Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
124e68e7 | 3 | |
3d14c5d2 | 4 | #include <linux/module.h> |
124e68e7 | 5 | #include <linux/sched.h> |
5a0e3ad6 | 6 | #include <linux/slab.h> |
124e68e7 | 7 | #include <linux/file.h> |
5ef50c3b | 8 | #include <linux/mount.h> |
124e68e7 SW |
9 | #include <linux/namei.h> |
10 | #include <linux/writeback.h> | |
ad7a60de | 11 | #include <linux/falloc.h> |
124e68e7 SW |
12 | |
13 | #include "super.h" | |
14 | #include "mds_client.h" | |
99ccbd22 | 15 | #include "cache.h" |
124e68e7 | 16 | |
f775ff7d AG |
17 | static __le32 ceph_flags_sys2wire(u32 flags) |
18 | { | |
19 | u32 wire_flags = 0; | |
20 | ||
21 | switch (flags & O_ACCMODE) { | |
22 | case O_RDONLY: | |
23 | wire_flags |= CEPH_O_RDONLY; | |
24 | break; | |
25 | case O_WRONLY: | |
26 | wire_flags |= CEPH_O_WRONLY; | |
27 | break; | |
28 | case O_RDWR: | |
29 | wire_flags |= CEPH_O_RDWR; | |
30 | break; | |
31 | } | |
32 | ||
51b10f3f CX |
33 | flags &= ~O_ACCMODE; |
34 | ||
f775ff7d AG |
35 | #define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; } |
36 | ||
37 | ceph_sys2wire(O_CREAT); | |
38 | ceph_sys2wire(O_EXCL); | |
39 | ceph_sys2wire(O_TRUNC); | |
40 | ceph_sys2wire(O_DIRECTORY); | |
41 | ceph_sys2wire(O_NOFOLLOW); | |
42 | ||
43 | #undef ceph_sys2wire | |
44 | ||
45 | if (flags) | |
4c069a58 | 46 | dout("unused open flags: %x\n", flags); |
f775ff7d AG |
47 | |
48 | return cpu_to_le32(wire_flags); | |
49 | } | |
50 | ||
124e68e7 SW |
51 | /* |
52 | * Ceph file operations | |
53 | * | |
54 | * Implement basic open/close functionality, and implement | |
55 | * read/write. | |
56 | * | |
57 | * We implement three modes of file I/O: | |
58 | * - buffered uses the generic_file_aio_{read,write} helpers | |
59 | * | |
60 | * - synchronous is used when there is multi-client read/write | |
61 | * sharing, avoids the page cache, and synchronously waits for an | |
62 | * ack from the OSD. | |
63 | * | |
64 | * - direct io takes the variant of the sync path that references | |
65 | * user pages directly. | |
66 | * | |
67 | * fsync() flushes and waits on dirty pages, but just queues metadata | |
68 | * for writeback: since the MDS can recover size and mtime there is no | |
69 | * need to wait for MDS acknowledgement. | |
70 | */ | |
71 | ||
b5b98989 ZC |
72 | /* |
73 | * Calculate the length sum of direct io vectors that can | |
74 | * be combined into one page vector. | |
75 | */ | |
76 | static size_t dio_get_pagev_size(const struct iov_iter *it) | |
77 | { | |
78 | const struct iovec *iov = it->iov; | |
79 | const struct iovec *iovend = iov + it->nr_segs; | |
80 | size_t size; | |
81 | ||
82 | size = iov->iov_len - it->iov_offset; | |
83 | /* | |
84 | * An iov can be page vectored when both the current tail | |
85 | * and the next base are page aligned. | |
86 | */ | |
87 | while (PAGE_ALIGNED((iov->iov_base + iov->iov_len)) && | |
88 | (++iov < iovend && PAGE_ALIGNED((iov->iov_base)))) { | |
89 | size += iov->iov_len; | |
90 | } | |
91 | dout("dio_get_pagevlen len = %zu\n", size); | |
92 | return size; | |
93 | } | |
94 | ||
95 | /* | |
96 | * Allocate a page vector based on (@it, @nbytes). | |
97 | * The return value is the tuple describing a page vector, | |
98 | * that is (@pages, @page_align, @num_pages). | |
99 | */ | |
100 | static struct page ** | |
101 | dio_get_pages_alloc(const struct iov_iter *it, size_t nbytes, | |
102 | size_t *page_align, int *num_pages) | |
103 | { | |
104 | struct iov_iter tmp_it = *it; | |
105 | size_t align; | |
106 | struct page **pages; | |
107 | int ret = 0, idx, npages; | |
108 | ||
109 | align = (unsigned long)(it->iov->iov_base + it->iov_offset) & | |
110 | (PAGE_SIZE - 1); | |
111 | npages = calc_pages_for(align, nbytes); | |
752ade68 MH |
112 | pages = kvmalloc(sizeof(*pages) * npages, GFP_KERNEL); |
113 | if (!pages) | |
114 | return ERR_PTR(-ENOMEM); | |
b5b98989 ZC |
115 | |
116 | for (idx = 0; idx < npages; ) { | |
117 | size_t start; | |
118 | ret = iov_iter_get_pages(&tmp_it, pages + idx, nbytes, | |
119 | npages - idx, &start); | |
120 | if (ret < 0) | |
121 | goto fail; | |
122 | ||
123 | iov_iter_advance(&tmp_it, ret); | |
124 | nbytes -= ret; | |
125 | idx += (ret + start + PAGE_SIZE - 1) / PAGE_SIZE; | |
126 | } | |
127 | ||
128 | BUG_ON(nbytes != 0); | |
129 | *num_pages = npages; | |
130 | *page_align = align; | |
131 | dout("dio_get_pages_alloc: got %d pages align %zu\n", npages, align); | |
132 | return pages; | |
133 | fail: | |
134 | ceph_put_page_vector(pages, idx, false); | |
135 | return ERR_PTR(ret); | |
136 | } | |
124e68e7 SW |
137 | |
138 | /* | |
139 | * Prepare an open request. Preallocate ceph_cap to avoid an | |
140 | * inopportune ENOMEM later. | |
141 | */ | |
142 | static struct ceph_mds_request * | |
143 | prepare_open_request(struct super_block *sb, int flags, int create_mode) | |
144 | { | |
3d14c5d2 YS |
145 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
146 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
124e68e7 SW |
147 | struct ceph_mds_request *req; |
148 | int want_auth = USE_ANY_MDS; | |
149 | int op = (flags & O_CREAT) ? CEPH_MDS_OP_CREATE : CEPH_MDS_OP_OPEN; | |
150 | ||
151 | if (flags & (O_WRONLY|O_RDWR|O_CREAT|O_TRUNC)) | |
152 | want_auth = USE_AUTH_MDS; | |
153 | ||
154 | req = ceph_mdsc_create_request(mdsc, op, want_auth); | |
155 | if (IS_ERR(req)) | |
156 | goto out; | |
157 | req->r_fmode = ceph_flags_to_mode(flags); | |
f775ff7d | 158 | req->r_args.open.flags = ceph_flags_sys2wire(flags); |
124e68e7 | 159 | req->r_args.open.mode = cpu_to_le32(create_mode); |
124e68e7 SW |
160 | out: |
161 | return req; | |
162 | } | |
163 | ||
bb48bd4d CX |
164 | static int ceph_init_file_info(struct inode *inode, struct file *file, |
165 | int fmode, bool isdir) | |
166 | { | |
167 | struct ceph_file_info *fi; | |
168 | ||
169 | dout("%s %p %p 0%o (%s)\n", __func__, inode, file, | |
170 | inode->i_mode, isdir ? "dir" : "regular"); | |
171 | BUG_ON(inode->i_fop->release != ceph_release); | |
172 | ||
173 | if (isdir) { | |
174 | struct ceph_dir_file_info *dfi = | |
175 | kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL); | |
176 | if (!dfi) { | |
177 | ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */ | |
178 | return -ENOMEM; | |
179 | } | |
180 | ||
181 | file->private_data = dfi; | |
182 | fi = &dfi->file_info; | |
183 | dfi->next_offset = 2; | |
184 | dfi->readdir_cache_idx = -1; | |
185 | } else { | |
186 | fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL); | |
187 | if (!fi) { | |
188 | ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */ | |
189 | return -ENOMEM; | |
190 | } | |
191 | ||
192 | file->private_data = fi; | |
193 | } | |
194 | ||
195 | fi->fmode = fmode; | |
196 | spin_lock_init(&fi->rw_contexts_lock); | |
197 | INIT_LIST_HEAD(&fi->rw_contexts); | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
124e68e7 SW |
202 | /* |
203 | * initialize private struct file data. | |
204 | * if we fail, clean up by dropping fmode reference on the ceph_inode | |
205 | */ | |
206 | static int ceph_init_file(struct inode *inode, struct file *file, int fmode) | |
207 | { | |
124e68e7 SW |
208 | int ret = 0; |
209 | ||
210 | switch (inode->i_mode & S_IFMT) { | |
211 | case S_IFREG: | |
46b59b2b YZ |
212 | ceph_fscache_register_inode_cookie(inode); |
213 | ceph_fscache_file_set_cookie(inode, file); | |
124e68e7 | 214 | case S_IFDIR: |
bb48bd4d CX |
215 | ret = ceph_init_file_info(inode, file, fmode, |
216 | S_ISDIR(inode->i_mode)); | |
217 | if (ret) | |
218 | return ret; | |
124e68e7 SW |
219 | break; |
220 | ||
221 | case S_IFLNK: | |
222 | dout("init_file %p %p 0%o (symlink)\n", inode, file, | |
223 | inode->i_mode); | |
224 | ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */ | |
225 | break; | |
226 | ||
227 | default: | |
228 | dout("init_file %p %p 0%o (special)\n", inode, file, | |
229 | inode->i_mode); | |
230 | /* | |
231 | * we need to drop the open ref now, since we don't | |
232 | * have .release set to ceph_release. | |
233 | */ | |
234 | ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */ | |
235 | BUG_ON(inode->i_fop->release == ceph_release); | |
236 | ||
237 | /* call the proper open fop */ | |
238 | ret = inode->i_fop->open(inode, file); | |
239 | } | |
240 | return ret; | |
241 | } | |
242 | ||
77310320 YZ |
243 | /* |
244 | * try renew caps after session gets killed. | |
245 | */ | |
246 | int ceph_renew_caps(struct inode *inode) | |
247 | { | |
248 | struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; | |
249 | struct ceph_inode_info *ci = ceph_inode(inode); | |
250 | struct ceph_mds_request *req; | |
251 | int err, flags, wanted; | |
252 | ||
253 | spin_lock(&ci->i_ceph_lock); | |
254 | wanted = __ceph_caps_file_wanted(ci); | |
255 | if (__ceph_is_any_real_caps(ci) && | |
8242c9f3 | 256 | (!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) { |
77310320 YZ |
257 | int issued = __ceph_caps_issued(ci, NULL); |
258 | spin_unlock(&ci->i_ceph_lock); | |
259 | dout("renew caps %p want %s issued %s updating mds_wanted\n", | |
260 | inode, ceph_cap_string(wanted), ceph_cap_string(issued)); | |
261 | ceph_check_caps(ci, 0, NULL); | |
262 | return 0; | |
263 | } | |
264 | spin_unlock(&ci->i_ceph_lock); | |
265 | ||
266 | flags = 0; | |
267 | if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR)) | |
268 | flags = O_RDWR; | |
269 | else if (wanted & CEPH_CAP_FILE_RD) | |
270 | flags = O_RDONLY; | |
271 | else if (wanted & CEPH_CAP_FILE_WR) | |
272 | flags = O_WRONLY; | |
273 | #ifdef O_LAZY | |
274 | if (wanted & CEPH_CAP_FILE_LAZYIO) | |
275 | flags |= O_LAZY; | |
276 | #endif | |
277 | ||
278 | req = prepare_open_request(inode->i_sb, flags, 0); | |
279 | if (IS_ERR(req)) { | |
280 | err = PTR_ERR(req); | |
281 | goto out; | |
282 | } | |
283 | ||
284 | req->r_inode = inode; | |
285 | ihold(inode); | |
286 | req->r_num_caps = 1; | |
287 | req->r_fmode = -1; | |
288 | ||
289 | err = ceph_mdsc_do_request(mdsc, NULL, req); | |
290 | ceph_mdsc_put_request(req); | |
291 | out: | |
292 | dout("renew caps %p open result=%d\n", inode, err); | |
293 | return err < 0 ? err : 0; | |
294 | } | |
295 | ||
124e68e7 | 296 | /* |
124e68e7 SW |
297 | * If we already have the requisite capabilities, we can satisfy |
298 | * the open request locally (no need to request new caps from the | |
299 | * MDS). We do, however, need to inform the MDS (asynchronously) | |
300 | * if our wanted caps set expands. | |
301 | */ | |
302 | int ceph_open(struct inode *inode, struct file *file) | |
303 | { | |
304 | struct ceph_inode_info *ci = ceph_inode(inode); | |
3d14c5d2 YS |
305 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
306 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
124e68e7 | 307 | struct ceph_mds_request *req; |
73737682 | 308 | struct ceph_file_info *fi = file->private_data; |
124e68e7 SW |
309 | int err; |
310 | int flags, fmode, wanted; | |
311 | ||
73737682 | 312 | if (fi) { |
124e68e7 SW |
313 | dout("open file %p is already opened\n", file); |
314 | return 0; | |
315 | } | |
316 | ||
317 | /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */ | |
318 | flags = file->f_flags & ~(O_CREAT|O_EXCL); | |
319 | if (S_ISDIR(inode->i_mode)) | |
320 | flags = O_DIRECTORY; /* mds likes to know */ | |
321 | ||
322 | dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode, | |
323 | ceph_vinop(inode), file, flags, file->f_flags); | |
324 | fmode = ceph_flags_to_mode(flags); | |
325 | wanted = ceph_caps_for_mode(fmode); | |
326 | ||
327 | /* snapped files are read-only */ | |
328 | if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE)) | |
329 | return -EROFS; | |
330 | ||
331 | /* trivially open snapdir */ | |
332 | if (ceph_snap(inode) == CEPH_SNAPDIR) { | |
be655596 | 333 | spin_lock(&ci->i_ceph_lock); |
124e68e7 | 334 | __ceph_get_fmode(ci, fmode); |
be655596 | 335 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
336 | return ceph_init_file(inode, file, fmode); |
337 | } | |
338 | ||
339 | /* | |
7421ab80 SW |
340 | * No need to block if we have caps on the auth MDS (for |
341 | * write) or any MDS (for read). Update wanted set | |
124e68e7 SW |
342 | * asynchronously. |
343 | */ | |
be655596 | 344 | spin_lock(&ci->i_ceph_lock); |
7421ab80 SW |
345 | if (__ceph_is_any_real_caps(ci) && |
346 | (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) { | |
c1944fed | 347 | int mds_wanted = __ceph_caps_mds_wanted(ci, true); |
124e68e7 SW |
348 | int issued = __ceph_caps_issued(ci, NULL); |
349 | ||
350 | dout("open %p fmode %d want %s issued %s using existing\n", | |
351 | inode, fmode, ceph_cap_string(wanted), | |
352 | ceph_cap_string(issued)); | |
353 | __ceph_get_fmode(ci, fmode); | |
be655596 | 354 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
355 | |
356 | /* adjust wanted? */ | |
357 | if ((issued & wanted) != wanted && | |
358 | (mds_wanted & wanted) != wanted && | |
359 | ceph_snap(inode) != CEPH_SNAPDIR) | |
360 | ceph_check_caps(ci, 0, NULL); | |
361 | ||
362 | return ceph_init_file(inode, file, fmode); | |
363 | } else if (ceph_snap(inode) != CEPH_NOSNAP && | |
364 | (ci->i_snap_caps & wanted) == wanted) { | |
365 | __ceph_get_fmode(ci, fmode); | |
be655596 | 366 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
367 | return ceph_init_file(inode, file, fmode); |
368 | } | |
99ccbd22 | 369 | |
be655596 | 370 | spin_unlock(&ci->i_ceph_lock); |
124e68e7 SW |
371 | |
372 | dout("open fmode %d wants %s\n", fmode, ceph_cap_string(wanted)); | |
373 | req = prepare_open_request(inode->i_sb, flags, 0); | |
374 | if (IS_ERR(req)) { | |
375 | err = PTR_ERR(req); | |
376 | goto out; | |
377 | } | |
70b666c3 SW |
378 | req->r_inode = inode; |
379 | ihold(inode); | |
99ccbd22 | 380 | |
124e68e7 | 381 | req->r_num_caps = 1; |
e36d571d | 382 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
124e68e7 SW |
383 | if (!err) |
384 | err = ceph_init_file(inode, file, req->r_fmode); | |
385 | ceph_mdsc_put_request(req); | |
386 | dout("open result=%d on %llx.%llx\n", err, ceph_vinop(inode)); | |
387 | out: | |
388 | return err; | |
389 | } | |
390 | ||
391 | ||
392 | /* | |
5ef50c3b SW |
393 | * Do a lookup + open with a single request. If we get a non-existent |
394 | * file or symlink, return 1 so the VFS can retry. | |
124e68e7 | 395 | */ |
5ef50c3b | 396 | int ceph_atomic_open(struct inode *dir, struct dentry *dentry, |
30d90494 | 397 | struct file *file, unsigned flags, umode_t mode, |
d9585277 | 398 | int *opened) |
124e68e7 | 399 | { |
3d14c5d2 YS |
400 | struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb); |
401 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
124e68e7 | 402 | struct ceph_mds_request *req; |
5ef50c3b | 403 | struct dentry *dn; |
b1ee94aa | 404 | struct ceph_acls_info acls = {}; |
b7a29217 | 405 | int mask; |
124e68e7 | 406 | int err; |
124e68e7 | 407 | |
a455589f AV |
408 | dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n", |
409 | dir, dentry, dentry, | |
5ef50c3b SW |
410 | d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode); |
411 | ||
412 | if (dentry->d_name.len > NAME_MAX) | |
413 | return -ENAMETOOLONG; | |
414 | ||
b1ee94aa | 415 | if (flags & O_CREAT) { |
b7a29217 LH |
416 | if (ceph_quota_is_max_files_exceeded(dir)) |
417 | return -EDQUOT; | |
b1ee94aa YZ |
418 | err = ceph_pre_init_acls(dir, &mode, &acls); |
419 | if (err < 0) | |
420 | return err; | |
421 | } | |
422 | ||
124e68e7 SW |
423 | /* do the open */ |
424 | req = prepare_open_request(dir->i_sb, flags, mode); | |
b1ee94aa YZ |
425 | if (IS_ERR(req)) { |
426 | err = PTR_ERR(req); | |
427 | goto out_acl; | |
428 | } | |
124e68e7 SW |
429 | req->r_dentry = dget(dentry); |
430 | req->r_num_caps = 2; | |
431 | if (flags & O_CREAT) { | |
222b7f90 | 432 | req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL; |
124e68e7 | 433 | req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |
b1ee94aa YZ |
434 | if (acls.pagelist) { |
435 | req->r_pagelist = acls.pagelist; | |
436 | acls.pagelist = NULL; | |
437 | } | |
124e68e7 | 438 | } |
315f2408 YZ |
439 | |
440 | mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; | |
441 | if (ceph_security_xattr_wanted(dir)) | |
442 | mask |= CEPH_CAP_XATTR_SHARED; | |
443 | req->r_args.open.mask = cpu_to_le32(mask); | |
444 | ||
3dd69aab JL |
445 | req->r_parent = dir; |
446 | set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); | |
acda7657 SW |
447 | err = ceph_mdsc_do_request(mdsc, |
448 | (flags & (O_CREAT|O_TRUNC)) ? dir : NULL, | |
449 | req); | |
bf91c315 | 450 | err = ceph_handle_snapdir(req, dentry, err); |
79aec984 | 451 | if (err) |
b1ee94aa | 452 | goto out_req; |
79aec984 | 453 | |
a43137f7 | 454 | if ((flags & O_CREAT) && !req->r_reply_info.head->is_dentry) |
124e68e7 | 455 | err = ceph_handle_notrace_create(dir, dentry); |
2d83bde9 | 456 | |
00699ad8 | 457 | if (d_in_lookup(dentry)) { |
5ef50c3b SW |
458 | dn = ceph_finish_lookup(req, dentry, err); |
459 | if (IS_ERR(dn)) | |
460 | err = PTR_ERR(dn); | |
461 | } else { | |
462 | /* we were given a hashed negative dentry */ | |
463 | dn = NULL; | |
464 | } | |
465 | if (err) | |
b1ee94aa | 466 | goto out_req; |
2b0143b5 | 467 | if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) { |
5ef50c3b SW |
468 | /* make vfs retry on splice, ENOENT, or symlink */ |
469 | dout("atomic_open finish_no_open on dn %p\n", dn); | |
470 | err = finish_no_open(file, dn); | |
471 | } else { | |
472 | dout("atomic_open finish_open on dn %p\n", dn); | |
6e8575fa | 473 | if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) { |
2b0143b5 | 474 | ceph_init_inode_acls(d_inode(dentry), &acls); |
6e8575fa SL |
475 | *opened |= FILE_CREATED; |
476 | } | |
5ef50c3b SW |
477 | err = finish_open(file, dentry, ceph_open, opened); |
478 | } | |
b1ee94aa | 479 | out_req: |
ab866549 YZ |
480 | if (!req->r_err && req->r_target_inode) |
481 | ceph_put_fmode(ceph_inode(req->r_target_inode), req->r_fmode); | |
5ef50c3b | 482 | ceph_mdsc_put_request(req); |
b1ee94aa YZ |
483 | out_acl: |
484 | ceph_release_acls_info(&acls); | |
5ef50c3b | 485 | dout("atomic_open result=%d\n", err); |
d9585277 | 486 | return err; |
124e68e7 SW |
487 | } |
488 | ||
489 | int ceph_release(struct inode *inode, struct file *file) | |
490 | { | |
491 | struct ceph_inode_info *ci = ceph_inode(inode); | |
124e68e7 | 492 | |
bb48bd4d CX |
493 | if (S_ISDIR(inode->i_mode)) { |
494 | struct ceph_dir_file_info *dfi = file->private_data; | |
495 | dout("release inode %p dir file %p\n", inode, file); | |
496 | WARN_ON(!list_empty(&dfi->file_info.rw_contexts)); | |
497 | ||
498 | ceph_put_fmode(ci, dfi->file_info.fmode); | |
499 | ||
500 | if (dfi->last_readdir) | |
501 | ceph_mdsc_put_request(dfi->last_readdir); | |
502 | kfree(dfi->last_name); | |
503 | kfree(dfi->dir_info); | |
504 | kmem_cache_free(ceph_dir_file_cachep, dfi); | |
505 | } else { | |
506 | struct ceph_file_info *fi = file->private_data; | |
507 | dout("release inode %p regular file %p\n", inode, file); | |
508 | WARN_ON(!list_empty(&fi->rw_contexts)); | |
509 | ||
510 | ceph_put_fmode(ci, fi->fmode); | |
511 | kmem_cache_free(ceph_file_cachep, fi); | |
512 | } | |
195d3ce2 SW |
513 | |
514 | /* wake up anyone waiting for caps on this inode */ | |
03066f23 | 515 | wake_up_all(&ci->i_cap_wq); |
124e68e7 SW |
516 | return 0; |
517 | } | |
518 | ||
83701246 | 519 | enum { |
c8fe9b17 YZ |
520 | HAVE_RETRIED = 1, |
521 | CHECK_EOF = 2, | |
522 | READ_INLINE = 3, | |
83701246 YZ |
523 | }; |
524 | ||
124e68e7 SW |
525 | /* |
526 | * Read a range of bytes striped over one or more objects. Iterate over | |
527 | * objects we stripe over. (That's not atomic, but good enough for now.) | |
528 | * | |
529 | * If we get a short result from the OSD, check against i_size; we need to | |
530 | * only return a short read to the caller if we hit EOF. | |
531 | */ | |
532 | static int striped_read(struct inode *inode, | |
7ce469a5 | 533 | u64 pos, u64 len, |
6a026589 | 534 | struct page **pages, int num_pages, |
7ce469a5 | 535 | int page_align, int *checkeof) |
124e68e7 | 536 | { |
3d14c5d2 | 537 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
124e68e7 | 538 | struct ceph_inode_info *ci = ceph_inode(inode); |
7ce469a5 | 539 | u64 this_len; |
99c88e69 | 540 | loff_t i_size; |
7ce469a5 YZ |
541 | int page_idx; |
542 | int ret, read = 0; | |
124e68e7 SW |
543 | bool hit_stripe, was_short; |
544 | ||
545 | /* | |
546 | * we may need to do multiple reads. not atomic, unfortunately. | |
547 | */ | |
124e68e7 | 548 | more: |
7ce469a5 YZ |
549 | this_len = len; |
550 | page_idx = (page_align + read) >> PAGE_SHIFT; | |
3d14c5d2 | 551 | ret = ceph_osdc_readpages(&fsc->client->osdc, ceph_vino(inode), |
124e68e7 | 552 | &ci->i_layout, pos, &this_len, |
7ce469a5 YZ |
553 | ci->i_truncate_seq, ci->i_truncate_size, |
554 | pages + page_idx, num_pages - page_idx, | |
555 | ((page_align + read) & ~PAGE_MASK)); | |
124e68e7 SW |
556 | if (ret == -ENOENT) |
557 | ret = 0; | |
7ce469a5 | 558 | hit_stripe = this_len < len; |
0e98728f | 559 | was_short = ret >= 0 && ret < this_len; |
7ce469a5 | 560 | dout("striped_read %llu~%llu (read %u) got %d%s%s\n", pos, len, read, |
124e68e7 SW |
561 | ret, hit_stripe ? " HITSTRIPE" : "", was_short ? " SHORT" : ""); |
562 | ||
99c88e69 | 563 | i_size = i_size_read(inode); |
02ae66d8 | 564 | if (ret >= 0) { |
99c88e69 YZ |
565 | if (was_short && (pos + ret < i_size)) { |
566 | int zlen = min(this_len - ret, i_size - pos - ret); | |
7ce469a5 | 567 | int zoff = page_align + read + ret; |
02ae66d8 | 568 | dout(" zero gap %llu to %llu\n", |
7ce469a5 | 569 | pos + ret, pos + ret + zlen); |
1487a688 YZ |
570 | ceph_zero_page_vector_range(zoff, zlen, pages); |
571 | ret += zlen; | |
124e68e7 | 572 | } |
02ae66d8 | 573 | |
7ce469a5 | 574 | read += ret; |
124e68e7 | 575 | pos += ret; |
7ce469a5 | 576 | len -= ret; |
124e68e7 | 577 | |
02ae66d8 | 578 | /* hit stripe and need continue*/ |
7ce469a5 | 579 | if (len && hit_stripe && pos < i_size) |
124e68e7 SW |
580 | goto more; |
581 | } | |
582 | ||
ee7289bf | 583 | if (read > 0) { |
02ae66d8 | 584 | ret = read; |
c3cd6283 | 585 | /* did we bounce off eof? */ |
7ce469a5 | 586 | if (pos + len > i_size) |
83701246 | 587 | *checkeof = CHECK_EOF; |
124e68e7 SW |
588 | } |
589 | ||
124e68e7 SW |
590 | dout("striped_read returns %d\n", ret); |
591 | return ret; | |
592 | } | |
593 | ||
594 | /* | |
595 | * Completely synchronous read and write methods. Direct from __user | |
596 | * buffer to osd, or directly to user pages (if O_DIRECT). | |
597 | * | |
598 | * If the read spans object boundary, just do multiple reads. | |
599 | */ | |
7ce469a5 YZ |
600 | static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to, |
601 | int *checkeof) | |
124e68e7 | 602 | { |
8eb4efb0 | 603 | struct file *file = iocb->ki_filp; |
496ad9aa | 604 | struct inode *inode = file_inode(file); |
124e68e7 | 605 | struct page **pages; |
8eb4efb0 | 606 | u64 off = iocb->ki_pos; |
7ce469a5 YZ |
607 | int num_pages; |
608 | ssize_t ret; | |
609 | size_t len = iov_iter_count(to); | |
124e68e7 | 610 | |
1c0a9c2d | 611 | dout("sync_read on file %p %llu~%u %s\n", file, off, (unsigned)len, |
124e68e7 | 612 | (file->f_flags & O_DIRECT) ? "O_DIRECT" : ""); |
d0d0db22 YZ |
613 | |
614 | if (!len) | |
615 | return 0; | |
e98b6fed SW |
616 | /* |
617 | * flush any page cache pages in this range. this | |
618 | * will make concurrent normal and sync io slow, | |
619 | * but it will at least behave sensibly when they are | |
620 | * in sequence. | |
621 | */ | |
8eb4efb0 | 622 | ret = filemap_write_and_wait_range(inode->i_mapping, off, |
623 | off + len); | |
29065a51 | 624 | if (ret < 0) |
8eb4efb0 | 625 | return ret; |
29065a51 | 626 | |
7ce469a5 YZ |
627 | if (unlikely(to->type & ITER_PIPE)) { |
628 | size_t page_off; | |
629 | ret = iov_iter_get_pages_alloc(to, &pages, len, | |
630 | &page_off); | |
631 | if (ret <= 0) | |
632 | return -ENOMEM; | |
633 | num_pages = DIV_ROUND_UP(ret + page_off, PAGE_SIZE); | |
634 | ||
635 | ret = striped_read(inode, off, ret, pages, num_pages, | |
636 | page_off, checkeof); | |
637 | if (ret > 0) { | |
638 | iov_iter_advance(to, ret); | |
639 | off += ret; | |
640 | } else { | |
641 | iov_iter_advance(to, 0); | |
642 | } | |
643 | ceph_put_page_vector(pages, num_pages, false); | |
644 | } else { | |
645 | num_pages = calc_pages_for(off, len); | |
646 | pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); | |
647 | if (IS_ERR(pages)) | |
648 | return PTR_ERR(pages); | |
649 | ||
650 | ret = striped_read(inode, off, len, pages, num_pages, | |
651 | (off & ~PAGE_MASK), checkeof); | |
652 | if (ret > 0) { | |
653 | int l, k = 0; | |
654 | size_t left = ret; | |
655 | ||
656 | while (left) { | |
657 | size_t page_off = off & ~PAGE_MASK; | |
658 | size_t copy = min_t(size_t, left, | |
659 | PAGE_SIZE - page_off); | |
660 | l = copy_page_to_iter(pages[k++], page_off, | |
661 | copy, to); | |
662 | off += l; | |
663 | left -= l; | |
664 | if (l < copy) | |
665 | break; | |
666 | } | |
8eb4efb0 | 667 | } |
7ce469a5 | 668 | ceph_release_page_vector(pages, num_pages); |
8eb4efb0 | 669 | } |
124e68e7 | 670 | |
8eb4efb0 | 671 | if (off > iocb->ki_pos) { |
672 | ret = off - iocb->ki_pos; | |
673 | iocb->ki_pos = off; | |
674 | } | |
124e68e7 | 675 | |
7ce469a5 | 676 | dout("sync_read result %zd\n", ret); |
124e68e7 SW |
677 | return ret; |
678 | } | |
679 | ||
c8fe9b17 YZ |
680 | struct ceph_aio_request { |
681 | struct kiocb *iocb; | |
682 | size_t total_len; | |
85784f93 YZ |
683 | bool write; |
684 | bool should_dirty; | |
c8fe9b17 YZ |
685 | int error; |
686 | struct list_head osd_reqs; | |
687 | unsigned num_reqs; | |
688 | atomic_t pending_reqs; | |
5be0389d | 689 | struct timespec mtime; |
c8fe9b17 YZ |
690 | struct ceph_cap_flush *prealloc_cf; |
691 | }; | |
692 | ||
5be0389d YZ |
693 | struct ceph_aio_work { |
694 | struct work_struct work; | |
695 | struct ceph_osd_request *req; | |
696 | }; | |
697 | ||
698 | static void ceph_aio_retry_work(struct work_struct *work); | |
699 | ||
c8fe9b17 YZ |
700 | static void ceph_aio_complete(struct inode *inode, |
701 | struct ceph_aio_request *aio_req) | |
702 | { | |
703 | struct ceph_inode_info *ci = ceph_inode(inode); | |
704 | int ret; | |
705 | ||
706 | if (!atomic_dec_and_test(&aio_req->pending_reqs)) | |
707 | return; | |
708 | ||
709 | ret = aio_req->error; | |
710 | if (!ret) | |
711 | ret = aio_req->total_len; | |
712 | ||
713 | dout("ceph_aio_complete %p rc %d\n", inode, ret); | |
714 | ||
715 | if (ret >= 0 && aio_req->write) { | |
716 | int dirty; | |
717 | ||
718 | loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len; | |
719 | if (endoff > i_size_read(inode)) { | |
720 | if (ceph_inode_set_size(inode, endoff)) | |
721 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); | |
722 | } | |
723 | ||
724 | spin_lock(&ci->i_ceph_lock); | |
725 | ci->i_inline_version = CEPH_INLINE_NONE; | |
726 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, | |
727 | &aio_req->prealloc_cf); | |
728 | spin_unlock(&ci->i_ceph_lock); | |
729 | if (dirty) | |
730 | __mark_inode_dirty(inode, dirty); | |
731 | ||
732 | } | |
733 | ||
734 | ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR : | |
735 | CEPH_CAP_FILE_RD)); | |
736 | ||
737 | aio_req->iocb->ki_complete(aio_req->iocb, ret, 0); | |
738 | ||
739 | ceph_free_cap_flush(aio_req->prealloc_cf); | |
740 | kfree(aio_req); | |
741 | } | |
742 | ||
85e084fe | 743 | static void ceph_aio_complete_req(struct ceph_osd_request *req) |
c8fe9b17 YZ |
744 | { |
745 | int rc = req->r_result; | |
746 | struct inode *inode = req->r_inode; | |
747 | struct ceph_aio_request *aio_req = req->r_priv; | |
748 | struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0); | |
749 | int num_pages = calc_pages_for((u64)osd_data->alignment, | |
750 | osd_data->length); | |
751 | ||
752 | dout("ceph_aio_complete_req %p rc %d bytes %llu\n", | |
753 | inode, rc, osd_data->length); | |
754 | ||
755 | if (rc == -EOLDSNAPC) { | |
5be0389d YZ |
756 | struct ceph_aio_work *aio_work; |
757 | BUG_ON(!aio_req->write); | |
758 | ||
759 | aio_work = kmalloc(sizeof(*aio_work), GFP_NOFS); | |
760 | if (aio_work) { | |
761 | INIT_WORK(&aio_work->work, ceph_aio_retry_work); | |
762 | aio_work->req = req; | |
763 | queue_work(ceph_inode_to_client(inode)->wb_wq, | |
764 | &aio_work->work); | |
765 | return; | |
766 | } | |
767 | rc = -ENOMEM; | |
768 | } else if (!aio_req->write) { | |
c8fe9b17 YZ |
769 | if (rc == -ENOENT) |
770 | rc = 0; | |
771 | if (rc >= 0 && osd_data->length > rc) { | |
772 | int zoff = osd_data->alignment + rc; | |
773 | int zlen = osd_data->length - rc; | |
774 | /* | |
775 | * If read is satisfied by single OSD request, | |
776 | * it can pass EOF. Otherwise read is within | |
777 | * i_size. | |
778 | */ | |
779 | if (aio_req->num_reqs == 1) { | |
780 | loff_t i_size = i_size_read(inode); | |
781 | loff_t endoff = aio_req->iocb->ki_pos + rc; | |
782 | if (endoff < i_size) | |
783 | zlen = min_t(size_t, zlen, | |
784 | i_size - endoff); | |
785 | aio_req->total_len = rc + zlen; | |
786 | } | |
787 | ||
788 | if (zlen > 0) | |
789 | ceph_zero_page_vector_range(zoff, zlen, | |
790 | osd_data->pages); | |
791 | } | |
792 | } | |
793 | ||
85784f93 | 794 | ceph_put_page_vector(osd_data->pages, num_pages, aio_req->should_dirty); |
c8fe9b17 YZ |
795 | ceph_osdc_put_request(req); |
796 | ||
797 | if (rc < 0) | |
798 | cmpxchg(&aio_req->error, 0, rc); | |
799 | ||
800 | ceph_aio_complete(inode, aio_req); | |
801 | return; | |
802 | } | |
803 | ||
5be0389d YZ |
804 | static void ceph_aio_retry_work(struct work_struct *work) |
805 | { | |
806 | struct ceph_aio_work *aio_work = | |
807 | container_of(work, struct ceph_aio_work, work); | |
808 | struct ceph_osd_request *orig_req = aio_work->req; | |
809 | struct ceph_aio_request *aio_req = orig_req->r_priv; | |
810 | struct inode *inode = orig_req->r_inode; | |
811 | struct ceph_inode_info *ci = ceph_inode(inode); | |
812 | struct ceph_snap_context *snapc; | |
813 | struct ceph_osd_request *req; | |
814 | int ret; | |
815 | ||
816 | spin_lock(&ci->i_ceph_lock); | |
817 | if (__ceph_have_pending_cap_snap(ci)) { | |
818 | struct ceph_cap_snap *capsnap = | |
819 | list_last_entry(&ci->i_cap_snaps, | |
820 | struct ceph_cap_snap, | |
821 | ci_item); | |
822 | snapc = ceph_get_snap_context(capsnap->context); | |
823 | } else { | |
824 | BUG_ON(!ci->i_head_snapc); | |
825 | snapc = ceph_get_snap_context(ci->i_head_snapc); | |
826 | } | |
827 | spin_unlock(&ci->i_ceph_lock); | |
828 | ||
829 | req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 2, | |
830 | false, GFP_NOFS); | |
1418bf07 DC |
831 | if (!req) { |
832 | ret = -ENOMEM; | |
5be0389d YZ |
833 | req = orig_req; |
834 | goto out; | |
835 | } | |
836 | ||
b178cf43 | 837 | req->r_flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
63244fa1 | 838 | ceph_oloc_copy(&req->r_base_oloc, &orig_req->r_base_oloc); |
d30291b9 | 839 | ceph_oid_copy(&req->r_base_oid, &orig_req->r_base_oid); |
5be0389d | 840 | |
13d1ad16 ID |
841 | ret = ceph_osdc_alloc_messages(req, GFP_NOFS); |
842 | if (ret) { | |
843 | ceph_osdc_put_request(req); | |
844 | req = orig_req; | |
845 | goto out; | |
846 | } | |
5be0389d YZ |
847 | |
848 | req->r_ops[0] = orig_req->r_ops[0]; | |
5be0389d | 849 | |
bb873b53 ID |
850 | req->r_mtime = aio_req->mtime; |
851 | req->r_data_offset = req->r_ops[0].extent.offset; | |
5be0389d | 852 | |
5be0389d YZ |
853 | ceph_osdc_put_request(orig_req); |
854 | ||
855 | req->r_callback = ceph_aio_complete_req; | |
856 | req->r_inode = inode; | |
857 | req->r_priv = aio_req; | |
a1f4020a | 858 | req->r_abort_on_full = true; |
5be0389d YZ |
859 | |
860 | ret = ceph_osdc_start_request(req->r_osdc, req, false); | |
861 | out: | |
862 | if (ret < 0) { | |
5be0389d | 863 | req->r_result = ret; |
85e084fe | 864 | ceph_aio_complete_req(req); |
5be0389d YZ |
865 | } |
866 | ||
db6aed70 | 867 | ceph_put_snap_context(snapc); |
5be0389d YZ |
868 | kfree(aio_work); |
869 | } | |
870 | ||
e8344e66 | 871 | static ssize_t |
c8fe9b17 YZ |
872 | ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter, |
873 | struct ceph_snap_context *snapc, | |
874 | struct ceph_cap_flush **pcf) | |
124e68e7 | 875 | { |
e8344e66 | 876 | struct file *file = iocb->ki_filp; |
496ad9aa | 877 | struct inode *inode = file_inode(file); |
124e68e7 | 878 | struct ceph_inode_info *ci = ceph_inode(inode); |
3d14c5d2 | 879 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); |
acead002 | 880 | struct ceph_vino vino; |
124e68e7 SW |
881 | struct ceph_osd_request *req; |
882 | struct page **pages; | |
c8fe9b17 YZ |
883 | struct ceph_aio_request *aio_req = NULL; |
884 | int num_pages = 0; | |
124e68e7 | 885 | int flags; |
124e68e7 | 886 | int ret; |
c2050a45 | 887 | struct timespec mtime = current_time(inode); |
c8fe9b17 YZ |
888 | size_t count = iov_iter_count(iter); |
889 | loff_t pos = iocb->ki_pos; | |
890 | bool write = iov_iter_rw(iter) == WRITE; | |
85784f93 | 891 | bool should_dirty = !write && iter_is_iovec(iter); |
124e68e7 | 892 | |
c8fe9b17 | 893 | if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP) |
124e68e7 SW |
894 | return -EROFS; |
895 | ||
1c0a9c2d YZ |
896 | dout("sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n", |
897 | (write ? "write" : "read"), file, pos, (unsigned)count, | |
898 | snapc, snapc->seq); | |
124e68e7 | 899 | |
e8344e66 | 900 | ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + count); |
29065a51 YS |
901 | if (ret < 0) |
902 | return ret; | |
903 | ||
c8fe9b17 | 904 | if (write) { |
5d7eb1a3 | 905 | int ret2 = invalidate_inode_pages2_range(inode->i_mapping, |
09cbfeaf KS |
906 | pos >> PAGE_SHIFT, |
907 | (pos + count) >> PAGE_SHIFT); | |
5d7eb1a3 | 908 | if (ret2 < 0) |
a380a031 | 909 | dout("invalidate_inode_pages2_range returned %d\n", ret2); |
29065a51 | 910 | |
b178cf43 | 911 | flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
c8fe9b17 YZ |
912 | } else { |
913 | flags = CEPH_OSD_FLAG_READ; | |
914 | } | |
124e68e7 | 915 | |
c8fe9b17 YZ |
916 | while (iov_iter_count(iter) > 0) { |
917 | u64 size = dio_get_pagev_size(iter); | |
918 | size_t start = 0; | |
919 | ssize_t len; | |
e8344e66 | 920 | |
e8344e66 | 921 | vino = ceph_vino(inode); |
922 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
c8fe9b17 | 923 | vino, pos, &size, 0, |
3fb99d48 | 924 | 1, |
c8fe9b17 YZ |
925 | write ? CEPH_OSD_OP_WRITE : |
926 | CEPH_OSD_OP_READ, | |
927 | flags, snapc, | |
e8344e66 | 928 | ci->i_truncate_seq, |
929 | ci->i_truncate_size, | |
930 | false); | |
931 | if (IS_ERR(req)) { | |
932 | ret = PTR_ERR(req); | |
eab87235 | 933 | break; |
e8344e66 | 934 | } |
124e68e7 | 935 | |
95cca2b4 YZ |
936 | if (write) |
937 | size = min_t(u64, size, fsc->mount_options->wsize); | |
938 | else | |
aa187926 YZ |
939 | size = min_t(u64, size, fsc->mount_options->rsize); |
940 | ||
c8fe9b17 YZ |
941 | len = size; |
942 | pages = dio_get_pages_alloc(iter, len, &start, &num_pages); | |
b5b98989 | 943 | if (IS_ERR(pages)) { |
64c31311 | 944 | ceph_osdc_put_request(req); |
b5b98989 | 945 | ret = PTR_ERR(pages); |
64c31311 | 946 | break; |
124e68e7 SW |
947 | } |
948 | ||
949 | /* | |
c8fe9b17 YZ |
950 | * To simplify error handling, allow AIO when IO within i_size |
951 | * or IO can be satisfied by single OSD request. | |
124e68e7 | 952 | */ |
c8fe9b17 YZ |
953 | if (pos == iocb->ki_pos && !is_sync_kiocb(iocb) && |
954 | (len == count || pos + count <= i_size_read(inode))) { | |
955 | aio_req = kzalloc(sizeof(*aio_req), GFP_KERNEL); | |
956 | if (aio_req) { | |
957 | aio_req->iocb = iocb; | |
958 | aio_req->write = write; | |
85784f93 | 959 | aio_req->should_dirty = should_dirty; |
c8fe9b17 YZ |
960 | INIT_LIST_HEAD(&aio_req->osd_reqs); |
961 | if (write) { | |
5be0389d | 962 | aio_req->mtime = mtime; |
c8fe9b17 YZ |
963 | swap(aio_req->prealloc_cf, *pcf); |
964 | } | |
965 | } | |
966 | /* ignore error */ | |
967 | } | |
968 | ||
969 | if (write) { | |
970 | /* | |
971 | * throw out any page cache pages in this range. this | |
972 | * may block. | |
973 | */ | |
974 | truncate_inode_pages_range(inode->i_mapping, pos, | |
09cbfeaf | 975 | (pos+len) | (PAGE_SIZE - 1)); |
c8fe9b17 | 976 | |
bb873b53 | 977 | req->r_mtime = mtime; |
c8fe9b17 YZ |
978 | } |
979 | ||
c8fe9b17 YZ |
980 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, start, |
981 | false, false); | |
e8344e66 | 982 | |
c8fe9b17 YZ |
983 | if (aio_req) { |
984 | aio_req->total_len += len; | |
985 | aio_req->num_reqs++; | |
986 | atomic_inc(&aio_req->pending_reqs); | |
987 | ||
988 | req->r_callback = ceph_aio_complete_req; | |
989 | req->r_inode = inode; | |
990 | req->r_priv = aio_req; | |
991 | list_add_tail(&req->r_unsafe_item, &aio_req->osd_reqs); | |
992 | ||
993 | pos += len; | |
994 | iov_iter_advance(iter, len); | |
995 | continue; | |
996 | } | |
997 | ||
998 | ret = ceph_osdc_start_request(req->r_osdc, req, false); | |
e8344e66 | 999 | if (!ret) |
1000 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
1001 | ||
c8fe9b17 YZ |
1002 | size = i_size_read(inode); |
1003 | if (!write) { | |
1004 | if (ret == -ENOENT) | |
1005 | ret = 0; | |
1006 | if (ret >= 0 && ret < len && pos + ret < size) { | |
1007 | int zlen = min_t(size_t, len - ret, | |
1008 | size - pos - ret); | |
1009 | ceph_zero_page_vector_range(start + ret, zlen, | |
1010 | pages); | |
1011 | ret += zlen; | |
1012 | } | |
1013 | if (ret >= 0) | |
1014 | len = ret; | |
1015 | } | |
1016 | ||
85784f93 | 1017 | ceph_put_page_vector(pages, num_pages, should_dirty); |
e8344e66 | 1018 | |
e8344e66 | 1019 | ceph_osdc_put_request(req); |
c8fe9b17 | 1020 | if (ret < 0) |
e8344e66 | 1021 | break; |
64c31311 | 1022 | |
c8fe9b17 YZ |
1023 | pos += len; |
1024 | iov_iter_advance(iter, len); | |
1025 | ||
1026 | if (!write && pos >= size) | |
e8344e66 | 1027 | break; |
64c31311 | 1028 | |
c8fe9b17 YZ |
1029 | if (write && pos > size) { |
1030 | if (ceph_inode_set_size(inode, pos)) | |
64c31311 AV |
1031 | ceph_check_caps(ceph_inode(inode), |
1032 | CHECK_CAPS_AUTHONLY, | |
1033 | NULL); | |
1034 | } | |
e8344e66 | 1035 | } |
1036 | ||
c8fe9b17 | 1037 | if (aio_req) { |
fc8c3892 YZ |
1038 | LIST_HEAD(osd_reqs); |
1039 | ||
c8fe9b17 YZ |
1040 | if (aio_req->num_reqs == 0) { |
1041 | kfree(aio_req); | |
1042 | return ret; | |
1043 | } | |
1044 | ||
1045 | ceph_get_cap_refs(ci, write ? CEPH_CAP_FILE_WR : | |
1046 | CEPH_CAP_FILE_RD); | |
1047 | ||
fc8c3892 YZ |
1048 | list_splice(&aio_req->osd_reqs, &osd_reqs); |
1049 | while (!list_empty(&osd_reqs)) { | |
1050 | req = list_first_entry(&osd_reqs, | |
c8fe9b17 YZ |
1051 | struct ceph_osd_request, |
1052 | r_unsafe_item); | |
1053 | list_del_init(&req->r_unsafe_item); | |
1054 | if (ret >= 0) | |
1055 | ret = ceph_osdc_start_request(req->r_osdc, | |
1056 | req, false); | |
1057 | if (ret < 0) { | |
1058 | req->r_result = ret; | |
85e084fe | 1059 | ceph_aio_complete_req(req); |
c8fe9b17 YZ |
1060 | } |
1061 | } | |
1062 | return -EIOCBQUEUED; | |
1063 | } | |
1064 | ||
1065 | if (ret != -EOLDSNAPC && pos > iocb->ki_pos) { | |
1066 | ret = pos - iocb->ki_pos; | |
e8344e66 | 1067 | iocb->ki_pos = pos; |
e8344e66 | 1068 | } |
1069 | return ret; | |
1070 | } | |
1071 | ||
e8344e66 | 1072 | /* |
1073 | * Synchronous write, straight from __user pointer or user pages. | |
1074 | * | |
1075 | * If write spans object boundary, just do multiple writes. (For a | |
1076 | * correct atomic write, we should e.g. take write locks on all | |
1077 | * objects, rollback on failure, etc.) | |
1078 | */ | |
06fee30f | 1079 | static ssize_t |
5dda377c YZ |
1080 | ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos, |
1081 | struct ceph_snap_context *snapc) | |
e8344e66 | 1082 | { |
1083 | struct file *file = iocb->ki_filp; | |
1084 | struct inode *inode = file_inode(file); | |
1085 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1086 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
e8344e66 | 1087 | struct ceph_vino vino; |
1088 | struct ceph_osd_request *req; | |
1089 | struct page **pages; | |
1090 | u64 len; | |
1091 | int num_pages; | |
1092 | int written = 0; | |
1093 | int flags; | |
e8344e66 | 1094 | int ret; |
efb0ca76 | 1095 | bool check_caps = false; |
c2050a45 | 1096 | struct timespec mtime = current_time(inode); |
4908b822 | 1097 | size_t count = iov_iter_count(from); |
e8344e66 | 1098 | |
1099 | if (ceph_snap(file_inode(file)) != CEPH_NOSNAP) | |
1100 | return -EROFS; | |
1101 | ||
1c0a9c2d YZ |
1102 | dout("sync_write on file %p %lld~%u snapc %p seq %lld\n", |
1103 | file, pos, (unsigned)count, snapc, snapc->seq); | |
e8344e66 | 1104 | |
1105 | ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + count); | |
1106 | if (ret < 0) | |
1107 | return ret; | |
1108 | ||
1109 | ret = invalidate_inode_pages2_range(inode->i_mapping, | |
09cbfeaf KS |
1110 | pos >> PAGE_SHIFT, |
1111 | (pos + count) >> PAGE_SHIFT); | |
e8344e66 | 1112 | if (ret < 0) |
1113 | dout("invalidate_inode_pages2_range returned %d\n", ret); | |
1114 | ||
b178cf43 | 1115 | flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; |
e8344e66 | 1116 | |
4908b822 | 1117 | while ((len = iov_iter_count(from)) > 0) { |
e8344e66 | 1118 | size_t left; |
1119 | int n; | |
1120 | ||
e8344e66 | 1121 | vino = ceph_vino(inode); |
1122 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
715e4cd4 | 1123 | vino, pos, &len, 0, 1, |
e8344e66 | 1124 | CEPH_OSD_OP_WRITE, flags, snapc, |
1125 | ci->i_truncate_seq, | |
1126 | ci->i_truncate_size, | |
1127 | false); | |
1128 | if (IS_ERR(req)) { | |
1129 | ret = PTR_ERR(req); | |
eab87235 | 1130 | break; |
e8344e66 | 1131 | } |
1132 | ||
1133 | /* | |
1134 | * write from beginning of first page, | |
1135 | * regardless of io alignment | |
1136 | */ | |
09cbfeaf | 1137 | num_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT; |
e8344e66 | 1138 | |
687265e5 | 1139 | pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); |
124e68e7 SW |
1140 | if (IS_ERR(pages)) { |
1141 | ret = PTR_ERR(pages); | |
1142 | goto out; | |
1143 | } | |
e8344e66 | 1144 | |
1145 | left = len; | |
1146 | for (n = 0; n < num_pages; n++) { | |
125d725c | 1147 | size_t plen = min_t(size_t, left, PAGE_SIZE); |
4908b822 | 1148 | ret = copy_page_from_iter(pages[n], 0, plen, from); |
e8344e66 | 1149 | if (ret != plen) { |
1150 | ret = -EFAULT; | |
1151 | break; | |
1152 | } | |
1153 | left -= ret; | |
e8344e66 | 1154 | } |
1155 | ||
124e68e7 SW |
1156 | if (ret < 0) { |
1157 | ceph_release_page_vector(pages, num_pages); | |
1158 | goto out; | |
1159 | } | |
1160 | ||
e8344e66 | 1161 | req->r_inode = inode; |
124e68e7 | 1162 | |
e8344e66 | 1163 | osd_req_op_extent_osd_data_pages(req, 0, pages, len, 0, |
1164 | false, true); | |
02ee07d3 | 1165 | |
bb873b53 | 1166 | req->r_mtime = mtime; |
e8344e66 | 1167 | ret = ceph_osdc_start_request(&fsc->client->osdc, req, false); |
1168 | if (!ret) | |
1169 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
124e68e7 SW |
1170 | |
1171 | out: | |
e8344e66 | 1172 | ceph_osdc_put_request(req); |
26544c62 JL |
1173 | if (ret != 0) { |
1174 | ceph_set_error_write(ci); | |
e8344e66 | 1175 | break; |
26544c62 JL |
1176 | } |
1177 | ||
1178 | ceph_clear_error_write(ci); | |
1179 | pos += len; | |
1180 | written += len; | |
1181 | if (pos > i_size_read(inode)) { | |
1182 | check_caps = ceph_inode_set_size(inode, pos); | |
1183 | if (check_caps) | |
1184 | ceph_check_caps(ceph_inode(inode), | |
1185 | CHECK_CAPS_AUTHONLY, | |
1186 | NULL); | |
1187 | } | |
1188 | ||
e8344e66 | 1189 | } |
124e68e7 | 1190 | |
e8344e66 | 1191 | if (ret != -EOLDSNAPC && written > 0) { |
124e68e7 | 1192 | ret = written; |
e8344e66 | 1193 | iocb->ki_pos = pos; |
124e68e7 SW |
1194 | } |
1195 | return ret; | |
1196 | } | |
1197 | ||
1198 | /* | |
1199 | * Wrap generic_file_aio_read with checks for cap bits on the inode. | |
1200 | * Atomically grab references, so that those bits are not released | |
1201 | * back to the MDS mid-read. | |
1202 | * | |
1203 | * Hmm, the sync read case isn't actually async... should it be? | |
1204 | */ | |
3644424d | 1205 | static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to) |
124e68e7 SW |
1206 | { |
1207 | struct file *filp = iocb->ki_filp; | |
2962507c | 1208 | struct ceph_file_info *fi = filp->private_data; |
66ee59af | 1209 | size_t len = iov_iter_count(to); |
496ad9aa | 1210 | struct inode *inode = file_inode(filp); |
124e68e7 | 1211 | struct ceph_inode_info *ci = ceph_inode(inode); |
3738daa6 | 1212 | struct page *pinned_page = NULL; |
124e68e7 | 1213 | ssize_t ret; |
2962507c | 1214 | int want, got = 0; |
83701246 | 1215 | int retry_op = 0, read = 0; |
124e68e7 | 1216 | |
6a026589 | 1217 | again: |
8eb4efb0 | 1218 | dout("aio_read %p %llx.%llx %llu~%u trying to get caps on %p\n", |
1219 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, inode); | |
1220 | ||
2962507c SW |
1221 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
1222 | want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; | |
1223 | else | |
1224 | want = CEPH_CAP_FILE_CACHE; | |
3738daa6 | 1225 | ret = ceph_get_caps(ci, CEPH_CAP_FILE_RD, want, -1, &got, &pinned_page); |
124e68e7 | 1226 | if (ret < 0) |
8eb4efb0 | 1227 | return ret; |
124e68e7 | 1228 | |
2962507c | 1229 | if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 || |
2ba48ce5 | 1230 | (iocb->ki_flags & IOCB_DIRECT) || |
8eb4efb0 | 1231 | (fi->flags & CEPH_F_SYNC)) { |
8eb4efb0 | 1232 | |
1233 | dout("aio_sync_read %p %llx.%llx %llu~%u got cap refs on %s\n", | |
1234 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, | |
1235 | ceph_cap_string(got)); | |
1236 | ||
83701246 | 1237 | if (ci->i_inline_version == CEPH_INLINE_NONE) { |
c8fe9b17 YZ |
1238 | if (!retry_op && (iocb->ki_flags & IOCB_DIRECT)) { |
1239 | ret = ceph_direct_read_write(iocb, to, | |
1240 | NULL, NULL); | |
1241 | if (ret >= 0 && ret < len) | |
1242 | retry_op = CHECK_EOF; | |
1243 | } else { | |
1244 | ret = ceph_sync_read(iocb, to, &retry_op); | |
1245 | } | |
83701246 YZ |
1246 | } else { |
1247 | retry_op = READ_INLINE; | |
1248 | } | |
8eb4efb0 | 1249 | } else { |
5d988308 | 1250 | CEPH_DEFINE_RW_CONTEXT(rw_ctx, got); |
8eb4efb0 | 1251 | dout("aio_read %p %llx.%llx %llu~%u got cap refs on %s\n", |
3644424d | 1252 | inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, |
8eb4efb0 | 1253 | ceph_cap_string(got)); |
5d988308 | 1254 | ceph_add_rw_context(fi, &rw_ctx); |
3644424d | 1255 | ret = generic_file_read_iter(iocb, to); |
5d988308 | 1256 | ceph_del_rw_context(fi, &rw_ctx); |
8eb4efb0 | 1257 | } |
124e68e7 SW |
1258 | dout("aio_read %p %llx.%llx dropping cap refs on %s = %d\n", |
1259 | inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret); | |
3738daa6 | 1260 | if (pinned_page) { |
09cbfeaf | 1261 | put_page(pinned_page); |
3738daa6 YZ |
1262 | pinned_page = NULL; |
1263 | } | |
124e68e7 | 1264 | ceph_put_cap_refs(ci, got); |
c8fe9b17 | 1265 | if (retry_op > HAVE_RETRIED && ret >= 0) { |
83701246 YZ |
1266 | int statret; |
1267 | struct page *page = NULL; | |
1268 | loff_t i_size; | |
1269 | if (retry_op == READ_INLINE) { | |
687265e5 | 1270 | page = __page_cache_alloc(GFP_KERNEL); |
83701246 YZ |
1271 | if (!page) |
1272 | return -ENOMEM; | |
1273 | } | |
6a026589 | 1274 | |
83701246 YZ |
1275 | statret = __ceph_do_getattr(inode, page, |
1276 | CEPH_STAT_CAP_INLINE_DATA, !!page); | |
1277 | if (statret < 0) { | |
0d7718f6 NB |
1278 | if (page) |
1279 | __free_page(page); | |
83701246 YZ |
1280 | if (statret == -ENODATA) { |
1281 | BUG_ON(retry_op != READ_INLINE); | |
1282 | goto again; | |
1283 | } | |
1284 | return statret; | |
1285 | } | |
6a026589 | 1286 | |
83701246 YZ |
1287 | i_size = i_size_read(inode); |
1288 | if (retry_op == READ_INLINE) { | |
fcc02d2a YZ |
1289 | BUG_ON(ret > 0 || read > 0); |
1290 | if (iocb->ki_pos < i_size && | |
09cbfeaf | 1291 | iocb->ki_pos < PAGE_SIZE) { |
83701246 YZ |
1292 | loff_t end = min_t(loff_t, i_size, |
1293 | iocb->ki_pos + len); | |
09cbfeaf | 1294 | end = min_t(loff_t, end, PAGE_SIZE); |
83701246 YZ |
1295 | if (statret < end) |
1296 | zero_user_segment(page, statret, end); | |
1297 | ret = copy_page_to_iter(page, | |
1298 | iocb->ki_pos & ~PAGE_MASK, | |
1299 | end - iocb->ki_pos, to); | |
1300 | iocb->ki_pos += ret; | |
fcc02d2a YZ |
1301 | read += ret; |
1302 | } | |
1303 | if (iocb->ki_pos < i_size && read < len) { | |
1304 | size_t zlen = min_t(size_t, len - read, | |
1305 | i_size - iocb->ki_pos); | |
1306 | ret = iov_iter_zero(zlen, to); | |
1307 | iocb->ki_pos += ret; | |
1308 | read += ret; | |
83701246 YZ |
1309 | } |
1310 | __free_pages(page, 0); | |
fcc02d2a | 1311 | return read; |
83701246 | 1312 | } |
6a026589 SW |
1313 | |
1314 | /* hit EOF or hole? */ | |
83701246 | 1315 | if (retry_op == CHECK_EOF && iocb->ki_pos < i_size && |
fcc02d2a | 1316 | ret < len) { |
8eb4efb0 | 1317 | dout("sync_read hit hole, ppos %lld < size %lld" |
99c88e69 | 1318 | ", reading more\n", iocb->ki_pos, i_size); |
8eb4efb0 | 1319 | |
6a026589 | 1320 | read += ret; |
6a026589 | 1321 | len -= ret; |
c8fe9b17 | 1322 | retry_op = HAVE_RETRIED; |
6a026589 SW |
1323 | goto again; |
1324 | } | |
1325 | } | |
8eb4efb0 | 1326 | |
6a026589 SW |
1327 | if (ret >= 0) |
1328 | ret += read; | |
1329 | ||
124e68e7 SW |
1330 | return ret; |
1331 | } | |
1332 | ||
1333 | /* | |
1334 | * Take cap references to avoid releasing caps to MDS mid-write. | |
1335 | * | |
1336 | * If we are synchronous, and write with an old snap context, the OSD | |
1337 | * may return EOLDSNAPC. In that case, retry the write.. _after_ | |
1338 | * dropping our cap refs and allowing the pending snap to logically | |
1339 | * complete _before_ this write occurs. | |
1340 | * | |
1341 | * If we are near ENOSPC, write synchronously. | |
1342 | */ | |
4908b822 | 1343 | static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) |
124e68e7 SW |
1344 | { |
1345 | struct file *file = iocb->ki_filp; | |
33caad32 | 1346 | struct ceph_file_info *fi = file->private_data; |
496ad9aa | 1347 | struct inode *inode = file_inode(file); |
124e68e7 | 1348 | struct ceph_inode_info *ci = ceph_inode(inode); |
3d14c5d2 YS |
1349 | struct ceph_osd_client *osdc = |
1350 | &ceph_sb_to_client(inode->i_sb)->client->osdc; | |
f66fd9f0 | 1351 | struct ceph_cap_flush *prealloc_cf; |
3309dd04 | 1352 | ssize_t count, written = 0; |
03d254ed | 1353 | int err, want, got; |
3309dd04 | 1354 | loff_t pos; |
124e68e7 SW |
1355 | |
1356 | if (ceph_snap(inode) != CEPH_NOSNAP) | |
1357 | return -EROFS; | |
1358 | ||
f66fd9f0 YZ |
1359 | prealloc_cf = ceph_alloc_cap_flush(); |
1360 | if (!prealloc_cf) | |
1361 | return -ENOMEM; | |
1362 | ||
a5cd74ad | 1363 | retry_snap: |
5955102c | 1364 | inode_lock(inode); |
03d254ed | 1365 | |
03d254ed | 1366 | /* We can write back this queue in page reclaim */ |
de1414a6 | 1367 | current->backing_dev_info = inode_to_bdi(inode); |
03d254ed | 1368 | |
55b0b31c YZ |
1369 | if (iocb->ki_flags & IOCB_APPEND) { |
1370 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); | |
1371 | if (err < 0) | |
1372 | goto out; | |
1373 | } | |
1374 | ||
3309dd04 AV |
1375 | err = generic_write_checks(iocb, from); |
1376 | if (err <= 0) | |
03d254ed YZ |
1377 | goto out; |
1378 | ||
3309dd04 AV |
1379 | pos = iocb->ki_pos; |
1380 | count = iov_iter_count(from); | |
2b83845f LH |
1381 | if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) { |
1382 | err = -EDQUOT; | |
1383 | goto out; | |
1384 | } | |
1385 | ||
5fa8e0a1 | 1386 | err = file_remove_privs(file); |
03d254ed YZ |
1387 | if (err) |
1388 | goto out; | |
1389 | ||
1390 | err = file_update_time(file); | |
1391 | if (err) | |
1392 | goto out; | |
1393 | ||
28127bdd YZ |
1394 | if (ci->i_inline_version != CEPH_INLINE_NONE) { |
1395 | err = ceph_uninline_data(file, NULL); | |
1396 | if (err < 0) | |
1397 | goto out; | |
1398 | } | |
1399 | ||
26544c62 | 1400 | /* FIXME: not complete since it doesn't account for being at quota */ |
b7ec35b3 | 1401 | if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL)) { |
03d254ed | 1402 | err = -ENOSPC; |
6070e0c1 YZ |
1403 | goto out; |
1404 | } | |
03d254ed | 1405 | |
ac7f29bf | 1406 | dout("aio_write %p %llx.%llx %llu~%zd getting caps. i_size %llu\n", |
99c88e69 | 1407 | inode, ceph_vinop(inode), pos, count, i_size_read(inode)); |
7971bd92 SW |
1408 | if (fi->fmode & CEPH_FILE_MODE_LAZY) |
1409 | want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; | |
1410 | else | |
1411 | want = CEPH_CAP_FILE_BUFFER; | |
03d254ed | 1412 | got = 0; |
3738daa6 YZ |
1413 | err = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, pos + count, |
1414 | &got, NULL); | |
03d254ed | 1415 | if (err < 0) |
37505d57 | 1416 | goto out; |
124e68e7 | 1417 | |
ac7f29bf | 1418 | dout("aio_write %p %llx.%llx %llu~%zd got cap refs on %s\n", |
03d254ed | 1419 | inode, ceph_vinop(inode), pos, count, ceph_cap_string(got)); |
7971bd92 SW |
1420 | |
1421 | if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 || | |
26544c62 JL |
1422 | (iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) || |
1423 | (ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) { | |
5dda377c | 1424 | struct ceph_snap_context *snapc; |
4908b822 | 1425 | struct iov_iter data; |
5955102c | 1426 | inode_unlock(inode); |
5dda377c YZ |
1427 | |
1428 | spin_lock(&ci->i_ceph_lock); | |
1429 | if (__ceph_have_pending_cap_snap(ci)) { | |
1430 | struct ceph_cap_snap *capsnap = | |
1431 | list_last_entry(&ci->i_cap_snaps, | |
1432 | struct ceph_cap_snap, | |
1433 | ci_item); | |
1434 | snapc = ceph_get_snap_context(capsnap->context); | |
1435 | } else { | |
1436 | BUG_ON(!ci->i_head_snapc); | |
1437 | snapc = ceph_get_snap_context(ci->i_head_snapc); | |
1438 | } | |
1439 | spin_unlock(&ci->i_ceph_lock); | |
1440 | ||
4908b822 AV |
1441 | /* we might need to revert back to that point */ |
1442 | data = *from; | |
2ba48ce5 | 1443 | if (iocb->ki_flags & IOCB_DIRECT) |
c8fe9b17 YZ |
1444 | written = ceph_direct_read_write(iocb, &data, snapc, |
1445 | &prealloc_cf); | |
e8344e66 | 1446 | else |
5dda377c | 1447 | written = ceph_sync_write(iocb, &data, pos, snapc); |
4908b822 AV |
1448 | if (written > 0) |
1449 | iov_iter_advance(from, written); | |
5dda377c | 1450 | ceph_put_snap_context(snapc); |
7971bd92 | 1451 | } else { |
b0d7c223 YZ |
1452 | /* |
1453 | * No need to acquire the i_truncate_mutex. Because | |
1454 | * the MDS revokes Fwb caps before sending truncate | |
1455 | * message to us. We can't get Fwb cap while there | |
1456 | * are pending vmtruncate. So write and vmtruncate | |
1457 | * can not run at the same time | |
1458 | */ | |
4908b822 | 1459 | written = generic_perform_write(file, from, pos); |
aec605f4 AV |
1460 | if (likely(written >= 0)) |
1461 | iocb->ki_pos = pos + written; | |
5955102c | 1462 | inode_unlock(inode); |
7971bd92 | 1463 | } |
d8de9ab6 | 1464 | |
03d254ed | 1465 | if (written >= 0) { |
fca65b4a | 1466 | int dirty; |
1ab302a0 | 1467 | |
be655596 | 1468 | spin_lock(&ci->i_ceph_lock); |
28127bdd | 1469 | ci->i_inline_version = CEPH_INLINE_NONE; |
f66fd9f0 YZ |
1470 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
1471 | &prealloc_cf); | |
be655596 | 1472 | spin_unlock(&ci->i_ceph_lock); |
fca65b4a SW |
1473 | if (dirty) |
1474 | __mark_inode_dirty(inode, dirty); | |
1ab302a0 LH |
1475 | if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos)) |
1476 | ceph_check_caps(ci, CHECK_CAPS_NODELAY, NULL); | |
124e68e7 | 1477 | } |
7971bd92 | 1478 | |
124e68e7 | 1479 | dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n", |
4908b822 | 1480 | inode, ceph_vinop(inode), pos, (unsigned)count, |
7971bd92 | 1481 | ceph_cap_string(got)); |
124e68e7 | 1482 | ceph_put_cap_refs(ci, got); |
7971bd92 | 1483 | |
a5cd74ad YZ |
1484 | if (written == -EOLDSNAPC) { |
1485 | dout("aio_write %p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n", | |
1486 | inode, ceph_vinop(inode), pos, (unsigned)count); | |
1487 | goto retry_snap; | |
1488 | } | |
1489 | ||
6aa657c8 | 1490 | if (written >= 0) { |
b7ec35b3 | 1491 | if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_NEARFULL)) |
6aa657c8 | 1492 | iocb->ki_flags |= IOCB_DSYNC; |
6aa657c8 | 1493 | written = generic_write_sync(iocb, written); |
6070e0c1 | 1494 | } |
03d254ed | 1495 | |
2f75e9e1 SW |
1496 | goto out_unlocked; |
1497 | ||
03d254ed | 1498 | out: |
5955102c | 1499 | inode_unlock(inode); |
2f75e9e1 | 1500 | out_unlocked: |
f66fd9f0 | 1501 | ceph_free_cap_flush(prealloc_cf); |
03d254ed | 1502 | current->backing_dev_info = NULL; |
03d254ed | 1503 | return written ? written : err; |
124e68e7 SW |
1504 | } |
1505 | ||
1506 | /* | |
1507 | * llseek. be sure to verify file size on SEEK_END. | |
1508 | */ | |
965c8e59 | 1509 | static loff_t ceph_llseek(struct file *file, loff_t offset, int whence) |
124e68e7 SW |
1510 | { |
1511 | struct inode *inode = file->f_mapping->host; | |
99c88e69 | 1512 | loff_t i_size; |
955818cd | 1513 | loff_t ret; |
124e68e7 | 1514 | |
5955102c | 1515 | inode_lock(inode); |
6a82c47a | 1516 | |
965c8e59 | 1517 | if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) { |
508b32d8 | 1518 | ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); |
955818cd | 1519 | if (ret < 0) |
124e68e7 | 1520 | goto out; |
06222e49 JB |
1521 | } |
1522 | ||
99c88e69 | 1523 | i_size = i_size_read(inode); |
965c8e59 | 1524 | switch (whence) { |
06222e49 | 1525 | case SEEK_END: |
99c88e69 | 1526 | offset += i_size; |
124e68e7 SW |
1527 | break; |
1528 | case SEEK_CUR: | |
1529 | /* | |
1530 | * Here we special-case the lseek(fd, 0, SEEK_CUR) | |
1531 | * position-querying operation. Avoid rewriting the "same" | |
1532 | * f_pos value back to the file because a concurrent read(), | |
1533 | * write() or lseek() might have altered it | |
1534 | */ | |
1535 | if (offset == 0) { | |
955818cd | 1536 | ret = file->f_pos; |
124e68e7 SW |
1537 | goto out; |
1538 | } | |
1539 | offset += file->f_pos; | |
1540 | break; | |
06222e49 | 1541 | case SEEK_DATA: |
397f2389 | 1542 | if (offset < 0 || offset >= i_size) { |
06222e49 JB |
1543 | ret = -ENXIO; |
1544 | goto out; | |
1545 | } | |
1546 | break; | |
1547 | case SEEK_HOLE: | |
397f2389 | 1548 | if (offset < 0 || offset >= i_size) { |
06222e49 JB |
1549 | ret = -ENXIO; |
1550 | goto out; | |
1551 | } | |
99c88e69 | 1552 | offset = i_size; |
06222e49 | 1553 | break; |
124e68e7 SW |
1554 | } |
1555 | ||
955818cd | 1556 | ret = vfs_setpos(file, offset, inode->i_sb->s_maxbytes); |
124e68e7 SW |
1557 | |
1558 | out: | |
5955102c | 1559 | inode_unlock(inode); |
955818cd | 1560 | return ret; |
124e68e7 SW |
1561 | } |
1562 | ||
ad7a60de LW |
1563 | static inline void ceph_zero_partial_page( |
1564 | struct inode *inode, loff_t offset, unsigned size) | |
1565 | { | |
1566 | struct page *page; | |
09cbfeaf | 1567 | pgoff_t index = offset >> PAGE_SHIFT; |
ad7a60de LW |
1568 | |
1569 | page = find_lock_page(inode->i_mapping, index); | |
1570 | if (page) { | |
1571 | wait_on_page_writeback(page); | |
09cbfeaf | 1572 | zero_user(page, offset & (PAGE_SIZE - 1), size); |
ad7a60de | 1573 | unlock_page(page); |
09cbfeaf | 1574 | put_page(page); |
ad7a60de LW |
1575 | } |
1576 | } | |
1577 | ||
1578 | static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset, | |
1579 | loff_t length) | |
1580 | { | |
09cbfeaf | 1581 | loff_t nearly = round_up(offset, PAGE_SIZE); |
ad7a60de LW |
1582 | if (offset < nearly) { |
1583 | loff_t size = nearly - offset; | |
1584 | if (length < size) | |
1585 | size = length; | |
1586 | ceph_zero_partial_page(inode, offset, size); | |
1587 | offset += size; | |
1588 | length -= size; | |
1589 | } | |
09cbfeaf KS |
1590 | if (length >= PAGE_SIZE) { |
1591 | loff_t size = round_down(length, PAGE_SIZE); | |
ad7a60de LW |
1592 | truncate_pagecache_range(inode, offset, offset + size - 1); |
1593 | offset += size; | |
1594 | length -= size; | |
1595 | } | |
1596 | if (length) | |
1597 | ceph_zero_partial_page(inode, offset, length); | |
1598 | } | |
1599 | ||
1600 | static int ceph_zero_partial_object(struct inode *inode, | |
1601 | loff_t offset, loff_t *length) | |
1602 | { | |
1603 | struct ceph_inode_info *ci = ceph_inode(inode); | |
1604 | struct ceph_fs_client *fsc = ceph_inode_to_client(inode); | |
1605 | struct ceph_osd_request *req; | |
1606 | int ret = 0; | |
1607 | loff_t zero = 0; | |
1608 | int op; | |
1609 | ||
1610 | if (!length) { | |
1611 | op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE; | |
1612 | length = &zero; | |
1613 | } else { | |
1614 | op = CEPH_OSD_OP_ZERO; | |
1615 | } | |
1616 | ||
1617 | req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, | |
1618 | ceph_vino(inode), | |
1619 | offset, length, | |
715e4cd4 | 1620 | 0, 1, op, |
54ea0046 | 1621 | CEPH_OSD_FLAG_WRITE, |
ad7a60de LW |
1622 | NULL, 0, 0, false); |
1623 | if (IS_ERR(req)) { | |
1624 | ret = PTR_ERR(req); | |
1625 | goto out; | |
1626 | } | |
1627 | ||
bb873b53 | 1628 | req->r_mtime = inode->i_mtime; |
ad7a60de LW |
1629 | ret = ceph_osdc_start_request(&fsc->client->osdc, req, false); |
1630 | if (!ret) { | |
1631 | ret = ceph_osdc_wait_request(&fsc->client->osdc, req); | |
1632 | if (ret == -ENOENT) | |
1633 | ret = 0; | |
1634 | } | |
1635 | ceph_osdc_put_request(req); | |
1636 | ||
1637 | out: | |
1638 | return ret; | |
1639 | } | |
1640 | ||
1641 | static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length) | |
1642 | { | |
1643 | int ret = 0; | |
1644 | struct ceph_inode_info *ci = ceph_inode(inode); | |
7627151e YZ |
1645 | s32 stripe_unit = ci->i_layout.stripe_unit; |
1646 | s32 stripe_count = ci->i_layout.stripe_count; | |
1647 | s32 object_size = ci->i_layout.object_size; | |
b314a90d SW |
1648 | u64 object_set_size = object_size * stripe_count; |
1649 | u64 nearly, t; | |
1650 | ||
1651 | /* round offset up to next period boundary */ | |
1652 | nearly = offset + object_set_size - 1; | |
1653 | t = nearly; | |
1654 | nearly -= do_div(t, object_set_size); | |
ad7a60de | 1655 | |
ad7a60de LW |
1656 | while (length && offset < nearly) { |
1657 | loff_t size = length; | |
1658 | ret = ceph_zero_partial_object(inode, offset, &size); | |
1659 | if (ret < 0) | |
1660 | return ret; | |
1661 | offset += size; | |
1662 | length -= size; | |
1663 | } | |
1664 | while (length >= object_set_size) { | |
1665 | int i; | |
1666 | loff_t pos = offset; | |
1667 | for (i = 0; i < stripe_count; ++i) { | |
1668 | ret = ceph_zero_partial_object(inode, pos, NULL); | |
1669 | if (ret < 0) | |
1670 | return ret; | |
1671 | pos += stripe_unit; | |
1672 | } | |
1673 | offset += object_set_size; | |
1674 | length -= object_set_size; | |
1675 | } | |
1676 | while (length) { | |
1677 | loff_t size = length; | |
1678 | ret = ceph_zero_partial_object(inode, offset, &size); | |
1679 | if (ret < 0) | |
1680 | return ret; | |
1681 | offset += size; | |
1682 | length -= size; | |
1683 | } | |
1684 | return ret; | |
1685 | } | |
1686 | ||
1687 | static long ceph_fallocate(struct file *file, int mode, | |
1688 | loff_t offset, loff_t length) | |
1689 | { | |
1690 | struct ceph_file_info *fi = file->private_data; | |
aa8b60e0 | 1691 | struct inode *inode = file_inode(file); |
ad7a60de LW |
1692 | struct ceph_inode_info *ci = ceph_inode(inode); |
1693 | struct ceph_osd_client *osdc = | |
1694 | &ceph_inode_to_client(inode)->client->osdc; | |
f66fd9f0 | 1695 | struct ceph_cap_flush *prealloc_cf; |
ad7a60de LW |
1696 | int want, got = 0; |
1697 | int dirty; | |
1698 | int ret = 0; | |
1699 | loff_t endoff = 0; | |
1700 | loff_t size; | |
1701 | ||
494d77bf YZ |
1702 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
1703 | return -EOPNOTSUPP; | |
1704 | ||
ad7a60de LW |
1705 | if (!S_ISREG(inode->i_mode)) |
1706 | return -EOPNOTSUPP; | |
1707 | ||
f66fd9f0 YZ |
1708 | prealloc_cf = ceph_alloc_cap_flush(); |
1709 | if (!prealloc_cf) | |
1710 | return -ENOMEM; | |
1711 | ||
5955102c | 1712 | inode_lock(inode); |
ad7a60de LW |
1713 | |
1714 | if (ceph_snap(inode) != CEPH_NOSNAP) { | |
1715 | ret = -EROFS; | |
1716 | goto unlock; | |
1717 | } | |
1718 | ||
2b83845f LH |
1719 | if (!(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE)) && |
1720 | ceph_quota_is_max_bytes_exceeded(inode, offset + length)) { | |
1721 | ret = -EDQUOT; | |
1722 | goto unlock; | |
1723 | } | |
1724 | ||
b7ec35b3 ID |
1725 | if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && |
1726 | !(mode & FALLOC_FL_PUNCH_HOLE)) { | |
ad7a60de LW |
1727 | ret = -ENOSPC; |
1728 | goto unlock; | |
1729 | } | |
1730 | ||
28127bdd YZ |
1731 | if (ci->i_inline_version != CEPH_INLINE_NONE) { |
1732 | ret = ceph_uninline_data(file, NULL); | |
1733 | if (ret < 0) | |
1734 | goto unlock; | |
1735 | } | |
1736 | ||
ad7a60de | 1737 | size = i_size_read(inode); |
42c99fc4 | 1738 | if (!(mode & FALLOC_FL_KEEP_SIZE)) { |
ad7a60de | 1739 | endoff = offset + length; |
42c99fc4 LH |
1740 | ret = inode_newsize_ok(inode, endoff); |
1741 | if (ret) | |
1742 | goto unlock; | |
1743 | } | |
ad7a60de LW |
1744 | |
1745 | if (fi->fmode & CEPH_FILE_MODE_LAZY) | |
1746 | want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; | |
1747 | else | |
1748 | want = CEPH_CAP_FILE_BUFFER; | |
1749 | ||
3738daa6 | 1750 | ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, endoff, &got, NULL); |
ad7a60de LW |
1751 | if (ret < 0) |
1752 | goto unlock; | |
1753 | ||
1754 | if (mode & FALLOC_FL_PUNCH_HOLE) { | |
1755 | if (offset < size) | |
1756 | ceph_zero_pagecache_range(inode, offset, length); | |
1757 | ret = ceph_zero_objects(inode, offset, length); | |
1758 | } else if (endoff > size) { | |
1759 | truncate_pagecache_range(inode, size, -1); | |
1760 | if (ceph_inode_set_size(inode, endoff)) | |
1761 | ceph_check_caps(ceph_inode(inode), | |
1762 | CHECK_CAPS_AUTHONLY, NULL); | |
1763 | } | |
1764 | ||
1765 | if (!ret) { | |
1766 | spin_lock(&ci->i_ceph_lock); | |
28127bdd | 1767 | ci->i_inline_version = CEPH_INLINE_NONE; |
f66fd9f0 YZ |
1768 | dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, |
1769 | &prealloc_cf); | |
ad7a60de LW |
1770 | spin_unlock(&ci->i_ceph_lock); |
1771 | if (dirty) | |
1772 | __mark_inode_dirty(inode, dirty); | |
1ab302a0 LH |
1773 | if ((endoff > size) && |
1774 | ceph_quota_is_max_bytes_approaching(inode, endoff)) | |
1775 | ceph_check_caps(ci, CHECK_CAPS_NODELAY, NULL); | |
ad7a60de LW |
1776 | } |
1777 | ||
1778 | ceph_put_cap_refs(ci, got); | |
1779 | unlock: | |
5955102c | 1780 | inode_unlock(inode); |
f66fd9f0 | 1781 | ceph_free_cap_flush(prealloc_cf); |
ad7a60de LW |
1782 | return ret; |
1783 | } | |
1784 | ||
124e68e7 SW |
1785 | const struct file_operations ceph_file_fops = { |
1786 | .open = ceph_open, | |
1787 | .release = ceph_release, | |
1788 | .llseek = ceph_llseek, | |
3644424d | 1789 | .read_iter = ceph_read_iter, |
4908b822 | 1790 | .write_iter = ceph_write_iter, |
124e68e7 SW |
1791 | .mmap = ceph_mmap, |
1792 | .fsync = ceph_fsync, | |
40819f6f GF |
1793 | .lock = ceph_lock, |
1794 | .flock = ceph_flock, | |
7ce469a5 | 1795 | .splice_read = generic_file_splice_read, |
3551dd79 | 1796 | .splice_write = iter_file_splice_write, |
124e68e7 SW |
1797 | .unlocked_ioctl = ceph_ioctl, |
1798 | .compat_ioctl = ceph_ioctl, | |
ad7a60de | 1799 | .fallocate = ceph_fallocate, |
124e68e7 SW |
1800 | }; |
1801 |