diff options
Diffstat (limited to 'sys/cddl/compat/opensolaris/kern/opensolaris_vfs.c')
| -rw-r--r-- | sys/cddl/compat/opensolaris/kern/opensolaris_vfs.c | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/sys/cddl/compat/opensolaris/kern/opensolaris_vfs.c b/sys/cddl/compat/opensolaris/kern/opensolaris_vfs.c deleted file mode 100644 index 0ba0338a9848..000000000000 --- a/sys/cddl/compat/opensolaris/kern/opensolaris_vfs.c +++ /dev/null @@ -1,252 +0,0 @@ -/*- - * Copyright (c) 2006-2007 Pawel Jakub Dawidek <pjd@FreeBSD.org> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/kernel.h> -#include <sys/systm.h> -#include <sys/malloc.h> -#include <sys/mount.h> -#include <sys/cred.h> -#include <sys/vfs.h> -#include <sys/priv.h> -#include <sys/libkern.h> - -MALLOC_DECLARE(M_MOUNT); - -void -vfs_setmntopt(vfs_t *vfsp, const char *name, const char *arg, - int flags __unused) -{ - struct vfsopt *opt; - size_t namesize; - int locked; - - if (!(locked = mtx_owned(MNT_MTX(vfsp)))) - MNT_ILOCK(vfsp); - - if (vfsp->mnt_opt == NULL) { - void *opts; - - MNT_IUNLOCK(vfsp); - opts = malloc(sizeof(*vfsp->mnt_opt), M_MOUNT, M_WAITOK); - MNT_ILOCK(vfsp); - if (vfsp->mnt_opt == NULL) { - vfsp->mnt_opt = opts; - TAILQ_INIT(vfsp->mnt_opt); - } else { - free(opts, M_MOUNT); - } - } - - MNT_IUNLOCK(vfsp); - - opt = malloc(sizeof(*opt), M_MOUNT, M_WAITOK); - namesize = strlen(name) + 1; - opt->name = malloc(namesize, M_MOUNT, M_WAITOK); - strlcpy(opt->name, name, namesize); - opt->pos = -1; - opt->seen = 1; - if (arg == NULL) { - opt->value = NULL; - opt->len = 0; - } else { - opt->len = strlen(arg) + 1; - opt->value = malloc(opt->len, M_MOUNT, M_WAITOK); - bcopy(arg, opt->value, opt->len); - } - - MNT_ILOCK(vfsp); - TAILQ_INSERT_TAIL(vfsp->mnt_opt, opt, link); - if (!locked) - MNT_IUNLOCK(vfsp); -} - -void -vfs_clearmntopt(vfs_t *vfsp, const char *name) -{ - int locked; - - if (!(locked = mtx_owned(MNT_MTX(vfsp)))) - MNT_ILOCK(vfsp); - vfs_deleteopt(vfsp->mnt_opt, name); - if (!locked) - MNT_IUNLOCK(vfsp); -} - -int -vfs_optionisset(const vfs_t *vfsp, const char *opt, char **argp) -{ - struct vfsoptlist *opts = vfsp->mnt_optnew; - int error; - - if (opts == NULL) - return (0); - error = vfs_getopt(opts, opt, (void **)argp, NULL); - return (error != 0 ? 0 : 1); -} - -int -mount_snapshot(kthread_t *td, vnode_t **vpp, const char *fstype, char *fspath, - char *fspec, int fsflags) -{ - struct vfsconf *vfsp; - struct mount *mp; - vnode_t *vp, *mvp; - struct ucred *cr; - int error; - - ASSERT_VOP_ELOCKED(*vpp, "mount_snapshot"); - - vp = *vpp; - *vpp = NULL; - error = 0; - - /* - * Be ultra-paranoid about making sure the type and fspath - * variables will fit in our mp buffers, including the - * terminating NUL. - */ - if (strlen(fstype) >= MFSNAMELEN || strlen(fspath) >= MNAMELEN) - error = ENAMETOOLONG; - if (error == 0 && (vfsp = vfs_byname_kld(fstype, td, &error)) == NULL) - error = ENODEV; - if (error == 0 && vp->v_type != VDIR) - error = ENOTDIR; - /* - * We need vnode lock to protect v_mountedhere and vnode interlock - * to protect v_iflag. - */ - if (error == 0) { - VI_LOCK(vp); - if ((vp->v_iflag & VI_MOUNT) == 0 && vp->v_mountedhere == NULL) - vp->v_iflag |= VI_MOUNT; - else - error = EBUSY; - VI_UNLOCK(vp); - } - if (error != 0) { - vput(vp); - return (error); - } - vn_seqc_write_begin(vp); - VOP_UNLOCK(vp); - - /* - * Allocate and initialize the filesystem. - * We don't want regular user that triggered snapshot mount to be able - * to unmount it, so pass credentials of the parent mount. - */ - mp = vfs_mount_alloc(vp, vfsp, fspath, vp->v_mount->mnt_cred); - - mp->mnt_optnew = NULL; - vfs_setmntopt(mp, "from", fspec, 0); - mp->mnt_optnew = mp->mnt_opt; - mp->mnt_opt = NULL; - - /* - * Set the mount level flags. - */ - mp->mnt_flag = fsflags & MNT_UPDATEMASK; - /* - * Snapshots are always read-only. - */ - mp->mnt_flag |= MNT_RDONLY; - /* - * We don't want snapshots to allow access to vulnerable setuid - * programs, so we turn off setuid when mounting snapshots. - */ - mp->mnt_flag |= MNT_NOSUID; - /* - * We don't want snapshots to be visible in regular - * mount(8) and df(1) output. - */ - mp->mnt_flag |= MNT_IGNORE; - /* - * XXX: This is evil, but we can't mount a snapshot as a regular user. - * XXX: Is is safe when snapshot is mounted from within a jail? - */ - cr = td->td_ucred; - td->td_ucred = kcred; - error = VFS_MOUNT(mp); - td->td_ucred = cr; - - if (error != 0) { - /* - * Clear VI_MOUNT and decrement the use count "atomically", - * under the vnode lock. This is not strictly required, - * but makes it easier to reason about the life-cycle and - * ownership of the covered vnode. - */ - vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); - VI_LOCK(vp); - vp->v_iflag &= ~VI_MOUNT; - VI_UNLOCK(vp); - vn_seqc_write_end(vp); - vput(vp); - vfs_unbusy(mp); - vfs_freeopts(mp->mnt_optnew); - mp->mnt_vnodecovered = NULL; - vfs_mount_destroy(mp); - return (error); - } - - if (mp->mnt_opt != NULL) - vfs_freeopts(mp->mnt_opt); - mp->mnt_opt = mp->mnt_optnew; - (void)VFS_STATFS(mp, &mp->mnt_stat); - - /* - * Prevent external consumers of mount options from reading - * mnt_optnew. - */ - mp->mnt_optnew = NULL; - - vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); -#ifdef FREEBSD_NAMECACHE - cache_purge(vp); -#endif - VI_LOCK(vp); - vp->v_iflag &= ~VI_MOUNT; - VI_UNLOCK(vp); - - vp->v_mountedhere = mp; - /* Put the new filesystem on the mount list. */ - mtx_lock(&mountlist_mtx); - TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list); - mtx_unlock(&mountlist_mtx); - vfs_event_signal(NULL, VQ_MOUNT, 0); - if (VFS_ROOT(mp, LK_EXCLUSIVE, &mvp)) - panic("mount: lost mount"); - vn_seqc_write_end(vp); - VOP_UNLOCK(vp); - vfs_op_exit(mp); - vfs_unbusy(mp); - *vpp = mvp; - return (0); -} |