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NFSv4 fixes from Connectathon 2004:
remove unused pid field of file context struct map nfs4 error codes to errnos eliminate redundant code from nfs4_request use zero stateid on setattr that doesn't set file size use same clientid on all mounts until reboot invalidate dirty bufs in nfs4_close, to play it safe open file for writing if truncating and it's not already open Approved by: alfred
This commit is contained in:
Jim Rees
parent
44bacdd9bc
commit
73c02c410e
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=126330
@ -113,6 +113,62 @@ static struct rpc_program nfs_program = {
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#endif
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static struct {
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short nfserr;
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short syserr;
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} nfs_errtbl[] = {
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{ NFS_OK, 0 },
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{ NFSERR_PERM, EPERM },
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{ NFSERR_NOENT, ENOENT },
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{ NFSERR_IO, EIO },
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{ NFSERR_NXIO, ENXIO },
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{ NFSERR_ACCES, EACCES },
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{ NFSERR_EXIST, EEXIST },
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{ NFSERR_XDEV, EXDEV },
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{ NFSERR_MLINK, EMLINK },
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{ NFSERR_NODEV, ENODEV },
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{ NFSERR_NOTDIR, ENOTDIR },
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{ NFSERR_ISDIR, EISDIR },
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{ NFSERR_INVAL, EINVAL },
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{ NFSERR_FBIG, EFBIG },
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{ NFSERR_NOSPC, ENOSPC },
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{ NFSERR_ROFS, EROFS },
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{ NFSERR_MLINK, EMLINK },
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{ NFSERR_NAMETOL, ENAMETOOLONG },
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{ NFSERR_NOTEMPTY, ENOTEMPTY },
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{ NFSERR_NOTSUPP, EOPNOTSUPP },
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#ifdef EDQUOT
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{ NFSERR_DQUOT, EDQUOT },
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#endif
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{ NFSERR_STALE, ESTALE },
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{ NFSERR_DENIED, EAGAIN },
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{ NFSERR_SYMLINK, ELOOP },
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{ NFSERR_BADXDR, EBADRPC },
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{ NFSERR_WRONGSEC, EPERM },
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{ -1, EIO }
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};
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static int
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nfs4_nfserr_to_syserr(int nfserr)
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{
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int i, syserr;
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/* XXX : not the optimal algorithm, but will do for now! */
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for (i = 0; nfs_errtbl[i].nfserr != -1; i++) {
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if (nfs_errtbl[i].nfserr == nfserr)
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break;
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}
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#ifdef NFS4_MAP_UNKNOWN_ERR
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syserr = nfs_errtbl[i].syserr;
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#else
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if (nfs_errtbl[i].nfserr != -1)
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syserr = nfs_errtbl[i].syserr;
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else
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syserr = nfserr;
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#endif
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return syserr;
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}
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int
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nfs4_connect(struct nfsmount *nmp)
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{
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@ -198,61 +254,17 @@ nfs4_request(struct vnode *vp, struct mbuf *mrest, int procnum,
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struct mbuf **mdp, caddr_t *dposp)
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{
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int error;
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u_int32_t *tl;
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struct nfsmount * nmp = VFSTONFS(vp->v_mount);
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struct rpcclnt * clnt = &nmp->nm_rpcclnt;
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struct mbuf *md, *mrep;
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caddr_t dpos;
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struct rpc_reply reply;
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if ((error = rpcclnt_request(clnt, mrest, procnum, td, cred,
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&reply)) != 0) {
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goto out;
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}
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error = nfs4_request_mnt(VFSTONFS(vp->v_mount), mrest, procnum,
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td, cred, mrp, mdp, dposp);
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/* XXX: don't free mrest if an error occured, to allow caller to retry*/
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m_freem(mrest);
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mrep = reply.mrep;
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md = reply.result_md;
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dpos = reply.result_dpos;
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/*
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** If the File Handle was stale, invalidate the
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** lookup cache, just in case.
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**/
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if (error == ESTALE)
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cache_purge(vp);
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tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED);
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if (*tl != 0) {
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error = fxdr_unsigned(int, *tl);
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#if 0
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if ((nmp->nm_flag & NFSMNT_NFSV3) &&
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error == NFSERR_TRYLATER) {
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m_freem(mrep);
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error = 0;
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waituntil = time_second + trylater_delay;
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while (time_second < waituntil)
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(void) tsleep(&lbolt, PSOCK, "nqnfstry", 0);
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trylater_delay *= nfs_backoff[trylater_cnt];
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if (trylater_cnt < NFS_NBACKOFF - 1)
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trylater_cnt++;
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goto tryagain;
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}
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#endif
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/*
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** If the File Handle was stale, invalidate the
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** lookup cache, just in case.
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**/
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if (error == ESTALE)
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cache_purge(vp);
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goto out;
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}
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*mrp = mrep;
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*mdp = md;
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*dposp = dpos;
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return (0);
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nfsmout:
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out:
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m_freem(reply.mrep);
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*mrp = NULL;
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*mdp = NULL;
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return (error);
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}
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@ -309,7 +321,7 @@ nfs4_request_mnt(struct nfsmount *nmp, struct mbuf *mrest, int procnum,
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m_freem(reply.mrep);
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*mrp = NULL;
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*mdp = NULL;
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return (error);
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return (nfs4_nfserr_to_syserr(error));
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}
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@ -421,10 +421,11 @@ nfsm_v4build_setattr_xx(struct nfs4_compound *cp, struct vattr *vap,
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struct nfs4_fctx *fcp, struct mbuf **mb, caddr_t *bpos)
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{
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int error;
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static char zero_stateid[NFSX_V4STATEID];
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nfsm_buildf_xx(mb, bpos, "uo",
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NFSV4OP_SETATTR,
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NFSX_V4STATEID, fcp->stateid);
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NFSX_V4STATEID, fcp ? fcp->stateid : zero_stateid);
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error = nfsm_v4build_attrs_xx(vap, mb, bpos);
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if (error == 0)
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cp->req_nops++;
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@ -770,7 +770,7 @@ nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred)
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struct route ro;
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char *ipsrc = NULL, uaddr[24], name[24];
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int try = 0;
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static int seq;
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static unsigned long seq;
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int error;
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#ifndef NFS4_USE_RPCCLNT
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@ -784,7 +784,7 @@ nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred)
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/* Try not to re-use clientids */
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if (seq == 0)
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seq = time_second & 0xffffff;
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seq = time_second;
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#ifdef NFS4_USE_RPCCLNT
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scid.cb_netid = (nmp->nm_rpcclnt.rc_sotype == SOCK_STREAM) ? "tcp" : "udp";
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@ -811,7 +811,7 @@ nfs4_do_setclientid(struct nfsmount *nmp, struct ucred *cred)
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RTFREE(ro.ro_rt);
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try_again:
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sprintf(name, "%s-%d", ipsrc, seq++);
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sprintf(name, "%s-%d", ipsrc, (int) ((seq + try) % 1000000L));
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scid.namelen = strlen(name);
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scid.name = name;
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nfs_v4initcompound(&cp);
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@ -90,6 +90,7 @@ __FBSDID("$FreeBSD$");
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#include <sys/lockf.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <sys/lockmgr.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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@ -498,7 +499,7 @@ nfs4_openrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
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/*
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* Since we are currently only one lockowner; we only open the
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* file one each for reading and writing.
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* file once each for reading and writing.
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*/
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if (fcp->refcnt++ != 0) {
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*vpp = vp;
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@ -507,7 +508,6 @@ nfs4_openrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
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}
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fcp->lop = &nfs4_masterlowner;
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fcp->pid = cnp->cn_thread->td_proc->p_pid;
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fcp->np = np;
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nfs_v4initcompound(&cp);
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@ -723,30 +723,7 @@ nfs4_closerpc(struct vnode *vp, struct ucred *cred, struct thread *td, int flags
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/*
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* nfs close vnode op
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* What an NFS client should do upon close after writing is a debatable issue.
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* Most NFS clients push delayed writes to the server upon close, basically for
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* two reasons:
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* 1 - So that any write errors may be reported back to the client process
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* doing the close system call. By far the two most likely errors are
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* NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
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* 2 - To put a worst case upper bound on cache inconsistency between
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* multiple clients for the file.
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* There is also a consistency problem for Version 2 of the protocol w.r.t.
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* not being able to tell if other clients are writing a file concurrently,
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* since there is no way of knowing if the changed modify time in the reply
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* is only due to the write for this client.
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* (NFS Version 3 provides weak cache consistency data in the reply that
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* should be sufficient to detect and handle this case.)
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*
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* The current code does the following:
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* for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
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* for NFS Version 3 - flush dirty buffers to the server but don't invalidate
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* or commit them (this satisfies 1 and 2 except for the
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* case where the server crashes after this close but
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* before the commit RPC, which is felt to be "good
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* enough". Changing the last argument to nfs_flush() to
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* a 1 would force a commit operation, if it is felt a
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* commit is necessary now.
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* play it safe for now (see comments in v2/v3 nfs_close regarding dirty buffers)
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*/
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/* ARGSUSED */
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static int
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@ -760,32 +737,9 @@ nfs4_close(struct vop_close_args *ap)
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return (0);
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if (np->n_flag & NMODIFIED) {
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if (NFS_ISV3(vp)) {
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/*
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* Under NFSv3 we have dirty buffers to
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* dispose of. We must flush them to the NFS
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* server. We have the option of waiting all
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* the way through the commit rpc or just
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* waiting for the initial write. The default
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* is to only wait through the initial write
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* so the data is in the server's cache, which
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* is roughly similar to the state a standard
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* disk subsystem leaves the file in on
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* close().
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*
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* We cannot clear the NMODIFIED bit in
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* np->n_flag due to potential races with
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* other processes, and certainly cannot clear
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* it if we don't commit.
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*/
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int cm = nfsv3_commit_on_close ? 1 : 0;
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error = nfs4_flush(vp, ap->a_cred, MNT_WAIT, ap->a_td, cm);
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/* np->n_flag &= ~NMODIFIED; */
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} else {
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, ap->a_td);
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error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_td, 1);
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VOP_UNLOCK(vp, 0, ap->a_td);
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}
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, ap->a_td);
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error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_td, 1);
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VOP_UNLOCK(vp, 0, ap->a_td);
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np->n_attrstamp = 0;
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}
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@ -946,6 +900,21 @@ nfs4_setattr(struct vop_setattr_args *ap)
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(error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
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ap->a_td, 1)) == EINTR)
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return (error);
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if (vap->va_size != VNOVAL && np->n_wfc.refcnt == 0) {
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/* Have to open the file before we can truncate it */
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struct componentname cn;
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cn.cn_nameptr = np->n_name;
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cn.cn_namelen = np->n_namelen;
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cn.cn_cred = ap->a_cred;
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cn.cn_thread = ap->a_td;
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error = nfs4_openrpc(np->n_dvp, &vp, &cn, FWRITE, NULL);
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if (error)
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return error;
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np->n_flag |= NTRUNCATE;
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}
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error = nfs4_setattrrpc(vp, vap, ap->a_cred, ap->a_td);
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if (error && vap->va_size != VNOVAL) {
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np->n_size = np->n_vattr.va_size = tsize;
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@ -967,7 +936,7 @@ nfs4_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
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struct nfs4_compound cp;
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struct nfs4_oparg_getattr ga;
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struct nfsnode *np = VTONFS(vp);
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struct nfs4_fctx *fcp = &np->n_wfc;
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struct nfs4_fctx *fcp;
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nfsstats.rpccnt[NFSPROC_SETATTR]++;
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mreq = nfsm_reqhead(vp, NFSV4PROC_COMPOUND, 0);
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@ -975,6 +944,7 @@ nfs4_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
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bpos = mtod(mb, caddr_t);
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ga.bm = &nfsv4_getattrbm;
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fcp = (vap->va_size != VNOVAL) ? &np->n_wfc : NULL;
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nfs_v4initcompound(&cp);
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nfsm_v4build_compound(&cp, "nfs4_setattrrpc");
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@ -994,7 +964,7 @@ nfs4_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
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nfs4_vnop_loadattrcache(vp, &ga.fa, NULL);
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/* XXX -- need to implement this in nfs4_setattr*/
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/* TODO: do the settatr and close in a single compound rpc */
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if (np->n_flag & NTRUNCATE) {
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error = nfs4_closerpc(vp, cred, td, FWRITE);
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np->n_flag &= ~NTRUNCATE;
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@ -119,8 +119,6 @@
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*/
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struct nfs4_fctx {
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TAILQ_ENTRY(nfs4_fstate) next;
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pid_t pid;
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uint32_t refcnt;
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struct nfs4_lowner *lop;
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struct nfsnode *np;
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