From 6138f242be4f9d989a4052be71f1b116bd806e44 Mon Sep 17 00:00:00 2001 From: Chris Johns Date: Thu, 29 Jul 2021 13:35:16 +1000 Subject: kern/sys: Import NFS and NFS file system client Update #4475 --- freebsd/sys/fs/nfsclient/nfs_clcomsubs.c | 439 +++++++++++++++++++++++++++++++ 1 file changed, 439 insertions(+) create mode 100644 freebsd/sys/fs/nfsclient/nfs_clcomsubs.c (limited to 'freebsd/sys/fs/nfsclient/nfs_clcomsubs.c') diff --git a/freebsd/sys/fs/nfsclient/nfs_clcomsubs.c b/freebsd/sys/fs/nfsclient/nfs_clcomsubs.c new file mode 100644 index 00000000..479a453a --- /dev/null +++ b/freebsd/sys/fs/nfsclient/nfs_clcomsubs.c @@ -0,0 +1,439 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * 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. + * + */ + +#include +__FBSDID("$FreeBSD$"); + +/* + * These functions support the macros and help fiddle mbuf chains for + * the nfs op functions. They do things like create the rpc header and + * copy data between mbuf chains and uio lists. + */ +#ifndef APPLEKEXT +#include + +extern struct nfsstatsv1 nfsstatsv1; +extern int ncl_mbuf_mlen; +extern enum vtype newnv2tov_type[8]; +extern enum vtype nv34tov_type[8]; +NFSCLSTATEMUTEX; +#endif /* !APPLEKEXT */ + +static nfsuint64 nfs_nullcookie = {{ 0, 0 }}; + +/* + * copies a uio scatter/gather list to an mbuf chain. + * NOTE: can ony handle iovcnt == 1 + */ +APPLESTATIC void +nfsm_uiombuf(struct nfsrv_descript *nd, struct uio *uiop, int siz) +{ + char *uiocp; + struct mbuf *mp, *mp2; + int xfer, left, mlen; + int uiosiz, clflg, rem; + char *cp, *tcp; + + KASSERT(uiop->uio_iovcnt == 1, ("nfsm_uiotombuf: iovcnt != 1")); + + if (siz > ncl_mbuf_mlen) /* or should it >= MCLBYTES ?? */ + clflg = 1; + else + clflg = 0; + rem = NFSM_RNDUP(siz) - siz; + mp = mp2 = nd->nd_mb; + while (siz > 0) { + left = uiop->uio_iov->iov_len; + uiocp = uiop->uio_iov->iov_base; + if (left > siz) + left = siz; + uiosiz = left; + while (left > 0) { + mlen = M_TRAILINGSPACE(mp); + if (mlen == 0) { + if (clflg) + NFSMCLGET(mp, M_WAITOK); + else + NFSMGET(mp); + mbuf_setlen(mp, 0); + mbuf_setnext(mp2, mp); + mp2 = mp; + mlen = M_TRAILINGSPACE(mp); + } + xfer = (left > mlen) ? mlen : left; +#ifdef notdef + /* Not Yet.. */ + if (uiop->uio_iov->iov_op != NULL) + (*(uiop->uio_iov->iov_op)) + (uiocp, NFSMTOD(mp, caddr_t) + mbuf_len(mp), + xfer); + else +#endif + if (uiop->uio_segflg == UIO_SYSSPACE) + NFSBCOPY(uiocp, NFSMTOD(mp, caddr_t) + mbuf_len(mp), + xfer); + else + copyin(CAST_USER_ADDR_T(uiocp), NFSMTOD(mp, caddr_t) + + mbuf_len(mp), xfer); + mbuf_setlen(mp, mbuf_len(mp) + xfer); + left -= xfer; + uiocp += xfer; + uiop->uio_offset += xfer; + uiop->uio_resid -= xfer; + } + tcp = (char *)uiop->uio_iov->iov_base; + tcp += uiosiz; + uiop->uio_iov->iov_base = (void *)tcp; + uiop->uio_iov->iov_len -= uiosiz; + siz -= uiosiz; + } + if (rem > 0) { + if (rem > M_TRAILINGSPACE(mp)) { + NFSMGET(mp); + mbuf_setlen(mp, 0); + mbuf_setnext(mp2, mp); + } + cp = NFSMTOD(mp, caddr_t) + mbuf_len(mp); + for (left = 0; left < rem; left++) + *cp++ = '\0'; + mbuf_setlen(mp, mbuf_len(mp) + rem); + nd->nd_bpos = cp; + } else + nd->nd_bpos = NFSMTOD(mp, caddr_t) + mbuf_len(mp); + nd->nd_mb = mp; +} + +/* + * copies a uio scatter/gather list to an mbuf chain. + * This version returns the mbuf list and does not use "nd". + * NOTE: can ony handle iovcnt == 1 + */ +struct mbuf * +nfsm_uiombuflist(struct uio *uiop, int siz, struct mbuf **mbp, char **cpp) +{ + char *uiocp; + struct mbuf *mp, *mp2, *firstmp; + int xfer, left, mlen; + int uiosiz, clflg; + char *tcp; + + KASSERT(uiop->uio_iovcnt == 1, ("nfsm_uiotombuf: iovcnt != 1")); + + if (siz > ncl_mbuf_mlen) /* or should it >= MCLBYTES ?? */ + clflg = 1; + else + clflg = 0; + if (clflg != 0) + NFSMCLGET(mp, M_WAITOK); + else + NFSMGET(mp); + mbuf_setlen(mp, 0); + firstmp = mp2 = mp; + while (siz > 0) { + left = uiop->uio_iov->iov_len; + uiocp = uiop->uio_iov->iov_base; + if (left > siz) + left = siz; + uiosiz = left; + while (left > 0) { + mlen = M_TRAILINGSPACE(mp); + if (mlen == 0) { + if (clflg) + NFSMCLGET(mp, M_WAITOK); + else + NFSMGET(mp); + mbuf_setlen(mp, 0); + mbuf_setnext(mp2, mp); + mp2 = mp; + mlen = M_TRAILINGSPACE(mp); + } + xfer = (left > mlen) ? mlen : left; + if (uiop->uio_segflg == UIO_SYSSPACE) + NFSBCOPY(uiocp, NFSMTOD(mp, caddr_t) + + mbuf_len(mp), xfer); + else + copyin(uiocp, NFSMTOD(mp, caddr_t) + + mbuf_len(mp), xfer); + mbuf_setlen(mp, mbuf_len(mp) + xfer); + left -= xfer; + uiocp += xfer; + uiop->uio_offset += xfer; + uiop->uio_resid -= xfer; + } + tcp = (char *)uiop->uio_iov->iov_base; + tcp += uiosiz; + uiop->uio_iov->iov_base = (void *)tcp; + uiop->uio_iov->iov_len -= uiosiz; + siz -= uiosiz; + } + if (cpp != NULL) + *cpp = NFSMTOD(mp, caddr_t) + mbuf_len(mp); + if (mbp != NULL) + *mbp = mp; + return (firstmp); +} + +/* + * Load vnode attributes from the xdr file attributes. + * Returns EBADRPC if they can't be parsed, 0 otherwise. + */ +APPLESTATIC int +nfsm_loadattr(struct nfsrv_descript *nd, struct nfsvattr *nap) +{ + struct nfs_fattr *fp; + int error = 0; + + if (nd->nd_flag & ND_NFSV4) { + error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL, + NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL); + } else if (nd->nd_flag & ND_NFSV3) { + NFSM_DISSECT(fp, struct nfs_fattr *, NFSX_V3FATTR); + nap->na_type = nfsv34tov_type(fp->fa_type); + nap->na_mode = fxdr_unsigned(u_short, fp->fa_mode); + nap->na_rdev = NFSMAKEDEV( + fxdr_unsigned(int, fp->fa3_rdev.specdata1), + fxdr_unsigned(int, fp->fa3_rdev.specdata2)); + nap->na_nlink = fxdr_unsigned(uint32_t, fp->fa_nlink); + nap->na_uid = fxdr_unsigned(uid_t, fp->fa_uid); + nap->na_gid = fxdr_unsigned(gid_t, fp->fa_gid); + nap->na_size = fxdr_hyper(&fp->fa3_size); + nap->na_blocksize = NFS_FABLKSIZE; + nap->na_bytes = fxdr_hyper(&fp->fa3_used); + nap->na_fileid = fxdr_hyper(&fp->fa3_fileid); + fxdr_nfsv3time(&fp->fa3_atime, &nap->na_atime); + fxdr_nfsv3time(&fp->fa3_ctime, &nap->na_ctime); + fxdr_nfsv3time(&fp->fa3_mtime, &nap->na_mtime); + nap->na_flags = 0; + nap->na_filerev = 0; + } else { + NFSM_DISSECT(fp, struct nfs_fattr *, NFSX_V2FATTR); + nap->na_type = nfsv2tov_type(fp->fa_type); + nap->na_mode = fxdr_unsigned(u_short, fp->fa_mode); + if (nap->na_type == VNON || nap->na_type == VREG) + nap->na_type = IFTOVT(nap->na_mode); + nap->na_rdev = fxdr_unsigned(dev_t, fp->fa2_rdev); + + /* + * Really ugly NFSv2 kludge. + */ + if (nap->na_type == VCHR && nap->na_rdev == ((dev_t)-1)) + nap->na_type = VFIFO; + nap->na_nlink = fxdr_unsigned(u_short, fp->fa_nlink); + nap->na_uid = fxdr_unsigned(uid_t, fp->fa_uid); + nap->na_gid = fxdr_unsigned(gid_t, fp->fa_gid); + nap->na_size = fxdr_unsigned(u_int32_t, fp->fa2_size); + nap->na_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); + nap->na_bytes = + (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) * + NFS_FABLKSIZE; + nap->na_fileid = fxdr_unsigned(uint64_t, fp->fa2_fileid); + fxdr_nfsv2time(&fp->fa2_atime, &nap->na_atime); + fxdr_nfsv2time(&fp->fa2_mtime, &nap->na_mtime); + nap->na_flags = 0; + nap->na_ctime.tv_sec = fxdr_unsigned(u_int32_t, + fp->fa2_ctime.nfsv2_sec); + nap->na_ctime.tv_nsec = 0; + nap->na_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); + nap->na_filerev = 0; + } +nfsmout: + return (error); +} + +/* + * This function finds the directory cookie that corresponds to the + * logical byte offset given. + */ +APPLESTATIC nfsuint64 * +nfscl_getcookie(struct nfsnode *np, off_t off, int add) +{ + struct nfsdmap *dp, *dp2; + int pos; + + pos = off / NFS_DIRBLKSIZ; + if (pos == 0) { + KASSERT(!add, ("nfs getcookie add at 0")); + return (&nfs_nullcookie); + } + pos--; + dp = LIST_FIRST(&np->n_cookies); + if (!dp) { + if (add) { + dp = malloc(sizeof (struct nfsdmap), + M_NFSDIROFF, M_WAITOK); + dp->ndm_eocookie = 0; + LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list); + } else + return (NULL); + } + while (pos >= NFSNUMCOOKIES) { + pos -= NFSNUMCOOKIES; + if (LIST_NEXT(dp, ndm_list) != NULL) { + if (!add && dp->ndm_eocookie < NFSNUMCOOKIES && + pos >= dp->ndm_eocookie) + return (NULL); + dp = LIST_NEXT(dp, ndm_list); + } else if (add) { + dp2 = malloc(sizeof (struct nfsdmap), + M_NFSDIROFF, M_WAITOK); + dp2->ndm_eocookie = 0; + LIST_INSERT_AFTER(dp, dp2, ndm_list); + dp = dp2; + } else + return (NULL); + } + if (pos >= dp->ndm_eocookie) { + if (add) + dp->ndm_eocookie = pos + 1; + else + return (NULL); + } + return (&dp->ndm_cookies[pos]); +} + +/* + * Gets a file handle out of an nfs reply sent to the client and returns + * the file handle and the file's attributes. + * For V4, it assumes that Getfh and Getattr Op's results are here. + */ +APPLESTATIC int +nfscl_mtofh(struct nfsrv_descript *nd, struct nfsfh **nfhpp, + struct nfsvattr *nap, int *attrflagp) +{ + u_int32_t *tl; + int error = 0, flag = 1; + + *nfhpp = NULL; + *attrflagp = 0; + /* + * First get the file handle and vnode. + */ + if (nd->nd_flag & ND_NFSV3) { + NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); + flag = fxdr_unsigned(int, *tl); + } else if (nd->nd_flag & ND_NFSV4) { + NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); + /* If the GetFH failed, clear flag. */ + if (*++tl != 0) { + nd->nd_flag |= ND_NOMOREDATA; + flag = 0; + error = ENXIO; /* Return ENXIO so *nfhpp isn't used. */ + } + } + if (flag) { + error = nfsm_getfh(nd, nfhpp); + if (error) + return (error); + } + + /* + * Now, get the attributes. + */ + if (flag != 0 && (nd->nd_flag & ND_NFSV4) != 0) { + NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED); + if (*++tl != 0) { + nd->nd_flag |= ND_NOMOREDATA; + flag = 0; + } + } else if (nd->nd_flag & ND_NFSV3) { + NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); + if (flag) { + flag = fxdr_unsigned(int, *tl); + } else if (fxdr_unsigned(int, *tl)) { + error = nfsm_advance(nd, NFSX_V3FATTR, -1); + if (error) + return (error); + } + } + if (flag) { + error = nfsm_loadattr(nd, nap); + if (!error) + *attrflagp = 1; + } +nfsmout: + return (error); +} + +/* + * Initialize the owner/delegation sleep lock. + */ +APPLESTATIC void +nfscl_lockinit(struct nfsv4lock *lckp) +{ + + lckp->nfslock_usecnt = 0; + lckp->nfslock_lock = 0; +} + +/* + * Get an exclusive lock. (Not needed for OpenBSD4, since there is only one + * thread for each posix process in the kernel.) + */ +APPLESTATIC void +nfscl_lockexcl(struct nfsv4lock *lckp, void *mutex) +{ + int igotlock; + + do { + igotlock = nfsv4_lock(lckp, 1, NULL, mutex, NULL); + } while (!igotlock); +} + +/* + * Release an exclusive lock. + */ +APPLESTATIC void +nfscl_lockunlock(struct nfsv4lock *lckp) +{ + + nfsv4_unlock(lckp, 0); +} + +/* + * Called to derefernce a lock on a stateid (delegation or open owner). + */ +APPLESTATIC void +nfscl_lockderef(struct nfsv4lock *lckp) +{ + + NFSLOCKCLSTATE(); + lckp->nfslock_usecnt--; + if (lckp->nfslock_usecnt == 0 && (lckp->nfslock_lock & NFSV4LOCK_WANTED)) { + lckp->nfslock_lock &= ~NFSV4LOCK_WANTED; + wakeup((caddr_t)lckp); + } + NFSUNLOCKCLSTATE(); +} + -- cgit v1.2.3