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Add a "remove" command to cbfstool

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This command removes the first file it finds with the given name by changing
its type to CBFS_COMPONENT_NULL and setting the first character of its name to
a null terminator. If the "files" immediately before or after the target file
are already marked as empty, they're all merged together into one large file.

Change-Id: Idc6b2a4c355c3f039c2ccae81866e3ed6035539b
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-by: Ronald G. Minnich <rminnich@google.com>
Reviewed-on: http://review.coreboot.org/814
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Gabe Black
2012-01-27 00:33:47 -08:00
committed by Stefan Reinauer
parent dd30acdd59
commit e1bb49e2ec
2 changed files with 86 additions and 0 deletions
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56
util/cbfstool/common.c
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@ -350,6 +350,62 @@ int add_file_to_cbfs(void *content, uint32_t contentsize, uint32_t location)
return 1;
}
static struct cbfs_file *merge_adjacent_files(struct cbfs_file *first,
struct cbfs_file *second)
{
uint32_t new_length =
ntohl(first->len) + ntohl(second->len) + ntohl(second->offset);
first->len = htonl(new_length);
first->checksum = 0; // FIXME?
return first;
}
static struct cbfs_file *next_file(struct cbfs_file *prev)
{
uint32_t pos = (prev == NULL) ? phys_start :
ALIGN(virt_to_phys(prev) + ntohl(prev->len) + ntohl(prev->offset),
align);
for (; pos < phys_end; pos += align) {
if (cbfs_file_header(pos))
return (struct cbfs_file *)phys_to_virt(pos);
}
return NULL;
}
int remove_file_from_cbfs(const char *filename)
{
struct cbfs_file *prev = NULL;
struct cbfs_file *cur = next_file(prev);
struct cbfs_file *next = next_file(cur);
for (; cur; prev = cur, cur = next, next = next_file(next)) {
/* Check if this is the file to remove. */
char *name = (char *)cur + sizeof(*cur);
if (strcmp(name, filename))
continue;
/* Mark the file as free space and erase its name. */
cur->type = CBFS_COMPONENT_NULL;
name[0] = '\0';
/* Merge it with the previous file if possible. */
if (prev && prev->type == CBFS_COMPONENT_NULL)
cur = merge_adjacent_files(prev, cur);
/* Merge it with the next file if possible. */
if (next && next->type == CBFS_COMPONENT_NULL)
merge_adjacent_files(cur, next);
return 0;
}
printf("CBFS file %s not found.\n", filename);
return 1;
}
/* returns new data block with cbfs_file header, suitable to dump into the ROM. location returns
the new location that points to the cbfs_file header */
void *create_cbfs_file(const char *filename, void *data, uint32_t * datasize,