/* $NetBSD: filecore_node.c,v 1.31 2017/05/26 14:34:19 riastradh Exp $ */ /*- * Copyright (c) 1982, 1986, 1989, 1994 * The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * filecore_node.c 1.0 1998/6/4 */ /*- * Copyright (c) 1998 Andrew McMurry * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * filecore_node.c 1.0 1998/6/4 */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: filecore_node.c,v 1.31 2017/05/26 14:34:19 riastradh Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/mount.h> #include <sys/proc.h> #include <sys/file.h> #include <sys/buf.h> #include <sys/vnode.h> #include <sys/namei.h> #include <sys/kernel.h> #include <sys/pool.h> #include <sys/stat.h> #include <sys/mutex.h> #include <fs/filecorefs/filecore.h> #include <fs/filecorefs/filecore_extern.h> #include <fs/filecorefs/filecore_node.h> #include <fs/filecorefs/filecore_mount.h> struct pool filecore_node_pool; static const struct genfs_ops filecore_genfsops = { .gop_size = genfs_size, }; /* * Initialize hash links for inodes and dnodes. */ void filecore_init(void) { pool_init(&filecore_node_pool, sizeof(struct filecore_node), 0, 0, 0, "filecrnopl", &pool_allocator_nointr, IPL_NONE); } /* * Reinitialize inode hash table. */ void filecore_reinit(void) { } /* * Destroy node pool and hash table. */ void filecore_done(void) { pool_destroy(&filecore_node_pool); } /* * Initialize this vnode / filecore node pair. * Caller assures no other thread will try to load this node. */ int filecore_loadvnode(struct mount *mp, struct vnode *vp, const void *key, size_t key_len, const void **new_key) { ino_t ino; struct filecore_mnt *fcmp; struct filecore_node *ip; struct buf *bp; int error; KASSERT(key_len == sizeof(ino)); memcpy(&ino, key, key_len); fcmp = VFSTOFILECORE(mp); ip = pool_get(&filecore_node_pool, PR_WAITOK); memset(ip, 0, sizeof(struct filecore_node)); ip->i_vnode = vp; ip->i_dev = fcmp->fc_dev; ip->i_number = ino; ip->i_block = -1; ip->i_parent = -2; if (ino == FILECORE_ROOTINO) { /* Here we need to construct a root directory inode */ memcpy(ip->i_dirent.name, "root", 4); ip->i_dirent.load = 0; ip->i_dirent.exec = 0; ip->i_dirent.len = FILECORE_DIR_SIZE; ip->i_dirent.addr = fcmp->drec.root; ip->i_dirent.attr = FILECORE_ATTR_DIR | FILECORE_ATTR_READ; } else { /* Read in Data from Directory Entry */ if ((error = filecore_bread(fcmp, ino & FILECORE_INO_MASK, FILECORE_DIR_SIZE, NOCRED, &bp)) != 0) { pool_put(&filecore_node_pool, ip); return error; } memcpy(&ip->i_dirent, fcdirentry(bp->b_data, ino >> FILECORE_INO_INDEX), sizeof(struct filecore_direntry)); #ifdef FILECORE_DEBUG_BR printf("brelse(%p) vf5\n", bp); #endif brelse(bp, 0); } ip->i_mnt = fcmp; ip->i_devvp = fcmp->fc_devvp; ip->i_diroff = 0; vref(ip->i_devvp); /* * Initialize the associated vnode */ vp->v_tag = VT_FILECORE; vp->v_op = filecore_vnodeop_p; vp->v_data = ip; if (ip->i_dirent.attr & FILECORE_ATTR_DIR) vp->v_type = VDIR; else vp->v_type = VREG; if (ino == FILECORE_ROOTINO) vp->v_vflag |= VV_ROOT; genfs_node_init(vp, &filecore_genfsops); /* * XXX need generation number? */ uvm_vnp_setsize(vp, ip->i_size); *new_key = &ip->i_number; return 0; } /* * Last reference to an inode, write the inode out and if necessary, * truncate and deallocate the file. */ int filecore_inactive(void *v) { struct vop_inactive_v2_args /* { struct vnode *a_vp; bool *a_recycle; } */ *ap = v; struct vnode *vp = ap->a_vp; struct filecore_node *ip = VTOI(vp); int error = 0; /* * If we are done with the inode, reclaim it * so that it can be reused immediately. */ ip->i_flag = 0; *ap->a_recycle = (filecore_staleinode(ip) != 0); return error; } /* * Reclaim an inode so that it can be used for other purposes. */ int filecore_reclaim(void *v) { struct vop_reclaim_v2_args /* { struct vnode *a_vp; struct lwp *a_l; } */ *ap = v; struct vnode *vp = ap->a_vp; struct filecore_node *ip = VTOI(vp); VOP_UNLOCK(vp); /* * Purge old data structures associated with the inode. */ if (ip->i_devvp) { vrele(ip->i_devvp); ip->i_devvp = 0; } genfs_node_destroy(vp); pool_put(&filecore_node_pool, vp->v_data); vp->v_data = NULL; return (0); }
