/* * scsi_serial.c * * Code related to requesting and getting an id from a scsi device * * Copyright (C) IBM Corp. 2003 * * Author: * Patrick Mansfield * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation version 2 of the License. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "libudev.h" #include "libudev-private.h" #include "scsi.h" #include "scsi_id.h" /* * A priority based list of id, naa, and binary/ascii for the identifier * descriptor in VPD page 0x83. * * Brute force search for a match starting with the first value in the * following id_search_list. This is not a performance issue, since there * is normally one or some small number of descriptors. */ static const struct scsi_id_search_values id_search_list[] = { { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_BINARY }, { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG_EXTENDED, SCSI_ID_ASCII }, { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_BINARY }, { SCSI_ID_NAA, SCSI_ID_NAA_IEEE_REG, SCSI_ID_ASCII }, /* * Devices already exist using NAA values that are now marked * reserved. These should not conflict with other values, or it is * a bug in the device. As long as we find the IEEE extended one * first, we really don't care what other ones are used. Using * don't care here means that a device that returns multiple * non-IEEE descriptors in a random order will get different * names. */ { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY }, { SCSI_ID_NAA, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII }, { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY }, { SCSI_ID_EUI_64, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII }, { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY }, { SCSI_ID_T10_VENDOR, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII }, { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY }, { SCSI_ID_VENDOR_SPECIFIC, SCSI_ID_NAA_DONT_CARE, SCSI_ID_ASCII }, }; static const char hex_str[]="0123456789abcdef"; /* * Values returned in the result/status, only the ones used by the code * are used here. */ #define DID_NO_CONNECT 0x01 /* Unable to connect before timeout */ #define DID_BUS_BUSY 0x02 /* Bus remain busy until timeout */ #define DID_TIME_OUT 0x03 /* Timed out for some other reason */ #define DRIVER_TIMEOUT 0x06 #define DRIVER_SENSE 0x08 /* Sense_buffer has been set */ /* The following "category" function returns one of the following */ #define SG_ERR_CAT_CLEAN 0 /* No errors or other information */ #define SG_ERR_CAT_MEDIA_CHANGED 1 /* interpreted from sense buffer */ #define SG_ERR_CAT_RESET 2 /* interpreted from sense buffer */ #define SG_ERR_CAT_TIMEOUT 3 #define SG_ERR_CAT_RECOVERED 4 /* Successful command after recovered err */ #define SG_ERR_CAT_NOTSUPPORTED 5 /* Illegal / unsupported command */ #define SG_ERR_CAT_SENSE 98 /* Something else in the sense buffer */ #define SG_ERR_CAT_OTHER 99 /* Some other error/warning */ static int sg_err_category_new(struct udev *udev, int scsi_status, int msg_status, int host_status, int driver_status, const unsigned char *sense_buffer, int sb_len) { scsi_status &= 0x7e; /* * XXX change to return only two values - failed or OK. */ if (!scsi_status && !host_status && !driver_status) return SG_ERR_CAT_CLEAN; if ((scsi_status == SCSI_CHECK_CONDITION) || (scsi_status == SCSI_COMMAND_TERMINATED) || ((driver_status & 0xf) == DRIVER_SENSE)) { if (sense_buffer && (sb_len > 2)) { int sense_key; unsigned char asc; if (sense_buffer[0] & 0x2) { sense_key = sense_buffer[1] & 0xf; asc = sense_buffer[2]; } else { sense_key = sense_buffer[2] & 0xf; asc = (sb_len > 12) ? sense_buffer[12] : 0; } if (sense_key == RECOVERED_ERROR) return SG_ERR_CAT_RECOVERED; else if (sense_key == UNIT_ATTENTION) { if (0x28 == asc) return SG_ERR_CAT_MEDIA_CHANGED; if (0x29 == asc) return SG_ERR_CAT_RESET; } else if (sense_key == ILLEGAL_REQUEST) { return SG_ERR_CAT_NOTSUPPORTED; } } return SG_ERR_CAT_SENSE; } if (!host_status) { if ((host_status == DID_NO_CONNECT) || (host_status == DID_BUS_BUSY) || (host_status == DID_TIME_OUT)) return SG_ERR_CAT_TIMEOUT; } if (!driver_status) { if (driver_status == DRIVER_TIMEOUT) return SG_ERR_CAT_TIMEOUT; } return SG_ERR_CAT_OTHER; } static int sg_err_category3(struct udev *udev, struct sg_io_hdr *hp) { return sg_err_category_new(udev, hp->status, hp->msg_status, hp->host_status, hp->driver_status, hp->sbp, hp->sb_len_wr); } static int sg_err_category4(struct udev *udev, struct sg_io_v4 *hp) { return sg_err_category_new(udev, hp->device_status, 0, hp->transport_status, hp->driver_status, (unsigned char *)(uintptr_t)hp->response, hp->response_len); } static int scsi_dump_sense(struct udev *udev, struct scsi_id_device *dev_scsi, unsigned char *sense_buffer, int sb_len) { int s; int code; int sense_class; int sense_key; int asc, ascq; #ifdef DUMP_SENSE char out_buffer[256]; int i, j; #endif /* * Figure out and print the sense key, asc and ascq. * * If you want to suppress these for a particular drive model, add * a black list entry in the scsi_id config file. * * XXX We probably need to: lookup the sense/asc/ascq in a retry * table, and if found return 1 (after dumping the sense, asc, and * ascq). So, if/when we get something like a power on/reset, * we'll retry the command. */ dbg(udev, "got check condition\n"); if (sb_len < 1) { info(udev, "%s: sense buffer empty\n", dev_scsi->kernel); return -1; } sense_class = (sense_buffer[0] >> 4) & 0x07; code = sense_buffer[0] & 0xf; if (sense_class == 7) { /* * extended sense data. */ s = sense_buffer[7] + 8; if (sb_len < s) { info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n", dev_scsi->kernel, sb_len, s - sb_len); return -1; } if ((code == 0x0) || (code == 0x1)) { sense_key = sense_buffer[2] & 0xf; if (s < 14) { /* * Possible? */ info(udev, "%s: sense result too" " small %d bytes\n", dev_scsi->kernel, s); return -1; } asc = sense_buffer[12]; ascq = sense_buffer[13]; } else if ((code == 0x2) || (code == 0x3)) { sense_key = sense_buffer[1] & 0xf; asc = sense_buffer[2]; ascq = sense_buffer[3]; } else { info(udev, "%s: invalid sense code 0x%x\n", dev_scsi->kernel, code); return -1; } info(udev, "%s: sense key 0x%x ASC 0x%x ASCQ 0x%x\n", dev_scsi->kernel, sense_key, asc, ascq); } else { if (sb_len < 4) { info(udev, "%s: sense buffer too small %d bytes, %d bytes too short\n", dev_scsi->kernel, sb_len, 4 - sb_len); return -1; } if (sense_buffer[0] < 15) info(udev, "%s: old sense key: 0x%x\n", dev_scsi->kernel, sense_buffer[0] & 0x0f); else info(udev, "%s: sense = %2x %2x\n", dev_scsi->kernel, sense_buffer[0], sense_buffer[2]); info(udev, "%s: non-extended sense class %d code 0x%0x\n", dev_scsi->kernel, sense_class, code); } #ifdef DUMP_SENSE for (i = 0, j = 0; (i < s) && (j < 254); i++) { dbg(udev, "i %d, j %d\n", i, j); out_buffer[j++] = hex_str[(sense_buffer[i] & 0xf0) >> 4]; out_buffer[j++] = hex_str[sense_buffer[i] & 0x0f]; out_buffer[j++] = ' '; } out_buffer[j] = '\0'; info(udev, "%s: sense dump:\n", dev_scsi->kernel); info(udev, "%s: %s\n", dev_scsi->kernel, out_buffer); #endif return -1; } static int scsi_dump(struct udev *udev, struct scsi_id_device *dev_scsi, struct sg_io_hdr *io) { if (!io->status && !io->host_status && !io->msg_status && !io->driver_status) { /* * Impossible, should not be called. */ info(udev, "%s: called with no error\n", __FUNCTION__); return -1; } info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x\n", dev_scsi->kernel, io->driver_status, io->host_status, io->msg_status, io->status); if (io->status == SCSI_CHECK_CONDITION) return scsi_dump_sense(udev, dev_scsi, io->sbp, io->sb_len_wr); else return -1; } static int scsi_dump_v4(struct udev *udev, struct scsi_id_device *dev_scsi, struct sg_io_v4 *io) { if (!io->device_status && !io->transport_status && !io->driver_status) { /* * Impossible, should not be called. */ info(udev, "%s: called with no error\n", __FUNCTION__); return -1; } info(udev, "%s: sg_io failed status 0x%x 0x%x 0x%x\n", dev_scsi->kernel, io->driver_status, io->transport_status, io->device_status); if (io->device_status == SCSI_CHECK_CONDITION) return scsi_dump_sense(udev, dev_scsi, (unsigned char *)(uintptr_t)io->response, io->response_len); else return -1; } static int scsi_inquiry(struct udev *udev, struct scsi_id_device *dev_scsi, int fd, unsigned char evpd, unsigned char page, unsigned char *buf, unsigned int buflen) { unsigned char inq_cmd[INQUIRY_CMDLEN] = { INQUIRY_CMD, evpd, page, 0, buflen, 0 }; unsigned char sense[SENSE_BUFF_LEN]; void *io_buf; int retval; int retry = 3; /* rather random */ if (buflen > SCSI_INQ_BUFF_LEN) { info(udev, "buflen %d too long\n", buflen); return -1; } resend: dbg(udev, "%s evpd %d, page 0x%x\n", dev_scsi->kernel, evpd, page); if (dev_scsi->use_sg == 4) { struct sg_io_v4 io_v4; memset(&io_v4, 0, sizeof(struct sg_io_v4)); io_v4.guard = 'Q'; io_v4.protocol = BSG_PROTOCOL_SCSI; io_v4.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD; io_v4.request_len = sizeof(inq_cmd); io_v4.request = (uintptr_t)inq_cmd; io_v4.max_response_len = sizeof(sense); io_v4.response = (uintptr_t)sense; io_v4.din_xfer_len = buflen; io_v4.din_xferp = (uintptr_t)buf; io_buf = (void *)&io_v4; } else { struct sg_io_hdr io_hdr; memset(&io_hdr, 0, sizeof(struct sg_io_hdr)); io_hdr.interface_id = 'S'; io_hdr.cmd_len = sizeof(inq_cmd); io_hdr.mx_sb_len = sizeof(sense); io_hdr.dxfer_direction = SG_DXFER_FROM_DEV; io_hdr.dxfer_len = buflen; io_hdr.dxferp = buf; io_hdr.cmdp = inq_cmd; io_hdr.sbp = sense; io_hdr.timeout = DEF_TIMEOUT; io_buf = (void *)&io_hdr; } retval = ioctl(fd, SG_IO, io_buf); if (retval < 0) { if ((errno == EINVAL || errno == ENOSYS) && dev_scsi->use_sg == 4) { dev_scsi->use_sg = 3; goto resend; } info(udev, "%s: ioctl failed: %s\n", dev_scsi->kernel, strerror(errno)); goto error; } if (dev_scsi->use_sg == 4) retval = sg_err_category4(udev, io_buf); else retval = sg_err_category3(udev, io_buf); switch (retval) { case SG_ERR_CAT_NOTSUPPORTED: buf[1] = 0; /* Fallthrough */ case SG_ERR_CAT_CLEAN: case SG_ERR_CAT_RECOVERED: retval = 0; break; default: if (dev_scsi->use_sg == 4) retval = scsi_dump_v4(udev, dev_scsi, io_buf); else retval = scsi_dump(udev, dev_scsi, io_buf); } if (!retval) { retval = buflen; } else if (retval > 0) { if (--retry > 0) { dbg(udev, "%s: Retrying ...\n", dev_scsi->kernel); goto resend; } retval = -1; } error: if (retval < 0) info(udev, "%s: Unable to get INQUIRY vpd %d page 0x%x.\n", dev_scsi->kernel, evpd, page); return retval; } /* Get list of supported EVPD pages */ static int do_scsi_page0_inquiry(struct udev *udev, struct scsi_id_device *dev_scsi, int fd, unsigned char *buffer, unsigned int len) { int retval; memset(buffer, 0, len); retval = scsi_inquiry(udev, dev_scsi, fd, 1, 0x0, buffer, len); if (retval < 0) return 1; if (buffer[1] != 0) { info(udev, "%s: page 0 not available.\n", dev_scsi->kernel); return 1; } if (buffer[3] > len) { info(udev, "%s: page 0 buffer too long %d\n", dev_scsi->kernel, buffer[3]); return 1; } /* * Following check is based on code once included in the 2.5.x * kernel. * * Some ill behaved devices return the standard inquiry here * rather than the evpd data, snoop the data to verify. */ if (buffer[3] > MODEL_LENGTH) { /* * If the vendor id appears in the page assume the page is * invalid. */ if (!strncmp((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) { info(udev, "%s: invalid page0 data\n", dev_scsi->kernel); return 1; } } return 0; } /* * The caller checks that serial is long enough to include the vendor + * model. */ static int prepend_vendor_model(struct udev *udev, struct scsi_id_device *dev_scsi, char *serial) { int ind; strncpy(serial, dev_scsi->vendor, VENDOR_LENGTH); strncat(serial, dev_scsi->model, MODEL_LENGTH); ind = strlen(serial); /* * This is not a complete check, since we are using strncat/cpy * above, ind will never be too large. */ if (ind != (VENDOR_LENGTH + MODEL_LENGTH)) { info(udev, "%s: expected length %d, got length %d\n", dev_scsi->kernel, (VENDOR_LENGTH + MODEL_LENGTH), ind); return -1; } return ind; } /** * check_fill_0x83_id - check the page 0x83 id, if OK allocate and fill * serial number. **/ static int check_fill_0x83_id(struct udev *udev, struct scsi_id_device *dev_scsi, unsigned char *page_83, const struct scsi_id_search_values *id_search, char *serial, char *serial_short, int max_len) { int i, j, s, len; /* * ASSOCIATION must be with the device (value 0) */ if ((page_83[1] & 0x30) != 0) return 1; if ((page_83[1] & 0x0f) != id_search->id_type) return 1; /* * Possibly check NAA sub-type. */ if ((id_search->naa_type != SCSI_ID_NAA_DONT_CARE) && (id_search->naa_type != (page_83[4] & 0xf0) >> 4)) return 1; /* * Check for matching code set - ASCII or BINARY. */ if ((page_83[0] & 0x0f) != id_search->code_set) return 1; /* * page_83[3]: identifier length */ len = page_83[3]; if ((page_83[0] & 0x0f) != SCSI_ID_ASCII) /* * If not ASCII, use two bytes for each binary value. */ len *= 2; /* * Add one byte for the NUL termination, and one for the id_type. */ len += 2; if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC) len += VENDOR_LENGTH + MODEL_LENGTH; if (max_len < len) { info(udev, "%s: length %d too short - need %d\n", dev_scsi->kernel, max_len, len); return 1; } serial[0] = hex_str[id_search->id_type]; /* * For SCSI_ID_VENDOR_SPECIFIC prepend the vendor and model before * the id since it is not unique across all vendors and models, * this differs from SCSI_ID_T10_VENDOR, where the vendor is * included in the identifier. */ if (id_search->id_type == SCSI_ID_VENDOR_SPECIFIC) if (prepend_vendor_model(udev, dev_scsi, &serial[1]) < 0) { dbg(udev, "prepend failed\n"); return 1; } i = 4; /* offset to the start of the identifier */ s = j = strlen(serial); if ((page_83[0] & 0x0f) == SCSI_ID_ASCII) { /* * ASCII descriptor. */ while (i < (4 + page_83[3])) serial[j++] = page_83[i++]; } else { /* * Binary descriptor, convert to ASCII, using two bytes of * ASCII for each byte in the page_83. */ while (i < (4 + page_83[3])) { serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4]; serial[j++] = hex_str[page_83[i] & 0x0f]; i++; } } strcpy(serial_short, &serial[s]); return 0; } /* Extract the raw binary from VPD 0x83 pre-SPC devices */ static int check_fill_0x83_prespc3(struct udev *udev, struct scsi_id_device *dev_scsi, unsigned char *page_83, const struct scsi_id_search_values *id_search, char *serial, char *serial_short, int max_len) { int i, j; dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel); serial[0] = hex_str[id_search->id_type]; /* serial has been memset to zero before */ j = strlen(serial); /* j = 1; */ for (i = 0; (i < page_83[3]) && (j < max_len-3); ++i) { serial[j++] = hex_str[(page_83[4+i] & 0xf0) >> 4]; serial[j++] = hex_str[ page_83[4+i] & 0x0f]; } serial[max_len-1] = 0; strncpy(serial_short, serial, max_len-1); return 0; } /* Get device identification VPD page */ static int do_scsi_page83_inquiry(struct udev *udev, struct scsi_id_device *dev_scsi, int fd, char *serial, char *serial_short, int len) { int retval; unsigned int id_ind, j; unsigned char page_83[SCSI_INQ_BUFF_LEN]; memset(page_83, 0, SCSI_INQ_BUFF_LEN); retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN); if (retval < 0) return 1; if (page_83[1] != PAGE_83) { info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel); return 1; } /* * XXX Some devices (IBM 3542) return all spaces for an identifier if * the LUN is not actually configured. This leads to identifiers of * the form: "1 ". */ /* * Model 4, 5, and (some) model 6 EMC Symmetrix devices return * a page 83 reply according to SCSI-2 format instead of SPC-2/3. * * The SCSI-2 page 83 format returns an IEEE WWN in binary * encoded hexi-decimal in the 16 bytes following the initial * 4-byte page 83 reply header. * * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part * of an Identification descriptor. The 3rd byte of the first * Identification descriptor is a reserved (BSZ) byte field. * * Reference the 7th byte of the page 83 reply to determine * whether the reply is compliant with SCSI-2 or SPC-2/3 * specifications. A zero value in the 7th byte indicates * an SPC-2/3 conformant reply, (i.e., the reserved field of the * first Identification descriptor). This byte will be non-zero * for a SCSI-2 conformant page 83 reply from these EMC * Symmetrix models since the 7th byte of the reply corresponds * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is, * 0x006048. */ if (page_83[6] != 0) return check_fill_0x83_prespc3(udev, dev_scsi, page_83, id_search_list, serial, serial_short, len); /* * Search for a match in the prioritized id_search_list. */ for (id_ind = 0; id_ind < sizeof(id_search_list)/sizeof(id_search_list[0]); id_ind++) { /* * Examine each descriptor returned. There is normally only * one or a small number of descriptors. */ for (j = 4; j <= (unsigned int)page_83[3] + 3; j += page_83[j + 3] + 4) { retval = check_fill_0x83_id(udev, dev_scsi, &page_83[j], &id_search_list[id_ind], serial, serial_short, len); dbg(udev, "%s id desc %d/%d/%d\n", dev_scsi->kernel, id_search_list[id_ind].id_type, id_search_list[id_ind].naa_type, id_search_list[id_ind].code_set); if (!retval) { dbg(udev, " used\n"); return retval; } else if (retval < 0) { dbg(udev, " failed\n"); return retval; } else { dbg(udev, " not used\n"); } } } return 1; } /* * Get device identification VPD page for older SCSI-2 device which is not * compliant with either SPC-2 or SPC-3 format. * * Return the hard coded error code value 2 if the page 83 reply is not * conformant to the SCSI-2 format. */ static int do_scsi_page83_prespc3_inquiry(struct udev *udev, struct scsi_id_device *dev_scsi, int fd, char *serial, char *serial_short, int len) { int retval; int i, j; unsigned char page_83[SCSI_INQ_BUFF_LEN]; memset(page_83, 0, SCSI_INQ_BUFF_LEN); retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_83, page_83, SCSI_INQ_BUFF_LEN); if (retval < 0) return 1; if (page_83[1] != PAGE_83) { info(udev, "%s: Invalid page 0x83\n", dev_scsi->kernel); return 1; } /* * Model 4, 5, and (some) model 6 EMC Symmetrix devices return * a page 83 reply according to SCSI-2 format instead of SPC-2/3. * * The SCSI-2 page 83 format returns an IEEE WWN in binary * encoded hexi-decimal in the 16 bytes following the initial * 4-byte page 83 reply header. * * Both the SPC-2 and SPC-3 formats return an IEEE WWN as part * of an Identification descriptor. The 3rd byte of the first * Identification descriptor is a reserved (BSZ) byte field. * * Reference the 7th byte of the page 83 reply to determine * whether the reply is compliant with SCSI-2 or SPC-2/3 * specifications. A zero value in the 7th byte indicates * an SPC-2/3 conformant reply, (i.e., the reserved field of the * first Identification descriptor). This byte will be non-zero * for a SCSI-2 conformant page 83 reply from these EMC * Symmetrix models since the 7th byte of the reply corresponds * to the 4th and 5th nibbles of the 6-byte OUI for EMC, that is, * 0x006048. */ if (page_83[6] == 0) return 2; serial[0] = hex_str[id_search_list[0].id_type]; /* * The first four bytes contain data, not a descriptor. */ i = 4; j = strlen(serial); /* * Binary descriptor, convert to ASCII, * using two bytes of ASCII for each byte * in the page_83. */ while (i < (page_83[3]+4)) { serial[j++] = hex_str[(page_83[i] & 0xf0) >> 4]; serial[j++] = hex_str[page_83[i] & 0x0f]; i++; } dbg(udev, "using pre-spc3-83 for %s\n", dev_scsi->kernel); return 0; } /* Get unit serial number VPD page */ static int do_scsi_page80_inquiry(struct udev *udev, struct scsi_id_device *dev_scsi, int fd, char *serial, char *serial_short, int max_len) { int retval; int ser_ind; int i; int len; unsigned char buf[SCSI_INQ_BUFF_LEN]; memset(buf, 0, SCSI_INQ_BUFF_LEN); retval = scsi_inquiry(udev, dev_scsi, fd, 1, PAGE_80, buf, SCSI_INQ_BUFF_LEN); if (retval < 0) return retval; if (buf[1] != PAGE_80) { info(udev, "%s: Invalid page 0x80\n", dev_scsi->kernel); return 1; } len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3]; if (max_len < len) { info(udev, "%s: length %d too short - need %d\n", dev_scsi->kernel, max_len, len); return 1; } /* * Prepend 'S' to avoid unlikely collision with page 0x83 vendor * specific type where we prepend '0' + vendor + model. */ serial[0] = 'S'; ser_ind = prepend_vendor_model(udev, dev_scsi, &serial[1]); if (ser_ind < 0) return 1; len = buf[3]; for (i = 4; i < len + 4; i++, ser_ind++) serial[ser_ind] = buf[i]; memcpy(serial_short, &buf[4], len); serial_short[len] = '\0'; return 0; } int scsi_std_inquiry(struct udev *udev, struct scsi_id_device *dev_scsi, const char *devname) { int fd; unsigned char buf[SCSI_INQ_BUFF_LEN]; struct stat statbuf; int err = 0; dbg(udev, "opening %s\n", devname); fd = open(devname, O_RDONLY | O_NONBLOCK); if (fd < 0) { info(udev, "scsi_id: cannot open %s: %s\n", devname, strerror(errno)); return 1; } if (fstat(fd, &statbuf) < 0) { info(udev, "scsi_id: cannot stat %s: %s\n", devname, strerror(errno)); err = 2; goto out; } sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev), minor(statbuf.st_rdev)); memset(buf, 0, SCSI_INQ_BUFF_LEN); err = scsi_inquiry(udev, dev_scsi, fd, 0, 0, buf, SCSI_INQ_BUFF_LEN); if (err < 0) goto out; err = 0; memcpy(dev_scsi->vendor, buf + 8, 8); dev_scsi->vendor[8] = '\0'; memcpy(dev_scsi->model, buf + 16, 16); dev_scsi->model[16] = '\0'; memcpy(dev_scsi->revision, buf + 32, 4); dev_scsi->revision[4] = '\0'; sprintf(dev_scsi->type,"%x", buf[0] & 0x1f); out: close(fd); return err; } int scsi_get_serial(struct udev *udev, struct scsi_id_device *dev_scsi, const char *devname, int page_code, int len) { unsigned char page0[SCSI_INQ_BUFF_LEN]; int fd = -1; int cnt = 10; int ind; int retval; memset(dev_scsi->serial, 0, len); dbg(udev, "opening %s\n", devname); while (--cnt) { const struct timespec duration = { 0, 500 * 1000 * 1000 }; fd = open(devname, O_RDONLY | O_NONBLOCK); if (fd >= 0) break; info(udev, "%s: cannot open %s: %s\n", dev_scsi->kernel, devname, strerror(errno)); if (errno != EBUSY) break; nanosleep(&duration, NULL); } if (fd < 0) return 1; if (page_code == PAGE_80) { if (do_scsi_page80_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) { retval = 1; goto completed; } else { retval = 0; goto completed; } } else if (page_code == PAGE_83) { if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) { retval = 1; goto completed; } else { retval = 0; goto completed; } } else if (page_code == PAGE_83_PRE_SPC3) { retval = do_scsi_page83_prespc3_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len); if (retval) { /* * Fallback to servicing a SPC-2/3 compliant page 83 * inquiry if the page 83 reply format does not * conform to pre-SPC3 expectations. */ if (retval == 2) { if (do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) { retval = 1; goto completed; } else { retval = 0; goto completed; } } else { retval = 1; goto completed; } } else { retval = 0; goto completed; } } else if (page_code != 0x00) { info(udev, "%s: unsupported page code 0x%d\n", dev_scsi->kernel, page_code); return 1; } /* * Get page 0, the page of the pages. By default, try from best to * worst of supported pages: 0x83 then 0x80. */ if (do_scsi_page0_inquiry(udev, dev_scsi, fd, page0, SCSI_INQ_BUFF_LEN)) { /* * Don't try anything else. Black list if a specific page * should be used for this vendor+model, or maybe have an * optional fall-back to page 0x80 or page 0x83. */ retval = 1; goto completed; } dbg(udev, "%s: Checking page0\n", dev_scsi->kernel); for (ind = 4; ind <= page0[3] + 3; ind++) if (page0[ind] == PAGE_83) if (!do_scsi_page83_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) { /* * Success */ retval = 0; goto completed; } for (ind = 4; ind <= page0[3] + 3; ind++) if (page0[ind] == PAGE_80) if (!do_scsi_page80_inquiry(udev, dev_scsi, fd, dev_scsi->serial, dev_scsi->serial_short, len)) { /* * Success */ retval = 0; goto completed; } retval = 1; completed: close(fd); return retval; }