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/*
* Copyright (c) 2016 Jeff Mahoney <jeffm@suse.com>
* Copyright (c) 2016-2018 The strace developers.
* All rights reserved.
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "defs.h"
#include <linux/ioctl.h>
#include <linux/fs.h>
#ifdef HAVE_LINUX_FIEMAP_H
# include <linux/fiemap.h>
# include "xlat/fiemap_flags.h"
# include "xlat/fiemap_extent_flags.h"
#endif
#ifndef FICLONE
# define FICLONE _IOW(0x94, 9, int)
#endif
#ifndef FICLONERANGE
# define FICLONERANGE _IOW(0x94, 13, struct file_clone_range)
struct file_clone_range {
int64_t src_fd;
uint64_t src_offset;
uint64_t src_length;
uint64_t dest_offset;
};
#endif
#ifndef FIDEDUPERANGE
# define FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_range)
struct file_dedupe_range_info {
int64_t dest_fd; /* in - destination file */
uint64_t dest_offset; /* in - start of extent in destination */
uint64_t bytes_deduped; /* out - total # of bytes we were able
* to dedupe from this file. */
/* status of this dedupe operation:
* < 0 for error
* == FILE_DEDUPE_RANGE_SAME if dedupe succeeds
* == FILE_DEDUPE_RANGE_DIFFERS if data differs
*/
int32_t status; /* out - see above description */
uint32_t reserved; /* must be zero */
};
struct file_dedupe_range {
uint64_t src_offset; /* in - start of extent in source */
uint64_t src_length; /* in - length of extent */
uint16_t dest_count; /* in - total elements in info array */
uint16_t reserved1; /* must be zero */
uint32_t reserved2; /* must be zero */
struct file_dedupe_range_info info[0];
};
#endif
static bool
print_file_dedupe_range_info(struct tcb *tcp, void *elem_buf,
size_t elem_size, void *data)
{
const struct file_dedupe_range_info *info = elem_buf;
unsigned int *count = data;
if (count) {
if (*count == 0) {
tprints("...");
return false;
}
--*count;
}
if (entering(tcp)) {
tprints("{dest_fd=");
printfd(tcp, info->dest_fd);
tprintf(", dest_offset=%" PRIu64 "}",
(uint64_t) info->dest_offset);
} else {
tprintf("{bytes_deduped=%" PRIu64 ", status=%d}",
(uint64_t) info->bytes_deduped, info->status);
}
return true;
}
#ifdef HAVE_LINUX_FIEMAP_H
static bool
print_fiemap_extent(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
{
const struct fiemap_extent *fe = elem_buf;
tprintf("{fe_logical=%" PRI__u64
", fe_physical=%" PRI__u64
", fe_length=%" PRI__u64 ", ",
fe->fe_logical, fe->fe_physical, fe->fe_length);
printflags64(fiemap_extent_flags, fe->fe_flags,
"FIEMAP_EXTENT_???");
tprints("}");
return true;
}
#endif /* HAVE_LINUX_FIEMAP_H */
int
file_ioctl(struct tcb *const tcp, const unsigned int code,
const kernel_ulong_t arg)
{
switch (code) {
case FICLONE: /* W */
tprintf(", %d", (int) arg);
break;
case FICLONERANGE: { /* W */
struct file_clone_range args;
tprints(", ");
if (umove_or_printaddr(tcp, arg, &args))
break;
tprints("{src_fd=");
printfd(tcp, args.src_fd);
tprintf(", src_offset=%" PRIu64
", src_length=%" PRIu64
", dest_offset=%" PRIu64 "}",
(uint64_t) args.src_offset,
(uint64_t) args.src_length,
(uint64_t) args.dest_offset);
break;
}
case FIDEDUPERANGE: { /* RW */
struct file_dedupe_range args;
struct file_dedupe_range_info info;
unsigned int *limit = NULL;
unsigned int count = 2;
bool rc;
if (entering(tcp))
tprints(", ");
else if (syserror(tcp))
break;
else
tprints(" => ");
if (umove_or_printaddr(tcp, arg, &args))
break;
tprints("{");
if (entering(tcp)) {
tprintf("src_offset=%" PRIu64
", src_length=%" PRIu64
", dest_count=%hu, ",
(uint64_t) args.src_offset,
(uint64_t) args.src_length,
(uint16_t) args.dest_count);
}
tprints("info=");
/* Limit how many elements we print in abbrev mode. */
if (abbrev(tcp) && args.dest_count > count)
limit = &count;
rc = print_array(tcp, arg + offsetof(typeof(args), info),
args.dest_count, &info, sizeof(info),
tfetch_mem,
print_file_dedupe_range_info, limit);
tprints("}");
if (!rc || exiting(tcp))
break;
return 0;
}
#ifdef HAVE_LINUX_FIEMAP_H
case FS_IOC_FIEMAP: {
struct fiemap args;
if (entering(tcp))
tprints(", ");
else if (syserror(tcp))
break;
else
tprints(" => ");
if (umove_or_printaddr(tcp, arg, &args))
break;
if (entering(tcp)) {
tprintf("{fm_start=%" PRI__u64 ", "
"fm_length=%" PRI__u64 ", "
"fm_flags=",
args.fm_start, args.fm_length);
printflags64(fiemap_flags, args.fm_flags,
"FIEMAP_FLAG_???");
tprintf(", fm_extent_count=%u}", args.fm_extent_count);
return 0;
}
tprints("{fm_flags=");
printflags64(fiemap_flags, args.fm_flags,
"FIEMAP_FLAG_???");
tprintf(", fm_mapped_extents=%u",
args.fm_mapped_extents);
if (abbrev(tcp)) {
tprints(", ...");
} else {
struct fiemap_extent fe;
tprints(", fm_extents=");
print_array(tcp,
arg + offsetof(typeof(args), fm_extents),
args.fm_mapped_extents, &fe, sizeof(fe),
tfetch_mem,
print_fiemap_extent, 0);
}
tprints("}");
break;
}
#endif /* HAVE_LINUX_FIEMAP_H */
default:
return RVAL_DECODED;
};
return RVAL_IOCTL_DECODED;
}
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