Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
40819f6f GF |
3 | |
4 | #include <linux/file.h> | |
5 | #include <linux/namei.h> | |
eb13e832 | 6 | #include <linux/random.h> |
40819f6f GF |
7 | |
8 | #include "super.h" | |
9 | #include "mds_client.h" | |
5970e15d | 10 | #include <linux/filelock.h> |
3d14c5d2 | 11 | #include <linux/ceph/pagelist.h> |
40819f6f | 12 | |
eb13e832 | 13 | static u64 lock_secret; |
9280be24 YZ |
14 | static int ceph_lock_wait_for_completion(struct ceph_mds_client *mdsc, |
15 | struct ceph_mds_request *req); | |
eb13e832 YZ |
16 | |
17 | static inline u64 secure_addr(void *addr) | |
18 | { | |
19 | u64 v = lock_secret ^ (u64)(unsigned long)addr; | |
20 | /* | |
21 | * Set the most significant bit, so that MDS knows the 'owner' | |
22 | * is sufficient to identify the owner of lock. (old code uses | |
23 | * both 'owner' and 'pid') | |
24 | */ | |
25 | v |= (1ULL << 63); | |
26 | return v; | |
27 | } | |
28 | ||
29 | void __init ceph_flock_init(void) | |
30 | { | |
31 | get_random_bytes(&lock_secret, sizeof(lock_secret)); | |
32 | } | |
33 | ||
89aa5930 YZ |
34 | static void ceph_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
35 | { | |
3956f35f | 36 | struct inode *inode = file_inode(dst->c.flc_file); |
89aa5930 | 37 | atomic_inc(&ceph_inode(inode)->i_filelock_ref); |
8e185871 | 38 | dst->fl_u.ceph.inode = igrab(inode); |
89aa5930 YZ |
39 | } |
40 | ||
8e185871 XL |
41 | /* |
42 | * Do not use the 'fl->fl_file' in release function, which | |
43 | * is possibly already released by another thread. | |
44 | */ | |
89aa5930 YZ |
45 | static void ceph_fl_release_lock(struct file_lock *fl) |
46 | { | |
8e185871 XL |
47 | struct inode *inode = fl->fl_u.ceph.inode; |
48 | struct ceph_inode_info *ci; | |
49 | ||
50 | /* | |
51 | * If inode is NULL it should be a request file_lock, | |
52 | * nothing we can do. | |
53 | */ | |
54 | if (!inode) | |
55 | return; | |
56 | ||
57 | ci = ceph_inode(inode); | |
b3f8d68f YZ |
58 | if (atomic_dec_and_test(&ci->i_filelock_ref)) { |
59 | /* clear error when all locks are released */ | |
60 | spin_lock(&ci->i_ceph_lock); | |
61 | ci->i_ceph_flags &= ~CEPH_I_ERROR_FILELOCK; | |
62 | spin_unlock(&ci->i_ceph_lock); | |
63 | } | |
8e185871 XL |
64 | fl->fl_u.ceph.inode = NULL; |
65 | iput(inode); | |
89aa5930 YZ |
66 | } |
67 | ||
68 | static const struct file_lock_operations ceph_fl_lock_ops = { | |
69 | .fl_copy_lock = ceph_fl_copy_lock, | |
70 | .fl_release_private = ceph_fl_release_lock, | |
71 | }; | |
72 | ||
06a1ad43 | 73 | /* |
40819f6f GF |
74 | * Implement fcntl and flock locking functions. |
75 | */ | |
89aa5930 | 76 | static int ceph_lock_message(u8 lock_type, u16 operation, struct inode *inode, |
637ae8d5 | 77 | int cmd, u8 wait, struct file_lock *fl) |
40819f6f | 78 | { |
2678da88 | 79 | struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); |
38d46409 | 80 | struct ceph_client *cl = mdsc->fsc->client; |
40819f6f GF |
81 | struct ceph_mds_request *req; |
82 | int err; | |
637ae8d5 | 83 | u64 length = 0; |
eb13e832 | 84 | u64 owner; |
40819f6f | 85 | |
89aa5930 YZ |
86 | if (operation == CEPH_MDS_OP_SETFILELOCK) { |
87 | /* | |
88 | * increasing i_filelock_ref closes race window between | |
89 | * handling request reply and adding file_lock struct to | |
90 | * inode. Otherwise, auth caps may get trimmed in the | |
91 | * window. Caller function will decrease the counter. | |
92 | */ | |
93 | fl->fl_ops = &ceph_fl_lock_ops; | |
ff5d913d | 94 | fl->fl_ops->fl_copy_lock(fl, NULL); |
89aa5930 YZ |
95 | } |
96 | ||
9280be24 YZ |
97 | if (operation != CEPH_MDS_OP_SETFILELOCK || cmd == CEPH_LOCK_UNLOCK) |
98 | wait = 0; | |
99 | ||
40819f6f GF |
100 | req = ceph_mdsc_create_request(mdsc, operation, USE_AUTH_MDS); |
101 | if (IS_ERR(req)) | |
102 | return PTR_ERR(req); | |
70b666c3 SW |
103 | req->r_inode = inode; |
104 | ihold(inode); | |
3bd58143 | 105 | req->r_num_caps = 1; |
40819f6f | 106 | |
637ae8d5 HS |
107 | /* mds requires start and length rather than start and end */ |
108 | if (LLONG_MAX == fl->fl_end) | |
109 | length = 0; | |
110 | else | |
111 | length = fl->fl_end - fl->fl_start + 1; | |
112 | ||
3956f35f | 113 | owner = secure_addr(fl->c.flc_owner); |
eb13e832 | 114 | |
38d46409 XL |
115 | doutc(cl, "rule: %d, op: %d, owner: %llx, pid: %llu, " |
116 | "start: %llu, length: %llu, wait: %d, type: %d\n", | |
3956f35f JL |
117 | (int)lock_type, (int)operation, owner, |
118 | (u64) fl->c.flc_pid, | |
119 | fl->fl_start, length, wait, fl->c.flc_type); | |
637ae8d5 | 120 | |
40819f6f GF |
121 | req->r_args.filelock_change.rule = lock_type; |
122 | req->r_args.filelock_change.type = cmd; | |
eb13e832 | 123 | req->r_args.filelock_change.owner = cpu_to_le64(owner); |
3956f35f | 124 | req->r_args.filelock_change.pid = cpu_to_le64((u64) fl->c.flc_pid); |
637ae8d5 | 125 | req->r_args.filelock_change.start = cpu_to_le64(fl->fl_start); |
40819f6f GF |
126 | req->r_args.filelock_change.length = cpu_to_le64(length); |
127 | req->r_args.filelock_change.wait = wait; | |
128 | ||
9eaa7b79 JL |
129 | err = ceph_mdsc_submit_request(mdsc, inode, req); |
130 | if (!err) | |
131 | err = ceph_mdsc_wait_request(mdsc, req, wait ? | |
132 | ceph_lock_wait_for_completion : NULL); | |
28a28261 | 133 | if (!err && operation == CEPH_MDS_OP_GETFILELOCK) { |
3956f35f | 134 | fl->c.flc_pid = -le64_to_cpu(req->r_reply_info.filelock_reply->pid); |
a5b10629 | 135 | if (CEPH_LOCK_SHARED == req->r_reply_info.filelock_reply->type) |
3956f35f | 136 | fl->c.flc_type = F_RDLCK; |
a5b10629 | 137 | else if (CEPH_LOCK_EXCL == req->r_reply_info.filelock_reply->type) |
3956f35f | 138 | fl->c.flc_type = F_WRLCK; |
a5b10629 | 139 | else |
3956f35f | 140 | fl->c.flc_type = F_UNLCK; |
a5b10629 HS |
141 | |
142 | fl->fl_start = le64_to_cpu(req->r_reply_info.filelock_reply->start); | |
143 | length = le64_to_cpu(req->r_reply_info.filelock_reply->start) + | |
144 | le64_to_cpu(req->r_reply_info.filelock_reply->length); | |
145 | if (length >= 1) | |
146 | fl->fl_end = length -1; | |
147 | else | |
148 | fl->fl_end = 0; | |
149 | ||
150 | } | |
40819f6f | 151 | ceph_mdsc_put_request(req); |
38d46409 XL |
152 | doutc(cl, "rule: %d, op: %d, pid: %llu, start: %llu, " |
153 | "length: %llu, wait: %d, type: %d, err code %d\n", | |
3956f35f JL |
154 | (int)lock_type, (int)operation, (u64) fl->c.flc_pid, |
155 | fl->fl_start, length, wait, fl->c.flc_type, err); | |
40819f6f GF |
156 | return err; |
157 | } | |
158 | ||
9280be24 YZ |
159 | static int ceph_lock_wait_for_completion(struct ceph_mds_client *mdsc, |
160 | struct ceph_mds_request *req) | |
161 | { | |
38d46409 | 162 | struct ceph_client *cl = mdsc->fsc->client; |
9280be24 YZ |
163 | struct ceph_mds_request *intr_req; |
164 | struct inode *inode = req->r_inode; | |
165 | int err, lock_type; | |
166 | ||
167 | BUG_ON(req->r_op != CEPH_MDS_OP_SETFILELOCK); | |
168 | if (req->r_args.filelock_change.rule == CEPH_LOCK_FCNTL) | |
169 | lock_type = CEPH_LOCK_FCNTL_INTR; | |
170 | else if (req->r_args.filelock_change.rule == CEPH_LOCK_FLOCK) | |
171 | lock_type = CEPH_LOCK_FLOCK_INTR; | |
172 | else | |
173 | BUG_ON(1); | |
174 | BUG_ON(req->r_args.filelock_change.type == CEPH_LOCK_UNLOCK); | |
175 | ||
176 | err = wait_for_completion_interruptible(&req->r_completion); | |
177 | if (!err) | |
178 | return 0; | |
179 | ||
38d46409 | 180 | doutc(cl, "request %llu was interrupted\n", req->r_tid); |
9280be24 | 181 | |
92e57e62 YZ |
182 | mutex_lock(&mdsc->mutex); |
183 | if (test_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags)) { | |
184 | err = 0; | |
185 | } else { | |
186 | /* | |
187 | * ensure we aren't running concurrently with | |
188 | * ceph_fill_trace or ceph_readdir_prepopulate, which | |
189 | * rely on locks (dir mutex) held by our caller. | |
190 | */ | |
191 | mutex_lock(&req->r_fill_mutex); | |
192 | req->r_err = err; | |
193 | set_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags); | |
194 | mutex_unlock(&req->r_fill_mutex); | |
195 | ||
196 | if (!req->r_session) { | |
197 | // haven't sent the request | |
198 | err = 0; | |
199 | } | |
200 | } | |
201 | mutex_unlock(&mdsc->mutex); | |
202 | if (!err) | |
203 | return 0; | |
204 | ||
9280be24 YZ |
205 | intr_req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETFILELOCK, |
206 | USE_AUTH_MDS); | |
207 | if (IS_ERR(intr_req)) | |
208 | return PTR_ERR(intr_req); | |
209 | ||
210 | intr_req->r_inode = inode; | |
211 | ihold(inode); | |
212 | intr_req->r_num_caps = 1; | |
213 | ||
214 | intr_req->r_args.filelock_change = req->r_args.filelock_change; | |
215 | intr_req->r_args.filelock_change.rule = lock_type; | |
216 | intr_req->r_args.filelock_change.type = CEPH_LOCK_UNLOCK; | |
217 | ||
218 | err = ceph_mdsc_do_request(mdsc, inode, intr_req); | |
219 | ceph_mdsc_put_request(intr_req); | |
220 | ||
221 | if (err && err != -ERESTARTSYS) | |
222 | return err; | |
223 | ||
92e57e62 | 224 | wait_for_completion_killable(&req->r_safe_completion); |
9280be24 YZ |
225 | return 0; |
226 | } | |
227 | ||
bbb480ab YZ |
228 | static int try_unlock_file(struct file *file, struct file_lock *fl) |
229 | { | |
230 | int err; | |
3956f35f JL |
231 | unsigned int orig_flags = fl->c.flc_flags; |
232 | fl->c.flc_flags |= FL_EXISTS; | |
bbb480ab | 233 | err = locks_lock_file_wait(file, fl); |
3956f35f | 234 | fl->c.flc_flags = orig_flags; |
bbb480ab YZ |
235 | if (err == -ENOENT) { |
236 | if (!(orig_flags & FL_EXISTS)) | |
237 | err = 0; | |
238 | return err; | |
239 | } | |
240 | return 1; | |
241 | } | |
242 | ||
06a1ad43 | 243 | /* |
40819f6f GF |
244 | * Attempt to set an fcntl lock. |
245 | * For now, this just goes away to the server. Later it may be more awesome. | |
246 | */ | |
247 | int ceph_lock(struct file *file, int cmd, struct file_lock *fl) | |
248 | { | |
89aa5930 | 249 | struct inode *inode = file_inode(file); |
b3f8d68f | 250 | struct ceph_inode_info *ci = ceph_inode(inode); |
38d46409 | 251 | struct ceph_client *cl = ceph_inode_to_client(inode); |
b3f8d68f | 252 | int err = 0; |
40819f6f | 253 | u16 op = CEPH_MDS_OP_SETFILELOCK; |
89aa5930 | 254 | u8 wait = 0; |
b3f8d68f | 255 | u8 lock_cmd; |
40819f6f | 256 | |
3956f35f | 257 | if (!(fl->c.flc_flags & FL_POSIX)) |
eb70c0ce | 258 | return -ENOLCK; |
eb70c0ce | 259 | |
5d6451b1 JL |
260 | if (ceph_inode_is_shutdown(inode)) |
261 | return -ESTALE; | |
262 | ||
3956f35f | 263 | doutc(cl, "fl_owner: %p\n", fl->c.flc_owner); |
40819f6f GF |
264 | |
265 | /* set wait bit as appropriate, then make command as Ceph expects it*/ | |
0e8e95d6 | 266 | if (IS_GETLK(cmd)) |
40819f6f | 267 | op = CEPH_MDS_OP_GETFILELOCK; |
0e8e95d6 YZ |
268 | else if (IS_SETLKW(cmd)) |
269 | wait = 1; | |
40819f6f | 270 | |
b3f8d68f YZ |
271 | spin_lock(&ci->i_ceph_lock); |
272 | if (ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) { | |
273 | err = -EIO; | |
b3f8d68f YZ |
274 | } |
275 | spin_unlock(&ci->i_ceph_lock); | |
276 | if (err < 0) { | |
75e9570c | 277 | if (op == CEPH_MDS_OP_SETFILELOCK && lock_is_unlock(fl)) |
b3f8d68f YZ |
278 | posix_lock_file(file, fl, NULL); |
279 | return err; | |
89aa5930 YZ |
280 | } |
281 | ||
75e9570c | 282 | if (lock_is_read(fl)) |
40819f6f | 283 | lock_cmd = CEPH_LOCK_SHARED; |
75e9570c | 284 | else if (lock_is_write(fl)) |
40819f6f GF |
285 | lock_cmd = CEPH_LOCK_EXCL; |
286 | else | |
287 | lock_cmd = CEPH_LOCK_UNLOCK; | |
288 | ||
75e9570c | 289 | if (op == CEPH_MDS_OP_SETFILELOCK && lock_is_unlock(fl)) { |
bbb480ab YZ |
290 | err = try_unlock_file(file, fl); |
291 | if (err <= 0) | |
292 | return err; | |
293 | } | |
294 | ||
89aa5930 | 295 | err = ceph_lock_message(CEPH_LOCK_FCNTL, op, inode, lock_cmd, wait, fl); |
40819f6f | 296 | if (!err) { |
3956f35f | 297 | if (op == CEPH_MDS_OP_SETFILELOCK && F_UNLCK != fl->c.flc_type) { |
38d46409 | 298 | doutc(cl, "locking locally\n"); |
a5b10629 | 299 | err = posix_lock_file(file, fl, NULL); |
b3f8d68f | 300 | if (err) { |
0c1f91f2 SW |
301 | /* undo! This should only happen if |
302 | * the kernel detects local | |
303 | * deadlock. */ | |
89aa5930 | 304 | ceph_lock_message(CEPH_LOCK_FCNTL, op, inode, |
a5b10629 | 305 | CEPH_LOCK_UNLOCK, 0, fl); |
38d46409 XL |
306 | doutc(cl, "got %d on posix_lock_file, undid lock\n", |
307 | err); | |
a5b10629 | 308 | } |
40819f6f | 309 | } |
40819f6f GF |
310 | } |
311 | return err; | |
312 | } | |
313 | ||
314 | int ceph_flock(struct file *file, int cmd, struct file_lock *fl) | |
315 | { | |
89aa5930 | 316 | struct inode *inode = file_inode(file); |
b3f8d68f | 317 | struct ceph_inode_info *ci = ceph_inode(inode); |
38d46409 | 318 | struct ceph_client *cl = ceph_inode_to_client(inode); |
b3f8d68f | 319 | int err = 0; |
0e8e95d6 | 320 | u8 wait = 0; |
b3f8d68f | 321 | u8 lock_cmd; |
40819f6f | 322 | |
3956f35f | 323 | if (!(fl->c.flc_flags & FL_FLOCK)) |
eb70c0ce | 324 | return -ENOLCK; |
eb70c0ce | 325 | |
5d6451b1 JL |
326 | if (ceph_inode_is_shutdown(inode)) |
327 | return -ESTALE; | |
328 | ||
3956f35f | 329 | doutc(cl, "fl_file: %p\n", fl->c.flc_file); |
40819f6f | 330 | |
b3f8d68f YZ |
331 | spin_lock(&ci->i_ceph_lock); |
332 | if (ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) { | |
333 | err = -EIO; | |
b3f8d68f YZ |
334 | } |
335 | spin_unlock(&ci->i_ceph_lock); | |
336 | if (err < 0) { | |
75e9570c | 337 | if (lock_is_unlock(fl)) |
b3f8d68f YZ |
338 | locks_lock_file_wait(file, fl); |
339 | return err; | |
340 | } | |
89aa5930 | 341 | |
0e8e95d6 YZ |
342 | if (IS_SETLKW(cmd)) |
343 | wait = 1; | |
344 | ||
75e9570c | 345 | if (lock_is_read(fl)) |
40819f6f | 346 | lock_cmd = CEPH_LOCK_SHARED; |
75e9570c | 347 | else if (lock_is_write(fl)) |
40819f6f GF |
348 | lock_cmd = CEPH_LOCK_EXCL; |
349 | else | |
350 | lock_cmd = CEPH_LOCK_UNLOCK; | |
40819f6f | 351 | |
75e9570c | 352 | if (lock_is_unlock(fl)) { |
bbb480ab YZ |
353 | err = try_unlock_file(file, fl); |
354 | if (err <= 0) | |
355 | return err; | |
356 | } | |
357 | ||
40819f6f | 358 | err = ceph_lock_message(CEPH_LOCK_FLOCK, CEPH_MDS_OP_SETFILELOCK, |
89aa5930 | 359 | inode, lock_cmd, wait, fl); |
3956f35f | 360 | if (!err && F_UNLCK != fl->c.flc_type) { |
4f656367 | 361 | err = locks_lock_file_wait(file, fl); |
40819f6f GF |
362 | if (err) { |
363 | ceph_lock_message(CEPH_LOCK_FLOCK, | |
364 | CEPH_MDS_OP_SETFILELOCK, | |
89aa5930 | 365 | inode, CEPH_LOCK_UNLOCK, 0, fl); |
38d46409 XL |
366 | doutc(cl, "got %d on locks_lock_file_wait, undid lock\n", |
367 | err); | |
40819f6f | 368 | } |
40819f6f GF |
369 | } |
370 | return err; | |
371 | } | |
372 | ||
5263e31e JL |
373 | /* |
374 | * Fills in the passed counter variables, so you can prepare pagelist metadata | |
375 | * before calling ceph_encode_locks. | |
40819f6f GF |
376 | */ |
377 | void ceph_count_locks(struct inode *inode, int *fcntl_count, int *flock_count) | |
378 | { | |
38d46409 | 379 | struct ceph_client *cl = ceph_inode_to_client(inode); |
e084c1bd | 380 | struct file_lock *lock; |
5263e31e | 381 | struct file_lock_context *ctx; |
40819f6f GF |
382 | |
383 | *fcntl_count = 0; | |
384 | *flock_count = 0; | |
385 | ||
d4e78663 | 386 | ctx = locks_inode_context(inode); |
5263e31e | 387 | if (ctx) { |
e084c1bd | 388 | spin_lock(&ctx->flc_lock); |
75e9570c | 389 | for_each_file_lock(lock, &ctx->flc_posix) |
e084c1bd | 390 | ++(*fcntl_count); |
75e9570c | 391 | for_each_file_lock(lock, &ctx->flc_flock) |
e084c1bd JL |
392 | ++(*flock_count); |
393 | spin_unlock(&ctx->flc_lock); | |
40819f6f | 394 | } |
38d46409 XL |
395 | doutc(cl, "counted %d flock locks and %d fcntl locks\n", |
396 | *flock_count, *fcntl_count); | |
40819f6f GF |
397 | } |
398 | ||
c6db8472 YZ |
399 | /* |
400 | * Given a pointer to a lock, convert it to a ceph filelock | |
401 | */ | |
38d46409 XL |
402 | static int lock_to_ceph_filelock(struct inode *inode, |
403 | struct file_lock *lock, | |
c6db8472 YZ |
404 | struct ceph_filelock *cephlock) |
405 | { | |
38d46409 | 406 | struct ceph_client *cl = ceph_inode_to_client(inode); |
c6db8472 | 407 | int err = 0; |
38d46409 | 408 | |
c6db8472 YZ |
409 | cephlock->start = cpu_to_le64(lock->fl_start); |
410 | cephlock->length = cpu_to_le64(lock->fl_end - lock->fl_start + 1); | |
411 | cephlock->client = cpu_to_le64(0); | |
3956f35f JL |
412 | cephlock->pid = cpu_to_le64((u64) lock->c.flc_pid); |
413 | cephlock->owner = cpu_to_le64(secure_addr(lock->c.flc_owner)); | |
c6db8472 | 414 | |
3956f35f | 415 | switch (lock->c.flc_type) { |
c6db8472 YZ |
416 | case F_RDLCK: |
417 | cephlock->type = CEPH_LOCK_SHARED; | |
418 | break; | |
419 | case F_WRLCK: | |
420 | cephlock->type = CEPH_LOCK_EXCL; | |
421 | break; | |
422 | case F_UNLCK: | |
423 | cephlock->type = CEPH_LOCK_UNLOCK; | |
424 | break; | |
425 | default: | |
3956f35f JL |
426 | doutc(cl, "Have unknown lock type %d\n", |
427 | lock->c.flc_type); | |
c6db8472 YZ |
428 | err = -EINVAL; |
429 | } | |
430 | ||
431 | return err; | |
432 | } | |
433 | ||
06a1ad43 | 434 | /* |
39be95e9 | 435 | * Encode the flock and fcntl locks for the given inode into the ceph_filelock |
1c8c601a | 436 | * array. Must be called with inode->i_lock already held. |
39be95e9 | 437 | * If we encounter more of a specific lock type than expected, return -ENOSPC. |
40819f6f | 438 | */ |
39be95e9 JS |
439 | int ceph_encode_locks_to_buffer(struct inode *inode, |
440 | struct ceph_filelock *flocks, | |
441 | int num_fcntl_locks, int num_flock_locks) | |
40819f6f GF |
442 | { |
443 | struct file_lock *lock; | |
d4e78663 | 444 | struct file_lock_context *ctx = locks_inode_context(inode); |
38d46409 | 445 | struct ceph_client *cl = ceph_inode_to_client(inode); |
40819f6f | 446 | int err = 0; |
fca4451a GF |
447 | int seen_fcntl = 0; |
448 | int seen_flock = 0; | |
39be95e9 | 449 | int l = 0; |
40819f6f | 450 | |
38d46409 XL |
451 | doutc(cl, "encoding %d flock and %d fcntl locks\n", num_flock_locks, |
452 | num_fcntl_locks); | |
39be95e9 | 453 | |
bd61e0a9 JL |
454 | if (!ctx) |
455 | return 0; | |
456 | ||
6109c850 | 457 | spin_lock(&ctx->flc_lock); |
75e9570c | 458 | for_each_file_lock(lock, &ctx->flc_posix) { |
bd61e0a9 JL |
459 | ++seen_fcntl; |
460 | if (seen_fcntl > num_fcntl_locks) { | |
461 | err = -ENOSPC; | |
462 | goto fail; | |
40819f6f | 463 | } |
38d46409 | 464 | err = lock_to_ceph_filelock(inode, lock, &flocks[l]); |
bd61e0a9 JL |
465 | if (err) |
466 | goto fail; | |
467 | ++l; | |
40819f6f | 468 | } |
75e9570c | 469 | for_each_file_lock(lock, &ctx->flc_flock) { |
bd61e0a9 JL |
470 | ++seen_flock; |
471 | if (seen_flock > num_flock_locks) { | |
472 | err = -ENOSPC; | |
473 | goto fail; | |
40819f6f | 474 | } |
38d46409 | 475 | err = lock_to_ceph_filelock(inode, lock, &flocks[l]); |
bd61e0a9 JL |
476 | if (err) |
477 | goto fail; | |
478 | ++l; | |
40819f6f GF |
479 | } |
480 | fail: | |
6109c850 | 481 | spin_unlock(&ctx->flc_lock); |
40819f6f GF |
482 | return err; |
483 | } | |
484 | ||
06a1ad43 | 485 | /* |
39be95e9 JS |
486 | * Copy the encoded flock and fcntl locks into the pagelist. |
487 | * Format is: #fcntl locks, sequential fcntl locks, #flock locks, | |
488 | * sequential flock locks. | |
489 | * Returns zero on success. | |
490 | */ | |
491 | int ceph_locks_to_pagelist(struct ceph_filelock *flocks, | |
492 | struct ceph_pagelist *pagelist, | |
493 | int num_fcntl_locks, int num_flock_locks) | |
494 | { | |
495 | int err = 0; | |
496 | __le32 nlocks; | |
497 | ||
498 | nlocks = cpu_to_le32(num_fcntl_locks); | |
499 | err = ceph_pagelist_append(pagelist, &nlocks, sizeof(nlocks)); | |
500 | if (err) | |
501 | goto out_fail; | |
502 | ||
4deb14a2 YZ |
503 | if (num_fcntl_locks > 0) { |
504 | err = ceph_pagelist_append(pagelist, flocks, | |
505 | num_fcntl_locks * sizeof(*flocks)); | |
506 | if (err) | |
507 | goto out_fail; | |
508 | } | |
39be95e9 JS |
509 | |
510 | nlocks = cpu_to_le32(num_flock_locks); | |
511 | err = ceph_pagelist_append(pagelist, &nlocks, sizeof(nlocks)); | |
512 | if (err) | |
513 | goto out_fail; | |
514 | ||
4deb14a2 YZ |
515 | if (num_flock_locks > 0) { |
516 | err = ceph_pagelist_append(pagelist, &flocks[num_fcntl_locks], | |
517 | num_flock_locks * sizeof(*flocks)); | |
518 | } | |
39be95e9 JS |
519 | out_fail: |
520 | return err; | |
521 | } |