[thirdparty/xfsprogs-dev.git] / io / swapext.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2018 Red Hat, Inc.
 * All Rights Reserved.
 */

#include "command.h"
#include "input.h"
#include "init.h"
#include "io.h"
#include "libfrog/logging.h"
#include "libfrog/fsgeom.h"
#include "libfrog/bulkstat.h"

static cmdinfo_t swapext_cmd;

static void
swapext_help(void)
{
	printf(_(
"\n"
" Swaps extents between the open file descriptor and the supplied filename.\n"
"\n"));
}

static int
swapext_f(
	int			argc,
	char			**argv)
{
	struct xfs_fd		fxfd = XFS_FD_INIT(file->fd);
	struct xfs_bulkstat	bulkstat;
	int			fd;
	int			error;
	struct xfs_swapext	sx;
	struct stat		stat;

	/* open the donor file */
	fd = openfile(argv[1], NULL, 0, 0, NULL);
	if (fd < 0)
		return 0;

	/*
	 * stat the target file to get the inode number and use the latter to
	 * get the bulkstat info for the swapext cmd.
	 */
	error = fstat(file->fd, &stat);
	if (error) {
		perror("fstat");
		goto out;
	}

	error = -xfrog_bulkstat_single(&fxfd, stat.st_ino, 0, &bulkstat);
	if (error) {
		xfrog_perror(error, "bulkstat");
		goto out;
	}
	error = -xfrog_bulkstat_v5_to_v1(&fxfd, &sx.sx_stat, &bulkstat);
	if (error) {
		xfrog_perror(error, "bulkstat conversion");
		goto out;
	}
	sx.sx_version = XFS_SX_VERSION;
	sx.sx_fdtarget = file->fd;
	sx.sx_fdtmp = fd;
	sx.sx_offset = 0;
	sx.sx_length = stat.st_size;
	error = ioctl(file->fd, XFS_IOC_SWAPEXT, &sx);
	if (error)
		perror("swapext");

out:
	close(fd);
	return 0;
}

void
swapext_init(void)
{
	swapext_cmd.name = "swapext";
	swapext_cmd.cfunc = swapext_f;
	swapext_cmd.argmin = 1;
	swapext_cmd.argmax = 1;
	swapext_cmd.flags = CMD_NOMAP_OK;
	swapext_cmd.args = _("<donorfile>");
	swapext_cmd.oneline = _("Swap extents between files.");
	swapext_cmd.help = swapext_help;

	add_command(&swapext_cmd);
}
Commit	Line	Data
959ef981	1	// SPDX-License-Identifier: GPL-2.0
57e7138a BF	2	/*
	3	* Copyright (c) 2018 Red Hat, Inc.
	4	* All Rights Reserved.
57e7138a BF	5	*/
	6
	7	#include "command.h"
	8	#include "input.h"
	9	#include "init.h"
	10	#include "io.h"
9fc3ef62	11	#include "libfrog/logging.h"
fee68490	12	#include "libfrog/fsgeom.h"
f31b5e12	13	#include "libfrog/bulkstat.h"
57e7138a BF	14
	15	static cmdinfo_t swapext_cmd;
	16
	17	static void
	18	swapext_help(void)
	19	{
	20	printf(_(
	21	"\n"
	22	" Swaps extents between the open file descriptor and the supplied filename.\n"
	23	"\n"));
	24	}
	25
57e7138a BF	26	static int
	27	swapext_f(
	28	int argc,
	29	char **argv)
	30	{
f31b5e12	31	struct xfs_fd fxfd = XFS_FD_INIT(file->fd);
4cca629d	32	struct xfs_bulkstat bulkstat;
57e7138a BF	33	int fd;
	34	int error;
	35	struct xfs_swapext sx;
	36	struct stat stat;
	37
	38	/* open the donor file */
	39	fd = openfile(argv[1], NULL, 0, 0, NULL);
	40	if (fd < 0)
	41	return 0;
	42
	43	/*
	44	* stat the target file to get the inode number and use the latter to
	45	* get the bulkstat info for the swapext cmd.
	46	*/
	47	error = fstat(file->fd, &stat);
	48	if (error) {
	49	perror("fstat");
	50	goto out;
	51	}
	52
e6542132	53	error = -xfrog_bulkstat_single(&fxfd, stat.st_ino, 0, &bulkstat);
57e7138a	54	if (error) {
9fc3ef62	55	xfrog_perror(error, "bulkstat");
57e7138a BF	56	goto out;
57e7138a BF	57	}
e6542132	58	error = -xfrog_bulkstat_v5_to_v1(&fxfd, &sx.sx_stat, &bulkstat);
4cca629d	59	if (error) {
9fc3ef62	60	xfrog_perror(error, "bulkstat conversion");
4cca629d DW	61	goto out;
4cca629d DW	62	}
57e7138a BF	63	sx.sx_version = XFS_SX_VERSION;
	64	sx.sx_fdtarget = file->fd;
	65	sx.sx_fdtmp = fd;
	66	sx.sx_offset = 0;
	67	sx.sx_length = stat.st_size;
	68	error = ioctl(file->fd, XFS_IOC_SWAPEXT, &sx);
	69	if (error)
	70	perror("swapext");
	71
	72	out:
	73	close(fd);
	74	return 0;
	75	}
	76
	77	void
	78	swapext_init(void)
	79	{
	80	swapext_cmd.name = "swapext";
	81	swapext_cmd.cfunc = swapext_f;
	82	swapext_cmd.argmin = 1;
	83	swapext_cmd.argmax = 1;
	84	swapext_cmd.flags = CMD_NOMAP_OK;
	85	swapext_cmd.args = _("<donorfile>");
	86	swapext_cmd.oneline = _("Swap extents between files.");
	87	swapext_cmd.help = swapext_help;
	88
	89	add_command(&swapext_cmd);
	90	}