/* vim:set shiftwidth=4 ts=8: */
/*
* QEMU Block driver for virtual VFAT (shadows a local directory)
- *
+ *
* Copyright (c) 2004,2005 Johannes E. Schindelin
- *
+ *
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
/* TODO: add ":bootsector=blabla.img:" */
/* LATER TODO: add automatic boot sector generation from
BOOTEASY.ASM and Ranish Partition Manager
- Note that DOS assumes the system files to be the first files in the
+ Note that DOS assumes the system files to be the first files in the
file system (test if the boot sector still relies on that fact)! */
/* MAYBE TODO: write block-visofs.c */
/* TODO: call try_commit() only after a timeout */
index_to<0 || index_to>=array->next ||
index_from<0 || index_from>=array->next)
return -1;
-
+
if(index_to==index_from)
return 0;
memmove(to+is*count,to,from-to);
else
memmove(from,from+is*count,to-from);
-
+
memcpy(to,buf,is*count);
free(buf);
BlockDriverState* bs; /* pointer to parent */
unsigned int first_sectors_number; /* 1 for a single partition, 0x40 for a disk with partition table */
unsigned char first_sectors[0x40*0x200];
-
+
int fat_type; /* 16 or 32 */
array_t fat,directory,mapping;
-
+
unsigned int cluster_size;
unsigned int sectors_per_cluster;
unsigned int sectors_per_fat;
uint32_t sector_count; /* total number of sectors of the partition */
uint32_t cluster_count; /* total number of clusters of this partition */
uint32_t max_fat_value;
-
+
int current_fd;
mapping_t* current_mapping;
unsigned char* cluster; /* points to current cluster */
partition_t* partition=&(real_mbr->partition[0]);
memset(s->first_sectors,0,512);
-
+
partition->attributes=0x80; /* bootable */
partition->start_head=1;
partition->start_sector=1;
for(i=0;i<11;i++)
chksum=(((chksum&0xfe)>>1)|((chksum&0x01)?0x80:0))
+(unsigned char)entry->name[i];
-
+
return chksum;
}
s->sectors_per_fat * 0x200 / s->fat.item_size - 1);
}
memset(s->fat.pointer,0,s->fat.size);
-
+
switch(s->fat_type) {
case 12: s->max_fat_value=0xfff; break;
case 16: s->max_fat_value=0xffff; break;
memcpy(entry->name,filename,strlen(filename));
return entry;
}
-
+
entry_long=create_long_filename(s,filename);
-
- i = strlen(filename);
+
+ i = strlen(filename);
for(j = i - 1; j>0 && filename[j]!='.';j--);
if (j > 0)
i = (j > 8 ? 8 : j);
entry=array_get_next(&(s->directory));
memset(entry->name,0x20,11);
strncpy(entry->name,filename,i);
-
+
if(j > 0)
for (i = 0; i < 3 && filename[j+1+i]; i++)
entry->extension[i] = filename[j+1+i];
if(entry1==entry) /* no dupe found */
break;
- /* use all 8 characters of name */
+ /* use all 8 characters of name */
if(entry->name[7]==' ') {
int j;
for(j=6;j>0 && entry->name[j]==' ';j--)
mapping->end = mapping->begin;
return -1;
}
-
+
i = mapping->info.dir.first_dir_index =
first_cluster == 0 ? 0 : s->directory.next;
- /* actually read the directory, and allocate the mappings */
+ /* actually read the directory, and allocate the mappings */
while((entry=readdir(dir))) {
unsigned int length=strlen(dirname)+2+strlen(entry->d_name);
char* buffer;
if(first_cluster == 0 && (is_dotdot || is_dot))
continue;
-
+
buffer=(char*)malloc(length);
assert(buffer);
snprintf(buffer,length,"%s/%s",dirname,entry->d_name);
memset(array_get(&(s->directory), cur), 0,
(ROOT_ENTRIES - cur) * sizeof(direntry_t));
}
-
+
/* reget the mapping, since s->mapping was possibly realloc()ed */
mapping = (mapping_t*)array_get(&(s->mapping), mapping_index);
first_cluster += (s->directory.next - mapping->info.dir.first_dir_index)
direntry = (direntry_t*)array_get(&(s->directory), mapping->dir_index);
set_begin_of_direntry(direntry, mapping->begin);
-
+
return 0;
}
*/
i = 1+s->sectors_per_cluster*0x200*8/s->fat_type;
s->sectors_per_fat=(s->sector_count+i)/i; /* round up */
-
+
array_init(&(s->mapping),sizeof(mapping_t));
array_init(&(s->directory),sizeof(direntry_t));
for (i = 0, cluster = 0; i < s->mapping.next; i++) {
int j;
- /* MS-DOS expects the FAT to be 0 for the root directory
+ /* MS-DOS expects the FAT to be 0 for the root directory
* (except for the media byte). */
/* LATER TODO: still true for FAT32? */
int fix_fat = (i != 0);
s->qcow_filename = NULL;
s->fat2 = NULL;
s->downcase_short_names = 1;
-
+
if (!strstart(dirname, "fat:", NULL))
return -1;
assert(index1<=index2);
DLOG(mapping=array_get(&(s->mapping),index1);
assert(mapping->begin<=cluster_num);
- assert(index2 >= s->mapping.next ||
+ assert(index2 >= s->mapping.next ||
((mapping = array_get(&(s->mapping),index2)) &&
mapping->end>cluster_num)));
}
}
#endif
-static int vvfat_read(BlockDriverState *bs, int64_t sector_num,
+static int vvfat_read(BlockDriverState *bs, int64_t sector_num,
uint8_t *buf, int nb_sectors)
{
BDRVVVFATState *s = bs->opaque;
}
/*
- * This function looks at the modified data (qcow).
+ * This function looks at the modified data (qcow).
* It returns 0 upon inconsistency or error, and the number of clusters
* used by the directory, its subdirectories and their files.
*/
} else
/* new directory */
schedule_mkdir(s, cluster_num, strdup(path));
-
+
lfn_init(&lfn);
do {
int i;
}
next_mapping->dir_index = mapping->dir_index;
- next_mapping->first_mapping_index =
+ next_mapping->first_mapping_index =
mapping->first_mapping_index < 0 ?
array_index(&(s->mapping), mapping) :
mapping->first_mapping_index;
mapping = next_mapping;
}
-
+
cluster = c1;
}
return ret;
}
- /* copy FAT (with bdrv_read) */
+ /* copy FAT (with bdrv_read) */
memcpy(s->fat.pointer, s->fat2, 0x200 * s->sectors_per_fat);
/* recurse direntries from root (using bs->bdrv_read) */
return do_commit(s);
}
-static int vvfat_write(BlockDriverState *bs, int64_t sector_num,
+static int vvfat_write(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
{
- BDRVVVFATState *s = bs->opaque;
+ BDRVVVFATState *s = bs->opaque;
int i, ret;
DLOG(checkpoint());
begin = sector_num;
if (end > sector_num + nb_sectors)
end = sector_num + nb_sectors;
- dir_index = mapping->dir_index +
+ dir_index = mapping->dir_index +
0x10 * (begin - mapping->begin * s->sectors_per_cluster);
direntries = (direntry_t*)(buf + 0x200 * (begin - sector_num));
*n = nb_sectors;
else if (*n < 0)
return 0;
- return 1;
+ return 1;
}
static int write_target_commit(BlockDriverState *bs, int64_t sector_num,
projects / qemu.git / blobdiff