40771886ec
As the former allows controlling presence of xlat definitions during the inclusion and not header generation. * xlat/loop_cmds.in: Remove #stop. * loop.c: Wrap "xlat/loop_cmds.h" inclusion in XLAT_MACROS_ONLY. * tests/ioctl_loop.c: Likewise.
186 lines
4.5 KiB
C
186 lines
4.5 KiB
C
/*
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* Copyright (c) 2012 The Chromium OS Authors.
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* Copyright (c) 2012-2018 The strace developers.
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* Written by Mike Frysinger <vapier@gentoo.org>.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#include "defs.h"
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#include <linux/ioctl.h>
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#include <linux/loop.h>
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typedef struct loop_info struct_loop_info;
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#include DEF_MPERS_TYPE(struct_loop_info)
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#include MPERS_DEFS
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#include "print_fields.h"
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#define XLAT_MACROS_ONLY
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# include "xlat/loop_cmds.h"
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#undef XLAT_MACROS_ONLY
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#include "xlat/loop_flags_options.h"
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#include "xlat/loop_crypt_type_options.h"
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static void
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decode_loop_info(struct tcb *const tcp, const kernel_ulong_t addr)
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{
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struct_loop_info info;
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tprints(", ");
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if (umove_or_printaddr(tcp, addr, &info))
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return;
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tprintf("{lo_number=%d", info.lo_number);
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if (!abbrev(tcp)) {
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PRINT_FIELD_DEV(", ", info, lo_device);
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tprintf(", lo_inode=%" PRI_klu, (kernel_ulong_t) info.lo_inode);
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PRINT_FIELD_DEV(", ", info, lo_rdevice);
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}
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tprintf(", lo_offset=%#x", info.lo_offset);
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if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
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tprints(", lo_encrypt_type=");
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printxval(loop_crypt_type_options, info.lo_encrypt_type,
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"LO_CRYPT_???");
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/*
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* It is converted to unsigned before use in kernel, see
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* loop_info64_from_old in drivers/block/loop.c
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*/
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tprintf(", lo_encrypt_key_size=%" PRIu32,
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(uint32_t) info.lo_encrypt_key_size);
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}
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tprints(", lo_flags=");
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printflags(loop_flags_options, info.lo_flags, "LO_FLAGS_???");
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PRINT_FIELD_CSTRING(", ", info, lo_name);
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if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
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const unsigned int lo_encrypt_key_size =
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MIN((unsigned) info.lo_encrypt_key_size, LO_KEY_SIZE);
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PRINT_FIELD_STRING(", ", info, lo_encrypt_key,
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lo_encrypt_key_size, 0);
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}
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if (!abbrev(tcp))
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tprintf(", lo_init=[%#" PRI_klx ", %#" PRI_klx "]"
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", reserved=[%#hhx, %#hhx, %#hhx, %#hhx]}",
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(kernel_ulong_t) info.lo_init[0],
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(kernel_ulong_t) info.lo_init[1],
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info.reserved[0], info.reserved[1],
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info.reserved[2], info.reserved[3]);
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else
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tprints(", ...}");
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}
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static void
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decode_loop_info64(struct tcb *const tcp, const kernel_ulong_t addr)
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{
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struct loop_info64 info64;
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tprints(", ");
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if (umove_or_printaddr(tcp, addr, &info64))
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return;
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if (!abbrev(tcp)) {
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PRINT_FIELD_DEV("{", info64, lo_device);
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tprintf(", lo_inode=%" PRIu64, (uint64_t) info64.lo_inode);
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PRINT_FIELD_DEV(", ", info64, lo_rdevice);
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tprintf(", lo_offset=%#" PRIx64 ", lo_sizelimit=%" PRIu64
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", lo_number=%" PRIu32,
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(uint64_t) info64.lo_offset,
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(uint64_t) info64.lo_sizelimit,
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(uint32_t) info64.lo_number);
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} else {
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tprintf("{lo_offset=%#" PRIx64 ", lo_number=%" PRIu32,
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(uint64_t) info64.lo_offset,
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(uint32_t) info64.lo_number);
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}
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if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
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tprints(", lo_encrypt_type=");
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printxval(loop_crypt_type_options, info64.lo_encrypt_type,
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"LO_CRYPT_???");
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tprintf(", lo_encrypt_key_size=%" PRIu32,
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info64.lo_encrypt_key_size);
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}
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tprints(", lo_flags=");
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printflags(loop_flags_options, info64.lo_flags, "LO_FLAGS_???");
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PRINT_FIELD_CSTRING(", ", info64, lo_file_name);
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if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
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PRINT_FIELD_CSTRING(", ", info64, lo_crypt_name);
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const unsigned int lo_encrypt_key_size =
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MIN((unsigned) info64.lo_encrypt_key_size, LO_KEY_SIZE);
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PRINT_FIELD_STRING(", ", info64, lo_encrypt_key,
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lo_encrypt_key_size, 0);
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}
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if (!abbrev(tcp))
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tprintf(", lo_init=[%#" PRIx64 ", %#" PRIx64 "]}",
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(uint64_t) info64.lo_init[0],
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(uint64_t) info64.lo_init[1]);
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else
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tprints(", ...}");
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}
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MPERS_PRINTER_DECL(int, loop_ioctl,
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struct tcb *tcp, const unsigned int code,
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const kernel_ulong_t arg)
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{
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switch (code) {
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case LOOP_GET_STATUS:
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if (entering(tcp))
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return 0;
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ATTRIBUTE_FALLTHROUGH;
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case LOOP_SET_STATUS:
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decode_loop_info(tcp, arg);
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break;
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case LOOP_GET_STATUS64:
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if (entering(tcp))
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return 0;
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ATTRIBUTE_FALLTHROUGH;
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case LOOP_SET_STATUS64:
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decode_loop_info64(tcp, arg);
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break;
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case LOOP_CLR_FD:
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case LOOP_SET_CAPACITY:
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/* newer loop-control stuff */
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case LOOP_CTL_GET_FREE:
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/* Takes no arguments */
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break;
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case LOOP_SET_FD:
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case LOOP_CHANGE_FD:
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tprints(", ");
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printfd(tcp, arg);
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break;
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/* newer loop-control stuff */
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case LOOP_CTL_ADD:
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case LOOP_CTL_REMOVE:
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tprintf(", %d", (int) arg);
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break;
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case LOOP_SET_DIRECT_IO:
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case LOOP_SET_BLOCK_SIZE:
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tprintf(", %" PRI_klu, arg);
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break;
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default:
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return RVAL_DECODED;
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}
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return RVAL_IOCTL_DECODED;
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}
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