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1 | /* | |
2 | * Copyright (C) 2010 FUJITSU LIMITED | |
3 | * Copyright (C) 2010 Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/trace_seq.h> | |
20 | #include <trace/events/scsi.h> | |
21 | ||
22 | #define SERVICE_ACTION(cdb) ((cdb[8] << 8) | cdb[9]) | |
23 | ||
24 | static const char * | |
25 | scsi_trace_misc(struct trace_seq *, unsigned char *, int); | |
26 | ||
27 | static const char * | |
28 | scsi_trace_rw6(struct trace_seq *p, unsigned char *cdb, int len) | |
29 | { | |
30 | const char *ret = p->buffer + p->len; | |
31 | sector_t lba = 0, txlen = 0; | |
32 | ||
33 | lba |= ((cdb[1] & 0x1F) << 16); | |
34 | lba |= (cdb[2] << 8); | |
35 | lba |= cdb[3]; | |
36 | txlen = cdb[4]; | |
37 | ||
38 | trace_seq_printf(p, "lba=%llu txlen=%llu", | |
39 | (unsigned long long)lba, (unsigned long long)txlen); | |
40 | trace_seq_putc(p, 0); | |
41 | ||
42 | return ret; | |
43 | } | |
44 | ||
45 | static const char * | |
46 | scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len) | |
47 | { | |
48 | const char *ret = p->buffer + p->len; | |
49 | sector_t lba = 0, txlen = 0; | |
50 | ||
51 | lba |= (cdb[2] << 24); | |
52 | lba |= (cdb[3] << 16); | |
53 | lba |= (cdb[4] << 8); | |
54 | lba |= cdb[5]; | |
55 | txlen |= (cdb[7] << 8); | |
56 | txlen |= cdb[8]; | |
57 | ||
58 | trace_seq_printf(p, "lba=%llu txlen=%llu", | |
59 | (unsigned long long)lba, (unsigned long long)txlen); | |
60 | trace_seq_putc(p, 0); | |
61 | ||
62 | return ret; | |
63 | } | |
64 | ||
65 | static const char * | |
66 | scsi_trace_rw12(struct trace_seq *p, unsigned char *cdb, int len) | |
67 | { | |
68 | const char *ret = p->buffer + p->len; | |
69 | sector_t lba = 0, txlen = 0; | |
70 | ||
71 | lba |= (cdb[2] << 24); | |
72 | lba |= (cdb[3] << 16); | |
73 | lba |= (cdb[4] << 8); | |
74 | lba |= cdb[5]; | |
75 | txlen |= (cdb[6] << 24); | |
76 | txlen |= (cdb[7] << 16); | |
77 | txlen |= (cdb[8] << 8); | |
78 | txlen |= cdb[9]; | |
79 | ||
80 | trace_seq_printf(p, "lba=%llu txlen=%llu", | |
81 | (unsigned long long)lba, (unsigned long long)txlen); | |
82 | trace_seq_putc(p, 0); | |
83 | ||
84 | return ret; | |
85 | } | |
86 | ||
87 | static const char * | |
88 | scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len) | |
89 | { | |
90 | const char *ret = p->buffer + p->len; | |
91 | sector_t lba = 0, txlen = 0; | |
92 | ||
93 | lba |= ((u64)cdb[2] << 56); | |
94 | lba |= ((u64)cdb[3] << 48); | |
95 | lba |= ((u64)cdb[4] << 40); | |
96 | lba |= ((u64)cdb[5] << 32); | |
97 | lba |= (cdb[6] << 24); | |
98 | lba |= (cdb[7] << 16); | |
99 | lba |= (cdb[8] << 8); | |
100 | lba |= cdb[9]; | |
101 | txlen |= (cdb[10] << 24); | |
102 | txlen |= (cdb[11] << 16); | |
103 | txlen |= (cdb[12] << 8); | |
104 | txlen |= cdb[13]; | |
105 | ||
106 | trace_seq_printf(p, "lba=%llu txlen=%llu", | |
107 | (unsigned long long)lba, (unsigned long long)txlen); | |
108 | trace_seq_putc(p, 0); | |
109 | ||
110 | return ret; | |
111 | } | |
112 | ||
113 | static const char * | |
114 | scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len) | |
115 | { | |
116 | const char *ret = p->buffer + p->len; | |
117 | sector_t lba = 0, txlen = 0; | |
118 | ||
119 | lba |= ((u64)cdb[12] << 56); | |
120 | lba |= ((u64)cdb[13] << 48); | |
121 | lba |= ((u64)cdb[14] << 40); | |
122 | lba |= ((u64)cdb[15] << 32); | |
123 | lba |= (cdb[16] << 24); | |
124 | lba |= (cdb[17] << 16); | |
125 | lba |= (cdb[18] << 8); | |
126 | lba |= cdb[19]; | |
127 | txlen |= (cdb[28] << 24); | |
128 | txlen |= (cdb[29] << 16); | |
129 | txlen |= (cdb[30] << 8); | |
130 | txlen |= cdb[31]; | |
131 | ||
132 | trace_seq_printf(p, "%s_32 lba=%llu txlen=%llu", | |
133 | (SERVICE_ACTION(cdb) == READ_32 ? "READ" : "WRITE"), | |
134 | (unsigned long long)lba, (unsigned long long)txlen); | |
135 | ||
136 | trace_seq_putc(p, 0); | |
137 | ||
138 | return ret; | |
139 | } | |
140 | ||
141 | static const char * | |
142 | scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len) | |
143 | { | |
144 | switch (SERVICE_ACTION(cdb)) { | |
145 | case READ_32: | |
146 | case WRITE_32: | |
147 | return scsi_trace_rw32(p, cdb, len); | |
148 | default: | |
149 | return scsi_trace_misc(p, cdb, len); | |
150 | } | |
151 | } | |
152 | ||
153 | static const char * | |
154 | scsi_trace_misc(struct trace_seq *p, unsigned char *cdb, int len) | |
155 | { | |
156 | const char *ret = p->buffer + p->len; | |
157 | ||
158 | trace_seq_printf(p, "-"); | |
159 | trace_seq_putc(p, 0); | |
160 | ||
161 | return ret; | |
162 | } | |
163 | ||
164 | const char * | |
165 | scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len) | |
166 | { | |
167 | switch (cdb[0]) { | |
168 | case READ_6: | |
169 | case WRITE_6: | |
170 | return scsi_trace_rw6(p, cdb, len); | |
171 | case READ_10: | |
172 | case WRITE_10: | |
173 | return scsi_trace_rw10(p, cdb, len); | |
174 | case READ_12: | |
175 | case WRITE_12: | |
176 | return scsi_trace_rw12(p, cdb, len); | |
177 | case READ_16: | |
178 | case WRITE_16: | |
179 | return scsi_trace_rw16(p, cdb, len); | |
180 | case VARIABLE_LENGTH_CMD: | |
181 | return scsi_trace_varlen(p, cdb, len); | |
182 | default: | |
183 | return scsi_trace_misc(p, cdb, len); | |
184 | } | |
185 | } |