search for: 7410f0d

...4 bit int, and then check whether or not it is too large to fit into size_t before casting it. --- filters/cache/cache.c | 13 ++++++++++--- filters/cow/cow.c | 13 ++++++++++--- 2 files changed, 20 insertions(+), 6 deletions(-) diff --git a/filters/cache/cache.c b/filters/cache/cache.c index 7410f0d..9473f2c 100644 --- a/filters/cache/cache.c +++ b/filters/cache/cache.c @@ -72,7 +72,7 @@ static int fd = -1; static uint8_t *bitmap; /* Size of the bitmap in bytes. */ -static uint64_t bm_size; +static size_t bm_size; enum bm_entry { BLOCK_NOT_CACHED = 0, @@ -167,7 +167,14 @@ blk_set_siz...

This adds a cache filter, which works like the COW filter in reverse. For realistic use it needs a bit more work, especially to add limits on the size of the cache, a more sensible cache replacement policy, and perhaps some kind of background worker to write dirty blocks out. Rich.