Attachment 195669 Details for Bug 230220 – test-freeze-thaw.c

test-freeze-thaw.c

test-freeze-thaw.c (text/plain), 2.07 KB, created by Dexuan Cui on 2018-07-31 02:05:06 UTC

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Creator: Dexuan Cui

Created: 2018-07-31 02:05:06 UTC

Size: 2.07 KB

patch

obsolete

>#include <string.h>
>#include <stdio.h>
>#include <sys/ioctl.h>
>#include <sys/param.h>
>#include <sys/ucred.h>
>#include <sys/mount.h>
>#include <sys/types.h>
>
>#include <unistd.h>
>#include <stdlib.h>
>#include <poll.h>
>#include <stdint.h>
>#include <syslog.h>
>#include <errno.h>
>#include <err.h>
>#include <fcntl.h>
>#include <ufs/ffs/fs.h>
>#include <paths.h>
>#include <sysexits.h>
>
>static int g_ufs_suspend_handle = -1;
>static const char *dev = "/dev";
>
>static int freeze(void)
>{
>	struct statfs *mntbuf, *statfsp;
>	int mntsize;
>	int error = 0;
>	int i;
>
>	g_ufs_suspend_handle = open(_PATH_UFSSUSPEND, O_RDWR);
>	if (g_ufs_suspend_handle == -1) {
>		printf("unable to open %s", _PATH_UFSSUSPEND);
>		return (errno);
>	}
>
>	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
>	if (mntsize == 0) {
>		printf("There is no mount information\n");
>		return (EINVAL);
>	}
>
>	for (i = mntsize - 1; i >= 0; --i)
>	{
>		statfsp = &mntbuf[i];
>
>		if (strncmp(statfsp->f_mntonname, dev, strlen(dev)) == 0)
>			continue; /* skip to freeze '/dev' */
>
>		if (statfsp->f_flags & MNT_RDONLY)
>			continue; /* skip to freeze RDONLY partition */
>
>		if (strncmp(statfsp->f_fstypename, "ufs", 3) != 0)
>			continue; /* so far, only UFS can be frozen */
>
>		printf("suspending fs: %s\n",  statfsp->f_mntonname);
>		error = ioctl(g_ufs_suspend_handle, UFSSUSPEND, &statfsp->f_fsid);
>		if (error != 0) {
>			printf("error: %d\n", errno);
>			error = errno;
>		} else {
>			printf("Successfully suspend fs: %s\n",  statfsp->f_mntonname);
>		}
>	}
>
>	return (error);
>}
>
>/**
> * closing the opened handle will thaw the FS.
> */
>static int thaw(void)
>{
>	int error = 0;
>
>	if (g_ufs_suspend_handle != -1) {
>		error = close(g_ufs_suspend_handle);
>		if (!error) {
>			g_ufs_suspend_handle = -1;
>			printf("Successfully thaw the fs\n");
>		} else {
>			error = errno;
>			printf("Fail to thaw the fs: "
>			    "%d %s\n", errno, strerror(errno));
>		}
>	} else {
>		printf("The fs has already been thawed\n\n");
>	}
>
>	return (error);
>}
>
>
>int main(int argc, char* argv[])
>{
>	int error;
>
>	error = freeze();
>	printf("freeze: err=%d\n\n", error);
>
>	error = thaw();
>	printf("thaw: err=%d\n", error);
>
>	return 0;
>}

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Attachments on bug 230220: 195669 | 195682 | 195685