diff options
Diffstat (limited to 'src/extras/scsi_id/scsi_serial.c')
| -rw-r--r-- | src/extras/scsi_id/scsi_serial.c | 990 |
1 files changed, 990 insertions, 0 deletions
diff --git a/src/extras/scsi_id/scsi_serial.c b/src/extras/scsi_id/scsi_serial.c new file mode 100644 index 0000000000..61ec618e99 --- /dev/null +++ b/src/extras/scsi_id/scsi_serial.c @@ -0,0 +1,990 @@ +/* + * Copyright (C) IBM Corp. 2003 + * + * Author: Patrick Mansfield<patmans@us.ibm.com> + * + * 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, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <sys/types.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <stdio.h> +#include <errno.h> +#include <string.h> +#include <fcntl.h> +#include <stdlib.h> +#include <unistd.h> +#include <syslog.h> +#include <time.h> +#include <inttypes.h> +#include <scsi/scsi.h> +#include <scsi/sg.h> +#include <linux/types.h> +#include <linux/bsg.h> + +#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_TGTGROUP, SCSI_ID_NAA_DONT_CARE, SCSI_ID_BINARY }, + { 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 do_scsi_page80_inquiry(struct udev *udev, + struct scsi_id_device *dev_scsi, int fd, + char *serial, char *serial_short, int max_len); + +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; + struct sg_io_v4 io_v4; + struct sg_io_hdr io_hdr; + int retry = 3; /* rather random */ + int retval; + + 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) { + 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 { + 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, char *wwn, + char *wwn_vendor_extension, char *tgpt_group) +{ + int i, j, s, len; + + /* + * ASSOCIATION must be with the device (value 0) + * or with the target port for SCSI_ID_TGTPORT + */ + if ((page_83[1] & 0x30) == 0x10) { + if (id_search->id_type != SCSI_ID_TGTGROUP) + return 1; + } else 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; + } + + if (id_search->id_type == SCSI_ID_TGTGROUP && tgpt_group != NULL) { + unsigned int group; + + group = ((unsigned int)page_83[6] << 8) | page_83[7]; + sprintf(tgpt_group,"%x", group); + 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]); + + if (id_search->id_type == SCSI_ID_NAA && wwn != NULL) { + strncpy(wwn, &serial[s], 16); + if (wwn_vendor_extension != NULL) { + strncpy(wwn_vendor_extension, &serial[s + 16], 16); + } + } + + 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, + char *unit_serial_number, char *wwn, + char *wwn_vendor_extension, char *tgpt_group) +{ + int retval; + unsigned int id_ind, j; + unsigned char page_83[SCSI_INQ_BUFF_LEN]; + + /* also pick up the page 80 serial number */ + do_scsi_page80_inquiry(udev, dev_scsi, fd, NULL, unit_serial_number, MAX_SERIAL_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 - since WWN ids + * come first we can pick up the WWN in check_fill_0x83_id(). + */ + 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, + wwn, wwn_vendor_extension, + tgpt_group); + 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. + */ + len = buf[3]; + if (serial != NULL) { + serial[0] = 'S'; + ser_ind = prepend_vendor_model(udev, dev_scsi, &serial[1]); + if (ser_ind < 0) + return 1; + for (i = 4; i < len + 4; i++, ser_ind++) + serial[ser_ind] = buf[i]; + } + if (serial_short != NULL) { + 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; + int ind; + int retval; + + memset(dev_scsi->serial, 0, len); + dbg(udev, "opening %s\n", devname); + srand((unsigned int)getpid()); + for (cnt = 20; cnt > 0; cnt--) { + struct timespec duration; + + fd = open(devname, O_RDONLY | O_NONBLOCK); + if (fd >= 0 || errno != EBUSY) + break; + duration.tv_sec = 0; + duration.tv_nsec = (200 * 1000 * 1000) + (rand() % 100 * 1000 * 1000); + 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, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) { + 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, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) { + 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, dev_scsi->unit_serial_number, dev_scsi->wwn, dev_scsi->wwn_vendor_extension, dev_scsi->tgpt_group)) { + /* + * 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; +} |