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_SB(inode->i_sb); 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 return -EINVAL; 82 } 83 84 node_page = get_node_page(sbi, inode->i_ino); 85 if (IS_ERR(node_page)) 86 return PTR_ERR(node_page); 87 88 ri = F2FS_INODE(node_page); 89 90 inode->i_mode = le16_to_cpu(ri->i_mode); 91 i_uid_write(inode, le32_to_cpu(ri->i_uid)); 92 i_gid_write(inode, le32_to_cpu(ri->i_gid)); 93 set_nlink(inode, le32_to_cpu(ri->i_links)); 94 inode->i_size = le64_to_cpu(ri->i_size); 95 inode->i_blocks = le64_to_cpu(ri->i_blocks); 96 97 inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime); 98 inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime); 99 inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime); 100 inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec); 101 inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec); 102 inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec); 103 inode->i_generation = le32_to_cpu(ri->i_generation); 104 105 fi->i_current_depth = le32_to_cpu(ri->i_current_depth); 106 fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid); 107 fi->i_flags = le32_to_cpu(ri->i_flags); 108 fi->flags = 0; 109 fi->i_advise = ri->i_advise; 110 fi->i_pino = le32_to_cpu(ri->i_pino); 111 fi->i_dir_level = ri->i_dir_level; 112 113 get_extent_info(&fi->ext, ri->i_ext); 114 get_inline_info(fi, ri); 115 116 /* get rdev by using inline_info */ 117 __get_inode_rdev(inode, ri); 118 119 f2fs_put_page(node_page, 1); 120 return 0; 121 } 122 123 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) 124 { 125 struct f2fs_sb_info *sbi = F2FS_SB(sb); 126 struct inode *inode; 127 int ret = 0; 128 129 inode = iget_locked(sb, ino); 130 if (!inode) 131 return ERR_PTR(-ENOMEM); 132 133 if (!(inode->i_state & I_NEW)) { 134 trace_f2fs_iget(inode); 135 return inode; 136 } 137 if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi)) 138 goto make_now; 139 140 ret = do_read_inode(inode); 141 if (ret) 142 goto bad_inode; 143 make_now: 144 if (ino == F2FS_NODE_INO(sbi)) { 145 inode->i_mapping->a_ops = &f2fs_node_aops; 146 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 147 } else if (ino == F2FS_META_INO(sbi)) { 148 inode->i_mapping->a_ops = &f2fs_meta_aops; 149 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 150 } else if (S_ISREG(inode->i_mode)) { 151 inode->i_op = &f2fs_file_inode_operations; 152 inode->i_fop = &f2fs_file_operations; 153 inode->i_mapping->a_ops = &f2fs_dblock_aops; 154 } else if (S_ISDIR(inode->i_mode)) { 155 inode->i_op = &f2fs_dir_inode_operations; 156 inode->i_fop = &f2fs_dir_operations; 157 inode->i_mapping->a_ops = &f2fs_dblock_aops; 158 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 159 } else if (S_ISLNK(inode->i_mode)) { 160 inode->i_op = &f2fs_symlink_inode_operations; 161 inode->i_mapping->a_ops = &f2fs_dblock_aops; 162 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || 163 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { 164 inode->i_op = &f2fs_special_inode_operations; 165 init_special_inode(inode, inode->i_mode, inode->i_rdev); 166 } else { 167 ret = -EIO; 168 goto bad_inode; 169 } 170 unlock_new_inode(inode); 171 trace_f2fs_iget(inode); 172 return inode; 173 174 bad_inode: 175 iget_failed(inode); 176 trace_f2fs_iget_exit(inode, ret); 177 return ERR_PTR(ret); 178 } 179 180 void update_inode(struct inode *inode, struct page *node_page) 181 { 182 struct f2fs_inode *ri; 183 184 f2fs_wait_on_page_writeback(node_page, NODE); 185 186 ri = F2FS_INODE(node_page); 187 188 ri->i_mode = cpu_to_le16(inode->i_mode); 189 ri->i_advise = F2FS_I(inode)->i_advise; 190 ri->i_uid = cpu_to_le32(i_uid_read(inode)); 191 ri->i_gid = cpu_to_le32(i_gid_read(inode)); 192 ri->i_links = cpu_to_le32(inode->i_nlink); 193 ri->i_size = cpu_to_le64(i_size_read(inode)); 194 ri->i_blocks = cpu_to_le64(inode->i_blocks); 195 set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext); 196 set_raw_inline(F2FS_I(inode), ri); 197 198 ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec); 199 ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 200 ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); 201 ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); 202 ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 203 ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); 204 ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth); 205 ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid); 206 ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags); 207 ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino); 208 ri->i_generation = cpu_to_le32(inode->i_generation); 209 ri->i_dir_level = F2FS_I(inode)->i_dir_level; 210 211 __set_inode_rdev(inode, ri); 212 set_cold_node(inode, node_page); 213 set_page_dirty(node_page); 214 215 clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); 216 } 217 218 void update_inode_page(struct inode *inode) 219 { 220 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 221 struct page *node_page; 222 retry: 223 node_page = get_node_page(sbi, inode->i_ino); 224 if (IS_ERR(node_page)) { 225 int err = PTR_ERR(node_page); 226 if (err == -ENOMEM) { 227 cond_resched(); 228 goto retry; 229 } else if (err != -ENOENT) { 230 f2fs_stop_checkpoint(sbi); 231 } 232 return; 233 } 234 update_inode(inode, node_page); 235 f2fs_put_page(node_page, 1); 236 } 237 238 int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) 239 { 240 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 241 242 if (inode->i_ino == F2FS_NODE_INO(sbi) || 243 inode->i_ino == F2FS_META_INO(sbi)) 244 return 0; 245 246 if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE)) 247 return 0; 248 249 /* 250 * We need to lock here to prevent from producing dirty node pages 251 * during the urgent cleaning time when runing out of free sections. 252 */ 253 f2fs_lock_op(sbi); 254 update_inode_page(inode); 255 f2fs_unlock_op(sbi); 256 257 if (wbc) 258 f2fs_balance_fs(sbi); 259 260 return 0; 261 } 262 263 /* 264 * Called at the last iput() if i_nlink is zero 265 */ 266 void f2fs_evict_inode(struct inode *inode) 267 { 268 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 269 270 trace_f2fs_evict_inode(inode); 271 truncate_inode_pages_final(&inode->i_data); 272 273 if (inode->i_ino == F2FS_NODE_INO(sbi) || 274 inode->i_ino == F2FS_META_INO(sbi)) 275 goto no_delete; 276 277 f2fs_bug_on(get_dirty_dents(inode)); 278 remove_dirty_dir_inode(inode); 279 280 if (inode->i_nlink || is_bad_inode(inode)) 281 goto no_delete; 282 283 sb_start_intwrite(inode->i_sb); 284 set_inode_flag(F2FS_I(inode), FI_NO_ALLOC); 285 i_size_write(inode, 0); 286 287 if (F2FS_HAS_BLOCKS(inode)) 288 f2fs_truncate(inode); 289 290 f2fs_lock_op(sbi); 291 remove_inode_page(inode); 292 stat_dec_inline_inode(inode); 293 f2fs_unlock_op(sbi); 294 295 sb_end_intwrite(inode->i_sb); 296 no_delete: 297 clear_inode(inode); 298 invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino); 299 } 300