Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
fbfa2cc5 JK |
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> | |
ae51fb31 | 16 | #include <linux/blkdev.h> |
fbfa2cc5 JK |
17 | #include <linux/falloc.h> |
18 | #include <linux/types.h> | |
e9750824 | 19 | #include <linux/compat.h> |
fbfa2cc5 JK |
20 | #include <linux/uaccess.h> |
21 | #include <linux/mount.h> | |
22 | ||
23 | #include "f2fs.h" | |
24 | #include "node.h" | |
25 | #include "segment.h" | |
26 | #include "xattr.h" | |
27 | #include "acl.h" | |
a2a4a7e4 | 28 | #include <trace/events/f2fs.h> |
fbfa2cc5 JK |
29 | |
30 | static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, | |
31 | struct vm_fault *vmf) | |
32 | { | |
33 | struct page *page = vmf->page; | |
6131ffaa | 34 | struct inode *inode = file_inode(vma->vm_file); |
fbfa2cc5 | 35 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 JK |
36 | block_t old_blk_addr; |
37 | struct dnode_of_data dn; | |
39936837 | 38 | int err, ilock; |
fbfa2cc5 JK |
39 | |
40 | f2fs_balance_fs(sbi); | |
41 | ||
42 | sb_start_pagefault(inode->i_sb); | |
43 | ||
fbfa2cc5 | 44 | /* block allocation */ |
39936837 | 45 | ilock = mutex_lock_op(sbi); |
fbfa2cc5 | 46 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 47 | err = get_dnode_of_data(&dn, page->index, ALLOC_NODE); |
fbfa2cc5 | 48 | if (err) { |
39936837 | 49 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
50 | goto out; |
51 | } | |
52 | ||
53 | old_blk_addr = dn.data_blkaddr; | |
fbfa2cc5 JK |
54 | |
55 | if (old_blk_addr == NULL_ADDR) { | |
56 | err = reserve_new_block(&dn); | |
57 | if (err) { | |
58 | f2fs_put_dnode(&dn); | |
39936837 | 59 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
60 | goto out; |
61 | } | |
62 | } | |
63 | f2fs_put_dnode(&dn); | |
39936837 | 64 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 | 65 | |
9851e6e1 | 66 | file_update_time(vma->vm_file); |
fbfa2cc5 JK |
67 | lock_page(page); |
68 | if (page->mapping != inode->i_mapping || | |
9851e6e1 | 69 | page_offset(page) > i_size_read(inode) || |
fbfa2cc5 JK |
70 | !PageUptodate(page)) { |
71 | unlock_page(page); | |
72 | err = -EFAULT; | |
73 | goto out; | |
74 | } | |
75 | ||
76 | /* | |
77 | * check to see if the page is mapped already (no holes) | |
78 | */ | |
79 | if (PageMappedToDisk(page)) | |
9851e6e1 | 80 | goto mapped; |
fbfa2cc5 JK |
81 | |
82 | /* page is wholly or partially inside EOF */ | |
83 | if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) { | |
84 | unsigned offset; | |
85 | offset = i_size_read(inode) & ~PAGE_CACHE_MASK; | |
86 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
87 | } | |
88 | set_page_dirty(page); | |
89 | SetPageUptodate(page); | |
90 | ||
9851e6e1 NJ |
91 | mapped: |
92 | /* fill the page */ | |
93 | wait_on_page_writeback(page); | |
fbfa2cc5 JK |
94 | out: |
95 | sb_end_pagefault(inode->i_sb); | |
96 | return block_page_mkwrite_return(err); | |
97 | } | |
98 | ||
99 | static const struct vm_operations_struct f2fs_file_vm_ops = { | |
692bb55d JK |
100 | .fault = filemap_fault, |
101 | .page_mkwrite = f2fs_vm_page_mkwrite, | |
102 | .remap_pages = generic_file_remap_pages, | |
fbfa2cc5 JK |
103 | }; |
104 | ||
fbfa2cc5 JK |
105 | int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) |
106 | { | |
107 | struct inode *inode = file->f_mapping->host; | |
108 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
fbfa2cc5 JK |
109 | int ret = 0; |
110 | bool need_cp = false; | |
111 | struct writeback_control wbc = { | |
112 | .sync_mode = WB_SYNC_ALL, | |
113 | .nr_to_write = LONG_MAX, | |
114 | .for_reclaim = 0, | |
115 | }; | |
116 | ||
77888c1e | 117 | if (f2fs_readonly(inode->i_sb)) |
1fa95b0b NJ |
118 | return 0; |
119 | ||
a2a4a7e4 | 120 | trace_f2fs_sync_file_enter(inode); |
fbfa2cc5 | 121 | ret = filemap_write_and_wait_range(inode->i_mapping, start, end); |
a2a4a7e4 NJ |
122 | if (ret) { |
123 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); | |
fbfa2cc5 | 124 | return ret; |
a2a4a7e4 | 125 | } |
fbfa2cc5 | 126 | |
7d82db83 JK |
127 | /* guarantee free sections for fsync */ |
128 | f2fs_balance_fs(sbi); | |
129 | ||
fbfa2cc5 JK |
130 | mutex_lock(&inode->i_mutex); |
131 | ||
fbfa2cc5 JK |
132 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) |
133 | goto out; | |
134 | ||
fbfa2cc5 JK |
135 | if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1) |
136 | need_cp = true; | |
953a3e27 | 137 | else if (is_cp_file(inode)) |
fbfa2cc5 | 138 | need_cp = true; |
facb0205 | 139 | else if (!space_for_roll_forward(sbi)) |
fbfa2cc5 | 140 | need_cp = true; |
953a3e27 | 141 | else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino)) |
fbfa2cc5 JK |
142 | need_cp = true; |
143 | ||
fbfa2cc5 JK |
144 | if (need_cp) { |
145 | /* all the dirty node pages should be flushed for POR */ | |
146 | ret = f2fs_sync_fs(inode->i_sb, 1); | |
fbfa2cc5 | 147 | } else { |
398b1ac5 JK |
148 | /* if there is no written node page, write its inode page */ |
149 | while (!sync_node_pages(sbi, inode->i_ino, &wbc)) { | |
150 | ret = f2fs_write_inode(inode, NULL); | |
151 | if (ret) | |
152 | goto out; | |
153 | } | |
fbfa2cc5 JK |
154 | filemap_fdatawait_range(sbi->node_inode->i_mapping, |
155 | 0, LONG_MAX); | |
ae51fb31 | 156 | ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
fbfa2cc5 JK |
157 | } |
158 | out: | |
159 | mutex_unlock(&inode->i_mutex); | |
a2a4a7e4 | 160 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
fbfa2cc5 JK |
161 | return ret; |
162 | } | |
163 | ||
164 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) | |
165 | { | |
166 | file_accessed(file); | |
167 | vma->vm_ops = &f2fs_file_vm_ops; | |
168 | return 0; | |
169 | } | |
170 | ||
b292dcab | 171 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
172 | { |
173 | int nr_free = 0, ofs = dn->ofs_in_node; | |
174 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
175 | struct f2fs_node *raw_node; | |
176 | __le32 *addr; | |
177 | ||
178 | raw_node = page_address(dn->node_page); | |
179 | addr = blkaddr_in_node(raw_node) + ofs; | |
180 | ||
181 | for ( ; count > 0; count--, addr++, dn->ofs_in_node++) { | |
182 | block_t blkaddr = le32_to_cpu(*addr); | |
183 | if (blkaddr == NULL_ADDR) | |
184 | continue; | |
185 | ||
186 | update_extent_cache(NULL_ADDR, dn); | |
187 | invalidate_blocks(sbi, blkaddr); | |
188 | dec_valid_block_count(sbi, dn->inode, 1); | |
189 | nr_free++; | |
190 | } | |
191 | if (nr_free) { | |
192 | set_page_dirty(dn->node_page); | |
193 | sync_inode_page(dn); | |
194 | } | |
195 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
196 | |
197 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
198 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
199 | return nr_free; |
200 | } | |
201 | ||
202 | void truncate_data_blocks(struct dnode_of_data *dn) | |
203 | { | |
204 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
205 | } | |
206 | ||
207 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
208 | { | |
209 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
210 | struct page *page; | |
211 | ||
212 | if (!offset) | |
213 | return; | |
214 | ||
c718379b | 215 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false); |
fbfa2cc5 JK |
216 | if (IS_ERR(page)) |
217 | return; | |
218 | ||
219 | lock_page(page); | |
afcb7ca0 JK |
220 | if (page->mapping != inode->i_mapping) { |
221 | f2fs_put_page(page, 1); | |
222 | return; | |
223 | } | |
fbfa2cc5 JK |
224 | wait_on_page_writeback(page); |
225 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); | |
226 | set_page_dirty(page); | |
227 | f2fs_put_page(page, 1); | |
228 | } | |
229 | ||
230 | static int truncate_blocks(struct inode *inode, u64 from) | |
231 | { | |
232 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
233 | unsigned int blocksize = inode->i_sb->s_blocksize; | |
234 | struct dnode_of_data dn; | |
235 | pgoff_t free_from; | |
39936837 | 236 | int count = 0, ilock = -1; |
fbfa2cc5 JK |
237 | int err; |
238 | ||
51dd6249 NJ |
239 | trace_f2fs_truncate_blocks_enter(inode, from); |
240 | ||
fbfa2cc5 JK |
241 | free_from = (pgoff_t) |
242 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
243 | ||
39936837 | 244 | ilock = mutex_lock_op(sbi); |
fbfa2cc5 | 245 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 246 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
247 | if (err) { |
248 | if (err == -ENOENT) | |
249 | goto free_next; | |
39936837 | 250 | mutex_unlock_op(sbi, ilock); |
51dd6249 | 251 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
252 | return err; |
253 | } | |
254 | ||
255 | if (IS_INODE(dn.node_page)) | |
256 | count = ADDRS_PER_INODE; | |
257 | else | |
258 | count = ADDRS_PER_BLOCK; | |
259 | ||
260 | count -= dn.ofs_in_node; | |
261 | BUG_ON(count < 0); | |
39936837 | 262 | |
fbfa2cc5 JK |
263 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
264 | truncate_data_blocks_range(&dn, count); | |
265 | free_from += count; | |
266 | } | |
267 | ||
268 | f2fs_put_dnode(&dn); | |
269 | free_next: | |
270 | err = truncate_inode_blocks(inode, free_from); | |
39936837 | 271 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
272 | |
273 | /* lastly zero out the first data page */ | |
274 | truncate_partial_data_page(inode, from); | |
275 | ||
51dd6249 | 276 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
277 | return err; |
278 | } | |
279 | ||
280 | void f2fs_truncate(struct inode *inode) | |
281 | { | |
282 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
283 | S_ISLNK(inode->i_mode))) | |
284 | return; | |
285 | ||
51dd6249 NJ |
286 | trace_f2fs_truncate(inode); |
287 | ||
fbfa2cc5 JK |
288 | if (!truncate_blocks(inode, i_size_read(inode))) { |
289 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
290 | mark_inode_dirty(inode); | |
291 | } | |
fbfa2cc5 JK |
292 | } |
293 | ||
2d4d9fb5 | 294 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
295 | struct dentry *dentry, struct kstat *stat) |
296 | { | |
297 | struct inode *inode = dentry->d_inode; | |
298 | generic_fillattr(inode, stat); | |
299 | stat->blocks <<= 3; | |
300 | return 0; | |
301 | } | |
302 | ||
303 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
304 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
305 | { | |
306 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
307 | unsigned int ia_valid = attr->ia_valid; | |
308 | ||
309 | if (ia_valid & ATTR_UID) | |
310 | inode->i_uid = attr->ia_uid; | |
311 | if (ia_valid & ATTR_GID) | |
312 | inode->i_gid = attr->ia_gid; | |
313 | if (ia_valid & ATTR_ATIME) | |
314 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
315 | inode->i_sb->s_time_gran); | |
316 | if (ia_valid & ATTR_MTIME) | |
317 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
318 | inode->i_sb->s_time_gran); | |
319 | if (ia_valid & ATTR_CTIME) | |
320 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
321 | inode->i_sb->s_time_gran); | |
322 | if (ia_valid & ATTR_MODE) { | |
323 | umode_t mode = attr->ia_mode; | |
324 | ||
325 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
326 | mode &= ~S_ISGID; | |
327 | set_acl_inode(fi, mode); | |
328 | } | |
329 | } | |
330 | #else | |
331 | #define __setattr_copy setattr_copy | |
332 | #endif | |
333 | ||
334 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
335 | { | |
336 | struct inode *inode = dentry->d_inode; | |
337 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
338 | int err; | |
339 | ||
340 | err = inode_change_ok(inode, attr); | |
341 | if (err) | |
342 | return err; | |
343 | ||
344 | if ((attr->ia_valid & ATTR_SIZE) && | |
345 | attr->ia_size != i_size_read(inode)) { | |
346 | truncate_setsize(inode, attr->ia_size); | |
347 | f2fs_truncate(inode); | |
d4686d56 | 348 | f2fs_balance_fs(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
349 | } |
350 | ||
351 | __setattr_copy(inode, attr); | |
352 | ||
353 | if (attr->ia_valid & ATTR_MODE) { | |
354 | err = f2fs_acl_chmod(inode); | |
355 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { | |
356 | inode->i_mode = fi->i_acl_mode; | |
357 | clear_inode_flag(fi, FI_ACL_MODE); | |
358 | } | |
359 | } | |
360 | ||
361 | mark_inode_dirty(inode); | |
362 | return err; | |
363 | } | |
364 | ||
365 | const struct inode_operations f2fs_file_inode_operations = { | |
366 | .getattr = f2fs_getattr, | |
367 | .setattr = f2fs_setattr, | |
368 | .get_acl = f2fs_get_acl, | |
369 | #ifdef CONFIG_F2FS_FS_XATTR | |
370 | .setxattr = generic_setxattr, | |
371 | .getxattr = generic_getxattr, | |
372 | .listxattr = f2fs_listxattr, | |
373 | .removexattr = generic_removexattr, | |
374 | #endif | |
375 | }; | |
376 | ||
377 | static void fill_zero(struct inode *inode, pgoff_t index, | |
378 | loff_t start, loff_t len) | |
379 | { | |
bd43df02 | 380 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 | 381 | struct page *page; |
39936837 | 382 | int ilock; |
fbfa2cc5 JK |
383 | |
384 | if (!len) | |
385 | return; | |
386 | ||
bd43df02 JK |
387 | f2fs_balance_fs(sbi); |
388 | ||
39936837 | 389 | ilock = mutex_lock_op(sbi); |
64aa7ed9 | 390 | page = get_new_data_page(inode, NULL, index, false); |
39936837 | 391 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
392 | |
393 | if (!IS_ERR(page)) { | |
394 | wait_on_page_writeback(page); | |
395 | zero_user(page, start, len); | |
396 | set_page_dirty(page); | |
397 | f2fs_put_page(page, 1); | |
398 | } | |
399 | } | |
400 | ||
401 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
402 | { | |
403 | pgoff_t index; | |
404 | int err; | |
405 | ||
406 | for (index = pg_start; index < pg_end; index++) { | |
407 | struct dnode_of_data dn; | |
9eaeba70 | 408 | |
fbfa2cc5 | 409 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 410 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 411 | if (err) { |
fbfa2cc5 JK |
412 | if (err == -ENOENT) |
413 | continue; | |
414 | return err; | |
415 | } | |
416 | ||
417 | if (dn.data_blkaddr != NULL_ADDR) | |
418 | truncate_data_blocks_range(&dn, 1); | |
419 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
420 | } |
421 | return 0; | |
422 | } | |
423 | ||
424 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len, int mode) | |
425 | { | |
426 | pgoff_t pg_start, pg_end; | |
427 | loff_t off_start, off_end; | |
428 | int ret = 0; | |
429 | ||
430 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
431 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
432 | ||
433 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
434 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
435 | ||
436 | if (pg_start == pg_end) { | |
437 | fill_zero(inode, pg_start, off_start, | |
438 | off_end - off_start); | |
439 | } else { | |
440 | if (off_start) | |
441 | fill_zero(inode, pg_start++, off_start, | |
442 | PAGE_CACHE_SIZE - off_start); | |
443 | if (off_end) | |
444 | fill_zero(inode, pg_end, 0, off_end); | |
445 | ||
446 | if (pg_start < pg_end) { | |
447 | struct address_space *mapping = inode->i_mapping; | |
448 | loff_t blk_start, blk_end; | |
1127a3d4 | 449 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
39936837 | 450 | int ilock; |
1127a3d4 JH |
451 | |
452 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
453 | |
454 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
455 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
456 | truncate_inode_pages_range(mapping, blk_start, | |
457 | blk_end - 1); | |
39936837 JK |
458 | |
459 | ilock = mutex_lock_op(sbi); | |
fbfa2cc5 | 460 | ret = truncate_hole(inode, pg_start, pg_end); |
39936837 | 461 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
462 | } |
463 | } | |
464 | ||
465 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
466 | i_size_read(inode) <= (offset + len)) { | |
467 | i_size_write(inode, offset); | |
468 | mark_inode_dirty(inode); | |
469 | } | |
470 | ||
471 | return ret; | |
472 | } | |
473 | ||
474 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
475 | loff_t len, int mode) | |
476 | { | |
477 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
478 | pgoff_t index, pg_start, pg_end; | |
479 | loff_t new_size = i_size_read(inode); | |
480 | loff_t off_start, off_end; | |
481 | int ret = 0; | |
482 | ||
483 | ret = inode_newsize_ok(inode, (len + offset)); | |
484 | if (ret) | |
485 | return ret; | |
486 | ||
487 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
488 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
489 | ||
490 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
491 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
492 | ||
493 | for (index = pg_start; index <= pg_end; index++) { | |
494 | struct dnode_of_data dn; | |
39936837 | 495 | int ilock; |
fbfa2cc5 | 496 | |
39936837 | 497 | ilock = mutex_lock_op(sbi); |
fbfa2cc5 | 498 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 499 | ret = get_dnode_of_data(&dn, index, ALLOC_NODE); |
fbfa2cc5 | 500 | if (ret) { |
39936837 | 501 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
502 | break; |
503 | } | |
504 | ||
505 | if (dn.data_blkaddr == NULL_ADDR) { | |
506 | ret = reserve_new_block(&dn); | |
507 | if (ret) { | |
508 | f2fs_put_dnode(&dn); | |
39936837 | 509 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
510 | break; |
511 | } | |
512 | } | |
513 | f2fs_put_dnode(&dn); | |
39936837 | 514 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
515 | |
516 | if (pg_start == pg_end) | |
517 | new_size = offset + len; | |
518 | else if (index == pg_start && off_start) | |
519 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
520 | else if (index == pg_end) | |
521 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
522 | else | |
523 | new_size += PAGE_CACHE_SIZE; | |
524 | } | |
525 | ||
526 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
527 | i_size_read(inode) < new_size) { | |
528 | i_size_write(inode, new_size); | |
529 | mark_inode_dirty(inode); | |
530 | } | |
531 | ||
532 | return ret; | |
533 | } | |
534 | ||
535 | static long f2fs_fallocate(struct file *file, int mode, | |
536 | loff_t offset, loff_t len) | |
537 | { | |
6131ffaa | 538 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
539 | long ret; |
540 | ||
541 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
542 | return -EOPNOTSUPP; | |
543 | ||
544 | if (mode & FALLOC_FL_PUNCH_HOLE) | |
545 | ret = punch_hole(inode, offset, len, mode); | |
546 | else | |
547 | ret = expand_inode_data(inode, offset, len, mode); | |
548 | ||
3af60a49 NJ |
549 | if (!ret) { |
550 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
551 | mark_inode_dirty(inode); | |
552 | } | |
c01e2853 | 553 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
554 | return ret; |
555 | } | |
556 | ||
557 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
558 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
559 | ||
560 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
561 | { | |
562 | if (S_ISDIR(mode)) | |
563 | return flags; | |
564 | else if (S_ISREG(mode)) | |
565 | return flags & F2FS_REG_FLMASK; | |
566 | else | |
567 | return flags & F2FS_OTHER_FLMASK; | |
568 | } | |
569 | ||
570 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
571 | { | |
6131ffaa | 572 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
573 | struct f2fs_inode_info *fi = F2FS_I(inode); |
574 | unsigned int flags; | |
575 | int ret; | |
576 | ||
577 | switch (cmd) { | |
578 | case FS_IOC_GETFLAGS: | |
579 | flags = fi->i_flags & FS_FL_USER_VISIBLE; | |
580 | return put_user(flags, (int __user *) arg); | |
581 | case FS_IOC_SETFLAGS: | |
582 | { | |
583 | unsigned int oldflags; | |
584 | ||
bdaec334 | 585 | ret = mnt_want_write_file(filp); |
fbfa2cc5 JK |
586 | if (ret) |
587 | return ret; | |
588 | ||
589 | if (!inode_owner_or_capable(inode)) { | |
590 | ret = -EACCES; | |
591 | goto out; | |
592 | } | |
593 | ||
594 | if (get_user(flags, (int __user *) arg)) { | |
595 | ret = -EFAULT; | |
596 | goto out; | |
597 | } | |
598 | ||
599 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
600 | ||
601 | mutex_lock(&inode->i_mutex); | |
602 | ||
603 | oldflags = fi->i_flags; | |
604 | ||
605 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
606 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
607 | mutex_unlock(&inode->i_mutex); | |
608 | ret = -EPERM; | |
609 | goto out; | |
610 | } | |
611 | } | |
612 | ||
613 | flags = flags & FS_FL_USER_MODIFIABLE; | |
614 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
615 | fi->i_flags = flags; | |
616 | mutex_unlock(&inode->i_mutex); | |
617 | ||
618 | f2fs_set_inode_flags(inode); | |
619 | inode->i_ctime = CURRENT_TIME; | |
620 | mark_inode_dirty(inode); | |
621 | out: | |
bdaec334 | 622 | mnt_drop_write_file(filp); |
fbfa2cc5 JK |
623 | return ret; |
624 | } | |
625 | default: | |
626 | return -ENOTTY; | |
627 | } | |
628 | } | |
629 | ||
e9750824 NJ |
630 | #ifdef CONFIG_COMPAT |
631 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
632 | { | |
633 | switch (cmd) { | |
634 | case F2FS_IOC32_GETFLAGS: | |
635 | cmd = F2FS_IOC_GETFLAGS; | |
636 | break; | |
637 | case F2FS_IOC32_SETFLAGS: | |
638 | cmd = F2FS_IOC_SETFLAGS; | |
639 | break; | |
640 | default: | |
641 | return -ENOIOCTLCMD; | |
642 | } | |
643 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
644 | } | |
645 | #endif | |
646 | ||
fbfa2cc5 JK |
647 | const struct file_operations f2fs_file_operations = { |
648 | .llseek = generic_file_llseek, | |
649 | .read = do_sync_read, | |
650 | .write = do_sync_write, | |
651 | .aio_read = generic_file_aio_read, | |
652 | .aio_write = generic_file_aio_write, | |
653 | .open = generic_file_open, | |
654 | .mmap = f2fs_file_mmap, | |
655 | .fsync = f2fs_sync_file, | |
656 | .fallocate = f2fs_fallocate, | |
657 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
658 | #ifdef CONFIG_COMPAT |
659 | .compat_ioctl = f2fs_compat_ioctl, | |
660 | #endif | |
fbfa2cc5 JK |
661 | .splice_read = generic_file_splice_read, |
662 | .splice_write = generic_file_splice_write, | |
663 | }; |