Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
503f82a9 | 3 | #include <linux/ceph/striper.h> |
124e68e7 | 4 | |
3d14c5d2 | 5 | #include <linux/module.h> |
124e68e7 | 6 | #include <linux/sched.h> |
5a0e3ad6 | 7 | #include <linux/slab.h> |
124e68e7 | 8 | #include <linux/file.h> |
5ef50c3b | 9 | #include <linux/mount.h> |
124e68e7 SW |
10 | #include <linux/namei.h> |
11 | #include <linux/writeback.h> | |
ad7a60de | 12 | #include <linux/falloc.h> |
5c308356 | 13 | #include <linux/iversion.h> |
97e27aaa | 14 | #include <linux/ktime.h> |
124e68e7 SW |
15 | |
16 | #include "super.h" | |
17 | #include "mds_client.h" | |
99ccbd22 | 18 | #include "cache.h" |
321fe13c | 19 | #include "io.h" |
97e27aaa | 20 | #include "metric.h" |
124e68e7 | 21 | |
f775ff7d AG |
22 | static __le32 ceph_flags_sys2wire(u32 flags) |
23 | { | |
24 | u32 wire_flags = 0; | |
25 | ||
26 | switch (flags & O_ACCMODE) { | |
27 | case O_RDONLY: | |
28 | wire_flags |= CEPH_O_RDONLY; | |
29 | break; | |
30 | case O_WRONLY: | |
31 | wire_flags |= CEPH_O_WRONLY; | |
32 | break; | |
33 | case O_RDWR: | |
34 | wire_flags |= CEPH_O_RDWR; | |
35 | break; | |
36 | } | |
37 | ||
51b10f3f CX |
38 | flags &= ~O_ACCMODE; |
39 | ||
f775ff7d AG |
40 | #define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; } |
41 | ||
42 | ceph_sys2wire(O_CREAT); | |
43 | ceph_sys2wire(O_EXCL); | |
44 | ceph_sys2wire(O_TRUNC); | |
45 | ceph_sys2wire(O_DIRECTORY); | |
46 | ceph_sys2wire(O_NOFOLLOW); | |
47 | ||
48 | #undef ceph_sys2wire | |
49 | ||
50 | if (flags) | |
4c069a58 | 51 | dout("unused open flags: %x\n", flags); |
f775ff7d AG |
52 | |
53 | return cpu_to_le32(wire_flags); | |
54 | } | |
55 | ||
124e68e7 SW |
56 | /* |
57 | * Ceph file operations | |
58 | * | |
59 | * Implement basic open/close functionality, and implement | |
60 | * read/write. | |
61 | * | |
62 | * We implement three modes of file I/O: | |
63 | * - buffered uses the generic_file_aio_{read,write} helpers | |
64 | * | |
65 | * - synchronous is used when there is multi-client read/write | |
66 | * sharing, avoids the page cache, and synchronously waits for an | |
67 | * ack from the OSD. | |
68 | * | |
69 | * - direct io takes the variant of the sync path that references | |
70 | * user pages directly. | |
71 | * | |
72 | * fsync() flushes and waits on dirty pages, but just queues metadata | |
73 | * for writeback: since the MDS can recover size and mtime there is no | |
74 | * need to wait for MDS acknowledgement. | |
75 | */ | |
76 | ||
b5b98989 | 77 | /* |
fc218544 ID |
78 | * How many pages to get in one call to iov_iter_get_pages(). This |
79 | * determines the size of the on-stack array used as a buffer. | |
b5b98989 | 80 | */ |
fc218544 ID |
81 | #define ITER_GET_BVECS_PAGES 64 |
82 | ||
83 | static ssize_t __iter_get_bvecs(struct iov_iter *iter, size_t maxsize, | |
84 | struct bio_vec *bvecs) | |
b5b98989 | 85 | { |
fc218544 ID |
86 | size_t size = 0; |
87 | int bvec_idx = 0; | |
88 | ||
89 | if (maxsize > iov_iter_count(iter)) | |
90 | maxsize = iov_iter_count(iter); | |
91 | ||
92 | while (size < maxsize) { | |
93 | struct page *pages[ITER_GET_BVECS_PAGES]; | |
94 | ssize_t bytes; | |
95 | size_t start; | |
96 | int idx = 0; | |
97 | ||
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++) { | |
5c6542b6 CH |
106 | int len = min_t(int, bytes, PAGE_SIZE - start); |
107 | ||
108 | bvec_set_page(&bvecs[bvec_idx], pages[idx], len, start); | |
109 | bytes -= len; | |
fc218544 ID |
110 | start = 0; |
111 | } | |
112 | } | |
113 | ||
114 | return size; | |
b5b98989 ZC |
115 | } |
116 | ||
117 | /* | |
fc218544 ID |
118 | * iov_iter_get_pages() only considers one iov_iter segment, no matter |
119 | * what maxsize or maxpages are given. For ITER_BVEC that is a single | |
120 | * page. | |
121 | * | |
122 | * Attempt to get up to @maxsize bytes worth of pages from @iter. | |
123 | * Return the number of bytes in the created bio_vec array, or an error. | |
b5b98989 | 124 | */ |
fc218544 ID |
125 | static ssize_t iter_get_bvecs_alloc(struct iov_iter *iter, size_t maxsize, |
126 | struct bio_vec **bvecs, int *num_bvecs) | |
b5b98989 | 127 | { |
fc218544 ID |
128 | struct bio_vec *bv; |
129 | size_t orig_count = iov_iter_count(iter); | |
130 | ssize_t bytes; | |
131 | int npages; | |
b5b98989 | 132 | |
fc218544 ID |
133 | iov_iter_truncate(iter, maxsize); |
134 | npages = iov_iter_npages(iter, INT_MAX); | |
135 | iov_iter_reexpand(iter, orig_count); | |
b5b98989 | 136 | |
fc218544 ID |
137 | /* |
138 | * __iter_get_bvecs() may populate only part of the array -- zero it | |
139 | * out. | |
140 | */ | |
141 | bv = kvmalloc_array(npages, sizeof(*bv), GFP_KERNEL | __GFP_ZERO); | |
142 | if (!bv) | |
143 | return -ENOMEM; | |
b5b98989 | 144 | |
fc218544 ID |
145 | bytes = __iter_get_bvecs(iter, maxsize, bv); |
146 | if (bytes < 0) { | |
147 | /* | |
148 | * No pages were pinned -- just free the array. | |
149 | */ | |
150 | kvfree(bv); | |
151 | return bytes; | |
b5b98989 ZC |
152 | } |
153 | ||
fc218544 ID |
154 | *bvecs = bv; |
155 | *num_bvecs = npages; | |
156 | return bytes; | |
157 | } | |
158 | ||
159 | static void put_bvecs(struct bio_vec *bvecs, int num_bvecs, bool should_dirty) | |
160 | { | |
161 | int i; | |
162 | ||
163 | for (i = 0; i < num_bvecs; i++) { | |
164 | if (bvecs[i].bv_page) { | |
165 | if (should_dirty) | |
166 | set_page_dirty_lock(bvecs[i].bv_page); | |
167 | put_page(bvecs[i].bv_page); | |
168 | } | |
169 | } | |
170 | kvfree(bvecs); | |
b5b98989 | 171 | } |
124e68e7 SW |
172 | |
173 | /* | |
174 | * Prepare an open request. Preallocate ceph_cap to avoid an | |
175 | * inopportune ENOMEM later. | |
176 | */ | |
177 | static struct ceph_mds_request * | |
178 | prepare_open_request(struct super_block *sb, int flags, int create_mode) | |
179 | { | |
2678da88 | 180 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb); |
124e68e7 SW |
181 | struct ceph_mds_request *req; |
182 | int want_auth = USE_ANY_MDS; | |
183 | int op = (flags & O_CREAT) ? CEPH_MDS_OP_CREATE : CEPH_MDS_OP_OPEN; | |
184 | ||
185 | if (flags & (O_WRONLY|O_RDWR|O_CREAT|O_TRUNC)) | |
186 | want_auth = USE_AUTH_MDS; | |
187 | ||
188 | req = ceph_mdsc_create_request(mdsc, op, want_auth); | |
189 | if (IS_ERR(req)) | |
190 | goto out; | |
191 | req->r_fmode = ceph_flags_to_mode(flags); | |
f775ff7d | 192 | req->r_args.open.flags = ceph_flags_sys2wire(flags); |
124e68e7 | 193 | req->r_args.open.mode = cpu_to_le32(create_mode); |
124e68e7 SW |
194 | out: |
195 | return req; | |
196 | } | |
197 | ||
bb48bd4d CX |
198 | static int ceph_init_file_info(struct inode *inode, struct file *file, |
199 | int fmode, bool isdir) | |
200 | { | |
f4b97866 | 201 | struct ceph_inode_info *ci = ceph_inode(inode); |
94cc0877 | 202 | struct ceph_mount_options *opt = |
874c8ca1 | 203 | ceph_inode_to_client(&ci->netfs.inode)->mount_options; |
bb48bd4d | 204 | struct ceph_file_info *fi; |
083db6fd | 205 | int ret; |
bb48bd4d CX |
206 | |
207 | dout("%s %p %p 0%o (%s)\n", __func__, inode, file, | |
208 | inode->i_mode, isdir ? "dir" : "regular"); | |
209 | BUG_ON(inode->i_fop->release != ceph_release); | |
210 | ||
211 | if (isdir) { | |
212 | struct ceph_dir_file_info *dfi = | |
213 | kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL); | |
135e671e | 214 | if (!dfi) |
bb48bd4d | 215 | return -ENOMEM; |
bb48bd4d CX |
216 | |
217 | file->private_data = dfi; | |
218 | fi = &dfi->file_info; | |
219 | dfi->next_offset = 2; | |
220 | dfi->readdir_cache_idx = -1; | |
221 | } else { | |
222 | fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL); | |
135e671e | 223 | if (!fi) |
bb48bd4d | 224 | return -ENOMEM; |
bb48bd4d | 225 | |
94cc0877 JL |
226 | if (opt->flags & CEPH_MOUNT_OPT_NOPAGECACHE) |
227 | fi->flags |= CEPH_F_SYNC; | |
228 | ||
bb48bd4d CX |
229 | file->private_data = fi; |
230 | } | |
231 | ||
135e671e | 232 | ceph_get_fmode(ci, fmode, 1); |
bb48bd4d | 233 | fi->fmode = fmode; |
135e671e | 234 | |
bb48bd4d CX |
235 | spin_lock_init(&fi->rw_contexts_lock); |
236 | INIT_LIST_HEAD(&fi->rw_contexts); | |
81f148a9 | 237 | fi->filp_gen = READ_ONCE(ceph_inode_to_client(inode)->filp_gen); |
bb48bd4d | 238 | |
48490776 | 239 | if ((file->f_mode & FMODE_WRITE) && ceph_has_inline_data(ci)) { |
083db6fd DH |
240 | ret = ceph_uninline_data(file); |
241 | if (ret < 0) | |
242 | goto error; | |
243 | } | |
244 | ||
bb48bd4d | 245 | return 0; |
083db6fd DH |
246 | |
247 | error: | |
248 | ceph_fscache_unuse_cookie(inode, file->f_mode & FMODE_WRITE); | |
249 | ceph_put_fmode(ci, fi->fmode, 1); | |
250 | kmem_cache_free(ceph_file_cachep, fi); | |
251 | /* wake up anyone waiting for caps on this inode */ | |
252 | wake_up_all(&ci->i_cap_wq); | |
253 | return ret; | |
bb48bd4d CX |
254 | } |
255 | ||
124e68e7 SW |
256 | /* |
257 | * initialize private struct file data. | |
258 | * if we fail, clean up by dropping fmode reference on the ceph_inode | |
259 | */ | |
260 | static int ceph_init_file(struct inode *inode, struct file *file, int fmode) | |
261 | { | |
124e68e7 SW |
262 | int ret = 0; |
263 | ||
264 | switch (inode->i_mode & S_IFMT) { | |
265 | case S_IFREG: | |
400e1286 | 266 | ceph_fscache_use_cookie(inode, file->f_mode & FMODE_WRITE); |
df561f66 | 267 | fallthrough; |
124e68e7 | 268 | case S_IFDIR: |
bb48bd4d CX |
269 | ret = ceph_init_file_info(inode, file, fmode, |
270 | S_ISDIR(inode->i_mode)); | |
124e68e7 SW |
271 | break; |
272 | ||
273 | case S_IFLNK: | |
274 | dout("init_file %p %p 0%o (symlink)\n", inode, file, | |
275 | inode->i_mode); | |
124e68e7 SW |
276 | break; |
277 | ||
278 | default: | |
279 | dout("init_file %p %p 0%o (special)\n", inode, file, | |
280 | inode->i_mode); | |
281 | /* | |
282 | * we need to drop the open ref now, since we don't | |
283 | * have .release set to ceph_release. | |
284 | */ | |
124e68e7 SW |
285 | BUG_ON(inode->i_fop->release == ceph_release); |
286 | ||
287 | /* call the proper open fop */ | |
288 | ret = inode->i_fop->open(inode, file); | |
289 | } | |
290 | return ret; | |
291 | } | |
292 | ||
77310320 YZ |
293 | /* |
294 | * try renew caps after session gets killed. | |
295 | */ | |
719a2514 | 296 | int ceph_renew_caps(struct inode *inode, int fmode) |
77310320 | 297 | { |
2678da88 | 298 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); |
77310320 YZ |
299 | struct ceph_inode_info *ci = ceph_inode(inode); |
300 | struct ceph_mds_request *req; | |
301 | int err, flags, wanted; | |
302 | ||
303 | spin_lock(&ci->i_ceph_lock); | |
719a2514 | 304 | __ceph_touch_fmode(ci, mdsc, fmode); |
77310320 YZ |
305 | wanted = __ceph_caps_file_wanted(ci); |
306 | if (__ceph_is_any_real_caps(ci) && | |
8242c9f3 | 307 | (!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) { |
77310320 YZ |
308 | int issued = __ceph_caps_issued(ci, NULL); |
309 | spin_unlock(&ci->i_ceph_lock); | |
310 | dout("renew caps %p want %s issued %s updating mds_wanted\n", | |
311 | inode, ceph_cap_string(wanted), ceph_cap_string(issued)); | |
e4b731cc | 312 | ceph_check_caps(ci, 0); |
77310320 YZ |
313 | return 0; |
314 | } | |
315 | spin_unlock(&ci->i_ceph_lock); | |
316 | ||
317 | flags = 0; | |
318 | if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR)) | |
319 | flags = O_RDWR; | |
320 | else if (wanted & CEPH_CAP_FILE_RD) | |
321 | flags = O_RDONLY; | |
322 | else if (wanted & CEPH_CAP_FILE_WR) | |
323 | flags = O_WRONLY; | |
324 | #ifdef O_LAZY | |
325 | if (wanted & CEPH_CAP_FILE_LAZYIO) | |
326 | flags |= O_LAZY; | |
327 | #endif | |
328 | ||
329 | req = prepare_open_request(inode->i_sb, flags, 0); | |
330 | if (IS_ERR(req)) { | |
331 | err = PTR_ERR(req); | |
332 | goto out; | |
333 | } | |
334 | ||
335 | req->r_inode = inode; | |
336 | ihold(inode); | |
337 | req->r_num_caps = 1; | |
77310320 YZ |
338 | |
339 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
340 | ceph_mdsc_put_request(req); | |
341 | out: | |
342 | dout("renew caps %p open result=%d\n", inode, err); | |
343 | return err < 0 ? err : 0; | |
344 | } | |
345 | ||
124e68e7 | 346 | /* |
124e68e7 SW |
347 | * If we already have the requisite capabilities, we can satisfy |
348 | * the open request locally (no need to request new caps from the | |
349 | * MDS). We do, however, need to inform the MDS (asynchronously) | |
350 | * if our wanted caps set expands. | |
351 | */ | |
352 | int ceph_open(struct inode *inode, struct file *file) | |
353 | { | |
354 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3d14c5d2 YS |
355 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
356 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
124e68e7 | 357 | struct ceph_mds_request *req; |
73737682 | 358 | struct ceph_file_info *fi = file->private_data; |
124e68e7 SW |
359 | int err; |
360 | int flags, fmode, wanted; | |
361 | ||
73737682 | 362 | if (fi) { |
124e68e7 SW |
363 | dout("open file %p is already opened\n", file); |
364 | return 0; | |
365 | } | |
366 | ||
367 | /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */ | |
368 | flags = file->f_flags & ~(O_CREAT|O_EXCL); | |
369 | if (S_ISDIR(inode->i_mode)) | |
370 | flags = O_DIRECTORY; /* mds likes to know */ | |
371 | ||
372 | dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode, | |
373 | ceph_vinop(inode), file, flags, file->f_flags); | |
374 | fmode = ceph_flags_to_mode(flags); | |
375 | wanted = ceph_caps_for_mode(fmode); | |
376 | ||
377 | /* snapped files are read-only */ | |
378 | if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE)) | |
379 | return -EROFS; | |
380 | ||
381 | /* trivially open snapdir */ | |
382 | if (ceph_snap(inode) == CEPH_SNAPDIR) { | |
124e68e7 SW |
383 | return ceph_init_file(inode, file, fmode); |
384 | } | |
385 | ||
386 | /* | |
7421ab80 SW |
387 | * No need to block if we have caps on the auth MDS (for |
388 | * write) or any MDS (for read). Update wanted set | |
124e68e7 SW |
389 | * asynchronously. |
390 | */ | |
be655596 | 391 | spin_lock(&ci->i_ceph_lock); |
7421ab80 SW |
392 | if (__ceph_is_any_real_caps(ci) && |
393 | (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) { | |
c1944fed | 394 | int mds_wanted = __ceph_caps_mds_wanted(ci, true); |
124e68e7 SW |
395 | int issued = __ceph_caps_issued(ci, NULL); |
396 | ||
397 | dout("open %p fmode %d want %s issued %s using existing\n", | |
398 | inode, fmode, ceph_cap_string(wanted), | |
399 | ceph_cap_string(issued)); | |
135e671e | 400 | __ceph_touch_fmode(ci, mdsc, fmode); |
be655596 | 401 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
402 | |
403 | /* adjust wanted? */ | |
404 | if ((issued & wanted) != wanted && | |
405 | (mds_wanted & wanted) != wanted && | |
406 | ceph_snap(inode) != CEPH_SNAPDIR) | |
e4b731cc | 407 | ceph_check_caps(ci, 0); |
124e68e7 SW |
408 | |
409 | return ceph_init_file(inode, file, fmode); | |
410 | } else if (ceph_snap(inode) != CEPH_NOSNAP && | |
411 | (ci->i_snap_caps & wanted) == wanted) { | |
719a2514 | 412 | __ceph_touch_fmode(ci, mdsc, fmode); |
be655596 | 413 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
414 | return ceph_init_file(inode, file, fmode); |
415 | } | |
99ccbd22 | 416 | |
be655596 | 417 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
418 | |
419 | dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted)); | |
420 | req = prepare_open_request(inode->i_sb, flags, 0); | |
421 | if (IS_ERR(req)) { | |
422 | err = PTR_ERR(req); | |
423 | goto out; | |
424 | } | |
70b666c3 SW |
425 | req->r_inode = inode; |
426 | ihold(inode); | |
99ccbd22 | 427 | |
124e68e7 | 428 | req->r_num_caps = 1; |
e36d571d | 429 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
124e68e7 SW |
430 | if (!err) |
431 | err = ceph_init_file(inode, file, req->r_fmode); | |
432 | ceph_mdsc_put_request(req); | |
433 | dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode)); | |
434 | out: | |
435 | return err; | |
436 | } | |
437 | ||
785892fe JL |
438 | /* Clone the layout from a synchronous create, if the dir now has Dc caps */ |
439 | static void | |
440 | cache_file_layout(struct inode *dst, struct inode *src) | |
441 | { | |
442 | struct ceph_inode_info *cdst = ceph_inode(dst); | |
443 | struct ceph_inode_info *csrc = ceph_inode(src); | |
444 | ||
445 | spin_lock(&cdst->i_ceph_lock); | |
446 | if ((__ceph_caps_issued(cdst, NULL) & CEPH_CAP_DIR_CREATE) && | |
447 | !ceph_file_layout_is_valid(&cdst->i_cached_layout)) { | |
448 | memcpy(&cdst->i_cached_layout, &csrc->i_layout, | |
449 | sizeof(cdst->i_cached_layout)); | |
450 | rcu_assign_pointer(cdst->i_cached_layout.pool_ns, | |
451 | ceph_try_get_string(csrc->i_layout.pool_ns)); | |
452 | } | |
453 | spin_unlock(&cdst->i_ceph_lock); | |
454 | } | |
124e68e7 | 455 | |
9a8d03ca JL |
456 | /* |
457 | * Try to set up an async create. We need caps, a file layout, and inode number, | |
458 | * and either a lease on the dentry or complete dir info. If any of those | |
459 | * criteria are not satisfied, then return false and the caller can go | |
460 | * synchronous. | |
461 | */ | |
462 | static int try_prep_async_create(struct inode *dir, struct dentry *dentry, | |
463 | struct ceph_file_layout *lo, u64 *pino) | |
464 | { | |
465 | struct ceph_inode_info *ci = ceph_inode(dir); | |
466 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
467 | int got = 0, want = CEPH_CAP_FILE_EXCL | CEPH_CAP_DIR_CREATE; | |
468 | u64 ino; | |
469 | ||
470 | spin_lock(&ci->i_ceph_lock); | |
471 | /* No auth cap means no chance for Dc caps */ | |
472 | if (!ci->i_auth_cap) | |
473 | goto no_async; | |
474 | ||
475 | /* Any delegated inos? */ | |
476 | if (xa_empty(&ci->i_auth_cap->session->s_delegated_inos)) | |
477 | goto no_async; | |
478 | ||
479 | if (!ceph_file_layout_is_valid(&ci->i_cached_layout)) | |
480 | goto no_async; | |
481 | ||
482 | if ((__ceph_caps_issued(ci, NULL) & want) != want) | |
483 | goto no_async; | |
484 | ||
485 | if (d_in_lookup(dentry)) { | |
486 | if (!__ceph_dir_is_complete(ci)) | |
487 | goto no_async; | |
3313f66a YZ |
488 | spin_lock(&dentry->d_lock); |
489 | di->lease_shared_gen = atomic_read(&ci->i_shared_gen); | |
490 | spin_unlock(&dentry->d_lock); | |
9a8d03ca JL |
491 | } else if (atomic_read(&ci->i_shared_gen) != |
492 | READ_ONCE(di->lease_shared_gen)) { | |
493 | goto no_async; | |
494 | } | |
495 | ||
496 | ino = ceph_get_deleg_ino(ci->i_auth_cap->session); | |
497 | if (!ino) | |
498 | goto no_async; | |
499 | ||
500 | *pino = ino; | |
501 | ceph_take_cap_refs(ci, want, false); | |
502 | memcpy(lo, &ci->i_cached_layout, sizeof(*lo)); | |
503 | rcu_assign_pointer(lo->pool_ns, | |
504 | ceph_try_get_string(ci->i_cached_layout.pool_ns)); | |
505 | got = want; | |
506 | no_async: | |
507 | spin_unlock(&ci->i_ceph_lock); | |
508 | return got; | |
509 | } | |
510 | ||
511 | static void restore_deleg_ino(struct inode *dir, u64 ino) | |
512 | { | |
513 | struct ceph_inode_info *ci = ceph_inode(dir); | |
514 | struct ceph_mds_session *s = NULL; | |
515 | ||
516 | spin_lock(&ci->i_ceph_lock); | |
517 | if (ci->i_auth_cap) | |
518 | s = ceph_get_mds_session(ci->i_auth_cap->session); | |
519 | spin_unlock(&ci->i_ceph_lock); | |
520 | if (s) { | |
521 | int err = ceph_restore_deleg_ino(s, ino); | |
522 | if (err) | |
523 | pr_warn("ceph: unable to restore delegated ino 0x%llx to session: %d\n", | |
524 | ino, err); | |
525 | ceph_put_mds_session(s); | |
526 | } | |
527 | } | |
528 | ||
4d9513cf JL |
529 | static void wake_async_create_waiters(struct inode *inode, |
530 | struct ceph_mds_session *session) | |
531 | { | |
532 | struct ceph_inode_info *ci = ceph_inode(inode); | |
68c62bee | 533 | bool check_cap = false; |
4d9513cf JL |
534 | |
535 | spin_lock(&ci->i_ceph_lock); | |
536 | if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE) { | |
537 | ci->i_ceph_flags &= ~CEPH_I_ASYNC_CREATE; | |
538 | wake_up_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT); | |
68c62bee XL |
539 | |
540 | if (ci->i_ceph_flags & CEPH_I_ASYNC_CHECK_CAPS) { | |
541 | ci->i_ceph_flags &= ~CEPH_I_ASYNC_CHECK_CAPS; | |
542 | check_cap = true; | |
543 | } | |
4d9513cf JL |
544 | } |
545 | ceph_kick_flushing_inode_caps(session, ci); | |
546 | spin_unlock(&ci->i_ceph_lock); | |
68c62bee XL |
547 | |
548 | if (check_cap) | |
549 | ceph_check_caps(ci, CHECK_CAPS_FLUSH); | |
4d9513cf JL |
550 | } |
551 | ||
9a8d03ca JL |
552 | static void ceph_async_create_cb(struct ceph_mds_client *mdsc, |
553 | struct ceph_mds_request *req) | |
554 | { | |
4d9513cf JL |
555 | struct dentry *dentry = req->r_dentry; |
556 | struct inode *dinode = d_inode(dentry); | |
557 | struct inode *tinode = req->r_target_inode; | |
9a8d03ca JL |
558 | int result = req->r_err ? req->r_err : |
559 | le32_to_cpu(req->r_reply_info.head->result); | |
560 | ||
4d9513cf JL |
561 | WARN_ON_ONCE(dinode && tinode && dinode != tinode); |
562 | ||
563 | /* MDS changed -- caller must resubmit */ | |
9a8d03ca JL |
564 | if (result == -EJUKEBOX) |
565 | goto out; | |
566 | ||
567 | mapping_set_error(req->r_parent->i_mapping, result); | |
568 | ||
569 | if (result) { | |
2a575f13 JL |
570 | int pathlen = 0; |
571 | u64 base = 0; | |
9a8d03ca JL |
572 | char *path = ceph_mdsc_build_path(req->r_dentry, &pathlen, |
573 | &base, 0); | |
574 | ||
4868e537 | 575 | pr_warn("async create failure path=(%llx)%s result=%d!\n", |
4d9513cf JL |
576 | base, IS_ERR(path) ? "<<bad>>" : path, result); |
577 | ceph_mdsc_free_path(path, pathlen); | |
578 | ||
9a8d03ca JL |
579 | ceph_dir_clear_complete(req->r_parent); |
580 | if (!d_unhashed(dentry)) | |
581 | d_drop(dentry); | |
582 | ||
4d9513cf JL |
583 | if (dinode) { |
584 | mapping_set_error(dinode->i_mapping, result); | |
585 | ceph_inode_shutdown(dinode); | |
586 | wake_async_create_waiters(dinode, req->r_session); | |
587 | } | |
9a8d03ca JL |
588 | } |
589 | ||
4d9513cf JL |
590 | if (tinode) { |
591 | u64 ino = ceph_vino(tinode).ino; | |
9a8d03ca JL |
592 | |
593 | if (req->r_deleg_ino != ino) | |
594 | pr_warn("%s: inode number mismatch! err=%d deleg_ino=0x%llx target=0x%llx\n", | |
595 | __func__, req->r_err, req->r_deleg_ino, ino); | |
9a8d03ca | 596 | |
4d9513cf JL |
597 | mapping_set_error(tinode->i_mapping, result); |
598 | wake_async_create_waiters(tinode, req->r_session); | |
6407fbb9 | 599 | } else if (!result) { |
9a8d03ca JL |
600 | pr_warn("%s: no req->r_target_inode for 0x%llx\n", __func__, |
601 | req->r_deleg_ino); | |
602 | } | |
603 | out: | |
604 | ceph_mdsc_release_dir_caps(req); | |
605 | } | |
606 | ||
607 | static int ceph_finish_async_create(struct inode *dir, struct dentry *dentry, | |
608 | struct file *file, umode_t mode, | |
609 | struct ceph_mds_request *req, | |
610 | struct ceph_acl_sec_ctx *as_ctx, | |
611 | struct ceph_file_layout *lo) | |
612 | { | |
613 | int ret; | |
614 | char xattr_buf[4]; | |
615 | struct ceph_mds_reply_inode in = { }; | |
616 | struct ceph_mds_reply_info_in iinfo = { .in = &in }; | |
617 | struct ceph_inode_info *ci = ceph_inode(dir); | |
00061645 | 618 | struct ceph_dentry_info *di = ceph_dentry(dentry); |
9a8d03ca JL |
619 | struct inode *inode; |
620 | struct timespec64 now; | |
4584a768 | 621 | struct ceph_string *pool_ns; |
27171ae6 | 622 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(dir->i_sb); |
9a8d03ca JL |
623 | struct ceph_vino vino = { .ino = req->r_deleg_ino, |
624 | .snap = CEPH_NOSNAP }; | |
625 | ||
626 | ktime_get_real_ts64(&now); | |
627 | ||
628 | inode = ceph_get_inode(dentry->d_sb, vino); | |
629 | if (IS_ERR(inode)) | |
630 | return PTR_ERR(inode); | |
631 | ||
632 | iinfo.inline_version = CEPH_INLINE_NONE; | |
633 | iinfo.change_attr = 1; | |
634 | ceph_encode_timespec64(&iinfo.btime, &now); | |
635 | ||
620239d9 JL |
636 | if (req->r_pagelist) { |
637 | iinfo.xattr_len = req->r_pagelist->length; | |
638 | iinfo.xattr_data = req->r_pagelist->mapped_tail; | |
639 | } else { | |
640 | /* fake it */ | |
641 | iinfo.xattr_len = ARRAY_SIZE(xattr_buf); | |
642 | iinfo.xattr_data = xattr_buf; | |
643 | memset(iinfo.xattr_data, 0, iinfo.xattr_len); | |
644 | } | |
9a8d03ca JL |
645 | |
646 | in.ino = cpu_to_le64(vino.ino); | |
647 | in.snapid = cpu_to_le64(CEPH_NOSNAP); | |
648 | in.version = cpu_to_le64(1); // ??? | |
649 | in.cap.caps = in.cap.wanted = cpu_to_le32(CEPH_CAP_ALL_FILE); | |
650 | in.cap.cap_id = cpu_to_le64(1); | |
651 | in.cap.realm = cpu_to_le64(ci->i_snap_realm->ino); | |
652 | in.cap.flags = CEPH_CAP_FLAG_AUTH; | |
653 | in.ctime = in.mtime = in.atime = iinfo.btime; | |
9a8d03ca JL |
654 | in.truncate_seq = cpu_to_le32(1); |
655 | in.truncate_size = cpu_to_le64(-1ULL); | |
656 | in.xattr_version = cpu_to_le64(1); | |
657 | in.uid = cpu_to_le32(from_kuid(&init_user_ns, current_fsuid())); | |
fd84bfdd CB |
658 | if (dir->i_mode & S_ISGID) { |
659 | in.gid = cpu_to_le32(from_kgid(&init_user_ns, dir->i_gid)); | |
660 | ||
661 | /* Directories always inherit the setgid bit. */ | |
662 | if (S_ISDIR(mode)) | |
663 | mode |= S_ISGID; | |
fd84bfdd CB |
664 | } else { |
665 | in.gid = cpu_to_le32(from_kgid(&init_user_ns, current_fsgid())); | |
666 | } | |
667 | in.mode = cpu_to_le32((u32)mode); | |
668 | ||
9a8d03ca JL |
669 | in.nlink = cpu_to_le32(1); |
670 | in.max_size = cpu_to_le64(lo->stripe_unit); | |
671 | ||
672 | ceph_file_layout_to_legacy(lo, &in.layout); | |
4584a768 JL |
673 | /* lo is private, so pool_ns can't change */ |
674 | pool_ns = rcu_dereference_raw(lo->pool_ns); | |
675 | if (pool_ns) { | |
676 | iinfo.pool_ns_len = pool_ns->len; | |
677 | iinfo.pool_ns_data = pool_ns->str; | |
678 | } | |
9a8d03ca | 679 | |
27171ae6 | 680 | down_read(&mdsc->snap_rwsem); |
9a8d03ca JL |
681 | ret = ceph_fill_inode(inode, NULL, &iinfo, NULL, req->r_session, |
682 | req->r_fmode, NULL); | |
27171ae6 | 683 | up_read(&mdsc->snap_rwsem); |
9a8d03ca JL |
684 | if (ret) { |
685 | dout("%s failed to fill inode: %d\n", __func__, ret); | |
686 | ceph_dir_clear_complete(dir); | |
687 | if (!d_unhashed(dentry)) | |
688 | d_drop(dentry); | |
689 | if (inode->i_state & I_NEW) | |
690 | discard_new_inode(inode); | |
691 | } else { | |
692 | struct dentry *dn; | |
693 | ||
ebce3eb2 JL |
694 | dout("%s d_adding new inode 0x%llx to 0x%llx/%s\n", __func__, |
695 | vino.ino, ceph_ino(dir), dentry->d_name.name); | |
9a8d03ca JL |
696 | ceph_dir_clear_ordered(dir); |
697 | ceph_init_inode_acls(inode, as_ctx); | |
698 | if (inode->i_state & I_NEW) { | |
699 | /* | |
700 | * If it's not I_NEW, then someone created this before | |
701 | * we got here. Assume the server is aware of it at | |
702 | * that point and don't worry about setting | |
703 | * CEPH_I_ASYNC_CREATE. | |
704 | */ | |
705 | ceph_inode(inode)->i_ceph_flags = CEPH_I_ASYNC_CREATE; | |
706 | unlock_new_inode(inode); | |
707 | } | |
708 | if (d_in_lookup(dentry) || d_really_is_negative(dentry)) { | |
709 | if (!d_unhashed(dentry)) | |
710 | d_drop(dentry); | |
711 | dn = d_splice_alias(inode, dentry); | |
712 | WARN_ON_ONCE(dn && dn != dentry); | |
713 | } | |
714 | file->f_mode |= FMODE_CREATED; | |
715 | ret = finish_open(file, dentry, ceph_open); | |
716 | } | |
00061645 XL |
717 | |
718 | spin_lock(&dentry->d_lock); | |
719 | di->flags &= ~CEPH_DENTRY_ASYNC_CREATE; | |
720 | wake_up_bit(&di->flags, CEPH_DENTRY_ASYNC_CREATE_BIT); | |
721 | spin_unlock(&dentry->d_lock); | |
722 | ||
9a8d03ca JL |
723 | return ret; |
724 | } | |
725 | ||
124e68e7 | 726 | /* |
5ef50c3b SW |
727 | * Do a lookup + open with a single request. If we get a non-existent |
728 | * file or symlink, return 1 so the VFS can retry. | |
124e68e7 | 729 | */ |
5ef50c3b | 730 | int ceph_atomic_open(struct inode *dir, struct dentry *dentry, |
44907d79 | 731 | struct file *file, unsigned flags, umode_t mode) |
124e68e7 | 732 | { |
3d14c5d2 YS |
733 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
734 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
124e68e7 | 735 | struct ceph_mds_request *req; |
5ef50c3b | 736 | struct dentry *dn; |
5c31e92d | 737 | struct ceph_acl_sec_ctx as_ctx = {}; |
9a8d03ca | 738 | bool try_async = ceph_test_mount_opt(fsc, ASYNC_DIROPS); |
b7a29217 | 739 | int mask; |
124e68e7 | 740 | int err; |
124e68e7 | 741 | |
a455589f AV |
742 | dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n", |
743 | dir, dentry, dentry, | |
5ef50c3b SW |
744 | d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode); |
745 | ||
746 | if (dentry->d_name.len > NAME_MAX) | |
747 | return -ENAMETOOLONG; | |
748 | ||
4868e537 XL |
749 | err = ceph_wait_on_conflict_unlink(dentry); |
750 | if (err) | |
751 | return err; | |
7cb99947 HW |
752 | /* |
753 | * Do not truncate the file, since atomic_open is called before the | |
754 | * permission check. The caller will do the truncation afterward. | |
755 | */ | |
756 | flags &= ~O_TRUNC; | |
4868e537 | 757 | |
b1ee94aa | 758 | if (flags & O_CREAT) { |
b7a29217 LH |
759 | if (ceph_quota_is_max_files_exceeded(dir)) |
760 | return -EDQUOT; | |
5c31e92d | 761 | err = ceph_pre_init_acls(dir, &mode, &as_ctx); |
b1ee94aa YZ |
762 | if (err < 0) |
763 | return err; | |
ac6713cc YZ |
764 | err = ceph_security_init_secctx(dentry, mode, &as_ctx); |
765 | if (err < 0) | |
766 | goto out_ctx; | |
620239d9 JL |
767 | /* Async create can't handle more than a page of xattrs */ |
768 | if (as_ctx.pagelist && | |
769 | !list_is_singular(&as_ctx.pagelist->head)) | |
770 | try_async = false; | |
5bb5e6ee JL |
771 | } else if (!d_in_lookup(dentry)) { |
772 | /* If it's not being looked up, it's negative */ | |
773 | return -ENOENT; | |
b1ee94aa | 774 | } |
9a8d03ca | 775 | retry: |
124e68e7 SW |
776 | /* do the open */ |
777 | req = prepare_open_request(dir->i_sb, flags, mode); | |
b1ee94aa YZ |
778 | if (IS_ERR(req)) { |
779 | err = PTR_ERR(req); | |
5c31e92d | 780 | goto out_ctx; |
b1ee94aa | 781 | } |
124e68e7 SW |
782 | req->r_dentry = dget(dentry); |
783 | req->r_num_caps = 2; | |
9a8d03ca JL |
784 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; |
785 | if (ceph_security_xattr_wanted(dir)) | |
786 | mask |= CEPH_CAP_XATTR_SHARED; | |
787 | req->r_args.open.mask = cpu_to_le32(mask); | |
788 | req->r_parent = dir; | |
4c183472 | 789 | ihold(dir); |
9a8d03ca | 790 | |
124e68e7 | 791 | if (flags & O_CREAT) { |
9a8d03ca JL |
792 | struct ceph_file_layout lo; |
793 | ||
222b7f90 | 794 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL; |
124e68e7 | 795 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |
5c31e92d YZ |
796 | if (as_ctx.pagelist) { |
797 | req->r_pagelist = as_ctx.pagelist; | |
798 | as_ctx.pagelist = NULL; | |
b1ee94aa | 799 | } |
9a8d03ca JL |
800 | if (try_async && |
801 | (req->r_dir_caps = | |
802 | try_prep_async_create(dir, dentry, &lo, | |
803 | &req->r_deleg_ino))) { | |
00061645 XL |
804 | struct ceph_dentry_info *di = ceph_dentry(dentry); |
805 | ||
9a8d03ca JL |
806 | set_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags); |
807 | req->r_args.open.flags |= cpu_to_le32(CEPH_O_EXCL); | |
808 | req->r_callback = ceph_async_create_cb; | |
00061645 XL |
809 | |
810 | spin_lock(&dentry->d_lock); | |
811 | di->flags |= CEPH_DENTRY_ASYNC_CREATE; | |
812 | spin_unlock(&dentry->d_lock); | |
813 | ||
9a8d03ca JL |
814 | err = ceph_mdsc_submit_request(mdsc, dir, req); |
815 | if (!err) { | |
816 | err = ceph_finish_async_create(dir, dentry, | |
817 | file, mode, req, | |
818 | &as_ctx, &lo); | |
819 | } else if (err == -EJUKEBOX) { | |
820 | restore_deleg_ino(dir, req->r_deleg_ino); | |
821 | ceph_mdsc_put_request(req); | |
822 | try_async = false; | |
932a9b58 | 823 | ceph_put_string(rcu_dereference_raw(lo.pool_ns)); |
9a8d03ca JL |
824 | goto retry; |
825 | } | |
932a9b58 | 826 | ceph_put_string(rcu_dereference_raw(lo.pool_ns)); |
9a8d03ca JL |
827 | goto out_req; |
828 | } | |
124e68e7 | 829 | } |
315f2408 | 830 | |
3dd69aab | 831 | set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); |
7cb99947 | 832 | err = ceph_mdsc_do_request(mdsc, (flags & O_CREAT) ? dir : NULL, req); |
7a971e2c JL |
833 | if (err == -ENOENT) { |
834 | dentry = ceph_handle_snapdir(req, dentry); | |
835 | if (IS_ERR(dentry)) { | |
836 | err = PTR_ERR(dentry); | |
837 | goto out_req; | |
838 | } | |
839 | err = 0; | |
aa60cfc3 | 840 | } |
79aec984 | 841 | |
7a971e2c | 842 | if (!err && (flags & O_CREAT) && !req->r_reply_info.head->is_dentry) |
124e68e7 | 843 | err = ceph_handle_notrace_create(dir, dentry); |
2d83bde9 | 844 | |
00699ad8 | 845 | if (d_in_lookup(dentry)) { |
5ef50c3b SW |
846 | dn = ceph_finish_lookup(req, dentry, err); |
847 | if (IS_ERR(dn)) | |
848 | err = PTR_ERR(dn); | |
849 | } else { | |
850 | /* we were given a hashed negative dentry */ | |
851 | dn = NULL; | |
852 | } | |
853 | if (err) | |
b1ee94aa | 854 | goto out_req; |
2b0143b5 | 855 | if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) { |
5ef50c3b SW |
856 | /* make vfs retry on splice, ENOENT, or symlink */ |
857 | dout("atomic_open finish_no_open on dn %p\n", dn); | |
858 | err = finish_no_open(file, dn); | |
859 | } else { | |
860 | dout("atomic_open finish_open on dn %p\n", dn); | |
6e8575fa | 861 | if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) { |
785892fe JL |
862 | struct inode *newino = d_inode(dentry); |
863 | ||
864 | cache_file_layout(dir, newino); | |
865 | ceph_init_inode_acls(newino, &as_ctx); | |
73a09dd9 | 866 | file->f_mode |= FMODE_CREATED; |
6e8575fa | 867 | } |
be12af3e | 868 | err = finish_open(file, dentry, ceph_open); |
5ef50c3b | 869 | } |
b1ee94aa | 870 | out_req: |
5ef50c3b | 871 | ceph_mdsc_put_request(req); |
5c31e92d YZ |
872 | out_ctx: |
873 | ceph_release_acl_sec_ctx(&as_ctx); | |
5ef50c3b | 874 | dout("atomic_open result=%d\n", err); |
d9585277 | 875 | return err; |
124e68e7 SW |
876 | } |
877 | ||
878 | int ceph_release(struct inode *inode, struct file *file) | |
879 | { | |
880 | struct ceph_inode_info *ci = ceph_inode(inode); | |
124e68e7 | 881 | |
bb48bd4d CX |
882 | if (S_ISDIR(inode->i_mode)) { |
883 | struct ceph_dir_file_info *dfi = file->private_data; | |
884 | dout("release inode %p dir file %p\n", inode, file); | |
885 | WARN_ON(!list_empty(&dfi->file_info.rw_contexts)); | |
886 | ||
719a2514 | 887 | ceph_put_fmode(ci, dfi->file_info.fmode, 1); |
bb48bd4d CX |
888 | |
889 | if (dfi->last_readdir) | |
890 | ceph_mdsc_put_request(dfi->last_readdir); | |
891 | kfree(dfi->last_name); | |
892 | kfree(dfi->dir_info); | |
893 | kmem_cache_free(ceph_dir_file_cachep, dfi); | |
894 | } else { | |
895 | struct ceph_file_info *fi = file->private_data; | |
896 | dout("release inode %p regular file %p\n", inode, file); | |
897 | WARN_ON(!list_empty(&fi->rw_contexts)); | |
898 | ||
400e1286 | 899 | ceph_fscache_unuse_cookie(inode, file->f_mode & FMODE_WRITE); |
719a2514 YZ |
900 | ceph_put_fmode(ci, fi->fmode, 1); |
901 | ||
bb48bd4d CX |
902 | kmem_cache_free(ceph_file_cachep, fi); |
903 | } | |
195d3ce2 SW |
904 | |
905 | /* wake up anyone waiting for caps on this inode */ | |
03066f23 | 906 | wake_up_all(&ci->i_cap_wq); |
124e68e7 SW |
907 | return 0; |
908 | } | |
909 | ||
83701246 | 910 | enum { |
c8fe9b17 YZ |
911 | HAVE_RETRIED = 1, |
912 | CHECK_EOF = 2, | |
913 | READ_INLINE = 3, | |
83701246 YZ |
914 | }; |
915 | ||
124e68e7 SW |
916 | /* |
917 | * Completely synchronous read and write methods. Direct from __user | |
918 | * buffer to osd, or directly to user pages (if O_DIRECT). | |
919 | * | |
fce7a974 YZ |
920 | * If the read spans object boundary, just do multiple reads. (That's not |
921 | * atomic, but good enough for now.) | |
922 | * | |
923 | * If we get a short result from the OSD, check against i_size; we need to | |
924 | * only return a short read to the caller if we hit EOF. | |
124e68e7 | 925 | */ |
7ce469a5 | 926 | static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to, |
fce7a974 | 927 | int *retry_op) |
124e68e7 | 928 | { |
8eb4efb0 | 929 | struct file *file = iocb->ki_filp; |
496ad9aa | 930 | struct inode *inode = file_inode(file); |
fce7a974 YZ |
931 | struct ceph_inode_info *ci = ceph_inode(inode); |
932 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
933 | struct ceph_osd_client *osdc = &fsc->client->osdc; | |
7ce469a5 | 934 | ssize_t ret; |
fce7a974 YZ |
935 | u64 off = iocb->ki_pos; |
936 | u64 len = iov_iter_count(to); | |
e485d028 | 937 | u64 i_size = i_size_read(inode); |
124e68e7 | 938 | |
1c0a9c2d | 939 | dout("sync_read on file %p %llu~%u %s\n", file, off, (unsigned)len, |
124e68e7 | 940 | (file->f_flags & O_DIRECT) ? "O_DIRECT" : ""); |
d0d0db22 YZ |
941 | |
942 | if (!len) | |
943 | return 0; | |
e98b6fed SW |
944 | /* |
945 | * flush any page cache pages in this range. this | |
946 | * will make concurrent normal and sync io slow, | |
947 | * but it will at least behave sensibly when they are | |
948 | * in sequence. | |
949 | */ | |
e450f4d1 | 950 | ret = filemap_write_and_wait_range(inode->i_mapping, |
951 | off, off + len - 1); | |
29065a51 | 952 | if (ret < 0) |
8eb4efb0 | 953 | return ret; |
29065a51 | 954 | |
fce7a974 YZ |
955 | ret = 0; |
956 | while ((len = iov_iter_count(to)) > 0) { | |
957 | struct ceph_osd_request *req; | |
958 | struct page **pages; | |
959 | int num_pages; | |
7ce469a5 | 960 | size_t page_off; |
fce7a974 | 961 | bool more; |
c5f575ed JL |
962 | int idx; |
963 | size_t left; | |
fce7a974 YZ |
964 | |
965 | req = ceph_osdc_new_request(osdc, &ci->i_layout, | |
966 | ci->i_vino, off, &len, 0, 1, | |
967 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
968 | NULL, ci->i_truncate_seq, | |
969 | ci->i_truncate_size, false); | |
970 | if (IS_ERR(req)) { | |
971 | ret = PTR_ERR(req); | |
972 | break; | |
973 | } | |
7ce469a5 | 974 | |
fce7a974 YZ |
975 | more = len < iov_iter_count(to); |
976 | ||
c5f575ed JL |
977 | num_pages = calc_pages_for(off, len); |
978 | page_off = off & ~PAGE_MASK; | |
979 | pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); | |
980 | if (IS_ERR(pages)) { | |
981 | ceph_osdc_put_request(req); | |
982 | ret = PTR_ERR(pages); | |
983 | break; | |
7ce469a5 | 984 | } |
fce7a974 YZ |
985 | |
986 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_off, | |
987 | false, false); | |
a8af0d68 JL |
988 | ceph_osdc_start_request(osdc, req); |
989 | ret = ceph_osdc_wait_request(osdc, req); | |
97e27aaa | 990 | |
8ae99ae2 | 991 | ceph_update_read_metrics(&fsc->mdsc->metric, |
97e27aaa XL |
992 | req->r_start_latency, |
993 | req->r_end_latency, | |
903f4fec | 994 | len, ret); |
97e27aaa | 995 | |
fce7a974 YZ |
996 | ceph_osdc_put_request(req); |
997 | ||
998 | i_size = i_size_read(inode); | |
999 | dout("sync_read %llu~%llu got %zd i_size %llu%s\n", | |
1000 | off, len, ret, i_size, (more ? " MORE" : "")); | |
1001 | ||
1002 | if (ret == -ENOENT) | |
1003 | ret = 0; | |
1004 | if (ret >= 0 && ret < len && (off + ret < i_size)) { | |
1005 | int zlen = min(len - ret, i_size - off - ret); | |
1006 | int zoff = page_off + ret; | |
1007 | dout("sync_read zero gap %llu~%llu\n", | |
1008 | off + ret, off + ret + zlen); | |
1009 | ceph_zero_page_vector_range(zoff, zlen, pages); | |
1010 | ret += zlen; | |
1011 | } | |
1012 | ||
c5f575ed JL |
1013 | idx = 0; |
1014 | left = ret > 0 ? ret : 0; | |
1015 | while (left > 0) { | |
1016 | size_t len, copied; | |
1017 | page_off = off & ~PAGE_MASK; | |
1018 | len = min_t(size_t, left, PAGE_SIZE - page_off); | |
1019 | SetPageUptodate(pages[idx]); | |
1020 | copied = copy_page_to_iter(pages[idx++], | |
1021 | page_off, len, to); | |
1022 | off += copied; | |
1023 | left -= copied; | |
1024 | if (copied < len) { | |
1025 | ret = -EFAULT; | |
1026 | break; | |
7ce469a5 | 1027 | } |
8eb4efb0 | 1028 | } |
c5f575ed | 1029 | ceph_release_page_vector(pages, num_pages); |
fce7a974 | 1030 | |
131d7eb4 | 1031 | if (ret < 0) { |
0b98acd6 ID |
1032 | if (ret == -EBLOCKLISTED) |
1033 | fsc->blocklisted = true; | |
131d7eb4 YZ |
1034 | break; |
1035 | } | |
1036 | ||
1037 | if (off >= i_size || !more) | |
fce7a974 | 1038 | break; |
8eb4efb0 | 1039 | } |
124e68e7 | 1040 | |
8eb4efb0 | 1041 | if (off > iocb->ki_pos) { |
c3d8e0b5 | 1042 | if (off >= i_size) { |
fce7a974 | 1043 | *retry_op = CHECK_EOF; |
c3d8e0b5 XL |
1044 | ret = i_size - iocb->ki_pos; |
1045 | iocb->ki_pos = i_size; | |
1046 | } else { | |
1047 | ret = off - iocb->ki_pos; | |
1048 | iocb->ki_pos = off; | |
1049 | } | |
8eb4efb0 | 1050 | } |
124e68e7 | 1051 | |
fce7a974 | 1052 | dout("sync_read result %zd retry_op %d\n", ret, *retry_op); |
124e68e7 SW |
1053 | return ret; |
1054 | } | |
1055 | ||
c8fe9b17 YZ |
1056 | struct ceph_aio_request { |
1057 | struct kiocb *iocb; | |
1058 | size_t total_len; | |
85784f93 YZ |
1059 | bool write; |
1060 | bool should_dirty; | |
c8fe9b17 YZ |
1061 | int error; |
1062 | struct list_head osd_reqs; | |
1063 | unsigned num_reqs; | |
1064 | atomic_t pending_reqs; | |
fac02ddf | 1065 | struct timespec64 mtime; |
c8fe9b17 YZ |
1066 | struct ceph_cap_flush *prealloc_cf; |
1067 | }; | |
1068 | ||
5be0389d YZ |
1069 | struct ceph_aio_work { |
1070 | struct work_struct work; | |
1071 | struct ceph_osd_request *req; | |
1072 | }; | |
1073 | ||
1074 | static void ceph_aio_retry_work(struct work_struct *work); | |
1075 | ||
c8fe9b17 YZ |
1076 | static void ceph_aio_complete(struct inode *inode, |
1077 | struct ceph_aio_request *aio_req) | |
1078 | { | |
1079 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1080 | int ret; | |
1081 | ||
1082 | if (!atomic_dec_and_test(&aio_req->pending_reqs)) | |
1083 | return; | |
1084 | ||
6a81749e JL |
1085 | if (aio_req->iocb->ki_flags & IOCB_DIRECT) |
1086 | inode_dio_end(inode); | |
1087 | ||
c8fe9b17 YZ |
1088 | ret = aio_req->error; |
1089 | if (!ret) | |
1090 | ret = aio_req->total_len; | |
1091 | ||
1092 | dout("ceph_aio_complete %p rc %d\n", inode, ret); | |
1093 | ||
1094 | if (ret >= 0 && aio_req->write) { | |
1095 | int dirty; | |
1096 | ||
1097 | loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len; | |
1098 | if (endoff > i_size_read(inode)) { | |
1099 | if (ceph_inode_set_size(inode, endoff)) | |
e4b731cc | 1100 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY); |
c8fe9b17 YZ |
1101 | } |
1102 | ||
1103 | spin_lock(&ci->i_ceph_lock); | |
c8fe9b17 YZ |
1104 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
1105 | &aio_req->prealloc_cf); | |
1106 | spin_unlock(&ci->i_ceph_lock); | |
1107 | if (dirty) | |
1108 | __mark_inode_dirty(inode, dirty); | |
1109 | ||
1110 | } | |
1111 | ||
1112 | ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR : | |
1113 | CEPH_CAP_FILE_RD)); | |
1114 | ||
6b19b766 | 1115 | aio_req->iocb->ki_complete(aio_req->iocb, ret); |
c8fe9b17 YZ |
1116 | |
1117 | ceph_free_cap_flush(aio_req->prealloc_cf); | |
1118 | kfree(aio_req); | |
1119 | } | |
1120 | ||
85e084fe | 1121 | static void ceph_aio_complete_req(struct ceph_osd_request *req) |
c8fe9b17 YZ |
1122 | { |
1123 | int rc = req->r_result; | |
1124 | struct inode *inode = req->r_inode; | |
1125 | struct ceph_aio_request *aio_req = req->r_priv; | |
1126 | struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0); | |
2678da88 | 1127 | struct ceph_client_metric *metric = &ceph_sb_to_mdsc(inode->i_sb)->metric; |
903f4fec | 1128 | unsigned int len = osd_data->bvec_pos.iter.bi_size; |
c8fe9b17 | 1129 | |
fc218544 ID |
1130 | BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_BVECS); |
1131 | BUG_ON(!osd_data->num_bvecs); | |
1132 | ||
903f4fec | 1133 | dout("ceph_aio_complete_req %p rc %d bytes %u\n", inode, rc, len); |
c8fe9b17 YZ |
1134 | |
1135 | if (rc == -EOLDSNAPC) { | |
5be0389d YZ |
1136 | struct ceph_aio_work *aio_work; |
1137 | BUG_ON(!aio_req->write); | |
1138 | ||
1139 | aio_work = kmalloc(sizeof(*aio_work), GFP_NOFS); | |
1140 | if (aio_work) { | |
1141 | INIT_WORK(&aio_work->work, ceph_aio_retry_work); | |
1142 | aio_work->req = req; | |
1cf89a8d | 1143 | queue_work(ceph_inode_to_client(inode)->inode_wq, |
5be0389d YZ |
1144 | &aio_work->work); |
1145 | return; | |
1146 | } | |
1147 | rc = -ENOMEM; | |
1148 | } else if (!aio_req->write) { | |
c8fe9b17 YZ |
1149 | if (rc == -ENOENT) |
1150 | rc = 0; | |
903f4fec | 1151 | if (rc >= 0 && len > rc) { |
fc218544 | 1152 | struct iov_iter i; |
903f4fec | 1153 | int zlen = len - rc; |
fc218544 | 1154 | |
c8fe9b17 YZ |
1155 | /* |
1156 | * If read is satisfied by single OSD request, | |
1157 | * it can pass EOF. Otherwise read is within | |
1158 | * i_size. | |
1159 | */ | |
1160 | if (aio_req->num_reqs == 1) { | |
1161 | loff_t i_size = i_size_read(inode); | |
1162 | loff_t endoff = aio_req->iocb->ki_pos + rc; | |
1163 | if (endoff < i_size) | |
1164 | zlen = min_t(size_t, zlen, | |
1165 | i_size - endoff); | |
1166 | aio_req->total_len = rc + zlen; | |
1167 | } | |
1168 | ||
de4eda9d | 1169 | iov_iter_bvec(&i, ITER_DEST, osd_data->bvec_pos.bvecs, |
903f4fec | 1170 | osd_data->num_bvecs, len); |
fc218544 ID |
1171 | iov_iter_advance(&i, rc); |
1172 | iov_iter_zero(zlen, &i); | |
c8fe9b17 YZ |
1173 | } |
1174 | } | |
1175 | ||
fbd47ddc XL |
1176 | /* r_start_latency == 0 means the request was not submitted */ |
1177 | if (req->r_start_latency) { | |
1178 | if (aio_req->write) | |
1179 | ceph_update_write_metrics(metric, req->r_start_latency, | |
903f4fec | 1180 | req->r_end_latency, len, rc); |
fbd47ddc XL |
1181 | else |
1182 | ceph_update_read_metrics(metric, req->r_start_latency, | |
903f4fec | 1183 | req->r_end_latency, len, rc); |
fbd47ddc XL |
1184 | } |
1185 | ||
fc218544 ID |
1186 | put_bvecs(osd_data->bvec_pos.bvecs, osd_data->num_bvecs, |
1187 | aio_req->should_dirty); | |
c8fe9b17 YZ |
1188 | ceph_osdc_put_request(req); |
1189 | ||
1190 | if (rc < 0) | |
1191 | cmpxchg(&aio_req->error, 0, rc); | |
1192 | ||
1193 | ceph_aio_complete(inode, aio_req); | |
1194 | return; | |
1195 | } | |
1196 | ||
5be0389d YZ |
1197 | static void ceph_aio_retry_work(struct work_struct *work) |
1198 | { | |
1199 | struct ceph_aio_work *aio_work = | |
1200 | container_of(work, struct ceph_aio_work, work); | |
1201 | struct ceph_osd_request *orig_req = aio_work->req; | |
1202 | struct ceph_aio_request *aio_req = orig_req->r_priv; | |
1203 | struct inode *inode = orig_req->r_inode; | |
1204 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1205 | struct ceph_snap_context *snapc; | |
1206 | struct ceph_osd_request *req; | |
1207 | int ret; | |
1208 | ||
1209 | spin_lock(&ci->i_ceph_lock); | |
1210 | if (__ceph_have_pending_cap_snap(ci)) { | |
1211 | struct ceph_cap_snap *capsnap = | |
1212 | list_last_entry(&ci->i_cap_snaps, | |
1213 | struct ceph_cap_snap, | |
1214 | ci_item); | |
1215 | snapc = ceph_get_snap_context(capsnap->context); | |
1216 | } else { | |
1217 | BUG_ON(!ci->i_head_snapc); | |
1218 | snapc = ceph_get_snap_context(ci->i_head_snapc); | |
1219 | } | |
1220 | spin_unlock(&ci->i_ceph_lock); | |
1221 | ||
61d2f855 | 1222 | req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 1, |
5be0389d | 1223 | false, GFP_NOFS); |
1418bf07 DC |
1224 | if (!req) { |
1225 | ret = -ENOMEM; | |
5be0389d YZ |
1226 | req = orig_req; |
1227 | goto out; | |
1228 | } | |
1229 | ||
b178cf43 | 1230 | req->r_flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
63244fa1 | 1231 | ceph_oloc_copy(&req->r_base_oloc, &orig_req->r_base_oloc); |
d30291b9 | 1232 | ceph_oid_copy(&req->r_base_oid, &orig_req->r_base_oid); |
5be0389d | 1233 | |
26f887e0 ID |
1234 | req->r_ops[0] = orig_req->r_ops[0]; |
1235 | ||
1236 | req->r_mtime = aio_req->mtime; | |
1237 | req->r_data_offset = req->r_ops[0].extent.offset; | |
1238 | ||
13d1ad16 ID |
1239 | ret = ceph_osdc_alloc_messages(req, GFP_NOFS); |
1240 | if (ret) { | |
1241 | ceph_osdc_put_request(req); | |
1242 | req = orig_req; | |
1243 | goto out; | |
1244 | } | |
5be0389d | 1245 | |
5be0389d YZ |
1246 | ceph_osdc_put_request(orig_req); |
1247 | ||
1248 | req->r_callback = ceph_aio_complete_req; | |
1249 | req->r_inode = inode; | |
1250 | req->r_priv = aio_req; | |
1251 | ||
a8af0d68 | 1252 | ceph_osdc_start_request(req->r_osdc, req); |
5be0389d YZ |
1253 | out: |
1254 | if (ret < 0) { | |
5be0389d | 1255 | req->r_result = ret; |
85e084fe | 1256 | ceph_aio_complete_req(req); |
5be0389d YZ |
1257 | } |
1258 | ||
db6aed70 | 1259 | ceph_put_snap_context(snapc); |
5be0389d YZ |
1260 | kfree(aio_work); |
1261 | } | |
1262 | ||
e8344e66 | 1263 | static ssize_t |
c8fe9b17 YZ |
1264 | ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter, |
1265 | struct ceph_snap_context *snapc, | |
1266 | struct ceph_cap_flush **pcf) | |
124e68e7 | 1267 | { |
e8344e66 | 1268 | struct file *file = iocb->ki_filp; |
496ad9aa | 1269 | struct inode *inode = file_inode(file); |
124e68e7 | 1270 | struct ceph_inode_info *ci = ceph_inode(inode); |
3d14c5d2 | 1271 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
97e27aaa | 1272 | struct ceph_client_metric *metric = &fsc->mdsc->metric; |
acead002 | 1273 | struct ceph_vino vino; |
124e68e7 | 1274 | struct ceph_osd_request *req; |
fc218544 | 1275 | struct bio_vec *bvecs; |
c8fe9b17 YZ |
1276 | struct ceph_aio_request *aio_req = NULL; |
1277 | int num_pages = 0; | |
124e68e7 | 1278 | int flags; |
321fe13c | 1279 | int ret = 0; |
fac02ddf | 1280 | struct timespec64 mtime = current_time(inode); |
c8fe9b17 YZ |
1281 | size_t count = iov_iter_count(iter); |
1282 | loff_t pos = iocb->ki_pos; | |
1283 | bool write = iov_iter_rw(iter) == WRITE; | |
fcb14cb1 | 1284 | bool should_dirty = !write && user_backed_iter(iter); |
124e68e7 | 1285 | |
c8fe9b17 | 1286 | if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP) |
124e68e7 SW |
1287 | return -EROFS; |
1288 | ||
1c0a9c2d YZ |
1289 | dout("sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n", |
1290 | (write ? "write" : "read"), file, pos, (unsigned)count, | |
40e7e2c0 | 1291 | snapc, snapc ? snapc->seq : 0); |
124e68e7 | 1292 | |
c8fe9b17 | 1293 | if (write) { |
400e1286 JL |
1294 | int ret2; |
1295 | ||
1296 | ceph_fscache_invalidate(inode, true); | |
1297 | ||
1298 | ret2 = invalidate_inode_pages2_range(inode->i_mapping, | |
09cbfeaf | 1299 | pos >> PAGE_SHIFT, |
e450f4d1 | 1300 | (pos + count - 1) >> PAGE_SHIFT); |
5d7eb1a3 | 1301 | if (ret2 < 0) |
a380a031 | 1302 | dout("invalidate_inode_pages2_range returned %d\n", ret2); |
29065a51 | 1303 | |
b178cf43 | 1304 | flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
c8fe9b17 YZ |
1305 | } else { |
1306 | flags = CEPH_OSD_FLAG_READ; | |
1307 | } | |
124e68e7 | 1308 | |
c8fe9b17 | 1309 | while (iov_iter_count(iter) > 0) { |
fc218544 | 1310 | u64 size = iov_iter_count(iter); |
c8fe9b17 | 1311 | ssize_t len; |
e8344e66 | 1312 | |
3a15b38f ID |
1313 | if (write) |
1314 | size = min_t(u64, size, fsc->mount_options->wsize); | |
1315 | else | |
1316 | size = min_t(u64, size, fsc->mount_options->rsize); | |
1317 | ||
e8344e66 | 1318 | vino = ceph_vino(inode); |
1319 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
c8fe9b17 | 1320 | vino, pos, &size, 0, |
3fb99d48 | 1321 | 1, |
c8fe9b17 YZ |
1322 | write ? CEPH_OSD_OP_WRITE : |
1323 | CEPH_OSD_OP_READ, | |
1324 | flags, snapc, | |
e8344e66 | 1325 | ci->i_truncate_seq, |
1326 | ci->i_truncate_size, | |
1327 | false); | |
1328 | if (IS_ERR(req)) { | |
1329 | ret = PTR_ERR(req); | |
eab87235 | 1330 | break; |
e8344e66 | 1331 | } |
124e68e7 | 1332 | |
fc218544 ID |
1333 | len = iter_get_bvecs_alloc(iter, size, &bvecs, &num_pages); |
1334 | if (len < 0) { | |
64c31311 | 1335 | ceph_osdc_put_request(req); |
fc218544 | 1336 | ret = len; |
64c31311 | 1337 | break; |
124e68e7 | 1338 | } |
fc218544 ID |
1339 | if (len != size) |
1340 | osd_req_op_extent_update(req, 0, len); | |
124e68e7 SW |
1341 | |
1342 | /* | |
c8fe9b17 YZ |
1343 | * To simplify error handling, allow AIO when IO within i_size |
1344 | * or IO can be satisfied by single OSD request. | |
124e68e7 | 1345 | */ |
c8fe9b17 YZ |
1346 | if (pos == iocb->ki_pos && !is_sync_kiocb(iocb) && |
1347 | (len == count || pos + count <= i_size_read(inode))) { | |
1348 | aio_req = kzalloc(sizeof(*aio_req), GFP_KERNEL); | |
1349 | if (aio_req) { | |
1350 | aio_req->iocb = iocb; | |
1351 | aio_req->write = write; | |
85784f93 | 1352 | aio_req->should_dirty = should_dirty; |
c8fe9b17 YZ |
1353 | INIT_LIST_HEAD(&aio_req->osd_reqs); |
1354 | if (write) { | |
5be0389d | 1355 | aio_req->mtime = mtime; |
c8fe9b17 YZ |
1356 | swap(aio_req->prealloc_cf, *pcf); |
1357 | } | |
1358 | } | |
1359 | /* ignore error */ | |
1360 | } | |
1361 | ||
1362 | if (write) { | |
1363 | /* | |
1364 | * throw out any page cache pages in this range. this | |
1365 | * may block. | |
1366 | */ | |
1367 | truncate_inode_pages_range(inode->i_mapping, pos, | |
d31d07b9 | 1368 | PAGE_ALIGN(pos + len) - 1); |
c8fe9b17 | 1369 | |
bb873b53 | 1370 | req->r_mtime = mtime; |
c8fe9b17 YZ |
1371 | } |
1372 | ||
fc218544 | 1373 | osd_req_op_extent_osd_data_bvecs(req, 0, bvecs, num_pages, len); |
e8344e66 | 1374 | |
c8fe9b17 YZ |
1375 | if (aio_req) { |
1376 | aio_req->total_len += len; | |
1377 | aio_req->num_reqs++; | |
1378 | atomic_inc(&aio_req->pending_reqs); | |
1379 | ||
1380 | req->r_callback = ceph_aio_complete_req; | |
1381 | req->r_inode = inode; | |
1382 | req->r_priv = aio_req; | |
94e85771 | 1383 | list_add_tail(&req->r_private_item, &aio_req->osd_reqs); |
c8fe9b17 YZ |
1384 | |
1385 | pos += len; | |
c8fe9b17 YZ |
1386 | continue; |
1387 | } | |
1388 | ||
a8af0d68 JL |
1389 | ceph_osdc_start_request(req->r_osdc, req); |
1390 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
e8344e66 | 1391 | |
97e27aaa | 1392 | if (write) |
8ae99ae2 | 1393 | ceph_update_write_metrics(metric, req->r_start_latency, |
903f4fec | 1394 | req->r_end_latency, len, ret); |
97e27aaa | 1395 | else |
8ae99ae2 | 1396 | ceph_update_read_metrics(metric, req->r_start_latency, |
903f4fec | 1397 | req->r_end_latency, len, ret); |
97e27aaa | 1398 | |
c8fe9b17 YZ |
1399 | size = i_size_read(inode); |
1400 | if (!write) { | |
1401 | if (ret == -ENOENT) | |
1402 | ret = 0; | |
1403 | if (ret >= 0 && ret < len && pos + ret < size) { | |
fc218544 | 1404 | struct iov_iter i; |
c8fe9b17 YZ |
1405 | int zlen = min_t(size_t, len - ret, |
1406 | size - pos - ret); | |
fc218544 | 1407 | |
de4eda9d | 1408 | iov_iter_bvec(&i, ITER_DEST, bvecs, num_pages, len); |
fc218544 ID |
1409 | iov_iter_advance(&i, ret); |
1410 | iov_iter_zero(zlen, &i); | |
c8fe9b17 YZ |
1411 | ret += zlen; |
1412 | } | |
1413 | if (ret >= 0) | |
1414 | len = ret; | |
1415 | } | |
1416 | ||
fc218544 | 1417 | put_bvecs(bvecs, num_pages, should_dirty); |
e8344e66 | 1418 | ceph_osdc_put_request(req); |
c8fe9b17 | 1419 | if (ret < 0) |
e8344e66 | 1420 | break; |
64c31311 | 1421 | |
c8fe9b17 | 1422 | pos += len; |
c8fe9b17 | 1423 | if (!write && pos >= size) |
e8344e66 | 1424 | break; |
64c31311 | 1425 | |
c8fe9b17 YZ |
1426 | if (write && pos > size) { |
1427 | if (ceph_inode_set_size(inode, pos)) | |
64c31311 | 1428 | ceph_check_caps(ceph_inode(inode), |
e4b731cc | 1429 | CHECK_CAPS_AUTHONLY); |
64c31311 | 1430 | } |
e8344e66 | 1431 | } |
1432 | ||
c8fe9b17 | 1433 | if (aio_req) { |
fc8c3892 YZ |
1434 | LIST_HEAD(osd_reqs); |
1435 | ||
c8fe9b17 YZ |
1436 | if (aio_req->num_reqs == 0) { |
1437 | kfree(aio_req); | |
1438 | return ret; | |
1439 | } | |
1440 | ||
1441 | ceph_get_cap_refs(ci, write ? CEPH_CAP_FILE_WR : | |
1442 | CEPH_CAP_FILE_RD); | |
1443 | ||
fc8c3892 | 1444 | list_splice(&aio_req->osd_reqs, &osd_reqs); |
6a81749e | 1445 | inode_dio_begin(inode); |
fc8c3892 YZ |
1446 | while (!list_empty(&osd_reqs)) { |
1447 | req = list_first_entry(&osd_reqs, | |
c8fe9b17 | 1448 | struct ceph_osd_request, |
94e85771 ID |
1449 | r_private_item); |
1450 | list_del_init(&req->r_private_item); | |
c8fe9b17 | 1451 | if (ret >= 0) |
a8af0d68 | 1452 | ceph_osdc_start_request(req->r_osdc, req); |
c8fe9b17 YZ |
1453 | if (ret < 0) { |
1454 | req->r_result = ret; | |
85e084fe | 1455 | ceph_aio_complete_req(req); |
c8fe9b17 YZ |
1456 | } |
1457 | } | |
1458 | return -EIOCBQUEUED; | |
1459 | } | |
1460 | ||
1461 | if (ret != -EOLDSNAPC && pos > iocb->ki_pos) { | |
1462 | ret = pos - iocb->ki_pos; | |
e8344e66 | 1463 | iocb->ki_pos = pos; |
e8344e66 | 1464 | } |
1465 | return ret; | |
1466 | } | |
1467 | ||
e8344e66 | 1468 | /* |
1469 | * Synchronous write, straight from __user pointer or user pages. | |
1470 | * | |
1471 | * If write spans object boundary, just do multiple writes. (For a | |
1472 | * correct atomic write, we should e.g. take write locks on all | |
1473 | * objects, rollback on failure, etc.) | |
1474 | */ | |
06fee30f | 1475 | static ssize_t |
5dda377c YZ |
1476 | ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos, |
1477 | struct ceph_snap_context *snapc) | |
e8344e66 | 1478 | { |
1479 | struct file *file = iocb->ki_filp; | |
1480 | struct inode *inode = file_inode(file); | |
1481 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1482 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
e8344e66 | 1483 | struct ceph_vino vino; |
1484 | struct ceph_osd_request *req; | |
1485 | struct page **pages; | |
1486 | u64 len; | |
1487 | int num_pages; | |
1488 | int written = 0; | |
1489 | int flags; | |
e8344e66 | 1490 | int ret; |
efb0ca76 | 1491 | bool check_caps = false; |
fac02ddf | 1492 | struct timespec64 mtime = current_time(inode); |
4908b822 | 1493 | size_t count = iov_iter_count(from); |
e8344e66 | 1494 | |
1495 | if (ceph_snap(file_inode(file)) != CEPH_NOSNAP) | |
1496 | return -EROFS; | |
1497 | ||
1c0a9c2d YZ |
1498 | dout("sync_write on file %p %lld~%u snapc %p seq %lld\n", |
1499 | file, pos, (unsigned)count, snapc, snapc->seq); | |
e8344e66 | 1500 | |
e450f4d1 | 1501 | ret = filemap_write_and_wait_range(inode->i_mapping, |
1502 | pos, pos + count - 1); | |
e8344e66 | 1503 | if (ret < 0) |
1504 | return ret; | |
1505 | ||
400e1286 | 1506 | ceph_fscache_invalidate(inode, false); |
e8344e66 | 1507 | ret = invalidate_inode_pages2_range(inode->i_mapping, |
09cbfeaf | 1508 | pos >> PAGE_SHIFT, |
e450f4d1 | 1509 | (pos + count - 1) >> PAGE_SHIFT); |
e8344e66 | 1510 | if (ret < 0) |
1511 | dout("invalidate_inode_pages2_range returned %d\n", ret); | |
1512 | ||
b178cf43 | 1513 | flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
e8344e66 | 1514 | |
4908b822 | 1515 | while ((len = iov_iter_count(from)) > 0) { |
e8344e66 | 1516 | size_t left; |
1517 | int n; | |
1518 | ||
e8344e66 | 1519 | vino = ceph_vino(inode); |
1520 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
715e4cd4 | 1521 | vino, pos, &len, 0, 1, |
e8344e66 | 1522 | CEPH_OSD_OP_WRITE, flags, snapc, |
1523 | ci->i_truncate_seq, | |
1524 | ci->i_truncate_size, | |
1525 | false); | |
1526 | if (IS_ERR(req)) { | |
1527 | ret = PTR_ERR(req); | |
eab87235 | 1528 | break; |
e8344e66 | 1529 | } |
1530 | ||
1531 | /* | |
1532 | * write from beginning of first page, | |
1533 | * regardless of io alignment | |
1534 | */ | |
09cbfeaf | 1535 | num_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e8344e66 | 1536 | |
687265e5 | 1537 | pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); |
124e68e7 SW |
1538 | if (IS_ERR(pages)) { |
1539 | ret = PTR_ERR(pages); | |
1540 | goto out; | |
1541 | } | |
e8344e66 | 1542 | |
1543 | left = len; | |
1544 | for (n = 0; n < num_pages; n++) { | |
125d725c | 1545 | size_t plen = min_t(size_t, left, PAGE_SIZE); |
4908b822 | 1546 | ret = copy_page_from_iter(pages[n], 0, plen, from); |
e8344e66 | 1547 | if (ret != plen) { |
1548 | ret = -EFAULT; | |
1549 | break; | |
1550 | } | |
1551 | left -= ret; | |
e8344e66 | 1552 | } |
1553 | ||
124e68e7 SW |
1554 | if (ret < 0) { |
1555 | ceph_release_page_vector(pages, num_pages); | |
1556 | goto out; | |
1557 | } | |
1558 | ||
e8344e66 | 1559 | req->r_inode = inode; |
124e68e7 | 1560 | |
e8344e66 | 1561 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0, |
1562 | false, true); | |
02ee07d3 | 1563 | |
bb873b53 | 1564 | req->r_mtime = mtime; |
a8af0d68 JL |
1565 | ceph_osdc_start_request(&fsc->client->osdc, req); |
1566 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
124e68e7 | 1567 | |
8ae99ae2 | 1568 | ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, |
903f4fec | 1569 | req->r_end_latency, len, ret); |
124e68e7 | 1570 | out: |
e8344e66 | 1571 | ceph_osdc_put_request(req); |
26544c62 JL |
1572 | if (ret != 0) { |
1573 | ceph_set_error_write(ci); | |
e8344e66 | 1574 | break; |
26544c62 JL |
1575 | } |
1576 | ||
1577 | ceph_clear_error_write(ci); | |
1578 | pos += len; | |
1579 | written += len; | |
1580 | if (pos > i_size_read(inode)) { | |
1581 | check_caps = ceph_inode_set_size(inode, pos); | |
1582 | if (check_caps) | |
1583 | ceph_check_caps(ceph_inode(inode), | |
e4b731cc | 1584 | CHECK_CAPS_AUTHONLY); |
26544c62 JL |
1585 | } |
1586 | ||
e8344e66 | 1587 | } |
124e68e7 | 1588 | |
e8344e66 | 1589 | if (ret != -EOLDSNAPC && written > 0) { |
124e68e7 | 1590 | ret = written; |
e8344e66 | 1591 | iocb->ki_pos = pos; |
124e68e7 SW |
1592 | } |
1593 | return ret; | |
1594 | } | |
1595 | ||
1596 | /* | |
1597 | * Wrap generic_file_aio_read with checks for cap bits on the inode. | |
1598 | * Atomically grab references, so that those bits are not released | |
1599 | * back to the MDS mid-read. | |
1600 | * | |
1601 | * Hmm, the sync read case isn't actually async... should it be? | |
1602 | */ | |
3644424d | 1603 | static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to) |
124e68e7 SW |
1604 | { |
1605 | struct file *filp = iocb->ki_filp; | |
2962507c | 1606 | struct ceph_file_info *fi = filp->private_data; |
66ee59af | 1607 | size_t len = iov_iter_count(to); |
496ad9aa | 1608 | struct inode *inode = file_inode(filp); |
124e68e7 | 1609 | struct ceph_inode_info *ci = ceph_inode(inode); |
d1d96550 | 1610 | bool direct_lock = iocb->ki_flags & IOCB_DIRECT; |
124e68e7 | 1611 | ssize_t ret; |
94cc0877 | 1612 | int want = 0, got = 0; |
83701246 | 1613 | int retry_op = 0, read = 0; |
124e68e7 | 1614 | |
6a026589 | 1615 | again: |
8eb4efb0 | 1616 | dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n", |
1617 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, inode); | |
1618 | ||
5d6451b1 JL |
1619 | if (ceph_inode_is_shutdown(inode)) |
1620 | return -ESTALE; | |
1621 | ||
d1d96550 | 1622 | if (direct_lock) |
a81bc310 JL |
1623 | ceph_start_io_direct(inode); |
1624 | else | |
1625 | ceph_start_io_read(inode); | |
1626 | ||
94cc0877 JL |
1627 | if (!(fi->flags & CEPH_F_SYNC) && !direct_lock) |
1628 | want |= CEPH_CAP_FILE_CACHE; | |
2962507c | 1629 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
94cc0877 JL |
1630 | want |= CEPH_CAP_FILE_LAZYIO; |
1631 | ||
e72968e1 | 1632 | ret = ceph_get_caps(filp, CEPH_CAP_FILE_RD, want, -1, &got); |
a81bc310 | 1633 | if (ret < 0) { |
94cc0877 | 1634 | if (direct_lock) |
a81bc310 JL |
1635 | ceph_end_io_direct(inode); |
1636 | else | |
1637 | ceph_end_io_read(inode); | |
8eb4efb0 | 1638 | return ret; |
a81bc310 | 1639 | } |
124e68e7 | 1640 | |
2962507c | 1641 | if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 || |
2ba48ce5 | 1642 | (iocb->ki_flags & IOCB_DIRECT) || |
8eb4efb0 | 1643 | (fi->flags & CEPH_F_SYNC)) { |
8eb4efb0 | 1644 | |
1645 | dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n", | |
1646 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, | |
1647 | ceph_cap_string(got)); | |
1648 | ||
48490776 | 1649 | if (!ceph_has_inline_data(ci)) { |
c8fe9b17 YZ |
1650 | if (!retry_op && (iocb->ki_flags & IOCB_DIRECT)) { |
1651 | ret = ceph_direct_read_write(iocb, to, | |
1652 | NULL, NULL); | |
1653 | if (ret >= 0 && ret < len) | |
1654 | retry_op = CHECK_EOF; | |
1655 | } else { | |
1656 | ret = ceph_sync_read(iocb, to, &retry_op); | |
1657 | } | |
83701246 YZ |
1658 | } else { |
1659 | retry_op = READ_INLINE; | |
1660 | } | |
8eb4efb0 | 1661 | } else { |
5d988308 | 1662 | CEPH_DEFINE_RW_CONTEXT(rw_ctx, got); |
8eb4efb0 | 1663 | dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n", |
3644424d | 1664 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, |
8eb4efb0 | 1665 | ceph_cap_string(got)); |
5d988308 | 1666 | ceph_add_rw_context(fi, &rw_ctx); |
3644424d | 1667 | ret = generic_file_read_iter(iocb, to); |
5d988308 | 1668 | ceph_del_rw_context(fi, &rw_ctx); |
8eb4efb0 | 1669 | } |
a81bc310 | 1670 | |
124e68e7 SW |
1671 | dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n", |
1672 | inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret); | |
1673 | ceph_put_cap_refs(ci, got); | |
a81bc310 | 1674 | |
d1d96550 | 1675 | if (direct_lock) |
a81bc310 JL |
1676 | ceph_end_io_direct(inode); |
1677 | else | |
1678 | ceph_end_io_read(inode); | |
1679 | ||
c8fe9b17 | 1680 | if (retry_op > HAVE_RETRIED && ret >= 0) { |
83701246 YZ |
1681 | int statret; |
1682 | struct page *page = NULL; | |
1683 | loff_t i_size; | |
1684 | if (retry_op == READ_INLINE) { | |
687265e5 | 1685 | page = __page_cache_alloc(GFP_KERNEL); |
83701246 YZ |
1686 | if (!page) |
1687 | return -ENOMEM; | |
1688 | } | |
6a026589 | 1689 | |
83701246 YZ |
1690 | statret = __ceph_do_getattr(inode, page, |
1691 | CEPH_STAT_CAP_INLINE_DATA, !!page); | |
1692 | if (statret < 0) { | |
0d7718f6 NB |
1693 | if (page) |
1694 | __free_page(page); | |
83701246 YZ |
1695 | if (statret == -ENODATA) { |
1696 | BUG_ON(retry_op != READ_INLINE); | |
1697 | goto again; | |
1698 | } | |
1699 | return statret; | |
1700 | } | |
6a026589 | 1701 | |
83701246 YZ |
1702 | i_size = i_size_read(inode); |
1703 | if (retry_op == READ_INLINE) { | |
fcc02d2a YZ |
1704 | BUG_ON(ret > 0 || read > 0); |
1705 | if (iocb->ki_pos < i_size && | |
09cbfeaf | 1706 | iocb->ki_pos < PAGE_SIZE) { |
83701246 YZ |
1707 | loff_t end = min_t(loff_t, i_size, |
1708 | iocb->ki_pos + len); | |
09cbfeaf | 1709 | end = min_t(loff_t, end, PAGE_SIZE); |
83701246 YZ |
1710 | if (statret < end) |
1711 | zero_user_segment(page, statret, end); | |
1712 | ret = copy_page_to_iter(page, | |
1713 | iocb->ki_pos & ~PAGE_MASK, | |
1714 | end - iocb->ki_pos, to); | |
1715 | iocb->ki_pos += ret; | |
fcc02d2a YZ |
1716 | read += ret; |
1717 | } | |
1718 | if (iocb->ki_pos < i_size && read < len) { | |
1719 | size_t zlen = min_t(size_t, len - read, | |
1720 | i_size - iocb->ki_pos); | |
1721 | ret = iov_iter_zero(zlen, to); | |
1722 | iocb->ki_pos += ret; | |
1723 | read += ret; | |
83701246 YZ |
1724 | } |
1725 | __free_pages(page, 0); | |
fcc02d2a | 1726 | return read; |
83701246 | 1727 | } |
6a026589 SW |
1728 | |
1729 | /* hit EOF or hole? */ | |
83701246 | 1730 | if (retry_op == CHECK_EOF && iocb->ki_pos < i_size && |
fcc02d2a | 1731 | ret < len) { |
8eb4efb0 | 1732 | dout("sync_read hit hole, ppos %lld < size %lld" |
99c88e69 | 1733 | ", reading more\n", iocb->ki_pos, i_size); |
8eb4efb0 | 1734 | |
6a026589 | 1735 | read += ret; |
6a026589 | 1736 | len -= ret; |
c8fe9b17 | 1737 | retry_op = HAVE_RETRIED; |
6a026589 SW |
1738 | goto again; |
1739 | } | |
1740 | } | |
8eb4efb0 | 1741 | |
6a026589 SW |
1742 | if (ret >= 0) |
1743 | ret += read; | |
1744 | ||
124e68e7 SW |
1745 | return ret; |
1746 | } | |
1747 | ||
1748 | /* | |
1749 | * Take cap references to avoid releasing caps to MDS mid-write. | |
1750 | * | |
1751 | * If we are synchronous, and write with an old snap context, the OSD | |
1752 | * may return EOLDSNAPC. In that case, retry the write.. _after_ | |
1753 | * dropping our cap refs and allowing the pending snap to logically | |
1754 | * complete _before_ this write occurs. | |
1755 | * | |
1756 | * If we are near ENOSPC, write synchronously. | |
1757 | */ | |
4908b822 | 1758 | static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) |
124e68e7 SW |
1759 | { |
1760 | struct file *file = iocb->ki_filp; | |
33caad32 | 1761 | struct ceph_file_info *fi = file->private_data; |
496ad9aa | 1762 | struct inode *inode = file_inode(file); |
124e68e7 | 1763 | struct ceph_inode_info *ci = ceph_inode(inode); |
8687a3e2 | 1764 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
76142097 | 1765 | struct ceph_osd_client *osdc = &fsc->client->osdc; |
f66fd9f0 | 1766 | struct ceph_cap_flush *prealloc_cf; |
3309dd04 | 1767 | ssize_t count, written = 0; |
94cc0877 | 1768 | int err, want = 0, got; |
8e4473bb | 1769 | bool direct_lock = false; |
76142097 ID |
1770 | u32 map_flags; |
1771 | u64 pool_flags; | |
3309dd04 | 1772 | loff_t pos; |
8687a3e2 | 1773 | loff_t limit = max(i_size_read(inode), fsc->max_file_size); |
124e68e7 | 1774 | |
5d6451b1 JL |
1775 | if (ceph_inode_is_shutdown(inode)) |
1776 | return -ESTALE; | |
1777 | ||
124e68e7 SW |
1778 | if (ceph_snap(inode) != CEPH_NOSNAP) |
1779 | return -EROFS; | |
1780 | ||
f66fd9f0 YZ |
1781 | prealloc_cf = ceph_alloc_cap_flush(); |
1782 | if (!prealloc_cf) | |
1783 | return -ENOMEM; | |
1784 | ||
8e4473bb XL |
1785 | if ((iocb->ki_flags & (IOCB_DIRECT | IOCB_APPEND)) == IOCB_DIRECT) |
1786 | direct_lock = true; | |
1787 | ||
a5cd74ad | 1788 | retry_snap: |
8e4473bb | 1789 | if (direct_lock) |
321fe13c JL |
1790 | ceph_start_io_direct(inode); |
1791 | else | |
1792 | ceph_start_io_write(inode); | |
03d254ed | 1793 | |
03d254ed | 1794 | /* We can write back this queue in page reclaim */ |
de1414a6 | 1795 | current->backing_dev_info = inode_to_bdi(inode); |
03d254ed | 1796 | |
55b0b31c YZ |
1797 | if (iocb->ki_flags & IOCB_APPEND) { |
1798 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); | |
1799 | if (err < 0) | |
1800 | goto out; | |
1801 | } | |
1802 | ||
3309dd04 AV |
1803 | err = generic_write_checks(iocb, from); |
1804 | if (err <= 0) | |
03d254ed YZ |
1805 | goto out; |
1806 | ||
3309dd04 | 1807 | pos = iocb->ki_pos; |
8687a3e2 CX |
1808 | if (unlikely(pos >= limit)) { |
1809 | err = -EFBIG; | |
1810 | goto out; | |
1811 | } else { | |
1812 | iov_iter_truncate(from, limit - pos); | |
1813 | } | |
1814 | ||
3309dd04 | 1815 | count = iov_iter_count(from); |
2b83845f LH |
1816 | if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) { |
1817 | err = -EDQUOT; | |
1818 | goto out; | |
1819 | } | |
1820 | ||
b11ed503 JL |
1821 | down_read(&osdc->lock); |
1822 | map_flags = osdc->osdmap->flags; | |
1823 | pool_flags = ceph_pg_pool_flags(osdc->osdmap, ci->i_layout.pool_id); | |
1824 | up_read(&osdc->lock); | |
1825 | if ((map_flags & CEPH_OSDMAP_FULL) || | |
1826 | (pool_flags & CEPH_POOL_FLAG_FULL)) { | |
1827 | err = -ENOSPC; | |
03d254ed | 1828 | goto out; |
b11ed503 | 1829 | } |
03d254ed | 1830 | |
b11ed503 | 1831 | err = file_remove_privs(file); |
03d254ed YZ |
1832 | if (err) |
1833 | goto out; | |
1834 | ||
ac7f29bf | 1835 | dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n", |
99c88e69 | 1836 | inode, ceph_vinop(inode), pos, count, i_size_read(inode)); |
94cc0877 JL |
1837 | if (!(fi->flags & CEPH_F_SYNC) && !direct_lock) |
1838 | want |= CEPH_CAP_FILE_BUFFER; | |
7971bd92 | 1839 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
94cc0877 | 1840 | want |= CEPH_CAP_FILE_LAZYIO; |
03d254ed | 1841 | got = 0; |
e72968e1 | 1842 | err = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, pos + count, &got); |
03d254ed | 1843 | if (err < 0) |
37505d57 | 1844 | goto out; |
124e68e7 | 1845 | |
b11ed503 JL |
1846 | err = file_update_time(file); |
1847 | if (err) | |
1848 | goto out_caps; | |
1849 | ||
1850 | inode_inc_iversion_raw(inode); | |
1851 | ||
ac7f29bf | 1852 | dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n", |
03d254ed | 1853 | inode, ceph_vinop(inode), pos, count, ceph_cap_string(got)); |
7971bd92 SW |
1854 | |
1855 | if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 || | |
26544c62 JL |
1856 | (iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) || |
1857 | (ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) { | |
5dda377c | 1858 | struct ceph_snap_context *snapc; |
4908b822 | 1859 | struct iov_iter data; |
5dda377c YZ |
1860 | |
1861 | spin_lock(&ci->i_ceph_lock); | |
1862 | if (__ceph_have_pending_cap_snap(ci)) { | |
1863 | struct ceph_cap_snap *capsnap = | |
1864 | list_last_entry(&ci->i_cap_snaps, | |
1865 | struct ceph_cap_snap, | |
1866 | ci_item); | |
1867 | snapc = ceph_get_snap_context(capsnap->context); | |
1868 | } else { | |
1869 | BUG_ON(!ci->i_head_snapc); | |
1870 | snapc = ceph_get_snap_context(ci->i_head_snapc); | |
1871 | } | |
1872 | spin_unlock(&ci->i_ceph_lock); | |
1873 | ||
4908b822 AV |
1874 | /* we might need to revert back to that point */ |
1875 | data = *from; | |
8e4473bb | 1876 | if (iocb->ki_flags & IOCB_DIRECT) |
c8fe9b17 YZ |
1877 | written = ceph_direct_read_write(iocb, &data, snapc, |
1878 | &prealloc_cf); | |
8e4473bb | 1879 | else |
5dda377c | 1880 | written = ceph_sync_write(iocb, &data, pos, snapc); |
8e4473bb XL |
1881 | if (direct_lock) |
1882 | ceph_end_io_direct(inode); | |
1883 | else | |
321fe13c | 1884 | ceph_end_io_write(inode); |
4908b822 AV |
1885 | if (written > 0) |
1886 | iov_iter_advance(from, written); | |
5dda377c | 1887 | ceph_put_snap_context(snapc); |
7971bd92 | 1888 | } else { |
b0d7c223 YZ |
1889 | /* |
1890 | * No need to acquire the i_truncate_mutex. Because | |
1891 | * the MDS revokes Fwb caps before sending truncate | |
1892 | * message to us. We can't get Fwb cap while there | |
1893 | * are pending vmtruncate. So write and vmtruncate | |
1894 | * can not run at the same time | |
1895 | */ | |
800ba295 | 1896 | written = generic_perform_write(iocb, from); |
aec605f4 AV |
1897 | if (likely(written >= 0)) |
1898 | iocb->ki_pos = pos + written; | |
321fe13c | 1899 | ceph_end_io_write(inode); |
7971bd92 | 1900 | } |
d8de9ab6 | 1901 | |
03d254ed | 1902 | if (written >= 0) { |
fca65b4a | 1903 | int dirty; |
1ab302a0 | 1904 | |
be655596 | 1905 | spin_lock(&ci->i_ceph_lock); |
f66fd9f0 YZ |
1906 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
1907 | &prealloc_cf); | |
be655596 | 1908 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
1909 | if (dirty) |
1910 | __mark_inode_dirty(inode, dirty); | |
1ab302a0 | 1911 | if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos)) |
e4b731cc | 1912 | ceph_check_caps(ci, CHECK_CAPS_FLUSH); |
124e68e7 | 1913 | } |
7971bd92 | 1914 | |
124e68e7 | 1915 | dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n", |
4908b822 | 1916 | inode, ceph_vinop(inode), pos, (unsigned)count, |
7971bd92 | 1917 | ceph_cap_string(got)); |
124e68e7 | 1918 | ceph_put_cap_refs(ci, got); |
7971bd92 | 1919 | |
a5cd74ad YZ |
1920 | if (written == -EOLDSNAPC) { |
1921 | dout("aio_write %p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n", | |
1922 | inode, ceph_vinop(inode), pos, (unsigned)count); | |
1923 | goto retry_snap; | |
1924 | } | |
1925 | ||
6aa657c8 | 1926 | if (written >= 0) { |
76142097 ID |
1927 | if ((map_flags & CEPH_OSDMAP_NEARFULL) || |
1928 | (pool_flags & CEPH_POOL_FLAG_NEARFULL)) | |
6aa657c8 | 1929 | iocb->ki_flags |= IOCB_DSYNC; |
6aa657c8 | 1930 | written = generic_write_sync(iocb, written); |
6070e0c1 | 1931 | } |
03d254ed | 1932 | |
2f75e9e1 | 1933 | goto out_unlocked; |
b11ed503 JL |
1934 | out_caps: |
1935 | ceph_put_cap_refs(ci, got); | |
03d254ed | 1936 | out: |
8e4473bb | 1937 | if (direct_lock) |
321fe13c JL |
1938 | ceph_end_io_direct(inode); |
1939 | else | |
1940 | ceph_end_io_write(inode); | |
2f75e9e1 | 1941 | out_unlocked: |
f66fd9f0 | 1942 | ceph_free_cap_flush(prealloc_cf); |
03d254ed | 1943 | current->backing_dev_info = NULL; |
03d254ed | 1944 | return written ? written : err; |
124e68e7 SW |
1945 | } |
1946 | ||
1947 | /* | |
1948 | * llseek. be sure to verify file size on SEEK_END. | |
1949 | */ | |
965c8e59 | 1950 | static loff_t ceph_llseek(struct file *file, loff_t offset, int whence) |
124e68e7 | 1951 | { |
965c8e59 | 1952 | if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) { |
e8214503 JL |
1953 | struct inode *inode = file_inode(file); |
1954 | int ret; | |
1955 | ||
508b32d8 | 1956 | ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); |
955818cd | 1957 | if (ret < 0) |
e8214503 | 1958 | return ret; |
124e68e7 | 1959 | } |
e8214503 | 1960 | return generic_file_llseek(file, offset, whence); |
124e68e7 SW |
1961 | } |
1962 | ||
ad7a60de LW |
1963 | static inline void ceph_zero_partial_page( |
1964 | struct inode *inode, loff_t offset, unsigned size) | |
1965 | { | |
1966 | struct page *page; | |
09cbfeaf | 1967 | pgoff_t index = offset >> PAGE_SHIFT; |
ad7a60de LW |
1968 | |
1969 | page = find_lock_page(inode->i_mapping, index); | |
1970 | if (page) { | |
1971 | wait_on_page_writeback(page); | |
09cbfeaf | 1972 | zero_user(page, offset & (PAGE_SIZE - 1), size); |
ad7a60de | 1973 | unlock_page(page); |
09cbfeaf | 1974 | put_page(page); |
ad7a60de LW |
1975 | } |
1976 | } | |
1977 | ||
1978 | static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset, | |
1979 | loff_t length) | |
1980 | { | |
09cbfeaf | 1981 | loff_t nearly = round_up(offset, PAGE_SIZE); |
ad7a60de LW |
1982 | if (offset < nearly) { |
1983 | loff_t size = nearly - offset; | |
1984 | if (length < size) | |
1985 | size = length; | |
1986 | ceph_zero_partial_page(inode, offset, size); | |
1987 | offset += size; | |
1988 | length -= size; | |
1989 | } | |
09cbfeaf KS |
1990 | if (length >= PAGE_SIZE) { |
1991 | loff_t size = round_down(length, PAGE_SIZE); | |
ad7a60de LW |
1992 | truncate_pagecache_range(inode, offset, offset + size - 1); |
1993 | offset += size; | |
1994 | length -= size; | |
1995 | } | |
1996 | if (length) | |
1997 | ceph_zero_partial_page(inode, offset, length); | |
1998 | } | |
1999 | ||
2000 | static int ceph_zero_partial_object(struct inode *inode, | |
2001 | loff_t offset, loff_t *length) | |
2002 | { | |
2003 | struct ceph_inode_info *ci = ceph_inode(inode); | |
2004 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
2005 | struct ceph_osd_request *req; | |
2006 | int ret = 0; | |
2007 | loff_t zero = 0; | |
2008 | int op; | |
2009 | ||
a68e564a XL |
2010 | if (ceph_inode_is_shutdown(inode)) |
2011 | return -EIO; | |
2012 | ||
ad7a60de LW |
2013 | if (!length) { |
2014 | op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE; | |
2015 | length = &zero; | |
2016 | } else { | |
2017 | op = CEPH_OSD_OP_ZERO; | |
2018 | } | |
2019 | ||
2020 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
2021 | ceph_vino(inode), | |
2022 | offset, length, | |
715e4cd4 | 2023 | 0, 1, op, |
54ea0046 | 2024 | CEPH_OSD_FLAG_WRITE, |
ad7a60de LW |
2025 | NULL, 0, 0, false); |
2026 | if (IS_ERR(req)) { | |
2027 | ret = PTR_ERR(req); | |
2028 | goto out; | |
2029 | } | |
2030 | ||
fac02ddf | 2031 | req->r_mtime = inode->i_mtime; |
a8af0d68 JL |
2032 | ceph_osdc_start_request(&fsc->client->osdc, req); |
2033 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
2034 | if (ret == -ENOENT) | |
2035 | ret = 0; | |
ad7a60de LW |
2036 | ceph_osdc_put_request(req); |
2037 | ||
2038 | out: | |
2039 | return ret; | |
2040 | } | |
2041 | ||
2042 | static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length) | |
2043 | { | |
2044 | int ret = 0; | |
2045 | struct ceph_inode_info *ci = ceph_inode(inode); | |
7627151e YZ |
2046 | s32 stripe_unit = ci->i_layout.stripe_unit; |
2047 | s32 stripe_count = ci->i_layout.stripe_count; | |
2048 | s32 object_size = ci->i_layout.object_size; | |
b314a90d SW |
2049 | u64 object_set_size = object_size * stripe_count; |
2050 | u64 nearly, t; | |
2051 | ||
2052 | /* round offset up to next period boundary */ | |
2053 | nearly = offset + object_set_size - 1; | |
2054 | t = nearly; | |
2055 | nearly -= do_div(t, object_set_size); | |
ad7a60de | 2056 | |
ad7a60de LW |
2057 | while (length && offset < nearly) { |
2058 | loff_t size = length; | |
2059 | ret = ceph_zero_partial_object(inode, offset, &size); | |
2060 | if (ret < 0) | |
2061 | return ret; | |
2062 | offset += size; | |
2063 | length -= size; | |
2064 | } | |
2065 | while (length >= object_set_size) { | |
2066 | int i; | |
2067 | loff_t pos = offset; | |
2068 | for (i = 0; i < stripe_count; ++i) { | |
2069 | ret = ceph_zero_partial_object(inode, pos, NULL); | |
2070 | if (ret < 0) | |
2071 | return ret; | |
2072 | pos += stripe_unit; | |
2073 | } | |
2074 | offset += object_set_size; | |
2075 | length -= object_set_size; | |
2076 | } | |
2077 | while (length) { | |
2078 | loff_t size = length; | |
2079 | ret = ceph_zero_partial_object(inode, offset, &size); | |
2080 | if (ret < 0) | |
2081 | return ret; | |
2082 | offset += size; | |
2083 | length -= size; | |
2084 | } | |
2085 | return ret; | |
2086 | } | |
2087 | ||
2088 | static long ceph_fallocate(struct file *file, int mode, | |
2089 | loff_t offset, loff_t length) | |
2090 | { | |
2091 | struct ceph_file_info *fi = file->private_data; | |
aa8b60e0 | 2092 | struct inode *inode = file_inode(file); |
ad7a60de | 2093 | struct ceph_inode_info *ci = ceph_inode(inode); |
f66fd9f0 | 2094 | struct ceph_cap_flush *prealloc_cf; |
ad7a60de LW |
2095 | int want, got = 0; |
2096 | int dirty; | |
2097 | int ret = 0; | |
2098 | loff_t endoff = 0; | |
2099 | loff_t size; | |
2100 | ||
e027253c XL |
2101 | dout("%s %p %llx.%llx mode %x, offset %llu length %llu\n", __func__, |
2102 | inode, ceph_vinop(inode), mode, offset, length); | |
2103 | ||
bddff633 | 2104 | if (mode != (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
494d77bf YZ |
2105 | return -EOPNOTSUPP; |
2106 | ||
ad7a60de LW |
2107 | if (!S_ISREG(inode->i_mode)) |
2108 | return -EOPNOTSUPP; | |
2109 | ||
f66fd9f0 YZ |
2110 | prealloc_cf = ceph_alloc_cap_flush(); |
2111 | if (!prealloc_cf) | |
2112 | return -ENOMEM; | |
2113 | ||
5955102c | 2114 | inode_lock(inode); |
ad7a60de LW |
2115 | |
2116 | if (ceph_snap(inode) != CEPH_NOSNAP) { | |
2117 | ret = -EROFS; | |
2118 | goto unlock; | |
2119 | } | |
2120 | ||
ad7a60de | 2121 | size = i_size_read(inode); |
bddff633 LH |
2122 | |
2123 | /* Are we punching a hole beyond EOF? */ | |
2124 | if (offset >= size) | |
2125 | goto unlock; | |
2126 | if ((offset + length) > size) | |
2127 | length = size - offset; | |
ad7a60de LW |
2128 | |
2129 | if (fi->fmode & CEPH_FILE_MODE_LAZY) | |
2130 | want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; | |
2131 | else | |
2132 | want = CEPH_CAP_FILE_BUFFER; | |
2133 | ||
e72968e1 | 2134 | ret = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, endoff, &got); |
ad7a60de LW |
2135 | if (ret < 0) |
2136 | goto unlock; | |
2137 | ||
e027253c XL |
2138 | ret = file_modified(file); |
2139 | if (ret) | |
2140 | goto put_caps; | |
2141 | ||
057ba5b2 | 2142 | filemap_invalidate_lock(inode->i_mapping); |
400e1286 | 2143 | ceph_fscache_invalidate(inode, false); |
bddff633 LH |
2144 | ceph_zero_pagecache_range(inode, offset, length); |
2145 | ret = ceph_zero_objects(inode, offset, length); | |
ad7a60de LW |
2146 | |
2147 | if (!ret) { | |
2148 | spin_lock(&ci->i_ceph_lock); | |
f66fd9f0 YZ |
2149 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
2150 | &prealloc_cf); | |
ad7a60de LW |
2151 | spin_unlock(&ci->i_ceph_lock); |
2152 | if (dirty) | |
2153 | __mark_inode_dirty(inode, dirty); | |
2154 | } | |
057ba5b2 | 2155 | filemap_invalidate_unlock(inode->i_mapping); |
ad7a60de | 2156 | |
e027253c | 2157 | put_caps: |
ad7a60de LW |
2158 | ceph_put_cap_refs(ci, got); |
2159 | unlock: | |
5955102c | 2160 | inode_unlock(inode); |
f66fd9f0 | 2161 | ceph_free_cap_flush(prealloc_cf); |
ad7a60de LW |
2162 | return ret; |
2163 | } | |
2164 | ||
503f82a9 LH |
2165 | /* |
2166 | * This function tries to get FILE_WR capabilities for dst_ci and FILE_RD for | |
2167 | * src_ci. Two attempts are made to obtain both caps, and an error is return if | |
2168 | * this fails; zero is returned on success. | |
2169 | */ | |
5e3ded1b YZ |
2170 | static int get_rd_wr_caps(struct file *src_filp, int *src_got, |
2171 | struct file *dst_filp, | |
503f82a9 LH |
2172 | loff_t dst_endoff, int *dst_got) |
2173 | { | |
2174 | int ret = 0; | |
2175 | bool retrying = false; | |
2176 | ||
2177 | retry_caps: | |
5e3ded1b | 2178 | ret = ceph_get_caps(dst_filp, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER, |
e72968e1 | 2179 | dst_endoff, dst_got); |
503f82a9 LH |
2180 | if (ret < 0) |
2181 | return ret; | |
2182 | ||
2183 | /* | |
2184 | * Since we're already holding the FILE_WR capability for the dst file, | |
2185 | * we would risk a deadlock by using ceph_get_caps. Thus, we'll do some | |
2186 | * retry dance instead to try to get both capabilities. | |
2187 | */ | |
5e3ded1b YZ |
2188 | ret = ceph_try_get_caps(file_inode(src_filp), |
2189 | CEPH_CAP_FILE_RD, CEPH_CAP_FILE_SHARED, | |
503f82a9 LH |
2190 | false, src_got); |
2191 | if (ret <= 0) { | |
2192 | /* Start by dropping dst_ci caps and getting src_ci caps */ | |
5e3ded1b | 2193 | ceph_put_cap_refs(ceph_inode(file_inode(dst_filp)), *dst_got); |
503f82a9 LH |
2194 | if (retrying) { |
2195 | if (!ret) | |
2196 | /* ceph_try_get_caps masks EAGAIN */ | |
2197 | ret = -EAGAIN; | |
2198 | return ret; | |
2199 | } | |
5e3ded1b | 2200 | ret = ceph_get_caps(src_filp, CEPH_CAP_FILE_RD, |
e72968e1 | 2201 | CEPH_CAP_FILE_SHARED, -1, src_got); |
503f82a9 LH |
2202 | if (ret < 0) |
2203 | return ret; | |
2204 | /*... drop src_ci caps too, and retry */ | |
5e3ded1b | 2205 | ceph_put_cap_refs(ceph_inode(file_inode(src_filp)), *src_got); |
503f82a9 LH |
2206 | retrying = true; |
2207 | goto retry_caps; | |
2208 | } | |
2209 | return ret; | |
2210 | } | |
2211 | ||
2212 | static void put_rd_wr_caps(struct ceph_inode_info *src_ci, int src_got, | |
2213 | struct ceph_inode_info *dst_ci, int dst_got) | |
2214 | { | |
2215 | ceph_put_cap_refs(src_ci, src_got); | |
2216 | ceph_put_cap_refs(dst_ci, dst_got); | |
2217 | } | |
2218 | ||
2219 | /* | |
2220 | * This function does several size-related checks, returning an error if: | |
2221 | * - source file is smaller than off+len | |
2222 | * - destination file size is not OK (inode_newsize_ok()) | |
2223 | * - max bytes quotas is exceeded | |
2224 | */ | |
2225 | static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode, | |
2226 | loff_t src_off, loff_t dst_off, size_t len) | |
2227 | { | |
2228 | loff_t size, endoff; | |
2229 | ||
2230 | size = i_size_read(src_inode); | |
2231 | /* | |
2232 | * Don't copy beyond source file EOF. Instead of simply setting length | |
2233 | * to (size - src_off), just drop to VFS default implementation, as the | |
2234 | * local i_size may be stale due to other clients writing to the source | |
2235 | * inode. | |
2236 | */ | |
2237 | if (src_off + len > size) { | |
2238 | dout("Copy beyond EOF (%llu + %zu > %llu)\n", | |
2239 | src_off, len, size); | |
2240 | return -EOPNOTSUPP; | |
2241 | } | |
2242 | size = i_size_read(dst_inode); | |
2243 | ||
2244 | endoff = dst_off + len; | |
2245 | if (inode_newsize_ok(dst_inode, endoff)) | |
2246 | return -EOPNOTSUPP; | |
2247 | ||
2248 | if (ceph_quota_is_max_bytes_exceeded(dst_inode, endoff)) | |
2249 | return -EDQUOT; | |
2250 | ||
2251 | return 0; | |
2252 | } | |
2253 | ||
aca39d9e LH |
2254 | static struct ceph_osd_request * |
2255 | ceph_alloc_copyfrom_request(struct ceph_osd_client *osdc, | |
2256 | u64 src_snapid, | |
2257 | struct ceph_object_id *src_oid, | |
2258 | struct ceph_object_locator *src_oloc, | |
2259 | struct ceph_object_id *dst_oid, | |
2260 | struct ceph_object_locator *dst_oloc, | |
2261 | u32 truncate_seq, u64 truncate_size) | |
2262 | { | |
2263 | struct ceph_osd_request *req; | |
2264 | int ret; | |
2265 | u32 src_fadvise_flags = | |
2266 | CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL | | |
2267 | CEPH_OSD_OP_FLAG_FADVISE_NOCACHE; | |
2268 | u32 dst_fadvise_flags = | |
2269 | CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL | | |
2270 | CEPH_OSD_OP_FLAG_FADVISE_DONTNEED; | |
2271 | ||
2272 | req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL); | |
2273 | if (!req) | |
2274 | return ERR_PTR(-ENOMEM); | |
2275 | ||
2276 | req->r_flags = CEPH_OSD_FLAG_WRITE; | |
2277 | ||
2278 | ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc); | |
2279 | ceph_oid_copy(&req->r_t.base_oid, dst_oid); | |
2280 | ||
2281 | ret = osd_req_op_copy_from_init(req, src_snapid, 0, | |
2282 | src_oid, src_oloc, | |
2283 | src_fadvise_flags, | |
2284 | dst_fadvise_flags, | |
2285 | truncate_seq, | |
2286 | truncate_size, | |
2287 | CEPH_OSD_COPY_FROM_FLAG_TRUNCATE_SEQ); | |
2288 | if (ret) | |
2289 | goto out; | |
2290 | ||
2291 | ret = ceph_osdc_alloc_messages(req, GFP_KERNEL); | |
2292 | if (ret) | |
2293 | goto out; | |
2294 | ||
2295 | return req; | |
2296 | ||
2297 | out: | |
2298 | ceph_osdc_put_request(req); | |
2299 | return ERR_PTR(ret); | |
2300 | } | |
2301 | ||
1b0c3b9f LH |
2302 | static ssize_t ceph_do_objects_copy(struct ceph_inode_info *src_ci, u64 *src_off, |
2303 | struct ceph_inode_info *dst_ci, u64 *dst_off, | |
2304 | struct ceph_fs_client *fsc, | |
2305 | size_t len, unsigned int flags) | |
2306 | { | |
2307 | struct ceph_object_locator src_oloc, dst_oloc; | |
2308 | struct ceph_object_id src_oid, dst_oid; | |
aca39d9e LH |
2309 | struct ceph_osd_client *osdc; |
2310 | struct ceph_osd_request *req; | |
1b0c3b9f LH |
2311 | size_t bytes = 0; |
2312 | u64 src_objnum, src_objoff, dst_objnum, dst_objoff; | |
2313 | u32 src_objlen, dst_objlen; | |
2314 | u32 object_size = src_ci->i_layout.object_size; | |
2315 | int ret; | |
2316 | ||
2317 | src_oloc.pool = src_ci->i_layout.pool_id; | |
2318 | src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns); | |
2319 | dst_oloc.pool = dst_ci->i_layout.pool_id; | |
2320 | dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns); | |
aca39d9e | 2321 | osdc = &fsc->client->osdc; |
1b0c3b9f LH |
2322 | |
2323 | while (len >= object_size) { | |
2324 | ceph_calc_file_object_mapping(&src_ci->i_layout, *src_off, | |
2325 | object_size, &src_objnum, | |
2326 | &src_objoff, &src_objlen); | |
2327 | ceph_calc_file_object_mapping(&dst_ci->i_layout, *dst_off, | |
2328 | object_size, &dst_objnum, | |
2329 | &dst_objoff, &dst_objlen); | |
2330 | ceph_oid_init(&src_oid); | |
2331 | ceph_oid_printf(&src_oid, "%llx.%08llx", | |
2332 | src_ci->i_vino.ino, src_objnum); | |
2333 | ceph_oid_init(&dst_oid); | |
2334 | ceph_oid_printf(&dst_oid, "%llx.%08llx", | |
2335 | dst_ci->i_vino.ino, dst_objnum); | |
2336 | /* Do an object remote copy */ | |
aca39d9e LH |
2337 | req = ceph_alloc_copyfrom_request(osdc, src_ci->i_vino.snap, |
2338 | &src_oid, &src_oloc, | |
2339 | &dst_oid, &dst_oloc, | |
2340 | dst_ci->i_truncate_seq, | |
2341 | dst_ci->i_truncate_size); | |
2342 | if (IS_ERR(req)) | |
2343 | ret = PTR_ERR(req); | |
2344 | else { | |
a8af0d68 | 2345 | ceph_osdc_start_request(osdc, req); |
aca39d9e | 2346 | ret = ceph_osdc_wait_request(osdc, req); |
c02cb7bd LH |
2347 | ceph_update_copyfrom_metrics(&fsc->mdsc->metric, |
2348 | req->r_start_latency, | |
2349 | req->r_end_latency, | |
2350 | object_size, ret); | |
aca39d9e LH |
2351 | ceph_osdc_put_request(req); |
2352 | } | |
1b0c3b9f LH |
2353 | if (ret) { |
2354 | if (ret == -EOPNOTSUPP) { | |
2355 | fsc->have_copy_from2 = false; | |
2356 | pr_notice("OSDs don't support copy-from2; disabling copy offload\n"); | |
2357 | } | |
2358 | dout("ceph_osdc_copy_from returned %d\n", ret); | |
2359 | if (!bytes) | |
2360 | bytes = ret; | |
2361 | goto out; | |
2362 | } | |
2363 | len -= object_size; | |
2364 | bytes += object_size; | |
2365 | *src_off += object_size; | |
2366 | *dst_off += object_size; | |
2367 | } | |
2368 | ||
2369 | out: | |
2370 | ceph_oloc_destroy(&src_oloc); | |
2371 | ceph_oloc_destroy(&dst_oloc); | |
2372 | return bytes; | |
2373 | } | |
2374 | ||
64bf5ff5 DC |
2375 | static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off, |
2376 | struct file *dst_file, loff_t dst_off, | |
2377 | size_t len, unsigned int flags) | |
503f82a9 LH |
2378 | { |
2379 | struct inode *src_inode = file_inode(src_file); | |
2380 | struct inode *dst_inode = file_inode(dst_file); | |
2381 | struct ceph_inode_info *src_ci = ceph_inode(src_inode); | |
2382 | struct ceph_inode_info *dst_ci = ceph_inode(dst_inode); | |
2383 | struct ceph_cap_flush *prealloc_cf; | |
6fd4e634 | 2384 | struct ceph_fs_client *src_fsc = ceph_inode_to_client(src_inode); |
1b0c3b9f LH |
2385 | loff_t size; |
2386 | ssize_t ret = -EIO, bytes; | |
503f82a9 | 2387 | u64 src_objnum, dst_objnum, src_objoff, dst_objoff; |
1b0c3b9f | 2388 | u32 src_objlen, dst_objlen; |
503f82a9 | 2389 | int src_got = 0, dst_got = 0, err, dirty; |
503f82a9 | 2390 | |
6fd4e634 LH |
2391 | if (src_inode->i_sb != dst_inode->i_sb) { |
2392 | struct ceph_fs_client *dst_fsc = ceph_inode_to_client(dst_inode); | |
2393 | ||
2394 | if (ceph_fsid_compare(&src_fsc->client->fsid, | |
2395 | &dst_fsc->client->fsid)) { | |
2396 | dout("Copying files across clusters: src: %pU dst: %pU\n", | |
2397 | &src_fsc->client->fsid, &dst_fsc->client->fsid); | |
2398 | return -EXDEV; | |
2399 | } | |
2400 | } | |
503f82a9 LH |
2401 | if (ceph_snap(dst_inode) != CEPH_NOSNAP) |
2402 | return -EROFS; | |
2403 | ||
2404 | /* | |
2405 | * Some of the checks below will return -EOPNOTSUPP, which will force a | |
2406 | * fallback to the default VFS copy_file_range implementation. This is | |
2407 | * desirable in several cases (for ex, the 'len' is smaller than the | |
2408 | * size of the objects, or in cases where that would be more | |
2409 | * efficient). | |
2410 | */ | |
2411 | ||
6fd4e634 | 2412 | if (ceph_test_mount_opt(src_fsc, NOCOPYFROM)) |
ea4cdc54 LH |
2413 | return -EOPNOTSUPP; |
2414 | ||
78beb0ff LH |
2415 | if (!src_fsc->have_copy_from2) |
2416 | return -EOPNOTSUPP; | |
2417 | ||
a3a08193 LH |
2418 | /* |
2419 | * Striped file layouts require that we copy partial objects, but the | |
2420 | * OSD copy-from operation only supports full-object copies. Limit | |
2421 | * this to non-striped file layouts for now. | |
2422 | */ | |
503f82a9 | 2423 | if ((src_ci->i_layout.stripe_unit != dst_ci->i_layout.stripe_unit) || |
a3a08193 LH |
2424 | (src_ci->i_layout.stripe_count != 1) || |
2425 | (dst_ci->i_layout.stripe_count != 1) || | |
2426 | (src_ci->i_layout.object_size != dst_ci->i_layout.object_size)) { | |
2427 | dout("Invalid src/dst files layout\n"); | |
503f82a9 | 2428 | return -EOPNOTSUPP; |
a3a08193 | 2429 | } |
503f82a9 LH |
2430 | |
2431 | if (len < src_ci->i_layout.object_size) | |
2432 | return -EOPNOTSUPP; /* no remote copy will be done */ | |
2433 | ||
2434 | prealloc_cf = ceph_alloc_cap_flush(); | |
2435 | if (!prealloc_cf) | |
2436 | return -ENOMEM; | |
2437 | ||
c2c6d3ce | 2438 | /* Start by sync'ing the source and destination files */ |
503f82a9 | 2439 | ret = file_write_and_wait_range(src_file, src_off, (src_off + len)); |
c2c6d3ce LH |
2440 | if (ret < 0) { |
2441 | dout("failed to write src file (%zd)\n", ret); | |
2442 | goto out; | |
2443 | } | |
2444 | ret = file_write_and_wait_range(dst_file, dst_off, (dst_off + len)); | |
2445 | if (ret < 0) { | |
2446 | dout("failed to write dst file (%zd)\n", ret); | |
503f82a9 | 2447 | goto out; |
c2c6d3ce | 2448 | } |
503f82a9 LH |
2449 | |
2450 | /* | |
2451 | * We need FILE_WR caps for dst_ci and FILE_RD for src_ci as other | |
2452 | * clients may have dirty data in their caches. And OSDs know nothing | |
2453 | * about caps, so they can't safely do the remote object copies. | |
2454 | */ | |
5e3ded1b YZ |
2455 | err = get_rd_wr_caps(src_file, &src_got, |
2456 | dst_file, (dst_off + len), &dst_got); | |
503f82a9 LH |
2457 | if (err < 0) { |
2458 | dout("get_rd_wr_caps returned %d\n", err); | |
2459 | ret = -EOPNOTSUPP; | |
2460 | goto out; | |
2461 | } | |
2462 | ||
2463 | ret = is_file_size_ok(src_inode, dst_inode, src_off, dst_off, len); | |
2464 | if (ret < 0) | |
2465 | goto out_caps; | |
2466 | ||
503f82a9 | 2467 | /* Drop dst file cached pages */ |
400e1286 | 2468 | ceph_fscache_invalidate(dst_inode, false); |
503f82a9 LH |
2469 | ret = invalidate_inode_pages2_range(dst_inode->i_mapping, |
2470 | dst_off >> PAGE_SHIFT, | |
1b0c3b9f | 2471 | (dst_off + len) >> PAGE_SHIFT); |
503f82a9 LH |
2472 | if (ret < 0) { |
2473 | dout("Failed to invalidate inode pages (%zd)\n", ret); | |
2474 | ret = 0; /* XXX */ | |
2475 | } | |
503f82a9 LH |
2476 | ceph_calc_file_object_mapping(&src_ci->i_layout, src_off, |
2477 | src_ci->i_layout.object_size, | |
2478 | &src_objnum, &src_objoff, &src_objlen); | |
2479 | ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off, | |
2480 | dst_ci->i_layout.object_size, | |
2481 | &dst_objnum, &dst_objoff, &dst_objlen); | |
2482 | /* object-level offsets need to the same */ | |
2483 | if (src_objoff != dst_objoff) { | |
2484 | ret = -EOPNOTSUPP; | |
2485 | goto out_caps; | |
2486 | } | |
2487 | ||
2488 | /* | |
2489 | * Do a manual copy if the object offset isn't object aligned. | |
2490 | * 'src_objlen' contains the bytes left until the end of the object, | |
2491 | * starting at the src_off | |
2492 | */ | |
2493 | if (src_objoff) { | |
1b0c3b9f LH |
2494 | dout("Initial partial copy of %u bytes\n", src_objlen); |
2495 | ||
503f82a9 LH |
2496 | /* |
2497 | * we need to temporarily drop all caps as we'll be calling | |
2498 | * {read,write}_iter, which will get caps again. | |
2499 | */ | |
2500 | put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got); | |
2501 | ret = do_splice_direct(src_file, &src_off, dst_file, | |
2502 | &dst_off, src_objlen, flags); | |
1b0c3b9f LH |
2503 | /* Abort on short copies or on error */ |
2504 | if (ret < src_objlen) { | |
2505 | dout("Failed partial copy (%zd)\n", ret); | |
503f82a9 LH |
2506 | goto out; |
2507 | } | |
2508 | len -= ret; | |
5e3ded1b YZ |
2509 | err = get_rd_wr_caps(src_file, &src_got, |
2510 | dst_file, (dst_off + len), &dst_got); | |
503f82a9 LH |
2511 | if (err < 0) |
2512 | goto out; | |
2513 | err = is_file_size_ok(src_inode, dst_inode, | |
2514 | src_off, dst_off, len); | |
2515 | if (err < 0) | |
2516 | goto out_caps; | |
2517 | } | |
503f82a9 | 2518 | |
1b0c3b9f LH |
2519 | size = i_size_read(dst_inode); |
2520 | bytes = ceph_do_objects_copy(src_ci, &src_off, dst_ci, &dst_off, | |
2521 | src_fsc, len, flags); | |
2522 | if (bytes <= 0) { | |
2523 | if (!ret) | |
2524 | ret = bytes; | |
2525 | goto out_caps; | |
2526 | } | |
2527 | dout("Copied %zu bytes out of %zu\n", bytes, len); | |
2528 | len -= bytes; | |
2529 | ret += bytes; | |
503f82a9 LH |
2530 | |
2531 | file_update_time(dst_file); | |
5c308356 JL |
2532 | inode_inc_iversion_raw(dst_inode); |
2533 | ||
1b0c3b9f | 2534 | if (dst_off > size) { |
503f82a9 | 2535 | /* Let the MDS know about dst file size change */ |
a0d93e32 YZ |
2536 | if (ceph_inode_set_size(dst_inode, dst_off) || |
2537 | ceph_quota_is_max_bytes_approaching(dst_inode, dst_off)) | |
e4b731cc | 2538 | ceph_check_caps(dst_ci, CHECK_CAPS_AUTHONLY | CHECK_CAPS_FLUSH); |
503f82a9 LH |
2539 | } |
2540 | /* Mark Fw dirty */ | |
2541 | spin_lock(&dst_ci->i_ceph_lock); | |
503f82a9 LH |
2542 | dirty = __ceph_mark_dirty_caps(dst_ci, CEPH_CAP_FILE_WR, &prealloc_cf); |
2543 | spin_unlock(&dst_ci->i_ceph_lock); | |
2544 | if (dirty) | |
2545 | __mark_inode_dirty(dst_inode, dirty); | |
2546 | ||
2547 | out_caps: | |
2548 | put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got); | |
2549 | ||
1b0c3b9f LH |
2550 | /* |
2551 | * Do the final manual copy if we still have some bytes left, unless | |
2552 | * there were errors in remote object copies (len >= object_size). | |
2553 | */ | |
2554 | if (len && (len < src_ci->i_layout.object_size)) { | |
2555 | dout("Final partial copy of %zu bytes\n", len); | |
2556 | bytes = do_splice_direct(src_file, &src_off, dst_file, | |
2557 | &dst_off, len, flags); | |
2558 | if (bytes > 0) | |
2559 | ret += bytes; | |
2560 | else | |
2561 | dout("Failed partial copy (%zd)\n", bytes); | |
503f82a9 LH |
2562 | } |
2563 | ||
2564 | out: | |
2565 | ceph_free_cap_flush(prealloc_cf); | |
2566 | ||
2567 | return ret; | |
2568 | } | |
2569 | ||
64bf5ff5 DC |
2570 | static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off, |
2571 | struct file *dst_file, loff_t dst_off, | |
2572 | size_t len, unsigned int flags) | |
2573 | { | |
2574 | ssize_t ret; | |
2575 | ||
2576 | ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off, | |
2577 | len, flags); | |
2578 | ||
5dae222a | 2579 | if (ret == -EOPNOTSUPP || ret == -EXDEV) |
64bf5ff5 DC |
2580 | ret = generic_copy_file_range(src_file, src_off, dst_file, |
2581 | dst_off, len, flags); | |
2582 | return ret; | |
2583 | } | |
2584 | ||
124e68e7 SW |
2585 | const struct file_operations ceph_file_fops = { |
2586 | .open = ceph_open, | |
2587 | .release = ceph_release, | |
2588 | .llseek = ceph_llseek, | |
3644424d | 2589 | .read_iter = ceph_read_iter, |
4908b822 | 2590 | .write_iter = ceph_write_iter, |
124e68e7 SW |
2591 | .mmap = ceph_mmap, |
2592 | .fsync = ceph_fsync, | |
40819f6f | 2593 | .lock = ceph_lock, |
496ceaf1 | 2594 | .setlease = simple_nosetlease, |
40819f6f | 2595 | .flock = ceph_flock, |
7ce469a5 | 2596 | .splice_read = generic_file_splice_read, |
3551dd79 | 2597 | .splice_write = iter_file_splice_write, |
124e68e7 | 2598 | .unlocked_ioctl = ceph_ioctl, |
18bd6caa | 2599 | .compat_ioctl = compat_ptr_ioctl, |
ad7a60de | 2600 | .fallocate = ceph_fallocate, |
503f82a9 | 2601 | .copy_file_range = ceph_copy_file_range, |
124e68e7 | 2602 | }; |