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-rw-r--r--sys/fs/nfsclient/nfs_clcomsubs.c521
1 files changed, 521 insertions, 0 deletions
diff --git a/sys/fs/nfsclient/nfs_clcomsubs.c b/sys/fs/nfsclient/nfs_clcomsubs.c
new file mode 100644
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--- /dev/null
+++ b/sys/fs/nfsclient/nfs_clcomsubs.c
@@ -0,0 +1,521 @@
+/*-
+ * Copyright (c) 1989, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Rick Macklem at The University of Guelph.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <sys/cdefs.h>
+__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 <fs/nfs/nfsport.h>
+
+extern struct nfsstats newnfsstats;
+extern struct nfsv4_opflag nfsv4_opflag[NFSV4OP_NOPS];
+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 }};
+static struct {
+ int op;
+ int opcnt;
+ const u_char *tag;
+ int taglen;
+} nfsv4_opmap[NFS_NPROCS] = {
+ { 0, 1, "Null", 4 },
+ { NFSV4OP_GETATTR, 1, "Getattr", 7, },
+ { NFSV4OP_SETATTR, 2, "Setattr", 7, },
+ { NFSV4OP_LOOKUP, 3, "Lookup", 6, },
+ { NFSV4OP_ACCESS, 2, "Access", 6, },
+ { NFSV4OP_READLINK, 2, "Readlink", 8, },
+ { NFSV4OP_READ, 1, "Read", 4, },
+ { NFSV4OP_WRITE, 2, "Write", 5, },
+ { NFSV4OP_OPEN, 3, "Open", 4, },
+ { NFSV4OP_CREATE, 3, "Create", 6, },
+ { NFSV4OP_CREATE, 1, "Create", 6, },
+ { NFSV4OP_CREATE, 3, "Create", 6, },
+ { NFSV4OP_REMOVE, 1, "Remove", 6, },
+ { NFSV4OP_REMOVE, 1, "Remove", 6, },
+ { NFSV4OP_SAVEFH, 5, "Rename", 6, },
+ { NFSV4OP_SAVEFH, 4, "Link", 4, },
+ { NFSV4OP_READDIR, 2, "Readdir", 7, },
+ { NFSV4OP_READDIR, 2, "Readdir", 7, },
+ { NFSV4OP_GETATTR, 1, "Getattr", 7, },
+ { NFSV4OP_GETATTR, 1, "Getattr", 7, },
+ { NFSV4OP_GETATTR, 1, "Getattr", 7, },
+ { NFSV4OP_COMMIT, 2, "Commit", 6, },
+ { NFSV4OP_LOOKUPP, 3, "Lookupp", 7, },
+ { NFSV4OP_SETCLIENTID, 1, "SetClientID", 11, },
+ { NFSV4OP_SETCLIENTIDCFRM, 1, "SetClientIDConfirm", 18, },
+ { NFSV4OP_LOCK, 1, "Lock", 4, },
+ { NFSV4OP_LOCKU, 1, "LockU", 5, },
+ { NFSV4OP_OPEN, 2, "Open", 4, },
+ { NFSV4OP_CLOSE, 1, "Close", 5, },
+ { NFSV4OP_OPENCONFIRM, 1, "Openconfirm", 11, },
+ { NFSV4OP_LOCKT, 1, "LockT", 5, },
+ { NFSV4OP_OPENDOWNGRADE, 1, "Opendowngrade", 13, },
+ { NFSV4OP_RENEW, 1, "Renew", 5, },
+ { NFSV4OP_PUTROOTFH, 1, "Dirpath", 7, },
+ { NFSV4OP_RELEASELCKOWN, 1, "Rellckown", 9, },
+ { NFSV4OP_DELEGRETURN, 1, "Delegret", 8, },
+ { NFSV4OP_DELEGRETURN, 3, "DelegRemove", 11, },
+ { NFSV4OP_DELEGRETURN, 7, "DelegRename1", 12, },
+ { NFSV4OP_DELEGRETURN, 9, "DelegRename2", 12, },
+ { NFSV4OP_GETATTR, 1, "Getacl", 6, },
+ { NFSV4OP_SETATTR, 1, "Setacl", 6, },
+};
+
+
+/*
+ * NFS RPCS that have large request message size.
+ */
+static int nfs_bigrequest[NFS_NPROCS] = {
+ 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+};
+
+/*
+ * Start building a request. Mostly just put the first file handle in
+ * place.
+ */
+APPLESTATIC void
+nfscl_reqstart(struct nfsrv_descript *nd, int procnum, struct nfsmount *nmp,
+ u_int8_t *nfhp, int fhlen, u_int32_t **opcntpp)
+{
+ struct mbuf *mb;
+ u_int32_t *tl;
+ int opcnt;
+ nfsattrbit_t attrbits;
+
+ /*
+ * First, fill in some of the fields of nd.
+ */
+ if (NFSHASNFSV4(nmp))
+ nd->nd_flag = ND_NFSV4;
+ else if (NFSHASNFSV3(nmp))
+ nd->nd_flag = ND_NFSV3;
+ else
+ nd->nd_flag = ND_NFSV2;
+ nd->nd_procnum = procnum;
+ nd->nd_repstat = 0;
+
+ /*
+ * Get the first mbuf for the request.
+ */
+ if (nfs_bigrequest[procnum])
+ NFSMCLGET(mb, M_WAIT);
+ else
+ NFSMGET(mb);
+ mbuf_setlen(mb, 0);
+ nd->nd_mreq = nd->nd_mb = mb;
+ nd->nd_bpos = NFSMTOD(mb, caddr_t);
+
+ /*
+ * And fill the first file handle into the request.
+ */
+ if (nd->nd_flag & ND_NFSV4) {
+ opcnt = nfsv4_opmap[procnum].opcnt +
+ nfsv4_opflag[nfsv4_opmap[procnum].op].needscfh;
+ /*
+ * What should the tag really be?
+ */
+ (void) nfsm_strtom(nd, nfsv4_opmap[procnum].tag,
+ nfsv4_opmap[procnum].taglen);
+ NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
+ *tl++ = txdr_unsigned(NFSV4_MINORVERSION);
+ if (opcntpp != NULL)
+ *opcntpp = tl;
+ *tl++ = txdr_unsigned(opcnt);
+ if (nfsv4_opflag[nfsv4_opmap[procnum].op].needscfh > 0) {
+ *tl = txdr_unsigned(NFSV4OP_PUTFH);
+ (void) nfsm_fhtom(nd, nfhp, fhlen, 0);
+ if (nfsv4_opflag[nfsv4_opmap[procnum].op].needscfh==2){
+ NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
+ *tl = txdr_unsigned(NFSV4OP_GETATTR);
+ NFSWCCATTR_ATTRBIT(&attrbits);
+ (void) nfsrv_putattrbit(nd, &attrbits);
+ nd->nd_flag |= ND_V4WCCATTR;
+ }
+ NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
+ }
+ *tl = txdr_unsigned(nfsv4_opmap[procnum].op);
+ } else {
+ (void) nfsm_fhtom(nd, nfhp, fhlen, 0);
+ }
+ NFSINCRGLOBAL(newnfsstats.rpccnt[procnum]);
+}
+
+#ifndef APPLE
+/*
+ * 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;
+
+#ifdef DIAGNOSTIC
+ if (uiop->uio_iovcnt != 1)
+ panic("nfsm_uiotombuf: iovcnt != 1");
+#endif
+
+ 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_WAIT);
+ 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;
+}
+#endif /* !APPLE */
+
+/*
+ * 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 = makedev(fxdr_unsigned(u_char, fp->fa3_rdev.specdata1),
+ fxdr_unsigned(u_char, fp->fa3_rdev.specdata2));
+ 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_hyper(&fp->fa3_size);
+ nap->na_blocksize = NFS_FABLKSIZE;
+ nap->na_bytes = fxdr_hyper(&fp->fa3_used);
+ nap->na_fileid = fxdr_unsigned(int32_t,
+ fp->fa3_fileid.nfsuquad[1]);
+ 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(int32_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) {
+#ifdef DIAGNOSTIC
+ if (add)
+ panic("nfs getcookie add at 0");
+#endif
+ return (&nfs_nullcookie);
+ }
+ pos--;
+ dp = LIST_FIRST(&np->n_cookies);
+ if (!dp) {
+ if (add) {
+ MALLOC(dp, struct nfsdmap *, 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) {
+ MALLOC(dp2, struct nfsdmap *, 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 (flag) {
+ error = nfsm_getfh(nd, nfhpp);
+ if (error)
+ return (error);
+ }
+
+ /*
+ * Now, get the attributes.
+ */
+ if (nd->nd_flag & ND_NFSV4) {
+ NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
+ } 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);
+}
+
+/*
+ * Put a state Id in the mbuf list.
+ */
+APPLESTATIC void
+nfsm_stateidtom(struct nfsrv_descript *nd, nfsv4stateid_t *stateidp, int flag)
+{
+ nfsv4stateid_t *st;
+
+ NFSM_BUILD(st, nfsv4stateid_t *, NFSX_STATEID);
+ if (flag == NFSSTATEID_PUTALLZERO) {
+ st->seqid = 0;
+ st->other[0] = 0;
+ st->other[1] = 0;
+ st->other[2] = 0;
+ } else if (flag == NFSSTATEID_PUTALLONE) {
+ st->seqid = 0xffffffff;
+ st->other[0] = 0xffffffff;
+ st->other[1] = 0xffffffff;
+ st->other[2] = 0xffffffff;
+ } else {
+ st->seqid = stateidp->seqid;
+ st->other[0] = stateidp->other[0];
+ st->other[1] = stateidp->other[1];
+ st->other[2] = stateidp->other[2];
+ }
+}
+
+/*
+ * 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);
+ } 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();
+}
+
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