/*- * Copyright (c) 1999 Poul-Henning Kamp. * Copyright (c) 2008 Bjoern A. Zeeb. * Copyright (c) 2009 James Gritton. * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. */ #include __FBSDID("$FreeBSD$"); #include "opt_ddb.h" #include "opt_inet.h" #include "opt_inet6.h" #include "opt_mac.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DDB #include #ifdef INET6 #include #endif /* INET6 */ #endif /* DDB */ #include MALLOC_DEFINE(M_PRISON, "prison", "Prison structures"); SYSCTL_NODE(_security, OID_AUTO, jail, CTLFLAG_RW, 0, "Jail rules"); int jail_set_hostname_allowed = 1; SYSCTL_INT(_security_jail, OID_AUTO, set_hostname_allowed, CTLFLAG_RW, &jail_set_hostname_allowed, 0, "Processes in jail can set their hostnames"); int jail_socket_unixiproute_only = 1; SYSCTL_INT(_security_jail, OID_AUTO, socket_unixiproute_only, CTLFLAG_RW, &jail_socket_unixiproute_only, 0, "Processes in jail are limited to creating UNIX/IP/route sockets only"); int jail_sysvipc_allowed = 0; SYSCTL_INT(_security_jail, OID_AUTO, sysvipc_allowed, CTLFLAG_RW, &jail_sysvipc_allowed, 0, "Processes in jail can use System V IPC primitives"); static int jail_enforce_statfs = 2; SYSCTL_INT(_security_jail, OID_AUTO, enforce_statfs, CTLFLAG_RW, &jail_enforce_statfs, 0, "Processes in jail cannot see all mounted file systems"); int jail_allow_raw_sockets = 0; SYSCTL_INT(_security_jail, OID_AUTO, allow_raw_sockets, CTLFLAG_RW, &jail_allow_raw_sockets, 0, "Prison root can create raw sockets"); int jail_chflags_allowed = 0; SYSCTL_INT(_security_jail, OID_AUTO, chflags_allowed, CTLFLAG_RW, &jail_chflags_allowed, 0, "Processes in jail can alter system file flags"); int jail_mount_allowed = 0; SYSCTL_INT(_security_jail, OID_AUTO, mount_allowed, CTLFLAG_RW, &jail_mount_allowed, 0, "Processes in jail can mount/unmount jail-friendly file systems"); int jail_max_af_ips = 255; SYSCTL_INT(_security_jail, OID_AUTO, jail_max_af_ips, CTLFLAG_RW, &jail_max_af_ips, 0, "Number of IP addresses a jail may have at most per address family"); /* allprison, lastprid, and prisoncount are protected by allprison_lock. */ struct sx allprison_lock; SX_SYSINIT(allprison_lock, &allprison_lock, "allprison"); struct prisonlist allprison = TAILQ_HEAD_INITIALIZER(allprison); int lastprid = 0; int prisoncount = 0; static int do_jail_attach(struct thread *td, struct prison *pr); static void prison_complete(void *context, int pending); static void prison_deref(struct prison *pr, int flags); #ifdef INET static int _prison_check_ip4(struct prison *pr, struct in_addr *ia); #endif #ifdef INET6 static int _prison_check_ip6(struct prison *pr, struct in6_addr *ia6); #endif static int sysctl_jail_list(SYSCTL_HANDLER_ARGS); /* Flags for prison_deref */ #define PD_DEREF 0x01 #define PD_DEUREF 0x02 #define PD_LOCKED 0x04 #define PD_LIST_SLOCKED 0x08 #define PD_LIST_XLOCKED 0x10 #ifdef INET static int qcmp_v4(const void *ip1, const void *ip2) { in_addr_t iaa, iab; /* * We need to compare in HBO here to get the list sorted as expected * by the result of the code. Sorting NBO addresses gives you * interesting results. If you do not understand, do not try. */ iaa = ntohl(((const struct in_addr *)ip1)->s_addr); iab = ntohl(((const struct in_addr *)ip2)->s_addr); /* * Do not simply return the difference of the two numbers, the int is * not wide enough. */ if (iaa > iab) return (1); else if (iaa < iab) return (-1); else return (0); } #endif #ifdef INET6 static int qcmp_v6(const void *ip1, const void *ip2) { const struct in6_addr *ia6a, *ia6b; int i, rc; ia6a = (const struct in6_addr *)ip1; ia6b = (const struct in6_addr *)ip2; rc = 0; for (i = 0; rc == 0 && i < sizeof(struct in6_addr); i++) { if (ia6a->s6_addr[i] > ia6b->s6_addr[i]) rc = 1; else if (ia6a->s6_addr[i] < ia6b->s6_addr[i]) rc = -1; } return (rc); } #endif /* * struct jail_args { * struct jail *jail; * }; */ int jail(struct thread *td, struct jail_args *uap) { struct iovec optiov[10]; struct uio opt; char *u_path, *u_hostname, *u_name; #ifdef INET struct in_addr *u_ip4; #endif #ifdef INET6 struct in6_addr *u_ip6; #endif uint32_t version; int error; error = copyin(uap->jail, &version, sizeof(uint32_t)); if (error) return (error); switch (version) { case 0: { /* FreeBSD single IPv4 jails. */ struct jail_v0 j0; error = copyin(uap->jail, &j0, sizeof(struct jail_v0)); if (error) return (error); u_path = malloc(MAXPATHLEN + MAXHOSTNAMELEN, M_TEMP, M_WAITOK); u_hostname = u_path + MAXPATHLEN; opt.uio_iov = optiov; opt.uio_iovcnt = 4; opt.uio_offset = -1; opt.uio_resid = -1; opt.uio_segflg = UIO_SYSSPACE; opt.uio_rw = UIO_READ; opt.uio_td = td; optiov[0].iov_base = "path"; optiov[0].iov_len = sizeof("path"); optiov[1].iov_base = u_path; error = copyinstr(j0.path, u_path, MAXPATHLEN, &optiov[1].iov_len); if (error) { free(u_path, M_TEMP); return (error); } optiov[2].iov_base = "host.hostname"; optiov[2].iov_len = sizeof("host.hostname"); optiov[3].iov_base = u_hostname; error = copyinstr(j0.hostname, u_hostname, MAXHOSTNAMELEN, &optiov[3].iov_len); if (error) { free(u_path, M_TEMP); return (error); } #ifdef INET optiov[opt.uio_iovcnt].iov_base = "ip4.addr"; optiov[opt.uio_iovcnt].iov_len = sizeof("ip4.addr"); opt.uio_iovcnt++; optiov[opt.uio_iovcnt].iov_base = &j0.ip_number; j0.ip_number = htonl(j0.ip_number); optiov[opt.uio_iovcnt].iov_len = sizeof(j0.ip_number); opt.uio_iovcnt++; #endif break; } case 1: /* * Version 1 was used by multi-IPv4 jail implementations * that never made it into the official kernel. */ return (EINVAL); case 2: /* JAIL_API_VERSION */ { /* FreeBSD multi-IPv4/IPv6,noIP jails. */ struct jail j; size_t tmplen; error = copyin(uap->jail, &j, sizeof(struct jail)); if (error) return (error); tmplen = MAXPATHLEN + MAXHOSTNAMELEN + MAXHOSTNAMELEN; #ifdef INET if (j.ip4s > jail_max_af_ips) return (EINVAL); tmplen += j.ip4s * sizeof(struct in_addr); #else if (j.ip4s > 0) return (EINVAL); #endif #ifdef INET6 if (j.ip6s > jail_max_af_ips) return (EINVAL); tmplen += j.ip6s * sizeof(struct in6_addr); #else if (j.ip6s > 0) return (EINVAL); #endif u_path = malloc(tmplen, M_TEMP, M_WAITOK); u_hostname = u_path + MAXPATHLEN; u_name = u_hostname + MAXHOSTNAMELEN; #ifdef INET u_ip4 = (struct in_addr *)(u_name + MAXHOSTNAMELEN); #endif #ifdef INET6 #ifdef INET u_ip6 = (struct in6_addr *)(u_ip4 + j.ip4s); #else u_ip6 = (struct in6_addr *)(u_name + MAXHOSTNAMELEN); #endif #endif opt.uio_iov = optiov; opt.uio_iovcnt = 4; opt.uio_offset = -1; opt.uio_resid = -1; opt.uio_segflg = UIO_SYSSPACE; opt.uio_rw = UIO_READ; opt.uio_td = td; optiov[0].iov_base = "path"; optiov[0].iov_len = sizeof("path"); optiov[1].iov_base = u_path; error = copyinstr(j.path, u_path, MAXPATHLEN, &optiov[1].iov_len); if (error) { free(u_path, M_TEMP); return (error); } optiov[2].iov_base = "host.hostname"; optiov[2].iov_len = sizeof("host.hostname"); optiov[3].iov_base = u_hostname; error = copyinstr(j.hostname, u_hostname, MAXHOSTNAMELEN, &optiov[3].iov_len); if (error) { free(u_path, M_TEMP); return (error); } if (j.jailname != NULL) { optiov[opt.uio_iovcnt].iov_base = "name"; optiov[opt.uio_iovcnt].iov_len = sizeof("name"); opt.uio_iovcnt++; optiov[opt.uio_iovcnt].iov_base = u_name; error = copyinstr(j.jailname, u_name, MAXHOSTNAMELEN, &optiov[opt.uio_iovcnt].iov_len); if (error) { free(u_path, M_TEMP); return (error); } opt.uio_iovcnt++; } #ifdef INET optiov[opt.uio_iovcnt].iov_base = "ip4.addr"; optiov[opt.uio_iovcnt].iov_len = sizeof("ip4.addr"); opt.uio_iovcnt++; optiov[opt.uio_iovcnt].iov_base = u_ip4; optiov[opt.uio_iovcnt].iov_len = j.ip4s * sizeof(struct in_addr); error = copyin(j.ip4, u_ip4, optiov[opt.uio_iovcnt].iov_len); if (error) { free(u_path, M_TEMP); return (error); } opt.uio_iovcnt++; #endif #ifdef INET6 optiov[opt.uio_iovcnt].iov_base = "ip6.addr"; optiov[opt.uio_iovcnt].iov_len = sizeof("ip6.addr"); opt.uio_iovcnt++; optiov[opt.uio_iovcnt].iov_base = u_ip6; optiov[opt.uio_iovcnt].iov_len = j.ip6s * sizeof(struct in6_addr); error = copyin(j.ip6, u_ip6, optiov[opt.uio_iovcnt].iov_len); if (error) { free(u_path, M_TEMP); return (error); } opt.uio_iovcnt++; #endif break; } default: /* Sci-Fi jails are not supported, sorry. */ return (EINVAL); } error = kern_jail_set(td, &opt, JAIL_CREATE | JAIL_ATTACH); free(u_path, M_TEMP); return (error); } /* * struct jail_set_args { * struct iovec *iovp; * unsigned int iovcnt; * int flags; * }; */ int jail_set(struct thread *td, struct jail_set_args *uap) { struct uio *auio; int error; /* Check that we have an even number of iovecs. */ if (uap->iovcnt & 1) return (EINVAL); error = copyinuio(uap->iovp, uap->iovcnt, &auio); if (error) return (error); error = kern_jail_set(td, auio, uap->flags); free(auio, M_IOV); return (error); } int kern_jail_set(struct thread *td, struct uio *optuio, int flags) { struct nameidata nd; #ifdef INET struct in_addr *ip4; #endif #ifdef INET6 struct in6_addr *ip6; #endif struct vfsopt *opt; struct vfsoptlist *opts; struct prison *pr, *deadpr, *tpr; struct vnode *root; char *errmsg, *host, *name, *p, *path; void *op; int created, cuflags, error, errmsg_len, errmsg_pos; int gotslevel, jid, len; int slevel, vfslocked; #if defined(INET) || defined(INET6) int ii; #endif #ifdef INET int ip4s; #endif #ifdef INET6 int ip6s; #endif unsigned pr_flags, ch_flags; char numbuf[12]; error = priv_check(td, PRIV_JAIL_SET); if (!error && (flags & JAIL_ATTACH)) error = priv_check(td, PRIV_JAIL_ATTACH); if (error) return (error); if (flags & ~JAIL_SET_MASK) return (EINVAL); /* * Check all the parameters before committing to anything. Not all * errors can be caught early, but we may as well try. Also, this * takes care of some expensive stuff (path lookup) before getting * the allprison lock. * * XXX Jails are not filesystems, and jail parameters are not mount * options. But it makes more sense to re-use the vfsopt code * than duplicate it under a different name. */ error = vfs_buildopts(optuio, &opts); if (error) return (error); #ifdef INET ip4 = NULL; #endif #ifdef INET6 ip6 = NULL; #endif error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); if (error == ENOENT) jid = 0; else if (error != 0) goto done_free; error = vfs_copyopt(opts, "securelevel", &slevel, sizeof(slevel)); if (error == ENOENT) gotslevel = 0; else if (error != 0) goto done_free; else gotslevel = 1; pr_flags = ch_flags = 0; vfs_flagopt(opts, "persist", &pr_flags, PR_PERSIST); vfs_flagopt(opts, "nopersist", &ch_flags, PR_PERSIST); ch_flags |= pr_flags; if ((flags & (JAIL_CREATE | JAIL_UPDATE | JAIL_ATTACH)) == JAIL_CREATE && !(pr_flags & PR_PERSIST)) { error = EINVAL; vfs_opterror(opts, "new jail must persist or attach"); goto done_errmsg; } error = vfs_getopt(opts, "name", (void **)&name, &len); if (error == ENOENT) name = NULL; else if (error != 0) goto done_free; else { if (len == 0 || name[len - 1] != '\0') { error = EINVAL; goto done_free; } if (len > MAXHOSTNAMELEN) { error = ENAMETOOLONG; goto done_free; } } error = vfs_getopt(opts, "host.hostname", (void **)&host, &len); if (error == ENOENT) host = NULL; else if (error != 0) goto done_free; else { if (len == 0 || host[len - 1] != '\0') { error = EINVAL; goto done_free; } if (len > MAXHOSTNAMELEN) { error = ENAMETOOLONG; goto done_free; } } #ifdef INET error = vfs_getopt(opts, "ip4.addr", &op, &ip4s); if (error == ENOENT) ip4s = -1; else if (error != 0) goto done_free; else if (ip4s & (sizeof(*ip4) - 1)) { error = EINVAL; goto done_free; } else if (ip4s > 0) { ip4s /= sizeof(*ip4); if (ip4s > jail_max_af_ips) { error = EINVAL; vfs_opterror(opts, "too many IPv4 addresses"); goto done_errmsg; } ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); bcopy(op, ip4, ip4s * sizeof(*ip4)); /* * IP addresses are all sorted but ip[0] to preserve the * primary IP address as given from userland. This special IP * is used for unbound outgoing connections as well for * "loopback" traffic. */ if (ip4s > 1) qsort(ip4 + 1, ip4s - 1, sizeof(*ip4), qcmp_v4); /* * Check for duplicate addresses and do some simple zero and * broadcast checks. If users give other bogus addresses it is * their problem. * * We do not have to care about byte order for these checks so * we will do them in NBO. */ for (ii = 0; ii < ip4s; ii++) { if (ip4[ii].s_addr == INADDR_ANY || ip4[ii].s_addr == INADDR_BROADCAST) { error = EINVAL; goto done_free; } if ((ii+1) < ip4s && (ip4[0].s_addr == ip4[ii+1].s_addr || ip4[ii].s_addr == ip4[ii+1].s_addr)) { error = EINVAL; goto done_free; } } } #endif #ifdef INET6 error = vfs_getopt(opts, "ip6.addr", &op, &ip6s); if (error == ENOENT) ip6s = -1; else if (error != 0) goto done_free; else if (ip6s & (sizeof(*ip6) - 1)) { error = EINVAL; goto done_free; } else if (ip6s > 0) { ip6s /= sizeof(*ip6); if (ip6s > jail_max_af_ips) { error = EINVAL; vfs_opterror(opts, "too many IPv6 addresses"); goto done_errmsg; } ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); bcopy(op, ip6, ip6s * sizeof(*ip6)); if (ip6s > 1) qsort(ip6 + 1, ip6s - 1, sizeof(*ip6), qcmp_v6); for (ii = 0; ii < ip6s; ii++) { if (IN6_IS_ADDR_UNSPECIFIED(&ip6[0])) { error = EINVAL; goto done_free; } if ((ii+1) < ip6s && (IN6_ARE_ADDR_EQUAL(&ip6[0], &ip6[ii+1]) || IN6_ARE_ADDR_EQUAL(&ip6[ii], &ip6[ii+1]))) { error = EINVAL; goto done_free; } } } #endif root = NULL; error = vfs_getopt(opts, "path", (void **)&path, &len); if (error == ENOENT) path = NULL; else if (error != 0) goto done_free; else { if (flags & JAIL_UPDATE) { error = EINVAL; vfs_opterror(opts, "path cannot be changed after creation"); goto done_errmsg; } if (len == 0 || path[len - 1] != '\0') { error = EINVAL; goto done_free; } if (len > MAXPATHLEN) { error = ENAMETOOLONG; goto done_free; } if (len < 2 || (len == 2 && path[0] == '/')) path = NULL; else { NDINIT(&nd, LOOKUP, MPSAFE | FOLLOW, UIO_SYSSPACE, path, td); error = namei(&nd); if (error) goto done_free; vfslocked = NDHASGIANT(&nd); root = nd.ni_vp; NDFREE(&nd, NDF_ONLY_PNBUF); if (root->v_type != VDIR) { error = ENOTDIR; vrele(root); VFS_UNLOCK_GIANT(vfslocked); goto done_free; } VFS_UNLOCK_GIANT(vfslocked); } } /* * Grab the allprison lock before letting modules check their * parameters. Once we have it, do not let go so we'll have a * consistent view of the OSD list. */ sx_xlock(&allprison_lock); error = osd_jail_call(NULL, PR_METHOD_CHECK, opts); if (error) goto done_unlock_list; /* By now, all parameters should have been noted. */ TAILQ_FOREACH(opt, opts, link) { if (!opt->seen && strcmp(opt->name, "errmsg")) { error = EINVAL; vfs_opterror(opts, "unknown parameter: %s", opt->name); goto done_unlock_list; } } /* * See if we are creating a new record or updating an existing one. * This abuses the file error codes ENOENT and EEXIST. */ cuflags = flags & (JAIL_CREATE | JAIL_UPDATE); if (!cuflags) { error = EINVAL; vfs_opterror(opts, "no valid operation (create or update)"); goto done_unlock_list; } pr = NULL; if (jid != 0) { /* See if a requested jid already exists. */ if (jid < 0) { error = EINVAL; vfs_opterror(opts, "negative jid"); goto done_unlock_list; } pr = prison_find(jid); if (pr != NULL) { /* Create: jid must not exist. */ if (cuflags == JAIL_CREATE) { mtx_unlock(&pr->pr_mtx); error = EEXIST; vfs_opterror(opts, "jail %d already exists", jid); goto done_unlock_list; } if (pr->pr_uref == 0) { if (!(flags & JAIL_DYING)) { mtx_unlock(&pr->pr_mtx); error = ENOENT; vfs_opterror(opts, "jail %d is dying", jid); goto done_unlock_list; } else if ((flags & JAIL_ATTACH) || (pr_flags & PR_PERSIST)) { /* * A dying jail might be resurrected * (via attach or persist), but first * it must determine if another jail * has claimed its name. Accomplish * this by implicitly re-setting the * name. */ if (name == NULL) name = pr->pr_name; } } } if (pr == NULL) { /* Update: jid must exist. */ if (cuflags == JAIL_UPDATE) { error = ENOENT; vfs_opterror(opts, "jail %d not found", jid); goto done_unlock_list; } } } /* * If the caller provided a name, look for a jail by that name. * This has different semantics for creates and updates keyed by jid * (where the name must not already exist in a different jail), * and updates keyed by the name itself (where the name must exist * because that is the jail being updated). */ if (name != NULL) { if (name[0] != '\0') { deadpr = NULL; name_again: TAILQ_FOREACH(tpr, &allprison, pr_list) { if (tpr != pr && tpr->pr_ref > 0 && !strcmp(tpr->pr_name, name)) { if (pr == NULL && cuflags != JAIL_CREATE) { mtx_lock(&tpr->pr_mtx); if (tpr->pr_ref > 0) { /* * Use this jail * for updates. */ if (tpr->pr_uref > 0) { pr = tpr; break; } deadpr = tpr; } mtx_unlock(&tpr->pr_mtx); } else if (tpr->pr_uref > 0) { /* * Create, or update(jid): * name must not exist in an * active jail. */ error = EEXIST; if (pr != NULL) mtx_unlock(&pr->pr_mtx); vfs_opterror(opts, "jail \"%s\" already exists", name); goto done_unlock_list; } } } /* If no active jail is found, use a dying one. */ if (deadpr != NULL && pr == NULL) { if (flags & JAIL_DYING) { mtx_lock(&deadpr->pr_mtx); if (deadpr->pr_ref == 0) { mtx_unlock(&deadpr->pr_mtx); goto name_again; } pr = deadpr; } else if (cuflags == JAIL_UPDATE) { error = ENOENT; vfs_opterror(opts, "jail \"%s\" is dying", name); goto done_unlock_list; } } /* Update: name must exist if no jid. */ else if (cuflags == JAIL_UPDATE && pr == NULL) { error = ENOENT; vfs_opterror(opts, "jail \"%s\" not found", name); goto done_unlock_list; } } } /* Update: must provide a jid or name. */ else if (cuflags == JAIL_UPDATE && pr == NULL) { error = ENOENT; vfs_opterror(opts, "update specified no jail"); goto done_unlock_list; } /* If there's no prison to update, create a new one and link it in. */ if (pr == NULL) { created = 1; pr = malloc(sizeof(*pr), M_PRISON, M_WAITOK | M_ZERO); if (jid == 0) { /* Find the next free jid. */ jid = lastprid + 1; findnext: if (jid == JAIL_MAX) jid = 1; TAILQ_FOREACH(tpr, &allprison, pr_list) { if (tpr->pr_id < jid) continue; if (tpr->pr_id > jid || tpr->pr_ref == 0) { TAILQ_INSERT_BEFORE(tpr, pr, pr_list); break; } if (jid == lastprid) { error = EAGAIN; vfs_opterror(opts, "no available jail IDs"); free(pr, M_PRISON); goto done_unlock_list; } jid++; goto findnext; } lastprid = jid; } else { /* * The jail already has a jid (that did not yet exist), * so just find where to insert it. */ TAILQ_FOREACH(tpr, &allprison, pr_list) if (tpr->pr_id >= jid) { TAILQ_INSERT_BEFORE(tpr, pr, pr_list); break; } } if (tpr == NULL) TAILQ_INSERT_TAIL(&allprison, pr, pr_list); prisoncount++; pr->pr_id = jid; if (name == NULL) name = ""; if (path == NULL) { path = "/"; root = rootvnode; vref(root); } mtx_init(&pr->pr_mtx, "jail mutex", NULL, MTX_DEF); /* * Allocate a dedicated cpuset for each jail. * Unlike other initial settings, this may return an erorr. */ error = cpuset_create_root(td, &pr->pr_cpuset); if (error) { prison_deref(pr, PD_LIST_XLOCKED); goto done_releroot; } mtx_lock(&pr->pr_mtx); /* * New prisons do not yet have a reference, because we do not * want other to see the incomplete prison once the * allprison_lock is downgraded. */ } else { created = 0; /* * Grab a reference for existing prisons, to ensure they * continue to exist for the duration of the call. */ pr->pr_ref++; } /* Do final error checking before setting anything. */ error = 0; #if defined(INET) || defined(INET6) if ( #ifdef INET ip4s > 0 #ifdef INET6 || #endif #endif #ifdef INET6 ip6s > 0 #endif ) /* * Check for conflicting IP addresses. We permit them if there * is no more than 1 IP on each jail. If there is a duplicate * on a jail with more than one IP stop checking and return * error. */ TAILQ_FOREACH(tpr, &allprison, pr_list) { if (tpr == pr || tpr->pr_uref == 0) continue; #ifdef INET if ((ip4s > 0 && tpr->pr_ip4s > 1) || (ip4s > 1 && tpr->pr_ip4s > 0)) for (ii = 0; ii < ip4s; ii++) if (_prison_check_ip4(tpr, &ip4[ii]) == 0) { error = EINVAL; vfs_opterror(opts, "IPv4 addresses clash"); goto done_deref_locked; } #endif #ifdef INET6 if ((ip6s > 0 && tpr->pr_ip6s > 1) || (ip6s > 1 && tpr->pr_ip6s > 0)) for (ii = 0; ii < ip6s; ii++) if (_prison_check_ip6(tpr, &ip6[ii]) == 0) { error = EINVAL; vfs_opterror(opts, "IPv6 addresses clash"); goto done_deref_locked; } #endif } #endif if (error == 0 && name != NULL) { /* Give a default name of the jid. */ if (name[0] == '\0') snprintf(name = numbuf, sizeof(numbuf), "%d", jid); else if (strtoul(name, &p, 10) != jid && *p == '\0') { error = EINVAL; vfs_opterror(opts, "name cannot be numeric"); } } if (error) { done_deref_locked: /* * Some parameter had an error so do not set anything. * If this is a new jail, it will go away without ever * having been seen. */ prison_deref(pr, created ? PD_LOCKED | PD_LIST_XLOCKED : PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); goto done_releroot; } /* Set the parameters of the prison. */ #ifdef INET if (ip4s >= 0) { pr->pr_ip4s = ip4s; free(pr->pr_ip4, M_PRISON); pr->pr_ip4 = ip4; ip4 = NULL; } #endif #ifdef INET6 if (ip6s >= 0) { pr->pr_ip6s = ip6s; free(pr->pr_ip6, M_PRISON); pr->pr_ip6 = ip6; ip6 = NULL; } #endif if (gotslevel) pr->pr_securelevel = slevel; if (name != NULL) strlcpy(pr->pr_name, name, sizeof(pr->pr_name)); if (path != NULL) { strlcpy(pr->pr_path, path, sizeof(pr->pr_path)); pr->pr_root = root; } if (host != NULL) strlcpy(pr->pr_host, host, sizeof(pr->pr_host)); /* * Persistent prisons get an extra reference, and prisons losing their * persist flag lose that reference. Only do this for existing prisons * for now, so new ones will remain unseen until after the module * handlers have completed. */ if (!created && (ch_flags & PR_PERSIST & (pr_flags ^ pr->pr_flags))) { if (pr_flags & PR_PERSIST) { pr->pr_ref++; pr->pr_uref++; } else { pr->pr_ref--; pr->pr_uref--; } } pr->pr_flags = (pr->pr_flags & ~ch_flags) | pr_flags; mtx_unlock(&pr->pr_mtx); /* Let the modules do their work. */ sx_downgrade(&allprison_lock); if (created) { error = osd_jail_call(pr, PR_METHOD_CREATE, opts); if (error) { prison_deref(pr, PD_LIST_SLOCKED); goto done_errmsg; } } error = osd_jail_call(pr, PR_METHOD_SET, opts); if (error) { prison_deref(pr, created ? PD_LIST_SLOCKED : PD_DEREF | PD_LIST_SLOCKED); goto done_errmsg; } /* Attach this process to the prison if requested. */ if (flags & JAIL_ATTACH) { mtx_lock(&pr->pr_mtx); error = do_jail_attach(td, pr); if (error) { vfs_opterror(opts, "attach failed"); if (!created) prison_deref(pr, PD_DEREF); goto done_errmsg; } } /* * Now that it is all there, drop the temporary reference from existing * prisons. Or add a reference to newly created persistent prisons * (which was not done earlier so that the prison would not be publicly * visible). */ if (!created) { prison_deref(pr, (flags & JAIL_ATTACH) ? PD_DEREF : PD_DEREF | PD_LIST_SLOCKED); } else { if (pr_flags & PR_PERSIST) { mtx_lock(&pr->pr_mtx); pr->pr_ref++; pr->pr_uref++; mtx_unlock(&pr->pr_mtx); } if (!(flags & JAIL_ATTACH)) sx_sunlock(&allprison_lock); } td->td_retval[0] = pr->pr_id; goto done_errmsg; done_unlock_list: sx_xunlock(&allprison_lock); done_releroot: if (root != NULL) { vfslocked = VFS_LOCK_GIANT(root->v_mount); vrele(root); VFS_UNLOCK_GIANT(vfslocked); } done_errmsg: if (error) { vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); if (errmsg_len > 0) { errmsg_pos = 2 * vfs_getopt_pos(opts, "errmsg") + 1; if (errmsg_pos > 0) { if (optuio->uio_segflg == UIO_SYSSPACE) bcopy(errmsg, optuio->uio_iov[errmsg_pos].iov_base, errmsg_len); else copyout(errmsg, optuio->uio_iov[errmsg_pos].iov_base, errmsg_len); } } } done_free: #ifdef INET free(ip4, M_PRISON); #endif #ifdef INET6 free(ip6, M_PRISON); #endif vfs_freeopts(opts); return (error); } /* * Sysctl nodes to describe jail parameters. Maximum length of string * parameters is returned in the string itself, and the other parameters * exist merely to make themselves and their types known. */ SYSCTL_NODE(_security_jail, OID_AUTO, param, CTLFLAG_RW, 0, "Jail parameters"); int sysctl_jail_param(SYSCTL_HANDLER_ARGS) { int i; long l; size_t s; char numbuf[12]; switch (oidp->oid_kind & CTLTYPE) { case CTLTYPE_LONG: case CTLTYPE_ULONG: l = 0; #ifdef SCTL_MASK32 if (!(req->flags & SCTL_MASK32)) #endif return (SYSCTL_OUT(req, &l, sizeof(l))); case CTLTYPE_INT: case CTLTYPE_UINT: i = 0; return (SYSCTL_OUT(req, &i, sizeof(i))); case CTLTYPE_STRING: snprintf(numbuf, sizeof(numbuf), "%d", arg2); return (sysctl_handle_string(oidp, numbuf, sizeof(numbuf), req)); case CTLTYPE_STRUCT: s = (size_t)arg2; return (SYSCTL_OUT(req, &s, sizeof(s))); } return (0); } SYSCTL_JAIL_PARAM(, jid, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail ID"); SYSCTL_JAIL_PARAM_STRING(, name, CTLFLAG_RW, MAXHOSTNAMELEN, "Jail name"); SYSCTL_JAIL_PARAM(, cpuset, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail cpuset ID"); SYSCTL_JAIL_PARAM_STRING(, path, CTLFLAG_RD, MAXPATHLEN, "Jail root path"); SYSCTL_JAIL_PARAM(, securelevel, CTLTYPE_INT | CTLFLAG_RW, "I", "Jail secure level"); SYSCTL_JAIL_PARAM(, persist, CTLTYPE_INT | CTLFLAG_RW, "B", "Jail persistence"); SYSCTL_JAIL_PARAM(, dying, CTLTYPE_INT | CTLFLAG_RD, "B", "Jail is in the process of shutting down"); SYSCTL_JAIL_PARAM_NODE(host, "Jail host info"); SYSCTL_JAIL_PARAM_STRING(_host, hostname, CTLFLAG_RW, MAXHOSTNAMELEN, "Jail hostname"); #ifdef INET SYSCTL_JAIL_PARAM_NODE(ip4, "Jail IPv4 address virtualization"); SYSCTL_JAIL_PARAM_STRUCT(_ip4, addr, CTLFLAG_RW, sizeof(struct in_addr), "S,in_addr,a", "Jail IPv4 addresses"); #endif #ifdef INET6 SYSCTL_JAIL_PARAM_NODE(ip6, "Jail IPv6 address virtualization"); SYSCTL_JAIL_PARAM_STRUCT(_ip6, addr, CTLFLAG_RW, sizeof(struct in6_addr), "S,in6_addr,a", "Jail IPv6 addresses"); #endif /* * struct jail_get_args { * struct iovec *iovp; * unsigned int iovcnt; * int flags; * }; */ int jail_get(struct thread *td, struct jail_get_args *uap) { struct uio *auio; int error; /* Check that we have an even number of iovecs. */ if (uap->iovcnt & 1) return (EINVAL); error = copyinuio(uap->iovp, uap->iovcnt, &auio); if (error) return (error); error = kern_jail_get(td, auio, uap->flags); if (error == 0) error = copyout(auio->uio_iov, uap->iovp, uap->iovcnt * sizeof (struct iovec)); free(auio, M_IOV); return (error); } int kern_jail_get(struct thread *td, struct uio *optuio, int flags) { struct prison *pr; struct vfsopt *opt; struct vfsoptlist *opts; char *errmsg, *name; int error, errmsg_len, errmsg_pos, i, jid, len, locked, pos; if (flags & ~JAIL_GET_MASK) return (EINVAL); if (jailed(td->td_ucred)) { /* * Don't allow a jailed process to see any jails, * not even its own. */ vfs_opterror(opts, "jail not found"); return (ENOENT); } /* Get the parameter list. */ error = vfs_buildopts(optuio, &opts); if (error) return (error); errmsg_pos = vfs_getopt_pos(opts, "errmsg"); /* * Find the prison specified by one of: lastjid, jid, name. */ sx_slock(&allprison_lock); error = vfs_copyopt(opts, "lastjid", &jid, sizeof(jid)); if (error == 0) { TAILQ_FOREACH(pr, &allprison, pr_list) { if (pr->pr_id > jid) { mtx_lock(&pr->pr_mtx); if (pr->pr_ref > 0 && (pr->pr_uref > 0 || (flags & JAIL_DYING))) break; mtx_unlock(&pr->pr_mtx); } } if (pr != NULL) goto found_prison; error = ENOENT; vfs_opterror(opts, "no jail after %d", jid); goto done_unlock_list; } else if (error != ENOENT) goto done_unlock_list; error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); if (error == 0) { if (jid != 0) { pr = prison_find(jid); if (pr != NULL) { if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { mtx_unlock(&pr->pr_mtx); error = ENOENT; vfs_opterror(opts, "jail %d is dying", jid); goto done_unlock_list; } goto found_prison; } error = ENOENT; vfs_opterror(opts, "jail %d not found", jid); goto done_unlock_list; } } else if (error != ENOENT) goto done_unlock_list; error = vfs_getopt(opts, "name", (void **)&name, &len); if (error == 0) { if (len == 0 || name[len - 1] != '\0') { error = EINVAL; goto done_unlock_list; } pr = prison_find_name(name); if (pr != NULL) { if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { mtx_unlock(&pr->pr_mtx); error = ENOENT; vfs_opterror(opts, "jail \"%s\" is dying", name); goto done_unlock_list; } goto found_prison; } error = ENOENT; vfs_opterror(opts, "jail \"%s\" not found", name); goto done_unlock_list; } else if (error != ENOENT) goto done_unlock_list; vfs_opterror(opts, "no jail specified"); error = ENOENT; goto done_unlock_list; found_prison: /* Get the parameters of the prison. */ pr->pr_ref++; locked = PD_LOCKED; td->td_retval[0] = pr->pr_id; error = vfs_setopt(opts, "jid", &pr->pr_id, sizeof(pr->pr_id)); if (error != 0 && error != ENOENT) goto done_deref; error = vfs_setopts(opts, "name", pr->pr_name); if (error != 0 && error != ENOENT) goto done_deref; error = vfs_setopt(opts, "cpuset", &pr->pr_cpuset->cs_id, sizeof(pr->pr_cpuset->cs_id)); if (error != 0 && error != ENOENT) goto done_deref; error = vfs_setopts(opts, "path", pr->pr_path); if (error != 0 && error != ENOENT) goto done_deref; #ifdef INET error = vfs_setopt_part(opts, "ip4.addr", pr->pr_ip4, pr->pr_ip4s * sizeof(*pr->pr_ip4)); if (error != 0 && error != ENOENT) goto done_deref; #endif #ifdef INET6 error = vfs_setopt_part(opts, "ip6.addr", pr->pr_ip6, pr->pr_ip6s * sizeof(*pr->pr_ip6)); if (error != 0 && error != ENOENT) goto done_deref; #endif error = vfs_setopt(opts, "securelevel", &pr->pr_securelevel, sizeof(pr->pr_securelevel)); if (error != 0 && error != ENOENT) goto done_deref; error = vfs_setopts(opts, "host.hostname", pr->pr_host); if (error != 0 && error != ENOENT) goto done_deref; i = pr->pr_flags & PR_PERSIST ? 1 : 0; error = vfs_setopt(opts, "persist", &i, sizeof(i)); if (error != 0 && error != ENOENT) goto done_deref; i = !i; error = vfs_setopt(opts, "nopersist", &i, sizeof(i)); if (error != 0 && error != ENOENT) goto done_deref; i = (pr->pr_uref == 0); error = vfs_setopt(opts, "dying", &i, sizeof(i)); if (error != 0 && error != ENOENT) goto done_deref; i = !i; error = vfs_setopt(opts, "nodying", &i, sizeof(i)); if (error != 0 && error != ENOENT) goto done_deref; /* Get the module parameters. */ mtx_unlock(&pr->pr_mtx); locked = 0; error = osd_jail_call(pr, PR_METHOD_GET, opts); if (error) goto done_deref; prison_deref(pr, PD_DEREF | PD_LIST_SLOCKED); /* By now, all parameters should have been noted. */ TAILQ_FOREACH(opt, opts, link) { if (!opt->seen && strcmp(opt->name, "errmsg")) { error = EINVAL; vfs_opterror(opts, "unknown parameter: %s", opt->name); goto done_errmsg; } } /* Write the fetched parameters back to userspace. */ error = 0; TAILQ_FOREACH(opt, opts, link) { if (opt->pos >= 0 && opt->pos != errmsg_pos) { pos = 2 * opt->pos + 1; optuio->uio_iov[pos].iov_len = opt->len; if (opt->value != NULL) { if (optuio->uio_segflg == UIO_SYSSPACE) { bcopy(opt->value, optuio->uio_iov[pos].iov_base, opt->len); } else { error = copyout(opt->value, optuio->uio_iov[pos].iov_base, opt->len); if (error) break; } } } } goto done_errmsg; done_deref: prison_deref(pr, locked | PD_DEREF | PD_LIST_SLOCKED); goto done_errmsg; done_unlock_list: sx_sunlock(&allprison_lock); done_errmsg: if (error && errmsg_pos >= 0) { vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); errmsg_pos = 2 * errmsg_pos + 1; if (errmsg_len > 0) { if (optuio->uio_segflg == UIO_SYSSPACE) bcopy(errmsg, optuio->uio_iov[errmsg_pos].iov_base, errmsg_len); else copyout(errmsg, optuio->uio_iov[errmsg_pos].iov_base, errmsg_len); } } vfs_freeopts(opts); return (error); } /* * struct jail_remove_args { * int jid; * }; */ int jail_remove(struct thread *td, struct jail_remove_args *uap) { struct prison *pr; struct proc *p; int deuref, error; error = priv_check(td, PRIV_JAIL_REMOVE); if (error) return (error); sx_xlock(&allprison_lock); pr = prison_find(uap->jid); if (pr == NULL) { sx_xunlock(&allprison_lock); return (EINVAL); } /* If the prison was persistent, it is not anymore. */ deuref = 0; if (pr->pr_flags & PR_PERSIST) { pr->pr_ref--; deuref = PD_DEUREF; pr->pr_flags &= ~PR_PERSIST; } /* If there are no references left, remove the prison now. */ if (pr->pr_ref == 0) { prison_deref(pr, deuref | PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); return (0); } /* * Keep a temporary reference to make sure this prison sticks around. */ pr->pr_ref++; mtx_unlock(&pr->pr_mtx); sx_xunlock(&allprison_lock); /* * Kill all processes unfortunate enough to be attached to this prison. */ sx_slock(&allproc_lock); LIST_FOREACH(p, &allproc, p_list) { PROC_LOCK(p); if (p->p_state != PRS_NEW && p->p_ucred && p->p_ucred->cr_prison == pr) psignal(p, SIGKILL); PROC_UNLOCK(p); } sx_sunlock(&allproc_lock); /* Remove the temporary reference. */ prison_deref(pr, deuref | PD_DEREF); return (0); } /* * struct jail_attach_args { * int jid; * }; */ int jail_attach(struct thread *td, struct jail_attach_args *uap) { struct prison *pr; int error; error = priv_check(td, PRIV_JAIL_ATTACH); if (error) return (error); sx_slock(&allprison_lock); pr = prison_find(uap->jid); if (pr == NULL) { sx_sunlock(&allprison_lock); return (EINVAL); } /* * Do not allow a process to attach to a prison that is not * considered to be "alive". */ if (pr->pr_uref == 0) { mtx_unlock(&pr->pr_mtx); sx_sunlock(&allprison_lock); return (EINVAL); } return (do_jail_attach(td, pr)); } static int do_jail_attach(struct thread *td, struct prison *pr) { struct proc *p; struct ucred *newcred, *oldcred; int vfslocked, error; /* * XXX: Note that there is a slight race here if two threads * in the same privileged process attempt to attach to two * different jails at the same time. It is important for * user processes not to do this, or they might end up with * a process root from one prison, but attached to the jail * of another. */ pr->pr_ref++; pr->pr_uref++; mtx_unlock(&pr->pr_mtx); /* Let modules do whatever they need to prepare for attaching. */ error = osd_jail_call(pr, PR_METHOD_ATTACH, td); if (error) { prison_deref(pr, PD_DEREF | PD_DEUREF | PD_LIST_SLOCKED); return (error); } sx_sunlock(&allprison_lock); /* * Reparent the newly attached process to this jail. */ p = td->td_proc; error = cpuset_setproc_update_set(p, pr->pr_cpuset); if (error) goto e_revert_osd; vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); vn_lock(pr->pr_root, LK_EXCLUSIVE | LK_RETRY); if ((error = change_dir(pr->pr_root, td)) != 0) goto e_unlock; #ifdef MAC if ((error = mac_vnode_check_chroot(td->td_ucred, pr->pr_root))) goto e_unlock; #endif VOP_UNLOCK(pr->pr_root, 0); if ((error = change_root(pr->pr_root, td))) goto e_unlock_giant; VFS_UNLOCK_GIANT(vfslocked); newcred = crget(); PROC_LOCK(p); oldcred = p->p_ucred; setsugid(p); crcopy(newcred, oldcred); newcred->cr_prison = pr; p->p_ucred = newcred; PROC_UNLOCK(p); crfree(oldcred); return (0); e_unlock: VOP_UNLOCK(pr->pr_root, 0); e_unlock_giant: VFS_UNLOCK_GIANT(vfslocked); e_revert_osd: /* Tell modules this thread is still in its old jail after all. */ (void)osd_jail_call(td->td_ucred->cr_prison, PR_METHOD_ATTACH, td); prison_deref(pr, PD_DEREF | PD_DEUREF); return (error); } /* * Returns a locked prison instance, or NULL on failure. */ struct prison * prison_find(int prid) { struct prison *pr; sx_assert(&allprison_lock, SX_LOCKED); TAILQ_FOREACH(pr, &allprison, pr_list) { if (pr->pr_id == prid) { mtx_lock(&pr->pr_mtx); if (pr->pr_ref > 0) return (pr); mtx_unlock(&pr->pr_mtx); } } return (NULL); } /* * Look for the named prison. Returns a locked prison or NULL. */ struct prison * prison_find_name(const char *name) { struct prison *pr, *deadpr; sx_assert(&allprison_lock, SX_LOCKED); again: deadpr = NULL; TAILQ_FOREACH(pr, &allprison, pr_list) { if (!strcmp(pr->pr_name, name)) { mtx_lock(&pr->pr_mtx); if (pr->pr_ref > 0) { if (pr->pr_uref > 0) return (pr); deadpr = pr; } mtx_unlock(&pr->pr_mtx); } } /* There was no valid prison - perhaps there was a dying one */ if (deadpr != NULL) { mtx_lock(&deadpr->pr_mtx); if (deadpr->pr_ref == 0) { mtx_unlock(&deadpr->pr_mtx); goto again; } } return (deadpr); } /* * Remove a prison reference. If that was the last reference, remove the * prison itself - but not in this context in case there are locks held. */ void prison_free_locked(struct prison *pr) { mtx_assert(&pr->pr_mtx, MA_OWNED); pr->pr_ref--; if (pr->pr_ref == 0) { mtx_unlock(&pr->pr_mtx); TASK_INIT(&pr->pr_task, 0, prison_complete, pr); taskqueue_enqueue(taskqueue_thread, &pr->pr_task); return; } mtx_unlock(&pr->pr_mtx); } void prison_free(struct prison *pr) { mtx_lock(&pr->pr_mtx); prison_free_locked(pr); } static void prison_complete(void *context, int pending) { prison_deref((struct prison *)context, 0); } /* * Remove a prison reference (usually). This internal version assumes no * mutexes are held, except perhaps the prison itself. If there are no more * references, release and delist the prison. On completion, the prison lock * and the allprison lock are both unlocked. */ static void prison_deref(struct prison *pr, int flags) { int vfslocked; if (!(flags & PD_LOCKED)) mtx_lock(&pr->pr_mtx); if (flags & PD_DEUREF) { pr->pr_uref--; /* Done if there were only user references to remove. */ if (!(flags & PD_DEREF)) { mtx_unlock(&pr->pr_mtx); if (flags & PD_LIST_SLOCKED) sx_sunlock(&allprison_lock); else if (flags & PD_LIST_XLOCKED) sx_xunlock(&allprison_lock); return; } } if (flags & PD_DEREF) pr->pr_ref--; /* If the prison still has references, nothing else to do. */ if (pr->pr_ref > 0) { mtx_unlock(&pr->pr_mtx); if (flags & PD_LIST_SLOCKED) sx_sunlock(&allprison_lock); else if (flags & PD_LIST_XLOCKED) sx_xunlock(&allprison_lock); return; } KASSERT(pr->pr_uref == 0, ("%s: Trying to remove an active prison (jid=%d).", __func__, pr->pr_id)); mtx_unlock(&pr->pr_mtx); if (flags & PD_LIST_SLOCKED) { if (!sx_try_upgrade(&allprison_lock)) { sx_sunlock(&allprison_lock); sx_xlock(&allprison_lock); } } else if (!(flags & PD_LIST_XLOCKED)) sx_xlock(&allprison_lock); TAILQ_REMOVE(&allprison, pr, pr_list); prisoncount--; sx_xunlock(&allprison_lock); if (pr->pr_root != NULL) { vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); vrele(pr->pr_root); VFS_UNLOCK_GIANT(vfslocked); } mtx_destroy(&pr->pr_mtx); #ifdef INET free(pr->pr_ip4, M_PRISON); #endif #ifdef INET6 free(pr->pr_ip6, M_PRISON); #endif if (pr->pr_cpuset != NULL) cpuset_rel(pr->pr_cpuset); osd_jail_exit(pr); free(pr, M_PRISON); } void prison_hold_locked(struct prison *pr) { mtx_assert(&pr->pr_mtx, MA_OWNED); KASSERT(pr->pr_ref > 0, ("Trying to hold dead prison (jid=%d).", pr->pr_id)); pr->pr_ref++; } void prison_hold(struct prison *pr) { mtx_lock(&pr->pr_mtx); prison_hold_locked(pr); mtx_unlock(&pr->pr_mtx); } void prison_proc_hold(struct prison *pr) { mtx_lock(&pr->pr_mtx); KASSERT(pr->pr_uref > 0, ("Cannot add a process to a non-alive prison (jid=%d)", pr->pr_id)); pr->pr_uref++; mtx_unlock(&pr->pr_mtx); } void prison_proc_free(struct prison *pr) { mtx_lock(&pr->pr_mtx); KASSERT(pr->pr_uref > 0, ("Trying to kill a process in a dead prison (jid=%d)", pr->pr_id)); prison_deref(pr, PD_DEUREF | PD_LOCKED); } #ifdef INET /* * Pass back primary IPv4 address of this jail. * * If not jailed return success but do not alter the address. Caller has to * make sure to initialize it correctly (e.g. INADDR_ANY). * * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. * Address returned in NBO. */ int prison_get_ip4(struct ucred *cred, struct in_addr *ia) { struct prison *pr; KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); if (!jailed(cred)) return (0); pr = cred->cr_prison; mtx_lock(&pr->pr_mtx); if (pr->pr_ip4 == NULL) { mtx_unlock(&pr->pr_mtx); return (EAFNOSUPPORT); } ia->s_addr = pr->pr_ip4[0].s_addr; mtx_unlock(&pr->pr_mtx); return (0); } /* * Make sure our (source) address is set to something meaningful to this * jail. * * Returns 0 if not jailed or if address belongs to jail, EADDRNOTAVAIL if * the address doesn't belong, or EAFNOSUPPORT if the jail doesn't allow IPv4. * Address passed in in NBO and returned in NBO. */ int prison_local_ip4(struct ucred *cred, struct in_addr *ia) { struct prison *pr; struct in_addr ia0; int error; KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); if (!jailed(cred)) return (0); pr = cred->cr_prison; mtx_lock(&pr->pr_mtx); if (pr->pr_ip4 == NULL) { mtx_unlock(&pr->pr_mtx); return (EAFNOSUPPORT); } ia0.s_addr = ntohl(ia->s_addr); if (ia0.s_addr == INADDR_LOOPBACK) { ia->s_addr = pr->pr_ip4[0].s_addr; mtx_unlock(&pr->pr_mtx); return (0); } if (ia0.s_addr == INADDR_ANY) { /* * In case there is only 1 IPv4 address, bind directly. */ if (pr->pr_ip4s == 1) ia->s_addr = pr->pr_ip4[0].s_addr; mtx_unlock(&pr->pr_mtx); return (0); } error = _prison_check_ip4(pr, ia); mtx_unlock(&pr->pr_mtx); return (error); } /* * Rewrite destination address in case we will connect to loopback address. * * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. * Address passed in in NBO and returned in NBO. */ int prison_remote_ip4(struct ucred *cred, struct in_addr *ia) { struct prison *pr; KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); if (!jailed(cred)) return (0); pr = cred->cr_prison; mtx_lock(&pr->pr_mtx); if (pr->pr_ip4 == NULL) { mtx_unlock(&pr->pr_mtx); return (EAFNOSUPPORT); } if (ntohl(ia->s_addr) == INADDR_LOOPBACK) { ia->s_addr = pr->pr_ip4[0].s_addr; mtx_unlock(&pr->pr_mtx); return (0); } /* * Return success because nothing had to be changed. */ mtx_unlock(&pr->pr_mtx); return (0); } /* * Check if given address belongs to the jail referenced by cred/prison. * * Returns 0 if not jailed or if address belongs to jail, EADDRNOTAVAIL if * the address doesn't belong, or EAFNOSUPPORT if the jail doesn't allow IPv4. * Address passed in in NBO. */ static int _prison_check_ip4(struct prison *pr, struct in_addr *ia) { int i, a, z, d; /* * Check the primary IP. */ if (pr->pr_ip4[0].s_addr == ia->s_addr) return (0); /* * All the other IPs are sorted so we can do a binary search. */ a = 0; z = pr->pr_ip4s - 2; while (a <= z) { i = (a + z) / 2; d = qcmp_v4(&pr->pr_ip4[i+1], ia); if (d > 0) z = i - 1; else if (d < 0) a = i + 1; else return (0); } return (EADDRNOTAVAIL); } int prison_check_ip4(struct ucred *cred, struct in_addr *ia) { struct prison *pr; int error; KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); if (!jailed(cred)) return (0); pr = cred->cr_prison; mtx_lock(&pr->pr_mtx); if (pr->pr_ip4 == NULL) { mtx_unlock(&pr->pr_mtx); return (EAFNOSUPPORT); } error = _prison_check_ip4(pr, ia); mtx_unlock(&pr->pr_mtx); return (error); } #endif #ifdef INET6 /* * Pass back primary IPv6 address for this jail. * * If not jailed return success but do not alter the address. Caller has to * make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT). * * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. */ int prison_get_ip6(struct ucred *cred, struct in6_addr *ia6) { struct prison *pr; KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); if (!jailed(cred)) return (0); pr = cred->cr_prison; mtx_lock(&pr->pr_mtx); if (pr->pr_ip6 == NULL) { mtx_unlock(&pr->pr_mtx); return (EAFNOSUPPORT); } bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); mtx_unlock(&pr->pr_mtx); return (0); } /* * Make sure our (source) address is set to something meaningful to this jail. * * v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0) * when needed while binding. * * Returns 0 if not jailed or if address belongs to jail, EADDRNOTAVAIL if * the address doesn't belong, or EAFNOSUPPORT if the jail doesn't allow IPv6. */ int prison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only) { struct prison *pr; int error; KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); if (!jailed(cred)) return (0); pr = cred->cr_prison; mtx_lock(&pr->pr_mtx); if (pr->pr_ip6 == NULL) { mtx_unlock(&pr->pr_mtx); return (EAFNOSUPPORT); } if (IN6_IS_ADDR_LOOPBACK(ia6)) { bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); mtx_unlock(&pr->pr_mtx); return (0); } if (IN6_IS_ADDR_UNSPECIFIED(ia6)) { /* * In case there is only 1 IPv6 address, and v6only is true, * then bind directly. */ if (v6only != 0 && pr->pr_ip6s == 1) bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); mtx_unlock(&pr->pr_mtx); return (0); } error = _prison_check_ip6(pr, ia6); mtx_unlock(&pr->pr_mtx); return (error); } /* * Rewrite destination address in case we will connect to loopback address. * * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. */ int prison_remote_ip6(struct ucred *cred, struct in6_addr *ia6) { struct prison *pr; KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); if (!jailed(cred)) return (0); pr = cred->cr_prison; mtx_lock(&pr->pr_mtx); if (pr->pr_ip6 == NULL) { mtx_unlock(&pr->pr_mtx); return (EAFNOSUPPORT); } if (IN6_IS_ADDR_LOOPBACK(ia6)) { bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); mtx_unlock(&pr->pr_mtx); return (0); } /* * Return success because nothing had to be changed. */ mtx_unlock(&pr->pr_mtx); return (0); } /* * Check if given address belongs to the jail referenced by cred/prison. * * Returns 0 if not jailed or if address belongs to jail, EADDRNOTAVAIL if * the address doesn't belong, or EAFNOSUPPORT if the jail doesn't allow IPv6. */ static int _prison_check_ip6(struct prison *pr, struct in6_addr *ia6) { int i, a, z, d; /* * Check the primary IP. */ if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], ia6)) return (0); /* * All the other IPs are sorted so we can do a binary search. */ a = 0; z = pr->pr_ip6s - 2; while (a <= z) { i = (a + z) / 2; d = qcmp_v6(&pr->pr_ip6[i+1], ia6); if (d > 0) z = i - 1; else if (d < 0) a = i + 1; else return (0); } return (EADDRNOTAVAIL); } int prison_check_ip6(struct ucred *cred, struct in6_addr *ia6) { struct prison *pr; int error; KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); if (!jailed(cred)) return (0); pr = cred->cr_prison; mtx_lock(&pr->pr_mtx); if (pr->pr_ip6 == NULL) { mtx_unlock(&pr->pr_mtx); return (EAFNOSUPPORT); } error = _prison_check_ip6(pr, ia6); mtx_unlock(&pr->pr_mtx); return (error); } #endif /* * Check if a jail supports the given address family. * * Returns 0 if not jailed or the address family is supported, EAFNOSUPPORT * if not. */ int prison_check_af(struct ucred *cred, int af) { int error; KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); if (!jailed(cred)) return (0); error = 0; switch (af) { #ifdef INET case AF_INET: if (cred->cr_prison->pr_ip4 == NULL) error = EAFNOSUPPORT; break; #endif #ifdef INET6 case AF_INET6: if (cred->cr_prison->pr_ip6 == NULL) error = EAFNOSUPPORT; break; #endif case AF_LOCAL: case AF_ROUTE: break; default: if (jail_socket_unixiproute_only) error = EAFNOSUPPORT; } return (error); } /* * Check if given address belongs to the jail referenced by cred (wrapper to * prison_check_ip[46]). * * Returns 0 if not jailed or if address belongs to jail, EADDRNOTAVAIL if * the address doesn't belong, or EAFNOSUPPORT if the jail doesn't allow * the address family. IPv4 Address passed in in NBO. */ int prison_if(struct ucred *cred, struct sockaddr *sa) { #ifdef INET struct sockaddr_in *sai; #endif #ifdef INET6 struct sockaddr_in6 *sai6; #endif int error; KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); KASSERT(sa != NULL, ("%s: sa is NULL", __func__)); error = 0; switch (sa->sa_family) { #ifdef INET case AF_INET: sai = (struct sockaddr_in *)sa; error = prison_check_ip4(cred, &sai->sin_addr); break; #endif #ifdef INET6 case AF_INET6: sai6 = (struct sockaddr_in6 *)sa; error = prison_check_ip6(cred, &sai6->sin6_addr); break; #endif default: if (jailed(cred) && jail_socket_unixiproute_only) error = EAFNOSUPPORT; } return (error); } /* * Return 0 if jails permit p1 to frob p2, otherwise ESRCH. */ int prison_check(struct ucred *cred1, struct ucred *cred2) { if (jailed(cred1)) { if (!jailed(cred2)) return (ESRCH); if (cred2->cr_prison != cred1->cr_prison) return (ESRCH); } return (0); } /* * Return 1 if the passed credential is in a jail, otherwise 0. */ int jailed(struct ucred *cred) { return (cred->cr_prison != NULL); } /* * Return the correct hostname for the passed credential. */ void getcredhostname(struct ucred *cred, char *buf, size_t size) { INIT_VPROCG(cred->cr_vimage->v_procg); if (jailed(cred)) { mtx_lock(&cred->cr_prison->pr_mtx); strlcpy(buf, cred->cr_prison->pr_host, size); mtx_unlock(&cred->cr_prison->pr_mtx); } else { mtx_lock(&hostname_mtx); strlcpy(buf, V_hostname, size); mtx_unlock(&hostname_mtx); } } /* * Determine whether the subject represented by cred can "see" * status of a mount point. * Returns: 0 for permitted, ENOENT otherwise. * XXX: This function should be called cr_canseemount() and should be * placed in kern_prot.c. */ int prison_canseemount(struct ucred *cred, struct mount *mp) { struct prison *pr; struct statfs *sp; size_t len; if (!jailed(cred) || jail_enforce_statfs == 0) return (0); pr = cred->cr_prison; if (pr->pr_root->v_mount == mp) return (0); if (jail_enforce_statfs == 2) return (ENOENT); /* * If jail's chroot directory is set to "/" we should be able to see * all mount-points from inside a jail. * This is ugly check, but this is the only situation when jail's * directory ends with '/'. */ if (strcmp(pr->pr_path, "/") == 0) return (0); len = strlen(pr->pr_path); sp = &mp->mnt_stat; if (strncmp(pr->pr_path, sp->f_mntonname, len) != 0) return (ENOENT); /* * Be sure that we don't have situation where jail's root directory * is "/some/path" and mount point is "/some/pathpath". */ if (sp->f_mntonname[len] != '\0' && sp->f_mntonname[len] != '/') return (ENOENT); return (0); } void prison_enforce_statfs(struct ucred *cred, struct mount *mp, struct statfs *sp) { char jpath[MAXPATHLEN]; struct prison *pr; size_t len; if (!jailed(cred) || jail_enforce_statfs == 0) return; pr = cred->cr_prison; if (prison_canseemount(cred, mp) != 0) { bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); strlcpy(sp->f_mntonname, "[restricted]", sizeof(sp->f_mntonname)); return; } if (pr->pr_root->v_mount == mp) { /* * Clear current buffer data, so we are sure nothing from * the valid path left there. */ bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); *sp->f_mntonname = '/'; return; } /* * If jail's chroot directory is set to "/" we should be able to see * all mount-points from inside a jail. */ if (strcmp(pr->pr_path, "/") == 0) return; len = strlen(pr->pr_path); strlcpy(jpath, sp->f_mntonname + len, sizeof(jpath)); /* * Clear current buffer data, so we are sure nothing from * the valid path left there. */ bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); if (*jpath == '\0') { /* Should never happen. */ *sp->f_mntonname = '/'; } else { strlcpy(sp->f_mntonname, jpath, sizeof(sp->f_mntonname)); } } /* * Check with permission for a specific privilege is granted within jail. We * have a specific list of accepted privileges; the rest are denied. */ int prison_priv_check(struct ucred *cred, int priv) { if (!jailed(cred)) return (0); switch (priv) { /* * Allow ktrace privileges for root in jail. */ case PRIV_KTRACE: #if 0 /* * Allow jailed processes to configure audit identity and * submit audit records (login, etc). In the future we may * want to further refine the relationship between audit and * jail. */ case PRIV_AUDIT_GETAUDIT: case PRIV_AUDIT_SETAUDIT: case PRIV_AUDIT_SUBMIT: #endif /* * Allow jailed processes to manipulate process UNIX * credentials in any way they see fit. */ case PRIV_CRED_SETUID: case PRIV_CRED_SETEUID: case PRIV_CRED_SETGID: case PRIV_CRED_SETEGID: case PRIV_CRED_SETGROUPS: case PRIV_CRED_SETREUID: case PRIV_CRED_SETREGID: case PRIV_CRED_SETRESUID: case PRIV_CRED_SETRESGID: /* * Jail implements visibility constraints already, so allow * jailed root to override uid/gid-based constraints. */ case PRIV_SEEOTHERGIDS: case PRIV_SEEOTHERUIDS: /* * Jail implements inter-process debugging limits already, so * allow jailed root various debugging privileges. */ case PRIV_DEBUG_DIFFCRED: case PRIV_DEBUG_SUGID: case PRIV_DEBUG_UNPRIV: /* * Allow jail to set various resource limits and login * properties, and for now, exceed process resource limits. */ case PRIV_PROC_LIMIT: case PRIV_PROC_SETLOGIN: case PRIV_PROC_SETRLIMIT: /* * System V and POSIX IPC privileges are granted in jail. */ case PRIV_IPC_READ: case PRIV_IPC_WRITE: case PRIV_IPC_ADMIN: case PRIV_IPC_MSGSIZE: case PRIV_MQ_ADMIN: /* * Jail implements its own inter-process limits, so allow * root processes in jail to change scheduling on other * processes in the same jail. Likewise for signalling. */ case PRIV_SCHED_DIFFCRED: case PRIV_SCHED_CPUSET: case PRIV_SIGNAL_DIFFCRED: case PRIV_SIGNAL_SUGID: /* * Allow jailed processes to write to sysctls marked as jail * writable. */ case PRIV_SYSCTL_WRITEJAIL: /* * Allow root in jail to manage a variety of quota * properties. These should likely be conditional on a * configuration option. */ case PRIV_VFS_GETQUOTA: case PRIV_VFS_SETQUOTA: /* * Since Jail relies on chroot() to implement file system * protections, grant many VFS privileges to root in jail. * Be careful to exclude mount-related and NFS-related * privileges. */ case PRIV_VFS_READ: case PRIV_VFS_WRITE: case PRIV_VFS_ADMIN: case PRIV_VFS_EXEC: case PRIV_VFS_LOOKUP: case PRIV_VFS_BLOCKRESERVE: /* XXXRW: Slightly surprising. */ case PRIV_VFS_CHFLAGS_DEV: case PRIV_VFS_CHOWN: case PRIV_VFS_CHROOT: case PRIV_VFS_RETAINSUGID: case PRIV_VFS_FCHROOT: case PRIV_VFS_LINK: case PRIV_VFS_SETGID: case PRIV_VFS_STAT: case PRIV_VFS_STICKYFILE: return (0); /* * Depending on the global setting, allow privilege of * setting system flags. */ case PRIV_VFS_SYSFLAGS: if (jail_chflags_allowed) return (0); else return (EPERM); /* * Depending on the global setting, allow privilege of * mounting/unmounting file systems. */ case PRIV_VFS_MOUNT: case PRIV_VFS_UNMOUNT: case PRIV_VFS_MOUNT_NONUSER: case PRIV_VFS_MOUNT_OWNER: if (jail_mount_allowed) return (0); else return (EPERM); /* * Allow jailed root to bind reserved ports and reuse in-use * ports. */ case PRIV_NETINET_RESERVEDPORT: case PRIV_NETINET_REUSEPORT: return (0); /* * Allow jailed root to set certian IPv4/6 (option) headers. */ case PRIV_NETINET_SETHDROPTS: return (0); /* * Conditionally allow creating raw sockets in jail. */ case PRIV_NETINET_RAW: if (jail_allow_raw_sockets) return (0); else return (EPERM); /* * Since jail implements its own visibility limits on netstat * sysctls, allow getcred. This allows identd to work in * jail. */ case PRIV_NETINET_GETCRED: return (0); default: /* * In all remaining cases, deny the privilege request. This * includes almost all network privileges, many system * configuration privileges. */ return (EPERM); } } static int sysctl_jail_list(SYSCTL_HANDLER_ARGS) { struct xprison *xp; struct prison *pr; #ifdef INET struct in_addr *ip4 = NULL; int ip4s = 0; #endif #ifdef INET6 struct in_addr *ip6 = NULL; int ip6s = 0; #endif int error; if (jailed(req->td->td_ucred)) return (0); xp = malloc(sizeof(*xp), M_TEMP, M_WAITOK); error = 0; sx_slock(&allprison_lock); TAILQ_FOREACH(pr, &allprison, pr_list) { again: mtx_lock(&pr->pr_mtx); #ifdef INET if (pr->pr_ip4s > 0) { if (ip4s < pr->pr_ip4s) { ip4s = pr->pr_ip4s; mtx_unlock(&pr->pr_mtx); ip4 = realloc(ip4, ip4s * sizeof(struct in_addr), M_TEMP, M_WAITOK); goto again; } bcopy(pr->pr_ip4, ip4, pr->pr_ip4s * sizeof(struct in_addr)); } #endif #ifdef INET6 if (pr->pr_ip6s > 0) { if (ip6s < pr->pr_ip6s) { ip6s = pr->pr_ip6s; mtx_unlock(&pr->pr_mtx); ip6 = realloc(ip6, ip6s * sizeof(struct in6_addr), M_TEMP, M_WAITOK); goto again; } bcopy(pr->pr_ip6, ip6, pr->pr_ip6s * sizeof(struct in6_addr)); } #endif if (pr->pr_ref == 0) { mtx_unlock(&pr->pr_mtx); continue; } bzero(xp, sizeof(*xp)); xp->pr_version = XPRISON_VERSION; xp->pr_id = pr->pr_id; xp->pr_state = pr->pr_uref > 0 ? PRISON_STATE_ALIVE : PRISON_STATE_DYING; strlcpy(xp->pr_path, pr->pr_path, sizeof(xp->pr_path)); strlcpy(xp->pr_host, pr->pr_host, sizeof(xp->pr_host)); strlcpy(xp->pr_name, pr->pr_name, sizeof(xp->pr_name)); #ifdef INET xp->pr_ip4s = pr->pr_ip4s; #endif #ifdef INET6 xp->pr_ip6s = pr->pr_ip6s; #endif mtx_unlock(&pr->pr_mtx); error = SYSCTL_OUT(req, xp, sizeof(*xp)); if (error) break; #ifdef INET if (xp->pr_ip4s > 0) { error = SYSCTL_OUT(req, ip4, xp->pr_ip4s * sizeof(struct in_addr)); if (error) break; } #endif #ifdef INET6 if (xp->pr_ip6s > 0) { error = SYSCTL_OUT(req, ip6, xp->pr_ip6s * sizeof(struct in6_addr)); if (error) break; } #endif } sx_sunlock(&allprison_lock); free(xp, M_TEMP); #ifdef INET free(ip4, M_TEMP); #endif #ifdef INET6 free(ip6, M_TEMP); #endif return (error); } SYSCTL_OID(_security_jail, OID_AUTO, list, CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, sysctl_jail_list, "S", "List of active jails"); static int sysctl_jail_jailed(SYSCTL_HANDLER_ARGS) { int error, injail; injail = jailed(req->td->td_ucred); error = SYSCTL_OUT(req, &injail, sizeof(injail)); return (error); } SYSCTL_PROC(_security_jail, OID_AUTO, jailed, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, sysctl_jail_jailed, "I", "Process in jail?"); #ifdef DDB static void db_show_prison(struct prison *pr) { #if defined(INET) || defined(INET6) int ii; #endif #ifdef INET6 char ip6buf[INET6_ADDRSTRLEN]; #endif db_printf("prison %p:\n", pr); db_printf(" jid = %d\n", pr->pr_id); db_printf(" name = %s\n", pr->pr_name); db_printf(" ref = %d\n", pr->pr_ref); db_printf(" uref = %d\n", pr->pr_uref); db_printf(" path = %s\n", pr->pr_path); db_printf(" cpuset = %d\n", pr->pr_cpuset ? pr->pr_cpuset->cs_id : -1); db_printf(" root = %p\n", pr->pr_root); db_printf(" securelevel = %d\n", pr->pr_securelevel); db_printf(" flags = %x", pr->pr_flags); if (pr->pr_flags & PR_PERSIST) db_printf(" persist"); db_printf("\n"); db_printf(" host.hostname = %s\n", pr->pr_host); #ifdef INET db_printf(" ip4s = %d\n", pr->pr_ip4s); for (ii = 0; ii < pr->pr_ip4s; ii++) db_printf(" %s %s\n", ii == 0 ? "ip4 =" : " ", inet_ntoa(pr->pr_ip4[ii])); #endif #ifdef INET6 db_printf(" ip6s = %d\n", pr->pr_ip6s); for (ii = 0; ii < pr->pr_ip6s; ii++) db_printf(" %s %s\n", ii == 0 ? "ip6 =" : " ", ip6_sprintf(ip6buf, &pr->pr_ip6[ii])); #endif } DB_SHOW_COMMAND(prison, db_show_prison_command) { struct prison *pr; if (!have_addr) { /* Show all prisons in the list. */ TAILQ_FOREACH(pr, &allprison, pr_list) { db_show_prison(pr); if (db_pager_quit) break; } return; } /* Look for a prison with the ID and with references. */ TAILQ_FOREACH(pr, &allprison, pr_list) if (pr->pr_id == addr && pr->pr_ref > 0) break; if (pr == NULL) /* Look again, without requiring a reference. */ TAILQ_FOREACH(pr, &allprison, pr_list) if (pr->pr_id == addr) break; if (pr == NULL) /* Assume address points to a valid prison. */ pr = (struct prison *)addr; db_show_prison(pr); } #endif /* DDB */