Upstream-Status: Pending

This patch is made by xin.zhong@intel.com to implement these supported 
features in mkfs.btrfs:
  * populate fs image from a directory while creating it
  * reduce minimum size of the created image from 256MB to around 24MB
  * while creating image use the specified device name rather than output.img 

Patch tested and incorporated in poky by:
Nitin A Kamble <nitin.a.kamble@intel.com> 2011/06/20

diff --git a/file-item.c b/file-item.c
index 9732282..aed42c3 100644
--- a/file-item.c
+++ b/file-item.c
@@ -193,7 +193,7 @@ int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
 			  struct btrfs_root *root, u64 alloc_end,
 			  u64 bytenr, char *data, size_t len)
 {
-	int ret;
+	int ret = 0;
 	struct btrfs_key file_key;
 	struct btrfs_key found_key;
 	u64 next_offset = (u64)-1;
diff --git a/mkfs.c b/mkfs.c
index 57c88f9..e953a33 100644
--- a/mkfs.c
+++ b/mkfs.c
@@ -36,7 +36,7 @@
 #include <uuid/uuid.h>
 #include <linux/fs.h>
 #include <ctype.h>
-#include <attr/xattr.h>
+#include <sys/xattr.h>
 #include "kerncompat.h"
 #include "ctree.h"
 #include "disk-io.h"
@@ -517,7 +517,6 @@ static int add_inode_items(struct btrfs_trans_handle *trans,
 fail:
 	return ret;
 }
-
 static int add_xattr_item(struct btrfs_trans_handle *trans,
 			  struct btrfs_root *root, u64 objectid,
 			  const char *file_name)
@@ -532,8 +531,10 @@ static int add_xattr_item(struct btrfs_trans_handle *trans,
 
 	ret = llistxattr(file_name, xattr_list, XATTR_LIST_MAX);
 	if (ret < 0) {
-		fprintf(stderr, "get a list of xattr failed for %s\n",
-			file_name);
+		if(errno == ENOTSUP)
+			return 0;
+		fprintf(stderr, "get a list of xattr failed for %s errno %d\n",
+				file_name, errno);
 		return ret;
 	}
 	if (ret == 0)
@@ -546,8 +547,11 @@ static int add_xattr_item(struct btrfs_trans_handle *trans,
 
 		ret = getxattr(file_name, cur_name, cur_value, XATTR_SIZE_MAX);
 		if (ret < 0) {
-			fprintf(stderr, "get a xattr value failed for %s\n",
-				cur_name);
+			if(errno == ENOTSUP)
+				return 0;
+			fprintf(stderr, "get a xattr value failed for %s attr %s errno %d\n",
+				file_name, cur_name, errno);
+			return ret;
 		}
 
 		ret = btrfs_insert_xattr_item(trans, root, cur_name,
@@ -563,7 +567,6 @@ static int add_xattr_item(struct btrfs_trans_handle *trans,
 
 	return ret;
 }
-
 static int custom_alloc_extent(struct btrfs_root *root, u64 num_bytes,
 			       u64 hint_byte, struct btrfs_key *ins)
 {
@@ -923,27 +926,27 @@ static int traverse_directory(struct btrfs_trans_handle *trans,
 				fprintf(stderr, "add_inode_items failed\n");
 				goto fail;
 			}
-
 			ret = add_xattr_item(trans, root,
 					     cur_inum, cur_file->d_name);
 			if (ret) {
 				fprintf(stderr, "add_xattr_item failed\n");
-				goto fail;
+				if(ret != -ENOTSUP)
+					goto fail;
 			}
-
 			if (S_ISDIR(st.st_mode)) {
 				dir_entry = malloc(sizeof(struct directory_name_entry));
 				dir_entry->dir_name = cur_file->d_name;
 				dir_entry->path = make_path(parent_dir_entry->path,
 							    cur_file->d_name);
 				dir_entry->inum = cur_inum;
-				list_add_tail(&dir_entry->list,	&dir_head->list);
+				list_add_tail(&dir_entry->list, &dir_head->list);
 			} else if (S_ISREG(st.st_mode)) {
 				ret = add_file_items(trans, root, &cur_inode,
 						     cur_inum, parent_inum, &st,
 						     cur_file->d_name, out_fd);
 				if (ret) {
-					fprintf(stderr, "add_file_items failed\n");
+					fprintf(stderr, "add_file_items failed %s\n",
+						cur_file->d_name);
 					goto fail;
 				}
 			} else if (S_ISLNK(st.st_mode)) {
@@ -987,7 +990,7 @@ static int create_chunks(struct btrfs_trans_handle *trans,
 	u64 chunk_size;
 	u64 meta_type = BTRFS_BLOCK_GROUP_METADATA;
 	u64 data_type = BTRFS_BLOCK_GROUP_DATA;
-	u64 minimum_data_chunk_size = 64 * 1024 * 1024;
+	u64 minimum_data_chunk_size = 8 * 1024 * 1024;
 	u64 i;
 	int ret;
 
@@ -1062,7 +1065,6 @@ static u64 size_sourcedir(char *dir_name, u64 sectorsize,
 	char path[512];
 	char *file_name = "temp_file";
 	FILE *file;
-	u64 minimum_data_size = 256 * 1024 * 1024;	/* 256MB */
 	u64 default_chunk_size = 8 * 1024 * 1024;	/* 8MB */
 	u64 allocated_meta_size = 8 * 1024 * 1024;	/* 8MB */
 	u64 allocated_total_size = 20 * 1024 * 1024;	/* 20MB */
@@ -1101,9 +1103,6 @@ static u64 size_sourcedir(char *dir_name, u64 sectorsize,
 
 	*num_of_meta_chunks_ret = num_of_meta_chunks;
 
-	if (total_size < minimum_data_size)
-		total_size = minimum_data_size;
-
 	return total_size;
 }
 
@@ -1158,9 +1157,9 @@ int main(int ac, char **av)
 
 	char *source_dir = NULL;
 	int source_dir_set = 0;
-	char *output = "output.img";
 	u64 num_of_meta_chunks = 0;
 	u64 size_of_data = 0;
+	u64 source_dir_size = 0;
 
 	while(1) {
 		int c;
@@ -1224,8 +1223,6 @@ int main(int ac, char **av)
 		fprintf(stderr, "Illegal nodesize %u\n", nodesize);
 		exit(1);
 	}
-	if (source_dir_set)
-		ac++;
 	ac = ac - optind;
 	if (ac == 0)
 		print_usage();
@@ -1257,17 +1254,19 @@ int main(int ac, char **av)
 			block_count = dev_block_count;
 	} else {
 		ac = 0;
-		fd = open_target(output);
+		file = av[optind++];
+		fd = open_target(file);
 		if (fd < 0) {
 			fprintf(stderr, "unable to open the %s\n", file);
 			exit(1);
 		}
 
-		file = output;
 		first_fd = fd;
 		first_file = file;
-		block_count = size_sourcedir(source_dir, sectorsize,
+		source_dir_size = size_sourcedir(source_dir, sectorsize,
 					     &num_of_meta_chunks, &size_of_data);
+		if(block_count < source_dir_size)
+			block_count = source_dir_size;
 		ret = zero_output_file(fd, block_count, sectorsize);
 		if (ret) {
 			fprintf(stderr, "unable to zero the output file\n");
