| 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 | #include <linux/file.h> |
| 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 | |
| 44 | sb_start_pagefault(inode->i_sb); |
| 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 | |
| 59 | f2fs_balance_fs(sbi, dn.node_changed); |
| 60 | |
| 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_SHIFT) > |
| 79 | i_size_read(inode)) { |
| 80 | unsigned offset; |
| 81 | offset = i_size_read(inode) & ~PAGE_MASK; |
| 82 | zero_user_segment(page, offset, PAGE_SIZE); |
| 83 | } |
| 84 | set_page_dirty(page); |
| 85 | if (!PageUptodate(page)) |
| 86 | SetPageUptodate(page); |
| 87 | |
| 88 | trace_f2fs_vm_page_mkwrite(page, DATA); |
| 89 | mapped: |
| 90 | /* fill the page */ |
| 91 | f2fs_wait_on_page_writeback(page, DATA, false); |
| 92 | |
| 93 | /* wait for GCed encrypted page writeback */ |
| 94 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
| 95 | f2fs_wait_on_encrypted_page_writeback(sbi, dn.data_blkaddr); |
| 96 | |
| 97 | /* if gced page is attached, don't write to cold segment */ |
| 98 | clear_cold_data(page); |
| 99 | out: |
| 100 | sb_end_pagefault(inode->i_sb); |
| 101 | f2fs_update_time(sbi, REQ_TIME); |
| 102 | return block_page_mkwrite_return(err); |
| 103 | } |
| 104 | |
| 105 | static const struct vm_operations_struct f2fs_file_vm_ops = { |
| 106 | .fault = filemap_fault, |
| 107 | .map_pages = filemap_map_pages, |
| 108 | .page_mkwrite = f2fs_vm_page_mkwrite, |
| 109 | }; |
| 110 | |
| 111 | static int get_parent_ino(struct inode *inode, nid_t *pino) |
| 112 | { |
| 113 | struct dentry *dentry; |
| 114 | |
| 115 | inode = igrab(inode); |
| 116 | dentry = d_find_any_alias(inode); |
| 117 | iput(inode); |
| 118 | if (!dentry) |
| 119 | return 0; |
| 120 | |
| 121 | if (update_dent_inode(inode, inode, &dentry->d_name)) { |
| 122 | dput(dentry); |
| 123 | return 0; |
| 124 | } |
| 125 | |
| 126 | *pino = parent_ino(dentry); |
| 127 | dput(dentry); |
| 128 | return 1; |
| 129 | } |
| 130 | |
| 131 | static inline bool need_do_checkpoint(struct inode *inode) |
| 132 | { |
| 133 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 134 | bool need_cp = false; |
| 135 | |
| 136 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
| 137 | need_cp = true; |
| 138 | else if (is_sbi_flag_set(sbi, SBI_NEED_CP)) |
| 139 | need_cp = true; |
| 140 | else if (file_enc_name(inode) && need_dentry_mark(sbi, inode->i_ino)) |
| 141 | need_cp = true; |
| 142 | else if (file_wrong_pino(inode)) |
| 143 | need_cp = true; |
| 144 | else if (!space_for_roll_forward(sbi)) |
| 145 | need_cp = true; |
| 146 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
| 147 | need_cp = true; |
| 148 | else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi))) |
| 149 | need_cp = true; |
| 150 | else if (test_opt(sbi, FASTBOOT)) |
| 151 | need_cp = true; |
| 152 | else if (sbi->active_logs == 2) |
| 153 | need_cp = true; |
| 154 | |
| 155 | return need_cp; |
| 156 | } |
| 157 | |
| 158 | static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino) |
| 159 | { |
| 160 | struct page *i = find_get_page(NODE_MAPPING(sbi), ino); |
| 161 | bool ret = false; |
| 162 | /* But we need to avoid that there are some inode updates */ |
| 163 | if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) |
| 164 | ret = true; |
| 165 | f2fs_put_page(i, 0); |
| 166 | return ret; |
| 167 | } |
| 168 | |
| 169 | static void try_to_fix_pino(struct inode *inode) |
| 170 | { |
| 171 | struct f2fs_inode_info *fi = F2FS_I(inode); |
| 172 | nid_t pino; |
| 173 | |
| 174 | down_write(&fi->i_sem); |
| 175 | fi->xattr_ver = 0; |
| 176 | if (file_wrong_pino(inode) && inode->i_nlink == 1 && |
| 177 | get_parent_ino(inode, &pino)) { |
| 178 | f2fs_i_pino_write(inode, pino); |
| 179 | file_got_pino(inode); |
| 180 | } |
| 181 | up_write(&fi->i_sem); |
| 182 | } |
| 183 | |
| 184 | static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end, |
| 185 | int datasync, bool atomic) |
| 186 | { |
| 187 | struct inode *inode = file->f_mapping->host; |
| 188 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 189 | nid_t ino = inode->i_ino; |
| 190 | int ret = 0; |
| 191 | bool need_cp = false; |
| 192 | struct writeback_control wbc = { |
| 193 | .sync_mode = WB_SYNC_ALL, |
| 194 | .nr_to_write = LONG_MAX, |
| 195 | .for_reclaim = 0, |
| 196 | }; |
| 197 | |
| 198 | if (unlikely(f2fs_readonly(inode->i_sb))) |
| 199 | return 0; |
| 200 | |
| 201 | trace_f2fs_sync_file_enter(inode); |
| 202 | |
| 203 | /* if fdatasync is triggered, let's do in-place-update */ |
| 204 | if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks) |
| 205 | set_inode_flag(inode, FI_NEED_IPU); |
| 206 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
| 207 | clear_inode_flag(inode, FI_NEED_IPU); |
| 208 | |
| 209 | if (ret) { |
| 210 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
| 211 | return ret; |
| 212 | } |
| 213 | |
| 214 | /* if the inode is dirty, let's recover all the time */ |
| 215 | if (!datasync && !f2fs_skip_inode_update(inode)) { |
| 216 | f2fs_write_inode(inode, NULL); |
| 217 | goto go_write; |
| 218 | } |
| 219 | |
| 220 | /* |
| 221 | * if there is no written data, don't waste time to write recovery info. |
| 222 | */ |
| 223 | if (!is_inode_flag_set(inode, FI_APPEND_WRITE) && |
| 224 | !exist_written_data(sbi, ino, APPEND_INO)) { |
| 225 | |
| 226 | /* it may call write_inode just prior to fsync */ |
| 227 | if (need_inode_page_update(sbi, ino)) |
| 228 | goto go_write; |
| 229 | |
| 230 | if (is_inode_flag_set(inode, FI_UPDATE_WRITE) || |
| 231 | exist_written_data(sbi, ino, UPDATE_INO)) |
| 232 | goto flush_out; |
| 233 | goto out; |
| 234 | } |
| 235 | go_write: |
| 236 | /* |
| 237 | * Both of fdatasync() and fsync() are able to be recovered from |
| 238 | * sudden-power-off. |
| 239 | */ |
| 240 | down_read(&F2FS_I(inode)->i_sem); |
| 241 | need_cp = need_do_checkpoint(inode); |
| 242 | up_read(&F2FS_I(inode)->i_sem); |
| 243 | |
| 244 | if (need_cp) { |
| 245 | /* all the dirty node pages should be flushed for POR */ |
| 246 | ret = f2fs_sync_fs(inode->i_sb, 1); |
| 247 | |
| 248 | /* |
| 249 | * We've secured consistency through sync_fs. Following pino |
| 250 | * will be used only for fsynced inodes after checkpoint. |
| 251 | */ |
| 252 | try_to_fix_pino(inode); |
| 253 | clear_inode_flag(inode, FI_APPEND_WRITE); |
| 254 | clear_inode_flag(inode, FI_UPDATE_WRITE); |
| 255 | goto out; |
| 256 | } |
| 257 | sync_nodes: |
| 258 | ret = fsync_node_pages(sbi, inode, &wbc, atomic); |
| 259 | if (ret) |
| 260 | goto out; |
| 261 | |
| 262 | /* if cp_error was enabled, we should avoid infinite loop */ |
| 263 | if (unlikely(f2fs_cp_error(sbi))) { |
| 264 | ret = -EIO; |
| 265 | goto out; |
| 266 | } |
| 267 | |
| 268 | if (need_inode_block_update(sbi, ino)) { |
| 269 | f2fs_mark_inode_dirty_sync(inode); |
| 270 | f2fs_write_inode(inode, NULL); |
| 271 | goto sync_nodes; |
| 272 | } |
| 273 | |
| 274 | ret = wait_on_node_pages_writeback(sbi, ino); |
| 275 | if (ret) |
| 276 | goto out; |
| 277 | |
| 278 | /* once recovery info is written, don't need to tack this */ |
| 279 | remove_ino_entry(sbi, ino, APPEND_INO); |
| 280 | clear_inode_flag(inode, FI_APPEND_WRITE); |
| 281 | flush_out: |
| 282 | remove_ino_entry(sbi, ino, UPDATE_INO); |
| 283 | clear_inode_flag(inode, FI_UPDATE_WRITE); |
| 284 | ret = f2fs_issue_flush(sbi); |
| 285 | f2fs_update_time(sbi, REQ_TIME); |
| 286 | out: |
| 287 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
| 288 | f2fs_trace_ios(NULL, 1); |
| 289 | return ret; |
| 290 | } |
| 291 | |
| 292 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
| 293 | { |
| 294 | return f2fs_do_sync_file(file, start, end, datasync, false); |
| 295 | } |
| 296 | |
| 297 | static pgoff_t __get_first_dirty_index(struct address_space *mapping, |
| 298 | pgoff_t pgofs, int whence) |
| 299 | { |
| 300 | struct pagevec pvec; |
| 301 | int nr_pages; |
| 302 | |
| 303 | if (whence != SEEK_DATA) |
| 304 | return 0; |
| 305 | |
| 306 | /* find first dirty page index */ |
| 307 | pagevec_init(&pvec, 0); |
| 308 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs, |
| 309 | PAGECACHE_TAG_DIRTY, 1); |
| 310 | pgofs = nr_pages ? pvec.pages[0]->index : ULONG_MAX; |
| 311 | pagevec_release(&pvec); |
| 312 | return pgofs; |
| 313 | } |
| 314 | |
| 315 | static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs, |
| 316 | int whence) |
| 317 | { |
| 318 | switch (whence) { |
| 319 | case SEEK_DATA: |
| 320 | if ((blkaddr == NEW_ADDR && dirty == pgofs) || |
| 321 | (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR)) |
| 322 | return true; |
| 323 | break; |
| 324 | case SEEK_HOLE: |
| 325 | if (blkaddr == NULL_ADDR) |
| 326 | return true; |
| 327 | break; |
| 328 | } |
| 329 | return false; |
| 330 | } |
| 331 | |
| 332 | static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) |
| 333 | { |
| 334 | struct inode *inode = file->f_mapping->host; |
| 335 | loff_t maxbytes = inode->i_sb->s_maxbytes; |
| 336 | struct dnode_of_data dn; |
| 337 | pgoff_t pgofs, end_offset, dirty; |
| 338 | loff_t data_ofs = offset; |
| 339 | loff_t isize; |
| 340 | int err = 0; |
| 341 | |
| 342 | inode_lock(inode); |
| 343 | |
| 344 | isize = i_size_read(inode); |
| 345 | if (offset >= isize) |
| 346 | goto fail; |
| 347 | |
| 348 | /* handle inline data case */ |
| 349 | if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) { |
| 350 | if (whence == SEEK_HOLE) |
| 351 | data_ofs = isize; |
| 352 | goto found; |
| 353 | } |
| 354 | |
| 355 | pgofs = (pgoff_t)(offset >> PAGE_SHIFT); |
| 356 | |
| 357 | dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence); |
| 358 | |
| 359 | for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) { |
| 360 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 361 | err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE); |
| 362 | if (err && err != -ENOENT) { |
| 363 | goto fail; |
| 364 | } else if (err == -ENOENT) { |
| 365 | /* direct node does not exists */ |
| 366 | if (whence == SEEK_DATA) { |
| 367 | pgofs = get_next_page_offset(&dn, pgofs); |
| 368 | continue; |
| 369 | } else { |
| 370 | goto found; |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
| 375 | |
| 376 | /* find data/hole in dnode block */ |
| 377 | for (; dn.ofs_in_node < end_offset; |
| 378 | dn.ofs_in_node++, pgofs++, |
| 379 | data_ofs = (loff_t)pgofs << PAGE_SHIFT) { |
| 380 | block_t blkaddr; |
| 381 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
| 382 | |
| 383 | if (__found_offset(blkaddr, dirty, pgofs, whence)) { |
| 384 | f2fs_put_dnode(&dn); |
| 385 | goto found; |
| 386 | } |
| 387 | } |
| 388 | f2fs_put_dnode(&dn); |
| 389 | } |
| 390 | |
| 391 | if (whence == SEEK_DATA) |
| 392 | goto fail; |
| 393 | found: |
| 394 | if (whence == SEEK_HOLE && data_ofs > isize) |
| 395 | data_ofs = isize; |
| 396 | inode_unlock(inode); |
| 397 | return vfs_setpos(file, data_ofs, maxbytes); |
| 398 | fail: |
| 399 | inode_unlock(inode); |
| 400 | return -ENXIO; |
| 401 | } |
| 402 | |
| 403 | static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence) |
| 404 | { |
| 405 | struct inode *inode = file->f_mapping->host; |
| 406 | loff_t maxbytes = inode->i_sb->s_maxbytes; |
| 407 | |
| 408 | switch (whence) { |
| 409 | case SEEK_SET: |
| 410 | case SEEK_CUR: |
| 411 | case SEEK_END: |
| 412 | return generic_file_llseek_size(file, offset, whence, |
| 413 | maxbytes, i_size_read(inode)); |
| 414 | case SEEK_DATA: |
| 415 | case SEEK_HOLE: |
| 416 | if (offset < 0) |
| 417 | return -ENXIO; |
| 418 | return f2fs_seek_block(file, offset, whence); |
| 419 | } |
| 420 | |
| 421 | return -EINVAL; |
| 422 | } |
| 423 | |
| 424 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) |
| 425 | { |
| 426 | struct inode *inode = file_inode(file); |
| 427 | int err; |
| 428 | |
| 429 | if (f2fs_encrypted_inode(inode)) { |
| 430 | err = fscrypt_get_encryption_info(inode); |
| 431 | if (err) |
| 432 | return 0; |
| 433 | if (!f2fs_encrypted_inode(inode)) |
| 434 | return -ENOKEY; |
| 435 | } |
| 436 | |
| 437 | /* we don't need to use inline_data strictly */ |
| 438 | err = f2fs_convert_inline_inode(inode); |
| 439 | if (err) |
| 440 | return err; |
| 441 | |
| 442 | file_accessed(file); |
| 443 | vma->vm_ops = &f2fs_file_vm_ops; |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | static int f2fs_file_open(struct inode *inode, struct file *filp) |
| 448 | { |
| 449 | int ret = generic_file_open(inode, filp); |
| 450 | struct dentry *dir; |
| 451 | |
| 452 | if (!ret && f2fs_encrypted_inode(inode)) { |
| 453 | ret = fscrypt_get_encryption_info(inode); |
| 454 | if (ret) |
| 455 | return -EACCES; |
| 456 | if (!fscrypt_has_encryption_key(inode)) |
| 457 | return -ENOKEY; |
| 458 | } |
| 459 | dir = dget_parent(file_dentry(filp)); |
| 460 | if (f2fs_encrypted_inode(d_inode(dir)) && |
| 461 | !fscrypt_has_permitted_context(d_inode(dir), inode)) { |
| 462 | dput(dir); |
| 463 | return -EPERM; |
| 464 | } |
| 465 | dput(dir); |
| 466 | return ret; |
| 467 | } |
| 468 | |
| 469 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
| 470 | { |
| 471 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
| 472 | struct f2fs_node *raw_node; |
| 473 | int nr_free = 0, ofs = dn->ofs_in_node, len = count; |
| 474 | __le32 *addr; |
| 475 | |
| 476 | raw_node = F2FS_NODE(dn->node_page); |
| 477 | addr = blkaddr_in_node(raw_node) + ofs; |
| 478 | |
| 479 | for (; count > 0; count--, addr++, dn->ofs_in_node++) { |
| 480 | block_t blkaddr = le32_to_cpu(*addr); |
| 481 | if (blkaddr == NULL_ADDR) |
| 482 | continue; |
| 483 | |
| 484 | dn->data_blkaddr = NULL_ADDR; |
| 485 | set_data_blkaddr(dn); |
| 486 | invalidate_blocks(sbi, blkaddr); |
| 487 | if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page)) |
| 488 | clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN); |
| 489 | nr_free++; |
| 490 | } |
| 491 | |
| 492 | if (nr_free) { |
| 493 | pgoff_t fofs; |
| 494 | /* |
| 495 | * once we invalidate valid blkaddr in range [ofs, ofs + count], |
| 496 | * we will invalidate all blkaddr in the whole range. |
| 497 | */ |
| 498 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), |
| 499 | dn->inode) + ofs; |
| 500 | f2fs_update_extent_cache_range(dn, fofs, 0, len); |
| 501 | dec_valid_block_count(sbi, dn->inode, nr_free); |
| 502 | } |
| 503 | dn->ofs_in_node = ofs; |
| 504 | |
| 505 | f2fs_update_time(sbi, REQ_TIME); |
| 506 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, |
| 507 | dn->ofs_in_node, nr_free); |
| 508 | return nr_free; |
| 509 | } |
| 510 | |
| 511 | void truncate_data_blocks(struct dnode_of_data *dn) |
| 512 | { |
| 513 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); |
| 514 | } |
| 515 | |
| 516 | static int truncate_partial_data_page(struct inode *inode, u64 from, |
| 517 | bool cache_only) |
| 518 | { |
| 519 | unsigned offset = from & (PAGE_SIZE - 1); |
| 520 | pgoff_t index = from >> PAGE_SHIFT; |
| 521 | struct address_space *mapping = inode->i_mapping; |
| 522 | struct page *page; |
| 523 | |
| 524 | if (!offset && !cache_only) |
| 525 | return 0; |
| 526 | |
| 527 | if (cache_only) { |
| 528 | page = f2fs_grab_cache_page(mapping, index, false); |
| 529 | if (page && PageUptodate(page)) |
| 530 | goto truncate_out; |
| 531 | f2fs_put_page(page, 1); |
| 532 | return 0; |
| 533 | } |
| 534 | |
| 535 | page = get_lock_data_page(inode, index, true); |
| 536 | if (IS_ERR(page)) |
| 537 | return 0; |
| 538 | truncate_out: |
| 539 | f2fs_wait_on_page_writeback(page, DATA, true); |
| 540 | zero_user(page, offset, PAGE_SIZE - offset); |
| 541 | if (!cache_only || !f2fs_encrypted_inode(inode) || |
| 542 | !S_ISREG(inode->i_mode)) |
| 543 | set_page_dirty(page); |
| 544 | f2fs_put_page(page, 1); |
| 545 | return 0; |
| 546 | } |
| 547 | |
| 548 | int truncate_blocks(struct inode *inode, u64 from, bool lock) |
| 549 | { |
| 550 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 551 | unsigned int blocksize = inode->i_sb->s_blocksize; |
| 552 | struct dnode_of_data dn; |
| 553 | pgoff_t free_from; |
| 554 | int count = 0, err = 0; |
| 555 | struct page *ipage; |
| 556 | bool truncate_page = false; |
| 557 | |
| 558 | trace_f2fs_truncate_blocks_enter(inode, from); |
| 559 | |
| 560 | free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1); |
| 561 | |
| 562 | if (free_from >= sbi->max_file_blocks) |
| 563 | goto free_partial; |
| 564 | |
| 565 | if (lock) |
| 566 | f2fs_lock_op(sbi); |
| 567 | |
| 568 | ipage = get_node_page(sbi, inode->i_ino); |
| 569 | if (IS_ERR(ipage)) { |
| 570 | err = PTR_ERR(ipage); |
| 571 | goto out; |
| 572 | } |
| 573 | |
| 574 | if (f2fs_has_inline_data(inode)) { |
| 575 | if (truncate_inline_inode(ipage, from)) |
| 576 | set_page_dirty(ipage); |
| 577 | f2fs_put_page(ipage, 1); |
| 578 | truncate_page = true; |
| 579 | goto out; |
| 580 | } |
| 581 | |
| 582 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
| 583 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA); |
| 584 | if (err) { |
| 585 | if (err == -ENOENT) |
| 586 | goto free_next; |
| 587 | goto out; |
| 588 | } |
| 589 | |
| 590 | count = ADDRS_PER_PAGE(dn.node_page, inode); |
| 591 | |
| 592 | count -= dn.ofs_in_node; |
| 593 | f2fs_bug_on(sbi, count < 0); |
| 594 | |
| 595 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
| 596 | truncate_data_blocks_range(&dn, count); |
| 597 | free_from += count; |
| 598 | } |
| 599 | |
| 600 | f2fs_put_dnode(&dn); |
| 601 | free_next: |
| 602 | err = truncate_inode_blocks(inode, free_from); |
| 603 | out: |
| 604 | if (lock) |
| 605 | f2fs_unlock_op(sbi); |
| 606 | free_partial: |
| 607 | /* lastly zero out the first data page */ |
| 608 | if (!err) |
| 609 | err = truncate_partial_data_page(inode, from, truncate_page); |
| 610 | |
| 611 | trace_f2fs_truncate_blocks_exit(inode, err); |
| 612 | return err; |
| 613 | } |
| 614 | |
| 615 | int f2fs_truncate(struct inode *inode) |
| 616 | { |
| 617 | int err; |
| 618 | |
| 619 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || |
| 620 | S_ISLNK(inode->i_mode))) |
| 621 | return 0; |
| 622 | |
| 623 | trace_f2fs_truncate(inode); |
| 624 | |
| 625 | /* we should check inline_data size */ |
| 626 | if (!f2fs_may_inline_data(inode)) { |
| 627 | err = f2fs_convert_inline_inode(inode); |
| 628 | if (err) |
| 629 | return err; |
| 630 | } |
| 631 | |
| 632 | err = truncate_blocks(inode, i_size_read(inode), true); |
| 633 | if (err) |
| 634 | return err; |
| 635 | |
| 636 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 637 | f2fs_mark_inode_dirty_sync(inode); |
| 638 | return 0; |
| 639 | } |
| 640 | |
| 641 | int f2fs_getattr(struct vfsmount *mnt, |
| 642 | struct dentry *dentry, struct kstat *stat) |
| 643 | { |
| 644 | struct inode *inode = d_inode(dentry); |
| 645 | generic_fillattr(inode, stat); |
| 646 | stat->blocks <<= 3; |
| 647 | return 0; |
| 648 | } |
| 649 | |
| 650 | #ifdef CONFIG_F2FS_FS_POSIX_ACL |
| 651 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) |
| 652 | { |
| 653 | unsigned int ia_valid = attr->ia_valid; |
| 654 | |
| 655 | if (ia_valid & ATTR_UID) |
| 656 | inode->i_uid = attr->ia_uid; |
| 657 | if (ia_valid & ATTR_GID) |
| 658 | inode->i_gid = attr->ia_gid; |
| 659 | if (ia_valid & ATTR_ATIME) |
| 660 | inode->i_atime = timespec_trunc(attr->ia_atime, |
| 661 | inode->i_sb->s_time_gran); |
| 662 | if (ia_valid & ATTR_MTIME) |
| 663 | inode->i_mtime = timespec_trunc(attr->ia_mtime, |
| 664 | inode->i_sb->s_time_gran); |
| 665 | if (ia_valid & ATTR_CTIME) |
| 666 | inode->i_ctime = timespec_trunc(attr->ia_ctime, |
| 667 | inode->i_sb->s_time_gran); |
| 668 | if (ia_valid & ATTR_MODE) { |
| 669 | umode_t mode = attr->ia_mode; |
| 670 | |
| 671 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) |
| 672 | mode &= ~S_ISGID; |
| 673 | set_acl_inode(inode, mode); |
| 674 | } |
| 675 | } |
| 676 | #else |
| 677 | #define __setattr_copy setattr_copy |
| 678 | #endif |
| 679 | |
| 680 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) |
| 681 | { |
| 682 | struct inode *inode = d_inode(dentry); |
| 683 | int err; |
| 684 | |
| 685 | err = inode_change_ok(inode, attr); |
| 686 | if (err) |
| 687 | return err; |
| 688 | |
| 689 | if (attr->ia_valid & ATTR_SIZE) { |
| 690 | if (f2fs_encrypted_inode(inode) && |
| 691 | fscrypt_get_encryption_info(inode)) |
| 692 | return -EACCES; |
| 693 | |
| 694 | if (attr->ia_size <= i_size_read(inode)) { |
| 695 | truncate_setsize(inode, attr->ia_size); |
| 696 | err = f2fs_truncate(inode); |
| 697 | if (err) |
| 698 | return err; |
| 699 | f2fs_balance_fs(F2FS_I_SB(inode), true); |
| 700 | } else { |
| 701 | /* |
| 702 | * do not trim all blocks after i_size if target size is |
| 703 | * larger than i_size. |
| 704 | */ |
| 705 | truncate_setsize(inode, attr->ia_size); |
| 706 | |
| 707 | /* should convert inline inode here */ |
| 708 | if (!f2fs_may_inline_data(inode)) { |
| 709 | err = f2fs_convert_inline_inode(inode); |
| 710 | if (err) |
| 711 | return err; |
| 712 | } |
| 713 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | __setattr_copy(inode, attr); |
| 718 | |
| 719 | if (attr->ia_valid & ATTR_MODE) { |
| 720 | err = posix_acl_chmod(inode, get_inode_mode(inode)); |
| 721 | if (err || is_inode_flag_set(inode, FI_ACL_MODE)) { |
| 722 | inode->i_mode = F2FS_I(inode)->i_acl_mode; |
| 723 | clear_inode_flag(inode, FI_ACL_MODE); |
| 724 | } |
| 725 | } |
| 726 | |
| 727 | f2fs_mark_inode_dirty_sync(inode); |
| 728 | return err; |
| 729 | } |
| 730 | |
| 731 | const struct inode_operations f2fs_file_inode_operations = { |
| 732 | .getattr = f2fs_getattr, |
| 733 | .setattr = f2fs_setattr, |
| 734 | .get_acl = f2fs_get_acl, |
| 735 | .set_acl = f2fs_set_acl, |
| 736 | #ifdef CONFIG_F2FS_FS_XATTR |
| 737 | .setxattr = generic_setxattr, |
| 738 | .getxattr = generic_getxattr, |
| 739 | .listxattr = f2fs_listxattr, |
| 740 | .removexattr = generic_removexattr, |
| 741 | #endif |
| 742 | .fiemap = f2fs_fiemap, |
| 743 | }; |
| 744 | |
| 745 | static int fill_zero(struct inode *inode, pgoff_t index, |
| 746 | loff_t start, loff_t len) |
| 747 | { |
| 748 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 749 | struct page *page; |
| 750 | |
| 751 | if (!len) |
| 752 | return 0; |
| 753 | |
| 754 | f2fs_balance_fs(sbi, true); |
| 755 | |
| 756 | f2fs_lock_op(sbi); |
| 757 | page = get_new_data_page(inode, NULL, index, false); |
| 758 | f2fs_unlock_op(sbi); |
| 759 | |
| 760 | if (IS_ERR(page)) |
| 761 | return PTR_ERR(page); |
| 762 | |
| 763 | f2fs_wait_on_page_writeback(page, DATA, true); |
| 764 | zero_user(page, start, len); |
| 765 | set_page_dirty(page); |
| 766 | f2fs_put_page(page, 1); |
| 767 | return 0; |
| 768 | } |
| 769 | |
| 770 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) |
| 771 | { |
| 772 | int err; |
| 773 | |
| 774 | while (pg_start < pg_end) { |
| 775 | struct dnode_of_data dn; |
| 776 | pgoff_t end_offset, count; |
| 777 | |
| 778 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 779 | err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE); |
| 780 | if (err) { |
| 781 | if (err == -ENOENT) { |
| 782 | pg_start++; |
| 783 | continue; |
| 784 | } |
| 785 | return err; |
| 786 | } |
| 787 | |
| 788 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
| 789 | count = min(end_offset - dn.ofs_in_node, pg_end - pg_start); |
| 790 | |
| 791 | f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset); |
| 792 | |
| 793 | truncate_data_blocks_range(&dn, count); |
| 794 | f2fs_put_dnode(&dn); |
| 795 | |
| 796 | pg_start += count; |
| 797 | } |
| 798 | return 0; |
| 799 | } |
| 800 | |
| 801 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len) |
| 802 | { |
| 803 | pgoff_t pg_start, pg_end; |
| 804 | loff_t off_start, off_end; |
| 805 | int ret; |
| 806 | |
| 807 | ret = f2fs_convert_inline_inode(inode); |
| 808 | if (ret) |
| 809 | return ret; |
| 810 | |
| 811 | pg_start = ((unsigned long long) offset) >> PAGE_SHIFT; |
| 812 | pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT; |
| 813 | |
| 814 | off_start = offset & (PAGE_SIZE - 1); |
| 815 | off_end = (offset + len) & (PAGE_SIZE - 1); |
| 816 | |
| 817 | if (pg_start == pg_end) { |
| 818 | ret = fill_zero(inode, pg_start, off_start, |
| 819 | off_end - off_start); |
| 820 | if (ret) |
| 821 | return ret; |
| 822 | } else { |
| 823 | if (off_start) { |
| 824 | ret = fill_zero(inode, pg_start++, off_start, |
| 825 | PAGE_SIZE - off_start); |
| 826 | if (ret) |
| 827 | return ret; |
| 828 | } |
| 829 | if (off_end) { |
| 830 | ret = fill_zero(inode, pg_end, 0, off_end); |
| 831 | if (ret) |
| 832 | return ret; |
| 833 | } |
| 834 | |
| 835 | if (pg_start < pg_end) { |
| 836 | struct address_space *mapping = inode->i_mapping; |
| 837 | loff_t blk_start, blk_end; |
| 838 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 839 | |
| 840 | f2fs_balance_fs(sbi, true); |
| 841 | |
| 842 | blk_start = (loff_t)pg_start << PAGE_SHIFT; |
| 843 | blk_end = (loff_t)pg_end << PAGE_SHIFT; |
| 844 | truncate_inode_pages_range(mapping, blk_start, |
| 845 | blk_end - 1); |
| 846 | |
| 847 | f2fs_lock_op(sbi); |
| 848 | ret = truncate_hole(inode, pg_start, pg_end); |
| 849 | f2fs_unlock_op(sbi); |
| 850 | } |
| 851 | } |
| 852 | |
| 853 | return ret; |
| 854 | } |
| 855 | |
| 856 | static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr, |
| 857 | int *do_replace, pgoff_t off, pgoff_t len) |
| 858 | { |
| 859 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 860 | struct dnode_of_data dn; |
| 861 | int ret, done, i; |
| 862 | |
| 863 | next_dnode: |
| 864 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 865 | ret = get_dnode_of_data(&dn, off, LOOKUP_NODE_RA); |
| 866 | if (ret && ret != -ENOENT) { |
| 867 | return ret; |
| 868 | } else if (ret == -ENOENT) { |
| 869 | if (dn.max_level == 0) |
| 870 | return -ENOENT; |
| 871 | done = min((pgoff_t)ADDRS_PER_BLOCK - dn.ofs_in_node, len); |
| 872 | blkaddr += done; |
| 873 | do_replace += done; |
| 874 | goto next; |
| 875 | } |
| 876 | |
| 877 | done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, inode) - |
| 878 | dn.ofs_in_node, len); |
| 879 | for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) { |
| 880 | *blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
| 881 | if (!is_checkpointed_data(sbi, *blkaddr)) { |
| 882 | |
| 883 | if (test_opt(sbi, LFS)) { |
| 884 | f2fs_put_dnode(&dn); |
| 885 | return -ENOTSUPP; |
| 886 | } |
| 887 | |
| 888 | /* do not invalidate this block address */ |
| 889 | f2fs_update_data_blkaddr(&dn, NULL_ADDR); |
| 890 | *do_replace = 1; |
| 891 | } |
| 892 | } |
| 893 | f2fs_put_dnode(&dn); |
| 894 | next: |
| 895 | len -= done; |
| 896 | off += done; |
| 897 | if (len) |
| 898 | goto next_dnode; |
| 899 | return 0; |
| 900 | } |
| 901 | |
| 902 | static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr, |
| 903 | int *do_replace, pgoff_t off, int len) |
| 904 | { |
| 905 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 906 | struct dnode_of_data dn; |
| 907 | int ret, i; |
| 908 | |
| 909 | for (i = 0; i < len; i++, do_replace++, blkaddr++) { |
| 910 | if (*do_replace == 0) |
| 911 | continue; |
| 912 | |
| 913 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 914 | ret = get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA); |
| 915 | if (ret) { |
| 916 | dec_valid_block_count(sbi, inode, 1); |
| 917 | invalidate_blocks(sbi, *blkaddr); |
| 918 | } else { |
| 919 | f2fs_update_data_blkaddr(&dn, *blkaddr); |
| 920 | } |
| 921 | f2fs_put_dnode(&dn); |
| 922 | } |
| 923 | return 0; |
| 924 | } |
| 925 | |
| 926 | static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode, |
| 927 | block_t *blkaddr, int *do_replace, |
| 928 | pgoff_t src, pgoff_t dst, pgoff_t len, bool full) |
| 929 | { |
| 930 | struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode); |
| 931 | pgoff_t i = 0; |
| 932 | int ret; |
| 933 | |
| 934 | while (i < len) { |
| 935 | if (blkaddr[i] == NULL_ADDR && !full) { |
| 936 | i++; |
| 937 | continue; |
| 938 | } |
| 939 | |
| 940 | if (do_replace[i] || blkaddr[i] == NULL_ADDR) { |
| 941 | struct dnode_of_data dn; |
| 942 | struct node_info ni; |
| 943 | size_t new_size; |
| 944 | pgoff_t ilen; |
| 945 | |
| 946 | set_new_dnode(&dn, dst_inode, NULL, NULL, 0); |
| 947 | ret = get_dnode_of_data(&dn, dst + i, ALLOC_NODE); |
| 948 | if (ret) |
| 949 | return ret; |
| 950 | |
| 951 | get_node_info(sbi, dn.nid, &ni); |
| 952 | ilen = min((pgoff_t) |
| 953 | ADDRS_PER_PAGE(dn.node_page, dst_inode) - |
| 954 | dn.ofs_in_node, len - i); |
| 955 | do { |
| 956 | dn.data_blkaddr = datablock_addr(dn.node_page, |
| 957 | dn.ofs_in_node); |
| 958 | truncate_data_blocks_range(&dn, 1); |
| 959 | |
| 960 | if (do_replace[i]) { |
| 961 | f2fs_i_blocks_write(src_inode, |
| 962 | 1, false); |
| 963 | f2fs_i_blocks_write(dst_inode, |
| 964 | 1, true); |
| 965 | f2fs_replace_block(sbi, &dn, dn.data_blkaddr, |
| 966 | blkaddr[i], ni.version, true, false); |
| 967 | |
| 968 | do_replace[i] = 0; |
| 969 | } |
| 970 | dn.ofs_in_node++; |
| 971 | i++; |
| 972 | new_size = (dst + i) << PAGE_SHIFT; |
| 973 | if (dst_inode->i_size < new_size) |
| 974 | f2fs_i_size_write(dst_inode, new_size); |
| 975 | } while ((do_replace[i] || blkaddr[i] == NULL_ADDR) && --ilen); |
| 976 | |
| 977 | f2fs_put_dnode(&dn); |
| 978 | } else { |
| 979 | struct page *psrc, *pdst; |
| 980 | |
| 981 | psrc = get_lock_data_page(src_inode, src + i, true); |
| 982 | if (IS_ERR(psrc)) |
| 983 | return PTR_ERR(psrc); |
| 984 | pdst = get_new_data_page(dst_inode, NULL, dst + i, |
| 985 | true); |
| 986 | if (IS_ERR(pdst)) { |
| 987 | f2fs_put_page(psrc, 1); |
| 988 | return PTR_ERR(pdst); |
| 989 | } |
| 990 | f2fs_copy_page(psrc, pdst); |
| 991 | set_page_dirty(pdst); |
| 992 | f2fs_put_page(pdst, 1); |
| 993 | f2fs_put_page(psrc, 1); |
| 994 | |
| 995 | ret = truncate_hole(src_inode, src + i, src + i + 1); |
| 996 | if (ret) |
| 997 | return ret; |
| 998 | i++; |
| 999 | } |
| 1000 | } |
| 1001 | return 0; |
| 1002 | } |
| 1003 | |
| 1004 | static int __exchange_data_block(struct inode *src_inode, |
| 1005 | struct inode *dst_inode, pgoff_t src, pgoff_t dst, |
| 1006 | pgoff_t len, bool full) |
| 1007 | { |
| 1008 | block_t *src_blkaddr; |
| 1009 | int *do_replace; |
| 1010 | pgoff_t olen; |
| 1011 | int ret; |
| 1012 | |
| 1013 | while (len) { |
| 1014 | olen = min((pgoff_t)4 * ADDRS_PER_BLOCK, len); |
| 1015 | |
| 1016 | src_blkaddr = f2fs_kvzalloc(sizeof(block_t) * olen, GFP_KERNEL); |
| 1017 | if (!src_blkaddr) |
| 1018 | return -ENOMEM; |
| 1019 | |
| 1020 | do_replace = f2fs_kvzalloc(sizeof(int) * olen, GFP_KERNEL); |
| 1021 | if (!do_replace) { |
| 1022 | kvfree(src_blkaddr); |
| 1023 | return -ENOMEM; |
| 1024 | } |
| 1025 | |
| 1026 | ret = __read_out_blkaddrs(src_inode, src_blkaddr, |
| 1027 | do_replace, src, olen); |
| 1028 | if (ret) |
| 1029 | goto roll_back; |
| 1030 | |
| 1031 | ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr, |
| 1032 | do_replace, src, dst, olen, full); |
| 1033 | if (ret) |
| 1034 | goto roll_back; |
| 1035 | |
| 1036 | src += olen; |
| 1037 | dst += olen; |
| 1038 | len -= olen; |
| 1039 | |
| 1040 | kvfree(src_blkaddr); |
| 1041 | kvfree(do_replace); |
| 1042 | } |
| 1043 | return 0; |
| 1044 | |
| 1045 | roll_back: |
| 1046 | __roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, len); |
| 1047 | kvfree(src_blkaddr); |
| 1048 | kvfree(do_replace); |
| 1049 | return ret; |
| 1050 | } |
| 1051 | |
| 1052 | static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end) |
| 1053 | { |
| 1054 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1055 | pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; |
| 1056 | int ret; |
| 1057 | |
| 1058 | f2fs_balance_fs(sbi, true); |
| 1059 | f2fs_lock_op(sbi); |
| 1060 | |
| 1061 | f2fs_drop_extent_tree(inode); |
| 1062 | |
| 1063 | ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true); |
| 1064 | f2fs_unlock_op(sbi); |
| 1065 | return ret; |
| 1066 | } |
| 1067 | |
| 1068 | static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len) |
| 1069 | { |
| 1070 | pgoff_t pg_start, pg_end; |
| 1071 | loff_t new_size; |
| 1072 | int ret; |
| 1073 | |
| 1074 | if (offset + len >= i_size_read(inode)) |
| 1075 | return -EINVAL; |
| 1076 | |
| 1077 | /* collapse range should be aligned to block size of f2fs. */ |
| 1078 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) |
| 1079 | return -EINVAL; |
| 1080 | |
| 1081 | ret = f2fs_convert_inline_inode(inode); |
| 1082 | if (ret) |
| 1083 | return ret; |
| 1084 | |
| 1085 | pg_start = offset >> PAGE_SHIFT; |
| 1086 | pg_end = (offset + len) >> PAGE_SHIFT; |
| 1087 | |
| 1088 | /* write out all dirty pages from offset */ |
| 1089 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| 1090 | if (ret) |
| 1091 | return ret; |
| 1092 | |
| 1093 | truncate_pagecache(inode, offset); |
| 1094 | |
| 1095 | ret = f2fs_do_collapse(inode, pg_start, pg_end); |
| 1096 | if (ret) |
| 1097 | return ret; |
| 1098 | |
| 1099 | /* write out all moved pages, if possible */ |
| 1100 | filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| 1101 | truncate_pagecache(inode, offset); |
| 1102 | |
| 1103 | new_size = i_size_read(inode) - len; |
| 1104 | truncate_pagecache(inode, new_size); |
| 1105 | |
| 1106 | ret = truncate_blocks(inode, new_size, true); |
| 1107 | if (!ret) |
| 1108 | f2fs_i_size_write(inode, new_size); |
| 1109 | |
| 1110 | return ret; |
| 1111 | } |
| 1112 | |
| 1113 | static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start, |
| 1114 | pgoff_t end) |
| 1115 | { |
| 1116 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
| 1117 | pgoff_t index = start; |
| 1118 | unsigned int ofs_in_node = dn->ofs_in_node; |
| 1119 | blkcnt_t count = 0; |
| 1120 | int ret; |
| 1121 | |
| 1122 | for (; index < end; index++, dn->ofs_in_node++) { |
| 1123 | if (datablock_addr(dn->node_page, dn->ofs_in_node) == NULL_ADDR) |
| 1124 | count++; |
| 1125 | } |
| 1126 | |
| 1127 | dn->ofs_in_node = ofs_in_node; |
| 1128 | ret = reserve_new_blocks(dn, count); |
| 1129 | if (ret) |
| 1130 | return ret; |
| 1131 | |
| 1132 | dn->ofs_in_node = ofs_in_node; |
| 1133 | for (index = start; index < end; index++, dn->ofs_in_node++) { |
| 1134 | dn->data_blkaddr = |
| 1135 | datablock_addr(dn->node_page, dn->ofs_in_node); |
| 1136 | /* |
| 1137 | * reserve_new_blocks will not guarantee entire block |
| 1138 | * allocation. |
| 1139 | */ |
| 1140 | if (dn->data_blkaddr == NULL_ADDR) { |
| 1141 | ret = -ENOSPC; |
| 1142 | break; |
| 1143 | } |
| 1144 | if (dn->data_blkaddr != NEW_ADDR) { |
| 1145 | invalidate_blocks(sbi, dn->data_blkaddr); |
| 1146 | dn->data_blkaddr = NEW_ADDR; |
| 1147 | set_data_blkaddr(dn); |
| 1148 | } |
| 1149 | } |
| 1150 | |
| 1151 | f2fs_update_extent_cache_range(dn, start, 0, index - start); |
| 1152 | |
| 1153 | return ret; |
| 1154 | } |
| 1155 | |
| 1156 | static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len, |
| 1157 | int mode) |
| 1158 | { |
| 1159 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1160 | struct address_space *mapping = inode->i_mapping; |
| 1161 | pgoff_t index, pg_start, pg_end; |
| 1162 | loff_t new_size = i_size_read(inode); |
| 1163 | loff_t off_start, off_end; |
| 1164 | int ret = 0; |
| 1165 | |
| 1166 | ret = inode_newsize_ok(inode, (len + offset)); |
| 1167 | if (ret) |
| 1168 | return ret; |
| 1169 | |
| 1170 | ret = f2fs_convert_inline_inode(inode); |
| 1171 | if (ret) |
| 1172 | return ret; |
| 1173 | |
| 1174 | ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1); |
| 1175 | if (ret) |
| 1176 | return ret; |
| 1177 | |
| 1178 | truncate_pagecache_range(inode, offset, offset + len - 1); |
| 1179 | |
| 1180 | pg_start = ((unsigned long long) offset) >> PAGE_SHIFT; |
| 1181 | pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT; |
| 1182 | |
| 1183 | off_start = offset & (PAGE_SIZE - 1); |
| 1184 | off_end = (offset + len) & (PAGE_SIZE - 1); |
| 1185 | |
| 1186 | if (pg_start == pg_end) { |
| 1187 | ret = fill_zero(inode, pg_start, off_start, |
| 1188 | off_end - off_start); |
| 1189 | if (ret) |
| 1190 | return ret; |
| 1191 | |
| 1192 | if (offset + len > new_size) |
| 1193 | new_size = offset + len; |
| 1194 | new_size = max_t(loff_t, new_size, offset + len); |
| 1195 | } else { |
| 1196 | if (off_start) { |
| 1197 | ret = fill_zero(inode, pg_start++, off_start, |
| 1198 | PAGE_SIZE - off_start); |
| 1199 | if (ret) |
| 1200 | return ret; |
| 1201 | |
| 1202 | new_size = max_t(loff_t, new_size, |
| 1203 | (loff_t)pg_start << PAGE_SHIFT); |
| 1204 | } |
| 1205 | |
| 1206 | for (index = pg_start; index < pg_end;) { |
| 1207 | struct dnode_of_data dn; |
| 1208 | unsigned int end_offset; |
| 1209 | pgoff_t end; |
| 1210 | |
| 1211 | f2fs_lock_op(sbi); |
| 1212 | |
| 1213 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 1214 | ret = get_dnode_of_data(&dn, index, ALLOC_NODE); |
| 1215 | if (ret) { |
| 1216 | f2fs_unlock_op(sbi); |
| 1217 | goto out; |
| 1218 | } |
| 1219 | |
| 1220 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
| 1221 | end = min(pg_end, end_offset - dn.ofs_in_node + index); |
| 1222 | |
| 1223 | ret = f2fs_do_zero_range(&dn, index, end); |
| 1224 | f2fs_put_dnode(&dn); |
| 1225 | f2fs_unlock_op(sbi); |
| 1226 | if (ret) |
| 1227 | goto out; |
| 1228 | |
| 1229 | index = end; |
| 1230 | new_size = max_t(loff_t, new_size, |
| 1231 | (loff_t)index << PAGE_SHIFT); |
| 1232 | } |
| 1233 | |
| 1234 | if (off_end) { |
| 1235 | ret = fill_zero(inode, pg_end, 0, off_end); |
| 1236 | if (ret) |
| 1237 | goto out; |
| 1238 | |
| 1239 | new_size = max_t(loff_t, new_size, offset + len); |
| 1240 | } |
| 1241 | } |
| 1242 | |
| 1243 | out: |
| 1244 | if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) |
| 1245 | f2fs_i_size_write(inode, new_size); |
| 1246 | |
| 1247 | return ret; |
| 1248 | } |
| 1249 | |
| 1250 | static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len) |
| 1251 | { |
| 1252 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1253 | pgoff_t nr, pg_start, pg_end, delta, idx; |
| 1254 | loff_t new_size; |
| 1255 | int ret = 0; |
| 1256 | |
| 1257 | new_size = i_size_read(inode) + len; |
| 1258 | if (new_size > inode->i_sb->s_maxbytes) |
| 1259 | return -EFBIG; |
| 1260 | |
| 1261 | if (offset >= i_size_read(inode)) |
| 1262 | return -EINVAL; |
| 1263 | |
| 1264 | /* insert range should be aligned to block size of f2fs. */ |
| 1265 | if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1)) |
| 1266 | return -EINVAL; |
| 1267 | |
| 1268 | ret = f2fs_convert_inline_inode(inode); |
| 1269 | if (ret) |
| 1270 | return ret; |
| 1271 | |
| 1272 | f2fs_balance_fs(sbi, true); |
| 1273 | |
| 1274 | ret = truncate_blocks(inode, i_size_read(inode), true); |
| 1275 | if (ret) |
| 1276 | return ret; |
| 1277 | |
| 1278 | /* write out all dirty pages from offset */ |
| 1279 | ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| 1280 | if (ret) |
| 1281 | return ret; |
| 1282 | |
| 1283 | truncate_pagecache(inode, offset); |
| 1284 | |
| 1285 | pg_start = offset >> PAGE_SHIFT; |
| 1286 | pg_end = (offset + len) >> PAGE_SHIFT; |
| 1287 | delta = pg_end - pg_start; |
| 1288 | idx = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE; |
| 1289 | |
| 1290 | while (!ret && idx > pg_start) { |
| 1291 | nr = idx - pg_start; |
| 1292 | if (nr > delta) |
| 1293 | nr = delta; |
| 1294 | idx -= nr; |
| 1295 | |
| 1296 | f2fs_lock_op(sbi); |
| 1297 | f2fs_drop_extent_tree(inode); |
| 1298 | |
| 1299 | ret = __exchange_data_block(inode, inode, idx, |
| 1300 | idx + delta, nr, false); |
| 1301 | f2fs_unlock_op(sbi); |
| 1302 | } |
| 1303 | |
| 1304 | /* write out all moved pages, if possible */ |
| 1305 | filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX); |
| 1306 | truncate_pagecache(inode, offset); |
| 1307 | |
| 1308 | if (!ret) |
| 1309 | f2fs_i_size_write(inode, new_size); |
| 1310 | return ret; |
| 1311 | } |
| 1312 | |
| 1313 | static int expand_inode_data(struct inode *inode, loff_t offset, |
| 1314 | loff_t len, int mode) |
| 1315 | { |
| 1316 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1317 | struct f2fs_map_blocks map = { .m_next_pgofs = NULL }; |
| 1318 | pgoff_t pg_end; |
| 1319 | loff_t new_size = i_size_read(inode); |
| 1320 | loff_t off_end; |
| 1321 | int ret; |
| 1322 | |
| 1323 | ret = inode_newsize_ok(inode, (len + offset)); |
| 1324 | if (ret) |
| 1325 | return ret; |
| 1326 | |
| 1327 | ret = f2fs_convert_inline_inode(inode); |
| 1328 | if (ret) |
| 1329 | return ret; |
| 1330 | |
| 1331 | f2fs_balance_fs(sbi, true); |
| 1332 | |
| 1333 | pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT; |
| 1334 | off_end = (offset + len) & (PAGE_SIZE - 1); |
| 1335 | |
| 1336 | map.m_lblk = ((unsigned long long)offset) >> PAGE_SHIFT; |
| 1337 | map.m_len = pg_end - map.m_lblk; |
| 1338 | if (off_end) |
| 1339 | map.m_len++; |
| 1340 | |
| 1341 | ret = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); |
| 1342 | if (ret) { |
| 1343 | pgoff_t last_off; |
| 1344 | |
| 1345 | if (!map.m_len) |
| 1346 | return ret; |
| 1347 | |
| 1348 | last_off = map.m_lblk + map.m_len - 1; |
| 1349 | |
| 1350 | /* update new size to the failed position */ |
| 1351 | new_size = (last_off == pg_end) ? offset + len: |
| 1352 | (loff_t)(last_off + 1) << PAGE_SHIFT; |
| 1353 | } else { |
| 1354 | new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end; |
| 1355 | } |
| 1356 | |
| 1357 | if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) |
| 1358 | f2fs_i_size_write(inode, new_size); |
| 1359 | |
| 1360 | return ret; |
| 1361 | } |
| 1362 | |
| 1363 | static long f2fs_fallocate(struct file *file, int mode, |
| 1364 | loff_t offset, loff_t len) |
| 1365 | { |
| 1366 | struct inode *inode = file_inode(file); |
| 1367 | long ret = 0; |
| 1368 | |
| 1369 | /* f2fs only support ->fallocate for regular file */ |
| 1370 | if (!S_ISREG(inode->i_mode)) |
| 1371 | return -EINVAL; |
| 1372 | |
| 1373 | if (f2fs_encrypted_inode(inode) && |
| 1374 | (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE))) |
| 1375 | return -EOPNOTSUPP; |
| 1376 | |
| 1377 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | |
| 1378 | FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE | |
| 1379 | FALLOC_FL_INSERT_RANGE)) |
| 1380 | return -EOPNOTSUPP; |
| 1381 | |
| 1382 | inode_lock(inode); |
| 1383 | |
| 1384 | if (mode & FALLOC_FL_PUNCH_HOLE) { |
| 1385 | if (offset >= inode->i_size) |
| 1386 | goto out; |
| 1387 | |
| 1388 | ret = punch_hole(inode, offset, len); |
| 1389 | } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
| 1390 | ret = f2fs_collapse_range(inode, offset, len); |
| 1391 | } else if (mode & FALLOC_FL_ZERO_RANGE) { |
| 1392 | ret = f2fs_zero_range(inode, offset, len, mode); |
| 1393 | } else if (mode & FALLOC_FL_INSERT_RANGE) { |
| 1394 | ret = f2fs_insert_range(inode, offset, len); |
| 1395 | } else { |
| 1396 | ret = expand_inode_data(inode, offset, len, mode); |
| 1397 | } |
| 1398 | |
| 1399 | if (!ret) { |
| 1400 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
| 1401 | f2fs_mark_inode_dirty_sync(inode); |
| 1402 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1403 | } |
| 1404 | |
| 1405 | out: |
| 1406 | inode_unlock(inode); |
| 1407 | |
| 1408 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
| 1409 | return ret; |
| 1410 | } |
| 1411 | |
| 1412 | static int f2fs_release_file(struct inode *inode, struct file *filp) |
| 1413 | { |
| 1414 | /* |
| 1415 | * f2fs_relase_file is called at every close calls. So we should |
| 1416 | * not drop any inmemory pages by close called by other process. |
| 1417 | */ |
| 1418 | if (!(filp->f_mode & FMODE_WRITE) || |
| 1419 | atomic_read(&inode->i_writecount) != 1) |
| 1420 | return 0; |
| 1421 | |
| 1422 | /* some remained atomic pages should discarded */ |
| 1423 | if (f2fs_is_atomic_file(inode)) |
| 1424 | drop_inmem_pages(inode); |
| 1425 | if (f2fs_is_volatile_file(inode)) { |
| 1426 | clear_inode_flag(inode, FI_VOLATILE_FILE); |
| 1427 | set_inode_flag(inode, FI_DROP_CACHE); |
| 1428 | filemap_fdatawrite(inode->i_mapping); |
| 1429 | clear_inode_flag(inode, FI_DROP_CACHE); |
| 1430 | } |
| 1431 | return 0; |
| 1432 | } |
| 1433 | |
| 1434 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) |
| 1435 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) |
| 1436 | |
| 1437 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) |
| 1438 | { |
| 1439 | if (S_ISDIR(mode)) |
| 1440 | return flags; |
| 1441 | else if (S_ISREG(mode)) |
| 1442 | return flags & F2FS_REG_FLMASK; |
| 1443 | else |
| 1444 | return flags & F2FS_OTHER_FLMASK; |
| 1445 | } |
| 1446 | |
| 1447 | static int f2fs_ioc_getflags(struct file *filp, unsigned long arg) |
| 1448 | { |
| 1449 | struct inode *inode = file_inode(filp); |
| 1450 | struct f2fs_inode_info *fi = F2FS_I(inode); |
| 1451 | unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE; |
| 1452 | return put_user(flags, (int __user *)arg); |
| 1453 | } |
| 1454 | |
| 1455 | static int f2fs_ioc_setflags(struct file *filp, unsigned long arg) |
| 1456 | { |
| 1457 | struct inode *inode = file_inode(filp); |
| 1458 | struct f2fs_inode_info *fi = F2FS_I(inode); |
| 1459 | unsigned int flags; |
| 1460 | unsigned int oldflags; |
| 1461 | int ret; |
| 1462 | |
| 1463 | if (!inode_owner_or_capable(inode)) |
| 1464 | return -EACCES; |
| 1465 | |
| 1466 | if (get_user(flags, (int __user *)arg)) |
| 1467 | return -EFAULT; |
| 1468 | |
| 1469 | ret = mnt_want_write_file(filp); |
| 1470 | if (ret) |
| 1471 | return ret; |
| 1472 | |
| 1473 | flags = f2fs_mask_flags(inode->i_mode, flags); |
| 1474 | |
| 1475 | inode_lock(inode); |
| 1476 | |
| 1477 | oldflags = fi->i_flags; |
| 1478 | |
| 1479 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { |
| 1480 | if (!capable(CAP_LINUX_IMMUTABLE)) { |
| 1481 | inode_unlock(inode); |
| 1482 | ret = -EPERM; |
| 1483 | goto out; |
| 1484 | } |
| 1485 | } |
| 1486 | |
| 1487 | flags = flags & FS_FL_USER_MODIFIABLE; |
| 1488 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; |
| 1489 | fi->i_flags = flags; |
| 1490 | inode_unlock(inode); |
| 1491 | |
| 1492 | inode->i_ctime = CURRENT_TIME; |
| 1493 | f2fs_set_inode_flags(inode); |
| 1494 | out: |
| 1495 | mnt_drop_write_file(filp); |
| 1496 | return ret; |
| 1497 | } |
| 1498 | |
| 1499 | static int f2fs_ioc_getversion(struct file *filp, unsigned long arg) |
| 1500 | { |
| 1501 | struct inode *inode = file_inode(filp); |
| 1502 | |
| 1503 | return put_user(inode->i_generation, (int __user *)arg); |
| 1504 | } |
| 1505 | |
| 1506 | static int f2fs_ioc_start_atomic_write(struct file *filp) |
| 1507 | { |
| 1508 | struct inode *inode = file_inode(filp); |
| 1509 | int ret; |
| 1510 | |
| 1511 | if (!inode_owner_or_capable(inode)) |
| 1512 | return -EACCES; |
| 1513 | |
| 1514 | ret = mnt_want_write_file(filp); |
| 1515 | if (ret) |
| 1516 | return ret; |
| 1517 | |
| 1518 | inode_lock(inode); |
| 1519 | |
| 1520 | if (f2fs_is_atomic_file(inode)) |
| 1521 | goto out; |
| 1522 | |
| 1523 | ret = f2fs_convert_inline_inode(inode); |
| 1524 | if (ret) |
| 1525 | goto out; |
| 1526 | |
| 1527 | set_inode_flag(inode, FI_ATOMIC_FILE); |
| 1528 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1529 | |
| 1530 | if (!get_dirty_pages(inode)) |
| 1531 | goto out; |
| 1532 | |
| 1533 | f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING, |
| 1534 | "Unexpected flush for atomic writes: ino=%lu, npages=%lld", |
| 1535 | inode->i_ino, get_dirty_pages(inode)); |
| 1536 | ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); |
| 1537 | if (ret) |
| 1538 | clear_inode_flag(inode, FI_ATOMIC_FILE); |
| 1539 | out: |
| 1540 | inode_unlock(inode); |
| 1541 | mnt_drop_write_file(filp); |
| 1542 | return ret; |
| 1543 | } |
| 1544 | |
| 1545 | static int f2fs_ioc_commit_atomic_write(struct file *filp) |
| 1546 | { |
| 1547 | struct inode *inode = file_inode(filp); |
| 1548 | int ret; |
| 1549 | |
| 1550 | if (!inode_owner_or_capable(inode)) |
| 1551 | return -EACCES; |
| 1552 | |
| 1553 | ret = mnt_want_write_file(filp); |
| 1554 | if (ret) |
| 1555 | return ret; |
| 1556 | |
| 1557 | inode_lock(inode); |
| 1558 | |
| 1559 | if (f2fs_is_volatile_file(inode)) |
| 1560 | goto err_out; |
| 1561 | |
| 1562 | if (f2fs_is_atomic_file(inode)) { |
| 1563 | clear_inode_flag(inode, FI_ATOMIC_FILE); |
| 1564 | ret = commit_inmem_pages(inode); |
| 1565 | if (ret) { |
| 1566 | set_inode_flag(inode, FI_ATOMIC_FILE); |
| 1567 | goto err_out; |
| 1568 | } |
| 1569 | } |
| 1570 | |
| 1571 | ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true); |
| 1572 | err_out: |
| 1573 | inode_unlock(inode); |
| 1574 | mnt_drop_write_file(filp); |
| 1575 | return ret; |
| 1576 | } |
| 1577 | |
| 1578 | static int f2fs_ioc_start_volatile_write(struct file *filp) |
| 1579 | { |
| 1580 | struct inode *inode = file_inode(filp); |
| 1581 | int ret; |
| 1582 | |
| 1583 | if (!inode_owner_or_capable(inode)) |
| 1584 | return -EACCES; |
| 1585 | |
| 1586 | ret = mnt_want_write_file(filp); |
| 1587 | if (ret) |
| 1588 | return ret; |
| 1589 | |
| 1590 | inode_lock(inode); |
| 1591 | |
| 1592 | if (f2fs_is_volatile_file(inode)) |
| 1593 | goto out; |
| 1594 | |
| 1595 | ret = f2fs_convert_inline_inode(inode); |
| 1596 | if (ret) |
| 1597 | goto out; |
| 1598 | |
| 1599 | set_inode_flag(inode, FI_VOLATILE_FILE); |
| 1600 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1601 | out: |
| 1602 | inode_unlock(inode); |
| 1603 | mnt_drop_write_file(filp); |
| 1604 | return ret; |
| 1605 | } |
| 1606 | |
| 1607 | static int f2fs_ioc_release_volatile_write(struct file *filp) |
| 1608 | { |
| 1609 | struct inode *inode = file_inode(filp); |
| 1610 | int ret; |
| 1611 | |
| 1612 | if (!inode_owner_or_capable(inode)) |
| 1613 | return -EACCES; |
| 1614 | |
| 1615 | ret = mnt_want_write_file(filp); |
| 1616 | if (ret) |
| 1617 | return ret; |
| 1618 | |
| 1619 | inode_lock(inode); |
| 1620 | |
| 1621 | if (!f2fs_is_volatile_file(inode)) |
| 1622 | goto out; |
| 1623 | |
| 1624 | if (!f2fs_is_first_block_written(inode)) { |
| 1625 | ret = truncate_partial_data_page(inode, 0, true); |
| 1626 | goto out; |
| 1627 | } |
| 1628 | |
| 1629 | ret = punch_hole(inode, 0, F2FS_BLKSIZE); |
| 1630 | out: |
| 1631 | inode_unlock(inode); |
| 1632 | mnt_drop_write_file(filp); |
| 1633 | return ret; |
| 1634 | } |
| 1635 | |
| 1636 | static int f2fs_ioc_abort_volatile_write(struct file *filp) |
| 1637 | { |
| 1638 | struct inode *inode = file_inode(filp); |
| 1639 | int ret; |
| 1640 | |
| 1641 | if (!inode_owner_or_capable(inode)) |
| 1642 | return -EACCES; |
| 1643 | |
| 1644 | ret = mnt_want_write_file(filp); |
| 1645 | if (ret) |
| 1646 | return ret; |
| 1647 | |
| 1648 | inode_lock(inode); |
| 1649 | |
| 1650 | if (f2fs_is_atomic_file(inode)) |
| 1651 | drop_inmem_pages(inode); |
| 1652 | if (f2fs_is_volatile_file(inode)) { |
| 1653 | clear_inode_flag(inode, FI_VOLATILE_FILE); |
| 1654 | ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true); |
| 1655 | } |
| 1656 | |
| 1657 | inode_unlock(inode); |
| 1658 | |
| 1659 | mnt_drop_write_file(filp); |
| 1660 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1661 | return ret; |
| 1662 | } |
| 1663 | |
| 1664 | static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg) |
| 1665 | { |
| 1666 | struct inode *inode = file_inode(filp); |
| 1667 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1668 | struct super_block *sb = sbi->sb; |
| 1669 | __u32 in; |
| 1670 | int ret; |
| 1671 | |
| 1672 | if (!capable(CAP_SYS_ADMIN)) |
| 1673 | return -EPERM; |
| 1674 | |
| 1675 | if (get_user(in, (__u32 __user *)arg)) |
| 1676 | return -EFAULT; |
| 1677 | |
| 1678 | ret = mnt_want_write_file(filp); |
| 1679 | if (ret) |
| 1680 | return ret; |
| 1681 | |
| 1682 | switch (in) { |
| 1683 | case F2FS_GOING_DOWN_FULLSYNC: |
| 1684 | sb = freeze_bdev(sb->s_bdev); |
| 1685 | if (sb && !IS_ERR(sb)) { |
| 1686 | f2fs_stop_checkpoint(sbi, false); |
| 1687 | thaw_bdev(sb->s_bdev, sb); |
| 1688 | } |
| 1689 | break; |
| 1690 | case F2FS_GOING_DOWN_METASYNC: |
| 1691 | /* do checkpoint only */ |
| 1692 | f2fs_sync_fs(sb, 1); |
| 1693 | f2fs_stop_checkpoint(sbi, false); |
| 1694 | break; |
| 1695 | case F2FS_GOING_DOWN_NOSYNC: |
| 1696 | f2fs_stop_checkpoint(sbi, false); |
| 1697 | break; |
| 1698 | case F2FS_GOING_DOWN_METAFLUSH: |
| 1699 | sync_meta_pages(sbi, META, LONG_MAX); |
| 1700 | f2fs_stop_checkpoint(sbi, false); |
| 1701 | break; |
| 1702 | default: |
| 1703 | ret = -EINVAL; |
| 1704 | goto out; |
| 1705 | } |
| 1706 | f2fs_update_time(sbi, REQ_TIME); |
| 1707 | out: |
| 1708 | mnt_drop_write_file(filp); |
| 1709 | return ret; |
| 1710 | } |
| 1711 | |
| 1712 | static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg) |
| 1713 | { |
| 1714 | struct inode *inode = file_inode(filp); |
| 1715 | struct super_block *sb = inode->i_sb; |
| 1716 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
| 1717 | struct fstrim_range range; |
| 1718 | int ret; |
| 1719 | |
| 1720 | if (!capable(CAP_SYS_ADMIN)) |
| 1721 | return -EPERM; |
| 1722 | |
| 1723 | if (!blk_queue_discard(q)) |
| 1724 | return -EOPNOTSUPP; |
| 1725 | |
| 1726 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
| 1727 | sizeof(range))) |
| 1728 | return -EFAULT; |
| 1729 | |
| 1730 | ret = mnt_want_write_file(filp); |
| 1731 | if (ret) |
| 1732 | return ret; |
| 1733 | |
| 1734 | range.minlen = max((unsigned int)range.minlen, |
| 1735 | q->limits.discard_granularity); |
| 1736 | ret = f2fs_trim_fs(F2FS_SB(sb), &range); |
| 1737 | mnt_drop_write_file(filp); |
| 1738 | if (ret < 0) |
| 1739 | return ret; |
| 1740 | |
| 1741 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
| 1742 | sizeof(range))) |
| 1743 | return -EFAULT; |
| 1744 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1745 | return 0; |
| 1746 | } |
| 1747 | |
| 1748 | static bool uuid_is_nonzero(__u8 u[16]) |
| 1749 | { |
| 1750 | int i; |
| 1751 | |
| 1752 | for (i = 0; i < 16; i++) |
| 1753 | if (u[i]) |
| 1754 | return true; |
| 1755 | return false; |
| 1756 | } |
| 1757 | |
| 1758 | static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg) |
| 1759 | { |
| 1760 | struct fscrypt_policy policy; |
| 1761 | struct inode *inode = file_inode(filp); |
| 1762 | int ret; |
| 1763 | |
| 1764 | if (copy_from_user(&policy, (struct fscrypt_policy __user *)arg, |
| 1765 | sizeof(policy))) |
| 1766 | return -EFAULT; |
| 1767 | |
| 1768 | ret = mnt_want_write_file(filp); |
| 1769 | if (ret) |
| 1770 | return ret; |
| 1771 | |
| 1772 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
| 1773 | ret = fscrypt_process_policy(inode, &policy); |
| 1774 | |
| 1775 | mnt_drop_write_file(filp); |
| 1776 | return ret; |
| 1777 | } |
| 1778 | |
| 1779 | static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg) |
| 1780 | { |
| 1781 | struct fscrypt_policy policy; |
| 1782 | struct inode *inode = file_inode(filp); |
| 1783 | int err; |
| 1784 | |
| 1785 | err = fscrypt_get_policy(inode, &policy); |
| 1786 | if (err) |
| 1787 | return err; |
| 1788 | |
| 1789 | if (copy_to_user((struct fscrypt_policy __user *)arg, &policy, sizeof(policy))) |
| 1790 | return -EFAULT; |
| 1791 | return 0; |
| 1792 | } |
| 1793 | |
| 1794 | static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg) |
| 1795 | { |
| 1796 | struct inode *inode = file_inode(filp); |
| 1797 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1798 | int err; |
| 1799 | |
| 1800 | if (!f2fs_sb_has_crypto(inode->i_sb)) |
| 1801 | return -EOPNOTSUPP; |
| 1802 | |
| 1803 | if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt)) |
| 1804 | goto got_it; |
| 1805 | |
| 1806 | err = mnt_want_write_file(filp); |
| 1807 | if (err) |
| 1808 | return err; |
| 1809 | |
| 1810 | /* update superblock with uuid */ |
| 1811 | generate_random_uuid(sbi->raw_super->encrypt_pw_salt); |
| 1812 | |
| 1813 | err = f2fs_commit_super(sbi, false); |
| 1814 | if (err) { |
| 1815 | /* undo new data */ |
| 1816 | memset(sbi->raw_super->encrypt_pw_salt, 0, 16); |
| 1817 | mnt_drop_write_file(filp); |
| 1818 | return err; |
| 1819 | } |
| 1820 | mnt_drop_write_file(filp); |
| 1821 | got_it: |
| 1822 | if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt, |
| 1823 | 16)) |
| 1824 | return -EFAULT; |
| 1825 | return 0; |
| 1826 | } |
| 1827 | |
| 1828 | static int f2fs_ioc_gc(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 | __u32 sync; |
| 1833 | int ret; |
| 1834 | |
| 1835 | if (!capable(CAP_SYS_ADMIN)) |
| 1836 | return -EPERM; |
| 1837 | |
| 1838 | if (get_user(sync, (__u32 __user *)arg)) |
| 1839 | return -EFAULT; |
| 1840 | |
| 1841 | if (f2fs_readonly(sbi->sb)) |
| 1842 | return -EROFS; |
| 1843 | |
| 1844 | ret = mnt_want_write_file(filp); |
| 1845 | if (ret) |
| 1846 | return ret; |
| 1847 | |
| 1848 | if (!sync) { |
| 1849 | if (!mutex_trylock(&sbi->gc_mutex)) { |
| 1850 | ret = -EBUSY; |
| 1851 | goto out; |
| 1852 | } |
| 1853 | } else { |
| 1854 | mutex_lock(&sbi->gc_mutex); |
| 1855 | } |
| 1856 | |
| 1857 | ret = f2fs_gc(sbi, sync); |
| 1858 | out: |
| 1859 | mnt_drop_write_file(filp); |
| 1860 | return ret; |
| 1861 | } |
| 1862 | |
| 1863 | static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg) |
| 1864 | { |
| 1865 | struct inode *inode = file_inode(filp); |
| 1866 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 1867 | int ret; |
| 1868 | |
| 1869 | if (!capable(CAP_SYS_ADMIN)) |
| 1870 | return -EPERM; |
| 1871 | |
| 1872 | if (f2fs_readonly(sbi->sb)) |
| 1873 | return -EROFS; |
| 1874 | |
| 1875 | ret = mnt_want_write_file(filp); |
| 1876 | if (ret) |
| 1877 | return ret; |
| 1878 | |
| 1879 | ret = f2fs_sync_fs(sbi->sb, 1); |
| 1880 | |
| 1881 | mnt_drop_write_file(filp); |
| 1882 | return ret; |
| 1883 | } |
| 1884 | |
| 1885 | static int f2fs_defragment_range(struct f2fs_sb_info *sbi, |
| 1886 | struct file *filp, |
| 1887 | struct f2fs_defragment *range) |
| 1888 | { |
| 1889 | struct inode *inode = file_inode(filp); |
| 1890 | struct f2fs_map_blocks map = { .m_next_pgofs = NULL }; |
| 1891 | struct extent_info ei; |
| 1892 | pgoff_t pg_start, pg_end; |
| 1893 | unsigned int blk_per_seg = sbi->blocks_per_seg; |
| 1894 | unsigned int total = 0, sec_num; |
| 1895 | unsigned int pages_per_sec = sbi->segs_per_sec * blk_per_seg; |
| 1896 | block_t blk_end = 0; |
| 1897 | bool fragmented = false; |
| 1898 | int err; |
| 1899 | |
| 1900 | /* if in-place-update policy is enabled, don't waste time here */ |
| 1901 | if (need_inplace_update(inode)) |
| 1902 | return -EINVAL; |
| 1903 | |
| 1904 | pg_start = range->start >> PAGE_SHIFT; |
| 1905 | pg_end = (range->start + range->len) >> PAGE_SHIFT; |
| 1906 | |
| 1907 | f2fs_balance_fs(sbi, true); |
| 1908 | |
| 1909 | inode_lock(inode); |
| 1910 | |
| 1911 | /* writeback all dirty pages in the range */ |
| 1912 | err = filemap_write_and_wait_range(inode->i_mapping, range->start, |
| 1913 | range->start + range->len - 1); |
| 1914 | if (err) |
| 1915 | goto out; |
| 1916 | |
| 1917 | /* |
| 1918 | * lookup mapping info in extent cache, skip defragmenting if physical |
| 1919 | * block addresses are continuous. |
| 1920 | */ |
| 1921 | if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) { |
| 1922 | if (ei.fofs + ei.len >= pg_end) |
| 1923 | goto out; |
| 1924 | } |
| 1925 | |
| 1926 | map.m_lblk = pg_start; |
| 1927 | |
| 1928 | /* |
| 1929 | * lookup mapping info in dnode page cache, skip defragmenting if all |
| 1930 | * physical block addresses are continuous even if there are hole(s) |
| 1931 | * in logical blocks. |
| 1932 | */ |
| 1933 | while (map.m_lblk < pg_end) { |
| 1934 | map.m_len = pg_end - map.m_lblk; |
| 1935 | err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ); |
| 1936 | if (err) |
| 1937 | goto out; |
| 1938 | |
| 1939 | if (!(map.m_flags & F2FS_MAP_FLAGS)) { |
| 1940 | map.m_lblk++; |
| 1941 | continue; |
| 1942 | } |
| 1943 | |
| 1944 | if (blk_end && blk_end != map.m_pblk) { |
| 1945 | fragmented = true; |
| 1946 | break; |
| 1947 | } |
| 1948 | blk_end = map.m_pblk + map.m_len; |
| 1949 | |
| 1950 | map.m_lblk += map.m_len; |
| 1951 | } |
| 1952 | |
| 1953 | if (!fragmented) |
| 1954 | goto out; |
| 1955 | |
| 1956 | map.m_lblk = pg_start; |
| 1957 | map.m_len = pg_end - pg_start; |
| 1958 | |
| 1959 | sec_num = (map.m_len + pages_per_sec - 1) / pages_per_sec; |
| 1960 | |
| 1961 | /* |
| 1962 | * make sure there are enough free section for LFS allocation, this can |
| 1963 | * avoid defragment running in SSR mode when free section are allocated |
| 1964 | * intensively |
| 1965 | */ |
| 1966 | if (has_not_enough_free_secs(sbi, sec_num)) { |
| 1967 | err = -EAGAIN; |
| 1968 | goto out; |
| 1969 | } |
| 1970 | |
| 1971 | while (map.m_lblk < pg_end) { |
| 1972 | pgoff_t idx; |
| 1973 | int cnt = 0; |
| 1974 | |
| 1975 | do_map: |
| 1976 | map.m_len = pg_end - map.m_lblk; |
| 1977 | err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ); |
| 1978 | if (err) |
| 1979 | goto clear_out; |
| 1980 | |
| 1981 | if (!(map.m_flags & F2FS_MAP_FLAGS)) { |
| 1982 | map.m_lblk++; |
| 1983 | continue; |
| 1984 | } |
| 1985 | |
| 1986 | set_inode_flag(inode, FI_DO_DEFRAG); |
| 1987 | |
| 1988 | idx = map.m_lblk; |
| 1989 | while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) { |
| 1990 | struct page *page; |
| 1991 | |
| 1992 | page = get_lock_data_page(inode, idx, true); |
| 1993 | if (IS_ERR(page)) { |
| 1994 | err = PTR_ERR(page); |
| 1995 | goto clear_out; |
| 1996 | } |
| 1997 | |
| 1998 | set_page_dirty(page); |
| 1999 | f2fs_put_page(page, 1); |
| 2000 | |
| 2001 | idx++; |
| 2002 | cnt++; |
| 2003 | total++; |
| 2004 | } |
| 2005 | |
| 2006 | map.m_lblk = idx; |
| 2007 | |
| 2008 | if (idx < pg_end && cnt < blk_per_seg) |
| 2009 | goto do_map; |
| 2010 | |
| 2011 | clear_inode_flag(inode, FI_DO_DEFRAG); |
| 2012 | |
| 2013 | err = filemap_fdatawrite(inode->i_mapping); |
| 2014 | if (err) |
| 2015 | goto out; |
| 2016 | } |
| 2017 | clear_out: |
| 2018 | clear_inode_flag(inode, FI_DO_DEFRAG); |
| 2019 | out: |
| 2020 | inode_unlock(inode); |
| 2021 | if (!err) |
| 2022 | range->len = (u64)total << PAGE_SHIFT; |
| 2023 | return err; |
| 2024 | } |
| 2025 | |
| 2026 | static int f2fs_ioc_defragment(struct file *filp, unsigned long arg) |
| 2027 | { |
| 2028 | struct inode *inode = file_inode(filp); |
| 2029 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
| 2030 | struct f2fs_defragment range; |
| 2031 | int err; |
| 2032 | |
| 2033 | if (!capable(CAP_SYS_ADMIN)) |
| 2034 | return -EPERM; |
| 2035 | |
| 2036 | if (!S_ISREG(inode->i_mode)) |
| 2037 | return -EINVAL; |
| 2038 | |
| 2039 | err = mnt_want_write_file(filp); |
| 2040 | if (err) |
| 2041 | return err; |
| 2042 | |
| 2043 | if (f2fs_readonly(sbi->sb)) { |
| 2044 | err = -EROFS; |
| 2045 | goto out; |
| 2046 | } |
| 2047 | |
| 2048 | if (copy_from_user(&range, (struct f2fs_defragment __user *)arg, |
| 2049 | sizeof(range))) { |
| 2050 | err = -EFAULT; |
| 2051 | goto out; |
| 2052 | } |
| 2053 | |
| 2054 | /* verify alignment of offset & size */ |
| 2055 | if (range.start & (F2FS_BLKSIZE - 1) || |
| 2056 | range.len & (F2FS_BLKSIZE - 1)) { |
| 2057 | err = -EINVAL; |
| 2058 | goto out; |
| 2059 | } |
| 2060 | |
| 2061 | err = f2fs_defragment_range(sbi, filp, &range); |
| 2062 | f2fs_update_time(sbi, REQ_TIME); |
| 2063 | if (err < 0) |
| 2064 | goto out; |
| 2065 | |
| 2066 | if (copy_to_user((struct f2fs_defragment __user *)arg, &range, |
| 2067 | sizeof(range))) |
| 2068 | err = -EFAULT; |
| 2069 | out: |
| 2070 | mnt_drop_write_file(filp); |
| 2071 | return err; |
| 2072 | } |
| 2073 | |
| 2074 | static int f2fs_move_file_range(struct file *file_in, loff_t pos_in, |
| 2075 | struct file *file_out, loff_t pos_out, size_t len) |
| 2076 | { |
| 2077 | struct inode *src = file_inode(file_in); |
| 2078 | struct inode *dst = file_inode(file_out); |
| 2079 | struct f2fs_sb_info *sbi = F2FS_I_SB(src); |
| 2080 | size_t olen = len, dst_max_i_size = 0; |
| 2081 | size_t dst_osize; |
| 2082 | int ret; |
| 2083 | |
| 2084 | if (file_in->f_path.mnt != file_out->f_path.mnt || |
| 2085 | src->i_sb != dst->i_sb) |
| 2086 | return -EXDEV; |
| 2087 | |
| 2088 | if (unlikely(f2fs_readonly(src->i_sb))) |
| 2089 | return -EROFS; |
| 2090 | |
| 2091 | if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode)) |
| 2092 | return -EINVAL; |
| 2093 | |
| 2094 | if (f2fs_encrypted_inode(src) || f2fs_encrypted_inode(dst)) |
| 2095 | return -EOPNOTSUPP; |
| 2096 | |
| 2097 | inode_lock(src); |
| 2098 | if (src != dst) { |
| 2099 | if (!inode_trylock(dst)) { |
| 2100 | ret = -EBUSY; |
| 2101 | goto out; |
| 2102 | } |
| 2103 | } |
| 2104 | |
| 2105 | ret = -EINVAL; |
| 2106 | if (pos_in + len > src->i_size || pos_in + len < pos_in) |
| 2107 | goto out_unlock; |
| 2108 | if (len == 0) |
| 2109 | olen = len = src->i_size - pos_in; |
| 2110 | if (pos_in + len == src->i_size) |
| 2111 | len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in; |
| 2112 | if (len == 0) { |
| 2113 | ret = 0; |
| 2114 | goto out_unlock; |
| 2115 | } |
| 2116 | |
| 2117 | dst_osize = dst->i_size; |
| 2118 | if (pos_out + olen > dst->i_size) |
| 2119 | dst_max_i_size = pos_out + olen; |
| 2120 | |
| 2121 | /* verify the end result is block aligned */ |
| 2122 | if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) || |
| 2123 | !IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) || |
| 2124 | !IS_ALIGNED(pos_out, F2FS_BLKSIZE)) |
| 2125 | goto out_unlock; |
| 2126 | |
| 2127 | ret = f2fs_convert_inline_inode(src); |
| 2128 | if (ret) |
| 2129 | goto out_unlock; |
| 2130 | |
| 2131 | ret = f2fs_convert_inline_inode(dst); |
| 2132 | if (ret) |
| 2133 | goto out_unlock; |
| 2134 | |
| 2135 | /* write out all dirty pages from offset */ |
| 2136 | ret = filemap_write_and_wait_range(src->i_mapping, |
| 2137 | pos_in, pos_in + len); |
| 2138 | if (ret) |
| 2139 | goto out_unlock; |
| 2140 | |
| 2141 | ret = filemap_write_and_wait_range(dst->i_mapping, |
| 2142 | pos_out, pos_out + len); |
| 2143 | if (ret) |
| 2144 | goto out_unlock; |
| 2145 | |
| 2146 | f2fs_balance_fs(sbi, true); |
| 2147 | f2fs_lock_op(sbi); |
| 2148 | ret = __exchange_data_block(src, dst, pos_in, |
| 2149 | pos_out, len >> F2FS_BLKSIZE_BITS, false); |
| 2150 | |
| 2151 | if (!ret) { |
| 2152 | if (dst_max_i_size) |
| 2153 | f2fs_i_size_write(dst, dst_max_i_size); |
| 2154 | else if (dst_osize != dst->i_size) |
| 2155 | f2fs_i_size_write(dst, dst_osize); |
| 2156 | } |
| 2157 | f2fs_unlock_op(sbi); |
| 2158 | out_unlock: |
| 2159 | if (src != dst) |
| 2160 | inode_unlock(dst); |
| 2161 | out: |
| 2162 | inode_unlock(src); |
| 2163 | return ret; |
| 2164 | } |
| 2165 | |
| 2166 | static int f2fs_ioc_move_range(struct file *filp, unsigned long arg) |
| 2167 | { |
| 2168 | struct f2fs_move_range range; |
| 2169 | struct fd dst; |
| 2170 | int err; |
| 2171 | |
| 2172 | if (!(filp->f_mode & FMODE_READ) || |
| 2173 | !(filp->f_mode & FMODE_WRITE)) |
| 2174 | return -EBADF; |
| 2175 | |
| 2176 | if (copy_from_user(&range, (struct f2fs_move_range __user *)arg, |
| 2177 | sizeof(range))) |
| 2178 | return -EFAULT; |
| 2179 | |
| 2180 | dst = fdget(range.dst_fd); |
| 2181 | if (!dst.file) |
| 2182 | return -EBADF; |
| 2183 | |
| 2184 | if (!(dst.file->f_mode & FMODE_WRITE)) { |
| 2185 | err = -EBADF; |
| 2186 | goto err_out; |
| 2187 | } |
| 2188 | |
| 2189 | err = mnt_want_write_file(filp); |
| 2190 | if (err) |
| 2191 | goto err_out; |
| 2192 | |
| 2193 | err = f2fs_move_file_range(filp, range.pos_in, dst.file, |
| 2194 | range.pos_out, range.len); |
| 2195 | |
| 2196 | mnt_drop_write_file(filp); |
| 2197 | |
| 2198 | if (copy_to_user((struct f2fs_move_range __user *)arg, |
| 2199 | &range, sizeof(range))) |
| 2200 | err = -EFAULT; |
| 2201 | err_out: |
| 2202 | fdput(dst); |
| 2203 | return err; |
| 2204 | } |
| 2205 | |
| 2206 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 2207 | { |
| 2208 | switch (cmd) { |
| 2209 | case F2FS_IOC_GETFLAGS: |
| 2210 | return f2fs_ioc_getflags(filp, arg); |
| 2211 | case F2FS_IOC_SETFLAGS: |
| 2212 | return f2fs_ioc_setflags(filp, arg); |
| 2213 | case F2FS_IOC_GETVERSION: |
| 2214 | return f2fs_ioc_getversion(filp, arg); |
| 2215 | case F2FS_IOC_START_ATOMIC_WRITE: |
| 2216 | return f2fs_ioc_start_atomic_write(filp); |
| 2217 | case F2FS_IOC_COMMIT_ATOMIC_WRITE: |
| 2218 | return f2fs_ioc_commit_atomic_write(filp); |
| 2219 | case F2FS_IOC_START_VOLATILE_WRITE: |
| 2220 | return f2fs_ioc_start_volatile_write(filp); |
| 2221 | case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
| 2222 | return f2fs_ioc_release_volatile_write(filp); |
| 2223 | case F2FS_IOC_ABORT_VOLATILE_WRITE: |
| 2224 | return f2fs_ioc_abort_volatile_write(filp); |
| 2225 | case F2FS_IOC_SHUTDOWN: |
| 2226 | return f2fs_ioc_shutdown(filp, arg); |
| 2227 | case FITRIM: |
| 2228 | return f2fs_ioc_fitrim(filp, arg); |
| 2229 | case F2FS_IOC_SET_ENCRYPTION_POLICY: |
| 2230 | return f2fs_ioc_set_encryption_policy(filp, arg); |
| 2231 | case F2FS_IOC_GET_ENCRYPTION_POLICY: |
| 2232 | return f2fs_ioc_get_encryption_policy(filp, arg); |
| 2233 | case F2FS_IOC_GET_ENCRYPTION_PWSALT: |
| 2234 | return f2fs_ioc_get_encryption_pwsalt(filp, arg); |
| 2235 | case F2FS_IOC_GARBAGE_COLLECT: |
| 2236 | return f2fs_ioc_gc(filp, arg); |
| 2237 | case F2FS_IOC_WRITE_CHECKPOINT: |
| 2238 | return f2fs_ioc_write_checkpoint(filp, arg); |
| 2239 | case F2FS_IOC_DEFRAGMENT: |
| 2240 | return f2fs_ioc_defragment(filp, arg); |
| 2241 | case F2FS_IOC_MOVE_RANGE: |
| 2242 | return f2fs_ioc_move_range(filp, arg); |
| 2243 | default: |
| 2244 | return -ENOTTY; |
| 2245 | } |
| 2246 | } |
| 2247 | |
| 2248 | static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) |
| 2249 | { |
| 2250 | struct file *file = iocb->ki_filp; |
| 2251 | struct inode *inode = file_inode(file); |
| 2252 | struct blk_plug plug; |
| 2253 | ssize_t ret; |
| 2254 | |
| 2255 | if (f2fs_encrypted_inode(inode) && |
| 2256 | !fscrypt_has_encryption_key(inode) && |
| 2257 | fscrypt_get_encryption_info(inode)) |
| 2258 | return -EACCES; |
| 2259 | |
| 2260 | inode_lock(inode); |
| 2261 | ret = generic_write_checks(iocb, from); |
| 2262 | if (ret > 0) { |
| 2263 | ret = f2fs_preallocate_blocks(iocb, from); |
| 2264 | if (!ret) { |
| 2265 | blk_start_plug(&plug); |
| 2266 | ret = __generic_file_write_iter(iocb, from); |
| 2267 | blk_finish_plug(&plug); |
| 2268 | } |
| 2269 | } |
| 2270 | inode_unlock(inode); |
| 2271 | |
| 2272 | if (ret > 0) |
| 2273 | ret = generic_write_sync(iocb, ret); |
| 2274 | return ret; |
| 2275 | } |
| 2276 | |
| 2277 | #ifdef CONFIG_COMPAT |
| 2278 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 2279 | { |
| 2280 | switch (cmd) { |
| 2281 | case F2FS_IOC32_GETFLAGS: |
| 2282 | cmd = F2FS_IOC_GETFLAGS; |
| 2283 | break; |
| 2284 | case F2FS_IOC32_SETFLAGS: |
| 2285 | cmd = F2FS_IOC_SETFLAGS; |
| 2286 | break; |
| 2287 | case F2FS_IOC32_GETVERSION: |
| 2288 | cmd = F2FS_IOC_GETVERSION; |
| 2289 | break; |
| 2290 | case F2FS_IOC_START_ATOMIC_WRITE: |
| 2291 | case F2FS_IOC_COMMIT_ATOMIC_WRITE: |
| 2292 | case F2FS_IOC_START_VOLATILE_WRITE: |
| 2293 | case F2FS_IOC_RELEASE_VOLATILE_WRITE: |
| 2294 | case F2FS_IOC_ABORT_VOLATILE_WRITE: |
| 2295 | case F2FS_IOC_SHUTDOWN: |
| 2296 | case F2FS_IOC_SET_ENCRYPTION_POLICY: |
| 2297 | case F2FS_IOC_GET_ENCRYPTION_PWSALT: |
| 2298 | case F2FS_IOC_GET_ENCRYPTION_POLICY: |
| 2299 | case F2FS_IOC_GARBAGE_COLLECT: |
| 2300 | case F2FS_IOC_WRITE_CHECKPOINT: |
| 2301 | case F2FS_IOC_DEFRAGMENT: |
| 2302 | break; |
| 2303 | case F2FS_IOC_MOVE_RANGE: |
| 2304 | break; |
| 2305 | default: |
| 2306 | return -ENOIOCTLCMD; |
| 2307 | } |
| 2308 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
| 2309 | } |
| 2310 | #endif |
| 2311 | |
| 2312 | const struct file_operations f2fs_file_operations = { |
| 2313 | .llseek = f2fs_llseek, |
| 2314 | .read_iter = generic_file_read_iter, |
| 2315 | .write_iter = f2fs_file_write_iter, |
| 2316 | .open = f2fs_file_open, |
| 2317 | .release = f2fs_release_file, |
| 2318 | .mmap = f2fs_file_mmap, |
| 2319 | .fsync = f2fs_sync_file, |
| 2320 | .fallocate = f2fs_fallocate, |
| 2321 | .unlocked_ioctl = f2fs_ioctl, |
| 2322 | #ifdef CONFIG_COMPAT |
| 2323 | .compat_ioctl = f2fs_compat_ioctl, |
| 2324 | #endif |
| 2325 | .splice_read = generic_file_splice_read, |
| 2326 | .splice_write = iter_file_splice_write, |
| 2327 | }; |