e2fsprogs: blkid: Add Flash-Friendly File System (f2fs) supportcm-11.0-XNPH05Q-tomato-9828f8e9cccm-11.0-XNPH05Q-bacon-5229c4ef56stable/cm-11.0-XNG3Cstable/cm-11.0-XNG2Sstable/cm-11.0-XNF9Xstable/cm-11.0-XNF8Ystable/cm-11.0shipping/cm-11.0

Backported from mainline util-linux

Change-Id: I3afb543ed027786ee20c3e7c9093ff7f5af54a04

3 files changed, 132 insertions, 0 deletions

diff --git a/lib/blkid/Android.mk b/lib/blkid/Android.mk
index 209da822..2aeb375c 100644
--- a/lib/blkid/Android.mk
+++ b/lib/blkid/Android.mk
@@ -9,6 +9,7 @@ libext2_blkid_src_files := \
 	llseek.c \
 	probe.c \
 	probe_exfat.c \
+	probe_f2fs.c \
 	read.c \
 	resolve.c \
 	save.c \
diff --git a/lib/blkid/probe.c b/lib/blkid/probe.c
index cd8ada63..cdeea5d3 100644
--- a/lib/blkid/probe.c
+++ b/lib/blkid/probe.c
@@ -40,6 +40,10 @@ extern int probe_exfat(struct blkid_probe *probe,
 		      struct blkid_magic *id __BLKID_ATTR((unused)),
 		      unsigned char *buf);
 
+extern int probe_f2fs(struct blkid_probe *probe,
+		      struct blkid_magic *id __BLKID_ATTR((unused)),
+		      unsigned char *buf);
+
 static int figure_label_len(const unsigned char *label, int len)
 {
 	const unsigned char *end = label + len - 1;
@@ -1492,6 +1496,7 @@ static struct blkid_magic type_array[] = {
   { "lvm2pv",	 1,  0x018,  8, "LVM2 001",		probe_lvm2 },
   { "lvm2pv",	 1,  0x218,  8, "LVM2 001",		probe_lvm2 },
   { "btrfs",	 64,  0x40,  8, "_BHRfS_M",		probe_btrfs },
+  { "f2fs",	 1,	 0,  4, "\x10\x20\xF5\xF2",	probe_f2fs },
   {   NULL,	 0,	 0,  0, NULL,			NULL }
 };
 
diff --git a/lib/blkid/probe_f2fs.c b/lib/blkid/probe_f2fs.c
new file mode 100644
index 00000000..9cfc64d9
--- /dev/null
+++ b/lib/blkid/probe_f2fs.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2013 Alejandro Martinez Ruiz <alex@nowcomputing.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License
+ *
+ * Initial Android port
+ * March 2014 Ketut P. Kumajaya <ketut.kumajaya@gmail.com>
+ */
+
+#include <stddef.h>
+#include <string.h>
+
+#include "blkidP.h"
+#include "uuid/uuid.h"
+#include "probe.h"
+
+#define le16_to_cpu(x) blkid_le16(x)
+
+typedef __u8  uint8_t;
+typedef __u16 uint16_t;
+typedef __u32 uint32_t;
+typedef __u64 uint64_t;
+
+typedef struct blkid_probe* blkid_probe;
+
+#define F2FS_UUID_SIZE		16
+#define F2FS_LABEL_SIZE		512
+
+struct f2fs_super_block {				/* According to version 1.1 */
+/* 0x00 */	__u32	magic;				/* Magic Number */
+/* 0x04 */	__u16	major_ver;			/* Major Version */
+/* 0x06 */	__u16	minor_ver;			/* Minor Version */
+/* 0x08 */	__u32	log_sectorsize;			/* log2 sector size in bytes */
+/* 0x0C */	__u32	log_sectors_per_block;		/* log2 # of sectors per block */
+/* 0x10 */	__u32	log_blocksize;			/* log2 block size in bytes */
+/* 0x14 */	__u32	log_blocks_per_seg;		/* log2 # of blocks per segment */
+/* 0x18 */	__u32	segs_per_sec;			/* # of segments per section */
+/* 0x1C */	__u32	secs_per_zone;			/* # of sections per zone */
+/* 0x20 */	__u32	checksum_offset;		/* checksum offset inside super block */
+/* 0x24 */	__u64	block_count;			/* total # of user blocks */
+/* 0x2C */	__u32	section_count;			/* total # of sections */
+/* 0x30 */	__u32	segment_count;			/* total # of segments */
+/* 0x34 */	__u32	segment_count_ckpt;		/* # of segments for checkpoint */
+/* 0x38 */	__u32	segment_count_sit;		/* # of segments for SIT */
+/* 0x3C */	__u32	segment_count_nat;		/* # of segments for NAT */
+/* 0x40 */	__u32	segment_count_ssa;		/* # of segments for SSA */
+/* 0x44 */	__u32	segment_count_main;		/* # of segments for main area */
+/* 0x48 */	__u32	segment0_blkaddr;		/* start block address of segment 0 */
+/* 0x4C */	__u32	cp_blkaddr;			/* start block address of checkpoint */
+/* 0x50 */	__u32	sit_blkaddr;			/* start block address of SIT */
+/* 0x54 */	__u32	nat_blkaddr;			/* start block address of NAT */
+/* 0x58 */	__u32	ssa_blkaddr;			/* start block address of SSA */
+/* 0x5C */	__u32	main_blkaddr;			/* start block address of main area */
+/* 0x60 */	__u32	root_ino;			/* root inode number */
+/* 0x64 */	__u32	node_ino;			/* node inode number */
+/* 0x68 */	__u32	meta_ino;			/* meta inode number */
+/* 0x6C */	__u8	uuid[F2FS_UUID_SIZE];		/* 128-bit uuid for volume */
+/* 0x7C */	__u16	volume_name[F2FS_LABEL_SIZE];	/* volume name */
+#if 0
+/* 0x47C */	__u32	extension_count;		/* # of extensions below */
+/* 0x480 */	__u8	extension_list[64][8];		/* extension array */
+#endif
+} __attribute__((packed));
+
+static void unicode_16le_to_utf8(unsigned char *str, int out_len,
+				 const unsigned char *buf, int in_len)
+{
+	int i, j;
+	unsigned int c;
+
+	for (i = j = 0; i + 2 <= in_len; i += 2) {
+		c = (buf[i+1] << 8) | buf[i];
+		if (c == 0) {
+			str[j] = '\0';
+			break;
+		} else if (c < 0x80) {
+			if (j+1 >= out_len)
+				break;
+			str[j++] = (unsigned char) c;
+		} else if (c < 0x800) {
+			if (j+2 >= out_len)
+				break;
+			str[j++] = (unsigned char) (0xc0 | (c >> 6));
+			str[j++] = (unsigned char) (0x80 | (c & 0x3f));
+		} else {
+			if (j+3 >= out_len)
+				break;
+			str[j++] = (unsigned char) (0xe0 | (c >> 12));
+			str[j++] = (unsigned char) (0x80 | ((c >> 6) & 0x3f));
+			str[j++] = (unsigned char) (0x80 | (c & 0x3f));
+		}
+	}
+	str[j] = '\0';
+}
+
+int probe_f2fs(struct blkid_probe *probe,
+		      struct blkid_magic *id __BLKID_ATTR((unused)),
+		      unsigned char *buf)
+{
+	struct f2fs_super_block *sb;
+	uint16_t major, minor;
+	char uuid_str[37];
+
+	sb = (struct f2fs_super_block *) buf;
+	if (!sb)
+		return -1;
+
+	major = le16_to_cpu(sb->major_ver);
+	minor = le16_to_cpu(sb->minor_ver);
+
+	/* For version 1.0 we cannot know the correct sb structure */
+	if (major == 1 && minor == 0)
+		return 0;
+
+	if (*((unsigned char *) sb->volume_name)) {
+		unsigned char utf8_label[512];
+		unicode_16le_to_utf8(utf8_label, sizeof(utf8_label),
+			(unsigned char *) sb->volume_name, sizeof(sb->volume_name));
+		blkid_set_tag(probe->dev, "LABEL", utf8_label, 0);
+	}
+
+	uuid_unparse(sb->uuid, uuid_str);
+	blkid_set_tag(probe->dev, "UUID", uuid_str, sizeof(uuid_str));
+	return 0;
+}