[PATCH] strace: Add support for block ioctls
Jeff Mahoney
jeffm at suse.com
Mon Nov 30 20:41:07 UTC 2009
This patch adds support for blkdev_ioctl()-handled ioctls.
Signed-off-by: Jeff Mahoney <jeffm at suse.com>
---
Makefile.am | 2
block.c | 221 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
defs.h | 1
ioctl.c | 3
linux/ioctlent.sh | 3
5 files changed, 229 insertions(+), 1 deletion(-)
--- a/Makefile.am
+++ b/Makefile.am
@@ -15,7 +15,7 @@ INCLUDES = -I$(OS)/$(ARCH) -I$(srcdir)/$
strace_SOURCES = strace.c syscall.c count.c util.c desc.c file.c ipc.c \
io.c ioctl.c mem.c net.c process.c bjm.c quota.c \
resource.c signal.c sock.c system.c term.c time.c \
- proc.c scsi.c stream.c
+ proc.c scsi.c stream.c block.c
noinst_HEADERS = defs.h
EXTRA_DIST = $(man_MANS) errnoent.sh signalent.sh syscallent.sh ioctlsort.c \
--- /dev/null
+++ b/block.c
@@ -0,0 +1,221 @@
+#include "defs.h"
+#ifdef LINUX
+#include <stdint.h>
+#include <linux/blkpg.h>
+#include <linux/fs.h>
+#include <linux/hdreg.h>
+#include <linux/blktrace_api.h>
+
+#ifndef BLKALIGNOFF
+#define BLKALIGNOFF _IO(0x12,122)
+#endif
+#ifndef BLKPBSZGET
+#define BLKPBSZGET _IO(0x12,123)
+#endif
+#ifndef BLKIOMIN
+#define BLKIOMIN _IO(0x12,120)
+#endif
+#ifndef BLKIOOPT
+#define BLKIOOPT _IO(0x12,121)
+#endif
+
+
+static void
+print_blkpg_req(struct tcb *tcp, struct blkpg_ioctl_arg *blkpg)
+{
+ struct blkpg_partition p;
+ if (!(blkpg->op == BLKPG_ADD_PARTITION ||
+ blkpg->op == BLKPG_DEL_PARTITION)) {
+ tprintf("{%d, <invalid>", blkpg->op);
+ return;
+ }
+
+ tprintf("{%s, ", blkpg->op == BLKPG_ADD_PARTITION ?
+ "BLKPG_ADD_PARTITION" : "BLKPG_DEL_PARTITION");
+ tprintf("flags=%d, datalen=%d, ", blkpg->flags, blkpg->datalen);
+
+ if (umove(tcp, (unsigned long)blkpg->data, &p) < 0) {
+ tprintf("%#lx", (unsigned long)blkpg->data);
+ return;
+ }
+
+ tprintf("{start=%lld, length=%lld, pno=%d, ",
+ p.start, p.length, p.pno);
+
+ tprintf("devname=\"%s\", volname=\"%s\"}",
+ p.devname, p.volname);
+}
+
+int
+block_ioctl(struct tcb *tcp, long code, long arg)
+{
+ switch (code) {
+
+ /* These pass arg as a value, not a pointer */
+ case BLKRASET:
+ case BLKFRASET:
+ if (entering(tcp))
+ tprintf(", %ld", arg);
+ break;
+
+ /* Just pass in a signed int */
+ case BLKROSET:
+ case BLKBSZSET:
+ if (entering(tcp)) {
+ int int_val;
+ if (umove(tcp, arg, &int_val) < 0)
+ tprintf(", %#lx", arg);
+ else
+ tprintf(", %d", int_val);
+ }
+ break;
+
+ /* Just return an unsigned short */
+ case BLKSECTGET:
+ if (exiting(tcp)) {
+ unsigned short ushort_val;
+ if (umove(tcp, arg, &ushort_val) < 0)
+ tprintf(", %#lx", arg);
+ else
+ tprintf(", %hu", ushort_val);
+ }
+ break;
+
+ /* Just return a signed int */
+ case BLKROGET:
+ case BLKBSZGET:
+ case BLKSSZGET:
+ case BLKALIGNOFF:
+ if (exiting(tcp)) {
+ int int_val;
+ if (umove(tcp, arg, &int_val) < 0)
+ tprintf(", %#lx", arg);
+ else
+ tprintf(", %d", int_val);
+ }
+ break;
+
+ /* Just return an unsigned int */
+ case BLKPBSZGET:
+ case BLKIOMIN:
+ case BLKIOOPT:
+ if (exiting(tcp)) {
+ unsigned int uint_val;
+ if (umove(tcp, arg, &uint_val) < 0)
+ tprintf(", %#lx", arg);
+ else
+ tprintf(", %u", uint_val);
+ }
+ break;
+
+ /* Just return a signed long */
+ case BLKRAGET:
+ case BLKFRAGET:
+ if (exiting(tcp)) {
+ long size;
+ if (umove(tcp, arg, &size) < 0)
+ tprintf(", %#lx", arg);
+ else
+ tprintf(", %ld", size);
+ }
+ break;
+
+ /* Just return an unsigned long */
+ case BLKGETSIZE:
+ if (exiting(tcp)) {
+ unsigned long ulong_val;
+ if (umove(tcp, arg, &ulong_val) < 0)
+ tprintf(", %#lx", arg);
+ else
+ tprintf(", %lu", ulong_val);
+ }
+ break;
+
+ /* Just return a quad */
+ case BLKGETSIZE64:
+ if (exiting(tcp)) {
+ uint64_t uint64_val;
+ if (umove(tcp, arg, &uint64_val) < 0)
+ tprintf(", %#lx", arg);
+ else
+ tprintf(", %llu", (unsigned long long)uint64_val);
+ }
+ break;
+
+ /* More complex types */
+ case BLKDISCARD:
+ if (entering(tcp)) {
+ uint64_t range[2];
+ if (umove(tcp, arg, range) < 0)
+ tprintf(", %#lx", arg);
+ else
+ tprintf(", {%llx, %llx}",
+ (unsigned long long)range[0],
+ (unsigned long long)range[1]);
+ }
+ break;
+
+ case HDIO_GETGEO:
+ if (exiting(tcp)) {
+ struct hd_geometry geo;
+ if (umove(tcp, arg, &geo) < 0)
+ tprintf(", %#lx", arg);
+ else
+ tprintf(", {heads=%hhu, sectors=%hhu, "
+ "cylinders=%hu, start=%lu}",
+ geo.heads, geo.sectors,
+ geo.cylinders, geo.start);
+ }
+ break;
+ case BLKPG:
+ if (entering(tcp)) {
+ struct blkpg_ioctl_arg blkpg;
+ if (umove(tcp, arg, &blkpg) < 0)
+ tprintf(", %#lx", arg);
+ else {
+ tprintf(", ");
+ print_blkpg_req(tcp, &blkpg);
+ }
+ }
+ if (exiting(tcp)) {
+ tprintf("}");
+ }
+ break;
+ case BLKTRACESETUP:
+ if (entering(tcp)) {
+ struct blk_user_trace_setup buts;
+ if (umove(tcp, arg, &buts) < 0)
+ tprintf(", %#lx", arg);
+ else {
+ tprintf(", {act_mask=%hu, buf_size=%u, ",
+ buts.act_mask, buts.buf_size);
+ tprintf("buf_nr=%u, start_lba=%llu, ",
+ buts.buf_nr, buts.start_lba);
+ tprintf("end_lba=%llu, pid=%u}",
+ buts.end_lba, buts.pid);
+ }
+ }
+ if (exiting(tcp)) {
+ struct blk_user_trace_setup buts;
+ if (umove(tcp, arg, &buts) < 0)
+ tprintf(", %#lx", arg);
+ else {
+ tprintf(", {name=\"%s\"}", buts.name);
+ }
+ }
+ break;
+ /* No arguments or unhandled */
+ case BLKFLSBUF: /* Requires driver knowlege */
+ case BLKRRPART: /* No args */
+ case BLKTRACESTART:
+ case BLKTRACESTOP:
+ case BLKTRACETEARDOWN:
+ default:
+ if (entering(tcp))
+ tprintf(", %#lx", arg);
+ break;
+
+ };
+ return 1;
+}
+#endif /* LINUX */
--- a/defs.h
+++ b/defs.h
@@ -526,6 +526,7 @@ extern int stream_ioctl P((struct tcb *,
#ifdef LINUX
extern int rtc_ioctl P((struct tcb *, long, long));
extern int scsi_ioctl P((struct tcb *, long, long));
+extern int block_ioctl P((struct tcb *, long, long));
#endif
extern void tv_tv P((struct timeval *, int, int));
--- a/ioctl.c
+++ b/ioctl.c
@@ -152,6 +152,9 @@ long code, arg;
#ifdef LINUX
case 'p':
return rtc_ioctl(tcp, code, arg);
+ case 0x03:
+ case 0x12:
+ return block_ioctl(tcp, code, arg);
case 0x22:
return scsi_ioctl(tcp, code, arg);
#endif
--- a/linux/ioctlent.sh
+++ b/linux/ioctlent.sh
@@ -67,6 +67,9 @@ lookup_ioctls 56 linux/vt.h
lookup_ioctls '7[12]' linux/videotext.h
lookup_ioctls 89 $asm/sockios.h linux/sockios.h
lookup_ioctls 8B linux/wireless.h
+lookup_ioctls 03 linux/hdreg.h
+lookup_ioctls fd dm-ioctl.h
+lookup_ioctls 52 linux/rfkill.h
files="linux/* $asm/* scsi/* sound/*"
--
Jeff Mahoney
SUSE Labs
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