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-rw-r--r--fs/exofs/ios.c421
1 files changed, 421 insertions, 0 deletions
diff --git a/fs/exofs/ios.c b/fs/exofs/ios.c
new file mode 100644
index 000000000000..5bad01fa1f9f
--- /dev/null
+++ b/fs/exofs/ios.c
@@ -0,0 +1,421 @@
1/*
2 * Copyright (C) 2005, 2006
3 * Avishay Traeger (avishay@gmail.com)
4 * Copyright (C) 2008, 2009
5 * Boaz Harrosh <bharrosh@panasas.com>
6 *
7 * This file is part of exofs.
8 *
9 * exofs is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation. Since it is based on ext2, and the only
12 * valid version of GPL for the Linux kernel is version 2, the only valid
13 * version of GPL for exofs is version 2.
14 *
15 * exofs is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with exofs; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25#include <scsi/scsi_device.h>
26
27#include "exofs.h"
28
29void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj)
30{
31 osd_sec_init_nosec_doall_caps(cred_a, obj, false, true);
32}
33
34int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj,
35 u64 offset, void *p, unsigned length)
36{
37 struct osd_request *or = osd_start_request(od, GFP_KERNEL);
38/* struct osd_sense_info osi = {.key = 0};*/
39 int ret;
40
41 if (unlikely(!or)) {
42 EXOFS_DBGMSG("%s: osd_start_request failed.\n", __func__);
43 return -ENOMEM;
44 }
45 ret = osd_req_read_kern(or, obj, offset, p, length);
46 if (unlikely(ret)) {
47 EXOFS_DBGMSG("%s: osd_req_read_kern failed.\n", __func__);
48 goto out;
49 }
50
51 ret = osd_finalize_request(or, 0, cred, NULL);
52 if (unlikely(ret)) {
53 EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret);
54 goto out;
55 }
56
57 ret = osd_execute_request(or);
58 if (unlikely(ret))
59 EXOFS_DBGMSG("osd_execute_request() => %d\n", ret);
60 /* osd_req_decode_sense(or, ret); */
61
62out:
63 osd_end_request(or);
64 return ret;
65}
66
67int exofs_get_io_state(struct exofs_sb_info *sbi, struct exofs_io_state** pios)
68{
69 struct exofs_io_state *ios;
70
71 /*TODO: Maybe use kmem_cach per sbi of size
72 * exofs_io_state_size(sbi->s_numdevs)
73 */
74 ios = kzalloc(exofs_io_state_size(sbi->s_numdevs), GFP_KERNEL);
75 if (unlikely(!ios)) {
76 *pios = NULL;
77 return -ENOMEM;
78 }
79
80 ios->sbi = sbi;
81 ios->obj.partition = sbi->s_pid;
82 *pios = ios;
83 return 0;
84}
85
86void exofs_put_io_state(struct exofs_io_state *ios)
87{
88 if (ios) {
89 unsigned i;
90
91 for (i = 0; i < ios->numdevs; i++) {
92 struct exofs_per_dev_state *per_dev = &ios->per_dev[i];
93
94 if (per_dev->or)
95 osd_end_request(per_dev->or);
96 if (per_dev->bio)
97 bio_put(per_dev->bio);
98 }
99
100 kfree(ios);
101 }
102}
103
104static void _sync_done(struct exofs_io_state *ios, void *p)
105{
106 struct completion *waiting = p;
107
108 complete(waiting);
109}
110
111static void _last_io(struct kref *kref)
112{
113 struct exofs_io_state *ios = container_of(
114 kref, struct exofs_io_state, kref);
115
116 ios->done(ios, ios->private);
117}
118
119static void _done_io(struct osd_request *or, void *p)
120{
121 struct exofs_io_state *ios = p;
122
123 kref_put(&ios->kref, _last_io);
124}
125
126static int exofs_io_execute(struct exofs_io_state *ios)
127{
128 DECLARE_COMPLETION_ONSTACK(wait);
129 bool sync = (ios->done == NULL);
130 int i, ret;
131
132 if (sync) {
133 ios->done = _sync_done;
134 ios->private = &wait;
135 }
136
137 for (i = 0; i < ios->numdevs; i++) {
138 struct osd_request *or = ios->per_dev[i].or;
139 if (unlikely(!or))
140 continue;
141
142 ret = osd_finalize_request(or, 0, ios->cred, NULL);
143 if (unlikely(ret)) {
144 EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n",
145 ret);
146 return ret;
147 }
148 }
149
150 kref_init(&ios->kref);
151
152 for (i = 0; i < ios->numdevs; i++) {
153 struct osd_request *or = ios->per_dev[i].or;
154 if (unlikely(!or))
155 continue;
156
157 kref_get(&ios->kref);
158 osd_execute_request_async(or, _done_io, ios);
159 }
160
161 kref_put(&ios->kref, _last_io);
162 ret = 0;
163
164 if (sync) {
165 wait_for_completion(&wait);
166 ret = exofs_check_io(ios, NULL);
167 }
168 return ret;
169}
170
171int exofs_check_io(struct exofs_io_state *ios, u64 *resid)
172{
173 enum osd_err_priority acumulated_osd_err = 0;
174 int acumulated_lin_err = 0;
175 int i;
176
177 for (i = 0; i < ios->numdevs; i++) {
178 struct osd_sense_info osi;
179 int ret = osd_req_decode_sense(ios->per_dev[i].or, &osi);
180
181 if (likely(!ret))
182 continue;
183
184 if (unlikely(ret == -EFAULT)) {
185 EXOFS_DBGMSG("%s: EFAULT Need page clear\n", __func__);
186 /*FIXME: All the pages in this device range should:
187 * clear_highpage(page);
188 */
189 }
190
191 if (osi.osd_err_pri >= acumulated_osd_err) {
192 acumulated_osd_err = osi.osd_err_pri;
193 acumulated_lin_err = ret;
194 }
195 }
196
197 /* TODO: raid specific residual calculations */
198 if (resid) {
199 if (likely(!acumulated_lin_err))
200 *resid = 0;
201 else
202 *resid = ios->length;
203 }
204
205 return acumulated_lin_err;
206}
207
208int exofs_sbi_create(struct exofs_io_state *ios)
209{
210 int i, ret;
211
212 for (i = 0; i < ios->sbi->s_numdevs; i++) {
213 struct osd_request *or;
214
215 or = osd_start_request(ios->sbi->s_ods[i], GFP_KERNEL);
216 if (unlikely(!or)) {
217 EXOFS_ERR("%s: osd_start_request failed\n", __func__);
218 ret = -ENOMEM;
219 goto out;
220 }
221 ios->per_dev[i].or = or;
222 ios->numdevs++;
223
224 osd_req_create_object(or, &ios->obj);
225 }
226 ret = exofs_io_execute(ios);
227
228out:
229 return ret;
230}
231
232int exofs_sbi_remove(struct exofs_io_state *ios)
233{
234 int i, ret;
235
236 for (i = 0; i < ios->sbi->s_numdevs; i++) {
237 struct osd_request *or;
238
239 or = osd_start_request(ios->sbi->s_ods[i], GFP_KERNEL);
240 if (unlikely(!or)) {
241 EXOFS_ERR("%s: osd_start_request failed\n", __func__);
242 ret = -ENOMEM;
243 goto out;
244 }
245 ios->per_dev[i].or = or;
246 ios->numdevs++;
247
248 osd_req_remove_object(or, &ios->obj);
249 }
250 ret = exofs_io_execute(ios);
251
252out:
253 return ret;
254}
255
256int exofs_sbi_write(struct exofs_io_state *ios)
257{
258 int i, ret;
259
260 for (i = 0; i < ios->sbi->s_numdevs; i++) {
261 struct osd_request *or;
262
263 or = osd_start_request(ios->sbi->s_ods[i], GFP_KERNEL);
264 if (unlikely(!or)) {
265 EXOFS_ERR("%s: osd_start_request failed\n", __func__);
266 ret = -ENOMEM;
267 goto out;
268 }
269 ios->per_dev[i].or = or;
270 ios->numdevs++;
271
272 if (ios->bio) {
273 struct bio *bio;
274
275 if (i != 0) {
276 bio = bio_kmalloc(GFP_KERNEL,
277 ios->bio->bi_max_vecs);
278 if (unlikely(!bio)) {
279 ret = -ENOMEM;
280 goto out;
281 }
282
283 __bio_clone(bio, ios->bio);
284 bio->bi_bdev = NULL;
285 bio->bi_next = NULL;
286 ios->per_dev[i].bio = bio;
287 } else {
288 bio = ios->bio;
289 }
290
291 osd_req_write(or, &ios->obj, ios->offset, bio,
292 ios->length);
293/* EXOFS_DBGMSG("write sync=%d\n", sync);*/
294 } else if (ios->kern_buff) {
295 osd_req_write_kern(or, &ios->obj, ios->offset,
296 ios->kern_buff, ios->length);
297/* EXOFS_DBGMSG("write_kern sync=%d\n", sync);*/
298 } else {
299 osd_req_set_attributes(or, &ios->obj);
300/* EXOFS_DBGMSG("set_attributes sync=%d\n", sync);*/
301 }
302
303 if (ios->out_attr)
304 osd_req_add_set_attr_list(or, ios->out_attr,
305 ios->out_attr_len);
306
307 if (ios->in_attr)
308 osd_req_add_get_attr_list(or, ios->in_attr,
309 ios->in_attr_len);
310 }
311 ret = exofs_io_execute(ios);
312
313out:
314 return ret;
315}
316
317int exofs_sbi_read(struct exofs_io_state *ios)
318{
319 int i, ret;
320
321 for (i = 0; i < 1; i++) {
322 struct osd_request *or;
323 unsigned first_dev = (unsigned)ios->obj.id;
324
325 first_dev %= ios->sbi->s_numdevs;
326 or = osd_start_request(ios->sbi->s_ods[first_dev], GFP_KERNEL);
327 if (unlikely(!or)) {
328 EXOFS_ERR("%s: osd_start_request failed\n", __func__);
329 ret = -ENOMEM;
330 goto out;
331 }
332 ios->per_dev[i].or = or;
333 ios->numdevs++;
334
335 if (ios->bio) {
336 osd_req_read(or, &ios->obj, ios->offset, ios->bio,
337 ios->length);
338/* EXOFS_DBGMSG("read sync=%d\n", sync);*/
339 } else if (ios->kern_buff) {
340 osd_req_read_kern(or, &ios->obj, ios->offset,
341 ios->kern_buff, ios->length);
342/* EXOFS_DBGMSG("read_kern sync=%d\n", sync);*/
343 } else {
344 osd_req_get_attributes(or, &ios->obj);
345/* EXOFS_DBGMSG("get_attributes sync=%d\n", sync);*/
346 }
347
348 if (ios->out_attr)
349 osd_req_add_set_attr_list(or, ios->out_attr,
350 ios->out_attr_len);
351
352 if (ios->in_attr)
353 osd_req_add_get_attr_list(or, ios->in_attr,
354 ios->in_attr_len);
355 }
356 ret = exofs_io_execute(ios);
357
358out:
359 return ret;
360}
361
362int extract_attr_from_ios(struct exofs_io_state *ios, struct osd_attr *attr)
363{
364 struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */
365 void *iter = NULL;
366 int nelem;
367
368 do {
369 nelem = 1;
370 osd_req_decode_get_attr_list(ios->per_dev[0].or,
371 &cur_attr, &nelem, &iter);
372 if ((cur_attr.attr_page == attr->attr_page) &&
373 (cur_attr.attr_id == attr->attr_id)) {
374 attr->len = cur_attr.len;
375 attr->val_ptr = cur_attr.val_ptr;
376 return 0;
377 }
378 } while (iter);
379
380 return -EIO;
381}
382
383int exofs_oi_truncate(struct exofs_i_info *oi, u64 size)
384{
385 struct exofs_sb_info *sbi = oi->vfs_inode.i_sb->s_fs_info;
386 struct exofs_io_state *ios;
387 struct osd_attr attr;
388 __be64 newsize;
389 int i, ret;
390
391 if (exofs_get_io_state(sbi, &ios))
392 return -ENOMEM;
393
394 ios->obj.id = exofs_oi_objno(oi);
395 ios->cred = oi->i_cred;
396
397 newsize = cpu_to_be64(size);
398 attr = g_attr_logical_length;
399 attr.val_ptr = &newsize;
400
401 for (i = 0; i < sbi->s_numdevs; i++) {
402 struct osd_request *or;
403
404 or = osd_start_request(sbi->s_ods[i], GFP_KERNEL);
405 if (unlikely(!or)) {
406 EXOFS_ERR("%s: osd_start_request failed\n", __func__);
407 ret = -ENOMEM;
408 goto out;
409 }
410 ios->per_dev[i].or = or;
411 ios->numdevs++;
412
413 osd_req_set_attributes(or, &ios->obj);
414 osd_req_add_set_attr_list(or, &attr, 1);
415 }
416 ret = exofs_io_execute(ios);
417
418out:
419 exofs_put_io_state(ios);
420 return ret;
421}
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-07 16:17:09 -0500