blob: 7e02d33b5e5c035fdc68d6ab48419fe272767295 [file] [log] [blame]
Boaz Harroshb14f8ab2008-10-27 18:27:55 +02001/*
2 * Copyright (C) 2005, 2006
Boaz Harrosh27d2e142009-06-14 17:23:09 +03003 * Avishay Traeger (avishay@gmail.com)
Boaz Harroshb14f8ab2008-10-27 18:27:55 +02004 * 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
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/slab.h>
Boaz Harrosh5d952b82010-02-01 13:35:51 +020026#include <asm/div64.h>
Boaz Harroshb14f8ab2008-10-27 18:27:55 +020027
Boaz Harrosh8ff660a2011-08-06 19:26:31 -070028#include <scsi/osd_ore.h>
Boaz Harroshb14f8ab2008-10-27 18:27:55 +020029
Boaz Harrosh8ff660a2011-08-06 19:26:31 -070030#define ORE_ERR(fmt, a...) printk(KERN_ERR "ore: " fmt, ##a)
Boaz Harrosh34ce4e7c2009-12-15 19:34:17 +020031
Boaz Harrosh8ff660a2011-08-06 19:26:31 -070032#ifdef CONFIG_EXOFS_DEBUG
33#define ORE_DBGMSG(fmt, a...) \
34 printk(KERN_NOTICE "ore @%s:%d: " fmt, __func__, __LINE__, ##a)
35#else
36#define ORE_DBGMSG(fmt, a...) \
37 do { if (0) printk(fmt, ##a); } while (0)
38#endif
39
40/* u64 has problems with printk this will cast it to unsigned long long */
41#define _LLU(x) (unsigned long long)(x)
42
43#define ORE_DBGMSG2(M...) do {} while (0)
44/* #define ORE_DBGMSG2 ORE_DBGMSG */
45
Boaz Harroshcf283ad2011-08-06 19:22:06 -070046MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>");
47MODULE_DESCRIPTION("Objects Raid Engine ore.ko");
48MODULE_LICENSE("GPL");
49
Boaz Harroshb916c5c2011-09-28 11:55:51 +030050static void ore_calc_stripe_info(struct ore_layout *layout, u64 file_offset,
51 struct ore_striping_info *si);
52
Boaz Harrosh8ff660a2011-08-06 19:26:31 -070053static u8 *_ios_cred(struct ore_io_state *ios, unsigned index)
Boaz Harrosh9e9db452011-08-05 15:06:04 -070054{
Boaz Harrosh5bf696d2011-09-28 11:39:59 +030055 return ios->oc->comps[index & ios->oc->single_comp].cred;
Boaz Harrosh9e9db452011-08-05 15:06:04 -070056}
57
Boaz Harrosh8ff660a2011-08-06 19:26:31 -070058static struct osd_obj_id *_ios_obj(struct ore_io_state *ios, unsigned index)
Boaz Harrosh9e9db452011-08-05 15:06:04 -070059{
Boaz Harrosh5bf696d2011-09-28 11:39:59 +030060 return &ios->oc->comps[index & ios->oc->single_comp].obj;
Boaz Harrosh9e9db452011-08-05 15:06:04 -070061}
62
Boaz Harrosh8ff660a2011-08-06 19:26:31 -070063static struct osd_dev *_ios_od(struct ore_io_state *ios, unsigned index)
Boaz Harrosh9e9db452011-08-05 15:06:04 -070064{
Boaz Harroshd866d872011-09-28 14:43:09 +030065 return ore_comp_dev(ios->oc, index);
Boaz Harrosh9e9db452011-08-05 15:06:04 -070066}
67
Boaz Harroshb916c5c2011-09-28 11:55:51 +030068static int _get_io_state(struct ore_layout *layout,
69 struct ore_components *oc, unsigned numdevs,
70 struct ore_io_state **pios)
Boaz Harroshb14f8ab2008-10-27 18:27:55 +020071{
Boaz Harrosh8ff660a2011-08-06 19:26:31 -070072 struct ore_io_state *ios;
Boaz Harroshb14f8ab2008-10-27 18:27:55 +020073
Boaz Harrosh06886a52009-11-08 14:54:08 +020074 /*TODO: Maybe use kmem_cach per sbi of size
Boaz Harrosh45d3abc2010-01-28 11:46:16 +020075 * exofs_io_state_size(layout->s_numdevs)
Boaz Harrosh06886a52009-11-08 14:54:08 +020076 */
Boaz Harroshb916c5c2011-09-28 11:55:51 +030077 ios = kzalloc(ore_io_state_size(numdevs), GFP_KERNEL);
Boaz Harrosh06886a52009-11-08 14:54:08 +020078 if (unlikely(!ios)) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -070079 ORE_DBGMSG("Failed kzalloc bytes=%d\n",
Boaz Harroshb916c5c2011-09-28 11:55:51 +030080 ore_io_state_size(numdevs));
Boaz Harrosh06886a52009-11-08 14:54:08 +020081 *pios = NULL;
82 return -ENOMEM;
Boaz Harroshb14f8ab2008-10-27 18:27:55 +020083 }
84
Boaz Harrosh45d3abc2010-01-28 11:46:16 +020085 ios->layout = layout;
Boaz Harrosh5bf696d2011-09-28 11:39:59 +030086 ios->oc = oc;
Boaz Harrosh06886a52009-11-08 14:54:08 +020087 *pios = ios;
88 return 0;
89}
Boaz Harroshb916c5c2011-09-28 11:55:51 +030090
91/* Allocate an io_state for only a single group of devices
92 *
93 * If a user needs to call ore_read/write() this version must be used becase it
94 * allocates extra stuff for striping and raid.
95 * The ore might decide to only IO less then @length bytes do to alignmets
96 * and constrains as follows:
97 * - The IO cannot cross group boundary.
98 * - In raid5/6 The end of the IO must align at end of a stripe eg.
99 * (@offset + @length) % strip_size == 0. Or the complete range is within a
100 * single stripe.
101 * - Memory condition only permitted a shorter IO. (A user can use @length=~0
102 * And check the returned ios->length for max_io_size.)
103 *
104 * The caller must check returned ios->length (and/or ios->nr_pages) and
105 * re-issue these pages that fall outside of ios->length
106 */
107int ore_get_rw_state(struct ore_layout *layout, struct ore_components *oc,
108 bool is_reading, u64 offset, u64 length,
109 struct ore_io_state **pios)
110{
111 struct ore_io_state *ios;
112 unsigned numdevs = layout->group_width * layout->mirrors_p1;
113 int ret;
114
115 ret = _get_io_state(layout, oc, numdevs, pios);
116 if (unlikely(ret))
117 return ret;
118
119 ios = *pios;
120 ios->reading = is_reading;
121 ios->offset = offset;
122
123 if (length) {
Boaz Harrosh98260752011-10-02 15:32:50 +0200124 ore_calc_stripe_info(layout, offset, &ios->si);
125 ios->length = (length <= ios->si.group_length) ? length :
126 ios->si.group_length;
Boaz Harroshb916c5c2011-09-28 11:55:51 +0300127 ios->nr_pages = (ios->length + PAGE_SIZE - 1) / PAGE_SIZE;
128 }
129
130 return 0;
131}
Boaz Harroshcf283ad2011-08-06 19:22:06 -0700132EXPORT_SYMBOL(ore_get_rw_state);
Boaz Harroshb14f8ab2008-10-27 18:27:55 +0200133
Boaz Harroshb916c5c2011-09-28 11:55:51 +0300134/* Allocate an io_state for all the devices in the comps array
135 *
136 * This version of io_state allocation is used mostly by create/remove
137 * and trunc where we currently need all the devices. The only wastful
138 * bit is the read/write_attributes with no IO. Those sites should
139 * be converted to use ore_get_rw_state() with length=0
140 */
Boaz Harrosh5bf696d2011-09-28 11:39:59 +0300141int ore_get_io_state(struct ore_layout *layout, struct ore_components *oc,
Boaz Harroshb916c5c2011-09-28 11:55:51 +0300142 struct ore_io_state **pios)
Boaz Harroshe1042ba2010-11-16 20:09:58 +0200143{
Boaz Harroshb916c5c2011-09-28 11:55:51 +0300144 return _get_io_state(layout, oc, oc->numdevs, pios);
Boaz Harroshe1042ba2010-11-16 20:09:58 +0200145}
Boaz Harroshcf283ad2011-08-06 19:22:06 -0700146EXPORT_SYMBOL(ore_get_io_state);
Boaz Harroshe1042ba2010-11-16 20:09:58 +0200147
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700148void ore_put_io_state(struct ore_io_state *ios)
Boaz Harrosh06886a52009-11-08 14:54:08 +0200149{
150 if (ios) {
151 unsigned i;
152
153 for (i = 0; i < ios->numdevs; i++) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700154 struct ore_per_dev_state *per_dev = &ios->per_dev[i];
Boaz Harrosh06886a52009-11-08 14:54:08 +0200155
156 if (per_dev->or)
157 osd_end_request(per_dev->or);
158 if (per_dev->bio)
159 bio_put(per_dev->bio);
160 }
161
162 kfree(ios);
163 }
164}
Boaz Harroshcf283ad2011-08-06 19:22:06 -0700165EXPORT_SYMBOL(ore_put_io_state);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200166
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700167static void _sync_done(struct ore_io_state *ios, void *p)
Boaz Harrosh06886a52009-11-08 14:54:08 +0200168{
169 struct completion *waiting = p;
170
171 complete(waiting);
172}
173
174static void _last_io(struct kref *kref)
175{
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700176 struct ore_io_state *ios = container_of(
177 kref, struct ore_io_state, kref);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200178
179 ios->done(ios, ios->private);
180}
181
182static void _done_io(struct osd_request *or, void *p)
183{
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700184 struct ore_io_state *ios = p;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200185
186 kref_put(&ios->kref, _last_io);
187}
188
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700189static int ore_io_execute(struct ore_io_state *ios)
Boaz Harrosh06886a52009-11-08 14:54:08 +0200190{
191 DECLARE_COMPLETION_ONSTACK(wait);
192 bool sync = (ios->done == NULL);
193 int i, ret;
194
195 if (sync) {
196 ios->done = _sync_done;
197 ios->private = &wait;
198 }
199
200 for (i = 0; i < ios->numdevs; i++) {
201 struct osd_request *or = ios->per_dev[i].or;
202 if (unlikely(!or))
203 continue;
204
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700205 ret = osd_finalize_request(or, 0, _ios_cred(ios, i), NULL);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200206 if (unlikely(ret)) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700207 ORE_DBGMSG("Failed to osd_finalize_request() => %d\n",
Boaz Harrosh06886a52009-11-08 14:54:08 +0200208 ret);
209 return ret;
210 }
211 }
212
213 kref_init(&ios->kref);
214
215 for (i = 0; i < ios->numdevs; i++) {
216 struct osd_request *or = ios->per_dev[i].or;
217 if (unlikely(!or))
218 continue;
219
220 kref_get(&ios->kref);
221 osd_execute_request_async(or, _done_io, ios);
222 }
223
224 kref_put(&ios->kref, _last_io);
225 ret = 0;
226
227 if (sync) {
228 wait_for_completion(&wait);
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700229 ret = ore_check_io(ios, NULL);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200230 }
Boaz Harroshb14f8ab2008-10-27 18:27:55 +0200231 return ret;
232}
233
Boaz Harrosh22ddc552010-01-19 19:24:45 +0200234static void _clear_bio(struct bio *bio)
235{
236 struct bio_vec *bv;
237 unsigned i;
238
239 __bio_for_each_segment(bv, bio, i, 0) {
240 unsigned this_count = bv->bv_len;
241
242 if (likely(PAGE_SIZE == this_count))
243 clear_highpage(bv->bv_page);
244 else
245 zero_user(bv->bv_page, bv->bv_offset, this_count);
246 }
247}
248
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700249int ore_check_io(struct ore_io_state *ios, u64 *resid)
Boaz Harrosh06886a52009-11-08 14:54:08 +0200250{
251 enum osd_err_priority acumulated_osd_err = 0;
252 int acumulated_lin_err = 0;
253 int i;
254
255 for (i = 0; i < ios->numdevs; i++) {
256 struct osd_sense_info osi;
Boaz Harrosh22ddc552010-01-19 19:24:45 +0200257 struct osd_request *or = ios->per_dev[i].or;
258 int ret;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200259
Boaz Harrosh22ddc552010-01-19 19:24:45 +0200260 if (unlikely(!or))
261 continue;
262
263 ret = osd_req_decode_sense(or, &osi);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200264 if (likely(!ret))
265 continue;
266
Boaz Harrosh22ddc552010-01-19 19:24:45 +0200267 if (OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) {
268 /* start read offset passed endof file */
269 _clear_bio(ios->per_dev[i].bio);
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700270 ORE_DBGMSG("start read offset passed end of file "
Boaz Harrosh22ddc552010-01-19 19:24:45 +0200271 "offset=0x%llx, length=0x%llx\n",
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200272 _LLU(ios->per_dev[i].offset),
273 _LLU(ios->per_dev[i].length));
Boaz Harrosh22ddc552010-01-19 19:24:45 +0200274
275 continue; /* we recovered */
Boaz Harrosh06886a52009-11-08 14:54:08 +0200276 }
277
278 if (osi.osd_err_pri >= acumulated_osd_err) {
279 acumulated_osd_err = osi.osd_err_pri;
280 acumulated_lin_err = ret;
281 }
282 }
283
284 /* TODO: raid specific residual calculations */
285 if (resid) {
286 if (likely(!acumulated_lin_err))
287 *resid = 0;
288 else
289 *resid = ios->length;
290 }
291
292 return acumulated_lin_err;
293}
Boaz Harroshcf283ad2011-08-06 19:22:06 -0700294EXPORT_SYMBOL(ore_check_io);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200295
Boaz Harroshb367e782010-02-07 19:18:58 +0200296/*
297 * L - logical offset into the file
298 *
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200299 * U - The number of bytes in a stripe within a group
Boaz Harroshb367e782010-02-07 19:18:58 +0200300 *
301 * U = stripe_unit * group_width
302 *
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200303 * T - The number of bytes striped within a group of component objects
304 * (before advancing to the next group)
Boaz Harroshb367e782010-02-07 19:18:58 +0200305 *
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200306 * T = stripe_unit * group_width * group_depth
307 *
308 * S - The number of bytes striped across all component objects
309 * before the pattern repeats
310 *
311 * S = stripe_unit * group_width * group_depth * group_count
312 *
313 * M - The "major" (i.e., across all components) stripe number
314 *
315 * M = L / S
316 *
317 * G - Counts the groups from the beginning of the major stripe
318 *
319 * G = (L - (M * S)) / T [or (L % S) / T]
320 *
321 * H - The byte offset within the group
322 *
323 * H = (L - (M * S)) % T [or (L % S) % T]
324 *
325 * N - The "minor" (i.e., across the group) stripe number
326 *
327 * N = H / U
Boaz Harroshb367e782010-02-07 19:18:58 +0200328 *
329 * C - The component index coresponding to L
330 *
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200331 * C = (H - (N * U)) / stripe_unit + G * group_width
332 * [or (L % U) / stripe_unit + G * group_width]
Boaz Harroshb367e782010-02-07 19:18:58 +0200333 *
334 * O - The component offset coresponding to L
335 *
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200336 * O = L % stripe_unit + N * stripe_unit + M * group_depth * stripe_unit
Boaz Harroshb367e782010-02-07 19:18:58 +0200337 */
Boaz Harrosheb507bc2011-08-10 14:17:28 -0700338static void ore_calc_stripe_info(struct ore_layout *layout, u64 file_offset,
339 struct ore_striping_info *si)
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200340{
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700341 u32 stripe_unit = layout->stripe_unit;
342 u32 group_width = layout->group_width;
343 u64 group_depth = layout->group_depth;
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200344
Boaz Harroshb367e782010-02-07 19:18:58 +0200345 u32 U = stripe_unit * group_width;
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200346 u64 T = U * group_depth;
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700347 u64 S = T * layout->group_count;
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200348 u64 M = div64_u64(file_offset, S);
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200349
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200350 /*
351 G = (L - (M * S)) / T
352 H = (L - (M * S)) % T
353 */
354 u64 LmodS = file_offset - M * S;
355 u32 G = div64_u64(LmodS, T);
356 u64 H = LmodS - G * T;
Boaz Harroshb367e782010-02-07 19:18:58 +0200357
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200358 u32 N = div_u64(H, U);
359
360 /* "H - (N * U)" is just "H % U" so it's bound to u32 */
361 si->dev = (u32)(H - (N * U)) / stripe_unit + G * group_width;
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700362 si->dev *= layout->mirrors_p1;
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200363
364 div_u64_rem(file_offset, stripe_unit, &si->unit_off);
365
366 si->obj_offset = si->unit_off + (N * stripe_unit) +
367 (M * group_depth * stripe_unit);
368
369 si->group_length = T - H;
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700370 si->M = M;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200371}
372
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700373static int _add_stripe_unit(struct ore_io_state *ios, unsigned *cur_pg,
374 unsigned pgbase, struct ore_per_dev_state *per_dev,
Boaz Harrosh86093aa2010-01-28 18:24:06 +0200375 int cur_len)
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200376{
Boaz Harrosh86093aa2010-01-28 18:24:06 +0200377 unsigned pg = *cur_pg;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200378 struct request_queue *q =
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700379 osd_request_queue(_ios_od(ios, per_dev->dev));
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200380
381 per_dev->length += cur_len;
382
383 if (per_dev->bio == NULL) {
384 unsigned pages_in_stripe = ios->layout->group_width *
385 (ios->layout->stripe_unit / PAGE_SIZE);
Boaz Harrosh86093aa2010-01-28 18:24:06 +0200386 unsigned bio_size = (ios->nr_pages + pages_in_stripe) /
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200387 ios->layout->group_width;
388
389 per_dev->bio = bio_kmalloc(GFP_KERNEL, bio_size);
390 if (unlikely(!per_dev->bio)) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700391 ORE_DBGMSG("Failed to allocate BIO size=%u\n",
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200392 bio_size);
393 return -ENOMEM;
394 }
395 }
396
397 while (cur_len > 0) {
Boaz Harrosh86093aa2010-01-28 18:24:06 +0200398 unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len);
399 unsigned added_len;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200400
Boaz Harrosh86093aa2010-01-28 18:24:06 +0200401 BUG_ON(ios->nr_pages <= pg);
402 cur_len -= pglen;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200403
Boaz Harrosh86093aa2010-01-28 18:24:06 +0200404 added_len = bio_add_pc_page(q, per_dev->bio, ios->pages[pg],
405 pglen, pgbase);
406 if (unlikely(pglen != added_len))
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200407 return -ENOMEM;
Boaz Harrosh86093aa2010-01-28 18:24:06 +0200408 pgbase = 0;
409 ++pg;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200410 }
411 BUG_ON(cur_len);
412
Boaz Harrosh86093aa2010-01-28 18:24:06 +0200413 *cur_pg = pg;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200414 return 0;
415}
416
Boaz Harrosh98260752011-10-02 15:32:50 +0200417static int _prepare_for_striping(struct ore_io_state *ios)
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200418{
Boaz Harrosh98260752011-10-02 15:32:50 +0200419 struct ore_striping_info *si = &ios->si;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200420 unsigned stripe_unit = ios->layout->stripe_unit;
Boaz Harroshb367e782010-02-07 19:18:58 +0200421 unsigned mirrors_p1 = ios->layout->mirrors_p1;
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200422 unsigned devs_in_group = ios->layout->group_width * mirrors_p1;
Boaz Harroshb367e782010-02-07 19:18:58 +0200423 unsigned dev = si->dev;
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200424 unsigned first_dev = dev - (dev % devs_in_group);
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200425 unsigned cur_pg = ios->pages_consumed;
Boaz Harrosh98260752011-10-02 15:32:50 +0200426 u64 length = ios->length;
Boaz Harrosh86093aa2010-01-28 18:24:06 +0200427 int ret = 0;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200428
Boaz Harrosh98260752011-10-02 15:32:50 +0200429 if (!ios->pages) {
430 if (ios->kern_buff) {
431 struct ore_per_dev_state *per_dev = &ios->per_dev[0];
432
433 per_dev->offset = si->obj_offset;
434 per_dev->dev = si->dev;
435
436 /* no cross device without page array */
437 BUG_ON((ios->layout->group_width > 1) &&
438 (si->unit_off + ios->length >
439 ios->layout->stripe_unit));
440 }
441 ios->numdevs = ios->layout->mirrors_p1;
442 return 0;
443 }
444
445 BUG_ON(length > si->group_length);
446
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200447 while (length) {
Boaz Harroshb916c5c2011-09-28 11:55:51 +0300448 unsigned comp = dev - first_dev;
449 struct ore_per_dev_state *per_dev = &ios->per_dev[comp];
Boaz Harroshb367e782010-02-07 19:18:58 +0200450 unsigned cur_len, page_off = 0;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200451
452 if (!per_dev->length) {
Boaz Harroshb367e782010-02-07 19:18:58 +0200453 per_dev->dev = dev;
454 if (dev < si->dev) {
455 per_dev->offset = si->obj_offset + stripe_unit -
456 si->unit_off;
457 cur_len = stripe_unit;
458 } else if (dev == si->dev) {
459 per_dev->offset = si->obj_offset;
460 cur_len = stripe_unit - si->unit_off;
461 page_off = si->unit_off & ~PAGE_MASK;
462 BUG_ON(page_off && (page_off != ios->pgbase));
463 } else { /* dev > si->dev */
464 per_dev->offset = si->obj_offset - si->unit_off;
465 cur_len = stripe_unit;
466 }
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200467 } else {
Boaz Harroshb367e782010-02-07 19:18:58 +0200468 cur_len = stripe_unit;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200469 }
Boaz Harroshb367e782010-02-07 19:18:58 +0200470 if (cur_len >= length)
471 cur_len = length;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200472
Boaz Harrosh86093aa2010-01-28 18:24:06 +0200473 ret = _add_stripe_unit(ios, &cur_pg, page_off , per_dev,
474 cur_len);
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200475 if (unlikely(ret))
476 goto out;
477
Boaz Harrosh6e316092010-07-29 17:08:13 +0300478 dev += mirrors_p1;
479 dev = (dev % devs_in_group) + first_dev;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200480
481 length -= cur_len;
482 }
483out:
Boaz Harroshb916c5c2011-09-28 11:55:51 +0300484 ios->numdevs = devs_in_group;
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200485 ios->pages_consumed = cur_pg;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200486 return ret;
487}
488
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700489int ore_create(struct ore_io_state *ios)
Boaz Harrosh06886a52009-11-08 14:54:08 +0200490{
491 int i, ret;
492
Boaz Harrosh5bf696d2011-09-28 11:39:59 +0300493 for (i = 0; i < ios->oc->numdevs; i++) {
Boaz Harrosh06886a52009-11-08 14:54:08 +0200494 struct osd_request *or;
495
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700496 or = osd_start_request(_ios_od(ios, i), GFP_KERNEL);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200497 if (unlikely(!or)) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700498 ORE_ERR("%s: osd_start_request failed\n", __func__);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200499 ret = -ENOMEM;
500 goto out;
501 }
502 ios->per_dev[i].or = or;
503 ios->numdevs++;
504
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700505 osd_req_create_object(or, _ios_obj(ios, i));
Boaz Harrosh06886a52009-11-08 14:54:08 +0200506 }
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700507 ret = ore_io_execute(ios);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200508
509out:
510 return ret;
511}
Boaz Harroshcf283ad2011-08-06 19:22:06 -0700512EXPORT_SYMBOL(ore_create);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200513
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700514int ore_remove(struct ore_io_state *ios)
Boaz Harrosh06886a52009-11-08 14:54:08 +0200515{
516 int i, ret;
517
Boaz Harrosh5bf696d2011-09-28 11:39:59 +0300518 for (i = 0; i < ios->oc->numdevs; i++) {
Boaz Harrosh06886a52009-11-08 14:54:08 +0200519 struct osd_request *or;
520
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700521 or = osd_start_request(_ios_od(ios, i), GFP_KERNEL);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200522 if (unlikely(!or)) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700523 ORE_ERR("%s: osd_start_request failed\n", __func__);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200524 ret = -ENOMEM;
525 goto out;
526 }
527 ios->per_dev[i].or = or;
528 ios->numdevs++;
529
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700530 osd_req_remove_object(or, _ios_obj(ios, i));
Boaz Harrosh06886a52009-11-08 14:54:08 +0200531 }
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700532 ret = ore_io_execute(ios);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200533
534out:
535 return ret;
536}
Boaz Harroshcf283ad2011-08-06 19:22:06 -0700537EXPORT_SYMBOL(ore_remove);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200538
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700539static int _write_mirror(struct ore_io_state *ios, int cur_comp)
Boaz Harrosh06886a52009-11-08 14:54:08 +0200540{
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700541 struct ore_per_dev_state *master_dev = &ios->per_dev[cur_comp];
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200542 unsigned dev = ios->per_dev[cur_comp].dev;
543 unsigned last_comp = cur_comp + ios->layout->mirrors_p1;
544 int ret = 0;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200545
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200546 if (ios->pages && !master_dev->length)
547 return 0; /* Just an empty slot */
548
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200549 for (; cur_comp < last_comp; ++cur_comp, ++dev) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700550 struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp];
Boaz Harrosh06886a52009-11-08 14:54:08 +0200551 struct osd_request *or;
552
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700553 or = osd_start_request(_ios_od(ios, dev), GFP_KERNEL);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200554 if (unlikely(!or)) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700555 ORE_ERR("%s: osd_start_request failed\n", __func__);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200556 ret = -ENOMEM;
557 goto out;
558 }
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200559 per_dev->or = or;
560 per_dev->offset = master_dev->offset;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200561
Boaz Harrosh86093aa2010-01-28 18:24:06 +0200562 if (ios->pages) {
Boaz Harrosh06886a52009-11-08 14:54:08 +0200563 struct bio *bio;
564
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200565 if (per_dev != master_dev) {
Boaz Harrosh04dc1e82009-11-16 16:03:05 +0200566 bio = bio_kmalloc(GFP_KERNEL,
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200567 master_dev->bio->bi_max_vecs);
Boaz Harrosh04dc1e82009-11-16 16:03:05 +0200568 if (unlikely(!bio)) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700569 ORE_DBGMSG(
Paul Bolle426d3102010-08-07 12:30:03 +0200570 "Failed to allocate BIO size=%u\n",
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200571 master_dev->bio->bi_max_vecs);
Boaz Harrosh04dc1e82009-11-16 16:03:05 +0200572 ret = -ENOMEM;
573 goto out;
574 }
575
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200576 __bio_clone(bio, master_dev->bio);
Boaz Harrosh04dc1e82009-11-16 16:03:05 +0200577 bio->bi_bdev = NULL;
578 bio->bi_next = NULL;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200579 per_dev->length = master_dev->length;
580 per_dev->bio = bio;
581 per_dev->dev = dev;
Boaz Harrosh04dc1e82009-11-16 16:03:05 +0200582 } else {
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200583 bio = master_dev->bio;
584 /* FIXME: bio_set_dir() */
Christoph Hellwig7b6d91d2010-08-07 18:20:39 +0200585 bio->bi_rw |= REQ_WRITE;
Boaz Harrosh04dc1e82009-11-16 16:03:05 +0200586 }
Boaz Harrosh06886a52009-11-08 14:54:08 +0200587
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700588 osd_req_write(or, _ios_obj(ios, dev), per_dev->offset,
589 bio, per_dev->length);
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700590 ORE_DBGMSG("write(0x%llx) offset=0x%llx "
Boaz Harrosh34ce4e7c2009-12-15 19:34:17 +0200591 "length=0x%llx dev=%d\n",
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700592 _LLU(_ios_obj(ios, dev)->id),
593 _LLU(per_dev->offset),
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200594 _LLU(per_dev->length), dev);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200595 } else if (ios->kern_buff) {
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700596 ret = osd_req_write_kern(or, _ios_obj(ios, dev),
597 per_dev->offset,
598 ios->kern_buff, ios->length);
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200599 if (unlikely(ret))
600 goto out;
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700601 ORE_DBGMSG2("write_kern(0x%llx) offset=0x%llx "
Boaz Harrosh34ce4e7c2009-12-15 19:34:17 +0200602 "length=0x%llx dev=%d\n",
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700603 _LLU(_ios_obj(ios, dev)->id),
604 _LLU(per_dev->offset),
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200605 _LLU(ios->length), dev);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200606 } else {
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700607 osd_req_set_attributes(or, _ios_obj(ios, dev));
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700608 ORE_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n",
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700609 _LLU(_ios_obj(ios, dev)->id),
610 ios->out_attr_len, dev);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200611 }
612
613 if (ios->out_attr)
614 osd_req_add_set_attr_list(or, ios->out_attr,
615 ios->out_attr_len);
616
617 if (ios->in_attr)
618 osd_req_add_get_attr_list(or, ios->in_attr,
619 ios->in_attr_len);
620 }
Boaz Harrosh06886a52009-11-08 14:54:08 +0200621
622out:
623 return ret;
624}
625
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700626int ore_write(struct ore_io_state *ios)
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200627{
628 int i;
629 int ret;
630
631 ret = _prepare_for_striping(ios);
632 if (unlikely(ret))
633 return ret;
634
635 for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700636 ret = _write_mirror(ios, i);
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200637 if (unlikely(ret))
638 return ret;
639 }
640
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700641 ret = ore_io_execute(ios);
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200642 return ret;
643}
Boaz Harroshcf283ad2011-08-06 19:22:06 -0700644EXPORT_SYMBOL(ore_write);
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200645
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700646static int _read_mirror(struct ore_io_state *ios, unsigned cur_comp)
Boaz Harrosh06886a52009-11-08 14:54:08 +0200647{
Boaz Harrosh46f4d972010-02-01 11:37:30 +0200648 struct osd_request *or;
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700649 struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp];
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700650 struct osd_obj_id *obj = _ios_obj(ios, cur_comp);
651 unsigned first_dev = (unsigned)obj->id;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200652
Boaz Harrosh50a76fd2010-02-11 13:01:39 +0200653 if (ios->pages && !per_dev->length)
654 return 0; /* Just an empty slot */
655
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200656 first_dev = per_dev->dev + first_dev % ios->layout->mirrors_p1;
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700657 or = osd_start_request(_ios_od(ios, first_dev), GFP_KERNEL);
Boaz Harrosh46f4d972010-02-01 11:37:30 +0200658 if (unlikely(!or)) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700659 ORE_ERR("%s: osd_start_request failed\n", __func__);
Boaz Harrosh46f4d972010-02-01 11:37:30 +0200660 return -ENOMEM;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200661 }
Boaz Harrosh46f4d972010-02-01 11:37:30 +0200662 per_dev->or = or;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200663
Boaz Harrosh86093aa2010-01-28 18:24:06 +0200664 if (ios->pages) {
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700665 osd_req_read(or, obj, per_dev->offset,
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200666 per_dev->bio, per_dev->length);
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700667 ORE_DBGMSG("read(0x%llx) offset=0x%llx length=0x%llx"
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700668 " dev=%d\n", _LLU(obj->id),
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200669 _LLU(per_dev->offset), _LLU(per_dev->length),
Boaz Harrosh46f4d972010-02-01 11:37:30 +0200670 first_dev);
671 } else if (ios->kern_buff) {
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700672 int ret = osd_req_read_kern(or, obj, per_dev->offset,
Boaz Harrosh46f4d972010-02-01 11:37:30 +0200673 ios->kern_buff, ios->length);
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700674 ORE_DBGMSG2("read_kern(0x%llx) offset=0x%llx "
Boaz Harrosh46f4d972010-02-01 11:37:30 +0200675 "length=0x%llx dev=%d ret=>%d\n",
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700676 _LLU(obj->id), _LLU(per_dev->offset),
Boaz Harrosh46f4d972010-02-01 11:37:30 +0200677 _LLU(ios->length), first_dev, ret);
678 if (unlikely(ret))
679 return ret;
680 } else {
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700681 osd_req_get_attributes(or, obj);
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700682 ORE_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n",
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700683 _LLU(obj->id),
684 ios->in_attr_len, first_dev);
Boaz Harrosh46f4d972010-02-01 11:37:30 +0200685 }
Boaz Harrosh46f4d972010-02-01 11:37:30 +0200686 if (ios->out_attr)
687 osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len);
688
689 if (ios->in_attr)
690 osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len);
691
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200692 return 0;
693}
694
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700695int ore_read(struct ore_io_state *ios)
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200696{
697 int i;
698 int ret;
699
700 ret = _prepare_for_striping(ios);
701 if (unlikely(ret))
702 return ret;
703
704 for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700705 ret = _read_mirror(ios, i);
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200706 if (unlikely(ret))
707 return ret;
708 }
709
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700710 ret = ore_io_execute(ios);
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200711 return ret;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200712}
Boaz Harroshcf283ad2011-08-06 19:22:06 -0700713EXPORT_SYMBOL(ore_read);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200714
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700715int extract_attr_from_ios(struct ore_io_state *ios, struct osd_attr *attr)
Boaz Harroshb14f8ab2008-10-27 18:27:55 +0200716{
717 struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */
718 void *iter = NULL;
719 int nelem;
720
721 do {
722 nelem = 1;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200723 osd_req_decode_get_attr_list(ios->per_dev[0].or,
724 &cur_attr, &nelem, &iter);
Boaz Harroshb14f8ab2008-10-27 18:27:55 +0200725 if ((cur_attr.attr_page == attr->attr_page) &&
726 (cur_attr.attr_id == attr->attr_id)) {
727 attr->len = cur_attr.len;
728 attr->val_ptr = cur_attr.val_ptr;
729 return 0;
730 }
731 } while (iter);
732
733 return -EIO;
734}
Boaz Harroshcf283ad2011-08-06 19:22:06 -0700735EXPORT_SYMBOL(extract_attr_from_ios);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200736
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700737static int _truncate_mirrors(struct ore_io_state *ios, unsigned cur_comp,
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200738 struct osd_attr *attr)
739{
740 int last_comp = cur_comp + ios->layout->mirrors_p1;
741
742 for (; cur_comp < last_comp; ++cur_comp) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700743 struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp];
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200744 struct osd_request *or;
745
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700746 or = osd_start_request(_ios_od(ios, cur_comp), GFP_KERNEL);
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200747 if (unlikely(!or)) {
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700748 ORE_ERR("%s: osd_start_request failed\n", __func__);
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200749 return -ENOMEM;
750 }
751 per_dev->or = or;
752
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700753 osd_req_set_attributes(or, _ios_obj(ios, cur_comp));
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200754 osd_req_add_set_attr_list(or, attr, 1);
755 }
756
757 return 0;
758}
759
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700760struct _trunc_info {
Boaz Harrosheb507bc2011-08-10 14:17:28 -0700761 struct ore_striping_info si;
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700762 u64 prev_group_obj_off;
763 u64 next_group_obj_off;
764
765 unsigned first_group_dev;
766 unsigned nex_group_dev;
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700767};
768
H Hartley Sweeten1958c7c22011-09-23 13:42:43 -0700769static void _calc_trunk_info(struct ore_layout *layout, u64 file_offset,
770 struct _trunc_info *ti)
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700771{
772 unsigned stripe_unit = layout->stripe_unit;
773
Boaz Harrosheb507bc2011-08-10 14:17:28 -0700774 ore_calc_stripe_info(layout, file_offset, &ti->si);
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700775
776 ti->prev_group_obj_off = ti->si.M * stripe_unit;
777 ti->next_group_obj_off = ti->si.M ? (ti->si.M - 1) * stripe_unit : 0;
778
779 ti->first_group_dev = ti->si.dev - (ti->si.dev % layout->group_width);
780 ti->nex_group_dev = ti->first_group_dev + layout->group_width;
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700781}
782
Boaz Harrosh5bf696d2011-09-28 11:39:59 +0300783int ore_truncate(struct ore_layout *layout, struct ore_components *oc,
Boaz Harrosh9e9db452011-08-05 15:06:04 -0700784 u64 size)
Boaz Harrosh06886a52009-11-08 14:54:08 +0200785{
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700786 struct ore_io_state *ios;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200787 struct exofs_trunc_attr {
788 struct osd_attr attr;
789 __be64 newsize;
790 } *size_attrs;
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700791 struct _trunc_info ti;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200792 int i, ret;
793
Boaz Harrosh5bf696d2011-09-28 11:39:59 +0300794 ret = ore_get_io_state(layout, oc, &ios);
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200795 if (unlikely(ret))
796 return ret;
797
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700798 _calc_trunk_info(ios->layout, size, &ti);
799
Boaz Harroshb916c5c2011-09-28 11:55:51 +0300800 size_attrs = kcalloc(ios->oc->numdevs, sizeof(*size_attrs),
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200801 GFP_KERNEL);
802 if (unlikely(!size_attrs)) {
803 ret = -ENOMEM;
804 goto out;
805 }
Boaz Harrosh06886a52009-11-08 14:54:08 +0200806
Boaz Harrosh5bf696d2011-09-28 11:39:59 +0300807 ios->numdevs = ios->oc->numdevs;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200808
Boaz Harroshb916c5c2011-09-28 11:55:51 +0300809 for (i = 0; i < ios->numdevs; ++i) {
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200810 struct exofs_trunc_attr *size_attr = &size_attrs[i];
811 u64 obj_size;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200812
Boaz Harrosh16f75bb2011-08-03 20:44:16 -0700813 if (i < ti.first_group_dev)
814 obj_size = ti.prev_group_obj_off;
815 else if (i >= ti.nex_group_dev)
816 obj_size = ti.next_group_obj_off;
817 else if (i < ti.si.dev) /* dev within this group */
818 obj_size = ti.si.obj_offset +
819 ios->layout->stripe_unit - ti.si.unit_off;
820 else if (i == ti.si.dev)
821 obj_size = ti.si.obj_offset;
822 else /* i > ti.dev */
823 obj_size = ti.si.obj_offset - ti.si.unit_off;
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200824
825 size_attr->newsize = cpu_to_be64(obj_size);
826 size_attr->attr = g_attr_logical_length;
827 size_attr->attr.val_ptr = &size_attr->newsize;
828
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700829 ORE_DBGMSG("trunc(0x%llx) obj_offset=0x%llx dev=%d\n",
Boaz Harrosh5bf696d2011-09-28 11:39:59 +0300830 _LLU(oc->comps->obj.id), _LLU(obj_size), i);
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200831 ret = _truncate_mirrors(ios, i * ios->layout->mirrors_p1,
832 &size_attr->attr);
833 if (unlikely(ret))
Boaz Harrosh06886a52009-11-08 14:54:08 +0200834 goto out;
Boaz Harrosh06886a52009-11-08 14:54:08 +0200835 }
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700836 ret = ore_io_execute(ios);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200837
838out:
Boaz Harrosh5d952b82010-02-01 13:35:51 +0200839 kfree(size_attrs);
Boaz Harrosh8ff660a2011-08-06 19:26:31 -0700840 ore_put_io_state(ios);
Boaz Harrosh06886a52009-11-08 14:54:08 +0200841 return ret;
842}
Boaz Harroshcf283ad2011-08-06 19:22:06 -0700843EXPORT_SYMBOL(ore_truncate);
Boaz Harrosh85e44df2011-05-16 15:26:47 +0300844
845const struct osd_attr g_attr_logical_length = ATTR_DEF(
846 OSD_APAGE_OBJECT_INFORMATION, OSD_ATTR_OI_LOGICAL_LENGTH, 8);
Boaz Harroshcf283ad2011-08-06 19:22:06 -0700847EXPORT_SYMBOL(g_attr_logical_length);