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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
503f82a9 | 3 | #include <linux/ceph/striper.h> |
124e68e7 | 4 | |
3d14c5d2 | 5 | #include <linux/module.h> |
124e68e7 | 6 | #include <linux/sched.h> |
5a0e3ad6 | 7 | #include <linux/slab.h> |
124e68e7 | 8 | #include <linux/file.h> |
5ef50c3b | 9 | #include <linux/mount.h> |
124e68e7 SW |
10 | #include <linux/namei.h> |
11 | #include <linux/writeback.h> | |
ad7a60de | 12 | #include <linux/falloc.h> |
5c308356 | 13 | #include <linux/iversion.h> |
124e68e7 SW |
14 | |
15 | #include "super.h" | |
16 | #include "mds_client.h" | |
99ccbd22 | 17 | #include "cache.h" |
321fe13c | 18 | #include "io.h" |
124e68e7 | 19 | |
f775ff7d AG |
20 | static __le32 ceph_flags_sys2wire(u32 flags) |
21 | { | |
22 | u32 wire_flags = 0; | |
23 | ||
24 | switch (flags & O_ACCMODE) { | |
25 | case O_RDONLY: | |
26 | wire_flags |= CEPH_O_RDONLY; | |
27 | break; | |
28 | case O_WRONLY: | |
29 | wire_flags |= CEPH_O_WRONLY; | |
30 | break; | |
31 | case O_RDWR: | |
32 | wire_flags |= CEPH_O_RDWR; | |
33 | break; | |
34 | } | |
35 | ||
51b10f3f CX |
36 | flags &= ~O_ACCMODE; |
37 | ||
f775ff7d AG |
38 | #define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; } |
39 | ||
40 | ceph_sys2wire(O_CREAT); | |
41 | ceph_sys2wire(O_EXCL); | |
42 | ceph_sys2wire(O_TRUNC); | |
43 | ceph_sys2wire(O_DIRECTORY); | |
44 | ceph_sys2wire(O_NOFOLLOW); | |
45 | ||
46 | #undef ceph_sys2wire | |
47 | ||
48 | if (flags) | |
4c069a58 | 49 | dout("unused open flags: %x\n", flags); |
f775ff7d AG |
50 | |
51 | return cpu_to_le32(wire_flags); | |
52 | } | |
53 | ||
124e68e7 SW |
54 | /* |
55 | * Ceph file operations | |
56 | * | |
57 | * Implement basic open/close functionality, and implement | |
58 | * read/write. | |
59 | * | |
60 | * We implement three modes of file I/O: | |
61 | * - buffered uses the generic_file_aio_{read,write} helpers | |
62 | * | |
63 | * - synchronous is used when there is multi-client read/write | |
64 | * sharing, avoids the page cache, and synchronously waits for an | |
65 | * ack from the OSD. | |
66 | * | |
67 | * - direct io takes the variant of the sync path that references | |
68 | * user pages directly. | |
69 | * | |
70 | * fsync() flushes and waits on dirty pages, but just queues metadata | |
71 | * for writeback: since the MDS can recover size and mtime there is no | |
72 | * need to wait for MDS acknowledgement. | |
73 | */ | |
74 | ||
b5b98989 | 75 | /* |
fc218544 ID |
76 | * How many pages to get in one call to iov_iter_get_pages(). This |
77 | * determines the size of the on-stack array used as a buffer. | |
b5b98989 | 78 | */ |
fc218544 ID |
79 | #define ITER_GET_BVECS_PAGES 64 |
80 | ||
81 | static ssize_t __iter_get_bvecs(struct iov_iter *iter, size_t maxsize, | |
82 | struct bio_vec *bvecs) | |
b5b98989 | 83 | { |
fc218544 ID |
84 | size_t size = 0; |
85 | int bvec_idx = 0; | |
86 | ||
87 | if (maxsize > iov_iter_count(iter)) | |
88 | maxsize = iov_iter_count(iter); | |
89 | ||
90 | while (size < maxsize) { | |
91 | struct page *pages[ITER_GET_BVECS_PAGES]; | |
92 | ssize_t bytes; | |
93 | size_t start; | |
94 | int idx = 0; | |
95 | ||
96 | bytes = iov_iter_get_pages(iter, pages, maxsize - size, | |
97 | ITER_GET_BVECS_PAGES, &start); | |
98 | if (bytes < 0) | |
99 | return size ?: bytes; | |
100 | ||
101 | iov_iter_advance(iter, bytes); | |
102 | size += bytes; | |
103 | ||
104 | for ( ; bytes; idx++, bvec_idx++) { | |
105 | struct bio_vec bv = { | |
106 | .bv_page = pages[idx], | |
107 | .bv_len = min_t(int, bytes, PAGE_SIZE - start), | |
108 | .bv_offset = start, | |
109 | }; | |
110 | ||
111 | bvecs[bvec_idx] = bv; | |
112 | bytes -= bv.bv_len; | |
113 | start = 0; | |
114 | } | |
115 | } | |
116 | ||
117 | return size; | |
b5b98989 ZC |
118 | } |
119 | ||
120 | /* | |
fc218544 ID |
121 | * iov_iter_get_pages() only considers one iov_iter segment, no matter |
122 | * what maxsize or maxpages are given. For ITER_BVEC that is a single | |
123 | * page. | |
124 | * | |
125 | * Attempt to get up to @maxsize bytes worth of pages from @iter. | |
126 | * Return the number of bytes in the created bio_vec array, or an error. | |
b5b98989 | 127 | */ |
fc218544 ID |
128 | static ssize_t iter_get_bvecs_alloc(struct iov_iter *iter, size_t maxsize, |
129 | struct bio_vec **bvecs, int *num_bvecs) | |
b5b98989 | 130 | { |
fc218544 ID |
131 | struct bio_vec *bv; |
132 | size_t orig_count = iov_iter_count(iter); | |
133 | ssize_t bytes; | |
134 | int npages; | |
b5b98989 | 135 | |
fc218544 ID |
136 | iov_iter_truncate(iter, maxsize); |
137 | npages = iov_iter_npages(iter, INT_MAX); | |
138 | iov_iter_reexpand(iter, orig_count); | |
b5b98989 | 139 | |
fc218544 ID |
140 | /* |
141 | * __iter_get_bvecs() may populate only part of the array -- zero it | |
142 | * out. | |
143 | */ | |
144 | bv = kvmalloc_array(npages, sizeof(*bv), GFP_KERNEL | __GFP_ZERO); | |
145 | if (!bv) | |
146 | return -ENOMEM; | |
b5b98989 | 147 | |
fc218544 ID |
148 | bytes = __iter_get_bvecs(iter, maxsize, bv); |
149 | if (bytes < 0) { | |
150 | /* | |
151 | * No pages were pinned -- just free the array. | |
152 | */ | |
153 | kvfree(bv); | |
154 | return bytes; | |
b5b98989 ZC |
155 | } |
156 | ||
fc218544 ID |
157 | *bvecs = bv; |
158 | *num_bvecs = npages; | |
159 | return bytes; | |
160 | } | |
161 | ||
162 | static void put_bvecs(struct bio_vec *bvecs, int num_bvecs, bool should_dirty) | |
163 | { | |
164 | int i; | |
165 | ||
166 | for (i = 0; i < num_bvecs; i++) { | |
167 | if (bvecs[i].bv_page) { | |
168 | if (should_dirty) | |
169 | set_page_dirty_lock(bvecs[i].bv_page); | |
170 | put_page(bvecs[i].bv_page); | |
171 | } | |
172 | } | |
173 | kvfree(bvecs); | |
b5b98989 | 174 | } |
124e68e7 SW |
175 | |
176 | /* | |
177 | * Prepare an open request. Preallocate ceph_cap to avoid an | |
178 | * inopportune ENOMEM later. | |
179 | */ | |
180 | static struct ceph_mds_request * | |
181 | prepare_open_request(struct super_block *sb, int flags, int create_mode) | |
182 | { | |
3d14c5d2 YS |
183 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
184 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
124e68e7 SW |
185 | struct ceph_mds_request *req; |
186 | int want_auth = USE_ANY_MDS; | |
187 | int op = (flags & O_CREAT) ? CEPH_MDS_OP_CREATE : CEPH_MDS_OP_OPEN; | |
188 | ||
189 | if (flags & (O_WRONLY|O_RDWR|O_CREAT|O_TRUNC)) | |
190 | want_auth = USE_AUTH_MDS; | |
191 | ||
192 | req = ceph_mdsc_create_request(mdsc, op, want_auth); | |
193 | if (IS_ERR(req)) | |
194 | goto out; | |
195 | req->r_fmode = ceph_flags_to_mode(flags); | |
f775ff7d | 196 | req->r_args.open.flags = ceph_flags_sys2wire(flags); |
124e68e7 | 197 | req->r_args.open.mode = cpu_to_le32(create_mode); |
124e68e7 SW |
198 | out: |
199 | return req; | |
200 | } | |
201 | ||
bb48bd4d CX |
202 | static int ceph_init_file_info(struct inode *inode, struct file *file, |
203 | int fmode, bool isdir) | |
204 | { | |
f4b97866 | 205 | struct ceph_inode_info *ci = ceph_inode(inode); |
bb48bd4d CX |
206 | struct ceph_file_info *fi; |
207 | ||
208 | dout("%s %p %p 0%o (%s)\n", __func__, inode, file, | |
209 | inode->i_mode, isdir ? "dir" : "regular"); | |
210 | BUG_ON(inode->i_fop->release != ceph_release); | |
211 | ||
212 | if (isdir) { | |
213 | struct ceph_dir_file_info *dfi = | |
214 | kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL); | |
215 | if (!dfi) { | |
f4b97866 | 216 | ceph_put_fmode(ci, fmode); /* clean up */ |
bb48bd4d CX |
217 | return -ENOMEM; |
218 | } | |
219 | ||
220 | file->private_data = dfi; | |
221 | fi = &dfi->file_info; | |
222 | dfi->next_offset = 2; | |
223 | dfi->readdir_cache_idx = -1; | |
224 | } else { | |
225 | fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL); | |
226 | if (!fi) { | |
f4b97866 | 227 | ceph_put_fmode(ci, fmode); /* clean up */ |
bb48bd4d CX |
228 | return -ENOMEM; |
229 | } | |
230 | ||
231 | file->private_data = fi; | |
232 | } | |
233 | ||
234 | fi->fmode = fmode; | |
235 | spin_lock_init(&fi->rw_contexts_lock); | |
236 | INIT_LIST_HEAD(&fi->rw_contexts); | |
f4b97866 | 237 | fi->meta_err = errseq_sample(&ci->i_meta_err); |
81f148a9 | 238 | fi->filp_gen = READ_ONCE(ceph_inode_to_client(inode)->filp_gen); |
bb48bd4d CX |
239 | |
240 | return 0; | |
241 | } | |
242 | ||
124e68e7 SW |
243 | /* |
244 | * initialize private struct file data. | |
245 | * if we fail, clean up by dropping fmode reference on the ceph_inode | |
246 | */ | |
247 | static int ceph_init_file(struct inode *inode, struct file *file, int fmode) | |
248 | { | |
124e68e7 SW |
249 | int ret = 0; |
250 | ||
251 | switch (inode->i_mode & S_IFMT) { | |
252 | case S_IFREG: | |
46b59b2b YZ |
253 | ceph_fscache_register_inode_cookie(inode); |
254 | ceph_fscache_file_set_cookie(inode, file); | |
0a4c9265 | 255 | /* fall through */ |
124e68e7 | 256 | case S_IFDIR: |
bb48bd4d CX |
257 | ret = ceph_init_file_info(inode, file, fmode, |
258 | S_ISDIR(inode->i_mode)); | |
259 | if (ret) | |
260 | return ret; | |
124e68e7 SW |
261 | break; |
262 | ||
263 | case S_IFLNK: | |
264 | dout("init_file %p %p 0%o (symlink)\n", inode, file, | |
265 | inode->i_mode); | |
266 | ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */ | |
267 | break; | |
268 | ||
269 | default: | |
270 | dout("init_file %p %p 0%o (special)\n", inode, file, | |
271 | inode->i_mode); | |
272 | /* | |
273 | * we need to drop the open ref now, since we don't | |
274 | * have .release set to ceph_release. | |
275 | */ | |
276 | ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */ | |
277 | BUG_ON(inode->i_fop->release == ceph_release); | |
278 | ||
279 | /* call the proper open fop */ | |
280 | ret = inode->i_fop->open(inode, file); | |
281 | } | |
282 | return ret; | |
283 | } | |
284 | ||
77310320 YZ |
285 | /* |
286 | * try renew caps after session gets killed. | |
287 | */ | |
288 | int ceph_renew_caps(struct inode *inode) | |
289 | { | |
290 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; | |
291 | struct ceph_inode_info *ci = ceph_inode(inode); | |
292 | struct ceph_mds_request *req; | |
293 | int err, flags, wanted; | |
294 | ||
295 | spin_lock(&ci->i_ceph_lock); | |
296 | wanted = __ceph_caps_file_wanted(ci); | |
297 | if (__ceph_is_any_real_caps(ci) && | |
8242c9f3 | 298 | (!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) { |
77310320 YZ |
299 | int issued = __ceph_caps_issued(ci, NULL); |
300 | spin_unlock(&ci->i_ceph_lock); | |
301 | dout("renew caps %p want %s issued %s updating mds_wanted\n", | |
302 | inode, ceph_cap_string(wanted), ceph_cap_string(issued)); | |
303 | ceph_check_caps(ci, 0, NULL); | |
304 | return 0; | |
305 | } | |
306 | spin_unlock(&ci->i_ceph_lock); | |
307 | ||
308 | flags = 0; | |
309 | if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR)) | |
310 | flags = O_RDWR; | |
311 | else if (wanted & CEPH_CAP_FILE_RD) | |
312 | flags = O_RDONLY; | |
313 | else if (wanted & CEPH_CAP_FILE_WR) | |
314 | flags = O_WRONLY; | |
315 | #ifdef O_LAZY | |
316 | if (wanted & CEPH_CAP_FILE_LAZYIO) | |
317 | flags |= O_LAZY; | |
318 | #endif | |
319 | ||
320 | req = prepare_open_request(inode->i_sb, flags, 0); | |
321 | if (IS_ERR(req)) { | |
322 | err = PTR_ERR(req); | |
323 | goto out; | |
324 | } | |
325 | ||
326 | req->r_inode = inode; | |
327 | ihold(inode); | |
328 | req->r_num_caps = 1; | |
329 | req->r_fmode = -1; | |
330 | ||
331 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
332 | ceph_mdsc_put_request(req); | |
333 | out: | |
334 | dout("renew caps %p open result=%d\n", inode, err); | |
335 | return err < 0 ? err : 0; | |
336 | } | |
337 | ||
124e68e7 | 338 | /* |
124e68e7 SW |
339 | * If we already have the requisite capabilities, we can satisfy |
340 | * the open request locally (no need to request new caps from the | |
341 | * MDS). We do, however, need to inform the MDS (asynchronously) | |
342 | * if our wanted caps set expands. | |
343 | */ | |
344 | int ceph_open(struct inode *inode, struct file *file) | |
345 | { | |
346 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3d14c5d2 YS |
347 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
348 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
124e68e7 | 349 | struct ceph_mds_request *req; |
73737682 | 350 | struct ceph_file_info *fi = file->private_data; |
124e68e7 SW |
351 | int err; |
352 | int flags, fmode, wanted; | |
353 | ||
73737682 | 354 | if (fi) { |
124e68e7 SW |
355 | dout("open file %p is already opened\n", file); |
356 | return 0; | |
357 | } | |
358 | ||
359 | /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */ | |
360 | flags = file->f_flags & ~(O_CREAT|O_EXCL); | |
361 | if (S_ISDIR(inode->i_mode)) | |
362 | flags = O_DIRECTORY; /* mds likes to know */ | |
363 | ||
364 | dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode, | |
365 | ceph_vinop(inode), file, flags, file->f_flags); | |
366 | fmode = ceph_flags_to_mode(flags); | |
367 | wanted = ceph_caps_for_mode(fmode); | |
368 | ||
369 | /* snapped files are read-only */ | |
370 | if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE)) | |
371 | return -EROFS; | |
372 | ||
373 | /* trivially open snapdir */ | |
374 | if (ceph_snap(inode) == CEPH_SNAPDIR) { | |
be655596 | 375 | spin_lock(&ci->i_ceph_lock); |
124e68e7 | 376 | __ceph_get_fmode(ci, fmode); |
be655596 | 377 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
378 | return ceph_init_file(inode, file, fmode); |
379 | } | |
380 | ||
381 | /* | |
7421ab80 SW |
382 | * No need to block if we have caps on the auth MDS (for |
383 | * write) or any MDS (for read). Update wanted set | |
124e68e7 SW |
384 | * asynchronously. |
385 | */ | |
be655596 | 386 | spin_lock(&ci->i_ceph_lock); |
7421ab80 SW |
387 | if (__ceph_is_any_real_caps(ci) && |
388 | (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) { | |
c1944fed | 389 | int mds_wanted = __ceph_caps_mds_wanted(ci, true); |
124e68e7 SW |
390 | int issued = __ceph_caps_issued(ci, NULL); |
391 | ||
392 | dout("open %p fmode %d want %s issued %s using existing\n", | |
393 | inode, fmode, ceph_cap_string(wanted), | |
394 | ceph_cap_string(issued)); | |
395 | __ceph_get_fmode(ci, fmode); | |
be655596 | 396 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
397 | |
398 | /* adjust wanted? */ | |
399 | if ((issued & wanted) != wanted && | |
400 | (mds_wanted & wanted) != wanted && | |
401 | ceph_snap(inode) != CEPH_SNAPDIR) | |
402 | ceph_check_caps(ci, 0, NULL); | |
403 | ||
404 | return ceph_init_file(inode, file, fmode); | |
405 | } else if (ceph_snap(inode) != CEPH_NOSNAP && | |
406 | (ci->i_snap_caps & wanted) == wanted) { | |
407 | __ceph_get_fmode(ci, fmode); | |
be655596 | 408 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
409 | return ceph_init_file(inode, file, fmode); |
410 | } | |
99ccbd22 | 411 | |
be655596 | 412 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
413 | |
414 | dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted)); | |
415 | req = prepare_open_request(inode->i_sb, flags, 0); | |
416 | if (IS_ERR(req)) { | |
417 | err = PTR_ERR(req); | |
418 | goto out; | |
419 | } | |
70b666c3 SW |
420 | req->r_inode = inode; |
421 | ihold(inode); | |
99ccbd22 | 422 | |
124e68e7 | 423 | req->r_num_caps = 1; |
e36d571d | 424 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
124e68e7 SW |
425 | if (!err) |
426 | err = ceph_init_file(inode, file, req->r_fmode); | |
427 | ceph_mdsc_put_request(req); | |
428 | dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode)); | |
429 | out: | |
430 | return err; | |
431 | } | |
432 | ||
433 | ||
434 | /* | |
5ef50c3b SW |
435 | * Do a lookup + open with a single request. If we get a non-existent |
436 | * file or symlink, return 1 so the VFS can retry. | |
124e68e7 | 437 | */ |
5ef50c3b | 438 | int ceph_atomic_open(struct inode *dir, struct dentry *dentry, |
44907d79 | 439 | struct file *file, unsigned flags, umode_t mode) |
124e68e7 | 440 | { |
3d14c5d2 YS |
441 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
442 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
124e68e7 | 443 | struct ceph_mds_request *req; |
5ef50c3b | 444 | struct dentry *dn; |
5c31e92d | 445 | struct ceph_acl_sec_ctx as_ctx = {}; |
b7a29217 | 446 | int mask; |
124e68e7 | 447 | int err; |
124e68e7 | 448 | |
a455589f AV |
449 | dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n", |
450 | dir, dentry, dentry, | |
5ef50c3b SW |
451 | d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode); |
452 | ||
453 | if (dentry->d_name.len > NAME_MAX) | |
454 | return -ENAMETOOLONG; | |
455 | ||
b1ee94aa | 456 | if (flags & O_CREAT) { |
b7a29217 LH |
457 | if (ceph_quota_is_max_files_exceeded(dir)) |
458 | return -EDQUOT; | |
5c31e92d | 459 | err = ceph_pre_init_acls(dir, &mode, &as_ctx); |
b1ee94aa YZ |
460 | if (err < 0) |
461 | return err; | |
ac6713cc YZ |
462 | err = ceph_security_init_secctx(dentry, mode, &as_ctx); |
463 | if (err < 0) | |
464 | goto out_ctx; | |
5bb5e6ee JL |
465 | } else if (!d_in_lookup(dentry)) { |
466 | /* If it's not being looked up, it's negative */ | |
467 | return -ENOENT; | |
b1ee94aa YZ |
468 | } |
469 | ||
124e68e7 SW |
470 | /* do the open */ |
471 | req = prepare_open_request(dir->i_sb, flags, mode); | |
b1ee94aa YZ |
472 | if (IS_ERR(req)) { |
473 | err = PTR_ERR(req); | |
5c31e92d | 474 | goto out_ctx; |
b1ee94aa | 475 | } |
124e68e7 SW |
476 | req->r_dentry = dget(dentry); |
477 | req->r_num_caps = 2; | |
478 | if (flags & O_CREAT) { | |
222b7f90 | 479 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL; |
124e68e7 | 480 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |
5c31e92d YZ |
481 | if (as_ctx.pagelist) { |
482 | req->r_pagelist = as_ctx.pagelist; | |
483 | as_ctx.pagelist = NULL; | |
b1ee94aa | 484 | } |
124e68e7 | 485 | } |
315f2408 YZ |
486 | |
487 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; | |
488 | if (ceph_security_xattr_wanted(dir)) | |
489 | mask |= CEPH_CAP_XATTR_SHARED; | |
490 | req->r_args.open.mask = cpu_to_le32(mask); | |
491 | ||
3dd69aab JL |
492 | req->r_parent = dir; |
493 | set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); | |
acda7657 SW |
494 | err = ceph_mdsc_do_request(mdsc, |
495 | (flags & (O_CREAT|O_TRUNC)) ? dir : NULL, | |
496 | req); | |
bf91c315 | 497 | err = ceph_handle_snapdir(req, dentry, err); |
79aec984 | 498 | if (err) |
b1ee94aa | 499 | goto out_req; |
79aec984 | 500 | |
a43137f7 | 501 | if ((flags & O_CREAT) && !req->r_reply_info.head->is_dentry) |
124e68e7 | 502 | err = ceph_handle_notrace_create(dir, dentry); |
2d83bde9 | 503 | |
00699ad8 | 504 | if (d_in_lookup(dentry)) { |
5ef50c3b SW |
505 | dn = ceph_finish_lookup(req, dentry, err); |
506 | if (IS_ERR(dn)) | |
507 | err = PTR_ERR(dn); | |
508 | } else { | |
509 | /* we were given a hashed negative dentry */ | |
510 | dn = NULL; | |
511 | } | |
512 | if (err) | |
b1ee94aa | 513 | goto out_req; |
2b0143b5 | 514 | if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) { |
5ef50c3b SW |
515 | /* make vfs retry on splice, ENOENT, or symlink */ |
516 | dout("atomic_open finish_no_open on dn %p\n", dn); | |
517 | err = finish_no_open(file, dn); | |
518 | } else { | |
519 | dout("atomic_open finish_open on dn %p\n", dn); | |
6e8575fa | 520 | if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) { |
5c31e92d | 521 | ceph_init_inode_acls(d_inode(dentry), &as_ctx); |
73a09dd9 | 522 | file->f_mode |= FMODE_CREATED; |
6e8575fa | 523 | } |
be12af3e | 524 | err = finish_open(file, dentry, ceph_open); |
5ef50c3b | 525 | } |
b1ee94aa | 526 | out_req: |
ab866549 YZ |
527 | if (!req->r_err && req->r_target_inode) |
528 | ceph_put_fmode(ceph_inode(req->r_target_inode), req->r_fmode); | |
5ef50c3b | 529 | ceph_mdsc_put_request(req); |
5c31e92d YZ |
530 | out_ctx: |
531 | ceph_release_acl_sec_ctx(&as_ctx); | |
5ef50c3b | 532 | dout("atomic_open result=%d\n", err); |
d9585277 | 533 | return err; |
124e68e7 SW |
534 | } |
535 | ||
536 | int ceph_release(struct inode *inode, struct file *file) | |
537 | { | |
538 | struct ceph_inode_info *ci = ceph_inode(inode); | |
124e68e7 | 539 | |
bb48bd4d CX |
540 | if (S_ISDIR(inode->i_mode)) { |
541 | struct ceph_dir_file_info *dfi = file->private_data; | |
542 | dout("release inode %p dir file %p\n", inode, file); | |
543 | WARN_ON(!list_empty(&dfi->file_info.rw_contexts)); | |
544 | ||
545 | ceph_put_fmode(ci, dfi->file_info.fmode); | |
546 | ||
547 | if (dfi->last_readdir) | |
548 | ceph_mdsc_put_request(dfi->last_readdir); | |
549 | kfree(dfi->last_name); | |
550 | kfree(dfi->dir_info); | |
551 | kmem_cache_free(ceph_dir_file_cachep, dfi); | |
552 | } else { | |
553 | struct ceph_file_info *fi = file->private_data; | |
554 | dout("release inode %p regular file %p\n", inode, file); | |
555 | WARN_ON(!list_empty(&fi->rw_contexts)); | |
556 | ||
557 | ceph_put_fmode(ci, fi->fmode); | |
558 | kmem_cache_free(ceph_file_cachep, fi); | |
559 | } | |
195d3ce2 SW |
560 | |
561 | /* wake up anyone waiting for caps on this inode */ | |
03066f23 | 562 | wake_up_all(&ci->i_cap_wq); |
124e68e7 SW |
563 | return 0; |
564 | } | |
565 | ||
83701246 | 566 | enum { |
c8fe9b17 YZ |
567 | HAVE_RETRIED = 1, |
568 | CHECK_EOF = 2, | |
569 | READ_INLINE = 3, | |
83701246 YZ |
570 | }; |
571 | ||
124e68e7 SW |
572 | /* |
573 | * Completely synchronous read and write methods. Direct from __user | |
574 | * buffer to osd, or directly to user pages (if O_DIRECT). | |
575 | * | |
fce7a974 YZ |
576 | * If the read spans object boundary, just do multiple reads. (That's not |
577 | * atomic, but good enough for now.) | |
578 | * | |
579 | * If we get a short result from the OSD, check against i_size; we need to | |
580 | * only return a short read to the caller if we hit EOF. | |
124e68e7 | 581 | */ |
7ce469a5 | 582 | static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to, |
fce7a974 | 583 | int *retry_op) |
124e68e7 | 584 | { |
8eb4efb0 | 585 | struct file *file = iocb->ki_filp; |
496ad9aa | 586 | struct inode *inode = file_inode(file); |
fce7a974 YZ |
587 | struct ceph_inode_info *ci = ceph_inode(inode); |
588 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
589 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
7ce469a5 | 590 | ssize_t ret; |
fce7a974 YZ |
591 | u64 off = iocb->ki_pos; |
592 | u64 len = iov_iter_count(to); | |
124e68e7 | 593 | |
1c0a9c2d | 594 | dout("sync_read on file %p %llu~%u %s\n", file, off, (unsigned)len, |
124e68e7 | 595 | (file->f_flags & O_DIRECT) ? "O_DIRECT" : ""); |
d0d0db22 YZ |
596 | |
597 | if (!len) | |
598 | return 0; | |
e98b6fed SW |
599 | /* |
600 | * flush any page cache pages in this range. this | |
601 | * will make concurrent normal and sync io slow, | |
602 | * but it will at least behave sensibly when they are | |
603 | * in sequence. | |
604 | */ | |
e450f4d1 | 605 | ret = filemap_write_and_wait_range(inode->i_mapping, |
606 | off, off + len - 1); | |
29065a51 | 607 | if (ret < 0) |
8eb4efb0 | 608 | return ret; |
29065a51 | 609 | |
fce7a974 YZ |
610 | ret = 0; |
611 | while ((len = iov_iter_count(to)) > 0) { | |
612 | struct ceph_osd_request *req; | |
613 | struct page **pages; | |
614 | int num_pages; | |
7ce469a5 | 615 | size_t page_off; |
fce7a974 YZ |
616 | u64 i_size; |
617 | bool more; | |
618 | ||
619 | req = ceph_osdc_new_request(osdc, &ci->i_layout, | |
620 | ci->i_vino, off, &len, 0, 1, | |
621 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
622 | NULL, ci->i_truncate_seq, | |
623 | ci->i_truncate_size, false); | |
624 | if (IS_ERR(req)) { | |
625 | ret = PTR_ERR(req); | |
626 | break; | |
627 | } | |
7ce469a5 | 628 | |
fce7a974 YZ |
629 | more = len < iov_iter_count(to); |
630 | ||
9931a07d | 631 | if (unlikely(iov_iter_is_pipe(to))) { |
fce7a974 YZ |
632 | ret = iov_iter_get_pages_alloc(to, &pages, len, |
633 | &page_off); | |
634 | if (ret <= 0) { | |
635 | ceph_osdc_put_request(req); | |
636 | ret = -ENOMEM; | |
637 | break; | |
638 | } | |
639 | num_pages = DIV_ROUND_UP(ret + page_off, PAGE_SIZE); | |
640 | if (ret < len) { | |
641 | len = ret; | |
642 | osd_req_op_extent_update(req, 0, len); | |
643 | more = false; | |
644 | } | |
7ce469a5 | 645 | } else { |
fce7a974 YZ |
646 | num_pages = calc_pages_for(off, len); |
647 | page_off = off & ~PAGE_MASK; | |
648 | pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); | |
649 | if (IS_ERR(pages)) { | |
650 | ceph_osdc_put_request(req); | |
651 | ret = PTR_ERR(pages); | |
652 | break; | |
653 | } | |
7ce469a5 | 654 | } |
fce7a974 YZ |
655 | |
656 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_off, | |
657 | false, false); | |
658 | ret = ceph_osdc_start_request(osdc, req, false); | |
659 | if (!ret) | |
660 | ret = ceph_osdc_wait_request(osdc, req); | |
661 | ceph_osdc_put_request(req); | |
662 | ||
663 | i_size = i_size_read(inode); | |
664 | dout("sync_read %llu~%llu got %zd i_size %llu%s\n", | |
665 | off, len, ret, i_size, (more ? " MORE" : "")); | |
666 | ||
667 | if (ret == -ENOENT) | |
668 | ret = 0; | |
669 | if (ret >= 0 && ret < len && (off + ret < i_size)) { | |
670 | int zlen = min(len - ret, i_size - off - ret); | |
671 | int zoff = page_off + ret; | |
672 | dout("sync_read zero gap %llu~%llu\n", | |
673 | off + ret, off + ret + zlen); | |
674 | ceph_zero_page_vector_range(zoff, zlen, pages); | |
675 | ret += zlen; | |
676 | } | |
677 | ||
9931a07d | 678 | if (unlikely(iov_iter_is_pipe(to))) { |
fce7a974 YZ |
679 | if (ret > 0) { |
680 | iov_iter_advance(to, ret); | |
681 | off += ret; | |
682 | } else { | |
683 | iov_iter_advance(to, 0); | |
684 | } | |
685 | ceph_put_page_vector(pages, num_pages, false); | |
686 | } else { | |
687 | int idx = 0; | |
688 | size_t left = ret > 0 ? ret : 0; | |
689 | while (left > 0) { | |
690 | size_t len, copied; | |
691 | page_off = off & ~PAGE_MASK; | |
692 | len = min_t(size_t, left, PAGE_SIZE - page_off); | |
693 | copied = copy_page_to_iter(pages[idx++], | |
694 | page_off, len, to); | |
695 | off += copied; | |
696 | left -= copied; | |
697 | if (copied < len) { | |
698 | ret = -EFAULT; | |
7ce469a5 | 699 | break; |
fce7a974 | 700 | } |
7ce469a5 | 701 | } |
fce7a974 | 702 | ceph_release_page_vector(pages, num_pages); |
8eb4efb0 | 703 | } |
fce7a974 | 704 | |
131d7eb4 YZ |
705 | if (ret < 0) { |
706 | if (ret == -EBLACKLISTED) | |
707 | fsc->blacklisted = true; | |
708 | break; | |
709 | } | |
710 | ||
711 | if (off >= i_size || !more) | |
fce7a974 | 712 | break; |
8eb4efb0 | 713 | } |
124e68e7 | 714 | |
8eb4efb0 | 715 | if (off > iocb->ki_pos) { |
fce7a974 YZ |
716 | if (ret >= 0 && |
717 | iov_iter_count(to) > 0 && off >= i_size_read(inode)) | |
718 | *retry_op = CHECK_EOF; | |
8eb4efb0 | 719 | ret = off - iocb->ki_pos; |
720 | iocb->ki_pos = off; | |
721 | } | |
124e68e7 | 722 | |
fce7a974 | 723 | dout("sync_read result %zd retry_op %d\n", ret, *retry_op); |
124e68e7 SW |
724 | return ret; |
725 | } | |
726 | ||
c8fe9b17 YZ |
727 | struct ceph_aio_request { |
728 | struct kiocb *iocb; | |
729 | size_t total_len; | |
85784f93 YZ |
730 | bool write; |
731 | bool should_dirty; | |
c8fe9b17 YZ |
732 | int error; |
733 | struct list_head osd_reqs; | |
734 | unsigned num_reqs; | |
735 | atomic_t pending_reqs; | |
fac02ddf | 736 | struct timespec64 mtime; |
c8fe9b17 YZ |
737 | struct ceph_cap_flush *prealloc_cf; |
738 | }; | |
739 | ||
5be0389d YZ |
740 | struct ceph_aio_work { |
741 | struct work_struct work; | |
742 | struct ceph_osd_request *req; | |
743 | }; | |
744 | ||
745 | static void ceph_aio_retry_work(struct work_struct *work); | |
746 | ||
c8fe9b17 YZ |
747 | static void ceph_aio_complete(struct inode *inode, |
748 | struct ceph_aio_request *aio_req) | |
749 | { | |
750 | struct ceph_inode_info *ci = ceph_inode(inode); | |
751 | int ret; | |
752 | ||
753 | if (!atomic_dec_and_test(&aio_req->pending_reqs)) | |
754 | return; | |
755 | ||
6a81749e JL |
756 | if (aio_req->iocb->ki_flags & IOCB_DIRECT) |
757 | inode_dio_end(inode); | |
758 | ||
c8fe9b17 YZ |
759 | ret = aio_req->error; |
760 | if (!ret) | |
761 | ret = aio_req->total_len; | |
762 | ||
763 | dout("ceph_aio_complete %p rc %d\n", inode, ret); | |
764 | ||
765 | if (ret >= 0 && aio_req->write) { | |
766 | int dirty; | |
767 | ||
768 | loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len; | |
769 | if (endoff > i_size_read(inode)) { | |
770 | if (ceph_inode_set_size(inode, endoff)) | |
771 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
772 | } | |
773 | ||
774 | spin_lock(&ci->i_ceph_lock); | |
775 | ci->i_inline_version = CEPH_INLINE_NONE; | |
776 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, | |
777 | &aio_req->prealloc_cf); | |
778 | spin_unlock(&ci->i_ceph_lock); | |
779 | if (dirty) | |
780 | __mark_inode_dirty(inode, dirty); | |
781 | ||
782 | } | |
783 | ||
784 | ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR : | |
785 | CEPH_CAP_FILE_RD)); | |
786 | ||
787 | aio_req->iocb->ki_complete(aio_req->iocb, ret, 0); | |
788 | ||
789 | ceph_free_cap_flush(aio_req->prealloc_cf); | |
790 | kfree(aio_req); | |
791 | } | |
792 | ||
85e084fe | 793 | static void ceph_aio_complete_req(struct ceph_osd_request *req) |
c8fe9b17 YZ |
794 | { |
795 | int rc = req->r_result; | |
796 | struct inode *inode = req->r_inode; | |
797 | struct ceph_aio_request *aio_req = req->r_priv; | |
798 | struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0); | |
c8fe9b17 | 799 | |
fc218544 ID |
800 | BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_BVECS); |
801 | BUG_ON(!osd_data->num_bvecs); | |
802 | ||
803 | dout("ceph_aio_complete_req %p rc %d bytes %u\n", | |
804 | inode, rc, osd_data->bvec_pos.iter.bi_size); | |
c8fe9b17 YZ |
805 | |
806 | if (rc == -EOLDSNAPC) { | |
5be0389d YZ |
807 | struct ceph_aio_work *aio_work; |
808 | BUG_ON(!aio_req->write); | |
809 | ||
810 | aio_work = kmalloc(sizeof(*aio_work), GFP_NOFS); | |
811 | if (aio_work) { | |
812 | INIT_WORK(&aio_work->work, ceph_aio_retry_work); | |
813 | aio_work->req = req; | |
1cf89a8d | 814 | queue_work(ceph_inode_to_client(inode)->inode_wq, |
5be0389d YZ |
815 | &aio_work->work); |
816 | return; | |
817 | } | |
818 | rc = -ENOMEM; | |
819 | } else if (!aio_req->write) { | |
c8fe9b17 YZ |
820 | if (rc == -ENOENT) |
821 | rc = 0; | |
fc218544 ID |
822 | if (rc >= 0 && osd_data->bvec_pos.iter.bi_size > rc) { |
823 | struct iov_iter i; | |
824 | int zlen = osd_data->bvec_pos.iter.bi_size - rc; | |
825 | ||
c8fe9b17 YZ |
826 | /* |
827 | * If read is satisfied by single OSD request, | |
828 | * it can pass EOF. Otherwise read is within | |
829 | * i_size. | |
830 | */ | |
831 | if (aio_req->num_reqs == 1) { | |
832 | loff_t i_size = i_size_read(inode); | |
833 | loff_t endoff = aio_req->iocb->ki_pos + rc; | |
834 | if (endoff < i_size) | |
835 | zlen = min_t(size_t, zlen, | |
836 | i_size - endoff); | |
837 | aio_req->total_len = rc + zlen; | |
838 | } | |
839 | ||
aa563d7b | 840 | iov_iter_bvec(&i, READ, osd_data->bvec_pos.bvecs, |
fc218544 ID |
841 | osd_data->num_bvecs, |
842 | osd_data->bvec_pos.iter.bi_size); | |
843 | iov_iter_advance(&i, rc); | |
844 | iov_iter_zero(zlen, &i); | |
c8fe9b17 YZ |
845 | } |
846 | } | |
847 | ||
fc218544 ID |
848 | put_bvecs(osd_data->bvec_pos.bvecs, osd_data->num_bvecs, |
849 | aio_req->should_dirty); | |
c8fe9b17 YZ |
850 | ceph_osdc_put_request(req); |
851 | ||
852 | if (rc < 0) | |
853 | cmpxchg(&aio_req->error, 0, rc); | |
854 | ||
855 | ceph_aio_complete(inode, aio_req); | |
856 | return; | |
857 | } | |
858 | ||
5be0389d YZ |
859 | static void ceph_aio_retry_work(struct work_struct *work) |
860 | { | |
861 | struct ceph_aio_work *aio_work = | |
862 | container_of(work, struct ceph_aio_work, work); | |
863 | struct ceph_osd_request *orig_req = aio_work->req; | |
864 | struct ceph_aio_request *aio_req = orig_req->r_priv; | |
865 | struct inode *inode = orig_req->r_inode; | |
866 | struct ceph_inode_info *ci = ceph_inode(inode); | |
867 | struct ceph_snap_context *snapc; | |
868 | struct ceph_osd_request *req; | |
869 | int ret; | |
870 | ||
871 | spin_lock(&ci->i_ceph_lock); | |
872 | if (__ceph_have_pending_cap_snap(ci)) { | |
873 | struct ceph_cap_snap *capsnap = | |
874 | list_last_entry(&ci->i_cap_snaps, | |
875 | struct ceph_cap_snap, | |
876 | ci_item); | |
877 | snapc = ceph_get_snap_context(capsnap->context); | |
878 | } else { | |
879 | BUG_ON(!ci->i_head_snapc); | |
880 | snapc = ceph_get_snap_context(ci->i_head_snapc); | |
881 | } | |
882 | spin_unlock(&ci->i_ceph_lock); | |
883 | ||
61d2f855 | 884 | req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 1, |
5be0389d | 885 | false, GFP_NOFS); |
1418bf07 DC |
886 | if (!req) { |
887 | ret = -ENOMEM; | |
5be0389d YZ |
888 | req = orig_req; |
889 | goto out; | |
890 | } | |
891 | ||
b178cf43 | 892 | req->r_flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
63244fa1 | 893 | ceph_oloc_copy(&req->r_base_oloc, &orig_req->r_base_oloc); |
d30291b9 | 894 | ceph_oid_copy(&req->r_base_oid, &orig_req->r_base_oid); |
5be0389d | 895 | |
26f887e0 ID |
896 | req->r_ops[0] = orig_req->r_ops[0]; |
897 | ||
898 | req->r_mtime = aio_req->mtime; | |
899 | req->r_data_offset = req->r_ops[0].extent.offset; | |
900 | ||
13d1ad16 ID |
901 | ret = ceph_osdc_alloc_messages(req, GFP_NOFS); |
902 | if (ret) { | |
903 | ceph_osdc_put_request(req); | |
904 | req = orig_req; | |
905 | goto out; | |
906 | } | |
5be0389d | 907 | |
5be0389d YZ |
908 | ceph_osdc_put_request(orig_req); |
909 | ||
910 | req->r_callback = ceph_aio_complete_req; | |
911 | req->r_inode = inode; | |
912 | req->r_priv = aio_req; | |
913 | ||
914 | ret = ceph_osdc_start_request(req->r_osdc, req, false); | |
915 | out: | |
916 | if (ret < 0) { | |
5be0389d | 917 | req->r_result = ret; |
85e084fe | 918 | ceph_aio_complete_req(req); |
5be0389d YZ |
919 | } |
920 | ||
db6aed70 | 921 | ceph_put_snap_context(snapc); |
5be0389d YZ |
922 | kfree(aio_work); |
923 | } | |
924 | ||
e8344e66 | 925 | static ssize_t |
c8fe9b17 YZ |
926 | ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter, |
927 | struct ceph_snap_context *snapc, | |
928 | struct ceph_cap_flush **pcf) | |
124e68e7 | 929 | { |
e8344e66 | 930 | struct file *file = iocb->ki_filp; |
496ad9aa | 931 | struct inode *inode = file_inode(file); |
124e68e7 | 932 | struct ceph_inode_info *ci = ceph_inode(inode); |
3d14c5d2 | 933 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
acead002 | 934 | struct ceph_vino vino; |
124e68e7 | 935 | struct ceph_osd_request *req; |
fc218544 | 936 | struct bio_vec *bvecs; |
c8fe9b17 YZ |
937 | struct ceph_aio_request *aio_req = NULL; |
938 | int num_pages = 0; | |
124e68e7 | 939 | int flags; |
321fe13c | 940 | int ret = 0; |
fac02ddf | 941 | struct timespec64 mtime = current_time(inode); |
c8fe9b17 YZ |
942 | size_t count = iov_iter_count(iter); |
943 | loff_t pos = iocb->ki_pos; | |
944 | bool write = iov_iter_rw(iter) == WRITE; | |
85784f93 | 945 | bool should_dirty = !write && iter_is_iovec(iter); |
124e68e7 | 946 | |
c8fe9b17 | 947 | if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP) |
124e68e7 SW |
948 | return -EROFS; |
949 | ||
1c0a9c2d YZ |
950 | dout("sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n", |
951 | (write ? "write" : "read"), file, pos, (unsigned)count, | |
40e7e2c0 | 952 | snapc, snapc ? snapc->seq : 0); |
124e68e7 | 953 | |
c8fe9b17 | 954 | if (write) { |
5d7eb1a3 | 955 | int ret2 = invalidate_inode_pages2_range(inode->i_mapping, |
09cbfeaf | 956 | pos >> PAGE_SHIFT, |
e450f4d1 | 957 | (pos + count - 1) >> PAGE_SHIFT); |
5d7eb1a3 | 958 | if (ret2 < 0) |
a380a031 | 959 | dout("invalidate_inode_pages2_range returned %d\n", ret2); |
29065a51 | 960 | |
b178cf43 | 961 | flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
c8fe9b17 YZ |
962 | } else { |
963 | flags = CEPH_OSD_FLAG_READ; | |
964 | } | |
124e68e7 | 965 | |
c8fe9b17 | 966 | while (iov_iter_count(iter) > 0) { |
fc218544 | 967 | u64 size = iov_iter_count(iter); |
c8fe9b17 | 968 | ssize_t len; |
e8344e66 | 969 | |
3a15b38f ID |
970 | if (write) |
971 | size = min_t(u64, size, fsc->mount_options->wsize); | |
972 | else | |
973 | size = min_t(u64, size, fsc->mount_options->rsize); | |
974 | ||
e8344e66 | 975 | vino = ceph_vino(inode); |
976 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
c8fe9b17 | 977 | vino, pos, &size, 0, |
3fb99d48 | 978 | 1, |
c8fe9b17 YZ |
979 | write ? CEPH_OSD_OP_WRITE : |
980 | CEPH_OSD_OP_READ, | |
981 | flags, snapc, | |
e8344e66 | 982 | ci->i_truncate_seq, |
983 | ci->i_truncate_size, | |
984 | false); | |
985 | if (IS_ERR(req)) { | |
986 | ret = PTR_ERR(req); | |
eab87235 | 987 | break; |
e8344e66 | 988 | } |
124e68e7 | 989 | |
fc218544 ID |
990 | len = iter_get_bvecs_alloc(iter, size, &bvecs, &num_pages); |
991 | if (len < 0) { | |
64c31311 | 992 | ceph_osdc_put_request(req); |
fc218544 | 993 | ret = len; |
64c31311 | 994 | break; |
124e68e7 | 995 | } |
fc218544 ID |
996 | if (len != size) |
997 | osd_req_op_extent_update(req, 0, len); | |
124e68e7 SW |
998 | |
999 | /* | |
c8fe9b17 YZ |
1000 | * To simplify error handling, allow AIO when IO within i_size |
1001 | * or IO can be satisfied by single OSD request. | |
124e68e7 | 1002 | */ |
c8fe9b17 YZ |
1003 | if (pos == iocb->ki_pos && !is_sync_kiocb(iocb) && |
1004 | (len == count || pos + count <= i_size_read(inode))) { | |
1005 | aio_req = kzalloc(sizeof(*aio_req), GFP_KERNEL); | |
1006 | if (aio_req) { | |
1007 | aio_req->iocb = iocb; | |
1008 | aio_req->write = write; | |
85784f93 | 1009 | aio_req->should_dirty = should_dirty; |
c8fe9b17 YZ |
1010 | INIT_LIST_HEAD(&aio_req->osd_reqs); |
1011 | if (write) { | |
5be0389d | 1012 | aio_req->mtime = mtime; |
c8fe9b17 YZ |
1013 | swap(aio_req->prealloc_cf, *pcf); |
1014 | } | |
1015 | } | |
1016 | /* ignore error */ | |
1017 | } | |
1018 | ||
1019 | if (write) { | |
1020 | /* | |
1021 | * throw out any page cache pages in this range. this | |
1022 | * may block. | |
1023 | */ | |
1024 | truncate_inode_pages_range(inode->i_mapping, pos, | |
d31d07b9 | 1025 | PAGE_ALIGN(pos + len) - 1); |
c8fe9b17 | 1026 | |
bb873b53 | 1027 | req->r_mtime = mtime; |
c8fe9b17 YZ |
1028 | } |
1029 | ||
fc218544 | 1030 | osd_req_op_extent_osd_data_bvecs(req, 0, bvecs, num_pages, len); |
e8344e66 | 1031 | |
c8fe9b17 YZ |
1032 | if (aio_req) { |
1033 | aio_req->total_len += len; | |
1034 | aio_req->num_reqs++; | |
1035 | atomic_inc(&aio_req->pending_reqs); | |
1036 | ||
1037 | req->r_callback = ceph_aio_complete_req; | |
1038 | req->r_inode = inode; | |
1039 | req->r_priv = aio_req; | |
94e85771 | 1040 | list_add_tail(&req->r_private_item, &aio_req->osd_reqs); |
c8fe9b17 YZ |
1041 | |
1042 | pos += len; | |
c8fe9b17 YZ |
1043 | continue; |
1044 | } | |
1045 | ||
1046 | ret = ceph_osdc_start_request(req->r_osdc, req, false); | |
e8344e66 | 1047 | if (!ret) |
1048 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
1049 | ||
c8fe9b17 YZ |
1050 | size = i_size_read(inode); |
1051 | if (!write) { | |
1052 | if (ret == -ENOENT) | |
1053 | ret = 0; | |
1054 | if (ret >= 0 && ret < len && pos + ret < size) { | |
fc218544 | 1055 | struct iov_iter i; |
c8fe9b17 YZ |
1056 | int zlen = min_t(size_t, len - ret, |
1057 | size - pos - ret); | |
fc218544 | 1058 | |
aa563d7b | 1059 | iov_iter_bvec(&i, READ, bvecs, num_pages, len); |
fc218544 ID |
1060 | iov_iter_advance(&i, ret); |
1061 | iov_iter_zero(zlen, &i); | |
c8fe9b17 YZ |
1062 | ret += zlen; |
1063 | } | |
1064 | if (ret >= 0) | |
1065 | len = ret; | |
1066 | } | |
1067 | ||
fc218544 | 1068 | put_bvecs(bvecs, num_pages, should_dirty); |
e8344e66 | 1069 | ceph_osdc_put_request(req); |
c8fe9b17 | 1070 | if (ret < 0) |
e8344e66 | 1071 | break; |
64c31311 | 1072 | |
c8fe9b17 | 1073 | pos += len; |
c8fe9b17 | 1074 | if (!write && pos >= size) |
e8344e66 | 1075 | break; |
64c31311 | 1076 | |
c8fe9b17 YZ |
1077 | if (write && pos > size) { |
1078 | if (ceph_inode_set_size(inode, pos)) | |
64c31311 AV |
1079 | ceph_check_caps(ceph_inode(inode), |
1080 | CHECK_CAPS_AUTHONLY, | |
1081 | NULL); | |
1082 | } | |
e8344e66 | 1083 | } |
1084 | ||
c8fe9b17 | 1085 | if (aio_req) { |
fc8c3892 YZ |
1086 | LIST_HEAD(osd_reqs); |
1087 | ||
c8fe9b17 YZ |
1088 | if (aio_req->num_reqs == 0) { |
1089 | kfree(aio_req); | |
1090 | return ret; | |
1091 | } | |
1092 | ||
1093 | ceph_get_cap_refs(ci, write ? CEPH_CAP_FILE_WR : | |
1094 | CEPH_CAP_FILE_RD); | |
1095 | ||
fc8c3892 | 1096 | list_splice(&aio_req->osd_reqs, &osd_reqs); |
6a81749e | 1097 | inode_dio_begin(inode); |
fc8c3892 YZ |
1098 | while (!list_empty(&osd_reqs)) { |
1099 | req = list_first_entry(&osd_reqs, | |
c8fe9b17 | 1100 | struct ceph_osd_request, |
94e85771 ID |
1101 | r_private_item); |
1102 | list_del_init(&req->r_private_item); | |
c8fe9b17 YZ |
1103 | if (ret >= 0) |
1104 | ret = ceph_osdc_start_request(req->r_osdc, | |
1105 | req, false); | |
1106 | if (ret < 0) { | |
1107 | req->r_result = ret; | |
85e084fe | 1108 | ceph_aio_complete_req(req); |
c8fe9b17 YZ |
1109 | } |
1110 | } | |
1111 | return -EIOCBQUEUED; | |
1112 | } | |
1113 | ||
1114 | if (ret != -EOLDSNAPC && pos > iocb->ki_pos) { | |
1115 | ret = pos - iocb->ki_pos; | |
e8344e66 | 1116 | iocb->ki_pos = pos; |
e8344e66 | 1117 | } |
1118 | return ret; | |
1119 | } | |
1120 | ||
e8344e66 | 1121 | /* |
1122 | * Synchronous write, straight from __user pointer or user pages. | |
1123 | * | |
1124 | * If write spans object boundary, just do multiple writes. (For a | |
1125 | * correct atomic write, we should e.g. take write locks on all | |
1126 | * objects, rollback on failure, etc.) | |
1127 | */ | |
06fee30f | 1128 | static ssize_t |
5dda377c YZ |
1129 | ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos, |
1130 | struct ceph_snap_context *snapc) | |
e8344e66 | 1131 | { |
1132 | struct file *file = iocb->ki_filp; | |
1133 | struct inode *inode = file_inode(file); | |
1134 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1135 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
e8344e66 | 1136 | struct ceph_vino vino; |
1137 | struct ceph_osd_request *req; | |
1138 | struct page **pages; | |
1139 | u64 len; | |
1140 | int num_pages; | |
1141 | int written = 0; | |
1142 | int flags; | |
e8344e66 | 1143 | int ret; |
efb0ca76 | 1144 | bool check_caps = false; |
fac02ddf | 1145 | struct timespec64 mtime = current_time(inode); |
4908b822 | 1146 | size_t count = iov_iter_count(from); |
e8344e66 | 1147 | |
1148 | if (ceph_snap(file_inode(file)) != CEPH_NOSNAP) | |
1149 | return -EROFS; | |
1150 | ||
1c0a9c2d YZ |
1151 | dout("sync_write on file %p %lld~%u snapc %p seq %lld\n", |
1152 | file, pos, (unsigned)count, snapc, snapc->seq); | |
e8344e66 | 1153 | |
e450f4d1 | 1154 | ret = filemap_write_and_wait_range(inode->i_mapping, |
1155 | pos, pos + count - 1); | |
e8344e66 | 1156 | if (ret < 0) |
1157 | return ret; | |
1158 | ||
1159 | ret = invalidate_inode_pages2_range(inode->i_mapping, | |
09cbfeaf | 1160 | pos >> PAGE_SHIFT, |
e450f4d1 | 1161 | (pos + count - 1) >> PAGE_SHIFT); |
e8344e66 | 1162 | if (ret < 0) |
1163 | dout("invalidate_inode_pages2_range returned %d\n", ret); | |
1164 | ||
b178cf43 | 1165 | flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
e8344e66 | 1166 | |
4908b822 | 1167 | while ((len = iov_iter_count(from)) > 0) { |
e8344e66 | 1168 | size_t left; |
1169 | int n; | |
1170 | ||
e8344e66 | 1171 | vino = ceph_vino(inode); |
1172 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
715e4cd4 | 1173 | vino, pos, &len, 0, 1, |
e8344e66 | 1174 | CEPH_OSD_OP_WRITE, flags, snapc, |
1175 | ci->i_truncate_seq, | |
1176 | ci->i_truncate_size, | |
1177 | false); | |
1178 | if (IS_ERR(req)) { | |
1179 | ret = PTR_ERR(req); | |
eab87235 | 1180 | break; |
e8344e66 | 1181 | } |
1182 | ||
1183 | /* | |
1184 | * write from beginning of first page, | |
1185 | * regardless of io alignment | |
1186 | */ | |
09cbfeaf | 1187 | num_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e8344e66 | 1188 | |
687265e5 | 1189 | pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); |
124e68e7 SW |
1190 | if (IS_ERR(pages)) { |
1191 | ret = PTR_ERR(pages); | |
1192 | goto out; | |
1193 | } | |
e8344e66 | 1194 | |
1195 | left = len; | |
1196 | for (n = 0; n < num_pages; n++) { | |
125d725c | 1197 | size_t plen = min_t(size_t, left, PAGE_SIZE); |
4908b822 | 1198 | ret = copy_page_from_iter(pages[n], 0, plen, from); |
e8344e66 | 1199 | if (ret != plen) { |
1200 | ret = -EFAULT; | |
1201 | break; | |
1202 | } | |
1203 | left -= ret; | |
e8344e66 | 1204 | } |
1205 | ||
124e68e7 SW |
1206 | if (ret < 0) { |
1207 | ceph_release_page_vector(pages, num_pages); | |
1208 | goto out; | |
1209 | } | |
1210 | ||
e8344e66 | 1211 | req->r_inode = inode; |
124e68e7 | 1212 | |
e8344e66 | 1213 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0, |
1214 | false, true); | |
02ee07d3 | 1215 | |
bb873b53 | 1216 | req->r_mtime = mtime; |
e8344e66 | 1217 | ret = ceph_osdc_start_request(&fsc->client->osdc, req, false); |
1218 | if (!ret) | |
1219 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
124e68e7 SW |
1220 | |
1221 | out: | |
e8344e66 | 1222 | ceph_osdc_put_request(req); |
26544c62 JL |
1223 | if (ret != 0) { |
1224 | ceph_set_error_write(ci); | |
e8344e66 | 1225 | break; |
26544c62 JL |
1226 | } |
1227 | ||
1228 | ceph_clear_error_write(ci); | |
1229 | pos += len; | |
1230 | written += len; | |
1231 | if (pos > i_size_read(inode)) { | |
1232 | check_caps = ceph_inode_set_size(inode, pos); | |
1233 | if (check_caps) | |
1234 | ceph_check_caps(ceph_inode(inode), | |
1235 | CHECK_CAPS_AUTHONLY, | |
1236 | NULL); | |
1237 | } | |
1238 | ||
e8344e66 | 1239 | } |
124e68e7 | 1240 | |
e8344e66 | 1241 | if (ret != -EOLDSNAPC && written > 0) { |
124e68e7 | 1242 | ret = written; |
e8344e66 | 1243 | iocb->ki_pos = pos; |
124e68e7 SW |
1244 | } |
1245 | return ret; | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * Wrap generic_file_aio_read with checks for cap bits on the inode. | |
1250 | * Atomically grab references, so that those bits are not released | |
1251 | * back to the MDS mid-read. | |
1252 | * | |
1253 | * Hmm, the sync read case isn't actually async... should it be? | |
1254 | */ | |
3644424d | 1255 | static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to) |
124e68e7 SW |
1256 | { |
1257 | struct file *filp = iocb->ki_filp; | |
2962507c | 1258 | struct ceph_file_info *fi = filp->private_data; |
66ee59af | 1259 | size_t len = iov_iter_count(to); |
496ad9aa | 1260 | struct inode *inode = file_inode(filp); |
124e68e7 | 1261 | struct ceph_inode_info *ci = ceph_inode(inode); |
3738daa6 | 1262 | struct page *pinned_page = NULL; |
124e68e7 | 1263 | ssize_t ret; |
2962507c | 1264 | int want, got = 0; |
83701246 | 1265 | int retry_op = 0, read = 0; |
124e68e7 | 1266 | |
6a026589 | 1267 | again: |
8eb4efb0 | 1268 | dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n", |
1269 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, inode); | |
1270 | ||
a81bc310 JL |
1271 | if (iocb->ki_flags & IOCB_DIRECT) |
1272 | ceph_start_io_direct(inode); | |
1273 | else | |
1274 | ceph_start_io_read(inode); | |
1275 | ||
2962507c SW |
1276 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
1277 | want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; | |
1278 | else | |
1279 | want = CEPH_CAP_FILE_CACHE; | |
5e3ded1b YZ |
1280 | ret = ceph_get_caps(filp, CEPH_CAP_FILE_RD, want, -1, |
1281 | &got, &pinned_page); | |
a81bc310 JL |
1282 | if (ret < 0) { |
1283 | if (iocb->ki_flags & IOCB_DIRECT) | |
1284 | ceph_end_io_direct(inode); | |
1285 | else | |
1286 | ceph_end_io_read(inode); | |
8eb4efb0 | 1287 | return ret; |
a81bc310 | 1288 | } |
124e68e7 | 1289 | |
2962507c | 1290 | if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 || |
2ba48ce5 | 1291 | (iocb->ki_flags & IOCB_DIRECT) || |
8eb4efb0 | 1292 | (fi->flags & CEPH_F_SYNC)) { |
8eb4efb0 | 1293 | |
1294 | dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n", | |
1295 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, | |
1296 | ceph_cap_string(got)); | |
1297 | ||
83701246 | 1298 | if (ci->i_inline_version == CEPH_INLINE_NONE) { |
c8fe9b17 YZ |
1299 | if (!retry_op && (iocb->ki_flags & IOCB_DIRECT)) { |
1300 | ret = ceph_direct_read_write(iocb, to, | |
1301 | NULL, NULL); | |
1302 | if (ret >= 0 && ret < len) | |
1303 | retry_op = CHECK_EOF; | |
1304 | } else { | |
1305 | ret = ceph_sync_read(iocb, to, &retry_op); | |
1306 | } | |
83701246 YZ |
1307 | } else { |
1308 | retry_op = READ_INLINE; | |
1309 | } | |
8eb4efb0 | 1310 | } else { |
5d988308 | 1311 | CEPH_DEFINE_RW_CONTEXT(rw_ctx, got); |
8eb4efb0 | 1312 | dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n", |
3644424d | 1313 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, |
8eb4efb0 | 1314 | ceph_cap_string(got)); |
5d988308 | 1315 | ceph_add_rw_context(fi, &rw_ctx); |
3644424d | 1316 | ret = generic_file_read_iter(iocb, to); |
5d988308 | 1317 | ceph_del_rw_context(fi, &rw_ctx); |
8eb4efb0 | 1318 | } |
a81bc310 | 1319 | |
124e68e7 SW |
1320 | dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n", |
1321 | inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret); | |
3738daa6 | 1322 | if (pinned_page) { |
09cbfeaf | 1323 | put_page(pinned_page); |
3738daa6 YZ |
1324 | pinned_page = NULL; |
1325 | } | |
124e68e7 | 1326 | ceph_put_cap_refs(ci, got); |
a81bc310 JL |
1327 | |
1328 | if (iocb->ki_flags & IOCB_DIRECT) | |
1329 | ceph_end_io_direct(inode); | |
1330 | else | |
1331 | ceph_end_io_read(inode); | |
1332 | ||
c8fe9b17 | 1333 | if (retry_op > HAVE_RETRIED && ret >= 0) { |
83701246 YZ |
1334 | int statret; |
1335 | struct page *page = NULL; | |
1336 | loff_t i_size; | |
1337 | if (retry_op == READ_INLINE) { | |
687265e5 | 1338 | page = __page_cache_alloc(GFP_KERNEL); |
83701246 YZ |
1339 | if (!page) |
1340 | return -ENOMEM; | |
1341 | } | |
6a026589 | 1342 | |
83701246 YZ |
1343 | statret = __ceph_do_getattr(inode, page, |
1344 | CEPH_STAT_CAP_INLINE_DATA, !!page); | |
1345 | if (statret < 0) { | |
0d7718f6 NB |
1346 | if (page) |
1347 | __free_page(page); | |
83701246 YZ |
1348 | if (statret == -ENODATA) { |
1349 | BUG_ON(retry_op != READ_INLINE); | |
1350 | goto again; | |
1351 | } | |
1352 | return statret; | |
1353 | } | |
6a026589 | 1354 | |
83701246 YZ |
1355 | i_size = i_size_read(inode); |
1356 | if (retry_op == READ_INLINE) { | |
fcc02d2a YZ |
1357 | BUG_ON(ret > 0 || read > 0); |
1358 | if (iocb->ki_pos < i_size && | |
09cbfeaf | 1359 | iocb->ki_pos < PAGE_SIZE) { |
83701246 YZ |
1360 | loff_t end = min_t(loff_t, i_size, |
1361 | iocb->ki_pos + len); | |
09cbfeaf | 1362 | end = min_t(loff_t, end, PAGE_SIZE); |
83701246 YZ |
1363 | if (statret < end) |
1364 | zero_user_segment(page, statret, end); | |
1365 | ret = copy_page_to_iter(page, | |
1366 | iocb->ki_pos & ~PAGE_MASK, | |
1367 | end - iocb->ki_pos, to); | |
1368 | iocb->ki_pos += ret; | |
fcc02d2a YZ |
1369 | read += ret; |
1370 | } | |
1371 | if (iocb->ki_pos < i_size && read < len) { | |
1372 | size_t zlen = min_t(size_t, len - read, | |
1373 | i_size - iocb->ki_pos); | |
1374 | ret = iov_iter_zero(zlen, to); | |
1375 | iocb->ki_pos += ret; | |
1376 | read += ret; | |
83701246 YZ |
1377 | } |
1378 | __free_pages(page, 0); | |
fcc02d2a | 1379 | return read; |
83701246 | 1380 | } |
6a026589 SW |
1381 | |
1382 | /* hit EOF or hole? */ | |
83701246 | 1383 | if (retry_op == CHECK_EOF && iocb->ki_pos < i_size && |
fcc02d2a | 1384 | ret < len) { |
8eb4efb0 | 1385 | dout("sync_read hit hole, ppos %lld < size %lld" |
99c88e69 | 1386 | ", reading more\n", iocb->ki_pos, i_size); |
8eb4efb0 | 1387 | |
6a026589 | 1388 | read += ret; |
6a026589 | 1389 | len -= ret; |
c8fe9b17 | 1390 | retry_op = HAVE_RETRIED; |
6a026589 SW |
1391 | goto again; |
1392 | } | |
1393 | } | |
8eb4efb0 | 1394 | |
6a026589 SW |
1395 | if (ret >= 0) |
1396 | ret += read; | |
1397 | ||
124e68e7 SW |
1398 | return ret; |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | * Take cap references to avoid releasing caps to MDS mid-write. | |
1403 | * | |
1404 | * If we are synchronous, and write with an old snap context, the OSD | |
1405 | * may return EOLDSNAPC. In that case, retry the write.. _after_ | |
1406 | * dropping our cap refs and allowing the pending snap to logically | |
1407 | * complete _before_ this write occurs. | |
1408 | * | |
1409 | * If we are near ENOSPC, write synchronously. | |
1410 | */ | |
4908b822 | 1411 | static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) |
124e68e7 SW |
1412 | { |
1413 | struct file *file = iocb->ki_filp; | |
33caad32 | 1414 | struct ceph_file_info *fi = file->private_data; |
496ad9aa | 1415 | struct inode *inode = file_inode(file); |
124e68e7 | 1416 | struct ceph_inode_info *ci = ceph_inode(inode); |
8687a3e2 | 1417 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
27c7e25d | 1418 | struct ceph_osd_client *osdc = &fsc->client->osdc; |
f66fd9f0 | 1419 | struct ceph_cap_flush *prealloc_cf; |
3309dd04 | 1420 | ssize_t count, written = 0; |
03d254ed | 1421 | int err, want, got; |
8b30ce8a | 1422 | bool direct_lock = false; |
27c7e25d ID |
1423 | u32 map_flags; |
1424 | u64 pool_flags; | |
3309dd04 | 1425 | loff_t pos; |
8687a3e2 | 1426 | loff_t limit = max(i_size_read(inode), fsc->max_file_size); |
124e68e7 SW |
1427 | |
1428 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
1429 | return -EROFS; | |
1430 | ||
f66fd9f0 YZ |
1431 | prealloc_cf = ceph_alloc_cap_flush(); |
1432 | if (!prealloc_cf) | |
1433 | return -ENOMEM; | |
1434 | ||
8b30ce8a XL |
1435 | if ((iocb->ki_flags & (IOCB_DIRECT | IOCB_APPEND)) == IOCB_DIRECT) |
1436 | direct_lock = true; | |
1437 | ||
a5cd74ad | 1438 | retry_snap: |
8b30ce8a | 1439 | if (direct_lock) |
321fe13c JL |
1440 | ceph_start_io_direct(inode); |
1441 | else | |
1442 | ceph_start_io_write(inode); | |
03d254ed | 1443 | |
03d254ed | 1444 | /* We can write back this queue in page reclaim */ |
de1414a6 | 1445 | current->backing_dev_info = inode_to_bdi(inode); |
03d254ed | 1446 | |
55b0b31c YZ |
1447 | if (iocb->ki_flags & IOCB_APPEND) { |
1448 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); | |
1449 | if (err < 0) | |
1450 | goto out; | |
1451 | } | |
1452 | ||
3309dd04 AV |
1453 | err = generic_write_checks(iocb, from); |
1454 | if (err <= 0) | |
03d254ed YZ |
1455 | goto out; |
1456 | ||
3309dd04 | 1457 | pos = iocb->ki_pos; |
8687a3e2 CX |
1458 | if (unlikely(pos >= limit)) { |
1459 | err = -EFBIG; | |
1460 | goto out; | |
1461 | } else { | |
1462 | iov_iter_truncate(from, limit - pos); | |
1463 | } | |
1464 | ||
3309dd04 | 1465 | count = iov_iter_count(from); |
2b83845f LH |
1466 | if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) { |
1467 | err = -EDQUOT; | |
1468 | goto out; | |
1469 | } | |
1470 | ||
5fa8e0a1 | 1471 | err = file_remove_privs(file); |
03d254ed YZ |
1472 | if (err) |
1473 | goto out; | |
1474 | ||
1475 | err = file_update_time(file); | |
1476 | if (err) | |
1477 | goto out; | |
1478 | ||
5c308356 JL |
1479 | inode_inc_iversion_raw(inode); |
1480 | ||
28127bdd YZ |
1481 | if (ci->i_inline_version != CEPH_INLINE_NONE) { |
1482 | err = ceph_uninline_data(file, NULL); | |
1483 | if (err < 0) | |
1484 | goto out; | |
1485 | } | |
1486 | ||
27c7e25d ID |
1487 | down_read(&osdc->lock); |
1488 | map_flags = osdc->osdmap->flags; | |
1489 | pool_flags = ceph_pg_pool_flags(osdc->osdmap, ci->i_layout.pool_id); | |
1490 | up_read(&osdc->lock); | |
1491 | if ((map_flags & CEPH_OSDMAP_FULL) || | |
1492 | (pool_flags & CEPH_POOL_FLAG_FULL)) { | |
03d254ed | 1493 | err = -ENOSPC; |
6070e0c1 YZ |
1494 | goto out; |
1495 | } | |
03d254ed | 1496 | |
ac7f29bf | 1497 | dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n", |
99c88e69 | 1498 | inode, ceph_vinop(inode), pos, count, i_size_read(inode)); |
7971bd92 SW |
1499 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
1500 | want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; | |
1501 | else | |
1502 | want = CEPH_CAP_FILE_BUFFER; | |
03d254ed | 1503 | got = 0; |
5e3ded1b | 1504 | err = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, pos + count, |
3738daa6 | 1505 | &got, NULL); |
03d254ed | 1506 | if (err < 0) |
37505d57 | 1507 | goto out; |
124e68e7 | 1508 | |
ac7f29bf | 1509 | dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n", |
03d254ed | 1510 | inode, ceph_vinop(inode), pos, count, ceph_cap_string(got)); |
7971bd92 SW |
1511 | |
1512 | if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 || | |
26544c62 JL |
1513 | (iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) || |
1514 | (ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) { | |
5dda377c | 1515 | struct ceph_snap_context *snapc; |
4908b822 | 1516 | struct iov_iter data; |
5dda377c YZ |
1517 | |
1518 | spin_lock(&ci->i_ceph_lock); | |
1519 | if (__ceph_have_pending_cap_snap(ci)) { | |
1520 | struct ceph_cap_snap *capsnap = | |
1521 | list_last_entry(&ci->i_cap_snaps, | |
1522 | struct ceph_cap_snap, | |
1523 | ci_item); | |
1524 | snapc = ceph_get_snap_context(capsnap->context); | |
1525 | } else { | |
1526 | BUG_ON(!ci->i_head_snapc); | |
1527 | snapc = ceph_get_snap_context(ci->i_head_snapc); | |
1528 | } | |
1529 | spin_unlock(&ci->i_ceph_lock); | |
1530 | ||
4908b822 AV |
1531 | /* we might need to revert back to that point */ |
1532 | data = *from; | |
8b30ce8a | 1533 | if (iocb->ki_flags & IOCB_DIRECT) |
c8fe9b17 YZ |
1534 | written = ceph_direct_read_write(iocb, &data, snapc, |
1535 | &prealloc_cf); | |
8b30ce8a | 1536 | else |
5dda377c | 1537 | written = ceph_sync_write(iocb, &data, pos, snapc); |
8b30ce8a XL |
1538 | if (direct_lock) |
1539 | ceph_end_io_direct(inode); | |
1540 | else | |
321fe13c | 1541 | ceph_end_io_write(inode); |
4908b822 AV |
1542 | if (written > 0) |
1543 | iov_iter_advance(from, written); | |
5dda377c | 1544 | ceph_put_snap_context(snapc); |
7971bd92 | 1545 | } else { |
b0d7c223 YZ |
1546 | /* |
1547 | * No need to acquire the i_truncate_mutex. Because | |
1548 | * the MDS revokes Fwb caps before sending truncate | |
1549 | * message to us. We can't get Fwb cap while there | |
1550 | * are pending vmtruncate. So write and vmtruncate | |
1551 | * can not run at the same time | |
1552 | */ | |
4908b822 | 1553 | written = generic_perform_write(file, from, pos); |
aec605f4 AV |
1554 | if (likely(written >= 0)) |
1555 | iocb->ki_pos = pos + written; | |
321fe13c | 1556 | ceph_end_io_write(inode); |
7971bd92 | 1557 | } |
d8de9ab6 | 1558 | |
03d254ed | 1559 | if (written >= 0) { |
fca65b4a | 1560 | int dirty; |
1ab302a0 | 1561 | |
be655596 | 1562 | spin_lock(&ci->i_ceph_lock); |
28127bdd | 1563 | ci->i_inline_version = CEPH_INLINE_NONE; |
f66fd9f0 YZ |
1564 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
1565 | &prealloc_cf); | |
be655596 | 1566 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
1567 | if (dirty) |
1568 | __mark_inode_dirty(inode, dirty); | |
1ab302a0 LH |
1569 | if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos)) |
1570 | ceph_check_caps(ci, CHECK_CAPS_NODELAY, NULL); | |
124e68e7 | 1571 | } |
7971bd92 | 1572 | |
124e68e7 | 1573 | dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n", |
4908b822 | 1574 | inode, ceph_vinop(inode), pos, (unsigned)count, |
7971bd92 | 1575 | ceph_cap_string(got)); |
124e68e7 | 1576 | ceph_put_cap_refs(ci, got); |
7971bd92 | 1577 | |
a5cd74ad YZ |
1578 | if (written == -EOLDSNAPC) { |
1579 | dout("aio_write %p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n", | |
1580 | inode, ceph_vinop(inode), pos, (unsigned)count); | |
1581 | goto retry_snap; | |
1582 | } | |
1583 | ||
6aa657c8 | 1584 | if (written >= 0) { |
27c7e25d ID |
1585 | if ((map_flags & CEPH_OSDMAP_NEARFULL) || |
1586 | (pool_flags & CEPH_POOL_FLAG_NEARFULL)) | |
6aa657c8 | 1587 | iocb->ki_flags |= IOCB_DSYNC; |
6aa657c8 | 1588 | written = generic_write_sync(iocb, written); |
6070e0c1 | 1589 | } |
03d254ed | 1590 | |
2f75e9e1 | 1591 | goto out_unlocked; |
03d254ed | 1592 | out: |
8b30ce8a | 1593 | if (direct_lock) |
321fe13c JL |
1594 | ceph_end_io_direct(inode); |
1595 | else | |
1596 | ceph_end_io_write(inode); | |
2f75e9e1 | 1597 | out_unlocked: |
f66fd9f0 | 1598 | ceph_free_cap_flush(prealloc_cf); |
03d254ed | 1599 | current->backing_dev_info = NULL; |
03d254ed | 1600 | return written ? written : err; |
124e68e7 SW |
1601 | } |
1602 | ||
1603 | /* | |
1604 | * llseek. be sure to verify file size on SEEK_END. | |
1605 | */ | |
965c8e59 | 1606 | static loff_t ceph_llseek(struct file *file, loff_t offset, int whence) |
124e68e7 SW |
1607 | { |
1608 | struct inode *inode = file->f_mapping->host; | |
9da12e3a | 1609 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
99c88e69 | 1610 | loff_t i_size; |
955818cd | 1611 | loff_t ret; |
124e68e7 | 1612 | |
5955102c | 1613 | inode_lock(inode); |
6a82c47a | 1614 | |
965c8e59 | 1615 | if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) { |
508b32d8 | 1616 | ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); |
955818cd | 1617 | if (ret < 0) |
124e68e7 | 1618 | goto out; |
06222e49 JB |
1619 | } |
1620 | ||
99c88e69 | 1621 | i_size = i_size_read(inode); |
965c8e59 | 1622 | switch (whence) { |
06222e49 | 1623 | case SEEK_END: |
99c88e69 | 1624 | offset += i_size; |
124e68e7 SW |
1625 | break; |
1626 | case SEEK_CUR: | |
1627 | /* | |
1628 | * Here we special-case the lseek(fd, 0, SEEK_CUR) | |
1629 | * position-querying operation. Avoid rewriting the "same" | |
1630 | * f_pos value back to the file because a concurrent read(), | |
1631 | * write() or lseek() might have altered it | |
1632 | */ | |
1633 | if (offset == 0) { | |
955818cd | 1634 | ret = file->f_pos; |
124e68e7 SW |
1635 | goto out; |
1636 | } | |
1637 | offset += file->f_pos; | |
1638 | break; | |
06222e49 | 1639 | case SEEK_DATA: |
397f2389 | 1640 | if (offset < 0 || offset >= i_size) { |
06222e49 JB |
1641 | ret = -ENXIO; |
1642 | goto out; | |
1643 | } | |
1644 | break; | |
1645 | case SEEK_HOLE: | |
397f2389 | 1646 | if (offset < 0 || offset >= i_size) { |
06222e49 JB |
1647 | ret = -ENXIO; |
1648 | goto out; | |
1649 | } | |
99c88e69 | 1650 | offset = i_size; |
06222e49 | 1651 | break; |
124e68e7 SW |
1652 | } |
1653 | ||
9da12e3a | 1654 | ret = vfs_setpos(file, offset, max(i_size, fsc->max_file_size)); |
124e68e7 SW |
1655 | |
1656 | out: | |
5955102c | 1657 | inode_unlock(inode); |
955818cd | 1658 | return ret; |
124e68e7 SW |
1659 | } |
1660 | ||
ad7a60de LW |
1661 | static inline void ceph_zero_partial_page( |
1662 | struct inode *inode, loff_t offset, unsigned size) | |
1663 | { | |
1664 | struct page *page; | |
09cbfeaf | 1665 | pgoff_t index = offset >> PAGE_SHIFT; |
ad7a60de LW |
1666 | |
1667 | page = find_lock_page(inode->i_mapping, index); | |
1668 | if (page) { | |
1669 | wait_on_page_writeback(page); | |
09cbfeaf | 1670 | zero_user(page, offset & (PAGE_SIZE - 1), size); |
ad7a60de | 1671 | unlock_page(page); |
09cbfeaf | 1672 | put_page(page); |
ad7a60de LW |
1673 | } |
1674 | } | |
1675 | ||
1676 | static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset, | |
1677 | loff_t length) | |
1678 | { | |
09cbfeaf | 1679 | loff_t nearly = round_up(offset, PAGE_SIZE); |
ad7a60de LW |
1680 | if (offset < nearly) { |
1681 | loff_t size = nearly - offset; | |
1682 | if (length < size) | |
1683 | size = length; | |
1684 | ceph_zero_partial_page(inode, offset, size); | |
1685 | offset += size; | |
1686 | length -= size; | |
1687 | } | |
09cbfeaf KS |
1688 | if (length >= PAGE_SIZE) { |
1689 | loff_t size = round_down(length, PAGE_SIZE); | |
ad7a60de LW |
1690 | truncate_pagecache_range(inode, offset, offset + size - 1); |
1691 | offset += size; | |
1692 | length -= size; | |
1693 | } | |
1694 | if (length) | |
1695 | ceph_zero_partial_page(inode, offset, length); | |
1696 | } | |
1697 | ||
1698 | static int ceph_zero_partial_object(struct inode *inode, | |
1699 | loff_t offset, loff_t *length) | |
1700 | { | |
1701 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1702 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
1703 | struct ceph_osd_request *req; | |
1704 | int ret = 0; | |
1705 | loff_t zero = 0; | |
1706 | int op; | |
1707 | ||
1708 | if (!length) { | |
1709 | op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE; | |
1710 | length = &zero; | |
1711 | } else { | |
1712 | op = CEPH_OSD_OP_ZERO; | |
1713 | } | |
1714 | ||
1715 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
1716 | ceph_vino(inode), | |
1717 | offset, length, | |
715e4cd4 | 1718 | 0, 1, op, |
54ea0046 | 1719 | CEPH_OSD_FLAG_WRITE, |
ad7a60de LW |
1720 | NULL, 0, 0, false); |
1721 | if (IS_ERR(req)) { | |
1722 | ret = PTR_ERR(req); | |
1723 | goto out; | |
1724 | } | |
1725 | ||
fac02ddf | 1726 | req->r_mtime = inode->i_mtime; |
ad7a60de LW |
1727 | ret = ceph_osdc_start_request(&fsc->client->osdc, req, false); |
1728 | if (!ret) { | |
1729 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
1730 | if (ret == -ENOENT) | |
1731 | ret = 0; | |
1732 | } | |
1733 | ceph_osdc_put_request(req); | |
1734 | ||
1735 | out: | |
1736 | return ret; | |
1737 | } | |
1738 | ||
1739 | static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length) | |
1740 | { | |
1741 | int ret = 0; | |
1742 | struct ceph_inode_info *ci = ceph_inode(inode); | |
7627151e YZ |
1743 | s32 stripe_unit = ci->i_layout.stripe_unit; |
1744 | s32 stripe_count = ci->i_layout.stripe_count; | |
1745 | s32 object_size = ci->i_layout.object_size; | |
b314a90d SW |
1746 | u64 object_set_size = object_size * stripe_count; |
1747 | u64 nearly, t; | |
1748 | ||
1749 | /* round offset up to next period boundary */ | |
1750 | nearly = offset + object_set_size - 1; | |
1751 | t = nearly; | |
1752 | nearly -= do_div(t, object_set_size); | |
ad7a60de | 1753 | |
ad7a60de LW |
1754 | while (length && offset < nearly) { |
1755 | loff_t size = length; | |
1756 | ret = ceph_zero_partial_object(inode, offset, &size); | |
1757 | if (ret < 0) | |
1758 | return ret; | |
1759 | offset += size; | |
1760 | length -= size; | |
1761 | } | |
1762 | while (length >= object_set_size) { | |
1763 | int i; | |
1764 | loff_t pos = offset; | |
1765 | for (i = 0; i < stripe_count; ++i) { | |
1766 | ret = ceph_zero_partial_object(inode, pos, NULL); | |
1767 | if (ret < 0) | |
1768 | return ret; | |
1769 | pos += stripe_unit; | |
1770 | } | |
1771 | offset += object_set_size; | |
1772 | length -= object_set_size; | |
1773 | } | |
1774 | while (length) { | |
1775 | loff_t size = length; | |
1776 | ret = ceph_zero_partial_object(inode, offset, &size); | |
1777 | if (ret < 0) | |
1778 | return ret; | |
1779 | offset += size; | |
1780 | length -= size; | |
1781 | } | |
1782 | return ret; | |
1783 | } | |
1784 | ||
1785 | static long ceph_fallocate(struct file *file, int mode, | |
1786 | loff_t offset, loff_t length) | |
1787 | { | |
1788 | struct ceph_file_info *fi = file->private_data; | |
aa8b60e0 | 1789 | struct inode *inode = file_inode(file); |
ad7a60de | 1790 | struct ceph_inode_info *ci = ceph_inode(inode); |
f66fd9f0 | 1791 | struct ceph_cap_flush *prealloc_cf; |
ad7a60de LW |
1792 | int want, got = 0; |
1793 | int dirty; | |
1794 | int ret = 0; | |
1795 | loff_t endoff = 0; | |
1796 | loff_t size; | |
1797 | ||
bddff633 | 1798 | if (mode != (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
494d77bf YZ |
1799 | return -EOPNOTSUPP; |
1800 | ||
ad7a60de LW |
1801 | if (!S_ISREG(inode->i_mode)) |
1802 | return -EOPNOTSUPP; | |
1803 | ||
f66fd9f0 YZ |
1804 | prealloc_cf = ceph_alloc_cap_flush(); |
1805 | if (!prealloc_cf) | |
1806 | return -ENOMEM; | |
1807 | ||
5955102c | 1808 | inode_lock(inode); |
ad7a60de LW |
1809 | |
1810 | if (ceph_snap(inode) != CEPH_NOSNAP) { | |
1811 | ret = -EROFS; | |
1812 | goto unlock; | |
1813 | } | |
1814 | ||
28127bdd YZ |
1815 | if (ci->i_inline_version != CEPH_INLINE_NONE) { |
1816 | ret = ceph_uninline_data(file, NULL); | |
1817 | if (ret < 0) | |
1818 | goto unlock; | |
1819 | } | |
1820 | ||
ad7a60de | 1821 | size = i_size_read(inode); |
bddff633 LH |
1822 | |
1823 | /* Are we punching a hole beyond EOF? */ | |
1824 | if (offset >= size) | |
1825 | goto unlock; | |
1826 | if ((offset + length) > size) | |
1827 | length = size - offset; | |
ad7a60de LW |
1828 | |
1829 | if (fi->fmode & CEPH_FILE_MODE_LAZY) | |
1830 | want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; | |
1831 | else | |
1832 | want = CEPH_CAP_FILE_BUFFER; | |
1833 | ||
5e3ded1b | 1834 | ret = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, endoff, &got, NULL); |
ad7a60de LW |
1835 | if (ret < 0) |
1836 | goto unlock; | |
1837 | ||
bddff633 LH |
1838 | ceph_zero_pagecache_range(inode, offset, length); |
1839 | ret = ceph_zero_objects(inode, offset, length); | |
ad7a60de LW |
1840 | |
1841 | if (!ret) { | |
1842 | spin_lock(&ci->i_ceph_lock); | |
28127bdd | 1843 | ci->i_inline_version = CEPH_INLINE_NONE; |
f66fd9f0 YZ |
1844 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
1845 | &prealloc_cf); | |
ad7a60de LW |
1846 | spin_unlock(&ci->i_ceph_lock); |
1847 | if (dirty) | |
1848 | __mark_inode_dirty(inode, dirty); | |
1849 | } | |
1850 | ||
1851 | ceph_put_cap_refs(ci, got); | |
1852 | unlock: | |
5955102c | 1853 | inode_unlock(inode); |
f66fd9f0 | 1854 | ceph_free_cap_flush(prealloc_cf); |
ad7a60de LW |
1855 | return ret; |
1856 | } | |
1857 | ||
503f82a9 LH |
1858 | /* |
1859 | * This function tries to get FILE_WR capabilities for dst_ci and FILE_RD for | |
1860 | * src_ci. Two attempts are made to obtain both caps, and an error is return if | |
1861 | * this fails; zero is returned on success. | |
1862 | */ | |
5e3ded1b YZ |
1863 | static int get_rd_wr_caps(struct file *src_filp, int *src_got, |
1864 | struct file *dst_filp, | |
503f82a9 LH |
1865 | loff_t dst_endoff, int *dst_got) |
1866 | { | |
1867 | int ret = 0; | |
1868 | bool retrying = false; | |
1869 | ||
1870 | retry_caps: | |
5e3ded1b | 1871 | ret = ceph_get_caps(dst_filp, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER, |
503f82a9 LH |
1872 | dst_endoff, dst_got, NULL); |
1873 | if (ret < 0) | |
1874 | return ret; | |
1875 | ||
1876 | /* | |
1877 | * Since we're already holding the FILE_WR capability for the dst file, | |
1878 | * we would risk a deadlock by using ceph_get_caps. Thus, we'll do some | |
1879 | * retry dance instead to try to get both capabilities. | |
1880 | */ | |
5e3ded1b YZ |
1881 | ret = ceph_try_get_caps(file_inode(src_filp), |
1882 | CEPH_CAP_FILE_RD, CEPH_CAP_FILE_SHARED, | |
503f82a9 LH |
1883 | false, src_got); |
1884 | if (ret <= 0) { | |
1885 | /* Start by dropping dst_ci caps and getting src_ci caps */ | |
5e3ded1b | 1886 | ceph_put_cap_refs(ceph_inode(file_inode(dst_filp)), *dst_got); |
503f82a9 LH |
1887 | if (retrying) { |
1888 | if (!ret) | |
1889 | /* ceph_try_get_caps masks EAGAIN */ | |
1890 | ret = -EAGAIN; | |
1891 | return ret; | |
1892 | } | |
5e3ded1b YZ |
1893 | ret = ceph_get_caps(src_filp, CEPH_CAP_FILE_RD, |
1894 | CEPH_CAP_FILE_SHARED, -1, src_got, NULL); | |
503f82a9 LH |
1895 | if (ret < 0) |
1896 | return ret; | |
1897 | /*... drop src_ci caps too, and retry */ | |
5e3ded1b | 1898 | ceph_put_cap_refs(ceph_inode(file_inode(src_filp)), *src_got); |
503f82a9 LH |
1899 | retrying = true; |
1900 | goto retry_caps; | |
1901 | } | |
1902 | return ret; | |
1903 | } | |
1904 | ||
1905 | static void put_rd_wr_caps(struct ceph_inode_info *src_ci, int src_got, | |
1906 | struct ceph_inode_info *dst_ci, int dst_got) | |
1907 | { | |
1908 | ceph_put_cap_refs(src_ci, src_got); | |
1909 | ceph_put_cap_refs(dst_ci, dst_got); | |
1910 | } | |
1911 | ||
1912 | /* | |
1913 | * This function does several size-related checks, returning an error if: | |
1914 | * - source file is smaller than off+len | |
1915 | * - destination file size is not OK (inode_newsize_ok()) | |
1916 | * - max bytes quotas is exceeded | |
1917 | */ | |
1918 | static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode, | |
1919 | loff_t src_off, loff_t dst_off, size_t len) | |
1920 | { | |
1921 | loff_t size, endoff; | |
1922 | ||
1923 | size = i_size_read(src_inode); | |
1924 | /* | |
1925 | * Don't copy beyond source file EOF. Instead of simply setting length | |
1926 | * to (size - src_off), just drop to VFS default implementation, as the | |
1927 | * local i_size may be stale due to other clients writing to the source | |
1928 | * inode. | |
1929 | */ | |
1930 | if (src_off + len > size) { | |
1931 | dout("Copy beyond EOF (%llu + %zu > %llu)\n", | |
1932 | src_off, len, size); | |
1933 | return -EOPNOTSUPP; | |
1934 | } | |
1935 | size = i_size_read(dst_inode); | |
1936 | ||
1937 | endoff = dst_off + len; | |
1938 | if (inode_newsize_ok(dst_inode, endoff)) | |
1939 | return -EOPNOTSUPP; | |
1940 | ||
1941 | if (ceph_quota_is_max_bytes_exceeded(dst_inode, endoff)) | |
1942 | return -EDQUOT; | |
1943 | ||
1944 | return 0; | |
1945 | } | |
1946 | ||
64bf5ff5 DC |
1947 | static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off, |
1948 | struct file *dst_file, loff_t dst_off, | |
1949 | size_t len, unsigned int flags) | |
503f82a9 LH |
1950 | { |
1951 | struct inode *src_inode = file_inode(src_file); | |
1952 | struct inode *dst_inode = file_inode(dst_file); | |
1953 | struct ceph_inode_info *src_ci = ceph_inode(src_inode); | |
1954 | struct ceph_inode_info *dst_ci = ceph_inode(dst_inode); | |
1955 | struct ceph_cap_flush *prealloc_cf; | |
6fd4e634 | 1956 | struct ceph_fs_client *src_fsc = ceph_inode_to_client(src_inode); |
503f82a9 LH |
1957 | struct ceph_object_locator src_oloc, dst_oloc; |
1958 | struct ceph_object_id src_oid, dst_oid; | |
1959 | loff_t endoff = 0, size; | |
1960 | ssize_t ret = -EIO; | |
1961 | u64 src_objnum, dst_objnum, src_objoff, dst_objoff; | |
1962 | u32 src_objlen, dst_objlen, object_size; | |
1963 | int src_got = 0, dst_got = 0, err, dirty; | |
1964 | bool do_final_copy = false; | |
1965 | ||
6fd4e634 LH |
1966 | if (src_inode->i_sb != dst_inode->i_sb) { |
1967 | struct ceph_fs_client *dst_fsc = ceph_inode_to_client(dst_inode); | |
1968 | ||
1969 | if (ceph_fsid_compare(&src_fsc->client->fsid, | |
1970 | &dst_fsc->client->fsid)) { | |
1971 | dout("Copying files across clusters: src: %pU dst: %pU\n", | |
1972 | &src_fsc->client->fsid, &dst_fsc->client->fsid); | |
1973 | return -EXDEV; | |
1974 | } | |
1975 | } | |
503f82a9 LH |
1976 | if (ceph_snap(dst_inode) != CEPH_NOSNAP) |
1977 | return -EROFS; | |
1978 | ||
1979 | /* | |
1980 | * Some of the checks below will return -EOPNOTSUPP, which will force a | |
1981 | * fallback to the default VFS copy_file_range implementation. This is | |
1982 | * desirable in several cases (for ex, the 'len' is smaller than the | |
1983 | * size of the objects, or in cases where that would be more | |
1984 | * efficient). | |
1985 | */ | |
1986 | ||
6fd4e634 | 1987 | if (ceph_test_mount_opt(src_fsc, NOCOPYFROM)) |
ea4cdc54 LH |
1988 | return -EOPNOTSUPP; |
1989 | ||
a3a08193 LH |
1990 | /* |
1991 | * Striped file layouts require that we copy partial objects, but the | |
1992 | * OSD copy-from operation only supports full-object copies. Limit | |
1993 | * this to non-striped file layouts for now. | |
1994 | */ | |
503f82a9 | 1995 | if ((src_ci->i_layout.stripe_unit != dst_ci->i_layout.stripe_unit) || |
a3a08193 LH |
1996 | (src_ci->i_layout.stripe_count != 1) || |
1997 | (dst_ci->i_layout.stripe_count != 1) || | |
1998 | (src_ci->i_layout.object_size != dst_ci->i_layout.object_size)) { | |
1999 | dout("Invalid src/dst files layout\n"); | |
503f82a9 | 2000 | return -EOPNOTSUPP; |
a3a08193 | 2001 | } |
503f82a9 LH |
2002 | |
2003 | if (len < src_ci->i_layout.object_size) | |
2004 | return -EOPNOTSUPP; /* no remote copy will be done */ | |
2005 | ||
2006 | prealloc_cf = ceph_alloc_cap_flush(); | |
2007 | if (!prealloc_cf) | |
2008 | return -ENOMEM; | |
2009 | ||
c2c6d3ce | 2010 | /* Start by sync'ing the source and destination files */ |
503f82a9 | 2011 | ret = file_write_and_wait_range(src_file, src_off, (src_off + len)); |
c2c6d3ce LH |
2012 | if (ret < 0) { |
2013 | dout("failed to write src file (%zd)\n", ret); | |
2014 | goto out; | |
2015 | } | |
2016 | ret = file_write_and_wait_range(dst_file, dst_off, (dst_off + len)); | |
2017 | if (ret < 0) { | |
2018 | dout("failed to write dst file (%zd)\n", ret); | |
503f82a9 | 2019 | goto out; |
c2c6d3ce | 2020 | } |
503f82a9 LH |
2021 | |
2022 | /* | |
2023 | * We need FILE_WR caps for dst_ci and FILE_RD for src_ci as other | |
2024 | * clients may have dirty data in their caches. And OSDs know nothing | |
2025 | * about caps, so they can't safely do the remote object copies. | |
2026 | */ | |
5e3ded1b YZ |
2027 | err = get_rd_wr_caps(src_file, &src_got, |
2028 | dst_file, (dst_off + len), &dst_got); | |
503f82a9 LH |
2029 | if (err < 0) { |
2030 | dout("get_rd_wr_caps returned %d\n", err); | |
2031 | ret = -EOPNOTSUPP; | |
2032 | goto out; | |
2033 | } | |
2034 | ||
2035 | ret = is_file_size_ok(src_inode, dst_inode, src_off, dst_off, len); | |
2036 | if (ret < 0) | |
2037 | goto out_caps; | |
2038 | ||
2039 | size = i_size_read(dst_inode); | |
2040 | endoff = dst_off + len; | |
2041 | ||
2042 | /* Drop dst file cached pages */ | |
2043 | ret = invalidate_inode_pages2_range(dst_inode->i_mapping, | |
2044 | dst_off >> PAGE_SHIFT, | |
2045 | endoff >> PAGE_SHIFT); | |
2046 | if (ret < 0) { | |
2047 | dout("Failed to invalidate inode pages (%zd)\n", ret); | |
2048 | ret = 0; /* XXX */ | |
2049 | } | |
2050 | src_oloc.pool = src_ci->i_layout.pool_id; | |
2051 | src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns); | |
2052 | dst_oloc.pool = dst_ci->i_layout.pool_id; | |
2053 | dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns); | |
2054 | ||
2055 | ceph_calc_file_object_mapping(&src_ci->i_layout, src_off, | |
2056 | src_ci->i_layout.object_size, | |
2057 | &src_objnum, &src_objoff, &src_objlen); | |
2058 | ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off, | |
2059 | dst_ci->i_layout.object_size, | |
2060 | &dst_objnum, &dst_objoff, &dst_objlen); | |
2061 | /* object-level offsets need to the same */ | |
2062 | if (src_objoff != dst_objoff) { | |
2063 | ret = -EOPNOTSUPP; | |
2064 | goto out_caps; | |
2065 | } | |
2066 | ||
2067 | /* | |
2068 | * Do a manual copy if the object offset isn't object aligned. | |
2069 | * 'src_objlen' contains the bytes left until the end of the object, | |
2070 | * starting at the src_off | |
2071 | */ | |
2072 | if (src_objoff) { | |
2073 | /* | |
2074 | * we need to temporarily drop all caps as we'll be calling | |
2075 | * {read,write}_iter, which will get caps again. | |
2076 | */ | |
2077 | put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got); | |
2078 | ret = do_splice_direct(src_file, &src_off, dst_file, | |
2079 | &dst_off, src_objlen, flags); | |
2080 | if (ret < 0) { | |
2081 | dout("do_splice_direct returned %d\n", err); | |
2082 | goto out; | |
2083 | } | |
2084 | len -= ret; | |
5e3ded1b YZ |
2085 | err = get_rd_wr_caps(src_file, &src_got, |
2086 | dst_file, (dst_off + len), &dst_got); | |
503f82a9 LH |
2087 | if (err < 0) |
2088 | goto out; | |
2089 | err = is_file_size_ok(src_inode, dst_inode, | |
2090 | src_off, dst_off, len); | |
2091 | if (err < 0) | |
2092 | goto out_caps; | |
2093 | } | |
2094 | object_size = src_ci->i_layout.object_size; | |
2095 | while (len >= object_size) { | |
2096 | ceph_calc_file_object_mapping(&src_ci->i_layout, src_off, | |
2097 | object_size, &src_objnum, | |
2098 | &src_objoff, &src_objlen); | |
2099 | ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off, | |
2100 | object_size, &dst_objnum, | |
2101 | &dst_objoff, &dst_objlen); | |
2102 | ceph_oid_init(&src_oid); | |
2103 | ceph_oid_printf(&src_oid, "%llx.%08llx", | |
2104 | src_ci->i_vino.ino, src_objnum); | |
2105 | ceph_oid_init(&dst_oid); | |
2106 | ceph_oid_printf(&dst_oid, "%llx.%08llx", | |
2107 | dst_ci->i_vino.ino, dst_objnum); | |
2108 | /* Do an object remote copy */ | |
2109 | err = ceph_osdc_copy_from( | |
6fd4e634 | 2110 | &src_fsc->client->osdc, |
503f82a9 LH |
2111 | src_ci->i_vino.snap, 0, |
2112 | &src_oid, &src_oloc, | |
2113 | CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL | | |
2114 | CEPH_OSD_OP_FLAG_FADVISE_NOCACHE, | |
2115 | &dst_oid, &dst_oloc, | |
2116 | CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL | | |
2117 | CEPH_OSD_OP_FLAG_FADVISE_DONTNEED, 0); | |
2118 | if (err) { | |
2119 | dout("ceph_osdc_copy_from returned %d\n", err); | |
2120 | if (!ret) | |
2121 | ret = err; | |
2122 | goto out_caps; | |
2123 | } | |
2124 | len -= object_size; | |
2125 | src_off += object_size; | |
2126 | dst_off += object_size; | |
2127 | ret += object_size; | |
2128 | } | |
2129 | ||
2130 | if (len) | |
2131 | /* We still need one final local copy */ | |
2132 | do_final_copy = true; | |
2133 | ||
2134 | file_update_time(dst_file); | |
5c308356 JL |
2135 | inode_inc_iversion_raw(dst_inode); |
2136 | ||
503f82a9 LH |
2137 | if (endoff > size) { |
2138 | int caps_flags = 0; | |
2139 | ||
2140 | /* Let the MDS know about dst file size change */ | |
2141 | if (ceph_quota_is_max_bytes_approaching(dst_inode, endoff)) | |
2142 | caps_flags |= CHECK_CAPS_NODELAY; | |
2143 | if (ceph_inode_set_size(dst_inode, endoff)) | |
2144 | caps_flags |= CHECK_CAPS_AUTHONLY; | |
2145 | if (caps_flags) | |
2146 | ceph_check_caps(dst_ci, caps_flags, NULL); | |
2147 | } | |
2148 | /* Mark Fw dirty */ | |
2149 | spin_lock(&dst_ci->i_ceph_lock); | |
2150 | dst_ci->i_inline_version = CEPH_INLINE_NONE; | |
2151 | dirty = __ceph_mark_dirty_caps(dst_ci, CEPH_CAP_FILE_WR, &prealloc_cf); | |
2152 | spin_unlock(&dst_ci->i_ceph_lock); | |
2153 | if (dirty) | |
2154 | __mark_inode_dirty(dst_inode, dirty); | |
2155 | ||
2156 | out_caps: | |
2157 | put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got); | |
2158 | ||
2159 | if (do_final_copy) { | |
2160 | err = do_splice_direct(src_file, &src_off, dst_file, | |
2161 | &dst_off, len, flags); | |
2162 | if (err < 0) { | |
2163 | dout("do_splice_direct returned %d\n", err); | |
2164 | goto out; | |
2165 | } | |
2166 | len -= err; | |
2167 | ret += err; | |
2168 | } | |
2169 | ||
2170 | out: | |
2171 | ceph_free_cap_flush(prealloc_cf); | |
2172 | ||
2173 | return ret; | |
2174 | } | |
2175 | ||
64bf5ff5 DC |
2176 | static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off, |
2177 | struct file *dst_file, loff_t dst_off, | |
2178 | size_t len, unsigned int flags) | |
2179 | { | |
2180 | ssize_t ret; | |
2181 | ||
2182 | ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off, | |
2183 | len, flags); | |
2184 | ||
5dae222a | 2185 | if (ret == -EOPNOTSUPP || ret == -EXDEV) |
64bf5ff5 DC |
2186 | ret = generic_copy_file_range(src_file, src_off, dst_file, |
2187 | dst_off, len, flags); | |
2188 | return ret; | |
2189 | } | |
2190 | ||
124e68e7 SW |
2191 | const struct file_operations ceph_file_fops = { |
2192 | .open = ceph_open, | |
2193 | .release = ceph_release, | |
2194 | .llseek = ceph_llseek, | |
3644424d | 2195 | .read_iter = ceph_read_iter, |
4908b822 | 2196 | .write_iter = ceph_write_iter, |
124e68e7 SW |
2197 | .mmap = ceph_mmap, |
2198 | .fsync = ceph_fsync, | |
40819f6f GF |
2199 | .lock = ceph_lock, |
2200 | .flock = ceph_flock, | |
7ce469a5 | 2201 | .splice_read = generic_file_splice_read, |
3551dd79 | 2202 | .splice_write = iter_file_splice_write, |
124e68e7 | 2203 | .unlocked_ioctl = ceph_ioctl, |
c983d397 | 2204 | .compat_ioctl = compat_ptr_ioctl, |
ad7a60de | 2205 | .fallocate = ceph_fallocate, |
503f82a9 | 2206 | .copy_file_range = ceph_copy_file_range, |
124e68e7 | 2207 | }; |