Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1 | /* |
| 2 | * 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> |
| 16 | #include <linux/blkdev.h> |
| 17 | #include <linux/falloc.h> |
| 18 | #include <linux/types.h> |
| 19 | #include <linux/compat.h> |
| 20 | #include <linux/uaccess.h> |
| 21 | #include <linux/mount.h> |
| 22 | #include <linux/pagevec.h> |
| 23 | #include <linux/random.h> |
Jaegeuk Kim | 78c564b | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 24 | #include <linux/aio.h> |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 25 | |
| 26 | #include "f2fs.h" |
| 27 | #include "node.h" |
| 28 | #include "segment.h" |
| 29 | #include "xattr.h" |
| 30 | #include "acl.h" |
| 31 | #include "gc.h" |
| 32 | #include "trace.h" |
| 33 | #include <trace/events/f2fs.h> |
| 34 | |
| 35 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, |
| 36 | struct vm_fault *vmf) |
| 37 | { |
| 38 | struct page *page = vmf->page; |
| 39 | struct inode *inode = file_inode(vma->vm_file); |
| 40 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 41 | struct dnode_of_data dn; |
| 42 | int err; |
| 43 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 44 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
| 45 | |
| 46 | f2fs_bug_on(sbi, f2fs_has_inline_data(inode)); |
| 47 | |
| 48 | /* block allocation */ |
| 49 | f2fs_lock_op(sbi); |
| 50 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 51 | 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); |
| 58 | |
Jaegeuk Kim | ab40597 | 2016-01-07 14:15:04 -0800 | [diff] [blame] | 59 | f2fs_balance_fs(sbi, dn.node_changed); |
Jaegeuk Kim | 9755a87 | 2015-12-22 13:23:35 -0800 | [diff] [blame] | 60 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 61 | file_update_time(vma->vm_file); |
| 62 | lock_page(page); |
| 63 | if (unlikely(page->mapping != inode->i_mapping || |
| 64 | page_offset(page) > i_size_read(inode) || |
| 65 | !PageUptodate(page))) { |
| 66 | 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)) |
| 75 | goto mapped; |
| 76 | |
| 77 | /* page is wholly or partially inside EOF */ |
| 78 | if (((loff_t)(page->index + 1) << PAGE_CACHE_SHIFT) > |
| 79 | i_size_read(inode)) { |
| 80 | unsigned offset; |
| 81 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; |
| 82 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
| 83 | } |
| 84 | set_page_dirty(page); |
| 85 | SetPageUptodate(page); |
| 86 | |
| 87 | trace_f2fs_vm_page_mkwrite(page, DATA); |
| 88 | mapped: |
| 89 | /* fill the page */ |
Jaegeuk Kim | 3e0b2f4 | 2016-01-20 23:43:51 +0800 | [diff] [blame] | 90 | f2fs_wait_on_page_writeback(page, DATA, false); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 91 | |
| 92 | /* wait for GCed encrypted page writeback */ |
| 93 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
| 94 | f2fs_wait_on_encrypted_page_writeback(sbi, dn.data_blkaddr); |
| 95 | |
| 96 | /* if gced page is attached, don't write to cold segment */ |
| 97 | clear_cold_data(page); |
| 98 | out: |
Jaegeuk Kim | 2c88a92 | 2016-01-08 16:57:48 -0800 | [diff] [blame] | 99 | f2fs_update_time(sbi, REQ_TIME); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 100 | return block_page_mkwrite_return(err); |
| 101 | } |
| 102 | |
| 103 | static const struct vm_operations_struct f2fs_file_vm_ops = { |
| 104 | .fault = filemap_fault, |
| 105 | .page_mkwrite = f2fs_vm_page_mkwrite, |
| 106 | }; |
| 107 | |
| 108 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
| 109 | { |
| 110 | struct dentry *dentry; |
| 111 | |
| 112 | inode = igrab(inode); |
| 113 | dentry = d_find_any_alias(inode); |
| 114 | iput(inode); |
| 115 | if (!dentry) |
| 116 | return 0; |
| 117 | |
| 118 | if (update_dent_inode(inode, inode, &dentry->d_name)) { |
| 119 | dput(dentry); |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | *pino = parent_ino(dentry); |
| 124 | dput(dentry); |
| 125 | return 1; |
| 126 | } |
| 127 | |
| 128 | static inline bool need_do_checkpoint(struct inode *inode) |
| 129 | { |
| 130 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 131 | bool need_cp = false; |
| 132 | |
| 133 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
| 134 | need_cp = true; |
| 135 | else if (file_enc_name(inode) && need_dentry_mark(sbi, inode->i_ino)) |
| 136 | need_cp = true; |
| 137 | else if (file_wrong_pino(inode)) |
| 138 | need_cp = true; |
| 139 | else if (!space_for_roll_forward(sbi)) |
| 140 | need_cp = true; |
| 141 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
| 142 | need_cp = true; |
| 143 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) |
| 144 | need_cp = true; |
| 145 | else if (test_opt(sbi, FASTBOOT)) |
| 146 | need_cp = true; |
| 147 | else if (sbi->active_logs == 2) |
| 148 | need_cp = true; |
| 149 | |
| 150 | return need_cp; |
| 151 | } |
| 152 | |
| 153 | static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino) |
| 154 | { |
| 155 | struct page *i = find_get_page(NODE_MAPPING(sbi), ino); |
| 156 | bool ret = false; |
| 157 | /* But we need to avoid that there are some inode updates */ |
| 158 | if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) |
| 159 | ret = true; |
| 160 | f2fs_put_page(i, 0); |
| 161 | return ret; |
| 162 | } |
| 163 | |
| 164 | static void try_to_fix_pino(struct inode *inode) |
| 165 | { |
| 166 | struct f2fs_inode_info *fi = F2FS_I(inode); |
| 167 | nid_t pino; |
| 168 | |
| 169 | down_write(&fi->i_sem); |
| 170 | fi->xattr_ver = 0; |
| 171 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
| 172 | get_parent_ino(inode, &pino)) { |
| 173 | fi->i_pino = pino; |
| 174 | file_got_pino(inode); |
| 175 | up_write(&fi->i_sem); |
| 176 | |
| 177 | mark_inode_dirty_sync(inode); |
| 178 | f2fs_write_inode(inode, NULL); |
| 179 | } else { |
| 180 | up_write(&fi->i_sem); |
| 181 | } |
| 182 | } |
| 183 | |
Jaegeuk Kim | a6b9f22 | 2016-04-15 09:43:17 -0700 | [diff] [blame] | 184 | static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end, |
| 185 | int datasync, bool atomic) |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 186 | { |
| 187 | struct inode *inode = file->f_mapping->host; |
| 188 | struct f2fs_inode_info *fi = F2FS_I(inode); |
| 189 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 190 | nid_t ino = inode->i_ino; |
| 191 | int ret = 0; |
| 192 | bool need_cp = false; |
| 193 | struct writeback_control wbc = { |
| 194 | .sync_mode = WB_SYNC_ALL, |
| 195 | .nr_to_write = LONG_MAX, |
| 196 | .for_reclaim = 0, |
| 197 | }; |
| 198 | |
| 199 | if (unlikely(f2fs_readonly(inode->i_sb))) |
| 200 | return 0; |
| 201 | |
| 202 | trace_f2fs_sync_file_enter(inode); |
| 203 | |
| 204 | /* if fdatasync is triggered, let's do in-place-update */ |
Jaegeuk Kim | 3943cfb | 2015-12-31 13:49:17 -0800 | [diff] [blame] | 205 | if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks) |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 206 | set_inode_flag(fi, FI_NEED_IPU); |
| 207 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
| 208 | clear_inode_flag(fi, FI_NEED_IPU); |
| 209 | |
| 210 | if (ret) { |
| 211 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
| 212 | return ret; |
| 213 | } |
| 214 | |
| 215 | /* if the inode is dirty, let's recover all the time */ |
| 216 | if (!datasync) { |
| 217 | f2fs_write_inode(inode, NULL); |
| 218 | goto go_write; |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * if there is no written data, don't waste time to write recovery info. |
| 223 | */ |
| 224 | if (!is_inode_flag_set(fi, FI_APPEND_WRITE) && |
| 225 | !exist_written_data(sbi, ino, APPEND_INO)) { |
| 226 | |
| 227 | /* it may call write_inode just prior to fsync */ |
| 228 | if (need_inode_page_update(sbi, ino)) |
| 229 | goto go_write; |
| 230 | |
| 231 | if (is_inode_flag_set(fi, FI_UPDATE_WRITE) || |
| 232 | exist_written_data(sbi, ino, UPDATE_INO)) |
| 233 | goto flush_out; |
| 234 | goto out; |
| 235 | } |
| 236 | go_write: |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 237 | /* |
| 238 | * Both of fdatasync() and fsync() are able to be recovered from |
| 239 | * sudden-power-off. |
| 240 | */ |
| 241 | down_read(&fi->i_sem); |
| 242 | need_cp = need_do_checkpoint(inode); |
| 243 | up_read(&fi->i_sem); |
| 244 | |
| 245 | if (need_cp) { |
| 246 | /* all the dirty node pages should be flushed for POR */ |
| 247 | ret = f2fs_sync_fs(inode->i_sb, 1); |
| 248 | |
| 249 | /* |
| 250 | * We've secured consistency through sync_fs. Following pino |
| 251 | * will be used only for fsynced inodes after checkpoint. |
| 252 | */ |
| 253 | try_to_fix_pino(inode); |
| 254 | clear_inode_flag(fi, FI_APPEND_WRITE); |
| 255 | clear_inode_flag(fi, FI_UPDATE_WRITE); |
| 256 | goto out; |
| 257 | } |
| 258 | sync_nodes: |
Jaegeuk Kim | a6b9f22 | 2016-04-15 09:43:17 -0700 | [diff] [blame] | 259 | ret = fsync_node_pages(sbi, ino, &wbc, atomic); |
Jaegeuk Kim | 17b8891 | 2016-04-15 09:25:04 -0700 | [diff] [blame] | 260 | if (ret) |
| 261 | goto out; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 262 | |
| 263 | /* if cp_error was enabled, we should avoid infinite loop */ |
Chao Yu | 167a316 | 2015-12-24 18:04:56 +0800 | [diff] [blame] | 264 | if (unlikely(f2fs_cp_error(sbi))) { |
| 265 | ret = -EIO; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 266 | goto out; |
Chao Yu | 167a316 | 2015-12-24 18:04:56 +0800 | [diff] [blame] | 267 | } |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 268 | |
| 269 | if (need_inode_block_update(sbi, ino)) { |
| 270 | mark_inode_dirty_sync(inode); |
| 271 | f2fs_write_inode(inode, NULL); |
| 272 | goto sync_nodes; |
| 273 | } |
| 274 | |
| 275 | ret = wait_on_node_pages_writeback(sbi, ino); |
| 276 | if (ret) |
| 277 | goto out; |
| 278 | |
| 279 | /* once recovery info is written, don't need to tack this */ |
Chao Yu | dbc32c2 | 2015-12-15 13:29:47 +0800 | [diff] [blame] | 280 | remove_ino_entry(sbi, ino, APPEND_INO); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 281 | clear_inode_flag(fi, FI_APPEND_WRITE); |
| 282 | flush_out: |
Chao Yu | dbc32c2 | 2015-12-15 13:29:47 +0800 | [diff] [blame] | 283 | remove_ino_entry(sbi, ino, UPDATE_INO); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 284 | clear_inode_flag(fi, FI_UPDATE_WRITE); |
| 285 | ret = f2fs_issue_flush(sbi); |
Jaegeuk Kim | 2c88a92 | 2016-01-08 16:57:48 -0800 | [diff] [blame] | 286 | f2fs_update_time(sbi, REQ_TIME); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 287 | out: |
| 288 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
| 289 | f2fs_trace_ios(NULL, 1); |
| 290 | return ret; |
| 291 | } |
| 292 | |
Jaegeuk Kim | a6b9f22 | 2016-04-15 09:43:17 -0700 | [diff] [blame] | 293 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
| 294 | { |
| 295 | return f2fs_do_sync_file(file, start, end, datasync, false); |
| 296 | } |
| 297 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 298 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
| 299 | pgoff_t pgofs, int whence) |
| 300 | { |
| 301 | struct pagevec pvec; |
| 302 | int nr_pages; |
| 303 | |
| 304 | if (whence != SEEK_DATA) |
| 305 | return 0; |
| 306 | |
| 307 | /* find first dirty page index */ |
| 308 | pagevec_init(&pvec, 0); |
| 309 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, |
| 310 | PAGECACHE_TAG_DIRTY, 1); |
Chao Yu | fab3b54 | 2016-02-24 17:20:44 +0800 | [diff] [blame] | 311 | pgofs = nr_pages ? pvec.pages[0]->index : ULONG_MAX; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 312 | pagevec_release(&pvec); |
| 313 | return pgofs; |
| 314 | } |
| 315 | |
| 316 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, |
| 317 | int whence) |
| 318 | { |
| 319 | switch (whence) { |
| 320 | case SEEK_DATA: |
| 321 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || |
| 322 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) |
| 323 | return true; |
| 324 | break; |
| 325 | case SEEK_HOLE: |
| 326 | if (blkaddr == NULL_ADDR) |
| 327 | return true; |
| 328 | break; |
| 329 | } |
| 330 | return false; |
| 331 | } |
| 332 | |
| 333 | static inline int unsigned_offsets(struct file *file) |
| 334 | { |
| 335 | return file->f_mode & FMODE_UNSIGNED_OFFSET; |
| 336 | } |
| 337 | |
| 338 | static loff_t vfs_setpos(struct file *file, loff_t offset, loff_t maxsize) |
| 339 | { |
| 340 | if (offset < 0 && !unsigned_offsets(file)) |
| 341 | return -EINVAL; |
| 342 | if (offset > maxsize) |
| 343 | return -EINVAL; |
| 344 | |
| 345 | if (offset != file->f_pos) { |
| 346 | file->f_pos = offset; |
| 347 | file->f_version = 0; |
| 348 | } |
| 349 | return offset; |
| 350 | } |
| 351 | |
| 352 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
| 353 | { |
| 354 | struct inode *inode = file->f_mapping->host; |
| 355 | loff_t maxbytes = inode->i_sb->s_maxbytes; |
| 356 | struct dnode_of_data dn; |
| 357 | pgoff_t pgofs, end_offset, dirty; |
| 358 | loff_t data_ofs = offset; |
| 359 | loff_t isize; |
| 360 | int err = 0; |
| 361 | |
| 362 | mutex_lock(&inode->i_mutex); |
| 363 | |
| 364 | isize = i_size_read(inode); |
| 365 | if (offset >= isize) |
| 366 | goto fail; |
| 367 | |
| 368 | /* handle inline data case */ |
| 369 | if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) { |
| 370 | if (whence == SEEK_HOLE) |
| 371 | data_ofs = isize; |
| 372 | goto found; |
| 373 | } |
| 374 | |
| 375 | pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT); |
| 376 | |
| 377 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
| 378 | |
| 379 | for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_CACHE_SHIFT) { |
| 380 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 381 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA); |
| 382 | if (err && err != -ENOENT) { |
| 383 | goto fail; |
| 384 | } else if (err == -ENOENT) { |
| 385 | /* direct node does not exists */ |
| 386 | if (whence == SEEK_DATA) { |
Chao Yu | e9f9685 | 2016-01-26 15:40:44 +0800 | [diff] [blame] | 387 | pgofs = get_next_page_offset(&dn, pgofs); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 388 | continue; |
| 389 | } else { |
| 390 | goto found; |
| 391 | } |
| 392 | } |
| 393 | |
Chao Yu | 9ff6fa2 | 2016-01-26 15:39:35 +0800 | [diff] [blame] | 394 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 395 | |
| 396 | /* find data/hole in dnode block */ |
| 397 | for (; dn.ofs_in_node < end_offset; |
| 398 | dn.ofs_in_node++, pgofs++, |
| 399 | data_ofs = (loff_t)pgofs << PAGE_CACHE_SHIFT) { |
| 400 | block_t blkaddr; |
| 401 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
| 402 | |
| 403 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
| 404 | f2fs_put_dnode(&dn); |
| 405 | goto found; |
| 406 | } |
| 407 | } |
| 408 | f2fs_put_dnode(&dn); |
| 409 | } |
| 410 | |
| 411 | if (whence == SEEK_DATA) |
| 412 | goto fail; |
| 413 | found: |
| 414 | if (whence == SEEK_HOLE && data_ofs > isize) |
| 415 | data_ofs = isize; |
| 416 | mutex_unlock(&inode->i_mutex); |
| 417 | return vfs_setpos(file, data_ofs, maxbytes); |
| 418 | fail: |
| 419 | mutex_unlock(&inode->i_mutex); |
| 420 | return -ENXIO; |
| 421 | } |
| 422 | |
| 423 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) |
| 424 | { |
| 425 | struct inode *inode = file->f_mapping->host; |
| 426 | loff_t maxbytes = inode->i_sb->s_maxbytes; |
| 427 | |
| 428 | switch (whence) { |
| 429 | case SEEK_SET: |
| 430 | case SEEK_CUR: |
| 431 | case SEEK_END: |
| 432 | return generic_file_llseek_size(file, offset, whence, |
| 433 | maxbytes); |
| 434 | case SEEK_DATA: |
| 435 | case SEEK_HOLE: |
| 436 | if (offset < 0) |
| 437 | return -ENXIO; |
| 438 | return f2fs_seek_block(file, offset, whence); |
| 439 | } |
| 440 | |
| 441 | return -EINVAL; |
| 442 | } |
| 443 | |
| 444 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
| 445 | { |
| 446 | struct inode *inode = file_inode(file); |
Jaegeuk Kim | a15a51b | 2015-12-22 11:09:35 -0800 | [diff] [blame] | 447 | int err; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 448 | |
| 449 | if (f2fs_encrypted_inode(inode)) { |
Jaegeuk Kim | 86e0d58 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 450 | err = fscrypt_get_encryption_info(inode); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 451 | if (err) |
| 452 | return 0; |
Chao Yu | 047d42e | 2016-02-14 18:58:35 +0800 | [diff] [blame] | 453 | if (!f2fs_encrypted_inode(inode)) |
| 454 | return -ENOKEY; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 455 | } |
| 456 | |
| 457 | /* we don't need to use inline_data strictly */ |
Jaegeuk Kim | a15a51b | 2015-12-22 11:09:35 -0800 | [diff] [blame] | 458 | err = f2fs_convert_inline_inode(inode); |
| 459 | if (err) |
| 460 | return err; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 461 | |
| 462 | file_accessed(file); |
| 463 | vma->vm_ops = &f2fs_file_vm_ops; |
| 464 | return 0; |
| 465 | } |
| 466 | |
| 467 | static int f2fs_file_open(struct inode *inode, struct file *filp) |
| 468 | { |
| 469 | int ret = generic_file_open(inode, filp); |
Jaegeuk Kim | ebd7770 | 2016-04-11 15:15:38 -0700 | [diff] [blame] | 470 | struct dentry *dir; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 471 | |
| 472 | if (!ret && f2fs_encrypted_inode(inode)) { |
Jaegeuk Kim | 86e0d58 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 473 | ret = fscrypt_get_encryption_info(inode); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 474 | if (ret) |
Chao Yu | 047d42e | 2016-02-14 18:58:35 +0800 | [diff] [blame] | 475 | return -EACCES; |
Jaegeuk Kim | 86e0d58 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 476 | if (!fscrypt_has_encryption_key(inode)) |
Chao Yu | 047d42e | 2016-02-14 18:58:35 +0800 | [diff] [blame] | 477 | return -ENOKEY; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 478 | } |
Jaegeuk Kim | ebd7770 | 2016-04-11 15:15:38 -0700 | [diff] [blame] | 479 | dir = dget_parent(filp->f_path.dentry); |
| 480 | if (f2fs_encrypted_inode(dir->d_inode) && |
| 481 | !fscrypt_has_permitted_context(dir->d_inode, inode)) { |
| 482 | dput(dir); |
Jaegeuk Kim | 0cc23e0 | 2016-02-23 09:21:37 -0800 | [diff] [blame] | 483 | return -EPERM; |
Jaegeuk Kim | ebd7770 | 2016-04-11 15:15:38 -0700 | [diff] [blame] | 484 | } |
| 485 | dput(dir); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 486 | return ret; |
| 487 | } |
| 488 | |
| 489 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
| 490 | { |
| 491 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
| 492 | struct f2fs_node *raw_node; |
| 493 | int nr_free = 0, ofs = dn->ofs_in_node, len = count; |
| 494 | __le32 *addr; |
| 495 | |
| 496 | raw_node = F2FS_NODE(dn->node_page); |
| 497 | addr = blkaddr_in_node(raw_node) + ofs; |
| 498 | |
| 499 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
| 500 | block_t blkaddr = le32_to_cpu(*addr); |
| 501 | if (blkaddr == NULL_ADDR) |
| 502 | continue; |
| 503 | |
| 504 | dn->data_blkaddr = NULL_ADDR; |
| 505 | set_data_blkaddr(dn); |
| 506 | invalidate_blocks(sbi, blkaddr); |
| 507 | if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page)) |
| 508 | clear_inode_flag(F2FS_I(dn->inode), |
| 509 | FI_FIRST_BLOCK_WRITTEN); |
| 510 | nr_free++; |
| 511 | } |
| 512 | |
| 513 | if (nr_free) { |
| 514 | pgoff_t fofs; |
| 515 | /* |
| 516 | * once we invalidate valid blkaddr in range [ofs, ofs + count], |
| 517 | * we will invalidate all blkaddr in the whole range. |
| 518 | */ |
| 519 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), |
Chao Yu | 9ff6fa2 | 2016-01-26 15:39:35 +0800 | [diff] [blame] | 520 | dn->inode) + ofs; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 521 | f2fs_update_extent_cache_range(dn, fofs, 0, len); |
| 522 | dec_valid_block_count(sbi, dn->inode, nr_free); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 523 | sync_inode_page(dn); |
| 524 | } |
| 525 | dn->ofs_in_node = ofs; |
| 526 | |
Jaegeuk Kim | 2c88a92 | 2016-01-08 16:57:48 -0800 | [diff] [blame] | 527 | f2fs_update_time(sbi, REQ_TIME); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 528 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, |
| 529 | dn->ofs_in_node, nr_free); |
| 530 | return nr_free; |
| 531 | } |
| 532 | |
| 533 | void truncate_data_blocks(struct dnode_of_data *dn) |
| 534 | { |
| 535 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); |
| 536 | } |
| 537 | |
| 538 | static int truncate_partial_data_page(struct inode *inode, u64 from, |
| 539 | bool cache_only) |
| 540 | { |
| 541 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); |
| 542 | pgoff_t index = from >> PAGE_CACHE_SHIFT; |
| 543 | struct address_space *mapping = inode->i_mapping; |
| 544 | struct page *page; |
| 545 | |
| 546 | if (!offset && !cache_only) |
| 547 | return 0; |
| 548 | |
| 549 | if (cache_only) { |
| 550 | page = f2fs_grab_cache_page(mapping, index, false); |
| 551 | if (page && PageUptodate(page)) |
| 552 | goto truncate_out; |
| 553 | f2fs_put_page(page, 1); |
| 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | page = get_lock_data_page(inode, index, true); |
| 558 | if (IS_ERR(page)) |
| 559 | return 0; |
| 560 | truncate_out: |
Jaegeuk Kim | 3e0b2f4 | 2016-01-20 23:43:51 +0800 | [diff] [blame] | 561 | f2fs_wait_on_page_writeback(page, DATA, true); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 562 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); |
Jaegeuk Kim | 86e0d58 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 563 | if (!cache_only || !f2fs_encrypted_inode(inode) || |
| 564 | !S_ISREG(inode->i_mode)) |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 565 | set_page_dirty(page); |
| 566 | f2fs_put_page(page, 1); |
| 567 | return 0; |
| 568 | } |
| 569 | |
| 570 | int truncate_blocks(struct inode *inode, u64 from, bool lock) |
| 571 | { |
| 572 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 573 | unsigned int blocksize = inode->i_sb->s_blocksize; |
| 574 | struct dnode_of_data dn; |
| 575 | pgoff_t free_from; |
| 576 | int count = 0, err = 0; |
| 577 | struct page *ipage; |
| 578 | bool truncate_page = false; |
| 579 | |
| 580 | trace_f2fs_truncate_blocks_enter(inode, from); |
| 581 | |
| 582 | free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1); |
| 583 | |
Chao Yu | 8063cc7 | 2016-05-05 19:13:03 +0800 | [diff] [blame] | 584 | if (free_from >= sbi->max_file_blocks) |
| 585 | goto free_partial; |
| 586 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 587 | if (lock) |
| 588 | f2fs_lock_op(sbi); |
| 589 | |
| 590 | ipage = get_node_page(sbi, inode->i_ino); |
| 591 | if (IS_ERR(ipage)) { |
| 592 | err = PTR_ERR(ipage); |
| 593 | goto out; |
| 594 | } |
| 595 | |
| 596 | if (f2fs_has_inline_data(inode)) { |
| 597 | if (truncate_inline_inode(ipage, from)) |
| 598 | set_page_dirty(ipage); |
| 599 | f2fs_put_page(ipage, 1); |
| 600 | truncate_page = true; |
| 601 | goto out; |
| 602 | } |
| 603 | |
| 604 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
Jaegeuk Kim | 91237b7 | 2016-05-06 16:19:43 -0700 | [diff] [blame^] | 605 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 606 | if (err) { |
| 607 | if (err == -ENOENT) |
| 608 | goto free_next; |
| 609 | goto out; |
| 610 | } |
| 611 | |
Chao Yu | 9ff6fa2 | 2016-01-26 15:39:35 +0800 | [diff] [blame] | 612 | count = ADDRS_PER_PAGE(dn.node_page, inode); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 613 | |
| 614 | count -= dn.ofs_in_node; |
| 615 | f2fs_bug_on(sbi, count < 0); |
| 616 | |
| 617 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
| 618 | truncate_data_blocks_range(&dn, count); |
| 619 | free_from += count; |
| 620 | } |
| 621 | |
| 622 | f2fs_put_dnode(&dn); |
| 623 | free_next: |
| 624 | err = truncate_inode_blocks(inode, free_from); |
| 625 | out: |
| 626 | if (lock) |
| 627 | f2fs_unlock_op(sbi); |
Chao Yu | 8063cc7 | 2016-05-05 19:13:03 +0800 | [diff] [blame] | 628 | free_partial: |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 629 | /* lastly zero out the first data page */ |
| 630 | if (!err) |
| 631 | err = truncate_partial_data_page(inode, from, truncate_page); |
| 632 | |
| 633 | trace_f2fs_truncate_blocks_exit(inode, err); |
| 634 | return err; |
| 635 | } |
| 636 | |
| 637 | int f2fs_truncate(struct inode *inode, bool lock) |
| 638 | { |
| 639 | int err; |
| 640 | |
| 641 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
| 642 | S_ISLNK(inode->i_mode))) |
| 643 | return 0; |
| 644 | |
| 645 | trace_f2fs_truncate(inode); |
| 646 | |
| 647 | /* we should check inline_data size */ |
Jaegeuk Kim | a15a51b | 2015-12-22 11:09:35 -0800 | [diff] [blame] | 648 | if (!f2fs_may_inline_data(inode)) { |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 649 | err = f2fs_convert_inline_inode(inode); |
| 650 | if (err) |
| 651 | return err; |
| 652 | } |
| 653 | |
| 654 | err = truncate_blocks(inode, i_size_read(inode), lock); |
| 655 | if (err) |
| 656 | return err; |
| 657 | |
| 658 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 659 | mark_inode_dirty(inode); |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | int f2fs_getattr(struct vfsmount *mnt, |
| 664 | struct dentry *dentry, struct kstat *stat) |
| 665 | { |
| 666 | struct inode *inode = dentry->d_inode; |
| 667 | generic_fillattr(inode, stat); |
| 668 | stat->blocks <<= 3; |
| 669 | return 0; |
| 670 | } |
| 671 | |
| 672 | #ifdef CONFIG_F2FS_FS_POSIX_ACL |
| 673 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) |
| 674 | { |
| 675 | struct f2fs_inode_info *fi = F2FS_I(inode); |
| 676 | unsigned int ia_valid = attr->ia_valid; |
| 677 | |
| 678 | if (ia_valid & ATTR_UID) |
| 679 | inode->i_uid = attr->ia_uid; |
| 680 | if (ia_valid & ATTR_GID) |
| 681 | inode->i_gid = attr->ia_gid; |
| 682 | if (ia_valid & ATTR_ATIME) |
| 683 | inode->i_atime = timespec_trunc(attr->ia_atime, |
| 684 | inode->i_sb->s_time_gran); |
| 685 | if (ia_valid & ATTR_MTIME) |
| 686 | inode->i_mtime = timespec_trunc(attr->ia_mtime, |
| 687 | inode->i_sb->s_time_gran); |
| 688 | if (ia_valid & ATTR_CTIME) |
| 689 | inode->i_ctime = timespec_trunc(attr->ia_ctime, |
| 690 | inode->i_sb->s_time_gran); |
| 691 | if (ia_valid & ATTR_MODE) { |
| 692 | umode_t mode = attr->ia_mode; |
| 693 | |
| 694 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) |
| 695 | mode &= ~S_ISGID; |
| 696 | set_acl_inode(fi, mode); |
| 697 | } |
| 698 | } |
| 699 | #else |
| 700 | #define __setattr_copy setattr_copy |
| 701 | #endif |
| 702 | |
| 703 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) |
| 704 | { |
| 705 | struct inode *inode = dentry->d_inode; |
| 706 | struct f2fs_inode_info *fi = F2FS_I(inode); |
| 707 | int err; |
| 708 | |
| 709 | err = inode_change_ok(inode, attr); |
| 710 | if (err) |
| 711 | return err; |
| 712 | |
| 713 | if (attr->ia_valid & ATTR_SIZE) { |
| 714 | if (f2fs_encrypted_inode(inode) && |
Jaegeuk Kim | 86e0d58 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 715 | fscrypt_get_encryption_info(inode)) |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 716 | return -EACCES; |
| 717 | |
| 718 | if (attr->ia_size <= i_size_read(inode)) { |
| 719 | truncate_setsize(inode, attr->ia_size); |
| 720 | err = f2fs_truncate(inode, true); |
| 721 | if (err) |
| 722 | return err; |
Jaegeuk Kim | ab40597 | 2016-01-07 14:15:04 -0800 | [diff] [blame] | 723 | f2fs_balance_fs(F2FS_I_SB(inode), true); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 724 | } else { |
| 725 | /* |
| 726 | * do not trim all blocks after i_size if target size is |
| 727 | * larger than i_size. |
| 728 | */ |
| 729 | truncate_setsize(inode, attr->ia_size); |
Chao Yu | 5a2ab6e | 2015-12-01 11:36:16 +0800 | [diff] [blame] | 730 | |
| 731 | /* should convert inline inode here */ |
Jaegeuk Kim | a15a51b | 2015-12-22 11:09:35 -0800 | [diff] [blame] | 732 | if (!f2fs_may_inline_data(inode)) { |
Chao Yu | 5a2ab6e | 2015-12-01 11:36:16 +0800 | [diff] [blame] | 733 | err = f2fs_convert_inline_inode(inode); |
| 734 | if (err) |
| 735 | return err; |
| 736 | } |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 737 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | __setattr_copy(inode, attr); |
| 742 | |
| 743 | if (attr->ia_valid & ATTR_MODE) { |
| 744 | err = f2fs_acl_chmod(inode); |
| 745 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { |
| 746 | inode->i_mode = fi->i_acl_mode; |
| 747 | clear_inode_flag(fi, FI_ACL_MODE); |
| 748 | } |
| 749 | } |
| 750 | |
| 751 | mark_inode_dirty(inode); |
| 752 | return err; |
| 753 | } |
| 754 | |
| 755 | const struct inode_operations f2fs_file_inode_operations = { |
| 756 | .getattr = f2fs_getattr, |
| 757 | .setattr = f2fs_setattr, |
| 758 | .get_acl = f2fs_get_acl, |
| 759 | #ifdef CONFIG_F2FS_FS_XATTR |
| 760 | .setxattr = generic_setxattr, |
| 761 | .getxattr = generic_getxattr, |
| 762 | .listxattr = f2fs_listxattr, |
| 763 | .removexattr = generic_removexattr, |
| 764 | #endif |
| 765 | .fiemap = f2fs_fiemap, |
| 766 | }; |
| 767 | |
| 768 | static int fill_zero(struct inode *inode, pgoff_t index, |
| 769 | loff_t start, loff_t len) |
| 770 | { |
| 771 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 772 | struct page *page; |
| 773 | |
| 774 | if (!len) |
| 775 | return 0; |
| 776 | |
Jaegeuk Kim | ab40597 | 2016-01-07 14:15:04 -0800 | [diff] [blame] | 777 | f2fs_balance_fs(sbi, true); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 778 | |
| 779 | f2fs_lock_op(sbi); |
| 780 | page = get_new_data_page(inode, NULL, index, false); |
| 781 | f2fs_unlock_op(sbi); |
| 782 | |
| 783 | if (IS_ERR(page)) |
| 784 | return PTR_ERR(page); |
| 785 | |
Jaegeuk Kim | 3e0b2f4 | 2016-01-20 23:43:51 +0800 | [diff] [blame] | 786 | f2fs_wait_on_page_writeback(page, DATA, true); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 787 | zero_user(page, start, len); |
| 788 | set_page_dirty(page); |
| 789 | f2fs_put_page(page, 1); |
| 790 | return 0; |
| 791 | } |
| 792 | |
| 793 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) |
| 794 | { |
| 795 | int err; |
| 796 | |
| 797 | while (pg_start < pg_end) { |
| 798 | struct dnode_of_data dn; |
| 799 | pgoff_t end_offset, count; |
| 800 | |
| 801 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 802 | err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE); |
| 803 | if (err) { |
| 804 | if (err == -ENOENT) { |
| 805 | pg_start++; |
| 806 | continue; |
| 807 | } |
| 808 | return err; |
| 809 | } |
| 810 | |
Chao Yu | 9ff6fa2 | 2016-01-26 15:39:35 +0800 | [diff] [blame] | 811 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 812 | count = min(end_offset - dn.ofs_in_node, pg_end - pg_start); |
| 813 | |
| 814 | f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset); |
| 815 | |
| 816 | truncate_data_blocks_range(&dn, count); |
| 817 | f2fs_put_dnode(&dn); |
| 818 | |
| 819 | pg_start += count; |
| 820 | } |
| 821 | return 0; |
| 822 | } |
| 823 | |
| 824 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
| 825 | { |
| 826 | pgoff_t pg_start, pg_end; |
| 827 | loff_t off_start, off_end; |
Jaegeuk Kim | a15a51b | 2015-12-22 11:09:35 -0800 | [diff] [blame] | 828 | int ret; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 829 | |
Jaegeuk Kim | a15a51b | 2015-12-22 11:09:35 -0800 | [diff] [blame] | 830 | ret = f2fs_convert_inline_inode(inode); |
| 831 | if (ret) |
| 832 | return ret; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 833 | |
| 834 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
| 835 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; |
| 836 | |
| 837 | off_start = offset & (PAGE_CACHE_SIZE - 1); |
| 838 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); |
| 839 | |
| 840 | if (pg_start == pg_end) { |
| 841 | ret = fill_zero(inode, pg_start, off_start, |
| 842 | off_end - off_start); |
| 843 | if (ret) |
| 844 | return ret; |
| 845 | } else { |
| 846 | if (off_start) { |
| 847 | ret = fill_zero(inode, pg_start++, off_start, |
| 848 | PAGE_CACHE_SIZE - off_start); |
| 849 | if (ret) |
| 850 | return ret; |
| 851 | } |
| 852 | if (off_end) { |
| 853 | ret = fill_zero(inode, pg_end, 0, off_end); |
| 854 | if (ret) |
| 855 | return ret; |
| 856 | } |
| 857 | |
| 858 | if (pg_start < pg_end) { |
| 859 | struct address_space *mapping = inode->i_mapping; |
| 860 | loff_t blk_start, blk_end; |
| 861 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 862 | |
Jaegeuk Kim | ab40597 | 2016-01-07 14:15:04 -0800 | [diff] [blame] | 863 | f2fs_balance_fs(sbi, true); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 864 | |
| 865 | blk_start = (loff_t)pg_start << PAGE_CACHE_SHIFT; |
| 866 | blk_end = (loff_t)pg_end << PAGE_CACHE_SHIFT; |
| 867 | truncate_inode_pages_range(mapping, blk_start, |
| 868 | blk_end - 1); |
| 869 | |
| 870 | f2fs_lock_op(sbi); |
| 871 | ret = truncate_hole(inode, pg_start, pg_end); |
| 872 | f2fs_unlock_op(sbi); |
| 873 | } |
| 874 | } |
| 875 | |
| 876 | return ret; |
| 877 | } |
| 878 | |
| 879 | static int __exchange_data_block(struct inode *inode, pgoff_t src, |
| 880 | pgoff_t dst, bool full) |
| 881 | { |
| 882 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 883 | struct dnode_of_data dn; |
| 884 | block_t new_addr; |
| 885 | bool do_replace = false; |
| 886 | int ret; |
| 887 | |
| 888 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 889 | ret = get_dnode_of_data(&dn, src, LOOKUP_NODE_RA); |
| 890 | if (ret && ret != -ENOENT) { |
| 891 | return ret; |
| 892 | } else if (ret == -ENOENT) { |
| 893 | new_addr = NULL_ADDR; |
| 894 | } else { |
| 895 | new_addr = dn.data_blkaddr; |
| 896 | if (!is_checkpointed_data(sbi, new_addr)) { |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 897 | /* do not invalidate this block address */ |
Chao Yu | 4f686ae | 2016-02-24 17:16:47 +0800 | [diff] [blame] | 898 | f2fs_update_data_blkaddr(&dn, NULL_ADDR); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 899 | do_replace = true; |
| 900 | } |
| 901 | f2fs_put_dnode(&dn); |
| 902 | } |
| 903 | |
| 904 | if (new_addr == NULL_ADDR) |
| 905 | return full ? truncate_hole(inode, dst, dst + 1) : 0; |
| 906 | |
| 907 | if (do_replace) { |
| 908 | struct page *ipage = get_node_page(sbi, inode->i_ino); |
| 909 | struct node_info ni; |
| 910 | |
| 911 | if (IS_ERR(ipage)) { |
| 912 | ret = PTR_ERR(ipage); |
| 913 | goto err_out; |
| 914 | } |
| 915 | |
| 916 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
| 917 | ret = f2fs_reserve_block(&dn, dst); |
| 918 | if (ret) |
| 919 | goto err_out; |
| 920 | |
| 921 | truncate_data_blocks_range(&dn, 1); |
| 922 | |
| 923 | get_node_info(sbi, dn.nid, &ni); |
| 924 | f2fs_replace_block(sbi, &dn, dn.data_blkaddr, new_addr, |
Chao Yu | 7cc3c20 | 2016-02-06 14:40:34 +0800 | [diff] [blame] | 925 | ni.version, true, false); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 926 | f2fs_put_dnode(&dn); |
| 927 | } else { |
| 928 | struct page *psrc, *pdst; |
| 929 | |
| 930 | psrc = get_lock_data_page(inode, src, true); |
| 931 | if (IS_ERR(psrc)) |
| 932 | return PTR_ERR(psrc); |
Jaegeuk Kim | 1e653ef | 2016-02-08 14:17:38 -0800 | [diff] [blame] | 933 | pdst = get_new_data_page(inode, NULL, dst, true); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 934 | if (IS_ERR(pdst)) { |
| 935 | f2fs_put_page(psrc, 1); |
| 936 | return PTR_ERR(pdst); |
| 937 | } |
| 938 | f2fs_copy_page(psrc, pdst); |
| 939 | set_page_dirty(pdst); |
| 940 | f2fs_put_page(pdst, 1); |
| 941 | f2fs_put_page(psrc, 1); |
| 942 | |
| 943 | return truncate_hole(inode, src, src + 1); |
| 944 | } |
| 945 | return 0; |
| 946 | |
| 947 | err_out: |
| 948 | if (!get_dnode_of_data(&dn, src, LOOKUP_NODE)) { |
Chao Yu | 4f686ae | 2016-02-24 17:16:47 +0800 | [diff] [blame] | 949 | f2fs_update_data_blkaddr(&dn, new_addr); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 950 | f2fs_put_dnode(&dn); |
| 951 | } |
| 952 | return ret; |
| 953 | } |
| 954 | |
| 955 | static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end) |
| 956 | { |
| 957 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 958 | pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; |
| 959 | int ret = 0; |
| 960 | |
| 961 | for (; end < nrpages; start++, end++) { |
Jaegeuk Kim | ab40597 | 2016-01-07 14:15:04 -0800 | [diff] [blame] | 962 | f2fs_balance_fs(sbi, true); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 963 | f2fs_lock_op(sbi); |
| 964 | ret = __exchange_data_block(inode, end, start, true); |
| 965 | f2fs_unlock_op(sbi); |
| 966 | if (ret) |
| 967 | break; |
| 968 | } |
| 969 | return ret; |
| 970 | } |
| 971 | |
| 972 | static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len) |
| 973 | { |
| 974 | pgoff_t pg_start, pg_end; |
| 975 | loff_t new_size; |
| 976 | int ret; |
| 977 | |
| 978 | if (offset + len >= i_size_read(inode)) |
| 979 | return -EINVAL; |
| 980 | |
| 981 | /* collapse range should be aligned to block size of f2fs. */ |
| 982 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) |
| 983 | return -EINVAL; |
| 984 | |
Jaegeuk Kim | a15a51b | 2015-12-22 11:09:35 -0800 | [diff] [blame] | 985 | ret = f2fs_convert_inline_inode(inode); |
| 986 | if (ret) |
| 987 | return ret; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 988 | |
| 989 | pg_start = offset >> PAGE_CACHE_SHIFT; |
| 990 | pg_end = (offset + len) >> PAGE_CACHE_SHIFT; |
| 991 | |
| 992 | /* write out all dirty pages from offset */ |
| 993 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| 994 | if (ret) |
| 995 | return ret; |
| 996 | |
| 997 | truncate_pagecache(inode, 0, offset); |
| 998 | |
| 999 | ret = f2fs_do_collapse(inode, pg_start, pg_end); |
| 1000 | if (ret) |
| 1001 | return ret; |
| 1002 | |
| 1003 | /* write out all moved pages, if possible */ |
| 1004 | filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| 1005 | truncate_pagecache(inode, 0, offset); |
| 1006 | |
| 1007 | new_size = i_size_read(inode) - len; |
| 1008 | truncate_pagecache(inode, 0, new_size); |
| 1009 | |
| 1010 | ret = truncate_blocks(inode, new_size, true); |
| 1011 | if (!ret) |
| 1012 | i_size_write(inode, new_size); |
| 1013 | |
| 1014 | return ret; |
| 1015 | } |
| 1016 | |
| 1017 | static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, |
| 1018 | int mode) |
| 1019 | { |
| 1020 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1021 | struct address_space *mapping = inode->i_mapping; |
| 1022 | pgoff_t index, pg_start, pg_end; |
| 1023 | loff_t new_size = i_size_read(inode); |
| 1024 | loff_t off_start, off_end; |
| 1025 | int ret = 0; |
| 1026 | |
| 1027 | ret = inode_newsize_ok(inode, (len + offset)); |
| 1028 | if (ret) |
| 1029 | return ret; |
| 1030 | |
Jaegeuk Kim | a15a51b | 2015-12-22 11:09:35 -0800 | [diff] [blame] | 1031 | ret = f2fs_convert_inline_inode(inode); |
| 1032 | if (ret) |
| 1033 | return ret; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1034 | |
| 1035 | ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1); |
| 1036 | if (ret) |
| 1037 | return ret; |
| 1038 | |
| 1039 | truncate_pagecache_range(inode, offset, offset + len - 1); |
| 1040 | |
| 1041 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; |
| 1042 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; |
| 1043 | |
| 1044 | off_start = offset & (PAGE_CACHE_SIZE - 1); |
| 1045 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); |
| 1046 | |
| 1047 | if (pg_start == pg_end) { |
| 1048 | ret = fill_zero(inode, pg_start, off_start, |
| 1049 | off_end - off_start); |
| 1050 | if (ret) |
| 1051 | return ret; |
| 1052 | |
| 1053 | if (offset + len > new_size) |
| 1054 | new_size = offset + len; |
| 1055 | new_size = max_t(loff_t, new_size, offset + len); |
| 1056 | } else { |
| 1057 | if (off_start) { |
| 1058 | ret = fill_zero(inode, pg_start++, off_start, |
| 1059 | PAGE_CACHE_SIZE - off_start); |
| 1060 | if (ret) |
| 1061 | return ret; |
| 1062 | |
| 1063 | new_size = max_t(loff_t, new_size, |
| 1064 | (loff_t)pg_start << PAGE_CACHE_SHIFT); |
| 1065 | } |
| 1066 | |
| 1067 | for (index = pg_start; index < pg_end; index++) { |
| 1068 | struct dnode_of_data dn; |
| 1069 | struct page *ipage; |
| 1070 | |
| 1071 | f2fs_lock_op(sbi); |
| 1072 | |
| 1073 | ipage = get_node_page(sbi, inode->i_ino); |
| 1074 | if (IS_ERR(ipage)) { |
| 1075 | ret = PTR_ERR(ipage); |
| 1076 | f2fs_unlock_op(sbi); |
| 1077 | goto out; |
| 1078 | } |
| 1079 | |
| 1080 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
| 1081 | ret = f2fs_reserve_block(&dn, index); |
| 1082 | if (ret) { |
| 1083 | f2fs_unlock_op(sbi); |
| 1084 | goto out; |
| 1085 | } |
| 1086 | |
| 1087 | if (dn.data_blkaddr != NEW_ADDR) { |
| 1088 | invalidate_blocks(sbi, dn.data_blkaddr); |
Chao Yu | 4f686ae | 2016-02-24 17:16:47 +0800 | [diff] [blame] | 1089 | f2fs_update_data_blkaddr(&dn, NEW_ADDR); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1090 | } |
| 1091 | f2fs_put_dnode(&dn); |
| 1092 | f2fs_unlock_op(sbi); |
| 1093 | |
| 1094 | new_size = max_t(loff_t, new_size, |
| 1095 | (loff_t)(index + 1) << PAGE_CACHE_SHIFT); |
| 1096 | } |
| 1097 | |
| 1098 | if (off_end) { |
| 1099 | ret = fill_zero(inode, pg_end, 0, off_end); |
| 1100 | if (ret) |
| 1101 | goto out; |
| 1102 | |
| 1103 | new_size = max_t(loff_t, new_size, offset + len); |
| 1104 | } |
| 1105 | } |
| 1106 | |
| 1107 | out: |
| 1108 | if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) { |
| 1109 | i_size_write(inode, new_size); |
| 1110 | mark_inode_dirty(inode); |
| 1111 | update_inode_page(inode); |
| 1112 | } |
| 1113 | |
| 1114 | return ret; |
| 1115 | } |
| 1116 | |
| 1117 | static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) |
| 1118 | { |
| 1119 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1120 | pgoff_t pg_start, pg_end, delta, nrpages, idx; |
| 1121 | loff_t new_size; |
| 1122 | int ret = 0; |
| 1123 | |
| 1124 | new_size = i_size_read(inode) + len; |
| 1125 | if (new_size > inode->i_sb->s_maxbytes) |
| 1126 | return -EFBIG; |
| 1127 | |
| 1128 | if (offset >= i_size_read(inode)) |
| 1129 | return -EINVAL; |
| 1130 | |
| 1131 | /* insert range should be aligned to block size of f2fs. */ |
| 1132 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) |
| 1133 | return -EINVAL; |
| 1134 | |
Jaegeuk Kim | a15a51b | 2015-12-22 11:09:35 -0800 | [diff] [blame] | 1135 | ret = f2fs_convert_inline_inode(inode); |
| 1136 | if (ret) |
| 1137 | return ret; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1138 | |
Jaegeuk Kim | ab40597 | 2016-01-07 14:15:04 -0800 | [diff] [blame] | 1139 | f2fs_balance_fs(sbi, true); |
Jaegeuk Kim | 9755a87 | 2015-12-22 13:23:35 -0800 | [diff] [blame] | 1140 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1141 | ret = truncate_blocks(inode, i_size_read(inode), true); |
| 1142 | if (ret) |
| 1143 | return ret; |
| 1144 | |
| 1145 | /* write out all dirty pages from offset */ |
| 1146 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| 1147 | if (ret) |
| 1148 | return ret; |
| 1149 | |
| 1150 | truncate_pagecache(inode, 0, offset); |
| 1151 | |
| 1152 | pg_start = offset >> PAGE_CACHE_SHIFT; |
| 1153 | pg_end = (offset + len) >> PAGE_CACHE_SHIFT; |
| 1154 | delta = pg_end - pg_start; |
| 1155 | nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; |
| 1156 | |
| 1157 | for (idx = nrpages - 1; idx >= pg_start && idx != -1; idx--) { |
| 1158 | f2fs_lock_op(sbi); |
| 1159 | ret = __exchange_data_block(inode, idx, idx + delta, false); |
| 1160 | f2fs_unlock_op(sbi); |
| 1161 | if (ret) |
| 1162 | break; |
| 1163 | } |
| 1164 | |
| 1165 | /* write out all moved pages, if possible */ |
| 1166 | filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| 1167 | truncate_pagecache(inode, 0, offset); |
| 1168 | |
| 1169 | if (!ret) |
| 1170 | i_size_write(inode, new_size); |
| 1171 | return ret; |
| 1172 | } |
| 1173 | |
| 1174 | static int expand_inode_data(struct inode *inode, loff_t offset, |
| 1175 | loff_t len, int mode) |
| 1176 | { |
| 1177 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
Jaegeuk Kim | a6c63ba | 2016-05-06 15:30:38 -0700 | [diff] [blame] | 1178 | struct f2fs_map_blocks map = { .m_next_pgofs = NULL }; |
| 1179 | pgoff_t pg_end; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1180 | loff_t new_size = i_size_read(inode); |
Jaegeuk Kim | a6c63ba | 2016-05-06 15:30:38 -0700 | [diff] [blame] | 1181 | loff_t off_end; |
| 1182 | int ret; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1183 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1184 | ret = inode_newsize_ok(inode, (len + offset)); |
| 1185 | if (ret) |
| 1186 | return ret; |
| 1187 | |
Jaegeuk Kim | a15a51b | 2015-12-22 11:09:35 -0800 | [diff] [blame] | 1188 | ret = f2fs_convert_inline_inode(inode); |
| 1189 | if (ret) |
| 1190 | return ret; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1191 | |
Jaegeuk Kim | ab40597 | 2016-01-07 14:15:04 -0800 | [diff] [blame] | 1192 | f2fs_balance_fs(sbi, true); |
Jaegeuk Kim | 9755a87 | 2015-12-22 13:23:35 -0800 | [diff] [blame] | 1193 | |
Jaegeuk Kim | a6c63ba | 2016-05-06 15:30:38 -0700 | [diff] [blame] | 1194 | pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT; |
| 1195 | off_end = (offset + len) & (PAGE_SIZE - 1); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1196 | |
Jaegeuk Kim | a6c63ba | 2016-05-06 15:30:38 -0700 | [diff] [blame] | 1197 | map.m_lblk = ((unsigned long long)offset) >> PAGE_SHIFT; |
| 1198 | map.m_len = pg_end - map.m_lblk; |
| 1199 | if (off_end) |
| 1200 | map.m_len++; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1201 | |
Jaegeuk Kim | a6c63ba | 2016-05-06 15:30:38 -0700 | [diff] [blame] | 1202 | ret = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); |
| 1203 | if (ret) { |
| 1204 | pgoff_t last_off; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1205 | |
Jaegeuk Kim | a6c63ba | 2016-05-06 15:30:38 -0700 | [diff] [blame] | 1206 | if (!map.m_len) |
| 1207 | return ret; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1208 | |
Jaegeuk Kim | a6c63ba | 2016-05-06 15:30:38 -0700 | [diff] [blame] | 1209 | last_off = map.m_lblk + map.m_len - 1; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1210 | |
Jaegeuk Kim | a6c63ba | 2016-05-06 15:30:38 -0700 | [diff] [blame] | 1211 | /* update new size to the failed position */ |
| 1212 | new_size = (last_off == pg_end) ? offset + len: |
| 1213 | (loff_t)(last_off + 1) << PAGE_SHIFT; |
| 1214 | } else { |
| 1215 | new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1216 | } |
| 1217 | |
Jaegeuk Kim | a6c63ba | 2016-05-06 15:30:38 -0700 | [diff] [blame] | 1218 | if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) { |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1219 | i_size_write(inode, new_size); |
| 1220 | mark_inode_dirty(inode); |
| 1221 | update_inode_page(inode); |
| 1222 | } |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1223 | |
| 1224 | return ret; |
| 1225 | } |
| 1226 | |
Jaegeuk Kim | 3fa793b | 2016-03-28 11:33:05 -0700 | [diff] [blame] | 1227 | #ifndef FALLOC_FL_COLLAPSE_RANGE |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1228 | #define FALLOC_FL_COLLAPSE_RANGE 0X08 |
Jaegeuk Kim | 3fa793b | 2016-03-28 11:33:05 -0700 | [diff] [blame] | 1229 | #endif |
| 1230 | #ifndef FALLOC_FL_ZERO_RANGE |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1231 | #define FALLOC_FL_ZERO_RANGE 0X10 |
Jaegeuk Kim | 3fa793b | 2016-03-28 11:33:05 -0700 | [diff] [blame] | 1232 | #endif |
| 1233 | #ifndef FALLOC_FL_INSERT_RANGE |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1234 | #define FALLOC_FL_INSERT_RANGE 0X20 |
Jaegeuk Kim | 3fa793b | 2016-03-28 11:33:05 -0700 | [diff] [blame] | 1235 | #endif |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1236 | |
| 1237 | static long f2fs_fallocate(struct file *file, int mode, |
| 1238 | loff_t offset, loff_t len) |
| 1239 | { |
| 1240 | struct inode *inode = file_inode(file); |
| 1241 | long ret = 0; |
| 1242 | |
| 1243 | /* f2fs only support ->fallocate for regular file */ |
| 1244 | if (!S_ISREG(inode->i_mode)) |
| 1245 | return -EINVAL; |
| 1246 | |
| 1247 | if (f2fs_encrypted_inode(inode) && |
| 1248 | (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE))) |
| 1249 | return -EOPNOTSUPP; |
| 1250 | |
| 1251 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | |
| 1252 | FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | |
| 1253 | FALLOC_FL_INSERT_RANGE)) |
| 1254 | return -EOPNOTSUPP; |
| 1255 | |
| 1256 | mutex_lock(&inode->i_mutex); |
| 1257 | |
| 1258 | if (mode & FALLOC_FL_PUNCH_HOLE) { |
| 1259 | if (offset >= inode->i_size) |
| 1260 | goto out; |
| 1261 | |
| 1262 | ret = punch_hole(inode, offset, len); |
| 1263 | } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
| 1264 | ret = f2fs_collapse_range(inode, offset, len); |
| 1265 | } else if (mode & FALLOC_FL_ZERO_RANGE) { |
| 1266 | ret = f2fs_zero_range(inode, offset, len, mode); |
| 1267 | } else if (mode & FALLOC_FL_INSERT_RANGE) { |
| 1268 | ret = f2fs_insert_range(inode, offset, len); |
| 1269 | } else { |
| 1270 | ret = expand_inode_data(inode, offset, len, mode); |
| 1271 | } |
| 1272 | |
| 1273 | if (!ret) { |
| 1274 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 1275 | mark_inode_dirty(inode); |
Jaegeuk Kim | 2c88a92 | 2016-01-08 16:57:48 -0800 | [diff] [blame] | 1276 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1277 | } |
| 1278 | |
| 1279 | out: |
| 1280 | mutex_unlock(&inode->i_mutex); |
| 1281 | |
| 1282 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
| 1283 | return ret; |
| 1284 | } |
| 1285 | |
| 1286 | static int f2fs_release_file(struct inode *inode, struct file *filp) |
| 1287 | { |
Jaegeuk Kim | 5728946 | 2016-04-11 11:51:51 -0700 | [diff] [blame] | 1288 | /* |
| 1289 | * f2fs_relase_file is called at every close calls. So we should |
| 1290 | * not drop any inmemory pages by close called by other process. |
| 1291 | */ |
| 1292 | if (!(filp->f_mode & FMODE_WRITE) || |
| 1293 | atomic_read(&inode->i_writecount) != 1) |
| 1294 | return 0; |
| 1295 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1296 | /* some remained atomic pages should discarded */ |
| 1297 | if (f2fs_is_atomic_file(inode)) |
Chao Yu | b99c743 | 2016-02-06 14:38:29 +0800 | [diff] [blame] | 1298 | drop_inmem_pages(inode); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1299 | if (f2fs_is_volatile_file(inode)) { |
Jaegeuk Kim | 7f8ac3f | 2016-04-11 13:15:10 -0700 | [diff] [blame] | 1300 | clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1301 | set_inode_flag(F2FS_I(inode), FI_DROP_CACHE); |
| 1302 | filemap_fdatawrite(inode->i_mapping); |
| 1303 | clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE); |
| 1304 | } |
| 1305 | return 0; |
| 1306 | } |
| 1307 | |
| 1308 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) |
| 1309 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) |
| 1310 | |
| 1311 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) |
| 1312 | { |
| 1313 | if (S_ISDIR(mode)) |
| 1314 | return flags; |
| 1315 | else if (S_ISREG(mode)) |
| 1316 | return flags & F2FS_REG_FLMASK; |
| 1317 | else |
| 1318 | return flags & F2FS_OTHER_FLMASK; |
| 1319 | } |
| 1320 | |
| 1321 | static int f2fs_ioc_getflags(struct file *filp, unsigned long arg) |
| 1322 | { |
| 1323 | struct inode *inode = file_inode(filp); |
| 1324 | struct f2fs_inode_info *fi = F2FS_I(inode); |
| 1325 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; |
| 1326 | return put_user(flags, (int __user *)arg); |
| 1327 | } |
| 1328 | |
| 1329 | static int f2fs_ioc_setflags(struct file *filp, unsigned long arg) |
| 1330 | { |
| 1331 | struct inode *inode = file_inode(filp); |
| 1332 | struct f2fs_inode_info *fi = F2FS_I(inode); |
| 1333 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; |
| 1334 | unsigned int oldflags; |
| 1335 | int ret; |
| 1336 | |
| 1337 | ret = mnt_want_write_file(filp); |
| 1338 | if (ret) |
| 1339 | return ret; |
| 1340 | |
| 1341 | if (!inode_owner_or_capable(inode)) { |
| 1342 | ret = -EACCES; |
| 1343 | goto out; |
| 1344 | } |
| 1345 | |
| 1346 | if (get_user(flags, (int __user *)arg)) { |
| 1347 | ret = -EFAULT; |
| 1348 | goto out; |
| 1349 | } |
| 1350 | |
| 1351 | flags = f2fs_mask_flags(inode->i_mode, flags); |
| 1352 | |
| 1353 | mutex_lock(&inode->i_mutex); |
| 1354 | |
| 1355 | oldflags = fi->i_flags; |
| 1356 | |
| 1357 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { |
| 1358 | if (!capable(CAP_LINUX_IMMUTABLE)) { |
| 1359 | mutex_unlock(&inode->i_mutex); |
| 1360 | ret = -EPERM; |
| 1361 | goto out; |
| 1362 | } |
| 1363 | } |
| 1364 | |
| 1365 | flags = flags & FS_FL_USER_MODIFIABLE; |
| 1366 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; |
| 1367 | fi->i_flags = flags; |
| 1368 | mutex_unlock(&inode->i_mutex); |
| 1369 | |
| 1370 | f2fs_set_inode_flags(inode); |
| 1371 | inode->i_ctime = CURRENT_TIME; |
| 1372 | mark_inode_dirty(inode); |
| 1373 | out: |
| 1374 | mnt_drop_write_file(filp); |
| 1375 | return ret; |
| 1376 | } |
| 1377 | |
| 1378 | static int f2fs_ioc_getversion(struct file *filp, unsigned long arg) |
| 1379 | { |
| 1380 | struct inode *inode = file_inode(filp); |
| 1381 | |
| 1382 | return put_user(inode->i_generation, (int __user *)arg); |
| 1383 | } |
| 1384 | |
| 1385 | static int f2fs_ioc_start_atomic_write(struct file *filp) |
| 1386 | { |
| 1387 | struct inode *inode = file_inode(filp); |
| 1388 | int ret; |
| 1389 | |
| 1390 | if (!inode_owner_or_capable(inode)) |
| 1391 | return -EACCES; |
| 1392 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1393 | if (f2fs_is_atomic_file(inode)) |
| 1394 | return 0; |
| 1395 | |
| 1396 | ret = f2fs_convert_inline_inode(inode); |
| 1397 | if (ret) |
| 1398 | return ret; |
| 1399 | |
| 1400 | set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
Jaegeuk Kim | 2c88a92 | 2016-01-08 16:57:48 -0800 | [diff] [blame] | 1401 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1402 | |
Jaegeuk Kim | a9a7277 | 2016-04-12 14:36:11 -0700 | [diff] [blame] | 1403 | if (!get_dirty_pages(inode)) |
| 1404 | return 0; |
| 1405 | |
| 1406 | f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING, |
| 1407 | "Unexpected flush for atomic writes: ino=%lu, npages=%u", |
| 1408 | inode->i_ino, get_dirty_pages(inode)); |
| 1409 | ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); |
| 1410 | if (ret) |
| 1411 | clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
| 1412 | return ret; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1413 | } |
| 1414 | |
| 1415 | static int f2fs_ioc_commit_atomic_write(struct file *filp) |
| 1416 | { |
| 1417 | struct inode *inode = file_inode(filp); |
| 1418 | int ret; |
| 1419 | |
| 1420 | if (!inode_owner_or_capable(inode)) |
| 1421 | return -EACCES; |
| 1422 | |
| 1423 | if (f2fs_is_volatile_file(inode)) |
| 1424 | return 0; |
| 1425 | |
| 1426 | ret = mnt_want_write_file(filp); |
| 1427 | if (ret) |
| 1428 | return ret; |
| 1429 | |
| 1430 | if (f2fs_is_atomic_file(inode)) { |
| 1431 | clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
Chao Yu | b99c743 | 2016-02-06 14:38:29 +0800 | [diff] [blame] | 1432 | ret = commit_inmem_pages(inode); |
Jaegeuk Kim | 7823b57 | 2016-01-09 17:08:38 -0800 | [diff] [blame] | 1433 | if (ret) { |
| 1434 | set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1435 | goto err_out; |
Jaegeuk Kim | 7823b57 | 2016-01-09 17:08:38 -0800 | [diff] [blame] | 1436 | } |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1437 | } |
| 1438 | |
Jaegeuk Kim | a6b9f22 | 2016-04-15 09:43:17 -0700 | [diff] [blame] | 1439 | ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1440 | err_out: |
| 1441 | mnt_drop_write_file(filp); |
| 1442 | return ret; |
| 1443 | } |
| 1444 | |
| 1445 | static int f2fs_ioc_start_volatile_write(struct file *filp) |
| 1446 | { |
| 1447 | struct inode *inode = file_inode(filp); |
| 1448 | int ret; |
| 1449 | |
| 1450 | if (!inode_owner_or_capable(inode)) |
| 1451 | return -EACCES; |
| 1452 | |
| 1453 | if (f2fs_is_volatile_file(inode)) |
| 1454 | return 0; |
| 1455 | |
| 1456 | ret = f2fs_convert_inline_inode(inode); |
| 1457 | if (ret) |
| 1458 | return ret; |
| 1459 | |
| 1460 | set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); |
Jaegeuk Kim | 2c88a92 | 2016-01-08 16:57:48 -0800 | [diff] [blame] | 1461 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1462 | return 0; |
| 1463 | } |
| 1464 | |
| 1465 | static int f2fs_ioc_release_volatile_write(struct file *filp) |
| 1466 | { |
| 1467 | struct inode *inode = file_inode(filp); |
| 1468 | |
| 1469 | if (!inode_owner_or_capable(inode)) |
| 1470 | return -EACCES; |
| 1471 | |
| 1472 | if (!f2fs_is_volatile_file(inode)) |
| 1473 | return 0; |
| 1474 | |
| 1475 | if (!f2fs_is_first_block_written(inode)) |
| 1476 | return truncate_partial_data_page(inode, 0, true); |
| 1477 | |
| 1478 | return punch_hole(inode, 0, F2FS_BLKSIZE); |
| 1479 | } |
| 1480 | |
| 1481 | static int f2fs_ioc_abort_volatile_write(struct file *filp) |
| 1482 | { |
| 1483 | struct inode *inode = file_inode(filp); |
| 1484 | int ret; |
| 1485 | |
| 1486 | if (!inode_owner_or_capable(inode)) |
| 1487 | return -EACCES; |
| 1488 | |
| 1489 | ret = mnt_want_write_file(filp); |
| 1490 | if (ret) |
| 1491 | return ret; |
| 1492 | |
Jaegeuk Kim | 7f8ac3f | 2016-04-11 13:15:10 -0700 | [diff] [blame] | 1493 | if (f2fs_is_atomic_file(inode)) |
Chao Yu | b99c743 | 2016-02-06 14:38:29 +0800 | [diff] [blame] | 1494 | drop_inmem_pages(inode); |
Jaegeuk Kim | 2f8dbf9 | 2015-12-29 15:46:33 -0800 | [diff] [blame] | 1495 | if (f2fs_is_volatile_file(inode)) { |
| 1496 | clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE); |
Jaegeuk Kim | a6b9f22 | 2016-04-15 09:43:17 -0700 | [diff] [blame] | 1497 | ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true); |
Jaegeuk Kim | 2f8dbf9 | 2015-12-29 15:46:33 -0800 | [diff] [blame] | 1498 | } |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1499 | |
| 1500 | mnt_drop_write_file(filp); |
Jaegeuk Kim | 2c88a92 | 2016-01-08 16:57:48 -0800 | [diff] [blame] | 1501 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1502 | return ret; |
| 1503 | } |
| 1504 | |
| 1505 | static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg) |
| 1506 | { |
| 1507 | struct inode *inode = file_inode(filp); |
| 1508 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1509 | struct super_block *sb = sbi->sb; |
| 1510 | __u32 in; |
| 1511 | |
| 1512 | if (!capable(CAP_SYS_ADMIN)) |
| 1513 | return -EPERM; |
| 1514 | |
| 1515 | if (get_user(in, (__u32 __user *)arg)) |
| 1516 | return -EFAULT; |
| 1517 | |
| 1518 | switch (in) { |
| 1519 | case FS_GOING_DOWN_FULLSYNC: |
| 1520 | sb = freeze_bdev(sb->s_bdev); |
| 1521 | if (sb && !IS_ERR(sb)) { |
| 1522 | f2fs_stop_checkpoint(sbi); |
| 1523 | thaw_bdev(sb->s_bdev, sb); |
| 1524 | } |
| 1525 | break; |
| 1526 | case FS_GOING_DOWN_METASYNC: |
| 1527 | /* do checkpoint only */ |
| 1528 | f2fs_sync_fs(sb, 1); |
| 1529 | f2fs_stop_checkpoint(sbi); |
| 1530 | break; |
| 1531 | case FS_GOING_DOWN_NOSYNC: |
| 1532 | f2fs_stop_checkpoint(sbi); |
| 1533 | break; |
| 1534 | case FS_GOING_DOWN_METAFLUSH: |
| 1535 | sync_meta_pages(sbi, META, LONG_MAX); |
| 1536 | f2fs_stop_checkpoint(sbi); |
| 1537 | break; |
| 1538 | default: |
| 1539 | return -EINVAL; |
| 1540 | } |
Jaegeuk Kim | 2c88a92 | 2016-01-08 16:57:48 -0800 | [diff] [blame] | 1541 | f2fs_update_time(sbi, REQ_TIME); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1542 | return 0; |
| 1543 | } |
| 1544 | |
| 1545 | static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg) |
| 1546 | { |
| 1547 | struct inode *inode = file_inode(filp); |
| 1548 | struct super_block *sb = inode->i_sb; |
| 1549 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
| 1550 | struct fstrim_range range; |
| 1551 | int ret; |
| 1552 | |
| 1553 | if (!capable(CAP_SYS_ADMIN)) |
| 1554 | return -EPERM; |
| 1555 | |
| 1556 | if (!blk_queue_discard(q)) |
| 1557 | return -EOPNOTSUPP; |
| 1558 | |
| 1559 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
| 1560 | sizeof(range))) |
| 1561 | return -EFAULT; |
| 1562 | |
| 1563 | range.minlen = max((unsigned int)range.minlen, |
| 1564 | q->limits.discard_granularity); |
| 1565 | ret = f2fs_trim_fs(F2FS_SB(sb), &range); |
| 1566 | if (ret < 0) |
| 1567 | return ret; |
| 1568 | |
| 1569 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
| 1570 | sizeof(range))) |
| 1571 | return -EFAULT; |
Jaegeuk Kim | 2c88a92 | 2016-01-08 16:57:48 -0800 | [diff] [blame] | 1572 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1573 | return 0; |
| 1574 | } |
| 1575 | |
| 1576 | static bool uuid_is_nonzero(__u8 u[16]) |
| 1577 | { |
| 1578 | int i; |
| 1579 | |
| 1580 | for (i = 0; i < 16; i++) |
| 1581 | if (u[i]) |
| 1582 | return true; |
| 1583 | return false; |
| 1584 | } |
| 1585 | |
| 1586 | static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg) |
| 1587 | { |
Jaegeuk Kim | 86e0d58 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 1588 | struct fscrypt_policy policy; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1589 | struct inode *inode = file_inode(filp); |
| 1590 | |
Jaegeuk Kim | 86e0d58 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 1591 | if (copy_from_user(&policy, (struct fscrypt_policy __user *)arg, |
| 1592 | sizeof(policy))) |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1593 | return -EFAULT; |
| 1594 | |
Jaegeuk Kim | 2c88a92 | 2016-01-08 16:57:48 -0800 | [diff] [blame] | 1595 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
Jaegeuk Kim | 86e0d58 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 1596 | return fscrypt_process_policy(inode, &policy); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1597 | } |
| 1598 | |
| 1599 | static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg) |
| 1600 | { |
Jaegeuk Kim | 86e0d58 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 1601 | struct fscrypt_policy policy; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1602 | struct inode *inode = file_inode(filp); |
| 1603 | int err; |
| 1604 | |
Jaegeuk Kim | 86e0d58 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 1605 | err = fscrypt_get_policy(inode, &policy); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1606 | if (err) |
| 1607 | return err; |
| 1608 | |
Jaegeuk Kim | 86e0d58 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 1609 | if (copy_to_user((struct fscrypt_policy __user *)arg, &policy, sizeof(policy))) |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1610 | return -EFAULT; |
| 1611 | return 0; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1612 | } |
| 1613 | |
| 1614 | static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg) |
| 1615 | { |
| 1616 | struct inode *inode = file_inode(filp); |
| 1617 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1618 | int err; |
| 1619 | |
| 1620 | if (!f2fs_sb_has_crypto(inode->i_sb)) |
| 1621 | return -EOPNOTSUPP; |
| 1622 | |
| 1623 | if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt)) |
| 1624 | goto got_it; |
| 1625 | |
| 1626 | err = mnt_want_write_file(filp); |
| 1627 | if (err) |
| 1628 | return err; |
| 1629 | |
| 1630 | /* update superblock with uuid */ |
| 1631 | generate_random_uuid(sbi->raw_super->encrypt_pw_salt); |
| 1632 | |
| 1633 | err = f2fs_commit_super(sbi, false); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1634 | if (err) { |
| 1635 | /* undo new data */ |
| 1636 | memset(sbi->raw_super->encrypt_pw_salt, 0, 16); |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1637 | mnt_drop_write_file(filp); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1638 | return err; |
| 1639 | } |
Chao Yu | c9162be | 2015-12-15 17:19:26 +0800 | [diff] [blame] | 1640 | mnt_drop_write_file(filp); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1641 | got_it: |
| 1642 | if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt, |
| 1643 | 16)) |
| 1644 | return -EFAULT; |
| 1645 | return 0; |
| 1646 | } |
| 1647 | |
| 1648 | static int f2fs_ioc_gc(struct file *filp, unsigned long arg) |
| 1649 | { |
| 1650 | struct inode *inode = file_inode(filp); |
| 1651 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1652 | __u32 sync; |
| 1653 | |
| 1654 | if (!capable(CAP_SYS_ADMIN)) |
| 1655 | return -EPERM; |
| 1656 | |
| 1657 | if (get_user(sync, (__u32 __user *)arg)) |
| 1658 | return -EFAULT; |
| 1659 | |
| 1660 | if (f2fs_readonly(sbi->sb)) |
| 1661 | return -EROFS; |
| 1662 | |
| 1663 | if (!sync) { |
| 1664 | if (!mutex_trylock(&sbi->gc_mutex)) |
| 1665 | return -EBUSY; |
| 1666 | } else { |
| 1667 | mutex_lock(&sbi->gc_mutex); |
| 1668 | } |
| 1669 | |
| 1670 | return f2fs_gc(sbi, sync); |
| 1671 | } |
| 1672 | |
| 1673 | static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg) |
| 1674 | { |
| 1675 | struct inode *inode = file_inode(filp); |
| 1676 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1677 | |
| 1678 | if (!capable(CAP_SYS_ADMIN)) |
| 1679 | return -EPERM; |
| 1680 | |
| 1681 | if (f2fs_readonly(sbi->sb)) |
| 1682 | return -EROFS; |
| 1683 | |
Chao Yu | 7054654 | 2015-12-24 18:11:32 +0800 | [diff] [blame] | 1684 | return f2fs_sync_fs(sbi->sb, 1); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1685 | } |
| 1686 | |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1687 | static int f2fs_defragment_range(struct f2fs_sb_info *sbi, |
| 1688 | struct file *filp, |
| 1689 | struct f2fs_defragment *range) |
| 1690 | { |
| 1691 | struct inode *inode = file_inode(filp); |
Chao Yu | 6dac6f7 | 2016-01-26 15:42:58 +0800 | [diff] [blame] | 1692 | struct f2fs_map_blocks map = { .m_next_pgofs = NULL }; |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1693 | struct extent_info ei; |
| 1694 | pgoff_t pg_start, pg_end; |
Chao Yu | adf0420 | 2015-12-01 11:56:52 +0800 | [diff] [blame] | 1695 | unsigned int blk_per_seg = sbi->blocks_per_seg; |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1696 | unsigned int total = 0, sec_num; |
Chao Yu | adf0420 | 2015-12-01 11:56:52 +0800 | [diff] [blame] | 1697 | unsigned int pages_per_sec = sbi->segs_per_sec * blk_per_seg; |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1698 | block_t blk_end = 0; |
| 1699 | bool fragmented = false; |
| 1700 | int err; |
| 1701 | |
| 1702 | /* if in-place-update policy is enabled, don't waste time here */ |
| 1703 | if (need_inplace_update(inode)) |
| 1704 | return -EINVAL; |
| 1705 | |
| 1706 | pg_start = range->start >> PAGE_CACHE_SHIFT; |
| 1707 | pg_end = (range->start + range->len) >> PAGE_CACHE_SHIFT; |
| 1708 | |
Jaegeuk Kim | ab40597 | 2016-01-07 14:15:04 -0800 | [diff] [blame] | 1709 | f2fs_balance_fs(sbi, true); |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1710 | |
| 1711 | mutex_lock(&inode->i_mutex); |
| 1712 | |
| 1713 | /* writeback all dirty pages in the range */ |
| 1714 | err = filemap_write_and_wait_range(inode->i_mapping, range->start, |
Fan Li | b0391d1 | 2015-12-14 13:34:00 +0800 | [diff] [blame] | 1715 | range->start + range->len - 1); |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1716 | if (err) |
| 1717 | goto out; |
| 1718 | |
| 1719 | /* |
| 1720 | * lookup mapping info in extent cache, skip defragmenting if physical |
| 1721 | * block addresses are continuous. |
| 1722 | */ |
| 1723 | if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) { |
| 1724 | if (ei.fofs + ei.len >= pg_end) |
| 1725 | goto out; |
| 1726 | } |
| 1727 | |
| 1728 | map.m_lblk = pg_start; |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1729 | |
| 1730 | /* |
| 1731 | * lookup mapping info in dnode page cache, skip defragmenting if all |
| 1732 | * physical block addresses are continuous even if there are hole(s) |
| 1733 | * in logical blocks. |
| 1734 | */ |
| 1735 | while (map.m_lblk < pg_end) { |
Fan Li | 94cb933 | 2015-12-15 17:02:41 +0800 | [diff] [blame] | 1736 | map.m_len = pg_end - map.m_lblk; |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1737 | err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ); |
| 1738 | if (err) |
| 1739 | goto out; |
| 1740 | |
| 1741 | if (!(map.m_flags & F2FS_MAP_FLAGS)) { |
| 1742 | map.m_lblk++; |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1743 | continue; |
| 1744 | } |
| 1745 | |
| 1746 | if (blk_end && blk_end != map.m_pblk) { |
| 1747 | fragmented = true; |
| 1748 | break; |
| 1749 | } |
| 1750 | blk_end = map.m_pblk + map.m_len; |
| 1751 | |
| 1752 | map.m_lblk += map.m_len; |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1753 | } |
| 1754 | |
| 1755 | if (!fragmented) |
| 1756 | goto out; |
| 1757 | |
| 1758 | map.m_lblk = pg_start; |
| 1759 | map.m_len = pg_end - pg_start; |
| 1760 | |
| 1761 | sec_num = (map.m_len + pages_per_sec - 1) / pages_per_sec; |
| 1762 | |
| 1763 | /* |
| 1764 | * make sure there are enough free section for LFS allocation, this can |
| 1765 | * avoid defragment running in SSR mode when free section are allocated |
| 1766 | * intensively |
| 1767 | */ |
| 1768 | if (has_not_enough_free_secs(sbi, sec_num)) { |
| 1769 | err = -EAGAIN; |
| 1770 | goto out; |
| 1771 | } |
| 1772 | |
| 1773 | while (map.m_lblk < pg_end) { |
| 1774 | pgoff_t idx; |
| 1775 | int cnt = 0; |
| 1776 | |
| 1777 | do_map: |
Fan Li | 94cb933 | 2015-12-15 17:02:41 +0800 | [diff] [blame] | 1778 | map.m_len = pg_end - map.m_lblk; |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1779 | err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ); |
| 1780 | if (err) |
| 1781 | goto clear_out; |
| 1782 | |
| 1783 | if (!(map.m_flags & F2FS_MAP_FLAGS)) { |
| 1784 | map.m_lblk++; |
| 1785 | continue; |
| 1786 | } |
| 1787 | |
| 1788 | set_inode_flag(F2FS_I(inode), FI_DO_DEFRAG); |
| 1789 | |
| 1790 | idx = map.m_lblk; |
| 1791 | while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) { |
| 1792 | struct page *page; |
| 1793 | |
| 1794 | page = get_lock_data_page(inode, idx, true); |
| 1795 | if (IS_ERR(page)) { |
| 1796 | err = PTR_ERR(page); |
| 1797 | goto clear_out; |
| 1798 | } |
| 1799 | |
| 1800 | set_page_dirty(page); |
| 1801 | f2fs_put_page(page, 1); |
| 1802 | |
| 1803 | idx++; |
| 1804 | cnt++; |
| 1805 | total++; |
| 1806 | } |
| 1807 | |
| 1808 | map.m_lblk = idx; |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1809 | |
| 1810 | if (idx < pg_end && cnt < blk_per_seg) |
| 1811 | goto do_map; |
| 1812 | |
| 1813 | clear_inode_flag(F2FS_I(inode), FI_DO_DEFRAG); |
| 1814 | |
| 1815 | err = filemap_fdatawrite(inode->i_mapping); |
| 1816 | if (err) |
| 1817 | goto out; |
| 1818 | } |
| 1819 | clear_out: |
| 1820 | clear_inode_flag(F2FS_I(inode), FI_DO_DEFRAG); |
| 1821 | out: |
| 1822 | mutex_unlock(&inode->i_mutex); |
| 1823 | if (!err) |
| 1824 | range->len = (u64)total << PAGE_CACHE_SHIFT; |
| 1825 | return err; |
| 1826 | } |
| 1827 | |
| 1828 | static int f2fs_ioc_defragment(struct file *filp, unsigned long arg) |
| 1829 | { |
| 1830 | struct inode *inode = file_inode(filp); |
| 1831 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1832 | struct f2fs_defragment range; |
| 1833 | int err; |
| 1834 | |
| 1835 | if (!capable(CAP_SYS_ADMIN)) |
| 1836 | return -EPERM; |
| 1837 | |
| 1838 | if (!S_ISREG(inode->i_mode)) |
| 1839 | return -EINVAL; |
| 1840 | |
| 1841 | err = mnt_want_write_file(filp); |
| 1842 | if (err) |
| 1843 | return err; |
| 1844 | |
| 1845 | if (f2fs_readonly(sbi->sb)) { |
| 1846 | err = -EROFS; |
| 1847 | goto out; |
| 1848 | } |
| 1849 | |
| 1850 | if (copy_from_user(&range, (struct f2fs_defragment __user *)arg, |
| 1851 | sizeof(range))) { |
| 1852 | err = -EFAULT; |
| 1853 | goto out; |
| 1854 | } |
| 1855 | |
| 1856 | /* verify alignment of offset & size */ |
| 1857 | if (range.start & (F2FS_BLKSIZE - 1) || |
| 1858 | range.len & (F2FS_BLKSIZE - 1)) { |
| 1859 | err = -EINVAL; |
| 1860 | goto out; |
| 1861 | } |
| 1862 | |
| 1863 | err = f2fs_defragment_range(sbi, filp, &range); |
Jaegeuk Kim | 2c88a92 | 2016-01-08 16:57:48 -0800 | [diff] [blame] | 1864 | f2fs_update_time(sbi, REQ_TIME); |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1865 | if (err < 0) |
| 1866 | goto out; |
| 1867 | |
| 1868 | if (copy_to_user((struct f2fs_defragment __user *)arg, &range, |
| 1869 | sizeof(range))) |
| 1870 | err = -EFAULT; |
| 1871 | out: |
| 1872 | mnt_drop_write_file(filp); |
| 1873 | return err; |
| 1874 | } |
| 1875 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1876 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 1877 | { |
| 1878 | switch (cmd) { |
| 1879 | case F2FS_IOC_GETFLAGS: |
| 1880 | return f2fs_ioc_getflags(filp, arg); |
| 1881 | case F2FS_IOC_SETFLAGS: |
| 1882 | return f2fs_ioc_setflags(filp, arg); |
| 1883 | case F2FS_IOC_GETVERSION: |
| 1884 | return f2fs_ioc_getversion(filp, arg); |
| 1885 | case F2FS_IOC_START_ATOMIC_WRITE: |
| 1886 | return f2fs_ioc_start_atomic_write(filp); |
| 1887 | case F2FS_IOC_COMMIT_ATOMIC_WRITE: |
| 1888 | return f2fs_ioc_commit_atomic_write(filp); |
| 1889 | case F2FS_IOC_START_VOLATILE_WRITE: |
| 1890 | return f2fs_ioc_start_volatile_write(filp); |
| 1891 | case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
| 1892 | return f2fs_ioc_release_volatile_write(filp); |
| 1893 | case F2FS_IOC_ABORT_VOLATILE_WRITE: |
| 1894 | return f2fs_ioc_abort_volatile_write(filp); |
| 1895 | case FS_IOC_SHUTDOWN: |
| 1896 | return f2fs_ioc_shutdown(filp, arg); |
| 1897 | case FITRIM: |
| 1898 | return f2fs_ioc_fitrim(filp, arg); |
| 1899 | case F2FS_IOC_SET_ENCRYPTION_POLICY: |
| 1900 | return f2fs_ioc_set_encryption_policy(filp, arg); |
| 1901 | case F2FS_IOC_GET_ENCRYPTION_POLICY: |
| 1902 | return f2fs_ioc_get_encryption_policy(filp, arg); |
| 1903 | case F2FS_IOC_GET_ENCRYPTION_PWSALT: |
| 1904 | return f2fs_ioc_get_encryption_pwsalt(filp, arg); |
| 1905 | case F2FS_IOC_GARBAGE_COLLECT: |
| 1906 | return f2fs_ioc_gc(filp, arg); |
| 1907 | case F2FS_IOC_WRITE_CHECKPOINT: |
| 1908 | return f2fs_ioc_write_checkpoint(filp, arg); |
Chao Yu | c3c6ec6 | 2015-10-27 09:53:45 +0800 | [diff] [blame] | 1909 | case F2FS_IOC_DEFRAGMENT: |
| 1910 | return f2fs_ioc_defragment(filp, arg); |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1911 | default: |
| 1912 | return -ENOTTY; |
| 1913 | } |
| 1914 | } |
| 1915 | |
Jaegeuk Kim | 78c564b | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 1916 | static ssize_t f2fs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 1917 | unsigned long nr_segs, loff_t pos) |
| 1918 | { |
| 1919 | struct file *file = iocb->ki_filp; |
| 1920 | struct inode *inode = file_inode(file); |
Jaegeuk Kim | 422c30a | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 1921 | size_t count; |
Jaegeuk Kim | 78c564b | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 1922 | ssize_t ret; |
| 1923 | |
| 1924 | if (f2fs_encrypted_inode(inode) && |
Jaegeuk Kim | 86e0d58 | 2015-05-15 16:26:10 -0700 | [diff] [blame] | 1925 | !fscrypt_has_encryption_key(inode) && |
| 1926 | fscrypt_get_encryption_info(inode)) |
Jaegeuk Kim | 78c564b | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 1927 | return -EACCES; |
| 1928 | |
Jaegeuk Kim | 422c30a | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 1929 | ret = generic_segment_checks(iov, &nr_segs, &count, VERIFY_READ); |
| 1930 | if (ret) |
| 1931 | return ret; |
| 1932 | |
Jaegeuk Kim | 78c564b | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 1933 | inode_lock(inode); |
Jaegeuk Kim | 422c30a | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 1934 | ret = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode)); |
| 1935 | if (!ret) { |
| 1936 | ret = f2fs_preallocate_blocks(inode, pos, count, |
| 1937 | iocb->ki_filp->f_flags & O_DIRECT); |
| 1938 | if (!ret) |
| 1939 | ret = __generic_file_aio_write(iocb, iov, nr_segs, |
| 1940 | &iocb->ki_pos); |
| 1941 | } |
Jaegeuk Kim | 78c564b | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 1942 | inode_unlock(inode); |
| 1943 | |
| 1944 | if (ret > 0 || ret == -EIOCBQUEUED) { |
| 1945 | ssize_t err; |
| 1946 | |
| 1947 | err = generic_write_sync(file, iocb->ki_pos - ret, ret); |
| 1948 | if (err < 0 && ret > 0) |
| 1949 | ret = err; |
| 1950 | } |
| 1951 | return ret; |
| 1952 | } |
| 1953 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1954 | #ifdef CONFIG_COMPAT |
| 1955 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 1956 | { |
| 1957 | switch (cmd) { |
| 1958 | case F2FS_IOC32_GETFLAGS: |
| 1959 | cmd = F2FS_IOC_GETFLAGS; |
| 1960 | break; |
| 1961 | case F2FS_IOC32_SETFLAGS: |
| 1962 | cmd = F2FS_IOC_SETFLAGS; |
| 1963 | break; |
Chao Yu | 8eb900d | 2015-11-10 18:44:20 +0800 | [diff] [blame] | 1964 | case F2FS_IOC32_GETVERSION: |
| 1965 | cmd = F2FS_IOC_GETVERSION; |
| 1966 | break; |
| 1967 | case F2FS_IOC_START_ATOMIC_WRITE: |
| 1968 | case F2FS_IOC_COMMIT_ATOMIC_WRITE: |
| 1969 | case F2FS_IOC_START_VOLATILE_WRITE: |
| 1970 | case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
| 1971 | case F2FS_IOC_ABORT_VOLATILE_WRITE: |
| 1972 | case FS_IOC_SHUTDOWN: |
| 1973 | case F2FS_IOC_SET_ENCRYPTION_POLICY: |
| 1974 | case F2FS_IOC_GET_ENCRYPTION_PWSALT: |
| 1975 | case F2FS_IOC_GET_ENCRYPTION_POLICY: |
| 1976 | case F2FS_IOC_GARBAGE_COLLECT: |
| 1977 | case F2FS_IOC_WRITE_CHECKPOINT: |
| 1978 | case F2FS_IOC_DEFRAGMENT: |
| 1979 | break; |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 1980 | default: |
| 1981 | return -ENOIOCTLCMD; |
| 1982 | } |
| 1983 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
| 1984 | } |
| 1985 | #endif |
| 1986 | |
Jaegeuk Kim | 422c30a | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 1987 | static ssize_t f2fs_file_splice_write(struct pipe_inode_info *pipe, |
| 1988 | struct file *out, |
| 1989 | loff_t *ppos, size_t len, unsigned int flags) |
| 1990 | { |
| 1991 | struct address_space *mapping = out->f_mapping; |
| 1992 | struct inode *inode = mapping->host; |
| 1993 | int ret; |
| 1994 | |
| 1995 | ret = generic_write_checks(out, ppos, &len, S_ISBLK(inode->i_mode)); |
| 1996 | if (ret) |
| 1997 | return ret; |
| 1998 | ret = f2fs_preallocate_blocks(inode, *ppos, len, false); |
| 1999 | if (ret) |
| 2000 | return ret; |
| 2001 | return generic_file_splice_write(pipe, out, ppos, len, flags); |
| 2002 | } |
| 2003 | |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 2004 | const struct file_operations f2fs_file_operations = { |
| 2005 | .llseek = f2fs_llseek, |
| 2006 | .read = do_sync_read, |
| 2007 | .write = do_sync_write, |
| 2008 | .aio_read = generic_file_aio_read, |
Jaegeuk Kim | 78c564b | 2016-02-03 13:09:09 -0800 | [diff] [blame] | 2009 | .aio_write = f2fs_file_aio_write, |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 2010 | .open = f2fs_file_open, |
| 2011 | .release = f2fs_release_file, |
| 2012 | .mmap = f2fs_file_mmap, |
| 2013 | .fsync = f2fs_sync_file, |
| 2014 | .fallocate = f2fs_fallocate, |
| 2015 | .unlocked_ioctl = f2fs_ioctl, |
| 2016 | #ifdef CONFIG_COMPAT |
| 2017 | .compat_ioctl = f2fs_compat_ioctl, |
| 2018 | #endif |
| 2019 | .splice_read = generic_file_splice_read, |
Jaegeuk Kim | 422c30a | 2016-02-03 13:49:44 -0800 | [diff] [blame] | 2020 | .splice_write = f2fs_file_splice_write, |
Jaegeuk Kim | 315f455 | 2015-11-29 09:25:08 -0800 | [diff] [blame] | 2021 | }; |