| /* |
| * 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 <errno.h> |
| #include <fcntl.h> |
| #include <inttypes.h> |
| #include <linux/bsg.h> |
| #include <linux/types.h> |
| #include <scsi/scsi.h> |
| #include <scsi/sg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/ioctl.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include "libudev.h" |
| |
| #include "libudev-private.h" |
| #include "random-util.h" |
| #include "scsi.h" |
| #include "scsi_id.h" |
| #include "string-util.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. |
| */ |
| |
| if (sb_len < 1) { |
| log_debug("%s: sense buffer empty", 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) { |
| log_debug("%s: sense buffer too small %d bytes, %d bytes too short", |
| 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? |
| */ |
| log_debug("%s: sense result too" " small %d bytes", |
| 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 { |
| log_debug("%s: invalid sense code 0x%x", |
| dev_scsi->kernel, code); |
| return -1; |
| } |
| log_debug("%s: sense key 0x%x ASC 0x%x ASCQ 0x%x", |
| dev_scsi->kernel, sense_key, asc, ascq); |
| } else { |
| if (sb_len < 4) { |
| log_debug("%s: sense buffer too small %d bytes, %d bytes too short", |
| dev_scsi->kernel, sb_len, 4 - sb_len); |
| return -1; |
| } |
| |
| if (sense_buffer[0] < 15) |
| log_debug("%s: old sense key: 0x%x", dev_scsi->kernel, sense_buffer[0] & 0x0f); |
| else |
| log_debug("%s: sense = %2x %2x", |
| dev_scsi->kernel, sense_buffer[0], sense_buffer[2]); |
| log_debug("%s: non-extended sense class %d code 0x%0x", |
| dev_scsi->kernel, sense_class, code); |
| |
| } |
| |
| #ifdef DUMP_SENSE |
| for (i = 0, j = 0; (i < s) && (j < 254); i++) { |
| 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'; |
| log_debug("%s: sense dump:", dev_scsi->kernel); |
| log_debug("%s: %s", 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. |
| */ |
| log_debug("%s: called with no error", __FUNCTION__); |
| return -1; |
| } |
| |
| log_debug("%s: sg_io failed status 0x%x 0x%x 0x%x 0x%x", |
| 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. |
| */ |
| log_debug("%s: called with no error", __FUNCTION__); |
| return -1; |
| } |
| |
| log_debug("%s: sg_io failed status 0x%x 0x%x 0x%x", |
| 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) { |
| log_debug("buflen %d too long", buflen); |
| return -1; |
| } |
| |
| resend: |
| if (dev_scsi->use_sg == 4) { |
| memzero(&io_v4, 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 { |
| memzero(&io_hdr, 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; |
| } |
| log_debug_errno(errno, "%s: ioctl failed: %m", dev_scsi->kernel); |
| 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) |
| goto resend; |
| retval = -1; |
| } |
| |
| error: |
| if (retval < 0) |
| log_debug("%s: Unable to get INQUIRY vpd %d page 0x%x.", |
| 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; |
| |
| memzero(buffer, len); |
| retval = scsi_inquiry(udev, dev_scsi, fd, 1, 0x0, buffer, len); |
| if (retval < 0) |
| return 1; |
| |
| if (buffer[1] != 0) { |
| log_debug("%s: page 0 not available.", dev_scsi->kernel); |
| return 1; |
| } |
| if (buffer[3] > len) { |
| log_debug("%s: page 0 buffer too long %d", 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 (strneq((char *)&buffer[VENDOR_LENGTH], dev_scsi->vendor, VENDOR_LENGTH)) { |
| log_debug("%s: invalid page0 data", 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)) { |
| log_debug("%s: expected length %d, got length %d", |
| 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) { |
| log_debug("%s: length %d too short - need %d", |
| 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) |
| 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; |
| |
| 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); |
| |
| memzero(page_83, 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) { |
| log_debug("%s: Invalid page 0x83", 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); |
| if (!retval) |
| return retval; |
| else if (retval < 0) |
| return retval; |
| } |
| } |
| 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]; |
| |
| memzero(page_83, 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) { |
| log_debug("%s: Invalid page 0x83", 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++; |
| } |
| 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]; |
| |
| memzero(buf, 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) { |
| log_debug("%s: Invalid page 0x80", dev_scsi->kernel); |
| return 1; |
| } |
| |
| len = 1 + VENDOR_LENGTH + MODEL_LENGTH + buf[3]; |
| if (max_len < len) { |
| log_debug("%s: length %d too short - need %d", |
| 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; |
| ser_ind++; /* for the leading 'S' */ |
| 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; |
| |
| fd = open(devname, O_RDONLY | O_NONBLOCK | O_CLOEXEC); |
| if (fd < 0) { |
| log_debug_errno(errno, "scsi_id: cannot open %s: %m", devname); |
| return 1; |
| } |
| |
| if (fstat(fd, &statbuf) < 0) { |
| log_debug_errno(errno, "scsi_id: cannot stat %s: %m", devname); |
| err = 2; |
| goto out; |
| } |
| sprintf(dev_scsi->kernel,"%d:%d", major(statbuf.st_rdev), |
| minor(statbuf.st_rdev)); |
| |
| memzero(buf, 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; |
| |
| memzero(dev_scsi->serial, len); |
| initialize_srand(); |
| for (cnt = 20; cnt > 0; cnt--) { |
| struct timespec duration; |
| |
| fd = open(devname, O_RDONLY | O_NONBLOCK | O_CLOEXEC); |
| 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) { |
| log_debug("%s: unsupported page code 0x%d", dev_scsi->kernel, page_code); |
| retval = 1; |
| goto completed; |
| } |
| |
| /* |
| * 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; |
| } |
| |
| 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; |
| } |