YAFFS2 import

Direct import of yaffs as a tarball as of 20071113 from their public
CVS-web at http://www.aleph1.co.uk/cgi-bin/viewcvs.cgi/yaffs2/

The code can also be imported on the command line with:
export CVSROOT=:pserver:anonymous@cvs.aleph1.co.uk:/home/aleph1/cvs cvs logon
(Hit return when asked for a password)
cvs checkout yaffs2

Signed-off-by: William Juul <william.juul@tandberg.com>
Signed-off-by: Stig Olsen <stig.olsen@tandberg.com>

1 files changed, 590 insertions, 0 deletions

diff --git a/fs/yaffs2/utils/mkyaffsimage.c b/fs/yaffs2/utils/mkyaffsimage.c
new file mode 100644
index 0000000..2b8dc1e
--- /dev/null
+++ b/fs/yaffs2/utils/mkyaffsimage.c
@@ -0,0 +1,590 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2007 Aleph One Ltd.
+ *   for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ * Nick Bane modifications flagged NCB
+ * Endian handling patches by James Ng
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * makeyaffsimage.c 
+ *
+ * Makes a YAFFS file system image that can be used to load up a file system.
+ */
+ 
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <string.h>
+#include <unistd.h>
+#include "yaffs_ecc.h"
+#include "yaffs_guts.h"
+
+
+#define MAX_OBJECTS 10000
+
+const char * mkyaffsimage_c_version = "$Id: mkyaffsimage.c,v 1.7 2003/07/16 03:00:48 charles Exp $";
+
+
+typedef struct
+{
+	dev_t dev;
+	ino_t ino;
+	int   obj;
+} objItem;
+
+
+static objItem obj_list[MAX_OBJECTS];
+static int n_obj = 0;
+static int obj_id = YAFFS_NOBJECT_BUCKETS + 1;
+
+static int nObjects, nDirectories, nPages;
+
+static int outFile;
+
+static int error;
+
+static int convert_endian = 0;
+
+static int obj_compare(const void *a, const void * b)
+{
+  objItem *oa, *ob;
+  
+  oa = (objItem *)a;
+  ob = (objItem *)b;
+  
+  if(oa->dev < ob->dev) return -1;
+  if(oa->dev > ob->dev) return 1;
+  if(oa->ino < ob->ino) return -1;
+  if(oa->ino > ob->ino) return 1;
+  
+  return 0;
+}
+
+
+static void add_obj_to_list(dev_t dev, ino_t ino, int obj)
+{
+	if(n_obj < MAX_OBJECTS)
+	{
+		obj_list[n_obj].dev = dev;
+		obj_list[n_obj].ino = ino;
+		obj_list[n_obj].obj = obj;
+		n_obj++;
+		qsort(obj_list,n_obj,sizeof(objItem),obj_compare);
+		
+	}
+	else
+	{
+		// oops! not enough space in the object array
+		fprintf(stderr,"Not enough space in object array\n");
+		exit(2);
+	}
+}
+
+
+static int find_obj_in_list(dev_t dev, ino_t ino)
+{
+	objItem *i = NULL;
+	objItem test;
+
+	test.dev = dev;
+	test.ino = ino;
+	
+	if(n_obj > 0)
+	{
+		i = bsearch(&test,obj_list,n_obj,sizeof(objItem),obj_compare);
+	}
+
+	if(i)
+	{
+		return i->obj;
+	}
+	return -1;
+}
+
+// NCB added 10/9/2002
+static __u16 yaffs_CalcNameSum(const char *name)
+{
+	__u16 sum = 0;
+	__u16 i = 1;
+	
+	__u8 *bname = (__u8 *)name;
+	
+	while (*bname)
+	{
+		sum += (*bname) * i;
+		i++;
+		bname++;
+	}
+	return sum;
+}
+
+
+static void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare)
+{
+	yaffs_ECCCalculate(data , spare->ecc1);
+	yaffs_ECCCalculate(&data[256] , spare->ecc2);
+}
+
+static void yaffs_CalcTagsECC(yaffs_Tags *tags)
+{
+	// Todo don't do anything yet. Need to calculate ecc
+	unsigned char *b = ((yaffs_TagsUnion *)tags)->asBytes;
+	unsigned  i,j;
+	unsigned  ecc = 0;
+	unsigned bit = 0;
+
+    // Clear ECC fields
+    if (!convert_endian)
+    {
+	    tags->ecc = 0;
+    }
+    else
+    {
+        // Because we're in "munged tag" mode, we have to clear it manually
+        b[6] &= 0xC0;
+        b[7] &= 0x03;
+    }
+	
+	for(i = 0; i < 8; i++)
+	{
+// NCB modified 20-9-02		for(j = 1; j &0x7f; j<<=1)
+		for(j = 1; j &0xff; j<<=1)
+		{
+			bit++;
+			if(b[i] & j)
+			{
+				ecc ^= bit;
+			}
+		}
+	}
+	
+	// Write out ECC
+    if (!convert_endian)
+    {
+        tags->ecc = ecc;
+    }
+    else
+    {
+	    // We have to munge the ECC again.
+	    b[6] |= ((ecc >> 6) & 0x3F);
+        b[7] |= ((ecc & 0x3F) << 2);
+    }
+}
+static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, yaffs_Tags *tagsPtr)
+{
+	yaffs_TagsUnion *tu = (yaffs_TagsUnion *)tagsPtr;
+	
+	//yaffs_CalcTagsECC(tagsPtr);
+	
+	sparePtr->tagByte0 = tu->asBytes[0];
+	sparePtr->tagByte1 = tu->asBytes[1];
+	sparePtr->tagByte2 = tu->asBytes[2];
+	sparePtr->tagByte3 = tu->asBytes[3];
+	sparePtr->tagByte4 = tu->asBytes[4];
+	sparePtr->tagByte5 = tu->asBytes[5];
+	sparePtr->tagByte6 = tu->asBytes[6];
+	sparePtr->tagByte7 = tu->asBytes[7];
+}
+
+/* This little function converts a little endian tag to a big endian tag.
+ * NOTE: The tag is not usable after this other than calculating the CRC
+ * with.
+ */
+static void little_to_big_endian(yaffs_Tags *tagsPtr)
+{
+    yaffs_TagsUnion * tags = (yaffs_TagsUnion* )tagsPtr; // Work in bytes.
+    yaffs_TagsUnion   temp;
+
+    memset(&temp, 0, sizeof(temp));
+    // Ick, I hate magic numbers.
+    temp.asBytes[0] = ((tags->asBytes[2] & 0x0F) << 4) | ((tags->asBytes[1] & 0xF0) >> 4);
+    temp.asBytes[1] = ((tags->asBytes[1] & 0x0F) << 4) | ((tags->asBytes[0] & 0xF0) >> 4);
+    temp.asBytes[2] = ((tags->asBytes[0] & 0x0F) << 4) | ((tags->asBytes[2] & 0x30) >> 2) | ((tags->asBytes[3] & 0xC0) >> 6);
+    temp.asBytes[3] = ((tags->asBytes[3] & 0x3F) << 2) | ((tags->asBytes[2] & 0xC0) >> 6);
+    temp.asBytes[4] = ((tags->asBytes[6] & 0x03) << 6) | ((tags->asBytes[5] & 0xFC) >> 2);
+    temp.asBytes[5] = ((tags->asBytes[5] & 0x03) << 6) | ((tags->asBytes[4] & 0xFC) >> 2);
+    temp.asBytes[6] = ((tags->asBytes[4] & 0x03) << 6) | (tags->asBytes[7] & 0x3F);
+    temp.asBytes[7] = (tags->asBytes[6] & 0xFC) | ((tags->asBytes[7] & 0xC0) >> 6);
+
+    // Now copy it back.
+    tags->asBytes[0] = temp.asBytes[0];
+    tags->asBytes[1] = temp.asBytes[1];
+    tags->asBytes[2] = temp.asBytes[2];
+    tags->asBytes[3] = temp.asBytes[3];
+    tags->asBytes[4] = temp.asBytes[4];
+    tags->asBytes[5] = temp.asBytes[5];
+    tags->asBytes[6] = temp.asBytes[6];
+    tags->asBytes[7] = temp.asBytes[7];
+}
+
+static int write_chunk(__u8 *data, __u32 objId, __u32 chunkId, __u32 nBytes)
+{
+	yaffs_Tags t;
+	yaffs_Spare s;
+
+	error = write(outFile,data,512);
+	if(error < 0) return error;
+
+	memset(&t,0xff,sizeof (yaffs_Tags));
+	memset(&s,0xff,sizeof (yaffs_Spare));
+	
+	t.chunkId = chunkId;
+	t.serialNumber = 0;
+	t.byteCount = nBytes;
+	t.objectId = objId;
+
+    if (convert_endian)
+    {
+        little_to_big_endian(&t);
+    }
+	
+	yaffs_CalcTagsECC(&t);
+	yaffs_LoadTagsIntoSpare(&s,&t);
+	yaffs_CalcECC(data,&s);
+	
+	nPages++;
+	
+	return write(outFile,&s,sizeof(yaffs_Spare));
+	
+}
+
+#define SWAP32(x)   ((((x) & 0x000000FF) << 24) | \
+                     (((x) & 0x0000FF00) << 8 ) | \
+                     (((x) & 0x00FF0000) >> 8 ) | \
+                     (((x) & 0xFF000000) >> 24))
+
+#define SWAP16(x)   ((((x) & 0x00FF) << 8) | \
+                     (((x) & 0xFF00) >> 8))
+        
+// This one is easier, since the types are more standard. No funky shifts here.
+static void object_header_little_to_big_endian(yaffs_ObjectHeader* oh)
+{
+    oh->type = SWAP32(oh->type); // GCC makes enums 32 bits.
+    oh->parentObjectId = SWAP32(oh->parentObjectId); // int
+    oh->sum__NoLongerUsed = SWAP16(oh->sum__NoLongerUsed); // __u16 - Not used, but done for completeness.
+    // name = skip. Char array. Not swapped.
+    oh->yst_mode = SWAP32(oh->yst_mode);
+#ifdef CONFIG_YAFFS_WINCE // WinCE doesn't implement this, but we need to just in case. 
+    // In fact, WinCE would be *THE* place where this would be an issue!
+    oh->notForWinCE[0] = SWAP32(oh->notForWinCE[0]);
+    oh->notForWinCE[1] = SWAP32(oh->notForWinCE[1]);
+    oh->notForWinCE[2] = SWAP32(oh->notForWinCE[2]);
+    oh->notForWinCE[3] = SWAP32(oh->notForWinCE[3]);
+    oh->notForWinCE[4] = SWAP32(oh->notForWinCE[4]);
+#else
+    // Regular POSIX.
+    oh->yst_uid = SWAP32(oh->yst_uid);
+    oh->yst_gid = SWAP32(oh->yst_gid);
+    oh->yst_atime = SWAP32(oh->yst_atime);
+    oh->yst_mtime = SWAP32(oh->yst_mtime);
+    oh->yst_ctime = SWAP32(oh->yst_ctime);
+#endif
+
+    oh->fileSize = SWAP32(oh->fileSize); // Aiee. An int... signed, at that!
+    oh->equivalentObjectId = SWAP32(oh->equivalentObjectId);
+    // alias  - char array.
+    oh->yst_rdev = SWAP32(oh->yst_rdev);
+
+#ifdef CONFIG_YAFFS_WINCE
+    oh->win_ctime[0] = SWAP32(oh->win_ctime[0]);
+    oh->win_ctime[1] = SWAP32(oh->win_ctime[1]);
+    oh->win_atime[0] = SWAP32(oh->win_atime[0]);
+    oh->win_atime[1] = SWAP32(oh->win_atime[1]);
+    oh->win_mtime[0] = SWAP32(oh->win_mtime[0]);
+    oh->win_mtime[1] = SWAP32(oh->win_mtime[1]);
+    oh->roomToGrow[0] = SWAP32(oh->roomToGrow[0]);
+    oh->roomToGrow[1] = SWAP32(oh->roomToGrow[1]);
+    oh->roomToGrow[2] = SWAP32(oh->roomToGrow[2]);
+    oh->roomToGrow[3] = SWAP32(oh->roomToGrow[3]);
+    oh->roomToGrow[4] = SWAP32(oh->roomToGrow[4]);
+    oh->roomToGrow[5] = SWAP32(oh->roomToGrow[5]);
+#else
+    oh->roomToGrow[0] = SWAP32(oh->roomToGrow[0]);
+    oh->roomToGrow[1] = SWAP32(oh->roomToGrow[1]);
+    oh->roomToGrow[2] = SWAP32(oh->roomToGrow[2]);
+    oh->roomToGrow[3] = SWAP32(oh->roomToGrow[3]);
+    oh->roomToGrow[4] = SWAP32(oh->roomToGrow[4]);
+    oh->roomToGrow[5] = SWAP32(oh->roomToGrow[5]);
+    oh->roomToGrow[6] = SWAP32(oh->roomToGrow[6]);
+    oh->roomToGrow[7] = SWAP32(oh->roomToGrow[7]);
+    oh->roomToGrow[8] = SWAP32(oh->roomToGrow[8]);
+    oh->roomToGrow[9] = SWAP32(oh->roomToGrow[9]);
+    oh->roomToGrow[10] = SWAP32(oh->roomToGrow[10]);
+    oh->roomToGrow[11] = SWAP32(oh->roomToGrow[11]);
+#endif
+}
+
+static int write_object_header(int objId, yaffs_ObjectType t, struct stat *s, int parent, const char *name, int equivalentObj, const char * alias)
+{
+	__u8 bytes[512];
+	
+	
+	yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *)bytes;
+	
+	memset(bytes,0xff,512);
+	
+	oh->type = t;
+
+	oh->parentObjectId = parent;
+	
+	strncpy(oh->name,name,YAFFS_MAX_NAME_LENGTH);
+	
+	
+	if(t != YAFFS_OBJECT_TYPE_HARDLINK)
+	{
+		oh->yst_mode = s->st_mode;
+		oh->yst_uid = s->st_uid;
+// NCB 12/9/02		oh->yst_gid = s->yst_uid;
+		oh->yst_gid = s->st_gid;
+		oh->yst_atime = s->st_atime;
+		oh->yst_mtime = s->st_mtime;
+		oh->yst_ctime = s->st_ctime;
+		oh->yst_rdev  = s->st_rdev;
+	}
+	
+	if(t == YAFFS_OBJECT_TYPE_FILE)
+	{
+		oh->fileSize = s->st_size;
+	}
+	
+	if(t == YAFFS_OBJECT_TYPE_HARDLINK)
+	{
+		oh->equivalentObjectId = equivalentObj;
+	}
+	
+	if(t == YAFFS_OBJECT_TYPE_SYMLINK)
+	{
+		strncpy(oh->alias,alias,YAFFS_MAX_ALIAS_LENGTH);
+	}
+
+    if (convert_endian)
+    {
+        object_header_little_to_big_endian(oh);
+    }
+	
+	return write_chunk(bytes,objId,0,0xffff);
+	
+}
+
+
+static int process_directory(int parent, const char *path)
+{
+
+	DIR *dir;
+	struct dirent *entry;
+
+	nDirectories++;
+	
+	dir = opendir(path);
+	
+	if(dir)
+	{
+		while((entry = readdir(dir)) != NULL)
+		{
+		
+			/* Ignore . and .. */
+			if(strcmp(entry->d_name,".") &&
+			   strcmp(entry->d_name,".."))
+ 			{
+ 				char full_name[500];
+				struct stat stats;
+				int equivalentObj;
+				int newObj;
+				
+				sprintf(full_name,"%s/%s",path,entry->d_name);
+				
+				lstat(full_name,&stats);
+				
+				if(S_ISLNK(stats.st_mode) ||
+				    S_ISREG(stats.st_mode) ||
+				    S_ISDIR(stats.st_mode) ||
+				    S_ISFIFO(stats.st_mode) ||
+				    S_ISBLK(stats.st_mode) ||
+				    S_ISCHR(stats.st_mode) ||
+				    S_ISSOCK(stats.st_mode))
+				{
+				
+					newObj = obj_id++;
+					nObjects++;
+					
+					printf("Object %d, %s is a ",newObj,full_name);
+					
+					/* We're going to create an object for it */
+					if((equivalentObj = find_obj_in_list(stats.st_dev, stats.st_ino)) > 0)
+					{
+					 	/* we need to make a hard link */
+					 	printf("hard link to object %d\n",equivalentObj);
+						error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_HARDLINK, &stats, parent, entry->d_name, equivalentObj, NULL);
+					}
+					else 
+					{
+						
+						add_obj_to_list(stats.st_dev,stats.st_ino,newObj);
+						
+						if(S_ISLNK(stats.st_mode))
+						{
+					
+							char symname[500];
+						
+							memset(symname,0, sizeof(symname));
+					
+							readlink(full_name,symname,sizeof(symname) -1);
+						
+							printf("symlink to \"%s\"\n",symname);
+							error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_SYMLINK, &stats, parent, entry->d_name, -1, symname);
+
+						}
+						else if(S_ISREG(stats.st_mode))
+						{
+							printf("file, ");
+							error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_FILE, &stats, parent, entry->d_name, -1, NULL);
+
+							if(error >= 0)
+							{
+								int h;
+								__u8 bytes[512];
+								int nBytes;
+								int chunk = 0;
+								
+								h = open(full_name,O_RDONLY);
+								if(h >= 0)
+								{
+									memset(bytes,0xff,512);
+									while((nBytes = read(h,bytes,512)) > 0)
+									{
+										chunk++;
+										write_chunk(bytes,newObj,chunk,nBytes);
+										memset(bytes,0xff,512);
+									}
+									if(nBytes < 0) 
+									   error = nBytes;
+									   
+									printf("%d data chunks written\n",chunk);
+								}
+								else
+								{
+									perror("Error opening file");
+								}
+								close(h);
+								
+							}							
+														
+						}
+						else if(S_ISSOCK(stats.st_mode))
+						{
+							printf("socket\n");
+							error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
+						}
+						else if(S_ISFIFO(stats.st_mode))
+						{
+							printf("fifo\n");
+							error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
+						}
+						else if(S_ISCHR(stats.st_mode))
+						{
+							printf("character device\n");
+							error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
+						}
+						else if(S_ISBLK(stats.st_mode))
+						{
+							printf("block device\n");
+							error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_SPECIAL, &stats, parent, entry->d_name, -1, NULL);
+						}
+						else if(S_ISDIR(stats.st_mode))
+						{
+							printf("directory\n");
+							error =  write_object_header(newObj, YAFFS_OBJECT_TYPE_DIRECTORY, &stats, parent, entry->d_name, -1, NULL);
+// NCB modified 10/9/2001				process_directory(1,full_name);
+							process_directory(newObj,full_name);
+						}
+					}
+				}
+				else
+				{
+					printf(" we don't handle this type\n");
+				}
+			}
+		}
+	}
+	
+	return 0;
+
+}
+
+
+int main(int argc, char *argv[])
+{
+	struct stat stats;
+	
+	printf("mkyaffsimage: image building tool for YAFFS built "__DATE__"\n");
+	
+	if(argc < 3)
+	{
+		printf("usage: mkyaffsimage dir image_file [convert]\n");
+		printf("           dir        the directory tree to be converted\n");
+		printf("           image_file the output file to hold the image\n");
+        printf("           'convert'  produce a big-endian image from a little-endian machine\n");
+		exit(1);
+	}
+
+    if ((argc == 4) && (!strncmp(argv[3], "convert", strlen("convert"))))
+    {
+        convert_endian = 1;
+    }
+    
+	if(stat(argv[1],&stats) < 0)
+	{
+		printf("Could not stat %s\n",argv[1]);
+		exit(1);
+	}
+	
+	if(!S_ISDIR(stats.st_mode))
+	{
+		printf(" %s is not a directory\n",argv[1]);
+		exit(1);
+	}
+	
+	outFile = open(argv[2],O_CREAT | O_TRUNC | O_WRONLY, S_IREAD | S_IWRITE);
+	
+	
+	if(outFile < 0)
+	{
+		printf("Could not open output file %s\n",argv[2]);
+		exit(1);
+	}
+	
+	printf("Processing directory %s into image file %s\n",argv[1],argv[2]);
+	error =  write_object_header(1, YAFFS_OBJECT_TYPE_DIRECTORY, &stats, 1,"", -1, NULL);
+	if(error)
+	error = process_directory(YAFFS_OBJECTID_ROOT,argv[1]);
+	
+	close(outFile);
+	
+	if(error < 0)
+	{
+		perror("operation incomplete");
+		exit(1);
+	}
+	else
+	{
+		printf("Operation complete.\n"
+		       "%d objects in %d directories\n"
+		       "%d NAND pages\n",nObjects, nDirectories, nPages);
+	}
+	
+	close(outFile);
+	
+	exit(0);
+}	
+