473 lines
12 KiB
C
473 lines
12 KiB
C
/* $NetBSD: smbfs_vfsops.c,v 1.71 2007/09/21 01:33:04 rmind Exp $ */
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/*
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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: src/sys/fs/smbfs/smbfs_vfsops.c,v 1.5 2001/12/13 13:08:34 sheldonh Exp
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: smbfs_vfsops.c,v 1.71 2007/09/21 01:33:04 rmind Exp $");
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#ifdef _KERNEL_OPT
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#include "opt_quota.h"
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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/buf.h>
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#include <sys/kernel.h>
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#include <sys/dirent.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/kauth.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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#ifndef __NetBSD__
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SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS file system");
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SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, "");
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#else
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SYSCTL_SETUP(sysctl_vfs_samba_setup, "sysctl vfs.samba subtree setup")
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{
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const struct sysctlnode *smb = NULL;
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_NODE, "vfs", NULL,
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NULL, 0, NULL, 0,
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CTL_VFS, CTL_EOL);
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sysctl_createv(clog, 0, NULL, &smb,
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CTLFLAG_PERMANENT,
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CTLTYPE_NODE, "samba",
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SYSCTL_DESCR("SMB/CIFS remote file system"),
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NULL, 0, NULL, 0,
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CTL_VFS, CTL_CREATE, CTL_EOL);
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if (smb != NULL)
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sysctl_createv(clog, 0, &smb, NULL,
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CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE,
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CTLTYPE_INT, "version",
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SYSCTL_DESCR("smbfs version"),
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NULL, SMBFS_VERSION, NULL, 0,
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CTL_CREATE, CTL_EOL);
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}
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#endif
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static MALLOC_JUSTDEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table");
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VFS_PROTOS(smbfs);
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static int smbfs_setroot(struct mount *);
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struct pool smbfs_node_pool;
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extern struct vnodeopv_desc smbfs_vnodeop_opv_desc;
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static const struct vnodeopv_desc *smbfs_vnodeopv_descs[] = {
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&smbfs_vnodeop_opv_desc,
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NULL,
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};
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struct vfsops smbfs_vfsops = {
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MOUNT_SMBFS,
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sizeof (struct smbfs_args),
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smbfs_mount,
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smbfs_start,
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smbfs_unmount,
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smbfs_root,
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smbfs_quotactl,
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smbfs_statvfs,
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smbfs_sync,
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smbfs_vget,
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(void *)eopnotsupp, /* vfs_fhtovp */
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(void *)eopnotsupp, /* vfs_vptofh */
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smbfs_init,
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smbfs_reinit,
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smbfs_done,
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(int (*) (void)) eopnotsupp, /* mountroot */
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(int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp,
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vfs_stdextattrctl,
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(void *)eopnotsupp, /* vfs_suspendctl */
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smbfs_vnodeopv_descs,
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0, /* vfs_refcount */
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{ NULL, NULL },
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};
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VFS_ATTACH(smbfs_vfsops);
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int
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smbfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len,
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struct lwp *l)
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{
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struct smbfs_args *args = data; /* holds 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 smb_cred scred;
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struct proc *p;
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int error;
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if (*data_len < sizeof *args)
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return EINVAL;
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p = l->l_proc;
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if (mp->mnt_flag & MNT_GETARGS) {
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smp = VFSTOSMBFS(mp);
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if (smp == NULL)
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return EIO;
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*args = smp->sm_args;
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*data_len = sizeof *args;
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return 0;
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}
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if (mp->mnt_flag & MNT_UPDATE)
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return EOPNOTSUPP;
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if (args->version != SMBFS_VERSION) {
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SMBVDEBUG("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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error = set_statvfs_info(path, UIO_USERSPACE, NULL, UIO_USERSPACE,
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mp->mnt_op->vfs_name, mp, l);
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if (error)
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return error;
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smb_makescred(&scred, l, l->l_cred);
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error = smb_dev2share(args->dev_fd, SMBM_EXEC, &scred, &ssp);
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if (error)
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return error;
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smb_share_unlock(ssp, 0); /* keep ref, but unlock */
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vcp = SSTOVC(ssp);
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mp->mnt_stat.f_iosize = vcp->vc_txmax;
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mp->mnt_stat.f_namemax =
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(vcp->vc_hflags2 & SMB_FLAGS2_KNOWS_LONG_NAMES) ? 255 : 12;
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MALLOC(smp, struct smbmount *, sizeof(*smp), M_SMBFSDATA, M_WAITOK);
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memset(smp, 0, sizeof(*smp));
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mp->mnt_data = smp;
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smp->sm_hash = hashinit(desiredvnodes, HASH_LIST,
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M_SMBFSHASH, M_WAITOK, &smp->sm_hashlen);
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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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memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN);
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snprintf(mp->mnt_stat.f_mntfromname, MNAMELEN,
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"//%s@%s/%s", vcp->vc_username, vcp->vc_srvname, ssp->ss_name);
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vfs_getnewfsid(mp);
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return (0);
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}
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/* Unmount the filesystem described by mp. */
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int
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smbfs_unmount(struct mount *mp, int mntflags, struct lwp *l)
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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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#ifdef QUOTA
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#endif
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/* Drop the extra reference to root vnode. */
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if (smp->sm_root) {
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vrele(SMBTOV(smp->sm_root));
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smp->sm_root = NULL;
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}
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/* Flush all vnodes.
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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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do {
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smp->sm_didrele = 0;
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error = vflush(mp, NULLVP, flags);
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} while (error == EBUSY && smp->sm_didrele != 0);
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smb_makescred(&scred, l, l->l_cred);
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smb_share_lock(smp->sm_share, 0);
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smb_share_put(smp->sm_share, &scred);
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mp->mnt_data = NULL;
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free(smp->sm_hash, M_SMBFSHASH);
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#ifdef __NetBSD__
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lockmgr(&smp->sm_hashlock, LK_DRAIN, NULL);
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#else
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lockdestroy(&smp->sm_hashlock);
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#endif
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FREE(smp, M_SMBFSDATA);
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return error;
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}
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/*
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* Get root vnode of the smbfs filesystem, and store it in sm_root.
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*/
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static int
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smbfs_setroot(struct mount *mp)
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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 smbfattr fattr;
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struct lwp *l = curlwp;
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kauth_cred_t cred = l->l_cred;
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struct smb_cred scred;
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int error;
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KASSERT(smp->sm_root == NULL);
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smb_makescred(&scred, l, 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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/*
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* Someone might have already set sm_root while we slept
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* in smb_lookup or malloc/getnewvnode.
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*/
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if (smp->sm_root)
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vput(vp);
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else {
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vp->v_flag |= VROOT;
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smp->sm_root = VTOSMB(vp);
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/* Keep reference, but unlock */
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VOP_UNLOCK(vp, 0);
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}
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return (0);
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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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int
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smbfs_root(struct mount *mp, struct vnode **vpp)
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{
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struct smbmount *smp = VFSTOSMBFS(mp);
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if (__predict_false(!smp->sm_root)) {
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int error = smbfs_setroot(mp);
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if (error)
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return (error);
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/* fallthrough */
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}
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KASSERT(smp->sm_root != NULL && SMBTOV(smp->sm_root) != NULL);
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*vpp = SMBTOV(smp->sm_root);
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return vget(*vpp, LK_EXCLUSIVE | LK_RETRY);
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}
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/*
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* Make a filesystem operational.
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* Nothing to do at the moment.
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*/
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/* ARGSUSED */
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int
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smbfs_start(struct mount *mp, int flags,
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struct lwp *l)
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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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int
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smbfs_quotactl(struct mount *mp, int cmd, uid_t uid,
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void *arg, struct lwp *l)
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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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void
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smbfs_init(void)
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{
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malloc_type_attach(M_SMBNODENAME);
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malloc_type_attach(M_SMBFSDATA);
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malloc_type_attach(M_SMBFSHASH);
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pool_init(&smbfs_node_pool, sizeof(struct smbnode), 0, 0, 0,
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"smbfsnopl", &pool_allocator_nointr, IPL_NONE);
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SMBVDEBUG("init.\n");
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}
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void
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smbfs_reinit(void)
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{
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SMBVDEBUG("reinit.\n");
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}
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void
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smbfs_done(void)
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{
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pool_destroy(&smbfs_node_pool);
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pool_destroy(&smbfs_node_pool);
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malloc_type_detach(M_SMBNODENAME);
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malloc_type_detach(M_SMBFSDATA);
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malloc_type_detach(M_SMBFSHASH);
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SMBVDEBUG("done.\n");
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}
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/*
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* smbfs_statvfs call
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*/
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int
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smbfs_statvfs(struct mount *mp, struct statvfs *sbp, struct lwp *l)
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{
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struct smbmount *smp = VFSTOSMBFS(mp);
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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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sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */
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smb_makescred(&scred, l, l->l_cred);
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error = smbfs_smb_statvfs(ssp, sbp, &scred);
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if (error)
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return error;
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sbp->f_flag = 0; /* copy of mount exported flags */
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sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */
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copy_statvfs_info(sbp, mp);
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return 0;
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}
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/*
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* Flush out the buffer cache
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*/
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int
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smbfs_sync(struct mount *mp, int waitfor, kauth_cred_t cred, struct lwp *l)
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{
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struct vnode *vp, *nvp;
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struct smbnode *np;
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int error, allerror = 0;
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/*
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* Force stale buffer cache information to be flushed.
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*/
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simple_lock(&mntvnode_slock);
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loop:
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/*
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* NOTE: not using the TAILQ_FOREACH here since in this loop vgone()
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* and vclean() can be called indirectly
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*/
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for (vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp; vp = nvp) {
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/*
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* If the vnode that we are about to sync is no longer
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* associated with this mount point, start over.
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*/
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if (vp->v_mount != mp)
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goto loop;
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simple_lock(&vp->v_interlock);
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nvp = TAILQ_NEXT(vp, v_mntvnodes);
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np = VTOSMB(vp);
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if (np == NULL) {
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simple_unlock(&vp->v_interlock);
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continue;
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}
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if ((vp->v_type == VNON || (np->n_flag & NMODIFIED) == 0) &&
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LIST_EMPTY(&vp->v_dirtyblkhd) &&
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UVM_OBJ_IS_CLEAN(&vp->v_uobj)) {
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simple_unlock(&vp->v_interlock);
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continue;
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}
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simple_unlock(&mntvnode_slock);
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error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK);
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if (error) {
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simple_lock(&mntvnode_slock);
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if (error == ENOENT)
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goto loop;
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continue;
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}
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error = VOP_FSYNC(vp, cred,
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waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0, l);
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if (error)
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allerror = error;
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vput(vp);
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simple_lock(&mntvnode_slock);
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}
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simple_unlock(&mntvnode_slock);
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return (allerror);
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}
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#if __FreeBSD_version < 400009
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/*
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* smbfs flat namespace lookup. Unsupported.
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*/
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/* ARGSUSED */
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int smbfs_vget(struct mount *mp, ino_t ino,
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struct vnode **vpp)
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{
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return (EOPNOTSUPP);
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}
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#endif /* __FreeBSD_version < 400009 */
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