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![Kyle Evans](/assets/img/avatar_default.png)
- File names don't necessarily need to be repeated - Add SPDX tags - Add a missing copyright for Kyle Kneitinger in bectl.8, originally written by him in GSoC 2017; his standard copyright notice has been copied from other files within the same directory to remain consistent with how he clearly wished to portray it
211 lines
5.3 KiB
C
211 lines
5.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2017 Kyle J. Kneitinger <kyle@kneit.in>
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* Copyright (c) 2018 Kyle Evans <kevans@FreeBSD.org>
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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 REGENTS 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 REGENTS 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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#include "be.h"
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#include "be_impl.h"
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struct be_mountcheck_info {
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const char *path;
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char *name;
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};
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static int
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be_mountcheck_cb(zfs_handle_t *zfs_hdl, void *data)
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{
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struct be_mountcheck_info *info;
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char *mountpoint;
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if (data == NULL)
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return (1);
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info = (struct be_mountcheck_info *)data;
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if (!zfs_is_mounted(zfs_hdl, &mountpoint))
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return (0);
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if (strcmp(mountpoint, info->path) == 0) {
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info->name = strdup(zfs_get_name(zfs_hdl));
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return (1);
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}
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return (0);
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}
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/*
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* usage
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*/
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int
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be_mounted_at(libbe_handle_t *lbh, const char *path, nvlist_t *details)
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{
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char be[BE_MAXPATHLEN + 1];
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zfs_handle_t *root_hdl;
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struct be_mountcheck_info info;
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prop_data_t propinfo;
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bzero(&be, BE_MAXPATHLEN + 1);
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if ((root_hdl = zfs_open(lbh->lzh, lbh->root,
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ZFS_TYPE_FILESYSTEM)) == NULL)
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return (BE_ERR_ZFSOPEN);
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info.path = path;
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info.name = NULL;
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zfs_iter_filesystems(root_hdl, be_mountcheck_cb, &info);
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zfs_close(root_hdl);
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if (info.name != NULL) {
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if (details != NULL) {
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if ((root_hdl = zfs_open(lbh->lzh, lbh->root,
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ZFS_TYPE_FILESYSTEM)) == NULL) {
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free(info.name);
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return (BE_ERR_ZFSOPEN);
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}
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propinfo.lbh = lbh;
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propinfo.list = details;
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propinfo.single_object = false;
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prop_list_builder_cb(root_hdl, &propinfo);
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zfs_close(root_hdl);
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}
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free(info.name);
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return (0);
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}
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return (1);
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}
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/*
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* usage
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*/
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int
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be_mount(libbe_handle_t *lbh, char *bootenv, char *mountpoint, int flags,
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char *result_loc)
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{
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char be[BE_MAXPATHLEN];
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char mnt_temp[BE_MAXPATHLEN];
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char *path;
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int mntflags;
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int err;
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if ((err = be_root_concat(lbh, bootenv, be)) != 0)
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return (set_error(lbh, err));
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if (!be_exists(lbh, bootenv))
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return (set_error(lbh, BE_ERR_NOENT));
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if (is_mounted(lbh->lzh, be, &path))
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return (set_error(lbh, BE_ERR_MOUNTED));
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mntflags = (flags & BE_MNT_FORCE) ? MNT_FORCE : 0;
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/* Create mountpoint if it is not specified */
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if (mountpoint == NULL) {
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strcpy(mnt_temp, "/tmp/be_mount.XXXX");
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if (mkdtemp(mnt_temp) == NULL)
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return (set_error(lbh, BE_ERR_IO));
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}
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char opt = '\0';
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if ((err = zmount(be, (mountpoint == NULL) ? mnt_temp : mountpoint,
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mntflags, __DECONST(char *, MNTTYPE_ZFS), NULL, 0, &opt, 1)) != 0) {
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switch (errno) {
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case ENAMETOOLONG:
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return (set_error(lbh, BE_ERR_PATHLEN));
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case ELOOP:
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case ENOENT:
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case ENOTDIR:
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return (set_error(lbh, BE_ERR_BADPATH));
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case EPERM:
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return (set_error(lbh, BE_ERR_PERMS));
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case EBUSY:
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return (set_error(lbh, BE_ERR_PATHBUSY));
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default:
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return (set_error(lbh, BE_ERR_UNKNOWN));
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}
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}
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if (result_loc != NULL)
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strcpy(result_loc, mountpoint == NULL ? mnt_temp : mountpoint);
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return (BE_ERR_SUCCESS);
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}
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/*
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* usage
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*/
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int
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be_unmount(libbe_handle_t *lbh, char *bootenv, int flags)
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{
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int err, mntflags;
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char be[BE_MAXPATHLEN];
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struct statfs *mntbuf;
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int mntsize;
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char *mntpath;
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if ((err = be_root_concat(lbh, bootenv, be)) != 0)
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return (set_error(lbh, err));
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if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) {
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if (errno == EIO)
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return (set_error(lbh, BE_ERR_IO));
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return (set_error(lbh, BE_ERR_NOMOUNT));
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}
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mntpath = NULL;
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for (int i = 0; i < mntsize; ++i) {
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/* 0x000000de is the type number of zfs */
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if (mntbuf[i].f_type != 0x000000de)
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continue;
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if (strcmp(mntbuf[i].f_mntfromname, be) == 0) {
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mntpath = mntbuf[i].f_mntonname;
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break;
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}
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}
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if (mntpath == NULL)
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return (set_error(lbh, BE_ERR_NOMOUNT));
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mntflags = (flags & BE_MNT_FORCE) ? MNT_FORCE : 0;
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if ((err = unmount(mntpath, mntflags)) != 0) {
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switch (errno) {
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case ENAMETOOLONG:
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return (set_error(lbh, BE_ERR_PATHLEN));
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case ELOOP:
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case ENOENT:
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case ENOTDIR:
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return (set_error(lbh, BE_ERR_BADPATH));
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case EPERM:
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return (set_error(lbh, BE_ERR_PERMS));
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case EBUSY:
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return (set_error(lbh, BE_ERR_PATHBUSY));
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default:
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return (set_error(lbh, BE_ERR_UNKNOWN));
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}
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}
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return (set_error(lbh, BE_ERR_SUCCESS));
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}
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