From: Jeff Mahoney <jeffm@suse.com>
Date: Wed, 18 May 2016 22:09:40 +0000 (-0400)
Subject: ioctl: add decoding for FS_IOC_FIEMAP
X-Git-Tag: v4.12~98
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=398fe0493ee0da44fecd98d0c72fab3627060953;p=strace

ioctl: add decoding for FS_IOC_FIEMAP

* file_ioctl.c: Include <linux/fiemap.h>, "xlat/fiemap_flags.h",
and "xlat/fiemap_extent_flags.h".
(file_ioctl): Handle FS_IOC_FIEMAP.
* ioctl.c (ioctl_decode): Use file_ioctl for decoding 'f' code ioctls.
---

diff --git a/file_ioctl.c b/file_ioctl.c
index 3a735dc4..c803576e 100644
--- a/file_ioctl.c
+++ b/file_ioctl.c
@@ -28,6 +28,11 @@
 #include "defs.h"
 #include <sys/ioctl.h>
 #include <linux/fs.h>
+#include <linux/fiemap.h>
+
+#include "xlat/fiemap_flags.h"
+#include "xlat/fiemap_extent_flags.h"
+
 #ifndef FICLONE
 #define FICLONE         _IOW(0x94, 9, int)
 #endif
@@ -154,6 +159,69 @@ file_ioctl(struct tcb *tcp, const unsigned int code, const long arg)
 		break;
 	}
 
+	case FS_IOC_FIEMAP: {
+		struct fiemap args;
+		struct fiemap_extent fe;
+		unsigned int i;
+
+		if (entering(tcp))
+			tprints(", ");
+		else if (syserror(tcp))
+			break;
+		else
+			tprints(" => ");
+
+		if (umove_or_printaddr(tcp, arg, &args))
+			break;
+
+		if (entering(tcp)) {
+			tprintf("{fm_start=%" PRI__u64 ", "
+				"fm_length=%" PRI__u64 ", "
+				"fm_flags=",
+				args.fm_start, args.fm_length);
+			printflags64(fiemap_flags, args.fm_flags,
+				     "FIEMAP_FLAG_???");
+			tprintf(", fm_extent_count=%u}", args.fm_extent_count);
+			return 0;
+		}
+
+		tprints("{fm_flags=");
+		printflags64(fiemap_flags, args.fm_flags,
+			     "FIEMAP_FLAG_???");
+		tprintf(", fm_mapped_extents=%u",
+			args.fm_mapped_extents);
+		tprints(", fm_extents=");
+		if (abbrev(tcp)) {
+			tprints("...}");
+			break;
+		}
+
+		tprints("[");
+		for (i = 0; i < args.fm_mapped_extents; i++) {
+			unsigned long offset;
+			offset = offsetof(typeof(args), fm_extents[i]);
+			if (i)
+				tprints(", ");
+
+			if (i > max_strlen ||
+			    umoven(tcp, arg + offset, sizeof(fe), &fe)) {
+				tprints("...");
+				break;
+			}
+
+			tprintf("{fe_logical=%" PRI__u64
+				", fe_physical=%" PRI__u64
+				", fe_length=%" PRI__u64 ", ",
+				fe.fe_logical, fe.fe_physical, fe.fe_length);
+
+			printflags64(fiemap_extent_flags, fe.fe_flags,
+				     "FIEMAP_EXTENT_???");
+			tprints("}");
+		}
+		tprints("]}");
+		break;
+	}
+
 	default:
 		return RVAL_DECODED;
 	};
diff --git a/ioctl.c b/ioctl.c
index d82af4b9..f6ca2f0a 100644
--- a/ioctl.c
+++ b/ioctl.c
@@ -228,11 +228,20 @@ ioctl_decode(struct tcb *tcp)
 {
 	const unsigned int code = tcp->u_arg[1];
 	const long arg = tcp->u_arg[2];
+	int ret;
 
 	switch (_IOC_TYPE(code)) {
 #if defined(ALPHA) || defined(POWERPC)
-	case 'f': case 't': case 'T':
+	case 'f':
+		ret = file_ioctl(tcp, code, arg);
+		if (ret != RVAL_DECODED)
+			return ret;
+	case 't'
+	case 'T':
+		return term_ioctl(tcp, code, arg);
 #else /* !ALPHA */
+	case 'f':
+		return file_ioctl(tcp, code, arg);
 	case 0x54:
 #endif /* !ALPHA */
 		return term_ioctl(tcp, code, arg);