| 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/uuid.h> |
| 24 | |
| 25 | #include "f2fs.h" |
| 26 | #include "node.h" |
| 27 | #include "segment.h" |
| 28 | #include "xattr.h" |
| 29 | #include "acl.h" |
| 30 | #include "gc.h" |
| 31 | #include "trace.h" |
| 32 | #include <trace/events/f2fs.h> |
| 33 | |
| 34 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, |
| 35 | struct vm_fault *vmf) |
| 36 | { |
| 37 | struct page *page = vmf->page; |
| 38 | struct inode *inode = file_inode(vma->vm_file); |
| 39 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 40 | struct dnode_of_data dn; |
| 41 | int err; |
| 42 | |
| 43 | sb_start_pagefault(inode->i_sb); |
| 44 | |
| 45 | f2fs_bug_on(sbi, f2fs_has_inline_data(inode)); |
| 46 | |
| 47 | /* block allocation */ |
| 48 | f2fs_lock_op(sbi); |
| 49 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 50 | err = f2fs_reserve_block(&dn, page->index); |
| 51 | if (err) { |
| 52 | f2fs_unlock_op(sbi); |
| 53 | goto out; |
| 54 | } |
| 55 | f2fs_put_dnode(&dn); |
| 56 | f2fs_unlock_op(sbi); |
| 57 | |
| 58 | f2fs_balance_fs(sbi, dn.node_changed); |
| 59 | |
| 60 | file_update_time(vma->vm_file); |
| 61 | lock_page(page); |
| 62 | if (unlikely(page->mapping != inode->i_mapping || |
| 63 | page_offset(page) > i_size_read(inode) || |
| 64 | !PageUptodate(page))) { |
| 65 | unlock_page(page); |
| 66 | err = -EFAULT; |
| 67 | goto out; |
| 68 | } |
| 69 | |
| 70 | /* |
| 71 | * check to see if the page is mapped already (no holes) |
| 72 | */ |
| 73 | if (PageMappedToDisk(page)) |
| 74 | goto mapped; |
| 75 | |
| 76 | /* page is wholly or partially inside EOF */ |
| 77 | if (((loff_t)(page->index + 1) << PAGE_SHIFT) > |
| 78 | i_size_read(inode)) { |
| 79 | unsigned offset; |
| 80 | offset = i_size_read(inode) & ~PAGE_MASK; |
| 81 | zero_user_segment(page, offset, PAGE_SIZE); |
| 82 | } |
| 83 | set_page_dirty(page); |
| 84 | if (!PageUptodate(page)) |
| 85 | SetPageUptodate(page); |
| 86 | |
| 87 | trace_f2fs_vm_page_mkwrite(page, DATA); |
| 88 | mapped: |
| 89 | /* fill the page */ |
| 90 | f2fs_wait_on_page_writeback(page, DATA, false); |
| 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: |
| 99 | sb_end_pagefault(inode->i_sb); |
| 100 | f2fs_update_time(sbi, REQ_TIME); |
| 101 | return block_page_mkwrite_return(err); |
| 102 | } |
| 103 | |
| 104 | static const struct vm_operations_struct f2fs_file_vm_ops = { |
| 105 | .fault = filemap_fault, |
| 106 | .map_pages = filemap_map_pages, |
| 107 | .page_mkwrite = f2fs_vm_page_mkwrite, |
| 108 | }; |
| 109 | |
| 110 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
| 111 | { |
| 112 | struct dentry *dentry; |
| 113 | |
| 114 | inode = igrab(inode); |
| 115 | dentry = d_find_any_alias(inode); |
| 116 | iput(inode); |
| 117 | if (!dentry) |
| 118 | return 0; |
| 119 | |
| 120 | if (update_dent_inode(inode, inode, &dentry->d_name)) { |
| 121 | dput(dentry); |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | *pino = parent_ino(dentry); |
| 126 | dput(dentry); |
| 127 | return 1; |
| 128 | } |
| 129 | |
| 130 | static inline bool need_do_checkpoint(struct inode *inode) |
| 131 | { |
| 132 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 133 | bool need_cp = false; |
| 134 | |
| 135 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
| 136 | need_cp = true; |
| 137 | else if (file_enc_name(inode) && need_dentry_mark(sbi, inode->i_ino)) |
| 138 | need_cp = true; |
| 139 | else if (file_wrong_pino(inode)) |
| 140 | need_cp = true; |
| 141 | else if (!space_for_roll_forward(sbi)) |
| 142 | need_cp = true; |
| 143 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
| 144 | need_cp = true; |
| 145 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) |
| 146 | need_cp = true; |
| 147 | else if (test_opt(sbi, FASTBOOT)) |
| 148 | need_cp = true; |
| 149 | else if (sbi->active_logs == 2) |
| 150 | need_cp = true; |
| 151 | |
| 152 | return need_cp; |
| 153 | } |
| 154 | |
| 155 | static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino) |
| 156 | { |
| 157 | struct page *i = find_get_page(NODE_MAPPING(sbi), ino); |
| 158 | bool ret = false; |
| 159 | /* But we need to avoid that there are some inode updates */ |
| 160 | if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) |
| 161 | ret = true; |
| 162 | f2fs_put_page(i, 0); |
| 163 | return ret; |
| 164 | } |
| 165 | |
| 166 | static void try_to_fix_pino(struct inode *inode) |
| 167 | { |
| 168 | struct f2fs_inode_info *fi = F2FS_I(inode); |
| 169 | nid_t pino; |
| 170 | |
| 171 | down_write(&fi->i_sem); |
| 172 | fi->xattr_ver = 0; |
| 173 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
| 174 | get_parent_ino(inode, &pino)) { |
| 175 | f2fs_i_pino_write(inode, pino); |
| 176 | file_got_pino(inode); |
| 177 | } |
| 178 | up_write(&fi->i_sem); |
| 179 | } |
| 180 | |
| 181 | static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end, |
| 182 | int datasync, bool atomic) |
| 183 | { |
| 184 | struct inode *inode = file->f_mapping->host; |
| 185 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 186 | nid_t ino = inode->i_ino; |
| 187 | int ret = 0; |
| 188 | bool need_cp = false; |
| 189 | struct writeback_control wbc = { |
| 190 | .sync_mode = WB_SYNC_ALL, |
| 191 | .nr_to_write = LONG_MAX, |
| 192 | .for_reclaim = 0, |
| 193 | }; |
| 194 | |
| 195 | if (unlikely(f2fs_readonly(inode->i_sb))) |
| 196 | return 0; |
| 197 | |
| 198 | trace_f2fs_sync_file_enter(inode); |
| 199 | |
| 200 | /* if fdatasync is triggered, let's do in-place-update */ |
| 201 | if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks) |
| 202 | set_inode_flag(inode, FI_NEED_IPU); |
| 203 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
| 204 | clear_inode_flag(inode, FI_NEED_IPU); |
| 205 | |
| 206 | if (ret) { |
| 207 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
| 208 | return ret; |
| 209 | } |
| 210 | |
| 211 | /* if the inode is dirty, let's recover all the time */ |
| 212 | if (!datasync && !f2fs_skip_inode_update(inode)) { |
| 213 | f2fs_write_inode(inode, NULL); |
| 214 | goto go_write; |
| 215 | } |
| 216 | |
| 217 | /* |
| 218 | * if there is no written data, don't waste time to write recovery info. |
| 219 | */ |
| 220 | if (!is_inode_flag_set(inode, FI_APPEND_WRITE) && |
| 221 | !exist_written_data(sbi, ino, APPEND_INO)) { |
| 222 | |
| 223 | /* it may call write_inode just prior to fsync */ |
| 224 | if (need_inode_page_update(sbi, ino)) |
| 225 | goto go_write; |
| 226 | |
| 227 | if (is_inode_flag_set(inode, FI_UPDATE_WRITE) || |
| 228 | exist_written_data(sbi, ino, UPDATE_INO)) |
| 229 | goto flush_out; |
| 230 | goto out; |
| 231 | } |
| 232 | go_write: |
| 233 | /* |
| 234 | * Both of fdatasync() and fsync() are able to be recovered from |
| 235 | * sudden-power-off. |
| 236 | */ |
| 237 | down_read(&F2FS_I(inode)->i_sem); |
| 238 | need_cp = need_do_checkpoint(inode); |
| 239 | up_read(&F2FS_I(inode)->i_sem); |
| 240 | |
| 241 | if (need_cp) { |
| 242 | /* all the dirty node pages should be flushed for POR */ |
| 243 | ret = f2fs_sync_fs(inode->i_sb, 1); |
| 244 | |
| 245 | /* |
| 246 | * We've secured consistency through sync_fs. Following pino |
| 247 | * will be used only for fsynced inodes after checkpoint. |
| 248 | */ |
| 249 | try_to_fix_pino(inode); |
| 250 | clear_inode_flag(inode, FI_APPEND_WRITE); |
| 251 | clear_inode_flag(inode, FI_UPDATE_WRITE); |
| 252 | goto out; |
| 253 | } |
| 254 | sync_nodes: |
| 255 | ret = fsync_node_pages(sbi, inode, &wbc, atomic); |
| 256 | if (ret) |
| 257 | goto out; |
| 258 | |
| 259 | /* if cp_error was enabled, we should avoid infinite loop */ |
| 260 | if (unlikely(f2fs_cp_error(sbi))) { |
| 261 | ret = -EIO; |
| 262 | goto out; |
| 263 | } |
| 264 | |
| 265 | if (need_inode_block_update(sbi, ino)) { |
| 266 | mark_inode_dirty_sync(inode); |
| 267 | f2fs_write_inode(inode, NULL); |
| 268 | goto sync_nodes; |
| 269 | } |
| 270 | |
| 271 | ret = wait_on_node_pages_writeback(sbi, ino); |
| 272 | if (ret) |
| 273 | goto out; |
| 274 | |
| 275 | /* once recovery info is written, don't need to tack this */ |
| 276 | remove_ino_entry(sbi, ino, APPEND_INO); |
| 277 | clear_inode_flag(inode, FI_APPEND_WRITE); |
| 278 | flush_out: |
| 279 | remove_ino_entry(sbi, ino, UPDATE_INO); |
| 280 | clear_inode_flag(inode, FI_UPDATE_WRITE); |
| 281 | ret = f2fs_issue_flush(sbi); |
| 282 | f2fs_update_time(sbi, REQ_TIME); |
| 283 | out: |
| 284 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
| 285 | f2fs_trace_ios(NULL, 1); |
| 286 | return ret; |
| 287 | } |
| 288 | |
| 289 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
| 290 | { |
| 291 | return f2fs_do_sync_file(file, start, end, datasync, false); |
| 292 | } |
| 293 | |
| 294 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
| 295 | pgoff_t pgofs, int whence) |
| 296 | { |
| 297 | struct pagevec pvec; |
| 298 | int nr_pages; |
| 299 | |
| 300 | if (whence != SEEK_DATA) |
| 301 | return 0; |
| 302 | |
| 303 | /* find first dirty page index */ |
| 304 | pagevec_init(&pvec, 0); |
| 305 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, |
| 306 | PAGECACHE_TAG_DIRTY, 1); |
| 307 | pgofs = nr_pages ? pvec.pages[0]->index : ULONG_MAX; |
| 308 | pagevec_release(&pvec); |
| 309 | return pgofs; |
| 310 | } |
| 311 | |
| 312 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, |
| 313 | int whence) |
| 314 | { |
| 315 | switch (whence) { |
| 316 | case SEEK_DATA: |
| 317 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || |
| 318 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) |
| 319 | return true; |
| 320 | break; |
| 321 | case SEEK_HOLE: |
| 322 | if (blkaddr == NULL_ADDR) |
| 323 | return true; |
| 324 | break; |
| 325 | } |
| 326 | return false; |
| 327 | } |
| 328 | |
| 329 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
| 330 | { |
| 331 | struct inode *inode = file->f_mapping->host; |
| 332 | loff_t maxbytes = inode->i_sb->s_maxbytes; |
| 333 | struct dnode_of_data dn; |
| 334 | pgoff_t pgofs, end_offset, dirty; |
| 335 | loff_t data_ofs = offset; |
| 336 | loff_t isize; |
| 337 | int err = 0; |
| 338 | |
| 339 | inode_lock(inode); |
| 340 | |
| 341 | isize = i_size_read(inode); |
| 342 | if (offset >= isize) |
| 343 | goto fail; |
| 344 | |
| 345 | /* handle inline data case */ |
| 346 | if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) { |
| 347 | if (whence == SEEK_HOLE) |
| 348 | data_ofs = isize; |
| 349 | goto found; |
| 350 | } |
| 351 | |
| 352 | pgofs = (pgoff_t)(offset >> PAGE_SHIFT); |
| 353 | |
| 354 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
| 355 | |
| 356 | for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) { |
| 357 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 358 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE); |
| 359 | if (err && err != -ENOENT) { |
| 360 | goto fail; |
| 361 | } else if (err == -ENOENT) { |
| 362 | /* direct node does not exists */ |
| 363 | if (whence == SEEK_DATA) { |
| 364 | pgofs = get_next_page_offset(&dn, pgofs); |
| 365 | continue; |
| 366 | } else { |
| 367 | goto found; |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
| 372 | |
| 373 | /* find data/hole in dnode block */ |
| 374 | for (; dn.ofs_in_node < end_offset; |
| 375 | dn.ofs_in_node++, pgofs++, |
| 376 | data_ofs = (loff_t)pgofs << PAGE_SHIFT) { |
| 377 | block_t blkaddr; |
| 378 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
| 379 | |
| 380 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
| 381 | f2fs_put_dnode(&dn); |
| 382 | goto found; |
| 383 | } |
| 384 | } |
| 385 | f2fs_put_dnode(&dn); |
| 386 | } |
| 387 | |
| 388 | if (whence == SEEK_DATA) |
| 389 | goto fail; |
| 390 | found: |
| 391 | if (whence == SEEK_HOLE && data_ofs > isize) |
| 392 | data_ofs = isize; |
| 393 | inode_unlock(inode); |
| 394 | return vfs_setpos(file, data_ofs, maxbytes); |
| 395 | fail: |
| 396 | inode_unlock(inode); |
| 397 | return -ENXIO; |
| 398 | } |
| 399 | |
| 400 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) |
| 401 | { |
| 402 | struct inode *inode = file->f_mapping->host; |
| 403 | loff_t maxbytes = inode->i_sb->s_maxbytes; |
| 404 | |
| 405 | switch (whence) { |
| 406 | case SEEK_SET: |
| 407 | case SEEK_CUR: |
| 408 | case SEEK_END: |
| 409 | return generic_file_llseek_size(file, offset, whence, |
| 410 | maxbytes, i_size_read(inode)); |
| 411 | case SEEK_DATA: |
| 412 | case SEEK_HOLE: |
| 413 | if (offset < 0) |
| 414 | return -ENXIO; |
| 415 | return f2fs_seek_block(file, offset, whence); |
| 416 | } |
| 417 | |
| 418 | return -EINVAL; |
| 419 | } |
| 420 | |
| 421 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
| 422 | { |
| 423 | struct inode *inode = file_inode(file); |
| 424 | int err; |
| 425 | |
| 426 | if (f2fs_encrypted_inode(inode)) { |
| 427 | err = fscrypt_get_encryption_info(inode); |
| 428 | if (err) |
| 429 | return 0; |
| 430 | if (!f2fs_encrypted_inode(inode)) |
| 431 | return -ENOKEY; |
| 432 | } |
| 433 | |
| 434 | /* we don't need to use inline_data strictly */ |
| 435 | err = f2fs_convert_inline_inode(inode); |
| 436 | if (err) |
| 437 | return err; |
| 438 | |
| 439 | file_accessed(file); |
| 440 | vma->vm_ops = &f2fs_file_vm_ops; |
| 441 | return 0; |
| 442 | } |
| 443 | |
| 444 | static int f2fs_file_open(struct inode *inode, struct file *filp) |
| 445 | { |
| 446 | int ret = generic_file_open(inode, filp); |
| 447 | struct dentry *dir; |
| 448 | |
| 449 | if (!ret && f2fs_encrypted_inode(inode)) { |
| 450 | ret = fscrypt_get_encryption_info(inode); |
| 451 | if (ret) |
| 452 | return -EACCES; |
| 453 | if (!fscrypt_has_encryption_key(inode)) |
| 454 | return -ENOKEY; |
| 455 | } |
| 456 | dir = dget_parent(file_dentry(filp)); |
| 457 | if (f2fs_encrypted_inode(d_inode(dir)) && |
| 458 | !fscrypt_has_permitted_context(d_inode(dir), inode)) { |
| 459 | dput(dir); |
| 460 | return -EPERM; |
| 461 | } |
| 462 | dput(dir); |
| 463 | return ret; |
| 464 | } |
| 465 | |
| 466 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
| 467 | { |
| 468 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
| 469 | struct f2fs_node *raw_node; |
| 470 | int nr_free = 0, ofs = dn->ofs_in_node, len = count; |
| 471 | __le32 *addr; |
| 472 | |
| 473 | raw_node = F2FS_NODE(dn->node_page); |
| 474 | addr = blkaddr_in_node(raw_node) + ofs; |
| 475 | |
| 476 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
| 477 | block_t blkaddr = le32_to_cpu(*addr); |
| 478 | if (blkaddr == NULL_ADDR) |
| 479 | continue; |
| 480 | |
| 481 | dn->data_blkaddr = NULL_ADDR; |
| 482 | set_data_blkaddr(dn); |
| 483 | invalidate_blocks(sbi, blkaddr); |
| 484 | if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page)) |
| 485 | clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN); |
| 486 | nr_free++; |
| 487 | } |
| 488 | |
| 489 | if (nr_free) { |
| 490 | pgoff_t fofs; |
| 491 | /* |
| 492 | * once we invalidate valid blkaddr in range [ofs, ofs + count], |
| 493 | * we will invalidate all blkaddr in the whole range. |
| 494 | */ |
| 495 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), |
| 496 | dn->inode) + ofs; |
| 497 | f2fs_update_extent_cache_range(dn, fofs, 0, len); |
| 498 | dec_valid_block_count(sbi, dn->inode, nr_free); |
| 499 | } |
| 500 | dn->ofs_in_node = ofs; |
| 501 | |
| 502 | f2fs_update_time(sbi, REQ_TIME); |
| 503 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, |
| 504 | dn->ofs_in_node, nr_free); |
| 505 | return nr_free; |
| 506 | } |
| 507 | |
| 508 | void truncate_data_blocks(struct dnode_of_data *dn) |
| 509 | { |
| 510 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); |
| 511 | } |
| 512 | |
| 513 | static int truncate_partial_data_page(struct inode *inode, u64 from, |
| 514 | bool cache_only) |
| 515 | { |
| 516 | unsigned offset = from & (PAGE_SIZE - 1); |
| 517 | pgoff_t index = from >> PAGE_SHIFT; |
| 518 | struct address_space *mapping = inode->i_mapping; |
| 519 | struct page *page; |
| 520 | |
| 521 | if (!offset && !cache_only) |
| 522 | return 0; |
| 523 | |
| 524 | if (cache_only) { |
| 525 | page = f2fs_grab_cache_page(mapping, index, false); |
| 526 | if (page && PageUptodate(page)) |
| 527 | goto truncate_out; |
| 528 | f2fs_put_page(page, 1); |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | page = get_lock_data_page(inode, index, true); |
| 533 | if (IS_ERR(page)) |
| 534 | return 0; |
| 535 | truncate_out: |
| 536 | f2fs_wait_on_page_writeback(page, DATA, true); |
| 537 | zero_user(page, offset, PAGE_SIZE - offset); |
| 538 | if (!cache_only || !f2fs_encrypted_inode(inode) || |
| 539 | !S_ISREG(inode->i_mode)) |
| 540 | set_page_dirty(page); |
| 541 | f2fs_put_page(page, 1); |
| 542 | return 0; |
| 543 | } |
| 544 | |
| 545 | int truncate_blocks(struct inode *inode, u64 from, bool lock) |
| 546 | { |
| 547 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 548 | unsigned int blocksize = inode->i_sb->s_blocksize; |
| 549 | struct dnode_of_data dn; |
| 550 | pgoff_t free_from; |
| 551 | int count = 0, err = 0; |
| 552 | struct page *ipage; |
| 553 | bool truncate_page = false; |
| 554 | |
| 555 | trace_f2fs_truncate_blocks_enter(inode, from); |
| 556 | |
| 557 | free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1); |
| 558 | |
| 559 | if (free_from >= sbi->max_file_blocks) |
| 560 | goto free_partial; |
| 561 | |
| 562 | if (lock) |
| 563 | f2fs_lock_op(sbi); |
| 564 | |
| 565 | ipage = get_node_page(sbi, inode->i_ino); |
| 566 | if (IS_ERR(ipage)) { |
| 567 | err = PTR_ERR(ipage); |
| 568 | goto out; |
| 569 | } |
| 570 | |
| 571 | if (f2fs_has_inline_data(inode)) { |
| 572 | if (truncate_inline_inode(ipage, from)) |
| 573 | set_page_dirty(ipage); |
| 574 | f2fs_put_page(ipage, 1); |
| 575 | truncate_page = true; |
| 576 | goto out; |
| 577 | } |
| 578 | |
| 579 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
| 580 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA); |
| 581 | if (err) { |
| 582 | if (err == -ENOENT) |
| 583 | goto free_next; |
| 584 | goto out; |
| 585 | } |
| 586 | |
| 587 | count = ADDRS_PER_PAGE(dn.node_page, inode); |
| 588 | |
| 589 | count -= dn.ofs_in_node; |
| 590 | f2fs_bug_on(sbi, count < 0); |
| 591 | |
| 592 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
| 593 | truncate_data_blocks_range(&dn, count); |
| 594 | free_from += count; |
| 595 | } |
| 596 | |
| 597 | f2fs_put_dnode(&dn); |
| 598 | free_next: |
| 599 | err = truncate_inode_blocks(inode, free_from); |
| 600 | out: |
| 601 | if (lock) |
| 602 | f2fs_unlock_op(sbi); |
| 603 | free_partial: |
| 604 | /* lastly zero out the first data page */ |
| 605 | if (!err) |
| 606 | err = truncate_partial_data_page(inode, from, truncate_page); |
| 607 | |
| 608 | trace_f2fs_truncate_blocks_exit(inode, err); |
| 609 | return err; |
| 610 | } |
| 611 | |
| 612 | int f2fs_truncate(struct inode *inode) |
| 613 | { |
| 614 | int err; |
| 615 | |
| 616 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
| 617 | S_ISLNK(inode->i_mode))) |
| 618 | return 0; |
| 619 | |
| 620 | trace_f2fs_truncate(inode); |
| 621 | |
| 622 | /* we should check inline_data size */ |
| 623 | if (!f2fs_may_inline_data(inode)) { |
| 624 | err = f2fs_convert_inline_inode(inode); |
| 625 | if (err) |
| 626 | return err; |
| 627 | } |
| 628 | |
| 629 | err = truncate_blocks(inode, i_size_read(inode), true); |
| 630 | if (err) |
| 631 | return err; |
| 632 | |
| 633 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 634 | mark_inode_dirty_sync(inode); |
| 635 | return 0; |
| 636 | } |
| 637 | |
| 638 | int f2fs_getattr(struct vfsmount *mnt, |
| 639 | struct dentry *dentry, struct kstat *stat) |
| 640 | { |
| 641 | struct inode *inode = d_inode(dentry); |
| 642 | generic_fillattr(inode, stat); |
| 643 | stat->blocks <<= 3; |
| 644 | return 0; |
| 645 | } |
| 646 | |
| 647 | #ifdef CONFIG_F2FS_FS_POSIX_ACL |
| 648 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) |
| 649 | { |
| 650 | unsigned int ia_valid = attr->ia_valid; |
| 651 | |
| 652 | if (ia_valid & ATTR_UID) |
| 653 | inode->i_uid = attr->ia_uid; |
| 654 | if (ia_valid & ATTR_GID) |
| 655 | inode->i_gid = attr->ia_gid; |
| 656 | if (ia_valid & ATTR_ATIME) |
| 657 | inode->i_atime = timespec_trunc(attr->ia_atime, |
| 658 | inode->i_sb->s_time_gran); |
| 659 | if (ia_valid & ATTR_MTIME) |
| 660 | inode->i_mtime = timespec_trunc(attr->ia_mtime, |
| 661 | inode->i_sb->s_time_gran); |
| 662 | if (ia_valid & ATTR_CTIME) |
| 663 | inode->i_ctime = timespec_trunc(attr->ia_ctime, |
| 664 | inode->i_sb->s_time_gran); |
| 665 | if (ia_valid & ATTR_MODE) { |
| 666 | umode_t mode = attr->ia_mode; |
| 667 | |
| 668 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) |
| 669 | mode &= ~S_ISGID; |
| 670 | set_acl_inode(inode, mode); |
| 671 | } |
| 672 | } |
| 673 | #else |
| 674 | #define __setattr_copy setattr_copy |
| 675 | #endif |
| 676 | |
| 677 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) |
| 678 | { |
| 679 | struct inode *inode = d_inode(dentry); |
| 680 | int err; |
| 681 | |
| 682 | err = inode_change_ok(inode, attr); |
| 683 | if (err) |
| 684 | return err; |
| 685 | |
| 686 | if (attr->ia_valid & ATTR_SIZE) { |
| 687 | if (f2fs_encrypted_inode(inode) && |
| 688 | fscrypt_get_encryption_info(inode)) |
| 689 | return -EACCES; |
| 690 | |
| 691 | if (attr->ia_size <= i_size_read(inode)) { |
| 692 | truncate_setsize(inode, attr->ia_size); |
| 693 | err = f2fs_truncate(inode); |
| 694 | if (err) |
| 695 | return err; |
| 696 | f2fs_balance_fs(F2FS_I_SB(inode), true); |
| 697 | } else { |
| 698 | /* |
| 699 | * do not trim all blocks after i_size if target size is |
| 700 | * larger than i_size. |
| 701 | */ |
| 702 | truncate_setsize(inode, attr->ia_size); |
| 703 | |
| 704 | /* should convert inline inode here */ |
| 705 | if (!f2fs_may_inline_data(inode)) { |
| 706 | err = f2fs_convert_inline_inode(inode); |
| 707 | if (err) |
| 708 | return err; |
| 709 | } |
| 710 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 711 | } |
| 712 | } |
| 713 | |
| 714 | __setattr_copy(inode, attr); |
| 715 | |
| 716 | if (attr->ia_valid & ATTR_MODE) { |
| 717 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
| 718 | if (err || is_inode_flag_set(inode, FI_ACL_MODE)) { |
| 719 | inode->i_mode = F2FS_I(inode)->i_acl_mode; |
| 720 | clear_inode_flag(inode, FI_ACL_MODE); |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | mark_inode_dirty_sync(inode); |
| 725 | return err; |
| 726 | } |
| 727 | |
| 728 | const struct inode_operations f2fs_file_inode_operations = { |
| 729 | .getattr = f2fs_getattr, |
| 730 | .setattr = f2fs_setattr, |
| 731 | .get_acl = f2fs_get_acl, |
| 732 | .set_acl = f2fs_set_acl, |
| 733 | #ifdef CONFIG_F2FS_FS_XATTR |
| 734 | .setxattr = generic_setxattr, |
| 735 | .getxattr = generic_getxattr, |
| 736 | .listxattr = f2fs_listxattr, |
| 737 | .removexattr = generic_removexattr, |
| 738 | #endif |
| 739 | .fiemap = f2fs_fiemap, |
| 740 | }; |
| 741 | |
| 742 | static int fill_zero(struct inode *inode, pgoff_t index, |
| 743 | loff_t start, loff_t len) |
| 744 | { |
| 745 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 746 | struct page *page; |
| 747 | |
| 748 | if (!len) |
| 749 | return 0; |
| 750 | |
| 751 | f2fs_balance_fs(sbi, true); |
| 752 | |
| 753 | f2fs_lock_op(sbi); |
| 754 | page = get_new_data_page(inode, NULL, index, false); |
| 755 | f2fs_unlock_op(sbi); |
| 756 | |
| 757 | if (IS_ERR(page)) |
| 758 | return PTR_ERR(page); |
| 759 | |
| 760 | f2fs_wait_on_page_writeback(page, DATA, true); |
| 761 | zero_user(page, start, len); |
| 762 | set_page_dirty(page); |
| 763 | f2fs_put_page(page, 1); |
| 764 | return 0; |
| 765 | } |
| 766 | |
| 767 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) |
| 768 | { |
| 769 | int err; |
| 770 | |
| 771 | while (pg_start < pg_end) { |
| 772 | struct dnode_of_data dn; |
| 773 | pgoff_t end_offset, count; |
| 774 | |
| 775 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 776 | err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE); |
| 777 | if (err) { |
| 778 | if (err == -ENOENT) { |
| 779 | pg_start++; |
| 780 | continue; |
| 781 | } |
| 782 | return err; |
| 783 | } |
| 784 | |
| 785 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
| 786 | count = min(end_offset - dn.ofs_in_node, pg_end - pg_start); |
| 787 | |
| 788 | f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset); |
| 789 | |
| 790 | truncate_data_blocks_range(&dn, count); |
| 791 | f2fs_put_dnode(&dn); |
| 792 | |
| 793 | pg_start += count; |
| 794 | } |
| 795 | return 0; |
| 796 | } |
| 797 | |
| 798 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
| 799 | { |
| 800 | pgoff_t pg_start, pg_end; |
| 801 | loff_t off_start, off_end; |
| 802 | int ret; |
| 803 | |
| 804 | ret = f2fs_convert_inline_inode(inode); |
| 805 | if (ret) |
| 806 | return ret; |
| 807 | |
| 808 | pg_start = ((unsigned long long) offset) >> PAGE_SHIFT; |
| 809 | pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT; |
| 810 | |
| 811 | off_start = offset & (PAGE_SIZE - 1); |
| 812 | off_end = (offset + len) & (PAGE_SIZE - 1); |
| 813 | |
| 814 | if (pg_start == pg_end) { |
| 815 | ret = fill_zero(inode, pg_start, off_start, |
| 816 | off_end - off_start); |
| 817 | if (ret) |
| 818 | return ret; |
| 819 | } else { |
| 820 | if (off_start) { |
| 821 | ret = fill_zero(inode, pg_start++, off_start, |
| 822 | PAGE_SIZE - off_start); |
| 823 | if (ret) |
| 824 | return ret; |
| 825 | } |
| 826 | if (off_end) { |
| 827 | ret = fill_zero(inode, pg_end, 0, off_end); |
| 828 | if (ret) |
| 829 | return ret; |
| 830 | } |
| 831 | |
| 832 | if (pg_start < pg_end) { |
| 833 | struct address_space *mapping = inode->i_mapping; |
| 834 | loff_t blk_start, blk_end; |
| 835 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 836 | |
| 837 | f2fs_balance_fs(sbi, true); |
| 838 | |
| 839 | blk_start = (loff_t)pg_start << PAGE_SHIFT; |
| 840 | blk_end = (loff_t)pg_end << PAGE_SHIFT; |
| 841 | truncate_inode_pages_range(mapping, blk_start, |
| 842 | blk_end - 1); |
| 843 | |
| 844 | f2fs_lock_op(sbi); |
| 845 | ret = truncate_hole(inode, pg_start, pg_end); |
| 846 | f2fs_unlock_op(sbi); |
| 847 | } |
| 848 | } |
| 849 | |
| 850 | return ret; |
| 851 | } |
| 852 | |
| 853 | static int __exchange_data_block(struct inode *inode, pgoff_t src, |
| 854 | pgoff_t dst, bool full) |
| 855 | { |
| 856 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 857 | struct dnode_of_data dn; |
| 858 | block_t new_addr; |
| 859 | bool do_replace = false; |
| 860 | int ret; |
| 861 | |
| 862 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 863 | ret = get_dnode_of_data(&dn, src, LOOKUP_NODE_RA); |
| 864 | if (ret && ret != -ENOENT) { |
| 865 | return ret; |
| 866 | } else if (ret == -ENOENT) { |
| 867 | new_addr = NULL_ADDR; |
| 868 | } else { |
| 869 | new_addr = dn.data_blkaddr; |
| 870 | if (!is_checkpointed_data(sbi, new_addr)) { |
| 871 | /* do not invalidate this block address */ |
| 872 | f2fs_update_data_blkaddr(&dn, NULL_ADDR); |
| 873 | do_replace = true; |
| 874 | } |
| 875 | f2fs_put_dnode(&dn); |
| 876 | } |
| 877 | |
| 878 | if (new_addr == NULL_ADDR) |
| 879 | return full ? truncate_hole(inode, dst, dst + 1) : 0; |
| 880 | |
| 881 | if (do_replace) { |
| 882 | struct page *ipage; |
| 883 | struct node_info ni; |
| 884 | |
| 885 | if (test_opt(sbi, LFS)) { |
| 886 | ret = -ENOTSUPP; |
| 887 | goto err_out; |
| 888 | } |
| 889 | |
| 890 | ipage = get_node_page(sbi, inode->i_ino); |
| 891 | if (IS_ERR(ipage)) { |
| 892 | ret = PTR_ERR(ipage); |
| 893 | goto err_out; |
| 894 | } |
| 895 | |
| 896 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
| 897 | ret = f2fs_reserve_block(&dn, dst); |
| 898 | if (ret) |
| 899 | goto err_out; |
| 900 | |
| 901 | truncate_data_blocks_range(&dn, 1); |
| 902 | |
| 903 | get_node_info(sbi, dn.nid, &ni); |
| 904 | f2fs_replace_block(sbi, &dn, dn.data_blkaddr, new_addr, |
| 905 | ni.version, true, false); |
| 906 | f2fs_put_dnode(&dn); |
| 907 | } else { |
| 908 | struct page *psrc, *pdst; |
| 909 | |
| 910 | psrc = get_lock_data_page(inode, src, true); |
| 911 | if (IS_ERR(psrc)) |
| 912 | return PTR_ERR(psrc); |
| 913 | pdst = get_new_data_page(inode, NULL, dst, true); |
| 914 | if (IS_ERR(pdst)) { |
| 915 | f2fs_put_page(psrc, 1); |
| 916 | return PTR_ERR(pdst); |
| 917 | } |
| 918 | f2fs_copy_page(psrc, pdst); |
| 919 | set_page_dirty(pdst); |
| 920 | f2fs_put_page(pdst, 1); |
| 921 | f2fs_put_page(psrc, 1); |
| 922 | |
| 923 | return truncate_hole(inode, src, src + 1); |
| 924 | } |
| 925 | return 0; |
| 926 | |
| 927 | err_out: |
| 928 | if (!get_dnode_of_data(&dn, src, LOOKUP_NODE)) { |
| 929 | f2fs_update_data_blkaddr(&dn, new_addr); |
| 930 | f2fs_put_dnode(&dn); |
| 931 | } |
| 932 | return ret; |
| 933 | } |
| 934 | |
| 935 | static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end) |
| 936 | { |
| 937 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 938 | pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; |
| 939 | int ret = 0; |
| 940 | |
| 941 | for (; end < nrpages; start++, end++) { |
| 942 | f2fs_balance_fs(sbi, true); |
| 943 | f2fs_lock_op(sbi); |
| 944 | ret = __exchange_data_block(inode, end, start, true); |
| 945 | f2fs_unlock_op(sbi); |
| 946 | if (ret) |
| 947 | break; |
| 948 | } |
| 949 | return ret; |
| 950 | } |
| 951 | |
| 952 | static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len) |
| 953 | { |
| 954 | pgoff_t pg_start, pg_end; |
| 955 | loff_t new_size; |
| 956 | int ret; |
| 957 | |
| 958 | if (offset + len >= i_size_read(inode)) |
| 959 | return -EINVAL; |
| 960 | |
| 961 | /* collapse range should be aligned to block size of f2fs. */ |
| 962 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) |
| 963 | return -EINVAL; |
| 964 | |
| 965 | ret = f2fs_convert_inline_inode(inode); |
| 966 | if (ret) |
| 967 | return ret; |
| 968 | |
| 969 | pg_start = offset >> PAGE_SHIFT; |
| 970 | pg_end = (offset + len) >> PAGE_SHIFT; |
| 971 | |
| 972 | /* write out all dirty pages from offset */ |
| 973 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| 974 | if (ret) |
| 975 | return ret; |
| 976 | |
| 977 | truncate_pagecache(inode, offset); |
| 978 | |
| 979 | ret = f2fs_do_collapse(inode, pg_start, pg_end); |
| 980 | if (ret) |
| 981 | return ret; |
| 982 | |
| 983 | /* write out all moved pages, if possible */ |
| 984 | filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| 985 | truncate_pagecache(inode, offset); |
| 986 | |
| 987 | new_size = i_size_read(inode) - len; |
| 988 | truncate_pagecache(inode, new_size); |
| 989 | |
| 990 | ret = truncate_blocks(inode, new_size, true); |
| 991 | if (!ret) |
| 992 | f2fs_i_size_write(inode, new_size); |
| 993 | |
| 994 | return ret; |
| 995 | } |
| 996 | |
| 997 | static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start, |
| 998 | pgoff_t end) |
| 999 | { |
| 1000 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
| 1001 | pgoff_t index = start; |
| 1002 | unsigned int ofs_in_node = dn->ofs_in_node; |
| 1003 | blkcnt_t count = 0; |
| 1004 | int ret; |
| 1005 | |
| 1006 | for (; index < end; index++, dn->ofs_in_node++) { |
| 1007 | if (datablock_addr(dn->node_page, dn->ofs_in_node) == NULL_ADDR) |
| 1008 | count++; |
| 1009 | } |
| 1010 | |
| 1011 | dn->ofs_in_node = ofs_in_node; |
| 1012 | ret = reserve_new_blocks(dn, count); |
| 1013 | if (ret) |
| 1014 | return ret; |
| 1015 | |
| 1016 | dn->ofs_in_node = ofs_in_node; |
| 1017 | for (index = start; index < end; index++, dn->ofs_in_node++) { |
| 1018 | dn->data_blkaddr = |
| 1019 | datablock_addr(dn->node_page, dn->ofs_in_node); |
| 1020 | /* |
| 1021 | * reserve_new_blocks will not guarantee entire block |
| 1022 | * allocation. |
| 1023 | */ |
| 1024 | if (dn->data_blkaddr == NULL_ADDR) { |
| 1025 | ret = -ENOSPC; |
| 1026 | break; |
| 1027 | } |
| 1028 | if (dn->data_blkaddr != NEW_ADDR) { |
| 1029 | invalidate_blocks(sbi, dn->data_blkaddr); |
| 1030 | dn->data_blkaddr = NEW_ADDR; |
| 1031 | set_data_blkaddr(dn); |
| 1032 | } |
| 1033 | } |
| 1034 | |
| 1035 | f2fs_update_extent_cache_range(dn, start, 0, index - start); |
| 1036 | |
| 1037 | return ret; |
| 1038 | } |
| 1039 | |
| 1040 | static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, |
| 1041 | int mode) |
| 1042 | { |
| 1043 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1044 | struct address_space *mapping = inode->i_mapping; |
| 1045 | pgoff_t index, pg_start, pg_end; |
| 1046 | loff_t new_size = i_size_read(inode); |
| 1047 | loff_t off_start, off_end; |
| 1048 | int ret = 0; |
| 1049 | |
| 1050 | ret = inode_newsize_ok(inode, (len + offset)); |
| 1051 | if (ret) |
| 1052 | return ret; |
| 1053 | |
| 1054 | ret = f2fs_convert_inline_inode(inode); |
| 1055 | if (ret) |
| 1056 | return ret; |
| 1057 | |
| 1058 | ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1); |
| 1059 | if (ret) |
| 1060 | return ret; |
| 1061 | |
| 1062 | truncate_pagecache_range(inode, offset, offset + len - 1); |
| 1063 | |
| 1064 | pg_start = ((unsigned long long) offset) >> PAGE_SHIFT; |
| 1065 | pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT; |
| 1066 | |
| 1067 | off_start = offset & (PAGE_SIZE - 1); |
| 1068 | off_end = (offset + len) & (PAGE_SIZE - 1); |
| 1069 | |
| 1070 | if (pg_start == pg_end) { |
| 1071 | ret = fill_zero(inode, pg_start, off_start, |
| 1072 | off_end - off_start); |
| 1073 | if (ret) |
| 1074 | return ret; |
| 1075 | |
| 1076 | if (offset + len > new_size) |
| 1077 | new_size = offset + len; |
| 1078 | new_size = max_t(loff_t, new_size, offset + len); |
| 1079 | } else { |
| 1080 | if (off_start) { |
| 1081 | ret = fill_zero(inode, pg_start++, off_start, |
| 1082 | PAGE_SIZE - off_start); |
| 1083 | if (ret) |
| 1084 | return ret; |
| 1085 | |
| 1086 | new_size = max_t(loff_t, new_size, |
| 1087 | (loff_t)pg_start << PAGE_SHIFT); |
| 1088 | } |
| 1089 | |
| 1090 | for (index = pg_start; index < pg_end;) { |
| 1091 | struct dnode_of_data dn; |
| 1092 | unsigned int end_offset; |
| 1093 | pgoff_t end; |
| 1094 | |
| 1095 | f2fs_lock_op(sbi); |
| 1096 | |
| 1097 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 1098 | ret = get_dnode_of_data(&dn, index, ALLOC_NODE); |
| 1099 | if (ret) { |
| 1100 | f2fs_unlock_op(sbi); |
| 1101 | goto out; |
| 1102 | } |
| 1103 | |
| 1104 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
| 1105 | end = min(pg_end, end_offset - dn.ofs_in_node + index); |
| 1106 | |
| 1107 | ret = f2fs_do_zero_range(&dn, index, end); |
| 1108 | f2fs_put_dnode(&dn); |
| 1109 | f2fs_unlock_op(sbi); |
| 1110 | if (ret) |
| 1111 | goto out; |
| 1112 | |
| 1113 | index = end; |
| 1114 | new_size = max_t(loff_t, new_size, |
| 1115 | (loff_t)index << PAGE_SHIFT); |
| 1116 | } |
| 1117 | |
| 1118 | if (off_end) { |
| 1119 | ret = fill_zero(inode, pg_end, 0, off_end); |
| 1120 | if (ret) |
| 1121 | goto out; |
| 1122 | |
| 1123 | new_size = max_t(loff_t, new_size, offset + len); |
| 1124 | } |
| 1125 | } |
| 1126 | |
| 1127 | out: |
| 1128 | if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) |
| 1129 | f2fs_i_size_write(inode, new_size); |
| 1130 | |
| 1131 | return ret; |
| 1132 | } |
| 1133 | |
| 1134 | static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) |
| 1135 | { |
| 1136 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1137 | pgoff_t pg_start, pg_end, delta, nrpages, idx; |
| 1138 | loff_t new_size; |
| 1139 | int ret = 0; |
| 1140 | |
| 1141 | new_size = i_size_read(inode) + len; |
| 1142 | if (new_size > inode->i_sb->s_maxbytes) |
| 1143 | return -EFBIG; |
| 1144 | |
| 1145 | if (offset >= i_size_read(inode)) |
| 1146 | return -EINVAL; |
| 1147 | |
| 1148 | /* insert range should be aligned to block size of f2fs. */ |
| 1149 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) |
| 1150 | return -EINVAL; |
| 1151 | |
| 1152 | ret = f2fs_convert_inline_inode(inode); |
| 1153 | if (ret) |
| 1154 | return ret; |
| 1155 | |
| 1156 | f2fs_balance_fs(sbi, true); |
| 1157 | |
| 1158 | ret = truncate_blocks(inode, i_size_read(inode), true); |
| 1159 | if (ret) |
| 1160 | return ret; |
| 1161 | |
| 1162 | /* write out all dirty pages from offset */ |
| 1163 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| 1164 | if (ret) |
| 1165 | return ret; |
| 1166 | |
| 1167 | truncate_pagecache(inode, offset); |
| 1168 | |
| 1169 | pg_start = offset >> PAGE_SHIFT; |
| 1170 | pg_end = (offset + len) >> PAGE_SHIFT; |
| 1171 | delta = pg_end - pg_start; |
| 1172 | nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; |
| 1173 | |
| 1174 | for (idx = nrpages - 1; idx >= pg_start && idx != -1; idx--) { |
| 1175 | f2fs_lock_op(sbi); |
| 1176 | ret = __exchange_data_block(inode, idx, idx + delta, false); |
| 1177 | f2fs_unlock_op(sbi); |
| 1178 | if (ret) |
| 1179 | break; |
| 1180 | } |
| 1181 | |
| 1182 | /* write out all moved pages, if possible */ |
| 1183 | filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| 1184 | truncate_pagecache(inode, offset); |
| 1185 | |
| 1186 | if (!ret) |
| 1187 | f2fs_i_size_write(inode, new_size); |
| 1188 | return ret; |
| 1189 | } |
| 1190 | |
| 1191 | static int expand_inode_data(struct inode *inode, loff_t offset, |
| 1192 | loff_t len, int mode) |
| 1193 | { |
| 1194 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1195 | struct f2fs_map_blocks map = { .m_next_pgofs = NULL }; |
| 1196 | pgoff_t pg_end; |
| 1197 | loff_t new_size = i_size_read(inode); |
| 1198 | loff_t off_end; |
| 1199 | int ret; |
| 1200 | |
| 1201 | ret = inode_newsize_ok(inode, (len + offset)); |
| 1202 | if (ret) |
| 1203 | return ret; |
| 1204 | |
| 1205 | ret = f2fs_convert_inline_inode(inode); |
| 1206 | if (ret) |
| 1207 | return ret; |
| 1208 | |
| 1209 | f2fs_balance_fs(sbi, true); |
| 1210 | |
| 1211 | pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT; |
| 1212 | off_end = (offset + len) & (PAGE_SIZE - 1); |
| 1213 | |
| 1214 | map.m_lblk = ((unsigned long long)offset) >> PAGE_SHIFT; |
| 1215 | map.m_len = pg_end - map.m_lblk; |
| 1216 | if (off_end) |
| 1217 | map.m_len++; |
| 1218 | |
| 1219 | ret = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); |
| 1220 | if (ret) { |
| 1221 | pgoff_t last_off; |
| 1222 | |
| 1223 | if (!map.m_len) |
| 1224 | return ret; |
| 1225 | |
| 1226 | last_off = map.m_lblk + map.m_len - 1; |
| 1227 | |
| 1228 | /* update new size to the failed position */ |
| 1229 | new_size = (last_off == pg_end) ? offset + len: |
| 1230 | (loff_t)(last_off + 1) << PAGE_SHIFT; |
| 1231 | } else { |
| 1232 | new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end; |
| 1233 | } |
| 1234 | |
| 1235 | if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) |
| 1236 | f2fs_i_size_write(inode, new_size); |
| 1237 | |
| 1238 | return ret; |
| 1239 | } |
| 1240 | |
| 1241 | static long f2fs_fallocate(struct file *file, int mode, |
| 1242 | loff_t offset, loff_t len) |
| 1243 | { |
| 1244 | struct inode *inode = file_inode(file); |
| 1245 | long ret = 0; |
| 1246 | |
| 1247 | /* f2fs only support ->fallocate for regular file */ |
| 1248 | if (!S_ISREG(inode->i_mode)) |
| 1249 | return -EINVAL; |
| 1250 | |
| 1251 | if (f2fs_encrypted_inode(inode) && |
| 1252 | (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE))) |
| 1253 | return -EOPNOTSUPP; |
| 1254 | |
| 1255 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | |
| 1256 | FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | |
| 1257 | FALLOC_FL_INSERT_RANGE)) |
| 1258 | return -EOPNOTSUPP; |
| 1259 | |
| 1260 | inode_lock(inode); |
| 1261 | |
| 1262 | if (mode & FALLOC_FL_PUNCH_HOLE) { |
| 1263 | if (offset >= inode->i_size) |
| 1264 | goto out; |
| 1265 | |
| 1266 | ret = punch_hole(inode, offset, len); |
| 1267 | } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
| 1268 | ret = f2fs_collapse_range(inode, offset, len); |
| 1269 | } else if (mode & FALLOC_FL_ZERO_RANGE) { |
| 1270 | ret = f2fs_zero_range(inode, offset, len, mode); |
| 1271 | } else if (mode & FALLOC_FL_INSERT_RANGE) { |
| 1272 | ret = f2fs_insert_range(inode, offset, len); |
| 1273 | } else { |
| 1274 | ret = expand_inode_data(inode, offset, len, mode); |
| 1275 | } |
| 1276 | |
| 1277 | if (!ret) { |
| 1278 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 1279 | mark_inode_dirty_sync(inode); |
| 1280 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1281 | } |
| 1282 | |
| 1283 | out: |
| 1284 | inode_unlock(inode); |
| 1285 | |
| 1286 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
| 1287 | return ret; |
| 1288 | } |
| 1289 | |
| 1290 | static int f2fs_release_file(struct inode *inode, struct file *filp) |
| 1291 | { |
| 1292 | /* |
| 1293 | * f2fs_relase_file is called at every close calls. So we should |
| 1294 | * not drop any inmemory pages by close called by other process. |
| 1295 | */ |
| 1296 | if (!(filp->f_mode & FMODE_WRITE) || |
| 1297 | atomic_read(&inode->i_writecount) != 1) |
| 1298 | return 0; |
| 1299 | |
| 1300 | /* some remained atomic pages should discarded */ |
| 1301 | if (f2fs_is_atomic_file(inode)) |
| 1302 | drop_inmem_pages(inode); |
| 1303 | if (f2fs_is_volatile_file(inode)) { |
| 1304 | clear_inode_flag(inode, FI_VOLATILE_FILE); |
| 1305 | set_inode_flag(inode, FI_DROP_CACHE); |
| 1306 | filemap_fdatawrite(inode->i_mapping); |
| 1307 | clear_inode_flag(inode, FI_DROP_CACHE); |
| 1308 | } |
| 1309 | return 0; |
| 1310 | } |
| 1311 | |
| 1312 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) |
| 1313 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) |
| 1314 | |
| 1315 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) |
| 1316 | { |
| 1317 | if (S_ISDIR(mode)) |
| 1318 | return flags; |
| 1319 | else if (S_ISREG(mode)) |
| 1320 | return flags & F2FS_REG_FLMASK; |
| 1321 | else |
| 1322 | return flags & F2FS_OTHER_FLMASK; |
| 1323 | } |
| 1324 | |
| 1325 | static int f2fs_ioc_getflags(struct file *filp, unsigned long arg) |
| 1326 | { |
| 1327 | struct inode *inode = file_inode(filp); |
| 1328 | struct f2fs_inode_info *fi = F2FS_I(inode); |
| 1329 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; |
| 1330 | return put_user(flags, (int __user *)arg); |
| 1331 | } |
| 1332 | |
| 1333 | static int f2fs_ioc_setflags(struct file *filp, unsigned long arg) |
| 1334 | { |
| 1335 | struct inode *inode = file_inode(filp); |
| 1336 | struct f2fs_inode_info *fi = F2FS_I(inode); |
| 1337 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; |
| 1338 | unsigned int oldflags; |
| 1339 | int ret; |
| 1340 | |
| 1341 | if (!inode_owner_or_capable(inode)) |
| 1342 | return -EACCES; |
| 1343 | |
| 1344 | if (get_user(flags, (int __user *)arg)) |
| 1345 | return -EFAULT; |
| 1346 | |
| 1347 | ret = mnt_want_write_file(filp); |
| 1348 | if (ret) |
| 1349 | return ret; |
| 1350 | |
| 1351 | flags = f2fs_mask_flags(inode->i_mode, flags); |
| 1352 | |
| 1353 | inode_lock(inode); |
| 1354 | |
| 1355 | oldflags = fi->i_flags; |
| 1356 | |
| 1357 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { |
| 1358 | if (!capable(CAP_LINUX_IMMUTABLE)) { |
| 1359 | inode_unlock(inode); |
| 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 | inode_unlock(inode); |
| 1369 | |
| 1370 | inode->i_ctime = CURRENT_TIME; |
| 1371 | f2fs_set_inode_flags(inode); |
| 1372 | out: |
| 1373 | mnt_drop_write_file(filp); |
| 1374 | return ret; |
| 1375 | } |
| 1376 | |
| 1377 | static int f2fs_ioc_getversion(struct file *filp, unsigned long arg) |
| 1378 | { |
| 1379 | struct inode *inode = file_inode(filp); |
| 1380 | |
| 1381 | return put_user(inode->i_generation, (int __user *)arg); |
| 1382 | } |
| 1383 | |
| 1384 | static int f2fs_ioc_start_atomic_write(struct file *filp) |
| 1385 | { |
| 1386 | struct inode *inode = file_inode(filp); |
| 1387 | int ret; |
| 1388 | |
| 1389 | if (!inode_owner_or_capable(inode)) |
| 1390 | return -EACCES; |
| 1391 | |
| 1392 | ret = mnt_want_write_file(filp); |
| 1393 | if (ret) |
| 1394 | return ret; |
| 1395 | |
| 1396 | inode_lock(inode); |
| 1397 | |
| 1398 | if (f2fs_is_atomic_file(inode)) |
| 1399 | goto out; |
| 1400 | |
| 1401 | ret = f2fs_convert_inline_inode(inode); |
| 1402 | if (ret) |
| 1403 | goto out; |
| 1404 | |
| 1405 | set_inode_flag(inode, FI_ATOMIC_FILE); |
| 1406 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1407 | |
| 1408 | if (!get_dirty_pages(inode)) |
| 1409 | goto out; |
| 1410 | |
| 1411 | f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING, |
| 1412 | "Unexpected flush for atomic writes: ino=%lu, npages=%lld", |
| 1413 | inode->i_ino, get_dirty_pages(inode)); |
| 1414 | ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); |
| 1415 | if (ret) |
| 1416 | clear_inode_flag(inode, FI_ATOMIC_FILE); |
| 1417 | out: |
| 1418 | inode_unlock(inode); |
| 1419 | mnt_drop_write_file(filp); |
| 1420 | return ret; |
| 1421 | } |
| 1422 | |
| 1423 | static int f2fs_ioc_commit_atomic_write(struct file *filp) |
| 1424 | { |
| 1425 | struct inode *inode = file_inode(filp); |
| 1426 | int ret; |
| 1427 | |
| 1428 | if (!inode_owner_or_capable(inode)) |
| 1429 | return -EACCES; |
| 1430 | |
| 1431 | ret = mnt_want_write_file(filp); |
| 1432 | if (ret) |
| 1433 | return ret; |
| 1434 | |
| 1435 | inode_lock(inode); |
| 1436 | |
| 1437 | if (f2fs_is_volatile_file(inode)) |
| 1438 | goto err_out; |
| 1439 | |
| 1440 | if (f2fs_is_atomic_file(inode)) { |
| 1441 | clear_inode_flag(inode, FI_ATOMIC_FILE); |
| 1442 | ret = commit_inmem_pages(inode); |
| 1443 | if (ret) { |
| 1444 | set_inode_flag(inode, FI_ATOMIC_FILE); |
| 1445 | goto err_out; |
| 1446 | } |
| 1447 | } |
| 1448 | |
| 1449 | ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true); |
| 1450 | err_out: |
| 1451 | inode_unlock(inode); |
| 1452 | mnt_drop_write_file(filp); |
| 1453 | return ret; |
| 1454 | } |
| 1455 | |
| 1456 | static int f2fs_ioc_start_volatile_write(struct file *filp) |
| 1457 | { |
| 1458 | struct inode *inode = file_inode(filp); |
| 1459 | int ret; |
| 1460 | |
| 1461 | if (!inode_owner_or_capable(inode)) |
| 1462 | return -EACCES; |
| 1463 | |
| 1464 | ret = mnt_want_write_file(filp); |
| 1465 | if (ret) |
| 1466 | return ret; |
| 1467 | |
| 1468 | inode_lock(inode); |
| 1469 | |
| 1470 | if (f2fs_is_volatile_file(inode)) |
| 1471 | goto out; |
| 1472 | |
| 1473 | ret = f2fs_convert_inline_inode(inode); |
| 1474 | if (ret) |
| 1475 | goto out; |
| 1476 | |
| 1477 | set_inode_flag(inode, FI_VOLATILE_FILE); |
| 1478 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1479 | out: |
| 1480 | inode_unlock(inode); |
| 1481 | mnt_drop_write_file(filp); |
| 1482 | return ret; |
| 1483 | } |
| 1484 | |
| 1485 | static int f2fs_ioc_release_volatile_write(struct file *filp) |
| 1486 | { |
| 1487 | struct inode *inode = file_inode(filp); |
| 1488 | int ret; |
| 1489 | |
| 1490 | if (!inode_owner_or_capable(inode)) |
| 1491 | return -EACCES; |
| 1492 | |
| 1493 | ret = mnt_want_write_file(filp); |
| 1494 | if (ret) |
| 1495 | return ret; |
| 1496 | |
| 1497 | inode_lock(inode); |
| 1498 | |
| 1499 | if (!f2fs_is_volatile_file(inode)) |
| 1500 | goto out; |
| 1501 | |
| 1502 | if (!f2fs_is_first_block_written(inode)) { |
| 1503 | ret = truncate_partial_data_page(inode, 0, true); |
| 1504 | goto out; |
| 1505 | } |
| 1506 | |
| 1507 | ret = punch_hole(inode, 0, F2FS_BLKSIZE); |
| 1508 | out: |
| 1509 | inode_unlock(inode); |
| 1510 | mnt_drop_write_file(filp); |
| 1511 | return ret; |
| 1512 | } |
| 1513 | |
| 1514 | static int f2fs_ioc_abort_volatile_write(struct file *filp) |
| 1515 | { |
| 1516 | struct inode *inode = file_inode(filp); |
| 1517 | int ret; |
| 1518 | |
| 1519 | if (!inode_owner_or_capable(inode)) |
| 1520 | return -EACCES; |
| 1521 | |
| 1522 | ret = mnt_want_write_file(filp); |
| 1523 | if (ret) |
| 1524 | return ret; |
| 1525 | |
| 1526 | inode_lock(inode); |
| 1527 | |
| 1528 | if (f2fs_is_atomic_file(inode)) |
| 1529 | drop_inmem_pages(inode); |
| 1530 | if (f2fs_is_volatile_file(inode)) { |
| 1531 | clear_inode_flag(inode, FI_VOLATILE_FILE); |
| 1532 | ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true); |
| 1533 | } |
| 1534 | |
| 1535 | inode_unlock(inode); |
| 1536 | |
| 1537 | mnt_drop_write_file(filp); |
| 1538 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1539 | return ret; |
| 1540 | } |
| 1541 | |
| 1542 | static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg) |
| 1543 | { |
| 1544 | struct inode *inode = file_inode(filp); |
| 1545 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1546 | struct super_block *sb = sbi->sb; |
| 1547 | __u32 in; |
| 1548 | int ret; |
| 1549 | |
| 1550 | if (!capable(CAP_SYS_ADMIN)) |
| 1551 | return -EPERM; |
| 1552 | |
| 1553 | if (get_user(in, (__u32 __user *)arg)) |
| 1554 | return -EFAULT; |
| 1555 | |
| 1556 | ret = mnt_want_write_file(filp); |
| 1557 | if (ret) |
| 1558 | return ret; |
| 1559 | |
| 1560 | switch (in) { |
| 1561 | case F2FS_GOING_DOWN_FULLSYNC: |
| 1562 | sb = freeze_bdev(sb->s_bdev); |
| 1563 | if (sb && !IS_ERR(sb)) { |
| 1564 | f2fs_stop_checkpoint(sbi, false); |
| 1565 | thaw_bdev(sb->s_bdev, sb); |
| 1566 | } |
| 1567 | break; |
| 1568 | case F2FS_GOING_DOWN_METASYNC: |
| 1569 | /* do checkpoint only */ |
| 1570 | f2fs_sync_fs(sb, 1); |
| 1571 | f2fs_stop_checkpoint(sbi, false); |
| 1572 | break; |
| 1573 | case F2FS_GOING_DOWN_NOSYNC: |
| 1574 | f2fs_stop_checkpoint(sbi, false); |
| 1575 | break; |
| 1576 | case F2FS_GOING_DOWN_METAFLUSH: |
| 1577 | sync_meta_pages(sbi, META, LONG_MAX); |
| 1578 | f2fs_stop_checkpoint(sbi, false); |
| 1579 | break; |
| 1580 | default: |
| 1581 | ret = -EINVAL; |
| 1582 | goto out; |
| 1583 | } |
| 1584 | f2fs_update_time(sbi, REQ_TIME); |
| 1585 | out: |
| 1586 | mnt_drop_write_file(filp); |
| 1587 | return ret; |
| 1588 | } |
| 1589 | |
| 1590 | static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg) |
| 1591 | { |
| 1592 | struct inode *inode = file_inode(filp); |
| 1593 | struct super_block *sb = inode->i_sb; |
| 1594 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
| 1595 | struct fstrim_range range; |
| 1596 | int ret; |
| 1597 | |
| 1598 | if (!capable(CAP_SYS_ADMIN)) |
| 1599 | return -EPERM; |
| 1600 | |
| 1601 | if (!blk_queue_discard(q)) |
| 1602 | return -EOPNOTSUPP; |
| 1603 | |
| 1604 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
| 1605 | sizeof(range))) |
| 1606 | return -EFAULT; |
| 1607 | |
| 1608 | ret = mnt_want_write_file(filp); |
| 1609 | if (ret) |
| 1610 | return ret; |
| 1611 | |
| 1612 | range.minlen = max((unsigned int)range.minlen, |
| 1613 | q->limits.discard_granularity); |
| 1614 | ret = f2fs_trim_fs(F2FS_SB(sb), &range); |
| 1615 | mnt_drop_write_file(filp); |
| 1616 | if (ret < 0) |
| 1617 | return ret; |
| 1618 | |
| 1619 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
| 1620 | sizeof(range))) |
| 1621 | return -EFAULT; |
| 1622 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1623 | return 0; |
| 1624 | } |
| 1625 | |
| 1626 | static bool uuid_is_nonzero(__u8 u[16]) |
| 1627 | { |
| 1628 | int i; |
| 1629 | |
| 1630 | for (i = 0; i < 16; i++) |
| 1631 | if (u[i]) |
| 1632 | return true; |
| 1633 | return false; |
| 1634 | } |
| 1635 | |
| 1636 | static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg) |
| 1637 | { |
| 1638 | struct fscrypt_policy policy; |
| 1639 | struct inode *inode = file_inode(filp); |
| 1640 | int ret; |
| 1641 | |
| 1642 | if (copy_from_user(&policy, (struct fscrypt_policy __user *)arg, |
| 1643 | sizeof(policy))) |
| 1644 | return -EFAULT; |
| 1645 | |
| 1646 | ret = mnt_want_write_file(filp); |
| 1647 | if (ret) |
| 1648 | return ret; |
| 1649 | |
| 1650 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1651 | ret = fscrypt_process_policy(inode, &policy); |
| 1652 | |
| 1653 | mnt_drop_write_file(filp); |
| 1654 | return ret; |
| 1655 | } |
| 1656 | |
| 1657 | static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg) |
| 1658 | { |
| 1659 | struct fscrypt_policy policy; |
| 1660 | struct inode *inode = file_inode(filp); |
| 1661 | int err; |
| 1662 | |
| 1663 | err = fscrypt_get_policy(inode, &policy); |
| 1664 | if (err) |
| 1665 | return err; |
| 1666 | |
| 1667 | if (copy_to_user((struct fscrypt_policy __user *)arg, &policy, sizeof(policy))) |
| 1668 | return -EFAULT; |
| 1669 | return 0; |
| 1670 | } |
| 1671 | |
| 1672 | static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg) |
| 1673 | { |
| 1674 | struct inode *inode = file_inode(filp); |
| 1675 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1676 | int err; |
| 1677 | |
| 1678 | if (!f2fs_sb_has_crypto(inode->i_sb)) |
| 1679 | return -EOPNOTSUPP; |
| 1680 | |
| 1681 | if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt)) |
| 1682 | goto got_it; |
| 1683 | |
| 1684 | err = mnt_want_write_file(filp); |
| 1685 | if (err) |
| 1686 | return err; |
| 1687 | |
| 1688 | /* update superblock with uuid */ |
| 1689 | generate_random_uuid(sbi->raw_super->encrypt_pw_salt); |
| 1690 | |
| 1691 | err = f2fs_commit_super(sbi, false); |
| 1692 | if (err) { |
| 1693 | /* undo new data */ |
| 1694 | memset(sbi->raw_super->encrypt_pw_salt, 0, 16); |
| 1695 | mnt_drop_write_file(filp); |
| 1696 | return err; |
| 1697 | } |
| 1698 | mnt_drop_write_file(filp); |
| 1699 | got_it: |
| 1700 | if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt, |
| 1701 | 16)) |
| 1702 | return -EFAULT; |
| 1703 | return 0; |
| 1704 | } |
| 1705 | |
| 1706 | static int f2fs_ioc_gc(struct file *filp, unsigned long arg) |
| 1707 | { |
| 1708 | struct inode *inode = file_inode(filp); |
| 1709 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1710 | __u32 sync; |
| 1711 | int ret; |
| 1712 | |
| 1713 | if (!capable(CAP_SYS_ADMIN)) |
| 1714 | return -EPERM; |
| 1715 | |
| 1716 | if (get_user(sync, (__u32 __user *)arg)) |
| 1717 | return -EFAULT; |
| 1718 | |
| 1719 | if (f2fs_readonly(sbi->sb)) |
| 1720 | return -EROFS; |
| 1721 | |
| 1722 | ret = mnt_want_write_file(filp); |
| 1723 | if (ret) |
| 1724 | return ret; |
| 1725 | |
| 1726 | if (!sync) { |
| 1727 | if (!mutex_trylock(&sbi->gc_mutex)) { |
| 1728 | ret = -EBUSY; |
| 1729 | goto out; |
| 1730 | } |
| 1731 | } else { |
| 1732 | mutex_lock(&sbi->gc_mutex); |
| 1733 | } |
| 1734 | |
| 1735 | ret = f2fs_gc(sbi, sync); |
| 1736 | out: |
| 1737 | mnt_drop_write_file(filp); |
| 1738 | return ret; |
| 1739 | } |
| 1740 | |
| 1741 | static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg) |
| 1742 | { |
| 1743 | struct inode *inode = file_inode(filp); |
| 1744 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1745 | int ret; |
| 1746 | |
| 1747 | if (!capable(CAP_SYS_ADMIN)) |
| 1748 | return -EPERM; |
| 1749 | |
| 1750 | if (f2fs_readonly(sbi->sb)) |
| 1751 | return -EROFS; |
| 1752 | |
| 1753 | ret = mnt_want_write_file(filp); |
| 1754 | if (ret) |
| 1755 | return ret; |
| 1756 | |
| 1757 | ret = f2fs_sync_fs(sbi->sb, 1); |
| 1758 | |
| 1759 | mnt_drop_write_file(filp); |
| 1760 | return ret; |
| 1761 | } |
| 1762 | |
| 1763 | static int f2fs_defragment_range(struct f2fs_sb_info *sbi, |
| 1764 | struct file *filp, |
| 1765 | struct f2fs_defragment *range) |
| 1766 | { |
| 1767 | struct inode *inode = file_inode(filp); |
| 1768 | struct f2fs_map_blocks map = { .m_next_pgofs = NULL }; |
| 1769 | struct extent_info ei; |
| 1770 | pgoff_t pg_start, pg_end; |
| 1771 | unsigned int blk_per_seg = sbi->blocks_per_seg; |
| 1772 | unsigned int total = 0, sec_num; |
| 1773 | unsigned int pages_per_sec = sbi->segs_per_sec * blk_per_seg; |
| 1774 | block_t blk_end = 0; |
| 1775 | bool fragmented = false; |
| 1776 | int err; |
| 1777 | |
| 1778 | /* if in-place-update policy is enabled, don't waste time here */ |
| 1779 | if (need_inplace_update(inode)) |
| 1780 | return -EINVAL; |
| 1781 | |
| 1782 | pg_start = range->start >> PAGE_SHIFT; |
| 1783 | pg_end = (range->start + range->len) >> PAGE_SHIFT; |
| 1784 | |
| 1785 | f2fs_balance_fs(sbi, true); |
| 1786 | |
| 1787 | inode_lock(inode); |
| 1788 | |
| 1789 | /* writeback all dirty pages in the range */ |
| 1790 | err = filemap_write_and_wait_range(inode->i_mapping, range->start, |
| 1791 | range->start + range->len - 1); |
| 1792 | if (err) |
| 1793 | goto out; |
| 1794 | |
| 1795 | /* |
| 1796 | * lookup mapping info in extent cache, skip defragmenting if physical |
| 1797 | * block addresses are continuous. |
| 1798 | */ |
| 1799 | if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) { |
| 1800 | if (ei.fofs + ei.len >= pg_end) |
| 1801 | goto out; |
| 1802 | } |
| 1803 | |
| 1804 | map.m_lblk = pg_start; |
| 1805 | |
| 1806 | /* |
| 1807 | * lookup mapping info in dnode page cache, skip defragmenting if all |
| 1808 | * physical block addresses are continuous even if there are hole(s) |
| 1809 | * in logical blocks. |
| 1810 | */ |
| 1811 | while (map.m_lblk < pg_end) { |
| 1812 | map.m_len = pg_end - map.m_lblk; |
| 1813 | err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ); |
| 1814 | if (err) |
| 1815 | goto out; |
| 1816 | |
| 1817 | if (!(map.m_flags & F2FS_MAP_FLAGS)) { |
| 1818 | map.m_lblk++; |
| 1819 | continue; |
| 1820 | } |
| 1821 | |
| 1822 | if (blk_end && blk_end != map.m_pblk) { |
| 1823 | fragmented = true; |
| 1824 | break; |
| 1825 | } |
| 1826 | blk_end = map.m_pblk + map.m_len; |
| 1827 | |
| 1828 | map.m_lblk += map.m_len; |
| 1829 | } |
| 1830 | |
| 1831 | if (!fragmented) |
| 1832 | goto out; |
| 1833 | |
| 1834 | map.m_lblk = pg_start; |
| 1835 | map.m_len = pg_end - pg_start; |
| 1836 | |
| 1837 | sec_num = (map.m_len + pages_per_sec - 1) / pages_per_sec; |
| 1838 | |
| 1839 | /* |
| 1840 | * make sure there are enough free section for LFS allocation, this can |
| 1841 | * avoid defragment running in SSR mode when free section are allocated |
| 1842 | * intensively |
| 1843 | */ |
| 1844 | if (has_not_enough_free_secs(sbi, sec_num)) { |
| 1845 | err = -EAGAIN; |
| 1846 | goto out; |
| 1847 | } |
| 1848 | |
| 1849 | while (map.m_lblk < pg_end) { |
| 1850 | pgoff_t idx; |
| 1851 | int cnt = 0; |
| 1852 | |
| 1853 | do_map: |
| 1854 | map.m_len = pg_end - map.m_lblk; |
| 1855 | err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ); |
| 1856 | if (err) |
| 1857 | goto clear_out; |
| 1858 | |
| 1859 | if (!(map.m_flags & F2FS_MAP_FLAGS)) { |
| 1860 | map.m_lblk++; |
| 1861 | continue; |
| 1862 | } |
| 1863 | |
| 1864 | set_inode_flag(inode, FI_DO_DEFRAG); |
| 1865 | |
| 1866 | idx = map.m_lblk; |
| 1867 | while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) { |
| 1868 | struct page *page; |
| 1869 | |
| 1870 | page = get_lock_data_page(inode, idx, true); |
| 1871 | if (IS_ERR(page)) { |
| 1872 | err = PTR_ERR(page); |
| 1873 | goto clear_out; |
| 1874 | } |
| 1875 | |
| 1876 | set_page_dirty(page); |
| 1877 | f2fs_put_page(page, 1); |
| 1878 | |
| 1879 | idx++; |
| 1880 | cnt++; |
| 1881 | total++; |
| 1882 | } |
| 1883 | |
| 1884 | map.m_lblk = idx; |
| 1885 | |
| 1886 | if (idx < pg_end && cnt < blk_per_seg) |
| 1887 | goto do_map; |
| 1888 | |
| 1889 | clear_inode_flag(inode, FI_DO_DEFRAG); |
| 1890 | |
| 1891 | err = filemap_fdatawrite(inode->i_mapping); |
| 1892 | if (err) |
| 1893 | goto out; |
| 1894 | } |
| 1895 | clear_out: |
| 1896 | clear_inode_flag(inode, FI_DO_DEFRAG); |
| 1897 | out: |
| 1898 | inode_unlock(inode); |
| 1899 | if (!err) |
| 1900 | range->len = (u64)total << PAGE_SHIFT; |
| 1901 | return err; |
| 1902 | } |
| 1903 | |
| 1904 | static int f2fs_ioc_defragment(struct file *filp, unsigned long arg) |
| 1905 | { |
| 1906 | struct inode *inode = file_inode(filp); |
| 1907 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1908 | struct f2fs_defragment range; |
| 1909 | int err; |
| 1910 | |
| 1911 | if (!capable(CAP_SYS_ADMIN)) |
| 1912 | return -EPERM; |
| 1913 | |
| 1914 | if (!S_ISREG(inode->i_mode)) |
| 1915 | return -EINVAL; |
| 1916 | |
| 1917 | err = mnt_want_write_file(filp); |
| 1918 | if (err) |
| 1919 | return err; |
| 1920 | |
| 1921 | if (f2fs_readonly(sbi->sb)) { |
| 1922 | err = -EROFS; |
| 1923 | goto out; |
| 1924 | } |
| 1925 | |
| 1926 | if (copy_from_user(&range, (struct f2fs_defragment __user *)arg, |
| 1927 | sizeof(range))) { |
| 1928 | err = -EFAULT; |
| 1929 | goto out; |
| 1930 | } |
| 1931 | |
| 1932 | /* verify alignment of offset & size */ |
| 1933 | if (range.start & (F2FS_BLKSIZE - 1) || |
| 1934 | range.len & (F2FS_BLKSIZE - 1)) { |
| 1935 | err = -EINVAL; |
| 1936 | goto out; |
| 1937 | } |
| 1938 | |
| 1939 | err = f2fs_defragment_range(sbi, filp, &range); |
| 1940 | f2fs_update_time(sbi, REQ_TIME); |
| 1941 | if (err < 0) |
| 1942 | goto out; |
| 1943 | |
| 1944 | if (copy_to_user((struct f2fs_defragment __user *)arg, &range, |
| 1945 | sizeof(range))) |
| 1946 | err = -EFAULT; |
| 1947 | out: |
| 1948 | mnt_drop_write_file(filp); |
| 1949 | return err; |
| 1950 | } |
| 1951 | |
| 1952 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 1953 | { |
| 1954 | switch (cmd) { |
| 1955 | case F2FS_IOC_GETFLAGS: |
| 1956 | return f2fs_ioc_getflags(filp, arg); |
| 1957 | case F2FS_IOC_SETFLAGS: |
| 1958 | return f2fs_ioc_setflags(filp, arg); |
| 1959 | case F2FS_IOC_GETVERSION: |
| 1960 | return f2fs_ioc_getversion(filp, arg); |
| 1961 | case F2FS_IOC_START_ATOMIC_WRITE: |
| 1962 | return f2fs_ioc_start_atomic_write(filp); |
| 1963 | case F2FS_IOC_COMMIT_ATOMIC_WRITE: |
| 1964 | return f2fs_ioc_commit_atomic_write(filp); |
| 1965 | case F2FS_IOC_START_VOLATILE_WRITE: |
| 1966 | return f2fs_ioc_start_volatile_write(filp); |
| 1967 | case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
| 1968 | return f2fs_ioc_release_volatile_write(filp); |
| 1969 | case F2FS_IOC_ABORT_VOLATILE_WRITE: |
| 1970 | return f2fs_ioc_abort_volatile_write(filp); |
| 1971 | case F2FS_IOC_SHUTDOWN: |
| 1972 | return f2fs_ioc_shutdown(filp, arg); |
| 1973 | case FITRIM: |
| 1974 | return f2fs_ioc_fitrim(filp, arg); |
| 1975 | case F2FS_IOC_SET_ENCRYPTION_POLICY: |
| 1976 | return f2fs_ioc_set_encryption_policy(filp, arg); |
| 1977 | case F2FS_IOC_GET_ENCRYPTION_POLICY: |
| 1978 | return f2fs_ioc_get_encryption_policy(filp, arg); |
| 1979 | case F2FS_IOC_GET_ENCRYPTION_PWSALT: |
| 1980 | return f2fs_ioc_get_encryption_pwsalt(filp, arg); |
| 1981 | case F2FS_IOC_GARBAGE_COLLECT: |
| 1982 | return f2fs_ioc_gc(filp, arg); |
| 1983 | case F2FS_IOC_WRITE_CHECKPOINT: |
| 1984 | return f2fs_ioc_write_checkpoint(filp, arg); |
| 1985 | case F2FS_IOC_DEFRAGMENT: |
| 1986 | return f2fs_ioc_defragment(filp, arg); |
| 1987 | default: |
| 1988 | return -ENOTTY; |
| 1989 | } |
| 1990 | } |
| 1991 | |
| 1992 | static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) |
| 1993 | { |
| 1994 | struct file *file = iocb->ki_filp; |
| 1995 | struct inode *inode = file_inode(file); |
| 1996 | ssize_t ret; |
| 1997 | |
| 1998 | if (f2fs_encrypted_inode(inode) && |
| 1999 | !fscrypt_has_encryption_key(inode) && |
| 2000 | fscrypt_get_encryption_info(inode)) |
| 2001 | return -EACCES; |
| 2002 | |
| 2003 | inode_lock(inode); |
| 2004 | ret = generic_write_checks(iocb, from); |
| 2005 | if (ret > 0) { |
| 2006 | ret = f2fs_preallocate_blocks(iocb, from); |
| 2007 | if (!ret) |
| 2008 | ret = __generic_file_write_iter(iocb, from); |
| 2009 | } |
| 2010 | inode_unlock(inode); |
| 2011 | |
| 2012 | if (ret > 0) |
| 2013 | ret = generic_write_sync(iocb, ret); |
| 2014 | return ret; |
| 2015 | } |
| 2016 | |
| 2017 | #ifdef CONFIG_COMPAT |
| 2018 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 2019 | { |
| 2020 | switch (cmd) { |
| 2021 | case F2FS_IOC32_GETFLAGS: |
| 2022 | cmd = F2FS_IOC_GETFLAGS; |
| 2023 | break; |
| 2024 | case F2FS_IOC32_SETFLAGS: |
| 2025 | cmd = F2FS_IOC_SETFLAGS; |
| 2026 | break; |
| 2027 | case F2FS_IOC32_GETVERSION: |
| 2028 | cmd = F2FS_IOC_GETVERSION; |
| 2029 | break; |
| 2030 | case F2FS_IOC_START_ATOMIC_WRITE: |
| 2031 | case F2FS_IOC_COMMIT_ATOMIC_WRITE: |
| 2032 | case F2FS_IOC_START_VOLATILE_WRITE: |
| 2033 | case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
| 2034 | case F2FS_IOC_ABORT_VOLATILE_WRITE: |
| 2035 | case F2FS_IOC_SHUTDOWN: |
| 2036 | case F2FS_IOC_SET_ENCRYPTION_POLICY: |
| 2037 | case F2FS_IOC_GET_ENCRYPTION_PWSALT: |
| 2038 | case F2FS_IOC_GET_ENCRYPTION_POLICY: |
| 2039 | case F2FS_IOC_GARBAGE_COLLECT: |
| 2040 | case F2FS_IOC_WRITE_CHECKPOINT: |
| 2041 | case F2FS_IOC_DEFRAGMENT: |
| 2042 | break; |
| 2043 | default: |
| 2044 | return -ENOIOCTLCMD; |
| 2045 | } |
| 2046 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
| 2047 | } |
| 2048 | #endif |
| 2049 | |
| 2050 | const struct file_operations f2fs_file_operations = { |
| 2051 | .llseek = f2fs_llseek, |
| 2052 | .read_iter = generic_file_read_iter, |
| 2053 | .write_iter = f2fs_file_write_iter, |
| 2054 | .open = f2fs_file_open, |
| 2055 | .release = f2fs_release_file, |
| 2056 | .mmap = f2fs_file_mmap, |
| 2057 | .fsync = f2fs_sync_file, |
| 2058 | .fallocate = f2fs_fallocate, |
| 2059 | .unlocked_ioctl = f2fs_ioctl, |
| 2060 | #ifdef CONFIG_COMPAT |
| 2061 | .compat_ioctl = f2fs_compat_ioctl, |
| 2062 | #endif |
| 2063 | .splice_read = generic_file_splice_read, |
| 2064 | .splice_write = iter_file_splice_write, |
| 2065 | }; |