blob: 21cf0f1811f1b9e7fcf42b3ee160a76dbcd92e6f [file] [log] [blame]
/*
* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
* 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"
#ifndef MAX_HANDLE_SZ
# define MAX_HANDLE_SZ 128
#endif
typedef struct {
unsigned int handle_bytes;
int handle_type;
} file_handle_header;
SYS_FUNC(name_to_handle_at)
{
file_handle_header h;
const long addr = tcp->u_arg[2];
if (entering(tcp)) {
/* dirfd */
print_dirfd(tcp, tcp->u_arg[0]);
/* pathname */
printpath(tcp, tcp->u_arg[1]);
tprints(", ");
/* handle */
if (umove_or_printaddr(tcp, addr, &h)) {
tprints(", ");
/* mount_id */
printaddr(tcp->u_arg[3]);
tprints(", ");
/* flags */
printflags(at_flags, tcp->u_arg[4], "AT_???");
return RVAL_DECODED;
}
tprintf("{handle_bytes=%u", h.handle_bytes);
set_tcb_priv_ulong(tcp, h.handle_bytes);
return 0;
} else {
unsigned int i = get_tcb_priv_ulong(tcp);
if ((!syserror(tcp) || EOVERFLOW == tcp->u_error)
&& !umove(tcp, addr, &h)) {
unsigned char f_handle[MAX_HANDLE_SZ];
if (i != h.handle_bytes)
tprintf(" => %u", h.handle_bytes);
if (!syserror(tcp)) {
tprintf(", handle_type=%d", h.handle_type);
if (h.handle_bytes > MAX_HANDLE_SZ)
h.handle_bytes = MAX_HANDLE_SZ;
if (!umoven(tcp, addr + sizeof(h), h.handle_bytes,
f_handle)) {
tprints(", f_handle=0x");
for (i = 0; i < h.handle_bytes; ++i)
tprintf("%02x", f_handle[i]);
}
}
}
tprints("}, ");
/* mount_id */
printnum_int(tcp, tcp->u_arg[3], "%d");
tprints(", ");
/* flags */
printflags(at_flags, tcp->u_arg[4], "AT_???");
}
return 0;
}
SYS_FUNC(open_by_handle_at)
{
file_handle_header h;
const long addr = tcp->u_arg[1];
/* mount_fd */
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
/* handle */
if (!umove_or_printaddr(tcp, addr, &h)) {
unsigned char f_handle[MAX_HANDLE_SZ];
tprintf("{handle_bytes=%u, handle_type=%d",
h.handle_bytes, h.handle_type);
if (h.handle_bytes > MAX_HANDLE_SZ)
h.handle_bytes = MAX_HANDLE_SZ;
if (!umoven(tcp, addr + sizeof(h), h.handle_bytes, &f_handle)) {
unsigned int i;
tprints(", f_handle=0x");
for (i = 0; i < h.handle_bytes; ++i)
tprintf("%02x", f_handle[i]);
}
tprints("}");
}
tprints(", ");
/* flags */
tprint_open_modes(tcp->u_arg[2]);
return RVAL_DECODED;
}