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