/* * linux/drivers/scsi/scsi_proc.c * * The functions in this file provide an interface between * the PROC file system and the SCSI device drivers * It is mainly used for debugging, statistics and to pass * information directly to the lowlevel driver. * * (c) 1995 Michael Neuffer neuffer@goofy.zdv.uni-mainz.de * Version: 0.99.8 last change: 95/09/13 * * generic command parser provided by: * Andreas Heilwagen */ /* * Don't import our own symbols, as this would severely mess up our * symbol tables. */ #define _SCSI_SYMS_VER_ #define __NO_VERSION__ #include #include #include #include #include #include #include #include #include "scsi.h" #include "hosts.h" #ifndef TRUE #define TRUE 1 #define FALSE 0 #endif extern int scsi_proc_info(char *, char **, off_t, int, int, int); struct scsi_dir { struct proc_dir_entry entry; char name[4]; }; /* generic_proc_info * Used if the driver currently has no own support for /proc/scsi */ int generic_proc_info(char *buffer, char **start, off_t offset, int length, int inode, int inout) { int len, pos, begin; if(inout == TRUE) return(-ENOSYS); /* This is a no-op */ begin = 0; pos = len = sprintf(buffer, "The driver does not yet support the proc-fs\n"); if(pos < offset) { len = 0; begin = pos; } *start = buffer + (offset - begin); /* Start of wanted data */ len -= (offset - begin); if(len > length) len = length; return(len); } /* dispatch_scsi_info is the central dispatcher * It is the interface between the proc-fs and the SCSI subsystem code */ extern int dispatch_scsi_info(int ino, char *buffer, char **start, off_t offset, int length, int func) { struct Scsi_Host *hpnt = scsi_hostlist; if(ino == PROC_SCSI_SCSI) { /* * This is for the scsi core, rather than any specific * lowlevel driver. */ return(scsi_proc_info(buffer, start, offset, length, 0, func)); } while(hpnt) { if (ino == (hpnt->host_no + PROC_SCSI_FILE)) { if(hpnt->hostt->proc_info == NULL) return generic_proc_info(buffer, start, offset, length, hpnt->host_no, func); else return(hpnt->hostt->proc_info(buffer, start, offset, length, hpnt->host_no, func)); } hpnt = hpnt->next; } return(-EBADF); } void build_proc_dir_entries(Scsi_Host_Template *tpnt) { struct Scsi_Host *hpnt; struct scsi_dir *scsi_hba_dir; proc_scsi_register(0, tpnt->proc_dir); hpnt = scsi_hostlist; while (hpnt) { if (tpnt == hpnt->hostt) { scsi_hba_dir = scsi_init_malloc(sizeof(struct scsi_dir), GFP_KERNEL); if(scsi_hba_dir == NULL) panic("Not enough memory to register SCSI HBA in /proc/scsi !\n"); memset(scsi_hba_dir, 0, sizeof(struct scsi_dir)); scsi_hba_dir->entry.low_ino = PROC_SCSI_FILE + hpnt->host_no; scsi_hba_dir->entry.namelen = sprintf(scsi_hba_dir->name,"%d", hpnt->host_no); scsi_hba_dir->entry.name = scsi_hba_dir->name; scsi_hba_dir->entry.mode = S_IFREG | S_IRUGO | S_IWUSR; proc_scsi_register(tpnt->proc_dir, &scsi_hba_dir->entry); } hpnt = hpnt->next; } } /* * parseHandle *parseInit(char *buf, char *cmdList, int cmdNum); * gets a pointer to a null terminated data buffer * and a list of commands with blanks as delimiter * in between. * The commands have to be alphanumerically sorted. * cmdNum has to contain the number of commands. * On success, a pointer to a handle structure * is returned, NULL on failure * * int parseOpt(parseHandle *handle, char **param); * processes the next parameter. On success, the * index of the appropriate command in the cmdList * is returned, starting with zero. * param points to the null terminated parameter string. * On failure, -1 is returned. * * The databuffer buf may only contain pairs of commands * options, separated by blanks: * [ ]* */ typedef struct { char *buf, /* command buffer */ *cmdList, /* command list */ *bufPos, /* actual position */ **cmdPos, /* cmdList index */ cmdNum; /* cmd number */ } parseHandle; inline int parseFree (parseHandle *handle) /* free memory */ { kfree (handle->cmdPos); kfree (handle); return(-1); } parseHandle *parseInit(char *buf, char *cmdList, int cmdNum) { char *ptr; /* temp pointer */ parseHandle *handle; /* new handle */ if (!buf || !cmdList) /* bad input ? */ return(NULL); if ((handle = (parseHandle*) kmalloc(sizeof(parseHandle), 1)) == 0) return(NULL); /* out of memory */ if ((handle->cmdPos = (char**) kmalloc(sizeof(int), cmdNum)) == 0) { kfree(handle); return(NULL); /* out of memory */ } handle->buf = handle->bufPos = buf; /* init handle */ handle->cmdList = cmdList; handle->cmdNum = cmdNum; handle->cmdPos[cmdNum = 0] = cmdList; for (ptr = cmdList; *ptr; ptr++) { /* scan command string */ if(*ptr == ' ') { /* and insert zeroes */ *ptr++ = 0; handle->cmdPos[++cmdNum] = ptr++; } } return(handle); } int parseOpt(parseHandle *handle, char **param) { int cmdIndex = 0, cmdLen = 0; char *startPos; if (!handle) /* invalid handle */ return(parseFree(handle)); /* skip spaces */ for (; *(handle->bufPos) && *(handle->bufPos) == ' '; handle->bufPos++); if (!*(handle->bufPos)) return(parseFree(handle)); /* end of data */ startPos = handle->bufPos; /* store cmd start */ for (; handle->cmdPos[cmdIndex][cmdLen] && *(handle->bufPos); handle->bufPos++) { /* no string end? */ for (;;) { if (*(handle->bufPos) == handle->cmdPos[cmdIndex][cmdLen]) break; /* char matches ? */ else if (memcmp(startPos, (char*)(handle->cmdPos[++cmdIndex]), cmdLen)) return(parseFree(handle)); /* unknown command */ if (cmdIndex >= handle->cmdNum) return(parseFree(handle)); /* unknown command */ } cmdLen++; /* next char */ } /* Get param. First skip all blanks, then insert zero after param */ for (; *(handle->bufPos) && *(handle->bufPos) == ' '; handle->bufPos++); *param = handle->bufPos; for (; *(handle->bufPos) && *(handle->bufPos) != ' '; handle->bufPos++); *(handle->bufPos++) = 0; return(cmdIndex); } #define MAX_SCSI_DEVICE_CODE 10 const char *const scsi_dev_types[MAX_SCSI_DEVICE_CODE] = { "Direct-Access ", "Sequential-Access", "Printer ", "Processor ", "WORM ", "CD-ROM ", "Scanner ", "Optical Device ", "Medium Changer ", "Communications " }; void proc_print_scsidevice(Scsi_Device *scd, char *buffer, int *size, int len) { int x, y = *size; y = sprintf(buffer + len, "Host: scsi%d Channel: %02d Id: %02d Lun: %02d\n Vendor: ", scd->host->host_no, scd->channel, scd->id, scd->lun); for (x = 0; x < 8; x++) { if (scd->vendor[x] >= 0x20) y += sprintf(buffer + len + y, "%c", scd->vendor[x]); else y += sprintf(buffer + len + y," "); } y += sprintf(buffer + len + y, " Model: "); for (x = 0; x < 16; x++) { if (scd->model[x] >= 0x20) y += sprintf(buffer + len + y, "%c", scd->model[x]); else y += sprintf(buffer + len + y, " "); } y += sprintf(buffer + len + y, " Rev: "); for (x = 0; x < 4; x++) { if (scd->rev[x] >= 0x20) y += sprintf(buffer + len + y, "%c", scd->rev[x]); else y += sprintf(buffer + len + y, " "); } y += sprintf(buffer + len + y, "\n"); y += sprintf(buffer + len + y, " Type: %s ", scd->type < MAX_SCSI_DEVICE_CODE ? scsi_dev_types[(int)scd->type] : "Unknown " ); y += sprintf(buffer + len + y, " ANSI" " SCSI revision: %02x", (scd->scsi_level < 3)?1:2); if (scd->scsi_level == 2) y += sprintf(buffer + len + y, " CCS\n"); else y += sprintf(buffer + len + y, "\n"); *size = y; return; } /* * Overrides for Emacs so that we get a uniform tabbing style. * Emacs will notice this stuff at the end of the file and automatically * adjust the settings for this buffer only. This must remain at the end * of the file. * --------------------------------------------------------------------------- * Local variables: * c-indent-level: 4 * c-brace-imaginary-offset: 0 * c-brace-offset: -4 * c-argdecl-indent: 4 * c-label-offset: -4 * c-continued-statement-offset: 4 * c-continued-brace-offset: 0 * indent-tabs-mode: nil * tab-width: 8 * End: */