diff options
Diffstat (limited to 'fs/erofs/decompressor_lzma.c')
| -rw-r--r-- | fs/erofs/decompressor_lzma.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/fs/erofs/decompressor_lzma.c b/fs/erofs/decompressor_lzma.c index 50045510a1f4..091fd5adf818 100644 --- a/fs/erofs/decompressor_lzma.c +++ b/fs/erofs/decompressor_lzma.c @@ -143,6 +143,7 @@ again: DBG_BUGON(z_erofs_lzma_head); z_erofs_lzma_head = head; spin_unlock(&z_erofs_lzma_lock); + wake_up_all(&z_erofs_lzma_wq); z_erofs_lzma_max_dictsize = dict_size; mutex_unlock(&lzma_resize_mutex); @@ -156,7 +157,7 @@ int z_erofs_lzma_decompress(struct z_erofs_decompress_req *rq, PAGE_ALIGN(rq->pageofs_out + rq->outputsize) >> PAGE_SHIFT; const unsigned int nrpages_in = PAGE_ALIGN(rq->inputsize) >> PAGE_SHIFT; - unsigned int inputmargin, inlen, outlen, pageofs; + unsigned int inlen, outlen, pageofs; struct z_erofs_lzma *strm; u8 *kin; bool bounced = false; @@ -164,16 +165,13 @@ int z_erofs_lzma_decompress(struct z_erofs_decompress_req *rq, /* 1. get the exact LZMA compressed size */ kin = kmap(*rq->in); - inputmargin = 0; - while (!kin[inputmargin & ~PAGE_MASK]) - if (!(++inputmargin & ~PAGE_MASK)) - break; - - if (inputmargin >= PAGE_SIZE) { + err = z_erofs_fixup_insize(rq, kin + rq->pageofs_in, + min_t(unsigned int, rq->inputsize, + EROFS_BLKSIZ - rq->pageofs_in)); + if (err) { kunmap(*rq->in); - return -EFSCORRUPTED; + return err; } - rq->inputsize -= inputmargin; /* 2. get an available lzma context */ again: @@ -193,9 +191,9 @@ again: xz_dec_microlzma_reset(strm->state, inlen, outlen, !rq->partial_decoding); pageofs = rq->pageofs_out; - strm->buf.in = kin + inputmargin; + strm->buf.in = kin + rq->pageofs_in; strm->buf.in_pos = 0; - strm->buf.in_size = min_t(u32, inlen, PAGE_SIZE - inputmargin); + strm->buf.in_size = min_t(u32, inlen, PAGE_SIZE - rq->pageofs_in); inlen -= strm->buf.in_size; strm->buf.out = NULL; strm->buf.out_pos = 0; @@ -219,6 +217,9 @@ again: strm->buf.out_size = min_t(u32, outlen, PAGE_SIZE - pageofs); outlen -= strm->buf.out_size; + if (!rq->out[no] && rq->fillgaps) /* deduped */ + rq->out[no] = erofs_allocpage(pagepool, + GFP_KERNEL | __GFP_NOFAIL); if (rq->out[no]) strm->buf.out = kmap(rq->out[no]) + pageofs; pageofs = 0; |