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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 | ||
1ef255e2 | 98 | bytes = iov_iter_get_pages2(iter, pages, maxsize - size, |
fc218544 ID |
99 | ITER_GET_BVECS_PAGES, &start); |
100 | if (bytes < 0) | |
101 | return size ?: bytes; | |
102 | ||
fc218544 ID |
103 | size += bytes; |
104 | ||
105 | for ( ; bytes; idx++, bvec_idx++) { | |
106 | struct bio_vec bv = { | |
107 | .bv_page = pages[idx], | |
108 | .bv_len = min_t(int, bytes, PAGE_SIZE - start), | |
109 | .bv_offset = start, | |
110 | }; | |
111 | ||
112 | bvecs[bvec_idx] = bv; | |
113 | bytes -= bv.bv_len; | |
114 | start = 0; | |
115 | } | |
116 | } | |
117 | ||
118 | return size; | |
b5b98989 ZC |
119 | } |
120 | ||
121 | /* | |
fc218544 ID |
122 | * iov_iter_get_pages() only considers one iov_iter segment, no matter |
123 | * what maxsize or maxpages are given. For ITER_BVEC that is a single | |
124 | * page. | |
125 | * | |
126 | * Attempt to get up to @maxsize bytes worth of pages from @iter. | |
127 | * Return the number of bytes in the created bio_vec array, or an error. | |
b5b98989 | 128 | */ |
fc218544 ID |
129 | static ssize_t iter_get_bvecs_alloc(struct iov_iter *iter, size_t maxsize, |
130 | struct bio_vec **bvecs, int *num_bvecs) | |
b5b98989 | 131 | { |
fc218544 ID |
132 | struct bio_vec *bv; |
133 | size_t orig_count = iov_iter_count(iter); | |
134 | ssize_t bytes; | |
135 | int npages; | |
b5b98989 | 136 | |
fc218544 ID |
137 | iov_iter_truncate(iter, maxsize); |
138 | npages = iov_iter_npages(iter, INT_MAX); | |
139 | iov_iter_reexpand(iter, orig_count); | |
b5b98989 | 140 | |
fc218544 ID |
141 | /* |
142 | * __iter_get_bvecs() may populate only part of the array -- zero it | |
143 | * out. | |
144 | */ | |
145 | bv = kvmalloc_array(npages, sizeof(*bv), GFP_KERNEL | __GFP_ZERO); | |
146 | if (!bv) | |
147 | return -ENOMEM; | |
b5b98989 | 148 | |
fc218544 ID |
149 | bytes = __iter_get_bvecs(iter, maxsize, bv); |
150 | if (bytes < 0) { | |
151 | /* | |
152 | * No pages were pinned -- just free the array. | |
153 | */ | |
154 | kvfree(bv); | |
155 | return bytes; | |
b5b98989 ZC |
156 | } |
157 | ||
fc218544 ID |
158 | *bvecs = bv; |
159 | *num_bvecs = npages; | |
160 | return bytes; | |
161 | } | |
162 | ||
163 | static void put_bvecs(struct bio_vec *bvecs, int num_bvecs, bool should_dirty) | |
164 | { | |
165 | int i; | |
166 | ||
167 | for (i = 0; i < num_bvecs; i++) { | |
168 | if (bvecs[i].bv_page) { | |
169 | if (should_dirty) | |
170 | set_page_dirty_lock(bvecs[i].bv_page); | |
171 | put_page(bvecs[i].bv_page); | |
172 | } | |
173 | } | |
174 | kvfree(bvecs); | |
b5b98989 | 175 | } |
124e68e7 SW |
176 | |
177 | /* | |
178 | * Prepare an open request. Preallocate ceph_cap to avoid an | |
179 | * inopportune ENOMEM later. | |
180 | */ | |
181 | static struct ceph_mds_request * | |
182 | prepare_open_request(struct super_block *sb, int flags, int create_mode) | |
183 | { | |
2678da88 | 184 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb); |
124e68e7 SW |
185 | struct ceph_mds_request *req; |
186 | int want_auth = USE_ANY_MDS; | |
187 | int op = (flags & O_CREAT) ? CEPH_MDS_OP_CREATE : CEPH_MDS_OP_OPEN; | |
188 | ||
189 | if (flags & (O_WRONLY|O_RDWR|O_CREAT|O_TRUNC)) | |
190 | want_auth = USE_AUTH_MDS; | |
191 | ||
192 | req = ceph_mdsc_create_request(mdsc, op, want_auth); | |
193 | if (IS_ERR(req)) | |
194 | goto out; | |
195 | req->r_fmode = ceph_flags_to_mode(flags); | |
f775ff7d | 196 | req->r_args.open.flags = ceph_flags_sys2wire(flags); |
124e68e7 | 197 | req->r_args.open.mode = cpu_to_le32(create_mode); |
124e68e7 SW |
198 | out: |
199 | return req; | |
200 | } | |
201 | ||
bb48bd4d CX |
202 | static int ceph_init_file_info(struct inode *inode, struct file *file, |
203 | int fmode, bool isdir) | |
204 | { | |
f4b97866 | 205 | struct ceph_inode_info *ci = ceph_inode(inode); |
94cc0877 | 206 | struct ceph_mount_options *opt = |
874c8ca1 | 207 | ceph_inode_to_client(&ci->netfs.inode)->mount_options; |
bb48bd4d | 208 | struct ceph_file_info *fi; |
083db6fd | 209 | int ret; |
bb48bd4d CX |
210 | |
211 | dout("%s %p %p 0%o (%s)\n", __func__, inode, file, | |
212 | inode->i_mode, isdir ? "dir" : "regular"); | |
213 | BUG_ON(inode->i_fop->release != ceph_release); | |
214 | ||
215 | if (isdir) { | |
216 | struct ceph_dir_file_info *dfi = | |
217 | kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL); | |
135e671e | 218 | if (!dfi) |
bb48bd4d | 219 | return -ENOMEM; |
bb48bd4d CX |
220 | |
221 | file->private_data = dfi; | |
222 | fi = &dfi->file_info; | |
223 | dfi->next_offset = 2; | |
224 | dfi->readdir_cache_idx = -1; | |
225 | } else { | |
226 | fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL); | |
135e671e | 227 | if (!fi) |
bb48bd4d | 228 | return -ENOMEM; |
bb48bd4d | 229 | |
94cc0877 JL |
230 | if (opt->flags & CEPH_MOUNT_OPT_NOPAGECACHE) |
231 | fi->flags |= CEPH_F_SYNC; | |
232 | ||
bb48bd4d CX |
233 | file->private_data = fi; |
234 | } | |
235 | ||
135e671e | 236 | ceph_get_fmode(ci, fmode, 1); |
bb48bd4d | 237 | fi->fmode = fmode; |
135e671e | 238 | |
bb48bd4d CX |
239 | spin_lock_init(&fi->rw_contexts_lock); |
240 | INIT_LIST_HEAD(&fi->rw_contexts); | |
81f148a9 | 241 | fi->filp_gen = READ_ONCE(ceph_inode_to_client(inode)->filp_gen); |
bb48bd4d | 242 | |
48490776 | 243 | if ((file->f_mode & FMODE_WRITE) && ceph_has_inline_data(ci)) { |
083db6fd DH |
244 | ret = ceph_uninline_data(file); |
245 | if (ret < 0) | |
246 | goto error; | |
247 | } | |
248 | ||
bb48bd4d | 249 | return 0; |
083db6fd DH |
250 | |
251 | error: | |
252 | ceph_fscache_unuse_cookie(inode, file->f_mode & FMODE_WRITE); | |
253 | ceph_put_fmode(ci, fi->fmode, 1); | |
254 | kmem_cache_free(ceph_file_cachep, fi); | |
255 | /* wake up anyone waiting for caps on this inode */ | |
256 | wake_up_all(&ci->i_cap_wq); | |
257 | return ret; | |
bb48bd4d CX |
258 | } |
259 | ||
124e68e7 SW |
260 | /* |
261 | * initialize private struct file data. | |
262 | * if we fail, clean up by dropping fmode reference on the ceph_inode | |
263 | */ | |
264 | static int ceph_init_file(struct inode *inode, struct file *file, int fmode) | |
265 | { | |
124e68e7 SW |
266 | int ret = 0; |
267 | ||
268 | switch (inode->i_mode & S_IFMT) { | |
269 | case S_IFREG: | |
400e1286 | 270 | ceph_fscache_use_cookie(inode, file->f_mode & FMODE_WRITE); |
df561f66 | 271 | fallthrough; |
124e68e7 | 272 | case S_IFDIR: |
bb48bd4d CX |
273 | ret = ceph_init_file_info(inode, file, fmode, |
274 | S_ISDIR(inode->i_mode)); | |
124e68e7 SW |
275 | break; |
276 | ||
277 | case S_IFLNK: | |
278 | dout("init_file %p %p 0%o (symlink)\n", inode, file, | |
279 | inode->i_mode); | |
124e68e7 SW |
280 | break; |
281 | ||
282 | default: | |
283 | dout("init_file %p %p 0%o (special)\n", inode, file, | |
284 | inode->i_mode); | |
285 | /* | |
286 | * we need to drop the open ref now, since we don't | |
287 | * have .release set to ceph_release. | |
288 | */ | |
124e68e7 SW |
289 | BUG_ON(inode->i_fop->release == ceph_release); |
290 | ||
291 | /* call the proper open fop */ | |
292 | ret = inode->i_fop->open(inode, file); | |
293 | } | |
294 | return ret; | |
295 | } | |
296 | ||
77310320 YZ |
297 | /* |
298 | * try renew caps after session gets killed. | |
299 | */ | |
719a2514 | 300 | int ceph_renew_caps(struct inode *inode, int fmode) |
77310320 | 301 | { |
2678da88 | 302 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); |
77310320 YZ |
303 | struct ceph_inode_info *ci = ceph_inode(inode); |
304 | struct ceph_mds_request *req; | |
305 | int err, flags, wanted; | |
306 | ||
307 | spin_lock(&ci->i_ceph_lock); | |
719a2514 | 308 | __ceph_touch_fmode(ci, mdsc, fmode); |
77310320 YZ |
309 | wanted = __ceph_caps_file_wanted(ci); |
310 | if (__ceph_is_any_real_caps(ci) && | |
8242c9f3 | 311 | (!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) { |
77310320 YZ |
312 | int issued = __ceph_caps_issued(ci, NULL); |
313 | spin_unlock(&ci->i_ceph_lock); | |
314 | dout("renew caps %p want %s issued %s updating mds_wanted\n", | |
315 | inode, ceph_cap_string(wanted), ceph_cap_string(issued)); | |
316 | ceph_check_caps(ci, 0, NULL); | |
317 | return 0; | |
318 | } | |
319 | spin_unlock(&ci->i_ceph_lock); | |
320 | ||
321 | flags = 0; | |
322 | if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR)) | |
323 | flags = O_RDWR; | |
324 | else if (wanted & CEPH_CAP_FILE_RD) | |
325 | flags = O_RDONLY; | |
326 | else if (wanted & CEPH_CAP_FILE_WR) | |
327 | flags = O_WRONLY; | |
328 | #ifdef O_LAZY | |
329 | if (wanted & CEPH_CAP_FILE_LAZYIO) | |
330 | flags |= O_LAZY; | |
331 | #endif | |
332 | ||
333 | req = prepare_open_request(inode->i_sb, flags, 0); | |
334 | if (IS_ERR(req)) { | |
335 | err = PTR_ERR(req); | |
336 | goto out; | |
337 | } | |
338 | ||
339 | req->r_inode = inode; | |
340 | ihold(inode); | |
341 | req->r_num_caps = 1; | |
77310320 YZ |
342 | |
343 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
344 | ceph_mdsc_put_request(req); | |
345 | out: | |
346 | dout("renew caps %p open result=%d\n", inode, err); | |
347 | return err < 0 ? err : 0; | |
348 | } | |
349 | ||
124e68e7 | 350 | /* |
124e68e7 SW |
351 | * If we already have the requisite capabilities, we can satisfy |
352 | * the open request locally (no need to request new caps from the | |
353 | * MDS). We do, however, need to inform the MDS (asynchronously) | |
354 | * if our wanted caps set expands. | |
355 | */ | |
356 | int ceph_open(struct inode *inode, struct file *file) | |
357 | { | |
358 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3d14c5d2 YS |
359 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
360 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
124e68e7 | 361 | struct ceph_mds_request *req; |
73737682 | 362 | struct ceph_file_info *fi = file->private_data; |
124e68e7 SW |
363 | int err; |
364 | int flags, fmode, wanted; | |
365 | ||
73737682 | 366 | if (fi) { |
124e68e7 SW |
367 | dout("open file %p is already opened\n", file); |
368 | return 0; | |
369 | } | |
370 | ||
371 | /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */ | |
372 | flags = file->f_flags & ~(O_CREAT|O_EXCL); | |
373 | if (S_ISDIR(inode->i_mode)) | |
374 | flags = O_DIRECTORY; /* mds likes to know */ | |
375 | ||
376 | dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode, | |
377 | ceph_vinop(inode), file, flags, file->f_flags); | |
378 | fmode = ceph_flags_to_mode(flags); | |
379 | wanted = ceph_caps_for_mode(fmode); | |
380 | ||
381 | /* snapped files are read-only */ | |
382 | if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE)) | |
383 | return -EROFS; | |
384 | ||
385 | /* trivially open snapdir */ | |
386 | if (ceph_snap(inode) == CEPH_SNAPDIR) { | |
124e68e7 SW |
387 | return ceph_init_file(inode, file, fmode); |
388 | } | |
389 | ||
390 | /* | |
7421ab80 SW |
391 | * No need to block if we have caps on the auth MDS (for |
392 | * write) or any MDS (for read). Update wanted set | |
124e68e7 SW |
393 | * asynchronously. |
394 | */ | |
be655596 | 395 | spin_lock(&ci->i_ceph_lock); |
7421ab80 SW |
396 | if (__ceph_is_any_real_caps(ci) && |
397 | (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) { | |
c1944fed | 398 | int mds_wanted = __ceph_caps_mds_wanted(ci, true); |
124e68e7 SW |
399 | int issued = __ceph_caps_issued(ci, NULL); |
400 | ||
401 | dout("open %p fmode %d want %s issued %s using existing\n", | |
402 | inode, fmode, ceph_cap_string(wanted), | |
403 | ceph_cap_string(issued)); | |
135e671e | 404 | __ceph_touch_fmode(ci, mdsc, fmode); |
be655596 | 405 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
406 | |
407 | /* adjust wanted? */ | |
408 | if ((issued & wanted) != wanted && | |
409 | (mds_wanted & wanted) != wanted && | |
410 | ceph_snap(inode) != CEPH_SNAPDIR) | |
411 | ceph_check_caps(ci, 0, NULL); | |
412 | ||
413 | return ceph_init_file(inode, file, fmode); | |
414 | } else if (ceph_snap(inode) != CEPH_NOSNAP && | |
415 | (ci->i_snap_caps & wanted) == wanted) { | |
719a2514 | 416 | __ceph_touch_fmode(ci, mdsc, fmode); |
be655596 | 417 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
418 | return ceph_init_file(inode, file, fmode); |
419 | } | |
99ccbd22 | 420 | |
be655596 | 421 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
422 | |
423 | dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted)); | |
424 | req = prepare_open_request(inode->i_sb, flags, 0); | |
425 | if (IS_ERR(req)) { | |
426 | err = PTR_ERR(req); | |
427 | goto out; | |
428 | } | |
70b666c3 SW |
429 | req->r_inode = inode; |
430 | ihold(inode); | |
99ccbd22 | 431 | |
124e68e7 | 432 | req->r_num_caps = 1; |
e36d571d | 433 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
124e68e7 SW |
434 | if (!err) |
435 | err = ceph_init_file(inode, file, req->r_fmode); | |
436 | ceph_mdsc_put_request(req); | |
437 | dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode)); | |
438 | out: | |
439 | return err; | |
440 | } | |
441 | ||
785892fe JL |
442 | /* Clone the layout from a synchronous create, if the dir now has Dc caps */ |
443 | static void | |
444 | cache_file_layout(struct inode *dst, struct inode *src) | |
445 | { | |
446 | struct ceph_inode_info *cdst = ceph_inode(dst); | |
447 | struct ceph_inode_info *csrc = ceph_inode(src); | |
448 | ||
449 | spin_lock(&cdst->i_ceph_lock); | |
450 | if ((__ceph_caps_issued(cdst, NULL) & CEPH_CAP_DIR_CREATE) && | |
451 | !ceph_file_layout_is_valid(&cdst->i_cached_layout)) { | |
452 | memcpy(&cdst->i_cached_layout, &csrc->i_layout, | |
453 | sizeof(cdst->i_cached_layout)); | |
454 | rcu_assign_pointer(cdst->i_cached_layout.pool_ns, | |
455 | ceph_try_get_string(csrc->i_layout.pool_ns)); | |
456 | } | |
457 | spin_unlock(&cdst->i_ceph_lock); | |
458 | } | |
124e68e7 | 459 | |
9a8d03ca JL |
460 | /* |
461 | * Try to set up an async create. We need caps, a file layout, and inode number, | |
462 | * and either a lease on the dentry or complete dir info. If any of those | |
463 | * criteria are not satisfied, then return false and the caller can go | |
464 | * synchronous. | |
465 | */ | |
466 | static int try_prep_async_create(struct inode *dir, struct dentry *dentry, | |
467 | struct ceph_file_layout *lo, u64 *pino) | |
468 | { | |
469 | struct ceph_inode_info *ci = ceph_inode(dir); | |
470 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
471 | int got = 0, want = CEPH_CAP_FILE_EXCL | CEPH_CAP_DIR_CREATE; | |
472 | u64 ino; | |
473 | ||
474 | spin_lock(&ci->i_ceph_lock); | |
475 | /* No auth cap means no chance for Dc caps */ | |
476 | if (!ci->i_auth_cap) | |
477 | goto no_async; | |
478 | ||
479 | /* Any delegated inos? */ | |
480 | if (xa_empty(&ci->i_auth_cap->session->s_delegated_inos)) | |
481 | goto no_async; | |
482 | ||
483 | if (!ceph_file_layout_is_valid(&ci->i_cached_layout)) | |
484 | goto no_async; | |
485 | ||
486 | if ((__ceph_caps_issued(ci, NULL) & want) != want) | |
487 | goto no_async; | |
488 | ||
489 | if (d_in_lookup(dentry)) { | |
490 | if (!__ceph_dir_is_complete(ci)) | |
491 | goto no_async; | |
3313f66a YZ |
492 | spin_lock(&dentry->d_lock); |
493 | di->lease_shared_gen = atomic_read(&ci->i_shared_gen); | |
494 | spin_unlock(&dentry->d_lock); | |
9a8d03ca JL |
495 | } else if (atomic_read(&ci->i_shared_gen) != |
496 | READ_ONCE(di->lease_shared_gen)) { | |
497 | goto no_async; | |
498 | } | |
499 | ||
500 | ino = ceph_get_deleg_ino(ci->i_auth_cap->session); | |
501 | if (!ino) | |
502 | goto no_async; | |
503 | ||
504 | *pino = ino; | |
505 | ceph_take_cap_refs(ci, want, false); | |
506 | memcpy(lo, &ci->i_cached_layout, sizeof(*lo)); | |
507 | rcu_assign_pointer(lo->pool_ns, | |
508 | ceph_try_get_string(ci->i_cached_layout.pool_ns)); | |
509 | got = want; | |
510 | no_async: | |
511 | spin_unlock(&ci->i_ceph_lock); | |
512 | return got; | |
513 | } | |
514 | ||
515 | static void restore_deleg_ino(struct inode *dir, u64 ino) | |
516 | { | |
517 | struct ceph_inode_info *ci = ceph_inode(dir); | |
518 | struct ceph_mds_session *s = NULL; | |
519 | ||
520 | spin_lock(&ci->i_ceph_lock); | |
521 | if (ci->i_auth_cap) | |
522 | s = ceph_get_mds_session(ci->i_auth_cap->session); | |
523 | spin_unlock(&ci->i_ceph_lock); | |
524 | if (s) { | |
525 | int err = ceph_restore_deleg_ino(s, ino); | |
526 | if (err) | |
527 | pr_warn("ceph: unable to restore delegated ino 0x%llx to session: %d\n", | |
528 | ino, err); | |
529 | ceph_put_mds_session(s); | |
530 | } | |
531 | } | |
532 | ||
4d9513cf JL |
533 | static void wake_async_create_waiters(struct inode *inode, |
534 | struct ceph_mds_session *session) | |
535 | { | |
536 | struct ceph_inode_info *ci = ceph_inode(inode); | |
537 | ||
538 | spin_lock(&ci->i_ceph_lock); | |
539 | if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE) { | |
540 | ci->i_ceph_flags &= ~CEPH_I_ASYNC_CREATE; | |
541 | wake_up_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT); | |
542 | } | |
543 | ceph_kick_flushing_inode_caps(session, ci); | |
544 | spin_unlock(&ci->i_ceph_lock); | |
545 | } | |
546 | ||
9a8d03ca JL |
547 | static void ceph_async_create_cb(struct ceph_mds_client *mdsc, |
548 | struct ceph_mds_request *req) | |
549 | { | |
4d9513cf JL |
550 | struct dentry *dentry = req->r_dentry; |
551 | struct inode *dinode = d_inode(dentry); | |
552 | struct inode *tinode = req->r_target_inode; | |
9a8d03ca JL |
553 | int result = req->r_err ? req->r_err : |
554 | le32_to_cpu(req->r_reply_info.head->result); | |
555 | ||
4d9513cf JL |
556 | WARN_ON_ONCE(dinode && tinode && dinode != tinode); |
557 | ||
558 | /* MDS changed -- caller must resubmit */ | |
9a8d03ca JL |
559 | if (result == -EJUKEBOX) |
560 | goto out; | |
561 | ||
562 | mapping_set_error(req->r_parent->i_mapping, result); | |
563 | ||
564 | if (result) { | |
2a575f13 JL |
565 | int pathlen = 0; |
566 | u64 base = 0; | |
9a8d03ca JL |
567 | char *path = ceph_mdsc_build_path(req->r_dentry, &pathlen, |
568 | &base, 0); | |
569 | ||
4868e537 | 570 | pr_warn("async create failure path=(%llx)%s result=%d!\n", |
4d9513cf JL |
571 | base, IS_ERR(path) ? "<<bad>>" : path, result); |
572 | ceph_mdsc_free_path(path, pathlen); | |
573 | ||
9a8d03ca JL |
574 | ceph_dir_clear_complete(req->r_parent); |
575 | if (!d_unhashed(dentry)) | |
576 | d_drop(dentry); | |
577 | ||
4d9513cf JL |
578 | if (dinode) { |
579 | mapping_set_error(dinode->i_mapping, result); | |
580 | ceph_inode_shutdown(dinode); | |
581 | wake_async_create_waiters(dinode, req->r_session); | |
582 | } | |
9a8d03ca JL |
583 | } |
584 | ||
4d9513cf JL |
585 | if (tinode) { |
586 | u64 ino = ceph_vino(tinode).ino; | |
9a8d03ca JL |
587 | |
588 | if (req->r_deleg_ino != ino) | |
589 | pr_warn("%s: inode number mismatch! err=%d deleg_ino=0x%llx target=0x%llx\n", | |
590 | __func__, req->r_err, req->r_deleg_ino, ino); | |
9a8d03ca | 591 | |
4d9513cf JL |
592 | mapping_set_error(tinode->i_mapping, result); |
593 | wake_async_create_waiters(tinode, req->r_session); | |
6407fbb9 | 594 | } else if (!result) { |
9a8d03ca JL |
595 | pr_warn("%s: no req->r_target_inode for 0x%llx\n", __func__, |
596 | req->r_deleg_ino); | |
597 | } | |
598 | out: | |
599 | ceph_mdsc_release_dir_caps(req); | |
600 | } | |
601 | ||
602 | static int ceph_finish_async_create(struct inode *dir, struct dentry *dentry, | |
603 | struct file *file, umode_t mode, | |
604 | struct ceph_mds_request *req, | |
605 | struct ceph_acl_sec_ctx *as_ctx, | |
606 | struct ceph_file_layout *lo) | |
607 | { | |
608 | int ret; | |
609 | char xattr_buf[4]; | |
610 | struct ceph_mds_reply_inode in = { }; | |
611 | struct ceph_mds_reply_info_in iinfo = { .in = &in }; | |
612 | struct ceph_inode_info *ci = ceph_inode(dir); | |
00061645 | 613 | struct ceph_dentry_info *di = ceph_dentry(dentry); |
9a8d03ca JL |
614 | struct inode *inode; |
615 | struct timespec64 now; | |
4584a768 | 616 | struct ceph_string *pool_ns; |
27171ae6 | 617 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(dir->i_sb); |
9a8d03ca JL |
618 | struct ceph_vino vino = { .ino = req->r_deleg_ino, |
619 | .snap = CEPH_NOSNAP }; | |
620 | ||
621 | ktime_get_real_ts64(&now); | |
622 | ||
623 | inode = ceph_get_inode(dentry->d_sb, vino); | |
624 | if (IS_ERR(inode)) | |
625 | return PTR_ERR(inode); | |
626 | ||
627 | iinfo.inline_version = CEPH_INLINE_NONE; | |
628 | iinfo.change_attr = 1; | |
629 | ceph_encode_timespec64(&iinfo.btime, &now); | |
630 | ||
620239d9 JL |
631 | if (req->r_pagelist) { |
632 | iinfo.xattr_len = req->r_pagelist->length; | |
633 | iinfo.xattr_data = req->r_pagelist->mapped_tail; | |
634 | } else { | |
635 | /* fake it */ | |
636 | iinfo.xattr_len = ARRAY_SIZE(xattr_buf); | |
637 | iinfo.xattr_data = xattr_buf; | |
638 | memset(iinfo.xattr_data, 0, iinfo.xattr_len); | |
639 | } | |
9a8d03ca JL |
640 | |
641 | in.ino = cpu_to_le64(vino.ino); | |
642 | in.snapid = cpu_to_le64(CEPH_NOSNAP); | |
643 | in.version = cpu_to_le64(1); // ??? | |
644 | in.cap.caps = in.cap.wanted = cpu_to_le32(CEPH_CAP_ALL_FILE); | |
645 | in.cap.cap_id = cpu_to_le64(1); | |
646 | in.cap.realm = cpu_to_le64(ci->i_snap_realm->ino); | |
647 | in.cap.flags = CEPH_CAP_FLAG_AUTH; | |
648 | in.ctime = in.mtime = in.atime = iinfo.btime; | |
9a8d03ca JL |
649 | in.truncate_seq = cpu_to_le32(1); |
650 | in.truncate_size = cpu_to_le64(-1ULL); | |
651 | in.xattr_version = cpu_to_le64(1); | |
652 | in.uid = cpu_to_le32(from_kuid(&init_user_ns, current_fsuid())); | |
fd84bfdd CB |
653 | if (dir->i_mode & S_ISGID) { |
654 | in.gid = cpu_to_le32(from_kgid(&init_user_ns, dir->i_gid)); | |
655 | ||
656 | /* Directories always inherit the setgid bit. */ | |
657 | if (S_ISDIR(mode)) | |
658 | mode |= S_ISGID; | |
fd84bfdd CB |
659 | } else { |
660 | in.gid = cpu_to_le32(from_kgid(&init_user_ns, current_fsgid())); | |
661 | } | |
662 | in.mode = cpu_to_le32((u32)mode); | |
663 | ||
9a8d03ca JL |
664 | in.nlink = cpu_to_le32(1); |
665 | in.max_size = cpu_to_le64(lo->stripe_unit); | |
666 | ||
667 | ceph_file_layout_to_legacy(lo, &in.layout); | |
4584a768 JL |
668 | /* lo is private, so pool_ns can't change */ |
669 | pool_ns = rcu_dereference_raw(lo->pool_ns); | |
670 | if (pool_ns) { | |
671 | iinfo.pool_ns_len = pool_ns->len; | |
672 | iinfo.pool_ns_data = pool_ns->str; | |
673 | } | |
9a8d03ca | 674 | |
27171ae6 | 675 | down_read(&mdsc->snap_rwsem); |
9a8d03ca JL |
676 | ret = ceph_fill_inode(inode, NULL, &iinfo, NULL, req->r_session, |
677 | req->r_fmode, NULL); | |
27171ae6 | 678 | up_read(&mdsc->snap_rwsem); |
9a8d03ca JL |
679 | if (ret) { |
680 | dout("%s failed to fill inode: %d\n", __func__, ret); | |
681 | ceph_dir_clear_complete(dir); | |
682 | if (!d_unhashed(dentry)) | |
683 | d_drop(dentry); | |
684 | if (inode->i_state & I_NEW) | |
685 | discard_new_inode(inode); | |
686 | } else { | |
687 | struct dentry *dn; | |
688 | ||
ebce3eb2 JL |
689 | dout("%s d_adding new inode 0x%llx to 0x%llx/%s\n", __func__, |
690 | vino.ino, ceph_ino(dir), dentry->d_name.name); | |
9a8d03ca JL |
691 | ceph_dir_clear_ordered(dir); |
692 | ceph_init_inode_acls(inode, as_ctx); | |
693 | if (inode->i_state & I_NEW) { | |
694 | /* | |
695 | * If it's not I_NEW, then someone created this before | |
696 | * we got here. Assume the server is aware of it at | |
697 | * that point and don't worry about setting | |
698 | * CEPH_I_ASYNC_CREATE. | |
699 | */ | |
700 | ceph_inode(inode)->i_ceph_flags = CEPH_I_ASYNC_CREATE; | |
701 | unlock_new_inode(inode); | |
702 | } | |
703 | if (d_in_lookup(dentry) || d_really_is_negative(dentry)) { | |
704 | if (!d_unhashed(dentry)) | |
705 | d_drop(dentry); | |
706 | dn = d_splice_alias(inode, dentry); | |
707 | WARN_ON_ONCE(dn && dn != dentry); | |
708 | } | |
709 | file->f_mode |= FMODE_CREATED; | |
710 | ret = finish_open(file, dentry, ceph_open); | |
711 | } | |
00061645 XL |
712 | |
713 | spin_lock(&dentry->d_lock); | |
714 | di->flags &= ~CEPH_DENTRY_ASYNC_CREATE; | |
715 | wake_up_bit(&di->flags, CEPH_DENTRY_ASYNC_CREATE_BIT); | |
716 | spin_unlock(&dentry->d_lock); | |
717 | ||
9a8d03ca JL |
718 | return ret; |
719 | } | |
720 | ||
124e68e7 | 721 | /* |
5ef50c3b SW |
722 | * Do a lookup + open with a single request. If we get a non-existent |
723 | * file or symlink, return 1 so the VFS can retry. | |
124e68e7 | 724 | */ |
5ef50c3b | 725 | int ceph_atomic_open(struct inode *dir, struct dentry *dentry, |
44907d79 | 726 | struct file *file, unsigned flags, umode_t mode) |
124e68e7 | 727 | { |
3d14c5d2 YS |
728 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
729 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
124e68e7 | 730 | struct ceph_mds_request *req; |
5ef50c3b | 731 | struct dentry *dn; |
5c31e92d | 732 | struct ceph_acl_sec_ctx as_ctx = {}; |
9a8d03ca | 733 | bool try_async = ceph_test_mount_opt(fsc, ASYNC_DIROPS); |
b7a29217 | 734 | int mask; |
124e68e7 | 735 | int err; |
124e68e7 | 736 | |
a455589f AV |
737 | dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n", |
738 | dir, dentry, dentry, | |
5ef50c3b SW |
739 | d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode); |
740 | ||
741 | if (dentry->d_name.len > NAME_MAX) | |
742 | return -ENAMETOOLONG; | |
743 | ||
4868e537 XL |
744 | err = ceph_wait_on_conflict_unlink(dentry); |
745 | if (err) | |
746 | return err; | |
7cb99947 HW |
747 | /* |
748 | * Do not truncate the file, since atomic_open is called before the | |
749 | * permission check. The caller will do the truncation afterward. | |
750 | */ | |
751 | flags &= ~O_TRUNC; | |
4868e537 | 752 | |
b1ee94aa | 753 | if (flags & O_CREAT) { |
b7a29217 LH |
754 | if (ceph_quota_is_max_files_exceeded(dir)) |
755 | return -EDQUOT; | |
5c31e92d | 756 | err = ceph_pre_init_acls(dir, &mode, &as_ctx); |
b1ee94aa YZ |
757 | if (err < 0) |
758 | return err; | |
ac6713cc YZ |
759 | err = ceph_security_init_secctx(dentry, mode, &as_ctx); |
760 | if (err < 0) | |
761 | goto out_ctx; | |
620239d9 JL |
762 | /* Async create can't handle more than a page of xattrs */ |
763 | if (as_ctx.pagelist && | |
764 | !list_is_singular(&as_ctx.pagelist->head)) | |
765 | try_async = false; | |
5bb5e6ee JL |
766 | } else if (!d_in_lookup(dentry)) { |
767 | /* If it's not being looked up, it's negative */ | |
768 | return -ENOENT; | |
b1ee94aa | 769 | } |
9a8d03ca | 770 | retry: |
124e68e7 SW |
771 | /* do the open */ |
772 | req = prepare_open_request(dir->i_sb, flags, mode); | |
b1ee94aa YZ |
773 | if (IS_ERR(req)) { |
774 | err = PTR_ERR(req); | |
5c31e92d | 775 | goto out_ctx; |
b1ee94aa | 776 | } |
124e68e7 SW |
777 | req->r_dentry = dget(dentry); |
778 | req->r_num_caps = 2; | |
9a8d03ca JL |
779 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; |
780 | if (ceph_security_xattr_wanted(dir)) | |
781 | mask |= CEPH_CAP_XATTR_SHARED; | |
782 | req->r_args.open.mask = cpu_to_le32(mask); | |
783 | req->r_parent = dir; | |
4c183472 | 784 | ihold(dir); |
9a8d03ca | 785 | |
124e68e7 | 786 | if (flags & O_CREAT) { |
9a8d03ca JL |
787 | struct ceph_file_layout lo; |
788 | ||
222b7f90 | 789 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL; |
124e68e7 | 790 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |
5c31e92d YZ |
791 | if (as_ctx.pagelist) { |
792 | req->r_pagelist = as_ctx.pagelist; | |
793 | as_ctx.pagelist = NULL; | |
b1ee94aa | 794 | } |
9a8d03ca JL |
795 | if (try_async && |
796 | (req->r_dir_caps = | |
797 | try_prep_async_create(dir, dentry, &lo, | |
798 | &req->r_deleg_ino))) { | |
00061645 XL |
799 | struct ceph_dentry_info *di = ceph_dentry(dentry); |
800 | ||
9a8d03ca JL |
801 | set_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags); |
802 | req->r_args.open.flags |= cpu_to_le32(CEPH_O_EXCL); | |
803 | req->r_callback = ceph_async_create_cb; | |
00061645 XL |
804 | |
805 | spin_lock(&dentry->d_lock); | |
806 | di->flags |= CEPH_DENTRY_ASYNC_CREATE; | |
807 | spin_unlock(&dentry->d_lock); | |
808 | ||
9a8d03ca JL |
809 | err = ceph_mdsc_submit_request(mdsc, dir, req); |
810 | if (!err) { | |
811 | err = ceph_finish_async_create(dir, dentry, | |
812 | file, mode, req, | |
813 | &as_ctx, &lo); | |
814 | } else if (err == -EJUKEBOX) { | |
815 | restore_deleg_ino(dir, req->r_deleg_ino); | |
816 | ceph_mdsc_put_request(req); | |
817 | try_async = false; | |
932a9b58 | 818 | ceph_put_string(rcu_dereference_raw(lo.pool_ns)); |
9a8d03ca JL |
819 | goto retry; |
820 | } | |
932a9b58 | 821 | ceph_put_string(rcu_dereference_raw(lo.pool_ns)); |
9a8d03ca JL |
822 | goto out_req; |
823 | } | |
124e68e7 | 824 | } |
315f2408 | 825 | |
3dd69aab | 826 | set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); |
7cb99947 | 827 | err = ceph_mdsc_do_request(mdsc, (flags & O_CREAT) ? dir : NULL, req); |
7a971e2c JL |
828 | if (err == -ENOENT) { |
829 | dentry = ceph_handle_snapdir(req, dentry); | |
830 | if (IS_ERR(dentry)) { | |
831 | err = PTR_ERR(dentry); | |
832 | goto out_req; | |
833 | } | |
834 | err = 0; | |
aa60cfc3 | 835 | } |
79aec984 | 836 | |
7a971e2c | 837 | if (!err && (flags & O_CREAT) && !req->r_reply_info.head->is_dentry) |
124e68e7 | 838 | err = ceph_handle_notrace_create(dir, dentry); |
2d83bde9 | 839 | |
00699ad8 | 840 | if (d_in_lookup(dentry)) { |
5ef50c3b SW |
841 | dn = ceph_finish_lookup(req, dentry, err); |
842 | if (IS_ERR(dn)) | |
843 | err = PTR_ERR(dn); | |
844 | } else { | |
845 | /* we were given a hashed negative dentry */ | |
846 | dn = NULL; | |
847 | } | |
848 | if (err) | |
b1ee94aa | 849 | goto out_req; |
2b0143b5 | 850 | if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) { |
5ef50c3b SW |
851 | /* make vfs retry on splice, ENOENT, or symlink */ |
852 | dout("atomic_open finish_no_open on dn %p\n", dn); | |
853 | err = finish_no_open(file, dn); | |
854 | } else { | |
855 | dout("atomic_open finish_open on dn %p\n", dn); | |
6e8575fa | 856 | if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) { |
785892fe JL |
857 | struct inode *newino = d_inode(dentry); |
858 | ||
859 | cache_file_layout(dir, newino); | |
860 | ceph_init_inode_acls(newino, &as_ctx); | |
73a09dd9 | 861 | file->f_mode |= FMODE_CREATED; |
6e8575fa | 862 | } |
be12af3e | 863 | err = finish_open(file, dentry, ceph_open); |
5ef50c3b | 864 | } |
b1ee94aa | 865 | out_req: |
5ef50c3b | 866 | ceph_mdsc_put_request(req); |
5c31e92d YZ |
867 | out_ctx: |
868 | ceph_release_acl_sec_ctx(&as_ctx); | |
5ef50c3b | 869 | dout("atomic_open result=%d\n", err); |
d9585277 | 870 | return err; |
124e68e7 SW |
871 | } |
872 | ||
873 | int ceph_release(struct inode *inode, struct file *file) | |
874 | { | |
875 | struct ceph_inode_info *ci = ceph_inode(inode); | |
124e68e7 | 876 | |
bb48bd4d CX |
877 | if (S_ISDIR(inode->i_mode)) { |
878 | struct ceph_dir_file_info *dfi = file->private_data; | |
879 | dout("release inode %p dir file %p\n", inode, file); | |
880 | WARN_ON(!list_empty(&dfi->file_info.rw_contexts)); | |
881 | ||
719a2514 | 882 | ceph_put_fmode(ci, dfi->file_info.fmode, 1); |
bb48bd4d CX |
883 | |
884 | if (dfi->last_readdir) | |
885 | ceph_mdsc_put_request(dfi->last_readdir); | |
886 | kfree(dfi->last_name); | |
887 | kfree(dfi->dir_info); | |
888 | kmem_cache_free(ceph_dir_file_cachep, dfi); | |
889 | } else { | |
890 | struct ceph_file_info *fi = file->private_data; | |
891 | dout("release inode %p regular file %p\n", inode, file); | |
892 | WARN_ON(!list_empty(&fi->rw_contexts)); | |
893 | ||
400e1286 | 894 | ceph_fscache_unuse_cookie(inode, file->f_mode & FMODE_WRITE); |
719a2514 YZ |
895 | ceph_put_fmode(ci, fi->fmode, 1); |
896 | ||
bb48bd4d CX |
897 | kmem_cache_free(ceph_file_cachep, fi); |
898 | } | |
195d3ce2 SW |
899 | |
900 | /* wake up anyone waiting for caps on this inode */ | |
03066f23 | 901 | wake_up_all(&ci->i_cap_wq); |
124e68e7 SW |
902 | return 0; |
903 | } | |
904 | ||
83701246 | 905 | enum { |
c8fe9b17 YZ |
906 | HAVE_RETRIED = 1, |
907 | CHECK_EOF = 2, | |
908 | READ_INLINE = 3, | |
83701246 YZ |
909 | }; |
910 | ||
124e68e7 SW |
911 | /* |
912 | * Completely synchronous read and write methods. Direct from __user | |
913 | * buffer to osd, or directly to user pages (if O_DIRECT). | |
914 | * | |
fce7a974 YZ |
915 | * If the read spans object boundary, just do multiple reads. (That's not |
916 | * atomic, but good enough for now.) | |
917 | * | |
918 | * If we get a short result from the OSD, check against i_size; we need to | |
919 | * only return a short read to the caller if we hit EOF. | |
124e68e7 | 920 | */ |
7ce469a5 | 921 | static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to, |
fce7a974 | 922 | int *retry_op) |
124e68e7 | 923 | { |
8eb4efb0 | 924 | struct file *file = iocb->ki_filp; |
496ad9aa | 925 | struct inode *inode = file_inode(file); |
fce7a974 YZ |
926 | struct ceph_inode_info *ci = ceph_inode(inode); |
927 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
928 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
7ce469a5 | 929 | ssize_t ret; |
fce7a974 YZ |
930 | u64 off = iocb->ki_pos; |
931 | u64 len = iov_iter_count(to); | |
e485d028 | 932 | u64 i_size = i_size_read(inode); |
124e68e7 | 933 | |
1c0a9c2d | 934 | dout("sync_read on file %p %llu~%u %s\n", file, off, (unsigned)len, |
124e68e7 | 935 | (file->f_flags & O_DIRECT) ? "O_DIRECT" : ""); |
d0d0db22 YZ |
936 | |
937 | if (!len) | |
938 | return 0; | |
e98b6fed SW |
939 | /* |
940 | * flush any page cache pages in this range. this | |
941 | * will make concurrent normal and sync io slow, | |
942 | * but it will at least behave sensibly when they are | |
943 | * in sequence. | |
944 | */ | |
e450f4d1 | 945 | ret = filemap_write_and_wait_range(inode->i_mapping, |
946 | off, off + len - 1); | |
29065a51 | 947 | if (ret < 0) |
8eb4efb0 | 948 | return ret; |
29065a51 | 949 | |
fce7a974 YZ |
950 | ret = 0; |
951 | while ((len = iov_iter_count(to)) > 0) { | |
952 | struct ceph_osd_request *req; | |
953 | struct page **pages; | |
954 | int num_pages; | |
7ce469a5 | 955 | size_t page_off; |
fce7a974 | 956 | bool more; |
c5f575ed JL |
957 | int idx; |
958 | size_t left; | |
fce7a974 YZ |
959 | |
960 | req = ceph_osdc_new_request(osdc, &ci->i_layout, | |
961 | ci->i_vino, off, &len, 0, 1, | |
962 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
963 | NULL, ci->i_truncate_seq, | |
964 | ci->i_truncate_size, false); | |
965 | if (IS_ERR(req)) { | |
966 | ret = PTR_ERR(req); | |
967 | break; | |
968 | } | |
7ce469a5 | 969 | |
fce7a974 YZ |
970 | more = len < iov_iter_count(to); |
971 | ||
c5f575ed JL |
972 | num_pages = calc_pages_for(off, len); |
973 | page_off = off & ~PAGE_MASK; | |
974 | pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); | |
975 | if (IS_ERR(pages)) { | |
976 | ceph_osdc_put_request(req); | |
977 | ret = PTR_ERR(pages); | |
978 | break; | |
7ce469a5 | 979 | } |
fce7a974 YZ |
980 | |
981 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_off, | |
982 | false, false); | |
a8af0d68 JL |
983 | ceph_osdc_start_request(osdc, req); |
984 | ret = ceph_osdc_wait_request(osdc, req); | |
97e27aaa | 985 | |
8ae99ae2 | 986 | ceph_update_read_metrics(&fsc->mdsc->metric, |
97e27aaa XL |
987 | req->r_start_latency, |
988 | req->r_end_latency, | |
903f4fec | 989 | len, ret); |
97e27aaa | 990 | |
fce7a974 YZ |
991 | ceph_osdc_put_request(req); |
992 | ||
993 | i_size = i_size_read(inode); | |
994 | dout("sync_read %llu~%llu got %zd i_size %llu%s\n", | |
995 | off, len, ret, i_size, (more ? " MORE" : "")); | |
996 | ||
997 | if (ret == -ENOENT) | |
998 | ret = 0; | |
999 | if (ret >= 0 && ret < len && (off + ret < i_size)) { | |
1000 | int zlen = min(len - ret, i_size - off - ret); | |
1001 | int zoff = page_off + ret; | |
1002 | dout("sync_read zero gap %llu~%llu\n", | |
1003 | off + ret, off + ret + zlen); | |
1004 | ceph_zero_page_vector_range(zoff, zlen, pages); | |
1005 | ret += zlen; | |
1006 | } | |
1007 | ||
c5f575ed JL |
1008 | idx = 0; |
1009 | left = ret > 0 ? ret : 0; | |
1010 | while (left > 0) { | |
1011 | size_t len, copied; | |
1012 | page_off = off & ~PAGE_MASK; | |
1013 | len = min_t(size_t, left, PAGE_SIZE - page_off); | |
1014 | SetPageUptodate(pages[idx]); | |
1015 | copied = copy_page_to_iter(pages[idx++], | |
1016 | page_off, len, to); | |
1017 | off += copied; | |
1018 | left -= copied; | |
1019 | if (copied < len) { | |
1020 | ret = -EFAULT; | |
1021 | break; | |
7ce469a5 | 1022 | } |
8eb4efb0 | 1023 | } |
c5f575ed | 1024 | ceph_release_page_vector(pages, num_pages); |
fce7a974 | 1025 | |
131d7eb4 | 1026 | if (ret < 0) { |
0b98acd6 ID |
1027 | if (ret == -EBLOCKLISTED) |
1028 | fsc->blocklisted = true; | |
131d7eb4 YZ |
1029 | break; |
1030 | } | |
1031 | ||
1032 | if (off >= i_size || !more) | |
fce7a974 | 1033 | break; |
8eb4efb0 | 1034 | } |
124e68e7 | 1035 | |
8eb4efb0 | 1036 | if (off > iocb->ki_pos) { |
c3d8e0b5 | 1037 | if (off >= i_size) { |
fce7a974 | 1038 | *retry_op = CHECK_EOF; |
c3d8e0b5 XL |
1039 | ret = i_size - iocb->ki_pos; |
1040 | iocb->ki_pos = i_size; | |
1041 | } else { | |
1042 | ret = off - iocb->ki_pos; | |
1043 | iocb->ki_pos = off; | |
1044 | } | |
8eb4efb0 | 1045 | } |
124e68e7 | 1046 | |
fce7a974 | 1047 | dout("sync_read result %zd retry_op %d\n", ret, *retry_op); |
124e68e7 SW |
1048 | return ret; |
1049 | } | |
1050 | ||
c8fe9b17 YZ |
1051 | struct ceph_aio_request { |
1052 | struct kiocb *iocb; | |
1053 | size_t total_len; | |
85784f93 YZ |
1054 | bool write; |
1055 | bool should_dirty; | |
c8fe9b17 YZ |
1056 | int error; |
1057 | struct list_head osd_reqs; | |
1058 | unsigned num_reqs; | |
1059 | atomic_t pending_reqs; | |
fac02ddf | 1060 | struct timespec64 mtime; |
c8fe9b17 YZ |
1061 | struct ceph_cap_flush *prealloc_cf; |
1062 | }; | |
1063 | ||
5be0389d YZ |
1064 | struct ceph_aio_work { |
1065 | struct work_struct work; | |
1066 | struct ceph_osd_request *req; | |
1067 | }; | |
1068 | ||
1069 | static void ceph_aio_retry_work(struct work_struct *work); | |
1070 | ||
c8fe9b17 YZ |
1071 | static void ceph_aio_complete(struct inode *inode, |
1072 | struct ceph_aio_request *aio_req) | |
1073 | { | |
1074 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1075 | int ret; | |
1076 | ||
1077 | if (!atomic_dec_and_test(&aio_req->pending_reqs)) | |
1078 | return; | |
1079 | ||
6a81749e JL |
1080 | if (aio_req->iocb->ki_flags & IOCB_DIRECT) |
1081 | inode_dio_end(inode); | |
1082 | ||
c8fe9b17 YZ |
1083 | ret = aio_req->error; |
1084 | if (!ret) | |
1085 | ret = aio_req->total_len; | |
1086 | ||
1087 | dout("ceph_aio_complete %p rc %d\n", inode, ret); | |
1088 | ||
1089 | if (ret >= 0 && aio_req->write) { | |
1090 | int dirty; | |
1091 | ||
1092 | loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len; | |
1093 | if (endoff > i_size_read(inode)) { | |
1094 | if (ceph_inode_set_size(inode, endoff)) | |
1095 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
1096 | } | |
1097 | ||
1098 | spin_lock(&ci->i_ceph_lock); | |
c8fe9b17 YZ |
1099 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
1100 | &aio_req->prealloc_cf); | |
1101 | spin_unlock(&ci->i_ceph_lock); | |
1102 | if (dirty) | |
1103 | __mark_inode_dirty(inode, dirty); | |
1104 | ||
1105 | } | |
1106 | ||
1107 | ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR : | |
1108 | CEPH_CAP_FILE_RD)); | |
1109 | ||
6b19b766 | 1110 | aio_req->iocb->ki_complete(aio_req->iocb, ret); |
c8fe9b17 YZ |
1111 | |
1112 | ceph_free_cap_flush(aio_req->prealloc_cf); | |
1113 | kfree(aio_req); | |
1114 | } | |
1115 | ||
85e084fe | 1116 | static void ceph_aio_complete_req(struct ceph_osd_request *req) |
c8fe9b17 YZ |
1117 | { |
1118 | int rc = req->r_result; | |
1119 | struct inode *inode = req->r_inode; | |
1120 | struct ceph_aio_request *aio_req = req->r_priv; | |
1121 | struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0); | |
2678da88 | 1122 | struct ceph_client_metric *metric = &ceph_sb_to_mdsc(inode->i_sb)->metric; |
903f4fec | 1123 | unsigned int len = osd_data->bvec_pos.iter.bi_size; |
c8fe9b17 | 1124 | |
fc218544 ID |
1125 | BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_BVECS); |
1126 | BUG_ON(!osd_data->num_bvecs); | |
1127 | ||
903f4fec | 1128 | dout("ceph_aio_complete_req %p rc %d bytes %u\n", inode, rc, len); |
c8fe9b17 YZ |
1129 | |
1130 | if (rc == -EOLDSNAPC) { | |
5be0389d YZ |
1131 | struct ceph_aio_work *aio_work; |
1132 | BUG_ON(!aio_req->write); | |
1133 | ||
1134 | aio_work = kmalloc(sizeof(*aio_work), GFP_NOFS); | |
1135 | if (aio_work) { | |
1136 | INIT_WORK(&aio_work->work, ceph_aio_retry_work); | |
1137 | aio_work->req = req; | |
1cf89a8d | 1138 | queue_work(ceph_inode_to_client(inode)->inode_wq, |
5be0389d YZ |
1139 | &aio_work->work); |
1140 | return; | |
1141 | } | |
1142 | rc = -ENOMEM; | |
1143 | } else if (!aio_req->write) { | |
c8fe9b17 YZ |
1144 | if (rc == -ENOENT) |
1145 | rc = 0; | |
903f4fec | 1146 | if (rc >= 0 && len > rc) { |
fc218544 | 1147 | struct iov_iter i; |
903f4fec | 1148 | int zlen = len - rc; |
fc218544 | 1149 | |
c8fe9b17 YZ |
1150 | /* |
1151 | * If read is satisfied by single OSD request, | |
1152 | * it can pass EOF. Otherwise read is within | |
1153 | * i_size. | |
1154 | */ | |
1155 | if (aio_req->num_reqs == 1) { | |
1156 | loff_t i_size = i_size_read(inode); | |
1157 | loff_t endoff = aio_req->iocb->ki_pos + rc; | |
1158 | if (endoff < i_size) | |
1159 | zlen = min_t(size_t, zlen, | |
1160 | i_size - endoff); | |
1161 | aio_req->total_len = rc + zlen; | |
1162 | } | |
1163 | ||
aa563d7b | 1164 | iov_iter_bvec(&i, READ, osd_data->bvec_pos.bvecs, |
903f4fec | 1165 | osd_data->num_bvecs, len); |
fc218544 ID |
1166 | iov_iter_advance(&i, rc); |
1167 | iov_iter_zero(zlen, &i); | |
c8fe9b17 YZ |
1168 | } |
1169 | } | |
1170 | ||
fbd47ddc XL |
1171 | /* r_start_latency == 0 means the request was not submitted */ |
1172 | if (req->r_start_latency) { | |
1173 | if (aio_req->write) | |
1174 | ceph_update_write_metrics(metric, req->r_start_latency, | |
903f4fec | 1175 | req->r_end_latency, len, rc); |
fbd47ddc XL |
1176 | else |
1177 | ceph_update_read_metrics(metric, req->r_start_latency, | |
903f4fec | 1178 | req->r_end_latency, len, rc); |
fbd47ddc XL |
1179 | } |
1180 | ||
fc218544 ID |
1181 | put_bvecs(osd_data->bvec_pos.bvecs, osd_data->num_bvecs, |
1182 | aio_req->should_dirty); | |
c8fe9b17 YZ |
1183 | ceph_osdc_put_request(req); |
1184 | ||
1185 | if (rc < 0) | |
1186 | cmpxchg(&aio_req->error, 0, rc); | |
1187 | ||
1188 | ceph_aio_complete(inode, aio_req); | |
1189 | return; | |
1190 | } | |
1191 | ||
5be0389d YZ |
1192 | static void ceph_aio_retry_work(struct work_struct *work) |
1193 | { | |
1194 | struct ceph_aio_work *aio_work = | |
1195 | container_of(work, struct ceph_aio_work, work); | |
1196 | struct ceph_osd_request *orig_req = aio_work->req; | |
1197 | struct ceph_aio_request *aio_req = orig_req->r_priv; | |
1198 | struct inode *inode = orig_req->r_inode; | |
1199 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1200 | struct ceph_snap_context *snapc; | |
1201 | struct ceph_osd_request *req; | |
1202 | int ret; | |
1203 | ||
1204 | spin_lock(&ci->i_ceph_lock); | |
1205 | if (__ceph_have_pending_cap_snap(ci)) { | |
1206 | struct ceph_cap_snap *capsnap = | |
1207 | list_last_entry(&ci->i_cap_snaps, | |
1208 | struct ceph_cap_snap, | |
1209 | ci_item); | |
1210 | snapc = ceph_get_snap_context(capsnap->context); | |
1211 | } else { | |
1212 | BUG_ON(!ci->i_head_snapc); | |
1213 | snapc = ceph_get_snap_context(ci->i_head_snapc); | |
1214 | } | |
1215 | spin_unlock(&ci->i_ceph_lock); | |
1216 | ||
61d2f855 | 1217 | req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 1, |
5be0389d | 1218 | false, GFP_NOFS); |
1418bf07 DC |
1219 | if (!req) { |
1220 | ret = -ENOMEM; | |
5be0389d YZ |
1221 | req = orig_req; |
1222 | goto out; | |
1223 | } | |
1224 | ||
b178cf43 | 1225 | req->r_flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
63244fa1 | 1226 | ceph_oloc_copy(&req->r_base_oloc, &orig_req->r_base_oloc); |
d30291b9 | 1227 | ceph_oid_copy(&req->r_base_oid, &orig_req->r_base_oid); |
5be0389d | 1228 | |
26f887e0 ID |
1229 | req->r_ops[0] = orig_req->r_ops[0]; |
1230 | ||
1231 | req->r_mtime = aio_req->mtime; | |
1232 | req->r_data_offset = req->r_ops[0].extent.offset; | |
1233 | ||
13d1ad16 ID |
1234 | ret = ceph_osdc_alloc_messages(req, GFP_NOFS); |
1235 | if (ret) { | |
1236 | ceph_osdc_put_request(req); | |
1237 | req = orig_req; | |
1238 | goto out; | |
1239 | } | |
5be0389d | 1240 | |
5be0389d YZ |
1241 | ceph_osdc_put_request(orig_req); |
1242 | ||
1243 | req->r_callback = ceph_aio_complete_req; | |
1244 | req->r_inode = inode; | |
1245 | req->r_priv = aio_req; | |
1246 | ||
a8af0d68 | 1247 | ceph_osdc_start_request(req->r_osdc, req); |
5be0389d YZ |
1248 | out: |
1249 | if (ret < 0) { | |
5be0389d | 1250 | req->r_result = ret; |
85e084fe | 1251 | ceph_aio_complete_req(req); |
5be0389d YZ |
1252 | } |
1253 | ||
db6aed70 | 1254 | ceph_put_snap_context(snapc); |
5be0389d YZ |
1255 | kfree(aio_work); |
1256 | } | |
1257 | ||
e8344e66 | 1258 | static ssize_t |
c8fe9b17 YZ |
1259 | ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter, |
1260 | struct ceph_snap_context *snapc, | |
1261 | struct ceph_cap_flush **pcf) | |
124e68e7 | 1262 | { |
e8344e66 | 1263 | struct file *file = iocb->ki_filp; |
496ad9aa | 1264 | struct inode *inode = file_inode(file); |
124e68e7 | 1265 | struct ceph_inode_info *ci = ceph_inode(inode); |
3d14c5d2 | 1266 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
97e27aaa | 1267 | struct ceph_client_metric *metric = &fsc->mdsc->metric; |
acead002 | 1268 | struct ceph_vino vino; |
124e68e7 | 1269 | struct ceph_osd_request *req; |
fc218544 | 1270 | struct bio_vec *bvecs; |
c8fe9b17 YZ |
1271 | struct ceph_aio_request *aio_req = NULL; |
1272 | int num_pages = 0; | |
124e68e7 | 1273 | int flags; |
321fe13c | 1274 | int ret = 0; |
fac02ddf | 1275 | struct timespec64 mtime = current_time(inode); |
c8fe9b17 YZ |
1276 | size_t count = iov_iter_count(iter); |
1277 | loff_t pos = iocb->ki_pos; | |
1278 | bool write = iov_iter_rw(iter) == WRITE; | |
fcb14cb1 | 1279 | bool should_dirty = !write && user_backed_iter(iter); |
124e68e7 | 1280 | |
c8fe9b17 | 1281 | if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP) |
124e68e7 SW |
1282 | return -EROFS; |
1283 | ||
1c0a9c2d YZ |
1284 | dout("sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n", |
1285 | (write ? "write" : "read"), file, pos, (unsigned)count, | |
40e7e2c0 | 1286 | snapc, snapc ? snapc->seq : 0); |
124e68e7 | 1287 | |
c8fe9b17 | 1288 | if (write) { |
400e1286 JL |
1289 | int ret2; |
1290 | ||
1291 | ceph_fscache_invalidate(inode, true); | |
1292 | ||
1293 | ret2 = invalidate_inode_pages2_range(inode->i_mapping, | |
09cbfeaf | 1294 | pos >> PAGE_SHIFT, |
e450f4d1 | 1295 | (pos + count - 1) >> PAGE_SHIFT); |
5d7eb1a3 | 1296 | if (ret2 < 0) |
a380a031 | 1297 | dout("invalidate_inode_pages2_range returned %d\n", ret2); |
29065a51 | 1298 | |
b178cf43 | 1299 | flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
c8fe9b17 YZ |
1300 | } else { |
1301 | flags = CEPH_OSD_FLAG_READ; | |
1302 | } | |
124e68e7 | 1303 | |
c8fe9b17 | 1304 | while (iov_iter_count(iter) > 0) { |
fc218544 | 1305 | u64 size = iov_iter_count(iter); |
c8fe9b17 | 1306 | ssize_t len; |
e8344e66 | 1307 | |
3a15b38f ID |
1308 | if (write) |
1309 | size = min_t(u64, size, fsc->mount_options->wsize); | |
1310 | else | |
1311 | size = min_t(u64, size, fsc->mount_options->rsize); | |
1312 | ||
e8344e66 | 1313 | vino = ceph_vino(inode); |
1314 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
c8fe9b17 | 1315 | vino, pos, &size, 0, |
3fb99d48 | 1316 | 1, |
c8fe9b17 YZ |
1317 | write ? CEPH_OSD_OP_WRITE : |
1318 | CEPH_OSD_OP_READ, | |
1319 | flags, snapc, | |
e8344e66 | 1320 | ci->i_truncate_seq, |
1321 | ci->i_truncate_size, | |
1322 | false); | |
1323 | if (IS_ERR(req)) { | |
1324 | ret = PTR_ERR(req); | |
eab87235 | 1325 | break; |
e8344e66 | 1326 | } |
124e68e7 | 1327 | |
fc218544 ID |
1328 | len = iter_get_bvecs_alloc(iter, size, &bvecs, &num_pages); |
1329 | if (len < 0) { | |
64c31311 | 1330 | ceph_osdc_put_request(req); |
fc218544 | 1331 | ret = len; |
64c31311 | 1332 | break; |
124e68e7 | 1333 | } |
fc218544 ID |
1334 | if (len != size) |
1335 | osd_req_op_extent_update(req, 0, len); | |
124e68e7 SW |
1336 | |
1337 | /* | |
c8fe9b17 YZ |
1338 | * To simplify error handling, allow AIO when IO within i_size |
1339 | * or IO can be satisfied by single OSD request. | |
124e68e7 | 1340 | */ |
c8fe9b17 YZ |
1341 | if (pos == iocb->ki_pos && !is_sync_kiocb(iocb) && |
1342 | (len == count || pos + count <= i_size_read(inode))) { | |
1343 | aio_req = kzalloc(sizeof(*aio_req), GFP_KERNEL); | |
1344 | if (aio_req) { | |
1345 | aio_req->iocb = iocb; | |
1346 | aio_req->write = write; | |
85784f93 | 1347 | aio_req->should_dirty = should_dirty; |
c8fe9b17 YZ |
1348 | INIT_LIST_HEAD(&aio_req->osd_reqs); |
1349 | if (write) { | |
5be0389d | 1350 | aio_req->mtime = mtime; |
c8fe9b17 YZ |
1351 | swap(aio_req->prealloc_cf, *pcf); |
1352 | } | |
1353 | } | |
1354 | /* ignore error */ | |
1355 | } | |
1356 | ||
1357 | if (write) { | |
1358 | /* | |
1359 | * throw out any page cache pages in this range. this | |
1360 | * may block. | |
1361 | */ | |
1362 | truncate_inode_pages_range(inode->i_mapping, pos, | |
d31d07b9 | 1363 | PAGE_ALIGN(pos + len) - 1); |
c8fe9b17 | 1364 | |
bb873b53 | 1365 | req->r_mtime = mtime; |
c8fe9b17 YZ |
1366 | } |
1367 | ||
fc218544 | 1368 | osd_req_op_extent_osd_data_bvecs(req, 0, bvecs, num_pages, len); |
e8344e66 | 1369 | |
c8fe9b17 YZ |
1370 | if (aio_req) { |
1371 | aio_req->total_len += len; | |
1372 | aio_req->num_reqs++; | |
1373 | atomic_inc(&aio_req->pending_reqs); | |
1374 | ||
1375 | req->r_callback = ceph_aio_complete_req; | |
1376 | req->r_inode = inode; | |
1377 | req->r_priv = aio_req; | |
94e85771 | 1378 | list_add_tail(&req->r_private_item, &aio_req->osd_reqs); |
c8fe9b17 YZ |
1379 | |
1380 | pos += len; | |
c8fe9b17 YZ |
1381 | continue; |
1382 | } | |
1383 | ||
a8af0d68 JL |
1384 | ceph_osdc_start_request(req->r_osdc, req); |
1385 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
e8344e66 | 1386 | |
97e27aaa | 1387 | if (write) |
8ae99ae2 | 1388 | ceph_update_write_metrics(metric, req->r_start_latency, |
903f4fec | 1389 | req->r_end_latency, len, ret); |
97e27aaa | 1390 | else |
8ae99ae2 | 1391 | ceph_update_read_metrics(metric, req->r_start_latency, |
903f4fec | 1392 | req->r_end_latency, len, ret); |
97e27aaa | 1393 | |
c8fe9b17 YZ |
1394 | size = i_size_read(inode); |
1395 | if (!write) { | |
1396 | if (ret == -ENOENT) | |
1397 | ret = 0; | |
1398 | if (ret >= 0 && ret < len && pos + ret < size) { | |
fc218544 | 1399 | struct iov_iter i; |
c8fe9b17 YZ |
1400 | int zlen = min_t(size_t, len - ret, |
1401 | size - pos - ret); | |
fc218544 | 1402 | |
aa563d7b | 1403 | iov_iter_bvec(&i, READ, bvecs, num_pages, len); |
fc218544 ID |
1404 | iov_iter_advance(&i, ret); |
1405 | iov_iter_zero(zlen, &i); | |
c8fe9b17 YZ |
1406 | ret += zlen; |
1407 | } | |
1408 | if (ret >= 0) | |
1409 | len = ret; | |
1410 | } | |
1411 | ||
fc218544 | 1412 | put_bvecs(bvecs, num_pages, should_dirty); |
e8344e66 | 1413 | ceph_osdc_put_request(req); |
c8fe9b17 | 1414 | if (ret < 0) |
e8344e66 | 1415 | break; |
64c31311 | 1416 | |
c8fe9b17 | 1417 | pos += len; |
c8fe9b17 | 1418 | if (!write && pos >= size) |
e8344e66 | 1419 | break; |
64c31311 | 1420 | |
c8fe9b17 YZ |
1421 | if (write && pos > size) { |
1422 | if (ceph_inode_set_size(inode, pos)) | |
64c31311 AV |
1423 | ceph_check_caps(ceph_inode(inode), |
1424 | CHECK_CAPS_AUTHONLY, | |
1425 | NULL); | |
1426 | } | |
e8344e66 | 1427 | } |
1428 | ||
c8fe9b17 | 1429 | if (aio_req) { |
fc8c3892 YZ |
1430 | LIST_HEAD(osd_reqs); |
1431 | ||
c8fe9b17 YZ |
1432 | if (aio_req->num_reqs == 0) { |
1433 | kfree(aio_req); | |
1434 | return ret; | |
1435 | } | |
1436 | ||
1437 | ceph_get_cap_refs(ci, write ? CEPH_CAP_FILE_WR : | |
1438 | CEPH_CAP_FILE_RD); | |
1439 | ||
fc8c3892 | 1440 | list_splice(&aio_req->osd_reqs, &osd_reqs); |
6a81749e | 1441 | inode_dio_begin(inode); |
fc8c3892 YZ |
1442 | while (!list_empty(&osd_reqs)) { |
1443 | req = list_first_entry(&osd_reqs, | |
c8fe9b17 | 1444 | struct ceph_osd_request, |
94e85771 ID |
1445 | r_private_item); |
1446 | list_del_init(&req->r_private_item); | |
c8fe9b17 | 1447 | if (ret >= 0) |
a8af0d68 | 1448 | ceph_osdc_start_request(req->r_osdc, req); |
c8fe9b17 YZ |
1449 | if (ret < 0) { |
1450 | req->r_result = ret; | |
85e084fe | 1451 | ceph_aio_complete_req(req); |
c8fe9b17 YZ |
1452 | } |
1453 | } | |
1454 | return -EIOCBQUEUED; | |
1455 | } | |
1456 | ||
1457 | if (ret != -EOLDSNAPC && pos > iocb->ki_pos) { | |
1458 | ret = pos - iocb->ki_pos; | |
e8344e66 | 1459 | iocb->ki_pos = pos; |
e8344e66 | 1460 | } |
1461 | return ret; | |
1462 | } | |
1463 | ||
e8344e66 | 1464 | /* |
1465 | * Synchronous write, straight from __user pointer or user pages. | |
1466 | * | |
1467 | * If write spans object boundary, just do multiple writes. (For a | |
1468 | * correct atomic write, we should e.g. take write locks on all | |
1469 | * objects, rollback on failure, etc.) | |
1470 | */ | |
06fee30f | 1471 | static ssize_t |
5dda377c YZ |
1472 | ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos, |
1473 | struct ceph_snap_context *snapc) | |
e8344e66 | 1474 | { |
1475 | struct file *file = iocb->ki_filp; | |
1476 | struct inode *inode = file_inode(file); | |
1477 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1478 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
e8344e66 | 1479 | struct ceph_vino vino; |
1480 | struct ceph_osd_request *req; | |
1481 | struct page **pages; | |
1482 | u64 len; | |
1483 | int num_pages; | |
1484 | int written = 0; | |
1485 | int flags; | |
e8344e66 | 1486 | int ret; |
efb0ca76 | 1487 | bool check_caps = false; |
fac02ddf | 1488 | struct timespec64 mtime = current_time(inode); |
4908b822 | 1489 | size_t count = iov_iter_count(from); |
e8344e66 | 1490 | |
1491 | if (ceph_snap(file_inode(file)) != CEPH_NOSNAP) | |
1492 | return -EROFS; | |
1493 | ||
1c0a9c2d YZ |
1494 | dout("sync_write on file %p %lld~%u snapc %p seq %lld\n", |
1495 | file, pos, (unsigned)count, snapc, snapc->seq); | |
e8344e66 | 1496 | |
e450f4d1 | 1497 | ret = filemap_write_and_wait_range(inode->i_mapping, |
1498 | pos, pos + count - 1); | |
e8344e66 | 1499 | if (ret < 0) |
1500 | return ret; | |
1501 | ||
400e1286 | 1502 | ceph_fscache_invalidate(inode, false); |
e8344e66 | 1503 | ret = invalidate_inode_pages2_range(inode->i_mapping, |
09cbfeaf | 1504 | pos >> PAGE_SHIFT, |
e450f4d1 | 1505 | (pos + count - 1) >> PAGE_SHIFT); |
e8344e66 | 1506 | if (ret < 0) |
1507 | dout("invalidate_inode_pages2_range returned %d\n", ret); | |
1508 | ||
b178cf43 | 1509 | flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
e8344e66 | 1510 | |
4908b822 | 1511 | while ((len = iov_iter_count(from)) > 0) { |
e8344e66 | 1512 | size_t left; |
1513 | int n; | |
1514 | ||
e8344e66 | 1515 | vino = ceph_vino(inode); |
1516 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
715e4cd4 | 1517 | vino, pos, &len, 0, 1, |
e8344e66 | 1518 | CEPH_OSD_OP_WRITE, flags, snapc, |
1519 | ci->i_truncate_seq, | |
1520 | ci->i_truncate_size, | |
1521 | false); | |
1522 | if (IS_ERR(req)) { | |
1523 | ret = PTR_ERR(req); | |
eab87235 | 1524 | break; |
e8344e66 | 1525 | } |
1526 | ||
1527 | /* | |
1528 | * write from beginning of first page, | |
1529 | * regardless of io alignment | |
1530 | */ | |
09cbfeaf | 1531 | num_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e8344e66 | 1532 | |
687265e5 | 1533 | pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); |
124e68e7 SW |
1534 | if (IS_ERR(pages)) { |
1535 | ret = PTR_ERR(pages); | |
1536 | goto out; | |
1537 | } | |
e8344e66 | 1538 | |
1539 | left = len; | |
1540 | for (n = 0; n < num_pages; n++) { | |
125d725c | 1541 | size_t plen = min_t(size_t, left, PAGE_SIZE); |
4908b822 | 1542 | ret = copy_page_from_iter(pages[n], 0, plen, from); |
e8344e66 | 1543 | if (ret != plen) { |
1544 | ret = -EFAULT; | |
1545 | break; | |
1546 | } | |
1547 | left -= ret; | |
e8344e66 | 1548 | } |
1549 | ||
124e68e7 SW |
1550 | if (ret < 0) { |
1551 | ceph_release_page_vector(pages, num_pages); | |
1552 | goto out; | |
1553 | } | |
1554 | ||
e8344e66 | 1555 | req->r_inode = inode; |
124e68e7 | 1556 | |
e8344e66 | 1557 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0, |
1558 | false, true); | |
02ee07d3 | 1559 | |
bb873b53 | 1560 | req->r_mtime = mtime; |
a8af0d68 JL |
1561 | ceph_osdc_start_request(&fsc->client->osdc, req); |
1562 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
124e68e7 | 1563 | |
8ae99ae2 | 1564 | ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, |
903f4fec | 1565 | req->r_end_latency, len, ret); |
124e68e7 | 1566 | out: |
e8344e66 | 1567 | ceph_osdc_put_request(req); |
26544c62 JL |
1568 | if (ret != 0) { |
1569 | ceph_set_error_write(ci); | |
e8344e66 | 1570 | break; |
26544c62 JL |
1571 | } |
1572 | ||
1573 | ceph_clear_error_write(ci); | |
1574 | pos += len; | |
1575 | written += len; | |
1576 | if (pos > i_size_read(inode)) { | |
1577 | check_caps = ceph_inode_set_size(inode, pos); | |
1578 | if (check_caps) | |
1579 | ceph_check_caps(ceph_inode(inode), | |
1580 | CHECK_CAPS_AUTHONLY, | |
1581 | NULL); | |
1582 | } | |
1583 | ||
e8344e66 | 1584 | } |
124e68e7 | 1585 | |
e8344e66 | 1586 | if (ret != -EOLDSNAPC && written > 0) { |
124e68e7 | 1587 | ret = written; |
e8344e66 | 1588 | iocb->ki_pos = pos; |
124e68e7 SW |
1589 | } |
1590 | return ret; | |
1591 | } | |
1592 | ||
1593 | /* | |
1594 | * Wrap generic_file_aio_read with checks for cap bits on the inode. | |
1595 | * Atomically grab references, so that those bits are not released | |
1596 | * back to the MDS mid-read. | |
1597 | * | |
1598 | * Hmm, the sync read case isn't actually async... should it be? | |
1599 | */ | |
3644424d | 1600 | static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to) |
124e68e7 SW |
1601 | { |
1602 | struct file *filp = iocb->ki_filp; | |
2962507c | 1603 | struct ceph_file_info *fi = filp->private_data; |
66ee59af | 1604 | size_t len = iov_iter_count(to); |
496ad9aa | 1605 | struct inode *inode = file_inode(filp); |
124e68e7 | 1606 | struct ceph_inode_info *ci = ceph_inode(inode); |
d1d96550 | 1607 | bool direct_lock = iocb->ki_flags & IOCB_DIRECT; |
124e68e7 | 1608 | ssize_t ret; |
94cc0877 | 1609 | int want = 0, got = 0; |
83701246 | 1610 | int retry_op = 0, read = 0; |
124e68e7 | 1611 | |
6a026589 | 1612 | again: |
8eb4efb0 | 1613 | dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n", |
1614 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, inode); | |
1615 | ||
5d6451b1 JL |
1616 | if (ceph_inode_is_shutdown(inode)) |
1617 | return -ESTALE; | |
1618 | ||
d1d96550 | 1619 | if (direct_lock) |
a81bc310 JL |
1620 | ceph_start_io_direct(inode); |
1621 | else | |
1622 | ceph_start_io_read(inode); | |
1623 | ||
94cc0877 JL |
1624 | if (!(fi->flags & CEPH_F_SYNC) && !direct_lock) |
1625 | want |= CEPH_CAP_FILE_CACHE; | |
2962507c | 1626 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
94cc0877 JL |
1627 | want |= CEPH_CAP_FILE_LAZYIO; |
1628 | ||
e72968e1 | 1629 | ret = ceph_get_caps(filp, CEPH_CAP_FILE_RD, want, -1, &got); |
a81bc310 | 1630 | if (ret < 0) { |
94cc0877 | 1631 | if (direct_lock) |
a81bc310 JL |
1632 | ceph_end_io_direct(inode); |
1633 | else | |
1634 | ceph_end_io_read(inode); | |
8eb4efb0 | 1635 | return ret; |
a81bc310 | 1636 | } |
124e68e7 | 1637 | |
2962507c | 1638 | if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 || |
2ba48ce5 | 1639 | (iocb->ki_flags & IOCB_DIRECT) || |
8eb4efb0 | 1640 | (fi->flags & CEPH_F_SYNC)) { |
8eb4efb0 | 1641 | |
1642 | dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n", | |
1643 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, | |
1644 | ceph_cap_string(got)); | |
1645 | ||
48490776 | 1646 | if (!ceph_has_inline_data(ci)) { |
c8fe9b17 YZ |
1647 | if (!retry_op && (iocb->ki_flags & IOCB_DIRECT)) { |
1648 | ret = ceph_direct_read_write(iocb, to, | |
1649 | NULL, NULL); | |
1650 | if (ret >= 0 && ret < len) | |
1651 | retry_op = CHECK_EOF; | |
1652 | } else { | |
1653 | ret = ceph_sync_read(iocb, to, &retry_op); | |
1654 | } | |
83701246 YZ |
1655 | } else { |
1656 | retry_op = READ_INLINE; | |
1657 | } | |
8eb4efb0 | 1658 | } else { |
5d988308 | 1659 | CEPH_DEFINE_RW_CONTEXT(rw_ctx, got); |
8eb4efb0 | 1660 | dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n", |
3644424d | 1661 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, |
8eb4efb0 | 1662 | ceph_cap_string(got)); |
5d988308 | 1663 | ceph_add_rw_context(fi, &rw_ctx); |
3644424d | 1664 | ret = generic_file_read_iter(iocb, to); |
5d988308 | 1665 | ceph_del_rw_context(fi, &rw_ctx); |
8eb4efb0 | 1666 | } |
a81bc310 | 1667 | |
124e68e7 SW |
1668 | dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n", |
1669 | inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret); | |
1670 | ceph_put_cap_refs(ci, got); | |
a81bc310 | 1671 | |
d1d96550 | 1672 | if (direct_lock) |
a81bc310 JL |
1673 | ceph_end_io_direct(inode); |
1674 | else | |
1675 | ceph_end_io_read(inode); | |
1676 | ||
c8fe9b17 | 1677 | if (retry_op > HAVE_RETRIED && ret >= 0) { |
83701246 YZ |
1678 | int statret; |
1679 | struct page *page = NULL; | |
1680 | loff_t i_size; | |
1681 | if (retry_op == READ_INLINE) { | |
687265e5 | 1682 | page = __page_cache_alloc(GFP_KERNEL); |
83701246 YZ |
1683 | if (!page) |
1684 | return -ENOMEM; | |
1685 | } | |
6a026589 | 1686 | |
83701246 YZ |
1687 | statret = __ceph_do_getattr(inode, page, |
1688 | CEPH_STAT_CAP_INLINE_DATA, !!page); | |
1689 | if (statret < 0) { | |
0d7718f6 NB |
1690 | if (page) |
1691 | __free_page(page); | |
83701246 YZ |
1692 | if (statret == -ENODATA) { |
1693 | BUG_ON(retry_op != READ_INLINE); | |
1694 | goto again; | |
1695 | } | |
1696 | return statret; | |
1697 | } | |
6a026589 | 1698 | |
83701246 YZ |
1699 | i_size = i_size_read(inode); |
1700 | if (retry_op == READ_INLINE) { | |
fcc02d2a YZ |
1701 | BUG_ON(ret > 0 || read > 0); |
1702 | if (iocb->ki_pos < i_size && | |
09cbfeaf | 1703 | iocb->ki_pos < PAGE_SIZE) { |
83701246 YZ |
1704 | loff_t end = min_t(loff_t, i_size, |
1705 | iocb->ki_pos + len); | |
09cbfeaf | 1706 | end = min_t(loff_t, end, PAGE_SIZE); |
83701246 YZ |
1707 | if (statret < end) |
1708 | zero_user_segment(page, statret, end); | |
1709 | ret = copy_page_to_iter(page, | |
1710 | iocb->ki_pos & ~PAGE_MASK, | |
1711 | end - iocb->ki_pos, to); | |
1712 | iocb->ki_pos += ret; | |
fcc02d2a YZ |
1713 | read += ret; |
1714 | } | |
1715 | if (iocb->ki_pos < i_size && read < len) { | |
1716 | size_t zlen = min_t(size_t, len - read, | |
1717 | i_size - iocb->ki_pos); | |
1718 | ret = iov_iter_zero(zlen, to); | |
1719 | iocb->ki_pos += ret; | |
1720 | read += ret; | |
83701246 YZ |
1721 | } |
1722 | __free_pages(page, 0); | |
fcc02d2a | 1723 | return read; |
83701246 | 1724 | } |
6a026589 SW |
1725 | |
1726 | /* hit EOF or hole? */ | |
83701246 | 1727 | if (retry_op == CHECK_EOF && iocb->ki_pos < i_size && |
fcc02d2a | 1728 | ret < len) { |
8eb4efb0 | 1729 | dout("sync_read hit hole, ppos %lld < size %lld" |
99c88e69 | 1730 | ", reading more\n", iocb->ki_pos, i_size); |
8eb4efb0 | 1731 | |
6a026589 | 1732 | read += ret; |
6a026589 | 1733 | len -= ret; |
c8fe9b17 | 1734 | retry_op = HAVE_RETRIED; |
6a026589 SW |
1735 | goto again; |
1736 | } | |
1737 | } | |
8eb4efb0 | 1738 | |
6a026589 SW |
1739 | if (ret >= 0) |
1740 | ret += read; | |
1741 | ||
124e68e7 SW |
1742 | return ret; |
1743 | } | |
1744 | ||
1745 | /* | |
1746 | * Take cap references to avoid releasing caps to MDS mid-write. | |
1747 | * | |
1748 | * If we are synchronous, and write with an old snap context, the OSD | |
1749 | * may return EOLDSNAPC. In that case, retry the write.. _after_ | |
1750 | * dropping our cap refs and allowing the pending snap to logically | |
1751 | * complete _before_ this write occurs. | |
1752 | * | |
1753 | * If we are near ENOSPC, write synchronously. | |
1754 | */ | |
4908b822 | 1755 | static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) |
124e68e7 SW |
1756 | { |
1757 | struct file *file = iocb->ki_filp; | |
33caad32 | 1758 | struct ceph_file_info *fi = file->private_data; |
496ad9aa | 1759 | struct inode *inode = file_inode(file); |
124e68e7 | 1760 | struct ceph_inode_info *ci = ceph_inode(inode); |
8687a3e2 | 1761 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
76142097 | 1762 | struct ceph_osd_client *osdc = &fsc->client->osdc; |
f66fd9f0 | 1763 | struct ceph_cap_flush *prealloc_cf; |
3309dd04 | 1764 | ssize_t count, written = 0; |
94cc0877 | 1765 | int err, want = 0, got; |
8e4473bb | 1766 | bool direct_lock = false; |
76142097 ID |
1767 | u32 map_flags; |
1768 | u64 pool_flags; | |
3309dd04 | 1769 | loff_t pos; |
8687a3e2 | 1770 | loff_t limit = max(i_size_read(inode), fsc->max_file_size); |
124e68e7 | 1771 | |
5d6451b1 JL |
1772 | if (ceph_inode_is_shutdown(inode)) |
1773 | return -ESTALE; | |
1774 | ||
124e68e7 SW |
1775 | if (ceph_snap(inode) != CEPH_NOSNAP) |
1776 | return -EROFS; | |
1777 | ||
f66fd9f0 YZ |
1778 | prealloc_cf = ceph_alloc_cap_flush(); |
1779 | if (!prealloc_cf) | |
1780 | return -ENOMEM; | |
1781 | ||
8e4473bb XL |
1782 | if ((iocb->ki_flags & (IOCB_DIRECT | IOCB_APPEND)) == IOCB_DIRECT) |
1783 | direct_lock = true; | |
1784 | ||
a5cd74ad | 1785 | retry_snap: |
8e4473bb | 1786 | if (direct_lock) |
321fe13c JL |
1787 | ceph_start_io_direct(inode); |
1788 | else | |
1789 | ceph_start_io_write(inode); | |
03d254ed | 1790 | |
03d254ed | 1791 | /* We can write back this queue in page reclaim */ |
de1414a6 | 1792 | current->backing_dev_info = inode_to_bdi(inode); |
03d254ed | 1793 | |
55b0b31c YZ |
1794 | if (iocb->ki_flags & IOCB_APPEND) { |
1795 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); | |
1796 | if (err < 0) | |
1797 | goto out; | |
1798 | } | |
1799 | ||
3309dd04 AV |
1800 | err = generic_write_checks(iocb, from); |
1801 | if (err <= 0) | |
03d254ed YZ |
1802 | goto out; |
1803 | ||
3309dd04 | 1804 | pos = iocb->ki_pos; |
8687a3e2 CX |
1805 | if (unlikely(pos >= limit)) { |
1806 | err = -EFBIG; | |
1807 | goto out; | |
1808 | } else { | |
1809 | iov_iter_truncate(from, limit - pos); | |
1810 | } | |
1811 | ||
3309dd04 | 1812 | count = iov_iter_count(from); |
2b83845f LH |
1813 | if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) { |
1814 | err = -EDQUOT; | |
1815 | goto out; | |
1816 | } | |
1817 | ||
b11ed503 JL |
1818 | down_read(&osdc->lock); |
1819 | map_flags = osdc->osdmap->flags; | |
1820 | pool_flags = ceph_pg_pool_flags(osdc->osdmap, ci->i_layout.pool_id); | |
1821 | up_read(&osdc->lock); | |
1822 | if ((map_flags & CEPH_OSDMAP_FULL) || | |
1823 | (pool_flags & CEPH_POOL_FLAG_FULL)) { | |
1824 | err = -ENOSPC; | |
03d254ed | 1825 | goto out; |
b11ed503 | 1826 | } |
03d254ed | 1827 | |
b11ed503 | 1828 | err = file_remove_privs(file); |
03d254ed YZ |
1829 | if (err) |
1830 | goto out; | |
1831 | ||
ac7f29bf | 1832 | dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n", |
99c88e69 | 1833 | inode, ceph_vinop(inode), pos, count, i_size_read(inode)); |
94cc0877 JL |
1834 | if (!(fi->flags & CEPH_F_SYNC) && !direct_lock) |
1835 | want |= CEPH_CAP_FILE_BUFFER; | |
7971bd92 | 1836 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
94cc0877 | 1837 | want |= CEPH_CAP_FILE_LAZYIO; |
03d254ed | 1838 | got = 0; |
e72968e1 | 1839 | err = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, pos + count, &got); |
03d254ed | 1840 | if (err < 0) |
37505d57 | 1841 | goto out; |
124e68e7 | 1842 | |
b11ed503 JL |
1843 | err = file_update_time(file); |
1844 | if (err) | |
1845 | goto out_caps; | |
1846 | ||
1847 | inode_inc_iversion_raw(inode); | |
1848 | ||
ac7f29bf | 1849 | dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n", |
03d254ed | 1850 | inode, ceph_vinop(inode), pos, count, ceph_cap_string(got)); |
7971bd92 SW |
1851 | |
1852 | if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 || | |
26544c62 JL |
1853 | (iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) || |
1854 | (ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) { | |
5dda377c | 1855 | struct ceph_snap_context *snapc; |
4908b822 | 1856 | struct iov_iter data; |
5dda377c YZ |
1857 | |
1858 | spin_lock(&ci->i_ceph_lock); | |
1859 | if (__ceph_have_pending_cap_snap(ci)) { | |
1860 | struct ceph_cap_snap *capsnap = | |
1861 | list_last_entry(&ci->i_cap_snaps, | |
1862 | struct ceph_cap_snap, | |
1863 | ci_item); | |
1864 | snapc = ceph_get_snap_context(capsnap->context); | |
1865 | } else { | |
1866 | BUG_ON(!ci->i_head_snapc); | |
1867 | snapc = ceph_get_snap_context(ci->i_head_snapc); | |
1868 | } | |
1869 | spin_unlock(&ci->i_ceph_lock); | |
1870 | ||
4908b822 AV |
1871 | /* we might need to revert back to that point */ |
1872 | data = *from; | |
8e4473bb | 1873 | if (iocb->ki_flags & IOCB_DIRECT) |
c8fe9b17 YZ |
1874 | written = ceph_direct_read_write(iocb, &data, snapc, |
1875 | &prealloc_cf); | |
8e4473bb | 1876 | else |
5dda377c | 1877 | written = ceph_sync_write(iocb, &data, pos, snapc); |
8e4473bb XL |
1878 | if (direct_lock) |
1879 | ceph_end_io_direct(inode); | |
1880 | else | |
321fe13c | 1881 | ceph_end_io_write(inode); |
4908b822 AV |
1882 | if (written > 0) |
1883 | iov_iter_advance(from, written); | |
5dda377c | 1884 | ceph_put_snap_context(snapc); |
7971bd92 | 1885 | } else { |
b0d7c223 YZ |
1886 | /* |
1887 | * No need to acquire the i_truncate_mutex. Because | |
1888 | * the MDS revokes Fwb caps before sending truncate | |
1889 | * message to us. We can't get Fwb cap while there | |
1890 | * are pending vmtruncate. So write and vmtruncate | |
1891 | * can not run at the same time | |
1892 | */ | |
800ba295 | 1893 | written = generic_perform_write(iocb, from); |
aec605f4 AV |
1894 | if (likely(written >= 0)) |
1895 | iocb->ki_pos = pos + written; | |
321fe13c | 1896 | ceph_end_io_write(inode); |
7971bd92 | 1897 | } |
d8de9ab6 | 1898 | |
03d254ed | 1899 | if (written >= 0) { |
fca65b4a | 1900 | int dirty; |
1ab302a0 | 1901 | |
be655596 | 1902 | spin_lock(&ci->i_ceph_lock); |
f66fd9f0 YZ |
1903 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
1904 | &prealloc_cf); | |
be655596 | 1905 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
1906 | if (dirty) |
1907 | __mark_inode_dirty(inode, dirty); | |
1ab302a0 | 1908 | if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos)) |
e027ddb6 | 1909 | ceph_check_caps(ci, CHECK_CAPS_FLUSH, NULL); |
124e68e7 | 1910 | } |
7971bd92 | 1911 | |
124e68e7 | 1912 | dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n", |
4908b822 | 1913 | inode, ceph_vinop(inode), pos, (unsigned)count, |
7971bd92 | 1914 | ceph_cap_string(got)); |
124e68e7 | 1915 | ceph_put_cap_refs(ci, got); |
7971bd92 | 1916 | |
a5cd74ad YZ |
1917 | if (written == -EOLDSNAPC) { |
1918 | dout("aio_write %p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n", | |
1919 | inode, ceph_vinop(inode), pos, (unsigned)count); | |
1920 | goto retry_snap; | |
1921 | } | |
1922 | ||
6aa657c8 | 1923 | if (written >= 0) { |
76142097 ID |
1924 | if ((map_flags & CEPH_OSDMAP_NEARFULL) || |
1925 | (pool_flags & CEPH_POOL_FLAG_NEARFULL)) | |
6aa657c8 | 1926 | iocb->ki_flags |= IOCB_DSYNC; |
6aa657c8 | 1927 | written = generic_write_sync(iocb, written); |
6070e0c1 | 1928 | } |
03d254ed | 1929 | |
2f75e9e1 | 1930 | goto out_unlocked; |
b11ed503 JL |
1931 | out_caps: |
1932 | ceph_put_cap_refs(ci, got); | |
03d254ed | 1933 | out: |
8e4473bb | 1934 | if (direct_lock) |
321fe13c JL |
1935 | ceph_end_io_direct(inode); |
1936 | else | |
1937 | ceph_end_io_write(inode); | |
2f75e9e1 | 1938 | out_unlocked: |
f66fd9f0 | 1939 | ceph_free_cap_flush(prealloc_cf); |
03d254ed | 1940 | current->backing_dev_info = NULL; |
03d254ed | 1941 | return written ? written : err; |
124e68e7 SW |
1942 | } |
1943 | ||
1944 | /* | |
1945 | * llseek. be sure to verify file size on SEEK_END. | |
1946 | */ | |
965c8e59 | 1947 | static loff_t ceph_llseek(struct file *file, loff_t offset, int whence) |
124e68e7 | 1948 | { |
965c8e59 | 1949 | if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) { |
e8214503 JL |
1950 | struct inode *inode = file_inode(file); |
1951 | int ret; | |
1952 | ||
508b32d8 | 1953 | ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); |
955818cd | 1954 | if (ret < 0) |
e8214503 | 1955 | return ret; |
124e68e7 | 1956 | } |
e8214503 | 1957 | return generic_file_llseek(file, offset, whence); |
124e68e7 SW |
1958 | } |
1959 | ||
ad7a60de LW |
1960 | static inline void ceph_zero_partial_page( |
1961 | struct inode *inode, loff_t offset, unsigned size) | |
1962 | { | |
1963 | struct page *page; | |
09cbfeaf | 1964 | pgoff_t index = offset >> PAGE_SHIFT; |
ad7a60de LW |
1965 | |
1966 | page = find_lock_page(inode->i_mapping, index); | |
1967 | if (page) { | |
1968 | wait_on_page_writeback(page); | |
09cbfeaf | 1969 | zero_user(page, offset & (PAGE_SIZE - 1), size); |
ad7a60de | 1970 | unlock_page(page); |
09cbfeaf | 1971 | put_page(page); |
ad7a60de LW |
1972 | } |
1973 | } | |
1974 | ||
1975 | static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset, | |
1976 | loff_t length) | |
1977 | { | |
09cbfeaf | 1978 | loff_t nearly = round_up(offset, PAGE_SIZE); |
ad7a60de LW |
1979 | if (offset < nearly) { |
1980 | loff_t size = nearly - offset; | |
1981 | if (length < size) | |
1982 | size = length; | |
1983 | ceph_zero_partial_page(inode, offset, size); | |
1984 | offset += size; | |
1985 | length -= size; | |
1986 | } | |
09cbfeaf KS |
1987 | if (length >= PAGE_SIZE) { |
1988 | loff_t size = round_down(length, PAGE_SIZE); | |
ad7a60de LW |
1989 | truncate_pagecache_range(inode, offset, offset + size - 1); |
1990 | offset += size; | |
1991 | length -= size; | |
1992 | } | |
1993 | if (length) | |
1994 | ceph_zero_partial_page(inode, offset, length); | |
1995 | } | |
1996 | ||
1997 | static int ceph_zero_partial_object(struct inode *inode, | |
1998 | loff_t offset, loff_t *length) | |
1999 | { | |
2000 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2001 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
2002 | struct ceph_osd_request *req; | |
2003 | int ret = 0; | |
2004 | loff_t zero = 0; | |
2005 | int op; | |
2006 | ||
2007 | if (!length) { | |
2008 | op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE; | |
2009 | length = &zero; | |
2010 | } else { | |
2011 | op = CEPH_OSD_OP_ZERO; | |
2012 | } | |
2013 | ||
2014 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
2015 | ceph_vino(inode), | |
2016 | offset, length, | |
715e4cd4 | 2017 | 0, 1, op, |
54ea0046 | 2018 | CEPH_OSD_FLAG_WRITE, |
ad7a60de LW |
2019 | NULL, 0, 0, false); |
2020 | if (IS_ERR(req)) { | |
2021 | ret = PTR_ERR(req); | |
2022 | goto out; | |
2023 | } | |
2024 | ||
fac02ddf | 2025 | req->r_mtime = inode->i_mtime; |
a8af0d68 JL |
2026 | ceph_osdc_start_request(&fsc->client->osdc, req); |
2027 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
2028 | if (ret == -ENOENT) | |
2029 | ret = 0; | |
ad7a60de LW |
2030 | ceph_osdc_put_request(req); |
2031 | ||
2032 | out: | |
2033 | return ret; | |
2034 | } | |
2035 | ||
2036 | static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length) | |
2037 | { | |
2038 | int ret = 0; | |
2039 | struct ceph_inode_info *ci = ceph_inode(inode); | |
7627151e YZ |
2040 | s32 stripe_unit = ci->i_layout.stripe_unit; |
2041 | s32 stripe_count = ci->i_layout.stripe_count; | |
2042 | s32 object_size = ci->i_layout.object_size; | |
b314a90d SW |
2043 | u64 object_set_size = object_size * stripe_count; |
2044 | u64 nearly, t; | |
2045 | ||
2046 | /* round offset up to next period boundary */ | |
2047 | nearly = offset + object_set_size - 1; | |
2048 | t = nearly; | |
2049 | nearly -= do_div(t, object_set_size); | |
ad7a60de | 2050 | |
ad7a60de LW |
2051 | while (length && offset < nearly) { |
2052 | loff_t size = length; | |
2053 | ret = ceph_zero_partial_object(inode, offset, &size); | |
2054 | if (ret < 0) | |
2055 | return ret; | |
2056 | offset += size; | |
2057 | length -= size; | |
2058 | } | |
2059 | while (length >= object_set_size) { | |
2060 | int i; | |
2061 | loff_t pos = offset; | |
2062 | for (i = 0; i < stripe_count; ++i) { | |
2063 | ret = ceph_zero_partial_object(inode, pos, NULL); | |
2064 | if (ret < 0) | |
2065 | return ret; | |
2066 | pos += stripe_unit; | |
2067 | } | |
2068 | offset += object_set_size; | |
2069 | length -= object_set_size; | |
2070 | } | |
2071 | while (length) { | |
2072 | loff_t size = length; | |
2073 | ret = ceph_zero_partial_object(inode, offset, &size); | |
2074 | if (ret < 0) | |
2075 | return ret; | |
2076 | offset += size; | |
2077 | length -= size; | |
2078 | } | |
2079 | return ret; | |
2080 | } | |
2081 | ||
2082 | static long ceph_fallocate(struct file *file, int mode, | |
2083 | loff_t offset, loff_t length) | |
2084 | { | |
2085 | struct ceph_file_info *fi = file->private_data; | |
aa8b60e0 | 2086 | struct inode *inode = file_inode(file); |
ad7a60de | 2087 | struct ceph_inode_info *ci = ceph_inode(inode); |
f66fd9f0 | 2088 | struct ceph_cap_flush *prealloc_cf; |
ad7a60de LW |
2089 | int want, got = 0; |
2090 | int dirty; | |
2091 | int ret = 0; | |
2092 | loff_t endoff = 0; | |
2093 | loff_t size; | |
2094 | ||
bddff633 | 2095 | if (mode != (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
494d77bf YZ |
2096 | return -EOPNOTSUPP; |
2097 | ||
ad7a60de LW |
2098 | if (!S_ISREG(inode->i_mode)) |
2099 | return -EOPNOTSUPP; | |
2100 | ||
f66fd9f0 YZ |
2101 | prealloc_cf = ceph_alloc_cap_flush(); |
2102 | if (!prealloc_cf) | |
2103 | return -ENOMEM; | |
2104 | ||
5955102c | 2105 | inode_lock(inode); |
ad7a60de LW |
2106 | |
2107 | if (ceph_snap(inode) != CEPH_NOSNAP) { | |
2108 | ret = -EROFS; | |
2109 | goto unlock; | |
2110 | } | |
2111 | ||
ad7a60de | 2112 | size = i_size_read(inode); |
bddff633 LH |
2113 | |
2114 | /* Are we punching a hole beyond EOF? */ | |
2115 | if (offset >= size) | |
2116 | goto unlock; | |
2117 | if ((offset + length) > size) | |
2118 | length = size - offset; | |
ad7a60de LW |
2119 | |
2120 | if (fi->fmode & CEPH_FILE_MODE_LAZY) | |
2121 | want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; | |
2122 | else | |
2123 | want = CEPH_CAP_FILE_BUFFER; | |
2124 | ||
e72968e1 | 2125 | ret = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, endoff, &got); |
ad7a60de LW |
2126 | if (ret < 0) |
2127 | goto unlock; | |
2128 | ||
057ba5b2 | 2129 | filemap_invalidate_lock(inode->i_mapping); |
400e1286 | 2130 | ceph_fscache_invalidate(inode, false); |
bddff633 LH |
2131 | ceph_zero_pagecache_range(inode, offset, length); |
2132 | ret = ceph_zero_objects(inode, offset, length); | |
ad7a60de LW |
2133 | |
2134 | if (!ret) { | |
2135 | spin_lock(&ci->i_ceph_lock); | |
f66fd9f0 YZ |
2136 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
2137 | &prealloc_cf); | |
ad7a60de LW |
2138 | spin_unlock(&ci->i_ceph_lock); |
2139 | if (dirty) | |
2140 | __mark_inode_dirty(inode, dirty); | |
2141 | } | |
057ba5b2 | 2142 | filemap_invalidate_unlock(inode->i_mapping); |
ad7a60de LW |
2143 | |
2144 | ceph_put_cap_refs(ci, got); | |
2145 | unlock: | |
5955102c | 2146 | inode_unlock(inode); |
f66fd9f0 | 2147 | ceph_free_cap_flush(prealloc_cf); |
ad7a60de LW |
2148 | return ret; |
2149 | } | |
2150 | ||
503f82a9 LH |
2151 | /* |
2152 | * This function tries to get FILE_WR capabilities for dst_ci and FILE_RD for | |
2153 | * src_ci. Two attempts are made to obtain both caps, and an error is return if | |
2154 | * this fails; zero is returned on success. | |
2155 | */ | |
5e3ded1b YZ |
2156 | static int get_rd_wr_caps(struct file *src_filp, int *src_got, |
2157 | struct file *dst_filp, | |
503f82a9 LH |
2158 | loff_t dst_endoff, int *dst_got) |
2159 | { | |
2160 | int ret = 0; | |
2161 | bool retrying = false; | |
2162 | ||
2163 | retry_caps: | |
5e3ded1b | 2164 | ret = ceph_get_caps(dst_filp, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER, |
e72968e1 | 2165 | dst_endoff, dst_got); |
503f82a9 LH |
2166 | if (ret < 0) |
2167 | return ret; | |
2168 | ||
2169 | /* | |
2170 | * Since we're already holding the FILE_WR capability for the dst file, | |
2171 | * we would risk a deadlock by using ceph_get_caps. Thus, we'll do some | |
2172 | * retry dance instead to try to get both capabilities. | |
2173 | */ | |
5e3ded1b YZ |
2174 | ret = ceph_try_get_caps(file_inode(src_filp), |
2175 | CEPH_CAP_FILE_RD, CEPH_CAP_FILE_SHARED, | |
503f82a9 LH |
2176 | false, src_got); |
2177 | if (ret <= 0) { | |
2178 | /* Start by dropping dst_ci caps and getting src_ci caps */ | |
5e3ded1b | 2179 | ceph_put_cap_refs(ceph_inode(file_inode(dst_filp)), *dst_got); |
503f82a9 LH |
2180 | if (retrying) { |
2181 | if (!ret) | |
2182 | /* ceph_try_get_caps masks EAGAIN */ | |
2183 | ret = -EAGAIN; | |
2184 | return ret; | |
2185 | } | |
5e3ded1b | 2186 | ret = ceph_get_caps(src_filp, CEPH_CAP_FILE_RD, |
e72968e1 | 2187 | CEPH_CAP_FILE_SHARED, -1, src_got); |
503f82a9 LH |
2188 | if (ret < 0) |
2189 | return ret; | |
2190 | /*... drop src_ci caps too, and retry */ | |
5e3ded1b | 2191 | ceph_put_cap_refs(ceph_inode(file_inode(src_filp)), *src_got); |
503f82a9 LH |
2192 | retrying = true; |
2193 | goto retry_caps; | |
2194 | } | |
2195 | return ret; | |
2196 | } | |
2197 | ||
2198 | static void put_rd_wr_caps(struct ceph_inode_info *src_ci, int src_got, | |
2199 | struct ceph_inode_info *dst_ci, int dst_got) | |
2200 | { | |
2201 | ceph_put_cap_refs(src_ci, src_got); | |
2202 | ceph_put_cap_refs(dst_ci, dst_got); | |
2203 | } | |
2204 | ||
2205 | /* | |
2206 | * This function does several size-related checks, returning an error if: | |
2207 | * - source file is smaller than off+len | |
2208 | * - destination file size is not OK (inode_newsize_ok()) | |
2209 | * - max bytes quotas is exceeded | |
2210 | */ | |
2211 | static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode, | |
2212 | loff_t src_off, loff_t dst_off, size_t len) | |
2213 | { | |
2214 | loff_t size, endoff; | |
2215 | ||
2216 | size = i_size_read(src_inode); | |
2217 | /* | |
2218 | * Don't copy beyond source file EOF. Instead of simply setting length | |
2219 | * to (size - src_off), just drop to VFS default implementation, as the | |
2220 | * local i_size may be stale due to other clients writing to the source | |
2221 | * inode. | |
2222 | */ | |
2223 | if (src_off + len > size) { | |
2224 | dout("Copy beyond EOF (%llu + %zu > %llu)\n", | |
2225 | src_off, len, size); | |
2226 | return -EOPNOTSUPP; | |
2227 | } | |
2228 | size = i_size_read(dst_inode); | |
2229 | ||
2230 | endoff = dst_off + len; | |
2231 | if (inode_newsize_ok(dst_inode, endoff)) | |
2232 | return -EOPNOTSUPP; | |
2233 | ||
2234 | if (ceph_quota_is_max_bytes_exceeded(dst_inode, endoff)) | |
2235 | return -EDQUOT; | |
2236 | ||
2237 | return 0; | |
2238 | } | |
2239 | ||
aca39d9e LH |
2240 | static struct ceph_osd_request * |
2241 | ceph_alloc_copyfrom_request(struct ceph_osd_client *osdc, | |
2242 | u64 src_snapid, | |
2243 | struct ceph_object_id *src_oid, | |
2244 | struct ceph_object_locator *src_oloc, | |
2245 | struct ceph_object_id *dst_oid, | |
2246 | struct ceph_object_locator *dst_oloc, | |
2247 | u32 truncate_seq, u64 truncate_size) | |
2248 | { | |
2249 | struct ceph_osd_request *req; | |
2250 | int ret; | |
2251 | u32 src_fadvise_flags = | |
2252 | CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL | | |
2253 | CEPH_OSD_OP_FLAG_FADVISE_NOCACHE; | |
2254 | u32 dst_fadvise_flags = | |
2255 | CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL | | |
2256 | CEPH_OSD_OP_FLAG_FADVISE_DONTNEED; | |
2257 | ||
2258 | req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL); | |
2259 | if (!req) | |
2260 | return ERR_PTR(-ENOMEM); | |
2261 | ||
2262 | req->r_flags = CEPH_OSD_FLAG_WRITE; | |
2263 | ||
2264 | ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc); | |
2265 | ceph_oid_copy(&req->r_t.base_oid, dst_oid); | |
2266 | ||
2267 | ret = osd_req_op_copy_from_init(req, src_snapid, 0, | |
2268 | src_oid, src_oloc, | |
2269 | src_fadvise_flags, | |
2270 | dst_fadvise_flags, | |
2271 | truncate_seq, | |
2272 | truncate_size, | |
2273 | CEPH_OSD_COPY_FROM_FLAG_TRUNCATE_SEQ); | |
2274 | if (ret) | |
2275 | goto out; | |
2276 | ||
2277 | ret = ceph_osdc_alloc_messages(req, GFP_KERNEL); | |
2278 | if (ret) | |
2279 | goto out; | |
2280 | ||
2281 | return req; | |
2282 | ||
2283 | out: | |
2284 | ceph_osdc_put_request(req); | |
2285 | return ERR_PTR(ret); | |
2286 | } | |
2287 | ||
1b0c3b9f LH |
2288 | static ssize_t ceph_do_objects_copy(struct ceph_inode_info *src_ci, u64 *src_off, |
2289 | struct ceph_inode_info *dst_ci, u64 *dst_off, | |
2290 | struct ceph_fs_client *fsc, | |
2291 | size_t len, unsigned int flags) | |
2292 | { | |
2293 | struct ceph_object_locator src_oloc, dst_oloc; | |
2294 | struct ceph_object_id src_oid, dst_oid; | |
aca39d9e LH |
2295 | struct ceph_osd_client *osdc; |
2296 | struct ceph_osd_request *req; | |
1b0c3b9f LH |
2297 | size_t bytes = 0; |
2298 | u64 src_objnum, src_objoff, dst_objnum, dst_objoff; | |
2299 | u32 src_objlen, dst_objlen; | |
2300 | u32 object_size = src_ci->i_layout.object_size; | |
2301 | int ret; | |
2302 | ||
2303 | src_oloc.pool = src_ci->i_layout.pool_id; | |
2304 | src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns); | |
2305 | dst_oloc.pool = dst_ci->i_layout.pool_id; | |
2306 | dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns); | |
aca39d9e | 2307 | osdc = &fsc->client->osdc; |
1b0c3b9f LH |
2308 | |
2309 | while (len >= object_size) { | |
2310 | ceph_calc_file_object_mapping(&src_ci->i_layout, *src_off, | |
2311 | object_size, &src_objnum, | |
2312 | &src_objoff, &src_objlen); | |
2313 | ceph_calc_file_object_mapping(&dst_ci->i_layout, *dst_off, | |
2314 | object_size, &dst_objnum, | |
2315 | &dst_objoff, &dst_objlen); | |
2316 | ceph_oid_init(&src_oid); | |
2317 | ceph_oid_printf(&src_oid, "%llx.%08llx", | |
2318 | src_ci->i_vino.ino, src_objnum); | |
2319 | ceph_oid_init(&dst_oid); | |
2320 | ceph_oid_printf(&dst_oid, "%llx.%08llx", | |
2321 | dst_ci->i_vino.ino, dst_objnum); | |
2322 | /* Do an object remote copy */ | |
aca39d9e LH |
2323 | req = ceph_alloc_copyfrom_request(osdc, src_ci->i_vino.snap, |
2324 | &src_oid, &src_oloc, | |
2325 | &dst_oid, &dst_oloc, | |
2326 | dst_ci->i_truncate_seq, | |
2327 | dst_ci->i_truncate_size); | |
2328 | if (IS_ERR(req)) | |
2329 | ret = PTR_ERR(req); | |
2330 | else { | |
a8af0d68 | 2331 | ceph_osdc_start_request(osdc, req); |
aca39d9e | 2332 | ret = ceph_osdc_wait_request(osdc, req); |
c02cb7bd LH |
2333 | ceph_update_copyfrom_metrics(&fsc->mdsc->metric, |
2334 | req->r_start_latency, | |
2335 | req->r_end_latency, | |
2336 | object_size, ret); | |
aca39d9e LH |
2337 | ceph_osdc_put_request(req); |
2338 | } | |
1b0c3b9f LH |
2339 | if (ret) { |
2340 | if (ret == -EOPNOTSUPP) { | |
2341 | fsc->have_copy_from2 = false; | |
2342 | pr_notice("OSDs don't support copy-from2; disabling copy offload\n"); | |
2343 | } | |
2344 | dout("ceph_osdc_copy_from returned %d\n", ret); | |
2345 | if (!bytes) | |
2346 | bytes = ret; | |
2347 | goto out; | |
2348 | } | |
2349 | len -= object_size; | |
2350 | bytes += object_size; | |
2351 | *src_off += object_size; | |
2352 | *dst_off += object_size; | |
2353 | } | |
2354 | ||
2355 | out: | |
2356 | ceph_oloc_destroy(&src_oloc); | |
2357 | ceph_oloc_destroy(&dst_oloc); | |
2358 | return bytes; | |
2359 | } | |
2360 | ||
64bf5ff5 DC |
2361 | static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off, |
2362 | struct file *dst_file, loff_t dst_off, | |
2363 | size_t len, unsigned int flags) | |
503f82a9 LH |
2364 | { |
2365 | struct inode *src_inode = file_inode(src_file); | |
2366 | struct inode *dst_inode = file_inode(dst_file); | |
2367 | struct ceph_inode_info *src_ci = ceph_inode(src_inode); | |
2368 | struct ceph_inode_info *dst_ci = ceph_inode(dst_inode); | |
2369 | struct ceph_cap_flush *prealloc_cf; | |
6fd4e634 | 2370 | struct ceph_fs_client *src_fsc = ceph_inode_to_client(src_inode); |
1b0c3b9f LH |
2371 | loff_t size; |
2372 | ssize_t ret = -EIO, bytes; | |
503f82a9 | 2373 | u64 src_objnum, dst_objnum, src_objoff, dst_objoff; |
1b0c3b9f | 2374 | u32 src_objlen, dst_objlen; |
503f82a9 | 2375 | int src_got = 0, dst_got = 0, err, dirty; |
503f82a9 | 2376 | |
6fd4e634 LH |
2377 | if (src_inode->i_sb != dst_inode->i_sb) { |
2378 | struct ceph_fs_client *dst_fsc = ceph_inode_to_client(dst_inode); | |
2379 | ||
2380 | if (ceph_fsid_compare(&src_fsc->client->fsid, | |
2381 | &dst_fsc->client->fsid)) { | |
2382 | dout("Copying files across clusters: src: %pU dst: %pU\n", | |
2383 | &src_fsc->client->fsid, &dst_fsc->client->fsid); | |
2384 | return -EXDEV; | |
2385 | } | |
2386 | } | |
503f82a9 LH |
2387 | if (ceph_snap(dst_inode) != CEPH_NOSNAP) |
2388 | return -EROFS; | |
2389 | ||
2390 | /* | |
2391 | * Some of the checks below will return -EOPNOTSUPP, which will force a | |
2392 | * fallback to the default VFS copy_file_range implementation. This is | |
2393 | * desirable in several cases (for ex, the 'len' is smaller than the | |
2394 | * size of the objects, or in cases where that would be more | |
2395 | * efficient). | |
2396 | */ | |
2397 | ||
6fd4e634 | 2398 | if (ceph_test_mount_opt(src_fsc, NOCOPYFROM)) |
ea4cdc54 LH |
2399 | return -EOPNOTSUPP; |
2400 | ||
78beb0ff LH |
2401 | if (!src_fsc->have_copy_from2) |
2402 | return -EOPNOTSUPP; | |
2403 | ||
a3a08193 LH |
2404 | /* |
2405 | * Striped file layouts require that we copy partial objects, but the | |
2406 | * OSD copy-from operation only supports full-object copies. Limit | |
2407 | * this to non-striped file layouts for now. | |
2408 | */ | |
503f82a9 | 2409 | if ((src_ci->i_layout.stripe_unit != dst_ci->i_layout.stripe_unit) || |
a3a08193 LH |
2410 | (src_ci->i_layout.stripe_count != 1) || |
2411 | (dst_ci->i_layout.stripe_count != 1) || | |
2412 | (src_ci->i_layout.object_size != dst_ci->i_layout.object_size)) { | |
2413 | dout("Invalid src/dst files layout\n"); | |
503f82a9 | 2414 | return -EOPNOTSUPP; |
a3a08193 | 2415 | } |
503f82a9 LH |
2416 | |
2417 | if (len < src_ci->i_layout.object_size) | |
2418 | return -EOPNOTSUPP; /* no remote copy will be done */ | |
2419 | ||
2420 | prealloc_cf = ceph_alloc_cap_flush(); | |
2421 | if (!prealloc_cf) | |
2422 | return -ENOMEM; | |
2423 | ||
c2c6d3ce | 2424 | /* Start by sync'ing the source and destination files */ |
503f82a9 | 2425 | ret = file_write_and_wait_range(src_file, src_off, (src_off + len)); |
c2c6d3ce LH |
2426 | if (ret < 0) { |
2427 | dout("failed to write src file (%zd)\n", ret); | |
2428 | goto out; | |
2429 | } | |
2430 | ret = file_write_and_wait_range(dst_file, dst_off, (dst_off + len)); | |
2431 | if (ret < 0) { | |
2432 | dout("failed to write dst file (%zd)\n", ret); | |
503f82a9 | 2433 | goto out; |
c2c6d3ce | 2434 | } |
503f82a9 LH |
2435 | |
2436 | /* | |
2437 | * We need FILE_WR caps for dst_ci and FILE_RD for src_ci as other | |
2438 | * clients may have dirty data in their caches. And OSDs know nothing | |
2439 | * about caps, so they can't safely do the remote object copies. | |
2440 | */ | |
5e3ded1b YZ |
2441 | err = get_rd_wr_caps(src_file, &src_got, |
2442 | dst_file, (dst_off + len), &dst_got); | |
503f82a9 LH |
2443 | if (err < 0) { |
2444 | dout("get_rd_wr_caps returned %d\n", err); | |
2445 | ret = -EOPNOTSUPP; | |
2446 | goto out; | |
2447 | } | |
2448 | ||
2449 | ret = is_file_size_ok(src_inode, dst_inode, src_off, dst_off, len); | |
2450 | if (ret < 0) | |
2451 | goto out_caps; | |
2452 | ||
503f82a9 | 2453 | /* Drop dst file cached pages */ |
400e1286 | 2454 | ceph_fscache_invalidate(dst_inode, false); |
503f82a9 LH |
2455 | ret = invalidate_inode_pages2_range(dst_inode->i_mapping, |
2456 | dst_off >> PAGE_SHIFT, | |
1b0c3b9f | 2457 | (dst_off + len) >> PAGE_SHIFT); |
503f82a9 LH |
2458 | if (ret < 0) { |
2459 | dout("Failed to invalidate inode pages (%zd)\n", ret); | |
2460 | ret = 0; /* XXX */ | |
2461 | } | |
503f82a9 LH |
2462 | ceph_calc_file_object_mapping(&src_ci->i_layout, src_off, |
2463 | src_ci->i_layout.object_size, | |
2464 | &src_objnum, &src_objoff, &src_objlen); | |
2465 | ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off, | |
2466 | dst_ci->i_layout.object_size, | |
2467 | &dst_objnum, &dst_objoff, &dst_objlen); | |
2468 | /* object-level offsets need to the same */ | |
2469 | if (src_objoff != dst_objoff) { | |
2470 | ret = -EOPNOTSUPP; | |
2471 | goto out_caps; | |
2472 | } | |
2473 | ||
2474 | /* | |
2475 | * Do a manual copy if the object offset isn't object aligned. | |
2476 | * 'src_objlen' contains the bytes left until the end of the object, | |
2477 | * starting at the src_off | |
2478 | */ | |
2479 | if (src_objoff) { | |
1b0c3b9f LH |
2480 | dout("Initial partial copy of %u bytes\n", src_objlen); |
2481 | ||
503f82a9 LH |
2482 | /* |
2483 | * we need to temporarily drop all caps as we'll be calling | |
2484 | * {read,write}_iter, which will get caps again. | |
2485 | */ | |
2486 | put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got); | |
2487 | ret = do_splice_direct(src_file, &src_off, dst_file, | |
2488 | &dst_off, src_objlen, flags); | |
1b0c3b9f LH |
2489 | /* Abort on short copies or on error */ |
2490 | if (ret < src_objlen) { | |
2491 | dout("Failed partial copy (%zd)\n", ret); | |
503f82a9 LH |
2492 | goto out; |
2493 | } | |
2494 | len -= ret; | |
5e3ded1b YZ |
2495 | err = get_rd_wr_caps(src_file, &src_got, |
2496 | dst_file, (dst_off + len), &dst_got); | |
503f82a9 LH |
2497 | if (err < 0) |
2498 | goto out; | |
2499 | err = is_file_size_ok(src_inode, dst_inode, | |
2500 | src_off, dst_off, len); | |
2501 | if (err < 0) | |
2502 | goto out_caps; | |
2503 | } | |
503f82a9 | 2504 | |
1b0c3b9f LH |
2505 | size = i_size_read(dst_inode); |
2506 | bytes = ceph_do_objects_copy(src_ci, &src_off, dst_ci, &dst_off, | |
2507 | src_fsc, len, flags); | |
2508 | if (bytes <= 0) { | |
2509 | if (!ret) | |
2510 | ret = bytes; | |
2511 | goto out_caps; | |
2512 | } | |
2513 | dout("Copied %zu bytes out of %zu\n", bytes, len); | |
2514 | len -= bytes; | |
2515 | ret += bytes; | |
503f82a9 LH |
2516 | |
2517 | file_update_time(dst_file); | |
5c308356 JL |
2518 | inode_inc_iversion_raw(dst_inode); |
2519 | ||
1b0c3b9f | 2520 | if (dst_off > size) { |
503f82a9 | 2521 | /* Let the MDS know about dst file size change */ |
a0d93e32 YZ |
2522 | if (ceph_inode_set_size(dst_inode, dst_off) || |
2523 | ceph_quota_is_max_bytes_approaching(dst_inode, dst_off)) | |
e027ddb6 XL |
2524 | ceph_check_caps(dst_ci, CHECK_CAPS_AUTHONLY | CHECK_CAPS_FLUSH, |
2525 | NULL); | |
503f82a9 LH |
2526 | } |
2527 | /* Mark Fw dirty */ | |
2528 | spin_lock(&dst_ci->i_ceph_lock); | |
503f82a9 LH |
2529 | dirty = __ceph_mark_dirty_caps(dst_ci, CEPH_CAP_FILE_WR, &prealloc_cf); |
2530 | spin_unlock(&dst_ci->i_ceph_lock); | |
2531 | if (dirty) | |
2532 | __mark_inode_dirty(dst_inode, dirty); | |
2533 | ||
2534 | out_caps: | |
2535 | put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got); | |
2536 | ||
1b0c3b9f LH |
2537 | /* |
2538 | * Do the final manual copy if we still have some bytes left, unless | |
2539 | * there were errors in remote object copies (len >= object_size). | |
2540 | */ | |
2541 | if (len && (len < src_ci->i_layout.object_size)) { | |
2542 | dout("Final partial copy of %zu bytes\n", len); | |
2543 | bytes = do_splice_direct(src_file, &src_off, dst_file, | |
2544 | &dst_off, len, flags); | |
2545 | if (bytes > 0) | |
2546 | ret += bytes; | |
2547 | else | |
2548 | dout("Failed partial copy (%zd)\n", bytes); | |
503f82a9 LH |
2549 | } |
2550 | ||
2551 | out: | |
2552 | ceph_free_cap_flush(prealloc_cf); | |
2553 | ||
2554 | return ret; | |
2555 | } | |
2556 | ||
64bf5ff5 DC |
2557 | static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off, |
2558 | struct file *dst_file, loff_t dst_off, | |
2559 | size_t len, unsigned int flags) | |
2560 | { | |
2561 | ssize_t ret; | |
2562 | ||
2563 | ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off, | |
2564 | len, flags); | |
2565 | ||
5dae222a | 2566 | if (ret == -EOPNOTSUPP || ret == -EXDEV) |
64bf5ff5 DC |
2567 | ret = generic_copy_file_range(src_file, src_off, dst_file, |
2568 | dst_off, len, flags); | |
2569 | return ret; | |
2570 | } | |
2571 | ||
124e68e7 SW |
2572 | const struct file_operations ceph_file_fops = { |
2573 | .open = ceph_open, | |
2574 | .release = ceph_release, | |
2575 | .llseek = ceph_llseek, | |
3644424d | 2576 | .read_iter = ceph_read_iter, |
4908b822 | 2577 | .write_iter = ceph_write_iter, |
124e68e7 SW |
2578 | .mmap = ceph_mmap, |
2579 | .fsync = ceph_fsync, | |
40819f6f | 2580 | .lock = ceph_lock, |
496ceaf1 | 2581 | .setlease = simple_nosetlease, |
40819f6f | 2582 | .flock = ceph_flock, |
7ce469a5 | 2583 | .splice_read = generic_file_splice_read, |
3551dd79 | 2584 | .splice_write = iter_file_splice_write, |
124e68e7 | 2585 | .unlocked_ioctl = ceph_ioctl, |
18bd6caa | 2586 | .compat_ioctl = compat_ptr_ioctl, |
ad7a60de | 2587 | .fallocate = ceph_fallocate, |
503f82a9 | 2588 | .copy_file_range = ceph_copy_file_range, |
124e68e7 | 2589 | }; |