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Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001/*
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09002 * fs/f2fs/file.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/stat.h>
14#include <linux/buffer_head.h>
15#include <linux/writeback.h>
Jaegeuk Kimae51fb32013-03-16 11:13:04 +090016#include <linux/blkdev.h>
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090017#include <linux/falloc.h>
18#include <linux/types.h>
Namjae Jeone9750822013-02-04 23:41:41 +090019#include <linux/compat.h>
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090020#include <linux/uaccess.h>
21#include <linux/mount.h>
Jaegeuk Kim7f7670f2014-04-28 18:12:36 +090022#include <linux/pagevec.h>
Andy Shevchenko8da4b8c2016-05-20 17:01:00 -070023#include <linux/uuid.h>
Jaegeuk Kim4dd6f972016-07-08 15:16:47 -070024#include <linux/file.h>
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090025
26#include "f2fs.h"
27#include "node.h"
28#include "segment.h"
29#include "xattr.h"
30#include "acl.h"
Chao Yuc1c1b582015-07-10 18:08:10 +080031#include "gc.h"
Jaegeuk Kimdb9f7c12014-12-17 20:04:08 -080032#include "trace.h"
Namjae Jeona2a4a7e2013-04-20 01:28:40 +090033#include <trace/events/f2fs.h>
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090034
35static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
36 struct vm_fault *vmf)
37{
38 struct page *page = vmf->page;
Al Viro6131ffa2013-02-27 16:59:05 -050039 struct inode *inode = file_inode(vma->vm_file);
Jaegeuk Kim40813632014-09-02 15:31:18 -070040 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090041 struct dnode_of_data dn;
Gu Zhenge4795562013-09-27 18:08:30 +080042 int err;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090043
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090044 sb_start_pagefault(inode->i_sb);
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -070045
46 f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
Jaegeuk Kimb067ba12014-08-07 16:32:25 -070047
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090048 /* block allocation */
Gu Zhenge4795562013-09-27 18:08:30 +080049 f2fs_lock_op(sbi);
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -070050 set_new_dnode(&dn, inode, NULL, NULL, 0);
Jaegeuk Kim9ba69cf2014-10-17 20:33:55 -070051 err = f2fs_reserve_block(&dn, page->index);
52 if (err) {
53 f2fs_unlock_op(sbi);
54 goto out;
55 }
56 f2fs_put_dnode(&dn);
57 f2fs_unlock_op(sbi);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090058
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -080059 f2fs_balance_fs(sbi, dn.node_changed);
Jaegeuk Kim2a340762015-12-22 13:23:35 -080060
Namjae Jeon9851e6e2013-04-28 09:04:18 +090061 file_update_time(vma->vm_file);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090062 lock_page(page);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +090063 if (unlikely(page->mapping != inode->i_mapping ||
Namjae Jeon9851e6e2013-04-28 09:04:18 +090064 page_offset(page) > i_size_read(inode) ||
Jaegeuk Kim6bacf522013-12-06 15:00:58 +090065 !PageUptodate(page))) {
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090066 unlock_page(page);
67 err = -EFAULT;
68 goto out;
69 }
70
71 /*
72 * check to see if the page is mapped already (no holes)
73 */
74 if (PageMappedToDisk(page))
Namjae Jeon9851e6e2013-04-28 09:04:18 +090075 goto mapped;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090076
77 /* page is wholly or partially inside EOF */
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +030078 if (((loff_t)(page->index + 1) << PAGE_SHIFT) >
Chao Yu9edcdab2015-09-11 14:43:52 +080079 i_size_read(inode)) {
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090080 unsigned offset;
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +030081 offset = i_size_read(inode) & ~PAGE_MASK;
82 zero_user_segment(page, offset, PAGE_SIZE);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090083 }
84 set_page_dirty(page);
Jaegeuk Kim237c0792016-06-30 18:49:15 -070085 if (!PageUptodate(page))
86 SetPageUptodate(page);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090087
Jaegeuk Kime943a102013-10-25 14:26:31 +090088 trace_f2fs_vm_page_mkwrite(page, DATA);
Namjae Jeon9851e6e2013-04-28 09:04:18 +090089mapped:
90 /* fill the page */
Jaegeuk Kimfec1d652016-01-20 23:43:51 +080091 f2fs_wait_on_page_writeback(page, DATA, false);
Chao Yu08b39fb2015-10-08 13:27:34 +080092
93 /* wait for GCed encrypted page writeback */
94 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
95 f2fs_wait_on_encrypted_page_writeback(sbi, dn.data_blkaddr);
96
Chao Yu5b339122015-07-13 17:43:19 +080097 /* if gced page is attached, don't write to cold segment */
98 clear_cold_data(page);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +090099out:
100 sb_end_pagefault(inode->i_sb);
Jaegeuk Kimd0239e12016-01-08 16:57:48 -0800101 f2fs_update_time(sbi, REQ_TIME);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900102 return block_page_mkwrite_return(err);
103}
104
105static const struct vm_operations_struct f2fs_file_vm_ops = {
Jaegeuk Kim692bb552013-01-17 18:37:41 +0900106 .fault = filemap_fault,
Kirill A. Shutemovf1820362014-04-07 15:37:19 -0700107 .map_pages = filemap_map_pages,
Jaegeuk Kim692bb552013-01-17 18:37:41 +0900108 .page_mkwrite = f2fs_vm_page_mkwrite,
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900109};
110
Jaegeuk Kim354a3392013-06-14 08:52:35 +0900111static int get_parent_ino(struct inode *inode, nid_t *pino)
112{
113 struct dentry *dentry;
114
115 inode = igrab(inode);
116 dentry = d_find_any_alias(inode);
117 iput(inode);
118 if (!dentry)
119 return 0;
120
Jaegeuk Kime7d55452015-04-29 17:02:18 -0700121 if (update_dent_inode(inode, inode, &dentry->d_name)) {
Jaegeuk Kimf0947e52013-07-22 22:12:56 +0900122 dput(dentry);
123 return 0;
124 }
Jaegeuk Kim354a3392013-06-14 08:52:35 +0900125
Jaegeuk Kimf0947e52013-07-22 22:12:56 +0900126 *pino = parent_ino(dentry);
127 dput(dentry);
Jaegeuk Kim354a3392013-06-14 08:52:35 +0900128 return 1;
129}
130
Chao Yu9d1589e2014-08-20 18:37:35 +0800131static inline bool need_do_checkpoint(struct inode *inode)
132{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700133 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Chao Yu9d1589e2014-08-20 18:37:35 +0800134 bool need_cp = false;
135
136 if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
137 need_cp = true;
Jaegeuk Kimbbf156f2016-08-29 18:23:45 -0700138 else if (is_sbi_flag_set(sbi, SBI_NEED_CP))
Jaegeuk Kime7d55452015-04-29 17:02:18 -0700139 need_cp = true;
Chao Yu9d1589e2014-08-20 18:37:35 +0800140 else if (file_wrong_pino(inode))
141 need_cp = true;
142 else if (!space_for_roll_forward(sbi))
143 need_cp = true;
144 else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
145 need_cp = true;
146 else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
147 need_cp = true;
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700148 else if (test_opt(sbi, FASTBOOT))
149 need_cp = true;
Jaegeuk Kima344b9f2014-11-05 20:05:53 -0800150 else if (sbi->active_logs == 2)
151 need_cp = true;
Chao Yu9d1589e2014-08-20 18:37:35 +0800152
153 return need_cp;
154}
155
Changman Lee9c7bb702014-12-08 15:29:40 +0900156static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
157{
158 struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
159 bool ret = false;
160 /* But we need to avoid that there are some inode updates */
161 if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino))
162 ret = true;
163 f2fs_put_page(i, 0);
164 return ret;
165}
166
Changman Lee51455b12014-12-08 15:29:41 +0900167static void try_to_fix_pino(struct inode *inode)
168{
169 struct f2fs_inode_info *fi = F2FS_I(inode);
170 nid_t pino;
171
172 down_write(&fi->i_sem);
173 fi->xattr_ver = 0;
174 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
175 get_parent_ino(inode, &pino)) {
Jaegeuk Kim205b9822016-05-20 09:52:20 -0700176 f2fs_i_pino_write(inode, pino);
Changman Lee51455b12014-12-08 15:29:41 +0900177 file_got_pino(inode);
Changman Lee51455b12014-12-08 15:29:41 +0900178 }
Jaegeuk Kimee6d1822016-05-20 16:32:49 -0700179 up_write(&fi->i_sem);
Changman Lee51455b12014-12-08 15:29:41 +0900180}
181
Jaegeuk Kim608514d2016-04-15 09:43:17 -0700182static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
183 int datasync, bool atomic)
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900184{
185 struct inode *inode = file->f_mapping->host;
Jaegeuk Kim40813632014-09-02 15:31:18 -0700186 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim2403c152014-09-10 14:58:18 -0700187 nid_t ino = inode->i_ino;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900188 int ret = 0;
189 bool need_cp = false;
190 struct writeback_control wbc = {
Jaegeuk Kimc81bf1c2014-03-03 11:28:40 +0900191 .sync_mode = WB_SYNC_ALL,
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900192 .nr_to_write = LONG_MAX,
193 .for_reclaim = 0,
194 };
195
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900196 if (unlikely(f2fs_readonly(inode->i_sb)))
Namjae Jeon1fa95b02012-12-01 10:56:01 +0900197 return 0;
198
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900199 trace_f2fs_sync_file_enter(inode);
Jaegeuk Kimea1aa122014-07-24 19:11:43 -0700200
201 /* if fdatasync is triggered, let's do in-place-update */
Jaegeuk Kimc46a1552015-12-31 13:49:17 -0800202 if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
Jaegeuk Kim91942322016-05-20 10:13:22 -0700203 set_inode_flag(inode, FI_NEED_IPU);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900204 ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
Jaegeuk Kim91942322016-05-20 10:13:22 -0700205 clear_inode_flag(inode, FI_NEED_IPU);
Jaegeuk Kimc1ce1b02014-09-10 16:53:02 -0700206
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900207 if (ret) {
208 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900209 return ret;
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900210 }
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900211
Changman Lee9c7bb702014-12-08 15:29:40 +0900212 /* if the inode is dirty, let's recover all the time */
Jaegeuk Kim26de9b12016-05-20 20:42:37 -0700213 if (!datasync && !f2fs_skip_inode_update(inode)) {
Jaegeuk Kim2286c022015-08-15 21:51:05 -0700214 f2fs_write_inode(inode, NULL);
Changman Lee9c7bb702014-12-08 15:29:40 +0900215 goto go_write;
216 }
217
Jaegeuk Kim6d99ba412014-07-24 19:08:02 -0700218 /*
219 * if there is no written data, don't waste time to write recovery info.
220 */
Jaegeuk Kim91942322016-05-20 10:13:22 -0700221 if (!is_inode_flag_set(inode, FI_APPEND_WRITE) &&
Jaegeuk Kim2403c152014-09-10 14:58:18 -0700222 !exist_written_data(sbi, ino, APPEND_INO)) {
Jaegeuk Kim19c9c462014-09-10 15:04:03 -0700223
Changman Lee9c7bb702014-12-08 15:29:40 +0900224 /* it may call write_inode just prior to fsync */
225 if (need_inode_page_update(sbi, ino))
Jaegeuk Kim19c9c462014-09-10 15:04:03 -0700226 goto go_write;
Jaegeuk Kim19c9c462014-09-10 15:04:03 -0700227
Jaegeuk Kim91942322016-05-20 10:13:22 -0700228 if (is_inode_flag_set(inode, FI_UPDATE_WRITE) ||
Jaegeuk Kim2403c152014-09-10 14:58:18 -0700229 exist_written_data(sbi, ino, UPDATE_INO))
Jaegeuk Kim6d99ba412014-07-24 19:08:02 -0700230 goto flush_out;
231 goto out;
232 }
Jaegeuk Kim19c9c462014-09-10 15:04:03 -0700233go_write:
Jaegeuk Kime5d23852013-07-03 10:55:52 +0900234 /*
235 * Both of fdatasync() and fsync() are able to be recovered from
236 * sudden-power-off.
237 */
Jaegeuk Kim91942322016-05-20 10:13:22 -0700238 down_read(&F2FS_I(inode)->i_sem);
Chao Yu9d1589e2014-08-20 18:37:35 +0800239 need_cp = need_do_checkpoint(inode);
Jaegeuk Kim91942322016-05-20 10:13:22 -0700240 up_read(&F2FS_I(inode)->i_sem);
Jaegeuk Kimd928bfb2014-03-20 19:10:08 +0900241
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900242 if (need_cp) {
243 /* all the dirty node pages should be flushed for POR */
244 ret = f2fs_sync_fs(inode->i_sb, 1);
Jaegeuk Kimd928bfb2014-03-20 19:10:08 +0900245
Changman Lee51455b12014-12-08 15:29:41 +0900246 /*
247 * We've secured consistency through sync_fs. Following pino
248 * will be used only for fsynced inodes after checkpoint.
249 */
250 try_to_fix_pino(inode);
Jaegeuk Kim91942322016-05-20 10:13:22 -0700251 clear_inode_flag(inode, FI_APPEND_WRITE);
252 clear_inode_flag(inode, FI_UPDATE_WRITE);
Changman Lee51455b12014-12-08 15:29:41 +0900253 goto out;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900254 }
Changman Lee51455b12014-12-08 15:29:41 +0900255sync_nodes:
Jaegeuk Kim26de9b12016-05-20 20:42:37 -0700256 ret = fsync_node_pages(sbi, inode, &wbc, atomic);
Jaegeuk Kimc267ec12016-04-15 09:25:04 -0700257 if (ret)
258 goto out;
Changman Lee51455b12014-12-08 15:29:41 +0900259
Jaegeuk Kim871f5992015-01-09 16:27:17 -0800260 /* if cp_error was enabled, we should avoid infinite loop */
Chao Yu6d5a1492015-12-24 18:04:56 +0800261 if (unlikely(f2fs_cp_error(sbi))) {
262 ret = -EIO;
Jaegeuk Kim871f5992015-01-09 16:27:17 -0800263 goto out;
Chao Yu6d5a1492015-12-24 18:04:56 +0800264 }
Jaegeuk Kim871f5992015-01-09 16:27:17 -0800265
Changman Lee51455b12014-12-08 15:29:41 +0900266 if (need_inode_block_update(sbi, ino)) {
Jaegeuk Kimb56ab832016-06-30 19:09:37 -0700267 f2fs_mark_inode_dirty_sync(inode);
Changman Lee51455b12014-12-08 15:29:41 +0900268 f2fs_write_inode(inode, NULL);
269 goto sync_nodes;
270 }
271
272 ret = wait_on_node_pages_writeback(sbi, ino);
273 if (ret)
274 goto out;
275
276 /* once recovery info is written, don't need to tack this */
Chao Yua49324f2015-12-15 13:29:47 +0800277 remove_ino_entry(sbi, ino, APPEND_INO);
Jaegeuk Kim91942322016-05-20 10:13:22 -0700278 clear_inode_flag(inode, FI_APPEND_WRITE);
Changman Lee51455b12014-12-08 15:29:41 +0900279flush_out:
Chao Yua49324f2015-12-15 13:29:47 +0800280 remove_ino_entry(sbi, ino, UPDATE_INO);
Jaegeuk Kim91942322016-05-20 10:13:22 -0700281 clear_inode_flag(inode, FI_UPDATE_WRITE);
Changman Lee51455b12014-12-08 15:29:41 +0900282 ret = f2fs_issue_flush(sbi);
Jaegeuk Kimd0239e12016-01-08 16:57:48 -0800283 f2fs_update_time(sbi, REQ_TIME);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900284out:
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900285 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
Jaegeuk Kim05ca3632015-04-23 14:38:15 -0700286 f2fs_trace_ios(NULL, 1);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900287 return ret;
288}
289
Jaegeuk Kim608514d2016-04-15 09:43:17 -0700290int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
291{
292 return f2fs_do_sync_file(file, start, end, datasync, false);
293}
294
Jaegeuk Kim7f7670f2014-04-28 18:12:36 +0900295static pgoff_t __get_first_dirty_index(struct address_space *mapping,
296 pgoff_t pgofs, int whence)
297{
298 struct pagevec pvec;
299 int nr_pages;
300
301 if (whence != SEEK_DATA)
302 return 0;
303
304 /* find first dirty page index */
305 pagevec_init(&pvec, 0);
Jaegeuk Kim65b85cc2014-07-30 17:25:54 -0700306 nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
307 PAGECACHE_TAG_DIRTY, 1);
Chao Yu80dd9c02016-02-24 17:20:44 +0800308 pgofs = nr_pages ? pvec.pages[0]->index : ULONG_MAX;
Jaegeuk Kim7f7670f2014-04-28 18:12:36 +0900309 pagevec_release(&pvec);
310 return pgofs;
311}
312
313static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs,
314 int whence)
315{
316 switch (whence) {
317 case SEEK_DATA:
318 if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
319 (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR))
320 return true;
321 break;
322 case SEEK_HOLE:
323 if (blkaddr == NULL_ADDR)
324 return true;
325 break;
326 }
327 return false;
328}
329
Chao Yu267378d2014-04-23 14:10:24 +0800330static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
331{
332 struct inode *inode = file->f_mapping->host;
333 loff_t maxbytes = inode->i_sb->s_maxbytes;
334 struct dnode_of_data dn;
Jaegeuk Kim7f7670f2014-04-28 18:12:36 +0900335 pgoff_t pgofs, end_offset, dirty;
336 loff_t data_ofs = offset;
337 loff_t isize;
Chao Yu267378d2014-04-23 14:10:24 +0800338 int err = 0;
339
Al Viro59551022016-01-22 15:40:57 -0500340 inode_lock(inode);
Chao Yu267378d2014-04-23 14:10:24 +0800341
342 isize = i_size_read(inode);
343 if (offset >= isize)
344 goto fail;
345
346 /* handle inline data case */
Chao Yu622f28a2014-09-24 18:19:10 +0800347 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
Chao Yu267378d2014-04-23 14:10:24 +0800348 if (whence == SEEK_HOLE)
349 data_ofs = isize;
350 goto found;
351 }
352
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300353 pgofs = (pgoff_t)(offset >> PAGE_SHIFT);
Chao Yu267378d2014-04-23 14:10:24 +0800354
Jaegeuk Kim7f7670f2014-04-28 18:12:36 +0900355 dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
356
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300357 for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
Chao Yu267378d2014-04-23 14:10:24 +0800358 set_new_dnode(&dn, inode, NULL, NULL, 0);
Jaegeuk Kimac6f1992016-06-16 17:03:23 -0700359 err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);
Chao Yu267378d2014-04-23 14:10:24 +0800360 if (err && err != -ENOENT) {
361 goto fail;
362 } else if (err == -ENOENT) {
arter97e1c42042014-08-06 23:22:50 +0900363 /* direct node does not exists */
Chao Yu267378d2014-04-23 14:10:24 +0800364 if (whence == SEEK_DATA) {
Chao Yu3cf45742016-01-26 15:40:44 +0800365 pgofs = get_next_page_offset(&dn, pgofs);
Chao Yu267378d2014-04-23 14:10:24 +0800366 continue;
367 } else {
368 goto found;
369 }
370 }
371
Chao Yu81ca7352016-01-26 15:39:35 +0800372 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
Chao Yu267378d2014-04-23 14:10:24 +0800373
374 /* find data/hole in dnode block */
375 for (; dn.ofs_in_node < end_offset;
376 dn.ofs_in_node++, pgofs++,
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300377 data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
Chao Yu267378d2014-04-23 14:10:24 +0800378 block_t blkaddr;
379 blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
380
Jaegeuk Kim7f7670f2014-04-28 18:12:36 +0900381 if (__found_offset(blkaddr, dirty, pgofs, whence)) {
Chao Yu267378d2014-04-23 14:10:24 +0800382 f2fs_put_dnode(&dn);
383 goto found;
384 }
385 }
386 f2fs_put_dnode(&dn);
387 }
388
389 if (whence == SEEK_DATA)
390 goto fail;
Chao Yu267378d2014-04-23 14:10:24 +0800391found:
Jaegeuk Kimfe369bc2014-04-28 17:02:48 +0900392 if (whence == SEEK_HOLE && data_ofs > isize)
393 data_ofs = isize;
Al Viro59551022016-01-22 15:40:57 -0500394 inode_unlock(inode);
Chao Yu267378d2014-04-23 14:10:24 +0800395 return vfs_setpos(file, data_ofs, maxbytes);
396fail:
Al Viro59551022016-01-22 15:40:57 -0500397 inode_unlock(inode);
Chao Yu267378d2014-04-23 14:10:24 +0800398 return -ENXIO;
399}
400
401static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
402{
403 struct inode *inode = file->f_mapping->host;
404 loff_t maxbytes = inode->i_sb->s_maxbytes;
405
406 switch (whence) {
407 case SEEK_SET:
408 case SEEK_CUR:
409 case SEEK_END:
410 return generic_file_llseek_size(file, offset, whence,
411 maxbytes, i_size_read(inode));
412 case SEEK_DATA:
413 case SEEK_HOLE:
Jaegeuk Kim0b4c5afde2014-09-08 10:59:43 -0700414 if (offset < 0)
415 return -ENXIO;
Chao Yu267378d2014-04-23 14:10:24 +0800416 return f2fs_seek_block(file, offset, whence);
417 }
418
419 return -EINVAL;
420}
421
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900422static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
423{
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700424 struct inode *inode = file_inode(file);
Jaegeuk Kimb9d777b2015-12-22 11:09:35 -0800425 int err;
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700426
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700427 if (f2fs_encrypted_inode(inode)) {
Jaegeuk Kim0b81d072015-05-15 16:26:10 -0700428 err = fscrypt_get_encryption_info(inode);
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700429 if (err)
430 return 0;
Chao Yuae108662016-02-14 18:58:35 +0800431 if (!f2fs_encrypted_inode(inode))
432 return -ENOKEY;
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700433 }
434
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700435 /* we don't need to use inline_data strictly */
Jaegeuk Kimb9d777b2015-12-22 11:09:35 -0800436 err = f2fs_convert_inline_inode(inode);
437 if (err)
438 return err;
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700439
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900440 file_accessed(file);
441 vma->vm_ops = &f2fs_file_vm_ops;
442 return 0;
443}
444
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700445static int f2fs_file_open(struct inode *inode, struct file *filp)
446{
447 int ret = generic_file_open(inode, filp);
Jaegeuk Kim33b13952016-04-11 15:15:38 -0700448 struct dentry *dir;
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700449
450 if (!ret && f2fs_encrypted_inode(inode)) {
Jaegeuk Kim0b81d072015-05-15 16:26:10 -0700451 ret = fscrypt_get_encryption_info(inode);
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700452 if (ret)
Chao Yuae108662016-02-14 18:58:35 +0800453 return -EACCES;
Jaegeuk Kim0b81d072015-05-15 16:26:10 -0700454 if (!fscrypt_has_encryption_key(inode))
Chao Yuae108662016-02-14 18:58:35 +0800455 return -ENOKEY;
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700456 }
Jaegeuk Kim33b13952016-04-11 15:15:38 -0700457 dir = dget_parent(file_dentry(filp));
458 if (f2fs_encrypted_inode(d_inode(dir)) &&
459 !fscrypt_has_permitted_context(d_inode(dir), inode)) {
460 dput(dir);
Jaegeuk Kim8074bb52016-02-23 09:21:37 -0800461 return -EPERM;
Jaegeuk Kim33b13952016-04-11 15:15:38 -0700462 }
463 dput(dir);
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700464 return ret;
465}
466
Jaegeuk Kimb292dcab2013-05-22 08:02:02 +0900467int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900468{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700469 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900470 struct f2fs_node *raw_node;
Chao Yu19b2c302015-08-26 20:34:48 +0800471 int nr_free = 0, ofs = dn->ofs_in_node, len = count;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900472 __le32 *addr;
473
Gu Zheng45590712013-07-15 17:57:38 +0800474 raw_node = F2FS_NODE(dn->node_page);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900475 addr = blkaddr_in_node(raw_node) + ofs;
476
Chris Fries6c311ec2014-01-17 14:44:39 -0600477 for (; count > 0; count--, addr++, dn->ofs_in_node++) {
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900478 block_t blkaddr = le32_to_cpu(*addr);
479 if (blkaddr == NULL_ADDR)
480 continue;
481
Jaegeuk Kime1509cf2014-12-30 22:57:55 -0800482 dn->data_blkaddr = NULL_ADDR;
Chao Yu216a6202015-03-19 19:23:32 +0800483 set_data_blkaddr(dn);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900484 invalidate_blocks(sbi, blkaddr);
Jaegeuk Kim3c6c2be2015-03-17 17:16:35 -0700485 if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))
Jaegeuk Kim91942322016-05-20 10:13:22 -0700486 clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900487 nr_free++;
488 }
Chao Yu19b2c302015-08-26 20:34:48 +0800489
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900490 if (nr_free) {
Chao Yu19b2c302015-08-26 20:34:48 +0800491 pgoff_t fofs;
492 /*
493 * once we invalidate valid blkaddr in range [ofs, ofs + count],
494 * we will invalidate all blkaddr in the whole range.
495 */
496 fofs = start_bidx_of_node(ofs_of_node(dn->node_page),
Chao Yu81ca7352016-01-26 15:39:35 +0800497 dn->inode) + ofs;
Chao Yu19b2c302015-08-26 20:34:48 +0800498 f2fs_update_extent_cache_range(dn, fofs, 0, len);
Namjae Jeond7cc9502013-06-08 21:25:40 +0900499 dec_valid_block_count(sbi, dn->inode, nr_free);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900500 }
501 dn->ofs_in_node = ofs;
Namjae Jeon51dd6242013-04-20 01:28:52 +0900502
Jaegeuk Kimd0239e12016-01-08 16:57:48 -0800503 f2fs_update_time(sbi, REQ_TIME);
Namjae Jeon51dd6242013-04-20 01:28:52 +0900504 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
505 dn->ofs_in_node, nr_free);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900506 return nr_free;
507}
508
509void truncate_data_blocks(struct dnode_of_data *dn)
510{
511 truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
512}
513
Chao Yu0bfcfcc2015-03-10 13:16:25 +0800514static int truncate_partial_data_page(struct inode *inode, u64 from,
Jaegeuk Kim43f3eae2015-04-30 17:00:33 -0700515 bool cache_only)
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900516{
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300517 unsigned offset = from & (PAGE_SIZE - 1);
518 pgoff_t index = from >> PAGE_SHIFT;
Jaegeuk Kim43f3eae2015-04-30 17:00:33 -0700519 struct address_space *mapping = inode->i_mapping;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900520 struct page *page;
521
Jaegeuk Kim43f3eae2015-04-30 17:00:33 -0700522 if (!offset && !cache_only)
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700523 return 0;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900524
Jaegeuk Kim43f3eae2015-04-30 17:00:33 -0700525 if (cache_only) {
Jaegeuk Kim34b5d5c2016-09-06 15:55:54 -0700526 page = find_lock_page(mapping, index);
Jaegeuk Kim43f3eae2015-04-30 17:00:33 -0700527 if (page && PageUptodate(page))
528 goto truncate_out;
529 f2fs_put_page(page, 1);
530 return 0;
531 }
532
Jaegeuk Kima56c7c62015-10-09 15:11:38 -0700533 page = get_lock_data_page(inode, index, true);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900534 if (IS_ERR(page))
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700535 return 0;
Jaegeuk Kim43f3eae2015-04-30 17:00:33 -0700536truncate_out:
Jaegeuk Kimfec1d652016-01-20 23:43:51 +0800537 f2fs_wait_on_page_writeback(page, DATA, true);
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300538 zero_user(page, offset, PAGE_SIZE - offset);
Jaegeuk Kim0b81d072015-05-15 16:26:10 -0700539 if (!cache_only || !f2fs_encrypted_inode(inode) ||
540 !S_ISREG(inode->i_mode))
Chao Yu0bfcfcc2015-03-10 13:16:25 +0800541 set_page_dirty(page);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900542 f2fs_put_page(page, 1);
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700543 return 0;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900544}
545
Jaegeuk Kim764aa3e2014-08-14 16:32:54 -0700546int truncate_blocks(struct inode *inode, u64 from, bool lock)
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900547{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700548 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900549 unsigned int blocksize = inode->i_sb->s_blocksize;
550 struct dnode_of_data dn;
551 pgoff_t free_from;
Huajun Li9ffe0fb2013-11-10 23:13:20 +0800552 int count = 0, err = 0;
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700553 struct page *ipage;
Chao Yu0bfcfcc2015-03-10 13:16:25 +0800554 bool truncate_page = false;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900555
Namjae Jeon51dd6242013-04-20 01:28:52 +0900556 trace_f2fs_truncate_blocks_enter(inode, from);
557
Jaegeuk Kimf7ef9b82015-02-09 12:02:44 -0800558 free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900559
Chao Yu09210c92016-05-05 19:13:03 +0800560 if (free_from >= sbi->max_file_blocks)
561 goto free_partial;
562
Jaegeuk Kim764aa3e2014-08-14 16:32:54 -0700563 if (lock)
564 f2fs_lock_op(sbi);
Huajun Li9ffe0fb2013-11-10 23:13:20 +0800565
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700566 ipage = get_node_page(sbi, inode->i_ino);
567 if (IS_ERR(ipage)) {
568 err = PTR_ERR(ipage);
569 goto out;
570 }
571
572 if (f2fs_has_inline_data(inode)) {
Chao Yu0bfcfcc2015-03-10 13:16:25 +0800573 if (truncate_inline_inode(ipage, from))
574 set_page_dirty(ipage);
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700575 f2fs_put_page(ipage, 1);
Chao Yu0bfcfcc2015-03-10 13:16:25 +0800576 truncate_page = true;
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700577 goto out;
578 }
579
580 set_new_dnode(&dn, inode, ipage, NULL, 0);
Jaegeuk Kim79344ef2016-05-06 16:19:43 -0700581 err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900582 if (err) {
583 if (err == -ENOENT)
584 goto free_next;
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700585 goto out;
Jaegeuk Kim1ce86bf2014-10-15 10:24:34 -0700586 }
587
Chao Yu81ca7352016-01-26 15:39:35 +0800588 count = ADDRS_PER_PAGE(dn.node_page, inode);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900589
590 count -= dn.ofs_in_node;
Jaegeuk Kim9850cf42014-09-02 15:52:58 -0700591 f2fs_bug_on(sbi, count < 0);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900592
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900593 if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
594 truncate_data_blocks_range(&dn, count);
595 free_from += count;
596 }
597
598 f2fs_put_dnode(&dn);
599free_next:
600 err = truncate_inode_blocks(inode, free_from);
Jaegeuk Kim764d2c82014-11-11 11:01:01 -0800601out:
602 if (lock)
603 f2fs_unlock_op(sbi);
Chao Yu09210c92016-05-05 19:13:03 +0800604free_partial:
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -0700605 /* lastly zero out the first data page */
606 if (!err)
Chao Yu0bfcfcc2015-03-10 13:16:25 +0800607 err = truncate_partial_data_page(inode, from, truncate_page);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900608
Namjae Jeon51dd6242013-04-20 01:28:52 +0900609 trace_f2fs_truncate_blocks_exit(inode, err);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900610 return err;
611}
612
Jaegeuk Kim9a449e92016-06-02 13:49:38 -0700613int f2fs_truncate(struct inode *inode)
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900614{
Chao Yub0154892015-08-24 17:39:42 +0800615 int err;
616
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900617 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
618 S_ISLNK(inode->i_mode)))
Chao Yub0154892015-08-24 17:39:42 +0800619 return 0;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900620
Namjae Jeon51dd6242013-04-20 01:28:52 +0900621 trace_f2fs_truncate(inode);
622
Jaegeuk Kim92dffd02014-11-11 14:10:01 -0800623 /* we should check inline_data size */
Jaegeuk Kimb9d777b2015-12-22 11:09:35 -0800624 if (!f2fs_may_inline_data(inode)) {
Chao Yub0154892015-08-24 17:39:42 +0800625 err = f2fs_convert_inline_inode(inode);
626 if (err)
627 return err;
Jaegeuk Kim92dffd02014-11-11 14:10:01 -0800628 }
629
Jaegeuk Kim9a449e92016-06-02 13:49:38 -0700630 err = truncate_blocks(inode, i_size_read(inode), true);
Chao Yub0154892015-08-24 17:39:42 +0800631 if (err)
632 return err;
633
Deepa Dinamani078cd822016-09-14 07:48:04 -0700634 inode->i_mtime = inode->i_ctime = current_time(inode);
Jaegeuk Kimb56ab832016-06-30 19:09:37 -0700635 f2fs_mark_inode_dirty_sync(inode);
Chao Yub0154892015-08-24 17:39:42 +0800636 return 0;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900637}
638
Jaegeuk Kim2d4d9fb52013-06-07 16:33:07 +0900639int f2fs_getattr(struct vfsmount *mnt,
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900640 struct dentry *dentry, struct kstat *stat)
641{
David Howells2b0143b2015-03-17 22:25:59 +0000642 struct inode *inode = d_inode(dentry);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900643 generic_fillattr(inode, stat);
644 stat->blocks <<= 3;
645 return 0;
646}
647
648#ifdef CONFIG_F2FS_FS_POSIX_ACL
649static void __setattr_copy(struct inode *inode, const struct iattr *attr)
650{
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900651 unsigned int ia_valid = attr->ia_valid;
652
653 if (ia_valid & ATTR_UID)
654 inode->i_uid = attr->ia_uid;
655 if (ia_valid & ATTR_GID)
656 inode->i_gid = attr->ia_gid;
657 if (ia_valid & ATTR_ATIME)
658 inode->i_atime = timespec_trunc(attr->ia_atime,
659 inode->i_sb->s_time_gran);
660 if (ia_valid & ATTR_MTIME)
661 inode->i_mtime = timespec_trunc(attr->ia_mtime,
662 inode->i_sb->s_time_gran);
663 if (ia_valid & ATTR_CTIME)
664 inode->i_ctime = timespec_trunc(attr->ia_ctime,
665 inode->i_sb->s_time_gran);
666 if (ia_valid & ATTR_MODE) {
667 umode_t mode = attr->ia_mode;
668
669 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
670 mode &= ~S_ISGID;
Jaegeuk Kim91942322016-05-20 10:13:22 -0700671 set_acl_inode(inode, mode);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900672 }
673}
674#else
675#define __setattr_copy setattr_copy
676#endif
677
678int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
679{
David Howells2b0143b2015-03-17 22:25:59 +0000680 struct inode *inode = d_inode(dentry);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900681 int err;
682
Jan Kara31051c82016-05-26 16:55:18 +0200683 err = setattr_prepare(dentry, attr);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900684 if (err)
685 return err;
686
Chao Yu09db6a22014-09-15 18:02:09 +0800687 if (attr->ia_valid & ATTR_SIZE) {
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700688 if (f2fs_encrypted_inode(inode) &&
Jaegeuk Kim0b81d072015-05-15 16:26:10 -0700689 fscrypt_get_encryption_info(inode))
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -0700690 return -EACCES;
691
Chao Yu3c454142015-06-05 18:34:02 +0800692 if (attr->ia_size <= i_size_read(inode)) {
Chao Yu09db6a22014-09-15 18:02:09 +0800693 truncate_setsize(inode, attr->ia_size);
Jaegeuk Kim9a449e92016-06-02 13:49:38 -0700694 err = f2fs_truncate(inode);
Chao Yub0154892015-08-24 17:39:42 +0800695 if (err)
696 return err;
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -0800697 f2fs_balance_fs(F2FS_I_SB(inode), true);
Chao Yu09db6a22014-09-15 18:02:09 +0800698 } else {
699 /*
Chao Yu3c454142015-06-05 18:34:02 +0800700 * do not trim all blocks after i_size if target size is
701 * larger than i_size.
Chao Yu09db6a22014-09-15 18:02:09 +0800702 */
Chao Yu3c454142015-06-05 18:34:02 +0800703 truncate_setsize(inode, attr->ia_size);
Chao Yu0cab80e2015-12-01 11:36:16 +0800704
705 /* should convert inline inode here */
Jaegeuk Kimb9d777b2015-12-22 11:09:35 -0800706 if (!f2fs_may_inline_data(inode)) {
Chao Yu0cab80e2015-12-01 11:36:16 +0800707 err = f2fs_convert_inline_inode(inode);
708 if (err)
709 return err;
710 }
Deepa Dinamani078cd822016-09-14 07:48:04 -0700711 inode->i_mtime = inode->i_ctime = current_time(inode);
Chao Yu09db6a22014-09-15 18:02:09 +0800712 }
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900713 }
714
715 __setattr_copy(inode, attr);
716
717 if (attr->ia_valid & ATTR_MODE) {
Christoph Hellwiga6dda0e2013-12-20 05:16:45 -0800718 err = posix_acl_chmod(inode, get_inode_mode(inode));
Jaegeuk Kim91942322016-05-20 10:13:22 -0700719 if (err || is_inode_flag_set(inode, FI_ACL_MODE)) {
720 inode->i_mode = F2FS_I(inode)->i_acl_mode;
721 clear_inode_flag(inode, FI_ACL_MODE);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900722 }
723 }
724
Jaegeuk Kimb56ab832016-06-30 19:09:37 -0700725 f2fs_mark_inode_dirty_sync(inode);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900726 return err;
727}
728
729const struct inode_operations f2fs_file_inode_operations = {
730 .getattr = f2fs_getattr,
731 .setattr = f2fs_setattr,
732 .get_acl = f2fs_get_acl,
Christoph Hellwiga6dda0e2013-12-20 05:16:45 -0800733 .set_acl = f2fs_set_acl,
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900734#ifdef CONFIG_F2FS_FS_XATTR
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900735 .listxattr = f2fs_listxattr,
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900736#endif
Jaegeuk Kim9ab70132014-06-08 04:30:14 +0900737 .fiemap = f2fs_fiemap,
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900738};
739
Chao Yu63943282015-08-07 18:36:06 +0800740static int fill_zero(struct inode *inode, pgoff_t index,
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900741 loff_t start, loff_t len)
742{
Jaegeuk Kim40813632014-09-02 15:31:18 -0700743 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900744 struct page *page;
745
746 if (!len)
Chao Yu63943282015-08-07 18:36:06 +0800747 return 0;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900748
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -0800749 f2fs_balance_fs(sbi, true);
Jaegeuk Kimbd43df02013-01-25 18:33:41 +0900750
Gu Zhenge4795562013-09-27 18:08:30 +0800751 f2fs_lock_op(sbi);
Jaegeuk Kim64aa7ed2013-05-20 09:55:50 +0900752 page = get_new_data_page(inode, NULL, index, false);
Gu Zhenge4795562013-09-27 18:08:30 +0800753 f2fs_unlock_op(sbi);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900754
Chao Yu63943282015-08-07 18:36:06 +0800755 if (IS_ERR(page))
756 return PTR_ERR(page);
757
Jaegeuk Kimfec1d652016-01-20 23:43:51 +0800758 f2fs_wait_on_page_writeback(page, DATA, true);
Chao Yu63943282015-08-07 18:36:06 +0800759 zero_user(page, start, len);
760 set_page_dirty(page);
761 f2fs_put_page(page, 1);
762 return 0;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900763}
764
765int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
766{
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900767 int err;
768
Chao Yuea587112015-09-17 20:22:44 +0800769 while (pg_start < pg_end) {
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900770 struct dnode_of_data dn;
Chao Yuea587112015-09-17 20:22:44 +0800771 pgoff_t end_offset, count;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900772
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900773 set_new_dnode(&dn, inode, NULL, NULL, 0);
Chao Yuea587112015-09-17 20:22:44 +0800774 err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900775 if (err) {
Chao Yuea587112015-09-17 20:22:44 +0800776 if (err == -ENOENT) {
777 pg_start++;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900778 continue;
Chao Yuea587112015-09-17 20:22:44 +0800779 }
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900780 return err;
781 }
782
Chao Yu81ca7352016-01-26 15:39:35 +0800783 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
Chao Yuea587112015-09-17 20:22:44 +0800784 count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);
785
786 f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
787
788 truncate_data_blocks_range(&dn, count);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900789 f2fs_put_dnode(&dn);
Chao Yuea587112015-09-17 20:22:44 +0800790
791 pg_start += count;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900792 }
793 return 0;
794}
795
Chao Yua66c7b22013-11-22 16:52:50 +0800796static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900797{
798 pgoff_t pg_start, pg_end;
799 loff_t off_start, off_end;
Jaegeuk Kimb9d777b2015-12-22 11:09:35 -0800800 int ret;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900801
Jaegeuk Kimb9d777b2015-12-22 11:09:35 -0800802 ret = f2fs_convert_inline_inode(inode);
803 if (ret)
804 return ret;
Huajun Li9ffe0fb2013-11-10 23:13:20 +0800805
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300806 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
807 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900808
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300809 off_start = offset & (PAGE_SIZE - 1);
810 off_end = (offset + len) & (PAGE_SIZE - 1);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900811
812 if (pg_start == pg_end) {
Chao Yu63943282015-08-07 18:36:06 +0800813 ret = fill_zero(inode, pg_start, off_start,
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900814 off_end - off_start);
Chao Yu63943282015-08-07 18:36:06 +0800815 if (ret)
816 return ret;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900817 } else {
Chao Yu63943282015-08-07 18:36:06 +0800818 if (off_start) {
819 ret = fill_zero(inode, pg_start++, off_start,
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300820 PAGE_SIZE - off_start);
Chao Yu63943282015-08-07 18:36:06 +0800821 if (ret)
822 return ret;
823 }
824 if (off_end) {
825 ret = fill_zero(inode, pg_end, 0, off_end);
826 if (ret)
827 return ret;
828 }
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900829
830 if (pg_start < pg_end) {
831 struct address_space *mapping = inode->i_mapping;
832 loff_t blk_start, blk_end;
Jaegeuk Kim40813632014-09-02 15:31:18 -0700833 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jason Hrycay1127a3d2013-04-08 20:16:44 -0500834
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -0800835 f2fs_balance_fs(sbi, true);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900836
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300837 blk_start = (loff_t)pg_start << PAGE_SHIFT;
838 blk_end = (loff_t)pg_end << PAGE_SHIFT;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900839 truncate_inode_pages_range(mapping, blk_start,
840 blk_end - 1);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900841
Gu Zhenge4795562013-09-27 18:08:30 +0800842 f2fs_lock_op(sbi);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900843 ret = truncate_hole(inode, pg_start, pg_end);
Gu Zhenge4795562013-09-27 18:08:30 +0800844 f2fs_unlock_op(sbi);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900845 }
846 }
847
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +0900848 return ret;
849}
850
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700851static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr,
852 int *do_replace, pgoff_t off, pgoff_t len)
Chao Yub4ace332015-05-06 13:09:46 +0800853{
854 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
855 struct dnode_of_data dn;
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700856 int ret, done, i;
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700857
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700858next_dnode:
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700859 set_new_dnode(&dn, inode, NULL, NULL, 0);
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700860 ret = get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700861 if (ret && ret != -ENOENT) {
862 return ret;
863 } else if (ret == -ENOENT) {
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700864 if (dn.max_level == 0)
865 return -ENOENT;
866 done = min((pgoff_t)ADDRS_PER_BLOCK - dn.ofs_in_node, len);
867 blkaddr += done;
868 do_replace += done;
869 goto next;
870 }
871
872 done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, inode) -
873 dn.ofs_in_node, len);
874 for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {
875 *blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
876 if (!is_checkpointed_data(sbi, *blkaddr)) {
877
878 if (test_opt(sbi, LFS)) {
879 f2fs_put_dnode(&dn);
880 return -ENOTSUPP;
881 }
882
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700883 /* do not invalidate this block address */
Chao Yuf28b3432016-02-24 17:16:47 +0800884 f2fs_update_data_blkaddr(&dn, NULL_ADDR);
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700885 *do_replace = 1;
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700886 }
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700887 }
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700888 f2fs_put_dnode(&dn);
889next:
890 len -= done;
891 off += done;
892 if (len)
893 goto next_dnode;
894 return 0;
895}
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700896
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700897static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr,
898 int *do_replace, pgoff_t off, int len)
899{
900 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
901 struct dnode_of_data dn;
902 int ret, i;
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700903
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700904 for (i = 0; i < len; i++, do_replace++, blkaddr++) {
905 if (*do_replace == 0)
906 continue;
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700907
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700908 set_new_dnode(&dn, inode, NULL, NULL, 0);
909 ret = get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA);
910 if (ret) {
911 dec_valid_block_count(sbi, inode, 1);
912 invalidate_blocks(sbi, *blkaddr);
913 } else {
914 f2fs_update_data_blkaddr(&dn, *blkaddr);
Jaegeuk Kim36abef42016-06-03 19:29:38 -0700915 }
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700916 f2fs_put_dnode(&dn);
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700917 }
918 return 0;
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700919}
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700920
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700921static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode,
922 block_t *blkaddr, int *do_replace,
923 pgoff_t src, pgoff_t dst, pgoff_t len, bool full)
924{
925 struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode);
926 pgoff_t i = 0;
927 int ret;
928
929 while (i < len) {
930 if (blkaddr[i] == NULL_ADDR && !full) {
931 i++;
932 continue;
933 }
934
935 if (do_replace[i] || blkaddr[i] == NULL_ADDR) {
936 struct dnode_of_data dn;
937 struct node_info ni;
938 size_t new_size;
939 pgoff_t ilen;
940
941 set_new_dnode(&dn, dst_inode, NULL, NULL, 0);
942 ret = get_dnode_of_data(&dn, dst + i, ALLOC_NODE);
943 if (ret)
944 return ret;
945
946 get_node_info(sbi, dn.nid, &ni);
947 ilen = min((pgoff_t)
948 ADDRS_PER_PAGE(dn.node_page, dst_inode) -
949 dn.ofs_in_node, len - i);
950 do {
951 dn.data_blkaddr = datablock_addr(dn.node_page,
952 dn.ofs_in_node);
953 truncate_data_blocks_range(&dn, 1);
954
955 if (do_replace[i]) {
956 f2fs_i_blocks_write(src_inode,
957 1, false);
958 f2fs_i_blocks_write(dst_inode,
959 1, true);
960 f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
961 blkaddr[i], ni.version, true, false);
962
963 do_replace[i] = 0;
964 }
965 dn.ofs_in_node++;
966 i++;
967 new_size = (dst + i) << PAGE_SHIFT;
968 if (dst_inode->i_size < new_size)
969 f2fs_i_size_write(dst_inode, new_size);
970 } while ((do_replace[i] || blkaddr[i] == NULL_ADDR) && --ilen);
971
972 f2fs_put_dnode(&dn);
973 } else {
974 struct page *psrc, *pdst;
975
976 psrc = get_lock_data_page(src_inode, src + i, true);
977 if (IS_ERR(psrc))
978 return PTR_ERR(psrc);
979 pdst = get_new_data_page(dst_inode, NULL, dst + i,
980 true);
981 if (IS_ERR(pdst)) {
982 f2fs_put_page(psrc, 1);
983 return PTR_ERR(pdst);
984 }
985 f2fs_copy_page(psrc, pdst);
986 set_page_dirty(pdst);
987 f2fs_put_page(pdst, 1);
988 f2fs_put_page(psrc, 1);
989
990 ret = truncate_hole(src_inode, src + i, src + i + 1);
991 if (ret)
992 return ret;
993 i++;
994 }
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -0700995 }
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -0700996 return 0;
997}
998
999static int __exchange_data_block(struct inode *src_inode,
1000 struct inode *dst_inode, pgoff_t src, pgoff_t dst,
Jaegeuk Kim363cad72016-07-16 21:59:22 -07001001 pgoff_t len, bool full)
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001002{
1003 block_t *src_blkaddr;
1004 int *do_replace;
Jaegeuk Kim363cad72016-07-16 21:59:22 -07001005 pgoff_t olen;
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001006 int ret;
1007
Jaegeuk Kim363cad72016-07-16 21:59:22 -07001008 while (len) {
1009 olen = min((pgoff_t)4 * ADDRS_PER_BLOCK, len);
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001010
Jaegeuk Kim363cad72016-07-16 21:59:22 -07001011 src_blkaddr = f2fs_kvzalloc(sizeof(block_t) * olen, GFP_KERNEL);
1012 if (!src_blkaddr)
1013 return -ENOMEM;
1014
1015 do_replace = f2fs_kvzalloc(sizeof(int) * olen, GFP_KERNEL);
1016 if (!do_replace) {
1017 kvfree(src_blkaddr);
1018 return -ENOMEM;
1019 }
1020
1021 ret = __read_out_blkaddrs(src_inode, src_blkaddr,
1022 do_replace, src, olen);
1023 if (ret)
1024 goto roll_back;
1025
1026 ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,
1027 do_replace, src, dst, olen, full);
1028 if (ret)
1029 goto roll_back;
1030
1031 src += olen;
1032 dst += olen;
1033 len -= olen;
1034
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001035 kvfree(src_blkaddr);
Jaegeuk Kim363cad72016-07-16 21:59:22 -07001036 kvfree(do_replace);
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001037 }
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001038 return 0;
1039
1040roll_back:
1041 __roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, len);
1042 kvfree(src_blkaddr);
1043 kvfree(do_replace);
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -07001044 return ret;
1045}
1046
1047static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end)
1048{
1049 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Chao Yub4ace332015-05-06 13:09:46 +08001050 pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001051 int ret;
Chao Yub4ace332015-05-06 13:09:46 +08001052
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001053 f2fs_balance_fs(sbi, true);
1054 f2fs_lock_op(sbi);
Jaegeuk Kim5f281fa2016-07-12 11:07:52 -07001055
1056 f2fs_drop_extent_tree(inode);
1057
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001058 ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true);
1059 f2fs_unlock_op(sbi);
Chao Yub4ace332015-05-06 13:09:46 +08001060 return ret;
1061}
1062
1063static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
1064{
1065 pgoff_t pg_start, pg_end;
1066 loff_t new_size;
1067 int ret;
1068
Chao Yub4ace332015-05-06 13:09:46 +08001069 if (offset + len >= i_size_read(inode))
1070 return -EINVAL;
1071
1072 /* collapse range should be aligned to block size of f2fs. */
1073 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1074 return -EINVAL;
1075
Jaegeuk Kimb9d777b2015-12-22 11:09:35 -08001076 ret = f2fs_convert_inline_inode(inode);
1077 if (ret)
1078 return ret;
Jaegeuk Kim97a7b2c2015-06-17 13:59:05 -07001079
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001080 pg_start = offset >> PAGE_SHIFT;
1081 pg_end = (offset + len) >> PAGE_SHIFT;
Chao Yub4ace332015-05-06 13:09:46 +08001082
1083 /* write out all dirty pages from offset */
1084 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1085 if (ret)
1086 return ret;
1087
1088 truncate_pagecache(inode, offset);
1089
1090 ret = f2fs_do_collapse(inode, pg_start, pg_end);
1091 if (ret)
1092 return ret;
1093
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -07001094 /* write out all moved pages, if possible */
1095 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1096 truncate_pagecache(inode, offset);
1097
Chao Yub4ace332015-05-06 13:09:46 +08001098 new_size = i_size_read(inode) - len;
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -07001099 truncate_pagecache(inode, new_size);
Chao Yub4ace332015-05-06 13:09:46 +08001100
1101 ret = truncate_blocks(inode, new_size, true);
1102 if (!ret)
Jaegeuk Kimfc9581c2016-05-20 09:22:03 -07001103 f2fs_i_size_write(inode, new_size);
Chao Yub4ace332015-05-06 13:09:46 +08001104
1105 return ret;
1106}
1107
Chao Yu6e961942016-05-09 19:56:31 +08001108static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,
1109 pgoff_t end)
1110{
1111 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1112 pgoff_t index = start;
1113 unsigned int ofs_in_node = dn->ofs_in_node;
1114 blkcnt_t count = 0;
1115 int ret;
1116
1117 for (; index < end; index++, dn->ofs_in_node++) {
1118 if (datablock_addr(dn->node_page, dn->ofs_in_node) == NULL_ADDR)
1119 count++;
1120 }
1121
1122 dn->ofs_in_node = ofs_in_node;
1123 ret = reserve_new_blocks(dn, count);
1124 if (ret)
1125 return ret;
1126
1127 dn->ofs_in_node = ofs_in_node;
1128 for (index = start; index < end; index++, dn->ofs_in_node++) {
1129 dn->data_blkaddr =
1130 datablock_addr(dn->node_page, dn->ofs_in_node);
1131 /*
1132 * reserve_new_blocks will not guarantee entire block
1133 * allocation.
1134 */
1135 if (dn->data_blkaddr == NULL_ADDR) {
1136 ret = -ENOSPC;
1137 break;
1138 }
1139 if (dn->data_blkaddr != NEW_ADDR) {
1140 invalidate_blocks(sbi, dn->data_blkaddr);
1141 dn->data_blkaddr = NEW_ADDR;
1142 set_data_blkaddr(dn);
1143 }
1144 }
1145
1146 f2fs_update_extent_cache_range(dn, start, 0, index - start);
1147
1148 return ret;
1149}
1150
Chao Yu75cd4e02015-05-06 13:11:13 +08001151static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
1152 int mode)
1153{
1154 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1155 struct address_space *mapping = inode->i_mapping;
1156 pgoff_t index, pg_start, pg_end;
1157 loff_t new_size = i_size_read(inode);
1158 loff_t off_start, off_end;
1159 int ret = 0;
1160
Chao Yu75cd4e02015-05-06 13:11:13 +08001161 ret = inode_newsize_ok(inode, (len + offset));
1162 if (ret)
1163 return ret;
1164
Jaegeuk Kimb9d777b2015-12-22 11:09:35 -08001165 ret = f2fs_convert_inline_inode(inode);
1166 if (ret)
1167 return ret;
Chao Yu75cd4e02015-05-06 13:11:13 +08001168
1169 ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);
1170 if (ret)
1171 return ret;
1172
1173 truncate_pagecache_range(inode, offset, offset + len - 1);
1174
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001175 pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
1176 pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
Chao Yu75cd4e02015-05-06 13:11:13 +08001177
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001178 off_start = offset & (PAGE_SIZE - 1);
1179 off_end = (offset + len) & (PAGE_SIZE - 1);
Chao Yu75cd4e02015-05-06 13:11:13 +08001180
1181 if (pg_start == pg_end) {
Chao Yu63943282015-08-07 18:36:06 +08001182 ret = fill_zero(inode, pg_start, off_start,
1183 off_end - off_start);
1184 if (ret)
1185 return ret;
1186
Chao Yu75cd4e02015-05-06 13:11:13 +08001187 if (offset + len > new_size)
1188 new_size = offset + len;
1189 new_size = max_t(loff_t, new_size, offset + len);
1190 } else {
1191 if (off_start) {
Chao Yu63943282015-08-07 18:36:06 +08001192 ret = fill_zero(inode, pg_start++, off_start,
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001193 PAGE_SIZE - off_start);
Chao Yu63943282015-08-07 18:36:06 +08001194 if (ret)
1195 return ret;
1196
Chao Yu75cd4e02015-05-06 13:11:13 +08001197 new_size = max_t(loff_t, new_size,
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001198 (loff_t)pg_start << PAGE_SHIFT);
Chao Yu75cd4e02015-05-06 13:11:13 +08001199 }
1200
Chao Yu6e961942016-05-09 19:56:31 +08001201 for (index = pg_start; index < pg_end;) {
Chao Yu75cd4e02015-05-06 13:11:13 +08001202 struct dnode_of_data dn;
Chao Yu6e961942016-05-09 19:56:31 +08001203 unsigned int end_offset;
1204 pgoff_t end;
Chao Yu75cd4e02015-05-06 13:11:13 +08001205
1206 f2fs_lock_op(sbi);
1207
Chao Yu6e961942016-05-09 19:56:31 +08001208 set_new_dnode(&dn, inode, NULL, NULL, 0);
1209 ret = get_dnode_of_data(&dn, index, ALLOC_NODE);
Chao Yu75cd4e02015-05-06 13:11:13 +08001210 if (ret) {
1211 f2fs_unlock_op(sbi);
1212 goto out;
1213 }
1214
Chao Yu6e961942016-05-09 19:56:31 +08001215 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1216 end = min(pg_end, end_offset - dn.ofs_in_node + index);
1217
1218 ret = f2fs_do_zero_range(&dn, index, end);
Chao Yu75cd4e02015-05-06 13:11:13 +08001219 f2fs_put_dnode(&dn);
1220 f2fs_unlock_op(sbi);
Chao Yu6e961942016-05-09 19:56:31 +08001221 if (ret)
1222 goto out;
Chao Yu75cd4e02015-05-06 13:11:13 +08001223
Chao Yu6e961942016-05-09 19:56:31 +08001224 index = end;
Chao Yu75cd4e02015-05-06 13:11:13 +08001225 new_size = max_t(loff_t, new_size,
Chao Yu6e961942016-05-09 19:56:31 +08001226 (loff_t)index << PAGE_SHIFT);
Chao Yu75cd4e02015-05-06 13:11:13 +08001227 }
1228
1229 if (off_end) {
Chao Yu63943282015-08-07 18:36:06 +08001230 ret = fill_zero(inode, pg_end, 0, off_end);
1231 if (ret)
1232 goto out;
1233
Chao Yu75cd4e02015-05-06 13:11:13 +08001234 new_size = max_t(loff_t, new_size, offset + len);
1235 }
1236 }
1237
1238out:
Jaegeuk Kimee6d1822016-05-20 16:32:49 -07001239 if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size)
Jaegeuk Kimfc9581c2016-05-20 09:22:03 -07001240 f2fs_i_size_write(inode, new_size);
Chao Yu75cd4e02015-05-06 13:11:13 +08001241
1242 return ret;
1243}
1244
Chao Yuf62185d2015-05-28 19:16:57 +08001245static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
1246{
1247 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001248 pgoff_t nr, pg_start, pg_end, delta, idx;
Chao Yuf62185d2015-05-28 19:16:57 +08001249 loff_t new_size;
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -07001250 int ret = 0;
Chao Yuf62185d2015-05-28 19:16:57 +08001251
Chao Yuf62185d2015-05-28 19:16:57 +08001252 new_size = i_size_read(inode) + len;
1253 if (new_size > inode->i_sb->s_maxbytes)
1254 return -EFBIG;
1255
1256 if (offset >= i_size_read(inode))
1257 return -EINVAL;
1258
1259 /* insert range should be aligned to block size of f2fs. */
1260 if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
1261 return -EINVAL;
1262
Jaegeuk Kimb9d777b2015-12-22 11:09:35 -08001263 ret = f2fs_convert_inline_inode(inode);
1264 if (ret)
1265 return ret;
Jaegeuk Kim97a7b2c2015-06-17 13:59:05 -07001266
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -08001267 f2fs_balance_fs(sbi, true);
Jaegeuk Kim2a340762015-12-22 13:23:35 -08001268
Chao Yuf62185d2015-05-28 19:16:57 +08001269 ret = truncate_blocks(inode, i_size_read(inode), true);
1270 if (ret)
1271 return ret;
1272
1273 /* write out all dirty pages from offset */
1274 ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1275 if (ret)
1276 return ret;
1277
1278 truncate_pagecache(inode, offset);
1279
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001280 pg_start = offset >> PAGE_SHIFT;
1281 pg_end = (offset + len) >> PAGE_SHIFT;
Chao Yuf62185d2015-05-28 19:16:57 +08001282 delta = pg_end - pg_start;
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001283 idx = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
Chao Yuf62185d2015-05-28 19:16:57 +08001284
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001285 while (!ret && idx > pg_start) {
1286 nr = idx - pg_start;
1287 if (nr > delta)
1288 nr = delta;
1289 idx -= nr;
1290
Chao Yuf62185d2015-05-28 19:16:57 +08001291 f2fs_lock_op(sbi);
Jaegeuk Kim5f281fa2016-07-12 11:07:52 -07001292 f2fs_drop_extent_tree(inode);
1293
Jaegeuk Kim0a2aa8f2016-07-08 17:42:21 -07001294 ret = __exchange_data_block(inode, inode, idx,
1295 idx + delta, nr, false);
Chao Yuf62185d2015-05-28 19:16:57 +08001296 f2fs_unlock_op(sbi);
1297 }
1298
Jaegeuk Kim6e2c64a2015-10-07 12:28:41 -07001299 /* write out all moved pages, if possible */
1300 filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
1301 truncate_pagecache(inode, offset);
1302
1303 if (!ret)
Jaegeuk Kimfc9581c2016-05-20 09:22:03 -07001304 f2fs_i_size_write(inode, new_size);
Chao Yuf62185d2015-05-28 19:16:57 +08001305 return ret;
1306}
1307
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001308static int expand_inode_data(struct inode *inode, loff_t offset,
1309 loff_t len, int mode)
1310{
Jaegeuk Kim40813632014-09-02 15:31:18 -07001311 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Jaegeuk Kime12dd7b2016-05-06 15:30:38 -07001312 struct f2fs_map_blocks map = { .m_next_pgofs = NULL };
1313 pgoff_t pg_end;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001314 loff_t new_size = i_size_read(inode);
Jaegeuk Kime12dd7b2016-05-06 15:30:38 -07001315 loff_t off_end;
1316 int ret;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001317
1318 ret = inode_newsize_ok(inode, (len + offset));
1319 if (ret)
1320 return ret;
1321
Jaegeuk Kimb9d777b2015-12-22 11:09:35 -08001322 ret = f2fs_convert_inline_inode(inode);
1323 if (ret)
1324 return ret;
Jaegeuk Kim9e09fc82013-12-27 12:28:59 +09001325
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -08001326 f2fs_balance_fs(sbi, true);
Jaegeuk Kim2a340762015-12-22 13:23:35 -08001327
Jaegeuk Kime12dd7b2016-05-06 15:30:38 -07001328 pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT;
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001329 off_end = (offset + len) & (PAGE_SIZE - 1);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001330
Jaegeuk Kime12dd7b2016-05-06 15:30:38 -07001331 map.m_lblk = ((unsigned long long)offset) >> PAGE_SHIFT;
1332 map.m_len = pg_end - map.m_lblk;
1333 if (off_end)
1334 map.m_len++;
Jaegeuk Kimead43272014-06-13 13:05:55 +09001335
Jaegeuk Kime12dd7b2016-05-06 15:30:38 -07001336 ret = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO);
1337 if (ret) {
1338 pgoff_t last_off;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001339
Jaegeuk Kime12dd7b2016-05-06 15:30:38 -07001340 if (!map.m_len)
1341 return ret;
Jaegeuk Kim98397ff2014-06-13 13:07:31 +09001342
Jaegeuk Kime12dd7b2016-05-06 15:30:38 -07001343 last_off = map.m_lblk + map.m_len - 1;
1344
1345 /* update new size to the failed position */
1346 new_size = (last_off == pg_end) ? offset + len:
1347 (loff_t)(last_off + 1) << PAGE_SHIFT;
1348 } else {
1349 new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001350 }
1351
Jaegeuk Kimee6d1822016-05-20 16:32:49 -07001352 if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size)
Jaegeuk Kimfc9581c2016-05-20 09:22:03 -07001353 f2fs_i_size_write(inode, new_size);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001354
1355 return ret;
1356}
1357
1358static long f2fs_fallocate(struct file *file, int mode,
1359 loff_t offset, loff_t len)
1360{
Al Viro6131ffa2013-02-27 16:59:05 -05001361 struct inode *inode = file_inode(file);
Taehee Yoo587c0a42015-04-21 15:59:12 +09001362 long ret = 0;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001363
Chao Yuc9980122015-09-11 14:39:02 +08001364 /* f2fs only support ->fallocate for regular file */
1365 if (!S_ISREG(inode->i_mode))
1366 return -EINVAL;
1367
Chao Yuf62185d2015-05-28 19:16:57 +08001368 if (f2fs_encrypted_inode(inode) &&
1369 (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -07001370 return -EOPNOTSUPP;
1371
Chao Yub4ace332015-05-06 13:09:46 +08001372 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
Chao Yuf62185d2015-05-28 19:16:57 +08001373 FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
1374 FALLOC_FL_INSERT_RANGE))
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001375 return -EOPNOTSUPP;
1376
Al Viro59551022016-01-22 15:40:57 -05001377 inode_lock(inode);
Chao Yu3375f692014-01-28 10:29:26 +08001378
Taehee Yoo587c0a42015-04-21 15:59:12 +09001379 if (mode & FALLOC_FL_PUNCH_HOLE) {
1380 if (offset >= inode->i_size)
1381 goto out;
1382
Chao Yua66c7b22013-11-22 16:52:50 +08001383 ret = punch_hole(inode, offset, len);
Chao Yub4ace332015-05-06 13:09:46 +08001384 } else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
1385 ret = f2fs_collapse_range(inode, offset, len);
Chao Yu75cd4e02015-05-06 13:11:13 +08001386 } else if (mode & FALLOC_FL_ZERO_RANGE) {
1387 ret = f2fs_zero_range(inode, offset, len, mode);
Chao Yuf62185d2015-05-28 19:16:57 +08001388 } else if (mode & FALLOC_FL_INSERT_RANGE) {
1389 ret = f2fs_insert_range(inode, offset, len);
Chao Yub4ace332015-05-06 13:09:46 +08001390 } else {
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001391 ret = expand_inode_data(inode, offset, len, mode);
Chao Yub4ace332015-05-06 13:09:46 +08001392 }
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001393
Namjae Jeon3af60a42012-12-30 14:52:37 +09001394 if (!ret) {
Deepa Dinamani078cd822016-09-14 07:48:04 -07001395 inode->i_mtime = inode->i_ctime = current_time(inode);
Jaegeuk Kimb56ab832016-06-30 19:09:37 -07001396 f2fs_mark_inode_dirty_sync(inode);
Jaegeuk Kimd0239e12016-01-08 16:57:48 -08001397 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
Namjae Jeon3af60a42012-12-30 14:52:37 +09001398 }
Chao Yu3375f692014-01-28 10:29:26 +08001399
Taehee Yoo587c0a42015-04-21 15:59:12 +09001400out:
Al Viro59551022016-01-22 15:40:57 -05001401 inode_unlock(inode);
Chao Yu3375f692014-01-28 10:29:26 +08001402
Namjae Jeonc01e2852013-04-23 17:00:52 +09001403 trace_f2fs_fallocate(inode, mode, offset, len, ret);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001404 return ret;
1405}
1406
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001407static int f2fs_release_file(struct inode *inode, struct file *filp)
1408{
Jaegeuk Kimde5307e2016-04-11 11:51:51 -07001409 /*
1410 * f2fs_relase_file is called at every close calls. So we should
1411 * not drop any inmemory pages by close called by other process.
1412 */
1413 if (!(filp->f_mode & FMODE_WRITE) ||
1414 atomic_read(&inode->i_writecount) != 1)
1415 return 0;
1416
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001417 /* some remained atomic pages should discarded */
1418 if (f2fs_is_atomic_file(inode))
Chao Yu29b96b52016-02-06 14:38:29 +08001419 drop_inmem_pages(inode);
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001420 if (f2fs_is_volatile_file(inode)) {
Jaegeuk Kim91942322016-05-20 10:13:22 -07001421 clear_inode_flag(inode, FI_VOLATILE_FILE);
1422 set_inode_flag(inode, FI_DROP_CACHE);
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001423 filemap_fdatawrite(inode->i_mapping);
Jaegeuk Kim91942322016-05-20 10:13:22 -07001424 clear_inode_flag(inode, FI_DROP_CACHE);
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001425 }
1426 return 0;
1427}
1428
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001429#define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
1430#define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL)
1431
1432static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
1433{
1434 if (S_ISDIR(mode))
1435 return flags;
1436 else if (S_ISREG(mode))
1437 return flags & F2FS_REG_FLMASK;
1438 else
1439 return flags & F2FS_OTHER_FLMASK;
1440}
1441
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001442static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001443{
Al Viro6131ffa2013-02-27 16:59:05 -05001444 struct inode *inode = file_inode(filp);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001445 struct f2fs_inode_info *fi = F2FS_I(inode);
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001446 unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
1447 return put_user(flags, (int __user *)arg);
1448}
1449
1450static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
1451{
1452 struct inode *inode = file_inode(filp);
1453 struct f2fs_inode_info *fi = F2FS_I(inode);
Sheng Yong69494222016-08-23 20:10:47 +08001454 unsigned int flags;
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001455 unsigned int oldflags;
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09001456 int ret;
1457
Chao Yu7fb17fe2016-05-09 19:56:32 +08001458 if (!inode_owner_or_capable(inode))
1459 return -EACCES;
1460
1461 if (get_user(flags, (int __user *)arg))
1462 return -EFAULT;
1463
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001464 ret = mnt_want_write_file(filp);
1465 if (ret)
1466 return ret;
1467
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001468 flags = f2fs_mask_flags(inode->i_mode, flags);
1469
Al Viro59551022016-01-22 15:40:57 -05001470 inode_lock(inode);
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001471
1472 oldflags = fi->i_flags;
1473
1474 if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
1475 if (!capable(CAP_LINUX_IMMUTABLE)) {
Al Viro59551022016-01-22 15:40:57 -05001476 inode_unlock(inode);
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001477 ret = -EPERM;
1478 goto out;
1479 }
1480 }
1481
1482 flags = flags & FS_FL_USER_MODIFIABLE;
1483 flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
1484 fi->i_flags = flags;
Al Viro59551022016-01-22 15:40:57 -05001485 inode_unlock(inode);
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001486
Deepa Dinamani078cd822016-09-14 07:48:04 -07001487 inode->i_ctime = current_time(inode);
Jaegeuk Kim205b9822016-05-20 09:52:20 -07001488 f2fs_set_inode_flags(inode);
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001489out:
1490 mnt_drop_write_file(filp);
1491 return ret;
1492}
1493
Chao Yud49f3e82015-01-23 20:36:04 +08001494static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
1495{
1496 struct inode *inode = file_inode(filp);
1497
1498 return put_user(inode->i_generation, (int __user *)arg);
1499}
1500
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07001501static int f2fs_ioc_start_atomic_write(struct file *filp)
1502{
1503 struct inode *inode = file_inode(filp);
Chao Yuf4c9c742015-07-17 18:06:35 +08001504 int ret;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07001505
1506 if (!inode_owner_or_capable(inode))
1507 return -EACCES;
1508
Chao Yu7fb17fe2016-05-09 19:56:32 +08001509 ret = mnt_want_write_file(filp);
1510 if (ret)
1511 return ret;
1512
Chao Yu0fac5582016-05-09 19:56:33 +08001513 inode_lock(inode);
1514
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001515 if (f2fs_is_atomic_file(inode))
Chao Yu7fb17fe2016-05-09 19:56:32 +08001516 goto out;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07001517
Chao Yuf4c9c742015-07-17 18:06:35 +08001518 ret = f2fs_convert_inline_inode(inode);
1519 if (ret)
Chao Yu7fb17fe2016-05-09 19:56:32 +08001520 goto out;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07001521
Jaegeuk Kim91942322016-05-20 10:13:22 -07001522 set_inode_flag(inode, FI_ATOMIC_FILE);
Jaegeuk Kimd0239e12016-01-08 16:57:48 -08001523 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1524
Jaegeuk Kimc27753d2016-04-12 14:36:11 -07001525 if (!get_dirty_pages(inode))
Chao Yu7fb17fe2016-05-09 19:56:32 +08001526 goto out;
Jaegeuk Kimc27753d2016-04-12 14:36:11 -07001527
1528 f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING,
Jaegeuk Kim1beba1b2016-05-13 12:47:11 -07001529 "Unexpected flush for atomic writes: ino=%lu, npages=%lld",
Jaegeuk Kimc27753d2016-04-12 14:36:11 -07001530 inode->i_ino, get_dirty_pages(inode));
1531 ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
1532 if (ret)
Jaegeuk Kim91942322016-05-20 10:13:22 -07001533 clear_inode_flag(inode, FI_ATOMIC_FILE);
Chao Yu7fb17fe2016-05-09 19:56:32 +08001534out:
Chao Yu0fac5582016-05-09 19:56:33 +08001535 inode_unlock(inode);
Chao Yu7fb17fe2016-05-09 19:56:32 +08001536 mnt_drop_write_file(filp);
Jaegeuk Kimc27753d2016-04-12 14:36:11 -07001537 return ret;
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07001538}
1539
1540static int f2fs_ioc_commit_atomic_write(struct file *filp)
1541{
1542 struct inode *inode = file_inode(filp);
1543 int ret;
1544
1545 if (!inode_owner_or_capable(inode))
1546 return -EACCES;
1547
1548 ret = mnt_want_write_file(filp);
1549 if (ret)
1550 return ret;
1551
Chao Yu0fac5582016-05-09 19:56:33 +08001552 inode_lock(inode);
1553
Chao Yu7fb17fe2016-05-09 19:56:32 +08001554 if (f2fs_is_volatile_file(inode))
1555 goto err_out;
1556
Jaegeuk Kim6282adb2015-07-25 00:29:17 -07001557 if (f2fs_is_atomic_file(inode)) {
Jaegeuk Kim91942322016-05-20 10:13:22 -07001558 clear_inode_flag(inode, FI_ATOMIC_FILE);
Chao Yu29b96b52016-02-06 14:38:29 +08001559 ret = commit_inmem_pages(inode);
Jaegeuk Kim447135a2016-01-09 17:08:38 -08001560 if (ret) {
Jaegeuk Kim91942322016-05-20 10:13:22 -07001561 set_inode_flag(inode, FI_ATOMIC_FILE);
Jaegeuk Kimedb27de2015-07-25 00:52:52 -07001562 goto err_out;
Jaegeuk Kim447135a2016-01-09 17:08:38 -08001563 }
Jaegeuk Kim6282adb2015-07-25 00:29:17 -07001564 }
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07001565
Jaegeuk Kim608514d2016-04-15 09:43:17 -07001566 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
Jaegeuk Kimedb27de2015-07-25 00:52:52 -07001567err_out:
Chao Yu0fac5582016-05-09 19:56:33 +08001568 inode_unlock(inode);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07001569 mnt_drop_write_file(filp);
1570 return ret;
1571}
1572
Jaegeuk Kim02a13352014-10-06 16:11:16 -07001573static int f2fs_ioc_start_volatile_write(struct file *filp)
1574{
1575 struct inode *inode = file_inode(filp);
Chao Yuf4c9c742015-07-17 18:06:35 +08001576 int ret;
Jaegeuk Kim02a13352014-10-06 16:11:16 -07001577
1578 if (!inode_owner_or_capable(inode))
1579 return -EACCES;
1580
Chao Yu7fb17fe2016-05-09 19:56:32 +08001581 ret = mnt_want_write_file(filp);
Chao Yuf4c9c742015-07-17 18:06:35 +08001582 if (ret)
1583 return ret;
Jaegeuk Kimb3d208f2014-10-23 19:48:09 -07001584
Chao Yu0fac5582016-05-09 19:56:33 +08001585 inode_lock(inode);
1586
Chao Yu7fb17fe2016-05-09 19:56:32 +08001587 if (f2fs_is_volatile_file(inode))
1588 goto out;
1589
1590 ret = f2fs_convert_inline_inode(inode);
1591 if (ret)
1592 goto out;
1593
Jaegeuk Kim91942322016-05-20 10:13:22 -07001594 set_inode_flag(inode, FI_VOLATILE_FILE);
Jaegeuk Kimd0239e12016-01-08 16:57:48 -08001595 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
Chao Yu7fb17fe2016-05-09 19:56:32 +08001596out:
Chao Yu0fac5582016-05-09 19:56:33 +08001597 inode_unlock(inode);
Chao Yu7fb17fe2016-05-09 19:56:32 +08001598 mnt_drop_write_file(filp);
1599 return ret;
Jaegeuk Kim02a13352014-10-06 16:11:16 -07001600}
1601
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001602static int f2fs_ioc_release_volatile_write(struct file *filp)
1603{
1604 struct inode *inode = file_inode(filp);
Chao Yu7fb17fe2016-05-09 19:56:32 +08001605 int ret;
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001606
1607 if (!inode_owner_or_capable(inode))
1608 return -EACCES;
1609
Chao Yu7fb17fe2016-05-09 19:56:32 +08001610 ret = mnt_want_write_file(filp);
1611 if (ret)
1612 return ret;
1613
Chao Yu0fac5582016-05-09 19:56:33 +08001614 inode_lock(inode);
1615
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001616 if (!f2fs_is_volatile_file(inode))
Chao Yu7fb17fe2016-05-09 19:56:32 +08001617 goto out;
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001618
Chao Yu7fb17fe2016-05-09 19:56:32 +08001619 if (!f2fs_is_first_block_written(inode)) {
1620 ret = truncate_partial_data_page(inode, 0, true);
1621 goto out;
1622 }
Jaegeuk Kim3c6c2be2015-03-17 17:16:35 -07001623
Chao Yu7fb17fe2016-05-09 19:56:32 +08001624 ret = punch_hole(inode, 0, F2FS_BLKSIZE);
1625out:
Chao Yu0fac5582016-05-09 19:56:33 +08001626 inode_unlock(inode);
Chao Yu7fb17fe2016-05-09 19:56:32 +08001627 mnt_drop_write_file(filp);
1628 return ret;
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001629}
1630
1631static int f2fs_ioc_abort_volatile_write(struct file *filp)
1632{
1633 struct inode *inode = file_inode(filp);
1634 int ret;
1635
1636 if (!inode_owner_or_capable(inode))
1637 return -EACCES;
1638
1639 ret = mnt_want_write_file(filp);
1640 if (ret)
1641 return ret;
1642
Chao Yu0fac5582016-05-09 19:56:33 +08001643 inode_lock(inode);
1644
Jaegeuk Kim26dc3d42016-04-11 13:15:10 -07001645 if (f2fs_is_atomic_file(inode))
Chao Yu29b96b52016-02-06 14:38:29 +08001646 drop_inmem_pages(inode);
Jaegeuk Kim732d5642015-12-29 15:46:33 -08001647 if (f2fs_is_volatile_file(inode)) {
Jaegeuk Kim91942322016-05-20 10:13:22 -07001648 clear_inode_flag(inode, FI_VOLATILE_FILE);
Jaegeuk Kim608514d2016-04-15 09:43:17 -07001649 ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
Jaegeuk Kim732d5642015-12-29 15:46:33 -08001650 }
Jaegeuk Kimde6a8ec2015-06-08 17:51:10 -07001651
Chao Yu0fac5582016-05-09 19:56:33 +08001652 inode_unlock(inode);
1653
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001654 mnt_drop_write_file(filp);
Jaegeuk Kimd0239e12016-01-08 16:57:48 -08001655 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
Jaegeuk Kim1e843712014-12-09 06:08:59 -08001656 return ret;
1657}
1658
Jaegeuk Kim1abff932015-01-08 19:15:53 -08001659static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
1660{
1661 struct inode *inode = file_inode(filp);
1662 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1663 struct super_block *sb = sbi->sb;
1664 __u32 in;
Chao Yu7fb17fe2016-05-09 19:56:32 +08001665 int ret;
Jaegeuk Kim1abff932015-01-08 19:15:53 -08001666
1667 if (!capable(CAP_SYS_ADMIN))
1668 return -EPERM;
1669
1670 if (get_user(in, (__u32 __user *)arg))
1671 return -EFAULT;
1672
Chao Yu7fb17fe2016-05-09 19:56:32 +08001673 ret = mnt_want_write_file(filp);
1674 if (ret)
1675 return ret;
1676
Jaegeuk Kim1abff932015-01-08 19:15:53 -08001677 switch (in) {
1678 case F2FS_GOING_DOWN_FULLSYNC:
1679 sb = freeze_bdev(sb->s_bdev);
1680 if (sb && !IS_ERR(sb)) {
Jaegeuk Kim38f91ca2016-05-18 14:07:56 -07001681 f2fs_stop_checkpoint(sbi, false);
Jaegeuk Kim1abff932015-01-08 19:15:53 -08001682 thaw_bdev(sb->s_bdev, sb);
1683 }
1684 break;
1685 case F2FS_GOING_DOWN_METASYNC:
1686 /* do checkpoint only */
1687 f2fs_sync_fs(sb, 1);
Jaegeuk Kim38f91ca2016-05-18 14:07:56 -07001688 f2fs_stop_checkpoint(sbi, false);
Jaegeuk Kim1abff932015-01-08 19:15:53 -08001689 break;
1690 case F2FS_GOING_DOWN_NOSYNC:
Jaegeuk Kim38f91ca2016-05-18 14:07:56 -07001691 f2fs_stop_checkpoint(sbi, false);
Jaegeuk Kim1abff932015-01-08 19:15:53 -08001692 break;
Jaegeuk Kimc912a822015-10-07 09:46:37 -07001693 case F2FS_GOING_DOWN_METAFLUSH:
1694 sync_meta_pages(sbi, META, LONG_MAX);
Jaegeuk Kim38f91ca2016-05-18 14:07:56 -07001695 f2fs_stop_checkpoint(sbi, false);
Jaegeuk Kimc912a822015-10-07 09:46:37 -07001696 break;
Jaegeuk Kim1abff932015-01-08 19:15:53 -08001697 default:
Chao Yu7fb17fe2016-05-09 19:56:32 +08001698 ret = -EINVAL;
1699 goto out;
Jaegeuk Kim1abff932015-01-08 19:15:53 -08001700 }
Jaegeuk Kimd0239e12016-01-08 16:57:48 -08001701 f2fs_update_time(sbi, REQ_TIME);
Chao Yu7fb17fe2016-05-09 19:56:32 +08001702out:
1703 mnt_drop_write_file(filp);
1704 return ret;
Jaegeuk Kim1abff932015-01-08 19:15:53 -08001705}
1706
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001707static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
1708{
1709 struct inode *inode = file_inode(filp);
1710 struct super_block *sb = inode->i_sb;
1711 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1712 struct fstrim_range range;
1713 int ret;
1714
1715 if (!capable(CAP_SYS_ADMIN))
1716 return -EPERM;
1717
1718 if (!blk_queue_discard(q))
1719 return -EOPNOTSUPP;
1720
1721 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1722 sizeof(range)))
1723 return -EFAULT;
1724
Chao Yu7fb17fe2016-05-09 19:56:32 +08001725 ret = mnt_want_write_file(filp);
1726 if (ret)
1727 return ret;
1728
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001729 range.minlen = max((unsigned int)range.minlen,
1730 q->limits.discard_granularity);
1731 ret = f2fs_trim_fs(F2FS_SB(sb), &range);
Chao Yu7fb17fe2016-05-09 19:56:32 +08001732 mnt_drop_write_file(filp);
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001733 if (ret < 0)
1734 return ret;
1735
1736 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1737 sizeof(range)))
1738 return -EFAULT;
Jaegeuk Kimd0239e12016-01-08 16:57:48 -08001739 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
Jaegeuk Kim52656e62014-09-24 15:37:02 -07001740 return 0;
1741}
1742
Jaegeuk Kimf424f662015-04-20 15:19:06 -07001743static bool uuid_is_nonzero(__u8 u[16])
1744{
1745 int i;
1746
1747 for (i = 0; i < 16; i++)
1748 if (u[i])
1749 return true;
1750 return false;
1751}
1752
1753static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
1754{
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07001755 struct fscrypt_policy policy;
Jaegeuk Kimf424f662015-04-20 15:19:06 -07001756 struct inode *inode = file_inode(filp);
1757
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07001758 if (copy_from_user(&policy, (struct fscrypt_policy __user *)arg,
1759 sizeof(policy)))
Jaegeuk Kimf424f662015-04-20 15:19:06 -07001760 return -EFAULT;
1761
Jaegeuk Kimd0239e12016-01-08 16:57:48 -08001762 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
Chao Yu7fb17fe2016-05-09 19:56:32 +08001763
Eric Biggersba63f232016-09-08 14:20:38 -07001764 return fscrypt_process_policy(filp, &policy);
Jaegeuk Kimf424f662015-04-20 15:19:06 -07001765}
1766
1767static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
1768{
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07001769 struct fscrypt_policy policy;
Jaegeuk Kimf424f662015-04-20 15:19:06 -07001770 struct inode *inode = file_inode(filp);
1771 int err;
1772
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07001773 err = fscrypt_get_policy(inode, &policy);
Jaegeuk Kimf424f662015-04-20 15:19:06 -07001774 if (err)
1775 return err;
1776
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07001777 if (copy_to_user((struct fscrypt_policy __user *)arg, &policy, sizeof(policy)))
Jaegeuk Kimf424f662015-04-20 15:19:06 -07001778 return -EFAULT;
1779 return 0;
Jaegeuk Kimf424f662015-04-20 15:19:06 -07001780}
1781
1782static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
1783{
1784 struct inode *inode = file_inode(filp);
1785 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1786 int err;
1787
1788 if (!f2fs_sb_has_crypto(inode->i_sb))
1789 return -EOPNOTSUPP;
1790
1791 if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
1792 goto got_it;
1793
1794 err = mnt_want_write_file(filp);
1795 if (err)
1796 return err;
1797
1798 /* update superblock with uuid */
1799 generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
1800
Chao Yuc5bda1c2015-06-08 13:28:03 +08001801 err = f2fs_commit_super(sbi, false);
Jaegeuk Kimf424f662015-04-20 15:19:06 -07001802 if (err) {
1803 /* undo new data */
1804 memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
Chao Yue8240f62015-12-15 17:19:26 +08001805 mnt_drop_write_file(filp);
Jaegeuk Kimf424f662015-04-20 15:19:06 -07001806 return err;
1807 }
Chao Yue8240f62015-12-15 17:19:26 +08001808 mnt_drop_write_file(filp);
Jaegeuk Kimf424f662015-04-20 15:19:06 -07001809got_it:
1810 if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt,
1811 16))
1812 return -EFAULT;
1813 return 0;
1814}
1815
Chao Yuc1c1b582015-07-10 18:08:10 +08001816static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
1817{
1818 struct inode *inode = file_inode(filp);
1819 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Chao Yud530d4d2015-10-05 22:22:44 +08001820 __u32 sync;
Chao Yu7fb17fe2016-05-09 19:56:32 +08001821 int ret;
Chao Yuc1c1b582015-07-10 18:08:10 +08001822
1823 if (!capable(CAP_SYS_ADMIN))
1824 return -EPERM;
1825
Chao Yud530d4d2015-10-05 22:22:44 +08001826 if (get_user(sync, (__u32 __user *)arg))
Chao Yuc1c1b582015-07-10 18:08:10 +08001827 return -EFAULT;
1828
Chao Yud530d4d2015-10-05 22:22:44 +08001829 if (f2fs_readonly(sbi->sb))
1830 return -EROFS;
Chao Yuc1c1b582015-07-10 18:08:10 +08001831
Chao Yu7fb17fe2016-05-09 19:56:32 +08001832 ret = mnt_want_write_file(filp);
1833 if (ret)
1834 return ret;
1835
Chao Yud530d4d2015-10-05 22:22:44 +08001836 if (!sync) {
Chao Yu7fb17fe2016-05-09 19:56:32 +08001837 if (!mutex_trylock(&sbi->gc_mutex)) {
1838 ret = -EBUSY;
1839 goto out;
1840 }
Chao Yud530d4d2015-10-05 22:22:44 +08001841 } else {
1842 mutex_lock(&sbi->gc_mutex);
Chao Yuc1c1b582015-07-10 18:08:10 +08001843 }
1844
Chao Yu7fb17fe2016-05-09 19:56:32 +08001845 ret = f2fs_gc(sbi, sync);
1846out:
1847 mnt_drop_write_file(filp);
1848 return ret;
Chao Yuc1c1b582015-07-10 18:08:10 +08001849}
1850
Chao Yu456b88e2015-10-05 22:24:19 +08001851static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
1852{
1853 struct inode *inode = file_inode(filp);
1854 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
Chao Yu7fb17fe2016-05-09 19:56:32 +08001855 int ret;
Chao Yu456b88e2015-10-05 22:24:19 +08001856
1857 if (!capable(CAP_SYS_ADMIN))
1858 return -EPERM;
1859
1860 if (f2fs_readonly(sbi->sb))
1861 return -EROFS;
1862
Chao Yu7fb17fe2016-05-09 19:56:32 +08001863 ret = mnt_want_write_file(filp);
1864 if (ret)
1865 return ret;
1866
1867 ret = f2fs_sync_fs(sbi->sb, 1);
1868
1869 mnt_drop_write_file(filp);
1870 return ret;
Chao Yu456b88e2015-10-05 22:24:19 +08001871}
1872
Chao Yud323d002015-10-27 09:53:45 +08001873static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
1874 struct file *filp,
1875 struct f2fs_defragment *range)
1876{
1877 struct inode *inode = file_inode(filp);
Chao Yuda859852016-01-26 15:42:58 +08001878 struct f2fs_map_blocks map = { .m_next_pgofs = NULL };
Chao Yud323d002015-10-27 09:53:45 +08001879 struct extent_info ei;
1880 pgoff_t pg_start, pg_end;
Chao Yu3519e3f2015-12-01 11:56:52 +08001881 unsigned int blk_per_seg = sbi->blocks_per_seg;
Chao Yud323d002015-10-27 09:53:45 +08001882 unsigned int total = 0, sec_num;
Chao Yu3519e3f2015-12-01 11:56:52 +08001883 unsigned int pages_per_sec = sbi->segs_per_sec * blk_per_seg;
Chao Yud323d002015-10-27 09:53:45 +08001884 block_t blk_end = 0;
1885 bool fragmented = false;
1886 int err;
1887
1888 /* if in-place-update policy is enabled, don't waste time here */
1889 if (need_inplace_update(inode))
1890 return -EINVAL;
1891
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001892 pg_start = range->start >> PAGE_SHIFT;
1893 pg_end = (range->start + range->len) >> PAGE_SHIFT;
Chao Yud323d002015-10-27 09:53:45 +08001894
Jaegeuk Kim2c4db1a2016-01-07 14:15:04 -08001895 f2fs_balance_fs(sbi, true);
Chao Yud323d002015-10-27 09:53:45 +08001896
Al Viro59551022016-01-22 15:40:57 -05001897 inode_lock(inode);
Chao Yud323d002015-10-27 09:53:45 +08001898
1899 /* writeback all dirty pages in the range */
1900 err = filemap_write_and_wait_range(inode->i_mapping, range->start,
Fan Lid8fe4f02015-12-14 13:34:00 +08001901 range->start + range->len - 1);
Chao Yud323d002015-10-27 09:53:45 +08001902 if (err)
1903 goto out;
1904
1905 /*
1906 * lookup mapping info in extent cache, skip defragmenting if physical
1907 * block addresses are continuous.
1908 */
1909 if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) {
1910 if (ei.fofs + ei.len >= pg_end)
1911 goto out;
1912 }
1913
1914 map.m_lblk = pg_start;
Chao Yud323d002015-10-27 09:53:45 +08001915
1916 /*
1917 * lookup mapping info in dnode page cache, skip defragmenting if all
1918 * physical block addresses are continuous even if there are hole(s)
1919 * in logical blocks.
1920 */
1921 while (map.m_lblk < pg_end) {
Fan Lia1c1e9b2015-12-15 17:02:41 +08001922 map.m_len = pg_end - map.m_lblk;
Chao Yud323d002015-10-27 09:53:45 +08001923 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ);
1924 if (err)
1925 goto out;
1926
1927 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
1928 map.m_lblk++;
Chao Yud323d002015-10-27 09:53:45 +08001929 continue;
1930 }
1931
1932 if (blk_end && blk_end != map.m_pblk) {
1933 fragmented = true;
1934 break;
1935 }
1936 blk_end = map.m_pblk + map.m_len;
1937
1938 map.m_lblk += map.m_len;
Chao Yud323d002015-10-27 09:53:45 +08001939 }
1940
1941 if (!fragmented)
1942 goto out;
1943
1944 map.m_lblk = pg_start;
1945 map.m_len = pg_end - pg_start;
1946
1947 sec_num = (map.m_len + pages_per_sec - 1) / pages_per_sec;
1948
1949 /*
1950 * make sure there are enough free section for LFS allocation, this can
1951 * avoid defragment running in SSR mode when free section are allocated
1952 * intensively
1953 */
Jaegeuk Kim7f3037a2016-09-01 12:02:51 -07001954 if (has_not_enough_free_secs(sbi, 0, sec_num)) {
Chao Yud323d002015-10-27 09:53:45 +08001955 err = -EAGAIN;
1956 goto out;
1957 }
1958
1959 while (map.m_lblk < pg_end) {
1960 pgoff_t idx;
1961 int cnt = 0;
1962
1963do_map:
Fan Lia1c1e9b2015-12-15 17:02:41 +08001964 map.m_len = pg_end - map.m_lblk;
Chao Yud323d002015-10-27 09:53:45 +08001965 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ);
1966 if (err)
1967 goto clear_out;
1968
1969 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
1970 map.m_lblk++;
1971 continue;
1972 }
1973
Jaegeuk Kim91942322016-05-20 10:13:22 -07001974 set_inode_flag(inode, FI_DO_DEFRAG);
Chao Yud323d002015-10-27 09:53:45 +08001975
1976 idx = map.m_lblk;
1977 while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) {
1978 struct page *page;
1979
1980 page = get_lock_data_page(inode, idx, true);
1981 if (IS_ERR(page)) {
1982 err = PTR_ERR(page);
1983 goto clear_out;
1984 }
1985
1986 set_page_dirty(page);
1987 f2fs_put_page(page, 1);
1988
1989 idx++;
1990 cnt++;
1991 total++;
1992 }
1993
1994 map.m_lblk = idx;
Chao Yud323d002015-10-27 09:53:45 +08001995
1996 if (idx < pg_end && cnt < blk_per_seg)
1997 goto do_map;
1998
Jaegeuk Kim91942322016-05-20 10:13:22 -07001999 clear_inode_flag(inode, FI_DO_DEFRAG);
Chao Yud323d002015-10-27 09:53:45 +08002000
2001 err = filemap_fdatawrite(inode->i_mapping);
2002 if (err)
2003 goto out;
2004 }
2005clear_out:
Jaegeuk Kim91942322016-05-20 10:13:22 -07002006 clear_inode_flag(inode, FI_DO_DEFRAG);
Chao Yud323d002015-10-27 09:53:45 +08002007out:
Al Viro59551022016-01-22 15:40:57 -05002008 inode_unlock(inode);
Chao Yud323d002015-10-27 09:53:45 +08002009 if (!err)
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03002010 range->len = (u64)total << PAGE_SHIFT;
Chao Yud323d002015-10-27 09:53:45 +08002011 return err;
2012}
2013
2014static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
2015{
2016 struct inode *inode = file_inode(filp);
2017 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2018 struct f2fs_defragment range;
2019 int err;
2020
2021 if (!capable(CAP_SYS_ADMIN))
2022 return -EPERM;
2023
2024 if (!S_ISREG(inode->i_mode))
2025 return -EINVAL;
2026
2027 err = mnt_want_write_file(filp);
2028 if (err)
2029 return err;
2030
2031 if (f2fs_readonly(sbi->sb)) {
2032 err = -EROFS;
2033 goto out;
2034 }
2035
2036 if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,
2037 sizeof(range))) {
2038 err = -EFAULT;
2039 goto out;
2040 }
2041
2042 /* verify alignment of offset & size */
2043 if (range.start & (F2FS_BLKSIZE - 1) ||
2044 range.len & (F2FS_BLKSIZE - 1)) {
2045 err = -EINVAL;
2046 goto out;
2047 }
2048
2049 err = f2fs_defragment_range(sbi, filp, &range);
Jaegeuk Kimd0239e12016-01-08 16:57:48 -08002050 f2fs_update_time(sbi, REQ_TIME);
Chao Yud323d002015-10-27 09:53:45 +08002051 if (err < 0)
2052 goto out;
2053
2054 if (copy_to_user((struct f2fs_defragment __user *)arg, &range,
2055 sizeof(range)))
2056 err = -EFAULT;
2057out:
2058 mnt_drop_write_file(filp);
2059 return err;
2060}
2061
Jaegeuk Kim4dd6f972016-07-08 15:16:47 -07002062static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
2063 struct file *file_out, loff_t pos_out, size_t len)
2064{
2065 struct inode *src = file_inode(file_in);
2066 struct inode *dst = file_inode(file_out);
2067 struct f2fs_sb_info *sbi = F2FS_I_SB(src);
2068 size_t olen = len, dst_max_i_size = 0;
2069 size_t dst_osize;
2070 int ret;
2071
2072 if (file_in->f_path.mnt != file_out->f_path.mnt ||
2073 src->i_sb != dst->i_sb)
2074 return -EXDEV;
2075
2076 if (unlikely(f2fs_readonly(src->i_sb)))
2077 return -EROFS;
2078
Chao Yufe8494b2016-08-04 20:13:02 +08002079 if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
2080 return -EINVAL;
Jaegeuk Kim4dd6f972016-07-08 15:16:47 -07002081
2082 if (f2fs_encrypted_inode(src) || f2fs_encrypted_inode(dst))
2083 return -EOPNOTSUPP;
2084
Fan Lid95fd912016-09-13 11:35:42 +08002085 if (src == dst) {
2086 if (pos_in == pos_out)
2087 return 0;
2088 if (pos_out > pos_in && pos_out < pos_in + len)
2089 return -EINVAL;
2090 }
2091
Jaegeuk Kim4dd6f972016-07-08 15:16:47 -07002092 inode_lock(src);
Chao Yu20a3d612016-08-04 20:13:03 +08002093 if (src != dst) {
2094 if (!inode_trylock(dst)) {
2095 ret = -EBUSY;
2096 goto out;
2097 }
2098 }
Jaegeuk Kim4dd6f972016-07-08 15:16:47 -07002099
2100 ret = -EINVAL;
2101 if (pos_in + len > src->i_size || pos_in + len < pos_in)
2102 goto out_unlock;
2103 if (len == 0)
2104 olen = len = src->i_size - pos_in;
2105 if (pos_in + len == src->i_size)
2106 len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in;
2107 if (len == 0) {
2108 ret = 0;
2109 goto out_unlock;
2110 }
2111
2112 dst_osize = dst->i_size;
2113 if (pos_out + olen > dst->i_size)
2114 dst_max_i_size = pos_out + olen;
2115
2116 /* verify the end result is block aligned */
2117 if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) ||
2118 !IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) ||
2119 !IS_ALIGNED(pos_out, F2FS_BLKSIZE))
2120 goto out_unlock;
2121
2122 ret = f2fs_convert_inline_inode(src);
2123 if (ret)
2124 goto out_unlock;
2125
2126 ret = f2fs_convert_inline_inode(dst);
2127 if (ret)
2128 goto out_unlock;
2129
2130 /* write out all dirty pages from offset */
2131 ret = filemap_write_and_wait_range(src->i_mapping,
2132 pos_in, pos_in + len);
2133 if (ret)
2134 goto out_unlock;
2135
2136 ret = filemap_write_and_wait_range(dst->i_mapping,
2137 pos_out, pos_out + len);
2138 if (ret)
2139 goto out_unlock;
2140
2141 f2fs_balance_fs(sbi, true);
2142 f2fs_lock_op(sbi);
Fan Li61e4da12016-09-10 11:19:37 +08002143 ret = __exchange_data_block(src, dst, pos_in >> F2FS_BLKSIZE_BITS,
2144 pos_out >> F2FS_BLKSIZE_BITS,
2145 len >> F2FS_BLKSIZE_BITS, false);
Jaegeuk Kim4dd6f972016-07-08 15:16:47 -07002146
2147 if (!ret) {
2148 if (dst_max_i_size)
2149 f2fs_i_size_write(dst, dst_max_i_size);
2150 else if (dst_osize != dst->i_size)
2151 f2fs_i_size_write(dst, dst_osize);
2152 }
2153 f2fs_unlock_op(sbi);
2154out_unlock:
2155 if (src != dst)
2156 inode_unlock(dst);
Chao Yu20a3d612016-08-04 20:13:03 +08002157out:
Jaegeuk Kim4dd6f972016-07-08 15:16:47 -07002158 inode_unlock(src);
2159 return ret;
2160}
2161
2162static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)
2163{
2164 struct f2fs_move_range range;
2165 struct fd dst;
2166 int err;
2167
2168 if (!(filp->f_mode & FMODE_READ) ||
2169 !(filp->f_mode & FMODE_WRITE))
2170 return -EBADF;
2171
2172 if (copy_from_user(&range, (struct f2fs_move_range __user *)arg,
2173 sizeof(range)))
2174 return -EFAULT;
2175
2176 dst = fdget(range.dst_fd);
2177 if (!dst.file)
2178 return -EBADF;
2179
2180 if (!(dst.file->f_mode & FMODE_WRITE)) {
2181 err = -EBADF;
2182 goto err_out;
2183 }
2184
2185 err = mnt_want_write_file(filp);
2186 if (err)
2187 goto err_out;
2188
2189 err = f2fs_move_file_range(filp, range.pos_in, dst.file,
2190 range.pos_out, range.len);
2191
2192 mnt_drop_write_file(filp);
2193
2194 if (copy_to_user((struct f2fs_move_range __user *)arg,
2195 &range, sizeof(range)))
2196 err = -EFAULT;
2197err_out:
2198 fdput(dst);
2199 return err;
2200}
2201
Jaegeuk Kim52656e62014-09-24 15:37:02 -07002202long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
2203{
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09002204 switch (cmd) {
Namjae Jeon6a3e8ef2013-06-08 21:25:28 +09002205 case F2FS_IOC_GETFLAGS:
Jaegeuk Kim52656e62014-09-24 15:37:02 -07002206 return f2fs_ioc_getflags(filp, arg);
Namjae Jeon6a3e8ef2013-06-08 21:25:28 +09002207 case F2FS_IOC_SETFLAGS:
Jaegeuk Kim52656e62014-09-24 15:37:02 -07002208 return f2fs_ioc_setflags(filp, arg);
Chao Yud49f3e82015-01-23 20:36:04 +08002209 case F2FS_IOC_GETVERSION:
2210 return f2fs_ioc_getversion(filp, arg);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -07002211 case F2FS_IOC_START_ATOMIC_WRITE:
2212 return f2fs_ioc_start_atomic_write(filp);
2213 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
2214 return f2fs_ioc_commit_atomic_write(filp);
Jaegeuk Kim02a13352014-10-06 16:11:16 -07002215 case F2FS_IOC_START_VOLATILE_WRITE:
2216 return f2fs_ioc_start_volatile_write(filp);
Jaegeuk Kim1e843712014-12-09 06:08:59 -08002217 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
2218 return f2fs_ioc_release_volatile_write(filp);
2219 case F2FS_IOC_ABORT_VOLATILE_WRITE:
2220 return f2fs_ioc_abort_volatile_write(filp);
Jaegeuk Kim1abff932015-01-08 19:15:53 -08002221 case F2FS_IOC_SHUTDOWN:
2222 return f2fs_ioc_shutdown(filp, arg);
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -07002223 case FITRIM:
Jaegeuk Kim52656e62014-09-24 15:37:02 -07002224 return f2fs_ioc_fitrim(filp, arg);
Jaegeuk Kimf424f662015-04-20 15:19:06 -07002225 case F2FS_IOC_SET_ENCRYPTION_POLICY:
2226 return f2fs_ioc_set_encryption_policy(filp, arg);
2227 case F2FS_IOC_GET_ENCRYPTION_POLICY:
2228 return f2fs_ioc_get_encryption_policy(filp, arg);
2229 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
2230 return f2fs_ioc_get_encryption_pwsalt(filp, arg);
Chao Yuc1c1b582015-07-10 18:08:10 +08002231 case F2FS_IOC_GARBAGE_COLLECT:
2232 return f2fs_ioc_gc(filp, arg);
Chao Yu456b88e2015-10-05 22:24:19 +08002233 case F2FS_IOC_WRITE_CHECKPOINT:
2234 return f2fs_ioc_write_checkpoint(filp, arg);
Chao Yud323d002015-10-27 09:53:45 +08002235 case F2FS_IOC_DEFRAGMENT:
2236 return f2fs_ioc_defragment(filp, arg);
Jaegeuk Kim4dd6f972016-07-08 15:16:47 -07002237 case F2FS_IOC_MOVE_RANGE:
2238 return f2fs_ioc_move_range(filp, arg);
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09002239 default:
2240 return -ENOTTY;
2241 }
2242}
2243
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -07002244static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
2245{
Jaegeuk Kimb439b102016-02-03 13:09:09 -08002246 struct file *file = iocb->ki_filp;
2247 struct inode *inode = file_inode(file);
Jaegeuk Kim9dfa1ba2016-07-13 19:33:19 -07002248 struct blk_plug plug;
Jaegeuk Kimb439b102016-02-03 13:09:09 -08002249 ssize_t ret;
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -07002250
2251 if (f2fs_encrypted_inode(inode) &&
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07002252 !fscrypt_has_encryption_key(inode) &&
2253 fscrypt_get_encryption_info(inode))
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -07002254 return -EACCES;
2255
Jaegeuk Kimb439b102016-02-03 13:09:09 -08002256 inode_lock(inode);
2257 ret = generic_write_checks(iocb, from);
2258 if (ret > 0) {
2259 ret = f2fs_preallocate_blocks(iocb, from);
Jaegeuk Kim9dfa1ba2016-07-13 19:33:19 -07002260 if (!ret) {
2261 blk_start_plug(&plug);
Jaegeuk Kimb439b102016-02-03 13:09:09 -08002262 ret = __generic_file_write_iter(iocb, from);
Jaegeuk Kim9dfa1ba2016-07-13 19:33:19 -07002263 blk_finish_plug(&plug);
2264 }
Jaegeuk Kimb439b102016-02-03 13:09:09 -08002265 }
2266 inode_unlock(inode);
2267
Christoph Hellwige2592212016-04-07 08:52:01 -07002268 if (ret > 0)
2269 ret = generic_write_sync(iocb, ret);
Jaegeuk Kimb439b102016-02-03 13:09:09 -08002270 return ret;
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -07002271}
2272
Namjae Jeone9750822013-02-04 23:41:41 +09002273#ifdef CONFIG_COMPAT
2274long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2275{
2276 switch (cmd) {
2277 case F2FS_IOC32_GETFLAGS:
2278 cmd = F2FS_IOC_GETFLAGS;
2279 break;
2280 case F2FS_IOC32_SETFLAGS:
2281 cmd = F2FS_IOC_SETFLAGS;
2282 break;
Chao Yu04ef4b62015-11-10 18:44:20 +08002283 case F2FS_IOC32_GETVERSION:
2284 cmd = F2FS_IOC_GETVERSION;
2285 break;
2286 case F2FS_IOC_START_ATOMIC_WRITE:
2287 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
2288 case F2FS_IOC_START_VOLATILE_WRITE:
2289 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
2290 case F2FS_IOC_ABORT_VOLATILE_WRITE:
2291 case F2FS_IOC_SHUTDOWN:
2292 case F2FS_IOC_SET_ENCRYPTION_POLICY:
2293 case F2FS_IOC_GET_ENCRYPTION_PWSALT:
2294 case F2FS_IOC_GET_ENCRYPTION_POLICY:
2295 case F2FS_IOC_GARBAGE_COLLECT:
2296 case F2FS_IOC_WRITE_CHECKPOINT:
2297 case F2FS_IOC_DEFRAGMENT:
2298 break;
Jaegeuk Kim4dd6f972016-07-08 15:16:47 -07002299 case F2FS_IOC_MOVE_RANGE:
2300 break;
Namjae Jeone9750822013-02-04 23:41:41 +09002301 default:
2302 return -ENOIOCTLCMD;
2303 }
2304 return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
2305}
2306#endif
2307
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09002308const struct file_operations f2fs_file_operations = {
Chao Yu267378d2014-04-23 14:10:24 +08002309 .llseek = f2fs_llseek,
Al Viroaad4f8b2014-04-02 14:33:16 -04002310 .read_iter = generic_file_read_iter,
Jaegeuk Kimfcc85a42015-04-21 20:39:58 -07002311 .write_iter = f2fs_file_write_iter,
2312 .open = f2fs_file_open,
Jaegeuk Kim12662232014-12-05 14:37:37 -08002313 .release = f2fs_release_file,
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09002314 .mmap = f2fs_file_mmap,
2315 .fsync = f2fs_sync_file,
2316 .fallocate = f2fs_fallocate,
2317 .unlocked_ioctl = f2fs_ioctl,
Namjae Jeone9750822013-02-04 23:41:41 +09002318#ifdef CONFIG_COMPAT
2319 .compat_ioctl = f2fs_compat_ioctl,
2320#endif
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09002321 .splice_read = generic_file_splice_read,
Al Viro8d020762014-04-05 04:27:08 -04002322 .splice_write = iter_file_splice_write,
Jaegeuk Kimfbfa2cc2012-11-02 17:09:44 +09002323};