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