Jaegeuk Kim | 0a8165d | 2012-11-29 13:28:09 +0900 | [diff] [blame] | 1 | /* |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 2 | * fs/f2fs/dir.c |
| 3 | * |
| 4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. |
| 5 | * http://www.samsung.com/ |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | #include <linux/fs.h> |
| 12 | #include <linux/f2fs_fs.h> |
| 13 | #include "f2fs.h" |
Jaegeuk Kim | 398b1ac | 2012-12-19 15:28:39 +0900 | [diff] [blame] | 14 | #include "node.h" |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 15 | #include "acl.h" |
Jaegeuk Kim | 8ae8f16 | 2013-06-03 19:46:19 +0900 | [diff] [blame] | 16 | #include "xattr.h" |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 17 | |
| 18 | static unsigned long dir_blocks(struct inode *inode) |
| 19 | { |
| 20 | return ((unsigned long long) (i_size_read(inode) + PAGE_CACHE_SIZE - 1)) |
| 21 | >> PAGE_CACHE_SHIFT; |
| 22 | } |
| 23 | |
Jaegeuk Kim | 3843154 | 2014-02-27 18:20:00 +0900 | [diff] [blame] | 24 | static unsigned int dir_buckets(unsigned int level, int dir_level) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 25 | { |
Chao Yu | bfec07d | 2014-05-28 08:56:09 +0800 | [diff] [blame] | 26 | if (level + dir_level < MAX_DIR_HASH_DEPTH / 2) |
Jaegeuk Kim | 3843154 | 2014-02-27 18:20:00 +0900 | [diff] [blame] | 27 | return 1 << (level + dir_level); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 28 | else |
Chao Yu | bfec07d | 2014-05-28 08:56:09 +0800 | [diff] [blame] | 29 | return MAX_DIR_BUCKETS; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 30 | } |
| 31 | |
| 32 | static unsigned int bucket_blocks(unsigned int level) |
| 33 | { |
| 34 | if (level < MAX_DIR_HASH_DEPTH / 2) |
| 35 | return 2; |
| 36 | else |
| 37 | return 4; |
| 38 | } |
| 39 | |
Chao Yu | dbeacf0 | 2014-09-24 18:17:04 +0800 | [diff] [blame] | 40 | unsigned char f2fs_filetype_table[F2FS_FT_MAX] = { |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 41 | [F2FS_FT_UNKNOWN] = DT_UNKNOWN, |
| 42 | [F2FS_FT_REG_FILE] = DT_REG, |
| 43 | [F2FS_FT_DIR] = DT_DIR, |
| 44 | [F2FS_FT_CHRDEV] = DT_CHR, |
| 45 | [F2FS_FT_BLKDEV] = DT_BLK, |
| 46 | [F2FS_FT_FIFO] = DT_FIFO, |
| 47 | [F2FS_FT_SOCK] = DT_SOCK, |
| 48 | [F2FS_FT_SYMLINK] = DT_LNK, |
| 49 | }; |
| 50 | |
| 51 | #define S_SHIFT 12 |
| 52 | static unsigned char f2fs_type_by_mode[S_IFMT >> S_SHIFT] = { |
| 53 | [S_IFREG >> S_SHIFT] = F2FS_FT_REG_FILE, |
| 54 | [S_IFDIR >> S_SHIFT] = F2FS_FT_DIR, |
| 55 | [S_IFCHR >> S_SHIFT] = F2FS_FT_CHRDEV, |
| 56 | [S_IFBLK >> S_SHIFT] = F2FS_FT_BLKDEV, |
| 57 | [S_IFIFO >> S_SHIFT] = F2FS_FT_FIFO, |
| 58 | [S_IFSOCK >> S_SHIFT] = F2FS_FT_SOCK, |
| 59 | [S_IFLNK >> S_SHIFT] = F2FS_FT_SYMLINK, |
| 60 | }; |
| 61 | |
Chao Yu | dbeacf0 | 2014-09-24 18:17:04 +0800 | [diff] [blame] | 62 | void set_de_type(struct f2fs_dir_entry *de, struct inode *inode) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 63 | { |
Al Viro | 0ecc833 | 2013-03-29 12:23:28 -0400 | [diff] [blame] | 64 | umode_t mode = inode->i_mode; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 65 | de->file_type = f2fs_type_by_mode[(mode & S_IFMT) >> S_SHIFT]; |
| 66 | } |
| 67 | |
Jaegeuk Kim | 3843154 | 2014-02-27 18:20:00 +0900 | [diff] [blame] | 68 | static unsigned long dir_block_index(unsigned int level, |
| 69 | int dir_level, unsigned int idx) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 70 | { |
| 71 | unsigned long i; |
| 72 | unsigned long bidx = 0; |
| 73 | |
| 74 | for (i = 0; i < level; i++) |
Jaegeuk Kim | 3843154 | 2014-02-27 18:20:00 +0900 | [diff] [blame] | 75 | bidx += dir_buckets(i, dir_level) * bucket_blocks(i); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 76 | bidx += idx * bucket_blocks(level); |
| 77 | return bidx; |
| 78 | } |
| 79 | |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 80 | static bool early_match_name(size_t namelen, f2fs_hash_t namehash, |
Gu Zheng | eee6160 | 2014-06-24 18:21:23 +0800 | [diff] [blame] | 81 | struct f2fs_dir_entry *de) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 82 | { |
| 83 | if (le16_to_cpu(de->name_len) != namelen) |
| 84 | return false; |
| 85 | |
Jaegeuk Kim | 25ca923 | 2012-11-28 16:12:41 +0900 | [diff] [blame] | 86 | if (de->hash_code != namehash) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 87 | return false; |
| 88 | |
| 89 | return true; |
| 90 | } |
| 91 | |
| 92 | static struct f2fs_dir_entry *find_in_block(struct page *dentry_page, |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 93 | struct qstr *name, int *max_slots, |
| 94 | struct page **res_page) |
| 95 | { |
| 96 | struct f2fs_dentry_block *dentry_blk; |
| 97 | struct f2fs_dir_entry *de; |
| 98 | |
| 99 | *max_slots = NR_DENTRY_IN_BLOCK; |
| 100 | |
| 101 | dentry_blk = (struct f2fs_dentry_block *)kmap(dentry_page); |
| 102 | de = find_target_dentry(name, max_slots, &dentry_blk->dentry_bitmap, |
| 103 | dentry_blk->dentry, |
| 104 | dentry_blk->filename); |
| 105 | if (de) |
| 106 | *res_page = dentry_page; |
| 107 | else |
| 108 | kunmap(dentry_page); |
| 109 | |
| 110 | /* |
| 111 | * For the most part, it should be a bug when name_len is zero. |
| 112 | * We stop here for figuring out where the bugs has occurred. |
| 113 | */ |
| 114 | f2fs_bug_on(F2FS_P_SB(dentry_page), *max_slots < 0); |
| 115 | return de; |
| 116 | } |
| 117 | |
| 118 | struct f2fs_dir_entry *find_target_dentry(struct qstr *name, int *max_slots, |
| 119 | const void *bitmap, struct f2fs_dir_entry *dentry, |
| 120 | __u8 (*filenames)[F2FS_SLOT_LEN]) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 121 | { |
| 122 | struct f2fs_dir_entry *de; |
Jaegeuk Kim | 5d0c6671 | 2014-02-27 13:57:53 +0900 | [diff] [blame] | 123 | unsigned long bit_pos = 0; |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 124 | f2fs_hash_t namehash = f2fs_dentry_hash(name); |
| 125 | int max_bits = *max_slots; |
Jaegeuk Kim | 5d0c6671 | 2014-02-27 13:57:53 +0900 | [diff] [blame] | 126 | int max_len = 0; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 127 | |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 128 | *max_slots = 0; |
| 129 | while (bit_pos < max_bits) { |
| 130 | if (!test_bit_le(bit_pos, bitmap)) { |
Jaegeuk Kim | 5d0c6671 | 2014-02-27 13:57:53 +0900 | [diff] [blame] | 131 | if (bit_pos == 0) |
| 132 | max_len = 1; |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 133 | else if (!test_bit_le(bit_pos - 1, bitmap)) |
Jaegeuk Kim | 5d0c6671 | 2014-02-27 13:57:53 +0900 | [diff] [blame] | 134 | max_len++; |
| 135 | bit_pos++; |
| 136 | continue; |
| 137 | } |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 138 | de = &dentry[bit_pos]; |
| 139 | if (early_match_name(name->len, namehash, de) && |
| 140 | !memcmp(filenames[bit_pos], name->name, name->len)) |
| 141 | goto found; |
| 142 | |
| 143 | if (*max_slots >= 0 && max_len > *max_slots) { |
Jaegeuk Kim | 5d0c6671 | 2014-02-27 13:57:53 +0900 | [diff] [blame] | 144 | *max_slots = max_len; |
| 145 | max_len = 0; |
| 146 | } |
Chao Yu | 81e366f8 | 2014-07-10 12:37:46 +0800 | [diff] [blame] | 147 | |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 148 | /* remain bug on condition */ |
| 149 | if (unlikely(!de->name_len)) |
| 150 | *max_slots = -1; |
Chao Yu | 81e366f8 | 2014-07-10 12:37:46 +0800 | [diff] [blame] | 151 | |
Jaegeuk Kim | 5d0c6671 | 2014-02-27 13:57:53 +0900 | [diff] [blame] | 152 | bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len)); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | de = NULL; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 156 | found: |
Jaegeuk Kim | 5d0c6671 | 2014-02-27 13:57:53 +0900 | [diff] [blame] | 157 | if (max_len > *max_slots) |
| 158 | *max_slots = max_len; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 159 | return de; |
| 160 | } |
| 161 | |
| 162 | static struct f2fs_dir_entry *find_in_level(struct inode *dir, |
Gu Zheng | eee6160 | 2014-06-24 18:21:23 +0800 | [diff] [blame] | 163 | unsigned int level, struct qstr *name, |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 164 | f2fs_hash_t namehash, struct page **res_page) |
| 165 | { |
Gu Zheng | eee6160 | 2014-06-24 18:21:23 +0800 | [diff] [blame] | 166 | int s = GET_DENTRY_SLOTS(name->len); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 167 | unsigned int nbucket, nblock; |
| 168 | unsigned int bidx, end_block; |
| 169 | struct page *dentry_page; |
| 170 | struct f2fs_dir_entry *de = NULL; |
| 171 | bool room = false; |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 172 | int max_slots; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 173 | |
Jaegeuk Kim | 9850cf4 | 2014-09-02 15:52:58 -0700 | [diff] [blame] | 174 | f2fs_bug_on(F2FS_I_SB(dir), level > MAX_DIR_HASH_DEPTH); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 175 | |
Jaegeuk Kim | 3843154 | 2014-02-27 18:20:00 +0900 | [diff] [blame] | 176 | nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 177 | nblock = bucket_blocks(level); |
| 178 | |
Jaegeuk Kim | 3843154 | 2014-02-27 18:20:00 +0900 | [diff] [blame] | 179 | bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level, |
| 180 | le32_to_cpu(namehash) % nbucket); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 181 | end_block = bidx + nblock; |
| 182 | |
| 183 | for (; bidx < end_block; bidx++) { |
| 184 | /* no need to allocate new dentry pages to all the indices */ |
Jaegeuk Kim | c718379b | 2013-04-24 13:19:56 +0900 | [diff] [blame] | 185 | dentry_page = find_data_page(dir, bidx, true); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 186 | if (IS_ERR(dentry_page)) { |
| 187 | room = true; |
| 188 | continue; |
| 189 | } |
| 190 | |
Jaegeuk Kim | 4e6ebf6 | 2014-10-13 17:26:14 -0700 | [diff] [blame] | 191 | de = find_in_block(dentry_page, name, &max_slots, res_page); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 192 | if (de) |
| 193 | break; |
| 194 | |
| 195 | if (max_slots >= s) |
| 196 | room = true; |
| 197 | f2fs_put_page(dentry_page, 0); |
| 198 | } |
| 199 | |
| 200 | if (!de && room && F2FS_I(dir)->chash != namehash) { |
| 201 | F2FS_I(dir)->chash = namehash; |
| 202 | F2FS_I(dir)->clevel = level; |
| 203 | } |
| 204 | |
| 205 | return de; |
| 206 | } |
| 207 | |
| 208 | /* |
| 209 | * Find an entry in the specified directory with the wanted name. |
| 210 | * It returns the page where the entry was found (as a parameter - res_page), |
| 211 | * and the entry itself. Page is returned mapped and unlocked. |
| 212 | * Entry is guaranteed to be valid. |
| 213 | */ |
| 214 | struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir, |
| 215 | struct qstr *child, struct page **res_page) |
| 216 | { |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 217 | unsigned long npages = dir_blocks(dir); |
| 218 | struct f2fs_dir_entry *de = NULL; |
| 219 | f2fs_hash_t name_hash; |
| 220 | unsigned int max_depth; |
| 221 | unsigned int level; |
| 222 | |
Chao Yu | 622f28a | 2014-09-24 18:19:10 +0800 | [diff] [blame] | 223 | if (f2fs_has_inline_dentry(dir)) |
| 224 | return find_in_inline_dir(dir, child, res_page); |
| 225 | |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 226 | if (npages == 0) |
| 227 | return NULL; |
| 228 | |
| 229 | *res_page = NULL; |
| 230 | |
Gu Zheng | eee6160 | 2014-06-24 18:21:23 +0800 | [diff] [blame] | 231 | name_hash = f2fs_dentry_hash(child); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 232 | max_depth = F2FS_I(dir)->i_current_depth; |
| 233 | |
| 234 | for (level = 0; level < max_depth; level++) { |
Gu Zheng | eee6160 | 2014-06-24 18:21:23 +0800 | [diff] [blame] | 235 | de = find_in_level(dir, level, child, name_hash, res_page); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 236 | if (de) |
| 237 | break; |
| 238 | } |
| 239 | if (!de && F2FS_I(dir)->chash != name_hash) { |
| 240 | F2FS_I(dir)->chash = name_hash; |
| 241 | F2FS_I(dir)->clevel = level - 1; |
| 242 | } |
| 243 | return de; |
| 244 | } |
| 245 | |
| 246 | struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p) |
| 247 | { |
Namjae Jeon | 4777f86 | 2013-05-23 22:58:07 +0900 | [diff] [blame] | 248 | struct page *page; |
| 249 | struct f2fs_dir_entry *de; |
| 250 | struct f2fs_dentry_block *dentry_blk; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 251 | |
Chao Yu | 622f28a | 2014-09-24 18:19:10 +0800 | [diff] [blame] | 252 | if (f2fs_has_inline_dentry(dir)) |
| 253 | return f2fs_parent_inline_dir(dir, p); |
| 254 | |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 255 | page = get_lock_data_page(dir, 0); |
| 256 | if (IS_ERR(page)) |
| 257 | return NULL; |
| 258 | |
| 259 | dentry_blk = kmap(page); |
| 260 | de = &dentry_blk->dentry[1]; |
| 261 | *p = page; |
| 262 | unlock_page(page); |
| 263 | return de; |
| 264 | } |
| 265 | |
| 266 | ino_t f2fs_inode_by_name(struct inode *dir, struct qstr *qstr) |
| 267 | { |
| 268 | ino_t res = 0; |
| 269 | struct f2fs_dir_entry *de; |
| 270 | struct page *page; |
| 271 | |
| 272 | de = f2fs_find_entry(dir, qstr, &page); |
| 273 | if (de) { |
| 274 | res = le32_to_cpu(de->ino); |
Chao Yu | 622f28a | 2014-09-24 18:19:10 +0800 | [diff] [blame] | 275 | if (!f2fs_has_inline_dentry(dir)) |
| 276 | kunmap(page); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 277 | f2fs_put_page(page, 0); |
| 278 | } |
| 279 | |
| 280 | return res; |
| 281 | } |
| 282 | |
| 283 | void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de, |
| 284 | struct page *page, struct inode *inode) |
| 285 | { |
Jaegeuk Kim | 59a0615 | 2014-10-13 19:34:26 -0700 | [diff] [blame^] | 286 | enum page_type type = f2fs_has_inline_dentry(dir) ? NODE : DATA; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 287 | lock_page(page); |
Jaegeuk Kim | 59a0615 | 2014-10-13 19:34:26 -0700 | [diff] [blame^] | 288 | f2fs_wait_on_page_writeback(page, type); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 289 | de->ino = cpu_to_le32(inode->i_ino); |
| 290 | set_de_type(de, inode); |
Chao Yu | 622f28a | 2014-09-24 18:19:10 +0800 | [diff] [blame] | 291 | if (!f2fs_has_inline_dentry(dir)) |
| 292 | kunmap(page); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 293 | set_page_dirty(page); |
| 294 | dir->i_mtime = dir->i_ctime = CURRENT_TIME; |
| 295 | mark_inode_dirty(dir); |
Jaegeuk Kim | 6666e6a | 2012-12-10 17:52:48 +0900 | [diff] [blame] | 296 | |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 297 | f2fs_put_page(page, 1); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 298 | } |
| 299 | |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 300 | static void init_dent_inode(const struct qstr *name, struct page *ipage) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 301 | { |
Jaegeuk Kim | 58bfaf4 | 2013-12-26 16:30:41 +0900 | [diff] [blame] | 302 | struct f2fs_inode *ri; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 303 | |
Jaegeuk Kim | 54b591d | 2014-04-29 17:28:32 +0900 | [diff] [blame] | 304 | f2fs_wait_on_page_writeback(ipage, NODE); |
| 305 | |
Al Viro | 53dc9a6 | 2013-01-25 16:01:21 -0500 | [diff] [blame] | 306 | /* copy name info. to this inode page */ |
Jaegeuk Kim | 58bfaf4 | 2013-12-26 16:30:41 +0900 | [diff] [blame] | 307 | ri = F2FS_INODE(ipage); |
| 308 | ri->i_namelen = cpu_to_le32(name->len); |
| 309 | memcpy(ri->i_name, name->name, name->len); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 310 | set_page_dirty(ipage); |
| 311 | } |
| 312 | |
Jaegeuk Kim | 1cd14ca | 2013-07-18 18:02:31 +0900 | [diff] [blame] | 313 | int update_dent_inode(struct inode *inode, const struct qstr *name) |
| 314 | { |
Jaegeuk Kim | 1cd14ca | 2013-07-18 18:02:31 +0900 | [diff] [blame] | 315 | struct page *page; |
| 316 | |
Jaegeuk Kim | 4081363 | 2014-09-02 15:31:18 -0700 | [diff] [blame] | 317 | page = get_node_page(F2FS_I_SB(inode), inode->i_ino); |
Jaegeuk Kim | 1cd14ca | 2013-07-18 18:02:31 +0900 | [diff] [blame] | 318 | if (IS_ERR(page)) |
| 319 | return PTR_ERR(page); |
| 320 | |
| 321 | init_dent_inode(name, page); |
| 322 | f2fs_put_page(page, 1); |
| 323 | |
| 324 | return 0; |
| 325 | } |
| 326 | |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 327 | static int make_empty_dir(struct inode *inode, |
| 328 | struct inode *parent, struct page *page) |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 329 | { |
| 330 | struct page *dentry_page; |
| 331 | struct f2fs_dentry_block *dentry_blk; |
| 332 | struct f2fs_dir_entry *de; |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 333 | |
Chao Yu | 622f28a | 2014-09-24 18:19:10 +0800 | [diff] [blame] | 334 | if (f2fs_has_inline_dentry(inode)) |
| 335 | return make_empty_inline_dir(inode, parent, page); |
| 336 | |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 337 | dentry_page = get_new_data_page(inode, page, 0, true); |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 338 | if (IS_ERR(dentry_page)) |
| 339 | return PTR_ERR(dentry_page); |
| 340 | |
Gu Zheng | 1c3bb97 | 2014-06-27 17:57:04 +0800 | [diff] [blame] | 341 | dentry_blk = kmap_atomic(dentry_page); |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 342 | |
| 343 | de = &dentry_blk->dentry[0]; |
| 344 | de->name_len = cpu_to_le16(1); |
| 345 | de->hash_code = 0; |
| 346 | de->ino = cpu_to_le32(inode->i_ino); |
| 347 | memcpy(dentry_blk->filename[0], ".", 1); |
| 348 | set_de_type(de, inode); |
| 349 | |
| 350 | de = &dentry_blk->dentry[1]; |
| 351 | de->hash_code = 0; |
| 352 | de->name_len = cpu_to_le16(2); |
| 353 | de->ino = cpu_to_le32(parent->i_ino); |
| 354 | memcpy(dentry_blk->filename[1], "..", 2); |
| 355 | set_de_type(de, inode); |
| 356 | |
| 357 | test_and_set_bit_le(0, &dentry_blk->dentry_bitmap); |
| 358 | test_and_set_bit_le(1, &dentry_blk->dentry_bitmap); |
Gu Zheng | 1c3bb97 | 2014-06-27 17:57:04 +0800 | [diff] [blame] | 359 | kunmap_atomic(dentry_blk); |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 360 | |
| 361 | set_page_dirty(dentry_page); |
| 362 | f2fs_put_page(dentry_page, 1); |
| 363 | return 0; |
| 364 | } |
| 365 | |
Chao Yu | dbeacf0 | 2014-09-24 18:17:04 +0800 | [diff] [blame] | 366 | struct page *init_inode_metadata(struct inode *inode, |
Al Viro | 69f24ea | 2013-01-25 16:08:53 -0500 | [diff] [blame] | 367 | struct inode *dir, const struct qstr *name) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 368 | { |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 369 | struct page *page; |
| 370 | int err; |
| 371 | |
Jaegeuk Kim | b97a9b5 | 2014-06-20 21:37:02 -0700 | [diff] [blame] | 372 | if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) { |
Jaegeuk Kim | a014e03 | 2014-06-20 21:44:02 -0700 | [diff] [blame] | 373 | page = new_inode_page(inode); |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 374 | if (IS_ERR(page)) |
| 375 | return page; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 376 | |
| 377 | if (S_ISDIR(inode->i_mode)) { |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 378 | err = make_empty_dir(inode, dir, page); |
| 379 | if (err) |
| 380 | goto error; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 381 | } |
| 382 | |
Jaegeuk Kim | 2ed2d5b | 2013-10-28 13:17:54 +0900 | [diff] [blame] | 383 | err = f2fs_init_acl(inode, dir, page); |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 384 | if (err) |
Jaegeuk Kim | a886537 | 2013-12-27 17:04:17 +0900 | [diff] [blame] | 385 | goto put_error; |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 386 | |
Jaegeuk Kim | 8ae8f16 | 2013-06-03 19:46:19 +0900 | [diff] [blame] | 387 | err = f2fs_init_security(inode, dir, name, page); |
| 388 | if (err) |
Jaegeuk Kim | a886537 | 2013-12-27 17:04:17 +0900 | [diff] [blame] | 389 | goto put_error; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 390 | } else { |
Jaegeuk Kim | 4081363 | 2014-09-02 15:31:18 -0700 | [diff] [blame] | 391 | page = get_node_page(F2FS_I_SB(dir), inode->i_ino); |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 392 | if (IS_ERR(page)) |
| 393 | return page; |
| 394 | |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 395 | set_cold_node(inode, page); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 396 | } |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 397 | |
Jaegeuk Kim | b97a9b5 | 2014-06-20 21:37:02 -0700 | [diff] [blame] | 398 | if (name) |
| 399 | init_dent_inode(name, page); |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 400 | |
Jaegeuk Kim | 83d5d6f | 2013-05-28 12:25:47 +0900 | [diff] [blame] | 401 | /* |
| 402 | * This file should be checkpointed during fsync. |
| 403 | * We lost i_pino from now on. |
| 404 | */ |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 405 | if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK)) { |
Jaegeuk Kim | 354a339 | 2013-06-14 08:52:35 +0900 | [diff] [blame] | 406 | file_lost_pino(inode); |
Chao Yu | 50732df | 2014-06-19 16:23:19 +0800 | [diff] [blame] | 407 | /* |
| 408 | * If link the tmpfile to alias through linkat path, |
| 409 | * we should remove this inode from orphan list. |
| 410 | */ |
| 411 | if (inode->i_nlink == 0) |
Jaegeuk Kim | 4081363 | 2014-09-02 15:31:18 -0700 | [diff] [blame] | 412 | remove_orphan_inode(F2FS_I_SB(dir), inode->i_ino); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 413 | inc_nlink(inode); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 414 | } |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 415 | return page; |
| 416 | |
Jaegeuk Kim | a886537 | 2013-12-27 17:04:17 +0900 | [diff] [blame] | 417 | put_error: |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 418 | f2fs_put_page(page, 1); |
Chao Yu | 90d7245 | 2014-06-24 10:34:00 +0800 | [diff] [blame] | 419 | error: |
Jaegeuk Kim | bd859c6 | 2014-02-05 11:16:39 +0900 | [diff] [blame] | 420 | /* once the failed inode becomes a bad inode, i_mode is S_IFREG */ |
| 421 | truncate_inode_pages(&inode->i_data, 0); |
Jaegeuk Kim | 764aa3e | 2014-08-14 16:32:54 -0700 | [diff] [blame] | 422 | truncate_blocks(inode, 0, false); |
Jaegeuk Kim | bd859c6 | 2014-02-05 11:16:39 +0900 | [diff] [blame] | 423 | remove_dirty_dir_inode(inode); |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 424 | remove_inode_page(inode); |
| 425 | return ERR_PTR(err); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 426 | } |
| 427 | |
Chao Yu | dbeacf0 | 2014-09-24 18:17:04 +0800 | [diff] [blame] | 428 | void update_parent_metadata(struct inode *dir, struct inode *inode, |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 429 | unsigned int current_depth) |
| 430 | { |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 431 | if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) { |
| 432 | if (S_ISDIR(inode->i_mode)) { |
| 433 | inc_nlink(dir); |
Jaegeuk Kim | 699489b | 2013-06-07 22:08:23 +0900 | [diff] [blame] | 434 | set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 435 | } |
| 436 | clear_inode_flag(F2FS_I(inode), FI_NEW_INODE); |
| 437 | } |
| 438 | dir->i_mtime = dir->i_ctime = CURRENT_TIME; |
Jaegeuk Kim | a18ff06 | 2014-01-21 13:32:12 +0900 | [diff] [blame] | 439 | mark_inode_dirty(dir); |
| 440 | |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 441 | if (F2FS_I(dir)->i_current_depth != current_depth) { |
| 442 | F2FS_I(dir)->i_current_depth = current_depth; |
Jaegeuk Kim | 699489b | 2013-06-07 22:08:23 +0900 | [diff] [blame] | 443 | set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 444 | } |
| 445 | |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 446 | if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK)) |
| 447 | clear_inode_flag(F2FS_I(inode), FI_INC_LINK); |
| 448 | } |
| 449 | |
Jaegeuk Kim | a82afa2 | 2014-10-13 16:28:13 -0700 | [diff] [blame] | 450 | int room_for_filename(const void *bitmap, int slots, int max_slots) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 451 | { |
| 452 | int bit_start = 0; |
| 453 | int zero_start, zero_end; |
| 454 | next: |
Jaegeuk Kim | a82afa2 | 2014-10-13 16:28:13 -0700 | [diff] [blame] | 455 | zero_start = find_next_zero_bit_le(bitmap, max_slots, bit_start); |
| 456 | if (zero_start >= max_slots) |
| 457 | return max_slots; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 458 | |
Jaegeuk Kim | a82afa2 | 2014-10-13 16:28:13 -0700 | [diff] [blame] | 459 | zero_end = find_next_bit_le(bitmap, max_slots, zero_start); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 460 | if (zero_end - zero_start >= slots) |
| 461 | return zero_start; |
| 462 | |
| 463 | bit_start = zero_end + 1; |
| 464 | |
Jaegeuk Kim | a82afa2 | 2014-10-13 16:28:13 -0700 | [diff] [blame] | 465 | if (zero_end + 1 >= max_slots) |
| 466 | return max_slots; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 467 | goto next; |
| 468 | } |
| 469 | |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 470 | /* |
Chao Yu | 4f4124d | 2013-12-21 18:02:14 +0800 | [diff] [blame] | 471 | * Caller should grab and release a rwsem by calling f2fs_lock_op() and |
| 472 | * f2fs_unlock_op(). |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 473 | */ |
Chris Fries | 6c311ec | 2014-01-17 14:44:39 -0600 | [diff] [blame] | 474 | int __f2fs_add_link(struct inode *dir, const struct qstr *name, |
| 475 | struct inode *inode) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 476 | { |
| 477 | unsigned int bit_pos; |
| 478 | unsigned int level; |
| 479 | unsigned int current_depth; |
| 480 | unsigned long bidx, block; |
| 481 | f2fs_hash_t dentry_hash; |
| 482 | struct f2fs_dir_entry *de; |
| 483 | unsigned int nbucket, nblock; |
Al Viro | b7f7a5e | 2013-01-25 16:15:43 -0500 | [diff] [blame] | 484 | size_t namelen = name->len; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 485 | struct page *dentry_page = NULL; |
| 486 | struct f2fs_dentry_block *dentry_blk = NULL; |
Namjae Jeon | 457d08e | 2012-12-08 14:54:50 +0900 | [diff] [blame] | 487 | int slots = GET_DENTRY_SLOTS(namelen); |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 488 | struct page *page; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 489 | int err = 0; |
| 490 | int i; |
| 491 | |
Chao Yu | 622f28a | 2014-09-24 18:19:10 +0800 | [diff] [blame] | 492 | if (f2fs_has_inline_dentry(dir)) { |
| 493 | err = f2fs_add_inline_entry(dir, name, inode); |
| 494 | if (!err || err != -EAGAIN) |
| 495 | return err; |
| 496 | else |
| 497 | err = 0; |
| 498 | } |
| 499 | |
Gu Zheng | eee6160 | 2014-06-24 18:21:23 +0800 | [diff] [blame] | 500 | dentry_hash = f2fs_dentry_hash(name); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 501 | level = 0; |
| 502 | current_depth = F2FS_I(dir)->i_current_depth; |
| 503 | if (F2FS_I(dir)->chash == dentry_hash) { |
| 504 | level = F2FS_I(dir)->clevel; |
| 505 | F2FS_I(dir)->chash = 0; |
| 506 | } |
| 507 | |
| 508 | start: |
Chao Yu | cfb271d | 2013-12-05 17:15:22 +0800 | [diff] [blame] | 509 | if (unlikely(current_depth == MAX_DIR_HASH_DEPTH)) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 510 | return -ENOSPC; |
| 511 | |
| 512 | /* Increase the depth, if required */ |
| 513 | if (level == current_depth) |
| 514 | ++current_depth; |
| 515 | |
Jaegeuk Kim | 3843154 | 2014-02-27 18:20:00 +0900 | [diff] [blame] | 516 | nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 517 | nblock = bucket_blocks(level); |
| 518 | |
Jaegeuk Kim | 3843154 | 2014-02-27 18:20:00 +0900 | [diff] [blame] | 519 | bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level, |
| 520 | (le32_to_cpu(dentry_hash) % nbucket)); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 521 | |
| 522 | for (block = bidx; block <= (bidx + nblock - 1); block++) { |
Jaegeuk Kim | 64aa7ed | 2013-05-20 09:55:50 +0900 | [diff] [blame] | 523 | dentry_page = get_new_data_page(dir, NULL, block, true); |
Jaegeuk Kim | 3993683 | 2012-11-22 16:21:29 +0900 | [diff] [blame] | 524 | if (IS_ERR(dentry_page)) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 525 | return PTR_ERR(dentry_page); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 526 | |
| 527 | dentry_blk = kmap(dentry_page); |
Jaegeuk Kim | a82afa2 | 2014-10-13 16:28:13 -0700 | [diff] [blame] | 528 | bit_pos = room_for_filename(&dentry_blk->dentry_bitmap, |
| 529 | slots, NR_DENTRY_IN_BLOCK); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 530 | if (bit_pos < NR_DENTRY_IN_BLOCK) |
| 531 | goto add_dentry; |
| 532 | |
| 533 | kunmap(dentry_page); |
| 534 | f2fs_put_page(dentry_page, 1); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 535 | } |
| 536 | |
| 537 | /* Move to next level to find the empty slot for new dentry */ |
| 538 | ++level; |
| 539 | goto start; |
| 540 | add_dentry: |
Jaegeuk Kim | 3cb5ad1 | 2014-03-18 13:29:07 +0900 | [diff] [blame] | 541 | f2fs_wait_on_page_writeback(dentry_page, DATA); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 542 | |
Jaegeuk Kim | d928bfb | 2014-03-20 19:10:08 +0900 | [diff] [blame] | 543 | down_write(&F2FS_I(inode)->i_sem); |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 544 | page = init_inode_metadata(inode, dir, name); |
| 545 | if (IS_ERR(page)) { |
| 546 | err = PTR_ERR(page); |
| 547 | goto fail; |
| 548 | } |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 549 | de = &dentry_blk->dentry[bit_pos]; |
Jaegeuk Kim | 25ca923 | 2012-11-28 16:12:41 +0900 | [diff] [blame] | 550 | de->hash_code = dentry_hash; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 551 | de->name_len = cpu_to_le16(namelen); |
Al Viro | b7f7a5e | 2013-01-25 16:15:43 -0500 | [diff] [blame] | 552 | memcpy(dentry_blk->filename[bit_pos], name->name, name->len); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 553 | de->ino = cpu_to_le32(inode->i_ino); |
| 554 | set_de_type(de, inode); |
| 555 | for (i = 0; i < slots; i++) |
| 556 | test_and_set_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap); |
| 557 | set_page_dirty(dentry_page); |
Jaegeuk Kim | 6666e6a | 2012-12-10 17:52:48 +0900 | [diff] [blame] | 558 | |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 559 | /* we don't need to mark_inode_dirty now */ |
Jaegeuk Kim | 6666e6a | 2012-12-10 17:52:48 +0900 | [diff] [blame] | 560 | F2FS_I(inode)->i_pino = dir->i_ino; |
Jaegeuk Kim | 44a83ff | 2013-05-20 10:10:29 +0900 | [diff] [blame] | 561 | update_inode(inode, page); |
| 562 | f2fs_put_page(page, 1); |
| 563 | |
| 564 | update_parent_metadata(dir, inode, current_depth); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 565 | fail: |
Jaegeuk Kim | d928bfb | 2014-03-20 19:10:08 +0900 | [diff] [blame] | 566 | up_write(&F2FS_I(inode)->i_sem); |
| 567 | |
Jaegeuk Kim | 924a2dd | 2014-02-03 17:24:51 +0900 | [diff] [blame] | 568 | if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR)) { |
| 569 | update_inode_page(dir); |
| 570 | clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR); |
| 571 | } |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 572 | kunmap(dentry_page); |
| 573 | f2fs_put_page(dentry_page, 1); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 574 | return err; |
| 575 | } |
| 576 | |
Jaegeuk Kim | b97a9b5 | 2014-06-20 21:37:02 -0700 | [diff] [blame] | 577 | int f2fs_do_tmpfile(struct inode *inode, struct inode *dir) |
| 578 | { |
| 579 | struct page *page; |
| 580 | int err = 0; |
| 581 | |
| 582 | down_write(&F2FS_I(inode)->i_sem); |
| 583 | page = init_inode_metadata(inode, dir, NULL); |
| 584 | if (IS_ERR(page)) { |
| 585 | err = PTR_ERR(page); |
| 586 | goto fail; |
| 587 | } |
| 588 | /* we don't need to mark_inode_dirty now */ |
| 589 | update_inode(inode, page); |
| 590 | f2fs_put_page(page, 1); |
| 591 | |
| 592 | clear_inode_flag(F2FS_I(inode), FI_NEW_INODE); |
| 593 | fail: |
| 594 | up_write(&F2FS_I(inode)->i_sem); |
| 595 | return err; |
| 596 | } |
| 597 | |
Chao Yu | dbeacf0 | 2014-09-24 18:17:04 +0800 | [diff] [blame] | 598 | void f2fs_drop_nlink(struct inode *dir, struct inode *inode, struct page *page) |
| 599 | { |
| 600 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| 601 | |
| 602 | down_write(&F2FS_I(inode)->i_sem); |
| 603 | |
| 604 | if (S_ISDIR(inode->i_mode)) { |
| 605 | drop_nlink(dir); |
| 606 | if (page) |
| 607 | update_inode(dir, page); |
| 608 | else |
| 609 | update_inode_page(dir); |
| 610 | } |
| 611 | inode->i_ctime = CURRENT_TIME; |
| 612 | |
| 613 | drop_nlink(inode); |
| 614 | if (S_ISDIR(inode->i_mode)) { |
| 615 | drop_nlink(inode); |
| 616 | i_size_write(inode, 0); |
| 617 | } |
| 618 | up_write(&F2FS_I(inode)->i_sem); |
| 619 | update_inode_page(inode); |
| 620 | |
| 621 | if (inode->i_nlink == 0) |
| 622 | add_orphan_inode(sbi, inode->i_ino); |
| 623 | else |
| 624 | release_orphan_inode(sbi); |
| 625 | } |
| 626 | |
Jaegeuk Kim | 0a8165d | 2012-11-29 13:28:09 +0900 | [diff] [blame] | 627 | /* |
arter97 | e1c4204 | 2014-08-06 23:22:50 +0900 | [diff] [blame] | 628 | * It only removes the dentry from the dentry page, corresponding name |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 629 | * entry in name page does not need to be touched during deletion. |
| 630 | */ |
| 631 | void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page, |
Chao Yu | dbeacf0 | 2014-09-24 18:17:04 +0800 | [diff] [blame] | 632 | struct inode *dir, struct inode *inode) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 633 | { |
| 634 | struct f2fs_dentry_block *dentry_blk; |
| 635 | unsigned int bit_pos; |
Namjae Jeon | 457d08e | 2012-12-08 14:54:50 +0900 | [diff] [blame] | 636 | int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len)); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 637 | int i; |
| 638 | |
Chao Yu | 622f28a | 2014-09-24 18:19:10 +0800 | [diff] [blame] | 639 | if (f2fs_has_inline_dentry(dir)) |
| 640 | return f2fs_delete_inline_entry(dentry, page, dir, inode); |
| 641 | |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 642 | lock_page(page); |
Jaegeuk Kim | 3cb5ad1 | 2014-03-18 13:29:07 +0900 | [diff] [blame] | 643 | f2fs_wait_on_page_writeback(page, DATA); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 644 | |
Gu Zheng | 1c3bb97 | 2014-06-27 17:57:04 +0800 | [diff] [blame] | 645 | dentry_blk = page_address(page); |
| 646 | bit_pos = dentry - dentry_blk->dentry; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 647 | for (i = 0; i < slots; i++) |
| 648 | test_and_clear_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap); |
| 649 | |
| 650 | /* Let's check and deallocate this dentry page */ |
| 651 | bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, |
| 652 | NR_DENTRY_IN_BLOCK, |
| 653 | 0); |
| 654 | kunmap(page); /* kunmap - pair of f2fs_find_entry */ |
| 655 | set_page_dirty(page); |
| 656 | |
| 657 | dir->i_ctime = dir->i_mtime = CURRENT_TIME; |
| 658 | |
Chao Yu | dbeacf0 | 2014-09-24 18:17:04 +0800 | [diff] [blame] | 659 | if (inode) |
| 660 | f2fs_drop_nlink(dir, inode, NULL); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 661 | |
| 662 | if (bit_pos == NR_DENTRY_IN_BLOCK) { |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 663 | truncate_hole(dir, page->index, page->index + 1); |
| 664 | clear_page_dirty_for_io(page); |
| 665 | ClearPageUptodate(page); |
Jaegeuk Kim | a7ffdbe | 2014-09-12 15:53:45 -0700 | [diff] [blame] | 666 | inode_dec_dirty_pages(dir); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 667 | } |
Namjae Jeon | 508198b | 2012-12-08 14:54:35 +0900 | [diff] [blame] | 668 | f2fs_put_page(page, 1); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 669 | } |
| 670 | |
| 671 | bool f2fs_empty_dir(struct inode *dir) |
| 672 | { |
| 673 | unsigned long bidx; |
| 674 | struct page *dentry_page; |
| 675 | unsigned int bit_pos; |
Chao Yu | dbeacf0 | 2014-09-24 18:17:04 +0800 | [diff] [blame] | 676 | struct f2fs_dentry_block *dentry_blk; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 677 | unsigned long nblock = dir_blocks(dir); |
| 678 | |
Chao Yu | 622f28a | 2014-09-24 18:19:10 +0800 | [diff] [blame] | 679 | if (f2fs_has_inline_dentry(dir)) |
| 680 | return f2fs_empty_inline_dir(dir); |
| 681 | |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 682 | for (bidx = 0; bidx < nblock; bidx++) { |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 683 | dentry_page = get_lock_data_page(dir, bidx); |
| 684 | if (IS_ERR(dentry_page)) { |
| 685 | if (PTR_ERR(dentry_page) == -ENOENT) |
| 686 | continue; |
| 687 | else |
| 688 | return false; |
| 689 | } |
| 690 | |
Gu Zheng | 1c3bb97 | 2014-06-27 17:57:04 +0800 | [diff] [blame] | 691 | dentry_blk = kmap_atomic(dentry_page); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 692 | if (bidx == 0) |
| 693 | bit_pos = 2; |
| 694 | else |
| 695 | bit_pos = 0; |
| 696 | bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, |
| 697 | NR_DENTRY_IN_BLOCK, |
| 698 | bit_pos); |
Gu Zheng | 1c3bb97 | 2014-06-27 17:57:04 +0800 | [diff] [blame] | 699 | kunmap_atomic(dentry_blk); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 700 | |
| 701 | f2fs_put_page(dentry_page, 1); |
| 702 | |
| 703 | if (bit_pos < NR_DENTRY_IN_BLOCK) |
| 704 | return false; |
| 705 | } |
| 706 | return true; |
| 707 | } |
| 708 | |
Al Viro | 6f7f231 | 2013-05-17 18:02:17 -0400 | [diff] [blame] | 709 | static int f2fs_readdir(struct file *file, struct dir_context *ctx) |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 710 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 711 | struct inode *inode = file_inode(file); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 712 | unsigned long npages = dir_blocks(inode); |
Jaegeuk Kim | 99b072bb | 2013-07-05 17:28:12 +0900 | [diff] [blame] | 713 | unsigned int bit_pos = 0; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 714 | struct f2fs_dentry_block *dentry_blk = NULL; |
| 715 | struct f2fs_dir_entry *de = NULL; |
| 716 | struct page *dentry_page = NULL; |
Chao Yu | 817202d9 | 2014-04-28 17:59:43 +0800 | [diff] [blame] | 717 | struct file_ra_state *ra = &file->f_ra; |
Al Viro | 6f7f231 | 2013-05-17 18:02:17 -0400 | [diff] [blame] | 718 | unsigned int n = ((unsigned long)ctx->pos / NR_DENTRY_IN_BLOCK); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 719 | unsigned char d_type = DT_UNKNOWN; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 720 | |
Chao Yu | 622f28a | 2014-09-24 18:19:10 +0800 | [diff] [blame] | 721 | if (f2fs_has_inline_dentry(inode)) |
| 722 | return f2fs_read_inline_dir(file, ctx); |
| 723 | |
Al Viro | 6f7f231 | 2013-05-17 18:02:17 -0400 | [diff] [blame] | 724 | bit_pos = ((unsigned long)ctx->pos % NR_DENTRY_IN_BLOCK); |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 725 | |
Chao Yu | 817202d9 | 2014-04-28 17:59:43 +0800 | [diff] [blame] | 726 | /* readahead for multi pages of dir */ |
| 727 | if (npages - n > 1 && !ra_has_index(ra, n)) |
| 728 | page_cache_sync_readahead(inode->i_mapping, ra, file, n, |
| 729 | min(npages - n, (pgoff_t)MAX_DIR_RA_PAGES)); |
| 730 | |
Chris Fries | 6c311ec | 2014-01-17 14:44:39 -0600 | [diff] [blame] | 731 | for (; n < npages; n++) { |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 732 | dentry_page = get_lock_data_page(inode, n); |
| 733 | if (IS_ERR(dentry_page)) |
| 734 | continue; |
| 735 | |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 736 | dentry_blk = kmap(dentry_page); |
| 737 | while (bit_pos < NR_DENTRY_IN_BLOCK) { |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 738 | bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, |
| 739 | NR_DENTRY_IN_BLOCK, |
| 740 | bit_pos); |
| 741 | if (bit_pos >= NR_DENTRY_IN_BLOCK) |
| 742 | break; |
| 743 | |
| 744 | de = &dentry_blk->dentry[bit_pos]; |
Al Viro | 6f7f231 | 2013-05-17 18:02:17 -0400 | [diff] [blame] | 745 | if (de->file_type < F2FS_FT_MAX) |
| 746 | d_type = f2fs_filetype_table[de->file_type]; |
| 747 | else |
| 748 | d_type = DT_UNKNOWN; |
| 749 | if (!dir_emit(ctx, |
Jaegeuk Kim | 99b072bb | 2013-07-05 17:28:12 +0900 | [diff] [blame] | 750 | dentry_blk->filename[bit_pos], |
| 751 | le16_to_cpu(de->name_len), |
| 752 | le32_to_cpu(de->ino), d_type)) |
| 753 | goto stop; |
| 754 | |
| 755 | bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len)); |
| 756 | ctx->pos = n * NR_DENTRY_IN_BLOCK + bit_pos; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 757 | } |
| 758 | bit_pos = 0; |
Al Viro | 6f7f231 | 2013-05-17 18:02:17 -0400 | [diff] [blame] | 759 | ctx->pos = (n + 1) * NR_DENTRY_IN_BLOCK; |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 760 | kunmap(dentry_page); |
| 761 | f2fs_put_page(dentry_page, 1); |
| 762 | dentry_page = NULL; |
| 763 | } |
Jaegeuk Kim | 99b072bb | 2013-07-05 17:28:12 +0900 | [diff] [blame] | 764 | stop: |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 765 | if (dentry_page && !IS_ERR(dentry_page)) { |
| 766 | kunmap(dentry_page); |
| 767 | f2fs_put_page(dentry_page, 1); |
| 768 | } |
| 769 | |
| 770 | return 0; |
| 771 | } |
| 772 | |
| 773 | const struct file_operations f2fs_dir_operations = { |
| 774 | .llseek = generic_file_llseek, |
| 775 | .read = generic_read_dir, |
Al Viro | 6f7f231 | 2013-05-17 18:02:17 -0400 | [diff] [blame] | 776 | .iterate = f2fs_readdir, |
Jaegeuk Kim | 6b4ea01 | 2012-11-14 16:59:04 +0900 | [diff] [blame] | 777 | .fsync = f2fs_sync_file, |
| 778 | .unlocked_ioctl = f2fs_ioctl, |
| 779 | }; |