/* $NetBSD: nfs_vnops.c,v 1.325 2023/12/10 18:16:08 schmonz Exp $ */ /* * 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 */ /* * vnode op calls for Sun NFS version 2 and 3 */ #include __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.325 2023/12/10 18:16:08 schmonz Exp $"); #ifdef _KERNEL_OPT #include "opt_nfs.h" #include "opt_uvmhist.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef UVMHIST #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Global vfs data structures for nfs */ int (**nfsv2_vnodeop_p)(void *); const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { { &vop_default_desc, vn_default_error }, { &vop_parsepath_desc, genfs_parsepath }, /* parsepath */ { &vop_lookup_desc, nfs_lookup }, /* lookup */ { &vop_create_desc, nfs_create }, /* create */ { &vop_mknod_desc, nfs_mknod }, /* mknod */ { &vop_open_desc, nfs_open }, /* open */ { &vop_close_desc, nfs_close }, /* close */ { &vop_access_desc, nfs_access }, /* access */ { &vop_accessx_desc, genfs_accessx }, /* accessx */ { &vop_getattr_desc, nfs_getattr }, /* getattr */ { &vop_setattr_desc, nfs_setattr }, /* setattr */ { &vop_read_desc, nfs_read }, /* read */ { &vop_write_desc, nfs_write }, /* write */ { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ { &vop_poll_desc, genfs_poll }, /* poll */ { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ { &vop_revoke_desc, genfs_revoke }, /* revoke */ { &vop_mmap_desc, genfs_mmap }, /* mmap */ { &vop_fsync_desc, nfs_fsync }, /* fsync */ { &vop_seek_desc, genfs_seek }, /* seek */ { &vop_remove_desc, nfs_remove }, /* remove */ { &vop_link_desc, nfs_link }, /* link */ { &vop_rename_desc, nfs_rename }, /* rename */ { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ { &vop_symlink_desc, nfs_symlink }, /* symlink */ { &vop_readdir_desc, nfs_readdir }, /* readdir */ { &vop_readlink_desc, nfs_readlink }, /* readlink */ { &vop_abortop_desc, genfs_abortop }, /* abortop */ { &vop_inactive_desc, nfs_inactive }, /* inactive */ { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ { &vop_lock_desc, genfs_lock }, /* lock */ { &vop_unlock_desc, nfs_unlock }, /* unlock */ { &vop_bmap_desc, nfs_bmap }, /* bmap */ { &vop_strategy_desc, nfs_strategy }, /* strategy */ { &vop_print_desc, nfs_print }, /* print */ { &vop_islocked_desc, genfs_islocked }, /* islocked */ { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ { &vop_advlock_desc, nfs_advlock }, /* advlock */ { &vop_bwrite_desc, genfs_badop }, /* bwrite */ { &vop_getpages_desc, nfs_getpages }, /* getpages */ { &vop_putpages_desc, genfs_putpages }, /* putpages */ { NULL, NULL } }; const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; /* * Special device vnode ops */ int (**spec_nfsv2nodeop_p)(void *); const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { { &vop_default_desc, vn_default_error }, GENFS_SPECOP_ENTRIES, { &vop_close_desc, nfsspec_close }, /* close */ { &vop_access_desc, nfsspec_access }, /* access */ { &vop_accessx_desc, genfs_accessx }, /* accessx */ { &vop_getattr_desc, nfs_getattr }, /* getattr */ { &vop_setattr_desc, nfs_setattr }, /* setattr */ { &vop_read_desc, nfsspec_read }, /* read */ { &vop_write_desc, nfsspec_write }, /* write */ { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ { &vop_fsync_desc, spec_fsync }, /* fsync */ { &vop_inactive_desc, nfs_inactive }, /* inactive */ { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ { &vop_lock_desc, genfs_lock }, /* lock */ { &vop_unlock_desc, nfs_unlock }, /* unlock */ { &vop_print_desc, nfs_print }, /* print */ { &vop_islocked_desc, genfs_islocked }, /* islocked */ { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ { NULL, NULL } }; const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; int (**fifo_nfsv2nodeop_p)(void *); const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { { &vop_default_desc, vn_default_error }, GENFS_FIFOOP_ENTRIES, { &vop_close_desc, nfsfifo_close }, /* close */ { &vop_access_desc, nfsspec_access }, /* access */ { &vop_accessx_desc, genfs_accessx }, /* accessx */ { &vop_getattr_desc, nfs_getattr }, /* getattr */ { &vop_setattr_desc, nfs_setattr }, /* setattr */ { &vop_read_desc, nfsfifo_read }, /* read */ { &vop_write_desc, nfsfifo_write }, /* write */ { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ { &vop_fsync_desc, nfs_fsync }, /* fsync */ { &vop_inactive_desc, nfs_inactive }, /* inactive */ { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ { &vop_lock_desc, genfs_lock }, /* lock */ { &vop_unlock_desc, nfs_unlock }, /* unlock */ { &vop_strategy_desc, vn_fifo_bypass }, /* strategy */ { &vop_print_desc, nfs_print }, /* print */ { &vop_islocked_desc, genfs_islocked }, /* islocked */ { &vop_bwrite_desc, genfs_badop }, /* bwrite */ { NULL, NULL } }; const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; static int nfs_linkrpc(struct vnode *, struct vnode *, const char *, size_t, kauth_cred_t, struct lwp *); static void nfs_writerpc_extfree(struct mbuf *, void *, size_t, void *); /* * Global variables */ extern u_int32_t nfs_true, nfs_false; extern u_int32_t nfs_xdrneg1; extern const nfstype nfsv3_type[9]; int nfs_numasync = 0; #define DIRHDSIZ _DIRENT_NAMEOFF(dp) #define UIO_ADVANCE(uio, siz) \ (void)((uio)->uio_resid -= (siz), \ (uio)->uio_iov->iov_base = (char *)(uio)->uio_iov->iov_base + (siz), \ (uio)->uio_iov->iov_len -= (siz)) static void nfs_cache_enter(struct vnode *, struct vnode *, struct componentname *); static void nfs_cache_enter(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) { struct nfsnode *dnp = VTONFS(dvp); if ((cnp->cn_flags & MAKEENTRY) == 0) { return; } if (vp != NULL) { struct nfsnode *np = VTONFS(vp); np->n_ctime = np->n_vattr->va_ctime.tv_sec; } if (!timespecisset(&dnp->n_nctime)) dnp->n_nctime = dnp->n_vattr->va_mtime; cache_enter(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, cnp->cn_flags); } /* * nfs null call from vfs. */ int nfs_null(struct vnode *vp, kauth_cred_t cred, struct lwp *l) { char *bpos, *dpos; int error = 0; struct mbuf *mreq, *mrep, *md, *mb __unused; struct nfsnode *np = VTONFS(vp); nfsm_reqhead(np, NFSPROC_NULL, 0); nfsm_request(np, NFSPROC_NULL, l, cred); nfsm_reqdone; return (error); } /* * nfs access vnode op. * For nfs version 2, just return ok. File accesses may fail later. * For nfs version 3, use the access rpc to check accessibility. If file modes * are changed on the server, accesses might still fail later. */ int nfs_access(void *v) { struct vop_access_args /* { struct vnode *a_vp; accmode_t a_accmode; kauth_cred_t a_cred; } */ *ap = v; struct vnode *vp = ap->a_vp; #ifndef NFS_V2_ONLY u_int32_t *tl; char *cp; int32_t t1, t2; char *bpos, *dpos, *cp2; int error = 0, attrflag; struct mbuf *mreq, *mrep, *md, *mb; u_int32_t mode, rmode; const int v3 = NFS_ISV3(vp); #endif int cachevalid; struct nfsnode *np = VTONFS(vp); struct nfsmount *nmp = VFSTONFS(vp->v_mount); cachevalid = (np->n_accstamp != -1 && (time_uptime - np->n_accstamp) < nfs_attrtimeo(nmp, np) && np->n_accuid == kauth_cred_geteuid(ap->a_cred)); /* * Check access cache first. If this request has been made for this * uid shortly before, use the cached result. */ if (cachevalid) { if (!np->n_accerror) { if ((np->n_accmode & ap->a_accmode) == ap->a_accmode) return np->n_accerror; } else if ((np->n_accmode & ap->a_accmode) == np->n_accmode) return np->n_accerror; } #ifndef NFS_V2_ONLY /* * For nfs v3, do an access rpc, otherwise you are stuck emulating * ufs_access() locally using the vattr. This may not be correct, * since the server may apply other access criteria such as * client uid-->server uid mapping that we do not know about, but * this is better than just returning anything that is lying about * in the cache. */ if (v3) { nfsstats.rpccnt[NFSPROC_ACCESS]++; nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); nfsm_fhtom(np, v3); nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); if (ap->a_accmode & VREAD) mode = NFSV3ACCESS_READ; else mode = 0; if (vp->v_type != VDIR) { if (ap->a_accmode & VWRITE) mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); if (ap->a_accmode & VEXEC) mode |= NFSV3ACCESS_EXECUTE; } else { if (ap->a_accmode & VWRITE) mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | NFSV3ACCESS_DELETE); if (ap->a_accmode & VEXEC) mode |= NFSV3ACCESS_LOOKUP; } *tl = txdr_unsigned(mode); nfsm_request(np, NFSPROC_ACCESS, curlwp, ap->a_cred); nfsm_postop_attr(vp, attrflag, 0); if (!error) { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); rmode = fxdr_unsigned(u_int32_t, *tl); /* * The NFS V3 spec does not clarify whether or not * the returned access bits can be a superset of * the ones requested, so... */ if ((rmode & mode) != mode) error = EACCES; } nfsm_reqdone; } else #endif return (nfsspec_access(ap)); #ifndef NFS_V2_ONLY /* * Disallow write attempts on filesystems mounted read-only; * unless the file is a socket, fifo, or a block or character * device resident on the filesystem. */ if (!error && (ap->a_accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { switch (vp->v_type) { case VREG: case VDIR: case VLNK: error = EROFS; default: break; } } if (!error || error == EACCES) { /* * If we got the same result as for a previous, * different request, OR it in. Don't update * the timestamp in that case. */ if (cachevalid && np->n_accstamp != -1 && error == np->n_accerror) { if (!error) np->n_accmode |= ap->a_accmode; else if ((np->n_accmode & ap->a_accmode) == ap->a_accmode) np->n_accmode = ap->a_accmode; } else { np->n_accstamp = time_uptime; np->n_accuid = kauth_cred_geteuid(ap->a_cred); np->n_accmode = ap->a_accmode; np->n_accerror = error; } } return (error); #endif } /* * nfs open vnode op * Check to see if the type is ok * and that deletion is not in progress. * For paged in text files, you will need to flush the page cache * if consistency is lost. */ /* ARGSUSED */ int nfs_open(void *v) { struct vop_open_args /* { struct vnode *a_vp; int a_mode; kauth_cred_t a_cred; } */ *ap = v; struct vnode *vp = ap->a_vp; struct nfsnode *np = VTONFS(vp); int error; if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { return (EACCES); } if (ap->a_mode & FREAD) { if (np->n_rcred != NULL) kauth_cred_free(np->n_rcred); np->n_rcred = ap->a_cred; kauth_cred_hold(np->n_rcred); } if (ap->a_mode & FWRITE) { if (np->n_wcred != NULL) kauth_cred_free(np->n_wcred); np->n_wcred = ap->a_cred; kauth_cred_hold(np->n_wcred); } error = nfs_flushstalebuf(vp, ap->a_cred, curlwp, 0); if (error) return error; NFS_INVALIDATE_ATTRCACHE(np); /* For Open/Close consistency */ return (0); } /* * nfs close vnode op * What an NFS client should do upon close after writing is a debatable issue. * Most NFS clients push delayed writes to the server upon close, basically for * two reasons: * 1 - So that any write errors may be reported back to the client process * doing the close system call. By far the two most likely errors are * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. * 2 - To put a worst case upper bound on cache inconsistency between * multiple clients for the file. * There is also a consistency problem for Version 2 of the protocol w.r.t. * not being able to tell if other clients are writing a file concurrently, * since there is no way of knowing if the changed modify time in the reply * is only due to the write for this client. * (NFS Version 3 provides weak cache consistency data in the reply that * should be sufficient to detect and handle this case.) * * The current code does the following: * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers * for NFS Version 3 - flush dirty buffers to the server but don't invalidate * or commit them (this satisfies 1 and 2 except for the * case where the server crashes after this close but * before the commit RPC, which is felt to be "good * enough". Changing the last argument to nfs_flush() to * a 1 would force a commit operation, if it is felt a * commit is necessary now. */ /* ARGSUSED */ int nfs_close(void *v) { struct vop_close_args /* { struct vnodeop_desc *a_desc; struct vnode *a_vp; int a_fflag; kauth_cred_t a_cred; } */ *ap = v; struct vnode *vp = ap->a_vp; struct nfsnode *np = VTONFS(vp); int error = 0; UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); if (vp->v_type == VREG) { if (np->n_flag & NMODIFIED) { #ifndef NFS_V2_ONLY if (NFS_ISV3(vp)) { error = nfs_flush(vp, ap->a_cred, MNT_WAIT, curlwp, 0); np->n_flag &= ~NMODIFIED; } else #endif error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, curlwp, 1); NFS_INVALIDATE_ATTRCACHE(np); } if (np->n_flag & NWRITEERR) { np->n_flag &= ~NWRITEERR; error = np->n_error; } } UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); return (error); } /* * nfs getattr call from vfs. */ int nfs_getattr(void *v) { struct vop_getattr_args /* { struct vnode *a_vp; struct vattr *a_vap; kauth_cred_t a_cred; } */ *ap = v; struct vnode *vp = ap->a_vp; struct nfsnode *np = VTONFS(vp); char *cp; u_int32_t *tl; int32_t t1, t2; char *bpos, *dpos; int error = 0; struct mbuf *mreq, *mrep, *md, *mb; const int v3 = NFS_ISV3(vp); /* * Update local times for special files. */ if (np->n_flag & (NACC | NUPD)) np->n_flag |= NCHG; /* * if we have delayed truncation, do it now. */ nfs_delayedtruncate(vp); /* * First look in the cache. */ if (nfs_getattrcache(vp, ap->a_vap) == 0) return (0); nfsstats.rpccnt[NFSPROC_GETATTR]++; nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); nfsm_fhtom(np, v3); nfsm_request(np, NFSPROC_GETATTR, curlwp, ap->a_cred); if (!error) { nfsm_loadattr(vp, ap->a_vap, 0); if (vp->v_type == VDIR && ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; } nfsm_reqdone; return (error); } /* * nfs setattr call. */ int nfs_setattr(void *v) { struct vop_setattr_args /* { struct vnodeop_desc *a_desc; struct vnode *a_vp; struct vattr *a_vap; kauth_cred_t a_cred; } */ *ap = v; struct vnode *vp = ap->a_vp; struct nfsnode *np = VTONFS(vp); struct vattr *vap = ap->a_vap; int error = 0; u_quad_t tsize = 0; /* * Setting of flags is not supported. */ if (vap->va_flags != VNOVAL) return (EOPNOTSUPP); /* * Disallow write attempts if the filesystem is mounted read-only. */ if ((vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && (vp->v_mount->mnt_flag & MNT_RDONLY)) return (EROFS); if (vap->va_size != VNOVAL) { if (vap->va_size > VFSTONFS(vp->v_mount)->nm_maxfilesize) { return EFBIG; } switch (vp->v_type) { case VDIR: return (EISDIR); case VCHR: case VBLK: case VSOCK: case VFIFO: if (vap->va_mtime.tv_sec == VNOVAL && vap->va_atime.tv_sec == VNOVAL && vap->va_mode == (mode_t)VNOVAL && vap->va_uid == (uid_t)VNOVAL && vap->va_gid == (gid_t)VNOVAL) return (0); vap->va_size = VNOVAL; break; default: /* * Disallow write attempts if the filesystem is * mounted read-only. */ if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); genfs_node_wrlock(vp); uvm_vnp_setsize(vp, vap->va_size); tsize = np->n_size; np->n_size = vap->va_size; if (vap->va_size == 0) error = nfs_vinvalbuf(vp, 0, ap->a_cred, curlwp, 1); else error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, curlwp, 1); if (error) { uvm_vnp_setsize(vp, tsize); genfs_node_unlock(vp); return (error); } np->n_vattr->va_size = vap->va_size; } } else { /* * flush files before setattr because a later write of * cached data might change timestamps or reset sugid bits */ if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL || vap->va_mode != VNOVAL) && vp->v_type == VREG && (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, curlwp, 1)) == EINTR) return (error); } error = nfs_setattrrpc(vp, vap, ap->a_cred, curlwp); if (vap->va_size != VNOVAL) { if (error) { np->n_size = np->n_vattr->va_size = tsize; uvm_vnp_setsize(vp, np->n_size); } genfs_node_unlock(vp); } return (error); } /* * Do an nfs setattr rpc. */ int nfs_setattrrpc(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, struct lwp *l) { struct nfsv2_sattr *sp; char *cp; int32_t t1, t2; char *bpos, *dpos; u_int32_t *tl; int error = 0; struct mbuf *mreq, *mrep, *md, *mb; const int v3 = NFS_ISV3(vp); struct nfsnode *np = VTONFS(vp); #ifndef NFS_V2_ONLY int wccflag = NFSV3_WCCRATTR; char *cp2; #endif nfsstats.rpccnt[NFSPROC_SETATTR]++; nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); nfsm_fhtom(np, v3); #ifndef NFS_V2_ONLY if (v3) { nfsm_v3attrbuild(vap, true); nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); *tl = nfs_false; } else { #endif nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); if (vap->va_mode == (mode_t)VNOVAL) sp->sa_mode = nfs_xdrneg1; else sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); if (vap->va_uid == (uid_t)VNOVAL) sp->sa_uid = nfs_xdrneg1; else sp->sa_uid = txdr_unsigned(vap->va_uid); if (vap->va_gid == (gid_t)VNOVAL) sp->sa_gid = nfs_xdrneg1; else sp->sa_gid = txdr_unsigned(vap->va_gid); sp->sa_size = txdr_unsigned(vap->va_size); txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); #ifndef NFS_V2_ONLY } #endif nfsm_request(np, NFSPROC_SETATTR, l, cred); #ifndef NFS_V2_ONLY if (v3) { nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, false); } else #endif nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); nfsm_reqdone; return (error); } /* * nfs lookup call, one step at a time... * First look in cache * If not found, do the rpc. */ int nfs_lookup(void *v) { struct vop_lookup_v2_args /* { struct vnodeop_desc *a_desc; struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; } */ *ap = v; struct componentname *cnp = ap->a_cnp; struct vnode *dvp = ap->a_dvp; struct vnode **vpp = ap->a_vpp; int flags; struct vnode *newvp; u_int32_t *tl; char *cp; int32_t t1, t2; char *bpos, *dpos, *cp2; struct mbuf *mreq, *mrep, *md, *mb; long len; nfsfh_t *fhp; struct nfsnode *np; int cachefound; int error = 0, attrflag, fhsize; const int v3 = NFS_ISV3(dvp); flags = cnp->cn_flags; *vpp = NULLVP; newvp = NULLVP; if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) return (EROFS); if (dvp->v_type != VDIR) return (ENOTDIR); /* * RFC1813(nfsv3) 3.2 says clients should handle "." by themselves. */ if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); if (error) return error; if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) return EISDIR; vref(dvp); *vpp = dvp; return 0; } np = VTONFS(dvp); /* * Before performing an RPC, check the name cache to see if * the directory/name pair we are looking for is known already. * If the directory/name pair is found in the name cache, * we have to ensure the directory has not changed from * the time the cache entry has been created. If it has, * the cache entry has to be ignored. */ cachefound = cache_lookup_raw(dvp, cnp->cn_nameptr, cnp->cn_namelen, cnp->cn_flags, NULL, vpp); KASSERT(dvp != *vpp); KASSERT((cnp->cn_flags & ISWHITEOUT) == 0); if (cachefound) { struct vattr vattr; error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred); if (error != 0) { if (*vpp != NULLVP) vrele(*vpp); *vpp = NULLVP; return error; } if (VOP_GETATTR(dvp, &vattr, cnp->cn_cred) || timespeccmp(&vattr.va_mtime, &VTONFS(dvp)->n_nctime, !=)) { if (*vpp != NULLVP) { vrele(*vpp); *vpp = NULLVP; } cache_purge1(dvp, NULL, 0, PURGE_CHILDREN); timespecclear(&np->n_nctime); goto dorpc; } if (*vpp == NULLVP) { /* namecache gave us a negative result */ error = ENOENT; goto noentry; } /* * investigate the vnode returned by cache_lookup_raw. * if it isn't appropriate, do an rpc. */ newvp = *vpp; if ((flags & ISDOTDOT) != 0) { VOP_UNLOCK(dvp); } error = vn_lock(newvp, LK_SHARED); if ((flags & ISDOTDOT) != 0) { vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); } if (error != 0) { /* newvp has been reclaimed. */ vrele(newvp); *vpp = NULLVP; goto dorpc; } if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred) && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { nfsstats.lookupcache_hits++; KASSERT(newvp->v_type != VNON); VOP_UNLOCK(newvp); return (0); } cache_purge1(newvp, NULL, 0, PURGE_PARENTS); vput(newvp); *vpp = NULLVP; } dorpc: #if 0 /* * because nfsv3 has the same CREATE semantics as ours, * we don't have to perform LOOKUPs beforehand. * * XXX ideally we can do the same for nfsv2 in the case of !O_EXCL. * XXX although we have no way to know if O_EXCL is requested or not. */ if (v3 && cnp->cn_nameiop == CREATE && (flags & (ISLASTCN|ISDOTDOT)) == ISLASTCN && (dvp->v_mount->mnt_flag & MNT_RDONLY) == 0) { return (EJUSTRETURN); } #endif /* 0 */ error = 0; newvp = NULLVP; nfsstats.lookupcache_misses++; nfsstats.rpccnt[NFSPROC_LOOKUP]++; len = cnp->cn_namelen; nfsm_reqhead(np, NFSPROC_LOOKUP, NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); nfsm_fhtom(np, v3); nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); nfsm_request(np, NFSPROC_LOOKUP, curlwp, cnp->cn_cred); if (error) { nfsm_postop_attr(dvp, attrflag, 0); m_freem(mrep); goto nfsmout; } nfsm_getfh(fhp, fhsize, v3); /* * Handle RENAME case... */ if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { if (NFS_CMPFH(np, fhp, fhsize)) { m_freem(mrep); return (EISDIR); } error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); if (error) { m_freem(mrep); return error; } newvp = NFSTOV(np); #ifndef NFS_V2_ONLY if (v3) { nfsm_postop_attr(newvp, attrflag, 0); nfsm_postop_attr(dvp, attrflag, 0); } else #endif nfsm_loadattr(newvp, (struct vattr *)0, 0); *vpp = newvp; m_freem(mrep); goto validate; } /* * The postop attr handling is duplicated for each if case, * because it should be done while dvp is locked (unlocking * dvp is different for each case). */ if (NFS_CMPFH(np, fhp, fhsize)) { /* * As we handle "." lookup locally, this is * a broken server. */ m_freem(mrep); return EBADRPC; } else if (flags & ISDOTDOT) { /* * ".." lookup */ VOP_UNLOCK(dvp); error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); if (error) { m_freem(mrep); return error; } newvp = NFSTOV(np); #ifndef NFS_V2_ONLY if (v3) { nfsm_postop_attr(newvp, attrflag, 0); nfsm_postop_attr(dvp, attrflag, 0); } else #endif nfsm_loadattr(newvp, (struct vattr *)0, 0); } else { /* * Other lookups. */ error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); if (error) { m_freem(mrep); return error; } newvp = NFSTOV(np); #ifndef NFS_V2_ONLY if (v3) { nfsm_postop_attr(newvp, attrflag, 0); nfsm_postop_attr(dvp, attrflag, 0); } else #endif nfsm_loadattr(newvp, (struct vattr *)0, 0); } if (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN)) { nfs_cache_enter(dvp, newvp, cnp); } *vpp = newvp; nfsm_reqdone; if (error) { /* * We get here only because of errors returned by * the RPC. Otherwise we'll have returned above * (the nfsm_* macros will jump to nfsm_reqdone * on error). */ if (error == ENOENT && cnp->cn_nameiop != CREATE) { nfs_cache_enter(dvp, NULL, cnp); } if (newvp != NULLVP) { if (newvp == dvp) { vrele(newvp); } else { vput(newvp); } } noentry: if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && (flags & ISLASTCN) && error == ENOENT) { if (dvp->v_mount->mnt_flag & MNT_RDONLY) { error = EROFS; } else { error = EJUSTRETURN; } } *vpp = NULL; return error; } validate: /* * make sure we have valid type and size. */ newvp = *vpp; if (newvp->v_type == VNON) { struct vattr vattr; /* dummy */ KASSERT(VTONFS(newvp)->n_attrstamp == 0); error = VOP_GETATTR(newvp, &vattr, cnp->cn_cred); if (error) { vput(newvp); *vpp = NULL; } } if (error) return error; if (newvp != dvp) VOP_UNLOCK(newvp); return 0; } /* * nfs read call. * Just call nfs_bioread() to do the work. */ int nfs_read(void *v) { struct vop_read_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; kauth_cred_t a_cred; } */ *ap = v; struct vnode *vp = ap->a_vp; if (vp->v_type != VREG) return EISDIR; return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); } /* * nfs readlink call */ int nfs_readlink(void *v) { struct vop_readlink_args /* { struct vnode *a_vp; struct uio *a_uio; kauth_cred_t a_cred; } */ *ap = v; struct vnode *vp = ap->a_vp; struct nfsnode *np = VTONFS(vp); if (vp->v_type != VLNK) return (EPERM); if (np->n_rcred != NULL) { kauth_cred_free(np->n_rcred); } np->n_rcred = ap->a_cred; kauth_cred_hold(np->n_rcred); return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); } /* * Do a readlink rpc. * Called by nfs_doio() from below the buffer cache. */ int nfs_readlinkrpc(struct vnode *vp, struct uio *uiop, kauth_cred_t cred) { u_int32_t *tl; char *cp; int32_t t1, t2; char *bpos, *dpos, *cp2; int error = 0; uint32_t len; struct mbuf *mreq, *mrep, *md, *mb; const int v3 = NFS_ISV3(vp); struct nfsnode *np = VTONFS(vp); #ifndef NFS_V2_ONLY int attrflag; #endif nfsstats.rpccnt[NFSPROC_READLINK]++; nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); nfsm_fhtom(np, v3); nfsm_request(np, NFSPROC_READLINK, curlwp, cred); #ifndef NFS_V2_ONLY if (v3) nfsm_postop_attr(vp, attrflag, 0); #endif if (!error) { #ifndef NFS_V2_ONLY if (v3) { nfsm_dissect(tl, uint32_t *, NFSX_UNSIGNED); len = fxdr_unsigned(uint32_t, *tl); if (len > NFS_MAXPATHLEN) { /* * this pathname is too long for us. */ m_freem(mrep); /* Solaris returns EINVAL. should we follow? */ error = ENAMETOOLONG; goto nfsmout; } } else #endif { nfsm_strsiz(len, NFS_MAXPATHLEN); } nfsm_mtouio(uiop, len); } nfsm_reqdone; return (error); } /* * nfs read rpc call * Ditto above */ int nfs_readrpc(struct vnode *vp, struct uio *uiop) { u_int32_t *tl; char *cp; int32_t t1, t2; char *bpos, *dpos, *cp2; struct mbuf *mreq, *mrep, *md, *mb; struct nfsmount *nmp; int error = 0, len, retlen, tsiz, eof __unused, byte_count; const int v3 = NFS_ISV3(vp); struct nfsnode *np = VTONFS(vp); #ifndef NFS_V2_ONLY int attrflag; #endif #ifndef nolint eof = 0; #endif nmp = VFSTONFS(vp->v_mount); tsiz = uiop->uio_resid; if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) return (EFBIG); iostat_busy(nmp->nm_stats); byte_count = 0; /* count bytes actually transferred */ while (tsiz > 0) { nfsstats.rpccnt[NFSPROC_READ]++; len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); nfsm_fhtom(np, v3); nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); #ifndef NFS_V2_ONLY if (v3) { txdr_hyper(uiop->uio_offset, tl); *(tl + 2) = txdr_unsigned(len); } else #endif { *tl++ = txdr_unsigned(uiop->uio_offset); *tl++ = txdr_unsigned(len); *tl = 0; } nfsm_request(np, NFSPROC_READ, curlwp, np->n_rcred); #ifndef NFS_V2_ONLY if (v3) { nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); if (error) { m_freem(mrep); goto nfsmout; } nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); eof = fxdr_unsigned(int, *(tl + 1)); } else #endif nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); nfsm_strsiz(retlen, nmp->nm_rsize); nfsm_mtouio(uiop, retlen); m_freem(mrep); tsiz -= retlen; byte_count += retlen; #ifndef NFS_V2_ONLY if (v3) { if (eof || retlen == 0) tsiz = 0; } else #endif if (retlen < len) tsiz = 0; } nfsmout: iostat_unbusy(nmp->nm_stats, byte_count, 1); return (error); } struct nfs_writerpc_context { kmutex_t nwc_lock; kcondvar_t nwc_cv; int nwc_mbufcount; }; /* * free mbuf used to refer protected pages while write rpc call. * called at splvm. */ static void nfs_writerpc_extfree(struct mbuf *m, void *tbuf, size_t size, void *arg) { struct nfs_writerpc_context *ctx = arg; KASSERT(m != NULL); KASSERT(ctx != NULL); pool_cache_put(mb_cache, m); mutex_enter(&ctx->nwc_lock); if (--ctx->nwc_mbufcount == 0) { cv_signal(&ctx->nwc_cv); } mutex_exit(&ctx->nwc_lock); } /* * nfs write call */ int nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, bool pageprotected, bool *stalewriteverfp) { u_int32_t *tl; char *cp; int32_t t1, t2; char *bpos, *dpos; struct mbuf *mreq, *mrep, *md, *mb; struct nfsmount *nmp = VFSTONFS(vp->v_mount); int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR; const int v3 = NFS_ISV3(vp); int committed = NFSV3WRITE_FILESYNC; struct nfsnode *np = VTONFS(vp); struct nfs_writerpc_context ctx; int byte_count; size_t origresid; #ifndef NFS_V2_ONLY char *cp2; int rlen, commit; #endif if (vp->v_mount->mnt_flag & MNT_RDONLY) { panic("writerpc readonly vp %p", vp); } #ifdef DIAGNOSTIC if (uiop->uio_iovcnt != 1) panic("nfs: writerpc iovcnt > 1"); #endif tsiz = uiop->uio_resid; if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) return EFBIG; mutex_init(&ctx.nwc_lock, MUTEX_DRIVER, IPL_VM); cv_init(&ctx.nwc_cv, "nfsmblk"); ctx.nwc_mbufcount = 1; retry: origresid = uiop->uio_resid; KASSERT(origresid == uiop->uio_iov->iov_len); iostat_busy(nmp->nm_stats); byte_count = 0; /* count of bytes actually written */ while (tsiz > 0) { uint32_t datalen; /* data bytes need to be allocated in mbuf */ size_t backup; bool stalewriteverf = false; nfsstats.rpccnt[NFSPROC_WRITE]++; len = uimin(tsiz, nmp->nm_wsize); datalen = pageprotected ? 0 : nfsm_rndup(len); nfsm_reqhead(np, NFSPROC_WRITE, NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); nfsm_fhtom(np, v3); #ifndef NFS_V2_ONLY if (v3) { nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); txdr_hyper(uiop->uio_offset, tl); tl += 2; *tl++ = txdr_unsigned(len); *tl++ = txdr_unsigned(*iomode); *tl = txdr_unsigned(len); } else #endif { u_int32_t x; nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); /* Set both "begin" and "current" to non-garbage. */ x = txdr_unsigned((u_int32_t)uiop->uio_offset); *tl++ = x; /* "begin offset" */ *tl++ = x; /* "current offset" */ x = txdr_unsigned(len); *tl++ = x; /* total to this offset */ *tl = x; /* size of this write */ } if (pageprotected) { /* * since we know pages can't be modified during i/o, * no need to copy them for us. */ struct mbuf *m; struct iovec *iovp = uiop->uio_iov; m = m_get(M_WAIT, MT_DATA); MCLAIM(m, &nfs_mowner); MEXTADD(m, iovp->iov_base, len, M_MBUF, nfs_writerpc_extfree, &ctx); m->m_flags |= M_EXT_ROMAP; m->m_len = len; mb->m_next = m; /* * no need to maintain mb and bpos here * because no one care them later. */ #if 0 mb = m; bpos = mtod(void *, mb) + mb->m_len; #endif UIO_ADVANCE(uiop, len); uiop->uio_offset += len; mutex_enter(&ctx.nwc_lock); ctx.nwc_mbufcount++; mutex_exit(&ctx.nwc_lock); nfs_zeropad(mb, 0, nfsm_padlen(len)); } else { nfsm_uiotom(uiop, len); } nfsm_request(np, NFSPROC_WRITE, curlwp, np->n_wcred); #ifndef NFS_V2_ONLY if (v3) { wccflag = NFSV3_WCCCHK; nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, !error); if (!error) { nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED + NFSX_V3WRITEVERF); rlen = fxdr_unsigned(int, *tl++); if (rlen == 0) { error = NFSERR_IO; m_freem(mrep); break; } else if (rlen < len) { backup = len - rlen; UIO_ADVANCE(uiop, -backup); uiop->uio_offset -= backup; len = rlen; } commit = fxdr_unsigned(int, *tl++); /* * Return the lowest commitment level * obtained by any of the RPCs. */ if (committed == NFSV3WRITE_FILESYNC) committed = commit; else if (committed == NFSV3WRITE_DATASYNC && commit == NFSV3WRITE_UNSTABLE) committed = commit; mutex_enter(&nmp->nm_lock); if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); nmp->nm_iflag |= NFSMNT_HASWRITEVERF; } else if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || memcmp(tl, nmp->nm_writeverf, NFSX_V3WRITEVERF)) { memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); /* * note NFSMNT_STALEWRITEVERF * if we're the first thread to * notice it. */ if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) == 0) { stalewriteverf = true; nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; } } mutex_exit(&nmp->nm_lock); } } else #endif nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); if (wccflag) VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime; m_freem(mrep); if (error) break; tsiz -= len; byte_count += len; if (stalewriteverf) { *stalewriteverfp = true; stalewriteverf = false; if (committed == NFSV3WRITE_UNSTABLE && len != origresid) { /* * if our write requests weren't atomic but * unstable, datas in previous iterations * might have already been lost now. * then, we should resend them to nfsd. */ backup = origresid - tsiz; UIO_ADVANCE(uiop, -backup); uiop->uio_offset -= backup; tsiz = origresid; goto retry; } } } nfsmout: iostat_unbusy(nmp->nm_stats, byte_count, 0); if (pageprotected) { /* * wait until mbufs go away. * retransmitted mbufs can survive longer than rpc requests * themselves. */ mutex_enter(&ctx.nwc_lock); ctx.nwc_mbufcount--; while (ctx.nwc_mbufcount > 0) { cv_wait(&ctx.nwc_cv, &ctx.nwc_lock); } mutex_exit(&ctx.nwc_lock); } mutex_destroy(&ctx.nwc_lock); cv_destroy(&ctx.nwc_cv); *iomode = committed; if (error) uiop->uio_resid = tsiz; return (error); } /* * nfs mknod rpc * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the * mode set to specify the file type and the size field for rdev. */ int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, struct vattr *vap) { struct nfsv2_sattr *sp; u_int32_t *tl; char *cp; int32_t t1, t2; struct vnode *newvp = (struct vnode *)0; struct nfsnode *dnp, *np; char *cp2; char *bpos, *dpos; int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; struct mbuf *mreq, *mrep, *md, *mb; u_int32_t rdev; const int v3 = NFS_ISV3(dvp); if (vap->va_type == VCHR || vap->va_type == VBLK) rdev = txdr_unsigned(vap->va_rdev); else if (vap->va_type == VFIFO || vap->va_type == VSOCK) rdev = nfs_xdrneg1; else { VOP_ABORTOP(dvp, cnp); return (EOPNOTSUPP); } nfsstats.rpccnt[NFSPROC_MKNOD]++; dnp = VTONFS(dvp); nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); nfsm_fhtom(dnp, v3); nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); #ifndef NFS_V2_ONLY if (v3) { nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); *tl++ = vtonfsv3_type(vap->va_type); nfsm_v3attrbuild(vap, false); if (vap->va_type == VCHR || vap->va_type == VBLK) { nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); *tl++ = txdr_unsigned(major(vap->va_rdev)); *tl = txdr_unsigned(minor(vap->va_rdev)); } } else #endif { nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); sp->sa_uid = nfs_xdrneg1; sp->sa_gid = nfs_xdrneg1; sp->sa_size = rdev; txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); } nfsm_request(dnp, NFSPROC_MKNOD, curlwp, cnp->cn_cred); if (!error) { nfsm_mtofh(dvp, newvp, v3, gotvp); if (!gotvp) { error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, cnp->cn_cred, curlwp, &np); if (!error) newvp = NFSTOV(np); } } #ifndef NFS_V2_ONLY if (v3) nfsm_wcc_data(dvp, wccflag, 0, !error); #endif nfsm_reqdone; if (error) { if (newvp) vput(newvp); } else { nfs_cache_enter(dvp, newvp, cnp); *vpp = newvp; VOP_UNLOCK(newvp); } VTONFS(dvp)->n_flag |= NMODIFIED; if (!wccflag) NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); return (error); } /* * nfs mknod vop * just call nfs_mknodrpc() to do the work. */ /* ARGSUSED */ int nfs_mknod(void *v) { struct vop_mknod_v3_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; } */ *ap = v; struct vnode *dvp = ap->a_dvp; struct componentname *cnp = ap->a_cnp; int error; error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, ap->a_vap); if (error == 0 || error == EEXIST) cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); return (error); } /* * nfs file create call */ int nfs_create(void *v) { struct vop_create_v3_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; } */ *ap = v; struct vnode *dvp = ap->a_dvp; struct vattr *vap = ap->a_vap; struct componentname *cnp = ap->a_cnp; struct nfsv2_sattr *sp; u_int32_t *tl; char *cp; int32_t t1, t2; struct nfsnode *dnp, *np = (struct nfsnode *)0; struct vnode *newvp = (struct vnode *)0; char *bpos, *dpos, *cp2; int error, wccflag = NFSV3_WCCRATTR, gotvp = 0; struct mbuf *mreq, *mrep, *md, *mb; const int v3 = NFS_ISV3(dvp); u_int32_t excl_mode = NFSV3CREATE_UNCHECKED; /* * Oops, not for me.. */ if (vap->va_type == VSOCK) return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); KASSERT(vap->va_type == VREG); #ifdef VA_EXCLUSIVE if (vap->va_vaflags & VA_EXCLUSIVE) { excl_mode = NFSV3CREATE_EXCLUSIVE; } #endif again: error = 0; nfsstats.rpccnt[NFSPROC_CREATE]++; dnp = VTONFS(dvp); nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); nfsm_fhtom(dnp, v3); nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); #ifndef NFS_V2_ONLY if (v3) { nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); if (excl_mode == NFSV3CREATE_EXCLUSIVE) { *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); *tl++ = cprng_fast32(); *tl = cprng_fast32(); } else { *tl = txdr_unsigned(excl_mode); nfsm_v3attrbuild(vap, false); } } else #endif { nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); sp->sa_uid = nfs_xdrneg1; sp->sa_gid = nfs_xdrneg1; sp->sa_size = 0; txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); } nfsm_request(dnp, NFSPROC_CREATE, curlwp, cnp->cn_cred); if (!error) { nfsm_mtofh(dvp, newvp, v3, gotvp); if (!gotvp) { error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, cnp->cn_cred, curlwp, &np); if (!error) newvp = NFSTOV(np); } } #ifndef NFS_V2_ONLY if (v3) nfsm_wcc_data(dvp, wccflag, 0, !error); #endif nfsm_reqdone; if (error) { /* * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. */ if (v3 && error == ENOTSUP) { if (excl_mode == NFSV3CREATE_EXCLUSIVE) { excl_mode = NFSV3CREATE_GUARDED; goto again; } else if (excl_mode == NFSV3CREATE_GUARDED) { excl_mode = NFSV3CREATE_UNCHECKED; goto again; } } } else if (v3 && (excl_mode == NFSV3CREATE_EXCLUSIVE)) { struct timespec ts; getnanotime(&ts); /* * make sure that we'll update timestamps as * most server implementations use them to store * the create verifier. * * XXX it's better to use TOSERVER always. */ if (vap->va_atime.tv_sec == VNOVAL) vap->va_atime = ts; if (vap->va_mtime.tv_sec == VNOVAL) vap->va_mtime = ts; error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, curlwp); } if (error == 0) { if (cnp->cn_flags & MAKEENTRY) nfs_cache_enter(dvp, newvp, cnp); else cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); *ap->a_vpp = newvp; VOP_UNLOCK(newvp); } else { if (newvp) vput(newvp); if (error == EEXIST) cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); } VTONFS(dvp)->n_flag |= NMODIFIED; if (!wccflag) NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); return (error); } /* * nfs file remove call * To try and make nfs semantics closer to ufs semantics, a file that has * other processes using the vnode is renamed instead of removed and then * removed later on the last close. * - If vrefcnt(vp) > 1 * If a rename is not already in the works * call nfs_sillyrename() to set it up * else * do the remove rpc */ int nfs_remove(void *v) { struct vop_remove_v3_args /* { struct vnodeop_desc *a_desc; struct vnode * a_dvp; struct vnode * a_vp; struct componentname * a_cnp; nlink_t ctx_vp_new_nlink; } */ *ap = v; struct vnode *vp = ap->a_vp; struct vnode *dvp = ap->a_dvp; struct componentname *cnp = ap->a_cnp; struct nfsnode *np = VTONFS(vp); int error = 0; struct vattr vattr; #ifndef DIAGNOSTIC if (vrefcnt(vp) < 1) panic("nfs_remove: bad vrefcnt(vp)"); #endif if (vp->v_type == VDIR) error = EPERM; else if (vrefcnt(vp) == 1 || (np->n_sillyrename && VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 && vattr.va_nlink > 1)) { /* * Purge the name cache so that the chance of a lookup for * the name succeeding while the remove is in progress is * minimized. Without node locking it can still happen, such * that an I/O op returns ESTALE, but since you get this if * another host removes the file.. */ cache_purge(vp); /* * throw away biocache buffers, mainly to avoid * unnecessary delayed writes later. */ error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, curlwp, 1); /* Do the rpc */ if (error != EINTR) error = nfs_removerpc(dvp, cnp->cn_nameptr, cnp->cn_namelen, cnp->cn_cred, curlwp); } else if (!np->n_sillyrename) error = nfs_sillyrename(dvp, vp, cnp, false); if (error == 0 && nfs_getattrcache(vp, &vattr) == 0) { ap->ctx_vp_new_nlink = vattr.va_nlink - 1; if (vattr.va_nlink == 1) np->n_flag |= NREMOVED; } NFS_INVALIDATE_ATTRCACHE(np); if (dvp == vp) vrele(vp); else vput(vp); return (error); } /* * nfs file remove rpc called from nfs_inactive */ int nfs_removeit(struct sillyrename *sp) { return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, (struct lwp *)0)); } /* * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). */ int nfs_removerpc(struct vnode *dvp, const char *name, int namelen, kauth_cred_t cred, struct lwp *l) { u_int32_t *tl; char *cp; #ifndef NFS_V2_ONLY int32_t t1; char *cp2; #endif int32_t t2; char *bpos, *dpos; int error = 0, wccflag = NFSV3_WCCRATTR; struct mbuf *mreq, *mrep, *md, *mb; const int v3 = NFS_ISV3(dvp); int rexmit = 0; struct nfsnode *dnp = VTONFS(dvp); nfsstats.rpccnt[NFSPROC_REMOVE]++; nfsm_reqhead(dnp, NFSPROC_REMOVE, NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); nfsm_fhtom(dnp, v3); nfsm_strtom(name, namelen, NFS_MAXNAMLEN); nfsm_request1(dnp, NFSPROC_REMOVE, l, cred, &rexmit); #ifndef NFS_V2_ONLY if (v3) nfsm_wcc_data(dvp, wccflag, 0, !error); #endif nfsm_reqdone; VTONFS(dvp)->n_flag |= NMODIFIED; if (!wccflag) NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); /* * Kludge City: If the first reply to the remove rpc is lost.. * the reply to the retransmitted request will be ENOENT * since the file was in fact removed * Therefore, we cheat and return success. */ if (rexmit && error == ENOENT) error = 0; return (error); } /* * nfs file rename call */ int nfs_rename(void *v) { struct vop_rename_args /* { struct vnode *a_fdvp; struct vnode *a_fvp; struct componentname *a_fcnp; struct vnode *a_tdvp; struct vnode *a_tvp; struct componentname *a_tcnp; } */ *ap = v; struct vnode *fvp = ap->a_fvp; struct vnode *tvp = ap->a_tvp; struct vnode *fdvp = ap->a_fdvp; struct vnode *tdvp = ap->a_tdvp; struct componentname *tcnp = ap->a_tcnp; struct componentname *fcnp = ap->a_fcnp; int error; /* Check for cross-device rename */ if ((fvp->v_mount != tdvp->v_mount) || (tvp && (fvp->v_mount != tvp->v_mount))) { error = EXDEV; goto out; } /* * If the tvp exists and is in use, sillyrename it before doing the * rename of the new file over it. * * Have sillyrename use link instead of rename if possible, * so that we don't lose the file if the rename fails, and so * that there's no window when the "to" file doesn't exist. */ if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename && tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp, true)) { VN_KNOTE(tvp, NOTE_DELETE); vput(tvp); tvp = NULL; } error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, curlwp); VN_KNOTE(fdvp, NOTE_WRITE); VN_KNOTE(tdvp, NOTE_WRITE); if (error == 0 || error == EEXIST) { if (fvp->v_type == VDIR) cache_purge(fvp); else cache_purge1(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 0); if (tvp != NULL && tvp->v_type == VDIR) cache_purge(tvp); else cache_purge1(tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, 0); } out: if (tdvp == tvp) vrele(tdvp); else vput(tdvp); if (tvp) vput(tvp); vrele(fdvp); vrele(fvp); return (error); } /* * nfs file rename rpc called from nfs_remove() above */ int nfs_renameit(struct vnode *sdvp, struct componentname *scnp, struct sillyrename *sp) { return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, curlwp)); } /* * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). */ int nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen, struct vnode *tdvp, const char *tnameptr, int tnamelen, kauth_cred_t cred, struct lwp *l) { u_int32_t *tl; char *cp; #ifndef NFS_V2_ONLY int32_t t1; char *cp2; #endif int32_t t2; char *bpos, *dpos; int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; struct mbuf *mreq, *mrep, *md, *mb; const int v3 = NFS_ISV3(fdvp); int rexmit = 0; struct nfsnode *fdnp = VTONFS(fdvp); nfsstats.rpccnt[NFSPROC_RENAME]++; nfsm_reqhead(fdnp, NFSPROC_RENAME, (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + nfsm_rndup(tnamelen)); nfsm_fhtom(fdnp, v3); nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); nfsm_fhtom(VTONFS(tdvp), v3); nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); nfsm_request1(fdnp, NFSPROC_RENAME, l, cred, &rexmit); #ifndef NFS_V2_ONLY if (v3) { nfsm_wcc_data(fdvp, fwccflag, 0, !error); nfsm_wcc_data(tdvp, twccflag, 0, !error); } #endif nfsm_reqdone; VTONFS(fdvp)->n_flag |= NMODIFIED; VTONFS(tdvp)->n_flag |= NMODIFIED; if (!fwccflag) NFS_INVALIDATE_ATTRCACHE(VTONFS(fdvp)); if (!twccflag) NFS_INVALIDATE_ATTRCACHE(VTONFS(tdvp)); /* * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. */ if (rexmit && error == ENOENT) error = 0; return (error); } /* * NFS link RPC, called from nfs_link. * Assumes dvp and vp locked, and leaves them that way. */ static int nfs_linkrpc(struct vnode *dvp, struct vnode *vp, const char *name, size_t namelen, kauth_cred_t cred, struct lwp *l) { u_int32_t *tl; char *cp; #ifndef NFS_V2_ONLY int32_t t1; char *cp2; #endif int32_t t2; char *bpos, *dpos; int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; struct mbuf *mreq, *mrep, *md, *mb; const int v3 = NFS_ISV3(dvp); int rexmit = 0; struct nfsnode *np = VTONFS(vp); nfsstats.rpccnt[NFSPROC_LINK]++; nfsm_reqhead(np, NFSPROC_LINK, NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(namelen)); nfsm_fhtom(np, v3); nfsm_fhtom(VTONFS(dvp), v3); nfsm_strtom(name, namelen, NFS_MAXNAMLEN); nfsm_request1(np, NFSPROC_LINK, l, cred, &rexmit); #ifndef NFS_V2_ONLY if (v3) { nfsm_postop_attr(vp, attrflag, 0); nfsm_wcc_data(dvp, wccflag, 0, !error); } #endif nfsm_reqdone; VTONFS(dvp)->n_flag |= NMODIFIED; if (!attrflag) NFS_INVALIDATE_ATTRCACHE(VTONFS(vp)); if (!wccflag) NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); /* * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. */ if (rexmit && error == EEXIST) error = 0; return error; } /* * nfs hard link create call */ int nfs_link(void *v) { struct vop_link_v2_args /* { struct vnode *a_dvp; struct vnode *a_vp; struct componentname *a_cnp; } */ *ap = v; struct vnode *vp = ap->a_vp; struct vnode *dvp = ap->a_dvp; struct componentname *cnp = ap->a_cnp; int error = 0, abrt = 1; error = vn_lock(vp, LK_EXCLUSIVE); if (error != 0) goto out; error = kauth_authorize_vnode(cnp->cn_cred, KAUTH_VNODE_ADD_LINK, vp, dvp, 0); if (error) goto out1; abrt = 0; /* * Push all writes to the server, so that the attribute cache * doesn't get "out of sync" with the server. * XXX There should be a better way! */ VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0); error = nfs_linkrpc(dvp, vp, cnp->cn_nameptr, cnp->cn_namelen, cnp->cn_cred, curlwp); if (error == 0) { cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); } out1: VOP_UNLOCK(vp); out: if (abrt) VOP_ABORTOP(dvp, cnp); return (error); } /* * nfs symbolic link create call */ int nfs_symlink(void *v) { struct vop_symlink_v3_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; char *a_target; } */ *ap = v; struct vnode *dvp = ap->a_dvp; struct vattr *vap = ap->a_vap; struct componentname *cnp = ap->a_cnp; struct nfsv2_sattr *sp; u_int32_t *tl; char *cp; int32_t t1, t2; char *bpos, *dpos, *cp2; int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; struct mbuf *mreq, *mrep, *md, *mb; struct vnode *newvp = (struct vnode *)0; const int v3 = NFS_ISV3(dvp); int rexmit = 0; struct nfsnode *dnp = VTONFS(dvp); *ap->a_vpp = NULL; nfsstats.rpccnt[NFSPROC_SYMLINK]++; slen = strlen(ap->a_target); nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); nfsm_fhtom(dnp, v3); nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); #ifndef NFS_V2_ONlY if (v3) nfsm_v3attrbuild(vap, false); #endif nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); #ifndef NFS_V2_ONlY if (!v3) { nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); sp->sa_uid = nfs_xdrneg1; sp->sa_gid = nfs_xdrneg1; sp->sa_size = nfs_xdrneg1; txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); } #endif nfsm_request1(dnp, NFSPROC_SYMLINK, curlwp, cnp->cn_cred, &rexmit); #ifndef NFS_V2_ONlY if (v3) { if (!error) nfsm_mtofh(dvp, newvp, v3, gotvp); nfsm_wcc_data(dvp, wccflag, 0, !error); } #endif nfsm_reqdone; /* * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. */ if (rexmit && error == EEXIST) error = 0; if (error == 0 || error == EEXIST) cache_purge1(dvp, cnp->cn_nameptr, cnp->cn_namelen, 0); if (error == 0 && newvp == NULL) { struct nfsnode *np = NULL; error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, cnp->cn_cred, curlwp, &np); if (error == 0) newvp = NFSTOV(np); } if (error) { if (newvp != NULL) vput(newvp); } else { *ap->a_vpp = newvp; VOP_UNLOCK(newvp); } VTONFS(dvp)->n_flag |= NMODIFIED; if (!wccflag) NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); return (error); } /* * nfs make dir call */ int nfs_mkdir(void *v) { struct vop_mkdir_v3_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; } */ *ap = v; struct vnode *dvp = ap->a_dvp; struct vattr *vap = ap->a_vap; struct componentname *cnp = ap->a_cnp; struct nfsv2_sattr *sp; u_int32_t *tl; char *cp; int32_t t1, t2; int len; struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; struct vnode *newvp = (struct vnode *)0; char *bpos, *dpos, *cp2; int error = 0, wccflag = NFSV3_WCCRATTR; int gotvp = 0; int rexmit = 0; struct mbuf *mreq, *mrep, *md, *mb; const int v3 = NFS_ISV3(dvp); len = cnp->cn_namelen; nfsstats.rpccnt[NFSPROC_MKDIR]++; nfsm_reqhead(dnp, NFSPROC_MKDIR, NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); nfsm_fhtom(dnp, v3); nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); #ifndef NFS_V2_ONLY if (v3) { nfsm_v3attrbuild(vap, false); } else #endif { nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); sp->sa_uid = nfs_xdrneg1; sp->sa_gid = nfs_xdrneg1; sp->sa_size = nfs_xdrneg1; txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); } nfsm_request1(dnp, NFSPROC_MKDIR, curlwp, cnp->cn_cred, &rexmit); if (!error) nfsm_mtofh(dvp, newvp, v3, gotvp); if (v3) nfsm_wcc_data(dvp, wccflag, 0, !error); nfsm_reqdone; VTONFS(dvp)->n_flag |= NMODIFIED; if (!wccflag) NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); /* * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry * if we can succeed in looking up the directory. */ if ((rexmit && error == EEXIST) || (!error && !gotvp)) { if (newvp) { vput(newvp); newvp = (struct vnode *)0; } error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, curlwp, &np); if (!error) { newvp = NFSTOV(np); if (newvp->v_type != VDIR || newvp == dvp) error = EEXIST; } } if (error) { if (newvp) { if (dvp != newvp) vput(newvp); else vrele(newvp); } } else { nfs_cache_enter(dvp, newvp, cnp); *ap->a_vpp = newvp; VOP_UNLOCK(newvp); } return (error); } /* * nfs remove directory call */ int nfs_rmdir(void *v) { struct vop_rmdir_v2_args /* { struct vnode *a_dvp; struct vnode *a_vp; struct componentname *a_cnp; } */ *ap = v; struct vnode *vp = ap->a_vp; struct vnode *dvp = ap->a_dvp; struct componentname *cnp = ap->a_cnp; u_int32_t *tl; char *cp; #ifndef NFS_V2_ONLY int32_t t1; char *cp2; #endif int32_t t2; char *bpos, *dpos; int error = 0, wccflag = NFSV3_WCCRATTR; int rexmit = 0; struct mbuf *mreq, *mrep, *md, *mb; const int v3 = NFS_ISV3(dvp); struct nfsnode *dnp; if (dvp == vp) { vrele(vp); return (EINVAL); } nfsstats.rpccnt[NFSPROC_RMDIR]++; dnp = VTONFS(dvp); nfsm_reqhead(dnp, NFSPROC_RMDIR, NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); nfsm_fhtom(dnp, v3); nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); nfsm_request1(dnp, NFSPROC_RMDIR, curlwp, cnp->cn_cred, &rexmit); #ifndef NFS_V2_ONLY if (v3) nfsm_wcc_data(dvp, wccflag, 0, !error); #endif nfsm_reqdone; VTONFS(dvp)->n_flag |= NMODIFIED; if (!wccflag) NFS_INVALIDATE_ATTRCACHE(VTONFS(dvp)); cache_purge(vp); vput(vp); /* * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. */ if (rexmit && error == ENOENT) error = 0; return (error); } /* * nfs readdir call */ int nfs_readdir(void *v) { struct vop_readdir_args /* { struct vnode *a_vp; struct uio *a_uio; kauth_cred_t a_cred; int *a_eofflag; off_t **a_cookies; int *a_ncookies; } */ *ap = v; struct vnode *vp = ap->a_vp; struct uio *uio = ap->a_uio; struct nfsmount *nmp = VFSTONFS(vp->v_mount); char *base = uio->uio_iov->iov_base; int tresid, error; size_t count, lost; struct dirent *dp; off_t *cookies = NULL; int ncookies = 0, nc; if (vp->v_type != VDIR) return (EPERM); lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); count = uio->uio_resid - lost; if (count <= 0) return (EINVAL); /* * Call nfs_bioread() to do the real work. */ tresid = uio->uio_resid = count; error = nfs_bioread(vp, uio, 0, ap->a_cred, ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); if (!error && ap->a_cookies) { ncookies = count / 16; cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); *ap->a_cookies = cookies; } if (!error && uio->uio_resid == tresid) { uio->uio_resid += lost; nfsstats.direofcache_misses++; if (ap->a_cookies) *ap->a_ncookies = 0; *ap->a_eofflag = 1; return (0); } if (!error && ap->a_cookies) { /* * Only the NFS server and emulations use cookies, and they * load the directory block into system space, so we can * just look at it directly. */ if (!VMSPACE_IS_KERNEL_P(uio->uio_vmspace) || uio->uio_iovcnt != 1) panic("nfs_readdir: lost in space"); for (nc = 0; ncookies-- && base < (char *)uio->uio_iov->iov_base; nc++){ dp = (struct dirent *) base; if (dp->d_reclen == 0) break; if (nmp->nm_flag & NFSMNT_XLATECOOKIE) *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); else *(cookies++) = NFS_GETCOOKIE(dp); base += dp->d_reclen; } uio->uio_resid += ((char *)uio->uio_iov->iov_base - base); uio->uio_iov->iov_len += ((char *)uio->uio_iov->iov_base - base); uio->uio_iov->iov_base = base; *ap->a_ncookies = nc; } uio->uio_resid += lost; *ap->a_eofflag = 0; return (error); } /* * Readdir rpc call. * Called from below the buffer cache by nfs_doio(). */ int nfs_readdirrpc(struct vnode *vp, struct uio *uiop, kauth_cred_t cred) { int len, left; struct dirent *dp = NULL; u_int32_t *tl; char *cp; int32_t t1, t2; char *bpos, *dpos, *cp2; struct mbuf *mreq, *mrep, *md, *mb; struct nfsmount *nmp = VFSTONFS(vp->v_mount); struct nfsnode *dnp = VTONFS(vp); u_quad_t fileno; int error = 0, more_dirs = 1, blksiz = 0, bigenough = 1; #ifndef NFS_V2_ONLY int attrflag; #endif int nrpcs = 0, reclen; const int v3 = NFS_ISV3(vp); #ifdef DIAGNOSTIC /* * Should be called from buffer cache, so only amount of * NFS_DIRBLKSIZ will be requested. */ if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) panic("nfs readdirrpc bad uio"); #endif /* * Loop around doing readdir rpc's of size nm_readdirsize * truncated to a multiple of NFS_DIRFRAGSIZ. * The stopping criteria is EOF or buffer full. */ while (more_dirs && bigenough) { /* * Heuristic: don't bother to do another RPC to further * fill up this block if there is not much room left. (< 50% * of the readdir RPC size). This wastes some buffer space * but can save up to 50% in RPC calls. */ if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { bigenough = 0; break; } nfsstats.rpccnt[NFSPROC_READDIR]++; nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + NFSX_READDIR(v3)); nfsm_fhtom(dnp, v3); #ifndef NFS_V2_ONLY if (v3) { nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { txdr_swapcookie3(uiop->uio_offset, tl); } else { txdr_cookie3(uiop->uio_offset, tl); } tl += 2; if (uiop->uio_offset == 0) { *tl++ = 0; *tl++ = 0; } else { *tl++ = dnp->n_cookieverf.nfsuquad[0]; *tl++ = dnp->n_cookieverf.nfsuquad[1]; } } else #endif { nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); *tl++ = txdr_unsigned(uiop->uio_offset); } *tl = txdr_unsigned(nmp->nm_readdirsize); nfsm_request(dnp, NFSPROC_READDIR, curlwp, cred); nrpcs++; #ifndef NFS_V2_ONLY if (v3) { nfsm_postop_attr(vp, attrflag, 0); if (!error) { nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); dnp->n_cookieverf.nfsuquad[0] = *tl++; dnp->n_cookieverf.nfsuquad[1] = *tl; } else { m_freem(mrep); goto nfsmout; } } #endif nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); more_dirs = fxdr_unsigned(int, *tl); /* loop thru the dir entries, doctoring them to 4bsd form */ while (more_dirs && bigenough) { #ifndef NFS_V2_ONLY if (v3) { nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); fileno = fxdr_hyper(tl); len = fxdr_unsigned(int, *(tl + 2)); } else #endif { nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); fileno = fxdr_unsigned(u_quad_t, *tl++); len = fxdr_unsigned(int, *tl); } if (len <= 0 || len > NFS_MAXNAMLEN) { error = EBADRPC; m_freem(mrep); goto nfsmout; } /* for cookie stashing */ reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); left = NFS_DIRFRAGSIZ - blksiz; if (reclen > left) { memset(uiop->uio_iov->iov_base, 0, left); dp->d_reclen += left; UIO_ADVANCE(uiop, left); blksiz = 0; NFS_STASHCOOKIE(dp, uiop->uio_offset); } if (reclen > uiop->uio_resid) bigenough = 0; if (bigenough) { int tlen; dp = (struct dirent *)uiop->uio_iov->iov_base; dp->d_fileno = fileno; dp->d_namlen = len; dp->d_reclen = reclen; dp->d_type = DT_UNKNOWN; blksiz += reclen; if (blksiz == NFS_DIRFRAGSIZ) blksiz = 0; UIO_ADVANCE(uiop, DIRHDSIZ); nfsm_mtouio(uiop, len); tlen = reclen - (DIRHDSIZ + len); (void)memset(uiop->uio_iov->iov_base, 0, tlen); UIO_ADVANCE(uiop, tlen); } else nfsm_adv(nfsm_rndup(len)); #ifndef NFS_V2_ONLY if (v3) { nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); } else #endif { nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); } if (bigenough) { #ifndef NFS_V2_ONLY if (v3) { if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) uiop->uio_offset = fxdr_swapcookie3(tl); else uiop->uio_offset = fxdr_cookie3(tl); } else #endif { uiop->uio_offset = fxdr_unsigned(off_t, *tl); } NFS_STASHCOOKIE(dp, uiop->uio_offset); } if (v3) tl += 2; else tl++; more_dirs = fxdr_unsigned(int, *tl); } /* * If at end of rpc data, get the eof boolean */ if (!more_dirs) { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); more_dirs = (fxdr_unsigned(int, *tl) == 0); /* * kludge: if we got no entries, treat it as EOF. * some server sometimes send a reply without any * entries or EOF. * although it might mean the server has very long name, * we can't handle such entries anyway. */ if (uiop->uio_resid >= NFS_DIRBLKSIZ) more_dirs = 0; } m_freem(mrep); } /* * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ * by increasing d_reclen for the last record. */ if (blksiz > 0) { left = NFS_DIRFRAGSIZ - blksiz; memset(uiop->uio_iov->iov_base, 0, left); dp->d_reclen += left; NFS_STASHCOOKIE(dp, uiop->uio_offset); UIO_ADVANCE(uiop, left); } /* * We are now either at the end of the directory or have filled the * block. */ if (bigenough) { dnp->n_direofoffset = uiop->uio_offset; dnp->n_flag |= NEOFVALID; } nfsmout: return (error); } #ifndef NFS_V2_ONLY /* * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). */ int nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop, kauth_cred_t cred) { int len, left; struct dirent *dp = NULL; u_int32_t *tl; char *cp; int32_t t1, t2; struct vnode *newvp; char *bpos, *dpos, *cp2; struct mbuf *mreq, *mrep, *md, *mb; struct nameidata nami, *ndp = &nami; struct componentname *cnp = &ndp->ni_cnd; struct nfsmount *nmp = VFSTONFS(vp->v_mount); struct nfsnode *dnp = VTONFS(vp), *np; nfsfh_t *fhp; u_quad_t fileno; int error = 0, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; int attrflag, fhsize, nrpcs = 0, reclen; struct nfs_fattr fattr, *fp; #ifdef DIAGNOSTIC if (uiop->uio_iovcnt != 1 || uiop->uio_resid != NFS_DIRBLKSIZ) panic("nfs readdirplusrpc bad uio"); #endif ndp->ni_dvp = vp; newvp = NULLVP; /* * Loop around doing readdir rpc's of size nm_readdirsize * truncated to a multiple of NFS_DIRFRAGSIZ. * The stopping criteria is EOF or buffer full. */ while (more_dirs && bigenough) { if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { bigenough = 0; break; } nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, NFSX_FH(1) + 6 * NFSX_UNSIGNED); nfsm_fhtom(dnp, 1); nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { txdr_swapcookie3(uiop->uio_offset, tl); } else { txdr_cookie3(uiop->uio_offset, tl); } tl += 2; if (uiop->uio_offset == 0) { *tl++ = 0; *tl++ = 0; } else { *tl++ = dnp->n_cookieverf.nfsuquad[0]; *tl++ = dnp->n_cookieverf.nfsuquad[1]; } *tl++ = txdr_unsigned(nmp->nm_readdirsize); *tl = txdr_unsigned(nmp->nm_rsize); nfsm_request(dnp, NFSPROC_READDIRPLUS, curlwp, cred); nfsm_postop_attr(vp, attrflag, 0); if (error) { m_freem(mrep); goto nfsmout; } nrpcs++; nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); dnp->n_cookieverf.nfsuquad[0] = *tl++; dnp->n_cookieverf.nfsuquad[1] = *tl++; more_dirs = fxdr_unsigned(int, *tl); /* loop thru the dir entries, doctoring them to 4bsd form */ while (more_dirs && bigenough) { nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); fileno = fxdr_hyper(tl); len = fxdr_unsigned(int, *(tl + 2)); if (len <= 0 || len > NFS_MAXNAMLEN) { error = EBADRPC; m_freem(mrep); goto nfsmout; } /* for cookie stashing */ reclen = _DIRENT_RECLEN(dp, len) + 2 * sizeof(off_t); left = NFS_DIRFRAGSIZ - blksiz; if (reclen > left) { /* * DIRFRAGSIZ is aligned, no need to align * again here. */ memset(uiop->uio_iov->iov_base, 0, left); dp->d_reclen += left; UIO_ADVANCE(uiop, left); NFS_STASHCOOKIE(dp, uiop->uio_offset); blksiz = 0; } if (reclen > uiop->uio_resid) bigenough = 0; if (bigenough) { int tlen; dp = (struct dirent *)uiop->uio_iov->iov_base; dp->d_fileno = fileno; dp->d_namlen = len; dp->d_reclen = reclen; dp->d_type = DT_UNKNOWN; blksiz += reclen; if (blksiz == NFS_DIRFRAGSIZ) blksiz = 0; UIO_ADVANCE(uiop, DIRHDSIZ); nfsm_mtouio(uiop, len); tlen = reclen - (DIRHDSIZ + len); (void)memset(uiop->uio_iov->iov_base, 0, tlen); UIO_ADVANCE(uiop, tlen); cnp->cn_nameptr = dp->d_name; cnp->cn_namelen = dp->d_namlen; } else nfsm_adv(nfsm_rndup(len)); nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); if (bigenough) { if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) uiop->uio_offset = fxdr_swapcookie3(tl); else uiop->uio_offset = fxdr_cookie3(tl); NFS_STASHCOOKIE(dp, uiop->uio_offset); } tl += 2; /* * Since the attributes are before the file handle * (sigh), we must skip over the attributes and then * come back and get them. */ attrflag = fxdr_unsigned(int, *tl); if (attrflag) { nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); memcpy(&fattr, fp, NFSX_V3FATTR); nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); doit = fxdr_unsigned(int, *tl); if (doit) { nfsm_getfh(fhp, fhsize, 1); if (NFS_CMPFH(dnp, fhp, fhsize)) { vref(vp); newvp = vp; np = dnp; } else { error = nfs_nget1(vp->v_mount, fhp, fhsize, &np, LK_NOWAIT); if (!error) newvp = NFSTOV(np); } if (!error) { nfs_loadattrcache(&newvp, &fattr, 0, 0); if (bigenough) { dp->d_type = IFTODT(VTTOIF(np->n_vattr->va_type)); ndp->ni_vp = newvp; nfs_cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp); } } error = 0; } } else { /* Just skip over the file handle */ nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); i = fxdr_unsigned(int, *tl); nfsm_adv(nfsm_rndup(i)); } if (newvp != NULLVP) { if (newvp == vp) vrele(newvp); else vput(newvp); newvp = NULLVP; } nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); more_dirs = fxdr_unsigned(int, *tl); } /* * If at end of rpc data, get the eof boolean */ if (!more_dirs) { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); more_dirs = (fxdr_unsigned(int, *tl) == 0); /* * kludge: see a comment in nfs_readdirrpc. */ if (uiop->uio_resid >= NFS_DIRBLKSIZ) more_dirs = 0; } m_freem(mrep); } /* * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ * by increasing d_reclen for the last record. */ if (blksiz > 0) { left = NFS_DIRFRAGSIZ - blksiz; memset(uiop->uio_iov->iov_base, 0, left); dp->d_reclen += left; NFS_STASHCOOKIE(dp, uiop->uio_offset); UIO_ADVANCE(uiop, left); } /* * We are now either at the end of the directory or have filled the * block. */ if (bigenough) { dnp->n_direofoffset = uiop->uio_offset; dnp->n_flag |= NEOFVALID; } nfsmout: if (newvp != NULLVP) { if(newvp == vp) vrele(newvp); else vput(newvp); } return (error); } #endif /* * Silly rename. To make the NFS filesystem that is stateless look a little * more like the "ufs" a remove of an active vnode is translated to a rename * to a funny looking filename that is removed by nfs_inactive on the * nfsnode. There is the potential for another process on a different client * to create the same funny name between the nfs_lookitup() fails and the * nfs_rename() completes, but... */ int nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp, bool dolink) { struct sillyrename *sp; struct nfsnode *np; int error; pid_t pid; cache_purge(dvp); np = VTONFS(vp); #ifndef DIAGNOSTIC if (vp->v_type == VDIR) panic("nfs: sillyrename dir"); #endif sp = kmem_alloc(sizeof(*sp), KM_SLEEP); sp->s_cred = kauth_cred_dup(cnp->cn_cred); sp->s_dvp = dvp; vref(dvp); /* Fudge together a funny name */ pid = curlwp->l_proc->p_pid; memcpy(sp->s_name, ".nfsAxxxx4.4", 13); sp->s_namlen = 12; sp->s_name[8] = hexdigits[pid & 0xf]; sp->s_name[7] = hexdigits[(pid >> 4) & 0xf]; sp->s_name[6] = hexdigits[(pid >> 8) & 0xf]; sp->s_name[5] = hexdigits[(pid >> 12) & 0xf]; /* Try lookitups until we get one that isn't there */ while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, curlwp, (struct nfsnode **)0) == 0) { sp->s_name[4]++; if (sp->s_name[4] > 'z') { error = EINVAL; goto bad; } } if (dolink) { error = nfs_linkrpc(dvp, vp, sp->s_name, sp->s_namlen, sp->s_cred, curlwp); /* * nfs_request maps NFSERR_NOTSUPP to ENOTSUP. */ if (error == ENOTSUP) { error = nfs_renameit(dvp, cnp, sp); } } else { error = nfs_renameit(dvp, cnp, sp); } if (error) goto bad; error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, curlwp, &np); np->n_sillyrename = sp; return (0); bad: vrele(sp->s_dvp); kauth_cred_free(sp->s_cred); kmem_free(sp, sizeof(*sp)); return (error); } /* * Look up a file name and optionally either update the file handle or * allocate an nfsnode, depending on the value of npp. * npp == NULL --> just do the lookup * *npp == NULL --> allocate a new nfsnode and make sure attributes are * handled too * *npp != NULL --> update the file handle in the vnode */ int nfs_lookitup(struct vnode *dvp, const char *name, int len, kauth_cred_t cred, struct lwp *l, struct nfsnode **npp) { u_int32_t *tl; char *cp; int32_t t1, t2; struct vnode *newvp = (struct vnode *)0; struct nfsnode *np, *dnp = VTONFS(dvp); char *bpos, *dpos, *cp2; int error = 0, ofhlen, fhlen; #ifndef NFS_V2_ONLY int attrflag; #endif struct mbuf *mreq, *mrep, *md, *mb; nfsfh_t *ofhp, *nfhp; const int v3 = NFS_ISV3(dvp); nfsstats.rpccnt[NFSPROC_LOOKUP]++; nfsm_reqhead(dnp, NFSPROC_LOOKUP, NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); nfsm_fhtom(dnp, v3); nfsm_strtom(name, len, NFS_MAXNAMLEN); nfsm_request(dnp, NFSPROC_LOOKUP, l, cred); if (npp && !error) { nfsm_getfh(nfhp, fhlen, v3); if (*npp) { np = *npp; newvp = NFSTOV(np); ofhlen = np->n_fhsize; ofhp = kmem_alloc(ofhlen, KM_SLEEP); memcpy(ofhp, np->n_fhp, ofhlen); error = vcache_rekey_enter(newvp->v_mount, newvp, ofhp, ofhlen, nfhp, fhlen); if (error) { kmem_free(ofhp, ofhlen); m_freem(mrep); return error; } if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { kmem_free(np->n_fhp, np->n_fhsize); np->n_fhp = &np->n_fh; } #if NFS_SMALLFH < NFSX_V3FHMAX else if (np->n_fhsize <= NFS_SMALLFH && fhlen > NFS_SMALLFH) np->n_fhp = kmem_alloc(fhlen, KM_SLEEP); #endif memcpy(np->n_fhp, nfhp, fhlen); np->n_fhsize = fhlen; vcache_rekey_exit(newvp->v_mount, newvp, ofhp, ofhlen, np->n_fhp, fhlen); kmem_free(ofhp, ofhlen); } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { vref(dvp); newvp = dvp; np = dnp; } else { error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); if (error) { m_freem(mrep); return (error); } newvp = NFSTOV(np); } #ifndef NFS_V2_ONLY if (v3) { nfsm_postop_attr(newvp, attrflag, 0); if (!attrflag && *npp == NULL) { m_freem(mrep); vput(newvp); return (ENOENT); } } else #endif nfsm_loadattr(newvp, (struct vattr *)0, 0); } nfsm_reqdone; if (npp && *npp == NULL) { if (error) { if (newvp) vput(newvp); } else *npp = np; } return (error); } #ifndef NFS_V2_ONLY /* * Nfs Version 3 commit rpc */ int nfs_commit(struct vnode *vp, off_t offset, uint32_t cnt, struct lwp *l) { char *cp; u_int32_t *tl; int32_t t1, t2; struct nfsmount *nmp = VFSTONFS(vp->v_mount); char *bpos, *dpos, *cp2; int error = 0, wccflag = NFSV3_WCCRATTR; struct mbuf *mreq, *mrep, *md, *mb; struct nfsnode *np; KASSERT(NFS_ISV3(vp)); #ifdef NFS_DEBUG_COMMIT printf("commit %lu - %lu\n", (unsigned long)offset, (unsigned long)(offset + cnt)); #endif mutex_enter(&nmp->nm_lock); if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { mutex_exit(&nmp->nm_lock); return (0); } mutex_exit(&nmp->nm_lock); nfsstats.rpccnt[NFSPROC_COMMIT]++; np = VTONFS(vp); nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); nfsm_fhtom(np, 1); nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); txdr_hyper(offset, tl); tl += 2; *tl = txdr_unsigned(cnt); nfsm_request(np, NFSPROC_COMMIT, l, np->n_wcred); nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC, false); if (!error) { nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); mutex_enter(&nmp->nm_lock); if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); error = NFSERR_STALEWRITEVERF; nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; } mutex_exit(&nmp->nm_lock); } nfsm_reqdone; return (error); } #endif /* * Kludge City.. * - make nfs_bmap() essentially a no-op that does no translation * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc * (Maybe I could use the process's page mapping, but I was concerned that * Kernel Write might not be enabled and also figured copyout() would do * a lot more work than memcpy() and also it currently happens in the * context of the swapper process (2). */ int nfs_bmap(void *v) { struct vop_bmap_args /* { struct vnode *a_vp; daddr_t a_bn; struct vnode **a_vpp; daddr_t *a_bnp; int *a_runp; } */ *ap = v; struct vnode *vp = ap->a_vp; int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; if (ap->a_vpp != NULL) *ap->a_vpp = vp; if (ap->a_bnp != NULL) *ap->a_bnp = ap->a_bn << bshift; if (ap->a_runp != NULL) *ap->a_runp = 1024 * 1024; /* XXX */ return (0); } /* * Strategy routine. * For async requests when nfsiod(s) are running, queue the request by * calling nfs_asyncio(), otherwise just all nfs_doio() to do the * request. */ int nfs_strategy(void *v) { struct vop_strategy_args *ap = v; struct buf *bp = ap->a_bp; int error = 0; if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) panic("nfs physio/async"); /* * If the op is asynchronous and an i/o daemon is waiting * queue the request, wake it up and wait for completion * otherwise just do it ourselves. */ if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(bp)) error = nfs_doio(bp); return (error); } /* * fsync vnode op. Just call nfs_flush() with commit == 1. */ /* ARGSUSED */ int nfs_fsync(void *v) { struct vop_fsync_args /* { struct vnodeop_desc *a_desc; struct vnode * a_vp; kauth_cred_t a_cred; int a_flags; off_t offlo; off_t offhi; struct lwp * a_l; } */ *ap = v; struct vnode *vp = ap->a_vp; if (vp->v_type != VREG) return 0; return (nfs_flush(vp, ap->a_cred, (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, curlwp, 1)); } /* * Flush all the data associated with a vnode. */ int nfs_flush(struct vnode *vp, kauth_cred_t cred, int waitfor, struct lwp *l, int commit) { struct nfsnode *np = VTONFS(vp); int error; int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); rw_enter(vp->v_uobj.vmobjlock, RW_WRITER); error = VOP_PUTPAGES(vp, 0, 0, flushflags); if (np->n_flag & NWRITEERR) { error = np->n_error; np->n_flag &= ~NWRITEERR; } UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); return (error); } /* * Return POSIX pathconf information applicable to nfs. * * N.B. The NFS V2 protocol doesn't support this RPC. */ /* ARGSUSED */ int nfs_pathconf(void *v) { struct vop_pathconf_args /* { struct vnode *a_vp; int a_name; register_t *a_retval; } */ *ap = v; struct nfsv3_pathconf *pcp; struct vnode *vp = ap->a_vp; struct mbuf *mreq, *mrep, *md, *mb; int32_t t1, t2; u_int32_t *tl; char *bpos, *dpos, *cp, *cp2; int error = 0, attrflag; #ifndef NFS_V2_ONLY struct nfsmount *nmp; unsigned int l; u_int64_t maxsize; #endif const int v3 = NFS_ISV3(vp); struct nfsnode *np = VTONFS(vp); switch (ap->a_name) { /* Names that can be resolved locally. */ case _PC_PIPE_BUF: *ap->a_retval = PIPE_BUF; break; case _PC_SYNC_IO: *ap->a_retval = 1; break; /* Names that cannot be resolved locally; do an RPC, if possible. */ case _PC_LINK_MAX: case _PC_NAME_MAX: case _PC_CHOWN_RESTRICTED: case _PC_NO_TRUNC: if (!v3) { error = EINVAL; break; } nfsstats.rpccnt[NFSPROC_PATHCONF]++; nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); nfsm_fhtom(np, 1); nfsm_request(np, NFSPROC_PATHCONF, curlwp, curlwp->l_cred); /* XXX */ nfsm_postop_attr(vp, attrflag, 0); if (!error) { nfsm_dissect(pcp, struct nfsv3_pathconf *, NFSX_V3PATHCONF); switch (ap->a_name) { case _PC_LINK_MAX: *ap->a_retval = fxdr_unsigned(register_t, pcp->pc_linkmax); break; case _PC_NAME_MAX: *ap->a_retval = fxdr_unsigned(register_t, pcp->pc_namemax); break; case _PC_CHOWN_RESTRICTED: *ap->a_retval = (pcp->pc_chownrestricted == nfs_true); break; case _PC_NO_TRUNC: *ap->a_retval = (pcp->pc_notrunc == nfs_true); break; } } nfsm_reqdone; break; case _PC_FILESIZEBITS: #ifndef NFS_V2_ONLY if (v3) { nmp = VFSTONFS(vp->v_mount); if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) if ((error = nfs_fsinfo(nmp, vp, curlwp->l_cred, curlwp)) != 0) /* XXX */ break; for (l = 0, maxsize = nmp->nm_maxfilesize; (maxsize >> l) > 0; l++) ; *ap->a_retval = l + 1; } else #endif { *ap->a_retval = 32; /* NFS V2 limitation */ } break; default: error = genfs_pathconf(ap); break; } return (error); } /* * NFS advisory byte-level locks. */ int nfs_advlock(void *v) { struct vop_advlock_args /* { struct vnode *a_vp; void *a_id; int a_op; struct flock *a_fl; int a_flags; } */ *ap = v; struct nfsnode *np = VTONFS(ap->a_vp); return lf_advlock(ap, &np->n_lockf, np->n_size); } /* * Print out the contents of an nfsnode. */ int nfs_print(void *v) { struct vop_print_args /* { struct vnode *a_vp; } */ *ap = v; struct vnode *vp = ap->a_vp; struct nfsnode *np = VTONFS(vp); printf("tag VT_NFS, fileid %lld fsid 0x%llx", (unsigned long long)np->n_vattr->va_fileid, (unsigned long long)np->n_vattr->va_fsid); if (vp->v_type == VFIFO) VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); printf("\n"); return (0); } /* * nfs unlock wrapper. */ int nfs_unlock(void *v) { struct vop_unlock_args /* { struct vnode *a_vp; int a_flags; } */ *ap = v; struct vnode *vp = ap->a_vp; /* * VOP_UNLOCK can be called by nfs_loadattrcache * with v_data == 0. */ if (VTONFS(vp)) { nfs_delayedtruncate(vp); } return genfs_unlock(v); } /* * nfs special file access vnode op. * Essentially just get vattr and then imitate iaccess() since the device is * local to the client. */ int nfsspec_access(void *v) { struct vop_access_args /* { struct vnode *a_vp; accmode_t a_accmode; kauth_cred_t a_cred; struct lwp *a_l; } */ *ap = v; struct vattr va; struct vnode *vp = ap->a_vp; int error; error = VOP_GETATTR(vp, &va, ap->a_cred); if (error) return (error); /* * Disallow write attempts on filesystems mounted read-only; * unless the file is a socket, fifo, or a block or character * device resident on the filesystem. */ if ((ap->a_accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { switch (vp->v_type) { case VREG: case VDIR: case VLNK: return (EROFS); default: break; } } return kauth_authorize_vnode(ap->a_cred, KAUTH_ACCESS_ACTION( ap->a_accmode, va.va_type, va.va_mode), vp, NULL, genfs_can_access( vp, ap->a_cred, va.va_uid, va.va_gid, va.va_mode, NULL, ap->a_accmode)); } /* * Read wrapper for special devices. */ int nfsspec_read(void *v) { struct vop_read_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; kauth_cred_t a_cred; } */ *ap = v; struct nfsnode *np = VTONFS(ap->a_vp); /* * Set access flag. */ np->n_flag |= NACC; getnanotime(&np->n_atim); return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); } /* * Write wrapper for special devices. */ int nfsspec_write(void *v) { struct vop_write_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; kauth_cred_t a_cred; } */ *ap = v; struct nfsnode *np = VTONFS(ap->a_vp); /* * Set update flag. */ np->n_flag |= NUPD; getnanotime(&np->n_mtim); return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); } /* * Close wrapper for special devices. * * Update the times on the nfsnode then do device close. */ int nfsspec_close(void *v) { struct vop_close_args /* { struct vnode *a_vp; int a_fflag; kauth_cred_t a_cred; struct lwp *a_l; } */ *ap = v; struct vnode *vp = ap->a_vp; struct nfsnode *np = VTONFS(vp); struct vattr vattr; if (np->n_flag & (NACC | NUPD)) { np->n_flag |= NCHG; if (vrefcnt(vp) == 1 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { vattr_null(&vattr); if (np->n_flag & NACC) vattr.va_atime = np->n_atim; if (np->n_flag & NUPD) vattr.va_mtime = np->n_mtim; (void)VOP_SETATTR(vp, &vattr, ap->a_cred); } } return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); } /* * Read wrapper for fifos. */ int nfsfifo_read(void *v) { struct vop_read_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; kauth_cred_t a_cred; } */ *ap = v; struct nfsnode *np = VTONFS(ap->a_vp); /* * Set access flag. */ np->n_flag |= NACC; getnanotime(&np->n_atim); return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); } /* * Write wrapper for fifos. */ int nfsfifo_write(void *v) { struct vop_write_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; kauth_cred_t a_cred; } */ *ap = v; struct nfsnode *np = VTONFS(ap->a_vp); /* * Set update flag. */ np->n_flag |= NUPD; getnanotime(&np->n_mtim); return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); } /* * Close wrapper for fifos. * * Update the times on the nfsnode then do fifo close. */ int nfsfifo_close(void *v) { struct vop_close_args /* { struct vnode *a_vp; int a_fflag; kauth_cred_t a_cred; struct lwp *a_l; } */ *ap = v; struct vnode *vp = ap->a_vp; struct nfsnode *np = VTONFS(vp); struct vattr vattr; if (np->n_flag & (NACC | NUPD)) { struct timespec ts; getnanotime(&ts); if (np->n_flag & NACC) np->n_atim = ts; if (np->n_flag & NUPD) np->n_mtim = ts; np->n_flag |= NCHG; if (vrefcnt(vp) == 1 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { vattr_null(&vattr); if (np->n_flag & NACC) vattr.va_atime = np->n_atim; if (np->n_flag & NUPD) vattr.va_mtime = np->n_mtim; (void)VOP_SETATTR(vp, &vattr, ap->a_cred); } } return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); }