/* * 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 * * generic_proc_info() support of xxxx_info() by: * Michael A. Griffith */ #include /* for CONFIG_PROC_FS */ #define __NO_VERSION__ #include #include #include #include #include #include #include #include #include #include "scsi.h" #include "hosts.h" #ifndef TRUE #define TRUE 1 #define FALSE 0 #endif #ifdef CONFIG_PROC_FS /* 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, const char *(*info) (struct Scsi_Host *), struct Scsi_Host *sh) { int len, pos, begin; begin = 0; if (info && sh) { pos = len = sprintf(buffer, "%s\n", info(sh)); } else { 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 */ static int proc_scsi_read(char *buffer, char **start, off_t offset, int length, int *eof, void *data) { struct Scsi_Host *hpnt = data; int n; if (hpnt->hostt->proc_info == NULL) n = generic_proc_info(buffer, start, offset, length, hpnt->hostt->info, hpnt); else n = (hpnt->hostt->proc_info(buffer, start, offset, length, hpnt->host_no, 0)); *eof = (nhostt->proc_info == NULL) ret = -ENOSYS; if (count > PROC_BLOCK_SIZE) return -EOVERFLOW; if (!(page = (char *) __get_free_page(GFP_KERNEL))) return -ENOMEM; if(copy_from_user(page, buf, count)) { free_page((ulong) page); return -EFAULT; } ret = hpnt->hostt->proc_info(page, &start, 0, count, hpnt->host_no, 1); free_page((ulong) page); return(ret); } void build_proc_dir_entries(Scsi_Host_Template * tpnt) { struct Scsi_Host *hpnt; char name[10]; /* see scsi_unregister_host() */ tpnt->proc_dir = proc_mkdir(tpnt->proc_name, proc_scsi); if (!tpnt->proc_dir) { printk(KERN_ERR "Unable to proc_mkdir in scsi.c/build_proc_dir_entries"); return; } tpnt->proc_dir->owner = tpnt->module; hpnt = scsi_hostlist; while (hpnt) { if (tpnt == hpnt->hostt) { struct proc_dir_entry *p; sprintf(name,"%d",hpnt->host_no); p = create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR, tpnt->proc_dir, proc_scsi_read, (void *)hpnt); if (!p) panic("Not enough memory to register SCSI HBA in /proc/scsi !\n"); p->write_proc=proc_scsi_write; p->owner = tpnt->module; } 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; handle = (parseHandle *) kmalloc(sizeof(parseHandle), GFP_KERNEL); if (!handle) return NULL; /* out of memory */ handle->cmdPos = (char **) kmalloc(sizeof(int) * cmdNum, GFP_KERNEL); if (!handle->cmdPos) { 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); } void proc_print_scsidevice(Scsi_Device * scd, char *buffer, int *size, int len) { int x, y = *size; extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE]; 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_device_types[(int) scd->type] : "Unknown "); y += sprintf(buffer + len + y, " ANSI" " SCSI revision: %02x", (scd->scsi_level - 1) ? scd->scsi_level - 1 : 1); if (scd->scsi_level == 2) y += sprintf(buffer + len + y, " CCS\n"); else y += sprintf(buffer + len + y, "\n"); *size = y; return; } #else /* if !CONFIG_PROC_FS */ void proc_print_scsidevice(Scsi_Device * scd, char *buffer, int *size, int len) { } #endif /* CONFIG_PROC_FS */ /* * 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: */