bidx; |
| struct page *dentry_page; |
| unsigned int bit_pos; |
| struct f2fs_dentry_block *dentry_blk; |
| unsigned long nblock = dir_blocks(dir); |
| |
| for (bidx = 0; bidx < nblock; bidx++) { |
| void *kaddr; |
| dentry_page = get_lock_data_page(dir, bidx); |
| if (IS_ERR(dentry_page)) { |
| if (PTR_ERR(dentry_page) == -ENOENT) |
| continue; |
| else |
| return false; |
| } |
| |
| kaddr = kmap_atomic(dentry_page); |
| dentry_blk = (struct f2fs_dentry_block *)kaddr; |
| if (bidx == 0) |
| bit_pos = 2; |
| else |
| bit_pos = 0; |
| bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, |
| NR_DENTRY_IN_BLOCK, |
| bit_pos); |
| kunmap_atomic(kaddr); |
| |
| f2fs_put_page(dentry_page, 1); |
| |
| if (bit_pos < NR_DENTRY_IN_BLOCK) |
| return false; |
| } |
| return true; |
| } |
| |
| static int f2fs_readdir(struct file *file, void *dirent, filldir_t filldir) |
| { |
| unsigned long pos = file->f_pos; |
| struct inode *inode = file->f_dentry->d_inode; |
| unsigned long npages = dir_blocks(inode); |
| unsigned char *types = NULL; |
| unsigned int bit_pos = 0, start_bit_pos = 0; |
| int over = 0; |
| struct f2fs_dentry_block *dentry_blk = NULL; |
| struct f2fs_dir_entry *de = NULL; |
| struct page *dentry_page = NULL; |
| unsigned int n = 0; |
| unsigned char d_type = DT_UNKNOWN; |
| int slots; |
| |
| types = f2fs_filetype_table; |
| bit_pos = (pos % NR_DENTRY_IN_BLOCK); |
| n = (pos / NR_DENTRY_IN_BLOCK); |
| |
| for ( ; n < npages; n++) { |
| dentry_page = get_lock_data_page(inode, n); |
| if (IS_ERR(dentry_page)) |
| continue; |
| |
| start_bit_pos = bit_pos; |
| dentry_blk = kmap(dentry_page); |
| while (bit_pos < NR_DENTRY_IN_BLOCK) { |
| d_type = DT_UNKNOWN; |
| bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, |
| NR_DENTRY_IN_BLOCK, |
| bit_pos); |
| if (bit_pos >= NR_DENTRY_IN_BLOCK) |
| break; |
| |
| de = &dentry_blk->dentry[bit_pos]; |
| if (types && de->file_type < F2FS_FT_MAX) |
| d_type = types[de->file_type]; |
| |
| over = filldir(dirent, |
| dentry_blk->filename[bit_pos], |
| le16_to_cpu(de->name_len), |
| (n * NR_DENTRY_IN_BLOCK) + bit_pos, |
| le32_to_cpu(de->ino), d_type); |
| if (over) { |
| file->f_pos += bit_pos - start_bit_pos; |
| goto success; |
| } |
| slots = GET_DENTRY_SLOTS(le16_to_cpu(de->name_len)); |
| bit_pos += slots; |
| } |
| bit_pos = 0; |
| file->f_pos = (n + 1) * NR_DENTRY_IN_BLOCK; |
| kunmap(dentry_page); |
| f2fs_put_page(dentry_page, 1); |
| dentry_page = NULL; |
| } |
| success: |
| if (dentry_page && !IS_ERR(dentry_page)) { |
| kunmap(dentry_page); |
| f2fs_put_page(dentry_page, 1); |
| } |
| |
| return 0; |
| } |
| |
| const struct file_operations f2fs_dir_operations = { |
| .llseek = generic_file_llseek, |
| .read = generic_read_dir, |
| .readdir = f2fs_readdir, |
| .fsync = f2fs_sync_file, |
| .unlocked_ioctl = f2fs_ioctl, |
| }; |