1 /* $NetBSD: filecore_node.c,v 1.31 2017/05/26 14:34:19 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1994 5 * The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * filecore_node.c 1.0 1998/6/4 33 */ 34 35 /*- 36 * Copyright (c) 1998 Andrew McMurry 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the University of 49 * California, Berkeley and its contributors. 50 * 4. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * filecore_node.c 1.0 1998/6/4 67 */ 68 69 #include <sys/cdefs.h> 70 __KERNEL_RCSID(0, "$NetBSD: filecore_node.c,v 1.31 2017/05/26 14:34:19 riastradh Exp $"); 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/mount.h> 75 #include <sys/proc.h> 76 #include <sys/file.h> 77 #include <sys/buf.h> 78 #include <sys/vnode.h> 79 #include <sys/namei.h> 80 #include <sys/kernel.h> 81 #include <sys/pool.h> 82 #include <sys/stat.h> 83 #include <sys/mutex.h> 84 85 #include <fs/filecorefs/filecore.h> 86 #include <fs/filecorefs/filecore_extern.h> 87 #include <fs/filecorefs/filecore_node.h> 88 #include <fs/filecorefs/filecore_mount.h> 89 90 struct pool filecore_node_pool; 91 92 static const struct genfs_ops filecore_genfsops = { 93 .gop_size = genfs_size, 94 }; 95 96 /* 97 * Initialize hash links for inodes and dnodes. 98 */ 99 void 100 filecore_init(void) 101 { 102 103 pool_init(&filecore_node_pool, sizeof(struct filecore_node), 0, 0, 0, 104 "filecrnopl", &pool_allocator_nointr, IPL_NONE); 105 } 106 107 /* 108 * Reinitialize inode hash table. 109 */ 110 void 111 filecore_reinit(void) 112 { 113 114 } 115 116 /* 117 * Destroy node pool and hash table. 118 */ 119 void 120 filecore_done(void) 121 { 122 123 pool_destroy(&filecore_node_pool); 124 } 125 126 /* 127 * Initialize this vnode / filecore node pair. 128 * Caller assures no other thread will try to load this node. 129 */ 130 int 131 filecore_loadvnode(struct mount *mp, struct vnode *vp, 132 const void *key, size_t key_len, const void **new_key) 133 { 134 ino_t ino; 135 struct filecore_mnt *fcmp; 136 struct filecore_node *ip; 137 struct buf *bp; 138 int error; 139 140 KASSERT(key_len == sizeof(ino)); 141 memcpy(&ino, key, key_len); 142 fcmp = VFSTOFILECORE(mp); 143 144 ip = pool_get(&filecore_node_pool, PR_WAITOK); 145 memset(ip, 0, sizeof(struct filecore_node)); 146 ip->i_vnode = vp; 147 ip->i_dev = fcmp->fc_dev; 148 ip->i_number = ino; 149 ip->i_block = -1; 150 ip->i_parent = -2; 151 152 if (ino == FILECORE_ROOTINO) { 153 /* Here we need to construct a root directory inode */ 154 memcpy(ip->i_dirent.name, "root", 4); 155 ip->i_dirent.load = 0; 156 ip->i_dirent.exec = 0; 157 ip->i_dirent.len = FILECORE_DIR_SIZE; 158 ip->i_dirent.addr = fcmp->drec.root; 159 ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; 160 161 } else { 162 /* Read in Data from Directory Entry */ 163 if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, 164 FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { 165 pool_put(&filecore_node_pool, ip); 166 return error; 167 } 168 169 memcpy(&ip->i_dirent, 170 fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), 171 sizeof(struct filecore_direntry)); 172 #ifdef FILECORE_DEBUG_BR 173 printf("brelse(%p) vf5\n", bp); 174 #endif 175 brelse(bp, 0); 176 } 177 178 ip->i_mnt = fcmp; 179 ip->i_devvp = fcmp->fc_devvp; 180 ip->i_diroff = 0; 181 vref(ip->i_devvp); 182 183 /* 184 * Initialize the associated vnode 185 */ 186 187 vp->v_tag = VT_FILECORE; 188 vp->v_op = filecore_vnodeop_p; 189 vp->v_data = ip; 190 if (ip->i_dirent.attr & FILECORE_ATTR_DIR) 191 vp->v_type = VDIR; 192 else 193 vp->v_type = VREG; 194 if (ino == FILECORE_ROOTINO) 195 vp->v_vflag |= VV_ROOT; 196 genfs_node_init(vp, &filecore_genfsops); 197 198 /* 199 * XXX need generation number? 200 */ 201 202 uvm_vnp_setsize(vp, ip->i_size); 203 *new_key = &ip->i_number; 204 return 0; 205 } 206 207 /* 208 * Last reference to an inode, write the inode out and if necessary, 209 * truncate and deallocate the file. 210 */ 211 int 212 filecore_inactive(void *v) 213 { 214 struct vop_inactive_v2_args /* { 215 struct vnode *a_vp; 216 bool *a_recycle; 217 } */ *ap = v; 218 struct vnode *vp = ap->a_vp; 219 struct filecore_node *ip = VTOI(vp); 220 int error = 0; 221 222 /* 223 * If we are done with the inode, reclaim it 224 * so that it can be reused immediately. 225 */ 226 ip->i_flag = 0; 227 *ap->a_recycle = (filecore_staleinode(ip) != 0); 228 229 return error; 230 } 231 232 /* 233 * Reclaim an inode so that it can be used for other purposes. 234 */ 235 int 236 filecore_reclaim(void *v) 237 { 238 struct vop_reclaim_v2_args /* { 239 struct vnode *a_vp; 240 struct lwp *a_l; 241 } */ *ap = v; 242 struct vnode *vp = ap->a_vp; 243 struct filecore_node *ip = VTOI(vp); 244 245 VOP_UNLOCK(vp); 246 247 /* 248 * Purge old data structures associated with the inode. 249 */ 250 if (ip->i_devvp) { 251 vrele(ip->i_devvp); 252 ip->i_devvp = 0; 253 } 254 genfs_node_destroy(vp); 255 pool_put(&filecore_node_pool, vp->v_data); 256 vp->v_data = NULL; 257 return (0); 258 } 259
Indexes created Sat Sep 20 22:09:52 GMT 2025