/* $NetBSD: nfs_vnops.c,v 1.104 1999/08/02 18:58:23 wrstuden Exp $ */ /* * 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 8.19 (Berkeley) 7/31/95 */ /* * vnode op calls for Sun NFS version 2 and 3 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* Defs */ #define TRUE 1 #define FALSE 0 /* * Global vfs data structures for nfs */ int (**nfsv2_vnodeop_p) __P((void *)); 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_poll_desc, nfs_poll }, /* poll */ { &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 }, /* bwrite */ { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } }; struct vnodeopv_desc nfsv2_vnodeop_opv_desc = { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; /* * Special device vnode ops */ int (**spec_nfsv2nodeop_p) __P((void *)); 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_poll_desc, spec_poll }, /* poll */ { &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 }, /* bwrite */ { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } }; struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; int (**fifo_nfsv2nodeop_p) __P((void *)); 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_poll_desc, fifo_poll }, /* poll */ { &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, genfs_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 }, /* bwrite */ { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } }; struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; /* * Global variables */ extern u_int32_t nfs_true, nfs_false; extern u_int32_t nfs_xdrneg1; extern struct nfsstats nfsstats; extern nfstype nfsv3_type[9]; struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; struct nfsmount *nfs_iodmount[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(v) void *v; { struct vop_access_args /* { struct vnode *a_vp; int a_mode; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; register struct vnode *vp = ap->a_vp; register u_int32_t *tl; register caddr_t cp; register int32_t t1, t2; caddr_t bpos, dpos, cp2; int error = 0, attrflag; struct mbuf *mreq, *mrep, *md, *mb, *mb2; u_int32_t mode, rmode; int v3 = NFS_ISV3(vp); /* * 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_int32_t *, 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); if (ap->a_mode & VEXEC) mode |= NFSV3ACCESS_EXECUTE; } else { if (ap->a_mode & VWRITE) mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | NFSV3ACCESS_DELETE); if (ap->a_mode & VEXEC) mode |= NFSV3ACCESS_LOOKUP; } *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_int32_t *, NFSX_UNSIGNED); rmode = fxdr_unsigned(u_int32_t, *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; if (error) return (error); } else return (nfsspec_access(ap)); /* * 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); default: break; } } return (0); } /* * 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(v) void *v; { struct vop_open_args /* { struct vnode *a_vp; int a_mode; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; 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) { #ifdef DIAGNOSTIC printf("open eacces vtyp=%d\n",vp->v_type); #endif 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) uvm_vnp_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) uvm_vnp_uncache(vp); np->n_attrstamp = 0; if (vp->v_type == VDIR) { nfs_invaldircache(vp, 0); 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.tv_sec; } else { error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); if (error) return (error); if (np->n_mtime != vattr.va_mtime.tv_sec) { if (vp->v_type == VDIR) { nfs_invaldircache(vp, 0); np->n_direofoffset = 0; } if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1)) == EINTR) return (error); (void) uvm_vnp_uncache(vp); np->n_mtime = vattr.va_mtime.tv_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(v) void *v; { 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 = v; 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); np->n_flag &= ~NMODIFIED; } 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(v) void *v; { struct vop_getattr_args /* { struct vnode *a_vp; struct vattr *a_vap; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; register struct vnode *vp = ap->a_vp; register struct nfsnode *np = VTONFS(vp); register caddr_t cp; register u_int32_t *tl; register int32_t 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); if (vp->v_type == VDIR && ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; } nfsm_reqdone; return (error); } /* * nfs setattr call. */ int nfs_setattr(v) void *v; { 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 = v; 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 = 0; /* * Setting of flags is not supported. */ if (vap->va_flags != VNOVAL) return (EOPNOTSUPP); /* * Disallow write attempts if the filesystem is mounted read-only. */ if ((vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_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.tv_sec == VNOVAL && vap->va_atime.tv_sec == VNOVAL && vap->va_mode == (mode_t)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); uvm_vnp_setsize(vp, vap->va_size); 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) { uvm_vnp_setsize(vp, np->n_size); return (error); } tsize = np->n_size; np->n_size = np->n_vattr->va_size = vap->va_size; } } else if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) && 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 && vap->va_size != VNOVAL) { np->n_size = np->n_vattr->va_size = tsize; uvm_vnp_setsize(vp, 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 int32_t t1, t2; caddr_t bpos, dpos, cp2; u_int32_t *tl; int error = 0, wccflag = NFSV3_WCCRATTR; struct mbuf *mreq, *mrep, *md, *mb, *mb2; 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) { nfsm_v3attrbuild(vap, TRUE); nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); *tl = nfs_false; } else { nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); if (vap->va_mode == (mode_t)VNOVAL) sp->sa_mode = nfs_xdrneg1; else sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); if (vap->va_uid == (uid_t)VNOVAL) sp->sa_uid = nfs_xdrneg1; else sp->sa_uid = txdr_unsigned(vap->va_uid); if (vap->va_gid == (gid_t)VNOVAL) sp->sa_gid = nfs_xdrneg1; 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(v) void *v; { struct vop_lookup_args /* { struct vnodeop_desc *a_desc; struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; } */ *ap = v; struct componentname *cnp = ap->a_cnp; struct vnode *dvp = ap->a_dvp; struct vnode **vpp = ap->a_vpp; int flags; struct vnode *newvp; u_int32_t *tl; caddr_t cp; int32_t 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); cnp->cn_flags &= ~PDIRUNLOCK; flags = cnp->cn_flags; *vpp = NULLVP; if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) return (EROFS); 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)) != 0) { struct vattr vattr; int vpid; if (error == ENOENT) { if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc) && vattr.va_mtime.tv_sec == VTONFS(dvp)->n_nctime) return (ENOENT); cache_purge(dvp); np->n_nctime = 0; goto dorpc; } 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); if (!error) { if (vpid == newvp->v_id) { if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) { nfsstats.lookupcache_hits++; if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) cnp->cn_flags |= SAVENAME; if (!lockparent || !(flags & ISLASTCN)) cnp->cn_flags |= PDIRUNLOCK; return (0); } cache_purge(newvp); } vrele(newvp); } *vpp = NULLVP; } dorpc: 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); } error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); if (error) { 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; if (!lockparent || !(flags & ISLASTCN)) cnp->cn_flags |= PDIRUNLOCK; return (0); } if (NFS_CMPFH(np, fhp, fhsize)) { VREF(dvp); newvp = dvp; } else { error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); if (error) { 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.tv_sec; cache_enter(dvp, newvp, cnp); } *vpp = newvp; nfsm_reqdone; if (error) { if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) { if (VTONFS(dvp)->n_nctime == 0) VTONFS(dvp)->n_nctime = VTONFS(dvp)->n_vattr->va_mtime.tv_sec; cache_enter(dvp, NULL, cnp); } 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; } else { if (!lockparent || !(flags & ISLASTCN)) cnp->cn_flags |= PDIRUNLOCK; } return (error); } /* * nfs read call. * Just call nfs_bioread() to do the work. */ int nfs_read(v) void *v; { struct vop_read_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; } */ *ap = v; 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, 0)); } /* * nfs readlink call */ int nfs_readlink(v) void *v; { struct vop_readlink_args /* { struct vnode *a_vp; struct uio *a_uio; struct ucred *a_cred; } */ *ap = v; 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, 0)); } /* * 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_int32_t *tl; register caddr_t cp; register int32_t 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_int32_t *tl; register caddr_t cp; register int32_t 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 > nmp->nm_maxfilesize) 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_int32_t *, 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_int32_t *, 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_int32_t *tl; register caddr_t cp; register int32_t t1, t2, backup; caddr_t bpos, dpos, cp2; struct mbuf *mreq, *mrep, *md, *mb, *mb2; struct nfsmount *nmp = VFSTONFS(vp->v_mount); 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 > nmp->nm_maxfilesize) 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_int32_t *, 5 * NFSX_UNSIGNED); txdr_hyper(uiop->uio_offset, tl); tl += 2; *tl++ = txdr_unsigned(len); *tl++ = txdr_unsigned(*iomode); *tl = txdr_unsigned(len); } else { register u_int32_t x; nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); /* Set both "begin" and "current" to non-garbage. */ x = txdr_unsigned((u_int32_t)uiop->uio_offset); *tl++ = x; /* "begin offset" */ *tl++ = x; /* "current offset" */ x = txdr_unsigned(len); *tl++ = x; /* total to this offset */ *tl = x; /* size of this write */ } 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_int32_t *, 2 * NFSX_UNSIGNED + NFSX_V3WRITEVERF); rlen = fxdr_unsigned(int, *tl++); if (rlen == 0) { error = NFSERR_IO; m_freem(mrep); break; } else if (rlen < len) { backup = len - rlen; (caddr_t)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_iflag & NFSMNT_HASWRITEVERF) == 0){ memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, NFSX_V3WRITEVERF); nmp->nm_iflag |= NFSMNT_HASWRITEVERF; } else if (memcmp((caddr_t)tl, (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { *must_commit = 1; memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, NFSX_V3WRITEVERF); } } } else nfsm_loadattr(vp, (struct vattr *)0); if (wccflag) VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; m_freem(mrep); if (error) break; 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 u_int32_t *tl; register caddr_t cp; register int32_t t1, t2; struct vnode *newvp = (struct vnode *)0; struct nfsnode *np; char *cp2; caddr_t bpos, dpos; int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; struct mbuf *mreq, *mrep, *md, *mb, *mb2; u_int32_t 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 = nfs_xdrneg1; else { VOP_ABORTOP(dvp, cnp); vput(dvp); return (EOPNOTSUPP); } 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_int32_t *, NFSX_UNSIGNED); *tl++ = vtonfsv3_type(vap->va_type); nfsm_v3attrbuild(vap, FALSE); if (vap->va_type == VCHR || vap->va_type == VBLK) { nfsm_build(tl, u_int32_t *, 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 = nfs_xdrneg1; sp->sa_gid = nfs_xdrneg1; 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(v) void *v; { struct vop_mknod_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; } */ *ap = v; 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(v) void *v; { struct vop_create_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; } */ *ap = v; 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 u_int32_t *tl; register caddr_t cp; register int32_t t1, t2; struct nfsnode *np = (struct nfsnode *)0; struct vnode *newvp = (struct vnode *)0; caddr_t bpos, dpos, cp2; int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; struct mbuf *mreq, *mrep, *md, *mb, *mb2; int v3 = NFS_ISV3(dvp); /* * Oops, not for me.. */ if (vap->va_type == VSOCK) return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); #ifdef VA_EXCLUSIVE if (vap->va_vaflags & VA_EXCLUSIVE) fmode |= O_EXCL; #endif again: error = 0; 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_int32_t *, NFSX_UNSIGNED); if (fmode & O_EXCL) { *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); if (in_ifaddr.tqh_first) *tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr; else *tl++ = create_verf; *tl = ++create_verf; } else { *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); nfsm_v3attrbuild(vap, FALSE); } } else { nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); sp->sa_uid = nfs_xdrneg1; sp->sa_gid = nfs_xdrneg1; 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(v) void *v; { struct vop_remove_args /* { struct vnodeop_desc *a_desc; struct vnode * a_dvp; struct vnode * a_vp; struct componentname * a_cnp; } */ *ap = v; 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); int error = 0; struct vattr vattr; #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_type == VDIR) error = EPERM; else 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; const char *name; int namelen; struct ucred *cred; struct proc *proc; { register u_int32_t *tl; register caddr_t cp; register int32_t 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(v) void *v; { 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 = v; 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 && tvp->v_type != VDIR && !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; const char *fnameptr; int fnamelen; register struct vnode *tdvp; const char *tnameptr; int tnamelen; struct ucred *cred; struct proc *proc; { register u_int32_t *tl; register caddr_t cp; register int32_t 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(v) void *v; { struct vop_link_args /* { struct vnode *a_dvp; struct vnode *a_vp; struct componentname *a_cnp; } */ *ap = v; register struct vnode *vp = ap->a_vp; register struct vnode *dvp = ap->a_dvp; register struct componentname *cnp = ap->a_cnp; register u_int32_t *tl; register caddr_t cp; register int32_t t1, t2; caddr_t bpos, dpos, cp2; int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; struct mbuf *mreq, *mrep, *md, *mb, *mb2; int v3; if (dvp->v_mount != vp->v_mount) { VOP_ABORTOP(vp, cnp); vput(dvp); 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, FSYNC_WAIT, cnp->cn_proc); v3 = NFS_ISV3(vp); 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(dvp, 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(dvp, wccflag); } nfsm_reqdone; FREE(cnp->cn_pnbuf, M_NAMEI); VTONFS(dvp)->n_flag |= NMODIFIED; if (!attrflag) VTONFS(vp)->n_attrstamp = 0; if (!wccflag) VTONFS(dvp)->n_attrstamp = 0; vput(dvp); /* * 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(v) void *v; { struct vop_symlink_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; char *a_target; } */ *ap = v; 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 u_int32_t *tl; register caddr_t cp; register int32_t 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_v3attrbuild(vap, FALSE); 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 = nfs_xdrneg1; sp->sa_gid = nfs_xdrneg1; sp->sa_size = nfs_xdrneg1; 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(v) void *v; { struct vop_mkdir_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; } */ *ap = v; 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 u_int32_t *tl; register caddr_t cp; register int32_t t1, t2; register int len; struct nfsnode *np = (struct nfsnode *)0; struct vnode *newvp = (struct vnode *)0; caddr_t bpos, dpos, cp2; int error = 0, wccflag = NFSV3_WCCRATTR; int gotvp = 0; struct mbuf *mreq, *mrep, *md, *mb, *mb2; int v3 = NFS_ISV3(dvp); 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_v3attrbuild(vap, FALSE); } else { nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); sp->sa_uid = nfs_xdrneg1; sp->sa_gid = nfs_xdrneg1; sp->sa_size = nfs_xdrneg1; 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 { if (cnp->cn_flags & MAKEENTRY) cache_enter(dvp, newvp, cnp); *ap->a_vpp = newvp; } FREE(cnp->cn_pnbuf, M_NAMEI); vrele(dvp); return (error); } /* * nfs remove directory call */ int nfs_rmdir(v) void *v; { struct vop_rmdir_args /* { struct vnode *a_dvp; struct vnode *a_vp; struct componentname *a_cnp; } */ *ap = v; register struct vnode *vp = ap->a_vp; register struct vnode *dvp = ap->a_dvp; register struct componentname *cnp = ap->a_cnp; register u_int32_t *tl; register caddr_t cp; register int32_t 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(v) void *v; { struct vop_readdir_args /* { struct vnode *a_vp; struct uio *a_uio; struct ucred *a_cred; int *a_eofflag; off_t **a_cookies; int *a_ncookies; } */ *ap = v; register struct vnode *vp = ap->a_vp; register struct uio *uio = ap->a_uio; struct nfsmount *nmp = VFSTONFS(vp->v_mount); char *base = uio->uio_iov->iov_base; int tresid, error; size_t count, lost; struct dirent *dp; off_t *cookies = NULL; int ncookies = 0, nc; if (vp->v_type != VDIR) return (EPERM); lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); count = uio->uio_resid - lost; if (count <= 0) return (EINVAL); /* * Call nfs_bioread() to do the real work. */ tresid = uio->uio_resid = count; error = nfs_bioread(vp, uio, 0, ap->a_cred, ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); if (!error && ap->a_cookies) { ncookies = count / 16; MALLOC(cookies, off_t *, sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); *ap->a_cookies = cookies; } if (!error && uio->uio_resid == tresid) { uio->uio_resid += lost; nfsstats.direofcache_misses++; if (ap->a_cookies) *ap->a_ncookies = 0; *ap->a_eofflag = 1; return (0); } if (!error && ap->a_cookies) { /* * Only the NFS server and emulations use cookies, and they * load the directory block into system space, so we can * just look at it directly. */ if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) panic("nfs_readdir: lost in space"); for (nc = 0; ncookies-- && base < (char *)uio->uio_iov->iov_base; nc++){ dp = (struct dirent *) base; if (dp->d_reclen == 0) break; if (nmp->nm_flag & NFSMNT_XLATECOOKIE) *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); else *(cookies++) = NFS_GETCOOKIE(dp); base += dp->d_reclen; } uio->uio_resid += ((caddr_t)uio->uio_iov->iov_base - base); uio->uio_iov->iov_len += ((caddr_t)uio->uio_iov->iov_base - base); uio->uio_iov->iov_base = base; *ap->a_ncookies = nc; } uio->uio_resid += lost; *ap->a_eofflag = 0; 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 = NULL; register u_int32_t *tl; register caddr_t cp; register int32_t t1, t2; caddr_t bpos, dpos, cp2; struct mbuf *mreq, *mrep, *md, *mb, *mb2; struct nfsmount *nmp = VFSTONFS(vp->v_mount); struct nfsnode *dnp = VTONFS(vp); u_quad_t fileno; int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; int attrflag, nrpcs = 0, reclen; int v3 = NFS_ISV3(vp); nfsquad_t cookie; #ifdef DIAGNOSTIC /* * Should be called from buffer cache, so only amount of * NFS_DIRBLKSIZ will be requested. */ if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) panic("nfs readdirrpc bad uio"); #endif /* * Loop around doing readdir rpc's of size nm_readdirsize * truncated to a multiple of NFS_DIRFRAGSIZ. * The stopping criteria is EOF or buffer full. */ while (more_dirs && bigenough) { /* * Heuristic: don't bother to do another RPC to further * fill up this block if there is not much room left. (< 50% * of the readdir RPC size). This wastes some buffer space * but can save up to 50% in RPC calls. */ if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { bigenough = 0; break; } 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_int32_t *, 5 * NFSX_UNSIGNED); cookie.qval = uiop->uio_offset; if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { txdr_swapcookie3(uiop->uio_offset, tl); } else { txdr_cookie3(uiop->uio_offset, tl); } tl += 2; *tl++ = dnp->n_cookieverf.nfsuquad[0]; *tl++ = dnp->n_cookieverf.nfsuquad[1]; } else { nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); *tl++ = txdr_unsigned(uiop->uio_offset); } *tl = txdr_unsigned(nmp->nm_readdirsize); nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred); nrpcs++; if (v3) { nfsm_postop_attr(vp, attrflag); if (!error) { nfsm_dissect(tl, u_int32_t *, 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_int32_t *, 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_int32_t *, 3 * NFSX_UNSIGNED); fileno = fxdr_hyper(tl); len = fxdr_unsigned(int, *(tl + 2)); } else { nfsm_dissect(tl, u_int32_t *, 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 */ tlen += sizeof (off_t) + sizeof (int); reclen = ALIGN(tlen + DIRHDSIZ); tlen = reclen - DIRHDSIZ; left = NFS_DIRFRAGSIZ - blksiz; if (reclen > left) { dp->d_reclen += left; (caddr_t)uiop->uio_iov->iov_base += left; uiop->uio_iov->iov_len -= left; uiop->uio_resid -= left; blksiz = 0; NFS_STASHCOOKIE(dp, uiop->uio_offset); } if (reclen > 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 = reclen; dp->d_type = DT_UNKNOWN; blksiz += dp->d_reclen; if (blksiz == NFS_DIRFRAGSIZ) blksiz = 0; uiop->uio_resid -= DIRHDSIZ; (caddr_t)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 */ (caddr_t)uiop->uio_iov->iov_base += tlen; uiop->uio_iov->iov_len -= tlen; uiop->uio_resid -= tlen; } else nfsm_adv(nfsm_rndup(len)); if (v3) { nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); } else { nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); } if (bigenough) { if (v3) { if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) uiop->uio_offset = fxdr_swapcookie3(tl); else uiop->uio_offset = fxdr_cookie3(tl); } else { uiop->uio_offset = fxdr_unsigned(off_t, *tl); } NFS_STASHCOOKIE(dp, uiop->uio_offset); } 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_int32_t *, NFSX_UNSIGNED); more_dirs = (fxdr_unsigned(int, *tl) == 0); } m_freem(mrep); } /* * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ * by increasing d_reclen for the last record. */ if (blksiz > 0) { left = NFS_DIRFRAGSIZ - blksiz; dp->d_reclen += left; NFS_STASHCOOKIE(dp, uiop->uio_offset); (caddr_t)uiop->uio_iov->iov_base += left; uiop->uio_iov->iov_len -= 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; 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 = NULL; register u_int32_t *tl; register caddr_t cp; register int32_t t1, t2; struct vnode *newvp; caddr_t bpos, dpos, cp2; struct mbuf *mreq, *mrep, *md, *mb, *mb2; struct nameidata nami, *ndp = &nami; struct componentname *cnp = &ndp->ni_cnd; struct nfsmount *nmp = VFSTONFS(vp->v_mount); struct nfsnode *dnp = VTONFS(vp), *np; const unsigned char *hcp; nfsfh_t *fhp; u_quad_t fileno; int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; int attrflag, fhsize, nrpcs = 0, reclen; struct nfs_fattr fattr, *fp; #ifdef DIAGNOSTIC if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) panic("nfs readdirplusrpc bad uio"); #endif ndp->ni_dvp = vp; newvp = NULLVP; /* * Loop around doing readdir rpc's of size nm_readdirsize * truncated to a multiple of NFS_DIRFRAGSIZ. * The stopping criteria is EOF or buffer full. */ while (more_dirs && bigenough) { if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { bigenough = 0; break; } nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; nfsm_reqhead(vp, NFSPROC_READDIRPLUS, NFSX_FH(1) + 6 * NFSX_UNSIGNED); nfsm_fhtom(vp, 1); nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { txdr_swapcookie3(uiop->uio_offset, tl); } else { txdr_cookie3(uiop->uio_offset, tl); } tl += 2; *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; } nrpcs++; nfsm_dissect(tl, u_int32_t *, 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_int32_t *, 3 * NFSX_UNSIGNED); fileno = fxdr_hyper(tl); 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*/ tlen += sizeof (off_t) + sizeof (int); reclen = ALIGN(tlen + DIRHDSIZ); tlen = reclen - DIRHDSIZ; left = NFS_DIRFRAGSIZ - blksiz; if (reclen > left) { /* * DIRFRAGSIZ is aligned, no need to align * again here. */ dp->d_reclen += left; (caddr_t)uiop->uio_iov->iov_base += left; uiop->uio_iov->iov_len -= left; uiop->uio_resid -= left; NFS_STASHCOOKIE(dp, uiop->uio_offset); blksiz = 0; } if (reclen > 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 = reclen; dp->d_type = DT_UNKNOWN; blksiz += dp->d_reclen; if (blksiz == NFS_DIRFRAGSIZ) blksiz = 0; uiop->uio_resid -= DIRHDSIZ; (caddr_t)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'; (caddr_t)uiop->uio_iov->iov_base += tlen; uiop->uio_iov->iov_len -= tlen; uiop->uio_resid -= tlen; } else nfsm_adv(nfsm_rndup(len)); nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); if (bigenough) { if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) uiop->uio_offset = fxdr_swapcookie3(tl); else uiop->uio_offset = fxdr_cookie3(tl); NFS_STASHCOOKIE(dp, uiop->uio_offset); } 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) { nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); memcpy(&fattr, fp, NFSX_V3FATTR); nfsm_dissect(tl, u_int32_t *, 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 { error = nfs_nget(vp->v_mount, fhp, fhsize, &np); if (!error) newvp = NFSTOV(np); } if (!error) { nfs_loadattrcache(&newvp, &fattr, 0); dp->d_type = IFTODT(VTTOIF(np->n_vattr->va_type)); ndp->ni_vp = newvp; cnp->cn_hash = 0; for (hcp = cnp->cn_nameptr, i = 1; i <= len; i++, hcp++) cnp->cn_hash += *hcp * 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_int32_t *, NFSX_UNSIGNED); i = fxdr_unsigned(int, *tl); nfsm_adv(nfsm_rndup(i)); } if (newvp != NULLVP) { vrele(newvp); newvp = NULLVP; } nfsm_dissect(tl, u_int32_t *, 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_int32_t *, NFSX_UNSIGNED); more_dirs = (fxdr_unsigned(int, *tl) == 0); } m_freem(mrep); } /* * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ * by increasing d_reclen for the last record. */ if (blksiz > 0) { left = NFS_DIRFRAGSIZ - blksiz; dp->d_reclen += left; NFS_STASHCOOKIE(dp, uiop->uio_offset); (caddr_t)uiop->uio_iov->iov_base += left; uiop->uio_iov->iov_len -= 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; 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; memcpy(sp->s_name, ".nfsAxxxx4.4", 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; } } error = nfs_renameit(dvp, cnp, sp); if (error) 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; const char *name; int len; struct ucred *cred; struct proc *procp; struct nfsnode **npp; { register u_int32_t *tl; register caddr_t cp; register int32_t 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); memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, 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_int32_t *tl; register int32_t 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_iflag & 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_int32_t *, 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_int32_t *, NFSX_V3WRITEVERF); if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, NFSX_V3WRITEVERF)) { memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl, 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 memcpy() and also it currently happens in the * context of the swapper process (2). */ int nfs_bmap(v) void *v; { struct vop_bmap_args /* { struct vnode *a_vp; daddr_t a_bn; struct vnode **a_vpp; daddr_t *a_bnp; int *a_runp; } */ *ap = v; 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(v) void *v; { struct vop_strategy_args *ap = v; register struct buf *bp = ap->a_bp; struct ucred *cr; struct proc *p; int error = 0; if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) panic("nfs physio/async"); 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(v) void *v; { #if 0 struct vop_mmap_args /* { struct vnode *a_vp; int a_fflags; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; #endif return (EINVAL); } /* * fsync vnode op. Just call nfs_flush() with commit == 1. */ /* ARGSUSED */ int nfs_fsync(v) void *v; { struct vop_fsync_args /* { struct vnodeop_desc *a_desc; struct vnode * a_vp; struct ucred * a_cred; int a_flags; struct proc * a_p; } */ *ap = v; return (nfs_flush(ap->a_vp, ap->a_cred, (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, 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; struct ucred* wcred = NULL; #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); /* * Work out if all buffers are using the same cred * so we can deal with them all with one commit. */ if (wcred == NULL) wcred = bp->b_wcred; else if (wcred != bp->b_wcred) wcred = NOCRED; 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. * If all bufs are using the same wcred, then use that with * one call for all of them, otherwise commit each one * separately. */ if (wcred != NOCRED) retv = nfs_commit(vp, off, (int)(endoff - off), wcred, p); else { retv = 0; for (i = 0; i < bvecpos; i++) { off_t off, size; bp = bvec[i]; off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff; size = (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); retv = nfs_commit(vp, off, (int)size, bp->b_wcred, p); if (retv) break; } } 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) { #if 0 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. * * N.B. The NFS V2 protocol doesn't support this RPC. */ /* ARGSUSED */ int nfs_pathconf(v) void *v; { struct vop_pathconf_args /* { struct vnode *a_vp; int a_name; register_t *a_retval; } */ *ap = v; struct nfsv3_pathconf *pcp; struct vnode *vp = ap->a_vp; struct nfsmount *nmp; struct mbuf *mreq, *mrep, *md, *mb, *mb2; int32_t t1, t2; u_int32_t *tl; caddr_t bpos, dpos, cp, cp2; int error = 0, attrflag; unsigned int l; u_int64_t maxsize; int v3 = NFS_ISV3(vp); switch (ap->a_name) { /* Names that can be resolved locally. */ case _PC_PIPE_BUF: *ap->a_retval = PIPE_BUF; break; case _PC_SYNC_IO: *ap->a_retval = 1; break; /* Names that cannot be resolved locally; do an RPC, if possible. */ case _PC_LINK_MAX: case _PC_NAME_MAX: case _PC_CHOWN_RESTRICTED: case _PC_NO_TRUNC: if (!v3) { error = EINVAL; break; } nfsstats.rpccnt[NFSPROC_PATHCONF]++; nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1)); nfsm_fhtom(vp, 1); nfsm_request(vp, NFSPROC_PATHCONF, curproc, curproc->p_ucred); /* XXX */ nfsm_postop_attr(vp, attrflag); if (!error) { nfsm_dissect(pcp, struct nfsv3_pathconf *, NFSX_V3PATHCONF); switch (ap->a_name) { case _PC_LINK_MAX: *ap->a_retval = fxdr_unsigned(register_t, pcp->pc_linkmax); break; case _PC_NAME_MAX: *ap->a_retval = fxdr_unsigned(register_t, pcp->pc_namemax); break; case _PC_CHOWN_RESTRICTED: *ap->a_retval = (pcp->pc_chownrestricted == nfs_true); break; case _PC_NO_TRUNC: *ap->a_retval = (pcp->pc_notrunc == nfs_true); break; } } nfsm_reqdone; break; case _PC_FILESIZEBITS: if (v3) { nmp = VFSTONFS(vp->v_mount); if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) if ((error = nfs_fsinfo(nmp, vp, curproc->p_ucred, curproc)) != 0) /* XXX */ break; for (l = 0, maxsize = nmp->nm_maxfilesize; (maxsize >> l) > 0; l++) ; *ap->a_retval = l + 1; } else { *ap->a_retval = 32; /* NFS V2 limitation */ } break; default: error = EINVAL; break; } return (error); } /* * NFS advisory byte-level locks. */ int nfs_advlock(v) void *v; { struct vop_advlock_args /* { struct vnode *a_vp; caddr_t a_id; int a_op; struct flock *a_fl; int a_flags; } */ *ap = v; register struct nfsnode *np = VTONFS(ap->a_vp); return (lf_advlock(&np->n_lockf, np->n_size, ap->a_id, ap->a_op, ap->a_fl, ap->a_flags)); } /* * Print out the contents of an nfsnode. */ int nfs_print(v) void *v; { struct vop_print_args /* { struct vnode *a_vp; } */ *ap = v; 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 file truncation. */ int nfs_truncate(v) void *v; { #if 0 struct vop_truncate_args /* { struct vnode *a_vp; off_t a_length; int a_flags; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; #endif /* Use nfs_setattr */ return (EOPNOTSUPP); } /* * NFS update. */ int nfs_update(v) void *v; #if 0 struct vop_update_args /* { struct vnode *a_vp; struct timespec *a_ta; struct timespec *a_tm; int a_waitfor; } */ *ap = v; #endif { /* Use nfs_setattr */ return (EOPNOTSUPP); } /* * Just call nfs_writebp() with the force argument set to 1. */ int nfs_bwrite(v) void *v; { struct vop_bwrite_args /* { struct vnode *a_bp; } */ *ap = v; 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???"); #ifdef fvdl_debug printf("nfs_writebp(%x): vp %x voff %d vend %d doff %d dend %d\n", bp, bp->b_vp, bp->b_validoff, bp->b_validend, bp->b_dirtyoff, bp->b_dirtyend); #endif bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI|B_AGE); 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(v) void *v; { struct vop_access_args /* { struct vnode *a_vp; int a_mode; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; struct vattr va; struct vnode *vp = ap->a_vp; int error; error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); if (error) return (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 ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { switch (vp->v_type) { case VREG: case VDIR: case VLNK: return (EROFS); default: break; } } return (vaccess(va.va_type, va.va_mode, va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); } /* * Read wrapper for special devices. */ int nfsspec_read(v) void *v; { struct vop_read_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; } */ *ap = v; register struct nfsnode *np = VTONFS(ap->a_vp); /* * Set access flag. */ np->n_flag |= NACC; np->n_atim.tv_sec = time.tv_sec; np->n_atim.tv_nsec = time.tv_usec * 1000; return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); } /* * Write wrapper for special devices. */ int nfsspec_write(v) void *v; { struct vop_write_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; } */ *ap = v; register struct nfsnode *np = VTONFS(ap->a_vp); /* * Set update flag. */ np->n_flag |= NUPD; np->n_mtim.tv_sec = time.tv_sec; np->n_mtim.tv_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(v) void *v; { struct vop_close_args /* { struct vnode *a_vp; int a_fflag; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; 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(v) void *v; { struct vop_read_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; } */ *ap = v; extern int (**fifo_vnodeop_p) __P((void *)); register struct nfsnode *np = VTONFS(ap->a_vp); /* * Set access flag. */ np->n_flag |= NACC; np->n_atim.tv_sec = time.tv_sec; np->n_atim.tv_nsec = time.tv_usec * 1000; return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); } /* * Write wrapper for fifos. */ int nfsfifo_write(v) void *v; { struct vop_write_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; } */ *ap = v; extern int (**fifo_vnodeop_p) __P((void *)); register struct nfsnode *np = VTONFS(ap->a_vp); /* * Set update flag. */ np->n_flag |= NUPD; np->n_mtim.tv_sec = time.tv_sec; np->n_mtim.tv_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(v) void *v; { struct vop_close_args /* { struct vnode *a_vp; int a_fflag; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; register struct vnode *vp = ap->a_vp; register struct nfsnode *np = VTONFS(vp); struct vattr vattr; extern int (**fifo_vnodeop_p) __P((void *)); if (np->n_flag & (NACC | NUPD)) { if (np->n_flag & NACC) { np->n_atim.tv_sec = time.tv_sec; np->n_atim.tv_nsec = time.tv_usec * 1000; } if (np->n_flag & NUPD) { np->n_mtim.tv_sec = time.tv_sec; np->n_mtim.tv_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)); }