1 /* 2 * fs/f2fs/inode.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 <linux/buffer_head.h> 14 #include <linux/writeback.h> 15 #include <linux/bitops.h> 16 17 #include "f2fs.h" 18 #include "node.h" 19 20 #include <trace/events/f2fs.h> 21 22 void f2fs_set_inode_flags(struct inode *inode) 23 { 24 unsigned int flags = F2FS_I(inode)->i_flags; 25 unsigned int new_fl = 0; 26 27 if (flags & FS_SYNC_FL) 28 new_fl |= S_SYNC; 29 if (flags & FS_APPEND_FL) 30 new_fl |= S_APPEND; 31 if (flags & FS_IMMUTABLE_FL) 32 new_fl |= S_IMMUTABLE; 33 if (flags & FS_NOATIME_FL) 34 new_fl |= S_NOATIME; 35 if (flags & FS_DIRSYNC_FL) 36 new_fl |= S_DIRSYNC; 37 set_mask_bits(&inode->i_flags, 38 S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC, new_fl); 39 } 40 41 static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri) 42 { 43 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || 44 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { 45 if (ri->i_addr[0]) 46 inode->i_rdev = 47 old_decode_dev(le32_to_cpu(ri->i_addr[0])); 48 else 49 inode->i_rdev = 50 new_decode_dev(le32_to_cpu(ri->i_addr[1])); 51 } 52 } 53 54 static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri) 55 { 56 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 57 if (old_valid_dev(inode->i_rdev)) { 58 ri->i_addr[0] = 59 cpu_to_le32(old_encode_dev(inode->i_rdev)); 60 ri->i_addr[1] = 0; 61 } else { 62 ri->i_addr[0] = 0; 63 ri->i_addr[1] = 64 cpu_to_le32(new_encode_dev(inode->i_rdev)); 65 ri->i_addr[2] = 0; 66 } 67 } 68 } 69 70 static int do_read_inode(struct inode *inode) 71 { 72 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 73 struct f2fs_inode_info *fi = F2FS_I(inode); 74 struct page *node_page; 75 struct f2fs_inode *ri; 76 77 /* Check if ino is within scope */ 78 if (check_nid_range(sbi, inode->i_ino)) { 79 f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu", 80 (unsigned long) inode->i_ino); 81 WARN_ON(1); 82 return -EINVAL; 83 } 84 85 node_page = get_node_page(sbi, inode->i_ino); 86 if (IS_ERR(node_page)) 87 return PTR_ERR(node_page); 88 89 ri = F2FS_INODE(node_page); 90 91 inode->i_mode = le16_to_cpu(ri->i_mode); 92 i_uid_write(inode, le32_to_cpu(ri->i_uid)); 93 i_gid_write(inode, le32_to_cpu(ri->i_gid)); 94 set_nlink(inode, le32_to_cpu(ri->i_links)); 95 inode->i_size = le64_to_cpu(ri->i_size); 96 inode->i_blocks = le64_to_cpu(ri->i_blocks); 97 98 inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime); 99 inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime); 100 inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime); 101 inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec); 102 inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec); 103 inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec); 104 inode->i_generation = le32_to_cpu(ri->i_generation); 105 106 fi->i_current_depth = le32_to_cpu(ri->i_current_depth); 107 fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid); 108 fi->i_flags = le32_to_cpu(ri->i_flags); 109 fi->flags = 0; 110 fi->i_advise = ri->i_advise; 111 fi->i_pino = le32_to_cpu(ri->i_pino); 112 fi->i_dir_level = ri->i_dir_level; 113 114 get_extent_info(&fi->ext, ri->i_ext); 115 get_inline_info(fi, ri); 116 117 /* get rdev by using inline_info */ 118 __get_inode_rdev(inode, ri); 119 120 f2fs_put_page(node_page, 1); 121 return 0; 122 } 123 124 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) 125 { 126 struct f2fs_sb_info *sbi = F2FS_SB(sb); 127 struct inode *inode; 128 int ret = 0; 129 130 inode = iget_locked(sb, ino); 131 if (!inode) 132 return ERR_PTR(-ENOMEM); 133 134 if (!(inode->i_state & I_NEW)) { 135 trace_f2fs_iget(inode); 136 return inode; 137 } 138 if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi)) 139 goto make_now; 140 141 ret = do_read_inode(inode); 142 if (ret) 143 goto bad_inode; 144 make_now: 145 if (ino == F2FS_NODE_INO(sbi)) { 146 inode->i_mapping->a_ops = &f2fs_node_aops; 147 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 148 } else if (ino == F2FS_META_INO(sbi)) { 149 inode->i_mapping->a_ops = &f2fs_meta_aops; 150 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 151 } else if (S_ISREG(inode->i_mode)) { 152 inode->i_op = &f2fs_file_inode_operations; 153 inode->i_fop = &f2fs_file_operations; 154 inode->i_mapping->a_ops = &f2fs_dblock_aops; 155 } else if (S_ISDIR(inode->i_mode)) { 156 inode->i_op = &f2fs_dir_inode_operations; 157 inode->i_fop = &f2fs_dir_operations; 158 inode->i_mapping->a_ops = &f2fs_dblock_aops; 159 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 160 } else if (S_ISLNK(inode->i_mode)) { 161 inode->i_op = &f2fs_symlink_inode_operations; 162 inode->i_mapping->a_ops = &f2fs_dblock_aops; 163 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || 164 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { 165 inode->i_op = &f2fs_special_inode_operations; 166 init_special_inode(inode, inode->i_mode, inode->i_rdev); 167 } else { 168 ret = -EIO; 169 goto bad_inode; 170 } 171 unlock_new_inode(inode); 172 trace_f2fs_iget(inode); 173 return inode; 174 175 bad_inode: 176 iget_failed(inode); 177 trace_f2fs_iget_exit(inode, ret); 178 return ERR_PTR(ret); 179 } 180 181 void update_inode(struct inode *inode, struct page *node_page) 182 { 183 struct f2fs_inode *ri; 184 185 f2fs_wait_on_page_writeback(node_page, NODE); 186 187 ri = F2FS_INODE(node_page); 188 189 ri->i_mode = cpu_to_le16(inode->i_mode); 190 ri->i_advise = F2FS_I(inode)->i_advise; 191 ri->i_uid = cpu_to_le32(i_uid_read(inode)); 192 ri->i_gid = cpu_to_le32(i_gid_read(inode)); 193 ri->i_links = cpu_to_le32(inode->i_nlink); 194 ri->i_size = cpu_to_le64(i_size_read(inode)); 195 ri->i_blocks = cpu_to_le64(inode->i_blocks); 196 set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext); 197 set_raw_inline(F2FS_I(inode), ri); 198 199 ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec); 200 ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 201 ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); 202 ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); 203 ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 204 ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); 205 ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth); 206 ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid); 207 ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags); 208 ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino); 209 ri->i_generation = cpu_to_le32(inode->i_generation); 210 ri->i_dir_level = F2FS_I(inode)->i_dir_level; 211 212 __set_inode_rdev(inode, ri); 213 set_cold_node(inode, node_page); 214 set_page_dirty(node_page); 215 216 clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); 217 } 218 219 void update_inode_page(struct inode *inode) 220 { 221 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 222 struct page *node_page; 223 retry: 224 node_page = get_node_page(sbi, inode->i_ino); 225 if (IS_ERR(node_page)) { 226 int err = PTR_ERR(node_page); 227 if (err == -ENOMEM) { 228 cond_resched(); 229 goto retry; 230 } else if (err != -ENOENT) { 231 f2fs_stop_checkpoint(sbi); 232 } 233 return; 234 } 235 update_inode(inode, node_page); 236 f2fs_put_page(node_page, 1); 237 } 238 239 int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) 240 { 241 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 242 243 if (inode->i_ino == F2FS_NODE_INO(sbi) || 244 inode->i_ino == F2FS_META_INO(sbi)) 245 return 0; 246 247 if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE)) 248 return 0; 249 250 /* 251 * We need to lock here to prevent from producing dirty node pages 252 * during the urgent cleaning time when runing out of free sections. 253 */ 254 f2fs_lock_op(sbi); 255 update_inode_page(inode); 256 f2fs_unlock_op(sbi); 257 258 if (wbc) 259 f2fs_balance_fs(sbi); 260 261 return 0; 262 } 263 264 /* 265 * Called at the last iput() if i_nlink is zero 266 */ 267 void f2fs_evict_inode(struct inode *inode) 268 { 269 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 270 nid_t xnid = F2FS_I(inode)->i_xattr_nid; 271 272 /* some remained atomic pages should discarded */ 273 if (f2fs_is_atomic_file(inode) || f2fs_is_volatile_file(inode)) 274 commit_inmem_pages(inode, true); 275 276 trace_f2fs_evict_inode(inode); 277 truncate_inode_pages_final(&inode->i_data); 278 279 if (inode->i_ino == F2FS_NODE_INO(sbi) || 280 inode->i_ino == F2FS_META_INO(sbi)) 281 goto out_clear; 282 283 f2fs_bug_on(sbi, get_dirty_pages(inode)); 284 remove_dirty_dir_inode(inode); 285 286 if (inode->i_nlink || is_bad_inode(inode)) 287 goto no_delete; 288 289 sb_start_intwrite(inode->i_sb); 290 set_inode_flag(F2FS_I(inode), FI_NO_ALLOC); 291 i_size_write(inode, 0); 292 293 if (F2FS_HAS_BLOCKS(inode)) 294 f2fs_truncate(inode); 295 296 f2fs_lock_op(sbi); 297 remove_inode_page(inode); 298 stat_dec_inline_inode(inode); 299 f2fs_unlock_op(sbi); 300 301 sb_end_intwrite(inode->i_sb); 302 no_delete: 303 invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino); 304 if (xnid) 305 invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid); 306 if (is_inode_flag_set(F2FS_I(inode), FI_APPEND_WRITE)) 307 add_dirty_inode(sbi, inode->i_ino, APPEND_INO); 308 if (is_inode_flag_set(F2FS_I(inode), FI_UPDATE_WRITE)) 309 add_dirty_inode(sbi, inode->i_ino, UPDATE_INO); 310 out_clear: 311 clear_inode(inode); 312 } 313 314 /* caller should call f2fs_lock_op() */ 315 void handle_failed_inode(struct inode *inode) 316 { 317 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 318 319 clear_nlink(inode); 320 make_bad_inode(inode); 321 unlock_new_inode(inode); 322 323 i_size_write(inode, 0); 324 if (F2FS_HAS_BLOCKS(inode)) 325 f2fs_truncate(inode); 326 327 remove_inode_page(inode); 328 stat_dec_inline_inode(inode); 329 330 alloc_nid_failed(sbi, inode->i_ino); 331 f2fs_unlock_op(sbi); 332 333 /* iput will drop the inode object */ 334 iput(inode); 335 } 336