2 * Copyright (C) 2005, 2006
3 * Avishay Traeger (avishay@gmail.com)
4 * Copyright (C) 2008, 2009
5 * Boaz Harrosh <bharrosh@panasas.com>
7 * This file is part of exofs.
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.
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.
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
25 #include <scsi/scsi_device.h>
29 #define EXOFS_DBGMSG2(M...) do {} while (0)
30 /* #define EXOFS_DBGMSG2 EXOFS_DBGMSG */
32 void exofs_make_credential(u8 cred_a
[OSD_CAP_LEN
], const struct osd_obj_id
*obj
)
34 osd_sec_init_nosec_doall_caps(cred_a
, obj
, false, true);
37 int exofs_read_kern(struct osd_dev
*od
, u8
*cred
, struct osd_obj_id
*obj
,
38 u64 offset
, void *p
, unsigned length
)
40 struct osd_request
*or = osd_start_request(od
, GFP_KERNEL
);
41 /* struct osd_sense_info osi = {.key = 0};*/
45 EXOFS_DBGMSG("%s: osd_start_request failed.\n", __func__
);
48 ret
= osd_req_read_kern(or, obj
, offset
, p
, length
);
50 EXOFS_DBGMSG("%s: osd_req_read_kern failed.\n", __func__
);
54 ret
= osd_finalize_request(or, 0, cred
, NULL
);
56 EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret
);
60 ret
= osd_execute_request(or);
62 EXOFS_DBGMSG("osd_execute_request() => %d\n", ret
);
63 /* osd_req_decode_sense(or, ret); */
70 int exofs_get_io_state(struct exofs_sb_info
*sbi
, struct exofs_io_state
** pios
)
72 struct exofs_io_state
*ios
;
74 /*TODO: Maybe use kmem_cach per sbi of size
75 * exofs_io_state_size(sbi->s_numdevs)
77 ios
= kzalloc(exofs_io_state_size(sbi
->s_numdevs
), GFP_KERNEL
);
79 EXOFS_DBGMSG("Faild kzalloc bytes=%d\n",
80 exofs_io_state_size(sbi
->s_numdevs
));
86 ios
->obj
.partition
= sbi
->s_pid
;
91 void exofs_put_io_state(struct exofs_io_state
*ios
)
96 for (i
= 0; i
< ios
->numdevs
; i
++) {
97 struct exofs_per_dev_state
*per_dev
= &ios
->per_dev
[i
];
100 osd_end_request(per_dev
->or);
102 bio_put(per_dev
->bio
);
109 static void _sync_done(struct exofs_io_state
*ios
, void *p
)
111 struct completion
*waiting
= p
;
116 static void _last_io(struct kref
*kref
)
118 struct exofs_io_state
*ios
= container_of(
119 kref
, struct exofs_io_state
, kref
);
121 ios
->done(ios
, ios
->private);
124 static void _done_io(struct osd_request
*or, void *p
)
126 struct exofs_io_state
*ios
= p
;
128 kref_put(&ios
->kref
, _last_io
);
131 static int exofs_io_execute(struct exofs_io_state
*ios
)
133 DECLARE_COMPLETION_ONSTACK(wait
);
134 bool sync
= (ios
->done
== NULL
);
138 ios
->done
= _sync_done
;
139 ios
->private = &wait
;
142 for (i
= 0; i
< ios
->numdevs
; i
++) {
143 struct osd_request
*or = ios
->per_dev
[i
].or;
147 ret
= osd_finalize_request(or, 0, ios
->cred
, NULL
);
149 EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n",
155 kref_init(&ios
->kref
);
157 for (i
= 0; i
< ios
->numdevs
; i
++) {
158 struct osd_request
*or = ios
->per_dev
[i
].or;
162 kref_get(&ios
->kref
);
163 osd_execute_request_async(or, _done_io
, ios
);
166 kref_put(&ios
->kref
, _last_io
);
170 wait_for_completion(&wait
);
171 ret
= exofs_check_io(ios
, NULL
);
176 int exofs_check_io(struct exofs_io_state
*ios
, u64
*resid
)
178 enum osd_err_priority acumulated_osd_err
= 0;
179 int acumulated_lin_err
= 0;
182 for (i
= 0; i
< ios
->numdevs
; i
++) {
183 struct osd_sense_info osi
;
184 int ret
= osd_req_decode_sense(ios
->per_dev
[i
].or, &osi
);
189 if (unlikely(ret
== -EFAULT
)) {
190 EXOFS_DBGMSG("%s: EFAULT Need page clear\n", __func__
);
191 /*FIXME: All the pages in this device range should:
192 * clear_highpage(page);
196 if (osi
.osd_err_pri
>= acumulated_osd_err
) {
197 acumulated_osd_err
= osi
.osd_err_pri
;
198 acumulated_lin_err
= ret
;
202 /* TODO: raid specific residual calculations */
204 if (likely(!acumulated_lin_err
))
207 *resid
= ios
->length
;
210 return acumulated_lin_err
;
213 int exofs_sbi_create(struct exofs_io_state
*ios
)
217 for (i
= 0; i
< ios
->sbi
->s_numdevs
; i
++) {
218 struct osd_request
*or;
220 or = osd_start_request(ios
->sbi
->s_ods
[i
], GFP_KERNEL
);
222 EXOFS_ERR("%s: osd_start_request failed\n", __func__
);
226 ios
->per_dev
[i
].or = or;
229 osd_req_create_object(or, &ios
->obj
);
231 ret
= exofs_io_execute(ios
);
237 int exofs_sbi_remove(struct exofs_io_state
*ios
)
241 for (i
= 0; i
< ios
->sbi
->s_numdevs
; i
++) {
242 struct osd_request
*or;
244 or = osd_start_request(ios
->sbi
->s_ods
[i
], GFP_KERNEL
);
246 EXOFS_ERR("%s: osd_start_request failed\n", __func__
);
250 ios
->per_dev
[i
].or = or;
253 osd_req_remove_object(or, &ios
->obj
);
255 ret
= exofs_io_execute(ios
);
261 int exofs_sbi_write(struct exofs_io_state
*ios
)
265 for (i
= 0; i
< ios
->sbi
->s_numdevs
; i
++) {
266 struct osd_request
*or;
268 or = osd_start_request(ios
->sbi
->s_ods
[i
], GFP_KERNEL
);
270 EXOFS_ERR("%s: osd_start_request failed\n", __func__
);
274 ios
->per_dev
[i
].or = or;
281 bio
= bio_kmalloc(GFP_KERNEL
,
282 ios
->bio
->bi_max_vecs
);
283 if (unlikely(!bio
)) {
285 "Faild to allocate BIO size=%u\n",
286 ios
->bio
->bi_max_vecs
);
291 __bio_clone(bio
, ios
->bio
);
294 ios
->per_dev
[i
].bio
= bio
;
299 osd_req_write(or, &ios
->obj
, ios
->offset
, bio
,
301 EXOFS_DBGMSG("write(0x%llx) offset=0x%llx "
302 "length=0x%llx dev=%d\n",
303 _LLU(ios
->obj
.id
), _LLU(ios
->offset
),
304 _LLU(ios
->length
), i
);
305 } else if (ios
->kern_buff
) {
306 osd_req_write_kern(or, &ios
->obj
, ios
->offset
,
307 ios
->kern_buff
, ios
->length
);
308 EXOFS_DBGMSG2("write_kern(0x%llx) offset=0x%llx "
309 "length=0x%llx dev=%d\n",
310 _LLU(ios
->obj
.id
), _LLU(ios
->offset
),
311 _LLU(ios
->length
), i
);
313 osd_req_set_attributes(or, &ios
->obj
);
314 EXOFS_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n",
315 _LLU(ios
->obj
.id
), ios
->out_attr_len
, i
);
319 osd_req_add_set_attr_list(or, ios
->out_attr
,
323 osd_req_add_get_attr_list(or, ios
->in_attr
,
326 ret
= exofs_io_execute(ios
);
332 int exofs_sbi_read(struct exofs_io_state
*ios
)
336 for (i
= 0; i
< 1; i
++) {
337 struct osd_request
*or;
338 unsigned first_dev
= (unsigned)ios
->obj
.id
;
340 first_dev
%= ios
->sbi
->s_numdevs
;
341 or = osd_start_request(ios
->sbi
->s_ods
[first_dev
], GFP_KERNEL
);
343 EXOFS_ERR("%s: osd_start_request failed\n", __func__
);
347 ios
->per_dev
[i
].or = or;
351 osd_req_read(or, &ios
->obj
, ios
->offset
, ios
->bio
,
353 EXOFS_DBGMSG("read(0x%llx) offset=0x%llx length=0x%llx"
354 " dev=%d\n", _LLU(ios
->obj
.id
),
358 } else if (ios
->kern_buff
) {
359 osd_req_read_kern(or, &ios
->obj
, ios
->offset
,
360 ios
->kern_buff
, ios
->length
);
361 EXOFS_DBGMSG2("read_kern(0x%llx) offset=0x%llx "
362 "length=0x%llx dev=%d\n",
368 osd_req_get_attributes(or, &ios
->obj
);
369 EXOFS_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n",
370 _LLU(ios
->obj
.id
), ios
->in_attr_len
,
375 osd_req_add_set_attr_list(or, ios
->out_attr
,
379 osd_req_add_get_attr_list(or, ios
->in_attr
,
382 ret
= exofs_io_execute(ios
);
388 int extract_attr_from_ios(struct exofs_io_state
*ios
, struct osd_attr
*attr
)
390 struct osd_attr cur_attr
= {.attr_page
= 0}; /* start with zeros */
396 osd_req_decode_get_attr_list(ios
->per_dev
[0].or,
397 &cur_attr
, &nelem
, &iter
);
398 if ((cur_attr
.attr_page
== attr
->attr_page
) &&
399 (cur_attr
.attr_id
== attr
->attr_id
)) {
400 attr
->len
= cur_attr
.len
;
401 attr
->val_ptr
= cur_attr
.val_ptr
;
409 int exofs_oi_truncate(struct exofs_i_info
*oi
, u64 size
)
411 struct exofs_sb_info
*sbi
= oi
->vfs_inode
.i_sb
->s_fs_info
;
412 struct exofs_io_state
*ios
;
413 struct osd_attr attr
;
417 if (exofs_get_io_state(sbi
, &ios
))
420 ios
->obj
.id
= exofs_oi_objno(oi
);
421 ios
->cred
= oi
->i_cred
;
423 newsize
= cpu_to_be64(size
);
424 attr
= g_attr_logical_length
;
425 attr
.val_ptr
= &newsize
;
427 for (i
= 0; i
< sbi
->s_numdevs
; i
++) {
428 struct osd_request
*or;
430 or = osd_start_request(sbi
->s_ods
[i
], GFP_KERNEL
);
432 EXOFS_ERR("%s: osd_start_request failed\n", __func__
);
436 ios
->per_dev
[i
].or = or;
439 osd_req_set_attributes(or, &ios
->obj
);
440 osd_req_add_set_attr_list(or, &attr
, 1);
442 ret
= exofs_io_execute(ios
);
445 exofs_put_io_state(ios
);