Commit | Line | Data |
---|---|---|
3e9b4a5e | 1 | /* |
759d5768 | 2 | * Copyright (c) 2006 QLogic, Inc. All rights reserved. |
3e9b4a5e BS |
3 | * Copyright (c) 2006 PathScale, Inc. All rights reserved. |
4 | * | |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | */ | |
33 | ||
34 | #include <linux/version.h> | |
3e9b4a5e BS |
35 | #include <linux/module.h> |
36 | #include <linux/fs.h> | |
37 | #include <linux/mount.h> | |
38 | #include <linux/pagemap.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/namei.h> | |
3e9b4a5e BS |
41 | |
42 | #include "ipath_kernel.h" | |
43 | ||
44 | #define IPATHFS_MAGIC 0x726a77 | |
45 | ||
46 | static struct super_block *ipath_super; | |
47 | ||
48 | static int ipathfs_mknod(struct inode *dir, struct dentry *dentry, | |
2b8693c0 | 49 | int mode, const struct file_operations *fops, |
3e9b4a5e BS |
50 | void *data) |
51 | { | |
52 | int error; | |
53 | struct inode *inode = new_inode(dir->i_sb); | |
54 | ||
55 | if (!inode) { | |
56 | error = -EPERM; | |
57 | goto bail; | |
58 | } | |
59 | ||
60 | inode->i_mode = mode; | |
61 | inode->i_uid = 0; | |
62 | inode->i_gid = 0; | |
3e9b4a5e BS |
63 | inode->i_blocks = 0; |
64 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
8e18e294 | 65 | inode->i_private = data; |
3e9b4a5e BS |
66 | if ((mode & S_IFMT) == S_IFDIR) { |
67 | inode->i_op = &simple_dir_inode_operations; | |
d8c76e6f DH |
68 | inc_nlink(inode); |
69 | inc_nlink(dir); | |
3e9b4a5e BS |
70 | } |
71 | ||
72 | inode->i_fop = fops; | |
73 | ||
74 | d_instantiate(dentry, inode); | |
75 | error = 0; | |
76 | ||
77 | bail: | |
78 | return error; | |
79 | } | |
80 | ||
81 | static int create_file(const char *name, mode_t mode, | |
82 | struct dentry *parent, struct dentry **dentry, | |
2b8693c0 | 83 | const struct file_operations *fops, void *data) |
3e9b4a5e BS |
84 | { |
85 | int error; | |
86 | ||
87 | *dentry = NULL; | |
88 | mutex_lock(&parent->d_inode->i_mutex); | |
89 | *dentry = lookup_one_len(name, parent, strlen(name)); | |
90 | if (!IS_ERR(dentry)) | |
91 | error = ipathfs_mknod(parent->d_inode, *dentry, | |
92 | mode, fops, data); | |
93 | else | |
94 | error = PTR_ERR(dentry); | |
95 | mutex_unlock(&parent->d_inode->i_mutex); | |
96 | ||
97 | return error; | |
98 | } | |
99 | ||
100 | static ssize_t atomic_stats_read(struct file *file, char __user *buf, | |
101 | size_t count, loff_t *ppos) | |
102 | { | |
103 | return simple_read_from_buffer(buf, count, ppos, &ipath_stats, | |
104 | sizeof ipath_stats); | |
105 | } | |
106 | ||
2b8693c0 | 107 | static const struct file_operations atomic_stats_ops = { |
3e9b4a5e BS |
108 | .read = atomic_stats_read, |
109 | }; | |
110 | ||
111 | #define NUM_COUNTERS sizeof(struct infinipath_counters) / sizeof(u64) | |
112 | ||
113 | static ssize_t atomic_counters_read(struct file *file, char __user *buf, | |
114 | size_t count, loff_t *ppos) | |
115 | { | |
116 | u64 counters[NUM_COUNTERS]; | |
117 | u16 i; | |
118 | struct ipath_devdata *dd; | |
119 | ||
1cfd6e64 | 120 | dd = file->f_path.dentry->d_inode->i_private; |
3e9b4a5e BS |
121 | |
122 | for (i = 0; i < NUM_COUNTERS; i++) | |
123 | counters[i] = ipath_snap_cntr(dd, i); | |
124 | ||
125 | return simple_read_from_buffer(buf, count, ppos, counters, | |
126 | sizeof counters); | |
127 | } | |
128 | ||
2b8693c0 | 129 | static const struct file_operations atomic_counters_ops = { |
3e9b4a5e BS |
130 | .read = atomic_counters_read, |
131 | }; | |
132 | ||
133 | static ssize_t atomic_node_info_read(struct file *file, char __user *buf, | |
134 | size_t count, loff_t *ppos) | |
135 | { | |
136 | u32 nodeinfo[10]; | |
137 | struct ipath_devdata *dd; | |
138 | u64 guid; | |
139 | ||
1cfd6e64 | 140 | dd = file->f_path.dentry->d_inode->i_private; |
3e9b4a5e BS |
141 | |
142 | guid = be64_to_cpu(dd->ipath_guid); | |
143 | ||
144 | nodeinfo[0] = /* BaseVersion is SMA */ | |
145 | /* ClassVersion is SMA */ | |
146 | (1 << 8) /* NodeType */ | |
147 | | (1 << 0); /* NumPorts */ | |
148 | nodeinfo[1] = (u32) (guid >> 32); | |
149 | nodeinfo[2] = (u32) (guid & 0xffffffff); | |
150 | /* PortGUID == SystemImageGUID for us */ | |
151 | nodeinfo[3] = nodeinfo[1]; | |
152 | /* PortGUID == SystemImageGUID for us */ | |
153 | nodeinfo[4] = nodeinfo[2]; | |
154 | /* PortGUID == NodeGUID for us */ | |
155 | nodeinfo[5] = nodeinfo[3]; | |
156 | /* PortGUID == NodeGUID for us */ | |
157 | nodeinfo[6] = nodeinfo[4]; | |
158 | nodeinfo[7] = (4 << 16) /* we support 4 pkeys */ | |
159 | | (dd->ipath_deviceid << 0); | |
160 | /* our chip version as 16 bits major, 16 bits minor */ | |
161 | nodeinfo[8] = dd->ipath_minrev | (dd->ipath_majrev << 16); | |
162 | nodeinfo[9] = (dd->ipath_unit << 24) | (dd->ipath_vendorid << 0); | |
163 | ||
164 | return simple_read_from_buffer(buf, count, ppos, nodeinfo, | |
165 | sizeof nodeinfo); | |
166 | } | |
167 | ||
2b8693c0 | 168 | static const struct file_operations atomic_node_info_ops = { |
3e9b4a5e BS |
169 | .read = atomic_node_info_read, |
170 | }; | |
171 | ||
172 | static ssize_t atomic_port_info_read(struct file *file, char __user *buf, | |
173 | size_t count, loff_t *ppos) | |
174 | { | |
175 | u32 portinfo[13]; | |
176 | u32 tmp, tmp2; | |
177 | struct ipath_devdata *dd; | |
178 | ||
1cfd6e64 | 179 | dd = file->f_path.dentry->d_inode->i_private; |
3e9b4a5e BS |
180 | |
181 | /* so we only initialize non-zero fields. */ | |
182 | memset(portinfo, 0, sizeof portinfo); | |
183 | ||
184 | /* | |
185 | * Notimpl yet M_Key (64) | |
186 | * Notimpl yet GID (64) | |
187 | */ | |
188 | ||
189 | portinfo[4] = (dd->ipath_lid << 16); | |
190 | ||
191 | /* | |
0fd41363 BS |
192 | * Notimpl yet SMLID. |
193 | * CapabilityMask is 0, we don't support any of these | |
3e9b4a5e BS |
194 | * DiagCode is 0; we don't store any diag info for now Notimpl yet |
195 | * M_KeyLeasePeriod (we don't support M_Key) | |
196 | */ | |
197 | ||
198 | /* LocalPortNum is whichever port number they ask for */ | |
199 | portinfo[7] = (dd->ipath_unit << 24) | |
200 | /* LinkWidthEnabled */ | |
201 | | (2 << 16) | |
202 | /* LinkWidthSupported (really 2, but not IB valid) */ | |
203 | | (3 << 8) | |
204 | /* LinkWidthActive */ | |
205 | | (2 << 0); | |
206 | tmp = dd->ipath_lastibcstat & IPATH_IBSTATE_MASK; | |
207 | tmp2 = 5; | |
208 | if (tmp == IPATH_IBSTATE_INIT) | |
209 | tmp = 2; | |
210 | else if (tmp == IPATH_IBSTATE_ARM) | |
211 | tmp = 3; | |
212 | else if (tmp == IPATH_IBSTATE_ACTIVE) | |
213 | tmp = 4; | |
214 | else { | |
215 | tmp = 0; /* down */ | |
216 | tmp2 = tmp & 0xf; | |
217 | } | |
218 | ||
219 | portinfo[8] = (1 << 28) /* LinkSpeedSupported */ | |
220 | | (tmp << 24) /* PortState */ | |
221 | | (tmp2 << 20) /* PortPhysicalState */ | |
222 | | (2 << 16) | |
223 | ||
224 | /* LinkDownDefaultState */ | |
225 | /* M_KeyProtectBits == 0 */ | |
226 | /* NotImpl yet LMC == 0 (we can support all values) */ | |
227 | | (1 << 4) /* LinkSpeedActive */ | |
228 | | (1 << 0); /* LinkSpeedEnabled */ | |
229 | switch (dd->ipath_ibmtu) { | |
230 | case 4096: | |
231 | tmp = 5; | |
232 | break; | |
233 | case 2048: | |
234 | tmp = 4; | |
235 | break; | |
236 | case 1024: | |
237 | tmp = 3; | |
238 | break; | |
239 | case 512: | |
240 | tmp = 2; | |
241 | break; | |
242 | case 256: | |
243 | tmp = 1; | |
244 | break; | |
245 | default: /* oops, something is wrong */ | |
246 | ipath_dbg("Problem, ipath_ibmtu 0x%x not a valid IB MTU, " | |
247 | "treat as 2048\n", dd->ipath_ibmtu); | |
248 | tmp = 4; | |
249 | break; | |
250 | } | |
251 | portinfo[9] = (tmp << 28) | |
252 | /* NeighborMTU */ | |
253 | /* Notimpl MasterSMSL */ | |
254 | | (1 << 20) | |
255 | ||
256 | /* VLCap */ | |
257 | /* Notimpl InitType (actually, an SMA decision) */ | |
258 | /* VLHighLimit is 0 (only one VL) */ | |
259 | ; /* VLArbitrationHighCap is 0 (only one VL) */ | |
260 | portinfo[10] = /* VLArbitrationLowCap is 0 (only one VL) */ | |
261 | /* InitTypeReply is SMA decision */ | |
262 | (5 << 16) /* MTUCap 4096 */ | |
263 | | (7 << 13) /* VLStallCount */ | |
264 | | (0x1f << 8) /* HOQLife */ | |
265 | | (1 << 4) | |
266 | ||
267 | /* OperationalVLs 0 */ | |
268 | /* PartitionEnforcementInbound */ | |
269 | /* PartitionEnforcementOutbound not enforced */ | |
270 | /* FilterRawinbound not enforced */ | |
271 | ; /* FilterRawOutbound not enforced */ | |
272 | /* M_KeyViolations are not counted by hardware, SMA can count */ | |
273 | tmp = ipath_read_creg32(dd, dd->ipath_cregs->cr_errpkey); | |
274 | /* P_KeyViolations are counted by hardware. */ | |
275 | portinfo[11] = ((tmp & 0xffff) << 0); | |
276 | portinfo[12] = | |
277 | /* Q_KeyViolations are not counted by hardware */ | |
278 | (1 << 8) | |
279 | ||
280 | /* GUIDCap */ | |
281 | /* SubnetTimeOut handled by SMA */ | |
282 | /* RespTimeValue handled by SMA */ | |
283 | ; | |
284 | /* LocalPhyErrors are programmed to max */ | |
285 | portinfo[12] |= (0xf << 20) | |
286 | | (0xf << 16) /* OverRunErrors are programmed to max */ | |
287 | ; | |
288 | ||
289 | return simple_read_from_buffer(buf, count, ppos, portinfo, | |
290 | sizeof portinfo); | |
291 | } | |
292 | ||
2b8693c0 | 293 | static const struct file_operations atomic_port_info_ops = { |
3e9b4a5e BS |
294 | .read = atomic_port_info_read, |
295 | }; | |
296 | ||
297 | static ssize_t flash_read(struct file *file, char __user *buf, | |
298 | size_t count, loff_t *ppos) | |
299 | { | |
300 | struct ipath_devdata *dd; | |
301 | ssize_t ret; | |
302 | loff_t pos; | |
303 | char *tmp; | |
304 | ||
305 | pos = *ppos; | |
306 | ||
307 | if ( pos < 0) { | |
308 | ret = -EINVAL; | |
309 | goto bail; | |
310 | } | |
311 | ||
312 | if (pos >= sizeof(struct ipath_flash)) { | |
313 | ret = 0; | |
314 | goto bail; | |
315 | } | |
316 | ||
317 | if (count > sizeof(struct ipath_flash) - pos) | |
318 | count = sizeof(struct ipath_flash) - pos; | |
319 | ||
320 | tmp = kmalloc(count, GFP_KERNEL); | |
321 | if (!tmp) { | |
322 | ret = -ENOMEM; | |
323 | goto bail; | |
324 | } | |
325 | ||
1cfd6e64 | 326 | dd = file->f_path.dentry->d_inode->i_private; |
3e9b4a5e BS |
327 | if (ipath_eeprom_read(dd, pos, tmp, count)) { |
328 | ipath_dev_err(dd, "failed to read from flash\n"); | |
329 | ret = -ENXIO; | |
330 | goto bail_tmp; | |
331 | } | |
332 | ||
333 | if (copy_to_user(buf, tmp, count)) { | |
334 | ret = -EFAULT; | |
335 | goto bail_tmp; | |
336 | } | |
337 | ||
338 | *ppos = pos + count; | |
339 | ret = count; | |
340 | ||
341 | bail_tmp: | |
342 | kfree(tmp); | |
343 | ||
344 | bail: | |
345 | return ret; | |
346 | } | |
347 | ||
348 | static ssize_t flash_write(struct file *file, const char __user *buf, | |
349 | size_t count, loff_t *ppos) | |
350 | { | |
351 | struct ipath_devdata *dd; | |
352 | ssize_t ret; | |
353 | loff_t pos; | |
354 | char *tmp; | |
355 | ||
356 | pos = *ppos; | |
357 | ||
7dae5bff | 358 | if (pos != 0) { |
3e9b4a5e BS |
359 | ret = -EINVAL; |
360 | goto bail; | |
361 | } | |
362 | ||
7dae5bff BS |
363 | if (count != sizeof(struct ipath_flash)) { |
364 | ret = -EINVAL; | |
3e9b4a5e BS |
365 | goto bail; |
366 | } | |
367 | ||
3e9b4a5e BS |
368 | tmp = kmalloc(count, GFP_KERNEL); |
369 | if (!tmp) { | |
370 | ret = -ENOMEM; | |
371 | goto bail; | |
372 | } | |
373 | ||
374 | if (copy_from_user(tmp, buf, count)) { | |
375 | ret = -EFAULT; | |
376 | goto bail_tmp; | |
377 | } | |
378 | ||
1cfd6e64 | 379 | dd = file->f_path.dentry->d_inode->i_private; |
3e9b4a5e BS |
380 | if (ipath_eeprom_write(dd, pos, tmp, count)) { |
381 | ret = -ENXIO; | |
382 | ipath_dev_err(dd, "failed to write to flash\n"); | |
383 | goto bail_tmp; | |
384 | } | |
385 | ||
386 | *ppos = pos + count; | |
387 | ret = count; | |
388 | ||
389 | bail_tmp: | |
390 | kfree(tmp); | |
391 | ||
392 | bail: | |
393 | return ret; | |
394 | } | |
395 | ||
2b8693c0 | 396 | static const struct file_operations flash_ops = { |
3e9b4a5e BS |
397 | .read = flash_read, |
398 | .write = flash_write, | |
399 | }; | |
400 | ||
401 | static int create_device_files(struct super_block *sb, | |
402 | struct ipath_devdata *dd) | |
403 | { | |
404 | struct dentry *dir, *tmp; | |
405 | char unit[10]; | |
406 | int ret; | |
407 | ||
408 | snprintf(unit, sizeof unit, "%02d", dd->ipath_unit); | |
409 | ret = create_file(unit, S_IFDIR|S_IRUGO|S_IXUGO, sb->s_root, &dir, | |
410 | (struct file_operations *) &simple_dir_operations, | |
411 | dd); | |
412 | if (ret) { | |
413 | printk(KERN_ERR "create_file(%s) failed: %d\n", unit, ret); | |
414 | goto bail; | |
415 | } | |
416 | ||
417 | ret = create_file("atomic_counters", S_IFREG|S_IRUGO, dir, &tmp, | |
418 | &atomic_counters_ops, dd); | |
419 | if (ret) { | |
420 | printk(KERN_ERR "create_file(%s/atomic_counters) " | |
421 | "failed: %d\n", unit, ret); | |
422 | goto bail; | |
423 | } | |
424 | ||
425 | ret = create_file("node_info", S_IFREG|S_IRUGO, dir, &tmp, | |
426 | &atomic_node_info_ops, dd); | |
427 | if (ret) { | |
428 | printk(KERN_ERR "create_file(%s/node_info) " | |
429 | "failed: %d\n", unit, ret); | |
430 | goto bail; | |
431 | } | |
432 | ||
433 | ret = create_file("port_info", S_IFREG|S_IRUGO, dir, &tmp, | |
434 | &atomic_port_info_ops, dd); | |
435 | if (ret) { | |
436 | printk(KERN_ERR "create_file(%s/port_info) " | |
437 | "failed: %d\n", unit, ret); | |
438 | goto bail; | |
439 | } | |
440 | ||
441 | ret = create_file("flash", S_IFREG|S_IWUSR|S_IRUGO, dir, &tmp, | |
442 | &flash_ops, dd); | |
443 | if (ret) { | |
444 | printk(KERN_ERR "create_file(%s/flash) " | |
445 | "failed: %d\n", unit, ret); | |
446 | goto bail; | |
447 | } | |
448 | ||
449 | bail: | |
450 | return ret; | |
451 | } | |
452 | ||
fae8773b | 453 | static int remove_file(struct dentry *parent, char *name) |
3e9b4a5e BS |
454 | { |
455 | struct dentry *tmp; | |
fae8773b | 456 | int ret; |
3e9b4a5e BS |
457 | |
458 | tmp = lookup_one_len(name, parent, strlen(name)); | |
459 | ||
fae8773b BS |
460 | if (IS_ERR(tmp)) { |
461 | ret = PTR_ERR(tmp); | |
462 | goto bail; | |
463 | } | |
464 | ||
3e9b4a5e BS |
465 | spin_lock(&dcache_lock); |
466 | spin_lock(&tmp->d_lock); | |
467 | if (!(d_unhashed(tmp) && tmp->d_inode)) { | |
468 | dget_locked(tmp); | |
469 | __d_drop(tmp); | |
470 | spin_unlock(&tmp->d_lock); | |
471 | spin_unlock(&dcache_lock); | |
472 | simple_unlink(parent->d_inode, tmp); | |
473 | } else { | |
474 | spin_unlock(&tmp->d_lock); | |
475 | spin_unlock(&dcache_lock); | |
476 | } | |
fae8773b BS |
477 | |
478 | ret = 0; | |
479 | bail: | |
480 | /* | |
481 | * We don't expect clients to care about the return value, but | |
482 | * it's there if they need it. | |
483 | */ | |
484 | return ret; | |
3e9b4a5e BS |
485 | } |
486 | ||
487 | static int remove_device_files(struct super_block *sb, | |
488 | struct ipath_devdata *dd) | |
489 | { | |
490 | struct dentry *dir, *root; | |
491 | char unit[10]; | |
492 | int ret; | |
493 | ||
494 | root = dget(sb->s_root); | |
495 | mutex_lock(&root->d_inode->i_mutex); | |
496 | snprintf(unit, sizeof unit, "%02d", dd->ipath_unit); | |
497 | dir = lookup_one_len(unit, root, strlen(unit)); | |
498 | ||
499 | if (IS_ERR(dir)) { | |
500 | ret = PTR_ERR(dir); | |
501 | printk(KERN_ERR "Lookup of %s failed\n", unit); | |
502 | goto bail; | |
503 | } | |
504 | ||
505 | remove_file(dir, "flash"); | |
506 | remove_file(dir, "port_info"); | |
507 | remove_file(dir, "node_info"); | |
508 | remove_file(dir, "atomic_counters"); | |
509 | d_delete(dir); | |
510 | ret = simple_rmdir(root->d_inode, dir); | |
511 | ||
512 | bail: | |
513 | mutex_unlock(&root->d_inode->i_mutex); | |
514 | dput(root); | |
515 | return ret; | |
516 | } | |
517 | ||
518 | static int ipathfs_fill_super(struct super_block *sb, void *data, | |
519 | int silent) | |
520 | { | |
521 | struct ipath_devdata *dd, *tmp; | |
522 | unsigned long flags; | |
523 | int ret; | |
524 | ||
525 | static struct tree_descr files[] = { | |
1a1c9bb4 | 526 | [2] = {"atomic_stats", &atomic_stats_ops, S_IRUGO}, |
3e9b4a5e BS |
527 | {""}, |
528 | }; | |
529 | ||
530 | ret = simple_fill_super(sb, IPATHFS_MAGIC, files); | |
531 | if (ret) { | |
532 | printk(KERN_ERR "simple_fill_super failed: %d\n", ret); | |
533 | goto bail; | |
534 | } | |
535 | ||
536 | spin_lock_irqsave(&ipath_devs_lock, flags); | |
537 | ||
538 | list_for_each_entry_safe(dd, tmp, &ipath_dev_list, ipath_list) { | |
539 | spin_unlock_irqrestore(&ipath_devs_lock, flags); | |
540 | ret = create_device_files(sb, dd); | |
541 | if (ret) { | |
542 | deactivate_super(sb); | |
543 | goto bail; | |
544 | } | |
545 | spin_lock_irqsave(&ipath_devs_lock, flags); | |
546 | } | |
547 | ||
548 | spin_unlock_irqrestore(&ipath_devs_lock, flags); | |
549 | ||
550 | bail: | |
551 | return ret; | |
552 | } | |
553 | ||
454e2398 DH |
554 | static int ipathfs_get_sb(struct file_system_type *fs_type, int flags, |
555 | const char *dev_name, void *data, struct vfsmount *mnt) | |
3e9b4a5e | 556 | { |
454e2398 DH |
557 | int ret = get_sb_single(fs_type, flags, data, |
558 | ipathfs_fill_super, mnt); | |
559 | if (ret >= 0) | |
560 | ipath_super = mnt->mnt_sb; | |
561 | return ret; | |
3e9b4a5e BS |
562 | } |
563 | ||
564 | static void ipathfs_kill_super(struct super_block *s) | |
565 | { | |
566 | kill_litter_super(s); | |
567 | ipath_super = NULL; | |
568 | } | |
569 | ||
570 | int ipathfs_add_device(struct ipath_devdata *dd) | |
571 | { | |
572 | int ret; | |
573 | ||
574 | if (ipath_super == NULL) { | |
575 | ret = 0; | |
576 | goto bail; | |
577 | } | |
578 | ||
579 | ret = create_device_files(ipath_super, dd); | |
580 | ||
581 | bail: | |
582 | return ret; | |
583 | } | |
584 | ||
585 | int ipathfs_remove_device(struct ipath_devdata *dd) | |
586 | { | |
587 | int ret; | |
588 | ||
589 | if (ipath_super == NULL) { | |
590 | ret = 0; | |
591 | goto bail; | |
592 | } | |
593 | ||
594 | ret = remove_device_files(ipath_super, dd); | |
595 | ||
596 | bail: | |
597 | return ret; | |
598 | } | |
599 | ||
600 | static struct file_system_type ipathfs_fs_type = { | |
601 | .owner = THIS_MODULE, | |
602 | .name = "ipathfs", | |
603 | .get_sb = ipathfs_get_sb, | |
604 | .kill_sb = ipathfs_kill_super, | |
605 | }; | |
606 | ||
607 | int __init ipath_init_ipathfs(void) | |
608 | { | |
609 | return register_filesystem(&ipathfs_fs_type); | |
610 | } | |
611 | ||
612 | void __exit ipath_exit_ipathfs(void) | |
613 | { | |
614 | unregister_filesystem(&ipathfs_fs_type); | |
615 | } |