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_ifile.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_node_create(struct nandfsmount * nmp,struct nandfs_node ** node,uint16_t mode)54 nandfs_node_create(struct nandfsmount *nmp, struct nandfs_node **node,
55 uint16_t mode)
56 {
57 struct nandfs_alloc_request req;
58 struct nandfs_device *nandfsdev;
59 struct nandfs_mdt *mdt;
60 struct nandfs_node *ifile;
61 struct nandfs_inode *inode;
62 struct vnode *vp;
63 uint32_t entry;
64 int error = 0;
65
66 nandfsdev = nmp->nm_nandfsdev;
67 mdt = &nandfsdev->nd_ifile_mdt;
68 ifile = nmp->nm_ifile_node;
69 vp = NTOV(ifile);
70
71 VOP_LOCK(vp, LK_EXCLUSIVE);
72 /* Allocate new inode in ifile */
73 req.entrynum = nandfsdev->nd_last_ino + 1;
74 error = nandfs_find_free_entry(mdt, ifile, &req);
75 if (error) {
76 VOP_UNLOCK(vp, 0);
77 return (error);
78 }
79
80 error = nandfs_get_entry_block(mdt, ifile, &req, &entry, 1);
81 if (error) {
82 VOP_UNLOCK(vp, 0);
83 return (error);
84 }
85
86 /* Inode initialization */
87 inode = ((struct nandfs_inode *) req.bp_entry->b_data) + entry;
88 nandfs_inode_init(inode, mode);
89
90 error = nandfs_alloc_entry(mdt, &req);
91 if (error) {
92 VOP_UNLOCK(vp, 0);
93 return (error);
94 }
95
96 VOP_UNLOCK(vp, 0);
97
98 nandfsdev->nd_last_ino = req.entrynum;
99 error = nandfs_get_node(nmp, req.entrynum, node);
100 DPRINTF(IFILE, ("%s: node: %p ino: %#jx\n",
101 __func__, node, (uintmax_t)((*node)->nn_ino)));
102
103 return (error);
104 }
105
106 int
nandfs_node_destroy(struct nandfs_node * node)107 nandfs_node_destroy(struct nandfs_node *node)
108 {
109 struct nandfs_alloc_request req;
110 struct nandfsmount *nmp;
111 struct nandfs_mdt *mdt;
112 struct nandfs_node *ifile;
113 struct vnode *vp;
114 int error = 0;
115
116 nmp = node->nn_nmp;
117 req.entrynum = node->nn_ino;
118 mdt = &nmp->nm_nandfsdev->nd_ifile_mdt;
119 ifile = nmp->nm_ifile_node;
120 vp = NTOV(ifile);
121
122 DPRINTF(IFILE, ("%s: destroy node: %p ino: %#jx\n",
123 __func__, node, (uintmax_t)node->nn_ino));
124 VOP_LOCK(vp, LK_EXCLUSIVE);
125
126 error = nandfs_find_entry(mdt, ifile, &req);
127 if (error) {
128 nandfs_error("%s: finding entry error:%d node %p(%jx)",
129 __func__, error, node, node->nn_ino);
130 VOP_UNLOCK(vp, 0);
131 return (error);
132 }
133
134 nandfs_inode_destroy(&node->nn_inode);
135
136 error = nandfs_free_entry(mdt, &req);
137 if (error) {
138 nandfs_error("%s: freing entry error:%d node %p(%jx)",
139 __func__, error, node, node->nn_ino);
140 VOP_UNLOCK(vp, 0);
141 return (error);
142 }
143
144 VOP_UNLOCK(vp, 0);
145 DPRINTF(IFILE, ("%s: freed node %p ino %#jx\n",
146 __func__, node, (uintmax_t)node->nn_ino));
147 return (error);
148 }
149
150 int
nandfs_node_update(struct nandfs_node * node)151 nandfs_node_update(struct nandfs_node *node)
152 {
153 struct nandfs_alloc_request req;
154 struct nandfsmount *nmp;
155 struct nandfs_mdt *mdt;
156 struct nandfs_node *ifile;
157 struct nandfs_inode *inode;
158 uint32_t index;
159 int error = 0;
160
161 nmp = node->nn_nmp;
162 ifile = nmp->nm_ifile_node;
163 ASSERT_VOP_LOCKED(NTOV(ifile), __func__);
164
165 req.entrynum = node->nn_ino;
166 mdt = &nmp->nm_nandfsdev->nd_ifile_mdt;
167
168 DPRINTF(IFILE, ("%s: node:%p ino:%#jx\n",
169 __func__, &node->nn_inode, (uintmax_t)node->nn_ino));
170
171 error = nandfs_get_entry_block(mdt, ifile, &req, &index, 0);
172 if (error) {
173 printf("nandfs_get_entry_block returned with ERROR=%d\n",
174 error);
175 return (error);
176 }
177
178 inode = ((struct nandfs_inode *) req.bp_entry->b_data) + index;
179 memcpy(inode, &node->nn_inode, sizeof(*inode));
180 error = nandfs_dirty_buf(req.bp_entry, 0);
181
182 return (error);
183 }
184
185 int
nandfs_get_node_entry(struct nandfsmount * nmp,struct nandfs_inode ** inode,uint64_t ino,struct buf ** bp)186 nandfs_get_node_entry(struct nandfsmount *nmp, struct nandfs_inode **inode,
187 uint64_t ino, struct buf **bp)
188 {
189 struct nandfs_alloc_request req;
190 struct nandfs_mdt *mdt;
191 struct nandfs_node *ifile;
192 struct vnode *vp;
193 uint32_t index;
194 int error = 0;
195
196 req.entrynum = ino;
197 mdt = &nmp->nm_nandfsdev->nd_ifile_mdt;
198 ifile = nmp->nm_ifile_node;
199 vp = NTOV(ifile);
200
201 VOP_LOCK(vp, LK_EXCLUSIVE);
202 error = nandfs_get_entry_block(mdt, ifile, &req, &index, 0);
203 if (error) {
204 VOP_UNLOCK(vp, 0);
205 return (error);
206 }
207
208 *inode = ((struct nandfs_inode *) req.bp_entry->b_data) + index;
209 *bp = req.bp_entry;
210 VOP_UNLOCK(vp, 0);
211 return (0);
212 }
213
214