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Diffstat (limited to 'sys/nfs/nfs_vnops.c')
| -rw-r--r-- | sys/nfs/nfs_vnops.c | 3250 |
1 files changed, 3250 insertions, 0 deletions
diff --git a/sys/nfs/nfs_vnops.c b/sys/nfs/nfs_vnops.c new file mode 100644 index 000000000000..c72f573b9ea5 --- /dev/null +++ b/sys/nfs/nfs_vnops.c @@ -0,0 +1,3250 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Rick Macklem at The University of Guelph. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95 + */ + + +/* + * vnode op calls for Sun NFS version 2 and 3 + */ + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/systm.h> +#include <sys/resourcevar.h> +#include <sys/proc.h> +#include <sys/mount.h> +#include <sys/buf.h> +#include <sys/malloc.h> +#include <sys/mbuf.h> +#include <sys/conf.h> +#include <sys/namei.h> +#include <sys/vnode.h> +#include <sys/dirent.h> +#include <sys/fcntl.h> +#include <ufs/ufs/dir.h> + +#include <vm/vm.h> + +#include <miscfs/specfs/specdev.h> +#include <miscfs/fifofs/fifo.h> + +#include <nfs/rpcv2.h> +#include <nfs/nfsproto.h> +#include <nfs/nfs.h> +#include <nfs/nfsnode.h> +#include <nfs/nfsmount.h> +#include <nfs/xdr_subs.h> +#include <nfs/nfsm_subs.h> +#include <nfs/nqnfs.h> + +#include <net/if.h> +#include <netinet/in.h> +#include <netinet/in_var.h> + +/* Defs */ +#define TRUE 1 +#define FALSE 0 + +/* + * Global vfs data structures for nfs + */ +int (**nfsv2_vnodeop_p)(); +struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { + { &vop_default_desc, vn_default_error }, + { &vop_lookup_desc, nfs_lookup }, /* lookup */ + { &vop_create_desc, nfs_create }, /* create */ + { &vop_mknod_desc, nfs_mknod }, /* mknod */ + { &vop_open_desc, nfs_open }, /* open */ + { &vop_close_desc, nfs_close }, /* close */ + { &vop_access_desc, nfs_access }, /* access */ + { &vop_getattr_desc, nfs_getattr }, /* getattr */ + { &vop_setattr_desc, nfs_setattr }, /* setattr */ + { &vop_read_desc, nfs_read }, /* read */ + { &vop_write_desc, nfs_write }, /* write */ + { &vop_lease_desc, nfs_lease_check }, /* lease */ + { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ + { &vop_select_desc, nfs_select }, /* select */ + { &vop_revoke_desc, nfs_revoke }, /* revoke */ + { &vop_mmap_desc, nfs_mmap }, /* mmap */ + { &vop_fsync_desc, nfs_fsync }, /* fsync */ + { &vop_seek_desc, nfs_seek }, /* seek */ + { &vop_remove_desc, nfs_remove }, /* remove */ + { &vop_link_desc, nfs_link }, /* link */ + { &vop_rename_desc, nfs_rename }, /* rename */ + { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ + { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ + { &vop_symlink_desc, nfs_symlink }, /* symlink */ + { &vop_readdir_desc, nfs_readdir }, /* readdir */ + { &vop_readlink_desc, nfs_readlink }, /* readlink */ + { &vop_abortop_desc, nfs_abortop }, /* abortop */ + { &vop_inactive_desc, nfs_inactive }, /* inactive */ + { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ + { &vop_lock_desc, nfs_lock }, /* lock */ + { &vop_unlock_desc, nfs_unlock }, /* unlock */ + { &vop_bmap_desc, nfs_bmap }, /* bmap */ + { &vop_strategy_desc, nfs_strategy }, /* strategy */ + { &vop_print_desc, nfs_print }, /* print */ + { &vop_islocked_desc, nfs_islocked }, /* islocked */ + { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ + { &vop_advlock_desc, nfs_advlock }, /* advlock */ + { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ + { &vop_valloc_desc, nfs_valloc }, /* valloc */ + { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ + { &vop_vfree_desc, nfs_vfree }, /* vfree */ + { &vop_truncate_desc, nfs_truncate }, /* truncate */ + { &vop_update_desc, nfs_update }, /* update */ + { &vop_bwrite_desc, nfs_bwrite }, + { (struct vnodeop_desc*)NULL, (int(*)())NULL } +}; +struct vnodeopv_desc nfsv2_vnodeop_opv_desc = + { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; + +/* + * Special device vnode ops + */ +int (**spec_nfsv2nodeop_p)(); +struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { + { &vop_default_desc, vn_default_error }, + { &vop_lookup_desc, spec_lookup }, /* lookup */ + { &vop_create_desc, spec_create }, /* create */ + { &vop_mknod_desc, spec_mknod }, /* mknod */ + { &vop_open_desc, spec_open }, /* open */ + { &vop_close_desc, nfsspec_close }, /* close */ + { &vop_access_desc, nfsspec_access }, /* access */ + { &vop_getattr_desc, nfs_getattr }, /* getattr */ + { &vop_setattr_desc, nfs_setattr }, /* setattr */ + { &vop_read_desc, nfsspec_read }, /* read */ + { &vop_write_desc, nfsspec_write }, /* write */ + { &vop_lease_desc, spec_lease_check }, /* lease */ + { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ + { &vop_select_desc, spec_select }, /* select */ + { &vop_revoke_desc, spec_revoke }, /* revoke */ + { &vop_mmap_desc, spec_mmap }, /* mmap */ + { &vop_fsync_desc, nfs_fsync }, /* fsync */ + { &vop_seek_desc, spec_seek }, /* seek */ + { &vop_remove_desc, spec_remove }, /* remove */ + { &vop_link_desc, spec_link }, /* link */ + { &vop_rename_desc, spec_rename }, /* rename */ + { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ + { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ + { &vop_symlink_desc, spec_symlink }, /* symlink */ + { &vop_readdir_desc, spec_readdir }, /* readdir */ + { &vop_readlink_desc, spec_readlink }, /* readlink */ + { &vop_abortop_desc, spec_abortop }, /* abortop */ + { &vop_inactive_desc, nfs_inactive }, /* inactive */ + { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ + { &vop_lock_desc, nfs_lock }, /* lock */ + { &vop_unlock_desc, nfs_unlock }, /* unlock */ + { &vop_bmap_desc, spec_bmap }, /* bmap */ + { &vop_strategy_desc, spec_strategy }, /* strategy */ + { &vop_print_desc, nfs_print }, /* print */ + { &vop_islocked_desc, nfs_islocked }, /* islocked */ + { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ + { &vop_advlock_desc, spec_advlock }, /* advlock */ + { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ + { &vop_valloc_desc, spec_valloc }, /* valloc */ + { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ + { &vop_vfree_desc, spec_vfree }, /* vfree */ + { &vop_truncate_desc, spec_truncate }, /* truncate */ + { &vop_update_desc, nfs_update }, /* update */ + { &vop_bwrite_desc, vn_bwrite }, + { (struct vnodeop_desc*)NULL, (int(*)())NULL } +}; +struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = + { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; + +int (**fifo_nfsv2nodeop_p)(); +struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { + { &vop_default_desc, vn_default_error }, + { &vop_lookup_desc, fifo_lookup }, /* lookup */ + { &vop_create_desc, fifo_create }, /* create */ + { &vop_mknod_desc, fifo_mknod }, /* mknod */ + { &vop_open_desc, fifo_open }, /* open */ + { &vop_close_desc, nfsfifo_close }, /* close */ + { &vop_access_desc, nfsspec_access }, /* access */ + { &vop_getattr_desc, nfs_getattr }, /* getattr */ + { &vop_setattr_desc, nfs_setattr }, /* setattr */ + { &vop_read_desc, nfsfifo_read }, /* read */ + { &vop_write_desc, nfsfifo_write }, /* write */ + { &vop_lease_desc, fifo_lease_check }, /* lease */ + { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ + { &vop_select_desc, fifo_select }, /* select */ + { &vop_revoke_desc, fifo_revoke }, /* revoke */ + { &vop_mmap_desc, fifo_mmap }, /* mmap */ + { &vop_fsync_desc, nfs_fsync }, /* fsync */ + { &vop_seek_desc, fifo_seek }, /* seek */ + { &vop_remove_desc, fifo_remove }, /* remove */ + { &vop_link_desc, fifo_link }, /* link */ + { &vop_rename_desc, fifo_rename }, /* rename */ + { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ + { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ + { &vop_symlink_desc, fifo_symlink }, /* symlink */ + { &vop_readdir_desc, fifo_readdir }, /* readdir */ + { &vop_readlink_desc, fifo_readlink }, /* readlink */ + { &vop_abortop_desc, fifo_abortop }, /* abortop */ + { &vop_inactive_desc, nfs_inactive }, /* inactive */ + { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ + { &vop_lock_desc, nfs_lock }, /* lock */ + { &vop_unlock_desc, nfs_unlock }, /* unlock */ + { &vop_bmap_desc, fifo_bmap }, /* bmap */ + { &vop_strategy_desc, fifo_badop }, /* strategy */ + { &vop_print_desc, nfs_print }, /* print */ + { &vop_islocked_desc, nfs_islocked }, /* islocked */ + { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ + { &vop_advlock_desc, fifo_advlock }, /* advlock */ + { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ + { &vop_valloc_desc, fifo_valloc }, /* valloc */ + { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ + { &vop_vfree_desc, fifo_vfree }, /* vfree */ + { &vop_truncate_desc, fifo_truncate }, /* truncate */ + { &vop_update_desc, nfs_update }, /* update */ + { &vop_bwrite_desc, vn_bwrite }, + { (struct vnodeop_desc*)NULL, (int(*)())NULL } +}; +struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = + { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; + +void nqnfs_clientlease(); +int nfs_commit(); + +/* + * Global variables + */ +extern u_long nfs_true, nfs_false; +extern struct nfsstats nfsstats; +extern nfstype nfsv3_type[9]; +struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; +int nfs_numasync = 0; +#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) + +/* + * nfs null call from vfs. + */ +int +nfs_null(vp, cred, procp) + struct vnode *vp; + struct ucred *cred; + struct proc *procp; +{ + caddr_t bpos, dpos; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb; + + nfsm_reqhead(vp, NFSPROC_NULL, 0); + nfsm_request(vp, NFSPROC_NULL, procp, cred); + nfsm_reqdone; + return (error); +} + +/* + * nfs access vnode op. + * For nfs version 2, just return ok. File accesses may fail later. + * For nfs version 3, use the access rpc to check accessibility. If file modes + * are changed on the server, accesses might still fail later. + */ +int +nfs_access(ap) + struct vop_access_args /* { + struct vnode *a_vp; + int a_mode; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + register u_long *tl; + register caddr_t cp; + register int t1, t2; + caddr_t bpos, dpos, cp2; + int error = 0, attrflag; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + u_long mode, rmode; + int v3 = NFS_ISV3(vp); + + /* + * Disallow write attempts on filesystems mounted read-only; + * unless the file is a socket, fifo, or a block or character + * device resident on the filesystem. + */ + if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { + switch (vp->v_type) { + case VREG: case VDIR: case VLNK: + return (EROFS); + } + } + /* + * For nfs v3, do an access rpc, otherwise you are stuck emulating + * ufs_access() locally using the vattr. This may not be correct, + * since the server may apply other access criteria such as + * client uid-->server uid mapping that we do not know about, but + * this is better than just returning anything that is lying about + * in the cache. + */ + if (v3) { + nfsstats.rpccnt[NFSPROC_ACCESS]++; + nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); + nfsm_fhtom(vp, v3); + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + if (ap->a_mode & VREAD) + mode = NFSV3ACCESS_READ; + else + mode = 0; + if (vp->v_type == VDIR) { + if (ap->a_mode & VWRITE) + mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | + NFSV3ACCESS_DELETE); + if (ap->a_mode & VEXEC) + mode |= NFSV3ACCESS_LOOKUP; + } else { + if (ap->a_mode & VWRITE) + mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); + if (ap->a_mode & VEXEC) + mode |= NFSV3ACCESS_EXECUTE; + } + *tl = txdr_unsigned(mode); + nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred); + nfsm_postop_attr(vp, attrflag); + if (!error) { + nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); + rmode = fxdr_unsigned(u_long, *tl); + /* + * The NFS V3 spec does not clarify whether or not + * the returned access bits can be a superset of + * the ones requested, so... + */ + if ((rmode & mode) != mode) + error = EACCES; + } + nfsm_reqdone; + return (error); + } else + return (nfsspec_access(ap)); +} + +/* + * nfs open vnode op + * Check to see if the type is ok + * and that deletion is not in progress. + * For paged in text files, you will need to flush the page cache + * if consistency is lost. + */ +/* ARGSUSED */ +int +nfs_open(ap) + struct vop_open_args /* { + struct vnode *a_vp; + int a_mode; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + struct nfsnode *np = VTONFS(vp); + struct nfsmount *nmp = VFSTONFS(vp->v_mount); + struct vattr vattr; + int error; + + if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) +{ printf("open eacces vtyp=%d\n",vp->v_type); + return (EACCES); +} + /* + * Get a valid lease. If cached data is stale, flush it. + */ + if (nmp->nm_flag & NFSMNT_NQNFS) { + if (NQNFS_CKINVALID(vp, np, ND_READ)) { + do { + error = nqnfs_getlease(vp, ND_READ, ap->a_cred, + ap->a_p); + } while (error == NQNFS_EXPIRED); + if (error) + return (error); + if (np->n_lrev != np->n_brev || + (np->n_flag & NQNFSNONCACHE)) { + if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, + ap->a_p, 1)) == EINTR) + return (error); + (void) vnode_pager_uncache(vp); + np->n_brev = np->n_lrev; + } + } + } else { + if (np->n_flag & NMODIFIED) { + if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, + ap->a_p, 1)) == EINTR) + return (error); + (void) vnode_pager_uncache(vp); + np->n_attrstamp = 0; + if (vp->v_type == VDIR) + np->n_direofoffset = 0; + error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); + if (error) + return (error); + np->n_mtime = vattr.va_mtime.ts_sec; + } else { + error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); + if (error) + return (error); + if (np->n_mtime != vattr.va_mtime.ts_sec) { + if (vp->v_type == VDIR) + np->n_direofoffset = 0; + if ((error = nfs_vinvalbuf(vp, V_SAVE, + ap->a_cred, ap->a_p, 1)) == EINTR) + return (error); + (void) vnode_pager_uncache(vp); + np->n_mtime = vattr.va_mtime.ts_sec; + } + } + } + if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) + np->n_attrstamp = 0; /* For Open/Close consistency */ + return (0); +} + +/* + * nfs close vnode op + * What an NFS client should do upon close after writing is a debatable issue. + * Most NFS clients push delayed writes to the server upon close, basically for + * two reasons: + * 1 - So that any write errors may be reported back to the client process + * doing the close system call. By far the two most likely errors are + * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. + * 2 - To put a worst case upper bound on cache inconsistency between + * multiple clients for the file. + * There is also a consistency problem for Version 2 of the protocol w.r.t. + * not being able to tell if other clients are writing a file concurrently, + * since there is no way of knowing if the changed modify time in the reply + * is only due to the write for this client. + * (NFS Version 3 provides weak cache consistency data in the reply that + * should be sufficient to detect and handle this case.) + * + * The current code does the following: + * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers + * for NFS Version 3 - flush dirty buffers to the server but don't invalidate + * or commit them (this satisfies 1 and 2 except for the + * case where the server crashes after this close but + * before the commit RPC, which is felt to be "good + * enough". Changing the last argument to nfs_flush() to + * a 1 would force a commit operation, if it is felt a + * commit is necessary now. + * for NQNFS - do nothing now, since 2 is dealt with via leases and + * 1 should be dealt with via an fsync() system call for + * cases where write errors are important. + */ +/* ARGSUSED */ +int +nfs_close(ap) + struct vop_close_args /* { + struct vnodeop_desc *a_desc; + struct vnode *a_vp; + int a_fflag; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + register struct nfsnode *np = VTONFS(vp); + int error = 0; + + if (vp->v_type == VREG) { + if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && + (np->n_flag & NMODIFIED)) { + if (NFS_ISV3(vp)) + error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); + else + error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); + np->n_attrstamp = 0; + } + if (np->n_flag & NWRITEERR) { + np->n_flag &= ~NWRITEERR; + error = np->n_error; + } + } + return (error); +} + +/* + * nfs getattr call from vfs. + */ +int +nfs_getattr(ap) + struct vop_getattr_args /* { + struct vnode *a_vp; + struct vattr *a_vap; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + register struct nfsnode *np = VTONFS(vp); + register caddr_t cp; + register u_long *tl; + register int t1, t2; + caddr_t bpos, dpos; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + int v3 = NFS_ISV3(vp); + + /* + * Update local times for special files. + */ + if (np->n_flag & (NACC | NUPD)) + np->n_flag |= NCHG; + /* + * First look in the cache. + */ + if (nfs_getattrcache(vp, ap->a_vap) == 0) + return (0); + nfsstats.rpccnt[NFSPROC_GETATTR]++; + nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3)); + nfsm_fhtom(vp, v3); + nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred); + if (!error) + nfsm_loadattr(vp, ap->a_vap); + nfsm_reqdone; + return (error); +} + +/* + * nfs setattr call. + */ +int +nfs_setattr(ap) + struct vop_setattr_args /* { + struct vnodeop_desc *a_desc; + struct vnode *a_vp; + struct vattr *a_vap; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + register struct nfsnode *np = VTONFS(vp); + register struct vattr *vap = ap->a_vap; + int error = 0; + u_quad_t tsize; + +#ifndef nolint + tsize = (u_quad_t)0; +#endif + /* + * Disallow write attempts if the filesystem is mounted read-only. + */ + if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || + vap->va_gid != (gid_t)VNOVAL || vap->va_atime.ts_sec != VNOVAL || + vap->va_mtime.ts_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && + (vp->v_mount->mnt_flag & MNT_RDONLY)) + return (EROFS); + if (vap->va_size != VNOVAL) { + switch (vp->v_type) { + case VDIR: + return (EISDIR); + case VCHR: + case VBLK: + case VSOCK: + case VFIFO: + if (vap->va_mtime.ts_sec == VNOVAL && + vap->va_atime.ts_sec == VNOVAL && + vap->va_mode == (u_short)VNOVAL && + vap->va_uid == (uid_t)VNOVAL && + vap->va_gid == (gid_t)VNOVAL) + return (0); + vap->va_size = VNOVAL; + break; + default: + /* + * Disallow write attempts if the filesystem is + * mounted read-only. + */ + if (vp->v_mount->mnt_flag & MNT_RDONLY) + return (EROFS); + if (np->n_flag & NMODIFIED) { + if (vap->va_size == 0) + error = nfs_vinvalbuf(vp, 0, + ap->a_cred, ap->a_p, 1); + else + error = nfs_vinvalbuf(vp, V_SAVE, + ap->a_cred, ap->a_p, 1); + if (error) + return (error); + } + tsize = np->n_size; + np->n_size = np->n_vattr.va_size = vap->va_size; + vnode_pager_setsize(vp, (u_long)np->n_size); + }; + } else if ((vap->va_mtime.ts_sec != VNOVAL || + vap->va_atime.ts_sec != VNOVAL) && (np->n_flag & NMODIFIED) && + vp->v_type == VREG && + (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, + ap->a_p, 1)) == EINTR) + return (error); + error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); + if (error) { + np->n_size = np->n_vattr.va_size = tsize; + vnode_pager_setsize(vp, (u_long)np->n_size); + } + return (error); +} + +/* + * Do an nfs setattr rpc. + */ +int +nfs_setattrrpc(vp, vap, cred, procp) + register struct vnode *vp; + register struct vattr *vap; + struct ucred *cred; + struct proc *procp; +{ + register struct nfsv2_sattr *sp; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos, cp2; + u_long *tl; + int error = 0, wccflag = NFSV3_WCCRATTR; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + u_quad_t frev; + int v3 = NFS_ISV3(vp); + + nfsstats.rpccnt[NFSPROC_SETATTR]++; + nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); + nfsm_fhtom(vp, v3); + if (v3) { + if (vap->va_mode != (u_short)VNOVAL) { + nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); + *tl++ = nfs_true; + *tl = txdr_unsigned(vap->va_mode); + } else { + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + *tl = nfs_false; + } + if (vap->va_uid != (uid_t)VNOVAL) { + nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); + *tl++ = nfs_true; + *tl = txdr_unsigned(vap->va_uid); + } else { + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + *tl = nfs_false; + } + if (vap->va_gid != (gid_t)VNOVAL) { + nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); + *tl++ = nfs_true; + *tl = txdr_unsigned(vap->va_gid); + } else { + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + *tl = nfs_false; + } + if (vap->va_size != VNOVAL) { + nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); + *tl++ = nfs_true; + txdr_hyper(&vap->va_size, tl); + } else { + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + *tl = nfs_false; + } + if (vap->va_atime.ts_sec != VNOVAL) { + if (vap->va_atime.ts_sec != time.tv_sec) { + nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); + *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); + txdr_nfsv3time(&vap->va_atime, tl); + } else { + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); + } + } else { + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); + } + if (vap->va_mtime.ts_sec != VNOVAL) { + if (vap->va_mtime.ts_sec != time.tv_sec) { + nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); + *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); + txdr_nfsv3time(&vap->va_atime, tl); + } else { + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); + } + } else { + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); + } + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + *tl = nfs_false; + } else { + nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); + if (vap->va_mode == (u_short)VNOVAL) + sp->sa_mode = VNOVAL; + else + sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); + if (vap->va_uid == (uid_t)VNOVAL) + sp->sa_uid = VNOVAL; + else + sp->sa_uid = txdr_unsigned(vap->va_uid); + if (vap->va_gid == (gid_t)VNOVAL) + sp->sa_gid = VNOVAL; + else + sp->sa_gid = txdr_unsigned(vap->va_gid); + sp->sa_size = txdr_unsigned(vap->va_size); + txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); + txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); + } + nfsm_request(vp, NFSPROC_SETATTR, procp, cred); + if (v3) { + nfsm_wcc_data(vp, wccflag); + } else + nfsm_loadattr(vp, (struct vattr *)0); + nfsm_reqdone; + return (error); +} + +/* + * nfs lookup call, one step at a time... + * First look in cache + * If not found, unlock the directory nfsnode and do the rpc + */ +int +nfs_lookup(ap) + struct vop_lookup_args /* { + struct vnodeop_desc *a_desc; + struct vnode *a_dvp; + struct vnode **a_vpp; + struct componentname *a_cnp; + } */ *ap; +{ + register struct componentname *cnp = ap->a_cnp; + register struct vnode *dvp = ap->a_dvp; + register struct vnode **vpp = ap->a_vpp; + register int flags = cnp->cn_flags; + register struct proc *p = cnp->cn_proc; + register struct vnode *newvp; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + struct nfsmount *nmp; + caddr_t bpos, dpos, cp2; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + long len; + nfsfh_t *fhp; + struct nfsnode *np; + int lockparent, wantparent, error = 0, attrflag, fhsize; + int v3 = NFS_ISV3(dvp); + + if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && + (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) + return (EROFS); + *vpp = NULLVP; + if (dvp->v_type != VDIR) + return (ENOTDIR); + lockparent = flags & LOCKPARENT; + wantparent = flags & (LOCKPARENT|WANTPARENT); + nmp = VFSTONFS(dvp->v_mount); + np = VTONFS(dvp); + if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) { + struct vattr vattr; + int vpid; + + newvp = *vpp; + vpid = newvp->v_id; + /* + * See the comment starting `Step through' in ufs/ufs_lookup.c + * for an explanation of the locking protocol + */ + if (dvp == newvp) { + VREF(newvp); + error = 0; + } else + error = vget(newvp, LK_EXCLUSIVE, p); + if (!error) { + if (vpid == newvp->v_id) { + if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) + && vattr.va_ctime.ts_sec == VTONFS(newvp)->n_ctime) { + nfsstats.lookupcache_hits++; + if (cnp->cn_nameiop != LOOKUP && + (flags & ISLASTCN)) + cnp->cn_flags |= SAVENAME; + return (0); + } + cache_purge(newvp); + } + vrele(newvp); + } + *vpp = NULLVP; + } + error = 0; + newvp = NULLVP; + nfsstats.lookupcache_misses++; + nfsstats.rpccnt[NFSPROC_LOOKUP]++; + len = cnp->cn_namelen; + nfsm_reqhead(dvp, NFSPROC_LOOKUP, + NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); + nfsm_fhtom(dvp, v3); + nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); + nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); + if (error) { + nfsm_postop_attr(dvp, attrflag); + m_freem(mrep); + goto nfsmout; + } + nfsm_getfh(fhp, fhsize, v3); + + /* + * Handle RENAME case... + */ + if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { + if (NFS_CMPFH(np, fhp, fhsize)) { + m_freem(mrep); + return (EISDIR); + } + if (error = nfs_nget(dvp->v_mount, fhp, fhsize, &np)) { + m_freem(mrep); + return (error); + } + newvp = NFSTOV(np); + if (v3) { + nfsm_postop_attr(newvp, attrflag); + nfsm_postop_attr(dvp, attrflag); + } else + nfsm_loadattr(newvp, (struct vattr *)0); + *vpp = newvp; + m_freem(mrep); + cnp->cn_flags |= SAVENAME; + return (0); + } + + if (NFS_CMPFH(np, fhp, fhsize)) { + VREF(dvp); + newvp = dvp; + } else { + if (error = nfs_nget(dvp->v_mount, fhp, fhsize, &np)) { + m_freem(mrep); + return (error); + } + newvp = NFSTOV(np); + } + if (v3) { + nfsm_postop_attr(newvp, attrflag); + nfsm_postop_attr(dvp, attrflag); + } else + nfsm_loadattr(newvp, (struct vattr *)0); + if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) + cnp->cn_flags |= SAVENAME; + if ((cnp->cn_flags & MAKEENTRY) && + (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { + np->n_ctime = np->n_vattr.va_ctime.ts_sec; + cache_enter(dvp, newvp, cnp); + } + *vpp = newvp; + nfsm_reqdone; + if (error) { + if (newvp != NULLVP) + vrele(newvp); + if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && + (flags & ISLASTCN) && error == ENOENT) { + if (dvp->v_mount->mnt_flag & MNT_RDONLY) + error = EROFS; + else + error = EJUSTRETURN; + } + if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) + cnp->cn_flags |= SAVENAME; + } + return (error); +} + +/* + * nfs read call. + * Just call nfs_bioread() to do the work. + */ +int +nfs_read(ap) + struct vop_read_args /* { + struct vnode *a_vp; + struct uio *a_uio; + int a_ioflag; + struct ucred *a_cred; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + + if (vp->v_type != VREG) + return (EPERM); + return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); +} + +/* + * nfs readlink call + */ +int +nfs_readlink(ap) + struct vop_readlink_args /* { + struct vnode *a_vp; + struct uio *a_uio; + struct ucred *a_cred; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + + if (vp->v_type != VLNK) + return (EPERM); + return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred)); +} + +/* + * Do a readlink rpc. + * Called by nfs_doio() from below the buffer cache. + */ +int +nfs_readlinkrpc(vp, uiop, cred) + register struct vnode *vp; + struct uio *uiop; + struct ucred *cred; +{ + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos, cp2; + int error = 0, len, attrflag; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + int v3 = NFS_ISV3(vp); + + nfsstats.rpccnt[NFSPROC_READLINK]++; + nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3)); + nfsm_fhtom(vp, v3); + nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred); + if (v3) + nfsm_postop_attr(vp, attrflag); + if (!error) { + nfsm_strsiz(len, NFS_MAXPATHLEN); + nfsm_mtouio(uiop, len); + } + nfsm_reqdone; + return (error); +} + +/* + * nfs read rpc call + * Ditto above + */ +int +nfs_readrpc(vp, uiop, cred) + register struct vnode *vp; + struct uio *uiop; + struct ucred *cred; +{ + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos, cp2; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + struct nfsmount *nmp; + int error = 0, len, retlen, tsiz, eof, attrflag; + int v3 = NFS_ISV3(vp); + +#ifndef nolint + eof = 0; +#endif + nmp = VFSTONFS(vp->v_mount); + tsiz = uiop->uio_resid; + if (uiop->uio_offset + tsiz > 0xffffffff && !v3) + return (EFBIG); + while (tsiz > 0) { + nfsstats.rpccnt[NFSPROC_READ]++; + len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; + nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); + nfsm_fhtom(vp, v3); + nfsm_build(tl, u_long *, NFSX_UNSIGNED * 3); + if (v3) { + txdr_hyper(&uiop->uio_offset, tl); + *(tl + 2) = txdr_unsigned(len); + } else { + *tl++ = txdr_unsigned(uiop->uio_offset); + *tl++ = txdr_unsigned(len); + *tl = 0; + } + nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred); + if (v3) { + nfsm_postop_attr(vp, attrflag); + if (error) { + m_freem(mrep); + goto nfsmout; + } + nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); + eof = fxdr_unsigned(int, *(tl + 1)); + } else + nfsm_loadattr(vp, (struct vattr *)0); + nfsm_strsiz(retlen, nmp->nm_rsize); + nfsm_mtouio(uiop, retlen); + m_freem(mrep); + tsiz -= retlen; + if (v3) { + if (eof || retlen == 0) + tsiz = 0; + } else if (retlen < len) + tsiz = 0; + } +nfsmout: + return (error); +} + +/* + * nfs write call + */ +int +nfs_writerpc(vp, uiop, cred, iomode, must_commit) + register struct vnode *vp; + register struct uio *uiop; + struct ucred *cred; + int *iomode, *must_commit; +{ + register u_long *tl; + register caddr_t cp; + register int t1, t2, backup; + caddr_t bpos, dpos, cp2; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + struct nfsmount *nmp = VFSTONFS(vp->v_mount); + struct nfsnode *np = VTONFS(vp); + u_quad_t frev; + int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; + int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; + +#ifndef DIAGNOSTIC + if (uiop->uio_iovcnt != 1) + panic("nfs: writerpc iovcnt > 1"); +#endif + *must_commit = 0; + tsiz = uiop->uio_resid; + if (uiop->uio_offset + tsiz > 0xffffffff && !v3) + return (EFBIG); + while (tsiz > 0) { + nfsstats.rpccnt[NFSPROC_WRITE]++; + len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; + nfsm_reqhead(vp, NFSPROC_WRITE, + NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); + nfsm_fhtom(vp, v3); + if (v3) { + nfsm_build(tl, u_long *, 5 * NFSX_UNSIGNED); + txdr_hyper(&uiop->uio_offset, tl); + tl += 2; + *tl++ = txdr_unsigned(len); + *tl++ = txdr_unsigned(*iomode); + } else { + nfsm_build(tl, u_long *, 4 * NFSX_UNSIGNED); + *++tl = txdr_unsigned(uiop->uio_offset); + tl += 2; + } + *tl = txdr_unsigned(len); + nfsm_uiotom(uiop, len); + nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred); + if (v3) { + wccflag = NFSV3_WCCCHK; + nfsm_wcc_data(vp, wccflag); + if (!error) { + nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED + + NFSX_V3WRITEVERF); + rlen = fxdr_unsigned(int, *tl++); + if (rlen == 0) { + error = NFSERR_IO; + break; + } else if (rlen < len) { + backup = len - rlen; + uiop->uio_iov->iov_base -= backup; + uiop->uio_iov->iov_len += backup; + uiop->uio_offset -= backup; + uiop->uio_resid += backup; + len = rlen; + } + commit = fxdr_unsigned(int, *tl++); + + /* + * Return the lowest committment level + * obtained by any of the RPCs. + */ + if (committed == NFSV3WRITE_FILESYNC) + committed = commit; + else if (committed == NFSV3WRITE_DATASYNC && + commit == NFSV3WRITE_UNSTABLE) + committed = commit; + if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) { + bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, + NFSX_V3WRITEVERF); + nmp->nm_flag |= NFSMNT_HASWRITEVERF; + } else if (bcmp((caddr_t)tl, + (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { + *must_commit = 1; + bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, + NFSX_V3WRITEVERF); + } + } + } else + nfsm_loadattr(vp, (struct vattr *)0); + if (wccflag) + VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.ts_sec; + m_freem(mrep); + tsiz -= len; + } +nfsmout: + *iomode = committed; + if (error) + uiop->uio_resid = tsiz; + return (error); +} + +/* + * nfs mknod rpc + * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the + * mode set to specify the file type and the size field for rdev. + */ +int +nfs_mknodrpc(dvp, vpp, cnp, vap) + register struct vnode *dvp; + register struct vnode **vpp; + register struct componentname *cnp; + register struct vattr *vap; +{ + register struct nfsv2_sattr *sp; + register struct nfsv3_sattr *sp3; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + struct vnode *newvp = (struct vnode *)0; + struct nfsnode *np; + struct vattr vattr; + char *cp2; + caddr_t bpos, dpos; + int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + u_long rdev; + int v3 = NFS_ISV3(dvp); + + if (vap->va_type == VCHR || vap->va_type == VBLK) + rdev = txdr_unsigned(vap->va_rdev); + else if (vap->va_type == VFIFO || vap->va_type == VSOCK) + rdev = 0xffffffff; + else { + VOP_ABORTOP(dvp, cnp); + vput(dvp); + return (EOPNOTSUPP); + } + if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { + VOP_ABORTOP(dvp, cnp); + vput(dvp); + return (error); + } + nfsstats.rpccnt[NFSPROC_MKNOD]++; + nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + + + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); + nfsm_fhtom(dvp, v3); + nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); + if (v3) { + nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3SRVSATTR); + *tl++ = vtonfsv3_type(vap->va_type); + sp3 = (struct nfsv3_sattr *)tl; + nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid); + if (vap->va_type == VCHR || vap->va_type == VBLK) { + nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); + *tl++ = txdr_unsigned(major(vap->va_rdev)); + *tl = txdr_unsigned(minor(vap->va_rdev)); + } + } else { + nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); + sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); + sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); + sp->sa_gid = txdr_unsigned(vattr.va_gid); + sp->sa_size = rdev; + txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); + txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); + } + nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); + if (!error) { + nfsm_mtofh(dvp, newvp, v3, gotvp); + if (!gotvp) { + if (newvp) { + vrele(newvp); + newvp = (struct vnode *)0; + } + error = nfs_lookitup(dvp, cnp->cn_nameptr, + cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); + if (!error) + newvp = NFSTOV(np); + } + } + if (v3) + nfsm_wcc_data(dvp, wccflag); + nfsm_reqdone; + if (error) { + if (newvp) + vrele(newvp); + } else { + if (cnp->cn_flags & MAKEENTRY) + cache_enter(dvp, newvp, cnp); + *vpp = newvp; + } + FREE(cnp->cn_pnbuf, M_NAMEI); + VTONFS(dvp)->n_flag |= NMODIFIED; + if (!wccflag) + VTONFS(dvp)->n_attrstamp = 0; + vrele(dvp); + return (error); +} + +/* + * nfs mknod vop + * just call nfs_mknodrpc() to do the work. + */ +/* ARGSUSED */ +int +nfs_mknod(ap) + struct vop_mknod_args /* { + struct vnode *a_dvp; + struct vnode **a_vpp; + struct componentname *a_cnp; + struct vattr *a_vap; + } */ *ap; +{ + struct vnode *newvp; + int error; + + error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap); + if (!error) + vrele(newvp); + return (error); +} + +static u_long create_verf; +/* + * nfs file create call + */ +int +nfs_create(ap) + struct vop_create_args /* { + struct vnode *a_dvp; + struct vnode **a_vpp; + struct componentname *a_cnp; + struct vattr *a_vap; + } */ *ap; +{ + register struct vnode *dvp = ap->a_dvp; + register struct vattr *vap = ap->a_vap; + register struct componentname *cnp = ap->a_cnp; + register struct nfsv2_sattr *sp; + register struct nfsv3_sattr *sp3; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + struct nfsnode *np = (struct nfsnode *)0; + struct vnode *newvp = (struct vnode *)0; + caddr_t bpos, dpos, cp2; + int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + struct vattr vattr; + int v3 = NFS_ISV3(dvp); + + /* + * Oops, not for me.. + */ + if (vap->va_type == VSOCK) + return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); + + if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { + VOP_ABORTOP(dvp, cnp); + vput(dvp); + return (error); + } + if (vap->va_vaflags & VA_EXCLUSIVE) + fmode |= O_EXCL; +again: + nfsstats.rpccnt[NFSPROC_CREATE]++; + nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); + nfsm_fhtom(dvp, v3); + nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); + if (v3) { + nfsm_build(tl, u_long *, NFSX_UNSIGNED); + if (fmode & O_EXCL) { + *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); + nfsm_build(tl, u_long *, NFSX_V3CREATEVERF); + if (in_ifaddr) + *tl++ = IA_SIN(in_ifaddr)->sin_addr.s_addr; + else + *tl++ = create_verf; + *tl = ++create_verf; + } else { + *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); + nfsm_build(tl, u_long *, NFSX_V3SRVSATTR); + sp3 = (struct nfsv3_sattr *)tl; + nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid); + } + } else { + nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); + sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); + sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); + sp->sa_gid = txdr_unsigned(vattr.va_gid); + sp->sa_size = 0; + txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); + txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); + } + nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); + if (!error) { + nfsm_mtofh(dvp, newvp, v3, gotvp); + if (!gotvp) { + if (newvp) { + vrele(newvp); + newvp = (struct vnode *)0; + } + error = nfs_lookitup(dvp, cnp->cn_nameptr, + cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); + if (!error) + newvp = NFSTOV(np); + } + } + if (v3) + nfsm_wcc_data(dvp, wccflag); + nfsm_reqdone; + if (error) { + if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { + fmode &= ~O_EXCL; + goto again; + } + if (newvp) + vrele(newvp); + } else if (v3 && (fmode & O_EXCL)) + error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); + if (!error) { + if (cnp->cn_flags & MAKEENTRY) + cache_enter(dvp, newvp, cnp); + *ap->a_vpp = newvp; + } + FREE(cnp->cn_pnbuf, M_NAMEI); + VTONFS(dvp)->n_flag |= NMODIFIED; + if (!wccflag) + VTONFS(dvp)->n_attrstamp = 0; + vrele(dvp); + return (error); +} + +/* + * nfs file remove call + * To try and make nfs semantics closer to ufs semantics, a file that has + * other processes using the vnode is renamed instead of removed and then + * removed later on the last close. + * - If v_usecount > 1 + * If a rename is not already in the works + * call nfs_sillyrename() to set it up + * else + * do the remove rpc + */ +int +nfs_remove(ap) + struct vop_remove_args /* { + struct vnodeop_desc *a_desc; + struct vnode * a_dvp; + struct vnode * a_vp; + struct componentname * a_cnp; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + register struct vnode *dvp = ap->a_dvp; + register struct componentname *cnp = ap->a_cnp; + register struct nfsnode *np = VTONFS(vp); + register u_long *tl; + register caddr_t cp; + register long t2; + caddr_t bpos, dpos; + int error = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + struct vattr vattr; + int v3 = NFS_ISV3(dvp); + +#ifndef DIAGNOSTIC + if ((cnp->cn_flags & HASBUF) == 0) + panic("nfs_remove: no name"); + if (vp->v_usecount < 1) + panic("nfs_remove: bad v_usecount"); +#endif + if (vp->v_usecount == 1 || (np->n_sillyrename && + VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && + vattr.va_nlink > 1)) { + /* + * Purge the name cache so that the chance of a lookup for + * the name succeeding while the remove is in progress is + * minimized. Without node locking it can still happen, such + * that an I/O op returns ESTALE, but since you get this if + * another host removes the file.. + */ + cache_purge(vp); + /* + * throw away biocache buffers, mainly to avoid + * unnecessary delayed writes later. + */ + error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); + /* Do the rpc */ + if (error != EINTR) + error = nfs_removerpc(dvp, cnp->cn_nameptr, + cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); + /* + * Kludge City: If the first reply to the remove rpc is lost.. + * the reply to the retransmitted request will be ENOENT + * since the file was in fact removed + * Therefore, we cheat and return success. + */ + if (error == ENOENT) + error = 0; + } else if (!np->n_sillyrename) + error = nfs_sillyrename(dvp, vp, cnp); + FREE(cnp->cn_pnbuf, M_NAMEI); + np->n_attrstamp = 0; + vrele(dvp); + vrele(vp); + return (error); +} + +/* + * nfs file remove rpc called from nfs_inactive + */ +int +nfs_removeit(sp) + register struct sillyrename *sp; +{ + + return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, + (struct proc *)0)); +} + +/* + * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). + */ +int +nfs_removerpc(dvp, name, namelen, cred, proc) + register struct vnode *dvp; + char *name; + int namelen; + struct ucred *cred; + struct proc *proc; +{ + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos, cp2; + int error = 0, wccflag = NFSV3_WCCRATTR; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + int v3 = NFS_ISV3(dvp); + + nfsstats.rpccnt[NFSPROC_REMOVE]++; + nfsm_reqhead(dvp, NFSPROC_REMOVE, + NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); + nfsm_fhtom(dvp, v3); + nfsm_strtom(name, namelen, NFS_MAXNAMLEN); + nfsm_request(dvp, NFSPROC_REMOVE, proc, cred); + if (v3) + nfsm_wcc_data(dvp, wccflag); + nfsm_reqdone; + VTONFS(dvp)->n_flag |= NMODIFIED; + if (!wccflag) + VTONFS(dvp)->n_attrstamp = 0; + return (error); +} + +/* + * nfs file rename call + */ +int +nfs_rename(ap) + struct vop_rename_args /* { + struct vnode *a_fdvp; + struct vnode *a_fvp; + struct componentname *a_fcnp; + struct vnode *a_tdvp; + struct vnode *a_tvp; + struct componentname *a_tcnp; + } */ *ap; +{ + register struct vnode *fvp = ap->a_fvp; + register struct vnode *tvp = ap->a_tvp; + register struct vnode *fdvp = ap->a_fdvp; + register struct vnode *tdvp = ap->a_tdvp; + register struct componentname *tcnp = ap->a_tcnp; + register struct componentname *fcnp = ap->a_fcnp; + int error; + +#ifndef DIAGNOSTIC + if ((tcnp->cn_flags & HASBUF) == 0 || + (fcnp->cn_flags & HASBUF) == 0) + panic("nfs_rename: no name"); +#endif + /* Check for cross-device rename */ + if ((fvp->v_mount != tdvp->v_mount) || + (tvp && (fvp->v_mount != tvp->v_mount))) { + error = EXDEV; + goto out; + } + + /* + * If the tvp exists and is in use, sillyrename it before doing the + * rename of the new file over it. + */ + if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && + !nfs_sillyrename(tdvp, tvp, tcnp)) { + vrele(tvp); + tvp = NULL; + } + + error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, + tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, + tcnp->cn_proc); + + if (fvp->v_type == VDIR) { + if (tvp != NULL && tvp->v_type == VDIR) + cache_purge(tdvp); + cache_purge(fdvp); + } +out: + if (tdvp == tvp) + vrele(tdvp); + else + vput(tdvp); + if (tvp) + vput(tvp); + vrele(fdvp); + vrele(fvp); + /* + * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. + */ + if (error == ENOENT) + error = 0; + return (error); +} + +/* + * nfs file rename rpc called from nfs_remove() above + */ +int +nfs_renameit(sdvp, scnp, sp) + struct vnode *sdvp; + struct componentname *scnp; + register struct sillyrename *sp; +{ + return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, + sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); +} + +/* + * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). + */ +int +nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) + register struct vnode *fdvp; + char *fnameptr; + int fnamelen; + register struct vnode *tdvp; + char *tnameptr; + int tnamelen; + struct ucred *cred; + struct proc *proc; +{ + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos, cp2; + int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + int v3 = NFS_ISV3(fdvp); + + nfsstats.rpccnt[NFSPROC_RENAME]++; + nfsm_reqhead(fdvp, NFSPROC_RENAME, + (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + + nfsm_rndup(tnamelen)); + nfsm_fhtom(fdvp, v3); + nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); + nfsm_fhtom(tdvp, v3); + nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); + nfsm_request(fdvp, NFSPROC_RENAME, proc, cred); + if (v3) { + nfsm_wcc_data(fdvp, fwccflag); + nfsm_wcc_data(tdvp, twccflag); + } + nfsm_reqdone; + VTONFS(fdvp)->n_flag |= NMODIFIED; + VTONFS(tdvp)->n_flag |= NMODIFIED; + if (!fwccflag) + VTONFS(fdvp)->n_attrstamp = 0; + if (!twccflag) + VTONFS(tdvp)->n_attrstamp = 0; + return (error); +} + +/* + * nfs hard link create call + */ +int +nfs_link(ap) + struct vop_link_args /* { + struct vnode *a_vp; + struct vnode *a_tdvp; + struct componentname *a_cnp; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + register struct vnode *tdvp = ap->a_tdvp; + register struct componentname *cnp = ap->a_cnp; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos, cp2; + int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + int v3 = NFS_ISV3(vp); + + if (vp->v_mount != tdvp->v_mount) { + /*VOP_ABORTOP(vp, cnp);*/ + if (tdvp == vp) + vrele(tdvp); + else + vput(tdvp); + return (EXDEV); + } + + /* + * Push all writes to the server, so that the attribute cache + * doesn't get "out of sync" with the server. + * XXX There should be a better way! + */ + VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc); + + nfsstats.rpccnt[NFSPROC_LINK]++; + nfsm_reqhead(vp, NFSPROC_LINK, + NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); + nfsm_fhtom(vp, v3); + nfsm_fhtom(tdvp, v3); + nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); + nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); + if (v3) { + nfsm_postop_attr(vp, attrflag); + nfsm_wcc_data(tdvp, wccflag); + } + nfsm_reqdone; + FREE(cnp->cn_pnbuf, M_NAMEI); + VTONFS(tdvp)->n_flag |= NMODIFIED; + if (!attrflag) + VTONFS(vp)->n_attrstamp = 0; + if (!wccflag) + VTONFS(tdvp)->n_attrstamp = 0; + vrele(tdvp); + /* + * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. + */ + if (error == EEXIST) + error = 0; + return (error); +} + +/* + * nfs symbolic link create call + */ +int +nfs_symlink(ap) + struct vop_symlink_args /* { + struct vnode *a_dvp; + struct vnode **a_vpp; + struct componentname *a_cnp; + struct vattr *a_vap; + char *a_target; + } */ *ap; +{ + register struct vnode *dvp = ap->a_dvp; + register struct vattr *vap = ap->a_vap; + register struct componentname *cnp = ap->a_cnp; + register struct nfsv2_sattr *sp; + register struct nfsv3_sattr *sp3; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos, cp2; + int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + struct vnode *newvp = (struct vnode *)0; + int v3 = NFS_ISV3(dvp); + + nfsstats.rpccnt[NFSPROC_SYMLINK]++; + slen = strlen(ap->a_target); + nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + + nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); + nfsm_fhtom(dvp, v3); + nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); + if (v3) { + nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR); + nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, + cnp->cn_cred->cr_gid); + } + nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); + if (!v3) { + nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); + sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); + sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); + sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid); + sp->sa_size = -1; + txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); + txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); + } + nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); + if (v3) { + if (!error) + nfsm_mtofh(dvp, newvp, v3, gotvp); + nfsm_wcc_data(dvp, wccflag); + } + nfsm_reqdone; + if (newvp) + vrele(newvp); + FREE(cnp->cn_pnbuf, M_NAMEI); + VTONFS(dvp)->n_flag |= NMODIFIED; + if (!wccflag) + VTONFS(dvp)->n_attrstamp = 0; + vrele(dvp); + /* + * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. + */ + if (error == EEXIST) + error = 0; + return (error); +} + +/* + * nfs make dir call + */ +int +nfs_mkdir(ap) + struct vop_mkdir_args /* { + struct vnode *a_dvp; + struct vnode **a_vpp; + struct componentname *a_cnp; + struct vattr *a_vap; + } */ *ap; +{ + register struct vnode *dvp = ap->a_dvp; + register struct vattr *vap = ap->a_vap; + register struct componentname *cnp = ap->a_cnp; + register struct nfsv2_sattr *sp; + register struct nfsv3_sattr *sp3; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + register int len; + struct nfsnode *np = (struct nfsnode *)0; + struct vnode *newvp = (struct vnode *)0; + caddr_t bpos, dpos, cp2; + nfsfh_t *fhp; + int error = 0, wccflag = NFSV3_WCCRATTR, attrflag; + int fhsize, gotvp = 0; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + struct vattr vattr; + int v3 = NFS_ISV3(dvp); + + if (error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) { + VOP_ABORTOP(dvp, cnp); + vput(dvp); + return (error); + } + len = cnp->cn_namelen; + nfsstats.rpccnt[NFSPROC_MKDIR]++; + nfsm_reqhead(dvp, NFSPROC_MKDIR, + NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); + nfsm_fhtom(dvp, v3); + nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); + if (v3) { + nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR); + nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid); + } else { + nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); + sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); + sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid); + sp->sa_gid = txdr_unsigned(vattr.va_gid); + sp->sa_size = -1; + txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); + txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); + } + nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); + if (!error) + nfsm_mtofh(dvp, newvp, v3, gotvp); + if (v3) + nfsm_wcc_data(dvp, wccflag); + nfsm_reqdone; + VTONFS(dvp)->n_flag |= NMODIFIED; + if (!wccflag) + VTONFS(dvp)->n_attrstamp = 0; + /* + * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry + * if we can succeed in looking up the directory. + */ + if (error == EEXIST || (!error && !gotvp)) { + if (newvp) { + vrele(newvp); + newvp = (struct vnode *)0; + } + error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, + cnp->cn_proc, &np); + if (!error) { + newvp = NFSTOV(np); + if (newvp->v_type != VDIR) + error = EEXIST; + } + } + if (error) { + if (newvp) + vrele(newvp); + } else + *ap->a_vpp = newvp; + FREE(cnp->cn_pnbuf, M_NAMEI); + vrele(dvp); + return (error); +} + +/* + * nfs remove directory call + */ +int +nfs_rmdir(ap) + struct vop_rmdir_args /* { + struct vnode *a_dvp; + struct vnode *a_vp; + struct componentname *a_cnp; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + register struct vnode *dvp = ap->a_dvp; + register struct componentname *cnp = ap->a_cnp; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + caddr_t bpos, dpos, cp2; + int error = 0, wccflag = NFSV3_WCCRATTR; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + int v3 = NFS_ISV3(dvp); + + if (dvp == vp) { + vrele(dvp); + vrele(dvp); + FREE(cnp->cn_pnbuf, M_NAMEI); + return (EINVAL); + } + nfsstats.rpccnt[NFSPROC_RMDIR]++; + nfsm_reqhead(dvp, NFSPROC_RMDIR, + NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); + nfsm_fhtom(dvp, v3); + nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); + nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); + if (v3) + nfsm_wcc_data(dvp, wccflag); + nfsm_reqdone; + FREE(cnp->cn_pnbuf, M_NAMEI); + VTONFS(dvp)->n_flag |= NMODIFIED; + if (!wccflag) + VTONFS(dvp)->n_attrstamp = 0; + cache_purge(dvp); + cache_purge(vp); + vrele(vp); + vrele(dvp); + /* + * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. + */ + if (error == ENOENT) + error = 0; + return (error); +} + +/* + * nfs readdir call + */ +int +nfs_readdir(ap) + struct vop_readdir_args /* { + struct vnode *a_vp; + struct uio *a_uio; + struct ucred *a_cred; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + register struct nfsnode *np = VTONFS(vp); + register struct uio *uio = ap->a_uio; + int tresid, error; + struct vattr vattr; + + if (vp->v_type != VDIR) + return (EPERM); + /* + * First, check for hit on the EOF offset cache + */ + if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && + (np->n_flag & NMODIFIED) == 0) { + if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) { + if (NQNFS_CKCACHABLE(vp, ND_READ)) { + nfsstats.direofcache_hits++; + return (0); + } + } else if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 && + np->n_mtime == vattr.va_mtime.ts_sec) { + nfsstats.direofcache_hits++; + return (0); + } + } + + /* + * Call nfs_bioread() to do the real work. + */ + tresid = uio->uio_resid; + error = nfs_bioread(vp, uio, 0, ap->a_cred); + + if (!error && uio->uio_resid == tresid) + nfsstats.direofcache_misses++; + return (error); +} + +/* + * Readdir rpc call. + * Called from below the buffer cache by nfs_doio(). + */ +int +nfs_readdirrpc(vp, uiop, cred) + struct vnode *vp; + register struct uio *uiop; + struct ucred *cred; +{ + register int len, left; + register struct dirent *dp; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + register nfsuint64 *cookiep; + caddr_t bpos, dpos, cp2; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + nfsuint64 cookie; + struct nfsmount *nmp = VFSTONFS(vp->v_mount); + struct nfsnode *dnp = VTONFS(vp); + nfsfh_t *fhp; + u_quad_t frev, fileno; + int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1, i; + int cachable, attrflag, fhsize; + int v3 = NFS_ISV3(vp); + +#ifndef nolint + dp = (struct dirent *)0; +#endif +#ifndef DIAGNOSTIC + if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (NFS_DIRBLKSIZ - 1)) || + (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) + panic("nfs readdirrpc bad uio"); +#endif + + /* + * If there is no cookie, assume end of directory. + */ + cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); + if (cookiep) + cookie = *cookiep; + else + return (0); + /* + * Loop around doing readdir rpc's of size nm_readdirsize + * truncated to a multiple of DIRBLKSIZ. + * The stopping criteria is EOF or buffer full. + */ + while (more_dirs && bigenough) { + nfsstats.rpccnt[NFSPROC_READDIR]++; + nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) + + NFSX_READDIR(v3)); + nfsm_fhtom(vp, v3); + if (v3) { + nfsm_build(tl, u_long *, 5 * NFSX_UNSIGNED); + *tl++ = cookie.nfsuquad[0]; + *tl++ = cookie.nfsuquad[1]; + *tl++ = dnp->n_cookieverf.nfsuquad[0]; + *tl++ = dnp->n_cookieverf.nfsuquad[1]; + } else { + nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); + *tl++ = cookie.nfsuquad[0]; + } + *tl = txdr_unsigned(nmp->nm_readdirsize); + nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); + if (v3) { + nfsm_postop_attr(vp, attrflag); + if (!error) { + nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); + dnp->n_cookieverf.nfsuquad[0] = *tl++; + dnp->n_cookieverf.nfsuquad[1] = *tl; + } else { + m_freem(mrep); + goto nfsmout; + } + } + nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); + more_dirs = fxdr_unsigned(int, *tl); + + /* loop thru the dir entries, doctoring them to 4bsd form */ + while (more_dirs && bigenough) { + if (v3) { + nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); + fxdr_hyper(tl, &fileno); + len = fxdr_unsigned(int, *(tl + 2)); + } else { + nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); + fileno = fxdr_unsigned(u_quad_t, *tl++); + len = fxdr_unsigned(int, *tl); + } + if (len <= 0 || len > NFS_MAXNAMLEN) { + error = EBADRPC; + m_freem(mrep); + goto nfsmout; + } + tlen = nfsm_rndup(len); + if (tlen == len) + tlen += 4; /* To ensure null termination */ + left = DIRBLKSIZ - blksiz; + if ((tlen + DIRHDSIZ) > left) { + dp->d_reclen += left; + uiop->uio_iov->iov_base += left; + uiop->uio_iov->iov_len -= left; + uiop->uio_offset += left; + uiop->uio_resid -= left; + blksiz = 0; + } + if ((tlen + DIRHDSIZ) > uiop->uio_resid) + bigenough = 0; + if (bigenough) { + dp = (struct dirent *)uiop->uio_iov->iov_base; + dp->d_fileno = (int)fileno; + dp->d_namlen = len; + dp->d_reclen = tlen + DIRHDSIZ; + dp->d_type = DT_UNKNOWN; + blksiz += dp->d_reclen; + if (blksiz == DIRBLKSIZ) + blksiz = 0; + uiop->uio_offset += DIRHDSIZ; + uiop->uio_resid -= DIRHDSIZ; + uiop->uio_iov->iov_base += DIRHDSIZ; + uiop->uio_iov->iov_len -= DIRHDSIZ; + nfsm_mtouio(uiop, len); + cp = uiop->uio_iov->iov_base; + tlen -= len; + *cp = '\0'; /* null terminate */ + uiop->uio_iov->iov_base += tlen; + uiop->uio_iov->iov_len -= tlen; + uiop->uio_offset += tlen; + uiop->uio_resid -= tlen; + } else + nfsm_adv(nfsm_rndup(len)); + if (v3) { + nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); + } else { + nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); + } + if (bigenough) { + cookie.nfsuquad[0] = *tl++; + if (v3) + cookie.nfsuquad[1] = *tl++; + } else if (v3) + tl += 2; + else + tl++; + more_dirs = fxdr_unsigned(int, *tl); + } + /* + * If at end of rpc data, get the eof boolean + */ + if (!more_dirs) { + nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); + more_dirs = (fxdr_unsigned(int, *tl) == 0); + } + m_freem(mrep); + } + /* + * Fill last record, iff any, out to a multiple of DIRBLKSIZ + * by increasing d_reclen for the last record. + */ + if (blksiz > 0) { + left = DIRBLKSIZ - blksiz; + dp->d_reclen += left; + uiop->uio_iov->iov_base += left; + uiop->uio_iov->iov_len -= left; + uiop->uio_offset += left; + uiop->uio_resid -= left; + } + + /* + * We are now either at the end of the directory or have filled the + * block. + */ + if (bigenough) + dnp->n_direofoffset = uiop->uio_offset; + else { + if (uiop->uio_resid > 0) + printf("EEK! readdirrpc resid > 0\n"); + cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); + *cookiep = cookie; + } +nfsmout: + return (error); +} + +/* + * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). + */ +int +nfs_readdirplusrpc(vp, uiop, cred) + struct vnode *vp; + register struct uio *uiop; + struct ucred *cred; +{ + register int len, left; + register struct dirent *dp; + register u_long *tl; + register caddr_t cp; + register long t1, t2; + register struct vnode *newvp; + register nfsuint64 *cookiep; + caddr_t bpos, dpos, cp2, dpossav1, dpossav2; + struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2; + struct nameidata nami, *ndp = &nami; + struct componentname *cnp = &ndp->ni_cnd; + nfsuint64 cookie; + struct nfsmount *nmp = VFSTONFS(vp->v_mount); + struct nfsnode *dnp = VTONFS(vp), *np; + nfsfh_t *fhp; + u_quad_t frev, fileno; + int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; + int cachable, attrflag, fhsize; + +#ifndef nolint + dp = (struct dirent *)0; +#endif +#ifndef DIAGNOSTIC + if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || + (uiop->uio_resid & (DIRBLKSIZ - 1))) + panic("nfs readdirplusrpc bad uio"); +#endif + ndp->ni_dvp = vp; + newvp = NULLVP; + + /* + * If there is no cookie, assume end of directory. + */ + cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); + if (cookiep) + cookie = *cookiep; + else + return (0); + /* + * Loop around doing readdir rpc's of size nm_readdirsize + * truncated to a multiple of DIRBLKSIZ. + * The stopping criteria is EOF or buffer full. + */ + while (more_dirs && bigenough) { + nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; + nfsm_reqhead(vp, NFSPROC_READDIRPLUS, + NFSX_FH(1) + 6 * NFSX_UNSIGNED); + nfsm_fhtom(vp, 1); + nfsm_build(tl, u_long *, 6 * NFSX_UNSIGNED); + *tl++ = cookie.nfsuquad[0]; + *tl++ = cookie.nfsuquad[1]; + *tl++ = dnp->n_cookieverf.nfsuquad[0]; + *tl++ = dnp->n_cookieverf.nfsuquad[1]; + *tl++ = txdr_unsigned(nmp->nm_readdirsize); + *tl = txdr_unsigned(nmp->nm_rsize); + nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); + nfsm_postop_attr(vp, attrflag); + if (error) { + m_freem(mrep); + goto nfsmout; + } + nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); + dnp->n_cookieverf.nfsuquad[0] = *tl++; + dnp->n_cookieverf.nfsuquad[1] = *tl++; + more_dirs = fxdr_unsigned(int, *tl); + + /* loop thru the dir entries, doctoring them to 4bsd form */ + while (more_dirs && bigenough) { + nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); + fxdr_hyper(tl, &fileno); + len = fxdr_unsigned(int, *(tl + 2)); + if (len <= 0 || len > NFS_MAXNAMLEN) { + error = EBADRPC; + m_freem(mrep); + goto nfsmout; + } + tlen = nfsm_rndup(len); + if (tlen == len) + tlen += 4; /* To ensure null termination*/ + left = DIRBLKSIZ - blksiz; + if ((tlen + DIRHDSIZ) > left) { + dp->d_reclen += left; + uiop->uio_iov->iov_base += left; + uiop->uio_iov->iov_len -= left; + uiop->uio_offset += left; + uiop->uio_resid -= left; + blksiz = 0; + } + if ((tlen + DIRHDSIZ) > uiop->uio_resid) + bigenough = 0; + if (bigenough) { + dp = (struct dirent *)uiop->uio_iov->iov_base; + dp->d_fileno = (int)fileno; + dp->d_namlen = len; + dp->d_reclen = tlen + DIRHDSIZ; + dp->d_type = DT_UNKNOWN; + blksiz += dp->d_reclen; + if (blksiz == DIRBLKSIZ) + blksiz = 0; + uiop->uio_offset += DIRHDSIZ; + uiop->uio_resid -= DIRHDSIZ; + uiop->uio_iov->iov_base += DIRHDSIZ; + uiop->uio_iov->iov_len -= DIRHDSIZ; + cnp->cn_nameptr = uiop->uio_iov->iov_base; + cnp->cn_namelen = len; + nfsm_mtouio(uiop, len); + cp = uiop->uio_iov->iov_base; + tlen -= len; + *cp = '\0'; + uiop->uio_iov->iov_base += tlen; + uiop->uio_iov->iov_len -= tlen; + uiop->uio_offset += tlen; + uiop->uio_resid -= tlen; + } else + nfsm_adv(nfsm_rndup(len)); + nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); + if (bigenough) { + cookie.nfsuquad[0] = *tl++; + cookie.nfsuquad[1] = *tl++; + } else + tl += 2; + + /* + * Since the attributes are before the file handle + * (sigh), we must skip over the attributes and then + * come back and get them. + */ + attrflag = fxdr_unsigned(int, *tl); + if (attrflag) { + dpossav1 = dpos; + mdsav1 = md; + nfsm_adv(NFSX_V3FATTR); + nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); + doit = fxdr_unsigned(int, *tl); + if (doit) { + nfsm_getfh(fhp, fhsize, 1); + if (NFS_CMPFH(dnp, fhp, fhsize)) { + VREF(vp); + newvp = vp; + np = dnp; + } else { + if (error = nfs_nget(vp->v_mount, fhp, + fhsize, &np)) + doit = 0; + else + newvp = NFSTOV(np); + } + } + if (doit) { + dpossav2 = dpos; + dpos = dpossav1; + mdsav2 = md; + md = mdsav1; + nfsm_loadattr(newvp, (struct vattr *)0); + dpos = dpossav2; + md = mdsav2; + dp->d_type = + IFTODT(VTTOIF(np->n_vattr.va_type)); + ndp->ni_vp = newvp; + cnp->cn_hash = 0; + for (cp = cnp->cn_nameptr, i = 1; i <= len; + i++, cp++) + cnp->cn_hash += (unsigned char)*cp * i; + if (cnp->cn_namelen <= NCHNAMLEN) + cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp); + } + } else { + /* Just skip over the file handle */ + nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); + i = fxdr_unsigned(int, *tl); + nfsm_adv(nfsm_rndup(i)); + } + if (newvp != NULLVP) { + vrele(newvp); + newvp = NULLVP; + } + nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); + more_dirs = fxdr_unsigned(int, *tl); + } + /* + * If at end of rpc data, get the eof boolean + */ + if (!more_dirs) { + nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); + more_dirs = (fxdr_unsigned(int, *tl) == 0); + } + m_freem(mrep); + } + /* + * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ + * by increasing d_reclen for the last record. + */ + if (blksiz > 0) { + left = DIRBLKSIZ - blksiz; + dp->d_reclen += left; + uiop->uio_iov->iov_base += left; + uiop->uio_iov->iov_len -= left; + uiop->uio_offset += left; + uiop->uio_resid -= left; + } + + /* + * We are now either at the end of the directory or have filled the + * block. + */ + if (bigenough) + dnp->n_direofoffset = uiop->uio_offset; + else { + if (uiop->uio_resid > 0) + printf("EEK! readdirplusrpc resid > 0\n"); + cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); + *cookiep = cookie; + } +nfsmout: + if (newvp != NULLVP) + vrele(newvp); + return (error); +} +static char hextoasc[] = "0123456789abcdef"; + +/* + * Silly rename. To make the NFS filesystem that is stateless look a little + * more like the "ufs" a remove of an active vnode is translated to a rename + * to a funny looking filename that is removed by nfs_inactive on the + * nfsnode. There is the potential for another process on a different client + * to create the same funny name between the nfs_lookitup() fails and the + * nfs_rename() completes, but... + */ +int +nfs_sillyrename(dvp, vp, cnp) + struct vnode *dvp, *vp; + struct componentname *cnp; +{ + register struct sillyrename *sp; + struct nfsnode *np; + int error; + short pid; + + cache_purge(dvp); + np = VTONFS(vp); +#ifndef DIAGNOSTIC + if (vp->v_type == VDIR) + panic("nfs: sillyrename dir"); +#endif + MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), + M_NFSREQ, M_WAITOK); + sp->s_cred = crdup(cnp->cn_cred); + sp->s_dvp = dvp; + VREF(dvp); + + /* Fudge together a funny name */ + pid = cnp->cn_proc->p_pid; + bcopy(".nfsAxxxx4.4", sp->s_name, 13); + sp->s_namlen = 12; + sp->s_name[8] = hextoasc[pid & 0xf]; + sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; + sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; + sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; + + /* Try lookitups until we get one that isn't there */ + while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, + cnp->cn_proc, (struct nfsnode **)0) == 0) { + sp->s_name[4]++; + if (sp->s_name[4] > 'z') { + error = EINVAL; + goto bad; + } + } + if (error = nfs_renameit(dvp, cnp, sp)) + goto bad; + error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, + cnp->cn_proc, &np); + np->n_sillyrename = sp; + return (0); +bad: + vrele(sp->s_dvp); + crfree(sp->s_cred); + free((caddr_t)sp, M_NFSREQ); + return (error); +} + +/* + * Look up a file name and optionally either update the file handle or + * allocate an nfsnode, depending on the value of npp. + * npp == NULL --> just do the lookup + * *npp == NULL --> allocate a new nfsnode and make sure attributes are + * handled too + * *npp != NULL --> update the file handle in the vnode + */ +int +nfs_lookitup(dvp, name, len, cred, procp, npp) + register struct vnode *dvp; + char *name; + int len; + struct ucred *cred; + struct proc *procp; + struct nfsnode **npp; +{ + register u_long *tl; + register caddr_t cp; + register long t1, t2; + struct vnode *newvp = (struct vnode *)0; + struct nfsnode *np, *dnp = VTONFS(dvp); + caddr_t bpos, dpos, cp2; + int error = 0, fhlen, attrflag; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + nfsfh_t *nfhp; + int v3 = NFS_ISV3(dvp); + + nfsstats.rpccnt[NFSPROC_LOOKUP]++; + nfsm_reqhead(dvp, NFSPROC_LOOKUP, + NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); + nfsm_fhtom(dvp, v3); + nfsm_strtom(name, len, NFS_MAXNAMLEN); + nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred); + if (npp && !error) { + nfsm_getfh(nfhp, fhlen, v3); + if (*npp) { + np = *npp; + if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { + free((caddr_t)np->n_fhp, M_NFSBIGFH); + np->n_fhp = &np->n_fh; + } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) + np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); + bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); + np->n_fhsize = fhlen; + newvp = NFSTOV(np); + } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { + VREF(dvp); + newvp = dvp; + } else { + error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); + if (error) { + m_freem(mrep); + return (error); + } + newvp = NFSTOV(np); + } + if (v3) { + nfsm_postop_attr(newvp, attrflag); + if (!attrflag && *npp == NULL) { + m_freem(mrep); + vrele(newvp); + return (ENOENT); + } + } else + nfsm_loadattr(newvp, (struct vattr *)0); + } + nfsm_reqdone; + if (npp && *npp == NULL) { + if (error) { + if (newvp) + vrele(newvp); + } else + *npp = np; + } + return (error); +} + +/* + * Nfs Version 3 commit rpc + */ +int +nfs_commit(vp, offset, cnt, cred, procp) + register struct vnode *vp; + u_quad_t offset; + int cnt; + struct ucred *cred; + struct proc *procp; +{ + register caddr_t cp; + register u_long *tl; + register int t1, t2; + register struct nfsmount *nmp = VFSTONFS(vp->v_mount); + caddr_t bpos, dpos, cp2; + int error = 0, wccflag = NFSV3_WCCRATTR; + struct mbuf *mreq, *mrep, *md, *mb, *mb2; + + if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) + return (0); + nfsstats.rpccnt[NFSPROC_COMMIT]++; + nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1)); + nfsm_fhtom(vp, 1); + nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED); + txdr_hyper(&offset, tl); + tl += 2; + *tl = txdr_unsigned(cnt); + nfsm_request(vp, NFSPROC_COMMIT, procp, cred); + nfsm_wcc_data(vp, wccflag); + if (!error) { + nfsm_dissect(tl, u_long *, NFSX_V3WRITEVERF); + if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, + NFSX_V3WRITEVERF)) { + bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, + NFSX_V3WRITEVERF); + error = NFSERR_STALEWRITEVERF; + } + } + nfsm_reqdone; + return (error); +} + +/* + * Kludge City.. + * - make nfs_bmap() essentially a no-op that does no translation + * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc + * (Maybe I could use the process's page mapping, but I was concerned that + * Kernel Write might not be enabled and also figured copyout() would do + * a lot more work than bcopy() and also it currently happens in the + * context of the swapper process (2). + */ +int +nfs_bmap(ap) + struct vop_bmap_args /* { + struct vnode *a_vp; + daddr_t a_bn; + struct vnode **a_vpp; + daddr_t *a_bnp; + int *a_runp; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + + if (ap->a_vpp != NULL) + *ap->a_vpp = vp; + if (ap->a_bnp != NULL) + *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize); + return (0); +} + +/* + * Strategy routine. + * For async requests when nfsiod(s) are running, queue the request by + * calling nfs_asyncio(), otherwise just all nfs_doio() to do the + * request. + */ +int +nfs_strategy(ap) + struct vop_strategy_args *ap; +{ + register struct buf *bp = ap->a_bp; + struct ucred *cr; + struct proc *p; + int error = 0; + + if (bp->b_flags & B_PHYS) + panic("nfs physio"); + if (bp->b_flags & B_ASYNC) + p = (struct proc *)0; + else + p = curproc; /* XXX */ + if (bp->b_flags & B_READ) + cr = bp->b_rcred; + else + cr = bp->b_wcred; + /* + * If the op is asynchronous and an i/o daemon is waiting + * queue the request, wake it up and wait for completion + * otherwise just do it ourselves. + */ + if ((bp->b_flags & B_ASYNC) == 0 || + nfs_asyncio(bp, NOCRED)) + error = nfs_doio(bp, cr, p); + return (error); +} + +/* + * Mmap a file + * + * NB Currently unsupported. + */ +/* ARGSUSED */ +int +nfs_mmap(ap) + struct vop_mmap_args /* { + struct vnode *a_vp; + int a_fflags; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap; +{ + + return (EINVAL); +} + +/* + * fsync vnode op. Just call nfs_flush() with commit == 1. + */ +/* ARGSUSED */ +int +nfs_fsync(ap) + struct vop_fsync_args /* { + struct vnodeop_desc *a_desc; + struct vnode * a_vp; + struct ucred * a_cred; + int a_waitfor; + struct proc * a_p; + } */ *ap; +{ + + return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_p, 1)); +} + +/* + * Flush all the blocks associated with a vnode. + * Walk through the buffer pool and push any dirty pages + * associated with the vnode. + */ +int +nfs_flush(vp, cred, waitfor, p, commit) + register struct vnode *vp; + struct ucred *cred; + int waitfor; + struct proc *p; + int commit; +{ + register struct nfsnode *np = VTONFS(vp); + register struct buf *bp; + register int i; + struct buf *nbp; + struct nfsmount *nmp = VFSTONFS(vp->v_mount); + int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; + int passone = 1; + u_quad_t off = (u_quad_t)-1, endoff = 0, toff; +#ifndef NFS_COMMITBVECSIZ +#define NFS_COMMITBVECSIZ 20 +#endif + struct buf *bvec[NFS_COMMITBVECSIZ]; + + if (nmp->nm_flag & NFSMNT_INT) + slpflag = PCATCH; + if (!commit) + passone = 0; + /* + * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the + * server, but nas not been committed to stable storage on the server + * yet. On the first pass, the byte range is worked out and the commit + * rpc is done. On the second pass, nfs_writebp() is called to do the + * job. + */ +again: + bvecpos = 0; + if (NFS_ISV3(vp) && commit) { + s = splbio(); + for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { + nbp = bp->b_vnbufs.le_next; + if (bvecpos >= NFS_COMMITBVECSIZ) + break; + if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) + != (B_DELWRI | B_NEEDCOMMIT)) + continue; + bremfree(bp); + bp->b_flags |= (B_BUSY | B_WRITEINPROG); + /* + * A list of these buffers is kept so that the + * second loop knows which buffers have actually + * been committed. This is necessary, since there + * may be a race between the commit rpc and new + * uncommitted writes on the file. + */ + bvec[bvecpos++] = bp; + toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + + bp->b_dirtyoff; + if (toff < off) + off = toff; + toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); + if (toff > endoff) + endoff = toff; + } + splx(s); + } + if (bvecpos > 0) { + /* + * Commit data on the server, as required. + */ + retv = nfs_commit(vp, off, (int)(endoff - off), cred, p); + if (retv == NFSERR_STALEWRITEVERF) + nfs_clearcommit(vp->v_mount); + /* + * Now, either mark the blocks I/O done or mark the + * blocks dirty, depending on whether the commit + * succeeded. + */ + for (i = 0; i < bvecpos; i++) { + bp = bvec[i]; + bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG); + if (retv) { + brelse(bp); + } else { + vp->v_numoutput++; + bp->b_flags |= B_ASYNC; + bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); + bp->b_dirtyoff = bp->b_dirtyend = 0; + reassignbuf(bp, vp); + biodone(bp); + } + } + } + + /* + * Start/do any write(s) that are required. + */ +loop: + s = splbio(); + for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { + nbp = bp->b_vnbufs.le_next; + if (bp->b_flags & B_BUSY) { + if (waitfor != MNT_WAIT || passone) + continue; + bp->b_flags |= B_WANTED; + error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1), + "nfsfsync", slptimeo); + splx(s); + if (error) { + if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) + return (EINTR); + if (slpflag == PCATCH) { + slpflag = 0; + slptimeo = 2 * hz; + } + } + goto loop; + } + if ((bp->b_flags & B_DELWRI) == 0) + panic("nfs_fsync: not dirty"); + if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) + continue; + bremfree(bp); + if (passone || !commit) + bp->b_flags |= (B_BUSY|B_ASYNC); + else + bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT); + splx(s); + VOP_BWRITE(bp); + goto loop; + } + splx(s); + if (passone) { + passone = 0; + goto again; + } + if (waitfor == MNT_WAIT) { + while (vp->v_numoutput) { + vp->v_flag |= VBWAIT; + error = tsleep((caddr_t)&vp->v_numoutput, + slpflag | (PRIBIO + 1), "nfsfsync", slptimeo); + if (error) { + if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) + return (EINTR); + if (slpflag == PCATCH) { + slpflag = 0; + slptimeo = 2 * hz; + } + } + } + if (vp->v_dirtyblkhd.lh_first && commit) { +#ifndef DIAGNOSTIC + vprint("nfs_fsync: dirty", vp); +#endif + goto loop; + } + } + if (np->n_flag & NWRITEERR) { + error = np->n_error; + np->n_flag &= ~NWRITEERR; + } + return (error); +} + +/* + * Return POSIX pathconf information applicable to nfs. + * + * The NFS V2 protocol doesn't support this, so just return EINVAL + * for V2. + */ +/* ARGSUSED */ +int +nfs_pathconf(ap) + struct vop_pathconf_args /* { + struct vnode *a_vp; + int a_name; + int *a_retval; + } */ *ap; +{ + + return (EINVAL); +} + +/* + * NFS advisory byte-level locks. + * Currently unsupported. + */ +int +nfs_advlock(ap) + struct vop_advlock_args /* { + struct vnode *a_vp; + caddr_t a_id; + int a_op; + struct flock *a_fl; + int a_flags; + } */ *ap; +{ + + return (EOPNOTSUPP); +} + +/* + * Print out the contents of an nfsnode. + */ +int +nfs_print(ap) + struct vop_print_args /* { + struct vnode *a_vp; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + register struct nfsnode *np = VTONFS(vp); + + printf("tag VT_NFS, fileid %ld fsid 0x%lx", + np->n_vattr.va_fileid, np->n_vattr.va_fsid); + if (vp->v_type == VFIFO) + fifo_printinfo(vp); + printf("\n"); + return (0); +} + +/* + * NFS directory offset lookup. + * Currently unsupported. + */ +int +nfs_blkatoff(ap) + struct vop_blkatoff_args /* { + struct vnode *a_vp; + off_t a_offset; + char **a_res; + struct buf **a_bpp; + } */ *ap; +{ + + return (EOPNOTSUPP); +} + +/* + * NFS flat namespace allocation. + * Currently unsupported. + */ +int +nfs_valloc(ap) + struct vop_valloc_args /* { + struct vnode *a_pvp; + int a_mode; + struct ucred *a_cred; + struct vnode **a_vpp; + } */ *ap; +{ + + return (EOPNOTSUPP); +} + +/* + * NFS flat namespace free. + * Currently unsupported. + */ +int +nfs_vfree(ap) + struct vop_vfree_args /* { + struct vnode *a_pvp; + ino_t a_ino; + int a_mode; + } */ *ap; +{ + + return (EOPNOTSUPP); +} + +/* + * NFS file truncation. + */ +int +nfs_truncate(ap) + struct vop_truncate_args /* { + struct vnode *a_vp; + off_t a_length; + int a_flags; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap; +{ + + /* Use nfs_setattr */ + printf("nfs_truncate: need to implement!!"); + return (EOPNOTSUPP); +} + +/* + * NFS update. + */ +int +nfs_update(ap) + struct vop_update_args /* { + struct vnode *a_vp; + struct timeval *a_ta; + struct timeval *a_tm; + int a_waitfor; + } */ *ap; +{ + + /* Use nfs_setattr */ + printf("nfs_update: need to implement!!"); + return (EOPNOTSUPP); +} + +/* + * Just call nfs_writebp() with the force argument set to 1. + */ +int +nfs_bwrite(ap) + struct vop_bwrite_args /* { + struct vnode *a_bp; + } */ *ap; +{ + + return (nfs_writebp(ap->a_bp, 1)); +} + +/* + * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless + * the force flag is one and it also handles the B_NEEDCOMMIT flag. + */ +int +nfs_writebp(bp, force) + register struct buf *bp; + int force; +{ + register int oldflags = bp->b_flags, retv = 1; + register struct proc *p = curproc; /* XXX */ + off_t off; + + if(!(bp->b_flags & B_BUSY)) + panic("bwrite: buffer is not busy???"); + + bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI); + + if (oldflags & B_ASYNC) { + if (oldflags & B_DELWRI) { + reassignbuf(bp, bp->b_vp); + } else if (p) { + ++p->p_stats->p_ru.ru_oublock; + } + } + bp->b_vp->v_numoutput++; + + /* + * If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not + * an actual write will have to be scheduled via. VOP_STRATEGY(). + * If B_WRITEINPROG is already set, then push it with a write anyhow. + */ + if (oldflags & (B_NEEDCOMMIT | B_WRITEINPROG) == B_NEEDCOMMIT) { + off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; + bp->b_flags |= B_WRITEINPROG; + retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff, + bp->b_wcred, bp->b_proc); + bp->b_flags &= ~B_WRITEINPROG; + if (!retv) { + bp->b_dirtyoff = bp->b_dirtyend = 0; + bp->b_flags &= ~B_NEEDCOMMIT; + biodone(bp); + } else if (retv == NFSERR_STALEWRITEVERF) + nfs_clearcommit(bp->b_vp->v_mount); + } + if (retv) { + if (force) + bp->b_flags |= B_WRITEINPROG; + VOP_STRATEGY(bp); + } + + if( (oldflags & B_ASYNC) == 0) { + int rtval = biowait(bp); + if (oldflags & B_DELWRI) { + reassignbuf(bp, bp->b_vp); + } else if (p) { + ++p->p_stats->p_ru.ru_oublock; + } + brelse(bp); + return (rtval); + } + + return (0); +} + +/* + * nfs special file access vnode op. + * Essentially just get vattr and then imitate iaccess() since the device is + * local to the client. + */ +int +nfsspec_access(ap) + struct vop_access_args /* { + struct vnode *a_vp; + int a_mode; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap; +{ + register struct vattr *vap; + register gid_t *gp; + register struct ucred *cred = ap->a_cred; + struct vnode *vp = ap->a_vp; + mode_t mode = ap->a_mode; + struct vattr vattr; + register int i; + int error; + + /* + * Disallow write attempts on filesystems mounted read-only; + * unless the file is a socket, fifo, or a block or character + * device resident on the filesystem. + */ + if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { + switch (vp->v_type) { + case VREG: case VDIR: case VLNK: + return (EROFS); + } + } + /* + * If you're the super-user, + * you always get access. + */ + if (cred->cr_uid == 0) + return (0); + vap = &vattr; + error = VOP_GETATTR(vp, vap, cred, ap->a_p); + if (error) + return (error); + /* + * Access check is based on only one of owner, group, public. + * If not owner, then check group. If not a member of the + * group, then check public access. + */ + if (cred->cr_uid != vap->va_uid) { + mode >>= 3; + gp = cred->cr_groups; + for (i = 0; i < cred->cr_ngroups; i++, gp++) + if (vap->va_gid == *gp) + goto found; + mode >>= 3; +found: + ; + } + error = (vap->va_mode & mode) == mode ? 0 : EACCES; + return (error); +} + +/* + * Read wrapper for special devices. + */ +int +nfsspec_read(ap) + struct vop_read_args /* { + struct vnode *a_vp; + struct uio *a_uio; + int a_ioflag; + struct ucred *a_cred; + } */ *ap; +{ + register struct nfsnode *np = VTONFS(ap->a_vp); + + /* + * Set access flag. + */ + np->n_flag |= NACC; + np->n_atim.ts_sec = time.tv_sec; + np->n_atim.ts_nsec = time.tv_usec * 1000; + return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); +} + +/* + * Write wrapper for special devices. + */ +int +nfsspec_write(ap) + struct vop_write_args /* { + struct vnode *a_vp; + struct uio *a_uio; + int a_ioflag; + struct ucred *a_cred; + } */ *ap; +{ + register struct nfsnode *np = VTONFS(ap->a_vp); + + /* + * Set update flag. + */ + np->n_flag |= NUPD; + np->n_mtim.ts_sec = time.tv_sec; + np->n_mtim.ts_nsec = time.tv_usec * 1000; + return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); +} + +/* + * Close wrapper for special devices. + * + * Update the times on the nfsnode then do device close. + */ +int +nfsspec_close(ap) + struct vop_close_args /* { + struct vnode *a_vp; + int a_fflag; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + register struct nfsnode *np = VTONFS(vp); + struct vattr vattr; + + if (np->n_flag & (NACC | NUPD)) { + np->n_flag |= NCHG; + if (vp->v_usecount == 1 && + (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { + VATTR_NULL(&vattr); + if (np->n_flag & NACC) + vattr.va_atime = np->n_atim; + if (np->n_flag & NUPD) + vattr.va_mtime = np->n_mtim; + (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); + } + } + return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); +} + +/* + * Read wrapper for fifos. + */ +int +nfsfifo_read(ap) + struct vop_read_args /* { + struct vnode *a_vp; + struct uio *a_uio; + int a_ioflag; + struct ucred *a_cred; + } */ *ap; +{ + extern int (**fifo_vnodeop_p)(); + register struct nfsnode *np = VTONFS(ap->a_vp); + + /* + * Set access flag. + */ + np->n_flag |= NACC; + np->n_atim.ts_sec = time.tv_sec; + np->n_atim.ts_nsec = time.tv_usec * 1000; + return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); +} + +/* + * Write wrapper for fifos. + */ +int +nfsfifo_write(ap) + struct vop_write_args /* { + struct vnode *a_vp; + struct uio *a_uio; + int a_ioflag; + struct ucred *a_cred; + } */ *ap; +{ + extern int (**fifo_vnodeop_p)(); + register struct nfsnode *np = VTONFS(ap->a_vp); + + /* + * Set update flag. + */ + np->n_flag |= NUPD; + np->n_mtim.ts_sec = time.tv_sec; + np->n_mtim.ts_nsec = time.tv_usec * 1000; + return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); +} + +/* + * Close wrapper for fifos. + * + * Update the times on the nfsnode then do fifo close. + */ +int +nfsfifo_close(ap) + struct vop_close_args /* { + struct vnode *a_vp; + int a_fflag; + struct ucred *a_cred; + struct proc *a_p; + } */ *ap; +{ + register struct vnode *vp = ap->a_vp; + register struct nfsnode *np = VTONFS(vp); + struct vattr vattr; + extern int (**fifo_vnodeop_p)(); + + if (np->n_flag & (NACC | NUPD)) { + if (np->n_flag & NACC) { + np->n_atim.ts_sec = time.tv_sec; + np->n_atim.ts_nsec = time.tv_usec * 1000; + } + if (np->n_flag & NUPD) { + np->n_mtim.ts_sec = time.tv_sec; + np->n_mtim.ts_nsec = time.tv_usec * 1000; + } + np->n_flag |= NCHG; + if (vp->v_usecount == 1 && + (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { + VATTR_NULL(&vattr); + if (np->n_flag & NACC) + vattr.va_atime = np->n_atim; + if (np->n_flag & NUPD) + vattr.va_mtime = np->n_mtim; + (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); + } + } + return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); +} |