678 lines
17 KiB
C
678 lines
17 KiB
C
/* $NetBSD: smbfs_io.c,v 1.1 2000/12/07 03:33:46 deberg Exp $ */
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/*
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* Copyright (c) 2000, Boris Popov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Boris Popov.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/resourcevar.h> /* defines plimit structure in proc struct */
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/fcntl.h>
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#include <sys/mount.h>
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#include <sys/namei.h>
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#include <sys/vnode.h>
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#include <sys/dirent.h>
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#include <sys/signalvar.h>
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#include <uvm/uvm_extern.h>
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#include <sys/sysctl.h>
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#ifndef NetBSD
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#if __FreeBSD_version < 400000
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#include <vm/vm_prot.h>
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#endif
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#endif
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#include <uvm/uvm_page.h>
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#include <uvm/uvm_object.h>
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#include <uvm/uvm_pager.h>
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#ifndef NetBSD
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#include <vm/vnode_pager.h>
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#endif
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/*
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#include <sys/ioccom.h>
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*/
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#include <netsmb/smb.h>
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#include <netsmb/smb_conn.h>
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#include <netsmb/smb_subr.h>
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#include <netsmb/smb_lock.h>
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#include <smbfs/smbfs.h>
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#include <smbfs/smbfs_node.h>
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#include <smbfs/smbfs_subr.h>
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#ifdef FB_CURRENT
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#include <sys/bio.h>
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#else
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#define bufdone biodone
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#endif
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#include <sys/buf.h>
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/*#define SMBFS_RWGENERIC*/
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extern int smbfs_pbuf_freecnt;
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static int smbfs_fastlookup = 1;
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extern struct linker_set sysctl_vfs_smbfs;
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#ifdef SYSCTL_DECL
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SYSCTL_DECL(_vfs_smbfs);
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#endif
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#ifndef NetBSD
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SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, "");
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#endif
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#define DE_SIZE (sizeof(struct dirent))
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static int
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smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred)
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{
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struct dirent de;
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struct componentname cn;
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struct smb_cred scred;
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struct smbfs_fctx *ctx;
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struct vnode *newvp;
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struct smbnode *np = VTOSMB(vp);
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int error/*, *eofflag = ap->a_eofflag*/;
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long offset, limit;
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const unsigned char *hcp;
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int i;
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np = VTOSMB(vp);
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SMBVDEBUG("dirname='%s'\n", np->n_name);
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if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0)
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return EINVAL;
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smb_makescred(&scred, uio->uio_procp, cred);
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offset = uio->uio_offset / DE_SIZE; /* offset in the directory */
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limit = uio->uio_resid / DE_SIZE;
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while (limit && offset < 2) {
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limit--;
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bzero((caddr_t)&de, DE_SIZE);
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de.d_reclen = DE_SIZE;
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de.d_fileno = (offset == 0) ? np->n_ino :
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(np->n_parent ? np->n_parent->n_ino : 2);
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if (de.d_fileno == 0)
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de.d_fileno = 0x7ffffffd + offset;
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de.d_namlen = offset + 1;
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de.d_name[0] = '.';
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de.d_name[1] = '.';
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de.d_name[offset + 1] = '\0';
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de.d_type = DT_DIR;
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error = uiomove((caddr_t)&de, DE_SIZE, uio);
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if (error)
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return error;
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offset++;
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uio->uio_offset += DE_SIZE;
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}
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if (limit == 0)
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return 0;
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if (offset != np->n_dirofs || np->n_dirseq == NULL) {
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SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs);
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if (np->n_dirseq) {
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smbfs_findclose(np->n_dirseq, &scred);
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np->n_dirseq = NULL;
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}
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np->n_dirofs = 2;
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error = smbfs_findopen(np, "*", 1,
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SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR,
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&scred, &ctx);
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if (error) {
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SMBVDEBUG("can not open search, error = %d", error);
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return error;
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}
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np->n_dirseq = ctx;
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} else
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ctx = np->n_dirseq;
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while (np->n_dirofs < offset) {
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error = smbfs_findnext(ctx, offset - np->n_dirofs++, &scred);
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if (error) {
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smbfs_findclose(np->n_dirseq, &scred);
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np->n_dirseq = NULL;
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return error == ENOENT ? 0 : error;
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}
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}
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error = 0;
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for (; limit; limit--, offset++) {
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bzero((caddr_t)&de, DE_SIZE);
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de.d_reclen = DE_SIZE;
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error = smbfs_findnext(ctx, limit, &scred);
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if (error)
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break;
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np->n_dirofs++;
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de.d_fileno = ctx->f_attr.fa_ino;
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de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG;
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de.d_namlen = ctx->f_nmlen;
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bcopy(ctx->f_name, de.d_name, de.d_namlen);
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de.d_name[de.d_namlen] = '\0';
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if (smbfs_fastlookup && de.d_namlen <= NCHNAMLEN) {
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error = smbfs_nget(vp->v_mount, vp, ctx->f_name,
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ctx->f_nmlen, &ctx->f_attr, &newvp);
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if (!error) {
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cn.cn_nameptr = de.d_name;
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cn.cn_namelen = de.d_namlen;
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cn.cn_hash = 0;
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for (hcp = cn.cn_nameptr, i = 1;
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i <= cn.cn_namelen;
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i++, hcp++)
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cn.cn_hash += *hcp * i;
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cache_enter(vp, newvp, &cn);
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vput(newvp);
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}
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}
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error = uiomove((caddr_t)&de, DE_SIZE, uio);
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if (error)
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break;
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}
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if (error == ENOENT)
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error = 0;
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uio->uio_offset = offset * DE_SIZE;
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return error;
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}
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int
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smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) {
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struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
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struct smbnode *np = VTOSMB(vp);
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struct proc *p;
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struct vattr vattr;
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struct smb_cred scred;
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int error;
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if (vp->v_type != VREG && vp->v_type != VDIR) {
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SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
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return EIO;
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}
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if (uiop->uio_resid == 0)
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return 0;
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if (uiop->uio_offset < 0)
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return EINVAL;
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/* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
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return EFBIG;*/
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if (vp->v_type == VDIR) {
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error = simple_spinlock(&np->n_rdirlock, 0);
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if (error)
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return error;
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error = smbfs_readvdir(vp, uiop, cred);
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simple_spinunlock(&np->n_rdirlock);
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return error;
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}
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p = uiop->uio_procp;
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/* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
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if (np->n_flag & NMODIFIED) {
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smbfs_attr_cacheremove(vp);
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error = VOP_GETATTR(vp, &vattr, cred, p);
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if (error)
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return error;
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np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
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} else {
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error = VOP_GETATTR(vp, &vattr, cred, p);
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if (error)
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return error;
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if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
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error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
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if (error)
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return error;
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np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
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}
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}
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smb_makescred(&scred, p, cred);
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return smb_read(smp->sm_share, np->n_fid, uiop, &scred);
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}
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int
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smbfs_writevnode(struct vnode *vp, struct uio *uiop,
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struct ucred *cred, int ioflag)
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{
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struct smbmount *smp = VTOSMBFS(vp);
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struct smbnode *np = VTOSMB(vp);
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struct smb_cred scred;
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struct proc *p;
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int error = 0;
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if (vp->v_type != VREG) {
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SMBERROR("vn types other than VREG unsupported !\n");
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return EIO;
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}
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SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
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if (uiop->uio_offset < 0)
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return EINVAL;
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/* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
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return (EFBIG);*/
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p = uiop->uio_procp;
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if (ioflag & (IO_APPEND | IO_SYNC)) {
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if (np->n_flag & NMODIFIED) {
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smbfs_attr_cacheremove(vp);
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error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
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if (error)
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return error;
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}
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if (ioflag & IO_APPEND) {
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#if notyet
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/*
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* File size can be changed by another client
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*/
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smbfs_attr_cacheremove(vp);
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error = VOP_GETATTR(vp, &vattr, cred, p);
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if (error) return (error);
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#endif
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uiop->uio_offset = np->n_size;
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}
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}
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if (uiop->uio_resid == 0)
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return 0;
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if (p && uiop->uio_offset + uiop->uio_resid > p->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
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psignal(p, SIGXFSZ);
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return EFBIG;
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}
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smb_makescred(&scred, p, cred);
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error = smb_write(smp->sm_share, np->n_fid, uiop, &scred);
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SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
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if (!error) {
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if (uiop->uio_offset > np->n_size) {
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np->n_size = uiop->uio_offset;
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#ifndef NetBSD
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vnode_pager_setsize(vp, np->n_size);
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#else
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uvm_vnp_setsize(vp, np->n_size);
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#endif
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}
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}
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return error;
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}
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/*
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* Do an I/O operation to/from a cache block.
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*/
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int
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smbfs_doio(struct buf *bp, struct ucred *cr, struct proc *p)
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{
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struct vnode *vp = bp->b_vp;
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struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
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struct smbnode *np = VTOSMB(vp);
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struct uio uio, *uiop = &uio;
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struct iovec io;
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struct smb_cred scred;
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int error = 0;
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uiop->uio_iov = &io;
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uiop->uio_iovcnt = 1;
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uiop->uio_segflg = UIO_SYSSPACE;
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uiop->uio_procp = p;
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smb_makescred(&scred, p, cr);
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#ifdef FB_CURRENT
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if (bp->b_iocmd == BIO_READ) {
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#else
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if (bp->b_flags & B_READ) {
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#endif
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io.iov_len = uiop->uio_resid = bp->b_bcount;
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io.iov_base = bp->b_data;
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uiop->uio_rw = UIO_READ;
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switch (vp->v_type) {
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case VREG:
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uiop->uio_offset = ((off_t)bp->b_blkno) << DEV_BSHIFT;
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error = smb_read(smp->sm_share, np->n_fid, uiop, &scred);
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if (error)
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break;
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if (uiop->uio_resid) {
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int left = uiop->uio_resid;
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int nread = bp->b_bcount - left;
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if (left > 0)
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bzero((char *)bp->b_data + nread, left);
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}
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break;
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/* case VDIR:
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nfsstats.readdir_bios++;
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uiop->uio_offset = ((u_quad_t)bp->b_lblkno) * NFS_DIRBLKSIZ;
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if (smp->nm_flag & NFSMNT_RDIRPLUS) {
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error = nfs_readdirplusrpc(vp, uiop, cr);
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if (error == NFSERR_NOTSUPP)
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smp->nm_flag &= ~NFSMNT_RDIRPLUS;
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}
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if ((smp->nm_flag & NFSMNT_RDIRPLUS) == 0)
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error = nfs_readdirrpc(vp, uiop, cr);
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if (error == 0 && uiop->uio_resid == bp->b_bcount)
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bp->b_ioflags |= BIO_INVAL;
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break;
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*/
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default:
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printf("smbfs_doio: type %x unexpected\n",vp->v_type);
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break;
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};
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if (error) {
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bp->b_error = error;
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#ifdef FB_CURRENT
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bp->b_ioflags |= BIO_ERROR;
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#else
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bp->b_flags |= B_ERROR;
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#endif
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}
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} else { /* write */
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io.iov_base = bp->b_data;
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io.iov_len = uiop->uio_resid = bp->b_bcount;
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uiop->uio_offset = (((off_t)bp->b_blkno) << DEV_BSHIFT);
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uiop->uio_rw = UIO_WRITE;
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/* bp->b_flags |= B_WRITEINPROG; */
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error = smb_write(smp->sm_share, np->n_fid, uiop, &scred);
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/* bp->b_flags &= ~B_WRITEINPROG; */
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}
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bp->b_resid = uiop->uio_resid;
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bufdone(bp);
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return error;
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}
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#ifndef NetBSD
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/*
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* Vnode op for VM getpages.
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* Wish wish .... get rid from multiple IO routines
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*/
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int
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smbfs_getpages(ap)
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struct vop_getpages_args /* {
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struct vnode *a_vp;
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vm_page_t *a_m;
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int a_count;
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int a_reqpage;
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vm_ooffset_t a_offset;
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} */ *ap;
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{
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#ifdef SMBFS_RWGENERIC
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return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
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ap->a_reqpage);
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#else
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int i, error, nextoff, size, toff, npages, count;
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struct uio uio;
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struct iovec iov;
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vm_offset_t kva;
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struct buf *bp;
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struct vnode *vp;
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struct proc *p;
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struct ucred *cred;
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struct smbmount *smp;
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struct smbnode *np;
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struct smb_cred scred;
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vm_page_t *pages;
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vp = ap->a_vp;
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p = curproc; /* XXX */
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cred = curproc->p_ucred; /* XXX */
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np = VTOSMB(vp);
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smp = VFSTOSMBFS(vp->v_mount);
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pages = ap->a_m;
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count = ap->a_count;
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if (vp->v_object == NULL) {
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printf("smbfs_getpages: called with non-merged cache vnode??\n");
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return VM_PAGER_ERROR;
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}
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smb_makescred(&scred, p, cred);
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#if __FreeBSD_version >= 400000
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bp = getpbuf(&smbfs_pbuf_freecnt);
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#else
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bp = getpbuf();
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#endif
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npages = btoc(count);
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kva = (vm_offset_t) bp->b_data;
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pmap_qenter(kva, pages, npages);
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iov.iov_base = (caddr_t) kva;
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iov.iov_len = count;
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uio.uio_iov = &iov;
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uio.uio_iovcnt = 1;
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uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
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uio.uio_resid = count;
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uio.uio_segflg = UIO_SYSSPACE;
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uio.uio_rw = UIO_READ;
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uio.uio_procp = p;
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error = smb_read(smp->sm_share, np->n_fid, &uio, &scred);
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pmap_qremove(kva, npages);
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|
#if __FreeBSD_version >= 400000
|
|
relpbuf(bp, &smbfs_pbuf_freecnt);
|
|
#else
|
|
relpbuf(bp);
|
|
#endif
|
|
|
|
if (error && (uio.uio_resid == count)) {
|
|
printf("smbfs_getpages: error %d\n",error);
|
|
for (i = 0; i < npages; i++) {
|
|
if (ap->a_reqpage != i)
|
|
vnode_pager_freepage(pages[i]);
|
|
}
|
|
return VM_PAGER_ERROR;
|
|
}
|
|
|
|
size = count - uio.uio_resid;
|
|
|
|
for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
|
|
vm_page_t m;
|
|
nextoff = toff + PAGE_SIZE;
|
|
m = pages[i];
|
|
|
|
m->flags &= ~PG_ZERO;
|
|
|
|
if (nextoff <= size) {
|
|
m->valid = VM_PAGE_BITS_ALL;
|
|
m->dirty = 0;
|
|
} else {
|
|
int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1);
|
|
vm_page_set_validclean(m, 0, nvalid);
|
|
}
|
|
|
|
if (i != ap->a_reqpage) {
|
|
/*
|
|
* Whether or not to leave the page activated is up in
|
|
* the air, but we should put the page on a page queue
|
|
* somewhere (it already is in the object). Result:
|
|
* It appears that emperical results show that
|
|
* deactivating pages is best.
|
|
*/
|
|
|
|
/*
|
|
* Just in case someone was asking for this page we
|
|
* now tell them that it is ok to use.
|
|
*/
|
|
if (!error) {
|
|
if (m->flags & PG_WANTED)
|
|
vm_page_activate(m);
|
|
else
|
|
vm_page_deactivate(m);
|
|
vm_page_wakeup(m);
|
|
} else {
|
|
vnode_pager_freepage(m);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
#endif /* SMBFS_RWGENERIC */
|
|
}
|
|
#endif
|
|
|
|
#ifndef NetBSD
|
|
/*
|
|
* Vnode op for VM putpages.
|
|
* possible bug: all IO done in sync mode
|
|
* Note that vop_close always invalidate pages before close, so it's
|
|
* not necessary to open vnode.
|
|
*/
|
|
int
|
|
smbfs_putpages(ap)
|
|
struct vop_putpages_args /* {
|
|
struct vnode *a_vp;
|
|
vm_page_t *a_m;
|
|
int a_count;
|
|
int a_sync;
|
|
int *a_rtvals;
|
|
vm_ooffset_t a_offset;
|
|
} */ *ap;
|
|
{
|
|
int error;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct proc *p;
|
|
struct ucred *cred;
|
|
|
|
#ifdef SMBFS_RWGENERIC
|
|
p = curproc; /* XXX */
|
|
cred = p->p_ucred; /* XXX */
|
|
VOP_OPEN(vp, FWRITE, cred, p);
|
|
error = vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
|
|
ap->a_sync, ap->a_rtvals);
|
|
VOP_CLOSE(vp, FWRITE, cred, p);
|
|
return error;
|
|
#else
|
|
struct uio uio;
|
|
struct iovec iov;
|
|
vm_offset_t kva;
|
|
struct buf *bp;
|
|
int i, npages, count;
|
|
int *rtvals;
|
|
struct smbmount *smp;
|
|
struct smbnode *np;
|
|
struct smb_cred scred;
|
|
vm_page_t *pages;
|
|
|
|
p = curproc; /* XXX */
|
|
cred = p->p_ucred; /* XXX */
|
|
/* VOP_OPEN(vp, FWRITE, cred, p);*/
|
|
np = VTOSMB(vp);
|
|
smp = VFSTOSMBFS(vp->v_mount);
|
|
pages = ap->a_m;
|
|
count = ap->a_count;
|
|
rtvals = ap->a_rtvals;
|
|
npages = btoc(count);
|
|
|
|
for (i = 0; i < npages; i++) {
|
|
rtvals[i] = VM_PAGER_AGAIN;
|
|
}
|
|
|
|
#if __FreeBSD_version >= 400000
|
|
bp = getpbuf(&smbfs_pbuf_freecnt);
|
|
#else
|
|
bp = getpbuf();
|
|
#endif
|
|
kva = (vm_offset_t) bp->b_data;
|
|
pmap_qenter(kva, pages, npages);
|
|
|
|
iov.iov_base = (caddr_t) kva;
|
|
iov.iov_len = count;
|
|
uio.uio_iov = &iov;
|
|
uio.uio_iovcnt = 1;
|
|
uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
|
|
uio.uio_resid = count;
|
|
uio.uio_segflg = UIO_SYSSPACE;
|
|
uio.uio_rw = UIO_WRITE;
|
|
uio.uio_procp = p;
|
|
SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid);
|
|
|
|
smb_makescred(&scred, p, cred);
|
|
error = smb_write(smp->sm_share, np->n_fid, &uio, &scred);
|
|
/* VOP_CLOSE(vp, FWRITE, cred, p);*/
|
|
SMBVDEBUG("paged write done: %d\n", error);
|
|
|
|
pmap_qremove(kva, npages);
|
|
#if __FreeBSD_version >= 400000
|
|
relpbuf(bp, &smbfs_pbuf_freecnt);
|
|
#else
|
|
relpbuf(bp);
|
|
#endif
|
|
|
|
if (!error) {
|
|
int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE;
|
|
for (i = 0; i < nwritten; i++) {
|
|
rtvals[i] = VM_PAGER_OK;
|
|
pages[i]->dirty = 0;
|
|
}
|
|
}
|
|
return rtvals[0];
|
|
#endif /* SMBFS_RWGENERIC */
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Flush and invalidate all dirty buffers. If another process is already
|
|
* doing the flush, just wait for completion.
|
|
*/
|
|
int
|
|
smbfs_vinvalbuf(vp, flags, cred, p, intrflg)
|
|
struct vnode *vp;
|
|
int flags;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
int intrflg;
|
|
{
|
|
register struct smbnode *np = VTOSMB(vp);
|
|
int error = 0, slpflag, slptimeo;
|
|
|
|
if (vp->v_flag & VXLOCK)
|
|
return 0;
|
|
if (intrflg) {
|
|
slpflag = PCATCH;
|
|
slptimeo = 2 * hz;
|
|
} else {
|
|
slpflag = 0;
|
|
slptimeo = 0;
|
|
}
|
|
while (np->n_flag & NFLUSHINPROG) {
|
|
np->n_flag |= NFLUSHWANT;
|
|
error = tsleep((caddr_t)&np->n_flag, PRIBIO + 2, "smfsvinv", slptimeo);
|
|
error = smb_proc_intr(p);
|
|
if (error == EINTR && intrflg)
|
|
return EINTR;
|
|
}
|
|
np->n_flag |= NFLUSHINPROG;
|
|
error = vinvalbuf(vp, flags, cred, p, slpflag, 0);
|
|
while (error) {
|
|
if (intrflg && (error == ERESTART || error == EINTR)) {
|
|
np->n_flag &= ~NFLUSHINPROG;
|
|
if (np->n_flag & NFLUSHWANT) {
|
|
np->n_flag &= ~NFLUSHWANT;
|
|
wakeup((caddr_t)&np->n_flag);
|
|
}
|
|
return EINTR;
|
|
}
|
|
error = vinvalbuf(vp, flags, cred, p, slpflag, 0);
|
|
}
|
|
np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
|
|
if (np->n_flag & NFLUSHWANT) {
|
|
np->n_flag &= ~NFLUSHWANT;
|
|
wakeup((caddr_t)&np->n_flag);
|
|
}
|
|
return (error);
|
|
}
|