diff options
Diffstat (limited to 'fs/smb/client/compress.c')
| -rw-r--r-- | fs/smb/client/compress.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/fs/smb/client/compress.c b/fs/smb/client/compress.c index db709f5cd2e1..e0c44b46080e 100644 --- a/fs/smb/client/compress.c +++ b/fs/smb/client/compress.c @@ -44,7 +44,7 @@ struct bucket { unsigned int count; }; -/** +/* * has_low_entropy() - Compute Shannon entropy of the sampled data. * @bkt: Bytes counts of the sample. * @slen: Size of the sample. @@ -82,7 +82,7 @@ static bool has_low_entropy(struct bucket *bkt, size_t slen) #define BYTE_DIST_BAD 0 #define BYTE_DIST_GOOD 1 #define BYTE_DIST_MAYBE 2 -/** +/* * calc_byte_distribution() - Compute byte distribution on the sampled data. * @bkt: Byte counts of the sample. * @slen: Size of the sample. @@ -182,7 +182,7 @@ static int collect_sample(const struct iov_iter *source, ssize_t max, u8 *sample return s; } -/** +/* * is_compressible() - Determines if a chunk of data is compressible. * @data: Iterator containing uncompressed data. * @@ -261,6 +261,21 @@ out: return ret; } +/* + * should_compress() - Determines if a request (write) or the response to a + * request (read) should be compressed. + * @tcon: tcon of the request is being sent to + * @rqst: request to evaluate + * + * Return: true iff: + * - compression was successfully negotiated with server + * - server has enabled compression for the share + * - it's a read or write request + * - (write only) request length is >= SMB_COMPRESS_MIN_LEN + * - (write only) is_compressible() returns 1 + * + * Return false otherwise. + */ bool should_compress(const struct cifs_tcon *tcon, const struct smb_rqst *rq) { const struct smb2_hdr *shdr = rq->rq_iov->iov_base; @@ -310,7 +325,7 @@ int smb_compress(struct TCP_Server_Info *server, struct smb_rqst *rq, compress_s iter = rq->rq_iter; if (!copy_from_iter_full(src, slen, &iter)) { - ret = -EIO; + ret = smb_EIO(smb_eio_trace_compress_copy); goto err_free; } |