File hdparm-trim-limit.patch of Package hdparm

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File hdparm-trim-limit.patch of Package hdparm

Index: hdparm-9.27/hdparm.c
===================================================================
--- hdparm-9.27.orig/hdparm.c
+++ hdparm-9.27/hdparm.c
@@ -1154,22 +1154,61 @@ static void do_trim_sector_ranges (int f
 	exit(err);
 }
 
+static void
+extract_id_string (__u16 *idw, int words, char *dst)
+{
+	char *e;
+	int i, max = words * 2;
+
+	for (i = 0; i < words; ++i) {
+		__u16 w = idw[i];
+		w = (__u16)(__be16)(w);
+		dst[i*2  ] = w >> 8;
+		dst[i*2+1] = w;
+	}
+	dst[max] = '\0';
+	for (e = dst + max; --e != dst;) {
+		if (*e && *e != ' ')
+			break;
+		*e = '\0';
+	}
+}
+
+static int
+get_trim_dev_limit (void *id)
+{
+	__u16 *idw = id;
+	char model[41];
+
+	if (idw[105] && idw[105] != 0xffff)
+		return idw[105];
+	extract_id_string(idw + 27, 20, model);
+	if (0 == strcmp(model, "OCZ VERTEX-LE"))
+		return 8;
+	if (0 == strcmp(model, "OCZ-VERTEX"))
+		return 64;
+	return 1;  /* all other drives, including Intel SSDs */
+}
+
 static int
 do_trim_from_stdin (int fd, const char *devname, void *id)
 {
 	__u64 *data, range, nsectors = 0, lba_limit;
 	unsigned int max_kb, data_sects, data_bytes;
-	unsigned int total_ranges = 0, nranges = 0, max_ranges;
+	unsigned int total_ranges = 0, nranges = 0, max_ranges, dev_limit;
 	int err = 0;
 
 	id = get_identify_data(fd, id);
 	lba_limit = id ? get_lba_capacity(id) : (1ULL << 48) - 1;
+	dev_limit = get_trim_dev_limit(id);
 
 	err = sysfs_get_attr(fd, "queue/max_sectors_kb", "%u", &max_kb, NULL, 0);
 	if (err || max_kb == 0)
 		data_sects = 128;	/* "safe" default for most hardware */
 	else
 		data_sects = max_kb * 2;
+	if (data_sects > dev_limit)
+		data_sects = dev_limit;
 	data_bytes = data_sects * 512;
 
 	data = mmap(NULL, data_bytes, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
@@ -1178,6 +1217,7 @@ do_trim_from_stdin (int fd, const char *
 		perror("mmap(MAP_ANONYMOUS)");
 		exit(err);
 	}
+	memset(data, 0, data_bytes);
 	max_ranges = data_bytes / sizeof(range);
 
 	do {
@@ -1201,6 +1241,7 @@ do_trim_from_stdin (int fd, const char *
 			data[nranges++] = __cpu_to_le64(range);
 			if (nranges == max_ranges) {
 				err = trim_sectors(fd, devname, nranges, data, nsectors);
+				memset(data, 0, data_bytes);
 				nranges = 0;
 				nsectors = 0;
 			}
Index: hdparm-9.27/identify.c
===================================================================
--- hdparm-9.27.orig/identify.c
+++ hdparm-9.27/identify.c
@@ -1101,7 +1101,8 @@ void identify (__u16 *id_supplied)
 		sdma_ok = 0;  /* word 62 has been re-purposed for non-sdma mode reporting */
 		printf("\tDMADIR bit required in PACKET commands\n");
 	} else {
-		__u8 w62 = val[62], hi = w62 >> 8, lo = w62;
+		__u16 w62 = val[62];
+		__u8 hi = w62 >> 8, lo = w62;
 		if (!w62 || (lo & 0xf8))
 			sdma_ok = 0;
 		else if (hi && hi != 1 && hi != 2 && hi != 4)
@@ -1210,7 +1211,11 @@ void identify (__u16 *id_supplied)
 		__u16 word69 = val[69] & ~(trimz | trimd); /* TRIM bits require special interpretation */
 		print_features(word69, word69, feat_word69_str);
 		if (val[169] & 1 && val[169] != 0xffff) { /* supports TRIM ? */
-			printf("\t   *\tData Set Management TRIM supported\n");
+			printf("\t   *\tData Set Management TRIM supported");
+			if (val[105] && val[105] != 0xffff)
+				printf(" (limit %u block%s)\n", val[105], val[105] > 1 ? "s" : "");
+			else
+				printf(" (limit unknown)\n");
 			if (val[69] & trimd) { /* Deterministic TRIM support */
 				if (val[69] & trimz)
 					print_features(trimz, trimz, feat_word69_str);

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File hdparm-trim-limit.patch of Package hdparm

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