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)) { | |
b3783873 | 150 | mark_inode_dirty_sync(inode); |
398b1ac5 JK |
151 | ret = f2fs_write_inode(inode, NULL); |
152 | if (ret) | |
153 | goto out; | |
154 | } | |
fbfa2cc5 JK |
155 | filemap_fdatawait_range(sbi->node_inode->i_mapping, |
156 | 0, LONG_MAX); | |
ae51fb31 | 157 | ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
fbfa2cc5 JK |
158 | } |
159 | out: | |
160 | mutex_unlock(&inode->i_mutex); | |
a2a4a7e4 | 161 | trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret); |
fbfa2cc5 JK |
162 | return ret; |
163 | } | |
164 | ||
165 | static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma) | |
166 | { | |
167 | file_accessed(file); | |
168 | vma->vm_ops = &f2fs_file_vm_ops; | |
169 | return 0; | |
170 | } | |
171 | ||
b292dcab | 172 | int truncate_data_blocks_range(struct dnode_of_data *dn, int count) |
fbfa2cc5 JK |
173 | { |
174 | int nr_free = 0, ofs = dn->ofs_in_node; | |
175 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
176 | struct f2fs_node *raw_node; | |
177 | __le32 *addr; | |
178 | ||
179 | raw_node = page_address(dn->node_page); | |
180 | addr = blkaddr_in_node(raw_node) + ofs; | |
181 | ||
182 | for ( ; count > 0; count--, addr++, dn->ofs_in_node++) { | |
183 | block_t blkaddr = le32_to_cpu(*addr); | |
184 | if (blkaddr == NULL_ADDR) | |
185 | continue; | |
186 | ||
187 | update_extent_cache(NULL_ADDR, dn); | |
188 | invalidate_blocks(sbi, blkaddr); | |
fbfa2cc5 JK |
189 | nr_free++; |
190 | } | |
191 | if (nr_free) { | |
d7cc950b | 192 | dec_valid_block_count(sbi, dn->inode, nr_free); |
fbfa2cc5 JK |
193 | set_page_dirty(dn->node_page); |
194 | sync_inode_page(dn); | |
195 | } | |
196 | dn->ofs_in_node = ofs; | |
51dd6249 NJ |
197 | |
198 | trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid, | |
199 | dn->ofs_in_node, nr_free); | |
fbfa2cc5 JK |
200 | return nr_free; |
201 | } | |
202 | ||
203 | void truncate_data_blocks(struct dnode_of_data *dn) | |
204 | { | |
205 | truncate_data_blocks_range(dn, ADDRS_PER_BLOCK); | |
206 | } | |
207 | ||
208 | static void truncate_partial_data_page(struct inode *inode, u64 from) | |
209 | { | |
210 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
211 | struct page *page; | |
212 | ||
213 | if (!offset) | |
214 | return; | |
215 | ||
c718379b | 216 | page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false); |
fbfa2cc5 JK |
217 | if (IS_ERR(page)) |
218 | return; | |
219 | ||
220 | lock_page(page); | |
afcb7ca0 JK |
221 | if (page->mapping != inode->i_mapping) { |
222 | f2fs_put_page(page, 1); | |
223 | return; | |
224 | } | |
fbfa2cc5 JK |
225 | wait_on_page_writeback(page); |
226 | zero_user(page, offset, PAGE_CACHE_SIZE - offset); | |
227 | set_page_dirty(page); | |
228 | f2fs_put_page(page, 1); | |
229 | } | |
230 | ||
231 | static int truncate_blocks(struct inode *inode, u64 from) | |
232 | { | |
233 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
234 | unsigned int blocksize = inode->i_sb->s_blocksize; | |
235 | struct dnode_of_data dn; | |
236 | pgoff_t free_from; | |
39936837 | 237 | int count = 0, ilock = -1; |
fbfa2cc5 JK |
238 | int err; |
239 | ||
51dd6249 NJ |
240 | trace_f2fs_truncate_blocks_enter(inode, from); |
241 | ||
fbfa2cc5 JK |
242 | free_from = (pgoff_t) |
243 | ((from + blocksize - 1) >> (sbi->log_blocksize)); | |
244 | ||
39936837 | 245 | ilock = mutex_lock_op(sbi); |
fbfa2cc5 | 246 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 247 | err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE); |
fbfa2cc5 JK |
248 | if (err) { |
249 | if (err == -ENOENT) | |
250 | goto free_next; | |
39936837 | 251 | mutex_unlock_op(sbi, ilock); |
51dd6249 | 252 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
253 | return err; |
254 | } | |
255 | ||
256 | if (IS_INODE(dn.node_page)) | |
257 | count = ADDRS_PER_INODE; | |
258 | else | |
259 | count = ADDRS_PER_BLOCK; | |
260 | ||
261 | count -= dn.ofs_in_node; | |
262 | BUG_ON(count < 0); | |
39936837 | 263 | |
fbfa2cc5 JK |
264 | if (dn.ofs_in_node || IS_INODE(dn.node_page)) { |
265 | truncate_data_blocks_range(&dn, count); | |
266 | free_from += count; | |
267 | } | |
268 | ||
269 | f2fs_put_dnode(&dn); | |
270 | free_next: | |
271 | err = truncate_inode_blocks(inode, free_from); | |
39936837 | 272 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
273 | |
274 | /* lastly zero out the first data page */ | |
275 | truncate_partial_data_page(inode, from); | |
276 | ||
51dd6249 | 277 | trace_f2fs_truncate_blocks_exit(inode, err); |
fbfa2cc5 JK |
278 | return err; |
279 | } | |
280 | ||
281 | void f2fs_truncate(struct inode *inode) | |
282 | { | |
283 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
284 | S_ISLNK(inode->i_mode))) | |
285 | return; | |
286 | ||
51dd6249 NJ |
287 | trace_f2fs_truncate(inode); |
288 | ||
fbfa2cc5 JK |
289 | if (!truncate_blocks(inode, i_size_read(inode))) { |
290 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
291 | mark_inode_dirty(inode); | |
292 | } | |
fbfa2cc5 JK |
293 | } |
294 | ||
2d4d9fb5 | 295 | int f2fs_getattr(struct vfsmount *mnt, |
fbfa2cc5 JK |
296 | struct dentry *dentry, struct kstat *stat) |
297 | { | |
298 | struct inode *inode = dentry->d_inode; | |
299 | generic_fillattr(inode, stat); | |
300 | stat->blocks <<= 3; | |
301 | return 0; | |
302 | } | |
303 | ||
304 | #ifdef CONFIG_F2FS_FS_POSIX_ACL | |
305 | static void __setattr_copy(struct inode *inode, const struct iattr *attr) | |
306 | { | |
307 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
308 | unsigned int ia_valid = attr->ia_valid; | |
309 | ||
310 | if (ia_valid & ATTR_UID) | |
311 | inode->i_uid = attr->ia_uid; | |
312 | if (ia_valid & ATTR_GID) | |
313 | inode->i_gid = attr->ia_gid; | |
314 | if (ia_valid & ATTR_ATIME) | |
315 | inode->i_atime = timespec_trunc(attr->ia_atime, | |
316 | inode->i_sb->s_time_gran); | |
317 | if (ia_valid & ATTR_MTIME) | |
318 | inode->i_mtime = timespec_trunc(attr->ia_mtime, | |
319 | inode->i_sb->s_time_gran); | |
320 | if (ia_valid & ATTR_CTIME) | |
321 | inode->i_ctime = timespec_trunc(attr->ia_ctime, | |
322 | inode->i_sb->s_time_gran); | |
323 | if (ia_valid & ATTR_MODE) { | |
324 | umode_t mode = attr->ia_mode; | |
325 | ||
326 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) | |
327 | mode &= ~S_ISGID; | |
328 | set_acl_inode(fi, mode); | |
329 | } | |
330 | } | |
331 | #else | |
332 | #define __setattr_copy setattr_copy | |
333 | #endif | |
334 | ||
335 | int f2fs_setattr(struct dentry *dentry, struct iattr *attr) | |
336 | { | |
337 | struct inode *inode = dentry->d_inode; | |
338 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
339 | int err; | |
340 | ||
341 | err = inode_change_ok(inode, attr); | |
342 | if (err) | |
343 | return err; | |
344 | ||
345 | if ((attr->ia_valid & ATTR_SIZE) && | |
346 | attr->ia_size != i_size_read(inode)) { | |
347 | truncate_setsize(inode, attr->ia_size); | |
348 | f2fs_truncate(inode); | |
d4686d56 | 349 | f2fs_balance_fs(F2FS_SB(inode->i_sb)); |
fbfa2cc5 JK |
350 | } |
351 | ||
352 | __setattr_copy(inode, attr); | |
353 | ||
354 | if (attr->ia_valid & ATTR_MODE) { | |
355 | err = f2fs_acl_chmod(inode); | |
356 | if (err || is_inode_flag_set(fi, FI_ACL_MODE)) { | |
357 | inode->i_mode = fi->i_acl_mode; | |
358 | clear_inode_flag(fi, FI_ACL_MODE); | |
359 | } | |
360 | } | |
361 | ||
362 | mark_inode_dirty(inode); | |
363 | return err; | |
364 | } | |
365 | ||
366 | const struct inode_operations f2fs_file_inode_operations = { | |
367 | .getattr = f2fs_getattr, | |
368 | .setattr = f2fs_setattr, | |
369 | .get_acl = f2fs_get_acl, | |
370 | #ifdef CONFIG_F2FS_FS_XATTR | |
371 | .setxattr = generic_setxattr, | |
372 | .getxattr = generic_getxattr, | |
373 | .listxattr = f2fs_listxattr, | |
374 | .removexattr = generic_removexattr, | |
375 | #endif | |
376 | }; | |
377 | ||
378 | static void fill_zero(struct inode *inode, pgoff_t index, | |
379 | loff_t start, loff_t len) | |
380 | { | |
bd43df02 | 381 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
fbfa2cc5 | 382 | struct page *page; |
39936837 | 383 | int ilock; |
fbfa2cc5 JK |
384 | |
385 | if (!len) | |
386 | return; | |
387 | ||
bd43df02 JK |
388 | f2fs_balance_fs(sbi); |
389 | ||
39936837 | 390 | ilock = mutex_lock_op(sbi); |
64aa7ed9 | 391 | page = get_new_data_page(inode, NULL, index, false); |
39936837 | 392 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
393 | |
394 | if (!IS_ERR(page)) { | |
395 | wait_on_page_writeback(page); | |
396 | zero_user(page, start, len); | |
397 | set_page_dirty(page); | |
398 | f2fs_put_page(page, 1); | |
399 | } | |
400 | } | |
401 | ||
402 | int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end) | |
403 | { | |
404 | pgoff_t index; | |
405 | int err; | |
406 | ||
407 | for (index = pg_start; index < pg_end; index++) { | |
408 | struct dnode_of_data dn; | |
9eaeba70 | 409 | |
fbfa2cc5 | 410 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 411 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
fbfa2cc5 | 412 | if (err) { |
fbfa2cc5 JK |
413 | if (err == -ENOENT) |
414 | continue; | |
415 | return err; | |
416 | } | |
417 | ||
418 | if (dn.data_blkaddr != NULL_ADDR) | |
419 | truncate_data_blocks_range(&dn, 1); | |
420 | f2fs_put_dnode(&dn); | |
fbfa2cc5 JK |
421 | } |
422 | return 0; | |
423 | } | |
424 | ||
425 | static int punch_hole(struct inode *inode, loff_t offset, loff_t len, int mode) | |
426 | { | |
427 | pgoff_t pg_start, pg_end; | |
428 | loff_t off_start, off_end; | |
429 | int ret = 0; | |
430 | ||
431 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
432 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
433 | ||
434 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
435 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
436 | ||
437 | if (pg_start == pg_end) { | |
438 | fill_zero(inode, pg_start, off_start, | |
439 | off_end - off_start); | |
440 | } else { | |
441 | if (off_start) | |
442 | fill_zero(inode, pg_start++, off_start, | |
443 | PAGE_CACHE_SIZE - off_start); | |
444 | if (off_end) | |
445 | fill_zero(inode, pg_end, 0, off_end); | |
446 | ||
447 | if (pg_start < pg_end) { | |
448 | struct address_space *mapping = inode->i_mapping; | |
449 | loff_t blk_start, blk_end; | |
1127a3d4 | 450 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
39936837 | 451 | int ilock; |
1127a3d4 JH |
452 | |
453 | f2fs_balance_fs(sbi); | |
fbfa2cc5 JK |
454 | |
455 | blk_start = pg_start << PAGE_CACHE_SHIFT; | |
456 | blk_end = pg_end << PAGE_CACHE_SHIFT; | |
457 | truncate_inode_pages_range(mapping, blk_start, | |
458 | blk_end - 1); | |
39936837 JK |
459 | |
460 | ilock = mutex_lock_op(sbi); | |
fbfa2cc5 | 461 | ret = truncate_hole(inode, pg_start, pg_end); |
39936837 | 462 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
463 | } |
464 | } | |
465 | ||
466 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
467 | i_size_read(inode) <= (offset + len)) { | |
468 | i_size_write(inode, offset); | |
469 | mark_inode_dirty(inode); | |
470 | } | |
471 | ||
472 | return ret; | |
473 | } | |
474 | ||
475 | static int expand_inode_data(struct inode *inode, loff_t offset, | |
476 | loff_t len, int mode) | |
477 | { | |
478 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
479 | pgoff_t index, pg_start, pg_end; | |
480 | loff_t new_size = i_size_read(inode); | |
481 | loff_t off_start, off_end; | |
482 | int ret = 0; | |
483 | ||
484 | ret = inode_newsize_ok(inode, (len + offset)); | |
485 | if (ret) | |
486 | return ret; | |
487 | ||
488 | pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT; | |
489 | pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT; | |
490 | ||
491 | off_start = offset & (PAGE_CACHE_SIZE - 1); | |
492 | off_end = (offset + len) & (PAGE_CACHE_SIZE - 1); | |
493 | ||
494 | for (index = pg_start; index <= pg_end; index++) { | |
495 | struct dnode_of_data dn; | |
39936837 | 496 | int ilock; |
fbfa2cc5 | 497 | |
39936837 | 498 | ilock = mutex_lock_op(sbi); |
fbfa2cc5 | 499 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 500 | ret = get_dnode_of_data(&dn, index, ALLOC_NODE); |
fbfa2cc5 | 501 | if (ret) { |
39936837 | 502 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
503 | break; |
504 | } | |
505 | ||
506 | if (dn.data_blkaddr == NULL_ADDR) { | |
507 | ret = reserve_new_block(&dn); | |
508 | if (ret) { | |
509 | f2fs_put_dnode(&dn); | |
39936837 | 510 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
511 | break; |
512 | } | |
513 | } | |
514 | f2fs_put_dnode(&dn); | |
39936837 | 515 | mutex_unlock_op(sbi, ilock); |
fbfa2cc5 JK |
516 | |
517 | if (pg_start == pg_end) | |
518 | new_size = offset + len; | |
519 | else if (index == pg_start && off_start) | |
520 | new_size = (index + 1) << PAGE_CACHE_SHIFT; | |
521 | else if (index == pg_end) | |
522 | new_size = (index << PAGE_CACHE_SHIFT) + off_end; | |
523 | else | |
524 | new_size += PAGE_CACHE_SIZE; | |
525 | } | |
526 | ||
527 | if (!(mode & FALLOC_FL_KEEP_SIZE) && | |
528 | i_size_read(inode) < new_size) { | |
529 | i_size_write(inode, new_size); | |
530 | mark_inode_dirty(inode); | |
531 | } | |
532 | ||
533 | return ret; | |
534 | } | |
535 | ||
536 | static long f2fs_fallocate(struct file *file, int mode, | |
537 | loff_t offset, loff_t len) | |
538 | { | |
6131ffaa | 539 | struct inode *inode = file_inode(file); |
fbfa2cc5 JK |
540 | long ret; |
541 | ||
542 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) | |
543 | return -EOPNOTSUPP; | |
544 | ||
545 | if (mode & FALLOC_FL_PUNCH_HOLE) | |
546 | ret = punch_hole(inode, offset, len, mode); | |
547 | else | |
548 | ret = expand_inode_data(inode, offset, len, mode); | |
549 | ||
3af60a49 NJ |
550 | if (!ret) { |
551 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
552 | mark_inode_dirty(inode); | |
553 | } | |
c01e2853 | 554 | trace_f2fs_fallocate(inode, mode, offset, len, ret); |
fbfa2cc5 JK |
555 | return ret; |
556 | } | |
557 | ||
558 | #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) | |
559 | #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) | |
560 | ||
561 | static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags) | |
562 | { | |
563 | if (S_ISDIR(mode)) | |
564 | return flags; | |
565 | else if (S_ISREG(mode)) | |
566 | return flags & F2FS_REG_FLMASK; | |
567 | else | |
568 | return flags & F2FS_OTHER_FLMASK; | |
569 | } | |
570 | ||
571 | long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
572 | { | |
6131ffaa | 573 | struct inode *inode = file_inode(filp); |
fbfa2cc5 JK |
574 | struct f2fs_inode_info *fi = F2FS_I(inode); |
575 | unsigned int flags; | |
576 | int ret; | |
577 | ||
578 | switch (cmd) { | |
6a3e8ef0 | 579 | case F2FS_IOC_GETFLAGS: |
fbfa2cc5 JK |
580 | flags = fi->i_flags & FS_FL_USER_VISIBLE; |
581 | return put_user(flags, (int __user *) arg); | |
6a3e8ef0 | 582 | case F2FS_IOC_SETFLAGS: |
fbfa2cc5 JK |
583 | { |
584 | unsigned int oldflags; | |
585 | ||
bdaec334 | 586 | ret = mnt_want_write_file(filp); |
fbfa2cc5 JK |
587 | if (ret) |
588 | return ret; | |
589 | ||
590 | if (!inode_owner_or_capable(inode)) { | |
591 | ret = -EACCES; | |
592 | goto out; | |
593 | } | |
594 | ||
595 | if (get_user(flags, (int __user *) arg)) { | |
596 | ret = -EFAULT; | |
597 | goto out; | |
598 | } | |
599 | ||
600 | flags = f2fs_mask_flags(inode->i_mode, flags); | |
601 | ||
602 | mutex_lock(&inode->i_mutex); | |
603 | ||
604 | oldflags = fi->i_flags; | |
605 | ||
606 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { | |
607 | if (!capable(CAP_LINUX_IMMUTABLE)) { | |
608 | mutex_unlock(&inode->i_mutex); | |
609 | ret = -EPERM; | |
610 | goto out; | |
611 | } | |
612 | } | |
613 | ||
614 | flags = flags & FS_FL_USER_MODIFIABLE; | |
615 | flags |= oldflags & ~FS_FL_USER_MODIFIABLE; | |
616 | fi->i_flags = flags; | |
617 | mutex_unlock(&inode->i_mutex); | |
618 | ||
619 | f2fs_set_inode_flags(inode); | |
620 | inode->i_ctime = CURRENT_TIME; | |
621 | mark_inode_dirty(inode); | |
622 | out: | |
bdaec334 | 623 | mnt_drop_write_file(filp); |
fbfa2cc5 JK |
624 | return ret; |
625 | } | |
626 | default: | |
627 | return -ENOTTY; | |
628 | } | |
629 | } | |
630 | ||
e9750824 NJ |
631 | #ifdef CONFIG_COMPAT |
632 | long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
633 | { | |
634 | switch (cmd) { | |
635 | case F2FS_IOC32_GETFLAGS: | |
636 | cmd = F2FS_IOC_GETFLAGS; | |
637 | break; | |
638 | case F2FS_IOC32_SETFLAGS: | |
639 | cmd = F2FS_IOC_SETFLAGS; | |
640 | break; | |
641 | default: | |
642 | return -ENOIOCTLCMD; | |
643 | } | |
644 | return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); | |
645 | } | |
646 | #endif | |
647 | ||
fbfa2cc5 JK |
648 | const struct file_operations f2fs_file_operations = { |
649 | .llseek = generic_file_llseek, | |
650 | .read = do_sync_read, | |
651 | .write = do_sync_write, | |
652 | .aio_read = generic_file_aio_read, | |
653 | .aio_write = generic_file_aio_write, | |
654 | .open = generic_file_open, | |
655 | .mmap = f2fs_file_mmap, | |
656 | .fsync = f2fs_sync_file, | |
657 | .fallocate = f2fs_fallocate, | |
658 | .unlocked_ioctl = f2fs_ioctl, | |
e9750824 NJ |
659 | #ifdef CONFIG_COMPAT |
660 | .compat_ioctl = f2fs_compat_ioctl, | |
661 | #endif | |
fbfa2cc5 JK |
662 | .splice_read = generic_file_splice_read, |
663 | .splice_write = generic_file_splice_write, | |
664 | }; |