mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-21 22:53:37 +00:00
116a41d048
Because we run the external fstrim command we don't have access to the kernel errno when it fails. However in the case where it prints this specific error message, turn that into errno ENOTSUP.
123 lines
3.2 KiB
C
123 lines
3.2 KiB
C
/* libguestfs - the guestfsd daemon
|
|
* Copyright (C) 2012 Red Hat Inc.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <inttypes.h>
|
|
|
|
#include "guestfs_protocol.h"
|
|
#include "daemon.h"
|
|
#include "actions.h"
|
|
#include "optgroups.h"
|
|
|
|
#define MAX_ARGS 64
|
|
|
|
GUESTFSD_EXT_CMD(str_fstrim, fstrim);
|
|
|
|
int
|
|
optgroup_fstrim_available (void)
|
|
{
|
|
return prog_exists (str_fstrim);
|
|
}
|
|
|
|
/* Takes optional arguments, consult optargs_bitmask. */
|
|
int
|
|
do_fstrim (const char *path,
|
|
int64_t offset, int64_t length, int64_t minimumfreeextent)
|
|
{
|
|
const char *argv[MAX_ARGS];
|
|
size_t i = 0;
|
|
char offset_s[64], length_s[64], mfe_s[64];
|
|
CLEANUP_FREE char *buf = NULL;
|
|
CLEANUP_FREE char *out = NULL, *err = NULL;
|
|
int r;
|
|
|
|
/* Suggested by Paolo Bonzini to fix fstrim problem.
|
|
* https://lists.gnu.org/archive/html/qemu-devel/2014-03/msg02978.html
|
|
*/
|
|
sync_disks ();
|
|
|
|
ADD_ARG (argv, i, str_fstrim);
|
|
|
|
if ((optargs_bitmask & GUESTFS_FSTRIM_OFFSET_BITMASK)) {
|
|
if (offset < 0) {
|
|
reply_with_error ("offset < 0");
|
|
return -1;
|
|
}
|
|
|
|
snprintf (offset_s, sizeof offset_s, "%" PRIi64, offset);
|
|
ADD_ARG (argv, i, "-o");
|
|
ADD_ARG (argv, i, offset_s);
|
|
}
|
|
|
|
if ((optargs_bitmask & GUESTFS_FSTRIM_LENGTH_BITMASK)) {
|
|
if (length <= 0) {
|
|
reply_with_error ("length <= 0");
|
|
return -1;
|
|
}
|
|
|
|
snprintf (length_s, sizeof length_s, "%" PRIi64, length);
|
|
ADD_ARG (argv, i, "-l");
|
|
ADD_ARG (argv, i, length_s);
|
|
}
|
|
|
|
if ((optargs_bitmask & GUESTFS_FSTRIM_MINIMUMFREEEXTENT_BITMASK)) {
|
|
if (minimumfreeextent <= 0) {
|
|
reply_with_error ("minimumfreeextent <= 0");
|
|
return -1;
|
|
}
|
|
|
|
snprintf (mfe_s, sizeof mfe_s, "%" PRIi64, minimumfreeextent);
|
|
ADD_ARG (argv, i, "-m");
|
|
ADD_ARG (argv, i, mfe_s);
|
|
}
|
|
|
|
/* When running in debug mode, use -v, capture stdout and print it below. */
|
|
if (verbose)
|
|
ADD_ARG (argv, i, "-v");
|
|
|
|
buf = sysroot_path (path);
|
|
if (!buf) {
|
|
reply_with_error ("malloc");
|
|
return -1;
|
|
}
|
|
|
|
ADD_ARG (argv, i, buf);
|
|
ADD_ARG (argv, i, NULL);
|
|
|
|
r = commandv (&out, &err, argv);
|
|
if (r == -1) {
|
|
/* If the error is about the kernel operation not being supported
|
|
* for this filesystem type, then return errno ENOTSUP here.
|
|
*/
|
|
if (strstr (err, "discard operation is not supported"))
|
|
reply_with_error_errno (ENOTSUP, "%s", err);
|
|
else
|
|
reply_with_error ("%s", err);
|
|
return -1;
|
|
}
|
|
|
|
if (verbose)
|
|
fprintf (stderr, "%s\n", out);
|
|
|
|
return 0;
|
|
}
|