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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-09-15 20:40:01 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-09-15 20:44:41 +0200
commit428aa363dd2b44756a5b16aa17e8c2030de801a0 (patch)
tree8bc507fdcc795a5c75ef7a148e66e940d4df91b9 /lib/sqfshelper
parent129e1758a5e2cf851f042e139fdd808a9be9ce94 (diff)
Move condensed-sparse-file handling to libsquashfs
Add another helper function for getting a blocks from a condensed sparse file, then rewrite the data writer to use that instead, using an sqfs_file_t pointer instead of direct file i/o. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/sqfshelper')
-rw-r--r--lib/sqfshelper/data_writer.c80
1 files changed, 7 insertions, 73 deletions
diff --git a/lib/sqfshelper/data_writer.c b/lib/sqfshelper/data_writer.c
index a6d0297..92592c9 100644
--- a/lib/sqfshelper/data_writer.c
+++ b/lib/sqfshelper/data_writer.c
@@ -390,77 +390,15 @@ int write_data_from_file(data_writer_t *data, file_info_t *fi,
return 0;
}
-static int check_map_valid(const sqfs_sparse_map_t *map, file_info_t *fi)
-{
- const sqfs_sparse_map_t *m;
- uint64_t offset;
-
- if (map != NULL) {
- offset = map->offset;
-
- for (m = map; m != NULL; m = m->next) {
- if (m->offset < offset)
- goto fail_map;
- offset = m->offset + m->count;
- }
-
- if (offset > fi->size)
- goto fail_map_size;
- }
-
- return 0;
-fail_map_size:
- fprintf(stderr, "%s: sparse file map spans beyond file size\n",
- fi->input_file);
- return -1;
-fail_map:
- fprintf(stderr,
- "%s: sparse file map is unordered or self overlapping\n",
- fi->input_file);
- return -1;
-}
-
-static int get_sparse_block(sqfs_block_t *blk, file_info_t *fi, int infd,
- sqfs_sparse_map_t **sparse_map, uint64_t offset,
- size_t diff)
-{
- sqfs_sparse_map_t *map = *sparse_map;
- size_t start, count;
-
- while (map != NULL && map->offset < offset + diff) {
- start = 0;
- count = map->count;
-
- if (map->offset < offset)
- count -= offset - map->offset;
-
- if (map->offset > offset)
- start = map->offset - offset;
-
- if (start + count > diff)
- count = diff - start;
-
- if (read_data(fi->input_file, infd, blk->data + start, count))
- return -1;
-
- map = map->next;
- }
-
- *sparse_map = map;
- return 0;
-}
-
-int write_data_from_fd_condensed(data_writer_t *data, file_info_t *fi,
- int infd, sqfs_sparse_map_t *map, int flags)
+int write_data_from_file_condensed(data_writer_t *data, sqfs_file_t *file,
+ file_info_t *fi,
+ const sqfs_sparse_map_t *map, int flags)
{
uint32_t blk_flags = BLK_FIRST_BLOCK;
size_t diff, i = 0;
sqfs_block_t *blk;
uint64_t offset;
- if (check_map_valid(map, fi))
- return -1;
-
if (flags & DW_DONT_COMPRESS)
blk_flags |= SQFS_BLK_DONT_COMPRESS;
@@ -474,17 +412,13 @@ int write_data_from_fd_condensed(data_writer_t *data, file_info_t *fi,
diff = fi->size - offset;
}
- blk = alloc_flex(sizeof(*blk), 1, diff);
- blk->size = diff;
- blk->index = i++;
- blk->user = fi;
- blk->flags = blk_flags;
-
- if (get_sparse_block(blk, fi, infd, &map, offset, diff)) {
- free(blk);
+ if (sqfs_file_create_block_dense(file, offset, diff, fi,
+ blk_flags, map, &blk)) {
return -1;
}
+ blk->index = i++;
+
if (is_zero_block(blk->data, blk->size)) {
data->stats.sparse_blocks += 1;