4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
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.
12 #include <linux/f2fs_fs.h>
13 #include <linux/buffer_head.h>
14 #include <linux/backing-dev.h>
15 #include <linux/writeback.h>
21 #include <trace/events/f2fs.h>
23 void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync)
25 if (f2fs_inode_dirtied(inode, sync))
28 mark_inode_dirty_sync(inode);
31 void f2fs_set_inode_flags(struct inode *inode)
33 unsigned int flags = F2FS_I(inode)->i_flags;
34 unsigned int new_fl = 0;
36 if (flags & FS_SYNC_FL)
38 if (flags & FS_APPEND_FL)
40 if (flags & FS_IMMUTABLE_FL)
41 new_fl |= S_IMMUTABLE;
42 if (flags & FS_NOATIME_FL)
44 if (flags & FS_DIRSYNC_FL)
46 inode_set_flags(inode, new_fl,
47 S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
50 static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
52 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
53 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
56 old_decode_dev(le32_to_cpu(ri->i_addr[0]));
59 new_decode_dev(le32_to_cpu(ri->i_addr[1]));
63 static bool __written_first_block(struct f2fs_inode *ri)
65 block_t addr = le32_to_cpu(ri->i_addr[0]);
67 if (addr != NEW_ADDR && addr != NULL_ADDR)
72 static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
74 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
75 if (old_valid_dev(inode->i_rdev)) {
77 cpu_to_le32(old_encode_dev(inode->i_rdev));
82 cpu_to_le32(new_encode_dev(inode->i_rdev));
88 static void __recover_inline_status(struct inode *inode, struct page *ipage)
90 void *inline_data = inline_data_addr(ipage);
91 __le32 *start = inline_data;
92 __le32 *end = start + MAX_INLINE_DATA / sizeof(__le32);
96 f2fs_wait_on_page_writeback(ipage, NODE, true);
98 set_inode_flag(inode, FI_DATA_EXIST);
99 set_raw_inline(inode, F2FS_INODE(ipage));
100 set_page_dirty(ipage);
107 static int do_read_inode(struct inode *inode)
109 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
110 struct f2fs_inode_info *fi = F2FS_I(inode);
111 struct page *node_page;
112 struct f2fs_inode *ri;
114 /* Check if ino is within scope */
115 if (check_nid_range(sbi, inode->i_ino)) {
116 f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu",
117 (unsigned long) inode->i_ino);
122 node_page = get_node_page(sbi, inode->i_ino);
123 if (IS_ERR(node_page))
124 return PTR_ERR(node_page);
126 ri = F2FS_INODE(node_page);
128 inode->i_mode = le16_to_cpu(ri->i_mode);
129 i_uid_write(inode, le32_to_cpu(ri->i_uid));
130 i_gid_write(inode, le32_to_cpu(ri->i_gid));
131 set_nlink(inode, le32_to_cpu(ri->i_links));
132 inode->i_size = le64_to_cpu(ri->i_size);
133 inode->i_blocks = SECTOR_FROM_BLOCK(le64_to_cpu(ri->i_blocks) - 1);
135 inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
136 inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
137 inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
138 inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
139 inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
140 inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
141 inode->i_generation = le32_to_cpu(ri->i_generation);
143 fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
144 fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
145 fi->i_flags = le32_to_cpu(ri->i_flags);
147 fi->i_advise = ri->i_advise;
148 fi->i_pino = le32_to_cpu(ri->i_pino);
149 fi->i_dir_level = ri->i_dir_level;
151 if (f2fs_init_extent_tree(inode, &ri->i_ext))
152 set_page_dirty(node_page);
154 get_inline_info(inode, ri);
156 /* check data exist */
157 if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
158 __recover_inline_status(inode, node_page);
160 /* get rdev by using inline_info */
161 __get_inode_rdev(inode, ri);
163 if (__written_first_block(ri))
164 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
166 if (!need_inode_block_update(sbi, inode->i_ino))
167 fi->last_disk_size = inode->i_size;
169 f2fs_put_page(node_page, 1);
171 stat_inc_inline_xattr(inode);
172 stat_inc_inline_inode(inode);
173 stat_inc_inline_dir(inode);
178 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
180 struct f2fs_sb_info *sbi = F2FS_SB(sb);
184 inode = iget_locked(sb, ino);
186 return ERR_PTR(-ENOMEM);
188 if (!(inode->i_state & I_NEW)) {
189 trace_f2fs_iget(inode);
192 if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
195 ret = do_read_inode(inode);
199 if (ino == F2FS_NODE_INO(sbi)) {
200 inode->i_mapping->a_ops = &f2fs_node_aops;
201 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
202 } else if (ino == F2FS_META_INO(sbi)) {
203 inode->i_mapping->a_ops = &f2fs_meta_aops;
204 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
205 } else if (S_ISREG(inode->i_mode)) {
206 inode->i_op = &f2fs_file_inode_operations;
207 inode->i_fop = &f2fs_file_operations;
208 inode->i_mapping->a_ops = &f2fs_dblock_aops;
209 } else if (S_ISDIR(inode->i_mode)) {
210 inode->i_op = &f2fs_dir_inode_operations;
211 inode->i_fop = &f2fs_dir_operations;
212 inode->i_mapping->a_ops = &f2fs_dblock_aops;
213 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
214 } else if (S_ISLNK(inode->i_mode)) {
215 if (f2fs_encrypted_inode(inode))
216 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
218 inode->i_op = &f2fs_symlink_inode_operations;
219 inode_nohighmem(inode);
220 inode->i_mapping->a_ops = &f2fs_dblock_aops;
221 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
222 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
223 inode->i_op = &f2fs_special_inode_operations;
224 init_special_inode(inode, inode->i_mode, inode->i_rdev);
229 f2fs_set_inode_flags(inode);
230 unlock_new_inode(inode);
231 trace_f2fs_iget(inode);
236 trace_f2fs_iget_exit(inode, ret);
240 struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino)
244 inode = f2fs_iget(sb, ino);
246 if (PTR_ERR(inode) == -ENOMEM) {
247 congestion_wait(BLK_RW_ASYNC, HZ/50);
254 int update_inode(struct inode *inode, struct page *node_page)
256 struct f2fs_inode *ri;
257 struct extent_tree *et = F2FS_I(inode)->extent_tree;
259 f2fs_inode_synced(inode);
261 f2fs_wait_on_page_writeback(node_page, NODE, true);
263 ri = F2FS_INODE(node_page);
265 ri->i_mode = cpu_to_le16(inode->i_mode);
266 ri->i_advise = F2FS_I(inode)->i_advise;
267 ri->i_uid = cpu_to_le32(i_uid_read(inode));
268 ri->i_gid = cpu_to_le32(i_gid_read(inode));
269 ri->i_links = cpu_to_le32(inode->i_nlink);
270 ri->i_size = cpu_to_le64(i_size_read(inode));
271 ri->i_blocks = cpu_to_le64(SECTOR_TO_BLOCK(inode->i_blocks) + 1);
274 read_lock(&et->lock);
275 set_raw_extent(&et->largest, &ri->i_ext);
276 read_unlock(&et->lock);
278 memset(&ri->i_ext, 0, sizeof(ri->i_ext));
280 set_raw_inline(inode, ri);
282 ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
283 ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
284 ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
285 ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
286 ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
287 ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
288 ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
289 ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
290 ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
291 ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
292 ri->i_generation = cpu_to_le32(inode->i_generation);
293 ri->i_dir_level = F2FS_I(inode)->i_dir_level;
295 __set_inode_rdev(inode, ri);
296 set_cold_node(inode, node_page);
299 if (inode->i_nlink == 0)
300 clear_inline_node(node_page);
302 return set_page_dirty(node_page);
305 int update_inode_page(struct inode *inode)
307 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
308 struct page *node_page;
311 node_page = get_node_page(sbi, inode->i_ino);
312 if (IS_ERR(node_page)) {
313 int err = PTR_ERR(node_page);
314 if (err == -ENOMEM) {
317 } else if (err != -ENOENT) {
318 f2fs_stop_checkpoint(sbi, false);
322 ret = update_inode(inode, node_page);
323 f2fs_put_page(node_page, 1);
327 int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
329 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
331 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
332 inode->i_ino == F2FS_META_INO(sbi))
335 if (!is_inode_flag_set(inode, FI_DIRTY_INODE))
339 * We need to balance fs here to prevent from producing dirty node pages
340 * during the urgent cleaning time when runing out of free sections.
342 update_inode_page(inode);
343 if (wbc && wbc->nr_to_write)
344 f2fs_balance_fs(sbi, true);
349 * Called at the last iput() if i_nlink is zero
351 void f2fs_evict_inode(struct inode *inode)
353 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
354 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
357 /* some remained atomic pages should discarded */
358 if (f2fs_is_atomic_file(inode))
359 drop_inmem_pages(inode);
361 trace_f2fs_evict_inode(inode);
362 truncate_inode_pages_final(&inode->i_data);
364 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
365 inode->i_ino == F2FS_META_INO(sbi))
368 f2fs_bug_on(sbi, get_dirty_pages(inode));
369 remove_dirty_inode(inode);
371 f2fs_destroy_extent_tree(inode);
373 if (inode->i_nlink || is_bad_inode(inode))
376 dquot_initialize(inode);
378 remove_ino_entry(sbi, inode->i_ino, APPEND_INO);
379 remove_ino_entry(sbi, inode->i_ino, UPDATE_INO);
381 sb_start_intwrite(inode->i_sb);
382 set_inode_flag(inode, FI_NO_ALLOC);
383 i_size_write(inode, 0);
385 if (F2FS_HAS_BLOCKS(inode))
386 err = f2fs_truncate(inode);
388 #ifdef CONFIG_F2FS_FAULT_INJECTION
389 if (time_to_inject(sbi, FAULT_EVICT_INODE)) {
390 f2fs_show_injection_info(FAULT_EVICT_INODE);
396 err = remove_inode_page(inode);
402 /* give more chances, if ENOMEM case */
403 if (err == -ENOMEM) {
409 update_inode_page(inode);
410 dquot_free_inode(inode);
411 sb_end_intwrite(inode->i_sb);
415 stat_dec_inline_xattr(inode);
416 stat_dec_inline_dir(inode);
417 stat_dec_inline_inode(inode);
419 /* ino == 0, if f2fs_new_inode() was failed t*/
421 invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino,
424 invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
425 if (inode->i_nlink) {
426 if (is_inode_flag_set(inode, FI_APPEND_WRITE))
427 add_ino_entry(sbi, inode->i_ino, APPEND_INO);
428 if (is_inode_flag_set(inode, FI_UPDATE_WRITE))
429 add_ino_entry(sbi, inode->i_ino, UPDATE_INO);
431 if (is_inode_flag_set(inode, FI_FREE_NID)) {
432 alloc_nid_failed(sbi, inode->i_ino);
433 clear_inode_flag(inode, FI_FREE_NID);
435 f2fs_bug_on(sbi, err &&
436 !exist_written_data(sbi, inode->i_ino, ORPHAN_INO));
439 fscrypt_put_encryption_info(inode, NULL);
443 /* caller should call f2fs_lock_op() */
444 void handle_failed_inode(struct inode *inode)
446 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
450 * clear nlink of inode in order to release resource of inode
456 * we must call this to avoid inode being remained as dirty, resulting
457 * in a panic when flushing dirty inodes in gdirty_list.
459 update_inode_page(inode);
460 f2fs_inode_synced(inode);
462 /* don't make bad inode, since it becomes a regular file. */
463 unlock_new_inode(inode);
466 * Note: we should add inode to orphan list before f2fs_unlock_op()
467 * so we can prevent losing this orphan when encoutering checkpoint
468 * and following suddenly power-off.
470 get_node_info(sbi, inode->i_ino, &ni);
472 if (ni.blk_addr != NULL_ADDR) {
473 int err = acquire_orphan_inode(sbi);
475 set_sbi_flag(sbi, SBI_NEED_FSCK);
476 f2fs_msg(sbi->sb, KERN_WARNING,
477 "Too many orphan inodes, run fsck to fix.");
479 add_orphan_inode(inode);
481 alloc_nid_done(sbi, inode->i_ino);
483 set_inode_flag(inode, FI_FREE_NID);
488 /* iput will drop the inode object */