[dragonfly.git] / sbin / hammer / cmd_info.c

/*
 * Copyright (c) 2009 The DragonFly Project.  All rights reserved.
 *
 * This code is derived from software contributed to The DragonFly Project
 * by Antonio Huete <tuxillo@quantumachine.net>
 *
 * 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.
 * 3. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 * COPYRIGHT HOLDERS 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 "hammer.h"
#include <libutil.h>

void	show_info(char *path);
char	*find_pfs_mount(int pfsid, uuid_t parentuuid, int ismaster);
double	percent(int64_t value, int64_t total);
u_int32_t count_snapshots(int fd, u_int32_t version, char *pfs_snapshots, char *mountedon);

void
hammer_cmd_info(void)
{
	struct statfs *stfsbuf;
	int mntsize, i, first = 1;
	char *fstype, *path;

	tzset();
	mntsize = getmntinfo(&stfsbuf, MNT_NOWAIT);
	if (mntsize > 0) {
		for (i=0; i < mntsize; i++) {
			fstype = stfsbuf[i].f_fstypename;
			path = stfsbuf[i].f_mntonname;
			if ((strcmp(fstype, "hammer")) == 0) {
				if (first)
					first = 0;
				else
					fprintf(stdout, "\n");
				show_info(path);
			}
		}
	} else {
		fprintf(stdout, "No mounted filesystems found\n");
	}

}

void
show_info(char *path)
{
	struct	    hammer_pseudofs_data pfs_od;
	struct	    hammer_ioc_pseudofs_rw pfs;
	int64_t	    usedbigblocks, bytes;
	struct	    hammer_ioc_info info;
	int         fd, pfs_id, ismaster;
	char	    *fsid;
	char	    *mountedon;
	char	    buf[6];
	u_int32_t   sc;

	fsid = mountedon = NULL;
	usedbigblocks = 0;
	pfs_id = 0;	      /* Include PFS#0 */
	bytes = 0;
	sc = 0;

	bzero(&info, sizeof(struct hammer_ioc_info));

	/* Try to get a file descriptor based on the path given */
	fd = open(path, O_RDONLY);
	if (fd < 0) {
		perror("show_info");
		exit(EXIT_FAILURE);
	}

	if ((ioctl(fd, HAMMERIOC_GET_INFO, &info)) < 0) {
		perror("show_info");
		exit(EXIT_FAILURE);
	}

	/* Find out the UUID strings */
	uuid_to_string(&info.vol_fsid, &fsid, NULL);

	/* Volume information */
	fprintf(stdout, "Volume identification\n");
	fprintf(stdout, "\tLabel               %s\n", info.vol_name);
	fprintf(stdout, "\tNo. Volumes         %d\n", info.nvolumes);
	fprintf(stdout, "\tFSID                %s\n", fsid);
	fprintf(stdout, "\tHAMMER Version      %d\n", info.version);

	/* Big blocks information */
	usedbigblocks = info.bigblocks - info.freebigblocks;

	fprintf(stdout, "Big block information\n");
	fprintf(stdout, "\tTotal      %10jd\n", (intmax_t)info.bigblocks);
	fprintf(stdout, "\tUsed       %10jd (%.2lf%%)\n"
			"\tReserved   %10jd (%.2lf%%)\n"
			"\tFree       %10jd (%.2lf%%)\n",
			(intmax_t)usedbigblocks,
			percent(usedbigblocks, info.bigblocks),
			(intmax_t)info.rsvbigblocks,
			percent(info.rsvbigblocks, info.bigblocks),
			(intmax_t)(info.freebigblocks - info.rsvbigblocks),
			percent(info.freebigblocks - info.rsvbigblocks,
				info.bigblocks));
	fprintf(stdout, "Space information\n");

	/* Space information */
	fprintf(stdout, "\tNo. Inodes %10jd\n", (intmax_t)info.inodes);
	bytes = (info.bigblocks << HAMMER_LARGEBLOCK_BITS);
	humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "",
			HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
	fprintf(stdout, "\tTotal size     %6s (%jd bytes)\n",
		buf, (intmax_t)bytes);

	bytes = (usedbigblocks << HAMMER_LARGEBLOCK_BITS);
	humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "",
			HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
	fprintf(stdout, "\tUsed space     %6s\n", buf);

	bytes = (info.rsvbigblocks << HAMMER_LARGEBLOCK_BITS);
	humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "",
			HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
	fprintf(stdout, "\tReserved space %6s\n", buf);

	bytes = ((info.freebigblocks - info.rsvbigblocks) << HAMMER_LARGEBLOCK_BITS);
	humanize_number(buf, sizeof(buf)  - (bytes < 0 ? 0 : 1), bytes, "",
			HN_AUTOSCALE, HN_DECIMAL | HN_NOSPACE | HN_B);
	fprintf(stdout, "\tFree space     %6s\n", buf);

	/* Pseudo-filesystem information */
	fprintf(stdout, "PFS information\n");
	fprintf(stdout, "\tPFS-Id  Mode    Snaps  Mounted-on\n");

	while(pfs_id < HAMMER_MAX_PFS) {
		bzero(&pfs, sizeof(pfs));
		bzero(&pfs_od, sizeof(pfs_od));
		pfs.pfs_id = pfs_id;
		pfs.ondisk = &pfs_od;
		pfs.bytes = sizeof(pfs_od);
		pfs.version = HAMMER_IOC_PSEUDOFS_VERSION;
		if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) >= 0) {
			ismaster = (pfs_od.mirror_flags & HAMMER_PFSD_SLAVE) ? 0 : 1;
			if (pfs_id == 0)
				mountedon = path;
			else
				mountedon = find_pfs_mount(pfs_id, info.vol_fsid, ismaster);

			sc = count_snapshots(fd, info.version, pfs_od.snapshots, mountedon);

			fprintf(stdout, "\t%6d  %-6s %6d  ",
				pfs_id, (ismaster ? "MASTER" : "SLAVE"), sc);
			if (mountedon)
				fprintf(stdout, "%s", mountedon);
			else
				fprintf(stdout, "not-mounted");
			fprintf(stdout, "\n");
		}
		pfs_id++;
	}

	free(fsid);
	free(mountedon);
}

char *
find_pfs_mount(int pfsid, uuid_t parentuuid, int ismaster)
{
	struct hammer_ioc_info hi;
	struct statfs *mntbuf;
	int mntsize;
	int curmount;
	int fd;
	size_t	mntbufsize;
	char *trailstr;
	char *retval;

	retval = NULL;

	/* Do not continue if there are no mounted filesystems */
	mntsize = getfsstat(NULL, 0, MNT_NOWAIT);
	if (mntsize <= 0)
		return retval;

	mntbufsize = (mntsize) * sizeof(struct statfs);
	mntbuf = malloc(mntbufsize);
	if (mntbuf == NULL) {
		perror("show_info");
		exit(EXIT_FAILURE);
	}

	mntsize = getfsstat(mntbuf, (long)mntbufsize, MNT_NOWAIT);
	curmount = mntsize - 1;

	asprintf(&trailstr, ":%05d", pfsid);

	/*
	 * Iterate all the mounted points looking for the PFS passed to
	 * this function.
	 */
	while(curmount >= 0) {
		/*
		 * We need to avoid that PFS belonging to other HAMMER
		 * filesystems are showed as mounted, so we compare
		 * against the FSID, which is presumable to be unique.
		 */
		bzero(&hi, sizeof(hi));
		if ((fd = open(mntbuf[curmount].f_mntfromname, O_RDONLY)) < 0) {
			curmount--;
			continue;
		}

		if ((ioctl(fd, HAMMERIOC_GET_INFO, &hi)) < 0) {
			curmount--;
			continue;
		}

		if (strstr(mntbuf[curmount].f_mntfromname, trailstr) != NULL &&
		    (uuid_compare(&hi.vol_fsid, &parentuuid, NULL)) == 0) {
			if (ismaster) {
				if (strstr(mntbuf[curmount].f_mntfromname, "@@-1") != NULL) {
					retval = strdup(mntbuf[curmount].f_mntonname);
					break;
				}
			} else {
				if (strstr(mntbuf[curmount].f_mntfromname, "@@0x") != NULL ) {
					retval = strdup(mntbuf[curmount].f_mntonname);
					break;
				}
			}
		}
		curmount--;
	}
	free(trailstr);
	return retval;
}

double
percent(int64_t value, int64_t total)
{
	/* Avoid divide-by-zero */
	if (total == 0)
		return 100.0;

	return ((value * 100.0) / (double)total);
}

u_int32_t
count_snapshots(int fd, u_int32_t version, char *pfs_snapshots, char *mountedon)
{
	struct hammer_ioc_snapshot snapinfo;
	char *snapshots_path, *fpath;
	struct dirent *den;
	struct stat st;
	DIR *dir;
	u_int32_t snapshot_count = 0;

	bzero(&snapinfo, sizeof(struct hammer_ioc_snapshot));
	if (version < 3) {
		/*
		 * old style: count the number of softlinks in the snapshots dir
		 */
		if (pfs_snapshots[0])
			snapshots_path = pfs_snapshots;
		else
			asprintf(&snapshots_path, "%s/snapshots", mountedon);
		if ((dir = opendir(snapshots_path)) != NULL) {
			while ((den = readdir(dir)) != NULL) {
				if (den->d_name[0] == '.')
					continue;
				asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
				if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode))
					snapshot_count++;
				free(fpath);
			}
			closedir(dir);
		}
	} else {
		/*
		 * new style: file system meta-data
		 */
		do {
			if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapinfo) < 0) {
				perror("count_snapshots");
				exit(EXIT_FAILURE);
			}
			snapshot_count += snapinfo.count;
		} while (snapinfo.head.error == 0 && snapinfo.count);
	}
	return snapshot_count;
}
Commit	Line	Data
b66b9421 AH	1	/*
	2	* Copyright (c) 2009 The DragonFly Project. All rights reserved.
	3	*
eac446c5 MD	4	* This code is derived from software contributed to The DragonFly Project
	5	* by Antonio Huete <tuxillo@quantumachine.net>
	6	*
b66b9421 AH	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	*
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in
	15	* the documentation and/or other materials provided with the
	16	* distribution.
	17	* 3. Neither the name of The DragonFly Project nor the names of its
	18	* contributors may be used to endorse or promote products derived
	19	* from this software without specific, prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	22	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	23	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	24	* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	25	* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	26	* INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
	27	* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	28	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
	29	* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	30	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
	31	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	32	* SUCH DAMAGE.
	33	*
	34	*/
	35	#include "hammer.h"
	36	#include <libutil.h>
	37
	38	void show_info(char *path);
7bb56fa9	39	char *find_pfs_mount(int pfsid, uuid_t parentuuid, int ismaster);
eac446c5	40	double percent(int64_t value, int64_t total);
095ad2eb	41	u_int32_t count_snapshots(int fd, u_int32_t version, char pfs_snapshots, char mountedon);
b66b9421 AH	42
b66b9421 AH	43	void
eac446c5	44	hammer_cmd_info(void)
b66b9421	45	{
eac446c5	46	struct statfs *stfsbuf;
095ad2eb	47	int mntsize, i, first = 1;
eac446c5	48	char fstype, path;
b66b9421 AH	49
b66b9421 AH	50	tzset();
eac446c5 MD	51	mntsize = getmntinfo(&stfsbuf, MNT_NOWAIT);
	52	if (mntsize > 0) {
	53	for (i=0; i < mntsize; i++) {
	54	fstype = stfsbuf[i].f_fstypename;
	55	path = stfsbuf[i].f_mntonname;
095ad2eb TN	56	if ((strcmp(fstype, "hammer")) == 0) {
	57	if (first)
	58	first = 0;
	59	else
	60	fprintf(stdout, "\n");
b66b9421	61	show_info(path);
095ad2eb	62	}
b66b9421	63	}
7bb56fa9	64	} else {
eac446c5	65	fprintf(stdout, "No mounted filesystems found\n");
7bb56fa9	66	}
eac446c5	67
b66b9421 AH	68	}
b66b9421 AH	69
7bb56fa9 MD	70	void
	71	show_info(char *path)
	72	{
7bb56fa9 MD	73	struct hammer_pseudofs_data pfs_od;
	74	struct hammer_ioc_pseudofs_rw pfs;
	75	int64_t usedbigblocks, bytes;
	76	struct hammer_ioc_info info;
	77	int fd, pfs_id, ismaster;
095ad2eb	78	char *fsid;
7bb56fa9 MD	79	char *mountedon;
	80	char buf[6];
	81	u_int32_t sc;
b66b9421	82
095ad2eb	83	fsid = mountedon = NULL;
eac446c5	84	usedbigblocks = 0;
095ad2eb	85	pfs_id = 0; /* Include PFS#0 */
eac446c5	86	bytes = 0;
7bb56fa9	87	sc = 0;
b66b9421 AH	88
	89	bzero(&info, sizeof(struct hammer_ioc_info));
	90
	91	/* Try to get a file descriptor based on the path given */
	92	fd = open(path, O_RDONLY);
	93	if (fd < 0) {
	94	perror("show_info");
	95	exit(EXIT_FAILURE);
	96	}
	97
	98	if ((ioctl(fd, HAMMERIOC_GET_INFO, &info)) < 0) {
	99	perror("show_info");
	100	exit(EXIT_FAILURE);
	101	}
	102
	103	/* Find out the UUID strings */
	104	uuid_to_string(&info.vol_fsid, &fsid, NULL);
	105
	106	/* Volume information */
	107	fprintf(stdout, "Volume identification\n");
095ad2eb TN	108	fprintf(stdout, "\tLabel %s\n", info.vol_name);
	109	fprintf(stdout, "\tNo. Volumes %d\n", info.nvolumes);
	110	fprintf(stdout, "\tFSID %s\n", fsid);
	111	fprintf(stdout, "\tHAMMER Version %d\n", info.version);
b66b9421 AH	112
	113	/* Big blocks information */
	114	usedbigblocks = info.bigblocks - info.freebigblocks;
	115
	116	fprintf(stdout, "Big block information\n");
095ad2eb TN	117	fprintf(stdout, "\tTotal %10jd\n", (intmax_t)info.bigblocks);
	118	fprintf(stdout, "\tUsed %10jd (%.2lf%%)\n"
	119	"\tReserved %10jd (%.2lf%%)\n"
	120	"\tFree %10jd (%.2lf%%)\n",
a276dc6b MD	121	(intmax_t)usedbigblocks,
	122	percent(usedbigblocks, info.bigblocks),
	123	(intmax_t)info.rsvbigblocks,
	124	percent(info.rsvbigblocks, info.bigblocks),
	125	(intmax_t)(info.freebigblocks - info.rsvbigblocks),
	126	percent(info.freebigblocks - info.rsvbigblocks,
	127	info.bigblocks));
b66b9421 AH	128	fprintf(stdout, "Space information\n");
	129
	130	/* Space information */
095ad2eb	131	fprintf(stdout, "\tNo. Inodes %10jd\n", (intmax_t)info.inodes);
b66b9421	132	bytes = (info.bigblocks << HAMMER_LARGEBLOCK_BITS);
7bb56fa9 MD	133	humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1), bytes, "",
7bb56fa9 MD	134	HN_AUTOSCALE, HN_DECIMAL \| HN_NOSPACE \| HN_B);
a276dc6b MD	135	fprintf(stdout, "\tTotal size %6s (%jd bytes)\n",
a276dc6b MD	136	buf, (intmax_t)bytes);
b66b9421 AH	137
b66b9421 AH	138	bytes = (usedbigblocks << HAMMER_LARGEBLOCK_BITS);
7bb56fa9 MD	139	humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1), bytes, "",
7bb56fa9 MD	140	HN_AUTOSCALE, HN_DECIMAL \| HN_NOSPACE \| HN_B);
b66b9421 AH	141	fprintf(stdout, "\tUsed space %6s\n", buf);
	142
	143	bytes = (info.rsvbigblocks << HAMMER_LARGEBLOCK_BITS);
7bb56fa9 MD	144	humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1), bytes, "",
7bb56fa9 MD	145	HN_AUTOSCALE, HN_DECIMAL \| HN_NOSPACE \| HN_B);
b66b9421 AH	146	fprintf(stdout, "\tReserved space %6s\n", buf);
	147
	148	bytes = ((info.freebigblocks - info.rsvbigblocks) << HAMMER_LARGEBLOCK_BITS);
7bb56fa9 MD	149	humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1), bytes, "",
	150	HN_AUTOSCALE, HN_DECIMAL \| HN_NOSPACE \| HN_B);
	151	fprintf(stdout, "\tFree space %6s\n", buf);
	152
	153	/* Pseudo-filesystem information */
	154	fprintf(stdout, "PFS information\n");
095ad2eb	155	fprintf(stdout, "\tPFS-Id Mode Snaps Mounted-on\n");
7bb56fa9 MD	156
	157	while(pfs_id < HAMMER_MAX_PFS) {
	158	bzero(&pfs, sizeof(pfs));
	159	bzero(&pfs_od, sizeof(pfs_od));
	160	pfs.pfs_id = pfs_id;
	161	pfs.ondisk = &pfs_od;
	162	pfs.bytes = sizeof(pfs_od);
	163	pfs.version = HAMMER_IOC_PSEUDOFS_VERSION;
	164	if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) >= 0) {
7bb56fa9	165	ismaster = (pfs_od.mirror_flags & HAMMER_PFSD_SLAVE) ? 0 : 1;
095ad2eb TN	166	if (pfs_id == 0)
	167	mountedon = path;
	168	else
	169	mountedon = find_pfs_mount(pfs_id, info.vol_fsid, ismaster);
	170
	171	sc = count_snapshots(fd, info.version, pfs_od.snapshots, mountedon);
7bb56fa9	172
095ad2eb	173	fprintf(stdout, "\t%6d %-6s %6d ",
7bb56fa9 MD	174	pfs_id, (ismaster ? "MASTER" : "SLAVE"), sc);
	175	if (mountedon)
	176	fprintf(stdout, "%s", mountedon);
	177	else
	178	fprintf(stdout, "not-mounted");
	179	fprintf(stdout, "\n");
	180	}
	181	pfs_id++;
095ad2eb	182	}
7bb56fa9 MD	183
	184	free(fsid);
	185	free(mountedon);
b66b9421 AH	186	}
b66b9421 AH	187
7bb56fa9 MD	188	char *
	189	find_pfs_mount(int pfsid, uuid_t parentuuid, int ismaster)
	190	{
	191	struct hammer_ioc_info hi;
	192	struct statfs *mntbuf;
	193	int mntsize;
	194	int curmount;
	195	int fd;
	196	size_t mntbufsize;
d14ecbb6	197	char *trailstr;
7bb56fa9 MD	198	char *retval;
	199
	200	retval = NULL;
	201
	202	/* Do not continue if there are no mounted filesystems */
	203	mntsize = getfsstat(NULL, 0, MNT_NOWAIT);
	204	if (mntsize <= 0)
	205	return retval;
b66b9421	206
7bb56fa9 MD	207	mntbufsize = (mntsize) * sizeof(struct statfs);
	208	mntbuf = malloc(mntbufsize);
	209	if (mntbuf == NULL) {
	210	perror("show_info");
	211	exit(EXIT_FAILURE);
	212	}
	213
	214	mntsize = getfsstat(mntbuf, (long)mntbufsize, MNT_NOWAIT);
	215	curmount = mntsize - 1;
	216
	217	asprintf(&trailstr, ":%05d", pfsid);
	218
	219	/*
	220	* Iterate all the mounted points looking for the PFS passed to
	221	* this function.
	222	*/
	223	while(curmount >= 0) {
	224	/*
	225	* We need to avoid that PFS belonging to other HAMMER
	226	* filesystems are showed as mounted, so we compare
	227	* against the FSID, which is presumable to be unique.
	228	*/
	229	bzero(&hi, sizeof(hi));
	230	if ((fd = open(mntbuf[curmount].f_mntfromname, O_RDONLY)) < 0) {
	231	curmount--;
	232	continue;
	233	}
	234
	235	if ((ioctl(fd, HAMMERIOC_GET_INFO, &hi)) < 0) {
	236	curmount--;
	237	continue;
	238	}
	239
	240	if (strstr(mntbuf[curmount].f_mntfromname, trailstr) != NULL &&
	241	(uuid_compare(&hi.vol_fsid, &parentuuid, NULL)) == 0) {
	242	if (ismaster) {
	243	if (strstr(mntbuf[curmount].f_mntfromname, "@@-1") != NULL) {
	244	retval = strdup(mntbuf[curmount].f_mntonname);
	245	break;
	246	}
	247	} else {
	248	if (strstr(mntbuf[curmount].f_mntfromname, "@@0x") != NULL ) {
	249	retval = strdup(mntbuf[curmount].f_mntonname);
	250	break;
	251	}
	252	}
	253	}
	254	curmount--;
	255	}
	256	free(trailstr);
	257	return retval;
	258	}
	259
	260	double
	261	percent(int64_t value, int64_t total)
	262	{
b66b9421	263	/* Avoid divide-by-zero */
095ad2eb TN	264	if (total == 0)
095ad2eb TN	265	return 100.0;
b66b9421	266
eac446c5	267	return ((value * 100.0) / (double)total);
b66b9421	268	}
095ad2eb TN	269
	270	u_int32_t
	271	count_snapshots(int fd, u_int32_t version, char pfs_snapshots, char mountedon)
	272	{
	273	struct hammer_ioc_snapshot snapinfo;
	274	char snapshots_path, fpath;
	275	struct dirent *den;
	276	struct stat st;
	277	DIR *dir;
	278	u_int32_t snapshot_count = 0;
	279
	280	bzero(&snapinfo, sizeof(struct hammer_ioc_snapshot));
	281	if (version < 3) {
	282	/*
	283	* old style: count the number of softlinks in the snapshots dir
	284	*/
	285	if (pfs_snapshots[0])
	286	snapshots_path = pfs_snapshots;
	287	else
	288	asprintf(&snapshots_path, "%s/snapshots", mountedon);
	289	if ((dir = opendir(snapshots_path)) != NULL) {
	290	while ((den = readdir(dir)) != NULL) {
	291	if (den->d_name[0] == '.')
	292	continue;
	293	asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
	294	if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode))
	295	snapshot_count++;
	296	free(fpath);
	297	}
	298	closedir(dir);
	299	}
	300	} else {
	301	/*
	302	* new style: file system meta-data
	303	*/
	304	do {
	305	if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapinfo) < 0) {
	306	perror("count_snapshots");
	307	exit(EXIT_FAILURE);
	308	}
	309	snapshot_count += snapinfo.count;
	310	} while (snapinfo.head.error == 0 && snapinfo.count);
	311	}
	312	return snapshot_count;
	313	}