diff options
| author | Alexei Potashnik <alexei@purestorage.com> | 2015-07-20 17:12:12 -0700 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-07-30 23:32:57 -0700 |
| commit | aa75679c797c0250a853e600e45368f1f9545c27 (patch) | |
| tree | 539af1509f3220e8f19d9aa0f47080296d8e4457 | |
| parent | b6a54b8d895648d915c7e8308f3d3e6bf2505d69 (diff) | |
target/iscsi: Use proper SGL accessors for digest computation
Current implementation assumes that all the buffers of an IO are linked
with a single SG list, which is OK because target-core is only allocating
a contigious scatterlist region. However, this assumption is wrong for
se_cmd descriptors that want to use chaining across multiple SGL regions.
Fix this up by using proper SGL accessors for digest payload computation.
Signed-off-by: Alexei Potashnik <alexei@purestorage.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| -rw-r--r-- | drivers/target/iscsi/iscsi_target.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 4e68b62193ed..a4cf58cb835d 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -1209,7 +1209,6 @@ static u32 iscsit_do_crypto_hash_sg( u8 *pad_bytes) { u32 data_crc; - u32 i; struct scatterlist *sg; unsigned int page_off; @@ -1218,15 +1217,15 @@ static u32 iscsit_do_crypto_hash_sg( sg = cmd->first_data_sg; page_off = cmd->first_data_sg_off; - i = 0; while (data_length) { - u32 cur_len = min_t(u32, data_length, (sg[i].length - page_off)); + u32 cur_len = min_t(u32, data_length, (sg->length - page_off)); - crypto_hash_update(hash, &sg[i], cur_len); + crypto_hash_update(hash, sg, cur_len); data_length -= cur_len; page_off = 0; - i++; + /* iscsit_map_iovec has already checked for invalid sg pointers */ + sg = sg_next(sg); } if (padding) { |