Explicitely track the locked status of the vnode. Reviewed by: pjd Tested by: avg MFC after: 1 week
3895 lines
93 KiB
C
3895 lines
93 KiB
C
/*-
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)nfs_serv.c 8.8 (Berkeley) 7/31/95
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* nfs version 2 and 3 server calls to vnode ops
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* - these routines generally have 3 phases
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* 1 - break down and validate rpc request in mbuf list
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* 2 - do the vnode ops for the request
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* (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c)
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* 3 - build the rpc reply in an mbuf list
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* nb:
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* - do not mix the phases, since the nfsm_?? macros can return failures
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* on a bad rpc or similar and do not do any vrele() or vput()'s
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*
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* - the nfsm_reply() macro generates an nfs rpc reply with the nfs
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* error number iff error != 0 whereas
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* returning an error from the server function implies a fatal error
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* such as a badly constructed rpc request that should be dropped without
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* a reply.
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* For nfsm_reply(), the case where error == EBADRPC is treated
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* specially; after constructing a reply, it does an immediate
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* `goto nfsmout' to avoid getting any V3 post-op status appended.
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*
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* Other notes:
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* Warning: always pay careful attention to resource cleanup on return
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* and note that nfsm_*() macros can terminate a procedure on certain
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* errors.
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*
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* lookup() and namei()
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* may return garbage in various structural fields/return elements
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* if an error is returned, and may garbage up nd.ni_dvp even if no
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* error is returned and you did not request LOCKPARENT or WANTPARENT.
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*
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* We use the ni_cnd.cn_flags 'HASBUF' flag to track whether the name
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* buffer has been freed or not.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/namei.h>
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#include <sys/unistd.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/priv.h>
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#include <sys/dirent.h>
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#include <sys/stat.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_object.h>
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#include <nfs/nfsproto.h>
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#include <nfsserver/nfs.h>
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#include <nfs/xdr_subs.h>
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#include <nfsserver/nfsm_subs.h>
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#ifdef NFSRV_DEBUG
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#define nfsdbprintf(info) printf info
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#else
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#define nfsdbprintf(info)
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#endif
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#define MAX_COMMIT_COUNT (1024 * 1024)
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#define NUM_HEURISTIC 1017
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#define NHUSE_INIT 64
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#define NHUSE_INC 16
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#define NHUSE_MAX 2048
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static struct nfsheur {
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struct vnode *nh_vp; /* vp to match (unreferenced pointer) */
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off_t nh_nextr; /* next offset for sequential detection */
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int nh_use; /* use count for selection */
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int nh_seqcount; /* heuristic */
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} nfsheur[NUM_HEURISTIC];
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/* Global vars */
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int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000;
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int nfsrvw_procrastinate_v3 = 0;
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static struct timeval nfsver = { 0 };
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SYSCTL_NODE(_vfs, OID_AUTO, nfsrv, CTLFLAG_RW, 0, "NFS server");
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static int nfs_async;
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static int nfs_commit_blks;
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static int nfs_commit_miss;
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SYSCTL_INT(_vfs_nfsrv, OID_AUTO, async, CTLFLAG_RW, &nfs_async, 0,
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"Tell client that writes were synced even though they were not");
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SYSCTL_INT(_vfs_nfsrv, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 0,
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"Number of completed commits");
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SYSCTL_INT(_vfs_nfsrv, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 0, "");
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struct nfsrvstats nfsrvstats;
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SYSCTL_STRUCT(_vfs_nfsrv, NFS_NFSRVSTATS, nfsrvstats, CTLFLAG_RW,
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&nfsrvstats, nfsrvstats, "S,nfsrvstats");
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static int nfsrv_access(struct vnode *, accmode_t, struct ucred *,
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int, int);
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/*
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* Clear nameidata fields that are tested in nsfmout cleanup code prior
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* to using first nfsm macro (that might jump to the cleanup code).
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*/
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static __inline void
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ndclear(struct nameidata *nd)
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{
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nd->ni_cnd.cn_flags = 0;
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nd->ni_vp = NULL;
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nd->ni_dvp = NULL;
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nd->ni_startdir = NULL;
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}
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/*
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* Takes two vfslocked integers and returns with at most one
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* reference to giant. The return value indicates whether giant
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* is held by either lock. This simplifies nfsrv ops by allowing
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* them to track only one vfslocked var.
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*/
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static __inline int
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nfsrv_lockedpair(int vfs1, int vfs2)
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{
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if (vfs1 && vfs2)
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VFS_UNLOCK_GIANT(vfs2);
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return (vfs1 | vfs2);
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}
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static __inline int
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nfsrv_lockedpair_nd(int vfs1, struct nameidata *nd)
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{
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int vfs2;
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vfs2 = NDHASGIANT(nd);
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return nfsrv_lockedpair(vfs1, vfs2);
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}
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/*
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* nfs v3 access service
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*/
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int
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nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq)
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{
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struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
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struct sockaddr *nam = nfsd->nd_nam;
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caddr_t dpos = nfsd->nd_dpos;
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struct ucred *cred = nfsd->nd_cr;
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struct vnode *vp = NULL;
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nfsfh_t nfh;
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fhandle_t *fhp;
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u_int32_t *tl;
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caddr_t bpos;
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int error = 0, rdonly, getret;
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struct mbuf *mb, *mreq;
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struct vattr vattr, *vap = &vattr;
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u_long testmode, nfsmode;
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int v3 = (nfsd->nd_flag & ND_NFSV3);
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int vfslocked;
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nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
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if (!v3)
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panic("nfsrv3_access: v3 proc called on a v2 connection");
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vfslocked = 0;
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fhp = &nfh.fh_generic;
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nfsm_srvmtofh(fhp);
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tl = nfsm_dissect_nonblock(u_int32_t *, NFSX_UNSIGNED);
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error = nfsrv_fhtovp(fhp, 1, &vp, &vfslocked, nfsd, slp,
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nam, &rdonly, TRUE);
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if (error) {
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nfsm_reply(NFSX_UNSIGNED);
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nfsm_srvpostop_attr(1, NULL);
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error = 0;
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goto nfsmout;
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}
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nfsmode = fxdr_unsigned(u_int32_t, *tl);
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if ((nfsmode & NFSV3ACCESS_READ) &&
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nfsrv_access(vp, VREAD, cred, rdonly, 0))
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nfsmode &= ~NFSV3ACCESS_READ;
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if (vp->v_type == VDIR)
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testmode = (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
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NFSV3ACCESS_DELETE);
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else
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testmode = (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
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if ((nfsmode & testmode) &&
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nfsrv_access(vp, VWRITE, cred, rdonly, 0))
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nfsmode &= ~testmode;
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if (vp->v_type == VDIR)
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testmode = NFSV3ACCESS_LOOKUP;
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else
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testmode = NFSV3ACCESS_EXECUTE;
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if ((nfsmode & testmode) &&
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nfsrv_access(vp, VEXEC, cred, rdonly, 0))
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nfsmode &= ~testmode;
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getret = VOP_GETATTR(vp, vap, cred);
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vput(vp);
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vp = NULL;
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nfsm_reply(NFSX_POSTOPATTR(1) + NFSX_UNSIGNED);
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nfsm_srvpostop_attr(getret, vap);
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tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED);
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*tl = txdr_unsigned(nfsmode);
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nfsmout:
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if (vp)
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vput(vp);
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VFS_UNLOCK_GIANT(vfslocked);
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return(error);
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}
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/*
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* nfs getattr service
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*/
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int
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nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq)
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{
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struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
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struct sockaddr *nam = nfsd->nd_nam;
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caddr_t dpos = nfsd->nd_dpos;
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struct ucred *cred = nfsd->nd_cr;
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struct nfs_fattr *fp;
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struct vattr va;
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struct vattr *vap = &va;
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struct vnode *vp = NULL;
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nfsfh_t nfh;
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fhandle_t *fhp;
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caddr_t bpos;
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int error = 0, rdonly;
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struct mbuf *mb, *mreq;
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int vfslocked;
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nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
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vfslocked = 0;
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fhp = &nfh.fh_generic;
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nfsm_srvmtofh(fhp);
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error = nfsrv_fhtovp(fhp, 1, &vp, &vfslocked, nfsd, slp, nam,
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&rdonly, TRUE);
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if (error) {
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nfsm_reply(0);
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error = 0;
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goto nfsmout;
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}
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error = VOP_GETATTR(vp, vap, cred);
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vput(vp);
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vp = NULL;
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nfsm_reply(NFSX_FATTR(nfsd->nd_flag & ND_NFSV3));
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if (error) {
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error = 0;
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goto nfsmout;
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}
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fp = nfsm_build(struct nfs_fattr *,
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NFSX_FATTR(nfsd->nd_flag & ND_NFSV3));
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nfsm_srvfillattr(vap, fp);
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/* fall through */
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nfsmout:
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if (vp)
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vput(vp);
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VFS_UNLOCK_GIANT(vfslocked);
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return(error);
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}
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/*
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* nfs setattr service
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*/
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int
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nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
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struct mbuf **mrq)
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{
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struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
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struct sockaddr *nam = nfsd->nd_nam;
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caddr_t dpos = nfsd->nd_dpos;
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struct ucred *cred = nfsd->nd_cr;
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struct vattr va, preat;
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struct vattr *vap = &va;
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struct nfsv2_sattr *sp;
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struct nfs_fattr *fp;
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struct vnode *vp = NULL;
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nfsfh_t nfh;
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fhandle_t *fhp;
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u_int32_t *tl;
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caddr_t bpos;
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int error = 0, rdonly, preat_ret = 1, postat_ret = 1;
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int v3 = (nfsd->nd_flag & ND_NFSV3), gcheck = 0;
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struct mbuf *mb, *mreq;
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struct timespec guard = { 0, 0 };
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struct mount *mp = NULL;
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int tvfslocked;
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int vfslocked;
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nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
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vfslocked = 0;
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fhp = &nfh.fh_generic;
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nfsm_srvmtofh(fhp);
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if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) {
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error = ESTALE;
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goto out;
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}
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vfslocked = VFS_LOCK_GIANT(mp);
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(void) vn_start_write(NULL, &mp, V_WAIT);
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vfs_rel(mp); /* The write holds a ref. */
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VATTR_NULL(vap);
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if (v3) {
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nfsm_srvsattr(vap);
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tl = nfsm_dissect_nonblock(u_int32_t *, NFSX_UNSIGNED);
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gcheck = fxdr_unsigned(int, *tl);
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if (gcheck) {
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tl = nfsm_dissect_nonblock(u_int32_t *, 2 * NFSX_UNSIGNED);
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fxdr_nfsv3time(tl, &guard);
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}
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} else {
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sp = nfsm_dissect_nonblock(struct nfsv2_sattr *, NFSX_V2SATTR);
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/*
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* Nah nah nah nah na nah
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* There is a bug in the Sun client that puts 0xffff in the mode
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* field of sattr when it should put in 0xffffffff. The u_short
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* doesn't sign extend.
|
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* --> check the low order 2 bytes for 0xffff
|
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*/
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if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff)
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vap->va_mode = nfstov_mode(sp->sa_mode);
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if (sp->sa_uid != nfsrv_nfs_xdrneg1)
|
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vap->va_uid = fxdr_unsigned(uid_t, sp->sa_uid);
|
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if (sp->sa_gid != nfsrv_nfs_xdrneg1)
|
|
vap->va_gid = fxdr_unsigned(gid_t, sp->sa_gid);
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if (sp->sa_size != nfsrv_nfs_xdrneg1)
|
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vap->va_size = fxdr_unsigned(u_quad_t, sp->sa_size);
|
|
if (sp->sa_atime.nfsv2_sec != nfsrv_nfs_xdrneg1) {
|
|
#ifdef notyet
|
|
fxdr_nfsv2time(&sp->sa_atime, &vap->va_atime);
|
|
#else
|
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vap->va_atime.tv_sec =
|
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fxdr_unsigned(int32_t, sp->sa_atime.nfsv2_sec);
|
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vap->va_atime.tv_nsec = 0;
|
|
#endif
|
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}
|
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if (sp->sa_mtime.nfsv2_sec != nfsrv_nfs_xdrneg1)
|
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fxdr_nfsv2time(&sp->sa_mtime, &vap->va_mtime);
|
|
|
|
}
|
|
|
|
/*
|
|
* Now that we have all the fields, lets do it.
|
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*/
|
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error = nfsrv_fhtovp(fhp, 1, &vp, &tvfslocked, nfsd, slp,
|
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nam, &rdonly, TRUE);
|
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vfslocked = nfsrv_lockedpair(vfslocked, tvfslocked);
|
|
if (error) {
|
|
nfsm_reply(2 * NFSX_UNSIGNED);
|
|
if (v3)
|
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nfsm_srvwcc_data(preat_ret, &preat, postat_ret, vap);
|
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error = 0;
|
|
goto nfsmout;
|
|
}
|
|
|
|
/*
|
|
* vp now an active resource, pay careful attention to cleanup
|
|
*/
|
|
if (v3) {
|
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error = preat_ret = VOP_GETATTR(vp, &preat, cred);
|
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if (!error && gcheck &&
|
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(preat.va_ctime.tv_sec != guard.tv_sec ||
|
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preat.va_ctime.tv_nsec != guard.tv_nsec))
|
|
error = NFSERR_NOT_SYNC;
|
|
if (error) {
|
|
vput(vp);
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_WCCDATA(v3));
|
|
if (v3)
|
|
nfsm_srvwcc_data(preat_ret, &preat, postat_ret, vap);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the size is being changed write acces is required, otherwise
|
|
* just check for a read only filesystem.
|
|
*/
|
|
if (vap->va_size == ((u_quad_t)((quad_t) -1))) {
|
|
if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) {
|
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error = EROFS;
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|
goto out;
|
|
}
|
|
} else {
|
|
if (vp->v_type == VDIR) {
|
|
error = EISDIR;
|
|
goto out;
|
|
} else if ((error = nfsrv_access(vp, VWRITE, cred, rdonly,
|
|
0)) != 0)
|
|
goto out;
|
|
}
|
|
error = VOP_SETATTR(vp, vap, cred);
|
|
postat_ret = VOP_GETATTR(vp, vap, cred);
|
|
if (!error)
|
|
error = postat_ret;
|
|
out:
|
|
if (vp != NULL)
|
|
vput(vp);
|
|
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_WCCORFATTR(v3));
|
|
if (v3) {
|
|
nfsm_srvwcc_data(preat_ret, &preat, postat_ret, vap);
|
|
} else if (!error) {
|
|
/* v2 non-error case. */
|
|
fp = nfsm_build(struct nfs_fattr *, NFSX_V2FATTR);
|
|
nfsm_srvfillattr(vap, fp);
|
|
}
|
|
error = 0;
|
|
/* fall through */
|
|
|
|
nfsmout:
|
|
if (vp)
|
|
vput(vp);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* nfs lookup rpc
|
|
*/
|
|
int
|
|
nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct nfs_fattr *fp;
|
|
struct nameidata nd, ind, *ndp = &nd;
|
|
struct vnode *vp, *dirp = NULL;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
caddr_t bpos;
|
|
int error = 0, len, dirattr_ret = 1;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3), pubflag;
|
|
struct mbuf *mb, *mreq;
|
|
struct vattr va, dirattr, *vap = &va;
|
|
int tvfslocked;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
ndclear(&nd);
|
|
vfslocked = 0;
|
|
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
nfsm_srvnamesiz(len);
|
|
|
|
pubflag = nfs_ispublicfh(fhp);
|
|
|
|
nd.ni_cnd.cn_cred = cred;
|
|
nd.ni_cnd.cn_nameiop = LOOKUP;
|
|
nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART | MPSAFE;
|
|
error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos,
|
|
&dirp, v3, &dirattr, &dirattr_ret, pubflag);
|
|
vfslocked = NDHASGIANT(&nd);
|
|
|
|
/*
|
|
* namei failure, only dirp to cleanup. Clear out garbarge from
|
|
* structure in case macros jump to nfsmout.
|
|
*/
|
|
|
|
if (error) {
|
|
if (dirp) {
|
|
vrele(dirp);
|
|
dirp = NULL;
|
|
}
|
|
nfsm_reply(NFSX_POSTOPATTR(v3));
|
|
if (v3)
|
|
nfsm_srvpostop_attr(dirattr_ret, &dirattr);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
|
|
/*
|
|
* Locate index file for public filehandle
|
|
*
|
|
* error is 0 on entry and 0 on exit from this block.
|
|
*/
|
|
|
|
if (pubflag) {
|
|
if (nd.ni_vp->v_type == VDIR && nfs_pub.np_index != NULL) {
|
|
/*
|
|
* Setup call to lookup() to see if we can find
|
|
* the index file. Arguably, this doesn't belong
|
|
* in a kernel.. Ugh. If an error occurs, do not
|
|
* try to install an index file and then clear the
|
|
* error.
|
|
*
|
|
* When we replace nd with ind and redirect ndp,
|
|
* maintenance of ni_startdir and ni_vp shift to
|
|
* ind and we have to clean them up in the old nd.
|
|
* However, the cnd resource continues to be maintained
|
|
* via the original nd. Confused? You aren't alone!
|
|
*/
|
|
ind = nd;
|
|
VOP_UNLOCK(nd.ni_vp, 0);
|
|
ind.ni_pathlen = strlen(nfs_pub.np_index);
|
|
ind.ni_cnd.cn_nameptr = ind.ni_cnd.cn_pnbuf =
|
|
nfs_pub.np_index;
|
|
ind.ni_startdir = nd.ni_vp;
|
|
VREF(ind.ni_startdir);
|
|
ind.ni_cnd.cn_flags &= ~GIANTHELD;
|
|
tvfslocked = VFS_LOCK_GIANT(ind.ni_startdir->v_mount);
|
|
if (tvfslocked)
|
|
nd.ni_cnd.cn_flags |= GIANTHELD;
|
|
error = lookup(&ind);
|
|
ind.ni_dvp = NULL;
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &ind);
|
|
ind.ni_cnd.cn_flags &= ~GIANTHELD;
|
|
|
|
if (error == 0) {
|
|
/*
|
|
* Found an index file. Get rid of
|
|
* the old references. transfer nd.ni_vp'
|
|
*/
|
|
if (dirp)
|
|
vrele(dirp);
|
|
dirp = nd.ni_vp;
|
|
nd.ni_vp = NULL;
|
|
vrele(nd.ni_startdir);
|
|
nd.ni_startdir = NULL;
|
|
ndp = &ind;
|
|
}
|
|
error = 0;
|
|
}
|
|
/*
|
|
* If the public filehandle was used, check that this lookup
|
|
* didn't result in a filehandle outside the publicly exported
|
|
* filesystem. We clear the poor vp here to avoid lockups due
|
|
* to NFS I/O.
|
|
*/
|
|
|
|
if (ndp->ni_vp->v_mount != nfs_pub.np_mount) {
|
|
vput(nd.ni_vp);
|
|
nd.ni_vp = NULL;
|
|
error = EPERM;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Resources at this point:
|
|
* ndp->ni_vp may not be NULL
|
|
*/
|
|
|
|
if (error) {
|
|
nfsm_reply(NFSX_POSTOPATTR(v3));
|
|
if (v3)
|
|
nfsm_srvpostop_attr(dirattr_ret, &dirattr);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
|
|
/*
|
|
* Get underlying attribute, then release remaining resources ( for
|
|
* the same potential blocking reason ) and reply.
|
|
*/
|
|
vp = ndp->ni_vp;
|
|
bzero((caddr_t)fhp, sizeof(nfh));
|
|
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
|
|
error = VOP_VPTOFH(vp, &fhp->fh_fid);
|
|
if (!error)
|
|
error = VOP_GETATTR(vp, vap, cred);
|
|
|
|
vput(vp);
|
|
vrele(ndp->ni_startdir);
|
|
vrele(dirp);
|
|
ndp->ni_vp = NULL;
|
|
ndp->ni_startdir = NULL;
|
|
dirp = NULL;
|
|
nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPORFATTR(v3) + NFSX_POSTOPATTR(v3));
|
|
if (error) {
|
|
if (v3)
|
|
nfsm_srvpostop_attr(dirattr_ret, &dirattr);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
nfsm_srvfhtom(fhp, v3);
|
|
if (v3) {
|
|
nfsm_srvpostop_attr(0, vap);
|
|
nfsm_srvpostop_attr(dirattr_ret, &dirattr);
|
|
} else {
|
|
fp = nfsm_build(struct nfs_fattr *, NFSX_V2FATTR);
|
|
nfsm_srvfillattr(vap, fp);
|
|
}
|
|
|
|
nfsmout:
|
|
if (ndp->ni_vp || dirp || ndp->ni_startdir) {
|
|
if (ndp->ni_vp)
|
|
vput(ndp->ni_vp);
|
|
if (dirp)
|
|
vrele(dirp);
|
|
if (ndp->ni_startdir)
|
|
vrele(ndp->ni_startdir);
|
|
}
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs readlink service
|
|
*/
|
|
int
|
|
nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN];
|
|
struct iovec *ivp = iv;
|
|
struct mbuf *mp;
|
|
u_int32_t *tl;
|
|
caddr_t bpos;
|
|
int error = 0, rdonly, i, tlen, len, getret;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
struct mbuf *mb, *mp3, *nmp, *mreq;
|
|
struct vnode *vp = NULL;
|
|
struct vattr attr;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
struct uio io, *uiop = &io;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
vfslocked = 0;
|
|
#ifndef nolint
|
|
mp = NULL;
|
|
#endif
|
|
mp3 = NULL;
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
len = 0;
|
|
i = 0;
|
|
while (len < NFS_MAXPATHLEN) {
|
|
MGET(nmp, M_WAIT, MT_DATA);
|
|
MCLGET(nmp, M_WAIT);
|
|
nmp->m_len = NFSMSIZ(nmp);
|
|
if (len == 0)
|
|
mp3 = mp = nmp;
|
|
else {
|
|
mp->m_next = nmp;
|
|
mp = nmp;
|
|
}
|
|
if ((len + mp->m_len) > NFS_MAXPATHLEN) {
|
|
mp->m_len = NFS_MAXPATHLEN - len;
|
|
len = NFS_MAXPATHLEN;
|
|
} else
|
|
len += mp->m_len;
|
|
ivp->iov_base = mtod(mp, caddr_t);
|
|
ivp->iov_len = mp->m_len;
|
|
i++;
|
|
ivp++;
|
|
}
|
|
uiop->uio_iov = iv;
|
|
uiop->uio_iovcnt = i;
|
|
uiop->uio_offset = 0;
|
|
uiop->uio_resid = len;
|
|
uiop->uio_rw = UIO_READ;
|
|
uiop->uio_segflg = UIO_SYSSPACE;
|
|
uiop->uio_td = NULL;
|
|
error = nfsrv_fhtovp(fhp, 1, &vp, &vfslocked, nfsd, slp,
|
|
nam, &rdonly, TRUE);
|
|
if (error) {
|
|
nfsm_reply(2 * NFSX_UNSIGNED);
|
|
if (v3)
|
|
nfsm_srvpostop_attr(1, NULL);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
if (vp->v_type != VLNK) {
|
|
if (v3)
|
|
error = EINVAL;
|
|
else
|
|
error = ENXIO;
|
|
} else
|
|
error = VOP_READLINK(vp, uiop, cred);
|
|
getret = VOP_GETATTR(vp, &attr, cred);
|
|
vput(vp);
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_UNSIGNED);
|
|
if (v3)
|
|
nfsm_srvpostop_attr(getret, &attr);
|
|
if (error) {
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
if (uiop->uio_resid > 0) {
|
|
len -= uiop->uio_resid;
|
|
tlen = nfsm_rndup(len);
|
|
nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len);
|
|
}
|
|
tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED);
|
|
*tl = txdr_unsigned(len);
|
|
mb->m_next = mp3;
|
|
mp3 = NULL;
|
|
nfsmout:
|
|
if (mp3)
|
|
m_freem(mp3);
|
|
if (vp)
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* nfs read service
|
|
*/
|
|
int
|
|
nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct iovec *iv;
|
|
struct iovec *iv2;
|
|
struct mbuf *m;
|
|
struct nfs_fattr *fp;
|
|
u_int32_t *tl;
|
|
int i;
|
|
caddr_t bpos;
|
|
int error = 0, rdonly, cnt, len, left, siz, tlen, getret;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3), reqlen;
|
|
struct mbuf *mb, *mreq;
|
|
struct mbuf *m2;
|
|
struct vnode *vp = NULL;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
struct uio io, *uiop = &io;
|
|
struct vattr va, *vap = &va;
|
|
struct nfsheur *nh;
|
|
off_t off;
|
|
int ioflag = 0;
|
|
int vfslocked;
|
|
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
vfslocked = 0;
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
if (v3) {
|
|
tl = nfsm_dissect_nonblock(u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
off = fxdr_hyper(tl);
|
|
} else {
|
|
tl = nfsm_dissect_nonblock(u_int32_t *, NFSX_UNSIGNED);
|
|
off = (off_t)fxdr_unsigned(u_int32_t, *tl);
|
|
}
|
|
nfsm_srvstrsiz(reqlen, NFS_SRVMAXDATA(nfsd));
|
|
|
|
/*
|
|
* Reference vp. If an error occurs, vp will be invalid, but we
|
|
* have to NULL it just in case. The macros might goto nfsmout
|
|
* as well.
|
|
*/
|
|
|
|
error = nfsrv_fhtovp(fhp, 1, &vp, &vfslocked, nfsd, slp,
|
|
nam, &rdonly, TRUE);
|
|
if (error) {
|
|
vp = NULL;
|
|
nfsm_reply(2 * NFSX_UNSIGNED);
|
|
if (v3)
|
|
nfsm_srvpostop_attr(1, NULL);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
|
|
if (vp->v_type != VREG) {
|
|
if (v3)
|
|
error = EINVAL;
|
|
else
|
|
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
|
|
}
|
|
if (!error) {
|
|
if ((error = nfsrv_access(vp, VREAD, cred, rdonly, 1)) != 0)
|
|
error = nfsrv_access(vp, VEXEC, cred, rdonly, 1);
|
|
}
|
|
getret = VOP_GETATTR(vp, vap, cred);
|
|
if (!error)
|
|
error = getret;
|
|
if (error) {
|
|
vput(vp);
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_POSTOPATTR(v3));
|
|
if (v3)
|
|
nfsm_srvpostop_attr(getret, vap);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
|
|
/*
|
|
* Calculate byte count to read
|
|
*/
|
|
|
|
if (off >= vap->va_size)
|
|
cnt = 0;
|
|
else if ((off + reqlen) > vap->va_size)
|
|
cnt = vap->va_size - off;
|
|
else
|
|
cnt = reqlen;
|
|
|
|
/*
|
|
* Calculate seqcount for heuristic
|
|
*/
|
|
|
|
{
|
|
int hi;
|
|
int try = 32;
|
|
|
|
/*
|
|
* Locate best candidate
|
|
*/
|
|
|
|
hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC;
|
|
nh = &nfsheur[hi];
|
|
|
|
while (try--) {
|
|
if (nfsheur[hi].nh_vp == vp) {
|
|
nh = &nfsheur[hi];
|
|
break;
|
|
}
|
|
if (nfsheur[hi].nh_use > 0)
|
|
--nfsheur[hi].nh_use;
|
|
hi = (hi + 1) % NUM_HEURISTIC;
|
|
if (nfsheur[hi].nh_use < nh->nh_use)
|
|
nh = &nfsheur[hi];
|
|
}
|
|
|
|
if (nh->nh_vp != vp) {
|
|
nh->nh_vp = vp;
|
|
nh->nh_nextr = off;
|
|
nh->nh_use = NHUSE_INIT;
|
|
if (off == 0)
|
|
nh->nh_seqcount = 4;
|
|
else
|
|
nh->nh_seqcount = 1;
|
|
}
|
|
|
|
/*
|
|
* Calculate heuristic
|
|
*/
|
|
|
|
if ((off == 0 && nh->nh_seqcount > 0) || off == nh->nh_nextr) {
|
|
if (++nh->nh_seqcount > IO_SEQMAX)
|
|
nh->nh_seqcount = IO_SEQMAX;
|
|
} else if (nh->nh_seqcount > 1) {
|
|
nh->nh_seqcount = 1;
|
|
} else {
|
|
nh->nh_seqcount = 0;
|
|
}
|
|
nh->nh_use += NHUSE_INC;
|
|
if (nh->nh_use > NHUSE_MAX)
|
|
nh->nh_use = NHUSE_MAX;
|
|
ioflag |= nh->nh_seqcount << IO_SEQSHIFT;
|
|
}
|
|
|
|
nfsm_reply(NFSX_POSTOPORFATTR(v3) + 3 * NFSX_UNSIGNED+nfsm_rndup(cnt));
|
|
if (v3) {
|
|
tl = nfsm_build(u_int32_t *, NFSX_V3FATTR + 4 * NFSX_UNSIGNED);
|
|
*tl++ = nfsrv_nfs_true;
|
|
fp = (struct nfs_fattr *)tl;
|
|
tl += (NFSX_V3FATTR / sizeof (u_int32_t));
|
|
} else {
|
|
tl = nfsm_build(u_int32_t *, NFSX_V2FATTR + NFSX_UNSIGNED);
|
|
fp = (struct nfs_fattr *)tl;
|
|
tl += (NFSX_V2FATTR / sizeof (u_int32_t));
|
|
}
|
|
len = left = nfsm_rndup(cnt);
|
|
if (cnt > 0) {
|
|
/*
|
|
* Generate the mbuf list with the uio_iov ref. to it.
|
|
*/
|
|
i = 0;
|
|
m = m2 = mb;
|
|
while (left > 0) {
|
|
siz = min(M_TRAILINGSPACE(m), left);
|
|
if (siz > 0) {
|
|
left -= siz;
|
|
i++;
|
|
}
|
|
if (left > 0) {
|
|
MGET(m, M_WAIT, MT_DATA);
|
|
MCLGET(m, M_WAIT);
|
|
m->m_len = 0;
|
|
m2->m_next = m;
|
|
m2 = m;
|
|
}
|
|
}
|
|
iv = malloc(i * sizeof (struct iovec),
|
|
M_TEMP, M_WAITOK);
|
|
uiop->uio_iov = iv2 = iv;
|
|
m = mb;
|
|
left = len;
|
|
i = 0;
|
|
while (left > 0) {
|
|
if (m == NULL)
|
|
panic("nfsrv_read iov");
|
|
siz = min(M_TRAILINGSPACE(m), left);
|
|
if (siz > 0) {
|
|
iv->iov_base = mtod(m, caddr_t) + m->m_len;
|
|
iv->iov_len = siz;
|
|
m->m_len += siz;
|
|
left -= siz;
|
|
iv++;
|
|
i++;
|
|
}
|
|
m = m->m_next;
|
|
}
|
|
uiop->uio_iovcnt = i;
|
|
uiop->uio_offset = off;
|
|
uiop->uio_resid = len;
|
|
uiop->uio_rw = UIO_READ;
|
|
uiop->uio_segflg = UIO_SYSSPACE;
|
|
error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred);
|
|
off = uiop->uio_offset;
|
|
nh->nh_nextr = off;
|
|
free((caddr_t)iv2, M_TEMP);
|
|
if (error || (getret = VOP_GETATTR(vp, vap, cred))) {
|
|
if (!error)
|
|
error = getret;
|
|
m_freem(mreq);
|
|
vput(vp);
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_POSTOPATTR(v3));
|
|
if (v3)
|
|
nfsm_srvpostop_attr(getret, vap);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
} else
|
|
uiop->uio_resid = 0;
|
|
vput(vp);
|
|
vp = NULL;
|
|
nfsm_srvfillattr(vap, fp);
|
|
tlen = len - uiop->uio_resid;
|
|
cnt = cnt < tlen ? cnt : tlen;
|
|
tlen = nfsm_rndup(cnt);
|
|
if (len != tlen || tlen != cnt)
|
|
nfsm_adj(mb, len - tlen, tlen - cnt);
|
|
if (v3) {
|
|
*tl++ = txdr_unsigned(cnt);
|
|
if (cnt < reqlen)
|
|
*tl++ = nfsrv_nfs_true;
|
|
else
|
|
*tl++ = nfsrv_nfs_false;
|
|
}
|
|
*tl = txdr_unsigned(cnt);
|
|
nfsmout:
|
|
if (vp)
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* nfs write service
|
|
*/
|
|
int
|
|
nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct iovec *ivp;
|
|
int i, cnt;
|
|
struct mbuf *mp;
|
|
struct nfs_fattr *fp;
|
|
struct iovec *iv;
|
|
struct vattr va, forat;
|
|
struct vattr *vap = &va;
|
|
u_int32_t *tl;
|
|
caddr_t bpos;
|
|
int error = 0, rdonly, len, forat_ret = 1;
|
|
int ioflags, aftat_ret = 1, retlen = 0, zeroing, adjust;
|
|
int stable = NFSV3WRITE_FILESYNC;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
struct mbuf *mb, *mreq;
|
|
struct vnode *vp = NULL;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
struct uio io, *uiop = &io;
|
|
off_t off;
|
|
struct mount *mntp = NULL;
|
|
int tvfslocked;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
vfslocked = 0;
|
|
if (mrep == NULL) {
|
|
*mrq = NULL;
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
if ((mntp = vfs_getvfs(&fhp->fh_fsid)) == NULL) {
|
|
error = ESTALE;
|
|
goto ereply;
|
|
}
|
|
vfslocked = VFS_LOCK_GIANT(mntp);
|
|
(void) vn_start_write(NULL, &mntp, V_WAIT);
|
|
vfs_rel(mntp); /* The write holds a ref. */
|
|
if (v3) {
|
|
tl = nfsm_dissect_nonblock(u_int32_t *, 5 * NFSX_UNSIGNED);
|
|
off = fxdr_hyper(tl);
|
|
tl += 3;
|
|
stable = fxdr_unsigned(int, *tl++);
|
|
} else {
|
|
tl = nfsm_dissect_nonblock(u_int32_t *, 4 * NFSX_UNSIGNED);
|
|
off = (off_t)fxdr_unsigned(u_int32_t, *++tl);
|
|
tl += 2;
|
|
if (nfs_async)
|
|
stable = NFSV3WRITE_UNSTABLE;
|
|
}
|
|
retlen = len = fxdr_unsigned(int32_t, *tl);
|
|
cnt = i = 0;
|
|
|
|
/*
|
|
* For NFS Version 2, it is not obvious what a write of zero length
|
|
* should do, but I might as well be consistent with Version 3,
|
|
* which is to return ok so long as there are no permission problems.
|
|
*/
|
|
if (len > 0) {
|
|
zeroing = 1;
|
|
mp = mrep;
|
|
while (mp) {
|
|
if (mp == md) {
|
|
zeroing = 0;
|
|
adjust = dpos - mtod(mp, caddr_t);
|
|
mp->m_len -= adjust;
|
|
if (mp->m_len > 0 && adjust > 0)
|
|
mp->m_data += adjust;
|
|
}
|
|
if (zeroing)
|
|
mp->m_len = 0;
|
|
else if (mp->m_len > 0) {
|
|
i += mp->m_len;
|
|
if (i > len) {
|
|
mp->m_len -= (i - len);
|
|
zeroing = 1;
|
|
}
|
|
if (mp->m_len > 0)
|
|
cnt++;
|
|
}
|
|
mp = mp->m_next;
|
|
}
|
|
}
|
|
if (len > NFS_MAXDATA || len < 0 || i < len) {
|
|
error = EIO;
|
|
nfsm_reply(2 * NFSX_UNSIGNED);
|
|
if (v3)
|
|
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
error = nfsrv_fhtovp(fhp, 1, &vp, &tvfslocked, nfsd, slp,
|
|
nam, &rdonly, TRUE);
|
|
vfslocked = nfsrv_lockedpair(vfslocked, tvfslocked);
|
|
if (error) {
|
|
vp = NULL;
|
|
nfsm_reply(2 * NFSX_UNSIGNED);
|
|
if (v3)
|
|
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
if (v3)
|
|
forat_ret = VOP_GETATTR(vp, &forat, cred);
|
|
if (vp->v_type != VREG) {
|
|
if (v3)
|
|
error = EINVAL;
|
|
else
|
|
error = (vp->v_type == VDIR) ? EISDIR : EACCES;
|
|
}
|
|
if (!error)
|
|
error = nfsrv_access(vp, VWRITE, cred, rdonly, 1);
|
|
if (error) {
|
|
vput(vp);
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_WCCDATA(v3));
|
|
if (v3)
|
|
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
|
|
if (len > 0) {
|
|
ivp = malloc(cnt * sizeof (struct iovec), M_TEMP,
|
|
M_WAITOK);
|
|
uiop->uio_iov = iv = ivp;
|
|
uiop->uio_iovcnt = cnt;
|
|
mp = mrep;
|
|
while (mp) {
|
|
if (mp->m_len > 0) {
|
|
ivp->iov_base = mtod(mp, caddr_t);
|
|
ivp->iov_len = mp->m_len;
|
|
ivp++;
|
|
}
|
|
mp = mp->m_next;
|
|
}
|
|
|
|
/*
|
|
* XXX
|
|
* The IO_METASYNC flag indicates that all metadata (and not just
|
|
* enough to ensure data integrity) mus be written to stable storage
|
|
* synchronously.
|
|
* (IO_METASYNC is not yet implemented in 4.4BSD-Lite.)
|
|
*/
|
|
if (stable == NFSV3WRITE_UNSTABLE)
|
|
ioflags = IO_NODELOCKED;
|
|
else if (stable == NFSV3WRITE_DATASYNC)
|
|
ioflags = (IO_SYNC | IO_NODELOCKED);
|
|
else
|
|
ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED);
|
|
uiop->uio_resid = len;
|
|
uiop->uio_rw = UIO_WRITE;
|
|
uiop->uio_segflg = UIO_SYSSPACE;
|
|
uiop->uio_td = NULL;
|
|
uiop->uio_offset = off;
|
|
error = VOP_WRITE(vp, uiop, ioflags, cred);
|
|
/* Unlocked write. */
|
|
nfsrvstats.srvvop_writes++;
|
|
free((caddr_t)iv, M_TEMP);
|
|
}
|
|
aftat_ret = VOP_GETATTR(vp, vap, cred);
|
|
vput(vp);
|
|
vp = NULL;
|
|
if (!error)
|
|
error = aftat_ret;
|
|
ereply:
|
|
nfsm_reply(NFSX_PREOPATTR(v3) + NFSX_POSTOPORFATTR(v3) +
|
|
2 * NFSX_UNSIGNED + NFSX_WRITEVERF(v3));
|
|
if (v3) {
|
|
nfsm_srvwcc_data(forat_ret, &forat, aftat_ret, vap);
|
|
if (error) {
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
tl = nfsm_build(u_int32_t *, 4 * NFSX_UNSIGNED);
|
|
*tl++ = txdr_unsigned(retlen);
|
|
/*
|
|
* If nfs_async is set, then pretend the write was FILESYNC.
|
|
*/
|
|
if (stable == NFSV3WRITE_UNSTABLE && !nfs_async)
|
|
*tl++ = txdr_unsigned(stable);
|
|
else
|
|
*tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC);
|
|
/*
|
|
* Actually, there is no need to txdr these fields,
|
|
* but it may make the values more human readable,
|
|
* for debugging purposes.
|
|
*/
|
|
if (nfsver.tv_sec == 0)
|
|
nfsver = boottime;
|
|
*tl++ = txdr_unsigned(nfsver.tv_sec);
|
|
*tl = txdr_unsigned(nfsver.tv_usec);
|
|
} else if (!error) {
|
|
/* v2 non-error case. */
|
|
fp = nfsm_build(struct nfs_fattr *, NFSX_V2FATTR);
|
|
nfsm_srvfillattr(vap, fp);
|
|
}
|
|
error = 0;
|
|
nfsmout:
|
|
if (vp)
|
|
vput(vp);
|
|
vn_finished_write(mntp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* nfs create service
|
|
* now does a truncate to 0 length via. setattr if it already exists
|
|
*/
|
|
int
|
|
nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct nfs_fattr *fp;
|
|
struct vattr va, dirfor, diraft;
|
|
struct vattr *vap = &va;
|
|
struct nfsv2_sattr *sp;
|
|
u_int32_t *tl;
|
|
struct nameidata nd;
|
|
caddr_t bpos;
|
|
int error = 0, rdev, len, tsize, dirfor_ret = 1, diraft_ret = 1;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3), how, exclusive_flag = 0;
|
|
struct mbuf *mb, *mreq;
|
|
struct vnode *dirp = NULL;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
u_quad_t tempsize;
|
|
struct timespec cverf;
|
|
struct mount *mp = NULL;
|
|
int tvfslocked;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
vfslocked = 0;
|
|
#ifndef nolint
|
|
rdev = 0;
|
|
#endif
|
|
ndclear(&nd);
|
|
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) {
|
|
error = ESTALE;
|
|
goto ereply;
|
|
}
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
(void) vn_start_write(NULL, &mp, V_WAIT);
|
|
vfs_rel(mp); /* The write holds a ref. */
|
|
nfsm_srvnamesiz(len);
|
|
|
|
nd.ni_cnd.cn_cred = cred;
|
|
nd.ni_cnd.cn_nameiop = CREATE;
|
|
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART | MPSAFE;
|
|
|
|
/*
|
|
* Call namei and do initial cleanup to get a few things
|
|
* out of the way. If we get an initial error we cleanup
|
|
* and return here to avoid special-casing the invalid nd
|
|
* structure through the rest of the case. dirp may be
|
|
* set even if an error occurs, but the nd structure will not
|
|
* be valid at all if an error occurs so we have to invalidate it
|
|
* prior to calling nfsm_reply ( which might goto nfsmout ).
|
|
*/
|
|
error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos,
|
|
&dirp, v3, &dirfor, &dirfor_ret, FALSE);
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &nd);
|
|
if (dirp && !v3) {
|
|
vrele(dirp);
|
|
dirp = NULL;
|
|
}
|
|
if (error) {
|
|
nfsm_reply(NFSX_WCCDATA(v3));
|
|
if (v3)
|
|
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
|
|
/*
|
|
* No error. Continue. State:
|
|
*
|
|
* startdir is valid ( we release this immediately )
|
|
* dirp may be valid
|
|
* nd.ni_vp may be valid
|
|
* nd.ni_dvp is valid
|
|
*
|
|
* The error state is set through the code and we may also do some
|
|
* opportunistic releasing of vnodes to avoid holding locks through
|
|
* NFS I/O. The cleanup at the end is a catch-all
|
|
*/
|
|
|
|
VATTR_NULL(vap);
|
|
if (v3) {
|
|
tl = nfsm_dissect_nonblock(u_int32_t *, NFSX_UNSIGNED);
|
|
how = fxdr_unsigned(int, *tl);
|
|
switch (how) {
|
|
case NFSV3CREATE_GUARDED:
|
|
if (nd.ni_vp) {
|
|
error = EEXIST;
|
|
break;
|
|
}
|
|
/* fall through */
|
|
case NFSV3CREATE_UNCHECKED:
|
|
nfsm_srvsattr(vap);
|
|
break;
|
|
case NFSV3CREATE_EXCLUSIVE:
|
|
tl = nfsm_dissect_nonblock(u_int32_t *,
|
|
NFSX_V3CREATEVERF);
|
|
/* Unique bytes, endianness is not important. */
|
|
cverf.tv_sec = (int32_t)tl[0];
|
|
cverf.tv_nsec = tl[1];
|
|
exclusive_flag = 1;
|
|
break;
|
|
};
|
|
vap->va_type = VREG;
|
|
} else {
|
|
sp = nfsm_dissect_nonblock(struct nfsv2_sattr *, NFSX_V2SATTR);
|
|
vap->va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode));
|
|
if (vap->va_type == VNON)
|
|
vap->va_type = VREG;
|
|
vap->va_mode = nfstov_mode(sp->sa_mode);
|
|
switch (vap->va_type) {
|
|
case VREG:
|
|
tsize = fxdr_unsigned(int32_t, sp->sa_size);
|
|
if (tsize != -1)
|
|
vap->va_size = (u_quad_t)tsize;
|
|
break;
|
|
case VCHR:
|
|
case VBLK:
|
|
case VFIFO:
|
|
rdev = fxdr_unsigned(long, sp->sa_size);
|
|
break;
|
|
default:
|
|
break;
|
|
};
|
|
}
|
|
|
|
/*
|
|
* Iff doesn't exist, create it
|
|
* otherwise just truncate to 0 length
|
|
* should I set the mode too ?
|
|
*
|
|
* The only possible error we can have at this point is EEXIST.
|
|
* nd.ni_vp will also be non-NULL in that case.
|
|
*/
|
|
if (nd.ni_vp == NULL) {
|
|
if (vap->va_mode == (mode_t)VNOVAL)
|
|
vap->va_mode = 0;
|
|
if (vap->va_type == VREG || vap->va_type == VSOCK) {
|
|
error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
|
|
if (error)
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
else {
|
|
if (exclusive_flag) {
|
|
exclusive_flag = 0;
|
|
VATTR_NULL(vap);
|
|
vap->va_atime = cverf;
|
|
error = VOP_SETATTR(nd.ni_vp, vap,
|
|
cred);
|
|
}
|
|
}
|
|
} else if (vap->va_type == VCHR || vap->va_type == VBLK ||
|
|
vap->va_type == VFIFO) {
|
|
/*
|
|
* NFSv2-specific code for creating device nodes
|
|
* and fifos.
|
|
*
|
|
* Handle SysV FIFO node special cases. All other
|
|
* devices require super user to access.
|
|
*/
|
|
if (vap->va_type == VCHR && rdev == 0xffffffff)
|
|
vap->va_type = VFIFO;
|
|
if (vap->va_type != VFIFO &&
|
|
(error = priv_check_cred(cred, PRIV_VFS_MKNOD_DEV,
|
|
0))) {
|
|
goto ereply;
|
|
}
|
|
vap->va_rdev = rdev;
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
|
|
if (error) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
goto ereply;
|
|
}
|
|
vput(nd.ni_vp);
|
|
nd.ni_vp = NULL;
|
|
|
|
/*
|
|
* release dvp prior to lookup
|
|
*/
|
|
vput(nd.ni_dvp);
|
|
nd.ni_dvp = NULL;
|
|
/*
|
|
* Setup for lookup.
|
|
*
|
|
* Even though LOCKPARENT was cleared, ni_dvp may
|
|
* be garbage.
|
|
*/
|
|
nd.ni_cnd.cn_nameiop = LOOKUP;
|
|
nd.ni_cnd.cn_flags &= ~(LOCKPARENT);
|
|
nd.ni_cnd.cn_thread = curthread;
|
|
nd.ni_cnd.cn_cred = cred;
|
|
tvfslocked = VFS_LOCK_GIANT(nd.ni_startdir->v_mount);
|
|
if (tvfslocked)
|
|
nd.ni_cnd.cn_flags |= GIANTHELD;
|
|
error = lookup(&nd);
|
|
nd.ni_dvp = NULL;
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &nd);
|
|
nd.ni_cnd.cn_flags &= ~GIANTHELD;
|
|
if (error)
|
|
goto ereply;
|
|
|
|
if (nd.ni_cnd.cn_flags & ISSYMLINK) {
|
|
error = EINVAL;
|
|
goto ereply;
|
|
}
|
|
} else {
|
|
error = ENXIO;
|
|
}
|
|
} else {
|
|
if (vap->va_size != -1) {
|
|
error = nfsrv_access(nd.ni_vp, VWRITE,
|
|
cred, (nd.ni_cnd.cn_flags & RDONLY), 0);
|
|
if (!error) {
|
|
tempsize = vap->va_size;
|
|
VATTR_NULL(vap);
|
|
vap->va_size = tempsize;
|
|
error = VOP_SETATTR(nd.ni_vp, vap, cred);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!error) {
|
|
bzero((caddr_t)fhp, sizeof(nfh));
|
|
fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid;
|
|
error = VOP_VPTOFH(nd.ni_vp, &fhp->fh_fid);
|
|
if (!error)
|
|
error = VOP_GETATTR(nd.ni_vp, vap, cred);
|
|
}
|
|
if (v3) {
|
|
if (exclusive_flag && !error &&
|
|
bcmp(&cverf, &vap->va_atime, sizeof (cverf)))
|
|
error = EEXIST;
|
|
if (dirp == nd.ni_dvp)
|
|
diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
|
|
else {
|
|
/* Drop the other locks to avoid deadlock. */
|
|
if (nd.ni_dvp) {
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
if (nd.ni_vp)
|
|
vput(nd.ni_vp);
|
|
nd.ni_dvp = NULL;
|
|
nd.ni_vp = NULL;
|
|
|
|
vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY);
|
|
diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
|
|
VOP_UNLOCK(dirp, 0);
|
|
}
|
|
}
|
|
ereply:
|
|
nfsm_reply(NFSX_SRVFH(v3) + NFSX_FATTR(v3) + NFSX_WCCDATA(v3));
|
|
if (v3) {
|
|
if (!error) {
|
|
nfsm_srvpostop_fh(fhp);
|
|
nfsm_srvpostop_attr(0, vap);
|
|
}
|
|
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
|
|
} else if (!error) {
|
|
/* v2 non-error case. */
|
|
nfsm_srvfhtom(fhp, v3);
|
|
fp = nfsm_build(struct nfs_fattr *, NFSX_V2FATTR);
|
|
nfsm_srvfillattr(vap, fp);
|
|
}
|
|
error = 0;
|
|
|
|
nfsmout:
|
|
if (nd.ni_dvp) {
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
if (nd.ni_vp)
|
|
vput(nd.ni_vp);
|
|
if (nd.ni_startdir) {
|
|
vrele(nd.ni_startdir);
|
|
nd.ni_startdir = NULL;
|
|
}
|
|
if (dirp)
|
|
vrele(dirp);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs v3 mknod service
|
|
*/
|
|
int
|
|
nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct vattr va, dirfor, diraft;
|
|
struct vattr *vap = &va;
|
|
struct thread *td = curthread;
|
|
u_int32_t *tl;
|
|
struct nameidata nd;
|
|
caddr_t bpos;
|
|
int error = 0, len, dirfor_ret = 1, diraft_ret = 1;
|
|
u_int32_t major, minor;
|
|
enum vtype vtyp;
|
|
struct mbuf *mb, *mreq;
|
|
struct vnode *vp, *dirp = NULL;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
struct mount *mp = NULL;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
int tvfslocked;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
vfslocked = 0;
|
|
if (!v3)
|
|
panic("nfsrv_mknod: v3 proc called on a v2 connection");
|
|
ndclear(&nd);
|
|
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) {
|
|
error = ESTALE;
|
|
goto ereply;
|
|
}
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
(void) vn_start_write(NULL, &mp, V_WAIT);
|
|
vfs_rel(mp); /* The write holds a ref. */
|
|
nfsm_srvnamesiz(len);
|
|
|
|
nd.ni_cnd.cn_cred = cred;
|
|
nd.ni_cnd.cn_nameiop = CREATE;
|
|
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART | MPSAFE;
|
|
|
|
/*
|
|
* Handle nfs_namei() call. If an error occurs, the nd structure
|
|
* is not valid. However, nfsm_*() routines may still jump to
|
|
* nfsmout.
|
|
*/
|
|
|
|
error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos,
|
|
&dirp, v3, &dirfor, &dirfor_ret, FALSE);
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &nd);
|
|
if (error) {
|
|
nfsm_reply(NFSX_WCCDATA(1));
|
|
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
tl = nfsm_dissect_nonblock(u_int32_t *, NFSX_UNSIGNED);
|
|
vtyp = nfsv3tov_type(*tl);
|
|
if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) {
|
|
error = NFSERR_BADTYPE;
|
|
goto out;
|
|
}
|
|
VATTR_NULL(vap);
|
|
nfsm_srvsattr(vap);
|
|
if (vtyp == VCHR || vtyp == VBLK) {
|
|
tl = nfsm_dissect_nonblock(u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
major = fxdr_unsigned(u_int32_t, *tl++);
|
|
minor = fxdr_unsigned(u_int32_t, *tl);
|
|
vap->va_rdev = makedev(major, minor);
|
|
}
|
|
|
|
/*
|
|
* Iff doesn't exist, create it.
|
|
*/
|
|
if (nd.ni_vp) {
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
vap->va_type = vtyp;
|
|
if (vap->va_mode == (mode_t)VNOVAL)
|
|
vap->va_mode = 0;
|
|
if (vtyp == VSOCK) {
|
|
vrele(nd.ni_startdir);
|
|
nd.ni_startdir = NULL;
|
|
error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
|
|
if (error)
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
} else {
|
|
if (vtyp != VFIFO && (error = priv_check_cred(cred,
|
|
PRIV_VFS_MKNOD_DEV, 0)))
|
|
goto out;
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
|
|
if (error) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
goto out;
|
|
}
|
|
vput(nd.ni_vp);
|
|
nd.ni_vp = NULL;
|
|
|
|
/*
|
|
* Release dvp prior to lookup
|
|
*/
|
|
vput(nd.ni_dvp);
|
|
nd.ni_dvp = NULL;
|
|
|
|
nd.ni_cnd.cn_nameiop = LOOKUP;
|
|
nd.ni_cnd.cn_flags &= ~(LOCKPARENT);
|
|
nd.ni_cnd.cn_thread = td;
|
|
nd.ni_cnd.cn_cred = td->td_ucred;
|
|
tvfslocked = VFS_LOCK_GIANT(nd.ni_startdir->v_mount);
|
|
if (tvfslocked)
|
|
nd.ni_cnd.cn_flags |= GIANTHELD;
|
|
error = lookup(&nd);
|
|
nd.ni_dvp = NULL;
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &nd);
|
|
nd.ni_cnd.cn_flags &= ~GIANTHELD;
|
|
|
|
if (error)
|
|
goto out;
|
|
if (nd.ni_cnd.cn_flags & ISSYMLINK)
|
|
error = EINVAL;
|
|
}
|
|
|
|
/*
|
|
* send response, cleanup, return.
|
|
*/
|
|
out:
|
|
vp = nd.ni_vp;
|
|
if (!error) {
|
|
bzero((caddr_t)fhp, sizeof(nfh));
|
|
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
|
|
error = VOP_VPTOFH(vp, &fhp->fh_fid);
|
|
if (!error)
|
|
error = VOP_GETATTR(vp, vap, cred);
|
|
}
|
|
if (nd.ni_dvp) {
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
nd.ni_dvp = NULL;
|
|
}
|
|
if (vp) {
|
|
vput(vp);
|
|
vp = NULL;
|
|
nd.ni_vp = NULL;
|
|
}
|
|
if (nd.ni_startdir) {
|
|
vrele(nd.ni_startdir);
|
|
nd.ni_startdir = NULL;
|
|
}
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (dirp) {
|
|
vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY);
|
|
diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
|
|
vput(dirp);
|
|
}
|
|
ereply:
|
|
nfsm_reply(NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + NFSX_WCCDATA(1));
|
|
if (v3) {
|
|
if (!error) {
|
|
nfsm_srvpostop_fh(fhp);
|
|
nfsm_srvpostop_attr(0, vap);
|
|
}
|
|
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
|
|
}
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (0);
|
|
nfsmout:
|
|
if (nd.ni_dvp) {
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
if (nd.ni_vp)
|
|
vput(nd.ni_vp);
|
|
if (dirp)
|
|
vrele(dirp);
|
|
if (nd.ni_startdir)
|
|
vrele(nd.ni_startdir);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs remove service
|
|
*/
|
|
int
|
|
nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct nameidata nd;
|
|
caddr_t bpos;
|
|
int error = 0, len, dirfor_ret = 1, diraft_ret = 1;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
struct mbuf *mb, *mreq;
|
|
struct vnode *dirp;
|
|
struct vattr dirfor, diraft;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
struct mount *mp = NULL;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
ndclear(&nd);
|
|
vfslocked = 0;
|
|
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) {
|
|
error = ESTALE;
|
|
goto ereply;
|
|
}
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
(void) vn_start_write(NULL, &mp, V_WAIT);
|
|
vfs_rel(mp); /* The write holds a ref. */
|
|
nfsm_srvnamesiz(len);
|
|
|
|
nd.ni_cnd.cn_cred = cred;
|
|
nd.ni_cnd.cn_nameiop = DELETE;
|
|
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | MPSAFE;
|
|
error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos,
|
|
&dirp, v3, &dirfor, &dirfor_ret, FALSE);
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &nd);
|
|
if (dirp && !v3) {
|
|
vrele(dirp);
|
|
dirp = NULL;
|
|
}
|
|
if (error == 0) {
|
|
if (nd.ni_vp->v_type == VDIR) {
|
|
error = EPERM; /* POSIX */
|
|
goto out;
|
|
}
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*/
|
|
if (nd.ni_vp->v_vflag & VV_ROOT) {
|
|
error = EBUSY;
|
|
goto out;
|
|
}
|
|
out:
|
|
if (!error) {
|
|
error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
}
|
|
}
|
|
if (dirp && v3) {
|
|
if (dirp == nd.ni_dvp)
|
|
diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
|
|
else {
|
|
/* Drop the other locks to avoid deadlock. */
|
|
if (nd.ni_dvp) {
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
if (nd.ni_vp)
|
|
vput(nd.ni_vp);
|
|
nd.ni_dvp = NULL;
|
|
nd.ni_vp = NULL;
|
|
|
|
vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY);
|
|
diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
|
|
VOP_UNLOCK(dirp, 0);
|
|
}
|
|
vrele(dirp);
|
|
dirp = NULL;
|
|
}
|
|
ereply:
|
|
nfsm_reply(NFSX_WCCDATA(v3));
|
|
if (v3)
|
|
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
|
|
error = 0;
|
|
nfsmout:
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_dvp) {
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
if (nd.ni_vp)
|
|
vput(nd.ni_vp);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* nfs rename service
|
|
*/
|
|
int
|
|
nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
caddr_t bpos;
|
|
int error = 0, len, len2, fdirfor_ret = 1, fdiraft_ret = 1;
|
|
int tdirfor_ret = 1, tdiraft_ret = 1;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
struct mbuf *mb, *mreq;
|
|
struct nameidata fromnd, tond;
|
|
struct vnode *fvp, *tvp, *tdvp, *fdirp = NULL;
|
|
struct vnode *tdirp = NULL;
|
|
struct vattr fdirfor, fdiraft, tdirfor, tdiraft;
|
|
nfsfh_t fnfh, tnfh;
|
|
fhandle_t *ffhp, *tfhp;
|
|
uid_t saved_uid;
|
|
struct mount *mp = NULL;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
vfslocked = 0;
|
|
#ifndef nolint
|
|
fvp = NULL;
|
|
#endif
|
|
ffhp = &fnfh.fh_generic;
|
|
tfhp = &tnfh.fh_generic;
|
|
|
|
/*
|
|
* Clear fields incase goto nfsmout occurs from macro.
|
|
*/
|
|
|
|
ndclear(&fromnd);
|
|
ndclear(&tond);
|
|
|
|
nfsm_srvmtofh(ffhp);
|
|
if ((mp = vfs_getvfs(&ffhp->fh_fsid)) == NULL) {
|
|
error = ESTALE;
|
|
goto out1;
|
|
}
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
(void) vn_start_write(NULL, &mp, V_WAIT);
|
|
vfs_rel(mp); /* The write holds a ref. */
|
|
nfsm_srvnamesiz(len);
|
|
/*
|
|
* Remember our original uid so that we can reset cr_uid before
|
|
* the second nfs_namei() call, in case it is remapped.
|
|
*/
|
|
saved_uid = cred->cr_uid;
|
|
fromnd.ni_cnd.cn_cred = cred;
|
|
fromnd.ni_cnd.cn_nameiop = DELETE;
|
|
fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART | MPSAFE;
|
|
error = nfs_namei(&fromnd, nfsd, ffhp, len, slp, nam, &md,
|
|
&dpos, &fdirp, v3, &fdirfor, &fdirfor_ret, FALSE);
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &fromnd);
|
|
if (fdirp && !v3) {
|
|
vrele(fdirp);
|
|
fdirp = NULL;
|
|
}
|
|
if (error) {
|
|
nfsm_reply(2 * NFSX_WCCDATA(v3));
|
|
if (v3) {
|
|
nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft);
|
|
nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft);
|
|
}
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
fvp = fromnd.ni_vp;
|
|
nfsm_srvmtofh(tfhp);
|
|
nfsm_srvnamesiz(len2);
|
|
cred->cr_uid = saved_uid;
|
|
tond.ni_cnd.cn_cred = cred;
|
|
tond.ni_cnd.cn_nameiop = RENAME;
|
|
tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART | MPSAFE;
|
|
error = nfs_namei(&tond, nfsd, tfhp, len2, slp, nam, &md,
|
|
&dpos, &tdirp, v3, &tdirfor, &tdirfor_ret, FALSE);
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &tond);
|
|
if (tdirp && !v3) {
|
|
vrele(tdirp);
|
|
tdirp = NULL;
|
|
}
|
|
if (error)
|
|
goto out1;
|
|
|
|
tdvp = tond.ni_dvp;
|
|
tvp = tond.ni_vp;
|
|
if (tvp != NULL) {
|
|
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
|
|
if (v3)
|
|
error = EEXIST;
|
|
else
|
|
error = EISDIR;
|
|
goto out;
|
|
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
|
|
if (v3)
|
|
error = EEXIST;
|
|
else
|
|
error = ENOTDIR;
|
|
goto out;
|
|
}
|
|
if (tvp->v_type == VDIR && tvp->v_mountedhere) {
|
|
if (v3)
|
|
error = EXDEV;
|
|
else
|
|
error = ENOTEMPTY;
|
|
goto out;
|
|
}
|
|
}
|
|
if (fvp->v_type == VDIR && fvp->v_mountedhere) {
|
|
if (v3)
|
|
error = EXDEV;
|
|
else
|
|
error = ENOTEMPTY;
|
|
goto out;
|
|
}
|
|
if (fvp->v_mount != tdvp->v_mount) {
|
|
if (v3)
|
|
error = EXDEV;
|
|
else
|
|
error = ENOTEMPTY;
|
|
goto out;
|
|
}
|
|
if (fvp == tdvp) {
|
|
if (v3)
|
|
error = EINVAL;
|
|
else
|
|
error = ENOTEMPTY;
|
|
}
|
|
/*
|
|
* If source is the same as the destination (that is the
|
|
* same vnode with the same name in the same directory),
|
|
* then there is nothing to do.
|
|
*/
|
|
if (fvp == tvp && fromnd.ni_dvp == tdvp &&
|
|
fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&
|
|
!bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr,
|
|
fromnd.ni_cnd.cn_namelen))
|
|
error = -1;
|
|
out:
|
|
if (!error) {
|
|
/*
|
|
* The VOP_RENAME function releases all vnode references &
|
|
* locks prior to returning so we need to clear the pointers
|
|
* to bypass cleanup code later on.
|
|
*/
|
|
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
|
|
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
|
|
fromnd.ni_dvp = NULL;
|
|
fromnd.ni_vp = NULL;
|
|
tond.ni_dvp = NULL;
|
|
tond.ni_vp = NULL;
|
|
if (error) {
|
|
NDFREE(&fromnd, NDF_ONLY_PNBUF);
|
|
NDFREE(&tond, NDF_ONLY_PNBUF);
|
|
}
|
|
} else {
|
|
if (error == -1)
|
|
error = 0;
|
|
}
|
|
/* fall through */
|
|
out1:
|
|
nfsm_reply(2 * NFSX_WCCDATA(v3));
|
|
if (v3) {
|
|
/* Release existing locks to prevent deadlock. */
|
|
if (tond.ni_dvp) {
|
|
if (tond.ni_dvp == tond.ni_vp)
|
|
vrele(tond.ni_dvp);
|
|
else
|
|
vput(tond.ni_dvp);
|
|
}
|
|
if (tond.ni_vp)
|
|
vput(tond.ni_vp);
|
|
tond.ni_dvp = NULL;
|
|
tond.ni_vp = NULL;
|
|
|
|
if (fdirp) {
|
|
vn_lock(fdirp, LK_EXCLUSIVE | LK_RETRY);
|
|
fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft, cred);
|
|
VOP_UNLOCK(fdirp, 0);
|
|
}
|
|
if (tdirp) {
|
|
vn_lock(tdirp, LK_EXCLUSIVE | LK_RETRY);
|
|
tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft, cred);
|
|
VOP_UNLOCK(tdirp, 0);
|
|
}
|
|
nfsm_srvwcc_data(fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft);
|
|
nfsm_srvwcc_data(tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft);
|
|
}
|
|
error = 0;
|
|
/* fall through */
|
|
|
|
nfsmout:
|
|
/*
|
|
* Clear out tond related fields
|
|
*/
|
|
if (tond.ni_dvp) {
|
|
if (tond.ni_dvp == tond.ni_vp)
|
|
vrele(tond.ni_dvp);
|
|
else
|
|
vput(tond.ni_dvp);
|
|
}
|
|
if (tond.ni_vp)
|
|
vput(tond.ni_vp);
|
|
if (tdirp)
|
|
vrele(tdirp);
|
|
if (tond.ni_startdir)
|
|
vrele(tond.ni_startdir);
|
|
NDFREE(&tond, NDF_ONLY_PNBUF);
|
|
/*
|
|
* Clear out fromnd related fields
|
|
*/
|
|
if (fdirp)
|
|
vrele(fdirp);
|
|
if (fromnd.ni_startdir)
|
|
vrele(fromnd.ni_startdir);
|
|
NDFREE(&fromnd, NDF_ONLY_PNBUF);
|
|
if (fromnd.ni_dvp)
|
|
vrele(fromnd.ni_dvp);
|
|
if (fromnd.ni_vp)
|
|
vrele(fromnd.ni_vp);
|
|
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs link service
|
|
*/
|
|
int
|
|
nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct nameidata nd;
|
|
caddr_t bpos;
|
|
int error = 0, rdonly, len, dirfor_ret = 1, diraft_ret = 1;
|
|
int getret = 1, v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
struct mbuf *mb, *mreq;
|
|
struct vnode *vp = NULL, *xp, *dirp = NULL;
|
|
struct vattr dirfor, diraft, at;
|
|
nfsfh_t nfh, dnfh;
|
|
fhandle_t *fhp, *dfhp;
|
|
struct mount *mp = NULL;
|
|
int tvfslocked;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
ndclear(&nd);
|
|
vfslocked = 0;
|
|
|
|
fhp = &nfh.fh_generic;
|
|
dfhp = &dnfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) {
|
|
error = ESTALE;
|
|
goto ereply;
|
|
}
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
(void) vn_start_write(NULL, &mp, V_WAIT);
|
|
vfs_rel(mp); /* The write holds a ref. */
|
|
nfsm_srvmtofh(dfhp);
|
|
nfsm_srvnamesiz(len);
|
|
|
|
error = nfsrv_fhtovp(fhp, TRUE, &vp, &tvfslocked, nfsd, slp,
|
|
nam, &rdonly, TRUE);
|
|
vfslocked = nfsrv_lockedpair(vfslocked, tvfslocked);
|
|
if (error) {
|
|
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
|
|
if (v3) {
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
|
|
}
|
|
vp = NULL;
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
if (v3)
|
|
getret = VOP_GETATTR(vp, &at, cred);
|
|
if (vp->v_type == VDIR) {
|
|
error = EPERM; /* POSIX */
|
|
goto out1;
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
nd.ni_cnd.cn_cred = cred;
|
|
nd.ni_cnd.cn_nameiop = CREATE;
|
|
nd.ni_cnd.cn_flags = LOCKPARENT | MPSAFE | MPSAFE;
|
|
error = nfs_namei(&nd, nfsd, dfhp, len, slp, nam, &md, &dpos,
|
|
&dirp, v3, &dirfor, &dirfor_ret, FALSE);
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &nd);
|
|
if (dirp && !v3) {
|
|
vrele(dirp);
|
|
dirp = NULL;
|
|
}
|
|
if (error) {
|
|
vrele(vp);
|
|
vp = NULL;
|
|
goto out2;
|
|
}
|
|
xp = nd.ni_vp;
|
|
if (xp != NULL) {
|
|
error = EEXIST;
|
|
vrele(vp);
|
|
vp = NULL;
|
|
goto out2;
|
|
}
|
|
xp = nd.ni_dvp;
|
|
if (vp->v_mount != xp->v_mount) {
|
|
error = EXDEV;
|
|
vrele(vp);
|
|
vp = NULL;
|
|
goto out2;
|
|
}
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
/* fall through */
|
|
|
|
out1:
|
|
if (v3)
|
|
getret = VOP_GETATTR(vp, &at, cred);
|
|
out2:
|
|
if (dirp) {
|
|
if (dirp == nd.ni_dvp)
|
|
diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
|
|
else {
|
|
/* Release existing locks to prevent deadlock. */
|
|
if (nd.ni_dvp) {
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
nd.ni_dvp = NULL;
|
|
nd.ni_vp = NULL;
|
|
|
|
vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY);
|
|
diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
|
|
VOP_UNLOCK(dirp, 0);
|
|
}
|
|
}
|
|
ereply:
|
|
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
|
|
if (v3) {
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
|
|
}
|
|
error = 0;
|
|
/* fall through */
|
|
|
|
nfsmout:
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (vp)
|
|
vput(vp);
|
|
if (nd.ni_dvp) {
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
if (dirp)
|
|
vrele(dirp);
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* nfs symbolic link service
|
|
*/
|
|
int
|
|
nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct vattr va, dirfor, diraft;
|
|
struct nameidata nd;
|
|
struct vattr *vap = &va;
|
|
struct nfsv2_sattr *sp;
|
|
char *bpos, *pathcp = NULL;
|
|
struct uio io;
|
|
struct iovec iv;
|
|
int error = 0, len, len2, dirfor_ret = 1, diraft_ret = 1;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
struct mbuf *mb, *mreq;
|
|
struct vnode *dirp = NULL;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
struct mount *mp = NULL;
|
|
int tvfslocked;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
ndclear(&nd);
|
|
vfslocked = 0;
|
|
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) {
|
|
error = ESTALE;
|
|
goto out;
|
|
}
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
(void) vn_start_write(NULL, &mp, V_WAIT);
|
|
vfs_rel(mp); /* The write holds a ref. */
|
|
nfsm_srvnamesiz(len);
|
|
nd.ni_cnd.cn_cred = cred;
|
|
nd.ni_cnd.cn_nameiop = CREATE;
|
|
nd.ni_cnd.cn_flags = LOCKPARENT | SAVESTART | MPSAFE;
|
|
error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos,
|
|
&dirp, v3, &dirfor, &dirfor_ret, FALSE);
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &nd);
|
|
if (error == 0) {
|
|
VATTR_NULL(vap);
|
|
if (v3)
|
|
nfsm_srvsattr(vap);
|
|
nfsm_srvpathsiz(len2);
|
|
}
|
|
if (dirp && !v3) {
|
|
vrele(dirp);
|
|
dirp = NULL;
|
|
}
|
|
if (error)
|
|
goto out;
|
|
pathcp = malloc(len2 + 1, M_TEMP, M_WAITOK);
|
|
iv.iov_base = pathcp;
|
|
iv.iov_len = len2;
|
|
io.uio_resid = len2;
|
|
io.uio_offset = 0;
|
|
io.uio_iov = &iv;
|
|
io.uio_iovcnt = 1;
|
|
io.uio_segflg = UIO_SYSSPACE;
|
|
io.uio_rw = UIO_READ;
|
|
io.uio_td = NULL;
|
|
nfsm_mtouio(&io, len2);
|
|
if (!v3) {
|
|
sp = nfsm_dissect_nonblock(struct nfsv2_sattr *, NFSX_V2SATTR);
|
|
vap->va_mode = nfstov_mode(sp->sa_mode);
|
|
}
|
|
*(pathcp + len2) = '\0';
|
|
if (nd.ni_vp) {
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* issue symlink op. SAVESTART is set so the underlying path component
|
|
* is only freed by the VOP if an error occurs.
|
|
*/
|
|
if (vap->va_mode == (mode_t)VNOVAL)
|
|
vap->va_mode = 0;
|
|
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap, pathcp);
|
|
if (error)
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
else
|
|
vput(nd.ni_vp);
|
|
nd.ni_vp = NULL;
|
|
/*
|
|
* releases directory prior to potential lookup op.
|
|
*/
|
|
vput(nd.ni_dvp);
|
|
nd.ni_dvp = NULL;
|
|
|
|
if (error == 0) {
|
|
if (v3) {
|
|
/*
|
|
* Issue lookup. Leave SAVESTART set so we can easily free
|
|
* the name buffer later on.
|
|
*
|
|
* since LOCKPARENT is not set, ni_dvp will be garbage on
|
|
* return whether an error occurs or not.
|
|
*/
|
|
nd.ni_cnd.cn_nameiop = LOOKUP;
|
|
nd.ni_cnd.cn_flags &= ~(LOCKPARENT | FOLLOW);
|
|
nd.ni_cnd.cn_flags |= (NOFOLLOW | LOCKLEAF);
|
|
nd.ni_cnd.cn_thread = curthread;
|
|
nd.ni_cnd.cn_cred = cred;
|
|
tvfslocked = VFS_LOCK_GIANT(nd.ni_startdir->v_mount);
|
|
if (tvfslocked)
|
|
nd.ni_cnd.cn_flags |= GIANTHELD;
|
|
error = lookup(&nd);
|
|
nd.ni_dvp = NULL;
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &nd);
|
|
nd.ni_cnd.cn_flags &= ~GIANTHELD;
|
|
|
|
if (error == 0) {
|
|
bzero((caddr_t)fhp, sizeof(nfh));
|
|
fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid;
|
|
error = VOP_VPTOFH(nd.ni_vp, &fhp->fh_fid);
|
|
if (!error)
|
|
error = VOP_GETATTR(nd.ni_vp, vap, cred);
|
|
vput(nd.ni_vp);
|
|
nd.ni_vp = NULL;
|
|
}
|
|
}
|
|
}
|
|
out:
|
|
/*
|
|
* These releases aren't strictly required, does even doing them
|
|
* make any sense? XXX can nfsm_reply() block?
|
|
*/
|
|
if (pathcp) {
|
|
free(pathcp, M_TEMP);
|
|
pathcp = NULL;
|
|
}
|
|
if (dirp) {
|
|
vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY);
|
|
diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
|
|
VOP_UNLOCK(dirp, 0);
|
|
}
|
|
if (nd.ni_startdir) {
|
|
vrele(nd.ni_startdir);
|
|
nd.ni_startdir = NULL;
|
|
}
|
|
nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
|
|
if (v3) {
|
|
if (!error) {
|
|
nfsm_srvpostop_fh(fhp);
|
|
nfsm_srvpostop_attr(0, vap);
|
|
}
|
|
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
|
|
}
|
|
error = 0;
|
|
/* fall through */
|
|
|
|
nfsmout:
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_dvp) {
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
if (nd.ni_startdir)
|
|
vrele(nd.ni_startdir);
|
|
if (dirp)
|
|
vrele(dirp);
|
|
if (pathcp)
|
|
free(pathcp, M_TEMP);
|
|
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs mkdir service
|
|
*/
|
|
int
|
|
nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct vattr va, dirfor, diraft;
|
|
struct vattr *vap = &va;
|
|
struct nfs_fattr *fp;
|
|
struct nameidata nd;
|
|
u_int32_t *tl;
|
|
caddr_t bpos;
|
|
int error = 0, len, dirfor_ret = 1, diraft_ret = 1;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
struct mbuf *mb, *mreq;
|
|
struct vnode *dirp = NULL;
|
|
int vpexcl = 0;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
struct mount *mp = NULL;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
ndclear(&nd);
|
|
vfslocked = 0;
|
|
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) {
|
|
error = ESTALE;
|
|
goto out;
|
|
}
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
(void) vn_start_write(NULL, &mp, V_WAIT);
|
|
vfs_rel(mp); /* The write holds a ref. */
|
|
nfsm_srvnamesiz(len);
|
|
nd.ni_cnd.cn_cred = cred;
|
|
nd.ni_cnd.cn_nameiop = CREATE;
|
|
nd.ni_cnd.cn_flags = LOCKPARENT | MPSAFE;
|
|
|
|
error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos,
|
|
&dirp, v3, &dirfor, &dirfor_ret, FALSE);
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &nd);
|
|
if (dirp && !v3) {
|
|
vrele(dirp);
|
|
dirp = NULL;
|
|
}
|
|
if (error) {
|
|
nfsm_reply(NFSX_WCCDATA(v3));
|
|
if (v3)
|
|
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
VATTR_NULL(vap);
|
|
if (v3) {
|
|
nfsm_srvsattr(vap);
|
|
} else {
|
|
tl = nfsm_dissect_nonblock(u_int32_t *, NFSX_UNSIGNED);
|
|
vap->va_mode = nfstov_mode(*tl++);
|
|
}
|
|
|
|
/*
|
|
* At this point nd.ni_dvp is referenced and exclusively locked and
|
|
* nd.ni_vp, if it exists, is referenced but not locked.
|
|
*/
|
|
|
|
vap->va_type = VDIR;
|
|
if (nd.ni_vp != NULL) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Issue mkdir op. Since SAVESTART is not set, the pathname
|
|
* component is freed by the VOP call. This will fill-in
|
|
* nd.ni_vp, reference, and exclusively lock it.
|
|
*/
|
|
if (vap->va_mode == (mode_t)VNOVAL)
|
|
vap->va_mode = 0;
|
|
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
vpexcl = 1;
|
|
|
|
vput(nd.ni_dvp);
|
|
nd.ni_dvp = NULL;
|
|
|
|
if (!error) {
|
|
bzero((caddr_t)fhp, sizeof(nfh));
|
|
fhp->fh_fsid = nd.ni_vp->v_mount->mnt_stat.f_fsid;
|
|
error = VOP_VPTOFH(nd.ni_vp, &fhp->fh_fid);
|
|
if (!error)
|
|
error = VOP_GETATTR(nd.ni_vp, vap, cred);
|
|
}
|
|
out:
|
|
if (dirp) {
|
|
if (dirp == nd.ni_dvp) {
|
|
diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
|
|
} else {
|
|
/* Release existing locks to prevent deadlock. */
|
|
if (nd.ni_dvp) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_dvp == nd.ni_vp && vpexcl)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
if (nd.ni_vp) {
|
|
if (vpexcl)
|
|
vput(nd.ni_vp);
|
|
else
|
|
vrele(nd.ni_vp);
|
|
}
|
|
nd.ni_dvp = NULL;
|
|
nd.ni_vp = NULL;
|
|
vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY);
|
|
diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
|
|
VOP_UNLOCK(dirp, 0);
|
|
}
|
|
}
|
|
nfsm_reply(NFSX_SRVFH(v3) + NFSX_POSTOPATTR(v3) + NFSX_WCCDATA(v3));
|
|
if (v3) {
|
|
if (!error) {
|
|
nfsm_srvpostop_fh(fhp);
|
|
nfsm_srvpostop_attr(0, vap);
|
|
}
|
|
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
|
|
} else if (!error) {
|
|
/* v2 non-error case. */
|
|
nfsm_srvfhtom(fhp, v3);
|
|
fp = nfsm_build(struct nfs_fattr *, NFSX_V2FATTR);
|
|
nfsm_srvfillattr(vap, fp);
|
|
}
|
|
error = 0;
|
|
/* fall through */
|
|
|
|
nfsmout:
|
|
if (nd.ni_dvp) {
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_dvp == nd.ni_vp && vpexcl)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
if (nd.ni_vp) {
|
|
if (vpexcl)
|
|
vput(nd.ni_vp);
|
|
else
|
|
vrele(nd.ni_vp);
|
|
}
|
|
if (dirp)
|
|
vrele(dirp);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs rmdir service
|
|
*/
|
|
int
|
|
nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
caddr_t bpos;
|
|
int error = 0, len, dirfor_ret = 1, diraft_ret = 1;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
struct mbuf *mb, *mreq;
|
|
struct vnode *vp, *dirp = NULL;
|
|
struct vattr dirfor, diraft;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
struct nameidata nd;
|
|
struct mount *mp = NULL;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
ndclear(&nd);
|
|
vfslocked = 0;
|
|
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) {
|
|
error = ESTALE;
|
|
goto out;
|
|
}
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
(void) vn_start_write(NULL, &mp, V_WAIT);
|
|
vfs_rel(mp); /* The write holds a ref. */
|
|
nfsm_srvnamesiz(len);
|
|
nd.ni_cnd.cn_cred = cred;
|
|
nd.ni_cnd.cn_nameiop = DELETE;
|
|
nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | MPSAFE;
|
|
error = nfs_namei(&nd, nfsd, fhp, len, slp, nam, &md, &dpos,
|
|
&dirp, v3, &dirfor, &dirfor_ret, FALSE);
|
|
vfslocked = nfsrv_lockedpair_nd(vfslocked, &nd);
|
|
if (dirp && !v3) {
|
|
vrele(dirp);
|
|
dirp = NULL;
|
|
}
|
|
if (error) {
|
|
nfsm_reply(NFSX_WCCDATA(v3));
|
|
if (v3)
|
|
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
goto out;
|
|
}
|
|
/*
|
|
* No rmdir "." please.
|
|
*/
|
|
if (nd.ni_dvp == vp) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*/
|
|
if (vp->v_vflag & VV_ROOT)
|
|
error = EBUSY;
|
|
out:
|
|
/*
|
|
* Issue or abort op. Since SAVESTART is not set, path name
|
|
* component is freed by the VOP after either.
|
|
*/
|
|
if (!error)
|
|
error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
|
|
if (dirp) {
|
|
if (dirp == nd.ni_dvp)
|
|
diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
|
|
else {
|
|
/* Release existing locks to prevent deadlock. */
|
|
if (nd.ni_dvp) {
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
if (nd.ni_vp)
|
|
vput(nd.ni_vp);
|
|
nd.ni_dvp = NULL;
|
|
nd.ni_vp = NULL;
|
|
vn_lock(dirp, LK_EXCLUSIVE | LK_RETRY);
|
|
diraft_ret = VOP_GETATTR(dirp, &diraft, cred);
|
|
VOP_UNLOCK(dirp, 0);
|
|
}
|
|
}
|
|
nfsm_reply(NFSX_WCCDATA(v3));
|
|
error = 0;
|
|
if (v3)
|
|
nfsm_srvwcc_data(dirfor_ret, &dirfor, diraft_ret, &diraft);
|
|
/* fall through */
|
|
|
|
nfsmout:
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
if (nd.ni_dvp) {
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
if (nd.ni_vp)
|
|
vput(nd.ni_vp);
|
|
if (dirp)
|
|
vrele(dirp);
|
|
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* nfs readdir service
|
|
* - mallocs what it thinks is enough to read
|
|
* count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR
|
|
* - calls VOP_READDIR()
|
|
* - loops around building the reply
|
|
* if the output generated exceeds count break out of loop
|
|
* The nfsm_clget macro is used here so that the reply will be packed
|
|
* tightly in mbuf clusters.
|
|
* - it only knows that it has encountered eof when the VOP_READDIR()
|
|
* reads nothing
|
|
* - as such one readdir rpc will return eof false although you are there
|
|
* and then the next will return eof
|
|
* - it trims out records with d_fileno == 0
|
|
* this doesn't matter for Unix clients, but they might confuse clients
|
|
* for other os'.
|
|
* NB: It is tempting to set eof to true if the VOP_READDIR() reads less
|
|
* than requested, but this may not apply to all filesystems. For
|
|
* example, client NFS does not { although it is never remote mounted
|
|
* anyhow }
|
|
* The alternate call nfsrv_readdirplus() does lookups as well.
|
|
* PS: The NFS protocol spec. does not clarify what the "count" byte
|
|
* argument is a count of.. just name strings and file id's or the
|
|
* entire reply rpc or ...
|
|
* I tried just file name and id sizes and it confused the Sun client,
|
|
* so I am using the full rpc size now. The "paranoia.." comment refers
|
|
* to including the status longwords that are not a part of the dir.
|
|
* "entry" structures, but are in the rpc.
|
|
*/
|
|
struct flrep {
|
|
nfsuint64 fl_off;
|
|
u_int32_t fl_postopok;
|
|
u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)];
|
|
u_int32_t fl_fhok;
|
|
u_int32_t fl_fhsize;
|
|
u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)];
|
|
};
|
|
|
|
int
|
|
nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
char *bp, *be;
|
|
struct mbuf *mp;
|
|
struct dirent *dp;
|
|
caddr_t cp;
|
|
u_int32_t *tl;
|
|
caddr_t bpos;
|
|
struct mbuf *mb, *mreq;
|
|
char *cpos, *cend, *rbuf;
|
|
struct vnode *vp = NULL;
|
|
struct vattr at;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
struct uio io;
|
|
struct iovec iv;
|
|
int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1;
|
|
int siz, cnt, fullsiz, eofflag, rdonly, ncookies;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
u_quad_t off, toff, verf;
|
|
u_long *cookies = NULL, *cookiep; /* needs to be int64_t or off_t */
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
vfslocked = 0;
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
if (v3) {
|
|
tl = nfsm_dissect_nonblock(u_int32_t *, 5 * NFSX_UNSIGNED);
|
|
toff = fxdr_hyper(tl);
|
|
tl += 2;
|
|
verf = fxdr_hyper(tl);
|
|
tl += 2;
|
|
} else {
|
|
tl = nfsm_dissect_nonblock(u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
toff = fxdr_unsigned(u_quad_t, *tl++);
|
|
verf = 0; /* shut up gcc */
|
|
}
|
|
off = toff;
|
|
cnt = fxdr_unsigned(int, *tl);
|
|
siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
|
|
xfer = NFS_SRVMAXDATA(nfsd);
|
|
if (cnt > xfer)
|
|
cnt = xfer;
|
|
if (siz > xfer)
|
|
siz = xfer;
|
|
fullsiz = siz;
|
|
error = nfsrv_fhtovp(fhp, 1, &vp, &vfslocked, nfsd, slp,
|
|
nam, &rdonly, TRUE);
|
|
if (!error && vp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
vput(vp);
|
|
vp = NULL;
|
|
}
|
|
if (error) {
|
|
nfsm_reply(NFSX_UNSIGNED);
|
|
if (v3)
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
|
|
/*
|
|
* Obtain lock on vnode for this section of the code
|
|
*/
|
|
if (v3) {
|
|
error = getret = VOP_GETATTR(vp, &at, cred);
|
|
#if 0
|
|
/*
|
|
* XXX This check may be too strict for Solaris 2.5 clients.
|
|
*/
|
|
if (!error && toff && verf && verf != at.va_filerev)
|
|
error = NFSERR_BAD_COOKIE;
|
|
#endif
|
|
}
|
|
if (!error)
|
|
error = nfsrv_access(vp, VEXEC, cred, rdonly, 0);
|
|
if (error) {
|
|
vput(vp);
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_POSTOPATTR(v3));
|
|
if (v3)
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
|
|
/*
|
|
* end section. Allocate rbuf and continue
|
|
*/
|
|
rbuf = malloc(siz, M_TEMP, M_WAITOK);
|
|
again:
|
|
iv.iov_base = rbuf;
|
|
iv.iov_len = fullsiz;
|
|
io.uio_iov = &iv;
|
|
io.uio_iovcnt = 1;
|
|
io.uio_offset = (off_t)off;
|
|
io.uio_resid = fullsiz;
|
|
io.uio_segflg = UIO_SYSSPACE;
|
|
io.uio_rw = UIO_READ;
|
|
io.uio_td = NULL;
|
|
eofflag = 0;
|
|
vn_lock(vp, LK_SHARED | LK_RETRY);
|
|
if (cookies) {
|
|
free((caddr_t)cookies, M_TEMP);
|
|
cookies = NULL;
|
|
}
|
|
error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies);
|
|
off = (off_t)io.uio_offset;
|
|
if (!cookies && !error)
|
|
error = NFSERR_PERM;
|
|
if (v3) {
|
|
getret = VOP_GETATTR(vp, &at, cred);
|
|
if (!error)
|
|
error = getret;
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
if (error) {
|
|
vrele(vp);
|
|
vp = NULL;
|
|
free((caddr_t)rbuf, M_TEMP);
|
|
if (cookies)
|
|
free((caddr_t)cookies, M_TEMP);
|
|
nfsm_reply(NFSX_POSTOPATTR(v3));
|
|
if (v3)
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
if (io.uio_resid) {
|
|
siz -= io.uio_resid;
|
|
|
|
/*
|
|
* If nothing read, return eof
|
|
* rpc reply
|
|
*/
|
|
if (siz == 0) {
|
|
vrele(vp);
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) +
|
|
2 * NFSX_UNSIGNED);
|
|
if (v3) {
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
tl = nfsm_build(u_int32_t *, 4 * NFSX_UNSIGNED);
|
|
txdr_hyper(at.va_filerev, tl);
|
|
tl += 2;
|
|
} else
|
|
tl = nfsm_build(u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
*tl++ = nfsrv_nfs_false;
|
|
*tl = nfsrv_nfs_true;
|
|
free((caddr_t)rbuf, M_TEMP);
|
|
free((caddr_t)cookies, M_TEMP);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check for degenerate cases of nothing useful read.
|
|
* If so go try again
|
|
*/
|
|
cpos = rbuf;
|
|
cend = rbuf + siz;
|
|
dp = (struct dirent *)cpos;
|
|
cookiep = cookies;
|
|
/*
|
|
* For some reason FreeBSD's ufs_readdir() chooses to back the
|
|
* directory offset up to a block boundary, so it is necessary to
|
|
* skip over the records that precede the requested offset. This
|
|
* requires the assumption that file offset cookies monotonically
|
|
* increase.
|
|
*/
|
|
while (cpos < cend && ncookies > 0 &&
|
|
(dp->d_fileno == 0 || dp->d_type == DT_WHT ||
|
|
((u_quad_t)(*cookiep)) <= toff)) {
|
|
cpos += dp->d_reclen;
|
|
dp = (struct dirent *)cpos;
|
|
cookiep++;
|
|
ncookies--;
|
|
}
|
|
if (cpos >= cend || ncookies == 0) {
|
|
toff = off;
|
|
siz = fullsiz;
|
|
goto again;
|
|
}
|
|
|
|
len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */
|
|
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_COOKIEVERF(v3) + siz);
|
|
if (v3) {
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
tl = nfsm_build(u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
txdr_hyper(at.va_filerev, tl);
|
|
}
|
|
mp = mb;
|
|
bp = bpos;
|
|
be = bp + M_TRAILINGSPACE(mp);
|
|
|
|
/* Loop through the records and build reply */
|
|
while (cpos < cend && ncookies > 0) {
|
|
if (dp->d_fileno != 0 && dp->d_type != DT_WHT) {
|
|
nlen = dp->d_namlen;
|
|
rem = nfsm_rndup(nlen) - nlen;
|
|
len += (4 * NFSX_UNSIGNED + nlen + rem);
|
|
if (v3)
|
|
len += 2 * NFSX_UNSIGNED;
|
|
if (len > cnt) {
|
|
eofflag = 0;
|
|
break;
|
|
}
|
|
/*
|
|
* Build the directory record xdr from
|
|
* the dirent entry.
|
|
*/
|
|
nfsm_clget;
|
|
*tl = nfsrv_nfs_true;
|
|
bp += NFSX_UNSIGNED;
|
|
if (v3) {
|
|
nfsm_clget;
|
|
*tl = 0;
|
|
bp += NFSX_UNSIGNED;
|
|
}
|
|
nfsm_clget;
|
|
*tl = txdr_unsigned(dp->d_fileno);
|
|
bp += NFSX_UNSIGNED;
|
|
nfsm_clget;
|
|
*tl = txdr_unsigned(nlen);
|
|
bp += NFSX_UNSIGNED;
|
|
|
|
/* And loop around copying the name */
|
|
xfer = nlen;
|
|
cp = dp->d_name;
|
|
while (xfer > 0) {
|
|
nfsm_clget;
|
|
if ((bp+xfer) > be)
|
|
tsiz = be-bp;
|
|
else
|
|
tsiz = xfer;
|
|
bcopy(cp, bp, tsiz);
|
|
bp += tsiz;
|
|
xfer -= tsiz;
|
|
if (xfer > 0)
|
|
cp += tsiz;
|
|
}
|
|
/* And null pad to an int32_t boundary. */
|
|
for (i = 0; i < rem; i++)
|
|
*bp++ = '\0';
|
|
nfsm_clget;
|
|
|
|
/* Finish off the record */
|
|
if (v3) {
|
|
*tl = 0;
|
|
bp += NFSX_UNSIGNED;
|
|
nfsm_clget;
|
|
}
|
|
*tl = txdr_unsigned(*cookiep);
|
|
bp += NFSX_UNSIGNED;
|
|
}
|
|
cpos += dp->d_reclen;
|
|
dp = (struct dirent *)cpos;
|
|
cookiep++;
|
|
ncookies--;
|
|
}
|
|
vrele(vp);
|
|
vp = NULL;
|
|
nfsm_clget;
|
|
*tl = nfsrv_nfs_false;
|
|
bp += NFSX_UNSIGNED;
|
|
nfsm_clget;
|
|
if (eofflag)
|
|
*tl = nfsrv_nfs_true;
|
|
else
|
|
*tl = nfsrv_nfs_false;
|
|
bp += NFSX_UNSIGNED;
|
|
if (mp != mb) {
|
|
if (bp < be)
|
|
mp->m_len = bp - mtod(mp, caddr_t);
|
|
} else
|
|
mp->m_len += bp - bpos;
|
|
free((caddr_t)rbuf, M_TEMP);
|
|
free((caddr_t)cookies, M_TEMP);
|
|
|
|
nfsmout:
|
|
if (vp)
|
|
vrele(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
int
|
|
nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
char *bp, *be;
|
|
struct mbuf *mp;
|
|
struct dirent *dp;
|
|
caddr_t cp;
|
|
u_int32_t *tl;
|
|
caddr_t bpos;
|
|
struct mbuf *mb, *mreq;
|
|
char *cpos, *cend, *rbuf;
|
|
struct vnode *vp = NULL, *nvp;
|
|
struct flrep fl;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh;
|
|
struct uio io;
|
|
struct iovec iv;
|
|
struct vattr va, at, *vap = &va;
|
|
struct nfs_fattr *fp;
|
|
int len, nlen, rem, xfer, tsiz, i, error = 0, error1, getret = 1;
|
|
int vp_locked;
|
|
int siz, cnt, fullsiz, eofflag, rdonly, dirlen, ncookies;
|
|
u_quad_t off, toff, verf;
|
|
u_long *cookies = NULL, *cookiep; /* needs to be int64_t or off_t */
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
int usevget = 1, vfslocked;
|
|
struct componentname cn;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
vfslocked = 0;
|
|
if (!v3)
|
|
panic("nfsrv_readdirplus: v3 proc called on a v2 connection");
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
tl = nfsm_dissect_nonblock(u_int32_t *, 6 * NFSX_UNSIGNED);
|
|
toff = fxdr_hyper(tl);
|
|
tl += 2;
|
|
verf = fxdr_hyper(tl);
|
|
tl += 2;
|
|
siz = fxdr_unsigned(int, *tl++);
|
|
cnt = fxdr_unsigned(int, *tl);
|
|
off = toff;
|
|
siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1));
|
|
xfer = NFS_SRVMAXDATA(nfsd);
|
|
if (cnt > xfer)
|
|
cnt = xfer;
|
|
if (siz > xfer)
|
|
siz = xfer;
|
|
fullsiz = siz;
|
|
error = nfsrv_fhtovp(fhp, 1, &vp, &vfslocked, nfsd, slp,
|
|
nam, &rdonly, TRUE);
|
|
vp_locked = 1;
|
|
if (!error && vp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
vput(vp);
|
|
vp = NULL;
|
|
vp_locked = 0;
|
|
}
|
|
if (error) {
|
|
nfsm_reply(NFSX_UNSIGNED);
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
error = getret = VOP_GETATTR(vp, &at, cred);
|
|
#if 0
|
|
/*
|
|
* XXX This check may be too strict for Solaris 2.5 clients.
|
|
*/
|
|
if (!error && toff && verf && verf != at.va_filerev)
|
|
error = NFSERR_BAD_COOKIE;
|
|
#endif
|
|
if (!error)
|
|
error = nfsrv_access(vp, VEXEC, cred, rdonly, 0);
|
|
if (error) {
|
|
vput(vp);
|
|
vp_locked = 0;
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_V3POSTOPATTR);
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
VOP_UNLOCK(vp, 0);
|
|
vp_locked = 0;
|
|
rbuf = malloc(siz, M_TEMP, M_WAITOK);
|
|
again:
|
|
iv.iov_base = rbuf;
|
|
iv.iov_len = fullsiz;
|
|
io.uio_iov = &iv;
|
|
io.uio_iovcnt = 1;
|
|
io.uio_offset = (off_t)off;
|
|
io.uio_resid = fullsiz;
|
|
io.uio_segflg = UIO_SYSSPACE;
|
|
io.uio_rw = UIO_READ;
|
|
io.uio_td = NULL;
|
|
eofflag = 0;
|
|
vn_lock(vp, LK_SHARED | LK_RETRY);
|
|
vp_locked = 1;
|
|
if (cookies) {
|
|
free((caddr_t)cookies, M_TEMP);
|
|
cookies = NULL;
|
|
}
|
|
error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies);
|
|
off = (u_quad_t)io.uio_offset;
|
|
getret = VOP_GETATTR(vp, &at, cred);
|
|
VOP_UNLOCK(vp, 0);
|
|
vp_locked = 0;
|
|
if (!cookies && !error)
|
|
error = NFSERR_PERM;
|
|
if (!error)
|
|
error = getret;
|
|
if (error) {
|
|
vrele(vp);
|
|
vp = NULL;
|
|
if (cookies)
|
|
free((caddr_t)cookies, M_TEMP);
|
|
free((caddr_t)rbuf, M_TEMP);
|
|
nfsm_reply(NFSX_V3POSTOPATTR);
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
if (io.uio_resid) {
|
|
siz -= io.uio_resid;
|
|
|
|
/*
|
|
* If nothing read, return eof
|
|
* rpc reply
|
|
*/
|
|
if (siz == 0) {
|
|
vrele(vp);
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF +
|
|
2 * NFSX_UNSIGNED);
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
tl = nfsm_build(u_int32_t *, 4 * NFSX_UNSIGNED);
|
|
txdr_hyper(at.va_filerev, tl);
|
|
tl += 2;
|
|
*tl++ = nfsrv_nfs_false;
|
|
*tl = nfsrv_nfs_true;
|
|
free((caddr_t)cookies, M_TEMP);
|
|
free((caddr_t)rbuf, M_TEMP);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check for degenerate cases of nothing useful read.
|
|
* If so go try again
|
|
*/
|
|
cpos = rbuf;
|
|
cend = rbuf + siz;
|
|
dp = (struct dirent *)cpos;
|
|
cookiep = cookies;
|
|
/*
|
|
* For some reason FreeBSD's ufs_readdir() chooses to back the
|
|
* directory offset up to a block boundary, so it is necessary to
|
|
* skip over the records that precede the requested offset. This
|
|
* requires the assumption that file offset cookies monotonically
|
|
* increase.
|
|
*/
|
|
while (cpos < cend && ncookies > 0 &&
|
|
(dp->d_fileno == 0 || dp->d_type == DT_WHT ||
|
|
((u_quad_t)(*cookiep)) <= toff)) {
|
|
cpos += dp->d_reclen;
|
|
dp = (struct dirent *)cpos;
|
|
cookiep++;
|
|
ncookies--;
|
|
}
|
|
if (cpos >= cend || ncookies == 0) {
|
|
toff = off;
|
|
siz = fullsiz;
|
|
goto again;
|
|
}
|
|
|
|
dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF +
|
|
2 * NFSX_UNSIGNED;
|
|
nfsm_reply(cnt);
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
tl = nfsm_build(u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
txdr_hyper(at.va_filerev, tl);
|
|
mp = mb;
|
|
bp = bpos;
|
|
be = bp + M_TRAILINGSPACE(mp);
|
|
|
|
/* Loop through the records and build reply */
|
|
while (cpos < cend && ncookies > 0) {
|
|
if (dp->d_fileno != 0 && dp->d_type != DT_WHT) {
|
|
nlen = dp->d_namlen;
|
|
rem = nfsm_rndup(nlen)-nlen;
|
|
|
|
if (usevget) {
|
|
/*
|
|
* For readdir_and_lookup get the vnode using
|
|
* the file number.
|
|
*/
|
|
error = VFS_VGET(vp->v_mount, dp->d_fileno,
|
|
LK_SHARED, &nvp);
|
|
if (error != 0 && error != EOPNOTSUPP) {
|
|
error = 0;
|
|
goto invalid;
|
|
} else if (error == EOPNOTSUPP) {
|
|
/*
|
|
* VFS_VGET() not supported?
|
|
* Let's switch to VOP_LOOKUP().
|
|
*/
|
|
error = 0;
|
|
usevget = 0;
|
|
cn.cn_nameiop = LOOKUP;
|
|
cn.cn_flags = ISLASTCN | NOFOLLOW | \
|
|
LOCKSHARED | LOCKLEAF | MPSAFE;
|
|
cn.cn_lkflags = LK_SHARED | LK_RETRY;
|
|
cn.cn_cred = cred;
|
|
cn.cn_thread = curthread;
|
|
}
|
|
}
|
|
if (!usevget) {
|
|
cn.cn_nameptr = dp->d_name;
|
|
cn.cn_namelen = dp->d_namlen;
|
|
if (dp->d_namlen == 2 &&
|
|
dp->d_name[0] == '.' &&
|
|
dp->d_name[1] == '.') {
|
|
cn.cn_flags |= ISDOTDOT;
|
|
} else {
|
|
cn.cn_flags &= ~ISDOTDOT;
|
|
}
|
|
if (!vp_locked) {
|
|
vn_lock(vp, LK_SHARED | LK_RETRY);
|
|
vp_locked = 1;
|
|
}
|
|
if ((vp->v_vflag & VV_ROOT) != 0 &&
|
|
(cn.cn_flags & ISDOTDOT) != 0) {
|
|
vref(vp);
|
|
nvp = vp;
|
|
} else if (VOP_LOOKUP(vp, &nvp, &cn) != 0)
|
|
goto invalid;
|
|
}
|
|
|
|
bzero((caddr_t)nfhp, NFSX_V3FH);
|
|
nfhp->fh_fsid = nvp->v_mount->mnt_stat.f_fsid;
|
|
if ((error1 = VOP_VPTOFH(nvp, &nfhp->fh_fid)) == 0)
|
|
error1 = VOP_GETATTR(nvp, vap, cred);
|
|
if (!usevget && vp == nvp)
|
|
vunref(nvp);
|
|
else
|
|
vput(nvp);
|
|
nvp = NULL;
|
|
if (error1 != 0)
|
|
goto invalid;
|
|
|
|
/*
|
|
* If either the dircount or maxcount will be
|
|
* exceeded, get out now. Both of these lengths
|
|
* are calculated conservatively, including all
|
|
* XDR overheads.
|
|
*/
|
|
len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH +
|
|
NFSX_V3POSTOPATTR);
|
|
dirlen += (6 * NFSX_UNSIGNED + nlen + rem);
|
|
if (len > cnt || dirlen > fullsiz) {
|
|
eofflag = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Build the directory record xdr from
|
|
* the dirent entry.
|
|
*/
|
|
fp = (struct nfs_fattr *)&fl.fl_fattr;
|
|
nfsm_srvfillattr(vap, fp);
|
|
fl.fl_fhsize = txdr_unsigned(NFSX_V3FH);
|
|
fl.fl_fhok = nfsrv_nfs_true;
|
|
fl.fl_postopok = nfsrv_nfs_true;
|
|
fl.fl_off.nfsuquad[0] = 0;
|
|
fl.fl_off.nfsuquad[1] = txdr_unsigned(*cookiep);
|
|
|
|
nfsm_clget;
|
|
*tl = nfsrv_nfs_true;
|
|
bp += NFSX_UNSIGNED;
|
|
nfsm_clget;
|
|
*tl = 0;
|
|
bp += NFSX_UNSIGNED;
|
|
nfsm_clget;
|
|
*tl = txdr_unsigned(dp->d_fileno);
|
|
bp += NFSX_UNSIGNED;
|
|
nfsm_clget;
|
|
*tl = txdr_unsigned(nlen);
|
|
bp += NFSX_UNSIGNED;
|
|
|
|
/* And loop around copying the name */
|
|
xfer = nlen;
|
|
cp = dp->d_name;
|
|
while (xfer > 0) {
|
|
nfsm_clget;
|
|
if ((bp + xfer) > be)
|
|
tsiz = be - bp;
|
|
else
|
|
tsiz = xfer;
|
|
bcopy(cp, bp, tsiz);
|
|
bp += tsiz;
|
|
xfer -= tsiz;
|
|
if (xfer > 0)
|
|
cp += tsiz;
|
|
}
|
|
/* And null pad to an int32_t boundary. */
|
|
for (i = 0; i < rem; i++)
|
|
*bp++ = '\0';
|
|
|
|
/*
|
|
* Now copy the flrep structure out.
|
|
*/
|
|
xfer = sizeof (struct flrep);
|
|
cp = (caddr_t)&fl;
|
|
while (xfer > 0) {
|
|
nfsm_clget;
|
|
if ((bp + xfer) > be)
|
|
tsiz = be - bp;
|
|
else
|
|
tsiz = xfer;
|
|
bcopy(cp, bp, tsiz);
|
|
bp += tsiz;
|
|
xfer -= tsiz;
|
|
if (xfer > 0)
|
|
cp += tsiz;
|
|
}
|
|
}
|
|
invalid:
|
|
cpos += dp->d_reclen;
|
|
dp = (struct dirent *)cpos;
|
|
cookiep++;
|
|
ncookies--;
|
|
}
|
|
if (!usevget && vp_locked)
|
|
vput(vp);
|
|
else
|
|
vrele(vp);
|
|
vp = NULL;
|
|
nfsm_clget;
|
|
*tl = nfsrv_nfs_false;
|
|
bp += NFSX_UNSIGNED;
|
|
nfsm_clget;
|
|
if (eofflag)
|
|
*tl = nfsrv_nfs_true;
|
|
else
|
|
*tl = nfsrv_nfs_false;
|
|
bp += NFSX_UNSIGNED;
|
|
if (mp != mb) {
|
|
if (bp < be)
|
|
mp->m_len = bp - mtod(mp, caddr_t);
|
|
} else
|
|
mp->m_len += bp - bpos;
|
|
free((caddr_t)cookies, M_TEMP);
|
|
free((caddr_t)rbuf, M_TEMP);
|
|
nfsmout:
|
|
if (vp)
|
|
vrele(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* nfs commit service
|
|
*/
|
|
int
|
|
nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct vattr bfor, aft;
|
|
struct vnode *vp = NULL;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
u_int32_t *tl;
|
|
caddr_t bpos;
|
|
int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt;
|
|
struct mbuf *mb, *mreq;
|
|
u_quad_t off;
|
|
struct mount *mp = NULL;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
int tvfslocked;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
vfslocked = 0;
|
|
if (!v3)
|
|
panic("nfsrv_commit: v3 proc called on a v2 connection");
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
if ((mp = vfs_getvfs(&fhp->fh_fsid)) == NULL) {
|
|
error = ESTALE;
|
|
goto ereply;
|
|
}
|
|
vfslocked = VFS_LOCK_GIANT(mp);
|
|
(void) vn_start_write(NULL, &mp, V_WAIT);
|
|
vfs_rel(mp); /* The write holds a ref. */
|
|
tl = nfsm_dissect_nonblock(u_int32_t *, 3 * NFSX_UNSIGNED);
|
|
|
|
/*
|
|
* XXX At this time VOP_FSYNC() does not accept offset and byte
|
|
* count parameters, so these arguments are useless (someday maybe).
|
|
*/
|
|
off = fxdr_hyper(tl);
|
|
tl += 2;
|
|
cnt = fxdr_unsigned(int, *tl);
|
|
error = nfsrv_fhtovp(fhp, 1, &vp, &tvfslocked, nfsd, slp,
|
|
nam, &rdonly, TRUE);
|
|
vfslocked = nfsrv_lockedpair(vfslocked, tvfslocked);
|
|
if (error) {
|
|
nfsm_reply(2 * NFSX_UNSIGNED);
|
|
nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
for_ret = VOP_GETATTR(vp, &bfor, cred);
|
|
|
|
if (cnt > MAX_COMMIT_COUNT) {
|
|
/*
|
|
* Give up and do the whole thing
|
|
*/
|
|
if (vp->v_object &&
|
|
(vp->v_object->flags & OBJ_MIGHTBEDIRTY)) {
|
|
VM_OBJECT_LOCK(vp->v_object);
|
|
vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC);
|
|
VM_OBJECT_UNLOCK(vp->v_object);
|
|
}
|
|
error = VOP_FSYNC(vp, MNT_WAIT, curthread);
|
|
} else {
|
|
/*
|
|
* Locate and synchronously write any buffers that fall
|
|
* into the requested range. Note: we are assuming that
|
|
* f_iosize is a power of 2.
|
|
*/
|
|
int iosize = vp->v_mount->mnt_stat.f_iosize;
|
|
int iomask = iosize - 1;
|
|
struct bufobj *bo;
|
|
daddr_t lblkno;
|
|
|
|
/*
|
|
* Align to iosize boundry, super-align to page boundry.
|
|
*/
|
|
if (off & iomask) {
|
|
cnt += off & iomask;
|
|
off &= ~(u_quad_t)iomask;
|
|
}
|
|
if (off & PAGE_MASK) {
|
|
cnt += off & PAGE_MASK;
|
|
off &= ~(u_quad_t)PAGE_MASK;
|
|
}
|
|
lblkno = off / iosize;
|
|
|
|
if (vp->v_object &&
|
|
(vp->v_object->flags & OBJ_MIGHTBEDIRTY)) {
|
|
VM_OBJECT_LOCK(vp->v_object);
|
|
vm_object_page_clean(vp->v_object, off / PAGE_SIZE, (cnt + PAGE_MASK) / PAGE_SIZE, OBJPC_SYNC);
|
|
VM_OBJECT_UNLOCK(vp->v_object);
|
|
}
|
|
|
|
bo = &vp->v_bufobj;
|
|
BO_LOCK(bo);
|
|
while (cnt > 0) {
|
|
struct buf *bp;
|
|
|
|
/*
|
|
* If we have a buffer and it is marked B_DELWRI we
|
|
* have to lock and write it. Otherwise the prior
|
|
* write is assumed to have already been committed.
|
|
*
|
|
* gbincore() can return invalid buffers now so we
|
|
* have to check that bit as well (though B_DELWRI
|
|
* should not be set if B_INVAL is set there could be
|
|
* a race here since we haven't locked the buffer).
|
|
*/
|
|
if ((bp = gbincore(&vp->v_bufobj, lblkno)) != NULL) {
|
|
if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL |
|
|
LK_INTERLOCK, BO_MTX(bo)) == ENOLCK) {
|
|
BO_LOCK(bo);
|
|
continue; /* retry */
|
|
}
|
|
if ((bp->b_flags & (B_DELWRI|B_INVAL)) ==
|
|
B_DELWRI) {
|
|
bremfree(bp);
|
|
bp->b_flags &= ~B_ASYNC;
|
|
bwrite(bp);
|
|
++nfs_commit_miss;
|
|
} else
|
|
BUF_UNLOCK(bp);
|
|
BO_LOCK(bo);
|
|
}
|
|
++nfs_commit_blks;
|
|
if (cnt < iosize)
|
|
break;
|
|
cnt -= iosize;
|
|
++lblkno;
|
|
}
|
|
BO_UNLOCK(bo);
|
|
}
|
|
|
|
aft_ret = VOP_GETATTR(vp, &aft, cred);
|
|
vput(vp);
|
|
vp = NULL;
|
|
ereply:
|
|
nfsm_reply(NFSX_V3WCCDATA + NFSX_V3WRITEVERF);
|
|
nfsm_srvwcc_data(for_ret, &bfor, aft_ret, &aft);
|
|
if (!error) {
|
|
tl = nfsm_build(u_int32_t *, NFSX_V3WRITEVERF);
|
|
if (nfsver.tv_sec == 0)
|
|
nfsver = boottime;
|
|
*tl++ = txdr_unsigned(nfsver.tv_sec);
|
|
*tl = txdr_unsigned(nfsver.tv_usec);
|
|
} else {
|
|
error = 0;
|
|
}
|
|
nfsmout:
|
|
if (vp)
|
|
vput(vp);
|
|
vn_finished_write(mp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* nfs statfs service
|
|
*/
|
|
int
|
|
nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct statfs *sf;
|
|
struct nfs_statfs *sfp;
|
|
caddr_t bpos;
|
|
int error = 0, rdonly, getret = 1;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
struct mbuf *mb, *mreq;
|
|
struct vnode *vp = NULL;
|
|
struct vattr at;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
struct statfs statfs;
|
|
u_quad_t tval;
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
vfslocked = 0;
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
error = nfsrv_fhtovp(fhp, 1, &vp, &vfslocked, nfsd, slp,
|
|
nam, &rdonly, TRUE);
|
|
if (error) {
|
|
nfsm_reply(NFSX_UNSIGNED);
|
|
if (v3)
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
sf = &statfs;
|
|
error = VFS_STATFS(vp->v_mount, sf);
|
|
getret = VOP_GETATTR(vp, &at, cred);
|
|
vput(vp);
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_POSTOPATTR(v3) + NFSX_STATFS(v3));
|
|
if (v3)
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
if (error) {
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
sfp = nfsm_build(struct nfs_statfs *, NFSX_STATFS(v3));
|
|
if (v3) {
|
|
tval = (u_quad_t)sf->f_blocks;
|
|
tval *= (u_quad_t)sf->f_bsize;
|
|
txdr_hyper(tval, &sfp->sf_tbytes);
|
|
tval = (u_quad_t)sf->f_bfree;
|
|
tval *= (u_quad_t)sf->f_bsize;
|
|
txdr_hyper(tval, &sfp->sf_fbytes);
|
|
/*
|
|
* Don't send negative values for available space,
|
|
* since this field is unsigned in the NFS protocol.
|
|
* Otherwise, the client would see absurdly high
|
|
* numbers for free space.
|
|
*/
|
|
if (sf->f_bavail < 0)
|
|
tval = 0;
|
|
else
|
|
tval = (u_quad_t)sf->f_bavail;
|
|
tval *= (u_quad_t)sf->f_bsize;
|
|
txdr_hyper(tval, &sfp->sf_abytes);
|
|
sfp->sf_tfiles.nfsuquad[0] = 0;
|
|
sfp->sf_tfiles.nfsuquad[1] = txdr_unsigned(sf->f_files);
|
|
sfp->sf_ffiles.nfsuquad[0] = 0;
|
|
sfp->sf_ffiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree);
|
|
sfp->sf_afiles.nfsuquad[0] = 0;
|
|
sfp->sf_afiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree);
|
|
sfp->sf_invarsec = 0;
|
|
} else {
|
|
sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA);
|
|
sfp->sf_bsize = txdr_unsigned(sf->f_bsize);
|
|
sfp->sf_blocks = txdr_unsigned(sf->f_blocks);
|
|
sfp->sf_bfree = txdr_unsigned(sf->f_bfree);
|
|
if (sf->f_bavail < 0)
|
|
sfp->sf_bavail = 0;
|
|
else
|
|
sfp->sf_bavail = txdr_unsigned(sf->f_bavail);
|
|
}
|
|
nfsmout:
|
|
if (vp)
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* nfs fsinfo service
|
|
*/
|
|
int
|
|
nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct nfsv3_fsinfo *sip;
|
|
caddr_t bpos;
|
|
int error = 0, rdonly, getret = 1, pref;
|
|
struct mbuf *mb, *mreq;
|
|
struct vnode *vp = NULL;
|
|
struct vattr at;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
u_quad_t maxfsize;
|
|
struct statfs sb;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
if (!v3)
|
|
panic("nfsrv_fsinfo: v3 proc called on a v2 connection");
|
|
fhp = &nfh.fh_generic;
|
|
vfslocked = 0;
|
|
nfsm_srvmtofh(fhp);
|
|
error = nfsrv_fhtovp(fhp, 1, &vp, &vfslocked, nfsd, slp,
|
|
nam, &rdonly, TRUE);
|
|
if (error) {
|
|
nfsm_reply(NFSX_UNSIGNED);
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
|
|
/* XXX Try to make a guess on the max file size. */
|
|
VFS_STATFS(vp->v_mount, &sb);
|
|
maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1;
|
|
|
|
getret = VOP_GETATTR(vp, &at, cred);
|
|
vput(vp);
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3FSINFO);
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
sip = nfsm_build(struct nfsv3_fsinfo *, NFSX_V3FSINFO);
|
|
|
|
/*
|
|
* XXX
|
|
* There should be filesystem VFS OP(s) to get this information.
|
|
* For now, assume ufs.
|
|
*/
|
|
pref = NFS_SRVMAXDATA(nfsd);
|
|
sip->fs_rtmax = txdr_unsigned(pref);
|
|
sip->fs_rtpref = txdr_unsigned(pref);
|
|
sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE);
|
|
sip->fs_wtmax = txdr_unsigned(pref);
|
|
sip->fs_wtpref = txdr_unsigned(pref);
|
|
sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE);
|
|
sip->fs_dtpref = txdr_unsigned(pref);
|
|
txdr_hyper(maxfsize, &sip->fs_maxfilesize);
|
|
sip->fs_timedelta.nfsv3_sec = 0;
|
|
sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1);
|
|
sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK |
|
|
NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS |
|
|
NFSV3FSINFO_CANSETTIME);
|
|
nfsmout:
|
|
if (vp)
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* nfs pathconf service
|
|
*/
|
|
int
|
|
nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = nfsd->nd_cr;
|
|
struct nfsv3_pathconf *pc;
|
|
caddr_t bpos;
|
|
int error = 0, rdonly, getret = 1;
|
|
register_t linkmax, namemax, chownres, notrunc;
|
|
struct mbuf *mb, *mreq;
|
|
struct vnode *vp = NULL;
|
|
struct vattr at;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
int v3 = (nfsd->nd_flag & ND_NFSV3);
|
|
int vfslocked;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
if (!v3)
|
|
panic("nfsrv_pathconf: v3 proc called on a v2 connection");
|
|
vfslocked = 0;
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
error = nfsrv_fhtovp(fhp, 1, &vp, &vfslocked, nfsd, slp,
|
|
nam, &rdonly, TRUE);
|
|
if (error) {
|
|
nfsm_reply(NFSX_UNSIGNED);
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax);
|
|
if (!error)
|
|
error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax);
|
|
if (!error)
|
|
error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres);
|
|
if (!error)
|
|
error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc);
|
|
getret = VOP_GETATTR(vp, &at, cred);
|
|
vput(vp);
|
|
vp = NULL;
|
|
nfsm_reply(NFSX_V3POSTOPATTR + NFSX_V3PATHCONF);
|
|
nfsm_srvpostop_attr(getret, &at);
|
|
if (error) {
|
|
error = 0;
|
|
goto nfsmout;
|
|
}
|
|
pc = nfsm_build(struct nfsv3_pathconf *, NFSX_V3PATHCONF);
|
|
|
|
pc->pc_linkmax = txdr_unsigned(linkmax);
|
|
pc->pc_namemax = txdr_unsigned(namemax);
|
|
pc->pc_notrunc = txdr_unsigned(notrunc);
|
|
pc->pc_chownrestricted = txdr_unsigned(chownres);
|
|
|
|
/*
|
|
* These should probably be supported by VOP_PATHCONF(), but
|
|
* until msdosfs is exportable (why would you want to?), the
|
|
* Unix defaults should be ok.
|
|
*/
|
|
pc->pc_caseinsensitive = nfsrv_nfs_false;
|
|
pc->pc_casepreserving = nfsrv_nfs_true;
|
|
nfsmout:
|
|
if (vp)
|
|
vput(vp);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* Null operation, used by clients to ping server
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep;
|
|
caddr_t bpos;
|
|
int error = NFSERR_RETVOID;
|
|
struct mbuf *mb, *mreq;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
nfsm_reply(0);
|
|
nfsmout:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* No operation, used for obsolete procedures
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
|
|
struct mbuf **mrq)
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep;
|
|
caddr_t bpos;
|
|
int error;
|
|
struct mbuf *mb, *mreq;
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
if (nfsd->nd_repstat)
|
|
error = nfsd->nd_repstat;
|
|
else
|
|
error = EPROCUNAVAIL;
|
|
nfsm_reply(0);
|
|
error = 0;
|
|
nfsmout:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Perform access checking for vnodes obtained from file handles that would
|
|
* refer to files already opened by a Unix client. You cannot just use
|
|
* vn_writechk() and VOP_ACCESS() for two reasons.
|
|
* 1 - You must check for exported rdonly as well as MNT_RDONLY for the write
|
|
* case.
|
|
* 2 - The owner is to be given access irrespective of mode bits for some
|
|
* operations, so that processes that chmod after opening a file don't
|
|
* break. I don't like this because it opens a security hole, but since
|
|
* the nfs server opens a security hole the size of a barn door anyhow,
|
|
* what the heck.
|
|
*
|
|
* The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS()
|
|
* will return EPERM instead of EACCES. EPERM is always an error.
|
|
*/
|
|
static int
|
|
nfsrv_access(struct vnode *vp, accmode_t accmode, struct ucred *cred,
|
|
int rdonly, int override)
|
|
{
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
VFS_ASSERT_GIANT(vp->v_mount);
|
|
|
|
nfsdbprintf(("%s %d\n", __FILE__, __LINE__));
|
|
|
|
if (accmode & VWRITE) {
|
|
/* Just vn_writechk() changed to check rdonly */
|
|
/*
|
|
* Disallow write attempts on read-only filesystems;
|
|
* unless the file is a socket or a block or character
|
|
* device resident on the filesystem.
|
|
*/
|
|
if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) {
|
|
switch (vp->v_type) {
|
|
case VREG:
|
|
case VDIR:
|
|
case VLNK:
|
|
return (EROFS);
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
* If there's shared text associated with
|
|
* the inode, we can't allow writing.
|
|
*/
|
|
if (vp->v_vflag & VV_TEXT)
|
|
return (ETXTBSY);
|
|
}
|
|
|
|
error = VOP_GETATTR(vp, &vattr, cred);
|
|
if (error)
|
|
return (error);
|
|
error = VOP_ACCESS(vp, accmode, cred, curthread);
|
|
/*
|
|
* Allow certain operations for the owner (reads and writes
|
|
* on files that are already open).
|
|
*/
|
|
if (override && error == EACCES && cred->cr_uid == vattr.va_uid)
|
|
error = 0;
|
|
return (error);
|
|
}
|