From c446c1f9907e84d014edb0bf3501f30cb512e06a Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Tue, 23 Mar 2010 01:16:57 -0400 Subject: [SCSI] scsi_trace: Enhance SCSI command tracing Various SCSI trace enhancements: - Display data and protection information scatterlist lengths in the trace output - Add support for VERIFY and WRITE SAME commands and decode the UNMAP bit if applicable - Add decoding of the PROTECT field for READ/VERIFY/WRITE/WRITE SAME commands as well as the EXPECTED INITIAL REFERENCE TAG field for their 32-byte variants - Decode READ CAPACITY(16), GET LBA STATUS, and UNMAP Signed-off-by: Martin K. Petersen Signed-off-by: James Bottomley --- drivers/scsi/scsi_trace.c | 123 +++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 111 insertions(+), 12 deletions(-) (limited to 'drivers/scsi/scsi_trace.c') diff --git a/drivers/scsi/scsi_trace.c b/drivers/scsi/scsi_trace.c index 9a3342a2fa36..b587289cfacb 100644 --- a/drivers/scsi/scsi_trace.c +++ b/drivers/scsi/scsi_trace.c @@ -19,7 +19,8 @@ #include #include -#define SERVICE_ACTION(cdb) ((cdb[8] << 8) | cdb[9]) +#define SERVICE_ACTION16(cdb) (cdb[1] & 0x1f) +#define SERVICE_ACTION32(cdb) ((cdb[8] << 8) | cdb[9]) static const char * scsi_trace_misc(struct trace_seq *, unsigned char *, int); @@ -55,8 +56,9 @@ scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len) txlen |= (cdb[7] << 8); txlen |= cdb[8]; - trace_seq_printf(p, "lba=%llu txlen=%llu", - (unsigned long long)lba, (unsigned long long)txlen); + trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u", + (unsigned long long)lba, (unsigned long long)txlen, + cdb[1] >> 5); trace_seq_putc(p, 0); return ret; @@ -77,8 +79,9 @@ scsi_trace_rw12(struct trace_seq *p, unsigned char *cdb, int len) txlen |= (cdb[8] << 8); txlen |= cdb[9]; - trace_seq_printf(p, "lba=%llu txlen=%llu", - (unsigned long long)lba, (unsigned long long)txlen); + trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u", + (unsigned long long)lba, (unsigned long long)txlen, + cdb[1] >> 5); trace_seq_putc(p, 0); return ret; @@ -103,8 +106,13 @@ scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len) txlen |= (cdb[12] << 8); txlen |= cdb[13]; - trace_seq_printf(p, "lba=%llu txlen=%llu", - (unsigned long long)lba, (unsigned long long)txlen); + trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u", + (unsigned long long)lba, (unsigned long long)txlen, + cdb[1] >> 5); + + if (cdb[0] == WRITE_SAME_16) + trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1); + trace_seq_putc(p, 0); return ret; @@ -113,8 +121,27 @@ scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len) static const char * scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len) { - const char *ret = p->buffer + p->len; + const char *ret = p->buffer + p->len, *cmd; sector_t lba = 0, txlen = 0; + u32 ei_lbrt = 0; + + switch (SERVICE_ACTION32(cdb)) { + case READ_32: + cmd = "READ"; + break; + case VERIFY_32: + cmd = "VERIFY"; + break; + case WRITE_32: + cmd = "WRITE"; + break; + case WRITE_SAME_32: + cmd = "WRITE_SAME"; + break; + default: + trace_seq_printf(p, "UNKNOWN"); + goto out; + } lba |= ((u64)cdb[12] << 56); lba |= ((u64)cdb[13] << 48); @@ -124,15 +151,76 @@ scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len) lba |= (cdb[17] << 16); lba |= (cdb[18] << 8); lba |= cdb[19]; + ei_lbrt |= (cdb[20] << 24); + ei_lbrt |= (cdb[21] << 16); + ei_lbrt |= (cdb[22] << 8); + ei_lbrt |= cdb[23]; txlen |= (cdb[28] << 24); txlen |= (cdb[29] << 16); txlen |= (cdb[30] << 8); txlen |= cdb[31]; - trace_seq_printf(p, "%s_32 lba=%llu txlen=%llu", - (SERVICE_ACTION(cdb) == READ_32 ? "READ" : "WRITE"), - (unsigned long long)lba, (unsigned long long)txlen); + trace_seq_printf(p, "%s_32 lba=%llu txlen=%llu protect=%u ei_lbrt=%u", + cmd, (unsigned long long)lba, + (unsigned long long)txlen, cdb[10] >> 5, ei_lbrt); + + if (SERVICE_ACTION32(cdb) == WRITE_SAME_32) + trace_seq_printf(p, " unmap=%u", cdb[10] >> 3 & 1); + +out: + trace_seq_putc(p, 0); + + return ret; +} + +static const char * +scsi_trace_unmap(struct trace_seq *p, unsigned char *cdb, int len) +{ + const char *ret = p->buffer + p->len; + unsigned int regions = cdb[7] << 8 | cdb[8]; + + trace_seq_printf(p, "regions=%u", (regions - 8) / 16); + trace_seq_putc(p, 0); + + return ret; +} + +static const char * +scsi_trace_service_action_in(struct trace_seq *p, unsigned char *cdb, int len) +{ + const char *ret = p->buffer + p->len, *cmd; + sector_t lba = 0; + u32 alloc_len = 0; + + switch (SERVICE_ACTION16(cdb)) { + case SAI_READ_CAPACITY_16: + cmd = "READ_CAPACITY_16"; + break; + case SAI_GET_LBA_STATUS: + cmd = "GET_LBA_STATUS"; + break; + default: + trace_seq_printf(p, "UNKNOWN"); + goto out; + } + + lba |= ((u64)cdb[2] << 56); + lba |= ((u64)cdb[3] << 48); + lba |= ((u64)cdb[4] << 40); + lba |= ((u64)cdb[5] << 32); + lba |= (cdb[6] << 24); + lba |= (cdb[7] << 16); + lba |= (cdb[8] << 8); + lba |= cdb[9]; + alloc_len |= (cdb[10] << 24); + alloc_len |= (cdb[11] << 16); + alloc_len |= (cdb[12] << 8); + alloc_len |= cdb[13]; + + trace_seq_printf(p, "%s lba=%llu alloc_len=%u", cmd, + (unsigned long long)lba, alloc_len); +out: trace_seq_putc(p, 0); return ret; @@ -141,9 +229,11 @@ scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len) static const char * scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len) { - switch (SERVICE_ACTION(cdb)) { + switch (SERVICE_ACTION32(cdb)) { case READ_32: + case VERIFY_32: case WRITE_32: + case WRITE_SAME_32: return scsi_trace_rw32(p, cdb, len); default: return scsi_trace_misc(p, cdb, len); @@ -169,14 +259,23 @@ scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len) case WRITE_6: return scsi_trace_rw6(p, cdb, len); case READ_10: + case VERIFY: case WRITE_10: + case WRITE_SAME: return scsi_trace_rw10(p, cdb, len); case READ_12: + case VERIFY_12: case WRITE_12: return scsi_trace_rw12(p, cdb, len); case READ_16: + case VERIFY_16: case WRITE_16: + case WRITE_SAME_16: return scsi_trace_rw16(p, cdb, len); + case UNMAP: + return scsi_trace_unmap(p, cdb, len); + case SERVICE_ACTION_IN: + return scsi_trace_service_action_in(p, cdb, len); case VARIABLE_LENGTH_CMD: return scsi_trace_varlen(p, cdb, len); default: -- cgit v1.2.3