--- /dev/null
+/* $NetBSD: kernfs_vnops.c,v 1.98.2.3 2004/05/15 13:35:27 tron Exp $ */
+
+/*
+ * Copyright (c) 1992, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software donated to Berkeley by
+ * Jan-Simon Pendry.
+ *
+ * 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.
+ *
+ * @(#)kernfs_vnops.c 8.15 (Berkeley) 5/21/95
+ */
+
+/*
+ * Kernel parameter filesystem (/kern)
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: kernfs_vnops.c,v 1.98.2.3 2004/05/15 13:35:27 tron Exp $");
+
+#ifdef _KERNEL_OPT
+#include "opt_ipsec.h"
+#endif
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/vmmeter.h>
+#include <sys/time.h>
+#include <sys/proc.h>
+#include <sys/vnode.h>
+#include <sys/malloc.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/mount.h>
+#include <sys/namei.h>
+#include <sys/buf.h>
+#include <sys/dirent.h>
+#include <sys/msgbuf.h>
+
+#include <miscfs/genfs/genfs.h>
+#include <miscfs/kernfs/kernfs.h>
+
+#ifdef IPSEC
+#include <sys/mbuf.h>
+#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet6/ipsec.h>
+#include <netkey/key.h>
+#endif
+
+#include <uvm/uvm_extern.h>
+
+#define KSTRING 256 /* Largest I/O available via this filesystem */
+#define UIO_MX 32
+
+#define READ_MODE (S_IRUSR|S_IRGRP|S_IROTH)
+#define WRITE_MODE (S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH)
+#define UREAD_MODE (S_IRUSR)
+#define DIR_MODE (S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
+#define UDIR_MODE (S_IRUSR|S_IXUSR)
+
+#define N(s) sizeof(s)-1, s
+const struct kern_target kern_targets[] = {
+/* NOTE: The name must be less than UIO_MX-16 chars in length */
+ /* name data tag type ro/rw */
+ { DT_DIR, N("."), 0, KFSkern, VDIR, DIR_MODE },
+ { DT_DIR, N(".."), 0, KFSroot, VDIR, DIR_MODE },
+ { DT_REG, N("boottime"), &boottime.tv_sec, KFSint, VREG, READ_MODE },
+ /* XXX cast away const */
+ { DT_REG, N("copyright"), (void *)copyright,
+ KFSstring, VREG, READ_MODE },
+ { DT_REG, N("hostname"), 0, KFShostname, VREG, WRITE_MODE },
+ { DT_REG, N("hz"), &hz, KFSint, VREG, READ_MODE },
+#ifdef IPSEC
+ { DT_DIR, N("ipsecsa"), 0, KFSipsecsadir, VDIR, UDIR_MODE },
+ { DT_DIR, N("ipsecsp"), 0, KFSipsecspdir, VDIR, UDIR_MODE },
+#endif
+ { DT_REG, N("loadavg"), 0, KFSavenrun, VREG, READ_MODE },
+ { DT_REG, N("msgbuf"), 0, KFSmsgbuf, VREG, READ_MODE },
+ { DT_REG, N("pagesize"), &uvmexp.pagesize, KFSint, VREG, READ_MODE },
+ { DT_REG, N("physmem"), &physmem, KFSint, VREG, READ_MODE },
+#if 0
+ { DT_DIR, N("root"), 0, KFSnull, VDIR, DIR_MODE },
+#endif
+ { DT_BLK, N("rootdev"), &rootdev, KFSdevice, VBLK, READ_MODE },
+ { DT_CHR, N("rrootdev"), &rrootdev, KFSdevice, VCHR, READ_MODE },
+ { DT_REG, N("time"), 0, KFStime, VREG, READ_MODE },
+ /* XXX cast away const */
+ { DT_REG, N("version"), (void *)version,
+ KFSstring, VREG, READ_MODE },
+};
+const struct kern_target subdir_targets[] = {
+/* NOTE: The name must be less than UIO_MX-16 chars in length */
+ /* name data tag type ro/rw */
+ { DT_DIR, N("."), 0, KFSsubdir, VDIR, DIR_MODE },
+ { DT_DIR, N(".."), 0, KFSkern, VDIR, DIR_MODE },
+};
+#ifdef IPSEC
+const struct kern_target ipsecsa_targets[] = {
+/* NOTE: The name must be less than UIO_MX-16 chars in length */
+ /* name data tag type ro/rw */
+ { DT_DIR, N("."), 0, KFSipsecsadir, VDIR, DIR_MODE },
+ { DT_DIR, N(".."), 0, KFSkern, VDIR, DIR_MODE },
+};
+const struct kern_target ipsecsp_targets[] = {
+/* NOTE: The name must be less than UIO_MX-16 chars in length */
+ /* name data tag type ro/rw */
+ { DT_DIR, N("."), 0, KFSipsecspdir, VDIR, DIR_MODE },
+ { DT_DIR, N(".."), 0, KFSkern, VDIR, DIR_MODE },
+};
+const struct kern_target ipsecsa_kt =
+ { DT_DIR, N(""), 0, KFSipsecsa, VREG, UREAD_MODE };
+const struct kern_target ipsecsp_kt =
+ { DT_DIR, N(""), 0, KFSipsecsp, VREG, UREAD_MODE };
+#endif
+#undef N
+SIMPLEQ_HEAD(,dyn_kern_target) dyn_kern_targets =
+ SIMPLEQ_HEAD_INITIALIZER(dyn_kern_targets);
+int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]);
+const int static_nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]);
+#ifdef IPSEC
+int nipsecsa_targets = sizeof(ipsecsa_targets) / sizeof(ipsecsa_targets[0]);
+int nipsecsp_targets = sizeof(ipsecsp_targets) / sizeof(ipsecsp_targets[0]);
+int nkern_dirs = 4; /* 2 extra subdirs */
+#else
+int nkern_dirs = 2;
+#endif
+
+int kernfs_try_fileop(kfstype, kfsfileop, void *, int);
+int kernfs_try_xread(kfstype, const struct kernfs_node *, int, char **,
+ size_t, size_t *, int);
+int kernfs_try_xwrite(kfstype, const struct kernfs_node *, char *,
+ size_t, int);
+
+static int kernfs_default_xread(void *v);
+static int kernfs_default_xwrite(void *v);
+static int kernfs_default_fileop_getattr(void *);
+
+/* must include all fileop's */
+const struct kernfs_fileop kernfs_default_fileops[] = {
+ { .kf_fileop = KERNFS_XREAD },
+ { .kf_fileop = KERNFS_XWRITE },
+ { .kf_fileop = KERNFS_FILEOP_OPEN },
+ { .kf_fileop = KERNFS_FILEOP_GETATTR,
+ .kf_genop = {kernfs_default_fileop_getattr} },
+ { .kf_fileop = KERNFS_FILEOP_IOCTL },
+ { .kf_fileop = KERNFS_FILEOP_MMAP },
+ { .kf_fileop = KERNFS_FILEOP_CLOSE },
+ { .kf_fileop = KERNFS_FILEOP_READ, .kf_genop = {kernfs_default_xread} },
+ { .kf_fileop = KERNFS_FILEOP_WRITE, .kf_genop = {kernfs_default_xwrite} },
+};
+
+int kernfs_lookup __P((void *));
+#define kernfs_create genfs_eopnotsupp
+#define kernfs_mknod genfs_eopnotsupp
+int kernfs_open __P((void *));
+int kernfs_close __P((void *));
+int kernfs_access __P((void *));
+int kernfs_getattr __P((void *));
+int kernfs_setattr __P((void *));
+int kernfs_read __P((void *));
+int kernfs_write __P((void *));
+#define kernfs_fcntl genfs_fcntl
+int kernfs_ioctl __P((void *));
+#define kernfs_poll genfs_poll
+#define kernfs_revoke genfs_revoke
+int kernfs_mmap __P((void *));
+#define kernfs_fsync genfs_nullop
+#define kernfs_seek genfs_nullop
+#define kernfs_remove genfs_eopnotsupp
+int kernfs_link __P((void *));
+#define kernfs_rename genfs_eopnotsupp
+#define kernfs_mkdir genfs_eopnotsupp
+#define kernfs_rmdir genfs_eopnotsupp
+int kernfs_symlink __P((void *));
+int kernfs_readdir __P((void *));
+#define kernfs_readlink genfs_eopnotsupp
+#define kernfs_abortop genfs_abortop
+int kernfs_inactive __P((void *));
+int kernfs_reclaim __P((void *));
+#define kernfs_lock genfs_lock
+#define kernfs_unlock genfs_unlock
+#define kernfs_bmap genfs_badop
+#define kernfs_strategy genfs_badop
+int kernfs_print __P((void *));
+#define kernfs_islocked genfs_islocked
+int kernfs_pathconf __P((void *));
+#define kernfs_advlock genfs_einval
+#define kernfs_blkatoff genfs_eopnotsupp
+#define kernfs_valloc genfs_eopnotsupp
+#define kernfs_vfree genfs_nullop
+#define kernfs_truncate genfs_eopnotsupp
+#define kernfs_update genfs_nullop
+#define kernfs_bwrite genfs_eopnotsupp
+#define kernfs_putpages genfs_putpages
+
+static int kernfs_xread __P((struct kernfs_node *, int, char **, size_t, size_t *));
+static int kernfs_xwrite __P((const struct kernfs_node *, char *, size_t));
+
+int (**kernfs_vnodeop_p) __P((void *));
+const struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = {
+ { &vop_default_desc, vn_default_error },
+ { &vop_lookup_desc, kernfs_lookup }, /* lookup */
+ { &vop_create_desc, kernfs_create }, /* create */
+ { &vop_mknod_desc, kernfs_mknod }, /* mknod */
+ { &vop_open_desc, kernfs_open }, /* open */
+ { &vop_close_desc, kernfs_close }, /* close */
+ { &vop_access_desc, kernfs_access }, /* access */
+ { &vop_getattr_desc, kernfs_getattr }, /* getattr */
+ { &vop_setattr_desc, kernfs_setattr }, /* setattr */
+ { &vop_read_desc, kernfs_read }, /* read */
+ { &vop_write_desc, kernfs_write }, /* write */
+ { &vop_fcntl_desc, kernfs_fcntl }, /* fcntl */
+ { &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */
+ { &vop_poll_desc, kernfs_poll }, /* poll */
+ { &vop_revoke_desc, kernfs_revoke }, /* revoke */
+ { &vop_mmap_desc, kernfs_mmap }, /* mmap */
+ { &vop_fsync_desc, kernfs_fsync }, /* fsync */
+ { &vop_seek_desc, kernfs_seek }, /* seek */
+ { &vop_remove_desc, kernfs_remove }, /* remove */
+ { &vop_link_desc, kernfs_link }, /* link */
+ { &vop_rename_desc, kernfs_rename }, /* rename */
+ { &vop_mkdir_desc, kernfs_mkdir }, /* mkdir */
+ { &vop_rmdir_desc, kernfs_rmdir }, /* rmdir */
+ { &vop_symlink_desc, kernfs_symlink }, /* symlink */
+ { &vop_readdir_desc, kernfs_readdir }, /* readdir */
+ { &vop_readlink_desc, kernfs_readlink }, /* readlink */
+ { &vop_abortop_desc, kernfs_abortop }, /* abortop */
+ { &vop_inactive_desc, kernfs_inactive }, /* inactive */
+ { &vop_reclaim_desc, kernfs_reclaim }, /* reclaim */
+ { &vop_lock_desc, kernfs_lock }, /* lock */
+ { &vop_unlock_desc, kernfs_unlock }, /* unlock */
+ { &vop_bmap_desc, kernfs_bmap }, /* bmap */
+ { &vop_strategy_desc, kernfs_strategy }, /* strategy */
+ { &vop_print_desc, kernfs_print }, /* print */
+ { &vop_islocked_desc, kernfs_islocked }, /* islocked */
+ { &vop_pathconf_desc, kernfs_pathconf }, /* pathconf */
+ { &vop_advlock_desc, kernfs_advlock }, /* advlock */
+ { &vop_blkatoff_desc, kernfs_blkatoff }, /* blkatoff */
+ { &vop_valloc_desc, kernfs_valloc }, /* valloc */
+ { &vop_vfree_desc, kernfs_vfree }, /* vfree */
+ { &vop_truncate_desc, kernfs_truncate }, /* truncate */
+ { &vop_update_desc, kernfs_update }, /* update */
+ { &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */
+ { &vop_putpages_desc, kernfs_putpages }, /* putpages */
+ { NULL, NULL }
+};
+const struct vnodeopv_desc kernfs_vnodeop_opv_desc =
+ { &kernfs_vnodeop_p, kernfs_vnodeop_entries };
+
+static __inline int
+kernfs_fileop_compare(struct kernfs_fileop *a, struct kernfs_fileop *b)
+{
+ if (a->kf_type < b->kf_type)
+ return -1;
+ if (a->kf_type > b->kf_type)
+ return 1;
+ if (a->kf_fileop < b->kf_fileop)
+ return -1;
+ if (a->kf_fileop > b->kf_fileop)
+ return 1;
+ return (0);
+}
+
+SPLAY_HEAD(kfsfileoptree, kernfs_fileop) kfsfileoptree =
+ SPLAY_INITIALIZER(kfsfileoptree);
+SPLAY_PROTOTYPE(kfsfileoptree, kernfs_fileop, kf_node, kernfs_fileop_compare);
+SPLAY_GENERATE(kfsfileoptree, kernfs_fileop, kf_node, kernfs_fileop_compare);
+
+kfstype
+kernfs_alloctype(int nkf, const struct kernfs_fileop *kf)
+{
+ static u_char nextfreetype = KFSlasttype;
+ struct kernfs_fileop *dkf, *fkf, skf;
+ int i;
+
+ /* XXX need to keep track of dkf's memory if we support
+ deallocating types */
+ dkf = malloc(sizeof(kernfs_default_fileops), M_TEMP, M_WAITOK);
+ memcpy(dkf, kernfs_default_fileops, sizeof(kernfs_default_fileops));
+
+ for (i = 0; i < sizeof(kernfs_default_fileops) /
+ sizeof(kernfs_default_fileops[0]); i++) {
+ dkf[i].kf_type = nextfreetype;
+ SPLAY_INSERT(kfsfileoptree, &kfsfileoptree, &dkf[i]);
+ }
+
+ for (i = 0; i < nkf; i++) {
+ skf.kf_type = nextfreetype;
+ skf.kf_fileop = kf[i].kf_fileop;
+ if ((fkf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf)))
+ fkf->kf_genop = kf[i].kf_genop;
+ }
+
+ return nextfreetype++;
+}
+
+int
+kernfs_try_fileop(kfstype type, kfsfileop fileop, void *v, int error)
+{
+ const struct kernfs_fileop *kf;
+ struct kernfs_fileop skf;
+
+ skf.kf_type = type;
+ skf.kf_fileop = fileop;
+ kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf);
+ if (kf == NULL)
+ kf = &kernfs_default_fileops[fileop];
+ if (kf->kf_vop)
+ return kf->kf_vop(v);
+ return error;
+}
+
+int
+kernfs_try_xread(kfstype type, const struct kernfs_node *kfs, int off,
+ char **bufp, size_t len, size_t *wrlen, int error)
+{
+ const struct kernfs_fileop *kf;
+ struct kernfs_fileop skf;
+
+ skf.kf_type = type;
+ skf.kf_fileop = KERNFS_XREAD;
+ kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf);
+ if (kf == NULL)
+ kf = &kernfs_default_fileops[KERNFS_XREAD];
+ if (kf->kf_xread)
+ return kf->kf_xread(kfs, off, bufp, len, wrlen);
+ *wrlen = 0;
+ return error;
+}
+
+int
+kernfs_try_xwrite(kfstype type, const struct kernfs_node *kfs, char *buf,
+ size_t len, int error)
+{
+ const struct kernfs_fileop *kf;
+ struct kernfs_fileop skf;
+
+ skf.kf_type = type;
+ skf.kf_fileop = KERNFS_XWRITE;
+ kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf);
+ if (kf == NULL)
+ kf = &kernfs_default_fileops[KERNFS_XWRITE];
+ if (kf->kf_xwrite)
+ return kf->kf_xwrite(kfs, buf, len);
+ return error;
+}
+
+int
+kernfs_addentry(kernfs_parentdir_t *pkt, kernfs_entry_t *dkt)
+{
+ struct kernfs_subdir *ks, *parent;
+
+ if (pkt == NULL) {
+ SIMPLEQ_INSERT_TAIL(&dyn_kern_targets, dkt, dkt_queue);
+ nkern_targets++;
+ if (dkt->dkt_kt.kt_vtype == VDIR)
+ nkern_dirs++;
+ } else {
+ parent = (struct kernfs_subdir *)pkt->kt_data;
+ SIMPLEQ_INSERT_TAIL(&parent->ks_entries, dkt, dkt_queue);
+ parent->ks_nentries++;
+ if (dkt->dkt_kt.kt_vtype == VDIR)
+ parent->ks_dirs++;
+ }
+ if (dkt->dkt_kt.kt_vtype == VDIR && dkt->dkt_kt.kt_data == NULL) {
+ ks = malloc(sizeof(struct kernfs_subdir),
+ M_TEMP, M_WAITOK);
+ SIMPLEQ_INIT(&ks->ks_entries);
+ ks->ks_nentries = 2; /* . and .. */
+ ks->ks_dirs = 2;
+ ks->ks_parent = pkt ? pkt : &kern_targets[0];
+ dkt->dkt_kt.kt_data = ks;
+ }
+ return 0;
+}
+
+static int
+kernfs_xread(kfs, off, bufp, len, wrlen)
+ struct kernfs_node *kfs;
+ int off;
+ char **bufp;
+ size_t len;
+ size_t *wrlen;
+{
+ const struct kern_target *kt;
+#ifdef IPSEC
+ struct mbuf *m;
+#endif
+
+ kt = kfs->kfs_kt;
+
+ switch (kfs->kfs_type) {
+ case KFStime: {
+ struct timeval tv;
+
+ microtime(&tv);
+ snprintf(*bufp, len, "%ld %ld\n", tv.tv_sec, tv.tv_usec);
+ break;
+ }
+
+ case KFSint: {
+ int *ip = kt->kt_data;
+
+ snprintf(*bufp, len, "%d\n", *ip);
+ break;
+ }
+
+ case KFSstring: {
+ char *cp = kt->kt_data;
+
+ *bufp = cp;
+ break;
+ }
+
+ case KFSmsgbuf: {
+ long n;
+
+ /*
+ * deal with cases where the message buffer has
+ * become corrupted.
+ */
+ if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) {
+ msgbufenabled = 0;
+ return (ENXIO);
+ }
+
+ /*
+ * Note that reads of /kern/msgbuf won't necessarily yield
+ * consistent results, if the message buffer is modified
+ * while the read is in progress. The worst that can happen
+ * is that incorrect data will be read. There's no way
+ * that this can crash the system unless the values in the
+ * message buffer header are corrupted, but that'll cause
+ * the system to die anyway.
+ */
+ if (off >= msgbufp->msg_bufs) {
+ *wrlen = 0;
+ return (0);
+ }
+ n = msgbufp->msg_bufx + off;
+ if (n >= msgbufp->msg_bufs)
+ n -= msgbufp->msg_bufs;
+ len = min(msgbufp->msg_bufs - n, msgbufp->msg_bufs - off);
+ *bufp = msgbufp->msg_bufc + n;
+ *wrlen = len;
+ return (0);
+ }
+
+ case KFShostname: {
+ char *cp = hostname;
+ int xlen = hostnamelen;
+
+ if (xlen >= (len - 2))
+ return (EINVAL);
+
+ memcpy(*bufp, cp, xlen);
+ (*bufp)[xlen] = '\n';
+ (*bufp)[xlen+1] = '\0';
+ len = strlen(*bufp);
+ break;
+ }
+
+ case KFSavenrun:
+ averunnable.fscale = FSCALE;
+ snprintf(*bufp, len, "%d %d %d %ld\n",
+ averunnable.ldavg[0], averunnable.ldavg[1],
+ averunnable.ldavg[2], averunnable.fscale);
+ break;
+
+#ifdef IPSEC
+ case KFSipsecsa:
+ /*
+ * Note that SA configuration could be changed during the
+ * read operation, resulting in garbled output.
+ */
+ m = key_setdumpsa_spi(htonl(kfs->kfs_value));
+ if (!m)
+ return (ENOBUFS);
+ if (off >= m->m_pkthdr.len) {
+ *wrlen = 0;
+ m_freem(m);
+ return (0);
+ }
+ if (len > m->m_pkthdr.len - off)
+ len = m->m_pkthdr.len - off;
+ m_copydata(m, off, len, *bufp);
+ *wrlen = len;
+ m_freem(m);
+ return (0);
+
+ case KFSipsecsp:
+ /*
+ * Note that SP configuration could be changed during the
+ * read operation, resulting in garbled output.
+ */
+ if (!kfs->kfs_v) {
+ struct secpolicy *sp;
+
+ sp = key_getspbyid(kfs->kfs_value);
+ if (sp)
+ kfs->kfs_v = sp;
+ else
+ return (ENOENT);
+ }
+ m = key_setdumpsp((struct secpolicy *)kfs->kfs_v,
+ SADB_X_SPDGET, 0, 0);
+ if (!m)
+ return (ENOBUFS);
+ if (off >= m->m_pkthdr.len) {
+ *wrlen = 0;
+ m_freem(m);
+ return (0);
+ }
+ if (len > m->m_pkthdr.len - off)
+ len = m->m_pkthdr.len - off;
+ m_copydata(m, off, len, *bufp);
+ *wrlen = len;
+ m_freem(m);
+ return (0);
+#endif
+
+ default:
+ return kernfs_try_xread(kfs->kfs_type, kfs, off, bufp, len,
+ wrlen, 0);
+ }
+
+ len = strlen(*bufp);
+ if (len <= off)
+ *wrlen = 0;
+ else {
+ *bufp += off;
+ *wrlen = len - off;
+ }
+ return (0);
+}
+
+static int
+kernfs_xwrite(kfs, buf, len)
+ const struct kernfs_node *kfs;
+ char *buf;
+ size_t len;
+{
+
+ switch (kfs->kfs_type) {
+ case KFShostname:
+ if (buf[len-1] == '\n')
+ --len;
+ memcpy(hostname, buf, len);
+ hostname[len] = '\0';
+ hostnamelen = (size_t) len;
+ return (0);
+
+ default:
+ return kernfs_try_xwrite(kfs->kfs_type, kfs, buf, len, EIO);
+ }
+}
+
+
+/*
+ * vp is the current namei directory
+ * ndp is the name to locate in that directory...
+ */
+int
+kernfs_lookup(v)
+ void *v;
+{
+ struct vop_lookup_args /* {
+ struct vnode * a_dvp;
+ struct vnode ** a_vpp;
+ struct componentname * a_cnp;
+ } */ *ap = v;
+ struct componentname *cnp = ap->a_cnp;
+ struct vnode **vpp = ap->a_vpp;
+ struct vnode *dvp = ap->a_dvp;
+ const char *pname = cnp->cn_nameptr;
+ const struct kernfs_node *kfs;
+ const struct kern_target *kt;
+ const struct dyn_kern_target *dkt;
+ const struct kernfs_subdir *ks;
+ int error, i, wantpunlock;
+#ifdef IPSEC
+ char *ep;
+ u_int32_t id;
+#endif
+
+ *vpp = NULLVP;
+ cnp->cn_flags &= ~PDIRUNLOCK;
+
+ if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)
+ return (EROFS);
+
+ if (cnp->cn_namelen == 1 && *pname == '.') {
+ *vpp = dvp;
+ VREF(dvp);
+ return (0);
+ }
+
+ wantpunlock = (~cnp->cn_flags & (LOCKPARENT | ISLASTCN));
+ kfs = VTOKERN(dvp);
+ switch (kfs->kfs_type) {
+ case KFSkern:
+ /*
+ * Shouldn't get here with .. in the root node.
+ */
+ if (cnp->cn_flags & ISDOTDOT)
+ return (EIO);
+
+ for (i = 0; i < static_nkern_targets; i++) {
+ kt = &kern_targets[i];
+ if (cnp->cn_namelen == kt->kt_namlen &&
+ memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0)
+ goto found;
+ }
+ SIMPLEQ_FOREACH(dkt, &dyn_kern_targets, dkt_queue) {
+ if (cnp->cn_namelen == dkt->dkt_kt.kt_namlen &&
+ memcmp(dkt->dkt_kt.kt_name, pname, cnp->cn_namelen) == 0) {
+ kt = &dkt->dkt_kt;
+ goto found;
+ }
+ }
+ break;
+
+ found:
+ error = kernfs_allocvp(dvp->v_mount, vpp, kt->kt_tag, kt, 0);
+ if ((error == 0) && wantpunlock) {
+ VOP_UNLOCK(dvp, 0);
+ cnp->cn_flags |= PDIRUNLOCK;
+ }
+ return (error);
+
+ case KFSsubdir:
+ ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data;
+ if (cnp->cn_flags & ISDOTDOT) {
+ kt = ks->ks_parent;
+ goto found;
+ }
+
+ SIMPLEQ_FOREACH(dkt, &ks->ks_entries, dkt_queue) {
+ if (cnp->cn_namelen == dkt->dkt_kt.kt_namlen &&
+ memcmp(dkt->dkt_kt.kt_name, pname, cnp->cn_namelen) == 0) {
+ kt = &dkt->dkt_kt;
+ goto found;
+ }
+ }
+ break;
+
+#ifdef IPSEC
+ case KFSipsecsadir:
+ if (cnp->cn_flags & ISDOTDOT) {
+ kt = &kern_targets[0];
+ goto found;
+ }
+
+ for (i = 2; i < nipsecsa_targets; i++) {
+ kt = &ipsecsa_targets[i];
+ if (cnp->cn_namelen == kt->kt_namlen &&
+ memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0)
+ goto found;
+ }
+
+ ep = NULL;
+ id = strtoul(pname, &ep, 10);
+ if (!ep || *ep || ep == pname)
+ break;
+
+ error = kernfs_allocvp(dvp->v_mount, vpp, KFSipsecsa, &ipsecsa_kt, id);
+ if ((error == 0) && wantpunlock) {
+ VOP_UNLOCK(dvp, 0);
+ cnp->cn_flags |= PDIRUNLOCK;
+ }
+ return (error);
+
+ case KFSipsecspdir:
+ if (cnp->cn_flags & ISDOTDOT) {
+ kt = &kern_targets[0];
+ goto found;
+ }
+
+ for (i = 2; i < nipsecsp_targets; i++) {
+ kt = &ipsecsp_targets[i];
+ if (cnp->cn_namelen == kt->kt_namlen &&
+ memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0)
+ goto found;
+ }
+
+ ep = NULL;
+ id = strtoul(pname, &ep, 10);
+ if (!ep || *ep || ep == pname)
+ break;
+
+ error = kernfs_allocvp(dvp->v_mount, vpp, KFSipsecsp, &ipsecsp_kt, id);
+ if ((error == 0) && wantpunlock) {
+ VOP_UNLOCK(dvp, 0);
+ cnp->cn_flags |= PDIRUNLOCK;
+ }
+ return (error);
+#endif
+
+ default:
+ return (ENOTDIR);
+ }
+
+ return (cnp->cn_nameiop == LOOKUP ? ENOENT : EROFS);
+}
+
+int
+kernfs_open(v)
+ void *v;
+{
+ struct vop_open_args /* {
+ struct vnode *a_vp;
+ int a_mode;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap = v;
+ struct kernfs_node *kfs = VTOKERN(ap->a_vp);
+#ifdef IPSEC
+ struct mbuf *m;
+ struct secpolicy *sp;
+#endif
+
+ switch (kfs->kfs_type) {
+#ifdef IPSEC
+ case KFSipsecsa:
+ m = key_setdumpsa_spi(htonl(kfs->kfs_value));
+ if (m) {
+ m_freem(m);
+ return (0);
+ } else
+ return (ENOENT);
+
+ case KFSipsecsp:
+ sp = key_getspbyid(kfs->kfs_value);
+ if (sp) {
+ kfs->kfs_v = sp;
+ return (0);
+ } else
+ return (ENOENT);
+#endif
+
+ default:
+ return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_OPEN,
+ v, 0);
+ }
+}
+
+int
+kernfs_close(v)
+ void *v;
+{
+ struct vop_close_args /* {
+ struct vnode *a_vp;
+ int a_fflag;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap = v;
+ struct kernfs_node *kfs = VTOKERN(ap->a_vp);
+
+ switch (kfs->kfs_type) {
+#ifdef IPSEC
+ case KFSipsecsp:
+ key_freesp((struct secpolicy *)kfs->kfs_v);
+ break;
+#endif
+
+ default:
+ return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_CLOSE,
+ v, 0);
+ }
+
+ return (0);
+}
+
+int
+kernfs_access(v)
+ void *v;
+{
+ struct vop_access_args /* {
+ struct vnode *a_vp;
+ int a_mode;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap = v;
+ struct vattr va;
+ int error;
+
+ if ((error = VOP_GETATTR(ap->a_vp, &va, ap->a_cred, ap->a_p)) != 0)
+ return (error);
+
+ return (vaccess(va.va_type, va.va_mode, va.va_uid, va.va_gid,
+ ap->a_mode, ap->a_cred));
+}
+
+static int
+kernfs_default_fileop_getattr(v)
+ void *v;
+{
+ struct vop_getattr_args /* {
+ struct vnode *a_vp;
+ struct vattr *a_vap;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap = v;
+ struct vattr *vap = ap->a_vap;
+
+ vap->va_nlink = 1;
+ vap->va_bytes = vap->va_size = 0;
+
+ return 0;
+}
+
+int
+kernfs_getattr(v)
+ void *v;
+{
+ struct vop_getattr_args /* {
+ struct vnode *a_vp;
+ struct vattr *a_vap;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap = v;
+ struct kernfs_node *kfs = VTOKERN(ap->a_vp);
+ struct kernfs_subdir *ks;
+ struct vattr *vap = ap->a_vap;
+ int error = 0;
+ char strbuf[KSTRING], *buf;
+ size_t nread, total;
+
+ VATTR_NULL(vap);
+ vap->va_type = ap->a_vp->v_type;
+ vap->va_uid = 0;
+ vap->va_gid = 0;
+ vap->va_mode = kfs->kfs_mode;
+ vap->va_fileid = kfs->kfs_fileno;
+ vap->va_flags = 0;
+ vap->va_size = 0;
+ vap->va_blocksize = DEV_BSIZE;
+ /*
+ * Make all times be current TOD, except for the "boottime" node.
+ * Avoid microtime(9), it's slow.
+ * We don't guard the read from time(9) with splclock(9) since we
+ * don't actually need to be THAT sure the access is atomic.
+ */
+ if (kfs->kfs_kt && kfs->kfs_kt->kt_namlen == 8 &&
+ !memcmp(kfs->kfs_kt->kt_name, "boottime", 8)) {
+ TIMEVAL_TO_TIMESPEC(&boottime, &vap->va_ctime);
+ } else {
+ TIMEVAL_TO_TIMESPEC(&time, &vap->va_ctime);
+ }
+ vap->va_atime = vap->va_mtime = vap->va_ctime;
+ vap->va_gen = 0;
+ vap->va_flags = 0;
+ vap->va_rdev = 0;
+ vap->va_bytes = 0;
+
+ switch (kfs->kfs_type) {
+ case KFSkern:
+ vap->va_nlink = nkern_dirs;
+ vap->va_bytes = vap->va_size = DEV_BSIZE;
+ break;
+
+ case KFSroot:
+ vap->va_nlink = 1;
+ vap->va_bytes = vap->va_size = DEV_BSIZE;
+ break;
+
+ case KFSsubdir:
+ ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data;
+ vap->va_nlink = ks->ks_dirs;
+ vap->va_bytes = vap->va_size = DEV_BSIZE;
+ break;
+
+ case KFSnull:
+ case KFStime:
+ case KFSint:
+ case KFSstring:
+ case KFShostname:
+ case KFSavenrun:
+ case KFSdevice:
+ case KFSmsgbuf:
+#ifdef IPSEC
+ case KFSipsecsa:
+ case KFSipsecsp:
+#endif
+ vap->va_nlink = 1;
+ total = 0;
+ do {
+ buf = strbuf;
+ error = kernfs_xread(kfs, total, &buf,
+ sizeof(strbuf), &nread);
+ total += nread;
+ } while (error == 0 && nread != 0);
+ vap->va_bytes = vap->va_size = total;
+ break;
+
+#ifdef IPSEC
+ case KFSipsecsadir:
+ case KFSipsecspdir:
+ vap->va_nlink = 2;
+ vap->va_bytes = vap->va_size = DEV_BSIZE;
+ break;
+#endif
+
+ default:
+ error = kernfs_try_fileop(kfs->kfs_type,
+ KERNFS_FILEOP_GETATTR, v, EINVAL);
+ break;
+ }
+
+ return (error);
+}
+
+/*ARGSUSED*/
+int
+kernfs_setattr(v)
+ void *v;
+{
+
+ /*
+ * Silently ignore attribute changes.
+ * This allows for open with truncate to have no
+ * effect until some data is written. I want to
+ * do it this way because all writes are atomic.
+ */
+ return (0);
+}
+
+static int
+kernfs_default_xread(v)
+ void *v;
+{
+ struct vop_read_args /* {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ int a_ioflag;
+ struct ucred *a_cred;
+ } */ *ap = v;
+ struct uio *uio = ap->a_uio;
+ struct kernfs_node *kfs = VTOKERN(ap->a_vp);
+ char strbuf[KSTRING], *buf;
+ off_t off;
+ size_t len;
+ int error;
+
+ if (ap->a_vp->v_type == VDIR)
+ return (EOPNOTSUPP);
+
+ off = uio->uio_offset;
+ buf = strbuf;
+ if ((error = kernfs_xread(kfs, off, &buf, sizeof(strbuf), &len)) == 0)
+ error = uiomove(buf, len, uio);
+ return (error);
+}
+
+int
+kernfs_read(v)
+ void *v;
+{
+ struct vop_read_args /* {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ int a_ioflag;
+ struct ucred *a_cred;
+ } */ *ap = v;
+ struct kernfs_node *kfs = VTOKERN(ap->a_vp);
+
+ return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_READ, v, 0);
+}
+
+static int
+kernfs_default_xwrite(v)
+ void *v;
+{
+ struct vop_write_args /* {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ int a_ioflag;
+ struct ucred *a_cred;
+ } */ *ap = v;
+ struct kernfs_node *kfs = VTOKERN(ap->a_vp);
+ struct uio *uio = ap->a_uio;
+ int error, xlen;
+ char strbuf[KSTRING];
+
+ if (uio->uio_offset != 0)
+ return (EINVAL);
+
+ xlen = min(uio->uio_resid, KSTRING-1);
+ if ((error = uiomove(strbuf, xlen, uio)) != 0)
+ return (error);
+
+ if (uio->uio_resid != 0)
+ return (EIO);
+
+ strbuf[xlen] = '\0';
+ xlen = strlen(strbuf);
+ return (kernfs_xwrite(kfs, strbuf, xlen));
+}
+
+int
+kernfs_write(v)
+ void *v;
+{
+ struct vop_write_args /* {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ int a_ioflag;
+ struct ucred *a_cred;
+ } */ *ap = v;
+ struct kernfs_node *kfs = VTOKERN(ap->a_vp);
+
+ return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_WRITE, v, 0);
+}
+
+int
+kernfs_ioctl(v)
+ void *v;
+{
+ struct vop_ioctl_args /* {
+ const struct vnodeop_desc *a_desc;
+ struct vnode *a_vp;
+ u_long a_command;
+ void *a_data;
+ int a_fflag;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap = v;
+ struct kernfs_node *kfs = VTOKERN(ap->a_vp);
+
+ return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_IOCTL, v,
+ EPASSTHROUGH);
+}
+
+int
+kernfs_mmap(v)
+ void *v;
+{
+ struct vop_mmap_args /* {
+ const struct vnodeop_desc *a_desc;
+ struct vnode *a_vp;
+ int a_fflags;
+ struct ucred *a_cred;
+ struct proc *a_p;
+ } */ *ap = v;
+ struct kernfs_node *kfs = VTOKERN(ap->a_vp);
+
+ return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_MMAP, v, 0);
+}
+
+static int
+kernfs_setdirentfileno_kt(struct dirent *d, const struct kern_target *kt,
+ u_int32_t value, struct vop_readdir_args *ap)
+{
+ struct kernfs_node *kfs;
+ struct vnode *vp;
+ int error;
+
+ if ((error = kernfs_allocvp(ap->a_vp->v_mount, &vp, kt->kt_tag, kt,
+ value)) != 0)
+ return error;
+ if (kt->kt_tag == KFSdevice) {
+ struct vattr va;
+ if ((error = VOP_GETATTR(vp, &va, ap->a_cred,
+ ap->a_uio->uio_segflg == UIO_USERSPACE ?
+ ap->a_uio->uio_procp : &proc0)) != 0)
+ return (error);
+ d->d_fileno = va.va_fileid;
+ } else {
+ kfs = VTOKERN(vp);
+ d->d_fileno = kfs->kfs_fileno;
+ }
+ vput(vp);
+ return 0;
+}
+
+static int
+kernfs_setdirentfileno(struct dirent *d, off_t entry,
+ struct kernfs_node *thisdir_kfs, const struct kern_target *parent_kt,
+ const struct kern_target *kt, struct vop_readdir_args *ap)
+{
+ const struct kern_target *ikt;
+ int error;
+
+ switch (entry) {
+ case 0:
+ d->d_fileno = thisdir_kfs->kfs_fileno;
+ return 0;
+ case 1:
+ ikt = parent_kt;
+ break;
+ default:
+ ikt = kt;
+ break;
+ }
+ if (ikt != thisdir_kfs->kfs_kt) {
+ if ((error = kernfs_setdirentfileno_kt(d, ikt, 0, ap)) != 0)
+ return error;
+ } else
+ d->d_fileno = thisdir_kfs->kfs_fileno;
+ return 0;
+}
+
+int
+kernfs_readdir(v)
+ void *v;
+{
+ struct vop_readdir_args /* {
+ struct vnode *a_vp;
+ struct uio *a_uio;
+ struct ucred *a_cred;
+ int *a_eofflag;
+ off_t **a_cookies;
+ int a_*ncookies;
+ } */ *ap = v;
+ struct uio *uio = ap->a_uio;
+ struct dirent d;
+ struct kernfs_node *kfs = VTOKERN(ap->a_vp);
+ const struct kern_target *kt;
+ const struct dyn_kern_target *dkt = NULL;
+ const struct kernfs_subdir *ks;
+ off_t i, j;
+ int error;
+ off_t *cookies = NULL;
+ int ncookies = 0, n;
+#ifdef IPSEC
+ struct secasvar *sav, *sav2;
+ struct secpolicy *sp;
+#endif
+
+ if (uio->uio_resid < UIO_MX)
+ return (EINVAL);
+ if (uio->uio_offset < 0)
+ return (EINVAL);
+
+ error = 0;
+ i = uio->uio_offset;
+ memset(&d, 0, sizeof(d));
+ d.d_reclen = UIO_MX;
+ ncookies = uio->uio_resid / UIO_MX;
+
+ switch (kfs->kfs_type) {
+ case KFSkern:
+ if (i >= nkern_targets)
+ return (0);
+
+ if (ap->a_ncookies) {
+ ncookies = min(ncookies, (nkern_targets - i));
+ cookies = malloc(ncookies * sizeof(off_t), M_TEMP,
+ M_WAITOK);
+ *ap->a_cookies = cookies;
+ }
+
+ n = 0;
+ for (; i < nkern_targets && uio->uio_resid >= UIO_MX; i++) {
+ if (i < static_nkern_targets)
+ kt = &kern_targets[i];
+ else {
+ if (dkt == NULL) {
+ dkt = SIMPLEQ_FIRST(&dyn_kern_targets);
+ for (j = static_nkern_targets; j < i &&
+ dkt != NULL; j++)
+ dkt = SIMPLEQ_NEXT(dkt, dkt_queue);
+ if (j != i)
+ break;
+ } else {
+ dkt = SIMPLEQ_NEXT(dkt, dkt_queue);
+ if (dkt == NULL)
+ break;
+ }
+ kt = &dkt->dkt_kt;
+ }
+ if (kt->kt_tag == KFSdevice) {
+ dev_t *dp = kt->kt_data;
+ struct vnode *fvp;
+
+ if (*dp == NODEV ||
+ !vfinddev(*dp, kt->kt_vtype, &fvp))
+ continue;
+ }
+ d.d_namlen = kt->kt_namlen;
+ if ((error = kernfs_setdirentfileno(&d, i, kfs,
+ &kern_targets[0], kt, ap)) != 0)
+ break;
+ memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1);
+ d.d_type = kt->kt_type;
+ if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0)
+ break;
+ if (cookies)
+ *cookies++ = i + 1;
+ n++;
+ }
+ ncookies = n;
+ break;
+
+ case KFSroot:
+ if (i >= 2)
+ return 0;
+
+ if (ap->a_ncookies) {
+ ncookies = min(ncookies, (2 - i));
+ cookies = malloc(ncookies * sizeof(off_t), M_TEMP,
+ M_WAITOK);
+ *ap->a_cookies = cookies;
+ }
+
+ n = 0;
+ for (; i < 2 && uio->uio_resid >= UIO_MX; i++) {
+ kt = &kern_targets[i];
+ d.d_namlen = kt->kt_namlen;
+ d.d_fileno = KERNFS_FILENO(kt, kt->kt_tag, 0);
+ memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1);
+ d.d_type = kt->kt_type;
+ if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0)
+ break;
+ if (cookies)
+ *cookies++ = i + 1;
+ n++;
+ }
+ ncookies = n;
+ break;
+
+ case KFSsubdir:
+ ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data;
+ if (i >= ks->ks_nentries)
+ return (0);
+
+ if (ap->a_ncookies) {
+ ncookies = min(ncookies, (ks->ks_nentries - i));
+ cookies = malloc(ncookies * sizeof(off_t), M_TEMP,
+ M_WAITOK);
+ *ap->a_cookies = cookies;
+ }
+
+ dkt = SIMPLEQ_FIRST(&ks->ks_entries);
+ for (j = 0; j < i && dkt != NULL; j++)
+ dkt = SIMPLEQ_NEXT(dkt, dkt_queue);
+ n = 0;
+ for (; i < ks->ks_nentries && uio->uio_resid >= UIO_MX; i++) {
+ if (i < 2)
+ kt = &subdir_targets[i];
+ else {
+ /* check if ks_nentries lied to us */
+ if (dkt == NULL)
+ break;
+ kt = &dkt->dkt_kt;
+ dkt = SIMPLEQ_NEXT(dkt, dkt_queue);
+ }
+ if (kt->kt_tag == KFSdevice) {
+ dev_t *dp = kt->kt_data;
+ struct vnode *fvp;
+
+ if (*dp == NODEV ||
+ !vfinddev(*dp, kt->kt_vtype, &fvp))
+ continue;
+ }
+ d.d_namlen = kt->kt_namlen;
+ if ((error = kernfs_setdirentfileno(&d, i, kfs,
+ ks->ks_parent, kt, ap)) != 0)
+ break;
+ memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1);
+ d.d_type = kt->kt_type;
+ if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0)
+ break;
+ if (cookies)
+ *cookies++ = i + 1;
+ n++;
+ }
+ ncookies = n;
+ break;
+
+#ifdef IPSEC
+ case KFSipsecsadir:
+ /* count SA in the system */
+ n = 0;
+ TAILQ_FOREACH(sav, &satailq, tailq) {
+ for (sav2 = TAILQ_FIRST(&satailq);
+ sav2 != sav;
+ sav2 = TAILQ_NEXT(sav2, tailq)) {
+ if (sav->spi == sav2->spi) {
+ /* multiple SA with same SPI */
+ break;
+ }
+ }
+ if (sav == sav2 || sav->spi != sav2->spi)
+ n++;
+ }
+
+ if (i >= nipsecsa_targets + n)
+ return (0);
+
+ if (ap->a_ncookies) {
+ ncookies = min(ncookies, (n - i));
+ cookies = malloc(ncookies * sizeof(off_t), M_TEMP,
+ M_WAITOK);
+ *ap->a_cookies = cookies;
+ }
+
+ n = 0;
+ for (; i < nipsecsa_targets && uio->uio_resid >= UIO_MX; i++) {
+ kt = &ipsecsa_targets[i];
+ d.d_namlen = kt->kt_namlen;
+ if ((error = kernfs_setdirentfileno(&d, i, kfs,
+ &kern_targets[0], kt, ap)) != 0)
+ break;
+ memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1);
+ d.d_type = kt->kt_type;
+ if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0)
+ break;
+ if (cookies)
+ *cookies++ = i + 1;
+ n++;
+ }
+ if (error) {
+ ncookies = n;
+ break;
+ }
+
+ TAILQ_FOREACH(sav, &satailq, tailq) {
+ for (sav2 = TAILQ_FIRST(&satailq);
+ sav2 != sav;
+ sav2 = TAILQ_NEXT(sav2, tailq)) {
+ if (sav->spi == sav2->spi) {
+ /* multiple SA with same SPI */
+ break;
+ }
+ }
+ if (sav != sav2 && sav->spi == sav2->spi)
+ continue;
+ if (uio->uio_resid < UIO_MX)
+ break;
+ if ((error = kernfs_setdirentfileno_kt(&d, &ipsecsa_kt,
+ sav->spi, ap)) != 0)
+ break;
+ d.d_namlen = snprintf(d.d_name, sizeof(d.d_name),
+ "%u", ntohl(sav->spi));
+ d.d_type = DT_REG;
+ if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0)
+ break;
+ if (cookies)
+ *cookies++ = i + 1;
+ n++;
+ i++;
+ }
+ ncookies = n;
+ break;
+
+ case KFSipsecspdir:
+ /* count SP in the system */
+ n = 0;
+ TAILQ_FOREACH(sp, &sptailq, tailq)
+ n++;
+
+ if (i >= nipsecsp_targets + n)
+ return (0);
+
+ if (ap->a_ncookies) {
+ ncookies = min(ncookies, (n - i));
+ cookies = malloc(ncookies * sizeof(off_t), M_TEMP,
+ M_WAITOK);
+ *ap->a_cookies = cookies;
+ }
+
+ n = 0;
+ for (; i < nipsecsp_targets && uio->uio_resid >= UIO_MX; i++) {
+ kt = &ipsecsp_targets[i];
+ d.d_namlen = kt->kt_namlen;
+ if ((error = kernfs_setdirentfileno(&d, i, kfs,
+ &kern_targets[0], kt, ap)) != 0)
+ break;
+ memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1);
+ d.d_type = kt->kt_type;
+ if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0)
+ break;
+ if (cookies)
+ *cookies++ = i + 1;
+ n++;
+ }
+ if (error) {
+ ncookies = n;
+ break;
+ }
+
+ TAILQ_FOREACH(sp, &sptailq, tailq) {
+ if (uio->uio_resid < UIO_MX)
+ break;
+ if ((error = kernfs_setdirentfileno_kt(&d, &ipsecsp_kt,
+ sp->id, ap)) != 0)
+ break;
+ d.d_namlen = snprintf(d.d_name, sizeof(d.d_name),
+ "%u", sp->id);
+ d.d_type = DT_REG;
+ if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0)
+ break;
+ if (cookies)
+ *cookies++ = i + 1;
+ n++;
+ i++;
+ }
+ ncookies = n;
+ break;
+#endif
+
+ default:
+ error = ENOTDIR;
+ break;
+ }
+
+ if (ap->a_ncookies) {
+ if (error) {
+ if (cookies)
+ free(*ap->a_cookies, M_TEMP);
+ *ap->a_ncookies = 0;
+ *ap->a_cookies = NULL;
+ } else
+ *ap->a_ncookies = ncookies;
+ }
+
+ uio->uio_offset = i;
+ return (error);
+}
+
+int
+kernfs_inactive(v)
+ void *v;
+{
+ struct vop_inactive_args /* {
+ struct vnode *a_vp;
+ struct proc *a_p;
+ } */ *ap = v;
+ struct vnode *vp = ap->a_vp;
+ const struct kernfs_node *kfs = VTOKERN(ap->a_vp);
+#ifdef IPSEC
+ struct mbuf *m;
+ struct secpolicy *sp;
+#endif
+
+ VOP_UNLOCK(vp, 0);
+ switch (kfs->kfs_type) {
+#ifdef IPSEC
+ case KFSipsecsa:
+ m = key_setdumpsa_spi(htonl(kfs->kfs_value));
+ if (m)
+ m_freem(m);
+ else
+ vgone(vp);
+ break;
+ case KFSipsecsp:
+ sp = key_getspbyid(kfs->kfs_value);
+ if (sp)
+ key_freesp(sp);
+ else {
+ /* should never happen as we hold a refcnt */
+ vgone(vp);
+ }
+ break;
+#endif
+ default:
+ break;
+ }
+ return (0);
+}
+
+int
+kernfs_reclaim(v)
+ void *v;
+{
+ struct vop_reclaim_args /* {
+ struct vnode *a_vp;
+ } */ *ap = v;
+
+ return (kernfs_freevp(ap->a_vp));
+}
+
+/*
+ * Return POSIX pathconf information applicable to special devices.
+ */
+int
+kernfs_pathconf(v)
+ void *v;
+{
+ struct vop_pathconf_args /* {
+ struct vnode *a_vp;
+ int a_name;
+ register_t *a_retval;
+ } */ *ap = v;
+
+ switch (ap->a_name) {
+ case _PC_LINK_MAX:
+ *ap->a_retval = LINK_MAX;
+ return (0);
+ case _PC_MAX_CANON:
+ *ap->a_retval = MAX_CANON;
+ return (0);
+ case _PC_MAX_INPUT:
+ *ap->a_retval = MAX_INPUT;
+ return (0);
+ case _PC_PIPE_BUF:
+ *ap->a_retval = PIPE_BUF;
+ return (0);
+ case _PC_CHOWN_RESTRICTED:
+ *ap->a_retval = 1;
+ return (0);
+ case _PC_VDISABLE:
+ *ap->a_retval = _POSIX_VDISABLE;
+ return (0);
+ case _PC_SYNC_IO:
+ *ap->a_retval = 1;
+ return (0);
+ default:
+ return (EINVAL);
+ }
+ /* NOTREACHED */
+}
+
+/*
+ * Print out the contents of a /dev/fd vnode.
+ */
+/* ARGSUSED */
+int
+kernfs_print(v)
+ void *v;
+{
+
+ printf("tag VT_KERNFS, kernfs vnode\n");
+ return (0);
+}
+
+int
+kernfs_link(v)
+ void *v;
+{
+ struct vop_link_args /* {
+ struct vnode *a_dvp;
+ struct vnode *a_vp;
+ struct componentname *a_cnp;
+ } */ *ap = v;
+
+ VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
+ vput(ap->a_dvp);
+ return (EROFS);
+}
+
+int
+kernfs_symlink(v)
+ void *v;
+{
+ struct vop_symlink_args /* {
+ struct vnode *a_dvp;
+ struct vnode **a_vpp;
+ struct componentname *a_cnp;
+ struct vattr *a_vap;
+ char *a_target;
+ } */ *ap = v;
+
+ VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
+ vput(ap->a_dvp);
+ return (EROFS);
+}
projects / xen.git / commitdiff