/*
* Copyright (c) 2012 The Chromium OS Authors.
+ * Copyright (c) 2012-2017 The strace developers.
* Written by Mike Frysinger <vapier@gentoo.org>.
*
* Redistribution and use in source and binary forms, with or without
*/
#include "defs.h"
+#include <linux/ioctl.h>
+#include <linux/loop.h>
-#include <sys/ioctl.h>
+typedef struct loop_info struct_loop_info;
-#include <linux/loop.h>
+#include DEF_MPERS_TYPE(struct_loop_info)
+
+#include MPERS_DEFS
+#include "print_fields.h"
+#include "xlat/loop_cmds.h"
#include "xlat/loop_flags_options.h"
#include "xlat/loop_crypt_type_options.h"
-int
-loop_ioctl(struct tcb *tcp, const unsigned int code, long arg)
+static void
+decode_loop_info(struct tcb *const tcp, const kernel_ulong_t addr)
{
- struct loop_info info;
- struct loop_info64 info64;
- char *s = alloca((LO_NAME_SIZE + LO_KEY_SIZE) * 4);
+ struct_loop_info info;
- if (entering(tcp))
- return 0;
+ tprints(", ");
+ if (umove_or_printaddr(tcp, addr, &info))
+ return;
- switch (code) {
+ tprintf("{lo_number=%d", info.lo_number);
- case LOOP_SET_STATUS:
- case LOOP_GET_STATUS:
- if (!verbose(tcp) || umove(tcp, arg, &info) < 0)
- return 0;
+ if (!abbrev(tcp)) {
+ PRINT_FIELD_DEV(", ", info, lo_device);
+ tprintf(", lo_inode=%" PRI_klu, (kernel_ulong_t) info.lo_inode);
+ PRINT_FIELD_DEV(", ", info, lo_rdevice);
+ }
- tprintf(", {number=%d", info.lo_number);
+ tprintf(", lo_offset=%#x", info.lo_offset);
+
+ if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
+ tprints(", lo_encrypt_type=");
+ printxval(loop_crypt_type_options, info.lo_encrypt_type,
+ "LO_CRYPT_???");
+ /*
+ * It is converted to unsigned before use in kernel, see
+ * loop_info64_from_old in drivers/block/loop.c
+ */
+ tprintf(", lo_encrypt_key_size=%" PRIu32,
+ (uint32_t) info.lo_encrypt_key_size);
+ }
- if (!abbrev(tcp)) {
- tprintf(", device=%#lx, inode=%lu, rdevice=%#lx",
- (unsigned long) info.lo_device,
- info.lo_inode,
- (unsigned long) info.lo_rdevice);
- }
+ tprints(", lo_flags=");
+ printflags(loop_flags_options, info.lo_flags, "LO_FLAGS_???");
- tprintf(", offset=%#x", info.lo_offset);
+ PRINT_FIELD_CSTRING(", ", info, lo_name);
- if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
- tprints(", encrypt_type=");
- printxval(loop_crypt_type_options, info.lo_encrypt_type,
- "LO_CRYPT_???");
- tprintf(", encrypt_key_size=%d", info.lo_encrypt_key_size);
- }
+ if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
+ const unsigned int lo_encrypt_key_size =
+ MIN((unsigned) info.lo_encrypt_key_size, LO_KEY_SIZE);
+ PRINT_FIELD_STRING(", ", info, lo_encrypt_key,
+ lo_encrypt_key_size, 0);
+ }
- tprints(", flags=");
- printflags(loop_flags_options, info.lo_flags, "LO_FLAGS_???");
+ if (!abbrev(tcp))
+ tprintf(", lo_init=[%#" PRI_klx ", %#" PRI_klx "]"
+ ", reserved=[%#hhx, %#hhx, %#hhx, %#hhx]}",
+ (kernel_ulong_t) info.lo_init[0],
+ (kernel_ulong_t) info.lo_init[1],
+ info.reserved[0], info.reserved[1],
+ info.reserved[2], info.reserved[3]);
+ else
+ tprints(", ...}");
+}
- string_quote(info.lo_name, s, -1, LO_NAME_SIZE);
- tprintf(", name=%s", s);
+static void
+decode_loop_info64(struct tcb *const tcp, const kernel_ulong_t addr)
+{
+ struct loop_info64 info64;
- if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
- string_quote((void *) info.lo_encrypt_key, s, 0, LO_KEY_SIZE);
- tprintf(", encrypt_key=%s", s);
- }
+ tprints(", ");
+ if (umove_or_printaddr(tcp, addr, &info64))
+ return;
+
+ if (!abbrev(tcp)) {
+ PRINT_FIELD_DEV("{", info64, lo_device);
+ tprintf(", lo_inode=%" PRIu64, (uint64_t) info64.lo_inode);
+ PRINT_FIELD_DEV(", ", info64, lo_rdevice);
+ tprintf(", lo_offset=%#" PRIx64 ", lo_sizelimit=%" PRIu64
+ ", lo_number=%" PRIu32,
+ (uint64_t) info64.lo_offset,
+ (uint64_t) info64.lo_sizelimit,
+ (uint32_t) info64.lo_number);
+ } else {
+ tprintf("{lo_offset=%#" PRIx64 ", lo_number=%" PRIu32,
+ (uint64_t) info64.lo_offset,
+ (uint32_t) info64.lo_number);
+ }
- if (!abbrev(tcp))
- tprintf(", init={%#lx, %#lx}"
- ", reserved={%#x, %#x, %#x, %#x}}",
- info.lo_init[0], info.lo_init[1],
- info.reserved[0], info.reserved[1],
- info.reserved[2], info.reserved[3]);
- else
- tprints(", ...}");
+ if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
+ tprints(", lo_encrypt_type=");
+ printxval(loop_crypt_type_options, info64.lo_encrypt_type,
+ "LO_CRYPT_???");
+ tprintf(", lo_encrypt_key_size=%" PRIu32,
+ info64.lo_encrypt_key_size);
+ }
- return 1;
+ tprints(", lo_flags=");
+ printflags(loop_flags_options, info64.lo_flags, "LO_FLAGS_???");
- case LOOP_SET_STATUS64:
- case LOOP_GET_STATUS64:
- if (!verbose(tcp) || umove(tcp, arg, &info64) < 0)
+ PRINT_FIELD_CSTRING(", ", info64, lo_file_name);
+
+ if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
+ PRINT_FIELD_CSTRING(", ", info64, lo_crypt_name);
+ const unsigned int lo_encrypt_key_size =
+ MIN((unsigned) info64.lo_encrypt_key_size, LO_KEY_SIZE);
+ PRINT_FIELD_STRING(", ", info64, lo_encrypt_key,
+ lo_encrypt_key_size, 0);
+ }
+
+ if (!abbrev(tcp))
+ tprintf(", lo_init=[%#" PRIx64 ", %#" PRIx64 "]}",
+ (uint64_t) info64.lo_init[0],
+ (uint64_t) info64.lo_init[1]);
+ else
+ tprints(", ...}");
+}
+
+MPERS_PRINTER_DECL(int, loop_ioctl,
+ struct tcb *tcp, const unsigned int code,
+ const kernel_ulong_t arg)
+{
+ switch (code) {
+ case LOOP_GET_STATUS:
+ if (entering(tcp))
return 0;
+ /* fall through */
+ case LOOP_SET_STATUS:
+ decode_loop_info(tcp, arg);
+ break;
- tprints(", {");
-
- if (!abbrev(tcp)) {
- tprintf("device=%" PRIu64 ", inode=%" PRIu64 ", "
- "rdevice=%" PRIu64 ", offset=%#" PRIx64 ", "
- "sizelimit=%" PRIu64 ", number=%" PRIu32,
- (uint64_t) info64.lo_device,
- (uint64_t) info64.lo_inode,
- (uint64_t) info64.lo_rdevice,
- (uint64_t) info64.lo_offset,
- (uint64_t) info64.lo_sizelimit,
- (uint32_t) info64.lo_number);
- } else {
- tprintf("offset=%#" PRIx64 ", number=%" PRIu32,
- (uint64_t) info64.lo_offset,
- (uint32_t) info64.lo_number);
- }
-
- if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
- tprints(", encrypt_type=");
- printxval(loop_crypt_type_options, info64.lo_encrypt_type,
- "LO_CRYPT_???");
- tprintf(", encrypt_key_size=%" PRIu32,
- info64.lo_encrypt_key_size);
- }
-
- tprints(", flags=");
- printflags(loop_flags_options, info64.lo_flags, "LO_FLAGS_???");
-
- string_quote((void *) info64.lo_file_name, s, -1, LO_NAME_SIZE);
- tprintf(", file_name=%s", s);
-
- if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
- string_quote((void *) info64.lo_crypt_name, s, -1, LO_NAME_SIZE);
- tprintf(", crypt_name=%s", s);
- string_quote((void *) info64.lo_encrypt_key, s, 0, LO_KEY_SIZE);
- tprintf(", encrypt_key=%s", s);
- }
-
- if (!abbrev(tcp))
- tprintf(", init={%#" PRIx64 ", %#" PRIx64 "}}",
- (uint64_t) info64.lo_init[0],
- (uint64_t) info64.lo_init[1]);
- else
- tprints(", ...}");
-
- return 1;
+ case LOOP_GET_STATUS64:
+ if (entering(tcp))
+ return 0;
+ /* fall through */
+ case LOOP_SET_STATUS64:
+ decode_loop_info64(tcp, arg);
+ break;
case LOOP_CLR_FD:
-#ifdef LOOP_SET_CAPACITY
case LOOP_SET_CAPACITY:
-#endif
-#ifdef LOOP_CTL_GET_FREE
/* newer loop-control stuff */
case LOOP_CTL_GET_FREE:
-#endif
/* Takes no arguments */
- return 1;
+ break;
case LOOP_SET_FD:
case LOOP_CHANGE_FD:
-#ifdef LOOP_CTL_ADD
+ tprints(", ");
+ printfd(tcp, arg);
+ break;
+
/* newer loop-control stuff */
case LOOP_CTL_ADD:
case LOOP_CTL_REMOVE:
-#endif
- /* These take simple args, so let default printer handle it */
+ tprintf(", %d", (int) arg);
+ break;
+
+ case LOOP_SET_DIRECT_IO:
+ tprintf(", %" PRI_klu, arg);
+ break;
default:
- return 0;
+ return RVAL_DECODED;
}
+
+ return RVAL_DECODED | 1;
}
projects / strace / blobdiff