diff options
Diffstat (limited to 'fs/cramfs/cramfs.c')
| -rw-r--r-- | fs/cramfs/cramfs.c | 38 |
1 files changed, 23 insertions, 15 deletions
diff --git a/fs/cramfs/cramfs.c b/fs/cramfs/cramfs.c index 98ff567..f02bf3c 100644 --- a/fs/cramfs/cramfs.c +++ b/fs/cramfs/cramfs.c @@ -42,17 +42,22 @@ struct cramfs_super super; +/* CPU address space offset calculation macro, struct part_info offset is + * device address space offset, so we need to shift it by a device start address. */ +extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; +#define PART_OFFSET(x) (x->offset + flash_info[x->dev->id->num].start[0]) + static int cramfs_read_super (struct part_info *info) { unsigned long root_offset; /* Read the first block and get the superblock from it */ - memcpy (&super, (void *) info->offset, sizeof (super)); + memcpy (&super, (void *) PART_OFFSET(info), sizeof (super)); /* Do sanity checks on the superblock */ if (super.magic != CRAMFS_32 (CRAMFS_MAGIC)) { /* check at 512 byte offset */ - memcpy (&super, (void *) info->offset + 512, sizeof (super)); + memcpy (&super, (void *) PART_OFFSET(info) + 512, sizeof (super)); if (super.magic != CRAMFS_32 (CRAMFS_MAGIC)) { printf ("cramfs: wrong magic\n"); return -1; @@ -87,7 +92,7 @@ static int cramfs_read_super (struct part_info *info) return 0; } -static unsigned long cramfs_resolve (char *begin, unsigned long offset, +static unsigned long cramfs_resolve (unsigned long begin, unsigned long offset, unsigned long size, int raw, char *filename) { @@ -150,7 +155,7 @@ static unsigned long cramfs_resolve (char *begin, unsigned long offset, return 0; } -static int cramfs_uncompress (char *begin, unsigned long offset, +static int cramfs_uncompress (unsigned long begin, unsigned long offset, unsigned long loadoffset) { struct cramfs_inode *inode = (struct cramfs_inode *) (begin + offset); @@ -187,7 +192,7 @@ int cramfs_load (char *loadoffset, struct part_info *info, char *filename) if (cramfs_read_super (info)) return -1; - offset = cramfs_resolve (info->offset, + offset = cramfs_resolve (PART_OFFSET(info), CRAMFS_GET_OFFSET (&(super.root)) << 2, CRAMFS_24 (super.root.size), 0, strtok (filename, "/")); @@ -195,14 +200,14 @@ int cramfs_load (char *loadoffset, struct part_info *info, char *filename) if (offset <= 0) return offset; - return cramfs_uncompress (info->offset, offset, + return cramfs_uncompress (PART_OFFSET(info), offset, (unsigned long) loadoffset); } static int cramfs_list_inode (struct part_info *info, unsigned long offset) { struct cramfs_inode *inode = (struct cramfs_inode *) - (info->offset + offset); + (PART_OFFSET(info) + offset); char *name, str[20]; int namelen, nextoff; @@ -233,7 +238,7 @@ static int cramfs_list_inode (struct part_info *info, unsigned long offset) unsigned long size = CRAMFS_24 (inode->size); char *link = malloc (size); - if (link != NULL && cramfs_uncompress (info->offset, offset, + if (link != NULL && cramfs_uncompress (PART_OFFSET(info), offset, (unsigned long) link) == size) printf (" -> %*.*s\n", (int) size, (int) size, link); @@ -262,7 +267,7 @@ int cramfs_ls (struct part_info *info, char *filename) size = CRAMFS_24 (super.root.size); } else { /* Resolve the path */ - offset = cramfs_resolve (info->offset, + offset = cramfs_resolve (PART_OFFSET(info), CRAMFS_GET_OFFSET (&(super.root)) << 2, CRAMFS_24 (super.root.size), 1, strtok (filename, "/")); @@ -271,7 +276,7 @@ int cramfs_ls (struct part_info *info, char *filename) return offset; /* Resolving was successful. Examine the inode */ - inode = (struct cramfs_inode *) (info->offset + offset); + inode = (struct cramfs_inode *) (PART_OFFSET(info) + offset); if (!S_ISDIR (CRAMFS_16 (inode->mode))) { /* It's not a directory - list it, and that's that */ return (cramfs_list_inode (info, offset) > 0); @@ -284,7 +289,7 @@ int cramfs_ls (struct part_info *info, char *filename) /* List the given directory */ while (inodeoffset < size) { - inode = (struct cramfs_inode *) (info->offset + offset + + inode = (struct cramfs_inode *) (PART_OFFSET(info) + offset + inodeoffset); nextoffset = cramfs_list_inode (info, offset + inodeoffset); @@ -324,14 +329,17 @@ int cramfs_info (struct part_info *info) int cramfs_check (struct part_info *info) { - struct cramfs_super *sb = (struct cramfs_super *) info->offset; + struct cramfs_super *sb; + + if (info->dev->id->type != MTD_DEV_TYPE_NOR) + return 0; + sb = (struct cramfs_super *) PART_OFFSET(info); if (sb->magic != CRAMFS_32 (CRAMFS_MAGIC)) { /* check at 512 byte offset */ - sb = (struct cramfs_super *) (info->offset + 512); - if (sb->magic != CRAMFS_32 (CRAMFS_MAGIC)) { + sb = (struct cramfs_super *) (PART_OFFSET(info) + 512); + if (sb->magic != CRAMFS_32 (CRAMFS_MAGIC)) return 0; - } } return 1; } |