1 /*-
2 * Copyright (c) 2010-2012 Semihalf.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: stable/10/sys/fs/nandfs/nandfs_dat.c 235537 2012-05-17 10:11:18Z gber $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/conf.h>
33 #include <sys/kernel.h>
34 #include <sys/lock.h>
35 #include <sys/malloc.h>
36 #include <sys/mount.h>
37 #include <sys/mutex.h>
38 #include <sys/namei.h>
39 #include <sys/sysctl.h>
40 #include <sys/vnode.h>
41 #include <sys/buf.h>
42 #include <sys/bio.h>
43
44 #include <vm/vm.h>
45 #include <vm/vm_param.h>
46 #include <vm/vm_kern.h>
47 #include <vm/vm_page.h>
48
49 #include <fs/nandfs/nandfs_mount.h>
50 #include <fs/nandfs/nandfs.h>
51 #include <fs/nandfs/nandfs_subr.h>
52
53 int
nandfs_vblock_alloc(struct nandfs_device * nandfsdev,nandfs_daddr_t * vblock)54 nandfs_vblock_alloc(struct nandfs_device *nandfsdev, nandfs_daddr_t *vblock)
55 {
56 struct nandfs_node *dat;
57 struct nandfs_mdt *mdt;
58 struct nandfs_alloc_request req;
59 struct nandfs_dat_entry *dat_entry;
60 uint64_t start;
61 uint32_t entry;
62 int locked, error;
63
64 dat = nandfsdev->nd_dat_node;
65 mdt = &nandfsdev->nd_dat_mdt;
66 start = nandfsdev->nd_last_cno + 1;
67
68 locked = NANDFS_VOP_ISLOCKED(NTOV(dat));
69 if (!locked)
70 VOP_LOCK(NTOV(dat), LK_EXCLUSIVE);
71 req.entrynum = 0;
72
73 /* Alloc vblock number */
74 error = nandfs_find_free_entry(mdt, dat, &req);
75 if (error) {
76 nandfs_error("%s: cannot find free vblk entry\n",
77 __func__);
78 if (!locked)
79 VOP_UNLOCK(NTOV(dat), 0);
80 return (error);
81 }
82
83 /* Read/create buffer */
84 error = nandfs_get_entry_block(mdt, dat, &req, &entry, 1);
85 if (error) {
86 nandfs_error("%s: cannot get free vblk entry\n",
87 __func__);
88 nandfs_abort_entry(&req);
89 if (!locked)
90 VOP_UNLOCK(NTOV(dat), 0);
91 return (error);
92 }
93
94 /* Fill out vblock data */
95 dat_entry = (struct nandfs_dat_entry *) req.bp_entry->b_data;
96 dat_entry[entry].de_start = start;
97 dat_entry[entry].de_end = UINTMAX_MAX;
98 dat_entry[entry].de_blocknr = 0;
99
100 /* Commit allocation */
101 error = nandfs_alloc_entry(mdt, &req);
102 if (error) {
103 nandfs_error("%s: cannot get free vblk entry\n",
104 __func__);
105 if (!locked)
106 VOP_UNLOCK(NTOV(dat), 0);
107 return (error);
108 }
109
110 /* Return allocated vblock */
111 *vblock = req.entrynum;
112 DPRINTF(DAT, ("%s: allocated vblock %#jx\n",
113 __func__, (uintmax_t)*vblock));
114
115 if (!locked)
116 VOP_UNLOCK(NTOV(dat), 0);
117 return (error);
118 }
119
120 int
nandfs_vblock_assign(struct nandfs_device * nandfsdev,nandfs_daddr_t vblock,nandfs_lbn_t block)121 nandfs_vblock_assign(struct nandfs_device *nandfsdev, nandfs_daddr_t vblock,
122 nandfs_lbn_t block)
123 {
124 struct nandfs_node *dat;
125 struct nandfs_mdt *mdt;
126 struct nandfs_alloc_request req;
127 struct nandfs_dat_entry *dat_entry;
128 uint32_t entry;
129 int locked, error;
130
131 dat = nandfsdev->nd_dat_node;
132 mdt = &nandfsdev->nd_dat_mdt;
133
134 locked = NANDFS_VOP_ISLOCKED(NTOV(dat));
135 if (!locked)
136 VOP_LOCK(NTOV(dat), LK_EXCLUSIVE);
137 req.entrynum = vblock;
138
139 error = nandfs_get_entry_block(mdt, dat, &req, &entry, 0);
140 if (!error) {
141 dat_entry = (struct nandfs_dat_entry *) req.bp_entry->b_data;
142 dat_entry[entry].de_blocknr = block;
143
144 DPRINTF(DAT, ("%s: assing vblock %jx->%jx\n",
145 __func__, (uintmax_t)vblock, (uintmax_t)block));
146
147 /*
148 * It is mostly called from syncer() so
149 * we want to force making buf dirty
150 */
151 error = nandfs_dirty_buf(req.bp_entry, 1);
152 }
153
154 if (!locked)
155 VOP_UNLOCK(NTOV(dat), 0);
156
157 return (error);
158 }
159
160 int
nandfs_vblock_end(struct nandfs_device * nandfsdev,nandfs_daddr_t vblock)161 nandfs_vblock_end(struct nandfs_device *nandfsdev, nandfs_daddr_t vblock)
162 {
163 struct nandfs_node *dat;
164 struct nandfs_mdt *mdt;
165 struct nandfs_alloc_request req;
166 struct nandfs_dat_entry *dat_entry;
167 uint64_t end;
168 uint32_t entry;
169 int locked, error;
170
171 dat = nandfsdev->nd_dat_node;
172 mdt = &nandfsdev->nd_dat_mdt;
173 end = nandfsdev->nd_last_cno;
174
175 locked = NANDFS_VOP_ISLOCKED(NTOV(dat));
176 if (!locked)
177 VOP_LOCK(NTOV(dat), LK_EXCLUSIVE);
178 req.entrynum = vblock;
179
180 error = nandfs_get_entry_block(mdt, dat, &req, &entry, 0);
181 if (!error) {
182 dat_entry = (struct nandfs_dat_entry *) req.bp_entry->b_data;
183 dat_entry[entry].de_end = end;
184 DPRINTF(DAT, ("%s: end vblock %#jx at checkpoint %#jx\n",
185 __func__, (uintmax_t)vblock, (uintmax_t)end));
186
187 /*
188 * It is mostly called from syncer() so
189 * we want to force making buf dirty
190 */
191 error = nandfs_dirty_buf(req.bp_entry, 1);
192 }
193
194 if (!locked)
195 VOP_UNLOCK(NTOV(dat), 0);
196
197 return (error);
198 }
199
200 int
nandfs_vblock_free(struct nandfs_device * nandfsdev,nandfs_daddr_t vblock)201 nandfs_vblock_free(struct nandfs_device *nandfsdev, nandfs_daddr_t vblock)
202 {
203 struct nandfs_node *dat;
204 struct nandfs_mdt *mdt;
205 struct nandfs_alloc_request req;
206 int error;
207
208 dat = nandfsdev->nd_dat_node;
209 mdt = &nandfsdev->nd_dat_mdt;
210
211 VOP_LOCK(NTOV(dat), LK_EXCLUSIVE);
212 req.entrynum = vblock;
213
214 error = nandfs_find_entry(mdt, dat, &req);
215 if (!error) {
216 DPRINTF(DAT, ("%s: vblk %#jx\n", __func__, (uintmax_t)vblock));
217 nandfs_free_entry(mdt, &req);
218 }
219
220 VOP_UNLOCK(NTOV(dat), 0);
221 return (error);
222 }
223
224 int
nandfs_get_dat_vinfo_ioctl(struct nandfs_device * nandfsdev,struct nandfs_argv * nargv)225 nandfs_get_dat_vinfo_ioctl(struct nandfs_device *nandfsdev, struct nandfs_argv *nargv)
226 {
227 struct nandfs_vinfo *vinfo;
228 size_t size;
229 int error;
230
231 if (nargv->nv_nmembs > NANDFS_VINFO_MAX)
232 return (EINVAL);
233
234 size = sizeof(struct nandfs_vinfo) * nargv->nv_nmembs;
235 vinfo = malloc(size, M_NANDFSTEMP, M_WAITOK|M_ZERO);
236
237 error = copyin((void *)(uintptr_t)nargv->nv_base, vinfo, size);
238 if (error) {
239 free(vinfo, M_NANDFSTEMP);
240 return (error);
241 }
242
243 error = nandfs_get_dat_vinfo(nandfsdev, vinfo, nargv->nv_nmembs);
244 if (error == 0)
245 error = copyout(vinfo, (void *)(uintptr_t)nargv->nv_base, size);
246 free(vinfo, M_NANDFSTEMP);
247 return (error);
248 }
249
250 int
nandfs_get_dat_vinfo(struct nandfs_device * nandfsdev,struct nandfs_vinfo * vinfo,uint32_t nmembs)251 nandfs_get_dat_vinfo(struct nandfs_device *nandfsdev, struct nandfs_vinfo *vinfo,
252 uint32_t nmembs)
253 {
254 struct nandfs_node *dat;
255 struct nandfs_mdt *mdt;
256 struct nandfs_alloc_request req;
257 struct nandfs_dat_entry *dat_entry;
258 uint32_t i, idx;
259 int error = 0;
260
261 dat = nandfsdev->nd_dat_node;
262 mdt = &nandfsdev->nd_dat_mdt;
263
264 DPRINTF(DAT, ("%s: nmembs %#x\n", __func__, nmembs));
265
266 VOP_LOCK(NTOV(dat), LK_EXCLUSIVE);
267
268 for (i = 0; i < nmembs; i++) {
269 req.entrynum = vinfo[i].nvi_vblocknr;
270
271 error = nandfs_get_entry_block(mdt, dat,&req, &idx, 0);
272 if (error)
273 break;
274
275 dat_entry = ((struct nandfs_dat_entry *) req.bp_entry->b_data);
276 vinfo[i].nvi_start = dat_entry[idx].de_start;
277 vinfo[i].nvi_end = dat_entry[idx].de_end;
278 vinfo[i].nvi_blocknr = dat_entry[idx].de_blocknr;
279
280 DPRINTF(DAT, ("%s: vinfo: %jx[%jx-%jx]->%jx\n",
281 __func__, vinfo[i].nvi_vblocknr, vinfo[i].nvi_start,
282 vinfo[i].nvi_end, vinfo[i].nvi_blocknr));
283
284 brelse(req.bp_entry);
285 }
286
287 VOP_UNLOCK(NTOV(dat), 0);
288 return (error);
289 }
290
291 int
nandfs_get_dat_bdescs_ioctl(struct nandfs_device * nffsdev,struct nandfs_argv * nargv)292 nandfs_get_dat_bdescs_ioctl(struct nandfs_device *nffsdev,
293 struct nandfs_argv *nargv)
294 {
295 struct nandfs_bdesc *bd;
296 size_t size;
297 int error;
298
299 size = nargv->nv_nmembs * sizeof(struct nandfs_bdesc);
300 bd = malloc(size, M_NANDFSTEMP, M_WAITOK);
301 error = copyin((void *)(uintptr_t)nargv->nv_base, bd, size);
302 if (error) {
303 free(bd, M_NANDFSTEMP);
304 return (error);
305 }
306
307 error = nandfs_get_dat_bdescs(nffsdev, bd, nargv->nv_nmembs);
308
309 if (error == 0)
310 error = copyout(bd, (void *)(uintptr_t)nargv->nv_base, size);
311
312 free(bd, M_NANDFSTEMP);
313 return (error);
314 }
315
316 int
nandfs_get_dat_bdescs(struct nandfs_device * nffsdev,struct nandfs_bdesc * bd,uint32_t nmembs)317 nandfs_get_dat_bdescs(struct nandfs_device *nffsdev, struct nandfs_bdesc *bd,
318 uint32_t nmembs)
319 {
320 struct nandfs_node *dat_node;
321 uint64_t map;
322 uint32_t i;
323 int error = 0;
324
325 dat_node = nffsdev->nd_dat_node;
326
327 VOP_LOCK(NTOV(dat_node), LK_EXCLUSIVE);
328
329 for (i = 0; i < nmembs; i++) {
330 DPRINTF(CLEAN,
331 ("%s: bd ino:%#jx oblk:%#jx blocknr:%#jx off:%#jx\n",
332 __func__, (uintmax_t)bd[i].bd_ino,
333 (uintmax_t)bd[i].bd_oblocknr, (uintmax_t)bd[i].bd_blocknr,
334 (uintmax_t)bd[i].bd_offset));
335
336 error = nandfs_bmap_lookup(dat_node, bd[i].bd_offset, &map);
337 if (error)
338 break;
339 bd[i].bd_blocknr = map;
340 }
341
342 VOP_UNLOCK(NTOV(dat_node), 0);
343 return (error);
344 }
345