[SCSI] constants.c: cleanup, verbose result printing

Clean up constants.c and make result printing more user friendly:

 - Refactor the command and sense functions so that the actual
   formatting can be called from the various helper functions with the
   correct prefix.

 - Replace scsi_print_hostbyte() and scsi_print_driverbyte() with
   scsi_print_result() which is verbose when CONFIG_SCSI_CONSTANTS is
   on.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 145 insertions, 122 deletions

diff --git a/drivers/scsi/constants.c b/drivers/scsi/constants.c
index 61f6024b61ba..611487545af4 100644
--- a/drivers/scsi/constants.c
+++ b/drivers/scsi/constants.c
@@ -202,31 +202,29 @@ static const char * get_sa_name(const struct value_name_pair * arr,
 }
 
 /* attempt to guess cdb length if cdb_len==0 . No trailing linefeed. */
-static void print_opcode_name(unsigned char * cdbp, int cdb_len,
-                              int start_of_line)
+static void print_opcode_name(unsigned char * cdbp, int cdb_len)
 {
         int sa, len, cdb0;
         const char * name;
-        const char * leadin = start_of_line ? KERN_INFO : "";
 
         cdb0 = cdbp[0];
         switch(cdb0) {
         case VARIABLE_LENGTH_CMD:
                 len = cdbp[7] + 8;
                 if (len < 10) {
-                        printk("%sshort variable length command, "
-                               "len=%d ext_len=%d", leadin, len, cdb_len);
+                        printk("short variable length command, "
+                               "len=%d ext_len=%d", len, cdb_len);
                         break;
                 }
                 sa = (cdbp[8] << 8) + cdbp[9];
                 name = get_sa_name(maint_in_arr, MAINT_IN_SZ, sa);
                 if (name) {
-                        printk("%s%s", leadin, name);
+                        printk("%s", name);
                         if ((cdb_len > 0) && (len != cdb_len))
                                 printk(", in_cdb_len=%d, ext_len=%d",
                                        len, cdb_len);
                 } else {
-                        printk("%scdb[0]=0x%x, sa=0x%x", leadin, cdb0, sa);
+                        printk("cdb[0]=0x%x, sa=0x%x", cdb0, sa);
                         if ((cdb_len > 0) && (len != cdb_len))
                                 printk(", in_cdb_len=%d, ext_len=%d",
                                        len, cdb_len);
@@ -236,83 +234,80 @@ static void print_opcode_name(unsigned char * cdbp, int cdb_len,
                 sa = cdbp[1] & 0x1f;
                 name = get_sa_name(maint_in_arr, MAINT_IN_SZ, sa);
                 if (name)
-                        printk("%s%s", leadin, name);
+                        printk("%s", name);
                 else
-                        printk("%scdb[0]=0x%x, sa=0x%x", leadin, cdb0, sa);
+                        printk("cdb[0]=0x%x, sa=0x%x", cdb0, sa);
                 break;
         case MAINTENANCE_OUT:
                 sa = cdbp[1] & 0x1f;
                 name = get_sa_name(maint_out_arr, MAINT_OUT_SZ, sa);
                 if (name)
-                        printk("%s%s", leadin, name);
+                        printk("%s", name);
                 else
-                        printk("%scdb[0]=0x%x, sa=0x%x", leadin, cdb0, sa);
+                        printk("cdb[0]=0x%x, sa=0x%x", cdb0, sa);
                 break;
         case SERVICE_ACTION_IN_12:
                 sa = cdbp[1] & 0x1f;
                 name = get_sa_name(serv_in12_arr, SERV_IN12_SZ, sa);
                 if (name)
-                        printk("%s%s", leadin, name);
+                        printk("%s", name);
                 else
-                        printk("%scdb[0]=0x%x, sa=0x%x", leadin, cdb0, sa);
+                        printk("cdb[0]=0x%x, sa=0x%x", cdb0, sa);
                 break;
         case SERVICE_ACTION_OUT_12:
                 sa = cdbp[1] & 0x1f;
                 name = get_sa_name(serv_out12_arr, SERV_OUT12_SZ, sa);
                 if (name)
-                        printk("%s%s", leadin, name);
+                        printk("%s", name);
                 else
-                        printk("%scdb[0]=0x%x, sa=0x%x", leadin, cdb0, sa);
+                        printk("cdb[0]=0x%x, sa=0x%x", cdb0, sa);
                 break;
         case SERVICE_ACTION_IN_16:
                 sa = cdbp[1] & 0x1f;
                 name = get_sa_name(serv_in16_arr, SERV_IN16_SZ, sa);
                 if (name)
-                        printk("%s%s", leadin, name);
+                        printk("%s", name);
                 else
-                        printk("%scdb[0]=0x%x, sa=0x%x", leadin, cdb0, sa);
+                        printk("cdb[0]=0x%x, sa=0x%x", cdb0, sa);
                 break;
         case SERVICE_ACTION_OUT_16:
                 sa = cdbp[1] & 0x1f;
                 name = get_sa_name(serv_out16_arr, SERV_OUT16_SZ, sa);
                 if (name)
-                        printk("%s%s", leadin, name);
+                        printk("%s", name);
                 else
-                        printk("%scdb[0]=0x%x, sa=0x%x", leadin, cdb0, sa);
+                        printk("cdb[0]=0x%x, sa=0x%x", cdb0, sa);
                 break;
         default:
                 if (cdb0 < 0xc0) {
                         name = cdb_byte0_names[cdb0];
                         if (name)
-                                printk("%s%s", leadin, name);
+                                printk("%s", name);
                         else
-                                printk("%scdb[0]=0x%x (reserved)",
-                                       leadin, cdb0);
+                                printk("cdb[0]=0x%x (reserved)", cdb0);
                 } else
-                        printk("%scdb[0]=0x%x (vendor)", leadin, cdb0);
+                        printk("cdb[0]=0x%x (vendor)", cdb0);
                 break;
         }
 }
 
 #else /* ifndef CONFIG_SCSI_CONSTANTS */
 
-static void print_opcode_name(unsigned char * cdbp, int cdb_len,
-                              int start_of_line)
+static void print_opcode_name(unsigned char * cdbp, int cdb_len)
 {
         int sa, len, cdb0;
-        const char * leadin = start_of_line ? KERN_INFO : "";
 
         cdb0 = cdbp[0];
         switch(cdb0) {
         case VARIABLE_LENGTH_CMD:
                 len = cdbp[7] + 8;
                 if (len < 10) {
-                        printk("%sshort opcode=0x%x command, len=%d "
-                               "ext_len=%d", leadin, cdb0, len, cdb_len);
+                        printk("short opcode=0x%x command, len=%d "
+                               "ext_len=%d", cdb0, len, cdb_len);
                         break;
                 }
                 sa = (cdbp[8] << 8) + cdbp[9];
-                printk("%scdb[0]=0x%x, sa=0x%x", leadin, cdb0, sa);
+                printk("cdb[0]=0x%x, sa=0x%x", cdb0, sa);
                 if (len != cdb_len)
                         printk(", in_cdb_len=%d, ext_len=%d", len, cdb_len);
                 break;
@@ -323,49 +318,48 @@ static void print_opcode_name(unsigned char * cdbp, int cdb_len,
         case SERVICE_ACTION_IN_16:
         case SERVICE_ACTION_OUT_16:
                 sa = cdbp[1] & 0x1f;
-                printk("%scdb[0]=0x%x, sa=0x%x", leadin, cdb0, sa);
+                printk("cdb[0]=0x%x, sa=0x%x", cdb0, sa);
                 break;
         default:
                 if (cdb0 < 0xc0)
-                        printk("%scdb[0]=0x%x", leadin, cdb0);
+                        printk("cdb[0]=0x%x", cdb0);
                 else
-                        printk("%scdb[0]=0x%x (vendor)", leadin, cdb0);
+                        printk("cdb[0]=0x%x (vendor)", cdb0);
                 break;
         }
 }
 #endif  
 
-void __scsi_print_command(unsigned char *command)
+void __scsi_print_command(unsigned char *cdb)
 {
         int k, len;
 
-        print_opcode_name(command, 0, 1);
-        if (VARIABLE_LENGTH_CMD == command[0])
-                len = command[7] + 8;
+        print_opcode_name(cdb, 0);
+        if (VARIABLE_LENGTH_CMD == cdb[0])
+                len = cdb[7] + 8;
         else
-                len = COMMAND_SIZE(command[0]);
+                len = COMMAND_SIZE(cdb[0]);
         /* print out all bytes in cdb */
         for (k = 0; k < len; ++k) 
-                printk(" %02x", command[k]);
+                printk(" %02x", cdb[k]);
         printk("\n");
 }
 EXPORT_SYMBOL(__scsi_print_command);
 
-/* This function (perhaps with the addition of peripheral device type)
- * is more approriate than __scsi_print_command(). Perhaps that static
- * can be dropped later if it replaces the __scsi_print_command version.
- */
-static void scsi_print_cdb(unsigned char *cdb, int cdb_len, int start_of_line)
+void scsi_print_command(struct scsi_cmnd *cmd)
 {
         int k;
 
-        print_opcode_name(cdb, cdb_len, start_of_line);
+        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 < cdb_len; ++k) 
-                printk(" %02x", cdb[k]);
+        for (k = 0; k < cmd->cmd_len; ++k)
+                printk(" %02x", cmd->cmnd[k]);
         printk("\n");
 }
+EXPORT_SYMBOL(scsi_print_command);
 
 /**
  *
@@ -1176,67 +1170,77 @@ scsi_extd_sense_format(unsigned char asc, unsigned char ascq) {
 }
 EXPORT_SYMBOL(scsi_extd_sense_format);
 
-/* Print extended sense information; no leadin, no linefeed */
-static void
+void
 scsi_show_extd_sense(unsigned char asc, unsigned char ascq)
 {
-        const char *extd_sense_fmt = scsi_extd_sense_format(asc, ascq);
+        const char *extd_sense_fmt = scsi_extd_sense_format(asc, ascq);
 
         if (extd_sense_fmt) {
                 if (strstr(extd_sense_fmt, "%x")) {
-                        printk("Additional sense: ");
+                        printk("Add. Sense: ");
                         printk(extd_sense_fmt, ascq);
                 } else
-                        printk("Additional sense: %s", extd_sense_fmt);
+                        printk("Add. Sense: %s", extd_sense_fmt);
         } else {
                 if (asc >= 0x80)
-                        printk("<<vendor>> ASC=0x%x ASCQ=0x%x", asc, ascq);
+                        printk("<<vendor>> ASC=0x%x ASCQ=0x%x", asc,
+                               ascq);
                 if (ascq >= 0x80)
-                        printk("ASC=0x%x <<vendor>> ASCQ=0x%x", asc, ascq);
+                        printk("ASC=0x%x <<vendor>> ASCQ=0x%x", asc,
+                               ascq);
                 else
                         printk("ASC=0x%x ASCQ=0x%x", asc, ascq);
         }
+
+        printk("\n");
 }
+EXPORT_SYMBOL(scsi_show_extd_sense);
 
 void
-scsi_print_sense_hdr(const char *name, struct scsi_sense_hdr *sshdr)
+scsi_show_sense_hdr(struct scsi_sense_hdr *sshdr)
 {
         const char *sense_txt;
-        /* An example of deferred is when an earlier write to disk cache
-         * succeeded, but now the disk discovers that it cannot write the
-         * data to the magnetic media.
-         */
-        const char *error = scsi_sense_is_deferred(sshdr) ? 
-                "<<DEFERRED>>" : "Current";
-        printk(KERN_INFO "%s: %s", name, error);
-        if (sshdr->response_code >= 0x72)
-                printk(" [descriptor]");
 
         sense_txt = scsi_sense_key_string(sshdr->sense_key);
         if (sense_txt)
-                printk(": sense key: %s\n", sense_txt);
+                printk("Sense Key : %s ", sense_txt);
         else
-                printk(": sense key=0x%x\n", sshdr->sense_key);
-        printk(KERN_INFO "    ");
-        scsi_show_extd_sense(sshdr->asc, sshdr->ascq);
+                printk("Sense Key : 0x%x ", sshdr->sense_key);
+
+        printk("%s", scsi_sense_is_deferred(sshdr) ? "[deferred] " :
+               "[current] ");
+
+        if (sshdr->response_code >= 0x72)
+                printk("[descriptor]");
+
         printk("\n");
 }
+EXPORT_SYMBOL(scsi_show_sense_hdr);
+
+/*
+ * Print normalized SCSI sense header with a prefix.
+ */
+void
+scsi_print_sense_hdr(const char *name, struct scsi_sense_hdr *sshdr)
+{
+        printk(KERN_INFO "%s: ", name);
+        scsi_show_sense_hdr(sshdr);
+        printk(KERN_INFO "%s: ", name);
+        scsi_show_extd_sense(sshdr->asc, sshdr->ascq);
+}
 EXPORT_SYMBOL(scsi_print_sense_hdr);
 
-/* Print sense information */
 void
-__scsi_print_sense(const char *name, const unsigned char *sense_buffer,
-                   int sense_len)
+scsi_decode_sense_buffer(const unsigned char *sense_buffer, int sense_len,
+                       struct scsi_sense_hdr *sshdr)
 {
         int k, num, res;
-        unsigned int info;
-        struct scsi_sense_hdr ssh;
     
-        res = scsi_normalize_sense(sense_buffer, sense_len, &ssh);
+        res = scsi_normalize_sense(sense_buffer, sense_len, sshdr);
         if (0 == res) {
                 /* this may be SCSI-1 sense data */
                 num = (sense_len < 32) ? sense_len : 32;
-                printk(KERN_INFO "Unrecognized sense data (in hex):");
+                printk("Unrecognized sense data (in hex):");
                 for (k = 0; k < num; ++k) {
                         if (0 == (k % 16)) {
                                 printk("\n");
@@ -1247,11 +1251,20 @@ __scsi_print_sense(const char *name, const unsigned char *sense_buffer,
                 printk("\n");
                 return;
         }
-        scsi_print_sense_hdr(name, &ssh);
-        if (ssh.response_code < 0x72) {
+}
+
+void
+scsi_decode_sense_extras(const unsigned char *sense_buffer, int sense_len,
+                         struct scsi_sense_hdr *sshdr)
+{
+        int k, num, res;
+
+        if (sshdr->response_code < 0x72)
+        {
                 /* only decode extras for "fixed" format now */
                 char buff[80];
                 int blen, fixed_valid;
+                unsigned int info;
 
                 fixed_valid = sense_buffer[0] & 0x80;
                 info = ((sense_buffer[3] << 24) | (sense_buffer[4] << 16) |
@@ -1281,13 +1294,13 @@ __scsi_print_sense(const char *name, const unsigned char *sense_buffer,
                         res += snprintf(buff + res, blen - res, "ILI");
                 }
                 if (res > 0)
-                        printk(KERN_INFO "%s\n", buff);
-        } else if (ssh.additional_length > 0) {
+                        printk("%s\n", buff);
+        } else if (sshdr->additional_length > 0) {
                 /* descriptor format with sense descriptors */
-                num = 8 + ssh.additional_length;
+                num = 8 + sshdr->additional_length;
                 num = (sense_len < num) ? sense_len : num;
-                printk(KERN_INFO "Descriptor sense data with sense "
-                       "descriptors (in hex):");
+                printk("Descriptor sense data with sense descriptors "
+                       "(in hex):");
                 for (k = 0; k < num; ++k) {
                         if (0 == (k % 16)) {
                                 printk("\n");
@@ -1295,29 +1308,42 @@ __scsi_print_sense(const char *name, const unsigned char *sense_buffer,
                         }
                         printk("%02x ", sense_buffer[k]);
                 }
+
                 printk("\n");
         }
+
 }
-EXPORT_SYMBOL(__scsi_print_sense);
 
-void scsi_print_sense(const char *devclass, struct scsi_cmnd *cmd)
+/* Normalize and print sense buffer with name prefix */
+void __scsi_print_sense(const char *name, const unsigned char *sense_buffer,
+                        int sense_len)
 {
-        const char *name = devclass;
-
-        if (cmd->request->rq_disk)
-                name = cmd->request->rq_disk->disk_name;
-        __scsi_print_sense(name, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
+        struct scsi_sense_hdr sshdr;
+
+        printk(KERN_INFO "%s: ", name);
+        scsi_decode_sense_buffer(sense_buffer, sense_len, &sshdr);
+        scsi_show_sense_hdr(&sshdr);
+        scsi_decode_sense_extras(sense_buffer, sense_len, &sshdr);
+        printk(KERN_INFO "%s: ", name);
+        scsi_show_extd_sense(sshdr.asc, sshdr.ascq);
 }
-EXPORT_SYMBOL(scsi_print_sense);
+EXPORT_SYMBOL(__scsi_print_sense);
 
-void scsi_print_command(struct scsi_cmnd *cmd)
+/* Normalize and print sense buffer in SCSI command */
+void scsi_print_sense(char *name, struct scsi_cmnd *cmd)
 {
-        /* Assume appended output (i.e. not at start of line) */
-        sdev_printk("", cmd->device, "\n");
-        printk(KERN_INFO "        command: ");
-        scsi_print_cdb(cmd->cmnd, cmd->cmd_len, 0);
+        struct scsi_sense_hdr sshdr;
+
+        scmd_printk(KERN_INFO, cmd, "");
+        scsi_decode_sense_buffer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
+                                 &sshdr);
+        scsi_show_sense_hdr(&sshdr);
+        scsi_decode_sense_extras(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
+                                 &sshdr);
+        scmd_printk(KERN_INFO, cmd, "");
+        scsi_show_extd_sense(sshdr.asc, sshdr.ascq);
 }
-EXPORT_SYMBOL(scsi_print_command);
+EXPORT_SYMBOL(scsi_print_sense);
 
 #ifdef CONFIG_SCSI_CONSTANTS
 
@@ -1327,25 +1353,6 @@ static const char * const hostbyte_table[]={
 "DID_PASSTHROUGH", "DID_SOFT_ERROR", "DID_IMM_RETRY"};
 #define NUM_HOSTBYTE_STRS ARRAY_SIZE(hostbyte_table)
 
-void scsi_print_hostbyte(int scsiresult)
-{
-        int hb = host_byte(scsiresult);
-
-        printk("Hostbyte=0x%02x", hb);
-        if (hb < NUM_HOSTBYTE_STRS)
-                printk("(%s) ", hostbyte_table[hb]);
-        else
-                printk("is invalid ");
-}
-#else
-void scsi_print_hostbyte(int scsiresult)
-{
-        printk("Hostbyte=0x%02x ", host_byte(scsiresult));
-}
-#endif
-
-#ifdef CONFIG_SCSI_CONSTANTS
-
 static const char * const driverbyte_table[]={
 "DRIVER_OK", "DRIVER_BUSY", "DRIVER_SOFT",  "DRIVER_MEDIA", "DRIVER_ERROR",
 "DRIVER_INVALID", "DRIVER_TIMEOUT", "DRIVER_HARD", "DRIVER_SENSE"};
@@ -1356,19 +1363,35 @@ static const char * const driversuggest_table[]={"SUGGEST_OK",
 "SUGGEST_5", "SUGGEST_6", "SUGGEST_7", "SUGGEST_SENSE"};
 #define NUM_SUGGEST_STRS ARRAY_SIZE(driversuggest_table)
 
-void scsi_print_driverbyte(int scsiresult)
+void scsi_show_result(int result)
 {
-        int dr = (driver_byte(scsiresult) & DRIVER_MASK);
-        int su = ((driver_byte(scsiresult) & SUGGEST_MASK) >> 4);
+        int hb = host_byte(result);
+        int db = (driver_byte(result) & DRIVER_MASK);
+        int su = ((driver_byte(result) & SUGGEST_MASK) >> 4);
 
-        printk("Driverbyte=0x%02x ", driver_byte(scsiresult));
-        printk("(%s,%s) ",
-               (dr < NUM_DRIVERBYTE_STRS ? driverbyte_table[dr] : "invalid"),
+        printk("Result: hostbyte=%s driverbyte=%s,%s\n",
+               (hb < NUM_HOSTBYTE_STRS ? hostbyte_table[hb]     : "invalid"),
+               (db < NUM_DRIVERBYTE_STRS ? driverbyte_table[db] : "invalid"),
                (su < NUM_SUGGEST_STRS ? driversuggest_table[su] : "invalid"));
 }
+
 #else
-void scsi_print_driverbyte(int scsiresult)
+
+void scsi_show_result(int result)
 {
-        printk("Driverbyte=0x%02x ", driver_byte(scsiresult));
+        printk("Result: hostbyte=0x%02x driverbyte=0x%02x\n",
+               host_byte(result), driver_byte(result));
 }
+
 #endif
+EXPORT_SYMBOL(scsi_show_result);
+
+
+void scsi_print_result(struct scsi_cmnd *cmd)
+{
+        scmd_printk(KERN_INFO, cmd, "");
+        scsi_show_result(cmd->result);
+}
+EXPORT_SYMBOL(scsi_print_result);
+
+