/* * Copyright (C) 2010 FUJITSU LIMITED * Copyright (C) 2010 Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include <linux/kernel.h> #include <linux/trace_seq.h> #include <trace/events/scsi.h> #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); static const char * scsi_trace_rw6(struct trace_seq *p, unsigned char *cdb, int len) { const char *ret = p->buffer + p->len; sector_t lba = 0, txlen = 0; lba |= ((cdb[1] & 0x1F) << 16); lba |= (cdb[2] << 8); lba |= cdb[3]; txlen = cdb[4]; trace_seq_printf(p, "lba=%llu txlen=%llu", (unsigned long long)lba, (unsigned long long)txlen); trace_seq_putc(p, 0); return ret; } static const char * scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len) { const char *ret = p->buffer + p->len; sector_t lba = 0, txlen = 0; lba |= (cdb[2] << 24); lba |= (cdb[3] << 16); lba |= (cdb[4] << 8); lba |= cdb[5]; txlen |= (cdb[7] << 8); txlen |= cdb[8]; 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; } static const char * scsi_trace_rw12(struct trace_seq *p, unsigned char *cdb, int len) { const char *ret = p->buffer + p->len; sector_t lba = 0, txlen = 0; lba |= (cdb[2] << 24); lba |= (cdb[3] << 16); lba |= (cdb[4] << 8); lba |= cdb[5]; txlen |= (cdb[6] << 24); txlen |= (cdb[7] << 16); txlen |= (cdb[8] << 8); txlen |= cdb[9]; 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; } static const char * scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len) { const char *ret = p->buffer + p->len; sector_t lba = 0, txlen = 0; 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]; txlen |= (cdb[10] << 24); txlen |= (cdb[11] << 16); txlen |= (cdb[12] << 8); txlen |= cdb[13]; 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; } static const char * scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int 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); lba |= ((u64)cdb[14] << 40); lba |= ((u64)cdb[15] << 32); lba |= (cdb[16] << 24); 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 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; } static const char * scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len) { 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); } } static const char * scsi_trace_misc(struct trace_seq *p, unsigned char *cdb, int len) { const char *ret = p->buffer + p->len; trace_seq_printf(p, "-"); trace_seq_putc(p, 0); return ret; } const char * scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len) { switch (cdb[0]) { case READ_6: 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: return scsi_trace_misc(p, cdb, len); } }