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Add xfs_info to show the geometry of the xfs filesystem. Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com> RWMJ: - Updated po/POTFILES. - Use xfs_ prefix for all struct fields. - Return uninitialized fields as -1 / empty string. - Copyedit the description.
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@@ -165,6 +165,7 @@ guestfsd_SOURCES = \ | |
utimens.c \ | ||
wc.c \ | ||
xattr.c \ | ||
xfs.c \ | ||
zero.c \ | ||
zerofree.c | ||
guestfsd_LDADD = \ | ||
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/* libguestfs - the guestfsd daemon | ||
* Copyright (C) 2012 Fujitsu Limited. | ||
* | ||
* This program is free software; you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation; either version 2 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* This program is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program; if not, write to the Free Software | ||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
*/ | ||
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#include <config.h> | ||
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#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <inttypes.h> | ||
#include <string.h> | ||
#include <unistd.h> | ||
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#include "daemon.h" | ||
#include "actions.h" | ||
#include "optgroups.h" | ||
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int | ||
optgroup_xfs_available (void) | ||
{ | ||
return prog_exists ("mkfs.xfs"); | ||
} | ||
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static char * | ||
split_strdup (char *string) | ||
{ | ||
char *end = string; | ||
while (*end != ' ' && *end != ',' && *end != '\0') end++; | ||
size_t len = end - string; | ||
char *ret = malloc (len + 1); | ||
if (!ret) { | ||
reply_with_perror ("malloc"); | ||
return NULL; | ||
} | ||
strncpy (ret, string, len); | ||
ret[len] = '\0'; | ||
return ret; | ||
} | ||
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static int | ||
parse_uint32 (uint32_t *ret, const char *str) | ||
{ | ||
uint32_t r; | ||
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if (sscanf (str, "%" SCNu32, &r) != 1) { | ||
reply_with_error ("cannot parse numeric field from isoinfo: %s", str); | ||
return -1; | ||
} | ||
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*ret = r; | ||
return 0; | ||
} | ||
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static int | ||
parse_uint64 (uint64_t *ret, const char *str) | ||
{ | ||
uint64_t r; | ||
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if (sscanf (str, "%" SCNu64, &r) != 1) { | ||
reply_with_error ("cannot parse numeric field from isoinfo: %s", str); | ||
return -1; | ||
} | ||
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*ret = r; | ||
return 0; | ||
} | ||
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/* Typical crazy output from the xfs_info command: | ||
* | ||
* meta-data=/dev/sda1 isize=256 agcount=4, agsize=6392 blks | ||
* = sectsz=512 attr=2 | ||
* data = bsize=4096 blocks=25568, imaxpct=25 | ||
* = sunit=0 swidth=0 blks | ||
* naming =version 2 bsize=4096 ascii-ci=0 | ||
* log =internal bsize=4096 blocks=1200, version=2 | ||
* = sectsz=512 sunit=0 blks, lazy-count=1 | ||
* realtime =none extsz=4096 blocks=0, rtextents=0 | ||
* | ||
* We may need to revisit this parsing code if the output changes | ||
* in future. | ||
*/ | ||
static guestfs_int_xfsinfo * | ||
parse_xfs_info (char **lines) | ||
{ | ||
guestfs_int_xfsinfo *ret; | ||
char *buf = NULL, *p; | ||
size_t i; | ||
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ret = malloc (sizeof *ret); | ||
if (ret == NULL) { | ||
reply_with_error ("malloc"); | ||
return NULL; | ||
} | ||
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/* Initialize fields to NULL or -1 so the caller can tell which fields | ||
* were updated in the code below. | ||
*/ | ||
ret->xfs_mntpoint = NULL; | ||
ret->xfs_inodesize = -1; | ||
ret->xfs_agcount = -1; | ||
ret->xfs_agsize = -1; | ||
ret->xfs_sectsize = -1; | ||
ret->xfs_attr = -1; | ||
ret->xfs_blocksize = -1; | ||
ret->xfs_datablocks = -1; | ||
ret->xfs_imaxpct = -1; | ||
ret->xfs_sunit = -1; | ||
ret->xfs_swidth = -1; | ||
ret->xfs_dirversion = -1; | ||
ret->xfs_dirblocksize = -1; | ||
ret->xfs_cimode = -1; | ||
ret->xfs_logname = NULL; | ||
ret->xfs_logblocksize = -1; | ||
ret->xfs_logblocks = -1; | ||
ret->xfs_logversion = -1; | ||
ret->xfs_logsectsize = -1; | ||
ret->xfs_logsunit = -1; | ||
ret->xfs_lazycount = -1; | ||
ret->xfs_rtname = NULL; | ||
ret->xfs_rtextsize = -1; | ||
ret->xfs_rtblocks = -1; | ||
ret->xfs_rtextents = -1; | ||
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for (i = 0; lines[i] != NULL; ++i) { | ||
if ((p = strstr (lines[i], "meta-data="))) { | ||
ret->xfs_mntpoint = split_strdup (p + 10); | ||
if (ret->xfs_mntpoint == NULL) goto error; | ||
} | ||
if ((p = strstr (lines[i], "isize="))) { | ||
buf = split_strdup (p + 6); | ||
if (buf == NULL) goto error; | ||
if (parse_uint32 (&ret->xfs_inodesize, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} | ||
if ((p = strstr (lines[i], "agcount="))) { | ||
buf = split_strdup (p + 8); | ||
if (buf == NULL) goto error; | ||
if (parse_uint32 (&ret->xfs_agcount, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} | ||
if ((p = strstr (lines[i], "agsize="))) { | ||
buf = split_strdup (p + 7); | ||
if (buf == NULL) goto error; | ||
if (parse_uint32 (&ret->xfs_agsize, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} | ||
if ((p = strstr (lines[i], "sectsz="))) { | ||
buf = split_strdup (p + 7); | ||
if (buf == NULL) goto error; | ||
if (i == 1) { | ||
if (parse_uint32 (&ret->xfs_sectsize, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} else if (i == 6) { | ||
if (parse_uint32 (&ret->xfs_logsectsize, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} else goto error; | ||
} | ||
if ((p = strstr (lines[i], "attr="))) { | ||
buf = split_strdup (p + 5); | ||
if (buf == NULL) goto error; | ||
if (parse_uint32 (&ret->xfs_attr, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} | ||
if ((p = strstr (lines[i], "bsize="))) { | ||
buf = split_strdup (p + 6); | ||
if (buf == NULL) goto error; | ||
if (i == 2) { | ||
if (parse_uint32 (&ret->xfs_blocksize, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} else if (i == 4) { | ||
if (parse_uint32 (&ret->xfs_dirblocksize, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} else if (i == 5) { | ||
if (parse_uint32 (&ret->xfs_logblocksize, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} else goto error; | ||
} | ||
if ((p = strstr (lines[i], "blocks="))) { | ||
buf = split_strdup (p + 7); | ||
if (buf == NULL) goto error; | ||
if (i == 2) { | ||
if (parse_uint64 (&ret->xfs_datablocks, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} else if (i == 5) { | ||
if (parse_uint32 (&ret->xfs_logblocks, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} else if (i == 7) { | ||
if (parse_uint64 (&ret->xfs_rtblocks, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} else goto error; | ||
} | ||
if ((p = strstr (lines[i], "imaxpct="))) { | ||
buf = split_strdup (p + 8); | ||
if (buf == NULL) goto error; | ||
if (parse_uint32 (&ret->xfs_imaxpct, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} | ||
if ((p = strstr (lines[i], "sunit="))) { | ||
buf = split_strdup (p + 6); | ||
if (buf == NULL) goto error; | ||
if (i == 3) { | ||
if (parse_uint32 (&ret->xfs_sunit, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} else if (i == 6) { | ||
if (parse_uint32 (&ret->xfs_logsunit, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} else goto error; | ||
} | ||
if ((p = strstr (lines[i], "swidth="))) { | ||
buf = split_strdup (p + 7); | ||
if (buf == NULL) goto error; | ||
if (parse_uint32 (&ret->xfs_swidth, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} | ||
if ((p = strstr (lines[i], "naming =version "))) { | ||
buf = split_strdup (p + 18); | ||
if (buf == NULL) goto error; | ||
if (parse_uint32 (&ret->xfs_dirversion, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} | ||
if ((p = strstr (lines[i], "ascii-ci="))) { | ||
buf = split_strdup (p + 9); | ||
if (buf == NULL) goto error; | ||
if (parse_uint32 (&ret->xfs_cimode, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} | ||
if ((p = strstr (lines[i], "log ="))) { | ||
ret->xfs_logname = split_strdup (p + 10); | ||
if (ret->xfs_logname == NULL) goto error; | ||
} | ||
if ((p = strstr (lines[i], "version="))) { | ||
buf = split_strdup (p + 8); | ||
if (buf == NULL) goto error; | ||
if (parse_uint32 (&ret->xfs_logversion, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} | ||
if ((p = strstr (lines[i], "lazy-count="))) { | ||
buf = split_strdup (p + 11); | ||
if (buf == NULL) goto error; | ||
if (parse_uint32 (&ret->xfs_lazycount, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} | ||
if ((p = strstr (lines[i], "realtime ="))) { | ||
ret->xfs_rtname = split_strdup (p + 10); | ||
if (ret->xfs_rtname == NULL) goto error; | ||
} | ||
if ((p = strstr (lines[i], "rtextents="))) { | ||
buf = split_strdup (p + 10); | ||
if (buf == NULL) goto error; | ||
if (parse_uint64 (&ret->xfs_rtextents, buf) == -1) | ||
goto error; | ||
free (buf); | ||
} | ||
} | ||
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if (ret->xfs_mntpoint == NULL) { | ||
ret->xfs_mntpoint = strdup (""); | ||
if (ret->xfs_mntpoint == NULL) goto error; | ||
} | ||
if (ret->xfs_logname == NULL) { | ||
ret->xfs_logname = strdup (""); | ||
if (ret->xfs_logname == NULL) goto error; | ||
} | ||
if (ret->xfs_rtname == NULL) { | ||
ret->xfs_rtname = strdup (""); | ||
if (ret->xfs_rtname == NULL) goto error; | ||
} | ||
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return ret; | ||
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error: | ||
free (buf); | ||
free (ret->xfs_mntpoint); | ||
free (ret->xfs_logname); | ||
free (ret->xfs_rtname); | ||
free (ret); | ||
return NULL; | ||
} | ||
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guestfs_int_xfsinfo * | ||
do_xfs_info (const char *path) | ||
{ | ||
int r; | ||
char *buf; | ||
char *out = NULL, *err = NULL; | ||
char **lines = NULL; | ||
guestfs_int_xfsinfo *ret = NULL; | ||
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if (do_is_dir (path)) { | ||
buf = sysroot_path (path); | ||
if (!buf) { | ||
reply_with_perror ("malloc"); | ||
return NULL; | ||
} | ||
} else { | ||
buf = strdup(path); | ||
if (!buf) { | ||
reply_with_perror ("strdup"); | ||
return NULL; | ||
} | ||
} | ||
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r = command (&out, &err, "xfs_info", buf, NULL); | ||
free (buf); | ||
if (r == -1) { | ||
reply_with_error ("%s", err); | ||
goto error; | ||
} | ||
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lines = split_lines (out); | ||
if (lines == NULL) | ||
goto error; | ||
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ret = parse_xfs_info (lines); | ||
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error: | ||
free (err); | ||
free (out); | ||
if (lines) | ||
free_strings (lines); | ||
return ret; | ||
} |
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