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scsi: use external buffer for command logging

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Use an external buffer for __scsi_print_command() and move command
logging over to use the per-cpu logging buffer.  With that we can
guarantee the command always will always be formatted in one line.
So we can even print out a variable length command correctly across
several lines. Finally rename __scsi_print_command() to
__scsi_format_comment() to better reflect the functionality.

Tested-by: Robert Elliott <elliott@hp.com>
Reviewed-by: Robert Elliott <elliott@hp.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Hannes Reinecke
2015-01-08 07:43:44 +01:00
committed by Christoph Hellwig
parent aa66ab35f2
commit 9e5ed2a5b3
6 changed files with 192 additions and 92 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/scsi/constants.c
+2 -72
View File
@@ -24,8 +24,6 @@
#define THIRD_PARTY_COPY_OUT 0x83
#define THIRD_PARTY_COPY_IN 0x84
#define VENDOR_SPECIFIC_CDB 0xc0
struct sa_name_list {
int opcode;
const struct value_name_pair *arr;
@@ -281,8 +279,8 @@ static struct sa_name_list sa_names_arr[] = {
};
#endif /* CONFIG_SCSI_CONSTANTS */
static bool scsi_opcode_sa_name(int opcode, int service_action,
const char **cdb_name, const char **sa_name)
bool scsi_opcode_sa_name(int opcode, int service_action,
const char **cdb_name, const char **sa_name)
{
struct sa_name_list *sa_name_ptr;
const struct value_name_pair *arr = NULL;
@@ -315,74 +313,6 @@ static bool scsi_opcode_sa_name(int opcode, int service_action,
return true;
}
static void print_opcode_name(const unsigned char *cdbp, size_t cdb_len)
{
int sa, cdb0;
const char *cdb_name = NULL, *sa_name = NULL;
cdb0 = cdbp[0];
if (cdb0 == VARIABLE_LENGTH_CMD) {
if (cdb_len < 10) {
printk("short variable length command, len=%zu",
cdb_len);
return;
}
sa = (cdbp[8] << 8) + cdbp[9];
} else
sa = cdbp[1] & 0x1f;
if (!scsi_opcode_sa_name(cdb0, sa, &cdb_name, &sa_name)) {
if (cdb_name)
printk("%s", cdb_name);
else if (cdb0 >= VENDOR_SPECIFIC_CDB)
printk("cdb[0]=0x%x (vendor)", cdb0);
else if (cdb0 >= 0x60 && cdb0 < 0x7e)
printk("cdb[0]=0x%x (reserved)", cdb0);
else
printk("cdb[0]=0x%x", cdb0);
} else {
if (sa_name)
printk("%s", sa_name);
else if (cdb_name)
printk("%s, sa=0x%x", cdb_name, sa);
else
printk("cdb[0]=0x%x, sa=0x%x", cdb0, sa);
}
}
void __scsi_print_command(const unsigned char *cdb, size_t cdb_len)
{
int k, len;
print_opcode_name(cdb, cdb_len);
len = scsi_command_size(cdb);
if (cdb_len < len)
len = cdb_len;
/* print out all bytes in cdb */
for (k = 0; k < len; ++k)
printk(" %02x", cdb[k]);
printk("\n");
}
EXPORT_SYMBOL(__scsi_print_command);
void scsi_print_command(struct scsi_cmnd *cmd)
{
int k;
if (cmd->cmnd == NULL)
return;
scmd_printk(KERN_INFO, cmd, "CDB: ");
print_opcode_name(cmd->cmnd, cmd->cmd_len);
/* print out all bytes in cdb */
printk(":");
for (k = 0; k < cmd->cmd_len; ++k)
printk(" %02x", cmd->cmnd[k]);
printk("\n");
}
EXPORT_SYMBOL(scsi_print_command);
#ifdef CONFIG_SCSI_CONSTANTS
struct error_info {