From: Quinn Tran <quinn.t...@cavium.com>
Corrupted ATIO is defined as length of fcp_header & fcp_cmd
payload is less than 0x38. It's the minimum size for a frame to
carry 8..16 bytes SCSI CDB. The exchange will be dropped or
terminated if corrupted.
Signed-off-by: Quinn Tran <quinn.t...@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madh...@cavium.com>
---
drivers/scsi/qla2xxx/qla_def.h | 3 ++-
drivers/scsi/qla2xxx/qla_target.c | 22 +++++++++++++++++++---
drivers/scsi/qla2xxx/qla_target.h | 17 ++++++++++++++++-
3 files changed, 37 insertions(+), 5 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index f7df01b..b14455e 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -1556,7 +1556,8 @@ struct link_statistics {
struct atio {
uint8_t entry_type; /* Entry type. */
uint8_t entry_count; /* Entry count. */
- uint8_t data[58];
+ uint16_t attr_n_length;
+ uint8_t data[56];
uint32_t signature;
#define ATIO_PROCESSED 0xDEADDEAD /* Signature */
};
diff --git a/drivers/scsi/qla2xxx/qla_target.c
b/drivers/scsi/qla2xxx/qla_target.c
index 5037b51..7ae179a 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -6451,12 +6451,28 @@ static void qlt_disable_vha(struct scsi_qla_host *vha)
if (!vha->flags.online)
return;
- while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
+ while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
+ FCPCMD_IS_CORRUPTED(ha->tgt.atio_ring_ptr)) {
pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
cnt = pkt->u.raw.entry_count;
- qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt,
- ha_locked);
+ if (unlikely(FCPCMD_IS_CORRUPTED(ha->tgt.atio_ring_ptr))) {
+ /* This packet is corrupted. The header + payload
+ * can not be trusted. There is no point in passing
+ * it further up.
+ */
+ ql_log(ql_log_warn, vha, 0xffff,
+ "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x]
%64phN\n",
+ pkt->u.isp24.fcp_hdr.s_id,
+ be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
+ le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
+
+ ADJ_CORRUPTED_ATIO(pkt);
+ qlt_send_term_exchange(vha, NULL, pkt, ha_locked, 0);
+ } else {
+ qlt_24xx_atio_pkt_all_vps(vha,
+ (struct atio_from_isp *)pkt, ha_locked);
+ }
for (i = 0; i < cnt; i++) {
ha->tgt.atio_ring_index++;
diff --git a/drivers/scsi/qla2xxx/qla_target.h
b/drivers/scsi/qla2xxx/qla_target.h
index f26c5f6..15359f0 100644
--- a/drivers/scsi/qla2xxx/qla_target.h
+++ b/drivers/scsi/qla2xxx/qla_target.h
@@ -427,13 +427,28 @@ struct atio_from_isp {
struct {
uint8_t entry_type; /* Entry type. */
uint8_t entry_count; /* Entry count. */
- uint8_t data[58];
+ uint16_t attr_n_length;
+#define FCP_CMD_LENTH_MASK 0x0fff
+#define FCP_CMD_LENTH_MIN 0x38
+ uint8_t data[56];
uint32_t signature;
#define ATIO_PROCESSED 0xDEADDEAD /* Signature */
} raw;
} u;
} __packed;
+#define FCPCMD_IS_CORRUPTED(_a)
\
+ ((_a->entry_type == ATIO_TYPE7) && \
+ ((le16_to_cpu(_a->attr_n_length) & FCP_CMD_LENTH_MASK) < \
+ FCP_CMD_LENTH_MIN))
+
+/* adjust corrupted atio so we won't trip over the same entry again. */
+#define ADJ_CORRUPTED_ATIO(_a) \
+{ \
+ _a->u.raw.attr_n_length = cpu_to_le16(FCP_CMD_LENTH_MIN); \
+ ((struct atio_from_isp *)_a)->u.isp24.fcp_cmnd.add_cdb_len = 0; \
+}
+
#define CTIO_TYPE7 0x12 /* Continue target I/O entry (for 24xx) */
/*
--
1.8.3.1
--
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