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f50332ff25
Using seq_putc to print a single character saves at least a strlen() call and a memory access, and may also give a small .text reduction. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Reviewed-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Christoph Hellwig <hch@lst.de>
289 lines
6.6 KiB
C
289 lines
6.6 KiB
C
/*
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* Copyright (C) 2010 FUJITSU LIMITED
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* Copyright (C) 2010 Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/kernel.h>
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#include <linux/trace_seq.h>
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#include <trace/events/scsi.h>
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#define SERVICE_ACTION16(cdb) (cdb[1] & 0x1f)
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#define SERVICE_ACTION32(cdb) ((cdb[8] << 8) | cdb[9])
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static const char *
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scsi_trace_misc(struct trace_seq *, unsigned char *, int);
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static const char *
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scsi_trace_rw6(struct trace_seq *p, unsigned char *cdb, int len)
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{
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const char *ret = trace_seq_buffer_ptr(p);
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sector_t lba = 0, txlen = 0;
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lba |= ((cdb[1] & 0x1F) << 16);
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lba |= (cdb[2] << 8);
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lba |= cdb[3];
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txlen = cdb[4];
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trace_seq_printf(p, "lba=%llu txlen=%llu",
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(unsigned long long)lba, (unsigned long long)txlen);
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trace_seq_putc(p, 0);
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return ret;
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}
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static const char *
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scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len)
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{
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const char *ret = trace_seq_buffer_ptr(p);
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sector_t lba = 0, txlen = 0;
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lba |= (cdb[2] << 24);
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lba |= (cdb[3] << 16);
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lba |= (cdb[4] << 8);
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lba |= cdb[5];
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txlen |= (cdb[7] << 8);
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txlen |= cdb[8];
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trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
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(unsigned long long)lba, (unsigned long long)txlen,
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cdb[1] >> 5);
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if (cdb[0] == WRITE_SAME)
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trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
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trace_seq_putc(p, 0);
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return ret;
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}
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static const char *
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scsi_trace_rw12(struct trace_seq *p, unsigned char *cdb, int len)
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{
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const char *ret = trace_seq_buffer_ptr(p);
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sector_t lba = 0, txlen = 0;
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lba |= (cdb[2] << 24);
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lba |= (cdb[3] << 16);
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lba |= (cdb[4] << 8);
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lba |= cdb[5];
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txlen |= (cdb[6] << 24);
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txlen |= (cdb[7] << 16);
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txlen |= (cdb[8] << 8);
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txlen |= cdb[9];
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trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
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(unsigned long long)lba, (unsigned long long)txlen,
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cdb[1] >> 5);
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trace_seq_putc(p, 0);
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return ret;
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}
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static const char *
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scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len)
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{
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const char *ret = trace_seq_buffer_ptr(p);
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sector_t lba = 0, txlen = 0;
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lba |= ((u64)cdb[2] << 56);
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lba |= ((u64)cdb[3] << 48);
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lba |= ((u64)cdb[4] << 40);
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lba |= ((u64)cdb[5] << 32);
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lba |= (cdb[6] << 24);
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lba |= (cdb[7] << 16);
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lba |= (cdb[8] << 8);
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lba |= cdb[9];
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txlen |= (cdb[10] << 24);
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txlen |= (cdb[11] << 16);
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txlen |= (cdb[12] << 8);
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txlen |= cdb[13];
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trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
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(unsigned long long)lba, (unsigned long long)txlen,
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cdb[1] >> 5);
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if (cdb[0] == WRITE_SAME_16)
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trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
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trace_seq_putc(p, 0);
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return ret;
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}
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static const char *
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scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len)
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{
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const char *ret = trace_seq_buffer_ptr(p), *cmd;
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sector_t lba = 0, txlen = 0;
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u32 ei_lbrt = 0;
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switch (SERVICE_ACTION32(cdb)) {
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case READ_32:
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cmd = "READ";
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break;
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case VERIFY_32:
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cmd = "VERIFY";
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break;
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case WRITE_32:
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cmd = "WRITE";
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break;
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case WRITE_SAME_32:
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cmd = "WRITE_SAME";
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break;
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default:
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trace_seq_puts(p, "UNKNOWN");
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goto out;
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}
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lba |= ((u64)cdb[12] << 56);
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lba |= ((u64)cdb[13] << 48);
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lba |= ((u64)cdb[14] << 40);
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lba |= ((u64)cdb[15] << 32);
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lba |= (cdb[16] << 24);
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lba |= (cdb[17] << 16);
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lba |= (cdb[18] << 8);
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lba |= cdb[19];
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ei_lbrt |= (cdb[20] << 24);
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ei_lbrt |= (cdb[21] << 16);
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ei_lbrt |= (cdb[22] << 8);
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ei_lbrt |= cdb[23];
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txlen |= (cdb[28] << 24);
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txlen |= (cdb[29] << 16);
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txlen |= (cdb[30] << 8);
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txlen |= cdb[31];
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trace_seq_printf(p, "%s_32 lba=%llu txlen=%llu protect=%u ei_lbrt=%u",
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cmd, (unsigned long long)lba,
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(unsigned long long)txlen, cdb[10] >> 5, ei_lbrt);
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if (SERVICE_ACTION32(cdb) == WRITE_SAME_32)
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trace_seq_printf(p, " unmap=%u", cdb[10] >> 3 & 1);
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out:
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trace_seq_putc(p, 0);
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return ret;
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}
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static const char *
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scsi_trace_unmap(struct trace_seq *p, unsigned char *cdb, int len)
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{
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const char *ret = trace_seq_buffer_ptr(p);
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unsigned int regions = cdb[7] << 8 | cdb[8];
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trace_seq_printf(p, "regions=%u", (regions - 8) / 16);
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trace_seq_putc(p, 0);
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return ret;
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}
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static const char *
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scsi_trace_service_action_in(struct trace_seq *p, unsigned char *cdb, int len)
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{
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const char *ret = trace_seq_buffer_ptr(p), *cmd;
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sector_t lba = 0;
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u32 alloc_len = 0;
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switch (SERVICE_ACTION16(cdb)) {
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case SAI_READ_CAPACITY_16:
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cmd = "READ_CAPACITY_16";
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break;
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case SAI_GET_LBA_STATUS:
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cmd = "GET_LBA_STATUS";
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break;
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default:
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trace_seq_puts(p, "UNKNOWN");
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goto out;
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}
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lba |= ((u64)cdb[2] << 56);
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lba |= ((u64)cdb[3] << 48);
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lba |= ((u64)cdb[4] << 40);
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lba |= ((u64)cdb[5] << 32);
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lba |= (cdb[6] << 24);
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lba |= (cdb[7] << 16);
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lba |= (cdb[8] << 8);
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lba |= cdb[9];
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alloc_len |= (cdb[10] << 24);
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alloc_len |= (cdb[11] << 16);
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alloc_len |= (cdb[12] << 8);
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alloc_len |= cdb[13];
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trace_seq_printf(p, "%s lba=%llu alloc_len=%u", cmd,
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(unsigned long long)lba, alloc_len);
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out:
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trace_seq_putc(p, 0);
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return ret;
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}
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static const char *
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scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len)
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{
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switch (SERVICE_ACTION32(cdb)) {
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case READ_32:
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case VERIFY_32:
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case WRITE_32:
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case WRITE_SAME_32:
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return scsi_trace_rw32(p, cdb, len);
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default:
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return scsi_trace_misc(p, cdb, len);
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}
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}
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static const char *
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scsi_trace_misc(struct trace_seq *p, unsigned char *cdb, int len)
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{
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const char *ret = trace_seq_buffer_ptr(p);
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trace_seq_putc(p, '-');
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trace_seq_putc(p, 0);
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return ret;
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}
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const char *
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scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len)
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{
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switch (cdb[0]) {
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case READ_6:
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case WRITE_6:
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return scsi_trace_rw6(p, cdb, len);
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case READ_10:
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case VERIFY:
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case WRITE_10:
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case WRITE_SAME:
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return scsi_trace_rw10(p, cdb, len);
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case READ_12:
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case VERIFY_12:
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case WRITE_12:
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return scsi_trace_rw12(p, cdb, len);
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case READ_16:
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case VERIFY_16:
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case WRITE_16:
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case WRITE_SAME_16:
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return scsi_trace_rw16(p, cdb, len);
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case UNMAP:
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return scsi_trace_unmap(p, cdb, len);
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case SERVICE_ACTION_IN_16:
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return scsi_trace_service_action_in(p, cdb, len);
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case VARIABLE_LENGTH_CMD:
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return scsi_trace_varlen(p, cdb, len);
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default:
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return scsi_trace_misc(p, cdb, len);
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}
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}
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