diff options
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_configfs.c | 157 |
1 files changed, 142 insertions, 15 deletions
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index fc5ef31f5ba8..8f3faef235b5 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -1227,6 +1227,29 @@ static struct t10_wwn *to_t10_wwn(struct config_item *item) return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); } +static ssize_t target_check_inquiry_data(char *buf) +{ + size_t len; + int i; + + len = strlen(buf); + + /* + * SPC 4.3.1: + * ASCII data fields shall contain only ASCII printable characters + * (i.e., code values 20h to 7Eh) and may be terminated with one or + * more ASCII null (00h) characters. + */ + for (i = 0; i < len; i++) { + if (buf[i] < 0x20 || buf[i] > 0x7E) { + pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); + return -EINVAL; + } + } + + return len; +} + /* * STANDARD and VPD page 0x83 T10 Vendor Identification */ @@ -1244,8 +1267,7 @@ static ssize_t target_wwn_vendor_id_store(struct config_item *item, /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ unsigned char buf[INQUIRY_VENDOR_LEN + 2]; char *stripped = NULL; - size_t len; - int i; + size_t len, ret; len = strlcpy(buf, page, sizeof(buf)); if (len < sizeof(buf)) { @@ -1260,19 +1282,10 @@ static ssize_t target_wwn_vendor_id_store(struct config_item *item, return -EOVERFLOW; } - /* - * SPC 4.3.1: - * ASCII data fields shall contain only ASCII printable characters (i.e., - * code values 20h to 7Eh) and may be terminated with one or more ASCII - * null (00h) characters. - */ - for (i = 0; i < len; i++) { - if ((stripped[i] < 0x20) || (stripped[i] > 0x7E)) { - pr_err("Emulated T10 Vendor Identification contains" - " non-ASCII-printable characters\n"); - return -EINVAL; - } - } + ret = target_check_inquiry_data(stripped); + + if (ret < 0) + return ret; /* * Check to see if any active exports exist. If they do exist, fail @@ -1295,6 +1308,116 @@ static ssize_t target_wwn_vendor_id_store(struct config_item *item, return count; } +static ssize_t target_wwn_product_id_show(struct config_item *item, + char *page) +{ + return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); +} + +static ssize_t target_wwn_product_id_store(struct config_item *item, + const char *page, size_t count) +{ + struct t10_wwn *t10_wwn = to_t10_wwn(item); + struct se_device *dev = t10_wwn->t10_dev; + /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ + unsigned char buf[INQUIRY_MODEL_LEN + 2]; + char *stripped = NULL; + size_t len, ret; + + len = strlcpy(buf, page, sizeof(buf)); + if (len < sizeof(buf)) { + /* Strip any newline added from userspace. */ + stripped = strstrip(buf); + len = strlen(stripped); + } + if (len > INQUIRY_MODEL_LEN) { + pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " + __stringify(INQUIRY_MODEL_LEN) + "\n"); + return -EOVERFLOW; + } + + ret = target_check_inquiry_data(stripped); + + if (ret < 0) + return ret; + + /* + * Check to see if any active exports exist. If they do exist, fail + * here as changing this information on the fly (underneath the + * initiator side OS dependent multipath code) could cause negative + * effects. + */ + if (dev->export_count) { + pr_err("Unable to set T10 Model while active %d exports exist\n", + dev->export_count); + return -EINVAL; + } + + BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); + strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model)); + + pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", + dev->t10_wwn.model); + + return count; +} + +static ssize_t target_wwn_revision_show(struct config_item *item, + char *page) +{ + return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); +} + +static ssize_t target_wwn_revision_store(struct config_item *item, + const char *page, size_t count) +{ + struct t10_wwn *t10_wwn = to_t10_wwn(item); + struct se_device *dev = t10_wwn->t10_dev; + /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ + unsigned char buf[INQUIRY_REVISION_LEN + 2]; + char *stripped = NULL; + size_t len, ret; + + len = strlcpy(buf, page, sizeof(buf)); + if (len < sizeof(buf)) { + /* Strip any newline added from userspace. */ + stripped = strstrip(buf); + len = strlen(stripped); + } + if (len > INQUIRY_REVISION_LEN) { + pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " + __stringify(INQUIRY_REVISION_LEN) + "\n"); + return -EOVERFLOW; + } + + ret = target_check_inquiry_data(stripped); + + if (ret < 0) + return ret; + + /* + * Check to see if any active exports exist. If they do exist, fail + * here as changing this information on the fly (underneath the + * initiator side OS dependent multipath code) could cause negative + * effects. + */ + if (dev->export_count) { + pr_err("Unable to set T10 Revision while active %d exports exist\n", + dev->export_count); + return -EINVAL; + } + + BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); + strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision)); + + pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", + dev->t10_wwn.revision); + + return count; +} + /* * VPD page 0x80 Unit serial */ @@ -1442,6 +1565,8 @@ DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); CONFIGFS_ATTR(target_wwn_, vendor_id); +CONFIGFS_ATTR(target_wwn_, product_id); +CONFIGFS_ATTR(target_wwn_, revision); CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); @@ -1450,6 +1575,8 @@ CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); static struct configfs_attribute *target_core_dev_wwn_attrs[] = { &target_wwn_attr_vendor_id, + &target_wwn_attr_product_id, + &target_wwn_attr_revision, &target_wwn_attr_vpd_unit_serial, &target_wwn_attr_vpd_protocol_identifier, &target_wwn_attr_vpd_assoc_logical_unit, |