5e8c582ac2
and refuse initializing filesystems with a wrong version. This will aid maintenance activites on the 5-stable branch. s/vfs_mount/vfs_omount/ s/vfs_nmount/vfs_mount/ Name our filesystems mount function consistently. Eliminate the namiedata argument to both vfs_mount and vfs_omount. It was originally there to save stack space. A few places abused it to get hold of some credentials to pass around. Effectively it is unused. Reorganize the root filesystem selection code.
383 lines
10 KiB
C
383 lines
10 KiB
C
/*
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* Copyright (c) 2000-2001, 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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* $FreeBSD$
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*/
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#include "opt_netsmb.h"
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#ifndef NETSMB
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#error "SMBFS requires option NETSMB"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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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_dev.h>
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#include <fs/smbfs/smbfs.h>
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#include <fs/smbfs/smbfs_node.h>
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#include <fs/smbfs/smbfs_subr.h>
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int smbfs_debuglevel = 0;
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static int smbfs_version = SMBFS_VERSION;
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#ifdef SMBFS_USEZONE
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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vm_zone_t smbfsmount_zone;
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#endif
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SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS filesystem");
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SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, "");
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SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, "");
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static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table");
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static vfs_init_t smbfs_init;
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static vfs_uninit_t smbfs_uninit;
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static vfs_omount_t smbfs_omount;
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static vfs_start_t smbfs_start;
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static vfs_root_t smbfs_root;
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static vfs_quotactl_t smbfs_quotactl;
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static vfs_statfs_t smbfs_statfs;
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static vfs_unmount_t smbfs_unmount;
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static struct vfsops smbfs_vfsops = {
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.vfs_init = smbfs_init,
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.vfs_omount = smbfs_omount,
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.vfs_quotactl = smbfs_quotactl,
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.vfs_root = smbfs_root,
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.vfs_start = smbfs_start,
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.vfs_statfs = smbfs_statfs,
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.vfs_sync = vfs_stdsync,
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.vfs_uninit = smbfs_uninit,
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.vfs_unmount = smbfs_unmount,
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};
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VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK);
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MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION);
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MODULE_DEPEND(smbfs, libiconv, 1, 1, 2);
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MODULE_DEPEND(smbfs, libmchain, 1, 1, 1);
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int smbfs_pbuf_freecnt = -1; /* start out unlimited */
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static int
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smbfs_omount(struct mount *mp, char *path, caddr_t data, struct thread *td)
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{
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struct smbfs_args args; /* will hold data from mount request */
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struct smbmount *smp = NULL;
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struct smb_vc *vcp;
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struct smb_share *ssp = NULL;
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struct vnode *vp;
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struct smb_cred scred;
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int error;
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char *pc, *pe;
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if (data == NULL) {
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printf("missing data argument\n");
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return EINVAL;
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}
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if (mp->mnt_flag & MNT_UPDATE) {
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printf("MNT_UPDATE not implemented");
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return EOPNOTSUPP;
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}
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error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args));
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if (error)
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return error;
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if (args.version != SMBFS_VERSION) {
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printf("mount version mismatch: kernel=%d, mount=%d\n",
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SMBFS_VERSION, args.version);
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return EINVAL;
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}
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smb_makescred(&scred, td, td->td_ucred);
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error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp);
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if (error) {
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printf("invalid device handle %d (%d)\n", args.dev, error);
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return error;
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}
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vcp = SSTOVC(ssp);
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smb_share_unlock(ssp, 0, td);
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mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax;
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#ifdef SMBFS_USEZONE
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smp = zalloc(smbfsmount_zone);
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#else
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MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA,
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M_WAITOK|M_USE_RESERVE);
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#endif
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if (smp == NULL) {
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printf("could not alloc smbmount\n");
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error = ENOMEM;
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goto bad;
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}
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bzero(smp, sizeof(*smp));
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mp->mnt_data = (qaddr_t)smp;
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smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen);
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if (smp->sm_hash == NULL)
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goto bad;
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lockinit(&smp->sm_hashlock, PVFS, "smbfsh", 0, 0);
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smp->sm_share = ssp;
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smp->sm_root = NULL;
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smp->sm_args = args;
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smp->sm_caseopt = args.caseopt;
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smp->sm_args.file_mode = (smp->sm_args.file_mode &
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(S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
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smp->sm_args.dir_mode = (smp->sm_args.dir_mode &
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(S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
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/* simple_lock_init(&smp->sm_npslock);*/
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pc = mp->mnt_stat.f_mntfromname;
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pe = pc + sizeof(mp->mnt_stat.f_mntfromname);
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bzero(pc, MNAMELEN);
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*pc++ = '/';
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*pc++ = '/';
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pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0);
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if (pc < pe-1) {
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*(pc++) = '@';
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pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0);
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if (pc < pe - 1) {
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*(pc++) = '/';
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strncpy(pc, ssp->ss_name, pe - pc - 2);
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}
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}
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/* protect against invalid mount points */
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smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0';
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vfs_getnewfsid(mp);
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error = smbfs_root(mp, &vp, td);
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if (error)
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goto bad;
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VOP_UNLOCK(vp, 0, td);
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SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp));
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#ifdef DIAGNOSTICS
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SMBERROR("mp=%p\n", mp);
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#endif
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return error;
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bad:
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if (smp) {
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if (smp->sm_hash)
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free(smp->sm_hash, M_SMBFSHASH);
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lockdestroy(&smp->sm_hashlock);
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#ifdef SMBFS_USEZONE
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zfree(smbfsmount_zone, smp);
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#else
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free(smp, M_SMBFSDATA);
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#endif
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}
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if (ssp)
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smb_share_put(ssp, &scred);
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return error;
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}
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/* Unmount the filesystem described by mp. */
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static int
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smbfs_unmount(struct mount *mp, int mntflags, struct thread *td)
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{
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struct smbmount *smp = VFSTOSMBFS(mp);
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struct smb_cred scred;
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int error, flags;
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SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags);
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flags = 0;
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if (mntflags & MNT_FORCE)
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flags |= FORCECLOSE;
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/*
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* Keep trying to flush the vnode list for the mount while
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* some are still busy and we are making progress towards
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* making them not busy. This is needed because smbfs vnodes
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* reference their parent directory but may appear after their
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* parent in the list; one pass over the vnode list is not
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* sufficient in this case.
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*/
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do {
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smp->sm_didrele = 0;
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/* There is 1 extra root vnode reference from smbfs_mount(). */
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error = vflush(mp, 1, flags, td);
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} while (error == EBUSY && smp->sm_didrele != 0);
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if (error)
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return error;
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smb_makescred(&scred, td, td->td_ucred);
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smb_share_put(smp->sm_share, &scred);
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mp->mnt_data = (qaddr_t)0;
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if (smp->sm_hash)
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free(smp->sm_hash, M_SMBFSHASH);
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lockdestroy(&smp->sm_hashlock);
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#ifdef SMBFS_USEZONE
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zfree(smbfsmount_zone, smp);
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#else
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free(smp, M_SMBFSDATA);
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#endif
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mp->mnt_flag &= ~MNT_LOCAL;
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return error;
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}
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/*
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* Return locked root vnode of a filesystem
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*/
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static int
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smbfs_root(struct mount *mp, struct vnode **vpp, struct thread *td)
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{
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struct smbmount *smp = VFSTOSMBFS(mp);
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struct vnode *vp;
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struct smbnode *np;
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struct smbfattr fattr;
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struct ucred *cred = td->td_ucred;
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struct smb_cred scred;
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int error;
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if (smp == NULL) {
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SMBERROR("smp == NULL (bug in umount)\n");
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return EINVAL;
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}
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if (smp->sm_root) {
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*vpp = SMBTOV(smp->sm_root);
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return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td);
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}
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smb_makescred(&scred, td, cred);
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error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred);
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if (error)
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return error;
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error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp);
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if (error)
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return error;
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ASSERT_VOP_LOCKED(vp, "smbfs_root");
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vp->v_vflag |= VV_ROOT;
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np = VTOSMB(vp);
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smp->sm_root = np;
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*vpp = vp;
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return 0;
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}
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/*
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* Vfs start routine, a no-op.
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*/
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/* ARGSUSED */
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static int
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smbfs_start(mp, flags, td)
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struct mount *mp;
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int flags;
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struct thread *td;
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{
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SMBVDEBUG("flags=%04x\n", flags);
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return 0;
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}
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/*
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* Do operations associated with quotas, not supported
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*/
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/* ARGSUSED */
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static int
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smbfs_quotactl(mp, cmd, uid, arg, td)
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struct mount *mp;
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int cmd;
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uid_t uid;
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caddr_t arg;
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struct thread *td;
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{
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SMBVDEBUG("return EOPNOTSUPP\n");
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return EOPNOTSUPP;
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}
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/*ARGSUSED*/
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int
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smbfs_init(struct vfsconf *vfsp)
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{
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#ifdef SMBFS_USEZONE
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smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1);
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#endif
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smbfs_pbuf_freecnt = nswbuf / 2 + 1;
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SMBVDEBUG("done.\n");
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return 0;
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}
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/*ARGSUSED*/
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int
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smbfs_uninit(struct vfsconf *vfsp)
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{
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SMBVDEBUG("done.\n");
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return 0;
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}
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/*
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* smbfs_statfs call
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*/
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int
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smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
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{
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struct smbmount *smp = VFSTOSMBFS(mp);
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struct smbnode *np = smp->sm_root;
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struct smb_share *ssp = smp->sm_share;
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struct smb_cred scred;
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int error = 0;
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if (np == NULL)
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return EINVAL;
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sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */
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smb_makescred(&scred, td, td->td_ucred);
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if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0)
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error = smbfs_smb_statfs2(ssp, sbp, &scred);
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else
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error = smbfs_smb_statfs(ssp, sbp, &scred);
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if (error)
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return error;
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sbp->f_flags = 0; /* copy of mount exported flags */
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if (sbp != &mp->mnt_stat) {
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sbp->f_fsid = mp->mnt_stat.f_fsid; /* filesystem id */
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sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */
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sbp->f_type = mp->mnt_vfc->vfc_typenum; /* type of filesystem */
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bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
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bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
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}
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strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN);
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return 0;
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}
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