Decode mtd ioctls

I got tired of figuring out mtd structures (which show up a lot
in the embedded space), so add decoders for those ioctls.

* defs.h (mtd_ioctl): New prototype.
(print_loff_t): Likewise.
* io.c (print_loff_t): Delete static keyword
* ioctl.c (ioctl_decode): Call mtd_ioctl when code is 'M'.
* Makefile.am (strace_SOURCES): Add mtd.c.
(EXTRA_DIST): Add linux/mtd-abi.h.
* mtd.c: New file.
* linux/mtd-abi.h: New file.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 282 insertions, 0 deletions

diff --git a/mtd.c b/mtd.c
new file mode 100644
index 0000000..976024e
--- /dev/null
+++ b/mtd.c
@@ -0,0 +1,282 @@
+/*
+ * Copyright (c) 2012 Mike Frysinger <vapier@gentoo.org>
+ *
+ * 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 <sys/ioctl.h>
+
+/* The mtd api changes quickly, so we have to keep a local copy */
+#include <linux/version.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0)
+# include "mtd-abi.h"
+#else
+# include <mtd/mtd-abi.h>
+#endif
+
+static const struct xlat mtd_mode_options[] = {
+	{ MTD_OPS_PLACE_OOB,	"MTD_OPS_PLACE_OOB"	},
+	{ MTD_OPS_AUTO_OOB,	"MTD_OPS_AUTO_OOB"	},
+	{ MTD_OPS_RAW,		"MTD_OPS_RAW"		},
+	{ 0,			NULL			},
+};
+
+static const struct xlat mtd_type_options[] = {
+	{ MTD_ABSENT,		"MTD_ABSENT"		},
+	{ MTD_RAM,		"MTD_RAM"		},
+	{ MTD_ROM,		"MTD_ROM"		},
+	{ MTD_NORFLASH,		"MTD_NORFLASH"		},
+	{ MTD_NANDFLASH,	"MTD_NANDFLASH"		},
+	{ MTD_DATAFLASH,	"MTD_DATAFLASH"		},
+	{ MTD_UBIVOLUME,	"MTD_UBIVOLUME"		},
+	{ MTD_MLCNANDFLASH,	"MTD_MLCNANDFLASH"	},
+	{ 0,			NULL			},
+};
+
+static const struct xlat mtd_flags_options[] = {
+	{ MTD_WRITEABLE,	"MTD_WRITEABLE"		},
+	{ MTD_BIT_WRITEABLE,	"MTD_BIT_WRITEABLE"	},
+	{ MTD_NO_ERASE,		"MTD_NO_ERASE"		},
+	{ MTD_POWERUP_LOCK,	"MTD_POWERUP_LOCK"	},
+	{ 0,			NULL			},
+};
+
+static const struct xlat mtd_otp_options[] = {
+	{ MTD_OTP_OFF,		"MTD_OTP_OFF"		},
+	{ MTD_OTP_FACTORY,	"MTD_OTP_FACTORY"	},
+	{ MTD_OTP_USER,		"MTD_OTP_USER"		},
+	{ 0,			NULL			},
+};
+
+static const struct xlat mtd_nandecc_options[] = {
+	{ MTD_NANDECC_OFF,		"MTD_NANDECC_OFF"		},
+	{ MTD_NANDECC_PLACE,		"MTD_NANDECC_PLACE"		},
+	{ MTD_NANDECC_AUTOPLACE,	"MTD_NANDECC_AUTOPLACE"		},
+	{ MTD_NANDECC_PLACEONLY,	"MTD_NANDECC_PLACEONLY"		},
+	{ MTD_NANDECC_AUTOPL_USR,	"MTD_NANDECC_AUTOPL_USR"	},
+	{ 0,				NULL				},
+};
+
+int mtd_ioctl(struct tcb *tcp, long code, long arg)
+{
+	struct mtd_info_user minfo;
+	struct erase_info_user einfo;
+	struct erase_info_user64 einfo64;
+	struct mtd_oob_buf mbuf;
+	struct mtd_oob_buf64 mbuf64;
+	struct region_info_user rinfo;
+	struct otp_info oinfo;
+	struct mtd_ecc_stats estat;
+	struct mtd_write_req mreq;
+	struct nand_oobinfo ninfo;
+	struct nand_ecclayout_user nlay;
+	int i, j;
+
+	if (entering(tcp))
+		return 0;
+
+	switch (code) {
+
+	case MEMGETINFO:
+		if (!verbose(tcp) || umove(tcp, arg, &minfo) < 0)
+			return 0;
+
+		tprints(", {type=");
+		printxval(mtd_type_options, minfo.type, "MTD_???");
+		tprints(", flags=");
+		printflags(mtd_flags_options, minfo.flags, "MTD_???");
+		tprintf(", size=%#" PRIx32 ", erasesize=%#" PRIx32,
+			minfo.size, minfo.erasesize);
+		tprintf(", writesize=%#" PRIx32 ", oobsize=%#" PRIx32,
+			minfo.writesize, minfo.oobsize);
+		tprintf(", padding=%#" PRIx64 "}",
+			(uint64_t) minfo.padding);
+		return 1;
+
+	case MEMERASE:
+	case MEMLOCK:
+	case MEMUNLOCK:
+	case MEMISLOCKED:
+		if (!verbose(tcp) || umove(tcp, arg, &einfo) < 0)
+			return 0;
+
+		tprintf(", {start=%#" PRIx32 ", length=%#" PRIx32 "}",
+			einfo.start, einfo.length);
+		return 1;
+
+	case MEMERASE64:
+		if (!verbose(tcp) || umove(tcp, arg, &einfo64) < 0)
+			return 0;
+
+		tprintf(", {start=%#" PRIx64 ", length=%#" PRIx64 "}",
+			(uint64_t) einfo64.start, (uint64_t) einfo64.length);
+		return 1;
+
+	case MEMWRITEOOB:
+	case MEMREADOOB:
+		if (!verbose(tcp) || umove(tcp, arg, &mbuf) < 0)
+			return 0;
+
+		tprintf(", {start=%#" PRIx32 ", length=%#" PRIx32 ", ptr=...}",
+			mbuf.start, mbuf.length);
+		return 1;
+
+	case MEMWRITEOOB64:
+	case MEMREADOOB64:
+		if (!verbose(tcp) || umove(tcp, arg, &mbuf64) < 0)
+			return 0;
+
+		tprintf(", {start=%#" PRIx64 ", length=%#" PRIx64 ", ptr=...}",
+			(uint64_t) mbuf64.start, (uint64_t) mbuf64.length);
+		return 1;
+
+	case MEMGETREGIONINFO:
+		if (!verbose(tcp) || umove(tcp, arg, &rinfo) < 0)
+			return 0;
+
+		tprintf(", {offset=%#" PRIx32 ", erasesize=%#" PRIx32,
+			rinfo.offset, rinfo.erasesize);
+		tprintf(", numblocks=%#" PRIx32 ", regionindex=%#" PRIx32 "}",
+			rinfo.numblocks, rinfo.regionindex);
+		return 1;
+
+	case MEMGETOOBSEL:
+		if (!verbose(tcp) || umove(tcp, arg, &ninfo) < 0)
+			return 0;
+
+		tprints(", {useecc=");
+		printxval(mtd_nandecc_options, ninfo.useecc, "MTD_NANDECC_???");
+		tprintf(", eccbytes=%#" PRIx32, ninfo.eccbytes);
+
+		tprints(", oobfree={");
+		for (i = 0; i < ARRAY_SIZE(ninfo.oobfree); ++i) {
+			if (i)
+				tprints("}, ");
+			tprints("{");
+			for (j = 0; j < ARRAY_SIZE(ninfo.oobfree[0]); ++j) {
+				if (j)
+					tprints(", ");
+				tprintf("%#" PRIx32, ninfo.oobfree[i][j]);
+			}
+		}
+
+		tprints("}}, eccpos={");
+		for (i = 0; i < ARRAY_SIZE(ninfo.eccpos); ++i) {
+			if (i)
+				tprints(", ");
+			tprintf("%#" PRIx32, ninfo.eccpos[i]);
+		}
+
+		tprints("}");
+		return 1;
+
+	case OTPGETREGIONINFO:
+	case OTPLOCK:
+		if (!verbose(tcp) || umove(tcp, arg, &oinfo) < 0)
+			return 0;
+
+		tprintf(", {start=%#" PRIx32 ", length=%#" PRIx32 ", locked=%" PRIu32 "}",
+			oinfo.start, oinfo.length, oinfo.locked);
+		return 1;
+
+	case ECCGETLAYOUT:
+		if (!verbose(tcp) || umove(tcp, arg, &nlay) < 0)
+			return 0;
+
+		tprintf(", {eccbytes=%#" PRIx32 ", eccpos={", nlay.eccbytes);
+		for (i = 0; i < ARRAY_SIZE(nlay.eccpos); ++i) {
+			if (i)
+				tprints(", ");
+			tprintf("%#" PRIx32, nlay.eccpos[i]);
+		}
+		tprintf("}, oobavail=%#" PRIx32 ", oobfree={", nlay.oobavail);
+		for (i = 0; i < ARRAY_SIZE(nlay.oobfree); ++i) {
+			if (i)
+				tprints(", ");
+			tprintf("{offset=%#" PRIx32 ", length=%#" PRIx32 "}",
+				nlay.oobfree[i].offset, nlay.oobfree[i].length);
+		}
+		tprints("}");
+		return 1;
+
+	case ECCGETSTATS:
+		if (!verbose(tcp) || umove(tcp, arg, &estat) < 0)
+			return 0;
+
+		tprintf(", {corrected=%#" PRIx32 ", failed=%#" PRIx32,
+			estat.corrected, estat.failed);
+		tprintf(", badblocks=%#" PRIx32 ", bbtblocks=%#" PRIx32 "}",
+			estat.badblocks, estat.bbtblocks);
+		return 1;
+
+	case MEMWRITE:
+		if (!verbose(tcp) || umove(tcp, arg, &mreq) < 0)
+			return 0;
+
+		tprintf(", {start=%#" PRIx64 ", len=%#" PRIx64,
+			(uint64_t) mreq.start, (uint64_t) mreq.len);
+		tprintf(", ooblen=%#" PRIx64 ", usr_data=%#" PRIx64,
+			(uint64_t) mreq.ooblen, (uint64_t) mreq.usr_data);
+		tprintf(", usr_oob=%#" PRIx64 ", mode=",
+			(uint64_t) mreq.usr_oob);
+		printxval(mtd_mode_options, mreq.mode, "MTD_OPS_???");
+		tprints(", padding=...}");
+		return 1;
+
+	case OTPSELECT:
+		if (!verbose(tcp) || umove(tcp, arg, &i) < 0)
+			return 0;
+
+		tprints(", [");
+		printxval(mtd_otp_options, i, "MTD_OTP_???");
+		tprints("]");
+		return 1;
+
+	case MEMGETBADBLOCK:
+	case MEMSETBADBLOCK:
+		if (!verbose(tcp))
+			return 0;
+
+		tprints(", ");
+		print_loff_t(tcp, arg);
+		return 1;
+
+	case OTPGETREGIONCOUNT:
+		if (!verbose(tcp) || umove(tcp, arg, &i) < 0)
+			return 0;
+
+		tprintf(", [%i]", i);
+		return 1;
+
+	case MTDFILEMODE:
+		/* XXX: process return value as enum mtd_file_modes */
+
+	case MEMGETREGIONCOUNT:
+		/* These ones take simple args, so let default printer handle it */
+
+	default:
+		return 0;
+	}
+}