416 lines
11 KiB
C
416 lines
11 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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*
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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 <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 <sys/sx.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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static int smbfs_debuglevel = 0;
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static int smbfs_version = SMBFS_VERSION;
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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 vfs_init_t smbfs_init;
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static vfs_uninit_t smbfs_uninit;
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static vfs_cmount_t smbfs_cmount;
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static vfs_mount_t smbfs_mount;
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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_cmount = smbfs_cmount,
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.vfs_mount = smbfs_mount,
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.vfs_quotactl = smbfs_quotactl,
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.vfs_root = smbfs_root,
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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_cmount(struct mntarg *ma, void * data, uint64_t flags)
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{
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struct smbfs_args args;
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int error;
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error = copyin(data, &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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ma = mount_argf(ma, "dev", "%d", args.dev);
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ma = mount_argb(ma, args.flags & SMBFS_MOUNT_SOFT, "nosoft");
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ma = mount_argb(ma, args.flags & SMBFS_MOUNT_INTR, "nointr");
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ma = mount_argb(ma, args.flags & SMBFS_MOUNT_STRONG, "nostrong");
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ma = mount_argb(ma, args.flags & SMBFS_MOUNT_HAVE_NLS, "nohave_nls");
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ma = mount_argb(ma, !(args.flags & SMBFS_MOUNT_NO_LONG), "nolong");
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ma = mount_arg(ma, "rootpath", args.root_path, -1);
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ma = mount_argf(ma, "uid", "%d", args.uid);
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ma = mount_argf(ma, "gid", "%d", args.gid);
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ma = mount_argf(ma, "file_mode", "%d", args.file_mode);
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ma = mount_argf(ma, "dir_mode", "%d", args.dir_mode);
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ma = mount_argf(ma, "caseopt", "%d", args.caseopt);
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error = kernel_mount(ma, flags);
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return (error);
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}
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static const char *smbfs_opts[] = {
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"fd", "soft", "intr", "strong", "have_nls", "long",
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"mountpoint", "rootpath", "uid", "gid", "file_mode", "dir_mode",
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"caseopt", "errmsg", NULL
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};
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static int
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smbfs_mount(struct mount *mp)
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{
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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 thread *td;
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struct smb_dev *dev;
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struct smb_cred *scred;
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int error, v;
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char *pc, *pe;
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dev = NULL;
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td = curthread;
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if (mp->mnt_flag & (MNT_UPDATE | MNT_ROOTFS))
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return EOPNOTSUPP;
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if (vfs_filteropt(mp->mnt_optnew, smbfs_opts)) {
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vfs_mount_error(mp, "%s", "Invalid option");
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return (EINVAL);
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}
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scred = smbfs_malloc_scred();
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smb_makescred(scred, td, td->td_ucred);
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/* Ask userspace of `fd`, the file descriptor of this session */
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if (1 != vfs_scanopt(mp->mnt_optnew, "fd", "%d", &v)) {
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vfs_mount_error(mp, "No fd option");
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smbfs_free_scred(scred);
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return (EINVAL);
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}
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error = smb_dev2share(v, SMBM_EXEC, scred, &ssp, &dev);
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smp = malloc(sizeof(*smp), M_SMBFSDATA, M_WAITOK | M_ZERO);
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if (error) {
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printf("invalid device handle %d (%d)\n", v, error);
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vfs_mount_error(mp, "invalid device handle %d %d\n", v, error);
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smbfs_free_scred(scred);
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free(smp, M_SMBFSDATA);
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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);
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mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax;
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mp->mnt_data = smp;
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smp->sm_share = ssp;
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smp->sm_root = NULL;
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smp->sm_dev = dev;
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if (1 != vfs_scanopt(mp->mnt_optnew,
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"caseopt", "%d", &smp->sm_caseopt)) {
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vfs_mount_error(mp, "Invalid caseopt");
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error = EINVAL;
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goto bad;
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}
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if (1 != vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) {
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vfs_mount_error(mp, "Invalid uid");
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error = EINVAL;
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goto bad;
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}
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smp->sm_uid = v;
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if (1 != vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) {
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vfs_mount_error(mp, "Invalid gid");
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error = EINVAL;
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goto bad;
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}
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smp->sm_gid = v;
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if (1 != vfs_scanopt(mp->mnt_optnew, "file_mode", "%d", &v)) {
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vfs_mount_error(mp, "Invalid file_mode");
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error = EINVAL;
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goto bad;
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}
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smp->sm_file_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
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if (1 != vfs_scanopt(mp->mnt_optnew, "dir_mode", "%d", &v)) {
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vfs_mount_error(mp, "Invalid dir_mode");
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error = EINVAL;
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goto bad;
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}
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smp->sm_dir_mode = (v & (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
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vfs_flagopt(mp->mnt_optnew,
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"nolong", &smp->sm_flags, SMBFS_MOUNT_NO_LONG);
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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 = strchr(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 = strchr(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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vfs_getnewfsid(mp);
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error = smbfs_root(mp, LK_EXCLUSIVE, &vp);
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if (error) {
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vfs_mount_error(mp, "smbfs_root error: %d", error);
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goto bad;
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}
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VOP_UNLOCK(vp, 0);
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SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp));
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#ifdef DIAGNOSTIC
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SMBERROR("mp=%p\n", mp);
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#endif
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smbfs_free_scred(scred);
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return error;
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bad:
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if (ssp)
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smb_share_put(ssp, scred);
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smbfs_free_scred(scred);
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SMB_LOCK();
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if (error && smp->sm_dev == dev) {
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smp->sm_dev = NULL;
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sdp_trydestroy(dev);
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}
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SMB_UNLOCK();
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free(smp, M_SMBFSDATA);
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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)
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{
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struct thread *td;
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struct smbmount *smp = VFSTOSMBFS(mp);
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struct smb_cred *scred;
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struct smb_dev *dev;
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int error, flags;
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SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags);
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td = curthread;
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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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scred = smbfs_malloc_scred();
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smb_makescred(scred, td, td->td_ucred);
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error = smb_share_lock(smp->sm_share);
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if (error)
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goto out;
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smb_share_put(smp->sm_share, scred);
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SMB_LOCK();
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dev = smp->sm_dev;
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if (!dev)
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panic("No private data for mount point");
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sdp_trydestroy(dev);
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mp->mnt_data = NULL;
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SMB_UNLOCK();
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free(smp, M_SMBFSDATA);
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MNT_ILOCK(mp);
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mp->mnt_flag &= ~MNT_LOCAL;
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MNT_IUNLOCK(mp);
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out:
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smbfs_free_scred(scred);
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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, int flags, struct vnode **vpp)
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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 thread *td;
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struct ucred *cred;
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struct smb_cred *scred;
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int error;
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td = curthread;
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cred = td->td_ucred;
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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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scred = smbfs_malloc_scred();
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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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goto out;
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error = smbfs_nget(mp, NULL, NULL, 0, &fattr, &vp);
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if (error)
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goto out;
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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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out:
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smbfs_free_scred(scred);
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return error;
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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)
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struct mount *mp;
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int cmd;
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uid_t uid;
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void *arg;
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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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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)
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{
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struct thread *td = curthread;
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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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vfs_mount_error(mp, "np == NULL");
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return EINVAL;
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}
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sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */
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scred = smbfs_malloc_scred();
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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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smbfs_free_scred(scred);
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return error;
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}
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sbp->f_flags = 0; /* copy of mount exported flags */
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smbfs_free_scred(scred);
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return 0;
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}
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