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Commit | Line | Data |
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5db11c21 MM |
1 | /* |
2 | * (C) 2001 Clemson University and The University of Chicago | |
3 | * | |
4 | * Changes by Acxiom Corporation to add protocol version to kernel | |
5 | * communication, Copyright Acxiom Corporation, 2005. | |
6 | * | |
7 | * See COPYING in top-level directory. | |
8 | */ | |
9 | ||
10 | #include "protocol.h" | |
575e9461 MM |
11 | #include "orangefs-kernel.h" |
12 | #include "orangefs-dev-proto.h" | |
13 | #include "orangefs-bufmap.h" | |
5db11c21 MM |
14 | |
15 | #include <linux/debugfs.h> | |
16 | #include <linux/slab.h> | |
17 | ||
18 | /* this file implements the /dev/pvfs2-req device node */ | |
19 | ||
20 | static int open_access_count; | |
21 | ||
22 | #define DUMP_DEVICE_ERROR() \ | |
23 | do { \ | |
24 | gossip_err("*****************************************************\n");\ | |
8bb8aefd | 25 | gossip_err("ORANGEFS Device Error: You cannot open the device file "); \ |
5db11c21 | 26 | gossip_err("\n/dev/%s more than once. Please make sure that\nthere " \ |
8bb8aefd | 27 | "are no ", ORANGEFS_REQDEVICE_NAME); \ |
5db11c21 MM |
28 | gossip_err("instances of a program using this device\ncurrently " \ |
29 | "running. (You must verify this!)\n"); \ | |
30 | gossip_err("For example, you can use the lsof program as follows:\n");\ | |
31 | gossip_err("'lsof | grep %s' (run this as root)\n", \ | |
8bb8aefd | 32 | ORANGEFS_REQDEVICE_NAME); \ |
5db11c21 MM |
33 | gossip_err(" open_access_count = %d\n", open_access_count); \ |
34 | gossip_err("*****************************************************\n");\ | |
35 | } while (0) | |
36 | ||
37 | static int hash_func(__u64 tag, int table_size) | |
38 | { | |
2c590d5f | 39 | return do_div(tag, (unsigned int)table_size); |
5db11c21 MM |
40 | } |
41 | ||
8bb8aefd | 42 | static void orangefs_devreq_add_op(struct orangefs_kernel_op_s *op) |
5db11c21 MM |
43 | { |
44 | int index = hash_func(op->tag, hash_table_size); | |
45 | ||
5db11c21 | 46 | list_add_tail(&op->list, &htable_ops_in_progress[index]); |
5db11c21 MM |
47 | } |
48 | ||
8bb8aefd | 49 | static struct orangefs_kernel_op_s *orangefs_devreq_remove_op(__u64 tag) |
5db11c21 | 50 | { |
8bb8aefd | 51 | struct orangefs_kernel_op_s *op, *next; |
5db11c21 MM |
52 | int index; |
53 | ||
54 | index = hash_func(tag, hash_table_size); | |
55 | ||
56 | spin_lock(&htable_ops_in_progress_lock); | |
57 | list_for_each_entry_safe(op, | |
58 | next, | |
59 | &htable_ops_in_progress[index], | |
60 | list) { | |
ed42fe05 AV |
61 | if (op->tag == tag && !op_state_purged(op)) { |
62 | list_del_init(&op->list); | |
63 | get_op(op); /* increase ref count. */ | |
5db11c21 MM |
64 | spin_unlock(&htable_ops_in_progress_lock); |
65 | return op; | |
66 | } | |
67 | } | |
68 | ||
69 | spin_unlock(&htable_ops_in_progress_lock); | |
70 | return NULL; | |
71 | } | |
72 | ||
8bb8aefd | 73 | static int orangefs_devreq_open(struct inode *inode, struct file *file) |
5db11c21 MM |
74 | { |
75 | int ret = -EINVAL; | |
76 | ||
77 | if (!(file->f_flags & O_NONBLOCK)) { | |
97f10027 MM |
78 | gossip_err("%s: device cannot be opened in blocking mode\n", |
79 | __func__); | |
5db11c21 MM |
80 | goto out; |
81 | } | |
82 | ret = -EACCES; | |
97f10027 | 83 | gossip_debug(GOSSIP_DEV_DEBUG, "client-core: opening device\n"); |
5db11c21 MM |
84 | mutex_lock(&devreq_mutex); |
85 | ||
86 | if (open_access_count == 0) { | |
fee25ce1 | 87 | open_access_count = 1; |
fb6d2526 | 88 | ret = 0; |
5db11c21 MM |
89 | } else { |
90 | DUMP_DEVICE_ERROR(); | |
91 | } | |
92 | mutex_unlock(&devreq_mutex); | |
93 | ||
94 | out: | |
95 | ||
96 | gossip_debug(GOSSIP_DEV_DEBUG, | |
97 | "pvfs2-client-core: open device complete (ret = %d)\n", | |
98 | ret); | |
99 | return ret; | |
100 | } | |
101 | ||
97f10027 | 102 | /* Function for read() callers into the device */ |
8bb8aefd | 103 | static ssize_t orangefs_devreq_read(struct file *file, |
5db11c21 MM |
104 | char __user *buf, |
105 | size_t count, loff_t *offset) | |
106 | { | |
8bb8aefd YL |
107 | struct orangefs_kernel_op_s *op, *temp; |
108 | __s32 proto_ver = ORANGEFS_KERNEL_PROTO_VERSION; | |
109 | static __s32 magic = ORANGEFS_DEVREQ_MAGIC; | |
110 | struct orangefs_kernel_op_s *cur_op = NULL; | |
24c8d080 | 111 | unsigned long ret; |
5db11c21 | 112 | |
24c8d080 | 113 | /* We do not support blocking IO. */ |
5db11c21 | 114 | if (!(file->f_flags & O_NONBLOCK)) { |
97f10027 MM |
115 | gossip_err("%s: blocking read from client-core.\n", |
116 | __func__); | |
5db11c21 | 117 | return -EINVAL; |
24c8d080 MB |
118 | } |
119 | ||
120 | /* | |
a762ae6d | 121 | * The client will do an ioctl to find MAX_DEV_REQ_UPSIZE, then |
24c8d080 MB |
122 | * always read with that size buffer. |
123 | */ | |
a762ae6d | 124 | if (count != MAX_DEV_REQ_UPSIZE) { |
24c8d080 MB |
125 | gossip_err("orangefs: client-core tried to read wrong size\n"); |
126 | return -EINVAL; | |
127 | } | |
128 | ||
ed42fe05 | 129 | restart: |
24c8d080 | 130 | /* Get next op (if any) from top of list. */ |
8bb8aefd YL |
131 | spin_lock(&orangefs_request_list_lock); |
132 | list_for_each_entry_safe(op, temp, &orangefs_request_list, list) { | |
24c8d080 MB |
133 | __s32 fsid; |
134 | /* This lock is held past the end of the loop when we break. */ | |
135 | spin_lock(&op->lock); | |
ed42fe05 AV |
136 | if (unlikely(op_state_purged(op))) { |
137 | spin_unlock(&op->lock); | |
138 | continue; | |
139 | } | |
24c8d080 MB |
140 | |
141 | fsid = fsid_of_op(op); | |
8bb8aefd | 142 | if (fsid != ORANGEFS_FS_ID_NULL) { |
24c8d080 MB |
143 | int ret; |
144 | /* Skip ops whose filesystem needs to be mounted. */ | |
145 | ret = fs_mount_pending(fsid); | |
146 | if (ret == 1) { | |
5db11c21 | 147 | gossip_debug(GOSSIP_DEV_DEBUG, |
5090c967 MM |
148 | "%s: mount pending, skipping op tag " |
149 | "%llu %s\n", | |
150 | __func__, | |
151 | llu(op->tag), | |
152 | get_opname_string(op)); | |
24c8d080 MB |
153 | spin_unlock(&op->lock); |
154 | continue; | |
97f10027 MM |
155 | /* |
156 | * Skip ops whose filesystem we don't know about unless | |
157 | * it is being mounted. | |
158 | */ | |
24c8d080 MB |
159 | /* XXX: is there a better way to detect this? */ |
160 | } else if (ret == -1 && | |
97f10027 MM |
161 | !(op->upcall.type == |
162 | ORANGEFS_VFS_OP_FS_MOUNT || | |
163 | op->upcall.type == | |
164 | ORANGEFS_VFS_OP_GETATTR)) { | |
24c8d080 MB |
165 | gossip_debug(GOSSIP_DEV_DEBUG, |
166 | "orangefs: skipping op tag %llu %s\n", | |
167 | llu(op->tag), get_opname_string(op)); | |
168 | gossip_err( | |
169 | "orangefs: ERROR: fs_mount_pending %d\n", | |
170 | fsid); | |
171 | spin_unlock(&op->lock); | |
5db11c21 | 172 | continue; |
5db11c21 MM |
173 | } |
174 | } | |
24c8d080 MB |
175 | /* |
176 | * Either this op does not pertain to a filesystem, is mounting | |
177 | * a filesystem, or pertains to a mounted filesystem. Let it | |
178 | * through. | |
179 | */ | |
180 | cur_op = op; | |
181 | break; | |
182 | } | |
183 | ||
184 | /* | |
185 | * At this point we either have a valid op and can continue or have not | |
186 | * found an op and must ask the client to try again later. | |
187 | */ | |
188 | if (!cur_op) { | |
8bb8aefd | 189 | spin_unlock(&orangefs_request_list_lock); |
24c8d080 | 190 | return -EAGAIN; |
5db11c21 MM |
191 | } |
192 | ||
24c8d080 MB |
193 | gossip_debug(GOSSIP_DEV_DEBUG, "orangefs: reading op tag %llu %s\n", |
194 | llu(cur_op->tag), get_opname_string(cur_op)); | |
5db11c21 | 195 | |
24c8d080 MB |
196 | /* |
197 | * Such an op should never be on the list in the first place. If so, we | |
198 | * will abort. | |
199 | */ | |
200 | if (op_state_in_progress(cur_op) || op_state_serviced(cur_op)) { | |
201 | gossip_err("orangefs: ERROR: Current op already queued.\n"); | |
202 | list_del(&cur_op->list); | |
5db11c21 | 203 | spin_unlock(&cur_op->lock); |
8bb8aefd | 204 | spin_unlock(&orangefs_request_list_lock); |
24c8d080 | 205 | return -EAGAIN; |
5db11c21 | 206 | } |
ed42fe05 AV |
207 | list_del_init(&cur_op->list); |
208 | get_op(op); | |
8bb8aefd | 209 | spin_unlock(&orangefs_request_list_lock); |
ed42fe05 | 210 | |
24c8d080 MB |
211 | spin_unlock(&cur_op->lock); |
212 | ||
213 | /* Push the upcall out. */ | |
214 | ret = copy_to_user(buf, &proto_ver, sizeof(__s32)); | |
215 | if (ret != 0) | |
216 | goto error; | |
217 | ret = copy_to_user(buf+sizeof(__s32), &magic, sizeof(__s32)); | |
218 | if (ret != 0) | |
219 | goto error; | |
220 | ret = copy_to_user(buf+2 * sizeof(__s32), &cur_op->tag, sizeof(__u64)); | |
221 | if (ret != 0) | |
222 | goto error; | |
223 | ret = copy_to_user(buf+2*sizeof(__s32)+sizeof(__u64), &cur_op->upcall, | |
8bb8aefd | 224 | sizeof(struct orangefs_upcall_s)); |
24c8d080 MB |
225 | if (ret != 0) |
226 | goto error; | |
227 | ||
ed42fe05 AV |
228 | spin_lock(&htable_ops_in_progress_lock); |
229 | spin_lock(&cur_op->lock); | |
230 | if (unlikely(op_state_given_up(cur_op))) { | |
231 | spin_unlock(&cur_op->lock); | |
232 | spin_unlock(&htable_ops_in_progress_lock); | |
233 | op_release(cur_op); | |
234 | goto restart; | |
235 | } | |
236 | ||
237 | /* | |
238 | * Set the operation to be in progress and move it between lists since | |
239 | * it has been sent to the client. | |
240 | */ | |
241 | set_op_state_inprogress(cur_op); | |
242 | orangefs_devreq_add_op(cur_op); | |
243 | spin_unlock(&cur_op->lock); | |
244 | spin_unlock(&htable_ops_in_progress_lock); | |
245 | op_release(cur_op); | |
246 | ||
24c8d080 | 247 | /* The client only asks to read one size buffer. */ |
a762ae6d | 248 | return MAX_DEV_REQ_UPSIZE; |
24c8d080 MB |
249 | error: |
250 | /* | |
251 | * We were unable to copy the op data to the client. Put the op back in | |
252 | * list. If client has crashed, the op will be purged later when the | |
253 | * device is released. | |
254 | */ | |
255 | gossip_err("orangefs: Failed to copy data to user space\n"); | |
8bb8aefd | 256 | spin_lock(&orangefs_request_list_lock); |
24c8d080 | 257 | spin_lock(&cur_op->lock); |
ed42fe05 AV |
258 | if (likely(!op_state_given_up(cur_op))) { |
259 | set_op_state_waiting(cur_op); | |
260 | list_add(&cur_op->list, &orangefs_request_list); | |
261 | } | |
24c8d080 | 262 | spin_unlock(&cur_op->lock); |
8bb8aefd | 263 | spin_unlock(&orangefs_request_list_lock); |
ed42fe05 | 264 | op_release(cur_op); |
24c8d080 | 265 | return -EFAULT; |
5db11c21 MM |
266 | } |
267 | ||
97f10027 | 268 | /* |
b3ae4755 MM |
269 | * Function for writev() callers into the device. |
270 | * | |
271 | * Userspace should have written: | |
272 | * - __u32 version | |
273 | * - __u32 magic | |
274 | * - __u64 tag | |
275 | * - struct orangefs_downcall_s | |
276 | * - trailer buffer (in the case of READDIR operations) | |
97f10027 | 277 | */ |
b3ae4755 MM |
278 | static ssize_t orangefs_devreq_write_iter(struct kiocb *iocb, |
279 | struct iov_iter *iter) | |
5db11c21 | 280 | { |
b3ae4755 | 281 | ssize_t ret; |
8bb8aefd | 282 | struct orangefs_kernel_op_s *op = NULL; |
b3ae4755 MM |
283 | struct { |
284 | __u32 version; | |
285 | __u32 magic; | |
286 | __u64 tag; | |
287 | } head; | |
288 | int total = ret = iov_iter_count(iter); | |
289 | int n; | |
290 | int downcall_size = sizeof(struct orangefs_downcall_s); | |
291 | int head_size = sizeof(head); | |
292 | ||
293 | gossip_debug(GOSSIP_DEV_DEBUG, "%s: total:%d: ret:%zd:\n", | |
294 | __func__, | |
295 | total, | |
296 | ret); | |
5db11c21 | 297 | |
b3ae4755 | 298 | if (total < MAX_DEV_REQ_DOWNSIZE) { |
cf0c2771 | 299 | gossip_err("%s: total:%d: must be at least:%u:\n", |
b3ae4755 MM |
300 | __func__, |
301 | total, | |
cf0c2771 | 302 | (unsigned int) MAX_DEV_REQ_DOWNSIZE); |
ed42fe05 | 303 | return -EFAULT; |
5db11c21 | 304 | } |
b3ae4755 MM |
305 | |
306 | n = copy_from_iter(&head, head_size, iter); | |
307 | if (n < head_size) { | |
308 | gossip_err("%s: failed to copy head.\n", __func__); | |
ed42fe05 | 309 | return -EFAULT; |
97f10027 | 310 | } |
b3ae4755 MM |
311 | |
312 | if (head.version < ORANGEFS_MINIMUM_USERSPACE_VERSION) { | |
313 | gossip_err("%s: userspace claims version" | |
314 | "%d, minimum version required: %d.\n", | |
315 | __func__, | |
316 | head.version, | |
317 | ORANGEFS_MINIMUM_USERSPACE_VERSION); | |
ed42fe05 | 318 | return -EPROTO; |
5db11c21 | 319 | } |
5db11c21 | 320 | |
b3ae4755 MM |
321 | if (head.magic != ORANGEFS_DEVREQ_MAGIC) { |
322 | gossip_err("Error: Device magic number does not match.\n"); | |
ed42fe05 | 323 | return -EPROTO; |
b3ae4755 | 324 | } |
5db11c21 | 325 | |
b3ae4755 MM |
326 | op = orangefs_devreq_remove_op(head.tag); |
327 | if (!op) { | |
328 | gossip_err("WARNING: No one's waiting for tag %llu\n", | |
329 | llu(head.tag)); | |
ed42fe05 | 330 | return ret; |
b3ae4755 | 331 | } |
5db11c21 | 332 | |
b3ae4755 MM |
333 | n = copy_from_iter(&op->downcall, downcall_size, iter); |
334 | if (n != downcall_size) { | |
335 | gossip_err("%s: failed to copy downcall.\n", __func__); | |
5964c1b8 | 336 | goto Efault; |
5db11c21 MM |
337 | } |
338 | ||
b3ae4755 MM |
339 | if (op->downcall.status) |
340 | goto wakeup; | |
97f10027 | 341 | |
b3ae4755 MM |
342 | /* |
343 | * We've successfully peeled off the head and the downcall. | |
344 | * Something has gone awry if total doesn't equal the | |
345 | * sum of head_size, downcall_size and trailer_size. | |
346 | */ | |
347 | if ((head_size + downcall_size + op->downcall.trailer_size) != total) { | |
348 | gossip_err("%s: funky write, head_size:%d" | |
349 | ": downcall_size:%d: trailer_size:%lld" | |
350 | ": total size:%d:\n", | |
351 | __func__, | |
352 | head_size, | |
353 | downcall_size, | |
354 | op->downcall.trailer_size, | |
355 | total); | |
5964c1b8 | 356 | goto Efault; |
b3ae4755 | 357 | } |
97f10027 | 358 | |
b3ae4755 MM |
359 | /* Only READDIR operations should have trailers. */ |
360 | if ((op->downcall.type != ORANGEFS_VFS_OP_READDIR) && | |
361 | (op->downcall.trailer_size != 0)) { | |
362 | gossip_err("%s: %x operation with trailer.", | |
363 | __func__, | |
364 | op->downcall.type); | |
5964c1b8 | 365 | goto Efault; |
b3ae4755 | 366 | } |
97f10027 | 367 | |
b3ae4755 MM |
368 | /* READDIR operations should always have trailers. */ |
369 | if ((op->downcall.type == ORANGEFS_VFS_OP_READDIR) && | |
370 | (op->downcall.trailer_size == 0)) { | |
371 | gossip_err("%s: %x operation with no trailer.", | |
372 | __func__, | |
373 | op->downcall.type); | |
5964c1b8 | 374 | goto Efault; |
b3ae4755 | 375 | } |
97f10027 | 376 | |
b3ae4755 MM |
377 | if (op->downcall.type != ORANGEFS_VFS_OP_READDIR) |
378 | goto wakeup; | |
5db11c21 | 379 | |
b3ae4755 MM |
380 | op->downcall.trailer_buf = |
381 | vmalloc(op->downcall.trailer_size); | |
382 | if (op->downcall.trailer_buf == NULL) { | |
383 | gossip_err("%s: failed trailer vmalloc.\n", | |
384 | __func__); | |
5964c1b8 | 385 | goto Enomem; |
b3ae4755 MM |
386 | } |
387 | memset(op->downcall.trailer_buf, 0, op->downcall.trailer_size); | |
388 | n = copy_from_iter(op->downcall.trailer_buf, | |
389 | op->downcall.trailer_size, | |
390 | iter); | |
391 | if (n != op->downcall.trailer_size) { | |
392 | gossip_err("%s: failed to copy trailer.\n", __func__); | |
393 | vfree(op->downcall.trailer_buf); | |
5964c1b8 | 394 | goto Efault; |
b3ae4755 | 395 | } |
97f10027 | 396 | |
b3ae4755 | 397 | wakeup: |
2a9e5c22 AV |
398 | /* |
399 | * tell the vfs op waiting on a waitqueue | |
400 | * that this op is done | |
401 | */ | |
402 | spin_lock(&op->lock); | |
5964c1b8 | 403 | if (unlikely(op_is_cancel(op))) { |
2a9e5c22 | 404 | spin_unlock(&op->lock); |
78699e29 | 405 | put_cancel(op); |
5964c1b8 AV |
406 | } else if (unlikely(op_state_given_up(op))) { |
407 | spin_unlock(&op->lock); | |
408 | } else { | |
409 | set_op_state_serviced(op); | |
410 | spin_unlock(&op->lock); | |
411 | } | |
ed42fe05 | 412 | op_release(op); |
b3ae4755 | 413 | return ret; |
ed42fe05 | 414 | |
5964c1b8 AV |
415 | Efault: |
416 | op->downcall.status = -(ORANGEFS_ERROR_BIT | 9); | |
417 | ret = -EFAULT; | |
418 | goto wakeup; | |
419 | ||
420 | Enomem: | |
421 | op->downcall.status = -(ORANGEFS_ERROR_BIT | 8); | |
422 | ret = -ENOMEM; | |
423 | goto wakeup; | |
5db11c21 MM |
424 | } |
425 | ||
426 | /* Returns whether any FS are still pending remounted */ | |
427 | static int mark_all_pending_mounts(void) | |
428 | { | |
429 | int unmounted = 1; | |
8bb8aefd | 430 | struct orangefs_sb_info_s *orangefs_sb = NULL; |
5db11c21 | 431 | |
8bb8aefd YL |
432 | spin_lock(&orangefs_superblocks_lock); |
433 | list_for_each_entry(orangefs_sb, &orangefs_superblocks, list) { | |
5db11c21 | 434 | /* All of these file system require a remount */ |
8bb8aefd | 435 | orangefs_sb->mount_pending = 1; |
5db11c21 MM |
436 | unmounted = 0; |
437 | } | |
8bb8aefd | 438 | spin_unlock(&orangefs_superblocks_lock); |
5db11c21 MM |
439 | return unmounted; |
440 | } | |
441 | ||
442 | /* | |
443 | * Determine if a given file system needs to be remounted or not | |
444 | * Returns -1 on error | |
445 | * 0 if already mounted | |
446 | * 1 if needs remount | |
447 | */ | |
448 | int fs_mount_pending(__s32 fsid) | |
449 | { | |
450 | int mount_pending = -1; | |
8bb8aefd | 451 | struct orangefs_sb_info_s *orangefs_sb = NULL; |
5db11c21 | 452 | |
8bb8aefd YL |
453 | spin_lock(&orangefs_superblocks_lock); |
454 | list_for_each_entry(orangefs_sb, &orangefs_superblocks, list) { | |
455 | if (orangefs_sb->fs_id == fsid) { | |
456 | mount_pending = orangefs_sb->mount_pending; | |
5db11c21 MM |
457 | break; |
458 | } | |
459 | } | |
8bb8aefd | 460 | spin_unlock(&orangefs_superblocks_lock); |
5db11c21 MM |
461 | return mount_pending; |
462 | } | |
463 | ||
464 | /* | |
465 | * NOTE: gets called when the last reference to this device is dropped. | |
466 | * Using the open_access_count variable, we enforce a reference count | |
467 | * on this file so that it can be opened by only one process at a time. | |
468 | * the devreq_mutex is used to make sure all i/o has completed | |
8bb8aefd | 469 | * before we call orangefs_bufmap_finalize, and similar such tricky |
5db11c21 MM |
470 | * situations |
471 | */ | |
8bb8aefd | 472 | static int orangefs_devreq_release(struct inode *inode, struct file *file) |
5db11c21 MM |
473 | { |
474 | int unmounted = 0; | |
475 | ||
476 | gossip_debug(GOSSIP_DEV_DEBUG, | |
477 | "%s:pvfs2-client-core: exiting, closing device\n", | |
478 | __func__); | |
479 | ||
480 | mutex_lock(&devreq_mutex); | |
ea2c9c9f | 481 | orangefs_bufmap_finalize(); |
5db11c21 | 482 | |
fee25ce1 | 483 | open_access_count = -1; |
5db11c21 MM |
484 | |
485 | unmounted = mark_all_pending_mounts(); | |
8bb8aefd | 486 | gossip_debug(GOSSIP_DEV_DEBUG, "ORANGEFS Device Close: Filesystem(s) %s\n", |
5db11c21 | 487 | (unmounted ? "UNMOUNTED" : "MOUNTED")); |
5db11c21 MM |
488 | |
489 | /* | |
490 | * Walk through the list of ops in the request list, mark them | |
491 | * as purged and wake them up. | |
492 | */ | |
493 | purge_waiting_ops(); | |
494 | /* | |
495 | * Walk through the hash table of in progress operations; mark | |
496 | * them as purged and wake them up | |
497 | */ | |
498 | purge_inprogress_ops(); | |
ea2c9c9f AV |
499 | |
500 | orangefs_bufmap_run_down(); | |
501 | ||
5db11c21 MM |
502 | gossip_debug(GOSSIP_DEV_DEBUG, |
503 | "pvfs2-client-core: device close complete\n"); | |
fee25ce1 AV |
504 | open_access_count = 0; |
505 | mutex_unlock(&devreq_mutex); | |
5db11c21 MM |
506 | return 0; |
507 | } | |
508 | ||
509 | int is_daemon_in_service(void) | |
510 | { | |
511 | int in_service; | |
512 | ||
513 | /* | |
514 | * What this function does is checks if client-core is alive | |
515 | * based on the access count we maintain on the device. | |
516 | */ | |
517 | mutex_lock(&devreq_mutex); | |
518 | in_service = open_access_count == 1 ? 0 : -EIO; | |
519 | mutex_unlock(&devreq_mutex); | |
520 | return in_service; | |
521 | } | |
522 | ||
78699e29 AV |
523 | bool __is_daemon_in_service(void) |
524 | { | |
525 | return open_access_count == 1; | |
526 | } | |
527 | ||
5db11c21 MM |
528 | static inline long check_ioctl_command(unsigned int command) |
529 | { | |
530 | /* Check for valid ioctl codes */ | |
8bb8aefd | 531 | if (_IOC_TYPE(command) != ORANGEFS_DEV_MAGIC) { |
5db11c21 MM |
532 | gossip_err("device ioctl magic numbers don't match! Did you rebuild pvfs2-client-core/libpvfs2? [cmd %x, magic %x != %x]\n", |
533 | command, | |
534 | _IOC_TYPE(command), | |
8bb8aefd | 535 | ORANGEFS_DEV_MAGIC); |
5db11c21 MM |
536 | return -EINVAL; |
537 | } | |
538 | /* and valid ioctl commands */ | |
8bb8aefd | 539 | if (_IOC_NR(command) >= ORANGEFS_DEV_MAXNR || _IOC_NR(command) <= 0) { |
5db11c21 | 540 | gossip_err("Invalid ioctl command number [%d >= %d]\n", |
8bb8aefd | 541 | _IOC_NR(command), ORANGEFS_DEV_MAXNR); |
5db11c21 MM |
542 | return -ENOIOCTLCMD; |
543 | } | |
544 | return 0; | |
545 | } | |
546 | ||
547 | static long dispatch_ioctl_command(unsigned int command, unsigned long arg) | |
548 | { | |
8bb8aefd | 549 | static __s32 magic = ORANGEFS_DEVREQ_MAGIC; |
a762ae6d MB |
550 | static __s32 max_up_size = MAX_DEV_REQ_UPSIZE; |
551 | static __s32 max_down_size = MAX_DEV_REQ_DOWNSIZE; | |
8bb8aefd | 552 | struct ORANGEFS_dev_map_desc user_desc; |
5db11c21 MM |
553 | int ret = 0; |
554 | struct dev_mask_info_s mask_info = { 0 }; | |
555 | struct dev_mask2_info_s mask2_info = { 0, 0 }; | |
556 | int upstream_kmod = 1; | |
557 | struct list_head *tmp = NULL; | |
8bb8aefd | 558 | struct orangefs_sb_info_s *orangefs_sb = NULL; |
5db11c21 MM |
559 | |
560 | /* mtmoore: add locking here */ | |
561 | ||
562 | switch (command) { | |
8bb8aefd | 563 | case ORANGEFS_DEV_GET_MAGIC: |
5db11c21 MM |
564 | return ((put_user(magic, (__s32 __user *) arg) == -EFAULT) ? |
565 | -EIO : | |
566 | 0); | |
8bb8aefd | 567 | case ORANGEFS_DEV_GET_MAX_UPSIZE: |
5db11c21 MM |
568 | return ((put_user(max_up_size, |
569 | (__s32 __user *) arg) == -EFAULT) ? | |
570 | -EIO : | |
571 | 0); | |
8bb8aefd | 572 | case ORANGEFS_DEV_GET_MAX_DOWNSIZE: |
5db11c21 MM |
573 | return ((put_user(max_down_size, |
574 | (__s32 __user *) arg) == -EFAULT) ? | |
575 | -EIO : | |
576 | 0); | |
8bb8aefd | 577 | case ORANGEFS_DEV_MAP: |
5db11c21 | 578 | ret = copy_from_user(&user_desc, |
8bb8aefd | 579 | (struct ORANGEFS_dev_map_desc __user *) |
5db11c21 | 580 | arg, |
8bb8aefd | 581 | sizeof(struct ORANGEFS_dev_map_desc)); |
ea2c9c9f AV |
582 | /* WTF -EIO and not -EFAULT? */ |
583 | return ret ? -EIO : orangefs_bufmap_initialize(&user_desc); | |
8bb8aefd | 584 | case ORANGEFS_DEV_REMOUNT_ALL: |
5db11c21 | 585 | gossip_debug(GOSSIP_DEV_DEBUG, |
97f10027 MM |
586 | "%s: got ORANGEFS_DEV_REMOUNT_ALL\n", |
587 | __func__); | |
5db11c21 MM |
588 | |
589 | /* | |
8bb8aefd | 590 | * remount all mounted orangefs volumes to regain the lost |
5db11c21 MM |
591 | * dynamic mount tables (if any) -- NOTE: this is done |
592 | * without keeping the superblock list locked due to the | |
593 | * upcall/downcall waiting. also, the request semaphore is | |
594 | * used to ensure that no operations will be serviced until | |
595 | * all of the remounts are serviced (to avoid ops between | |
596 | * mounts to fail) | |
597 | */ | |
598 | ret = mutex_lock_interruptible(&request_mutex); | |
599 | if (ret < 0) | |
600 | return ret; | |
601 | gossip_debug(GOSSIP_DEV_DEBUG, | |
97f10027 MM |
602 | "%s: priority remount in progress\n", |
603 | __func__); | |
8bb8aefd YL |
604 | list_for_each(tmp, &orangefs_superblocks) { |
605 | orangefs_sb = | |
97f10027 MM |
606 | list_entry(tmp, |
607 | struct orangefs_sb_info_s, | |
608 | list); | |
8bb8aefd | 609 | if (orangefs_sb && (orangefs_sb->sb)) { |
5db11c21 | 610 | gossip_debug(GOSSIP_DEV_DEBUG, |
97f10027 MM |
611 | "%s: Remounting SB %p\n", |
612 | __func__, | |
8bb8aefd | 613 | orangefs_sb); |
5db11c21 | 614 | |
8bb8aefd | 615 | ret = orangefs_remount(orangefs_sb->sb); |
5db11c21 MM |
616 | if (ret) { |
617 | gossip_debug(GOSSIP_DEV_DEBUG, | |
618 | "SB %p remount failed\n", | |
8bb8aefd | 619 | orangefs_sb); |
97f10027 | 620 | break; |
5db11c21 MM |
621 | } |
622 | } | |
623 | } | |
624 | gossip_debug(GOSSIP_DEV_DEBUG, | |
97f10027 MM |
625 | "%s: priority remount complete\n", |
626 | __func__); | |
5db11c21 MM |
627 | mutex_unlock(&request_mutex); |
628 | return ret; | |
629 | ||
8bb8aefd | 630 | case ORANGEFS_DEV_UPSTREAM: |
5db11c21 MM |
631 | ret = copy_to_user((void __user *)arg, |
632 | &upstream_kmod, | |
633 | sizeof(upstream_kmod)); | |
634 | ||
635 | if (ret != 0) | |
636 | return -EIO; | |
637 | else | |
638 | return ret; | |
639 | ||
8bb8aefd | 640 | case ORANGEFS_DEV_CLIENT_MASK: |
5db11c21 MM |
641 | ret = copy_from_user(&mask2_info, |
642 | (void __user *)arg, | |
643 | sizeof(struct dev_mask2_info_s)); | |
644 | ||
645 | if (ret != 0) | |
646 | return -EIO; | |
647 | ||
648 | client_debug_mask.mask1 = mask2_info.mask1_value; | |
649 | client_debug_mask.mask2 = mask2_info.mask2_value; | |
650 | ||
651 | pr_info("%s: client debug mask has been been received " | |
652 | ":%llx: :%llx:\n", | |
653 | __func__, | |
654 | (unsigned long long)client_debug_mask.mask1, | |
655 | (unsigned long long)client_debug_mask.mask2); | |
656 | ||
657 | return ret; | |
658 | ||
8bb8aefd | 659 | case ORANGEFS_DEV_CLIENT_STRING: |
5db11c21 MM |
660 | ret = copy_from_user(&client_debug_array_string, |
661 | (void __user *)arg, | |
8bb8aefd | 662 | ORANGEFS_MAX_DEBUG_STRING_LEN); |
5db11c21 | 663 | if (ret != 0) { |
97f10027 | 664 | pr_info("%s: CLIENT_STRING: copy_from_user failed\n", |
5db11c21 MM |
665 | __func__); |
666 | return -EIO; | |
667 | } | |
668 | ||
97f10027 | 669 | pr_info("%s: client debug array string has been received.\n", |
5db11c21 MM |
670 | __func__); |
671 | ||
672 | if (!help_string_initialized) { | |
673 | ||
674 | /* Free the "we don't know yet" default string... */ | |
675 | kfree(debug_help_string); | |
676 | ||
677 | /* build a proper debug help string */ | |
678 | if (orangefs_prepare_debugfs_help_string(0)) { | |
97f10027 | 679 | gossip_err("%s: no debug help string \n", |
5db11c21 MM |
680 | __func__); |
681 | return -EIO; | |
682 | } | |
683 | ||
684 | /* Replace the boilerplate boot-time debug-help file. */ | |
685 | debugfs_remove(help_file_dentry); | |
686 | ||
687 | help_file_dentry = | |
688 | debugfs_create_file( | |
689 | ORANGEFS_KMOD_DEBUG_HELP_FILE, | |
690 | 0444, | |
691 | debug_dir, | |
692 | debug_help_string, | |
693 | &debug_help_fops); | |
694 | ||
695 | if (!help_file_dentry) { | |
696 | gossip_err("%s: debugfs_create_file failed for" | |
697 | " :%s:!\n", | |
698 | __func__, | |
699 | ORANGEFS_KMOD_DEBUG_HELP_FILE); | |
700 | return -EIO; | |
701 | } | |
702 | } | |
703 | ||
704 | debug_mask_to_string(&client_debug_mask, 1); | |
705 | ||
706 | debugfs_remove(client_debug_dentry); | |
707 | ||
8bb8aefd | 708 | orangefs_client_debug_init(); |
5db11c21 MM |
709 | |
710 | help_string_initialized++; | |
711 | ||
712 | return ret; | |
713 | ||
8bb8aefd | 714 | case ORANGEFS_DEV_DEBUG: |
5db11c21 MM |
715 | ret = copy_from_user(&mask_info, |
716 | (void __user *)arg, | |
717 | sizeof(mask_info)); | |
718 | ||
719 | if (ret != 0) | |
720 | return -EIO; | |
721 | ||
722 | if (mask_info.mask_type == KERNEL_MASK) { | |
723 | if ((mask_info.mask_value == 0) | |
724 | && (kernel_mask_set_mod_init)) { | |
725 | /* | |
726 | * the kernel debug mask was set when the | |
727 | * kernel module was loaded; don't override | |
728 | * it if the client-core was started without | |
8bb8aefd | 729 | * a value for ORANGEFS_KMODMASK. |
5db11c21 MM |
730 | */ |
731 | return 0; | |
732 | } | |
733 | debug_mask_to_string(&mask_info.mask_value, | |
734 | mask_info.mask_type); | |
735 | gossip_debug_mask = mask_info.mask_value; | |
97f10027 | 736 | pr_info("%s: kernel debug mask has been modified to " |
5db11c21 | 737 | ":%s: :%llx:\n", |
97f10027 | 738 | __func__, |
5db11c21 MM |
739 | kernel_debug_string, |
740 | (unsigned long long)gossip_debug_mask); | |
741 | } else if (mask_info.mask_type == CLIENT_MASK) { | |
742 | debug_mask_to_string(&mask_info.mask_value, | |
743 | mask_info.mask_type); | |
97f10027 | 744 | pr_info("%s: client debug mask has been modified to" |
5db11c21 | 745 | ":%s: :%llx:\n", |
97f10027 | 746 | __func__, |
5db11c21 MM |
747 | client_debug_string, |
748 | llu(mask_info.mask_value)); | |
749 | } else { | |
750 | gossip_lerr("Invalid mask type....\n"); | |
751 | return -EINVAL; | |
752 | } | |
753 | ||
754 | return ret; | |
755 | ||
756 | default: | |
757 | return -ENOIOCTLCMD; | |
758 | } | |
759 | return -ENOIOCTLCMD; | |
760 | } | |
761 | ||
8bb8aefd | 762 | static long orangefs_devreq_ioctl(struct file *file, |
5db11c21 MM |
763 | unsigned int command, unsigned long arg) |
764 | { | |
765 | long ret; | |
766 | ||
767 | /* Check for properly constructed commands */ | |
768 | ret = check_ioctl_command(command); | |
769 | if (ret < 0) | |
770 | return (int)ret; | |
771 | ||
772 | return (int)dispatch_ioctl_command(command, arg); | |
773 | } | |
774 | ||
775 | #ifdef CONFIG_COMPAT /* CONFIG_COMPAT is in .config */ | |
776 | ||
8bb8aefd YL |
777 | /* Compat structure for the ORANGEFS_DEV_MAP ioctl */ |
778 | struct ORANGEFS_dev_map_desc32 { | |
5db11c21 MM |
779 | compat_uptr_t ptr; |
780 | __s32 total_size; | |
781 | __s32 size; | |
782 | __s32 count; | |
783 | }; | |
784 | ||
785 | static unsigned long translate_dev_map26(unsigned long args, long *error) | |
786 | { | |
8bb8aefd | 787 | struct ORANGEFS_dev_map_desc32 __user *p32 = (void __user *)args; |
5db11c21 MM |
788 | /* |
789 | * Depending on the architecture, allocate some space on the | |
790 | * user-call-stack based on our expected layout. | |
791 | */ | |
8bb8aefd | 792 | struct ORANGEFS_dev_map_desc __user *p = |
5db11c21 | 793 | compat_alloc_user_space(sizeof(*p)); |
84d02150 | 794 | compat_uptr_t addr; |
5db11c21 MM |
795 | |
796 | *error = 0; | |
797 | /* get the ptr from the 32 bit user-space */ | |
798 | if (get_user(addr, &p32->ptr)) | |
799 | goto err; | |
800 | /* try to put that into a 64-bit layout */ | |
801 | if (put_user(compat_ptr(addr), &p->ptr)) | |
802 | goto err; | |
803 | /* copy the remaining fields */ | |
804 | if (copy_in_user(&p->total_size, &p32->total_size, sizeof(__s32))) | |
805 | goto err; | |
806 | if (copy_in_user(&p->size, &p32->size, sizeof(__s32))) | |
807 | goto err; | |
808 | if (copy_in_user(&p->count, &p32->count, sizeof(__s32))) | |
809 | goto err; | |
810 | return (unsigned long)p; | |
811 | err: | |
812 | *error = -EFAULT; | |
813 | return 0; | |
814 | } | |
815 | ||
816 | /* | |
817 | * 32 bit user-space apps' ioctl handlers when kernel modules | |
818 | * is compiled as a 64 bit one | |
819 | */ | |
8bb8aefd | 820 | static long orangefs_devreq_compat_ioctl(struct file *filp, unsigned int cmd, |
5db11c21 MM |
821 | unsigned long args) |
822 | { | |
823 | long ret; | |
824 | unsigned long arg = args; | |
825 | ||
826 | /* Check for properly constructed commands */ | |
827 | ret = check_ioctl_command(cmd); | |
828 | if (ret < 0) | |
829 | return ret; | |
8bb8aefd | 830 | if (cmd == ORANGEFS_DEV_MAP) { |
5db11c21 MM |
831 | /* |
832 | * convert the arguments to what we expect internally | |
833 | * in kernel space | |
834 | */ | |
835 | arg = translate_dev_map26(args, &ret); | |
836 | if (ret < 0) { | |
837 | gossip_err("Could not translate dev map\n"); | |
838 | return ret; | |
839 | } | |
840 | } | |
841 | /* no other ioctl requires translation */ | |
842 | return dispatch_ioctl_command(cmd, arg); | |
843 | } | |
844 | ||
2c590d5f MM |
845 | #endif /* CONFIG_COMPAT is in .config */ |
846 | ||
5db11c21 | 847 | /* the assigned character device major number */ |
8bb8aefd | 848 | static int orangefs_dev_major; |
5db11c21 MM |
849 | |
850 | /* | |
8bb8aefd | 851 | * Initialize orangefs device specific state: |
5db11c21 MM |
852 | * Must be called at module load time only |
853 | */ | |
8bb8aefd | 854 | int orangefs_dev_init(void) |
5db11c21 | 855 | { |
8bb8aefd YL |
856 | /* register orangefs-req device */ |
857 | orangefs_dev_major = register_chrdev(0, | |
858 | ORANGEFS_REQDEVICE_NAME, | |
859 | &orangefs_devreq_file_operations); | |
860 | if (orangefs_dev_major < 0) { | |
5db11c21 MM |
861 | gossip_debug(GOSSIP_DEV_DEBUG, |
862 | "Failed to register /dev/%s (error %d)\n", | |
8bb8aefd | 863 | ORANGEFS_REQDEVICE_NAME, orangefs_dev_major); |
8bb8aefd | 864 | return orangefs_dev_major; |
5db11c21 MM |
865 | } |
866 | ||
867 | gossip_debug(GOSSIP_DEV_DEBUG, | |
868 | "*** /dev/%s character device registered ***\n", | |
8bb8aefd | 869 | ORANGEFS_REQDEVICE_NAME); |
5db11c21 | 870 | gossip_debug(GOSSIP_DEV_DEBUG, "'mknod /dev/%s c %d 0'.\n", |
8bb8aefd | 871 | ORANGEFS_REQDEVICE_NAME, orangefs_dev_major); |
5db11c21 MM |
872 | return 0; |
873 | } | |
874 | ||
8bb8aefd | 875 | void orangefs_dev_cleanup(void) |
5db11c21 | 876 | { |
8bb8aefd | 877 | unregister_chrdev(orangefs_dev_major, ORANGEFS_REQDEVICE_NAME); |
5db11c21 MM |
878 | gossip_debug(GOSSIP_DEV_DEBUG, |
879 | "*** /dev/%s character device unregistered ***\n", | |
8bb8aefd | 880 | ORANGEFS_REQDEVICE_NAME); |
5db11c21 MM |
881 | } |
882 | ||
8bb8aefd | 883 | static unsigned int orangefs_devreq_poll(struct file *file, |
5db11c21 MM |
884 | struct poll_table_struct *poll_table) |
885 | { | |
886 | int poll_revent_mask = 0; | |
887 | ||
83595db0 | 888 | poll_wait(file, &orangefs_request_list_waitq, poll_table); |
5db11c21 | 889 | |
83595db0 AV |
890 | if (!list_empty(&orangefs_request_list)) |
891 | poll_revent_mask |= POLL_IN; | |
5db11c21 MM |
892 | return poll_revent_mask; |
893 | } | |
894 | ||
8bb8aefd | 895 | const struct file_operations orangefs_devreq_file_operations = { |
5db11c21 | 896 | .owner = THIS_MODULE, |
8bb8aefd YL |
897 | .read = orangefs_devreq_read, |
898 | .write_iter = orangefs_devreq_write_iter, | |
899 | .open = orangefs_devreq_open, | |
900 | .release = orangefs_devreq_release, | |
901 | .unlocked_ioctl = orangefs_devreq_ioctl, | |
5db11c21 MM |
902 | |
903 | #ifdef CONFIG_COMPAT /* CONFIG_COMPAT is in .config */ | |
8bb8aefd | 904 | .compat_ioctl = orangefs_devreq_compat_ioctl, |
5db11c21 | 905 | #endif |
8bb8aefd | 906 | .poll = orangefs_devreq_poll |
5db11c21 | 907 | }; |