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 int do_read_inode(struct inode *inode) 41 { 42 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 43 struct f2fs_inode_info *fi = F2FS_I(inode); 44 struct page *node_page; 45 struct f2fs_node *rn; 46 struct f2fs_inode *ri; 47 48 /* Check if ino is within scope */ 49 if (check_nid_range(sbi, inode->i_ino)) { 50 f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu", 51 (unsigned long) inode->i_ino); 52 return -EINVAL; 53 } 54 55 node_page = get_node_page(sbi, inode->i_ino); 56 if (IS_ERR(node_page)) 57 return PTR_ERR(node_page); 58 59 rn = page_address(node_page); 60 ri = &(rn->i); 61 62 inode->i_mode = le16_to_cpu(ri->i_mode); 63 i_uid_write(inode, le32_to_cpu(ri->i_uid)); 64 i_gid_write(inode, le32_to_cpu(ri->i_gid)); 65 set_nlink(inode, le32_to_cpu(ri->i_links)); 66 inode->i_size = le64_to_cpu(ri->i_size); 67 inode->i_blocks = le64_to_cpu(ri->i_blocks); 68 69 inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime); 70 inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime); 71 inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime); 72 inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec); 73 inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec); 74 inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec); 75 inode->i_generation = le32_to_cpu(ri->i_generation); 76 if (ri->i_addr[0]) 77 inode->i_rdev = old_decode_dev(le32_to_cpu(ri->i_addr[0])); 78 else 79 inode->i_rdev = new_decode_dev(le32_to_cpu(ri->i_addr[1])); 80 81 fi->i_current_depth = le32_to_cpu(ri->i_current_depth); 82 fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid); 83 fi->i_flags = le32_to_cpu(ri->i_flags); 84 fi->flags = 0; 85 fi->i_advise = ri->i_advise; 86 fi->i_pino = le32_to_cpu(ri->i_pino); 87 get_extent_info(&fi->ext, ri->i_ext); 88 f2fs_put_page(node_page, 1); 89 return 0; 90 } 91 92 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) 93 { 94 struct f2fs_sb_info *sbi = F2FS_SB(sb); 95 struct inode *inode; 96 int ret = 0; 97 98 inode = iget_locked(sb, ino); 99 if (!inode) 100 return ERR_PTR(-ENOMEM); 101 102 if (!(inode->i_state & I_NEW)) { 103 trace_f2fs_iget(inode); 104 return inode; 105 } 106 if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi)) 107 goto make_now; 108 109 ret = do_read_inode(inode); 110 if (ret) 111 goto bad_inode; 112 113 if (!sbi->por_doing && inode->i_nlink == 0) { 114 ret = -ENOENT; 115 goto bad_inode; 116 } 117 118 make_now: 119 if (ino == F2FS_NODE_INO(sbi)) { 120 inode->i_mapping->a_ops = &f2fs_node_aops; 121 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 122 } else if (ino == F2FS_META_INO(sbi)) { 123 inode->i_mapping->a_ops = &f2fs_meta_aops; 124 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 125 } else if (S_ISREG(inode->i_mode)) { 126 inode->i_op = &f2fs_file_inode_operations; 127 inode->i_fop = &f2fs_file_operations; 128 inode->i_mapping->a_ops = &f2fs_dblock_aops; 129 } else if (S_ISDIR(inode->i_mode)) { 130 inode->i_op = &f2fs_dir_inode_operations; 131 inode->i_fop = &f2fs_dir_operations; 132 inode->i_mapping->a_ops = &f2fs_dblock_aops; 133 mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER_MOVABLE | 134 __GFP_ZERO); 135 } else if (S_ISLNK(inode->i_mode)) { 136 inode->i_op = &f2fs_symlink_inode_operations; 137 inode->i_mapping->a_ops = &f2fs_dblock_aops; 138 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || 139 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { 140 inode->i_op = &f2fs_special_inode_operations; 141 init_special_inode(inode, inode->i_mode, inode->i_rdev); 142 } else { 143 ret = -EIO; 144 goto bad_inode; 145 } 146 unlock_new_inode(inode); 147 trace_f2fs_iget(inode); 148 return inode; 149 150 bad_inode: 151 iget_failed(inode); 152 trace_f2fs_iget_exit(inode, ret); 153 return ERR_PTR(ret); 154 } 155 156 void update_inode(struct inode *inode, struct page *node_page) 157 { 158 struct f2fs_node *rn; 159 struct f2fs_inode *ri; 160 161 wait_on_page_writeback(node_page); 162 163 rn = page_address(node_page); 164 ri = &(rn->i); 165 166 ri->i_mode = cpu_to_le16(inode->i_mode); 167 ri->i_advise = F2FS_I(inode)->i_advise; 168 ri->i_uid = cpu_to_le32(i_uid_read(inode)); 169 ri->i_gid = cpu_to_le32(i_gid_read(inode)); 170 ri->i_links = cpu_to_le32(inode->i_nlink); 171 ri->i_size = cpu_to_le64(i_size_read(inode)); 172 ri->i_blocks = cpu_to_le64(inode->i_blocks); 173 set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext); 174 175 ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec); 176 ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 177 ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); 178 ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); 179 ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 180 ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); 181 ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth); 182 ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid); 183 ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags); 184 ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino); 185 ri->i_generation = cpu_to_le32(inode->i_generation); 186 187 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 188 if (old_valid_dev(inode->i_rdev)) { 189 ri->i_addr[0] = 190 cpu_to_le32(old_encode_dev(inode->i_rdev)); 191 ri->i_addr[1] = 0; 192 } else { 193 ri->i_addr[0] = 0; 194 ri->i_addr[1] = 195 cpu_to_le32(new_encode_dev(inode->i_rdev)); 196 ri->i_addr[2] = 0; 197 } 198 } 199 200 set_cold_node(inode, node_page); 201 set_page_dirty(node_page); 202 } 203 204 int update_inode_page(struct inode *inode) 205 { 206 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 207 struct page *node_page; 208 209 node_page = get_node_page(sbi, inode->i_ino); 210 if (IS_ERR(node_page)) 211 return PTR_ERR(node_page); 212 213 update_inode(inode, node_page); 214 f2fs_put_page(node_page, 1); 215 return 0; 216 } 217 218 int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) 219 { 220 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 221 int ret, ilock; 222 223 if (inode->i_ino == F2FS_NODE_INO(sbi) || 224 inode->i_ino == F2FS_META_INO(sbi)) 225 return 0; 226 227 if (wbc) 228 f2fs_balance_fs(sbi); 229 230 /* 231 * We need to lock here to prevent from producing dirty node pages 232 * during the urgent cleaning time when runing out of free sections. 233 */ 234 ilock = mutex_lock_op(sbi); 235 ret = update_inode_page(inode); 236 mutex_unlock_op(sbi, ilock); 237 return ret; 238 } 239 240 /* 241 * Called at the last iput() if i_nlink is zero 242 */ 243 void f2fs_evict_inode(struct inode *inode) 244 { 245 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 246 int ilock; 247 248 trace_f2fs_evict_inode(inode); 249 truncate_inode_pages(&inode->i_data, 0); 250 251 if (inode->i_ino == F2FS_NODE_INO(sbi) || 252 inode->i_ino == F2FS_META_INO(sbi)) 253 goto no_delete; 254 255 BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents)); 256 remove_dirty_dir_inode(inode); 257 258 if (inode->i_nlink || is_bad_inode(inode)) 259 goto no_delete; 260 261 sb_start_intwrite(inode->i_sb); 262 set_inode_flag(F2FS_I(inode), FI_NO_ALLOC); 263 i_size_write(inode, 0); 264 265 if (F2FS_HAS_BLOCKS(inode)) 266 f2fs_truncate(inode); 267 268 ilock = mutex_lock_op(sbi); 269 remove_inode_page(inode); 270 mutex_unlock_op(sbi, ilock); 271 272 sb_end_intwrite(inode->i_sb); 273 no_delete: 274 clear_inode(inode); 275 } 276