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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-07-27 17:28:43 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-07-28 16:33:57 +0200
commitf7fa69e896f0971629f938be93cb30865f92943c (patch)
treedb6dd754b95cec7db7a274c882c5eb07e5982e3d /lib/sqfs/data_writer.c
parent256c2458a4fa298c876d8e4a4450cb9a0834b877 (diff)
Add general purpose flags field to file_info_t
Simplifies some task if we can just add a flag that a file has a framgent or that it has already been detected as a duplicate. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/sqfs/data_writer.c')
-rw-r--r--lib/sqfs/data_writer.c21
1 files changed, 8 insertions, 13 deletions
diff --git a/lib/sqfs/data_writer.c b/lib/sqfs/data_writer.c
index 496d636..e9a6193 100644
--- a/lib/sqfs/data_writer.c
+++ b/lib/sqfs/data_writer.c
@@ -138,10 +138,10 @@ static file_info_t *fragment_by_chksum(file_info_t *fi, uint32_t chksum,
break;
}
- if (it->fragment == 0xFFFFFFFF)
+ if (!(it->flags & FILE_FLAG_HAS_FRAGMENT))
continue;
- if (it->fragment_offset == 0xFFFFFFFF)
+ if (it->flags & FILE_FLAG_FRAGMENT_IS_DUPLICATE)
continue;
if ((it->size % block_size) != frag_size)
@@ -158,11 +158,8 @@ static size_t get_block_count(file_info_t *fi, size_t block_size)
{
size_t count = fi->size / block_size;
- if ((fi->size % block_size != 0) &&
- (fi->fragment == 0xFFFFFFFF ||
- fi->fragment_offset == 0xFFFFFFFF)) {
+ if ((fi->size % block_size) && !(fi->flags & FILE_FLAG_HAS_FRAGMENT))
++count;
- }
while (count > 0 && fi->blocks[count - 1].size == 0)
--count;
@@ -201,21 +198,15 @@ static uint64_t find_equal_blocks(file_info_t *file, file_info_t *list,
break;
}
- location = 0;
-
for (it = list; it != NULL; it = it->next) {
if (it == file) {
it = NULL;
break;
}
- /* XXX: list assumed to be processed in order, prevent us from
- re-checking files we know are duplicates */
- if (it->startblock < location)
+ if (it->flags & FILE_FLAG_BLOCKS_ARE_DUPLICATE)
continue;
- location = it->startblock;
-
cmp_blk_count = get_block_count(it, block_size);
if (cmp_blk_count == 0)
continue;
@@ -279,6 +270,8 @@ static int flush_data_block(data_writer_t *data, size_t size,
chksum = update_crc32(0, data->block, size);
if (size < data->super->block_size && !(flags & DW_DONT_FRAGMENT)) {
+ fi->flags |= FILE_FLAG_HAS_FRAGMENT;
+
ref = fragment_by_chksum(fi, chksum, size, list,
data->super->block_size);
@@ -286,6 +279,7 @@ static int flush_data_block(data_writer_t *data, size_t size,
fi->fragment_chksum = ref->fragment_chksum;
fi->fragment_offset = ref->fragment_offset;
fi->fragment = ref->fragment;
+ fi->flags |= FILE_FLAG_FRAGMENT_IS_DUPLICATE;
return 0;
}
@@ -344,6 +338,7 @@ static int end_file(data_writer_t *data, file_info_t *fi,
if (ref > 0) {
fi->startblock = ref;
+ fi->flags |= FILE_FLAG_BLOCKS_ARE_DUPLICATE;
if (lseek(data->outfd, start, SEEK_SET) == (off_t)-1)
goto fail_seek;