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freebsd/sys/nfs4client/nfs4_vn_subs.c
Alfred Perlstein 1bf8720450 University of Michigan's Citi NFSv4 kernel client code. 
Submitted by: Jim Rees <rees@umich.edu>
2003-11-14 20:54:10 +00:00

224 lines
6.9 KiB
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/* $FreeBSD$ */
/* $Id: nfs4_vn_subs.c,v 1.9 2003/11/05 14:59:00 rees Exp $ */
/*
* copyright (c) 2003
* the regents of the university of michigan
* all rights reserved
*
* permission is granted to use, copy, create derivative works and redistribute
* this software and such derivative works for any purpose, so long as the name
* of the university of michigan is not used in any advertising or publicity
* pertaining to the use or distribution of this software without specific,
* written prior authorization. if the above copyright notice or any other
* identification of the university of michigan is included in any copy of any
* portion of this software, then the disclaimer below must also be included.
*
* this software is provided as is, without representation from the university
* of michigan as to its fitness for any purpose, and without warranty by the
* university of michigan of any kind, either express or implied, including
* without limitation the implied warranties of merchantability and fitness for
* a particular purpose. the regents of the university of michigan shall not be
* liable for any damages, including special, indirect, incidental, or
* consequential damages, with respect to any claim arising out of or in
* connection with the use of the software, even if it has been or is hereafter
* advised of the possibility of such damages.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sockio.h>
#include <sys/vnode.h>
#include <sys/types.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/uma.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <rpc/rpcclnt.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfsclient/nfs.h>
#include <nfsclient/nfsmount.h>
#include <nfs/xdr_subs.h>
#include <nfsclient/nfsm_subs.h>
#include <nfsclient/nfsdiskless.h>
/* NFSv4 */
#include <nfs4client/nfs4.h>
#include <nfs4client/nfs4m_subs.h>
#include <nfs4client/nfs4_vn.h>
#include <nfsclient/nfsnode.h>
void
nfs4_vnop_loadattrcache(struct vnode *vp, struct nfsv4_fattr *fap,
struct vattr *vaper)
{
struct vattr *vap;
struct nfsnode *np;
int32_t rdev;
enum vtype vtyp;
u_short vmode;
struct timespec mtime;
struct timeval tv;
microtime(&tv);
vtyp = nv3tov_type[fap->fa4_type & 0x7];
vmode = (fap->fa4_valid & FA4V_MODE) ? fap->fa4_mode : 0777;
rdev = (fap->fa4_valid & FA4V_RDEV) ?
makeudev(fap->fa4_rdev_major, fap->fa4_rdev_minor) : 0;
if (fap->fa4_valid & FA4V_MTIME)
mtime = fap->fa4_mtime;
else
bzero(&mtime, sizeof mtime);
/*
* If v_type == VNON it is a new node, so fill in the v_type,
* n_mtime fields. Check to see if it represents a special
* device, and if so, check for a possible alias. Once the
* correct vnode has been obtained, fill in the rest of the
* information.
*/
np = VTONFS(vp);
vap = &np->n_vattr;
if (vp->v_type != vtyp || np->n_mtime == 0) {
bzero(vap, sizeof *vap);
vp->v_type = vtyp;
np->n_mtime = mtime.tv_sec;
}
vap->va_type = vtyp;
vap->va_mode = (vmode & 07777);
vap->va_rdev = rdev;
vap->va_mtime = mtime;
vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
if (fap->fa4_valid & FA4V_NLINK)
vap->va_nlink = fap->fa4_nlink;
if (fap->fa4_valid & FA4V_UID)
vap->va_uid = fap->fa4_uid;
if (fap->fa4_valid & FA4V_GID)
vap->va_gid = fap->fa4_gid;
vap->va_size = fap->fa4_size;
vap->va_blocksize = NFS_FABLKSIZE;
vap->va_bytes = fap->fa4_size;
if (fap->fa4_valid & FA4V_FILEID)
vap->va_fileid = nfs_v4fileid4_to_fileid(fap->fa4_fileid);
if (fap->fa4_valid & FA4V_ATIME)
vap->va_atime = fap->fa4_atime;
if (fap->fa4_valid & FA4V_CTIME)
vap->va_ctime = fap->fa4_ctime;
vap->va_flags = 0;
vap->va_filerev = 0;
/* XXX dontshrink flag? */
if (vap->va_size != np->n_size) {
if (vap->va_type == VREG) {
if (np->n_flag & NMODIFIED) {
if (vap->va_size < np->n_size)
vap->va_size = np->n_size;
else
np->n_size = vap->va_size;
} else
np->n_size = vap->va_size;
vnode_pager_setsize(vp, np->n_size);
} else
np->n_size = vap->va_size;
}
np->n_attrstamp = tv.tv_sec;
if (vaper != NULL) {
bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
if (np->n_flag & NCHG) {
if (np->n_flag & NACC)
vaper->va_atime = np->n_atim;
if (np->n_flag & NUPD)
vaper->va_mtime = np->n_mtim;
}
}
}
static uint64_t nfs_nullcookie = 0;
/*
* This function finds the directory cookie that corresponds to the
* logical byte offset given.
*/
uint64_t *
nfs4_getcookie(struct nfsnode *np, off_t off, int add)
{
struct nfsdmap *dp, *dp2;
int pos;
pos = (uoff_t)off / NFS_DIRBLKSIZ;
if (pos == 0 || off < 0) {
#ifdef DIAGNOSTIC
if (add)
panic("nfs getcookie add at <= 0");
#endif
return (&nfs_nullcookie);
}
pos--;
dp = LIST_FIRST(&np->n_cookies);
if (!dp) {
if (add) {
MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap),
M_NFSDIROFF, M_WAITOK);
dp->ndm_eocookie = 0;
LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
} else
return (NULL);
}
while (pos >= NFSNUMCOOKIES) {
pos -= NFSNUMCOOKIES;
if (LIST_NEXT(dp, ndm_list)) {
if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
pos >= dp->ndm_eocookie)
return (NULL);
dp = LIST_NEXT(dp, ndm_list);
} else if (add) {
MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap),
M_NFSDIROFF, M_WAITOK);
dp2->ndm_eocookie = 0;
LIST_INSERT_AFTER(dp, dp2, ndm_list);
dp = dp2;
} else
return (NULL);
}
if (pos >= dp->ndm_eocookie) {
if (add)
dp->ndm_eocookie = pos + 1;
else
return (NULL);
}
return (&dp->ndm4_cookies[pos]);
}
/*
* Invalidate cached directory information, except for the actual directory
* blocks (which are invalidated separately).
* Done mainly to avoid the use of stale offset cookies.
*/
void
nfs4_invaldir(struct vnode *vp)
{
struct nfsnode *np = VTONFS(vp);
np->n_direofoffset = 0;
bzero(np->n4_cookieverf, NFSX_V4VERF);
if (LIST_FIRST(&np->n_cookies))
LIST_FIRST(&np->n_cookies)->ndm_eocookie = 0;
}
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