/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. * * Copyright (c) 1983,1984,1985,1986,1987,1988,1989 AT&T. * All rights reserved. */ #pragma ident "%Z%%M% %I% %E% SMI" #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 #include #include #include #include #include #include #include #include #include #include #include /* * From rpcsec module (common/rpcsec). */ extern int sec_clnt_loadinfo(struct sec_data *, struct sec_data **, model_t); extern void sec_clnt_freeinfo(struct sec_data *); static int pathconf_get(struct mntinfo *, model_t, struct nfs_args *); static void pathconf_rele(struct mntinfo *); /* * The order and contents of this structure must be kept in sync with that of * rfsreqcnt_v2_tmpl in nfs_stats.c */ static char *rfsnames_v2[] = { "null", "getattr", "setattr", "unused", "lookup", "readlink", "read", "unused", "write", "create", "remove", "rename", "link", "symlink", "mkdir", "rmdir", "readdir", "fsstat" }; /* * This table maps from NFS protocol number into call type. * Zero means a "Lookup" type call * One means a "Read" type call * Two means a "Write" type call * This is used to select a default time-out. */ static uchar_t call_type_v2[] = { 0, 0, 1, 0, 0, 0, 1, 0, 2, 2, 2, 2, 2, 2, 2, 2, 1, 0 }; /* * Similar table, but to determine which timer to use * (only real reads and writes!) */ static uchar_t timer_type_v2[] = { 0, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 0, 0, 0, 0, 0, 1, 0 }; /* * This table maps from NFS protocol number into a call type * for the semisoft mount option. * Zero means do not repeat operation. * One means repeat. */ static uchar_t ss_call_type_v2[] = { 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0 }; /* * nfs vfs operations. */ static int nfs_mount(vfs_t *, vnode_t *, struct mounta *, cred_t *); static int nfs_unmount(vfs_t *, int, cred_t *); static int nfs_root(vfs_t *, vnode_t **); static int nfs_statvfs(vfs_t *, struct statvfs64 *); static int nfs_sync(vfs_t *, short, cred_t *); static int nfs_vget(vfs_t *, vnode_t **, fid_t *); static int nfs_mountroot(vfs_t *, whymountroot_t); static void nfs_freevfs(vfs_t *); static int nfsrootvp(vnode_t **, vfs_t *, struct servinfo *, int, cred_t *, zone_t *); /* * Initialize the vfs structure */ int nfsfstyp; vfsops_t *nfs_vfsops; /* * Debug variable to check for rdma based * transport startup and cleanup. Controlled * through /etc/system. Off by default. */ int rdma_debug = 0; int nfsinit(int fstyp, char *name) { static const fs_operation_def_t nfs_vfsops_template[] = { VFSNAME_MOUNT, nfs_mount, VFSNAME_UNMOUNT, nfs_unmount, VFSNAME_ROOT, nfs_root, VFSNAME_STATVFS, nfs_statvfs, VFSNAME_SYNC, (fs_generic_func_p) nfs_sync, VFSNAME_VGET, nfs_vget, VFSNAME_MOUNTROOT, nfs_mountroot, VFSNAME_FREEVFS, (fs_generic_func_p)nfs_freevfs, NULL, NULL }; int error; error = vfs_setfsops(fstyp, nfs_vfsops_template, &nfs_vfsops); if (error != 0) { zcmn_err(GLOBAL_ZONEID, CE_WARN, "nfsinit: bad vfs ops template"); return (error); } error = vn_make_ops(name, nfs_vnodeops_template, &nfs_vnodeops); if (error != 0) { (void) vfs_freevfsops_by_type(fstyp); zcmn_err(GLOBAL_ZONEID, CE_WARN, "nfsinit: bad vnode ops template"); return (error); } nfsfstyp = fstyp; return (0); } void nfsfini(void) { } /* * nfs mount vfsop * Set up mount info record and attach it to vfs struct. */ static int nfs_mount(vfs_t *vfsp, vnode_t *mvp, struct mounta *uap, cred_t *cr) { char *data = uap->dataptr; int error; vnode_t *rtvp; /* the server's root */ mntinfo_t *mi; /* mount info, pointed at by vfs */ size_t hlen; /* length of hostname */ size_t nlen; /* length of netname */ char netname[SYS_NMLN]; /* server's netname */ struct netbuf addr; /* server's address */ struct netbuf syncaddr; /* AUTH_DES time sync addr */ struct knetconfig *knconf; /* transport knetconfig structure */ struct knetconfig *rdma_knconf; /* rdma transport structure */ rnode_t *rp; struct servinfo *svp; /* nfs server info */ struct servinfo *svp_tail = NULL; /* previous nfs server info */ struct servinfo *svp_head; /* first nfs server info */ struct servinfo *svp_2ndlast; /* 2nd last in the server info list */ struct sec_data *secdata; /* security data */ STRUCT_DECL(nfs_args, args); /* nfs mount arguments */ STRUCT_DECL(knetconfig, knconf_tmp); STRUCT_DECL(netbuf, addr_tmp); int flags, addr_type; char *p, *pf; zone_t *zone = nfs_zone(); zone_t *mntzone = NULL; if ((error = secpolicy_fs_mount(cr, mvp, vfsp)) != 0) return (error); if (mvp->v_type != VDIR) return (ENOTDIR); /* * get arguments * * nfs_args is now versioned and is extensible, so * uap->datalen might be different from sizeof (args) * in a compatible situation. */ more: STRUCT_INIT(args, get_udatamodel()); bzero(STRUCT_BUF(args), SIZEOF_STRUCT(nfs_args, DATAMODEL_NATIVE)); if (copyin(data, STRUCT_BUF(args), MIN(uap->datalen, STRUCT_SIZE(args)))) return (EFAULT); flags = STRUCT_FGET(args, flags); if (uap->flags & MS_REMOUNT) { size_t n; char name[FSTYPSZ]; if (uap->flags & MS_SYSSPACE) error = copystr(uap->fstype, name, FSTYPSZ, &n); else error = copyinstr(uap->fstype, name, FSTYPSZ, &n); if (error) { if (error == ENAMETOOLONG) return (EINVAL); return (error); } /* * This check is to ensure that the request is a * genuine nfs remount request. */ if (strncmp(name, "nfs", 3) != 0) return (EINVAL); /* * If the request changes the locking type, disallow the * remount, * because it's questionable whether we can transfer the * locking state correctly. * * Remounts need to save the pathconf information. * Part of the infamous static kludge. */ if ((mi = VFTOMI(vfsp)) != NULL) { uint_t new_mi_llock; uint_t old_mi_llock; new_mi_llock = (flags & NFSMNT_LLOCK) ? 1 : 0; old_mi_llock = (mi->mi_flags & MI_LLOCK) ? 1 : 0; if (old_mi_llock != new_mi_llock) return (EBUSY); } return (pathconf_get((struct mntinfo *)vfsp->vfs_data, get_udatamodel(), STRUCT_BUF(args))); } mutex_enter(&mvp->v_lock); if (!(uap->flags & MS_OVERLAY) && (mvp->v_count != 1 || (mvp->v_flag & VROOT))) { mutex_exit(&mvp->v_lock); return (EBUSY); } mutex_exit(&mvp->v_lock); /* make sure things are zeroed for errout: */ rtvp = NULL; mi = NULL; addr.buf = NULL; syncaddr.buf = NULL; secdata = NULL; /* * A valid knetconfig structure is required. */ if (!(flags & NFSMNT_KNCONF)) return (EINVAL); /* * Allocate a servinfo struct. */ svp = kmem_zalloc(sizeof (*svp), KM_SLEEP); mutex_init(&svp->sv_lock, NULL, MUTEX_DEFAULT, NULL); if (svp_tail) { svp_2ndlast = svp_tail; svp_tail->sv_next = svp; } else { svp_head = svp; svp_2ndlast = svp; } svp_tail = svp; /* * Allocate space for a knetconfig structure and * its strings and copy in from user-land. */ knconf = kmem_zalloc(sizeof (*knconf), KM_SLEEP); svp->sv_knconf = knconf; STRUCT_INIT(knconf_tmp, get_udatamodel()); if (copyin(STRUCT_FGETP(args, knconf), STRUCT_BUF(knconf_tmp), STRUCT_SIZE(knconf_tmp))) { sv_free(svp_head); return (EFAULT); } knconf->knc_semantics = STRUCT_FGET(knconf_tmp, knc_semantics); knconf->knc_protofmly = STRUCT_FGETP(knconf_tmp, knc_protofmly); knconf->knc_proto = STRUCT_FGETP(knconf_tmp, knc_proto); if (get_udatamodel() != DATAMODEL_LP64) { knconf->knc_rdev = expldev(STRUCT_FGET(knconf_tmp, knc_rdev)); } else { knconf->knc_rdev = STRUCT_FGET(knconf_tmp, knc_rdev); } pf = kmem_alloc(KNC_STRSIZE, KM_SLEEP); p = kmem_alloc(KNC_STRSIZE, KM_SLEEP); error = copyinstr(knconf->knc_protofmly, pf, KNC_STRSIZE, NULL); if (error) { kmem_free(pf, KNC_STRSIZE); kmem_free(p, KNC_STRSIZE); sv_free(svp_head); return (error); } error = copyinstr(knconf->knc_proto, p, KNC_STRSIZE, NULL); if (error) { kmem_free(pf, KNC_STRSIZE); kmem_free(p, KNC_STRSIZE); sv_free(svp_head); return (error); } knconf->knc_protofmly = pf; knconf->knc_proto = p; /* * Get server address */ STRUCT_INIT(addr_tmp, get_udatamodel()); if (copyin(STRUCT_FGETP(args, addr), STRUCT_BUF(addr_tmp), STRUCT_SIZE(addr_tmp))) { addr.buf = NULL; error = EFAULT; } else { char *userbufptr; userbufptr = addr.buf = STRUCT_FGETP(addr_tmp, buf); addr.len = STRUCT_FGET(addr_tmp, len); addr.buf = kmem_alloc(addr.len, KM_SLEEP); addr.maxlen = addr.len; if (copyin(userbufptr, addr.buf, addr.len)) error = EFAULT; } svp->sv_addr = addr; if (error) goto errout; /* * Get the root fhandle */ if (copyin(STRUCT_FGETP(args, fh), &(svp->sv_fhandle.fh_buf), NFS_FHSIZE)) { error = EFAULT; goto errout; } svp->sv_fhandle.fh_len = NFS_FHSIZE; /* * Get server's hostname */ if (flags & NFSMNT_HOSTNAME) { error = copyinstr(STRUCT_FGETP(args, hostname), netname, sizeof (netname), &hlen); if (error) goto errout; } else { char *p = "unknown-host"; hlen = strlen(p) + 1; (void) strcpy(netname, p); } svp->sv_hostnamelen = hlen; svp->sv_hostname = kmem_alloc(svp->sv_hostnamelen, KM_SLEEP); (void) strcpy(svp->sv_hostname, netname); /* * RDMA MOUNT SUPPORT FOR NFS v2: * Establish, is it possible to use RDMA, if so overload the * knconf with rdma specific knconf and free the orignal. */ if ((flags & NFSMNT_TRYRDMA) || (flags & NFSMNT_DORDMA)) { /* * Determine the addr type for RDMA, IPv4 or v6. */ if (strcmp(svp->sv_knconf->knc_protofmly, NC_INET) == 0) addr_type = AF_INET; else if (strcmp(svp->sv_knconf->knc_protofmly, NC_INET6) == 0) addr_type = AF_INET6; if (rdma_reachable(addr_type, &svp->sv_addr, &rdma_knconf) == 0) { /* * If successful, hijack, the orignal knconf and * replace with a new one, depending on the flags. */ svp->sv_origknconf = svp->sv_knconf; svp->sv_knconf = rdma_knconf; knconf = rdma_knconf; } else { if (flags & NFSMNT_TRYRDMA) { #ifdef DEBUG if (rdma_debug) zcmn_err(getzoneid(), CE_WARN, "no RDMA onboard, revert\n"); #endif } if (flags & NFSMNT_DORDMA) { /* * If proto=rdma is specified and no RDMA * path to this server is avialable then * ditch this server. * This is not included in the mountable * server list or the replica list. * Check if more servers are specified; * Failover case, otherwise bail out of mount. */ if (STRUCT_FGET(args, nfs_args_ext) == NFS_ARGS_EXTB && STRUCT_FGETP(args, nfs_ext_u.nfs_extB.next) != NULL) { if (uap->flags & MS_RDONLY && !(flags & NFSMNT_SOFT)) { data = (char *) STRUCT_FGETP(args, nfs_ext_u.nfs_extB.next); if (svp_head->sv_next == NULL) { svp_tail = NULL; svp_2ndlast = NULL; sv_free(svp_head); goto more; } else { svp_tail = svp_2ndlast; svp_2ndlast->sv_next = NULL; sv_free(svp); goto more; } } } else { /* * This is the last server specified * in the nfs_args list passed down * and its not rdma capable. */ if (svp_head->sv_next == NULL) { /* * Is this the only one */ error = EINVAL; #ifdef DEBUG if (rdma_debug) zcmn_err(getzoneid(), CE_WARN, "No RDMA srv"); #endif goto errout; } else { /* * There is list, since some * servers specified before * this passed all requirements */ svp_tail = svp_2ndlast; svp_2ndlast->sv_next = NULL; sv_free(svp); goto proceed; } } } } } /* * Get the extention data which has the new security data structure. */ if (flags & NFSMNT_NEWARGS) { switch (STRUCT_FGET(args, nfs_args_ext)) { case NFS_ARGS_EXTA: case NFS_ARGS_EXTB: /* * Indicating the application is using the new * sec_data structure to pass in the security * data. */ if (STRUCT_FGETP(args, nfs_ext_u.nfs_extA.secdata) == NULL) { error = EINVAL; } else { error = sec_clnt_loadinfo( (struct sec_data *)STRUCT_FGETP(args, nfs_ext_u.nfs_extA.secdata), &secdata, get_udatamodel()); } break; default: error = EINVAL; break; } } else if (flags & NFSMNT_SECURE) { /* * Keep this for backward compatibility to support * NFSMNT_SECURE/NFSMNT_RPCTIMESYNC flags. */ if (STRUCT_FGETP(args, syncaddr) == NULL) { error = EINVAL; } else { /* * get time sync address. */ if (copyin(STRUCT_FGETP(args, syncaddr), &addr_tmp, STRUCT_SIZE(addr_tmp))) { syncaddr.buf = NULL; error = EFAULT; } else { char *userbufptr; userbufptr = syncaddr.buf = STRUCT_FGETP(addr_tmp, buf); syncaddr.len = STRUCT_FGET(addr_tmp, len); syncaddr.buf = kmem_alloc(syncaddr.len, KM_SLEEP); syncaddr.maxlen = syncaddr.len; if (copyin(userbufptr, syncaddr.buf, syncaddr.len)) error = EFAULT; } /* * get server's netname */ if (!error) { error = copyinstr(STRUCT_FGETP(args, netname), netname, sizeof (netname), &nlen); netname[nlen] = '\0'; } if (error && syncaddr.buf != NULL) { kmem_free(syncaddr.buf, syncaddr.len); syncaddr.buf = NULL; } } /* * Move security related data to the sec_data structure. */ if (!error) { dh_k4_clntdata_t *data; char *pf, *p; secdata = kmem_alloc(sizeof (*secdata), KM_SLEEP); if (flags & NFSMNT_RPCTIMESYNC) secdata->flags |= AUTH_F_RPCTIMESYNC; data = kmem_alloc(sizeof (*data), KM_SLEEP); data->syncaddr = syncaddr; /* * duplicate the knconf information for the * new opaque data. */ data->knconf = kmem_alloc(sizeof (*knconf), KM_SLEEP); *data->knconf = *knconf; pf = kmem_alloc(KNC_STRSIZE, KM_SLEEP); p = kmem_alloc(KNC_STRSIZE, KM_SLEEP); bcopy(knconf->knc_protofmly, pf, KNC_STRSIZE); bcopy(knconf->knc_proto, pf, KNC_STRSIZE); data->knconf->knc_protofmly = pf; data->knconf->knc_proto = p; /* move server netname to the sec_data structure */ if (nlen != 0) { data->netname = kmem_alloc(nlen, KM_SLEEP); bcopy(netname, data->netname, nlen); data->netnamelen = (int)nlen; } secdata->secmod = secdata->rpcflavor = AUTH_DES; secdata->data = (caddr_t)data; } } else { secdata = kmem_alloc(sizeof (*secdata), KM_SLEEP); secdata->secmod = secdata->rpcflavor = AUTH_UNIX; secdata->data = NULL; } svp->sv_secdata = secdata; if (error) goto errout; /* * See bug 1180236. * If mount secure failed, we will fall back to AUTH_NONE * and try again. nfs3rootvp() will turn this back off. * * The NFS Version 2 mount uses GETATTR and STATFS procedures. * The server does not care if these procedures have the proper * authentication flavor, so if mount retries using AUTH_NONE * that does not require a credential setup for root then the * automounter would work without requiring root to be * keylogged into AUTH_DES. */ if (secdata->rpcflavor != AUTH_UNIX && secdata->rpcflavor != AUTH_LOOPBACK) secdata->flags |= AUTH_F_TRYNONE; /* * Failover support: * * We may have a linked list of nfs_args structures, * which means the user is looking for failover. If * the mount is either not "read-only" or "soft", * we want to bail out with EINVAL. */ if (STRUCT_FGET(args, nfs_args_ext) == NFS_ARGS_EXTB && STRUCT_FGETP(args, nfs_ext_u.nfs_extB.next) != NULL) { if (uap->flags & MS_RDONLY && !(flags & NFSMNT_SOFT)) { data = (char *)STRUCT_FGETP(args, nfs_ext_u.nfs_extB.next); goto more; } error = EINVAL; goto errout; } /* * Determine the zone we're being mounted into. */ zone_hold(mntzone = zone); /* start with this assumption */ if (getzoneid() == GLOBAL_ZONEID) { zone_rele(mntzone); mntzone = zone_find_by_path(refstr_value(vfsp->vfs_mntpt)); ASSERT(mntzone != NULL); if (mntzone != zone) { error = EBUSY; goto errout; } } if (is_system_labeled()) { error = nfs_mount_label_policy(vfsp, &svp->sv_addr, svp->sv_knconf, cr); if (error > 0) goto errout; if (error == -1) { /* change mount to read-only to prevent write-down */ vfs_setmntopt(vfsp, MNTOPT_RO, NULL, 0); } } /* * Stop the mount from going any further if the zone is going away. */ if (zone_status_get(mntzone) >= ZONE_IS_SHUTTING_DOWN) { error = EBUSY; goto errout; } /* * Get root vnode. */ proceed: error = nfsrootvp(&rtvp, vfsp, svp_head, flags, cr, mntzone); if (error) goto errout; /* * Set option fields in the mount info record */ mi = VTOMI(rtvp); if (svp_head->sv_next) mi->mi_flags |= MI_LLOCK; error = nfs_setopts(rtvp, get_udatamodel(), STRUCT_BUF(args)); if (!error) { /* static pathconf kludge */ error = pathconf_get(mi, get_udatamodel(), STRUCT_BUF(args)); } errout: if (error) { if (rtvp != NULL) { rp = VTOR(rtvp); if (rp->r_flags & RHASHED) rp_rmhash(rp); } sv_free(svp_head); if (mi != NULL) { nfs_async_stop(vfsp); nfs_async_manager_stop(vfsp); if (mi->mi_io_kstats) { kstat_delete(mi->mi_io_kstats); mi->mi_io_kstats = NULL; } if (mi->mi_ro_kstats) { kstat_delete(mi->mi_ro_kstats); mi->mi_ro_kstats = NULL; } nfs_free_mi(mi); } } if (rtvp != NULL) VN_RELE(rtvp); if (mntzone != NULL) zone_rele(mntzone); return (error); } /* * The pathconf information is kept on a linked list of kmem_alloc'ed * structs. We search the list & add a new struct iff there is no other * struct with the same information. * See sys/pathconf.h for ``the rest of the story.'' */ static struct pathcnf *allpc = NULL; static int pathconf_get(struct mntinfo *mi, model_t model, struct nfs_args *args) { struct pathcnf *p; struct pathcnf pc; STRUCT_DECL(pathcnf, pc_tmp); STRUCT_HANDLE(nfs_args, ap); int i; #ifdef lint model = model; #endif STRUCT_INIT(pc_tmp, model); STRUCT_SET_HANDLE(ap, model, args); if (mi->mi_pathconf != NULL) { pathconf_rele(mi); mi->mi_pathconf = NULL; } if ((STRUCT_FGET(ap, flags) & NFSMNT_POSIX) && STRUCT_FGETP(ap, pathconf) != NULL) { if (copyin(STRUCT_FGETP(ap, pathconf), STRUCT_BUF(pc_tmp), STRUCT_SIZE(pc_tmp))) return (EFAULT); if (_PC_ISSET(_PC_ERROR, STRUCT_FGET(pc_tmp, pc_mask))) return (EINVAL); pc.pc_link_max = STRUCT_FGET(pc_tmp, pc_link_max); pc.pc_max_canon = STRUCT_FGET(pc_tmp, pc_max_canon); pc.pc_max_input = STRUCT_FGET(pc_tmp, pc_max_input); pc.pc_name_max = STRUCT_FGET(pc_tmp, pc_name_max); pc.pc_path_max = STRUCT_FGET(pc_tmp, pc_path_max); pc.pc_pipe_buf = STRUCT_FGET(pc_tmp, pc_pipe_buf); pc.pc_vdisable = STRUCT_FGET(pc_tmp, pc_vdisable); pc.pc_xxx = STRUCT_FGET(pc_tmp, pc_xxx); for (i = 0; i < _PC_N; i++) pc.pc_mask[i] = STRUCT_FGET(pc_tmp, pc_mask[i]); for (p = allpc; p != NULL; p = p->pc_next) { if (PCCMP(p, &pc) == 0) break; } if (p != NULL) { mi->mi_pathconf = p; p->pc_refcnt++; } else { p = kmem_alloc(sizeof (*p), KM_SLEEP); *p = pc; p->pc_next = allpc; p->pc_refcnt = 1; allpc = mi->mi_pathconf = p; } } return (0); } /* * release the static pathconf information */ static void pathconf_rele(struct mntinfo *mi) { if (mi->mi_pathconf != NULL) { if (--mi->mi_pathconf->pc_refcnt == 0) { struct pathcnf *p; struct pathcnf *p2; p2 = p = allpc; while (p != NULL && p != mi->mi_pathconf) { p2 = p; p = p->pc_next; } if (p == NULL) { panic("mi->pathconf"); /*NOTREACHED*/ } if (p == allpc) allpc = p->pc_next; else p2->pc_next = p->pc_next; kmem_free(p, sizeof (*p)); mi->mi_pathconf = NULL; } } } static int nfs_dynamic = 1; /* global variable to enable dynamic retrans. */ static ushort_t nfs_max_threads = 8; /* max number of active async threads */ static uint_t nfs_async_clusters = 1; /* # of reqs from each async queue */ static uint_t nfs_cots_timeo = NFS_COTS_TIMEO; static int nfsrootvp(vnode_t **rtvpp, vfs_t *vfsp, struct servinfo *svp, int flags, cred_t *cr, zone_t *zone) { vnode_t *rtvp; mntinfo_t *mi; dev_t nfs_dev; struct vattr va; int error; rnode_t *rp; int i; struct nfs_stats *nfsstatsp; cred_t *lcr = NULL, *tcr = cr; nfsstatsp = zone_getspecific(nfsstat_zone_key, nfs_zone()); ASSERT(nfsstatsp != NULL); /* * Create a mount record and link it to the vfs struct. */ mi = kmem_zalloc(sizeof (*mi), KM_SLEEP); mutex_init(&mi->mi_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&mi->mi_remap_lock, NULL, MUTEX_DEFAULT, NULL); mi->mi_flags = MI_ACL | MI_EXTATTR; if (!(flags & NFSMNT_SOFT)) mi->mi_flags |= MI_HARD; if ((flags & NFSMNT_SEMISOFT)) mi->mi_flags |= MI_SEMISOFT; if ((flags & NFSMNT_NOPRINT)) mi->mi_flags |= MI_NOPRINT; if (flags & NFSMNT_INT) mi->mi_flags |= MI_INT; mi->mi_retrans = NFS_RETRIES; if (svp->sv_knconf->knc_semantics == NC_TPI_COTS_ORD || svp->sv_knconf->knc_semantics == NC_TPI_COTS) mi->mi_timeo = nfs_cots_timeo; else mi->mi_timeo = NFS_TIMEO; mi->mi_prog = NFS_PROGRAM; mi->mi_vers = NFS_VERSION; mi->mi_rfsnames = rfsnames_v2; mi->mi_reqs = nfsstatsp->nfs_stats_v2.rfsreqcnt_ptr; mi->mi_call_type = call_type_v2; mi->mi_ss_call_type = ss_call_type_v2; mi->mi_timer_type = timer_type_v2; mi->mi_aclnames = aclnames_v2; mi->mi_aclreqs = nfsstatsp->nfs_stats_v2.aclreqcnt_ptr; mi->mi_acl_call_type = acl_call_type_v2; mi->mi_acl_ss_call_type = acl_ss_call_type_v2; mi->mi_acl_timer_type = acl_timer_type_v2; cv_init(&mi->mi_failover_cv, NULL, CV_DEFAULT, NULL); mi->mi_servers = svp; mi->mi_curr_serv = svp; mi->mi_acregmin = SEC2HR(ACREGMIN); mi->mi_acregmax = SEC2HR(ACREGMAX); mi->mi_acdirmin = SEC2HR(ACDIRMIN); mi->mi_acdirmax = SEC2HR(ACDIRMAX); if (nfs_dynamic) mi->mi_flags |= MI_DYNAMIC; if (flags & NFSMNT_DIRECTIO) mi->mi_flags |= MI_DIRECTIO; /* * Make a vfs struct for nfs. We do this here instead of below * because rtvp needs a vfs before we can do a getattr on it. * * Assign a unique device id to the mount */ mutex_enter(&nfs_minor_lock); do { nfs_minor = (nfs_minor + 1) & MAXMIN32; nfs_dev = makedevice(nfs_major, nfs_minor); } while (vfs_devismounted(nfs_dev)); mutex_exit(&nfs_minor_lock); vfsp->vfs_dev = nfs_dev; vfs_make_fsid(&vfsp->vfs_fsid, nfs_dev, nfsfstyp); vfsp->vfs_data = (caddr_t)mi; vfsp->vfs_fstype = nfsfstyp; vfsp->vfs_bsize = NFS_MAXDATA; /* * Initialize fields used to support async putpage operations. */ for (i = 0; i < NFS_ASYNC_TYPES; i++) mi->mi_async_clusters[i] = nfs_async_clusters; mi->mi_async_init_clusters = nfs_async_clusters; mi->mi_async_curr = &mi->mi_async_reqs[0]; mi->mi_max_threads = nfs_max_threads; mutex_init(&mi->mi_async_lock, NULL, MUTEX_DEFAULT, NULL); cv_init(&mi->mi_async_reqs_cv, NULL, CV_DEFAULT, NULL); cv_init(&mi->mi_async_work_cv, NULL, CV_DEFAULT, NULL); cv_init(&mi->mi_async_cv, NULL, CV_DEFAULT, NULL); mi->mi_vfsp = vfsp; zone_hold(mi->mi_zone = zone); nfs_mi_zonelist_add(mi); /* * Make the root vnode, use it to get attributes, * then remake it with the attributes. */ rtvp = makenfsnode((fhandle_t *)svp->sv_fhandle.fh_buf, NULL, vfsp, gethrtime(), cr, NULL, NULL); va.va_mask = AT_ALL; /* * If the uid is set then set the creds for secure mounts * by proxy processes such as automountd. */ if (svp->sv_secdata->uid != 0 && svp->sv_secdata->rpcflavor == RPCSEC_GSS) { lcr = crdup(cr); (void) crsetugid(lcr, svp->sv_secdata->uid, crgetgid(cr)); tcr = lcr; } error = nfsgetattr(rtvp, &va, tcr); if (error) goto bad; rtvp->v_type = va.va_type; /* * Poll every server to get the filesystem stats; we're * only interested in the server's transfer size, and we * want the minimum. * * While we're looping, we'll turn off AUTH_F_TRYNONE, * which is only for the mount operation. */ mi->mi_tsize = MIN(NFS_MAXDATA, nfstsize()); mi->mi_stsize = MIN(NFS_MAXDATA, nfstsize()); for (svp = mi->mi_servers; svp != NULL; svp = svp->sv_next) { struct nfsstatfs fs; int douprintf; douprintf = 1; mi->mi_curr_serv = svp; error = rfs2call(mi, RFS_STATFS, xdr_fhandle, (caddr_t)svp->sv_fhandle.fh_buf, xdr_statfs, (caddr_t)&fs, tcr, &douprintf, &fs.fs_status, 0, NULL); if (error) goto bad; mi->mi_stsize = MIN(mi->mi_stsize, fs.fs_tsize); svp->sv_secdata->flags &= ~AUTH_F_TRYNONE; } mi->mi_curr_serv = mi->mi_servers; mi->mi_curread = mi->mi_tsize; mi->mi_curwrite = mi->mi_stsize; /* * Start the manager thread responsible for handling async worker * threads. */ VFS_HOLD(vfsp); /* add reference for thread */ mi->mi_manager_thread = zthread_create(NULL, 0, nfs_async_manager, vfsp, 0, minclsyspri); ASSERT(mi->mi_manager_thread != NULL); /* * Initialize kstats */ nfs_mnt_kstat_init(vfsp); mi->mi_type = rtvp->v_type; *rtvpp = rtvp; if (lcr != NULL) crfree(lcr); return (0); bad: /* * An error occurred somewhere, need to clean up... * We need to release our reference to the root vnode and * destroy the mntinfo struct that we just created. */ if (lcr != NULL) crfree(lcr); rp = VTOR(rtvp); if (rp->r_flags & RHASHED) rp_rmhash(rp); VN_RELE(rtvp); nfs_async_stop(vfsp); nfs_async_manager_stop(vfsp); if (mi->mi_io_kstats) { kstat_delete(mi->mi_io_kstats); mi->mi_io_kstats = NULL; } if (mi->mi_ro_kstats) { kstat_delete(mi->mi_ro_kstats); mi->mi_ro_kstats = NULL; } nfs_free_mi(mi); *rtvpp = NULL; return (error); } /* * vfs operations */ static int nfs_unmount(vfs_t *vfsp, int flag, cred_t *cr) { mntinfo_t *mi; ushort_t omax; if (secpolicy_fs_unmount(cr, vfsp) != 0) return (EPERM); mi = VFTOMI(vfsp); if (flag & MS_FORCE) { vfsp->vfs_flag |= VFS_UNMOUNTED; /* * We need to stop the manager thread explicitly; the worker * threads can time out and exit on their own. */ nfs_async_manager_stop(vfsp); destroy_rtable(vfsp, cr); if (mi->mi_io_kstats) { kstat_delete(mi->mi_io_kstats); mi->mi_io_kstats = NULL; } if (mi->mi_ro_kstats) { kstat_delete(mi->mi_ro_kstats); mi->mi_ro_kstats = NULL; } return (0); } /* * Wait until all asynchronous putpage operations on * this file system are complete before flushing rnodes * from the cache. */ omax = mi->mi_max_threads; if (nfs_async_stop_sig(vfsp)) { return (EINTR); } rflush(vfsp, cr); /* * If there are any active vnodes on this file system, * then the file system is busy and can't be umounted. */ if (check_rtable(vfsp)) { mutex_enter(&mi->mi_async_lock); mi->mi_max_threads = omax; mutex_exit(&mi->mi_async_lock); return (EBUSY); } /* * The unmount can't fail from now on; stop the manager thread. */ nfs_async_manager_stop(vfsp); /* * Destroy all rnodes belonging to this file system from the * rnode hash queues and purge any resources allocated to * them. */ destroy_rtable(vfsp, cr); if (mi->mi_io_kstats) { kstat_delete(mi->mi_io_kstats); mi->mi_io_kstats = NULL; } if (mi->mi_ro_kstats) { kstat_delete(mi->mi_ro_kstats); mi->mi_ro_kstats = NULL; } return (0); } /* * find root of nfs */ static int nfs_root(vfs_t *vfsp, vnode_t **vpp) { mntinfo_t *mi; vnode_t *vp; servinfo_t *svp; mi = VFTOMI(vfsp); if (nfs_zone() != mi->mi_zone) return (EPERM); svp = mi->mi_curr_serv; if (svp && (svp->sv_flags & SV_ROOT_STALE)) { mutex_enter(&svp->sv_lock); svp->sv_flags &= ~SV_ROOT_STALE; mutex_exit(&svp->sv_lock); return (ENOENT); } vp = makenfsnode((fhandle_t *)mi->mi_curr_serv->sv_fhandle.fh_buf, NULL, vfsp, gethrtime(), CRED(), NULL, NULL); if (VTOR(vp)->r_flags & RSTALE) { VN_RELE(vp); return (ENOENT); } ASSERT(vp->v_type == VNON || vp->v_type == mi->mi_type); vp->v_type = mi->mi_type; *vpp = vp; return (0); } /* * Get file system statistics. */ static int nfs_statvfs(vfs_t *vfsp, struct statvfs64 *sbp) { int error; mntinfo_t *mi; struct nfsstatfs fs; int douprintf; failinfo_t fi; vnode_t *vp; error = nfs_root(vfsp, &vp); if (error) return (error); mi = VFTOMI(vfsp); douprintf = 1; fi.vp = vp; fi.fhp = NULL; /* no need to update, filehandle not copied */ fi.copyproc = nfscopyfh; fi.lookupproc = nfslookup; fi.xattrdirproc = acl_getxattrdir2; error = rfs2call(mi, RFS_STATFS, xdr_fhandle, (caddr_t)VTOFH(vp), xdr_statfs, (caddr_t)&fs, CRED(), &douprintf, &fs.fs_status, 0, &fi); if (!error) { error = geterrno(fs.fs_status); if (!error) { mutex_enter(&mi->mi_lock); if (mi->mi_stsize) { mi->mi_stsize = MIN(mi->mi_stsize, fs.fs_tsize); } else { mi->mi_stsize = fs.fs_tsize; mi->mi_curwrite = mi->mi_stsize; } mutex_exit(&mi->mi_lock); sbp->f_bsize = fs.fs_bsize; sbp->f_frsize = fs.fs_bsize; sbp->f_blocks = (fsblkcnt64_t)fs.fs_blocks; sbp->f_bfree = (fsblkcnt64_t)fs.fs_bfree; /* * Some servers may return negative available * block counts. They may do this because they * calculate the number of available blocks by * subtracting the number of used blocks from * the total number of blocks modified by the * minimum free value. For example, if the * minumum free percentage is 10 and the file * system is greater than 90 percent full, then * 90 percent of the total blocks minus the * actual number of used blocks may be a * negative number. * * In this case, we need to sign extend the * negative number through the assignment from * the 32 bit bavail count to the 64 bit bavail * count. * * We need to be able to discern between there * just being a lot of available blocks on the * file system and the case described above. * We are making the assumption that it does * not make sense to have more available blocks * than there are free blocks. So, if there * are, then we treat the number as if it were * a negative number and arrange to have it * sign extended when it is converted from 32 * bits to 64 bits. */ if (fs.fs_bavail <= fs.fs_bfree) sbp->f_bavail = (fsblkcnt64_t)fs.fs_bavail; else { sbp->f_bavail = (fsblkcnt64_t)((long)fs.fs_bavail); } sbp->f_files = (fsfilcnt64_t)-1; sbp->f_ffree = (fsfilcnt64_t)-1; sbp->f_favail = (fsfilcnt64_t)-1; sbp->f_fsid = (unsigned long)vfsp->vfs_fsid.val[0]; (void) strncpy(sbp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name, FSTYPSZ); sbp->f_flag = vf_to_stf(vfsp->vfs_flag); sbp->f_namemax = (uint32_t)-1; } else { PURGE_STALE_FH(error, vp, CRED()); } } VN_RELE(vp); return (error); } static kmutex_t nfs_syncbusy; /* * Flush dirty nfs files for file system vfsp. * If vfsp == NULL, all nfs files are flushed. */ /* ARGSUSED */ static int nfs_sync(vfs_t *vfsp, short flag, cred_t *cr) { /* * Cross-zone calls are OK here, since this translates to a * VOP_PUTPAGE(B_ASYNC), which gets picked up by the right zone. */ if (!(flag & SYNC_ATTR) && mutex_tryenter(&nfs_syncbusy) != 0) { rflush(vfsp, cr); mutex_exit(&nfs_syncbusy); } return (0); } /* ARGSUSED */ static int nfs_vget(vfs_t *vfsp, vnode_t **vpp, fid_t *fidp) { int error; vnode_t *vp; struct vattr va; struct nfs_fid *nfsfidp = (struct nfs_fid *)fidp; zoneid_t zoneid = VFTOMI(vfsp)->mi_zone->zone_id; if (nfs_zone() != VFTOMI(vfsp)->mi_zone) return (EPERM); if (fidp->fid_len != (sizeof (*nfsfidp) - sizeof (short))) { #ifdef DEBUG zcmn_err(zoneid, CE_WARN, "nfs_vget: bad fid len, %d/%d", fidp->fid_len, (int)(sizeof (*nfsfidp) - sizeof (short))); #endif *vpp = NULL; return (ESTALE); } vp = makenfsnode((fhandle_t *)(nfsfidp->nf_data), NULL, vfsp, gethrtime(), CRED(), NULL, NULL); if (VTOR(vp)->r_flags & RSTALE) { VN_RELE(vp); *vpp = NULL; return (ENOENT); } if (vp->v_type == VNON) { va.va_mask = AT_ALL; error = nfsgetattr(vp, &va, CRED()); if (error) { VN_RELE(vp); *vpp = NULL; return (error); } vp->v_type = va.va_type; } *vpp = vp; return (0); } /* ARGSUSED */ static int nfs_mountroot(vfs_t *vfsp, whymountroot_t why) { vnode_t *rtvp; char root_hostname[SYS_NMLN+1]; struct servinfo *svp; int error; int vfsflags; size_t size; char *root_path; struct pathname pn; char *name; cred_t *cr; struct nfs_args args; /* nfs mount arguments */ static char token[10]; bzero(&args, sizeof (args)); /* do this BEFORE getfile which causes xid stamps to be initialized */ clkset(-1L); /* hack for now - until we get time svc? */ if (why == ROOT_REMOUNT) { /* * Shouldn't happen. */ panic("nfs_mountroot: why == ROOT_REMOUNT"); } if (why == ROOT_UNMOUNT) { /* * Nothing to do for NFS. */ return (0); } /* * why == ROOT_INIT */ name = token; *name = 0; getfsname("root", name, sizeof (token)); pn_alloc(&pn); root_path = pn.pn_path; svp = kmem_zalloc(sizeof (*svp), KM_SLEEP); svp->sv_knconf = kmem_zalloc(sizeof (*svp->sv_knconf), KM_SLEEP); svp->sv_knconf->knc_protofmly = kmem_alloc(KNC_STRSIZE, KM_SLEEP); svp->sv_knconf->knc_proto = kmem_alloc(KNC_STRSIZE, KM_SLEEP); /* * Get server address * Get the root fhandle * Get server's transport * Get server's hostname * Get options */ args.addr = &svp->sv_addr; args.fh = (char *)&svp->sv_fhandle.fh_buf; args.knconf = svp->sv_knconf; args.hostname = root_hostname; vfsflags = 0; if (error = mount_root(*name ? name : "root", root_path, NFS_VERSION, &args, &vfsflags)) { nfs_cmn_err(error, CE_WARN, "nfs_mountroot: mount_root failed: %m"); sv_free(svp); pn_free(&pn); return (error); } svp->sv_fhandle.fh_len = NFS_FHSIZE; svp->sv_hostnamelen = (int)(strlen(root_hostname) + 1); svp->sv_hostname = kmem_alloc(svp->sv_hostnamelen, KM_SLEEP); (void) strcpy(svp->sv_hostname, root_hostname); /* * Force root partition to always be mounted with AUTH_UNIX for now */ svp->sv_secdata = kmem_alloc(sizeof (*svp->sv_secdata), KM_SLEEP); svp->sv_secdata->secmod = AUTH_UNIX; svp->sv_secdata->rpcflavor = AUTH_UNIX; svp->sv_secdata->data = NULL; cr = crgetcred(); rtvp = NULL; error = nfsrootvp(&rtvp, vfsp, svp, args.flags, cr, global_zone); crfree(cr); if (error) { pn_free(&pn); goto errout; } error = nfs_setopts(rtvp, DATAMODEL_NATIVE, &args); if (error) { nfs_cmn_err(error, CE_WARN, "nfs_mountroot: invalid root mount options"); pn_free(&pn); goto errout; } (void) vfs_lock_wait(vfsp); vfs_add(NULL, vfsp, vfsflags); vfs_unlock(vfsp); size = strlen(svp->sv_hostname); (void) strcpy(rootfs.bo_name, svp->sv_hostname); rootfs.bo_name[size] = ':'; (void) strcpy(&rootfs.bo_name[size + 1], root_path); pn_free(&pn); errout: if (error) { sv_free(svp); nfs_async_stop(vfsp); nfs_async_manager_stop(vfsp); } if (rtvp != NULL) VN_RELE(rtvp); return (error); } /* * Initialization routine for VFS routines. Should only be called once */ int nfs_vfsinit(void) { mutex_init(&nfs_syncbusy, NULL, MUTEX_DEFAULT, NULL); return (0); } void nfs_vfsfini(void) { mutex_destroy(&nfs_syncbusy); } void nfs_freevfs(vfs_t *vfsp) { mntinfo_t *mi; servinfo_t *svp; /* free up the resources */ mi = VFTOMI(vfsp); pathconf_rele(mi); svp = mi->mi_servers; mi->mi_servers = mi->mi_curr_serv = NULL; sv_free(svp); /* * By this time we should have already deleted the * mi kstats in the unmount code. If they are still around * somethings wrong */ ASSERT(mi->mi_io_kstats == NULL); nfs_free_mi(mi); }