Commit | Line | Data |
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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> |
97e27aaa | 14 | #include <linux/ktime.h> |
124e68e7 SW |
15 | |
16 | #include "super.h" | |
17 | #include "mds_client.h" | |
99ccbd22 | 18 | #include "cache.h" |
321fe13c | 19 | #include "io.h" |
97e27aaa | 20 | #include "metric.h" |
124e68e7 | 21 | |
f775ff7d AG |
22 | static __le32 ceph_flags_sys2wire(u32 flags) |
23 | { | |
24 | u32 wire_flags = 0; | |
25 | ||
26 | switch (flags & O_ACCMODE) { | |
27 | case O_RDONLY: | |
28 | wire_flags |= CEPH_O_RDONLY; | |
29 | break; | |
30 | case O_WRONLY: | |
31 | wire_flags |= CEPH_O_WRONLY; | |
32 | break; | |
33 | case O_RDWR: | |
34 | wire_flags |= CEPH_O_RDWR; | |
35 | break; | |
36 | } | |
37 | ||
51b10f3f CX |
38 | flags &= ~O_ACCMODE; |
39 | ||
f775ff7d AG |
40 | #define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; } |
41 | ||
42 | ceph_sys2wire(O_CREAT); | |
43 | ceph_sys2wire(O_EXCL); | |
44 | ceph_sys2wire(O_TRUNC); | |
45 | ceph_sys2wire(O_DIRECTORY); | |
46 | ceph_sys2wire(O_NOFOLLOW); | |
47 | ||
48 | #undef ceph_sys2wire | |
49 | ||
50 | if (flags) | |
4c069a58 | 51 | dout("unused open flags: %x\n", flags); |
f775ff7d AG |
52 | |
53 | return cpu_to_le32(wire_flags); | |
54 | } | |
55 | ||
124e68e7 SW |
56 | /* |
57 | * Ceph file operations | |
58 | * | |
59 | * Implement basic open/close functionality, and implement | |
60 | * read/write. | |
61 | * | |
62 | * We implement three modes of file I/O: | |
63 | * - buffered uses the generic_file_aio_{read,write} helpers | |
64 | * | |
65 | * - synchronous is used when there is multi-client read/write | |
66 | * sharing, avoids the page cache, and synchronously waits for an | |
67 | * ack from the OSD. | |
68 | * | |
69 | * - direct io takes the variant of the sync path that references | |
70 | * user pages directly. | |
71 | * | |
72 | * fsync() flushes and waits on dirty pages, but just queues metadata | |
73 | * for writeback: since the MDS can recover size and mtime there is no | |
74 | * need to wait for MDS acknowledgement. | |
75 | */ | |
76 | ||
b5b98989 | 77 | /* |
fc218544 ID |
78 | * How many pages to get in one call to iov_iter_get_pages(). This |
79 | * determines the size of the on-stack array used as a buffer. | |
b5b98989 | 80 | */ |
fc218544 ID |
81 | #define ITER_GET_BVECS_PAGES 64 |
82 | ||
83 | static ssize_t __iter_get_bvecs(struct iov_iter *iter, size_t maxsize, | |
84 | struct bio_vec *bvecs) | |
b5b98989 | 85 | { |
fc218544 ID |
86 | size_t size = 0; |
87 | int bvec_idx = 0; | |
88 | ||
89 | if (maxsize > iov_iter_count(iter)) | |
90 | maxsize = iov_iter_count(iter); | |
91 | ||
92 | while (size < maxsize) { | |
93 | struct page *pages[ITER_GET_BVECS_PAGES]; | |
94 | ssize_t bytes; | |
95 | size_t start; | |
96 | int idx = 0; | |
97 | ||
98 | bytes = iov_iter_get_pages(iter, pages, maxsize - size, | |
99 | ITER_GET_BVECS_PAGES, &start); | |
100 | if (bytes < 0) | |
101 | return size ?: bytes; | |
102 | ||
103 | iov_iter_advance(iter, bytes); | |
104 | size += bytes; | |
105 | ||
106 | for ( ; bytes; idx++, bvec_idx++) { | |
107 | struct bio_vec bv = { | |
108 | .bv_page = pages[idx], | |
109 | .bv_len = min_t(int, bytes, PAGE_SIZE - start), | |
110 | .bv_offset = start, | |
111 | }; | |
112 | ||
113 | bvecs[bvec_idx] = bv; | |
114 | bytes -= bv.bv_len; | |
115 | start = 0; | |
116 | } | |
117 | } | |
118 | ||
119 | return size; | |
b5b98989 ZC |
120 | } |
121 | ||
122 | /* | |
fc218544 ID |
123 | * iov_iter_get_pages() only considers one iov_iter segment, no matter |
124 | * what maxsize or maxpages are given. For ITER_BVEC that is a single | |
125 | * page. | |
126 | * | |
127 | * Attempt to get up to @maxsize bytes worth of pages from @iter. | |
128 | * Return the number of bytes in the created bio_vec array, or an error. | |
b5b98989 | 129 | */ |
fc218544 ID |
130 | static ssize_t iter_get_bvecs_alloc(struct iov_iter *iter, size_t maxsize, |
131 | struct bio_vec **bvecs, int *num_bvecs) | |
b5b98989 | 132 | { |
fc218544 ID |
133 | struct bio_vec *bv; |
134 | size_t orig_count = iov_iter_count(iter); | |
135 | ssize_t bytes; | |
136 | int npages; | |
b5b98989 | 137 | |
fc218544 ID |
138 | iov_iter_truncate(iter, maxsize); |
139 | npages = iov_iter_npages(iter, INT_MAX); | |
140 | iov_iter_reexpand(iter, orig_count); | |
b5b98989 | 141 | |
fc218544 ID |
142 | /* |
143 | * __iter_get_bvecs() may populate only part of the array -- zero it | |
144 | * out. | |
145 | */ | |
146 | bv = kvmalloc_array(npages, sizeof(*bv), GFP_KERNEL | __GFP_ZERO); | |
147 | if (!bv) | |
148 | return -ENOMEM; | |
b5b98989 | 149 | |
fc218544 ID |
150 | bytes = __iter_get_bvecs(iter, maxsize, bv); |
151 | if (bytes < 0) { | |
152 | /* | |
153 | * No pages were pinned -- just free the array. | |
154 | */ | |
155 | kvfree(bv); | |
156 | return bytes; | |
b5b98989 ZC |
157 | } |
158 | ||
fc218544 ID |
159 | *bvecs = bv; |
160 | *num_bvecs = npages; | |
161 | return bytes; | |
162 | } | |
163 | ||
164 | static void put_bvecs(struct bio_vec *bvecs, int num_bvecs, bool should_dirty) | |
165 | { | |
166 | int i; | |
167 | ||
168 | for (i = 0; i < num_bvecs; i++) { | |
169 | if (bvecs[i].bv_page) { | |
170 | if (should_dirty) | |
171 | set_page_dirty_lock(bvecs[i].bv_page); | |
172 | put_page(bvecs[i].bv_page); | |
173 | } | |
174 | } | |
175 | kvfree(bvecs); | |
b5b98989 | 176 | } |
124e68e7 SW |
177 | |
178 | /* | |
179 | * Prepare an open request. Preallocate ceph_cap to avoid an | |
180 | * inopportune ENOMEM later. | |
181 | */ | |
182 | static struct ceph_mds_request * | |
183 | prepare_open_request(struct super_block *sb, int flags, int create_mode) | |
184 | { | |
2678da88 | 185 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb); |
124e68e7 SW |
186 | struct ceph_mds_request *req; |
187 | int want_auth = USE_ANY_MDS; | |
188 | int op = (flags & O_CREAT) ? CEPH_MDS_OP_CREATE : CEPH_MDS_OP_OPEN; | |
189 | ||
190 | if (flags & (O_WRONLY|O_RDWR|O_CREAT|O_TRUNC)) | |
191 | want_auth = USE_AUTH_MDS; | |
192 | ||
193 | req = ceph_mdsc_create_request(mdsc, op, want_auth); | |
194 | if (IS_ERR(req)) | |
195 | goto out; | |
196 | req->r_fmode = ceph_flags_to_mode(flags); | |
f775ff7d | 197 | req->r_args.open.flags = ceph_flags_sys2wire(flags); |
124e68e7 | 198 | req->r_args.open.mode = cpu_to_le32(create_mode); |
124e68e7 SW |
199 | out: |
200 | return req; | |
201 | } | |
202 | ||
bb48bd4d CX |
203 | static int ceph_init_file_info(struct inode *inode, struct file *file, |
204 | int fmode, bool isdir) | |
205 | { | |
f4b97866 | 206 | struct ceph_inode_info *ci = ceph_inode(inode); |
bb48bd4d CX |
207 | struct ceph_file_info *fi; |
208 | ||
209 | dout("%s %p %p 0%o (%s)\n", __func__, inode, file, | |
210 | inode->i_mode, isdir ? "dir" : "regular"); | |
211 | BUG_ON(inode->i_fop->release != ceph_release); | |
212 | ||
213 | if (isdir) { | |
214 | struct ceph_dir_file_info *dfi = | |
215 | kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL); | |
135e671e | 216 | if (!dfi) |
bb48bd4d | 217 | return -ENOMEM; |
bb48bd4d CX |
218 | |
219 | file->private_data = dfi; | |
220 | fi = &dfi->file_info; | |
221 | dfi->next_offset = 2; | |
222 | dfi->readdir_cache_idx = -1; | |
223 | } else { | |
224 | fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL); | |
135e671e | 225 | if (!fi) |
bb48bd4d | 226 | return -ENOMEM; |
bb48bd4d CX |
227 | |
228 | file->private_data = fi; | |
229 | } | |
230 | ||
135e671e | 231 | ceph_get_fmode(ci, fmode, 1); |
bb48bd4d | 232 | fi->fmode = fmode; |
135e671e | 233 | |
bb48bd4d CX |
234 | spin_lock_init(&fi->rw_contexts_lock); |
235 | INIT_LIST_HEAD(&fi->rw_contexts); | |
f4b97866 | 236 | fi->meta_err = errseq_sample(&ci->i_meta_err); |
81f148a9 | 237 | fi->filp_gen = READ_ONCE(ceph_inode_to_client(inode)->filp_gen); |
bb48bd4d CX |
238 | |
239 | return 0; | |
240 | } | |
241 | ||
124e68e7 SW |
242 | /* |
243 | * initialize private struct file data. | |
244 | * if we fail, clean up by dropping fmode reference on the ceph_inode | |
245 | */ | |
246 | static int ceph_init_file(struct inode *inode, struct file *file, int fmode) | |
247 | { | |
124e68e7 SW |
248 | int ret = 0; |
249 | ||
250 | switch (inode->i_mode & S_IFMT) { | |
251 | case S_IFREG: | |
46b59b2b YZ |
252 | ceph_fscache_register_inode_cookie(inode); |
253 | ceph_fscache_file_set_cookie(inode, file); | |
df561f66 | 254 | fallthrough; |
124e68e7 | 255 | case S_IFDIR: |
bb48bd4d CX |
256 | ret = ceph_init_file_info(inode, file, fmode, |
257 | S_ISDIR(inode->i_mode)); | |
124e68e7 SW |
258 | break; |
259 | ||
260 | case S_IFLNK: | |
261 | dout("init_file %p %p 0%o (symlink)\n", inode, file, | |
262 | inode->i_mode); | |
124e68e7 SW |
263 | break; |
264 | ||
265 | default: | |
266 | dout("init_file %p %p 0%o (special)\n", inode, file, | |
267 | inode->i_mode); | |
268 | /* | |
269 | * we need to drop the open ref now, since we don't | |
270 | * have .release set to ceph_release. | |
271 | */ | |
124e68e7 SW |
272 | BUG_ON(inode->i_fop->release == ceph_release); |
273 | ||
274 | /* call the proper open fop */ | |
275 | ret = inode->i_fop->open(inode, file); | |
276 | } | |
277 | return ret; | |
278 | } | |
279 | ||
77310320 YZ |
280 | /* |
281 | * try renew caps after session gets killed. | |
282 | */ | |
719a2514 | 283 | int ceph_renew_caps(struct inode *inode, int fmode) |
77310320 | 284 | { |
2678da88 | 285 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); |
77310320 YZ |
286 | struct ceph_inode_info *ci = ceph_inode(inode); |
287 | struct ceph_mds_request *req; | |
288 | int err, flags, wanted; | |
289 | ||
290 | spin_lock(&ci->i_ceph_lock); | |
719a2514 | 291 | __ceph_touch_fmode(ci, mdsc, fmode); |
77310320 YZ |
292 | wanted = __ceph_caps_file_wanted(ci); |
293 | if (__ceph_is_any_real_caps(ci) && | |
8242c9f3 | 294 | (!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) { |
77310320 YZ |
295 | int issued = __ceph_caps_issued(ci, NULL); |
296 | spin_unlock(&ci->i_ceph_lock); | |
297 | dout("renew caps %p want %s issued %s updating mds_wanted\n", | |
298 | inode, ceph_cap_string(wanted), ceph_cap_string(issued)); | |
299 | ceph_check_caps(ci, 0, NULL); | |
300 | return 0; | |
301 | } | |
302 | spin_unlock(&ci->i_ceph_lock); | |
303 | ||
304 | flags = 0; | |
305 | if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR)) | |
306 | flags = O_RDWR; | |
307 | else if (wanted & CEPH_CAP_FILE_RD) | |
308 | flags = O_RDONLY; | |
309 | else if (wanted & CEPH_CAP_FILE_WR) | |
310 | flags = O_WRONLY; | |
311 | #ifdef O_LAZY | |
312 | if (wanted & CEPH_CAP_FILE_LAZYIO) | |
313 | flags |= O_LAZY; | |
314 | #endif | |
315 | ||
316 | req = prepare_open_request(inode->i_sb, flags, 0); | |
317 | if (IS_ERR(req)) { | |
318 | err = PTR_ERR(req); | |
319 | goto out; | |
320 | } | |
321 | ||
322 | req->r_inode = inode; | |
323 | ihold(inode); | |
324 | req->r_num_caps = 1; | |
77310320 YZ |
325 | |
326 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
327 | ceph_mdsc_put_request(req); | |
328 | out: | |
329 | dout("renew caps %p open result=%d\n", inode, err); | |
330 | return err < 0 ? err : 0; | |
331 | } | |
332 | ||
124e68e7 | 333 | /* |
124e68e7 SW |
334 | * If we already have the requisite capabilities, we can satisfy |
335 | * the open request locally (no need to request new caps from the | |
336 | * MDS). We do, however, need to inform the MDS (asynchronously) | |
337 | * if our wanted caps set expands. | |
338 | */ | |
339 | int ceph_open(struct inode *inode, struct file *file) | |
340 | { | |
341 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3d14c5d2 YS |
342 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
343 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
124e68e7 | 344 | struct ceph_mds_request *req; |
73737682 | 345 | struct ceph_file_info *fi = file->private_data; |
124e68e7 SW |
346 | int err; |
347 | int flags, fmode, wanted; | |
348 | ||
73737682 | 349 | if (fi) { |
124e68e7 SW |
350 | dout("open file %p is already opened\n", file); |
351 | return 0; | |
352 | } | |
353 | ||
354 | /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */ | |
355 | flags = file->f_flags & ~(O_CREAT|O_EXCL); | |
356 | if (S_ISDIR(inode->i_mode)) | |
357 | flags = O_DIRECTORY; /* mds likes to know */ | |
358 | ||
359 | dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode, | |
360 | ceph_vinop(inode), file, flags, file->f_flags); | |
361 | fmode = ceph_flags_to_mode(flags); | |
362 | wanted = ceph_caps_for_mode(fmode); | |
363 | ||
364 | /* snapped files are read-only */ | |
365 | if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE)) | |
366 | return -EROFS; | |
367 | ||
368 | /* trivially open snapdir */ | |
369 | if (ceph_snap(inode) == CEPH_SNAPDIR) { | |
124e68e7 SW |
370 | return ceph_init_file(inode, file, fmode); |
371 | } | |
372 | ||
373 | /* | |
7421ab80 SW |
374 | * No need to block if we have caps on the auth MDS (for |
375 | * write) or any MDS (for read). Update wanted set | |
124e68e7 SW |
376 | * asynchronously. |
377 | */ | |
be655596 | 378 | spin_lock(&ci->i_ceph_lock); |
7421ab80 SW |
379 | if (__ceph_is_any_real_caps(ci) && |
380 | (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) { | |
c1944fed | 381 | int mds_wanted = __ceph_caps_mds_wanted(ci, true); |
124e68e7 SW |
382 | int issued = __ceph_caps_issued(ci, NULL); |
383 | ||
384 | dout("open %p fmode %d want %s issued %s using existing\n", | |
385 | inode, fmode, ceph_cap_string(wanted), | |
386 | ceph_cap_string(issued)); | |
135e671e | 387 | __ceph_touch_fmode(ci, mdsc, fmode); |
be655596 | 388 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
389 | |
390 | /* adjust wanted? */ | |
391 | if ((issued & wanted) != wanted && | |
392 | (mds_wanted & wanted) != wanted && | |
393 | ceph_snap(inode) != CEPH_SNAPDIR) | |
394 | ceph_check_caps(ci, 0, NULL); | |
395 | ||
396 | return ceph_init_file(inode, file, fmode); | |
397 | } else if (ceph_snap(inode) != CEPH_NOSNAP && | |
398 | (ci->i_snap_caps & wanted) == wanted) { | |
719a2514 | 399 | __ceph_touch_fmode(ci, mdsc, fmode); |
be655596 | 400 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
401 | return ceph_init_file(inode, file, fmode); |
402 | } | |
99ccbd22 | 403 | |
be655596 | 404 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
405 | |
406 | dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted)); | |
407 | req = prepare_open_request(inode->i_sb, flags, 0); | |
408 | if (IS_ERR(req)) { | |
409 | err = PTR_ERR(req); | |
410 | goto out; | |
411 | } | |
70b666c3 SW |
412 | req->r_inode = inode; |
413 | ihold(inode); | |
99ccbd22 | 414 | |
124e68e7 | 415 | req->r_num_caps = 1; |
e36d571d | 416 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
124e68e7 SW |
417 | if (!err) |
418 | err = ceph_init_file(inode, file, req->r_fmode); | |
419 | ceph_mdsc_put_request(req); | |
420 | dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode)); | |
421 | out: | |
422 | return err; | |
423 | } | |
424 | ||
785892fe JL |
425 | /* Clone the layout from a synchronous create, if the dir now has Dc caps */ |
426 | static void | |
427 | cache_file_layout(struct inode *dst, struct inode *src) | |
428 | { | |
429 | struct ceph_inode_info *cdst = ceph_inode(dst); | |
430 | struct ceph_inode_info *csrc = ceph_inode(src); | |
431 | ||
432 | spin_lock(&cdst->i_ceph_lock); | |
433 | if ((__ceph_caps_issued(cdst, NULL) & CEPH_CAP_DIR_CREATE) && | |
434 | !ceph_file_layout_is_valid(&cdst->i_cached_layout)) { | |
435 | memcpy(&cdst->i_cached_layout, &csrc->i_layout, | |
436 | sizeof(cdst->i_cached_layout)); | |
437 | rcu_assign_pointer(cdst->i_cached_layout.pool_ns, | |
438 | ceph_try_get_string(csrc->i_layout.pool_ns)); | |
439 | } | |
440 | spin_unlock(&cdst->i_ceph_lock); | |
441 | } | |
124e68e7 | 442 | |
9a8d03ca JL |
443 | /* |
444 | * Try to set up an async create. We need caps, a file layout, and inode number, | |
445 | * and either a lease on the dentry or complete dir info. If any of those | |
446 | * criteria are not satisfied, then return false and the caller can go | |
447 | * synchronous. | |
448 | */ | |
449 | static int try_prep_async_create(struct inode *dir, struct dentry *dentry, | |
450 | struct ceph_file_layout *lo, u64 *pino) | |
451 | { | |
452 | struct ceph_inode_info *ci = ceph_inode(dir); | |
453 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
454 | int got = 0, want = CEPH_CAP_FILE_EXCL | CEPH_CAP_DIR_CREATE; | |
455 | u64 ino; | |
456 | ||
457 | spin_lock(&ci->i_ceph_lock); | |
458 | /* No auth cap means no chance for Dc caps */ | |
459 | if (!ci->i_auth_cap) | |
460 | goto no_async; | |
461 | ||
462 | /* Any delegated inos? */ | |
463 | if (xa_empty(&ci->i_auth_cap->session->s_delegated_inos)) | |
464 | goto no_async; | |
465 | ||
466 | if (!ceph_file_layout_is_valid(&ci->i_cached_layout)) | |
467 | goto no_async; | |
468 | ||
469 | if ((__ceph_caps_issued(ci, NULL) & want) != want) | |
470 | goto no_async; | |
471 | ||
472 | if (d_in_lookup(dentry)) { | |
473 | if (!__ceph_dir_is_complete(ci)) | |
474 | goto no_async; | |
3313f66a YZ |
475 | spin_lock(&dentry->d_lock); |
476 | di->lease_shared_gen = atomic_read(&ci->i_shared_gen); | |
477 | spin_unlock(&dentry->d_lock); | |
9a8d03ca JL |
478 | } else if (atomic_read(&ci->i_shared_gen) != |
479 | READ_ONCE(di->lease_shared_gen)) { | |
480 | goto no_async; | |
481 | } | |
482 | ||
483 | ino = ceph_get_deleg_ino(ci->i_auth_cap->session); | |
484 | if (!ino) | |
485 | goto no_async; | |
486 | ||
487 | *pino = ino; | |
488 | ceph_take_cap_refs(ci, want, false); | |
489 | memcpy(lo, &ci->i_cached_layout, sizeof(*lo)); | |
490 | rcu_assign_pointer(lo->pool_ns, | |
491 | ceph_try_get_string(ci->i_cached_layout.pool_ns)); | |
492 | got = want; | |
493 | no_async: | |
494 | spin_unlock(&ci->i_ceph_lock); | |
495 | return got; | |
496 | } | |
497 | ||
498 | static void restore_deleg_ino(struct inode *dir, u64 ino) | |
499 | { | |
500 | struct ceph_inode_info *ci = ceph_inode(dir); | |
501 | struct ceph_mds_session *s = NULL; | |
502 | ||
503 | spin_lock(&ci->i_ceph_lock); | |
504 | if (ci->i_auth_cap) | |
505 | s = ceph_get_mds_session(ci->i_auth_cap->session); | |
506 | spin_unlock(&ci->i_ceph_lock); | |
507 | if (s) { | |
508 | int err = ceph_restore_deleg_ino(s, ino); | |
509 | if (err) | |
510 | pr_warn("ceph: unable to restore delegated ino 0x%llx to session: %d\n", | |
511 | ino, err); | |
512 | ceph_put_mds_session(s); | |
513 | } | |
514 | } | |
515 | ||
516 | static void ceph_async_create_cb(struct ceph_mds_client *mdsc, | |
517 | struct ceph_mds_request *req) | |
518 | { | |
519 | int result = req->r_err ? req->r_err : | |
520 | le32_to_cpu(req->r_reply_info.head->result); | |
521 | ||
522 | if (result == -EJUKEBOX) | |
523 | goto out; | |
524 | ||
525 | mapping_set_error(req->r_parent->i_mapping, result); | |
526 | ||
527 | if (result) { | |
528 | struct dentry *dentry = req->r_dentry; | |
2a575f13 JL |
529 | int pathlen = 0; |
530 | u64 base = 0; | |
9a8d03ca JL |
531 | char *path = ceph_mdsc_build_path(req->r_dentry, &pathlen, |
532 | &base, 0); | |
533 | ||
534 | ceph_dir_clear_complete(req->r_parent); | |
535 | if (!d_unhashed(dentry)) | |
536 | d_drop(dentry); | |
537 | ||
538 | /* FIXME: start returning I/O errors on all accesses? */ | |
539 | pr_warn("ceph: async create failure path=(%llx)%s result=%d!\n", | |
540 | base, IS_ERR(path) ? "<<bad>>" : path, result); | |
541 | ceph_mdsc_free_path(path, pathlen); | |
542 | } | |
543 | ||
544 | if (req->r_target_inode) { | |
545 | struct ceph_inode_info *ci = ceph_inode(req->r_target_inode); | |
546 | u64 ino = ceph_vino(req->r_target_inode).ino; | |
547 | ||
548 | if (req->r_deleg_ino != ino) | |
549 | pr_warn("%s: inode number mismatch! err=%d deleg_ino=0x%llx target=0x%llx\n", | |
550 | __func__, req->r_err, req->r_deleg_ino, ino); | |
551 | mapping_set_error(req->r_target_inode->i_mapping, result); | |
552 | ||
553 | spin_lock(&ci->i_ceph_lock); | |
554 | if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE) { | |
555 | ci->i_ceph_flags &= ~CEPH_I_ASYNC_CREATE; | |
556 | wake_up_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT); | |
557 | } | |
558 | ceph_kick_flushing_inode_caps(req->r_session, ci); | |
559 | spin_unlock(&ci->i_ceph_lock); | |
560 | } else { | |
561 | pr_warn("%s: no req->r_target_inode for 0x%llx\n", __func__, | |
562 | req->r_deleg_ino); | |
563 | } | |
564 | out: | |
565 | ceph_mdsc_release_dir_caps(req); | |
566 | } | |
567 | ||
568 | static int ceph_finish_async_create(struct inode *dir, struct dentry *dentry, | |
569 | struct file *file, umode_t mode, | |
570 | struct ceph_mds_request *req, | |
571 | struct ceph_acl_sec_ctx *as_ctx, | |
572 | struct ceph_file_layout *lo) | |
573 | { | |
574 | int ret; | |
575 | char xattr_buf[4]; | |
576 | struct ceph_mds_reply_inode in = { }; | |
577 | struct ceph_mds_reply_info_in iinfo = { .in = &in }; | |
578 | struct ceph_inode_info *ci = ceph_inode(dir); | |
579 | struct inode *inode; | |
580 | struct timespec64 now; | |
27171ae6 | 581 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(dir->i_sb); |
9a8d03ca JL |
582 | struct ceph_vino vino = { .ino = req->r_deleg_ino, |
583 | .snap = CEPH_NOSNAP }; | |
584 | ||
585 | ktime_get_real_ts64(&now); | |
586 | ||
587 | inode = ceph_get_inode(dentry->d_sb, vino); | |
588 | if (IS_ERR(inode)) | |
589 | return PTR_ERR(inode); | |
590 | ||
591 | iinfo.inline_version = CEPH_INLINE_NONE; | |
592 | iinfo.change_attr = 1; | |
593 | ceph_encode_timespec64(&iinfo.btime, &now); | |
594 | ||
595 | iinfo.xattr_len = ARRAY_SIZE(xattr_buf); | |
596 | iinfo.xattr_data = xattr_buf; | |
597 | memset(iinfo.xattr_data, 0, iinfo.xattr_len); | |
598 | ||
599 | in.ino = cpu_to_le64(vino.ino); | |
600 | in.snapid = cpu_to_le64(CEPH_NOSNAP); | |
601 | in.version = cpu_to_le64(1); // ??? | |
602 | in.cap.caps = in.cap.wanted = cpu_to_le32(CEPH_CAP_ALL_FILE); | |
603 | in.cap.cap_id = cpu_to_le64(1); | |
604 | in.cap.realm = cpu_to_le64(ci->i_snap_realm->ino); | |
605 | in.cap.flags = CEPH_CAP_FLAG_AUTH; | |
606 | in.ctime = in.mtime = in.atime = iinfo.btime; | |
607 | in.mode = cpu_to_le32((u32)mode); | |
608 | in.truncate_seq = cpu_to_le32(1); | |
609 | in.truncate_size = cpu_to_le64(-1ULL); | |
610 | in.xattr_version = cpu_to_le64(1); | |
611 | in.uid = cpu_to_le32(from_kuid(&init_user_ns, current_fsuid())); | |
612 | in.gid = cpu_to_le32(from_kgid(&init_user_ns, dir->i_mode & S_ISGID ? | |
613 | dir->i_gid : current_fsgid())); | |
614 | in.nlink = cpu_to_le32(1); | |
615 | in.max_size = cpu_to_le64(lo->stripe_unit); | |
616 | ||
617 | ceph_file_layout_to_legacy(lo, &in.layout); | |
618 | ||
27171ae6 | 619 | down_read(&mdsc->snap_rwsem); |
9a8d03ca JL |
620 | ret = ceph_fill_inode(inode, NULL, &iinfo, NULL, req->r_session, |
621 | req->r_fmode, NULL); | |
27171ae6 | 622 | up_read(&mdsc->snap_rwsem); |
9a8d03ca JL |
623 | if (ret) { |
624 | dout("%s failed to fill inode: %d\n", __func__, ret); | |
625 | ceph_dir_clear_complete(dir); | |
626 | if (!d_unhashed(dentry)) | |
627 | d_drop(dentry); | |
628 | if (inode->i_state & I_NEW) | |
629 | discard_new_inode(inode); | |
630 | } else { | |
631 | struct dentry *dn; | |
632 | ||
ebce3eb2 JL |
633 | dout("%s d_adding new inode 0x%llx to 0x%llx/%s\n", __func__, |
634 | vino.ino, ceph_ino(dir), dentry->d_name.name); | |
9a8d03ca JL |
635 | ceph_dir_clear_ordered(dir); |
636 | ceph_init_inode_acls(inode, as_ctx); | |
637 | if (inode->i_state & I_NEW) { | |
638 | /* | |
639 | * If it's not I_NEW, then someone created this before | |
640 | * we got here. Assume the server is aware of it at | |
641 | * that point and don't worry about setting | |
642 | * CEPH_I_ASYNC_CREATE. | |
643 | */ | |
644 | ceph_inode(inode)->i_ceph_flags = CEPH_I_ASYNC_CREATE; | |
645 | unlock_new_inode(inode); | |
646 | } | |
647 | if (d_in_lookup(dentry) || d_really_is_negative(dentry)) { | |
648 | if (!d_unhashed(dentry)) | |
649 | d_drop(dentry); | |
650 | dn = d_splice_alias(inode, dentry); | |
651 | WARN_ON_ONCE(dn && dn != dentry); | |
652 | } | |
653 | file->f_mode |= FMODE_CREATED; | |
654 | ret = finish_open(file, dentry, ceph_open); | |
655 | } | |
656 | return ret; | |
657 | } | |
658 | ||
124e68e7 | 659 | /* |
5ef50c3b SW |
660 | * Do a lookup + open with a single request. If we get a non-existent |
661 | * file or symlink, return 1 so the VFS can retry. | |
124e68e7 | 662 | */ |
5ef50c3b | 663 | int ceph_atomic_open(struct inode *dir, struct dentry *dentry, |
44907d79 | 664 | struct file *file, unsigned flags, umode_t mode) |
124e68e7 | 665 | { |
3d14c5d2 YS |
666 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
667 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
124e68e7 | 668 | struct ceph_mds_request *req; |
5ef50c3b | 669 | struct dentry *dn; |
5c31e92d | 670 | struct ceph_acl_sec_ctx as_ctx = {}; |
9a8d03ca | 671 | bool try_async = ceph_test_mount_opt(fsc, ASYNC_DIROPS); |
b7a29217 | 672 | int mask; |
124e68e7 | 673 | int err; |
124e68e7 | 674 | |
a455589f AV |
675 | dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n", |
676 | dir, dentry, dentry, | |
5ef50c3b SW |
677 | d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode); |
678 | ||
679 | if (dentry->d_name.len > NAME_MAX) | |
680 | return -ENAMETOOLONG; | |
681 | ||
b1ee94aa | 682 | if (flags & O_CREAT) { |
b7a29217 LH |
683 | if (ceph_quota_is_max_files_exceeded(dir)) |
684 | return -EDQUOT; | |
5c31e92d | 685 | err = ceph_pre_init_acls(dir, &mode, &as_ctx); |
b1ee94aa YZ |
686 | if (err < 0) |
687 | return err; | |
ac6713cc YZ |
688 | err = ceph_security_init_secctx(dentry, mode, &as_ctx); |
689 | if (err < 0) | |
690 | goto out_ctx; | |
5bb5e6ee JL |
691 | } else if (!d_in_lookup(dentry)) { |
692 | /* If it's not being looked up, it's negative */ | |
693 | return -ENOENT; | |
b1ee94aa | 694 | } |
9a8d03ca | 695 | retry: |
124e68e7 SW |
696 | /* do the open */ |
697 | req = prepare_open_request(dir->i_sb, flags, mode); | |
b1ee94aa YZ |
698 | if (IS_ERR(req)) { |
699 | err = PTR_ERR(req); | |
5c31e92d | 700 | goto out_ctx; |
b1ee94aa | 701 | } |
124e68e7 SW |
702 | req->r_dentry = dget(dentry); |
703 | req->r_num_caps = 2; | |
9a8d03ca JL |
704 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; |
705 | if (ceph_security_xattr_wanted(dir)) | |
706 | mask |= CEPH_CAP_XATTR_SHARED; | |
707 | req->r_args.open.mask = cpu_to_le32(mask); | |
708 | req->r_parent = dir; | |
4c183472 | 709 | ihold(dir); |
9a8d03ca | 710 | |
124e68e7 | 711 | if (flags & O_CREAT) { |
9a8d03ca JL |
712 | struct ceph_file_layout lo; |
713 | ||
222b7f90 | 714 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL; |
124e68e7 | 715 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |
5c31e92d YZ |
716 | if (as_ctx.pagelist) { |
717 | req->r_pagelist = as_ctx.pagelist; | |
718 | as_ctx.pagelist = NULL; | |
b1ee94aa | 719 | } |
9a8d03ca JL |
720 | if (try_async && |
721 | (req->r_dir_caps = | |
722 | try_prep_async_create(dir, dentry, &lo, | |
723 | &req->r_deleg_ino))) { | |
724 | set_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags); | |
725 | req->r_args.open.flags |= cpu_to_le32(CEPH_O_EXCL); | |
726 | req->r_callback = ceph_async_create_cb; | |
727 | err = ceph_mdsc_submit_request(mdsc, dir, req); | |
728 | if (!err) { | |
729 | err = ceph_finish_async_create(dir, dentry, | |
730 | file, mode, req, | |
731 | &as_ctx, &lo); | |
732 | } else if (err == -EJUKEBOX) { | |
733 | restore_deleg_ino(dir, req->r_deleg_ino); | |
734 | ceph_mdsc_put_request(req); | |
735 | try_async = false; | |
736 | goto retry; | |
737 | } | |
738 | goto out_req; | |
739 | } | |
124e68e7 | 740 | } |
315f2408 | 741 | |
3dd69aab | 742 | set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); |
acda7657 SW |
743 | err = ceph_mdsc_do_request(mdsc, |
744 | (flags & (O_CREAT|O_TRUNC)) ? dir : NULL, | |
745 | req); | |
7a971e2c JL |
746 | if (err == -ENOENT) { |
747 | dentry = ceph_handle_snapdir(req, dentry); | |
748 | if (IS_ERR(dentry)) { | |
749 | err = PTR_ERR(dentry); | |
750 | goto out_req; | |
751 | } | |
752 | err = 0; | |
aa60cfc3 | 753 | } |
79aec984 | 754 | |
7a971e2c | 755 | if (!err && (flags & O_CREAT) && !req->r_reply_info.head->is_dentry) |
124e68e7 | 756 | err = ceph_handle_notrace_create(dir, dentry); |
2d83bde9 | 757 | |
00699ad8 | 758 | if (d_in_lookup(dentry)) { |
5ef50c3b SW |
759 | dn = ceph_finish_lookup(req, dentry, err); |
760 | if (IS_ERR(dn)) | |
761 | err = PTR_ERR(dn); | |
762 | } else { | |
763 | /* we were given a hashed negative dentry */ | |
764 | dn = NULL; | |
765 | } | |
766 | if (err) | |
b1ee94aa | 767 | goto out_req; |
2b0143b5 | 768 | if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) { |
5ef50c3b SW |
769 | /* make vfs retry on splice, ENOENT, or symlink */ |
770 | dout("atomic_open finish_no_open on dn %p\n", dn); | |
771 | err = finish_no_open(file, dn); | |
772 | } else { | |
773 | dout("atomic_open finish_open on dn %p\n", dn); | |
6e8575fa | 774 | if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) { |
785892fe JL |
775 | struct inode *newino = d_inode(dentry); |
776 | ||
777 | cache_file_layout(dir, newino); | |
778 | ceph_init_inode_acls(newino, &as_ctx); | |
73a09dd9 | 779 | file->f_mode |= FMODE_CREATED; |
6e8575fa | 780 | } |
be12af3e | 781 | err = finish_open(file, dentry, ceph_open); |
5ef50c3b | 782 | } |
b1ee94aa | 783 | out_req: |
5ef50c3b | 784 | ceph_mdsc_put_request(req); |
5c31e92d YZ |
785 | out_ctx: |
786 | ceph_release_acl_sec_ctx(&as_ctx); | |
5ef50c3b | 787 | dout("atomic_open result=%d\n", err); |
d9585277 | 788 | return err; |
124e68e7 SW |
789 | } |
790 | ||
791 | int ceph_release(struct inode *inode, struct file *file) | |
792 | { | |
793 | struct ceph_inode_info *ci = ceph_inode(inode); | |
124e68e7 | 794 | |
bb48bd4d CX |
795 | if (S_ISDIR(inode->i_mode)) { |
796 | struct ceph_dir_file_info *dfi = file->private_data; | |
797 | dout("release inode %p dir file %p\n", inode, file); | |
798 | WARN_ON(!list_empty(&dfi->file_info.rw_contexts)); | |
799 | ||
719a2514 | 800 | ceph_put_fmode(ci, dfi->file_info.fmode, 1); |
bb48bd4d CX |
801 | |
802 | if (dfi->last_readdir) | |
803 | ceph_mdsc_put_request(dfi->last_readdir); | |
804 | kfree(dfi->last_name); | |
805 | kfree(dfi->dir_info); | |
806 | kmem_cache_free(ceph_dir_file_cachep, dfi); | |
807 | } else { | |
808 | struct ceph_file_info *fi = file->private_data; | |
809 | dout("release inode %p regular file %p\n", inode, file); | |
810 | WARN_ON(!list_empty(&fi->rw_contexts)); | |
811 | ||
719a2514 YZ |
812 | ceph_put_fmode(ci, fi->fmode, 1); |
813 | ||
bb48bd4d CX |
814 | kmem_cache_free(ceph_file_cachep, fi); |
815 | } | |
195d3ce2 SW |
816 | |
817 | /* wake up anyone waiting for caps on this inode */ | |
03066f23 | 818 | wake_up_all(&ci->i_cap_wq); |
124e68e7 SW |
819 | return 0; |
820 | } | |
821 | ||
83701246 | 822 | enum { |
c8fe9b17 YZ |
823 | HAVE_RETRIED = 1, |
824 | CHECK_EOF = 2, | |
825 | READ_INLINE = 3, | |
83701246 YZ |
826 | }; |
827 | ||
124e68e7 SW |
828 | /* |
829 | * Completely synchronous read and write methods. Direct from __user | |
830 | * buffer to osd, or directly to user pages (if O_DIRECT). | |
831 | * | |
fce7a974 YZ |
832 | * If the read spans object boundary, just do multiple reads. (That's not |
833 | * atomic, but good enough for now.) | |
834 | * | |
835 | * If we get a short result from the OSD, check against i_size; we need to | |
836 | * only return a short read to the caller if we hit EOF. | |
124e68e7 | 837 | */ |
7ce469a5 | 838 | static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to, |
fce7a974 | 839 | int *retry_op) |
124e68e7 | 840 | { |
8eb4efb0 | 841 | struct file *file = iocb->ki_filp; |
496ad9aa | 842 | struct inode *inode = file_inode(file); |
fce7a974 YZ |
843 | struct ceph_inode_info *ci = ceph_inode(inode); |
844 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
845 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
7ce469a5 | 846 | ssize_t ret; |
fce7a974 YZ |
847 | u64 off = iocb->ki_pos; |
848 | u64 len = iov_iter_count(to); | |
124e68e7 | 849 | |
1c0a9c2d | 850 | dout("sync_read on file %p %llu~%u %s\n", file, off, (unsigned)len, |
124e68e7 | 851 | (file->f_flags & O_DIRECT) ? "O_DIRECT" : ""); |
d0d0db22 YZ |
852 | |
853 | if (!len) | |
854 | return 0; | |
e98b6fed SW |
855 | /* |
856 | * flush any page cache pages in this range. this | |
857 | * will make concurrent normal and sync io slow, | |
858 | * but it will at least behave sensibly when they are | |
859 | * in sequence. | |
860 | */ | |
e450f4d1 | 861 | ret = filemap_write_and_wait_range(inode->i_mapping, |
862 | off, off + len - 1); | |
29065a51 | 863 | if (ret < 0) |
8eb4efb0 | 864 | return ret; |
29065a51 | 865 | |
fce7a974 YZ |
866 | ret = 0; |
867 | while ((len = iov_iter_count(to)) > 0) { | |
868 | struct ceph_osd_request *req; | |
869 | struct page **pages; | |
870 | int num_pages; | |
7ce469a5 | 871 | size_t page_off; |
fce7a974 YZ |
872 | u64 i_size; |
873 | bool more; | |
c5f575ed JL |
874 | int idx; |
875 | size_t left; | |
fce7a974 YZ |
876 | |
877 | req = ceph_osdc_new_request(osdc, &ci->i_layout, | |
878 | ci->i_vino, off, &len, 0, 1, | |
879 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
880 | NULL, ci->i_truncate_seq, | |
881 | ci->i_truncate_size, false); | |
882 | if (IS_ERR(req)) { | |
883 | ret = PTR_ERR(req); | |
884 | break; | |
885 | } | |
7ce469a5 | 886 | |
fce7a974 YZ |
887 | more = len < iov_iter_count(to); |
888 | ||
c5f575ed JL |
889 | num_pages = calc_pages_for(off, len); |
890 | page_off = off & ~PAGE_MASK; | |
891 | pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); | |
892 | if (IS_ERR(pages)) { | |
893 | ceph_osdc_put_request(req); | |
894 | ret = PTR_ERR(pages); | |
895 | break; | |
7ce469a5 | 896 | } |
fce7a974 YZ |
897 | |
898 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_off, | |
899 | false, false); | |
900 | ret = ceph_osdc_start_request(osdc, req, false); | |
901 | if (!ret) | |
902 | ret = ceph_osdc_wait_request(osdc, req); | |
97e27aaa | 903 | |
8ae99ae2 | 904 | ceph_update_read_metrics(&fsc->mdsc->metric, |
97e27aaa XL |
905 | req->r_start_latency, |
906 | req->r_end_latency, | |
903f4fec | 907 | len, ret); |
97e27aaa | 908 | |
fce7a974 YZ |
909 | ceph_osdc_put_request(req); |
910 | ||
911 | i_size = i_size_read(inode); | |
912 | dout("sync_read %llu~%llu got %zd i_size %llu%s\n", | |
913 | off, len, ret, i_size, (more ? " MORE" : "")); | |
914 | ||
915 | if (ret == -ENOENT) | |
916 | ret = 0; | |
917 | if (ret >= 0 && ret < len && (off + ret < i_size)) { | |
918 | int zlen = min(len - ret, i_size - off - ret); | |
919 | int zoff = page_off + ret; | |
920 | dout("sync_read zero gap %llu~%llu\n", | |
921 | off + ret, off + ret + zlen); | |
922 | ceph_zero_page_vector_range(zoff, zlen, pages); | |
923 | ret += zlen; | |
924 | } | |
925 | ||
c5f575ed JL |
926 | idx = 0; |
927 | left = ret > 0 ? ret : 0; | |
928 | while (left > 0) { | |
929 | size_t len, copied; | |
930 | page_off = off & ~PAGE_MASK; | |
931 | len = min_t(size_t, left, PAGE_SIZE - page_off); | |
932 | SetPageUptodate(pages[idx]); | |
933 | copied = copy_page_to_iter(pages[idx++], | |
934 | page_off, len, to); | |
935 | off += copied; | |
936 | left -= copied; | |
937 | if (copied < len) { | |
938 | ret = -EFAULT; | |
939 | break; | |
7ce469a5 | 940 | } |
8eb4efb0 | 941 | } |
c5f575ed | 942 | ceph_release_page_vector(pages, num_pages); |
fce7a974 | 943 | |
131d7eb4 | 944 | if (ret < 0) { |
0b98acd6 ID |
945 | if (ret == -EBLOCKLISTED) |
946 | fsc->blocklisted = true; | |
131d7eb4 YZ |
947 | break; |
948 | } | |
949 | ||
950 | if (off >= i_size || !more) | |
fce7a974 | 951 | break; |
8eb4efb0 | 952 | } |
124e68e7 | 953 | |
8eb4efb0 | 954 | if (off > iocb->ki_pos) { |
fce7a974 YZ |
955 | if (ret >= 0 && |
956 | iov_iter_count(to) > 0 && off >= i_size_read(inode)) | |
957 | *retry_op = CHECK_EOF; | |
8eb4efb0 | 958 | ret = off - iocb->ki_pos; |
959 | iocb->ki_pos = off; | |
960 | } | |
124e68e7 | 961 | |
fce7a974 | 962 | dout("sync_read result %zd retry_op %d\n", ret, *retry_op); |
124e68e7 SW |
963 | return ret; |
964 | } | |
965 | ||
c8fe9b17 YZ |
966 | struct ceph_aio_request { |
967 | struct kiocb *iocb; | |
968 | size_t total_len; | |
85784f93 YZ |
969 | bool write; |
970 | bool should_dirty; | |
c8fe9b17 YZ |
971 | int error; |
972 | struct list_head osd_reqs; | |
973 | unsigned num_reqs; | |
974 | atomic_t pending_reqs; | |
fac02ddf | 975 | struct timespec64 mtime; |
c8fe9b17 YZ |
976 | struct ceph_cap_flush *prealloc_cf; |
977 | }; | |
978 | ||
5be0389d YZ |
979 | struct ceph_aio_work { |
980 | struct work_struct work; | |
981 | struct ceph_osd_request *req; | |
982 | }; | |
983 | ||
984 | static void ceph_aio_retry_work(struct work_struct *work); | |
985 | ||
c8fe9b17 YZ |
986 | static void ceph_aio_complete(struct inode *inode, |
987 | struct ceph_aio_request *aio_req) | |
988 | { | |
989 | struct ceph_inode_info *ci = ceph_inode(inode); | |
990 | int ret; | |
991 | ||
992 | if (!atomic_dec_and_test(&aio_req->pending_reqs)) | |
993 | return; | |
994 | ||
6a81749e JL |
995 | if (aio_req->iocb->ki_flags & IOCB_DIRECT) |
996 | inode_dio_end(inode); | |
997 | ||
c8fe9b17 YZ |
998 | ret = aio_req->error; |
999 | if (!ret) | |
1000 | ret = aio_req->total_len; | |
1001 | ||
1002 | dout("ceph_aio_complete %p rc %d\n", inode, ret); | |
1003 | ||
1004 | if (ret >= 0 && aio_req->write) { | |
1005 | int dirty; | |
1006 | ||
1007 | loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len; | |
1008 | if (endoff > i_size_read(inode)) { | |
1009 | if (ceph_inode_set_size(inode, endoff)) | |
1010 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
1011 | } | |
1012 | ||
1013 | spin_lock(&ci->i_ceph_lock); | |
1014 | ci->i_inline_version = CEPH_INLINE_NONE; | |
1015 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, | |
1016 | &aio_req->prealloc_cf); | |
1017 | spin_unlock(&ci->i_ceph_lock); | |
1018 | if (dirty) | |
1019 | __mark_inode_dirty(inode, dirty); | |
1020 | ||
1021 | } | |
1022 | ||
1023 | ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR : | |
1024 | CEPH_CAP_FILE_RD)); | |
1025 | ||
1026 | aio_req->iocb->ki_complete(aio_req->iocb, ret, 0); | |
1027 | ||
1028 | ceph_free_cap_flush(aio_req->prealloc_cf); | |
1029 | kfree(aio_req); | |
1030 | } | |
1031 | ||
85e084fe | 1032 | static void ceph_aio_complete_req(struct ceph_osd_request *req) |
c8fe9b17 YZ |
1033 | { |
1034 | int rc = req->r_result; | |
1035 | struct inode *inode = req->r_inode; | |
1036 | struct ceph_aio_request *aio_req = req->r_priv; | |
1037 | struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0); | |
2678da88 | 1038 | struct ceph_client_metric *metric = &ceph_sb_to_mdsc(inode->i_sb)->metric; |
903f4fec | 1039 | unsigned int len = osd_data->bvec_pos.iter.bi_size; |
c8fe9b17 | 1040 | |
fc218544 ID |
1041 | BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_BVECS); |
1042 | BUG_ON(!osd_data->num_bvecs); | |
1043 | ||
903f4fec | 1044 | dout("ceph_aio_complete_req %p rc %d bytes %u\n", inode, rc, len); |
c8fe9b17 YZ |
1045 | |
1046 | if (rc == -EOLDSNAPC) { | |
5be0389d YZ |
1047 | struct ceph_aio_work *aio_work; |
1048 | BUG_ON(!aio_req->write); | |
1049 | ||
1050 | aio_work = kmalloc(sizeof(*aio_work), GFP_NOFS); | |
1051 | if (aio_work) { | |
1052 | INIT_WORK(&aio_work->work, ceph_aio_retry_work); | |
1053 | aio_work->req = req; | |
1cf89a8d | 1054 | queue_work(ceph_inode_to_client(inode)->inode_wq, |
5be0389d YZ |
1055 | &aio_work->work); |
1056 | return; | |
1057 | } | |
1058 | rc = -ENOMEM; | |
1059 | } else if (!aio_req->write) { | |
c8fe9b17 YZ |
1060 | if (rc == -ENOENT) |
1061 | rc = 0; | |
903f4fec | 1062 | if (rc >= 0 && len > rc) { |
fc218544 | 1063 | struct iov_iter i; |
903f4fec | 1064 | int zlen = len - rc; |
fc218544 | 1065 | |
c8fe9b17 YZ |
1066 | /* |
1067 | * If read is satisfied by single OSD request, | |
1068 | * it can pass EOF. Otherwise read is within | |
1069 | * i_size. | |
1070 | */ | |
1071 | if (aio_req->num_reqs == 1) { | |
1072 | loff_t i_size = i_size_read(inode); | |
1073 | loff_t endoff = aio_req->iocb->ki_pos + rc; | |
1074 | if (endoff < i_size) | |
1075 | zlen = min_t(size_t, zlen, | |
1076 | i_size - endoff); | |
1077 | aio_req->total_len = rc + zlen; | |
1078 | } | |
1079 | ||
aa563d7b | 1080 | iov_iter_bvec(&i, READ, osd_data->bvec_pos.bvecs, |
903f4fec | 1081 | osd_data->num_bvecs, len); |
fc218544 ID |
1082 | iov_iter_advance(&i, rc); |
1083 | iov_iter_zero(zlen, &i); | |
c8fe9b17 YZ |
1084 | } |
1085 | } | |
1086 | ||
fbd47ddc XL |
1087 | /* r_start_latency == 0 means the request was not submitted */ |
1088 | if (req->r_start_latency) { | |
1089 | if (aio_req->write) | |
1090 | ceph_update_write_metrics(metric, req->r_start_latency, | |
903f4fec | 1091 | req->r_end_latency, len, rc); |
fbd47ddc XL |
1092 | else |
1093 | ceph_update_read_metrics(metric, req->r_start_latency, | |
903f4fec | 1094 | req->r_end_latency, len, rc); |
fbd47ddc XL |
1095 | } |
1096 | ||
fc218544 ID |
1097 | put_bvecs(osd_data->bvec_pos.bvecs, osd_data->num_bvecs, |
1098 | aio_req->should_dirty); | |
c8fe9b17 YZ |
1099 | ceph_osdc_put_request(req); |
1100 | ||
1101 | if (rc < 0) | |
1102 | cmpxchg(&aio_req->error, 0, rc); | |
1103 | ||
1104 | ceph_aio_complete(inode, aio_req); | |
1105 | return; | |
1106 | } | |
1107 | ||
5be0389d YZ |
1108 | static void ceph_aio_retry_work(struct work_struct *work) |
1109 | { | |
1110 | struct ceph_aio_work *aio_work = | |
1111 | container_of(work, struct ceph_aio_work, work); | |
1112 | struct ceph_osd_request *orig_req = aio_work->req; | |
1113 | struct ceph_aio_request *aio_req = orig_req->r_priv; | |
1114 | struct inode *inode = orig_req->r_inode; | |
1115 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1116 | struct ceph_snap_context *snapc; | |
1117 | struct ceph_osd_request *req; | |
1118 | int ret; | |
1119 | ||
1120 | spin_lock(&ci->i_ceph_lock); | |
1121 | if (__ceph_have_pending_cap_snap(ci)) { | |
1122 | struct ceph_cap_snap *capsnap = | |
1123 | list_last_entry(&ci->i_cap_snaps, | |
1124 | struct ceph_cap_snap, | |
1125 | ci_item); | |
1126 | snapc = ceph_get_snap_context(capsnap->context); | |
1127 | } else { | |
1128 | BUG_ON(!ci->i_head_snapc); | |
1129 | snapc = ceph_get_snap_context(ci->i_head_snapc); | |
1130 | } | |
1131 | spin_unlock(&ci->i_ceph_lock); | |
1132 | ||
61d2f855 | 1133 | req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 1, |
5be0389d | 1134 | false, GFP_NOFS); |
1418bf07 DC |
1135 | if (!req) { |
1136 | ret = -ENOMEM; | |
5be0389d YZ |
1137 | req = orig_req; |
1138 | goto out; | |
1139 | } | |
1140 | ||
b178cf43 | 1141 | req->r_flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
63244fa1 | 1142 | ceph_oloc_copy(&req->r_base_oloc, &orig_req->r_base_oloc); |
d30291b9 | 1143 | ceph_oid_copy(&req->r_base_oid, &orig_req->r_base_oid); |
5be0389d | 1144 | |
26f887e0 ID |
1145 | req->r_ops[0] = orig_req->r_ops[0]; |
1146 | ||
1147 | req->r_mtime = aio_req->mtime; | |
1148 | req->r_data_offset = req->r_ops[0].extent.offset; | |
1149 | ||
13d1ad16 ID |
1150 | ret = ceph_osdc_alloc_messages(req, GFP_NOFS); |
1151 | if (ret) { | |
1152 | ceph_osdc_put_request(req); | |
1153 | req = orig_req; | |
1154 | goto out; | |
1155 | } | |
5be0389d | 1156 | |
5be0389d YZ |
1157 | ceph_osdc_put_request(orig_req); |
1158 | ||
1159 | req->r_callback = ceph_aio_complete_req; | |
1160 | req->r_inode = inode; | |
1161 | req->r_priv = aio_req; | |
1162 | ||
1163 | ret = ceph_osdc_start_request(req->r_osdc, req, false); | |
1164 | out: | |
1165 | if (ret < 0) { | |
5be0389d | 1166 | req->r_result = ret; |
85e084fe | 1167 | ceph_aio_complete_req(req); |
5be0389d YZ |
1168 | } |
1169 | ||
db6aed70 | 1170 | ceph_put_snap_context(snapc); |
5be0389d YZ |
1171 | kfree(aio_work); |
1172 | } | |
1173 | ||
e8344e66 | 1174 | static ssize_t |
c8fe9b17 YZ |
1175 | ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter, |
1176 | struct ceph_snap_context *snapc, | |
1177 | struct ceph_cap_flush **pcf) | |
124e68e7 | 1178 | { |
e8344e66 | 1179 | struct file *file = iocb->ki_filp; |
496ad9aa | 1180 | struct inode *inode = file_inode(file); |
124e68e7 | 1181 | struct ceph_inode_info *ci = ceph_inode(inode); |
3d14c5d2 | 1182 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
97e27aaa | 1183 | struct ceph_client_metric *metric = &fsc->mdsc->metric; |
acead002 | 1184 | struct ceph_vino vino; |
124e68e7 | 1185 | struct ceph_osd_request *req; |
fc218544 | 1186 | struct bio_vec *bvecs; |
c8fe9b17 YZ |
1187 | struct ceph_aio_request *aio_req = NULL; |
1188 | int num_pages = 0; | |
124e68e7 | 1189 | int flags; |
321fe13c | 1190 | int ret = 0; |
fac02ddf | 1191 | struct timespec64 mtime = current_time(inode); |
c8fe9b17 YZ |
1192 | size_t count = iov_iter_count(iter); |
1193 | loff_t pos = iocb->ki_pos; | |
1194 | bool write = iov_iter_rw(iter) == WRITE; | |
85784f93 | 1195 | bool should_dirty = !write && iter_is_iovec(iter); |
124e68e7 | 1196 | |
c8fe9b17 | 1197 | if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP) |
124e68e7 SW |
1198 | return -EROFS; |
1199 | ||
1c0a9c2d YZ |
1200 | dout("sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n", |
1201 | (write ? "write" : "read"), file, pos, (unsigned)count, | |
40e7e2c0 | 1202 | snapc, snapc ? snapc->seq : 0); |
124e68e7 | 1203 | |
c8fe9b17 | 1204 | if (write) { |
5d7eb1a3 | 1205 | int ret2 = invalidate_inode_pages2_range(inode->i_mapping, |
09cbfeaf | 1206 | pos >> PAGE_SHIFT, |
e450f4d1 | 1207 | (pos + count - 1) >> PAGE_SHIFT); |
5d7eb1a3 | 1208 | if (ret2 < 0) |
a380a031 | 1209 | dout("invalidate_inode_pages2_range returned %d\n", ret2); |
29065a51 | 1210 | |
b178cf43 | 1211 | flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
c8fe9b17 YZ |
1212 | } else { |
1213 | flags = CEPH_OSD_FLAG_READ; | |
1214 | } | |
124e68e7 | 1215 | |
c8fe9b17 | 1216 | while (iov_iter_count(iter) > 0) { |
fc218544 | 1217 | u64 size = iov_iter_count(iter); |
c8fe9b17 | 1218 | ssize_t len; |
e8344e66 | 1219 | |
3a15b38f ID |
1220 | if (write) |
1221 | size = min_t(u64, size, fsc->mount_options->wsize); | |
1222 | else | |
1223 | size = min_t(u64, size, fsc->mount_options->rsize); | |
1224 | ||
e8344e66 | 1225 | vino = ceph_vino(inode); |
1226 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
c8fe9b17 | 1227 | vino, pos, &size, 0, |
3fb99d48 | 1228 | 1, |
c8fe9b17 YZ |
1229 | write ? CEPH_OSD_OP_WRITE : |
1230 | CEPH_OSD_OP_READ, | |
1231 | flags, snapc, | |
e8344e66 | 1232 | ci->i_truncate_seq, |
1233 | ci->i_truncate_size, | |
1234 | false); | |
1235 | if (IS_ERR(req)) { | |
1236 | ret = PTR_ERR(req); | |
eab87235 | 1237 | break; |
e8344e66 | 1238 | } |
124e68e7 | 1239 | |
fc218544 ID |
1240 | len = iter_get_bvecs_alloc(iter, size, &bvecs, &num_pages); |
1241 | if (len < 0) { | |
64c31311 | 1242 | ceph_osdc_put_request(req); |
fc218544 | 1243 | ret = len; |
64c31311 | 1244 | break; |
124e68e7 | 1245 | } |
fc218544 ID |
1246 | if (len != size) |
1247 | osd_req_op_extent_update(req, 0, len); | |
124e68e7 SW |
1248 | |
1249 | /* | |
c8fe9b17 YZ |
1250 | * To simplify error handling, allow AIO when IO within i_size |
1251 | * or IO can be satisfied by single OSD request. | |
124e68e7 | 1252 | */ |
c8fe9b17 YZ |
1253 | if (pos == iocb->ki_pos && !is_sync_kiocb(iocb) && |
1254 | (len == count || pos + count <= i_size_read(inode))) { | |
1255 | aio_req = kzalloc(sizeof(*aio_req), GFP_KERNEL); | |
1256 | if (aio_req) { | |
1257 | aio_req->iocb = iocb; | |
1258 | aio_req->write = write; | |
85784f93 | 1259 | aio_req->should_dirty = should_dirty; |
c8fe9b17 YZ |
1260 | INIT_LIST_HEAD(&aio_req->osd_reqs); |
1261 | if (write) { | |
5be0389d | 1262 | aio_req->mtime = mtime; |
c8fe9b17 YZ |
1263 | swap(aio_req->prealloc_cf, *pcf); |
1264 | } | |
1265 | } | |
1266 | /* ignore error */ | |
1267 | } | |
1268 | ||
1269 | if (write) { | |
1270 | /* | |
1271 | * throw out any page cache pages in this range. this | |
1272 | * may block. | |
1273 | */ | |
1274 | truncate_inode_pages_range(inode->i_mapping, pos, | |
d31d07b9 | 1275 | PAGE_ALIGN(pos + len) - 1); |
c8fe9b17 | 1276 | |
bb873b53 | 1277 | req->r_mtime = mtime; |
c8fe9b17 YZ |
1278 | } |
1279 | ||
fc218544 | 1280 | osd_req_op_extent_osd_data_bvecs(req, 0, bvecs, num_pages, len); |
e8344e66 | 1281 | |
c8fe9b17 YZ |
1282 | if (aio_req) { |
1283 | aio_req->total_len += len; | |
1284 | aio_req->num_reqs++; | |
1285 | atomic_inc(&aio_req->pending_reqs); | |
1286 | ||
1287 | req->r_callback = ceph_aio_complete_req; | |
1288 | req->r_inode = inode; | |
1289 | req->r_priv = aio_req; | |
94e85771 | 1290 | list_add_tail(&req->r_private_item, &aio_req->osd_reqs); |
c8fe9b17 YZ |
1291 | |
1292 | pos += len; | |
c8fe9b17 YZ |
1293 | continue; |
1294 | } | |
1295 | ||
1296 | ret = ceph_osdc_start_request(req->r_osdc, req, false); | |
e8344e66 | 1297 | if (!ret) |
1298 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
1299 | ||
97e27aaa | 1300 | if (write) |
8ae99ae2 | 1301 | ceph_update_write_metrics(metric, req->r_start_latency, |
903f4fec | 1302 | req->r_end_latency, len, ret); |
97e27aaa | 1303 | else |
8ae99ae2 | 1304 | ceph_update_read_metrics(metric, req->r_start_latency, |
903f4fec | 1305 | req->r_end_latency, len, ret); |
97e27aaa | 1306 | |
c8fe9b17 YZ |
1307 | size = i_size_read(inode); |
1308 | if (!write) { | |
1309 | if (ret == -ENOENT) | |
1310 | ret = 0; | |
1311 | if (ret >= 0 && ret < len && pos + ret < size) { | |
fc218544 | 1312 | struct iov_iter i; |
c8fe9b17 YZ |
1313 | int zlen = min_t(size_t, len - ret, |
1314 | size - pos - ret); | |
fc218544 | 1315 | |
aa563d7b | 1316 | iov_iter_bvec(&i, READ, bvecs, num_pages, len); |
fc218544 ID |
1317 | iov_iter_advance(&i, ret); |
1318 | iov_iter_zero(zlen, &i); | |
c8fe9b17 YZ |
1319 | ret += zlen; |
1320 | } | |
1321 | if (ret >= 0) | |
1322 | len = ret; | |
1323 | } | |
1324 | ||
fc218544 | 1325 | put_bvecs(bvecs, num_pages, should_dirty); |
e8344e66 | 1326 | ceph_osdc_put_request(req); |
c8fe9b17 | 1327 | if (ret < 0) |
e8344e66 | 1328 | break; |
64c31311 | 1329 | |
c8fe9b17 | 1330 | pos += len; |
c8fe9b17 | 1331 | if (!write && pos >= size) |
e8344e66 | 1332 | break; |
64c31311 | 1333 | |
c8fe9b17 YZ |
1334 | if (write && pos > size) { |
1335 | if (ceph_inode_set_size(inode, pos)) | |
64c31311 AV |
1336 | ceph_check_caps(ceph_inode(inode), |
1337 | CHECK_CAPS_AUTHONLY, | |
1338 | NULL); | |
1339 | } | |
e8344e66 | 1340 | } |
1341 | ||
c8fe9b17 | 1342 | if (aio_req) { |
fc8c3892 YZ |
1343 | LIST_HEAD(osd_reqs); |
1344 | ||
c8fe9b17 YZ |
1345 | if (aio_req->num_reqs == 0) { |
1346 | kfree(aio_req); | |
1347 | return ret; | |
1348 | } | |
1349 | ||
1350 | ceph_get_cap_refs(ci, write ? CEPH_CAP_FILE_WR : | |
1351 | CEPH_CAP_FILE_RD); | |
1352 | ||
fc8c3892 | 1353 | list_splice(&aio_req->osd_reqs, &osd_reqs); |
6a81749e | 1354 | inode_dio_begin(inode); |
fc8c3892 YZ |
1355 | while (!list_empty(&osd_reqs)) { |
1356 | req = list_first_entry(&osd_reqs, | |
c8fe9b17 | 1357 | struct ceph_osd_request, |
94e85771 ID |
1358 | r_private_item); |
1359 | list_del_init(&req->r_private_item); | |
c8fe9b17 YZ |
1360 | if (ret >= 0) |
1361 | ret = ceph_osdc_start_request(req->r_osdc, | |
1362 | req, false); | |
1363 | if (ret < 0) { | |
1364 | req->r_result = ret; | |
85e084fe | 1365 | ceph_aio_complete_req(req); |
c8fe9b17 YZ |
1366 | } |
1367 | } | |
1368 | return -EIOCBQUEUED; | |
1369 | } | |
1370 | ||
1371 | if (ret != -EOLDSNAPC && pos > iocb->ki_pos) { | |
1372 | ret = pos - iocb->ki_pos; | |
e8344e66 | 1373 | iocb->ki_pos = pos; |
e8344e66 | 1374 | } |
1375 | return ret; | |
1376 | } | |
1377 | ||
e8344e66 | 1378 | /* |
1379 | * Synchronous write, straight from __user pointer or user pages. | |
1380 | * | |
1381 | * If write spans object boundary, just do multiple writes. (For a | |
1382 | * correct atomic write, we should e.g. take write locks on all | |
1383 | * objects, rollback on failure, etc.) | |
1384 | */ | |
06fee30f | 1385 | static ssize_t |
5dda377c YZ |
1386 | ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos, |
1387 | struct ceph_snap_context *snapc) | |
e8344e66 | 1388 | { |
1389 | struct file *file = iocb->ki_filp; | |
1390 | struct inode *inode = file_inode(file); | |
1391 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1392 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
e8344e66 | 1393 | struct ceph_vino vino; |
1394 | struct ceph_osd_request *req; | |
1395 | struct page **pages; | |
1396 | u64 len; | |
1397 | int num_pages; | |
1398 | int written = 0; | |
1399 | int flags; | |
e8344e66 | 1400 | int ret; |
efb0ca76 | 1401 | bool check_caps = false; |
fac02ddf | 1402 | struct timespec64 mtime = current_time(inode); |
4908b822 | 1403 | size_t count = iov_iter_count(from); |
e8344e66 | 1404 | |
1405 | if (ceph_snap(file_inode(file)) != CEPH_NOSNAP) | |
1406 | return -EROFS; | |
1407 | ||
1c0a9c2d YZ |
1408 | dout("sync_write on file %p %lld~%u snapc %p seq %lld\n", |
1409 | file, pos, (unsigned)count, snapc, snapc->seq); | |
e8344e66 | 1410 | |
e450f4d1 | 1411 | ret = filemap_write_and_wait_range(inode->i_mapping, |
1412 | pos, pos + count - 1); | |
e8344e66 | 1413 | if (ret < 0) |
1414 | return ret; | |
1415 | ||
1416 | ret = invalidate_inode_pages2_range(inode->i_mapping, | |
09cbfeaf | 1417 | pos >> PAGE_SHIFT, |
e450f4d1 | 1418 | (pos + count - 1) >> PAGE_SHIFT); |
e8344e66 | 1419 | if (ret < 0) |
1420 | dout("invalidate_inode_pages2_range returned %d\n", ret); | |
1421 | ||
b178cf43 | 1422 | flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
e8344e66 | 1423 | |
4908b822 | 1424 | while ((len = iov_iter_count(from)) > 0) { |
e8344e66 | 1425 | size_t left; |
1426 | int n; | |
1427 | ||
e8344e66 | 1428 | vino = ceph_vino(inode); |
1429 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
715e4cd4 | 1430 | vino, pos, &len, 0, 1, |
e8344e66 | 1431 | CEPH_OSD_OP_WRITE, flags, snapc, |
1432 | ci->i_truncate_seq, | |
1433 | ci->i_truncate_size, | |
1434 | false); | |
1435 | if (IS_ERR(req)) { | |
1436 | ret = PTR_ERR(req); | |
eab87235 | 1437 | break; |
e8344e66 | 1438 | } |
1439 | ||
1440 | /* | |
1441 | * write from beginning of first page, | |
1442 | * regardless of io alignment | |
1443 | */ | |
09cbfeaf | 1444 | num_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e8344e66 | 1445 | |
687265e5 | 1446 | pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); |
124e68e7 SW |
1447 | if (IS_ERR(pages)) { |
1448 | ret = PTR_ERR(pages); | |
1449 | goto out; | |
1450 | } | |
e8344e66 | 1451 | |
1452 | left = len; | |
1453 | for (n = 0; n < num_pages; n++) { | |
125d725c | 1454 | size_t plen = min_t(size_t, left, PAGE_SIZE); |
4908b822 | 1455 | ret = copy_page_from_iter(pages[n], 0, plen, from); |
e8344e66 | 1456 | if (ret != plen) { |
1457 | ret = -EFAULT; | |
1458 | break; | |
1459 | } | |
1460 | left -= ret; | |
e8344e66 | 1461 | } |
1462 | ||
124e68e7 SW |
1463 | if (ret < 0) { |
1464 | ceph_release_page_vector(pages, num_pages); | |
1465 | goto out; | |
1466 | } | |
1467 | ||
e8344e66 | 1468 | req->r_inode = inode; |
124e68e7 | 1469 | |
e8344e66 | 1470 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0, |
1471 | false, true); | |
02ee07d3 | 1472 | |
bb873b53 | 1473 | req->r_mtime = mtime; |
e8344e66 | 1474 | ret = ceph_osdc_start_request(&fsc->client->osdc, req, false); |
1475 | if (!ret) | |
1476 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
124e68e7 | 1477 | |
8ae99ae2 | 1478 | ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, |
903f4fec | 1479 | req->r_end_latency, len, ret); |
124e68e7 | 1480 | out: |
e8344e66 | 1481 | ceph_osdc_put_request(req); |
26544c62 JL |
1482 | if (ret != 0) { |
1483 | ceph_set_error_write(ci); | |
e8344e66 | 1484 | break; |
26544c62 JL |
1485 | } |
1486 | ||
1487 | ceph_clear_error_write(ci); | |
1488 | pos += len; | |
1489 | written += len; | |
1490 | if (pos > i_size_read(inode)) { | |
1491 | check_caps = ceph_inode_set_size(inode, pos); | |
1492 | if (check_caps) | |
1493 | ceph_check_caps(ceph_inode(inode), | |
1494 | CHECK_CAPS_AUTHONLY, | |
1495 | NULL); | |
1496 | } | |
1497 | ||
e8344e66 | 1498 | } |
124e68e7 | 1499 | |
e8344e66 | 1500 | if (ret != -EOLDSNAPC && written > 0) { |
124e68e7 | 1501 | ret = written; |
e8344e66 | 1502 | iocb->ki_pos = pos; |
124e68e7 SW |
1503 | } |
1504 | return ret; | |
1505 | } | |
1506 | ||
1507 | /* | |
1508 | * Wrap generic_file_aio_read with checks for cap bits on the inode. | |
1509 | * Atomically grab references, so that those bits are not released | |
1510 | * back to the MDS mid-read. | |
1511 | * | |
1512 | * Hmm, the sync read case isn't actually async... should it be? | |
1513 | */ | |
3644424d | 1514 | static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to) |
124e68e7 SW |
1515 | { |
1516 | struct file *filp = iocb->ki_filp; | |
2962507c | 1517 | struct ceph_file_info *fi = filp->private_data; |
66ee59af | 1518 | size_t len = iov_iter_count(to); |
496ad9aa | 1519 | struct inode *inode = file_inode(filp); |
124e68e7 | 1520 | struct ceph_inode_info *ci = ceph_inode(inode); |
d1d96550 | 1521 | bool direct_lock = iocb->ki_flags & IOCB_DIRECT; |
124e68e7 | 1522 | ssize_t ret; |
2962507c | 1523 | int want, got = 0; |
83701246 | 1524 | int retry_op = 0, read = 0; |
124e68e7 | 1525 | |
6a026589 | 1526 | again: |
8eb4efb0 | 1527 | dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n", |
1528 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, inode); | |
1529 | ||
d1d96550 | 1530 | if (direct_lock) |
a81bc310 JL |
1531 | ceph_start_io_direct(inode); |
1532 | else | |
1533 | ceph_start_io_read(inode); | |
1534 | ||
2962507c SW |
1535 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
1536 | want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; | |
1537 | else | |
1538 | want = CEPH_CAP_FILE_CACHE; | |
e72968e1 | 1539 | ret = ceph_get_caps(filp, CEPH_CAP_FILE_RD, want, -1, &got); |
a81bc310 JL |
1540 | if (ret < 0) { |
1541 | if (iocb->ki_flags & IOCB_DIRECT) | |
1542 | ceph_end_io_direct(inode); | |
1543 | else | |
1544 | ceph_end_io_read(inode); | |
8eb4efb0 | 1545 | return ret; |
a81bc310 | 1546 | } |
124e68e7 | 1547 | |
2962507c | 1548 | if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 || |
2ba48ce5 | 1549 | (iocb->ki_flags & IOCB_DIRECT) || |
8eb4efb0 | 1550 | (fi->flags & CEPH_F_SYNC)) { |
8eb4efb0 | 1551 | |
1552 | dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n", | |
1553 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, | |
1554 | ceph_cap_string(got)); | |
1555 | ||
83701246 | 1556 | if (ci->i_inline_version == CEPH_INLINE_NONE) { |
c8fe9b17 YZ |
1557 | if (!retry_op && (iocb->ki_flags & IOCB_DIRECT)) { |
1558 | ret = ceph_direct_read_write(iocb, to, | |
1559 | NULL, NULL); | |
1560 | if (ret >= 0 && ret < len) | |
1561 | retry_op = CHECK_EOF; | |
1562 | } else { | |
1563 | ret = ceph_sync_read(iocb, to, &retry_op); | |
1564 | } | |
83701246 YZ |
1565 | } else { |
1566 | retry_op = READ_INLINE; | |
1567 | } | |
8eb4efb0 | 1568 | } else { |
5d988308 | 1569 | CEPH_DEFINE_RW_CONTEXT(rw_ctx, got); |
8eb4efb0 | 1570 | dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n", |
3644424d | 1571 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, |
8eb4efb0 | 1572 | ceph_cap_string(got)); |
5d988308 | 1573 | ceph_add_rw_context(fi, &rw_ctx); |
3644424d | 1574 | ret = generic_file_read_iter(iocb, to); |
5d988308 | 1575 | ceph_del_rw_context(fi, &rw_ctx); |
8eb4efb0 | 1576 | } |
a81bc310 | 1577 | |
124e68e7 SW |
1578 | dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n", |
1579 | inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret); | |
1580 | ceph_put_cap_refs(ci, got); | |
a81bc310 | 1581 | |
d1d96550 | 1582 | if (direct_lock) |
a81bc310 JL |
1583 | ceph_end_io_direct(inode); |
1584 | else | |
1585 | ceph_end_io_read(inode); | |
1586 | ||
c8fe9b17 | 1587 | if (retry_op > HAVE_RETRIED && ret >= 0) { |
83701246 YZ |
1588 | int statret; |
1589 | struct page *page = NULL; | |
1590 | loff_t i_size; | |
1591 | if (retry_op == READ_INLINE) { | |
687265e5 | 1592 | page = __page_cache_alloc(GFP_KERNEL); |
83701246 YZ |
1593 | if (!page) |
1594 | return -ENOMEM; | |
1595 | } | |
6a026589 | 1596 | |
83701246 YZ |
1597 | statret = __ceph_do_getattr(inode, page, |
1598 | CEPH_STAT_CAP_INLINE_DATA, !!page); | |
1599 | if (statret < 0) { | |
0d7718f6 NB |
1600 | if (page) |
1601 | __free_page(page); | |
83701246 YZ |
1602 | if (statret == -ENODATA) { |
1603 | BUG_ON(retry_op != READ_INLINE); | |
1604 | goto again; | |
1605 | } | |
1606 | return statret; | |
1607 | } | |
6a026589 | 1608 | |
83701246 YZ |
1609 | i_size = i_size_read(inode); |
1610 | if (retry_op == READ_INLINE) { | |
fcc02d2a YZ |
1611 | BUG_ON(ret > 0 || read > 0); |
1612 | if (iocb->ki_pos < i_size && | |
09cbfeaf | 1613 | iocb->ki_pos < PAGE_SIZE) { |
83701246 YZ |
1614 | loff_t end = min_t(loff_t, i_size, |
1615 | iocb->ki_pos + len); | |
09cbfeaf | 1616 | end = min_t(loff_t, end, PAGE_SIZE); |
83701246 YZ |
1617 | if (statret < end) |
1618 | zero_user_segment(page, statret, end); | |
1619 | ret = copy_page_to_iter(page, | |
1620 | iocb->ki_pos & ~PAGE_MASK, | |
1621 | end - iocb->ki_pos, to); | |
1622 | iocb->ki_pos += ret; | |
fcc02d2a YZ |
1623 | read += ret; |
1624 | } | |
1625 | if (iocb->ki_pos < i_size && read < len) { | |
1626 | size_t zlen = min_t(size_t, len - read, | |
1627 | i_size - iocb->ki_pos); | |
1628 | ret = iov_iter_zero(zlen, to); | |
1629 | iocb->ki_pos += ret; | |
1630 | read += ret; | |
83701246 YZ |
1631 | } |
1632 | __free_pages(page, 0); | |
fcc02d2a | 1633 | return read; |
83701246 | 1634 | } |
6a026589 SW |
1635 | |
1636 | /* hit EOF or hole? */ | |
83701246 | 1637 | if (retry_op == CHECK_EOF && iocb->ki_pos < i_size && |
fcc02d2a | 1638 | ret < len) { |
8eb4efb0 | 1639 | dout("sync_read hit hole, ppos %lld < size %lld" |
99c88e69 | 1640 | ", reading more\n", iocb->ki_pos, i_size); |
8eb4efb0 | 1641 | |
6a026589 | 1642 | read += ret; |
6a026589 | 1643 | len -= ret; |
c8fe9b17 | 1644 | retry_op = HAVE_RETRIED; |
6a026589 SW |
1645 | goto again; |
1646 | } | |
1647 | } | |
8eb4efb0 | 1648 | |
6a026589 SW |
1649 | if (ret >= 0) |
1650 | ret += read; | |
1651 | ||
124e68e7 SW |
1652 | return ret; |
1653 | } | |
1654 | ||
1655 | /* | |
1656 | * Take cap references to avoid releasing caps to MDS mid-write. | |
1657 | * | |
1658 | * If we are synchronous, and write with an old snap context, the OSD | |
1659 | * may return EOLDSNAPC. In that case, retry the write.. _after_ | |
1660 | * dropping our cap refs and allowing the pending snap to logically | |
1661 | * complete _before_ this write occurs. | |
1662 | * | |
1663 | * If we are near ENOSPC, write synchronously. | |
1664 | */ | |
4908b822 | 1665 | static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) |
124e68e7 SW |
1666 | { |
1667 | struct file *file = iocb->ki_filp; | |
33caad32 | 1668 | struct ceph_file_info *fi = file->private_data; |
496ad9aa | 1669 | struct inode *inode = file_inode(file); |
124e68e7 | 1670 | struct ceph_inode_info *ci = ceph_inode(inode); |
8687a3e2 | 1671 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
76142097 | 1672 | struct ceph_osd_client *osdc = &fsc->client->osdc; |
f66fd9f0 | 1673 | struct ceph_cap_flush *prealloc_cf; |
3309dd04 | 1674 | ssize_t count, written = 0; |
03d254ed | 1675 | int err, want, got; |
8e4473bb | 1676 | bool direct_lock = false; |
76142097 ID |
1677 | u32 map_flags; |
1678 | u64 pool_flags; | |
3309dd04 | 1679 | loff_t pos; |
8687a3e2 | 1680 | loff_t limit = max(i_size_read(inode), fsc->max_file_size); |
124e68e7 SW |
1681 | |
1682 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
1683 | return -EROFS; | |
1684 | ||
f66fd9f0 YZ |
1685 | prealloc_cf = ceph_alloc_cap_flush(); |
1686 | if (!prealloc_cf) | |
1687 | return -ENOMEM; | |
1688 | ||
8e4473bb XL |
1689 | if ((iocb->ki_flags & (IOCB_DIRECT | IOCB_APPEND)) == IOCB_DIRECT) |
1690 | direct_lock = true; | |
1691 | ||
a5cd74ad | 1692 | retry_snap: |
8e4473bb | 1693 | if (direct_lock) |
321fe13c JL |
1694 | ceph_start_io_direct(inode); |
1695 | else | |
1696 | ceph_start_io_write(inode); | |
03d254ed | 1697 | |
03d254ed | 1698 | /* We can write back this queue in page reclaim */ |
de1414a6 | 1699 | current->backing_dev_info = inode_to_bdi(inode); |
03d254ed | 1700 | |
55b0b31c YZ |
1701 | if (iocb->ki_flags & IOCB_APPEND) { |
1702 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); | |
1703 | if (err < 0) | |
1704 | goto out; | |
1705 | } | |
1706 | ||
3309dd04 AV |
1707 | err = generic_write_checks(iocb, from); |
1708 | if (err <= 0) | |
03d254ed YZ |
1709 | goto out; |
1710 | ||
3309dd04 | 1711 | pos = iocb->ki_pos; |
8687a3e2 CX |
1712 | if (unlikely(pos >= limit)) { |
1713 | err = -EFBIG; | |
1714 | goto out; | |
1715 | } else { | |
1716 | iov_iter_truncate(from, limit - pos); | |
1717 | } | |
1718 | ||
3309dd04 | 1719 | count = iov_iter_count(from); |
2b83845f LH |
1720 | if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) { |
1721 | err = -EDQUOT; | |
1722 | goto out; | |
1723 | } | |
1724 | ||
b11ed503 JL |
1725 | down_read(&osdc->lock); |
1726 | map_flags = osdc->osdmap->flags; | |
1727 | pool_flags = ceph_pg_pool_flags(osdc->osdmap, ci->i_layout.pool_id); | |
1728 | up_read(&osdc->lock); | |
1729 | if ((map_flags & CEPH_OSDMAP_FULL) || | |
1730 | (pool_flags & CEPH_POOL_FLAG_FULL)) { | |
1731 | err = -ENOSPC; | |
03d254ed | 1732 | goto out; |
b11ed503 | 1733 | } |
03d254ed | 1734 | |
b11ed503 | 1735 | err = file_remove_privs(file); |
03d254ed YZ |
1736 | if (err) |
1737 | goto out; | |
1738 | ||
28127bdd YZ |
1739 | if (ci->i_inline_version != CEPH_INLINE_NONE) { |
1740 | err = ceph_uninline_data(file, NULL); | |
1741 | if (err < 0) | |
1742 | goto out; | |
1743 | } | |
1744 | ||
ac7f29bf | 1745 | dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n", |
99c88e69 | 1746 | inode, ceph_vinop(inode), pos, count, i_size_read(inode)); |
7971bd92 SW |
1747 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
1748 | want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; | |
1749 | else | |
1750 | want = CEPH_CAP_FILE_BUFFER; | |
03d254ed | 1751 | got = 0; |
e72968e1 | 1752 | err = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, pos + count, &got); |
03d254ed | 1753 | if (err < 0) |
37505d57 | 1754 | goto out; |
124e68e7 | 1755 | |
b11ed503 JL |
1756 | err = file_update_time(file); |
1757 | if (err) | |
1758 | goto out_caps; | |
1759 | ||
1760 | inode_inc_iversion_raw(inode); | |
1761 | ||
ac7f29bf | 1762 | dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n", |
03d254ed | 1763 | inode, ceph_vinop(inode), pos, count, ceph_cap_string(got)); |
7971bd92 SW |
1764 | |
1765 | if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 || | |
26544c62 JL |
1766 | (iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) || |
1767 | (ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) { | |
5dda377c | 1768 | struct ceph_snap_context *snapc; |
4908b822 | 1769 | struct iov_iter data; |
5dda377c YZ |
1770 | |
1771 | spin_lock(&ci->i_ceph_lock); | |
1772 | if (__ceph_have_pending_cap_snap(ci)) { | |
1773 | struct ceph_cap_snap *capsnap = | |
1774 | list_last_entry(&ci->i_cap_snaps, | |
1775 | struct ceph_cap_snap, | |
1776 | ci_item); | |
1777 | snapc = ceph_get_snap_context(capsnap->context); | |
1778 | } else { | |
1779 | BUG_ON(!ci->i_head_snapc); | |
1780 | snapc = ceph_get_snap_context(ci->i_head_snapc); | |
1781 | } | |
1782 | spin_unlock(&ci->i_ceph_lock); | |
1783 | ||
4908b822 AV |
1784 | /* we might need to revert back to that point */ |
1785 | data = *from; | |
8e4473bb | 1786 | if (iocb->ki_flags & IOCB_DIRECT) |
c8fe9b17 YZ |
1787 | written = ceph_direct_read_write(iocb, &data, snapc, |
1788 | &prealloc_cf); | |
8e4473bb | 1789 | else |
5dda377c | 1790 | written = ceph_sync_write(iocb, &data, pos, snapc); |
8e4473bb XL |
1791 | if (direct_lock) |
1792 | ceph_end_io_direct(inode); | |
1793 | else | |
321fe13c | 1794 | ceph_end_io_write(inode); |
4908b822 AV |
1795 | if (written > 0) |
1796 | iov_iter_advance(from, written); | |
5dda377c | 1797 | ceph_put_snap_context(snapc); |
7971bd92 | 1798 | } else { |
b0d7c223 YZ |
1799 | /* |
1800 | * No need to acquire the i_truncate_mutex. Because | |
1801 | * the MDS revokes Fwb caps before sending truncate | |
1802 | * message to us. We can't get Fwb cap while there | |
1803 | * are pending vmtruncate. So write and vmtruncate | |
1804 | * can not run at the same time | |
1805 | */ | |
4908b822 | 1806 | written = generic_perform_write(file, from, pos); |
aec605f4 AV |
1807 | if (likely(written >= 0)) |
1808 | iocb->ki_pos = pos + written; | |
321fe13c | 1809 | ceph_end_io_write(inode); |
7971bd92 | 1810 | } |
d8de9ab6 | 1811 | |
03d254ed | 1812 | if (written >= 0) { |
fca65b4a | 1813 | int dirty; |
1ab302a0 | 1814 | |
be655596 | 1815 | spin_lock(&ci->i_ceph_lock); |
28127bdd | 1816 | ci->i_inline_version = CEPH_INLINE_NONE; |
f66fd9f0 YZ |
1817 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
1818 | &prealloc_cf); | |
be655596 | 1819 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
1820 | if (dirty) |
1821 | __mark_inode_dirty(inode, dirty); | |
1ab302a0 | 1822 | if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos)) |
a0d93e32 | 1823 | ceph_check_caps(ci, 0, NULL); |
124e68e7 | 1824 | } |
7971bd92 | 1825 | |
124e68e7 | 1826 | dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n", |
4908b822 | 1827 | inode, ceph_vinop(inode), pos, (unsigned)count, |
7971bd92 | 1828 | ceph_cap_string(got)); |
124e68e7 | 1829 | ceph_put_cap_refs(ci, got); |
7971bd92 | 1830 | |
a5cd74ad YZ |
1831 | if (written == -EOLDSNAPC) { |
1832 | dout("aio_write %p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n", | |
1833 | inode, ceph_vinop(inode), pos, (unsigned)count); | |
1834 | goto retry_snap; | |
1835 | } | |
1836 | ||
6aa657c8 | 1837 | if (written >= 0) { |
76142097 ID |
1838 | if ((map_flags & CEPH_OSDMAP_NEARFULL) || |
1839 | (pool_flags & CEPH_POOL_FLAG_NEARFULL)) | |
6aa657c8 | 1840 | iocb->ki_flags |= IOCB_DSYNC; |
6aa657c8 | 1841 | written = generic_write_sync(iocb, written); |
6070e0c1 | 1842 | } |
03d254ed | 1843 | |
2f75e9e1 | 1844 | goto out_unlocked; |
b11ed503 JL |
1845 | out_caps: |
1846 | ceph_put_cap_refs(ci, got); | |
03d254ed | 1847 | out: |
8e4473bb | 1848 | if (direct_lock) |
321fe13c JL |
1849 | ceph_end_io_direct(inode); |
1850 | else | |
1851 | ceph_end_io_write(inode); | |
2f75e9e1 | 1852 | out_unlocked: |
f66fd9f0 | 1853 | ceph_free_cap_flush(prealloc_cf); |
03d254ed | 1854 | current->backing_dev_info = NULL; |
03d254ed | 1855 | return written ? written : err; |
124e68e7 SW |
1856 | } |
1857 | ||
1858 | /* | |
1859 | * llseek. be sure to verify file size on SEEK_END. | |
1860 | */ | |
965c8e59 | 1861 | static loff_t ceph_llseek(struct file *file, loff_t offset, int whence) |
124e68e7 SW |
1862 | { |
1863 | struct inode *inode = file->f_mapping->host; | |
9da12e3a | 1864 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
99c88e69 | 1865 | loff_t i_size; |
955818cd | 1866 | loff_t ret; |
124e68e7 | 1867 | |
5955102c | 1868 | inode_lock(inode); |
6a82c47a | 1869 | |
965c8e59 | 1870 | if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) { |
508b32d8 | 1871 | ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); |
955818cd | 1872 | if (ret < 0) |
124e68e7 | 1873 | goto out; |
06222e49 JB |
1874 | } |
1875 | ||
99c88e69 | 1876 | i_size = i_size_read(inode); |
965c8e59 | 1877 | switch (whence) { |
06222e49 | 1878 | case SEEK_END: |
99c88e69 | 1879 | offset += i_size; |
124e68e7 SW |
1880 | break; |
1881 | case SEEK_CUR: | |
1882 | /* | |
1883 | * Here we special-case the lseek(fd, 0, SEEK_CUR) | |
1884 | * position-querying operation. Avoid rewriting the "same" | |
1885 | * f_pos value back to the file because a concurrent read(), | |
1886 | * write() or lseek() might have altered it | |
1887 | */ | |
1888 | if (offset == 0) { | |
955818cd | 1889 | ret = file->f_pos; |
124e68e7 SW |
1890 | goto out; |
1891 | } | |
1892 | offset += file->f_pos; | |
1893 | break; | |
06222e49 | 1894 | case SEEK_DATA: |
397f2389 | 1895 | if (offset < 0 || offset >= i_size) { |
06222e49 JB |
1896 | ret = -ENXIO; |
1897 | goto out; | |
1898 | } | |
1899 | break; | |
1900 | case SEEK_HOLE: | |
397f2389 | 1901 | if (offset < 0 || offset >= i_size) { |
06222e49 JB |
1902 | ret = -ENXIO; |
1903 | goto out; | |
1904 | } | |
99c88e69 | 1905 | offset = i_size; |
06222e49 | 1906 | break; |
124e68e7 SW |
1907 | } |
1908 | ||
9da12e3a | 1909 | ret = vfs_setpos(file, offset, max(i_size, fsc->max_file_size)); |
124e68e7 SW |
1910 | |
1911 | out: | |
5955102c | 1912 | inode_unlock(inode); |
955818cd | 1913 | return ret; |
124e68e7 SW |
1914 | } |
1915 | ||
ad7a60de LW |
1916 | static inline void ceph_zero_partial_page( |
1917 | struct inode *inode, loff_t offset, unsigned size) | |
1918 | { | |
1919 | struct page *page; | |
09cbfeaf | 1920 | pgoff_t index = offset >> PAGE_SHIFT; |
ad7a60de LW |
1921 | |
1922 | page = find_lock_page(inode->i_mapping, index); | |
1923 | if (page) { | |
1924 | wait_on_page_writeback(page); | |
09cbfeaf | 1925 | zero_user(page, offset & (PAGE_SIZE - 1), size); |
ad7a60de | 1926 | unlock_page(page); |
09cbfeaf | 1927 | put_page(page); |
ad7a60de LW |
1928 | } |
1929 | } | |
1930 | ||
1931 | static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset, | |
1932 | loff_t length) | |
1933 | { | |
09cbfeaf | 1934 | loff_t nearly = round_up(offset, PAGE_SIZE); |
ad7a60de LW |
1935 | if (offset < nearly) { |
1936 | loff_t size = nearly - offset; | |
1937 | if (length < size) | |
1938 | size = length; | |
1939 | ceph_zero_partial_page(inode, offset, size); | |
1940 | offset += size; | |
1941 | length -= size; | |
1942 | } | |
09cbfeaf KS |
1943 | if (length >= PAGE_SIZE) { |
1944 | loff_t size = round_down(length, PAGE_SIZE); | |
ad7a60de LW |
1945 | truncate_pagecache_range(inode, offset, offset + size - 1); |
1946 | offset += size; | |
1947 | length -= size; | |
1948 | } | |
1949 | if (length) | |
1950 | ceph_zero_partial_page(inode, offset, length); | |
1951 | } | |
1952 | ||
1953 | static int ceph_zero_partial_object(struct inode *inode, | |
1954 | loff_t offset, loff_t *length) | |
1955 | { | |
1956 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1957 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
1958 | struct ceph_osd_request *req; | |
1959 | int ret = 0; | |
1960 | loff_t zero = 0; | |
1961 | int op; | |
1962 | ||
1963 | if (!length) { | |
1964 | op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE; | |
1965 | length = &zero; | |
1966 | } else { | |
1967 | op = CEPH_OSD_OP_ZERO; | |
1968 | } | |
1969 | ||
1970 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
1971 | ceph_vino(inode), | |
1972 | offset, length, | |
715e4cd4 | 1973 | 0, 1, op, |
54ea0046 | 1974 | CEPH_OSD_FLAG_WRITE, |
ad7a60de LW |
1975 | NULL, 0, 0, false); |
1976 | if (IS_ERR(req)) { | |
1977 | ret = PTR_ERR(req); | |
1978 | goto out; | |
1979 | } | |
1980 | ||
fac02ddf | 1981 | req->r_mtime = inode->i_mtime; |
ad7a60de LW |
1982 | ret = ceph_osdc_start_request(&fsc->client->osdc, req, false); |
1983 | if (!ret) { | |
1984 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
1985 | if (ret == -ENOENT) | |
1986 | ret = 0; | |
1987 | } | |
1988 | ceph_osdc_put_request(req); | |
1989 | ||
1990 | out: | |
1991 | return ret; | |
1992 | } | |
1993 | ||
1994 | static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length) | |
1995 | { | |
1996 | int ret = 0; | |
1997 | struct ceph_inode_info *ci = ceph_inode(inode); | |
7627151e YZ |
1998 | s32 stripe_unit = ci->i_layout.stripe_unit; |
1999 | s32 stripe_count = ci->i_layout.stripe_count; | |
2000 | s32 object_size = ci->i_layout.object_size; | |
b314a90d SW |
2001 | u64 object_set_size = object_size * stripe_count; |
2002 | u64 nearly, t; | |
2003 | ||
2004 | /* round offset up to next period boundary */ | |
2005 | nearly = offset + object_set_size - 1; | |
2006 | t = nearly; | |
2007 | nearly -= do_div(t, object_set_size); | |
ad7a60de | 2008 | |
ad7a60de LW |
2009 | while (length && offset < nearly) { |
2010 | loff_t size = length; | |
2011 | ret = ceph_zero_partial_object(inode, offset, &size); | |
2012 | if (ret < 0) | |
2013 | return ret; | |
2014 | offset += size; | |
2015 | length -= size; | |
2016 | } | |
2017 | while (length >= object_set_size) { | |
2018 | int i; | |
2019 | loff_t pos = offset; | |
2020 | for (i = 0; i < stripe_count; ++i) { | |
2021 | ret = ceph_zero_partial_object(inode, pos, NULL); | |
2022 | if (ret < 0) | |
2023 | return ret; | |
2024 | pos += stripe_unit; | |
2025 | } | |
2026 | offset += object_set_size; | |
2027 | length -= object_set_size; | |
2028 | } | |
2029 | while (length) { | |
2030 | loff_t size = length; | |
2031 | ret = ceph_zero_partial_object(inode, offset, &size); | |
2032 | if (ret < 0) | |
2033 | return ret; | |
2034 | offset += size; | |
2035 | length -= size; | |
2036 | } | |
2037 | return ret; | |
2038 | } | |
2039 | ||
2040 | static long ceph_fallocate(struct file *file, int mode, | |
2041 | loff_t offset, loff_t length) | |
2042 | { | |
2043 | struct ceph_file_info *fi = file->private_data; | |
aa8b60e0 | 2044 | struct inode *inode = file_inode(file); |
ad7a60de | 2045 | struct ceph_inode_info *ci = ceph_inode(inode); |
f66fd9f0 | 2046 | struct ceph_cap_flush *prealloc_cf; |
ad7a60de LW |
2047 | int want, got = 0; |
2048 | int dirty; | |
2049 | int ret = 0; | |
2050 | loff_t endoff = 0; | |
2051 | loff_t size; | |
2052 | ||
bddff633 | 2053 | if (mode != (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
494d77bf YZ |
2054 | return -EOPNOTSUPP; |
2055 | ||
ad7a60de LW |
2056 | if (!S_ISREG(inode->i_mode)) |
2057 | return -EOPNOTSUPP; | |
2058 | ||
f66fd9f0 YZ |
2059 | prealloc_cf = ceph_alloc_cap_flush(); |
2060 | if (!prealloc_cf) | |
2061 | return -ENOMEM; | |
2062 | ||
5955102c | 2063 | inode_lock(inode); |
ad7a60de LW |
2064 | |
2065 | if (ceph_snap(inode) != CEPH_NOSNAP) { | |
2066 | ret = -EROFS; | |
2067 | goto unlock; | |
2068 | } | |
2069 | ||
28127bdd YZ |
2070 | if (ci->i_inline_version != CEPH_INLINE_NONE) { |
2071 | ret = ceph_uninline_data(file, NULL); | |
2072 | if (ret < 0) | |
2073 | goto unlock; | |
2074 | } | |
2075 | ||
ad7a60de | 2076 | size = i_size_read(inode); |
bddff633 LH |
2077 | |
2078 | /* Are we punching a hole beyond EOF? */ | |
2079 | if (offset >= size) | |
2080 | goto unlock; | |
2081 | if ((offset + length) > size) | |
2082 | length = size - offset; | |
ad7a60de LW |
2083 | |
2084 | if (fi->fmode & CEPH_FILE_MODE_LAZY) | |
2085 | want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; | |
2086 | else | |
2087 | want = CEPH_CAP_FILE_BUFFER; | |
2088 | ||
e72968e1 | 2089 | ret = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, endoff, &got); |
ad7a60de LW |
2090 | if (ret < 0) |
2091 | goto unlock; | |
2092 | ||
057ba5b2 | 2093 | filemap_invalidate_lock(inode->i_mapping); |
bddff633 LH |
2094 | ceph_zero_pagecache_range(inode, offset, length); |
2095 | ret = ceph_zero_objects(inode, offset, length); | |
ad7a60de LW |
2096 | |
2097 | if (!ret) { | |
2098 | spin_lock(&ci->i_ceph_lock); | |
28127bdd | 2099 | ci->i_inline_version = CEPH_INLINE_NONE; |
f66fd9f0 YZ |
2100 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
2101 | &prealloc_cf); | |
ad7a60de LW |
2102 | spin_unlock(&ci->i_ceph_lock); |
2103 | if (dirty) | |
2104 | __mark_inode_dirty(inode, dirty); | |
2105 | } | |
057ba5b2 | 2106 | filemap_invalidate_unlock(inode->i_mapping); |
ad7a60de LW |
2107 | |
2108 | ceph_put_cap_refs(ci, got); | |
2109 | unlock: | |
5955102c | 2110 | inode_unlock(inode); |
f66fd9f0 | 2111 | ceph_free_cap_flush(prealloc_cf); |
ad7a60de LW |
2112 | return ret; |
2113 | } | |
2114 | ||
503f82a9 LH |
2115 | /* |
2116 | * This function tries to get FILE_WR capabilities for dst_ci and FILE_RD for | |
2117 | * src_ci. Two attempts are made to obtain both caps, and an error is return if | |
2118 | * this fails; zero is returned on success. | |
2119 | */ | |
5e3ded1b YZ |
2120 | static int get_rd_wr_caps(struct file *src_filp, int *src_got, |
2121 | struct file *dst_filp, | |
503f82a9 LH |
2122 | loff_t dst_endoff, int *dst_got) |
2123 | { | |
2124 | int ret = 0; | |
2125 | bool retrying = false; | |
2126 | ||
2127 | retry_caps: | |
5e3ded1b | 2128 | ret = ceph_get_caps(dst_filp, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER, |
e72968e1 | 2129 | dst_endoff, dst_got); |
503f82a9 LH |
2130 | if (ret < 0) |
2131 | return ret; | |
2132 | ||
2133 | /* | |
2134 | * Since we're already holding the FILE_WR capability for the dst file, | |
2135 | * we would risk a deadlock by using ceph_get_caps. Thus, we'll do some | |
2136 | * retry dance instead to try to get both capabilities. | |
2137 | */ | |
5e3ded1b YZ |
2138 | ret = ceph_try_get_caps(file_inode(src_filp), |
2139 | CEPH_CAP_FILE_RD, CEPH_CAP_FILE_SHARED, | |
503f82a9 LH |
2140 | false, src_got); |
2141 | if (ret <= 0) { | |
2142 | /* Start by dropping dst_ci caps and getting src_ci caps */ | |
5e3ded1b | 2143 | ceph_put_cap_refs(ceph_inode(file_inode(dst_filp)), *dst_got); |
503f82a9 LH |
2144 | if (retrying) { |
2145 | if (!ret) | |
2146 | /* ceph_try_get_caps masks EAGAIN */ | |
2147 | ret = -EAGAIN; | |
2148 | return ret; | |
2149 | } | |
5e3ded1b | 2150 | ret = ceph_get_caps(src_filp, CEPH_CAP_FILE_RD, |
e72968e1 | 2151 | CEPH_CAP_FILE_SHARED, -1, src_got); |
503f82a9 LH |
2152 | if (ret < 0) |
2153 | return ret; | |
2154 | /*... drop src_ci caps too, and retry */ | |
5e3ded1b | 2155 | ceph_put_cap_refs(ceph_inode(file_inode(src_filp)), *src_got); |
503f82a9 LH |
2156 | retrying = true; |
2157 | goto retry_caps; | |
2158 | } | |
2159 | return ret; | |
2160 | } | |
2161 | ||
2162 | static void put_rd_wr_caps(struct ceph_inode_info *src_ci, int src_got, | |
2163 | struct ceph_inode_info *dst_ci, int dst_got) | |
2164 | { | |
2165 | ceph_put_cap_refs(src_ci, src_got); | |
2166 | ceph_put_cap_refs(dst_ci, dst_got); | |
2167 | } | |
2168 | ||
2169 | /* | |
2170 | * This function does several size-related checks, returning an error if: | |
2171 | * - source file is smaller than off+len | |
2172 | * - destination file size is not OK (inode_newsize_ok()) | |
2173 | * - max bytes quotas is exceeded | |
2174 | */ | |
2175 | static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode, | |
2176 | loff_t src_off, loff_t dst_off, size_t len) | |
2177 | { | |
2178 | loff_t size, endoff; | |
2179 | ||
2180 | size = i_size_read(src_inode); | |
2181 | /* | |
2182 | * Don't copy beyond source file EOF. Instead of simply setting length | |
2183 | * to (size - src_off), just drop to VFS default implementation, as the | |
2184 | * local i_size may be stale due to other clients writing to the source | |
2185 | * inode. | |
2186 | */ | |
2187 | if (src_off + len > size) { | |
2188 | dout("Copy beyond EOF (%llu + %zu > %llu)\n", | |
2189 | src_off, len, size); | |
2190 | return -EOPNOTSUPP; | |
2191 | } | |
2192 | size = i_size_read(dst_inode); | |
2193 | ||
2194 | endoff = dst_off + len; | |
2195 | if (inode_newsize_ok(dst_inode, endoff)) | |
2196 | return -EOPNOTSUPP; | |
2197 | ||
2198 | if (ceph_quota_is_max_bytes_exceeded(dst_inode, endoff)) | |
2199 | return -EDQUOT; | |
2200 | ||
2201 | return 0; | |
2202 | } | |
2203 | ||
1b0c3b9f LH |
2204 | static ssize_t ceph_do_objects_copy(struct ceph_inode_info *src_ci, u64 *src_off, |
2205 | struct ceph_inode_info *dst_ci, u64 *dst_off, | |
2206 | struct ceph_fs_client *fsc, | |
2207 | size_t len, unsigned int flags) | |
2208 | { | |
2209 | struct ceph_object_locator src_oloc, dst_oloc; | |
2210 | struct ceph_object_id src_oid, dst_oid; | |
2211 | size_t bytes = 0; | |
2212 | u64 src_objnum, src_objoff, dst_objnum, dst_objoff; | |
2213 | u32 src_objlen, dst_objlen; | |
2214 | u32 object_size = src_ci->i_layout.object_size; | |
2215 | int ret; | |
2216 | ||
2217 | src_oloc.pool = src_ci->i_layout.pool_id; | |
2218 | src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns); | |
2219 | dst_oloc.pool = dst_ci->i_layout.pool_id; | |
2220 | dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns); | |
2221 | ||
2222 | while (len >= object_size) { | |
2223 | ceph_calc_file_object_mapping(&src_ci->i_layout, *src_off, | |
2224 | object_size, &src_objnum, | |
2225 | &src_objoff, &src_objlen); | |
2226 | ceph_calc_file_object_mapping(&dst_ci->i_layout, *dst_off, | |
2227 | object_size, &dst_objnum, | |
2228 | &dst_objoff, &dst_objlen); | |
2229 | ceph_oid_init(&src_oid); | |
2230 | ceph_oid_printf(&src_oid, "%llx.%08llx", | |
2231 | src_ci->i_vino.ino, src_objnum); | |
2232 | ceph_oid_init(&dst_oid); | |
2233 | ceph_oid_printf(&dst_oid, "%llx.%08llx", | |
2234 | dst_ci->i_vino.ino, dst_objnum); | |
2235 | /* Do an object remote copy */ | |
2236 | ret = ceph_osdc_copy_from(&fsc->client->osdc, | |
2237 | src_ci->i_vino.snap, 0, | |
2238 | &src_oid, &src_oloc, | |
2239 | CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL | | |
2240 | CEPH_OSD_OP_FLAG_FADVISE_NOCACHE, | |
2241 | &dst_oid, &dst_oloc, | |
2242 | CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL | | |
2243 | CEPH_OSD_OP_FLAG_FADVISE_DONTNEED, | |
2244 | dst_ci->i_truncate_seq, | |
2245 | dst_ci->i_truncate_size, | |
2246 | CEPH_OSD_COPY_FROM_FLAG_TRUNCATE_SEQ); | |
2247 | if (ret) { | |
2248 | if (ret == -EOPNOTSUPP) { | |
2249 | fsc->have_copy_from2 = false; | |
2250 | pr_notice("OSDs don't support copy-from2; disabling copy offload\n"); | |
2251 | } | |
2252 | dout("ceph_osdc_copy_from returned %d\n", ret); | |
2253 | if (!bytes) | |
2254 | bytes = ret; | |
2255 | goto out; | |
2256 | } | |
2257 | len -= object_size; | |
2258 | bytes += object_size; | |
2259 | *src_off += object_size; | |
2260 | *dst_off += object_size; | |
2261 | } | |
2262 | ||
2263 | out: | |
2264 | ceph_oloc_destroy(&src_oloc); | |
2265 | ceph_oloc_destroy(&dst_oloc); | |
2266 | return bytes; | |
2267 | } | |
2268 | ||
64bf5ff5 DC |
2269 | static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off, |
2270 | struct file *dst_file, loff_t dst_off, | |
2271 | size_t len, unsigned int flags) | |
503f82a9 LH |
2272 | { |
2273 | struct inode *src_inode = file_inode(src_file); | |
2274 | struct inode *dst_inode = file_inode(dst_file); | |
2275 | struct ceph_inode_info *src_ci = ceph_inode(src_inode); | |
2276 | struct ceph_inode_info *dst_ci = ceph_inode(dst_inode); | |
2277 | struct ceph_cap_flush *prealloc_cf; | |
6fd4e634 | 2278 | struct ceph_fs_client *src_fsc = ceph_inode_to_client(src_inode); |
1b0c3b9f LH |
2279 | loff_t size; |
2280 | ssize_t ret = -EIO, bytes; | |
503f82a9 | 2281 | u64 src_objnum, dst_objnum, src_objoff, dst_objoff; |
1b0c3b9f | 2282 | u32 src_objlen, dst_objlen; |
503f82a9 | 2283 | int src_got = 0, dst_got = 0, err, dirty; |
503f82a9 | 2284 | |
6fd4e634 LH |
2285 | if (src_inode->i_sb != dst_inode->i_sb) { |
2286 | struct ceph_fs_client *dst_fsc = ceph_inode_to_client(dst_inode); | |
2287 | ||
2288 | if (ceph_fsid_compare(&src_fsc->client->fsid, | |
2289 | &dst_fsc->client->fsid)) { | |
2290 | dout("Copying files across clusters: src: %pU dst: %pU\n", | |
2291 | &src_fsc->client->fsid, &dst_fsc->client->fsid); | |
2292 | return -EXDEV; | |
2293 | } | |
2294 | } | |
503f82a9 LH |
2295 | if (ceph_snap(dst_inode) != CEPH_NOSNAP) |
2296 | return -EROFS; | |
2297 | ||
2298 | /* | |
2299 | * Some of the checks below will return -EOPNOTSUPP, which will force a | |
2300 | * fallback to the default VFS copy_file_range implementation. This is | |
2301 | * desirable in several cases (for ex, the 'len' is smaller than the | |
2302 | * size of the objects, or in cases where that would be more | |
2303 | * efficient). | |
2304 | */ | |
2305 | ||
6fd4e634 | 2306 | if (ceph_test_mount_opt(src_fsc, NOCOPYFROM)) |
ea4cdc54 LH |
2307 | return -EOPNOTSUPP; |
2308 | ||
78beb0ff LH |
2309 | if (!src_fsc->have_copy_from2) |
2310 | return -EOPNOTSUPP; | |
2311 | ||
a3a08193 LH |
2312 | /* |
2313 | * Striped file layouts require that we copy partial objects, but the | |
2314 | * OSD copy-from operation only supports full-object copies. Limit | |
2315 | * this to non-striped file layouts for now. | |
2316 | */ | |
503f82a9 | 2317 | if ((src_ci->i_layout.stripe_unit != dst_ci->i_layout.stripe_unit) || |
a3a08193 LH |
2318 | (src_ci->i_layout.stripe_count != 1) || |
2319 | (dst_ci->i_layout.stripe_count != 1) || | |
2320 | (src_ci->i_layout.object_size != dst_ci->i_layout.object_size)) { | |
2321 | dout("Invalid src/dst files layout\n"); | |
503f82a9 | 2322 | return -EOPNOTSUPP; |
a3a08193 | 2323 | } |
503f82a9 LH |
2324 | |
2325 | if (len < src_ci->i_layout.object_size) | |
2326 | return -EOPNOTSUPP; /* no remote copy will be done */ | |
2327 | ||
2328 | prealloc_cf = ceph_alloc_cap_flush(); | |
2329 | if (!prealloc_cf) | |
2330 | return -ENOMEM; | |
2331 | ||
c2c6d3ce | 2332 | /* Start by sync'ing the source and destination files */ |
503f82a9 | 2333 | ret = file_write_and_wait_range(src_file, src_off, (src_off + len)); |
c2c6d3ce LH |
2334 | if (ret < 0) { |
2335 | dout("failed to write src file (%zd)\n", ret); | |
2336 | goto out; | |
2337 | } | |
2338 | ret = file_write_and_wait_range(dst_file, dst_off, (dst_off + len)); | |
2339 | if (ret < 0) { | |
2340 | dout("failed to write dst file (%zd)\n", ret); | |
503f82a9 | 2341 | goto out; |
c2c6d3ce | 2342 | } |
503f82a9 LH |
2343 | |
2344 | /* | |
2345 | * We need FILE_WR caps for dst_ci and FILE_RD for src_ci as other | |
2346 | * clients may have dirty data in their caches. And OSDs know nothing | |
2347 | * about caps, so they can't safely do the remote object copies. | |
2348 | */ | |
5e3ded1b YZ |
2349 | err = get_rd_wr_caps(src_file, &src_got, |
2350 | dst_file, (dst_off + len), &dst_got); | |
503f82a9 LH |
2351 | if (err < 0) { |
2352 | dout("get_rd_wr_caps returned %d\n", err); | |
2353 | ret = -EOPNOTSUPP; | |
2354 | goto out; | |
2355 | } | |
2356 | ||
2357 | ret = is_file_size_ok(src_inode, dst_inode, src_off, dst_off, len); | |
2358 | if (ret < 0) | |
2359 | goto out_caps; | |
2360 | ||
503f82a9 LH |
2361 | /* Drop dst file cached pages */ |
2362 | ret = invalidate_inode_pages2_range(dst_inode->i_mapping, | |
2363 | dst_off >> PAGE_SHIFT, | |
1b0c3b9f | 2364 | (dst_off + len) >> PAGE_SHIFT); |
503f82a9 LH |
2365 | if (ret < 0) { |
2366 | dout("Failed to invalidate inode pages (%zd)\n", ret); | |
2367 | ret = 0; /* XXX */ | |
2368 | } | |
503f82a9 LH |
2369 | ceph_calc_file_object_mapping(&src_ci->i_layout, src_off, |
2370 | src_ci->i_layout.object_size, | |
2371 | &src_objnum, &src_objoff, &src_objlen); | |
2372 | ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off, | |
2373 | dst_ci->i_layout.object_size, | |
2374 | &dst_objnum, &dst_objoff, &dst_objlen); | |
2375 | /* object-level offsets need to the same */ | |
2376 | if (src_objoff != dst_objoff) { | |
2377 | ret = -EOPNOTSUPP; | |
2378 | goto out_caps; | |
2379 | } | |
2380 | ||
2381 | /* | |
2382 | * Do a manual copy if the object offset isn't object aligned. | |
2383 | * 'src_objlen' contains the bytes left until the end of the object, | |
2384 | * starting at the src_off | |
2385 | */ | |
2386 | if (src_objoff) { | |
1b0c3b9f LH |
2387 | dout("Initial partial copy of %u bytes\n", src_objlen); |
2388 | ||
503f82a9 LH |
2389 | /* |
2390 | * we need to temporarily drop all caps as we'll be calling | |
2391 | * {read,write}_iter, which will get caps again. | |
2392 | */ | |
2393 | put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got); | |
2394 | ret = do_splice_direct(src_file, &src_off, dst_file, | |
2395 | &dst_off, src_objlen, flags); | |
1b0c3b9f LH |
2396 | /* Abort on short copies or on error */ |
2397 | if (ret < src_objlen) { | |
2398 | dout("Failed partial copy (%zd)\n", ret); | |
503f82a9 LH |
2399 | goto out; |
2400 | } | |
2401 | len -= ret; | |
5e3ded1b YZ |
2402 | err = get_rd_wr_caps(src_file, &src_got, |
2403 | dst_file, (dst_off + len), &dst_got); | |
503f82a9 LH |
2404 | if (err < 0) |
2405 | goto out; | |
2406 | err = is_file_size_ok(src_inode, dst_inode, | |
2407 | src_off, dst_off, len); | |
2408 | if (err < 0) | |
2409 | goto out_caps; | |
2410 | } | |
503f82a9 | 2411 | |
1b0c3b9f LH |
2412 | size = i_size_read(dst_inode); |
2413 | bytes = ceph_do_objects_copy(src_ci, &src_off, dst_ci, &dst_off, | |
2414 | src_fsc, len, flags); | |
2415 | if (bytes <= 0) { | |
2416 | if (!ret) | |
2417 | ret = bytes; | |
2418 | goto out_caps; | |
2419 | } | |
2420 | dout("Copied %zu bytes out of %zu\n", bytes, len); | |
2421 | len -= bytes; | |
2422 | ret += bytes; | |
503f82a9 LH |
2423 | |
2424 | file_update_time(dst_file); | |
5c308356 JL |
2425 | inode_inc_iversion_raw(dst_inode); |
2426 | ||
1b0c3b9f | 2427 | if (dst_off > size) { |
503f82a9 | 2428 | /* Let the MDS know about dst file size change */ |
a0d93e32 YZ |
2429 | if (ceph_inode_set_size(dst_inode, dst_off) || |
2430 | ceph_quota_is_max_bytes_approaching(dst_inode, dst_off)) | |
2431 | ceph_check_caps(dst_ci, CHECK_CAPS_AUTHONLY, NULL); | |
503f82a9 LH |
2432 | } |
2433 | /* Mark Fw dirty */ | |
2434 | spin_lock(&dst_ci->i_ceph_lock); | |
2435 | dst_ci->i_inline_version = CEPH_INLINE_NONE; | |
2436 | dirty = __ceph_mark_dirty_caps(dst_ci, CEPH_CAP_FILE_WR, &prealloc_cf); | |
2437 | spin_unlock(&dst_ci->i_ceph_lock); | |
2438 | if (dirty) | |
2439 | __mark_inode_dirty(dst_inode, dirty); | |
2440 | ||
2441 | out_caps: | |
2442 | put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got); | |
2443 | ||
1b0c3b9f LH |
2444 | /* |
2445 | * Do the final manual copy if we still have some bytes left, unless | |
2446 | * there were errors in remote object copies (len >= object_size). | |
2447 | */ | |
2448 | if (len && (len < src_ci->i_layout.object_size)) { | |
2449 | dout("Final partial copy of %zu bytes\n", len); | |
2450 | bytes = do_splice_direct(src_file, &src_off, dst_file, | |
2451 | &dst_off, len, flags); | |
2452 | if (bytes > 0) | |
2453 | ret += bytes; | |
2454 | else | |
2455 | dout("Failed partial copy (%zd)\n", bytes); | |
503f82a9 LH |
2456 | } |
2457 | ||
2458 | out: | |
2459 | ceph_free_cap_flush(prealloc_cf); | |
2460 | ||
2461 | return ret; | |
2462 | } | |
2463 | ||
64bf5ff5 DC |
2464 | static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off, |
2465 | struct file *dst_file, loff_t dst_off, | |
2466 | size_t len, unsigned int flags) | |
2467 | { | |
2468 | ssize_t ret; | |
2469 | ||
2470 | ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off, | |
2471 | len, flags); | |
2472 | ||
5dae222a | 2473 | if (ret == -EOPNOTSUPP || ret == -EXDEV) |
64bf5ff5 DC |
2474 | ret = generic_copy_file_range(src_file, src_off, dst_file, |
2475 | dst_off, len, flags); | |
2476 | return ret; | |
2477 | } | |
2478 | ||
124e68e7 SW |
2479 | const struct file_operations ceph_file_fops = { |
2480 | .open = ceph_open, | |
2481 | .release = ceph_release, | |
2482 | .llseek = ceph_llseek, | |
3644424d | 2483 | .read_iter = ceph_read_iter, |
4908b822 | 2484 | .write_iter = ceph_write_iter, |
124e68e7 SW |
2485 | .mmap = ceph_mmap, |
2486 | .fsync = ceph_fsync, | |
40819f6f | 2487 | .lock = ceph_lock, |
496ceaf1 | 2488 | .setlease = simple_nosetlease, |
40819f6f | 2489 | .flock = ceph_flock, |
7ce469a5 | 2490 | .splice_read = generic_file_splice_read, |
3551dd79 | 2491 | .splice_write = iter_file_splice_write, |
124e68e7 | 2492 | .unlocked_ioctl = ceph_ioctl, |
18bd6caa | 2493 | .compat_ioctl = compat_ptr_ioctl, |
ad7a60de | 2494 | .fallocate = ceph_fallocate, |
503f82a9 | 2495 | .copy_file_range = ceph_copy_file_range, |
124e68e7 | 2496 | }; |