diff options
Diffstat (limited to 'sys/nfsserver/nfs_serv.c')
| -rw-r--r-- | sys/nfsserver/nfs_serv.c | 3767 |
1 files changed, 0 insertions, 3767 deletions
diff --git a/sys/nfsserver/nfs_serv.c b/sys/nfsserver/nfs_serv.c deleted file mode 100644 index 32fd3f5..0000000 --- a/sys/nfsserver/nfs_serv.c +++ /dev/null @@ -1,3767 +0,0 @@ -/*- - * Copyright (c) 1989, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Rick Macklem at The University of Guelph. - * - * 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. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95 - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -/* - * nfs version 2 and 3 server calls to vnode ops - * - these routines generally have 3 phases - * 1 - break down and validate rpc request in mbuf list - * 2 - do the vnode ops for the request - * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) - * 3 - build the rpc reply in an mbuf list - * nb: - * - do not mix the phases, since the nfsm_?? macros can return failures - * on a bad rpc or similar and do not do any vrele() or vput()'s - * - * - the nfsm_reply() macro generates an nfs rpc reply with the nfs - * error number iff error != 0 whereas - * returning an error from the server function implies a fatal error - * such as a badly constructed rpc request that should be dropped without - * a reply. - * For nfsm_reply(), the case where error == EBADRPC is treated - * specially; after constructing a reply, it does an immediate - * `goto nfsmout' to avoid getting any V3 post-op status appended. - * - * Other notes: - * Warning: always pay careful attention to resource cleanup on return - * and note that nfsm_*() macros can terminate a procedure on certain - * errors. - * - * lookup() and namei() - * may return garbage in various structural fields/return elements - * if an error is returned, and may garbage up nd.ni_dvp even if no - * error is returned and you did not request LOCKPARENT or WANTPARENT. - * - * We use the ni_cnd.cn_flags 'HASBUF' flag to track whether the name - * buffer has been freed or not. - */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/proc.h> -#include <sys/namei.h> -#include <sys/unistd.h> -#include <sys/vnode.h> -#include <sys/mount.h> -#include <sys/socket.h> -#include <sys/socketvar.h> -#include <sys/malloc.h> -#include <sys/mbuf.h> -#include <sys/priv.h> -#include <sys/dirent.h> -#include <sys/stat.h> -#include <sys/kernel.h> -#include <sys/sysctl.h> -#include <sys/bio.h> -#include <sys/buf.h> -#include <sys/rwlock.h> - -#include <vm/vm.h> -#include <vm/vm_extern.h> -#include <vm/vm_object.h> - -#include <nfs/nfsproto.h> -#include <nfsserver/nfs.h> -#include <nfs/xdr_subs.h> -#include <nfsserver/nfsm_subs.h> - -FEATURE(nfsserver, "NFS server"); - -#ifdef NFSRV_DEBUG -#define nfsdbprintf(info) printf info -#else -#define nfsdbprintf(info) -#endif - -#define MAX_COMMIT_COUNT (1024 * 1024) - -#define MAX_REORDERED_RPC 16 -#define NUM_HEURISTIC 1031 -#define NHUSE_INIT 64 -#define NHUSE_INC 16 -#define NHUSE_MAX 2048 - -static struct nfsheur { - struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ - off_t nh_nextoff; /* next offset for sequential detection */ - int nh_use; /* use count for selection */ - int nh_seqcount; /* heuristic */ -} nfsheur[NUM_HEURISTIC]; - -/* Global vars */ - -int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; -int nfsrvw_procrastinate_v3 = 0; - -static struct timeval nfsver = { 0 }; - -SYSCTL_NODE(_vfs, OID_AUTO, nfsrv, CTLFLAG_RW, 0, "NFS server"); - -static int nfs_async; -static int nfs_commit_blks; -static int nfs_commit_miss; -SYSCTL_INT(_vfs_nfsrv, OID_AUTO, async, CTLFLAG_RW, &nfs_async, 0, - "Tell client that writes were synced even though they were not"); -SYSCTL_INT(_vfs_nfsrv, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 0, - "Number of completed commits"); -SYSCTL_INT(_vfs_nfsrv, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 0, ""); - -struct nfsrvstats nfsrvstats; -SYSCTL_STRUCT(_vfs_nfsrv, NFS_NFSRVSTATS, nfsrvstats, CTLFLAG_RW, - &nfsrvstats, nfsrvstats, "S,nfsrvstats"); - -static int nfsrv_access(struct vnode *, accmode_t, struct ucred *, - int, int); - -/* - * Clear nameidata fields that are tested in nsfmout cleanup code prior - * to using first nfsm macro (that might jump to the cleanup code). - */ - -static __inline void -ndclear(struct nameidata *nd) -{ - - nd->ni_cnd.cn_flags = 0; - nd->ni_vp = NULL; - nd->ni_dvp = NULL; - nd->ni_startdir = NULL; - nd->ni_strictrelative = 0; -} - -/* - * Heuristic to detect sequential operation. - */ -static struct nfsheur * -nfsrv_sequential_heuristic(struct uio *uio, struct vnode *vp) -{ - struct nfsheur *nh; - int hi, try; - - /* Locate best candidate. */ - try = 32; - hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; - nh = &nfsheur[hi]; - while (try--) { - if (nfsheur[hi].nh_vp == vp) { - nh = &nfsheur[hi]; - break; - } - if (nfsheur[hi].nh_use > 0) - --nfsheur[hi].nh_use; - hi = (hi + 1) % NUM_HEURISTIC; - if (nfsheur[hi].nh_use < nh->nh_use) - nh = &nfsheur[hi]; - } - - /* Initialize hint if this is a new file. */ - if (nh->nh_vp != vp) { - nh->nh_vp = vp; - nh->nh_nextoff = uio->uio_offset; - nh->nh_use = NHUSE_INIT; - if (uio->uio_offset == 0) - nh->nh_seqcount = 4; - else - nh->nh_seqcount = 1; - } - - /* Calculate heuristic. */ - if ((uio->uio_offset == 0 && nh->nh_seqcount > 0) || - uio->uio_offset == nh->nh_nextoff) { - /* See comments in vfs_vnops.c:sequential_heuristic(). */ - nh->nh_seqcount += howmany(uio->uio_resid, 16384); - if (nh->nh_seqcount > IO_SEQMAX) - nh->nh_seqcount = IO_SEQMAX; - } else if (qabs(uio->uio_offset - nh->nh_nextoff) <= MAX_REORDERED_RPC * - imax(vp->v_mount->mnt_stat.f_iosize, uio->uio_resid)) { - /* Probably a reordered RPC, leave seqcount alone. */ - } else if (nh->nh_seqcount > 1) { - nh->nh_seqcount /= 2; - } else { - nh->nh_seqcount = 0; - } - nh->nh_use += NHUSE_INC; - if (nh->nh_use > NHUSE_MAX) - nh->nh_use = NHUSE_MAX; - return (nh); -} - -/* - * nfs v3 access service - */ -int -nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct vnode *vp = NULL; - nfsfh_t nfh; - fhandle_t *fhp; - u_int32_t *tl; - caddr_t bpos; - int error = 0, rdonly, getret; - struct mbuf *mb, *mreq; - struct vattr vattr, *vap = &vattr; - u_long testmode, nfsmode; - int v3 = (nfsd->nd_flag & ND_NFSV3); - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - if (!v3) - panic("nfsrv3_access: v3 proc called on a v2 connection"); - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - tl = nfsm_dissect_nonblock(u_int32_t *, NFSX_UNSIGNED); - error = nfsrv_fhtovp(fhp, 0, &vp, nfsd, slp, nam, &rdonly); - if (error) { - nfsm_reply(NFSX_UNSIGNED); - nfsm_srvpostop_attr(1, NULL); - error = 0; - goto nfsmout; - } - nfsmode = fxdr_unsigned(u_int32_t, *tl); - if ((nfsmode & NFSV3ACCESS_READ) && - nfsrv_access(vp, VREAD, cred, rdonly, 0)) - nfsmode &= ~NFSV3ACCESS_READ; - if (vp->v_type == VDIR) - testmode = (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | - NFSV3ACCESS_DELETE); - else - testmode = (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); - if ((nfsmode & testmode) && - nfsrv_access(vp, VWRITE, cred, rdonly, 0)) - nfsmode &= ~testmode; - if (vp->v_type == VDIR) - testmode = NFSV3ACCESS_LOOKUP; - else - testmode = NFSV3ACCESS_EXECUTE; - if ((nfsmode & testmode) && - nfsrv_access(vp, VEXEC, cred, rdonly, 0)) - nfsmode &= ~testmode; - getret = VOP_GETATTR(vp, vap, cred); - vput(vp); - vp = NULL; - nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED); - nfsm_srvpostop_attr(getret, vap); - tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED); - *tl = txdr_unsigned(nfsmode); -nfsmout: - if (vp) - vput(vp); - return(error); -} - -/* - * nfs getattr service - */ -int -nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct nfs_fattr *fp; - struct vattr va; - struct vattr *vap = &va; - struct vnode *vp = NULL; - nfsfh_t nfh; - fhandle_t *fhp; - caddr_t bpos; - int error = 0, rdonly; - struct mbuf *mb, *mreq; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - error = nfsrv_fhtovp(fhp, 0, &vp, nfsd, slp, nam, &rdonly); - if (error) { - nfsm_reply(0); - error = 0; - goto nfsmout; - } - error = VOP_GETATTR(vp, vap, cred); - vput(vp); - vp = NULL; - nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); - if (error) { - error = 0; - goto nfsmout; - } - fp = nfsm_build(struct nfs_fattr *, - NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); - nfsm_srvfillattr(vap, fp); - /* fall through */ - -nfsmout: - if (vp) - vput(vp); - return(error); -} - -/* - * nfs setattr service - */ -int -nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct vattr va, preat; - struct vattr *vap = &va; - struct nfsv2_sattr *sp; - struct nfs_fattr *fp; - struct vnode *vp = NULL; - nfsfh_t nfh; - fhandle_t *fhp; - u_int32_t *tl; - caddr_t bpos; - int error = 0, rdonly, preat_ret = 1, postat_ret = 1; - int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0; - struct mbuf *mb, *mreq; - struct timespec guard = { 0, 0 }; - struct mount *mp = NULL; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) { - error = ESTALE; - goto out; - } - (void) vn_start_write(NULL, &mp, V_WAIT); - vfs_rel(mp); /* The write holds a ref. */ - VATTR_NULL(vap); - if (v3) { - nfsm_srvsattr(vap); - tl = nfsm_dissect_nonblock(u_int32_t *, NFSX_UNSIGNED); - gcheck = fxdr_unsigned(int, *tl); - if (gcheck) { - tl = nfsm_dissect_nonblock(u_int32_t *, 2 * NFSX_UNSIGNED); - fxdr_nfsv3time(tl, &guard); - } - } else { - sp = nfsm_dissect_nonblock(struct nfsv2_sattr *, NFSX_V2SATTR); - /* - * Nah nah nah nah na nah - * There is a bug in the Sun client that puts 0xffff in the mode - * field of sattr when it should put in 0xffffffff. The u_short - * doesn't sign extend. - * --> check the low order 2 bytes for 0xffff - */ - if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) - vap->va_mode = nfstov_mode(sp->sa_mode); - if (sp->sa_uid != nfsrv_nfs_xdrneg1) - vap->va_uid = fxdr_unsigned(uid_t, sp->sa_uid); - if (sp->sa_gid != nfsrv_nfs_xdrneg1) - vap->va_gid = fxdr_unsigned(gid_t, sp->sa_gid); - if (sp->sa_size != nfsrv_nfs_xdrneg1) - vap->va_size = fxdr_unsigned(u_quad_t, sp->sa_size); - if (sp->sa_atime.nfsv2_sec != nfsrv_nfs_xdrneg1) { -#ifdef notyet - fxdr_nfsv2time(&sp->sa_atime, &vap->va_atime); -#else - vap->va_atime.tv_sec = - fxdr_unsigned(int32_t, sp->sa_atime.nfsv2_sec); - vap->va_atime.tv_nsec = 0; -#endif - } - if (sp->sa_mtime.nfsv2_sec != nfsrv_nfs_xdrneg1) - fxdr_nfsv2time(&sp->sa_mtime, &vap->va_mtime); - - } - - /* - * Now that we have all the fields, lets do it. - */ - error = nfsrv_fhtovp(fhp, 0, &vp, nfsd, slp, nam, &rdonly); - if (error) { - nfsm_reply(2 * NFSX_UNSIGNED); - if (v3) - nfsm_srvwcc_data(preat_ret, &preat, postat_ret, vap); - error = 0; - goto nfsmout; - } - - /* - * vp now an active resource, pay careful attention to cleanup - */ - if (v3) { - error = preat_ret = VOP_GETATTR(vp, &preat, cred); - if (!error && gcheck && - (preat.va_ctime.tv_sec != guard.tv_sec || - preat.va_ctime.tv_nsec != guard.tv_nsec)) - error = NFSERR_NOT_SYNC; - if (error) { - vput(vp); - vp = NULL; - nfsm_reply(NFSX_WCCDATA(v3)); - if (v3) - nfsm_srvwcc_data(preat_ret, &preat, postat_ret, vap); - error = 0; - goto nfsmout; - } - } - - /* - * If the size is being changed write acces is required, otherwise - * just check for a read only filesystem. - */ - if (vap->va_size == ((u_quad_t)((quad_t) -1))) { - if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { - error = EROFS; - goto out; - } - } else { - if (vp->v_type == VDIR) { - error = EISDIR; - goto out; - } else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly, - 0)) != 0) - goto out; - } - error = VOP_SETATTR(vp, vap, cred); - postat_ret = VOP_GETATTR(vp, vap, cred); - if (!error) - error = postat_ret; -out: - if (vp != NULL) - vput(vp); - - vp = NULL; - nfsm_reply(NFSX_WCCORFATTR(v3)); - if (v3) { - nfsm_srvwcc_data(preat_ret, &preat, postat_ret, vap); - } else if (!error) { - /* v2 non-error case. */ - fp = nfsm_build(struct nfs_fattr *, NFSX_V2FATTR); - nfsm_srvfillattr(vap, fp); - } - error = 0; - /* fall through */ - -nfsmout: - if (vp) - vput(vp); - vn_finished_write(mp); - return(error); -} - -/* - * nfs lookup rpc - */ -int -nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct nfs_fattr *fp; - struct nameidata nd, ind, *ndp = &nd; - struct vnode *vp, *dirp = NULL; - nfsfh_t nfh; - fhandle_t *fhp; - caddr_t bpos; - int error = 0, len, dirattr_ret = 1; - int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag; - struct mbuf *mb, *mreq; - struct vattr va, dirattr, *vap = &va; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - ndclear(&nd); - - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - nfsm_srvnamesiz(len); - - pubflag = nfs_ispublicfh(fhp); - - nd.ni_cnd.cn_cred = cred; - nd.ni_cnd.cn_nameiop = LOOKUP; - nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; - error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos, - &dirp, v3, &dirattr, &dirattr_ret, pubflag); - - /* - * namei failure, only dirp to cleanup. Clear out garbarge from - * structure in case macros jump to nfsmout. - */ - - if (error) { - if (dirp) { - vrele(dirp); - dirp = NULL; - } - nfsm_reply(NFSX_POSTOPATTR(v3)); - if (v3) - nfsm_srvpostop_attr(dirattr_ret, &dirattr); - error = 0; - goto nfsmout; - } - - /* - * Locate index file for public filehandle - * - * error is 0 on entry and 0 on exit from this block. - */ - - if (pubflag) { - if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) { - /* - * Setup call to lookup() to see if we can find - * the index file. Arguably, this doesn't belong - * in a kernel.. Ugh. If an error occurs, do not - * try to install an index file and then clear the - * error. - * - * When we replace nd with ind and redirect ndp, - * maintenance of ni_startdir and ni_vp shift to - * ind and we have to clean them up in the old nd. - * However, the cnd resource continues to be maintained - * via the original nd. Confused? You aren't alone! - */ - ind = nd; - VOP_UNLOCK(nd.ni_vp, 0); - ind.ni_pathlen = strlen(nfs_pub.np_index); - ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf = - nfs_pub.np_index; - ind.ni_startdir = nd.ni_vp; - VREF(ind.ni_startdir); - error = lookup(&ind); - ind.ni_dvp = NULL; - - if (error == 0) { - /* - * Found an index file. Get rid of - * the old references. transfer nd.ni_vp' - */ - if (dirp) - vrele(dirp); - dirp = nd.ni_vp; - nd.ni_vp = NULL; - vrele(nd.ni_startdir); - nd.ni_startdir = NULL; - ndp = &ind; - } - error = 0; - } - /* - * If the public filehandle was used, check that this lookup - * didn't result in a filehandle outside the publicly exported - * filesystem. We clear the poor vp here to avoid lockups due - * to NFS I/O. - */ - - if (ndp->ni_vp->v_mount != nfs_pub.np_mount) { - vput(nd.ni_vp); - nd.ni_vp = NULL; - error = EPERM; - } - } - - /* - * Resources at this point: - * ndp->ni_vp may not be NULL - */ - - if (error) { - nfsm_reply(NFSX_POSTOPATTR(v3)); - if (v3) - nfsm_srvpostop_attr(dirattr_ret, &dirattr); - error = 0; - goto nfsmout; - } - - /* - * Get underlying attribute, then release remaining resources ( for - * the same potential blocking reason ) and reply. - */ - vp = ndp->ni_vp; - bzero((caddr_t)fhp, sizeof(nfh)); - fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; - error = VOP_VPTOFH(vp, &fhp->fh_fid); - if (!error) - error = VOP_GETATTR(vp, vap, cred); - - vput(vp); - vrele(ndp->ni_startdir); - vrele(dirp); - ndp->ni_vp = NULL; - ndp->ni_startdir = NULL; - dirp = NULL; - nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3)); - if (error) { - if (v3) - nfsm_srvpostop_attr(dirattr_ret, &dirattr); - error = 0; - goto nfsmout; - } - nfsm_srvfhtom(fhp, v3); - if (v3) { - nfsm_srvpostop_attr(0, vap); - nfsm_srvpostop_attr(dirattr_ret, &dirattr); - } else { - fp = nfsm_build(struct nfs_fattr *, NFSX_V2FATTR); - nfsm_srvfillattr(vap, fp); - } - -nfsmout: - if (ndp->ni_vp || dirp || ndp->ni_startdir) { - if (ndp->ni_vp) - vput(ndp->ni_vp); - if (dirp) - vrele(dirp); - if (ndp->ni_startdir) - vrele(ndp->ni_startdir); - } - NDFREE(&nd, NDF_ONLY_PNBUF); - return (error); -} - -/* - * nfs readlink service - */ -int -nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; - struct iovec *ivp = iv; - struct mbuf *mp; - u_int32_t *tl; - caddr_t bpos; - int error = 0, rdonly, i, tlen, len, getret; - int v3 = (nfsd->nd_flag & ND_NFSV3); - struct mbuf *mb, *mp3, *nmp, *mreq; - struct vnode *vp = NULL; - struct vattr attr; - nfsfh_t nfh; - fhandle_t *fhp; - struct uio io, *uiop = &io; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); -#ifndef nolint - mp = NULL; -#endif - mp3 = NULL; - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - len = 0; - i = 0; - while (len < NFS_MAXPATHLEN) { - MGET(nmp, M_WAITOK, MT_DATA); - MCLGET(nmp, M_WAITOK); - nmp->m_len = NFSMSIZ(nmp); - if (len == 0) - mp3 = mp = nmp; - else { - mp->m_next = nmp; - mp = nmp; - } - if ((len + mp->m_len) > NFS_MAXPATHLEN) { - mp->m_len = NFS_MAXPATHLEN - len; - len = NFS_MAXPATHLEN; - } else - len += mp->m_len; - ivp->iov_base = mtod(mp, caddr_t); - ivp->iov_len = mp->m_len; - i++; - ivp++; - } - uiop->uio_iov = iv; - uiop->uio_iovcnt = i; - uiop->uio_offset = 0; - uiop->uio_resid = len; - uiop->uio_rw = UIO_READ; - uiop->uio_segflg = UIO_SYSSPACE; - uiop->uio_td = NULL; - error = nfsrv_fhtovp(fhp, 0, &vp, nfsd, slp, nam, &rdonly); - if (error) { - nfsm_reply(2 * NFSX_UNSIGNED); - if (v3) - nfsm_srvpostop_attr(1, NULL); - error = 0; - goto nfsmout; - } - if (vp->v_type != VLNK) { - if (v3) - error = EINVAL; - else - error = ENXIO; - } else - error = VOP_READLINK(vp, uiop, cred); - getret = VOP_GETATTR(vp, &attr, cred); - vput(vp); - vp = NULL; - nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED); - if (v3) - nfsm_srvpostop_attr(getret, &attr); - if (error) { - error = 0; - goto nfsmout; - } - if (uiop->uio_resid > 0) { - len -= uiop->uio_resid; - tlen = nfsm_rndup(len); - nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); - } - tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED); - *tl = txdr_unsigned(len); - mb->m_next = mp3; - mp3 = NULL; -nfsmout: - if (mp3) - m_freem(mp3); - if (vp) - vput(vp); - return(error); -} - -/* - * nfs read service - */ -int -nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct iovec *iv; - struct iovec *iv2; - struct mbuf *m; - struct nfs_fattr *fp; - u_int32_t *tl; - int i; - caddr_t bpos; - int error = 0, rdonly, cnt, len, left, siz, tlen, getret; - int v3 = (nfsd->nd_flag & ND_NFSV3), reqlen; - struct mbuf *mb, *mreq; - struct mbuf *m2; - struct vnode *vp = NULL; - nfsfh_t nfh; - fhandle_t *fhp; - struct uio io, *uiop = &io; - struct vattr va, *vap = &va; - struct nfsheur *nh; - off_t off; - int ioflag = 0; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - if (v3) { - tl = nfsm_dissect_nonblock(u_int32_t *, 2 * NFSX_UNSIGNED); - off = fxdr_hyper(tl); - } else { - tl = nfsm_dissect_nonblock(u_int32_t *, NFSX_UNSIGNED); - off = (off_t)fxdr_unsigned(u_int32_t, *tl); - } - nfsm_srvstrsiz(reqlen, NFS_SRVMAXDATA(nfsd)); - - /* - * Reference vp. If an error occurs, vp will be invalid, but we - * have to NULL it just in case. The macros might goto nfsmout - * as well. - */ - - error = nfsrv_fhtovp(fhp, 0, &vp, nfsd, slp, nam, &rdonly); - if (error) { - vp = NULL; - nfsm_reply(2 * NFSX_UNSIGNED); - if (v3) - nfsm_srvpostop_attr(1, NULL); - error = 0; - goto nfsmout; - } - - if (vp->v_type != VREG) { - if (v3) - error = EINVAL; - else - error = (vp->v_type == VDIR) ? EISDIR : EACCES; - } - if (!error) { - if ((error = nfsrv_access(vp, VREAD, cred, rdonly, 1)) != 0) - error = nfsrv_access(vp, VEXEC, cred, rdonly, 1); - } - getret = VOP_GETATTR(vp, vap, cred); - if (!error) - error = getret; - if (error) { - vput(vp); - vp = NULL; - nfsm_reply(NFSX_POSTOPATTR(v3)); - if (v3) - nfsm_srvpostop_attr(getret, vap); - error = 0; - goto nfsmout; - } - - /* - * Calculate byte count to read - */ - if (off >= vap->va_size) - cnt = 0; - else if ((off + reqlen) > vap->va_size) - cnt = vap->va_size - off; - else - cnt = reqlen; - - nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt)); - if (v3) { - tl = nfsm_build(u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); - *tl++ = nfsrv_nfs_true; - fp = (struct nfs_fattr *)tl; - tl += (NFSX_V3FATTR / sizeof (u_int32_t)); - } else { - tl = nfsm_build(u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED); - fp = (struct nfs_fattr *)tl; - tl += (NFSX_V2FATTR / sizeof (u_int32_t)); - } - len = left = nfsm_rndup(cnt); - if (cnt > 0) { - /* - * Generate the mbuf list with the uio_iov ref. to it. - */ - i = 0; - m = m2 = mb; - while (left > 0) { - siz = min(M_TRAILINGSPACE(m), left); - if (siz > 0) { - left -= siz; - i++; - } - if (left > 0) { - MGET(m, M_WAITOK, MT_DATA); - MCLGET(m, M_WAITOK); - m->m_len = 0; - m2->m_next = m; - m2 = m; - } - } - iv = malloc(i * sizeof (struct iovec), - M_TEMP, M_WAITOK); - uiop->uio_iov = iv2 = iv; - m = mb; - left = len; - i = 0; - while (left > 0) { - if (m == NULL) - panic("nfsrv_read iov"); - siz = min(M_TRAILINGSPACE(m), left); - if (siz > 0) { - iv->iov_base = mtod(m, caddr_t) + m->m_len; - iv->iov_len = siz; - m->m_len += siz; - left -= siz; - iv++; - i++; - } - m = m->m_next; - } - uiop->uio_iovcnt = i; - uiop->uio_offset = off; - uiop->uio_resid = len; - uiop->uio_rw = UIO_READ; - uiop->uio_segflg = UIO_SYSSPACE; - uiop->uio_td = NULL; - nh = nfsrv_sequential_heuristic(uiop, vp); - ioflag |= nh->nh_seqcount << IO_SEQSHIFT; - error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); - if (error == 0) - nh->nh_nextoff = uiop->uio_offset; - free((caddr_t)iv2, M_TEMP); - if (error || (getret = VOP_GETATTR(vp, vap, cred))) { - if (!error) - error = getret; - m_freem(mreq); - vput(vp); - vp = NULL; - nfsm_reply(NFSX_POSTOPATTR(v3)); - if (v3) - nfsm_srvpostop_attr(getret, vap); - error = 0; - goto nfsmout; - } - } else - uiop->uio_resid = 0; - vput(vp); - vp = NULL; - nfsm_srvfillattr(vap, fp); - tlen = len - uiop->uio_resid; - cnt = cnt < tlen ? cnt : tlen; - tlen = nfsm_rndup(cnt); - if (len != tlen || tlen != cnt) - nfsm_adj(mb, len - tlen, tlen - cnt); - if (v3) { - *tl++ = txdr_unsigned(cnt); - if (cnt < reqlen) - *tl++ = nfsrv_nfs_true; - else - *tl++ = nfsrv_nfs_false; - } - *tl = txdr_unsigned(cnt); -nfsmout: - if (vp) - vput(vp); - return(error); -} - -/* - * nfs write service - */ -int -nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct iovec *ivp; - int i, cnt; - struct mbuf *mp; - struct nfs_fattr *fp; - struct iovec *iv; - struct vattr va, forat; - struct vattr *vap = &va; - u_int32_t *tl; - caddr_t bpos; - int error = 0, rdonly, len, forat_ret = 1; - int ioflags, aftat_ret = 1, retlen = 0, zeroing, adjust; - int stable = NFSV3WRITE_FILESYNC; - int v3 = (nfsd->nd_flag & ND_NFSV3); - struct mbuf *mb, *mreq; - struct vnode *vp = NULL; - struct nfsheur *nh; - nfsfh_t nfh; - fhandle_t *fhp; - struct uio io, *uiop = &io; - off_t off; - struct mount *mntp = NULL; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - if (mrep == NULL) { - *mrq = NULL; - error = 0; - goto nfsmout; - } - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - if ((mntp = vfs_getvfs(&fhp->fh_fsid)) == NULL) { - error = ESTALE; - goto ereply; - } - (void) vn_start_write(NULL, &mntp, V_WAIT); - vfs_rel(mntp); /* The write holds a ref. */ - if (v3) { - tl = nfsm_dissect_nonblock(u_int32_t *, 5 * NFSX_UNSIGNED); - off = fxdr_hyper(tl); - tl += 3; - stable = fxdr_unsigned(int, *tl++); - } else { - tl = nfsm_dissect_nonblock(u_int32_t *, 4 * NFSX_UNSIGNED); - off = (off_t)fxdr_unsigned(u_int32_t, *++tl); - tl += 2; - if (nfs_async) - stable = NFSV3WRITE_UNSTABLE; - } - retlen = len = fxdr_unsigned(int32_t, *tl); - cnt = i = 0; - - /* - * For NFS Version 2, it is not obvious what a write of zero length - * should do, but I might as well be consistent with Version 3, - * which is to return ok so long as there are no permission problems. - */ - if (len > 0) { - zeroing = 1; - mp = mrep; - while (mp) { - if (mp == md) { - zeroing = 0; - adjust = dpos - mtod(mp, caddr_t); - mp->m_len -= adjust; - if (mp->m_len > 0 && adjust > 0) - mp->m_data += adjust; - } - if (zeroing) - mp->m_len = 0; - else if (mp->m_len > 0) { - i += mp->m_len; - if (i > len) { - mp->m_len -= (i - len); - zeroing = 1; - } - if (mp->m_len > 0) - cnt++; - } - mp = mp->m_next; - } - } - if (len > NFS_MAXDATA || len < 0 || i < len) { - error = EIO; - nfsm_reply(2 * NFSX_UNSIGNED); - if (v3) - nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap); - error = 0; - goto nfsmout; - } - error = nfsrv_fhtovp(fhp, 0, &vp, nfsd, slp, nam, &rdonly); - if (error) { - vp = NULL; - nfsm_reply(2 * NFSX_UNSIGNED); - if (v3) - nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap); - error = 0; - goto nfsmout; - } - if (v3) - forat_ret = VOP_GETATTR(vp, &forat, cred); - if (vp->v_type != VREG) { - if (v3) - error = EINVAL; - else - error = (vp->v_type == VDIR) ? EISDIR : EACCES; - } - if (!error) - error = nfsrv_access(vp, VWRITE, cred, rdonly, 1); - if (error) { - vput(vp); - vp = NULL; - nfsm_reply(NFSX_WCCDATA(v3)); - if (v3) - nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap); - error = 0; - goto nfsmout; - } - - if (len > 0) { - ivp = malloc(cnt * sizeof (struct iovec), M_TEMP, - M_WAITOK); - uiop->uio_iov = iv = ivp; - uiop->uio_iovcnt = cnt; - mp = mrep; - while (mp) { - if (mp->m_len > 0) { - ivp->iov_base = mtod(mp, caddr_t); - ivp->iov_len = mp->m_len; - ivp++; - } - mp = mp->m_next; - } - - /* - * XXX - * The IO_METASYNC flag indicates that all metadata (and not just - * enough to ensure data integrity) mus be written to stable storage - * synchronously. - * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) - */ - if (stable == NFSV3WRITE_UNSTABLE) - ioflags = IO_NODELOCKED; - else if (stable == NFSV3WRITE_DATASYNC) - ioflags = (IO_SYNC | IO_NODELOCKED); - else - ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); - uiop->uio_resid = len; - uiop->uio_rw = UIO_WRITE; - uiop->uio_segflg = UIO_SYSSPACE; - uiop->uio_td = NULL; - uiop->uio_offset = off; - nh = nfsrv_sequential_heuristic(uiop, vp); - ioflags |= nh->nh_seqcount << IO_SEQSHIFT; - error = VOP_WRITE(vp, uiop, ioflags, cred); - if (error == 0) - nh->nh_nextoff = uiop->uio_offset; - /* Unlocked write. */ - nfsrvstats.srvvop_writes++; - free((caddr_t)iv, M_TEMP); - } - aftat_ret = VOP_GETATTR(vp, vap, cred); - vput(vp); - vp = NULL; - if (!error) - error = aftat_ret; -ereply: - nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) + - 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3)); - if (v3) { - nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap); - if (error) { - error = 0; - goto nfsmout; - } - tl = nfsm_build(u_int32_t *, 4 * NFSX_UNSIGNED); - *tl++ = txdr_unsigned(retlen); - /* - * If nfs_async is set, then pretend the write was FILESYNC. - */ - if (stable == NFSV3WRITE_UNSTABLE && !nfs_async) - *tl++ = txdr_unsigned(stable); - else - *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); - /* - * Actually, there is no need to txdr these fields, - * but it may make the values more human readable, - * for debugging purposes. - */ - if (nfsver.tv_sec == 0) - nfsver = boottime; - *tl++ = txdr_unsigned(nfsver.tv_sec); - *tl = txdr_unsigned(nfsver.tv_usec); - } else if (!error) { - /* v2 non-error case. */ - fp = nfsm_build(struct nfs_fattr *, NFSX_V2FATTR); - nfsm_srvfillattr(vap, fp); - } - error = 0; -nfsmout: - if (vp) - vput(vp); - vn_finished_write(mntp); - return(error); -} - -/* - * nfs create service - * now does a truncate to 0 length via. setattr if it already exists - */ -int -nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct nfs_fattr *fp; - struct vattr va, dirfor, diraft; - struct vattr *vap = &va; - struct nfsv2_sattr *sp; - u_int32_t *tl; - struct nameidata nd; - caddr_t bpos; - int error = 0, rdev, len, tsize, dirfor_ret = 1, diraft_ret = 1; - int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0; - struct mbuf *mb, *mreq; - struct vnode *dirp = NULL; - nfsfh_t nfh; - fhandle_t *fhp; - u_quad_t tempsize; - struct timespec cverf; - struct mount *mp = NULL; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); -#ifndef nolint - rdev = 0; -#endif - ndclear(&nd); - - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) { - error = ESTALE; - goto ereply; - } - (void) vn_start_write(NULL, &mp, V_WAIT); - vfs_rel(mp); /* The write holds a ref. */ - nfsm_srvnamesiz(len); - - nd.ni_cnd.cn_cred = cred; - nd.ni_cnd.cn_nameiop = CREATE; - nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART | NOCACHE; - - /* - * Call namei and do initial cleanup to get a few things - * out of the way. If we get an initial error we cleanup - * and return here to avoid special-casing the invalid nd - * structure through the rest of the case. dirp may be - * set even if an error occurs, but the nd structure will not - * be valid at all if an error occurs so we have to invalidate it - * prior to calling nfsm_reply ( which might goto nfsmout ). - */ - error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos, - &dirp, v3, &dirfor, &dirfor_ret, FALSE); - if (dirp && !v3) { - vrele(dirp); - dirp = NULL; - } - if (error) { - nfsm_reply(NFSX_WCCDATA(v3)); - if (v3) - nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); - error = 0; - goto nfsmout; - } - - /* - * No error. Continue. State: - * - * startdir is valid ( we release this immediately ) - * dirp may be valid - * nd.ni_vp may be valid - * nd.ni_dvp is valid - * - * The error state is set through the code and we may also do some - * opportunistic releasing of vnodes to avoid holding locks through - * NFS I/O. The cleanup at the end is a catch-all - */ - - VATTR_NULL(vap); - if (v3) { - tl = nfsm_dissect_nonblock(u_int32_t *, NFSX_UNSIGNED); - how = fxdr_unsigned(int, *tl); - switch (how) { - case NFSV3CREATE_GUARDED: - if (nd.ni_vp) { - error = EEXIST; - break; - } - /* fall through */ - case NFSV3CREATE_UNCHECKED: - nfsm_srvsattr(vap); - break; - case NFSV3CREATE_EXCLUSIVE: - tl = nfsm_dissect_nonblock(u_int32_t *, - NFSX_V3CREATEVERF); - /* Unique bytes, endianness is not important. */ - cverf.tv_sec = (int32_t)tl[0]; - cverf.tv_nsec = tl[1]; - exclusive_flag = 1; - break; - }; - vap->va_type = VREG; - } else { - sp = nfsm_dissect_nonblock(struct nfsv2_sattr *, NFSX_V2SATTR); - vap->va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); - if (vap->va_type == VNON) - vap->va_type = VREG; - vap->va_mode = nfstov_mode(sp->sa_mode); - switch (vap->va_type) { - case VREG: - tsize = fxdr_unsigned(int32_t, sp->sa_size); - if (tsize != -1) - vap->va_size = (u_quad_t)tsize; - break; - case VCHR: - case VBLK: - case VFIFO: - rdev = fxdr_unsigned(long, sp->sa_size); - break; - default: - break; - }; - } - - /* - * Iff doesn't exist, create it - * otherwise just truncate to 0 length - * should I set the mode too ? - * - * The only possible error we can have at this point is EEXIST. - * nd.ni_vp will also be non-NULL in that case. - */ - if (nd.ni_vp == NULL) { - if (vap->va_mode == (mode_t)VNOVAL) - vap->va_mode = 0; - if (vap->va_type == VREG || vap->va_type == VSOCK) { - error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap); - if (error) - NDFREE(&nd, NDF_ONLY_PNBUF); - else { - if (exclusive_flag) { - exclusive_flag = 0; - VATTR_NULL(vap); - vap->va_atime = cverf; - error = VOP_SETATTR(nd.ni_vp, vap, - cred); - } - } - } else if (vap->va_type == VCHR || vap->va_type == VBLK || - vap->va_type == VFIFO) { - /* - * NFSv2-specific code for creating device nodes - * and fifos. - * - * Handle SysV FIFO node special cases. All other - * devices require super user to access. - */ - if (vap->va_type == VCHR && rdev == 0xffffffff) - vap->va_type = VFIFO; - if (vap->va_type != VFIFO && - (error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV, - 0))) { - goto ereply; - } - vap->va_rdev = rdev; - error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap); - if (error) { - NDFREE(&nd, NDF_ONLY_PNBUF); - goto ereply; - } - vput(nd.ni_vp); - nd.ni_vp = NULL; - - /* - * release dvp prior to lookup - */ - vput(nd.ni_dvp); - nd.ni_dvp = NULL; - /* - * Setup for lookup. - * - * Even though LOCKPARENT was cleared, ni_dvp may - * be garbage. - */ - nd.ni_cnd.cn_nameiop = LOOKUP; - nd.ni_cnd.cn_flags &= ~(LOCKPARENT); - nd.ni_cnd.cn_thread = curthread; - nd.ni_cnd.cn_cred = cred; - error = lookup(&nd); - nd.ni_dvp = NULL; - if (error) - goto ereply; - - if (nd.ni_cnd.cn_flags & ISSYMLINK) { - error = EINVAL; - goto ereply; - } - } else { - error = ENXIO; - } - } else { - if (vap->va_size != -1) { - error = nfsrv_access(nd.ni_vp, VWRITE, - cred, (nd.ni_cnd.cn_flags & RDONLY), 0); - if (!error) { - tempsize = vap->va_size; - VATTR_NULL(vap); - vap->va_size = tempsize; - error = VOP_SETATTR(nd.ni_vp, vap, cred); - } - } - } - - if (!error) { - bzero((caddr_t)fhp, sizeof(nfh)); - fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; - error = VOP_VPTOFH(nd.ni_vp, &fhp->fh_fid); - if (!error) - error = VOP_GETATTR(nd.ni_vp, vap, cred); - } - if (v3) { - if (exclusive_flag && !error && - bcmp(&cverf, &vap->va_atime, sizeof (cverf))) - error = EEXIST; - if (dirp == nd.ni_dvp) - diraft_ret = VOP_GETATTR(dirp, &diraft, cred); - else { - /* Drop the other locks to avoid deadlock. */ - if (nd.ni_dvp) { - if (nd.ni_dvp == nd.ni_vp) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - } - if (nd.ni_vp) - vput(nd.ni_vp); - nd.ni_dvp = NULL; - nd.ni_vp = NULL; - - vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY); - diraft_ret = VOP_GETATTR(dirp, &diraft, cred); - VOP_UNLOCK(dirp, 0); - } - } -ereply: - nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3)); - if (v3) { - if (!error) { - nfsm_srvpostop_fh(fhp); - nfsm_srvpostop_attr(0, vap); - } - nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); - } else if (!error) { - /* v2 non-error case. */ - nfsm_srvfhtom(fhp, v3); - fp = nfsm_build(struct nfs_fattr *, NFSX_V2FATTR); - nfsm_srvfillattr(vap, fp); - } - error = 0; - -nfsmout: - if (nd.ni_dvp) { - if (nd.ni_dvp == nd.ni_vp) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - } - if (nd.ni_vp) - vput(nd.ni_vp); - if (nd.ni_startdir) { - vrele(nd.ni_startdir); - nd.ni_startdir = NULL; - } - if (dirp) - vrele(dirp); - NDFREE(&nd, NDF_ONLY_PNBUF); - vn_finished_write(mp); - return (error); -} - -/* - * nfs v3 mknod service - */ -int -nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct vattr va, dirfor, diraft; - struct vattr *vap = &va; - struct thread *td = curthread; - u_int32_t *tl; - struct nameidata nd; - caddr_t bpos; - int error = 0, len, dirfor_ret = 1, diraft_ret = 1; - u_int32_t major, minor; - enum vtype vtyp; - struct mbuf *mb, *mreq; - struct vnode *vp, *dirp = NULL; - nfsfh_t nfh; - fhandle_t *fhp; - struct mount *mp = NULL; - int v3 = (nfsd->nd_flag & ND_NFSV3); - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - if (!v3) - panic("nfsrv_mknod: v3 proc called on a v2 connection"); - ndclear(&nd); - - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) { - error = ESTALE; - goto ereply; - } - (void) vn_start_write(NULL, &mp, V_WAIT); - vfs_rel(mp); /* The write holds a ref. */ - nfsm_srvnamesiz(len); - - nd.ni_cnd.cn_cred = cred; - nd.ni_cnd.cn_nameiop = CREATE; - nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART | NOCACHE; - - /* - * Handle nfs_namei() call. If an error occurs, the nd structure - * is not valid. However, nfsm_*() routines may still jump to - * nfsmout. - */ - - error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos, - &dirp, v3, &dirfor, &dirfor_ret, FALSE); - if (error) { - nfsm_reply(NFSX_WCCDATA(1)); - nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); - error = 0; - goto nfsmout; - } - tl = nfsm_dissect_nonblock(u_int32_t *, NFSX_UNSIGNED); - vtyp = nfsv3tov_type(*tl); - if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { - error = NFSERR_BADTYPE; - goto out; - } - VATTR_NULL(vap); - nfsm_srvsattr(vap); - if (vtyp == VCHR || vtyp == VBLK) { - tl = nfsm_dissect_nonblock(u_int32_t *, 2 * NFSX_UNSIGNED); - major = fxdr_unsigned(u_int32_t, *tl++); - minor = fxdr_unsigned(u_int32_t, *tl); - vap->va_rdev = makedev(major, minor); - } - - /* - * Iff doesn't exist, create it. - */ - if (nd.ni_vp) { - error = EEXIST; - goto out; - } - vap->va_type = vtyp; - if (vap->va_mode == (mode_t)VNOVAL) - vap->va_mode = 0; - if (vtyp == VSOCK) { - vrele(nd.ni_startdir); - nd.ni_startdir = NULL; - error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap); - if (error) - NDFREE(&nd, NDF_ONLY_PNBUF); - } else { - if (vtyp != VFIFO && (error = priv_check_cred(cred, - PRIV_VFS_MKNOD_DEV, 0))) - goto out; - error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap); - if (error) { - NDFREE(&nd, NDF_ONLY_PNBUF); - goto out; - } - vput(nd.ni_vp); - nd.ni_vp = NULL; - - /* - * Release dvp prior to lookup - */ - vput(nd.ni_dvp); - nd.ni_dvp = NULL; - - nd.ni_cnd.cn_nameiop = LOOKUP; - nd.ni_cnd.cn_flags &= ~(LOCKPARENT); - nd.ni_cnd.cn_thread = td; - nd.ni_cnd.cn_cred = td->td_ucred; - error = lookup(&nd); - nd.ni_dvp = NULL; - - if (error) - goto out; - if (nd.ni_cnd.cn_flags & ISSYMLINK) - error = EINVAL; - } - - /* - * send response, cleanup, return. - */ -out: - vp = nd.ni_vp; - if (!error) { - bzero((caddr_t)fhp, sizeof(nfh)); - fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; - error = VOP_VPTOFH(vp, &fhp->fh_fid); - if (!error) - error = VOP_GETATTR(vp, vap, cred); - } - if (nd.ni_dvp) { - if (nd.ni_dvp == nd.ni_vp) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - nd.ni_dvp = NULL; - } - if (vp) { - vput(vp); - vp = NULL; - nd.ni_vp = NULL; - } - if (nd.ni_startdir) { - vrele(nd.ni_startdir); - nd.ni_startdir = NULL; - } - NDFREE(&nd, NDF_ONLY_PNBUF); - if (dirp) { - vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY); - diraft_ret = VOP_GETATTR(dirp, &diraft, cred); - vput(dirp); - } -ereply: - nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1)); - if (v3) { - if (!error) { - nfsm_srvpostop_fh(fhp); - nfsm_srvpostop_attr(0, vap); - } - nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); - } - vn_finished_write(mp); - return (0); -nfsmout: - if (nd.ni_dvp) { - if (nd.ni_dvp == nd.ni_vp) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - } - if (nd.ni_vp) - vput(nd.ni_vp); - if (dirp) - vrele(dirp); - if (nd.ni_startdir) - vrele(nd.ni_startdir); - NDFREE(&nd, NDF_ONLY_PNBUF); - vn_finished_write(mp); - return (error); -} - -/* - * nfs remove service - */ -int -nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct nameidata nd; - caddr_t bpos; - int error = 0, len, dirfor_ret = 1, diraft_ret = 1; - int v3 = (nfsd->nd_flag & ND_NFSV3); - struct mbuf *mb, *mreq; - struct vnode *dirp; - struct vattr dirfor, diraft; - nfsfh_t nfh; - fhandle_t *fhp; - struct mount *mp = NULL; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - ndclear(&nd); - - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) { - error = ESTALE; - goto ereply; - } - (void) vn_start_write(NULL, &mp, V_WAIT); - vfs_rel(mp); /* The write holds a ref. */ - nfsm_srvnamesiz(len); - - nd.ni_cnd.cn_cred = cred; - nd.ni_cnd.cn_nameiop = DELETE; - nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; - error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos, - &dirp, v3, &dirfor, &dirfor_ret, FALSE); - if (dirp && !v3) { - vrele(dirp); - dirp = NULL; - } - if (error == 0) { - if (nd.ni_vp->v_type == VDIR) { - error = EPERM; /* POSIX */ - goto out; - } - /* - * The root of a mounted filesystem cannot be deleted. - */ - if (nd.ni_vp->v_vflag & VV_ROOT) { - error = EBUSY; - goto out; - } -out: - if (!error) { - error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); - NDFREE(&nd, NDF_ONLY_PNBUF); - } - } - if (dirp && v3) { - if (dirp == nd.ni_dvp) - diraft_ret = VOP_GETATTR(dirp, &diraft, cred); - else { - /* Drop the other locks to avoid deadlock. */ - if (nd.ni_dvp) { - if (nd.ni_dvp == nd.ni_vp) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - } - if (nd.ni_vp) - vput(nd.ni_vp); - nd.ni_dvp = NULL; - nd.ni_vp = NULL; - - vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY); - diraft_ret = VOP_GETATTR(dirp, &diraft, cred); - VOP_UNLOCK(dirp, 0); - } - vrele(dirp); - dirp = NULL; - } -ereply: - nfsm_reply(NFSX_WCCDATA(v3)); - if (v3) - nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); - error = 0; -nfsmout: - NDFREE(&nd, NDF_ONLY_PNBUF); - if (nd.ni_dvp) { - if (nd.ni_dvp == nd.ni_vp) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - } - if (nd.ni_vp) - vput(nd.ni_vp); - vn_finished_write(mp); - return(error); -} - -/* - * nfs rename service - */ -int -nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - caddr_t bpos; - int error = 0, len, len2, fdirfor_ret = 1, fdiraft_ret = 1; - int tdirfor_ret = 1, tdiraft_ret = 1; - int v3 = (nfsd->nd_flag & ND_NFSV3); - struct mbuf *mb, *mreq; - struct nameidata fromnd, tond; - struct vnode *fvp, *tvp, *tdvp, *fdirp = NULL; - struct vnode *tdirp = NULL; - struct vattr fdirfor, fdiraft, tdirfor, tdiraft; - nfsfh_t fnfh, tnfh; - fhandle_t *ffhp, *tfhp; - uid_t saved_uid; - struct mount *mp = NULL; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); -#ifndef nolint - fvp = NULL; -#endif - ffhp = &fnfh.fh_generic; - tfhp = &tnfh.fh_generic; - - /* - * Clear fields incase goto nfsmout occurs from macro. - */ - - ndclear(&fromnd); - ndclear(&tond); - - nfsm_srvmtofh(ffhp); - if ((mp = vfs_getvfs(&ffhp->fh_fsid)) == NULL) { - error = ESTALE; - goto out1; - } - (void) vn_start_write(NULL, &mp, V_WAIT); - vfs_rel(mp); /* The write holds a ref. */ - nfsm_srvnamesiz(len); - /* - * Remember our original uid so that we can reset cr_uid before - * the second nfs_namei() call, in case it is remapped. - */ - saved_uid = cred->cr_uid; - fromnd.ni_cnd.cn_cred = cred; - fromnd.ni_cnd.cn_nameiop = DELETE; - fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; - error = nfs_namei(&fromnd, nfsd, ffhp, len, slp, nam, &md, - &dpos, &fdirp, v3, &fdirfor, &fdirfor_ret, FALSE); - if (fdirp && !v3) { - vrele(fdirp); - fdirp = NULL; - } - if (error) { - nfsm_reply(2 * NFSX_WCCDATA(v3)); - if (v3) { - nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); - nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); - } - error = 0; - goto nfsmout; - } - fvp = fromnd.ni_vp; - nfsm_srvmtofh(tfhp); - nfsm_srvnamesiz(len2); - cred->cr_uid = saved_uid; - tond.ni_cnd.cn_cred = cred; - tond.ni_cnd.cn_nameiop = RENAME; - tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; - error = nfs_namei(&tond, nfsd, tfhp, len2, slp, nam, &md, - &dpos, &tdirp, v3, &tdirfor, &tdirfor_ret, FALSE); - if (tdirp && !v3) { - vrele(tdirp); - tdirp = NULL; - } - if (error) - goto out1; - - tdvp = tond.ni_dvp; - tvp = tond.ni_vp; - if (tvp != NULL) { - if (fvp->v_type == VDIR && tvp->v_type != VDIR) { - if (v3) - error = EEXIST; - else - error = EISDIR; - goto out; - } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { - if (v3) - error = EEXIST; - else - error = ENOTDIR; - goto out; - } - if (tvp->v_type == VDIR && tvp->v_mountedhere) { - if (v3) - error = EXDEV; - else - error = ENOTEMPTY; - goto out; - } - } - if (fvp->v_type == VDIR && fvp->v_mountedhere) { - if (v3) - error = EXDEV; - else - error = ENOTEMPTY; - goto out; - } - if (fvp->v_mount != tdvp->v_mount) { - if (v3) - error = EXDEV; - else - error = ENOTEMPTY; - goto out; - } - if (fvp == tdvp) { - if (v3) - error = EINVAL; - else - error = ENOTEMPTY; - } - /* - * If source is the same as the destination (that is the - * same vnode with the same name in the same directory), - * then there is nothing to do. - */ - if (fvp == tvp && fromnd.ni_dvp == tdvp && - fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && - !bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, - fromnd.ni_cnd.cn_namelen)) - error = -1; -out: - if (!error) { - /* - * The VOP_RENAME function releases all vnode references & - * locks prior to returning so we need to clear the pointers - * to bypass cleanup code later on. - */ - error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, - tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); - fromnd.ni_dvp = NULL; - fromnd.ni_vp = NULL; - tond.ni_dvp = NULL; - tond.ni_vp = NULL; - if (error) { - NDFREE(&fromnd, NDF_ONLY_PNBUF); - NDFREE(&tond, NDF_ONLY_PNBUF); - } - } else { - if (error == -1) - error = 0; - } - /* fall through */ -out1: - nfsm_reply(2 * NFSX_WCCDATA(v3)); - if (v3) { - /* Release existing locks to prevent deadlock. */ - if (tond.ni_dvp) { - if (tond.ni_dvp == tond.ni_vp) - vrele(tond.ni_dvp); - else - vput(tond.ni_dvp); - } - if (tond.ni_vp) - vput(tond.ni_vp); - tond.ni_dvp = NULL; - tond.ni_vp = NULL; - - if (fdirp) { - vn_lock(fdirp, LK_EXCLUSIVE | LK_RETRY); - fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred); - VOP_UNLOCK(fdirp, 0); - } - if (tdirp) { - vn_lock(tdirp, LK_EXCLUSIVE | LK_RETRY); - tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred); - VOP_UNLOCK(tdirp, 0); - } - nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft); - nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft); - } - error = 0; - /* fall through */ - -nfsmout: - /* - * Clear out tond related fields - */ - if (tond.ni_dvp) { - if (tond.ni_dvp == tond.ni_vp) - vrele(tond.ni_dvp); - else - vput(tond.ni_dvp); - } - if (tond.ni_vp) - vput(tond.ni_vp); - if (tdirp) - vrele(tdirp); - if (tond.ni_startdir) - vrele(tond.ni_startdir); - NDFREE(&tond, NDF_ONLY_PNBUF); - /* - * Clear out fromnd related fields - */ - if (fdirp) - vrele(fdirp); - if (fromnd.ni_startdir) - vrele(fromnd.ni_startdir); - NDFREE(&fromnd, NDF_ONLY_PNBUF); - if (fromnd.ni_dvp) - vrele(fromnd.ni_dvp); - if (fromnd.ni_vp) - vrele(fromnd.ni_vp); - - vn_finished_write(mp); - return (error); -} - -/* - * nfs link service - */ -int -nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct nameidata nd; - caddr_t bpos; - int error = 0, rdonly, len, dirfor_ret = 1, diraft_ret = 1; - int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3); - struct mbuf *mb, *mreq; - struct vnode *vp = NULL, *xp, *dirp = NULL; - struct vattr dirfor, diraft, at; - nfsfh_t nfh, dnfh; - fhandle_t *fhp, *dfhp; - struct mount *mp = NULL; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - ndclear(&nd); - - fhp = &nfh.fh_generic; - dfhp = &dnfh.fh_generic; - nfsm_srvmtofh(fhp); - if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) { - error = ESTALE; - goto ereply; - } - (void) vn_start_write(NULL, &mp, V_WAIT); - vfs_rel(mp); /* The write holds a ref. */ - nfsm_srvmtofh(dfhp); - nfsm_srvnamesiz(len); - - error = nfsrv_fhtovp(fhp, 0, &vp, nfsd, slp, nam, &rdonly); - if (error) { - nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); - if (v3) { - nfsm_srvpostop_attr(getret, &at); - nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); - } - vp = NULL; - error = 0; - goto nfsmout; - } - if (v3) - getret = VOP_GETATTR(vp, &at, cred); - if (vp->v_type == VDIR) { - error = EPERM; /* POSIX */ - goto out1; - } - VOP_UNLOCK(vp, 0); - nd.ni_cnd.cn_cred = cred; - nd.ni_cnd.cn_nameiop = CREATE; - nd.ni_cnd.cn_flags = LOCKPARENT | NOCACHE; - error = nfs_namei(&nd, nfsd, dfhp, len, slp, nam, &md, &dpos, - &dirp, v3, &dirfor, &dirfor_ret, FALSE); - if (dirp && !v3) { - vrele(dirp); - dirp = NULL; - } - if (error) { - vrele(vp); - vp = NULL; - goto out2; - } - xp = nd.ni_vp; - if (xp != NULL) { - error = EEXIST; - vrele(vp); - vp = NULL; - goto out2; - } - xp = nd.ni_dvp; - if (vp->v_mount != xp->v_mount) { - error = EXDEV; - vrele(vp); - vp = NULL; - goto out2; - } - vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); - error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); - NDFREE(&nd, NDF_ONLY_PNBUF); - /* fall through */ - -out1: - if (v3) - getret = VOP_GETATTR(vp, &at, cred); -out2: - if (dirp) { - if (dirp == nd.ni_dvp) - diraft_ret = VOP_GETATTR(dirp, &diraft, cred); - else { - /* Release existing locks to prevent deadlock. */ - if (nd.ni_dvp) { - if (nd.ni_dvp == nd.ni_vp) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - } - if (nd.ni_vp) - vrele(nd.ni_vp); - nd.ni_dvp = NULL; - nd.ni_vp = NULL; - - vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY); - diraft_ret = VOP_GETATTR(dirp, &diraft, cred); - VOP_UNLOCK(dirp, 0); - } - } -ereply: - nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); - if (v3) { - nfsm_srvpostop_attr(getret, &at); - nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); - } - error = 0; - /* fall through */ - -nfsmout: - NDFREE(&nd, NDF_ONLY_PNBUF); - if (vp) - vput(vp); - if (nd.ni_dvp) { - if (nd.ni_dvp == nd.ni_vp) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - } - if (dirp) - vrele(dirp); - if (nd.ni_vp) - vrele(nd.ni_vp); - vn_finished_write(mp); - return(error); -} - -/* - * nfs symbolic link service - */ -int -nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct vattr va, dirfor, diraft; - struct nameidata nd; - struct vattr *vap = &va; - struct nfsv2_sattr *sp; - char *bpos, *pathcp = NULL; - struct uio io; - struct iovec iv; - int error = 0, len, len2, dirfor_ret = 1, diraft_ret = 1; - int v3 = (nfsd->nd_flag & ND_NFSV3); - struct mbuf *mb, *mreq; - struct vnode *dirp = NULL; - nfsfh_t nfh; - fhandle_t *fhp; - struct mount *mp = NULL; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - ndclear(&nd); - - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) { - error = ESTALE; - goto out; - } - (void) vn_start_write(NULL, &mp, V_WAIT); - vfs_rel(mp); /* The write holds a ref. */ - nfsm_srvnamesiz(len); - nd.ni_cnd.cn_cred = cred; - nd.ni_cnd.cn_nameiop = CREATE; - nd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART | NOCACHE; - error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos, - &dirp, v3, &dirfor, &dirfor_ret, FALSE); - if (error == 0) { - VATTR_NULL(vap); - if (v3) - nfsm_srvsattr(vap); - nfsm_srvpathsiz(len2); - } - if (dirp && !v3) { - vrele(dirp); - dirp = NULL; - } - if (error) - goto out; - pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK); - iv.iov_base = pathcp; - iv.iov_len = len2; - io.uio_resid = len2; - io.uio_offset = 0; - io.uio_iov = &iv; - io.uio_iovcnt = 1; - io.uio_segflg = UIO_SYSSPACE; - io.uio_rw = UIO_READ; - io.uio_td = NULL; - nfsm_mtouio(&io, len2); - if (!v3) { - sp = nfsm_dissect_nonblock(struct nfsv2_sattr *, NFSX_V2SATTR); - vap->va_mode = nfstov_mode(sp->sa_mode); - } - *(pathcp + len2) = '\0'; - if (nd.ni_vp) { - error = EEXIST; - goto out; - } - - /* - * issue symlink op. SAVESTART is set so the underlying path component - * is only freed by the VOP if an error occurs. - */ - if (vap->va_mode == (mode_t)VNOVAL) - vap->va_mode = 0; - error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap, pathcp); - if (error) - NDFREE(&nd, NDF_ONLY_PNBUF); - else - vput(nd.ni_vp); - nd.ni_vp = NULL; - /* - * releases directory prior to potential lookup op. - */ - vput(nd.ni_dvp); - nd.ni_dvp = NULL; - - if (error == 0) { - if (v3) { - /* - * Issue lookup. Leave SAVESTART set so we can easily free - * the name buffer later on. - * - * since LOCKPARENT is not set, ni_dvp will be garbage on - * return whether an error occurs or not. - */ - nd.ni_cnd.cn_nameiop = LOOKUP; - nd.ni_cnd.cn_flags &= ~(LOCKPARENT | FOLLOW); - nd.ni_cnd.cn_flags |= (NOFOLLOW | LOCKLEAF); - nd.ni_cnd.cn_thread = curthread; - nd.ni_cnd.cn_cred = cred; - error = lookup(&nd); - nd.ni_dvp = NULL; - - if (error == 0) { - bzero((caddr_t)fhp, sizeof(nfh)); - fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; - error = VOP_VPTOFH(nd.ni_vp, &fhp->fh_fid); - if (!error) - error = VOP_GETATTR(nd.ni_vp, vap, cred); - vput(nd.ni_vp); - nd.ni_vp = NULL; - } - } - } -out: - /* - * These releases aren't strictly required, does even doing them - * make any sense? XXX can nfsm_reply() block? - */ - if (pathcp) { - free(pathcp, M_TEMP); - pathcp = NULL; - } - if (dirp) { - vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY); - diraft_ret = VOP_GETATTR(dirp, &diraft, cred); - VOP_UNLOCK(dirp, 0); - } - if (nd.ni_startdir) { - vrele(nd.ni_startdir); - nd.ni_startdir = NULL; - } - nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); - if (v3) { - if (!error) { - nfsm_srvpostop_fh(fhp); - nfsm_srvpostop_attr(0, vap); - } - nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); - } - error = 0; - /* fall through */ - -nfsmout: - NDFREE(&nd, NDF_ONLY_PNBUF); - if (nd.ni_dvp) { - if (nd.ni_dvp == nd.ni_vp) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - } - if (nd.ni_vp) - vrele(nd.ni_vp); - if (nd.ni_startdir) - vrele(nd.ni_startdir); - if (dirp) - vrele(dirp); - if (pathcp) - free(pathcp, M_TEMP); - - vn_finished_write(mp); - return (error); -} - -/* - * nfs mkdir service - */ -int -nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct vattr va, dirfor, diraft; - struct vattr *vap = &va; - struct nfs_fattr *fp; - struct nameidata nd; - u_int32_t *tl; - caddr_t bpos; - int error = 0, len, dirfor_ret = 1, diraft_ret = 1; - int v3 = (nfsd->nd_flag & ND_NFSV3); - struct mbuf *mb, *mreq; - struct vnode *dirp = NULL; - int vpexcl = 0; - nfsfh_t nfh; - fhandle_t *fhp; - struct mount *mp = NULL; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - ndclear(&nd); - - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) { - error = ESTALE; - goto out; - } - (void) vn_start_write(NULL, &mp, V_WAIT); - vfs_rel(mp); /* The write holds a ref. */ - nfsm_srvnamesiz(len); - nd.ni_cnd.cn_cred = cred; - nd.ni_cnd.cn_nameiop = CREATE; - nd.ni_cnd.cn_flags = LOCKPARENT | NOCACHE; - - error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos, - &dirp, v3, &dirfor, &dirfor_ret, FALSE); - if (dirp && !v3) { - vrele(dirp); - dirp = NULL; - } - if (error) { - nfsm_reply(NFSX_WCCDATA(v3)); - if (v3) - nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); - error = 0; - goto nfsmout; - } - VATTR_NULL(vap); - if (v3) { - nfsm_srvsattr(vap); - } else { - tl = nfsm_dissect_nonblock(u_int32_t *, NFSX_UNSIGNED); - vap->va_mode = nfstov_mode(*tl++); - } - - /* - * At this point nd.ni_dvp is referenced and exclusively locked and - * nd.ni_vp, if it exists, is referenced but not locked. - */ - - vap->va_type = VDIR; - if (nd.ni_vp != NULL) { - NDFREE(&nd, NDF_ONLY_PNBUF); - error = EEXIST; - goto out; - } - - /* - * Issue mkdir op. Since SAVESTART is not set, the pathname - * component is freed by the VOP call. This will fill-in - * nd.ni_vp, reference, and exclusively lock it. - */ - if (vap->va_mode == (mode_t)VNOVAL) - vap->va_mode = 0; - error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap); - NDFREE(&nd, NDF_ONLY_PNBUF); - vpexcl = 1; - - vput(nd.ni_dvp); - nd.ni_dvp = NULL; - - if (!error) { - bzero((caddr_t)fhp, sizeof(nfh)); - fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid; - error = VOP_VPTOFH(nd.ni_vp, &fhp->fh_fid); - if (!error) - error = VOP_GETATTR(nd.ni_vp, vap, cred); - } -out: - if (dirp) { - if (dirp == nd.ni_dvp) { - diraft_ret = VOP_GETATTR(dirp, &diraft, cred); - } else { - /* Release existing locks to prevent deadlock. */ - if (nd.ni_dvp) { - NDFREE(&nd, NDF_ONLY_PNBUF); - if (nd.ni_dvp == nd.ni_vp && vpexcl) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - } - if (nd.ni_vp) { - if (vpexcl) - vput(nd.ni_vp); - else - vrele(nd.ni_vp); - } - nd.ni_dvp = NULL; - nd.ni_vp = NULL; - vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY); - diraft_ret = VOP_GETATTR(dirp, &diraft, cred); - VOP_UNLOCK(dirp, 0); - } - } - nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3)); - if (v3) { - if (!error) { - nfsm_srvpostop_fh(fhp); - nfsm_srvpostop_attr(0, vap); - } - nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); - } else if (!error) { - /* v2 non-error case. */ - nfsm_srvfhtom(fhp, v3); - fp = nfsm_build(struct nfs_fattr *, NFSX_V2FATTR); - nfsm_srvfillattr(vap, fp); - } - error = 0; - /* fall through */ - -nfsmout: - if (nd.ni_dvp) { - NDFREE(&nd, NDF_ONLY_PNBUF); - if (nd.ni_dvp == nd.ni_vp && vpexcl) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - } - if (nd.ni_vp) { - if (vpexcl) - vput(nd.ni_vp); - else - vrele(nd.ni_vp); - } - if (dirp) - vrele(dirp); - vn_finished_write(mp); - return (error); -} - -/* - * nfs rmdir service - */ -int -nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - caddr_t bpos; - int error = 0, len, dirfor_ret = 1, diraft_ret = 1; - int v3 = (nfsd->nd_flag & ND_NFSV3); - struct mbuf *mb, *mreq; - struct vnode *vp, *dirp = NULL; - struct vattr dirfor, diraft; - nfsfh_t nfh; - fhandle_t *fhp; - struct nameidata nd; - struct mount *mp = NULL; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - ndclear(&nd); - - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) { - error = ESTALE; - goto out; - } - (void) vn_start_write(NULL, &mp, V_WAIT); - vfs_rel(mp); /* The write holds a ref. */ - nfsm_srvnamesiz(len); - nd.ni_cnd.cn_cred = cred; - nd.ni_cnd.cn_nameiop = DELETE; - nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; - error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos, - &dirp, v3, &dirfor, &dirfor_ret, FALSE); - if (dirp && !v3) { - vrele(dirp); - dirp = NULL; - } - if (error) { - nfsm_reply(NFSX_WCCDATA(v3)); - if (v3) - nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); - error = 0; - goto nfsmout; - } - vp = nd.ni_vp; - if (vp->v_type != VDIR) { - error = ENOTDIR; - goto out; - } - /* - * No rmdir "." please. - */ - if (nd.ni_dvp == vp) { - error = EINVAL; - goto out; - } - /* - * The root of a mounted filesystem cannot be deleted. - */ - if (vp->v_vflag & VV_ROOT) - error = EBUSY; -out: - /* - * Issue or abort op. Since SAVESTART is not set, path name - * component is freed by the VOP after either. - */ - if (!error) - error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); - NDFREE(&nd, NDF_ONLY_PNBUF); - - if (dirp) { - if (dirp == nd.ni_dvp) - diraft_ret = VOP_GETATTR(dirp, &diraft, cred); - else { - /* Release existing locks to prevent deadlock. */ - if (nd.ni_dvp) { - if (nd.ni_dvp == nd.ni_vp) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - } - if (nd.ni_vp) - vput(nd.ni_vp); - nd.ni_dvp = NULL; - nd.ni_vp = NULL; - vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY); - diraft_ret = VOP_GETATTR(dirp, &diraft, cred); - VOP_UNLOCK(dirp, 0); - } - } - nfsm_reply(NFSX_WCCDATA(v3)); - error = 0; - if (v3) - nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft); - /* fall through */ - -nfsmout: - NDFREE(&nd, NDF_ONLY_PNBUF); - if (nd.ni_dvp) { - if (nd.ni_dvp == nd.ni_vp) - vrele(nd.ni_dvp); - else - vput(nd.ni_dvp); - } - if (nd.ni_vp) - vput(nd.ni_vp); - if (dirp) - vrele(dirp); - - vn_finished_write(mp); - return(error); -} - -/* - * nfs readdir service - * - mallocs what it thinks is enough to read - * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR - * - calls VOP_READDIR() - * - loops around building the reply - * if the output generated exceeds count break out of loop - * The nfsm_clget macro is used here so that the reply will be packed - * tightly in mbuf clusters. - * - it only knows that it has encountered eof when the VOP_READDIR() - * reads nothing - * - as such one readdir rpc will return eof false although you are there - * and then the next will return eof - * - it trims out records with d_fileno == 0 - * this doesn't matter for Unix clients, but they might confuse clients - * for other os'. - * NB: It is tempting to set eof to true if the VOP_READDIR() reads less - * than requested, but this may not apply to all filesystems. For - * example, client NFS does not { although it is never remote mounted - * anyhow } - * The alternate call nfsrv_readdirplus() does lookups as well. - * PS: The NFS protocol spec. does not clarify what the "count" byte - * argument is a count of.. just name strings and file id's or the - * entire reply rpc or ... - * I tried just file name and id sizes and it confused the Sun client, - * so I am using the full rpc size now. The "paranoia.." comment refers - * to including the status longwords that are not a part of the dir. - * "entry" structures, but are in the rpc. - */ -struct flrep { - nfsuint64 fl_off; - u_int32_t fl_postopok; - u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; - u_int32_t fl_fhok; - u_int32_t fl_fhsize; - u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; -}; - -int -nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - char *bp, *be; - struct mbuf *mp; - struct dirent *dp; - caddr_t cp; - u_int32_t *tl; - caddr_t bpos; - struct mbuf *mb, *mreq; - char *cpos, *cend, *rbuf; - struct vnode *vp = NULL; - struct vattr at; - nfsfh_t nfh; - fhandle_t *fhp; - struct uio io; - struct iovec iv; - int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; - int siz, cnt, fullsiz, eofflag, rdonly, ncookies; - int v3 = (nfsd->nd_flag & ND_NFSV3); - u_quad_t off, toff, verf; - u_long *cookies = NULL, *cookiep; /* needs to be int64_t or off_t */ - int is_ufs; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - if (v3) { - tl = nfsm_dissect_nonblock(u_int32_t *, 5 * NFSX_UNSIGNED); - toff = fxdr_hyper(tl); - tl += 2; - verf = fxdr_hyper(tl); - tl += 2; - } else { - tl = nfsm_dissect_nonblock(u_int32_t *, 2 * NFSX_UNSIGNED); - toff = fxdr_unsigned(u_quad_t, *tl++); - verf = 0; /* shut up gcc */ - } - off = toff; - cnt = fxdr_unsigned(int, *tl); - siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); - xfer = NFS_SRVMAXDATA(nfsd); - if (cnt > xfer) - cnt = xfer; - if (siz > xfer) - siz = xfer; - fullsiz = siz; - error = nfsrv_fhtovp(fhp, 0, &vp, nfsd, slp, nam, &rdonly); - if (!error && vp->v_type != VDIR) { - error = ENOTDIR; - vput(vp); - vp = NULL; - } - if (error) { - nfsm_reply(NFSX_UNSIGNED); - if (v3) - nfsm_srvpostop_attr(getret, &at); - error = 0; - goto nfsmout; - } - - /* - * Obtain lock on vnode for this section of the code - */ - if (v3) { - error = getret = VOP_GETATTR(vp, &at, cred); -#if 0 - /* - * XXX This check may be too strict for Solaris 2.5 clients. - */ - if (!error && toff && verf && verf != at.va_filerev) - error = NFSERR_BAD_COOKIE; -#endif - } - if (!error) - error = nfsrv_access(vp, VEXEC, cred, rdonly, 0); - if (error) { - vput(vp); - vp = NULL; - nfsm_reply(NFSX_POSTOPATTR(v3)); - if (v3) - nfsm_srvpostop_attr(getret, &at); - error = 0; - goto nfsmout; - } - is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; - VOP_UNLOCK(vp, 0); - - /* - * end section. Allocate rbuf and continue - */ - rbuf = malloc(siz, M_TEMP, M_WAITOK); -again: - iv.iov_base = rbuf; - iv.iov_len = fullsiz; - io.uio_iov = &iv; - io.uio_iovcnt = 1; - io.uio_offset = (off_t)off; - io.uio_resid = fullsiz; - io.uio_segflg = UIO_SYSSPACE; - io.uio_rw = UIO_READ; - io.uio_td = NULL; - eofflag = 0; - if (cookies) { - free((caddr_t)cookies, M_TEMP); - cookies = NULL; - } - vn_lock(vp, LK_SHARED | LK_RETRY); - error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies); - off = (off_t)io.uio_offset; - if (!cookies && !error) - error = NFSERR_PERM; - if (v3) { - getret = VOP_GETATTR(vp, &at, cred); - if (!error) - error = getret; - } - VOP_UNLOCK(vp, 0); - if (error) { - vrele(vp); - vp = NULL; - free((caddr_t)rbuf, M_TEMP); - if (cookies) - free((caddr_t)cookies, M_TEMP); - nfsm_reply(NFSX_POSTOPATTR(v3)); - if (v3) - nfsm_srvpostop_attr(getret, &at); - error = 0; - goto nfsmout; - } - if (io.uio_resid) { - siz -= io.uio_resid; - - /* - * If nothing read, return eof - * rpc reply - */ - if (siz == 0) { - vrele(vp); - vp = NULL; - nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + - 2 * NFSX_UNSIGNED); - if (v3) { - nfsm_srvpostop_attr(getret, &at); - tl = nfsm_build(u_int32_t *, 4 * NFSX_UNSIGNED); - txdr_hyper(at.va_filerev, tl); - tl += 2; - } else - tl = nfsm_build(u_int32_t *, 2 * NFSX_UNSIGNED); - *tl++ = nfsrv_nfs_false; - *tl = nfsrv_nfs_true; - free((caddr_t)rbuf, M_TEMP); - free((caddr_t)cookies, M_TEMP); - error = 0; - goto nfsmout; - } - } - - /* - * Check for degenerate cases of nothing useful read. - * If so go try again - */ - cpos = rbuf; - cend = rbuf + siz; - dp = (struct dirent *)cpos; - cookiep = cookies; - /* - * For some reason FreeBSD's ufs_readdir() chooses to back the - * directory offset up to a block boundary, so it is necessary to - * skip over the records that precede the requested offset. This - * requires the assumption that file offset cookies monotonically - * increase. - */ - while (cpos < cend && ncookies > 0 && - (dp->d_fileno == 0 || dp->d_type == DT_WHT || - (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { - cpos += dp->d_reclen; - dp = (struct dirent *)cpos; - cookiep++; - ncookies--; - } - if (cpos >= cend || ncookies == 0) { - toff = off; - siz = fullsiz; - goto again; - } - - len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ - nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz); - if (v3) { - nfsm_srvpostop_attr(getret, &at); - tl = nfsm_build(u_int32_t *, 2 * NFSX_UNSIGNED); - txdr_hyper(at.va_filerev, tl); - } - mp = mb; - bp = bpos; - be = bp + M_TRAILINGSPACE(mp); - - /* Loop through the records and build reply */ - while (cpos < cend && ncookies > 0) { - if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { - nlen = dp->d_namlen; - rem = nfsm_rndup(nlen) - nlen; - len += (4 * NFSX_UNSIGNED + nlen + rem); - if (v3) - len += 2 * NFSX_UNSIGNED; - if (len > cnt) { - eofflag = 0; - break; - } - /* - * Build the directory record xdr from - * the dirent entry. - */ - nfsm_clget; - *tl = nfsrv_nfs_true; - bp += NFSX_UNSIGNED; - if (v3) { - nfsm_clget; - *tl = 0; - bp += NFSX_UNSIGNED; - } - nfsm_clget; - *tl = txdr_unsigned(dp->d_fileno); - bp += NFSX_UNSIGNED; - nfsm_clget; - *tl = txdr_unsigned(nlen); - bp += NFSX_UNSIGNED; - - /* And loop around copying the name */ - xfer = nlen; - cp = dp->d_name; - while (xfer > 0) { - nfsm_clget; - if ((bp+xfer) > be) - tsiz = be-bp; - else - tsiz = xfer; - bcopy(cp, bp, tsiz); - bp += tsiz; - xfer -= tsiz; - if (xfer > 0) - cp += tsiz; - } - /* And null pad to an int32_t boundary. */ - for (i = 0; i < rem; i++) - *bp++ = '\0'; - nfsm_clget; - - /* Finish off the record */ - if (v3) { - *tl = 0; - bp += NFSX_UNSIGNED; - nfsm_clget; - } - *tl = txdr_unsigned(*cookiep); - bp += NFSX_UNSIGNED; - } - cpos += dp->d_reclen; - dp = (struct dirent *)cpos; - cookiep++; - ncookies--; - } - vrele(vp); - vp = NULL; - nfsm_clget; - *tl = nfsrv_nfs_false; - bp += NFSX_UNSIGNED; - nfsm_clget; - if (eofflag) - *tl = nfsrv_nfs_true; - else - *tl = nfsrv_nfs_false; - bp += NFSX_UNSIGNED; - if (mp != mb) { - if (bp < be) - mp->m_len = bp - mtod(mp, caddr_t); - } else - mp->m_len += bp - bpos; - free((caddr_t)rbuf, M_TEMP); - free((caddr_t)cookies, M_TEMP); - -nfsmout: - if (vp) - vrele(vp); - return(error); -} - -int -nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - char *bp, *be; - struct mbuf *mp; - struct dirent *dp; - caddr_t cp; - u_int32_t *tl; - caddr_t bpos; - struct mbuf *mb, *mreq; - char *cpos, *cend, *rbuf; - struct vnode *vp = NULL, *nvp; - struct flrep fl; - nfsfh_t nfh; - fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; - struct uio io; - struct iovec iv; - struct vattr va, at, *vap = &va; - struct nfs_fattr *fp; - int len, nlen, rem, xfer, tsiz, i, error = 0, error1, getret = 1; - int vp_locked; - int siz, cnt, fullsiz, eofflag, rdonly, dirlen, ncookies; - u_quad_t off, toff, verf; - u_long *cookies = NULL, *cookiep; /* needs to be int64_t or off_t */ - int v3 = (nfsd->nd_flag & ND_NFSV3); - int usevget = 1; - struct componentname cn; - struct mount *mntp = NULL; - int is_ufs; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - vp_locked = 0; - if (!v3) - panic("nfsrv_readdirplus: v3 proc called on a v2 connection"); - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - tl = nfsm_dissect_nonblock(u_int32_t *, 6 * NFSX_UNSIGNED); - toff = fxdr_hyper(tl); - tl += 2; - verf = fxdr_hyper(tl); - tl += 2; - siz = fxdr_unsigned(int, *tl++); - cnt = fxdr_unsigned(int, *tl); - off = toff; - siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); - xfer = NFS_SRVMAXDATA(nfsd); - if (cnt > xfer) - cnt = xfer; - if (siz > xfer) - siz = xfer; - fullsiz = siz; - error = nfsrv_fhtovp(fhp, NFSRV_FLAG_BUSY, &vp, nfsd, slp, - nam, &rdonly); - if (!error) { - vp_locked = 1; - mntp = vp->v_mount; - if (vp->v_type != VDIR) { - error = ENOTDIR; - vput(vp); - vp = NULL; - vp_locked = 0; - } - } - if (error) { - nfsm_reply(NFSX_UNSIGNED); - nfsm_srvpostop_attr(getret, &at); - error = 0; - goto nfsmout; - } - error = getret = VOP_GETATTR(vp, &at, cred); -#if 0 - /* - * XXX This check may be too strict for Solaris 2.5 clients. - */ - if (!error && toff && verf && verf != at.va_filerev) - error = NFSERR_BAD_COOKIE; -#endif - if (!error) - error = nfsrv_access(vp, VEXEC, cred, rdonly, 0); - if (error) { - vput(vp); - vp_locked = 0; - vp = NULL; - nfsm_reply(NFSX_V3POSTOPATTR); - nfsm_srvpostop_attr(getret, &at); - error = 0; - goto nfsmout; - } - is_ufs = strcmp(vp->v_mount->mnt_vfc->vfc_name, "ufs") == 0; - VOP_UNLOCK(vp, 0); - vp_locked = 0; - rbuf = malloc(siz, M_TEMP, M_WAITOK); -again: - iv.iov_base = rbuf; - iv.iov_len = fullsiz; - io.uio_iov = &iv; - io.uio_iovcnt = 1; - io.uio_offset = (off_t)off; - io.uio_resid = fullsiz; - io.uio_segflg = UIO_SYSSPACE; - io.uio_rw = UIO_READ; - io.uio_td = NULL; - eofflag = 0; - vp_locked = 1; - if (cookies) { - free((caddr_t)cookies, M_TEMP); - cookies = NULL; - } - vn_lock(vp, LK_SHARED | LK_RETRY); - error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies); - off = (u_quad_t)io.uio_offset; - getret = VOP_GETATTR(vp, &at, cred); - VOP_UNLOCK(vp, 0); - vp_locked = 0; - if (!cookies && !error) - error = NFSERR_PERM; - if (!error) - error = getret; - if (error) { - vrele(vp); - vp = NULL; - if (cookies) - free((caddr_t)cookies, M_TEMP); - free((caddr_t)rbuf, M_TEMP); - nfsm_reply(NFSX_V3POSTOPATTR); - nfsm_srvpostop_attr(getret, &at); - error = 0; - goto nfsmout; - } - if (io.uio_resid) { - siz -= io.uio_resid; - - /* - * If nothing read, return eof - * rpc reply - */ - if (siz == 0) { - vrele(vp); - vp = NULL; - nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + - 2 * NFSX_UNSIGNED); - nfsm_srvpostop_attr(getret, &at); - tl = nfsm_build(u_int32_t *, 4 * NFSX_UNSIGNED); - txdr_hyper(at.va_filerev, tl); - tl += 2; - *tl++ = nfsrv_nfs_false; - *tl = nfsrv_nfs_true; - free((caddr_t)cookies, M_TEMP); - free((caddr_t)rbuf, M_TEMP); - error = 0; - goto nfsmout; - } - } - - /* - * Check for degenerate cases of nothing useful read. - * If so go try again - */ - cpos = rbuf; - cend = rbuf + siz; - dp = (struct dirent *)cpos; - cookiep = cookies; - /* - * For some reason FreeBSD's ufs_readdir() chooses to back the - * directory offset up to a block boundary, so it is necessary to - * skip over the records that precede the requested offset. This - * requires the assumption that file offset cookies monotonically - * increase. - */ - while (cpos < cend && ncookies > 0 && - (dp->d_fileno == 0 || dp->d_type == DT_WHT || - (is_ufs == 1 && ((u_quad_t)(*cookiep)) <= toff))) { - cpos += dp->d_reclen; - dp = (struct dirent *)cpos; - cookiep++; - ncookies--; - } - if (cpos >= cend || ncookies == 0) { - toff = off; - siz = fullsiz; - goto again; - } - - dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + - 2 * NFSX_UNSIGNED; - nfsm_reply(cnt); - nfsm_srvpostop_attr(getret, &at); - tl = nfsm_build(u_int32_t *, 2 * NFSX_UNSIGNED); - txdr_hyper(at.va_filerev, tl); - mp = mb; - bp = bpos; - be = bp + M_TRAILINGSPACE(mp); - - /* Loop through the records and build reply */ - while (cpos < cend && ncookies > 0) { - if (dp->d_fileno != 0 && dp->d_type != DT_WHT) { - nlen = dp->d_namlen; - rem = nfsm_rndup(nlen)-nlen; - - if (usevget) { - /* - * For readdir_and_lookup get the vnode using - * the file number. - */ - error = VFS_VGET(mntp, dp->d_fileno, LK_SHARED, - &nvp); - if (error != 0 && error != EOPNOTSUPP) { - error = 0; - goto invalid; - } else if (error == EOPNOTSUPP) { - /* - * VFS_VGET() not supported? - * Let's switch to VOP_LOOKUP(). - */ - error = 0; - usevget = 0; - cn.cn_nameiop = LOOKUP; - cn.cn_flags = ISLASTCN | NOFOLLOW | \ - LOCKSHARED | LOCKLEAF; - cn.cn_lkflags = LK_SHARED | LK_RETRY; - cn.cn_cred = cred; - cn.cn_thread = curthread; - } - } - if (!usevget) { - cn.cn_nameptr = dp->d_name; - cn.cn_namelen = dp->d_namlen; - if (dp->d_namlen == 2 && - dp->d_name[0] == '.' && - dp->d_name[1] == '.') { - cn.cn_flags |= ISDOTDOT; - } else { - cn.cn_flags &= ~ISDOTDOT; - } - if (!vp_locked) { - vn_lock(vp, LK_SHARED | LK_RETRY); - vp_locked = 1; - } - if ((vp->v_vflag & VV_ROOT) != 0 && - (cn.cn_flags & ISDOTDOT) != 0) { - vref(vp); - nvp = vp; - } else if (VOP_LOOKUP(vp, &nvp, &cn) != 0) - goto invalid; - } - - bzero((caddr_t)nfhp, NFSX_V3FH); - nfhp->fh_fsid = nvp->v_mount->mnt_stat.f_fsid; - if ((error1 = VOP_VPTOFH(nvp, &nfhp->fh_fid)) == 0) - error1 = VOP_GETATTR(nvp, vap, cred); - if (!usevget && vp == nvp) - vunref(nvp); - else - vput(nvp); - nvp = NULL; - if (error1 != 0) - goto invalid; - - /* - * If either the dircount or maxcount will be - * exceeded, get out now. Both of these lengths - * are calculated conservatively, including all - * XDR overheads. - */ - len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + - NFSX_V3POSTOPATTR); - dirlen += (6 * NFSX_UNSIGNED + nlen + rem); - if (len > cnt || dirlen > fullsiz) { - eofflag = 0; - break; - } - - /* - * Build the directory record xdr from - * the dirent entry. - */ - fp = (struct nfs_fattr *)&fl.fl_fattr; - nfsm_srvfillattr(vap, fp); - fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); - fl.fl_fhok = nfsrv_nfs_true; - fl.fl_postopok = nfsrv_nfs_true; - fl.fl_off.nfsuquad[0] = 0; - fl.fl_off.nfsuquad[1] = txdr_unsigned(*cookiep); - - nfsm_clget; - *tl = nfsrv_nfs_true; - bp += NFSX_UNSIGNED; - nfsm_clget; - *tl = 0; - bp += NFSX_UNSIGNED; - nfsm_clget; - *tl = txdr_unsigned(dp->d_fileno); - bp += NFSX_UNSIGNED; - nfsm_clget; - *tl = txdr_unsigned(nlen); - bp += NFSX_UNSIGNED; - - /* And loop around copying the name */ - xfer = nlen; - cp = dp->d_name; - while (xfer > 0) { - nfsm_clget; - if ((bp + xfer) > be) - tsiz = be - bp; - else - tsiz = xfer; - bcopy(cp, bp, tsiz); - bp += tsiz; - xfer -= tsiz; - if (xfer > 0) - cp += tsiz; - } - /* And null pad to an int32_t boundary. */ - for (i = 0; i < rem; i++) - *bp++ = '\0'; - - /* - * Now copy the flrep structure out. - */ - xfer = sizeof (struct flrep); - cp = (caddr_t)&fl; - while (xfer > 0) { - nfsm_clget; - if ((bp + xfer) > be) - tsiz = be - bp; - else - tsiz = xfer; - bcopy(cp, bp, tsiz); - bp += tsiz; - xfer -= tsiz; - if (xfer > 0) - cp += tsiz; - } - } -invalid: - cpos += dp->d_reclen; - dp = (struct dirent *)cpos; - cookiep++; - ncookies--; - } - if (!usevget && vp_locked) - vput(vp); - else - vrele(vp); - vp = NULL; - nfsm_clget; - *tl = nfsrv_nfs_false; - bp += NFSX_UNSIGNED; - nfsm_clget; - if (eofflag) - *tl = nfsrv_nfs_true; - else - *tl = nfsrv_nfs_false; - bp += NFSX_UNSIGNED; - if (mp != mb) { - if (bp < be) - mp->m_len = bp - mtod(mp, caddr_t); - } else - mp->m_len += bp - bpos; - free((caddr_t)cookies, M_TEMP); - free((caddr_t)rbuf, M_TEMP); -nfsmout: - if (vp) - vrele(vp); - if (mntp) - vfs_unbusy(mntp); - return(error); -} - -/* - * nfs commit service - */ -int -nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct vattr bfor, aft; - struct vnode *vp = NULL; - nfsfh_t nfh; - fhandle_t *fhp; - u_int32_t *tl; - caddr_t bpos; - int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt; - struct mbuf *mb, *mreq; - u_quad_t off; - struct mount *mp = NULL; - int v3 = (nfsd->nd_flag & ND_NFSV3); - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - if (!v3) - panic("nfsrv_commit: v3 proc called on a v2 connection"); - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) { - error = ESTALE; - goto ereply; - } - (void) vn_start_write(NULL, &mp, V_WAIT); - vfs_rel(mp); /* The write holds a ref. */ - tl = nfsm_dissect_nonblock(u_int32_t *, 3 * NFSX_UNSIGNED); - - /* - * XXX At this time VOP_FSYNC() does not accept offset and byte - * count parameters, so these arguments are useless (someday maybe). - */ - off = fxdr_hyper(tl); - tl += 2; - cnt = fxdr_unsigned(int, *tl); - error = nfsrv_fhtovp(fhp, 0, &vp, nfsd, slp, nam, &rdonly); - if (error) { - nfsm_reply(2 * NFSX_UNSIGNED); - nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); - error = 0; - goto nfsmout; - } - for_ret = VOP_GETATTR(vp, &bfor, cred); - - /* - * RFC 1813 3.3.21: if count is 0, a flush from offset to the end of file - * is done. At this time VOP_FSYNC does not accept offset and byte count - * parameters so call VOP_FSYNC the whole file for now. - */ - if (cnt == 0 || cnt > MAX_COMMIT_COUNT) { - /* - * Give up and do the whole thing - */ - if (vp->v_object && - (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { - VM_OBJECT_WLOCK(vp->v_object); - vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); - VM_OBJECT_WUNLOCK(vp->v_object); - } - error = VOP_FSYNC(vp, MNT_WAIT, curthread); - } else { - /* - * Locate and synchronously write any buffers that fall - * into the requested range. Note: we are assuming that - * f_iosize is a power of 2. - */ - int iosize = vp->v_mount->mnt_stat.f_iosize; - int iomask = iosize - 1; - struct bufobj *bo; - daddr_t lblkno; - - /* - * Align to iosize boundry, super-align to page boundry. - */ - if (off & iomask) { - cnt += off & iomask; - off &= ~(u_quad_t)iomask; - } - if (off & PAGE_MASK) { - cnt += off & PAGE_MASK; - off &= ~(u_quad_t)PAGE_MASK; - } - lblkno = off / iosize; - - if (vp->v_object && - (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { - VM_OBJECT_WLOCK(vp->v_object); - vm_object_page_clean(vp->v_object, off, off + cnt, - OBJPC_SYNC); - VM_OBJECT_WUNLOCK(vp->v_object); - } - - bo = &vp->v_bufobj; - BO_LOCK(bo); - while (cnt > 0) { - struct buf *bp; - - /* - * If we have a buffer and it is marked B_DELWRI we - * have to lock and write it. Otherwise the prior - * write is assumed to have already been committed. - * - * gbincore() can return invalid buffers now so we - * have to check that bit as well (though B_DELWRI - * should not be set if B_INVAL is set there could be - * a race here since we haven't locked the buffer). - */ - if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) { - if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | - LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { - BO_LOCK(bo); - continue; /* retry */ - } - if ((bp->b_flags & (B_DELWRI|B_INVAL)) == - B_DELWRI) { - bremfree(bp); - bp->b_flags &= ~B_ASYNC; - bwrite(bp); - ++nfs_commit_miss; - } else - BUF_UNLOCK(bp); - BO_LOCK(bo); - } - ++nfs_commit_blks; - if (cnt < iosize) - break; - cnt -= iosize; - ++lblkno; - } - BO_UNLOCK(bo); - } - - aft_ret = VOP_GETATTR(vp, &aft, cred); - vput(vp); - vp = NULL; -ereply: - nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF); - nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft); - if (!error) { - tl = nfsm_build(u_int32_t *, NFSX_V3WRITEVERF); - if (nfsver.tv_sec == 0) - nfsver = boottime; - *tl++ = txdr_unsigned(nfsver.tv_sec); - *tl = txdr_unsigned(nfsver.tv_usec); - } else { - error = 0; - } -nfsmout: - if (vp) - vput(vp); - vn_finished_write(mp); - return(error); -} - -/* - * nfs statfs service - */ -int -nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct statfs *sf; - struct nfs_statfs *sfp; - caddr_t bpos; - int error = 0, rdonly, getret = 1; - int v3 = (nfsd->nd_flag & ND_NFSV3); - struct mbuf *mb, *mreq; - struct vnode *vp = NULL; - struct vattr at; - nfsfh_t nfh; - fhandle_t *fhp; - struct statfs statfs; - u_quad_t tval; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - error = nfsrv_fhtovp(fhp, 0, &vp, nfsd, slp, nam, &rdonly); - if (error) { - nfsm_reply(NFSX_UNSIGNED); - if (v3) - nfsm_srvpostop_attr(getret, &at); - error = 0; - goto nfsmout; - } - sf = &statfs; - error = VFS_STATFS(vp->v_mount, sf); - getret = VOP_GETATTR(vp, &at, cred); - vput(vp); - vp = NULL; - nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3)); - if (v3) - nfsm_srvpostop_attr(getret, &at); - if (error) { - error = 0; - goto nfsmout; - } - sfp = nfsm_build(struct nfs_statfs *, NFSX_STATFS(v3)); - if (v3) { - tval = (u_quad_t)sf->f_blocks; - tval *= (u_quad_t)sf->f_bsize; - txdr_hyper(tval, &sfp->sf_tbytes); - tval = (u_quad_t)sf->f_bfree; - tval *= (u_quad_t)sf->f_bsize; - txdr_hyper(tval, &sfp->sf_fbytes); - /* - * Don't send negative values for available space, - * since this field is unsigned in the NFS protocol. - * Otherwise, the client would see absurdly high - * numbers for free space. - */ - if (sf->f_bavail < 0) - tval = 0; - else - tval = (u_quad_t)sf->f_bavail; - tval *= (u_quad_t)sf->f_bsize; - txdr_hyper(tval, &sfp->sf_abytes); - sfp->sf_tfiles.nfsuquad[0] = 0; - sfp->sf_tfiles.nfsuquad[1] = txdr_unsigned(sf->f_files); - sfp->sf_ffiles.nfsuquad[0] = 0; - sfp->sf_ffiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree); - sfp->sf_afiles.nfsuquad[0] = 0; - sfp->sf_afiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree); - sfp->sf_invarsec = 0; - } else { - sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); - sfp->sf_bsize = txdr_unsigned(sf->f_bsize); - sfp->sf_blocks = txdr_unsigned(sf->f_blocks); - sfp->sf_bfree = txdr_unsigned(sf->f_bfree); - if (sf->f_bavail < 0) - sfp->sf_bavail = 0; - else - sfp->sf_bavail = txdr_unsigned(sf->f_bavail); - } -nfsmout: - if (vp) - vput(vp); - return(error); -} - -/* - * nfs fsinfo service - */ -int -nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct nfsv3_fsinfo *sip; - caddr_t bpos; - int error = 0, rdonly, getret = 1, pref; - struct mbuf *mb, *mreq; - struct vnode *vp = NULL; - struct vattr at; - nfsfh_t nfh; - fhandle_t *fhp; - u_quad_t maxfsize; - struct statfs sb; - int v3 = (nfsd->nd_flag & ND_NFSV3); - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - if (!v3) - panic("nfsrv_fsinfo: v3 proc called on a v2 connection"); - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - error = nfsrv_fhtovp(fhp, 0, &vp, nfsd, slp, nam, &rdonly); - if (error) { - nfsm_reply(NFSX_UNSIGNED); - nfsm_srvpostop_attr(getret, &at); - error = 0; - goto nfsmout; - } - - /* XXX Try to make a guess on the max file size. */ - VFS_STATFS(vp->v_mount, &sb); - maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; - - getret = VOP_GETATTR(vp, &at, cred); - vput(vp); - vp = NULL; - nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO); - nfsm_srvpostop_attr(getret, &at); - sip = nfsm_build(struct nfsv3_fsinfo *, NFSX_V3FSINFO); - - /* - * XXX - * There should be filesystem VFS OP(s) to get this information. - * For now, assume ufs. - */ - pref = NFS_SRVMAXDATA(nfsd); - sip->fs_rtmax = txdr_unsigned(pref); - sip->fs_rtpref = txdr_unsigned(pref); - sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); - sip->fs_wtmax = txdr_unsigned(pref); - sip->fs_wtpref = txdr_unsigned(pref); - sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); - sip->fs_dtpref = txdr_unsigned(pref); - txdr_hyper(maxfsize, &sip->fs_maxfilesize); - sip->fs_timedelta.nfsv3_sec = 0; - sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); - sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | - NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | - NFSV3FSINFO_CANSETTIME); -nfsmout: - if (vp) - vput(vp); - return(error); -} - -/* - * nfs pathconf service - */ -int -nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md; - struct sockaddr *nam = nfsd->nd_nam; - caddr_t dpos = nfsd->nd_dpos; - struct ucred *cred = nfsd->nd_cr; - struct nfsv3_pathconf *pc; - caddr_t bpos; - int error = 0, rdonly, getret = 1; - register_t linkmax, namemax, chownres, notrunc; - struct mbuf *mb, *mreq; - struct vnode *vp = NULL; - struct vattr at; - nfsfh_t nfh; - fhandle_t *fhp; - int v3 = (nfsd->nd_flag & ND_NFSV3); - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - if (!v3) - panic("nfsrv_pathconf: v3 proc called on a v2 connection"); - fhp = &nfh.fh_generic; - nfsm_srvmtofh(fhp); - error = nfsrv_fhtovp(fhp, 0, &vp, nfsd, slp, nam, &rdonly); - if (error) { - nfsm_reply(NFSX_UNSIGNED); - nfsm_srvpostop_attr(getret, &at); - error = 0; - goto nfsmout; - } - error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); - if (!error) - error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); - if (!error) - error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); - if (!error) - error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); - getret = VOP_GETATTR(vp, &at, cred); - vput(vp); - vp = NULL; - nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF); - nfsm_srvpostop_attr(getret, &at); - if (error) { - error = 0; - goto nfsmout; - } - pc = nfsm_build(struct nfsv3_pathconf *, NFSX_V3PATHCONF); - - pc->pc_linkmax = txdr_unsigned(linkmax); - pc->pc_namemax = txdr_unsigned(namemax); - pc->pc_notrunc = txdr_unsigned(notrunc); - pc->pc_chownrestricted = txdr_unsigned(chownres); - - /* - * These should probably be supported by VOP_PATHCONF(), but - * until msdosfs is exportable (why would you want to?), the - * Unix defaults should be ok. - */ - pc->pc_caseinsensitive = nfsrv_nfs_false; - pc->pc_casepreserving = nfsrv_nfs_true; -nfsmout: - if (vp) - vput(vp); - return(error); -} - -/* - * Null operation, used by clients to ping server - */ -/* ARGSUSED */ -int -nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep; - caddr_t bpos; - int error = NFSERR_RETVOID; - struct mbuf *mb, *mreq; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - nfsm_reply(0); -nfsmout: - return (error); -} - -/* - * No operation, used for obsolete procedures - */ -/* ARGSUSED */ -int -nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, - struct mbuf **mrq) -{ - struct mbuf *mrep = nfsd->nd_mrep; - caddr_t bpos; - int error; - struct mbuf *mb, *mreq; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - if (nfsd->nd_repstat) - error = nfsd->nd_repstat; - else - error = EPROCUNAVAIL; - nfsm_reply(0); - error = 0; -nfsmout: - return (error); -} - -/* - * Perform access checking for vnodes obtained from file handles that would - * refer to files already opened by a Unix client. You cannot just use - * vn_writechk() and VOP_ACCESS() for two reasons. - * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write - * case. - * 2 - The owner is to be given access irrespective of mode bits for some - * operations, so that processes that chmod after opening a file don't - * break. I don't like this because it opens a security hole, but since - * the nfs server opens a security hole the size of a barn door anyhow, - * what the heck. - * - * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() - * will return EPERM instead of EACCES. EPERM is always an error. - */ -static int -nfsrv_access(struct vnode *vp, accmode_t accmode, struct ucred *cred, - int rdonly, int override) -{ - struct vattr vattr; - int error; - - nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); - - if (accmode & VWRITE) { - /* Just vn_writechk() changed to check rdonly */ - /* - * Disallow write attempts on read-only filesystems; - * unless the file is a socket or a block or character - * device resident on the filesystem. - */ - if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { - switch (vp->v_type) { - case VREG: - case VDIR: - case VLNK: - return (EROFS); - default: - break; - } - } - /* - * If there's shared text associated with - * the inode, we can't allow writing. - */ - if (VOP_IS_TEXT(vp)) - return (ETXTBSY); - } - - error = VOP_GETATTR(vp, &vattr, cred); - if (error) - return (error); - error = VOP_ACCESS(vp, accmode, cred, curthread); - /* - * Allow certain operations for the owner (reads and writes - * on files that are already open). - */ - if (override && error == EACCES && cred->cr_uid == vattr.va_uid) - error = 0; - return (error); -} |
