| /* |
| * scsi_sysfs.c |
| * |
| * SCSI sysfs interface routines. |
| * |
| * Created to pull SCSI mid layer sysfs routines into one file. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/blkdev.h> |
| #include <linux/device.h> |
| #include <linux/pm_runtime.h> |
| |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi_tcq.h> |
| #include <scsi/scsi_transport.h> |
| #include <scsi/scsi_driver.h> |
| |
| #include "scsi_priv.h" |
| #include "scsi_logging.h" |
| |
| static struct device_type scsi_dev_type; |
| |
| static const struct { |
| enum scsi_device_state value; |
| char *name; |
| } sdev_states[] = { |
| { SDEV_CREATED, "created" }, |
| { SDEV_RUNNING, "running" }, |
| { SDEV_CANCEL, "cancel" }, |
| { SDEV_DEL, "deleted" }, |
| { SDEV_QUIESCE, "quiesce" }, |
| { SDEV_OFFLINE, "offline" }, |
| { SDEV_TRANSPORT_OFFLINE, "transport-offline" }, |
| { SDEV_BLOCK, "blocked" }, |
| { SDEV_CREATED_BLOCK, "created-blocked" }, |
| }; |
| |
| const char *scsi_device_state_name(enum scsi_device_state state) |
| { |
| int i; |
| char *name = NULL; |
| |
| for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
| if (sdev_states[i].value == state) { |
| name = sdev_states[i].name; |
| break; |
| } |
| } |
| return name; |
| } |
| |
| static const struct { |
| enum scsi_host_state value; |
| char *name; |
| } shost_states[] = { |
| { SHOST_CREATED, "created" }, |
| { SHOST_RUNNING, "running" }, |
| { SHOST_CANCEL, "cancel" }, |
| { SHOST_DEL, "deleted" }, |
| { SHOST_RECOVERY, "recovery" }, |
| { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
| { SHOST_DEL_RECOVERY, "deleted/recovery", }, |
| }; |
| const char *scsi_host_state_name(enum scsi_host_state state) |
| { |
| int i; |
| char *name = NULL; |
| |
| for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
| if (shost_states[i].value == state) { |
| name = shost_states[i].name; |
| break; |
| } |
| } |
| return name; |
| } |
| |
| static int check_set(unsigned int *val, char *src) |
| { |
| char *last; |
| |
| if (strncmp(src, "-", 20) == 0) { |
| *val = SCAN_WILD_CARD; |
| } else { |
| /* |
| * Doesn't check for int overflow |
| */ |
| *val = simple_strtoul(src, &last, 0); |
| if (*last != '\0') |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int scsi_scan(struct Scsi_Host *shost, const char *str) |
| { |
| char s1[15], s2[15], s3[15], junk; |
| unsigned int channel, id, lun; |
| int res; |
| |
| res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk); |
| if (res != 3) |
| return -EINVAL; |
| if (check_set(&channel, s1)) |
| return -EINVAL; |
| if (check_set(&id, s2)) |
| return -EINVAL; |
| if (check_set(&lun, s3)) |
| return -EINVAL; |
| if (shost->transportt->user_scan) |
| res = shost->transportt->user_scan(shost, channel, id, lun); |
| else |
| res = scsi_scan_host_selected(shost, channel, id, lun, 1); |
| return res; |
| } |
| |
| /* |
| * shost_show_function: macro to create an attr function that can be used to |
| * show a non-bit field. |
| */ |
| #define shost_show_function(name, field, format_string) \ |
| static ssize_t \ |
| show_##name (struct device *dev, struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct Scsi_Host *shost = class_to_shost(dev); \ |
| return snprintf (buf, 20, format_string, shost->field); \ |
| } |
| |
| /* |
| * shost_rd_attr: macro to create a function and attribute variable for a |
| * read only field. |
| */ |
| #define shost_rd_attr2(name, field, format_string) \ |
| shost_show_function(name, field, format_string) \ |
| static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
| |
| #define shost_rd_attr(field, format_string) \ |
| shost_rd_attr2(field, field, format_string) |
| |
| /* |
| * Create the actual show/store functions and data structures. |
| */ |
| |
| static ssize_t |
| store_scan(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| int res; |
| |
| res = scsi_scan(shost, buf); |
| if (res == 0) |
| res = count; |
| return res; |
| }; |
| static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
| |
| static ssize_t |
| store_shost_state(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int i; |
| struct Scsi_Host *shost = class_to_shost(dev); |
| enum scsi_host_state state = 0; |
| |
| for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
| const int len = strlen(shost_states[i].name); |
| if (strncmp(shost_states[i].name, buf, len) == 0 && |
| buf[len] == '\n') { |
| state = shost_states[i].value; |
| break; |
| } |
| } |
| if (!state) |
| return -EINVAL; |
| |
| if (scsi_host_set_state(shost, state)) |
| return -EINVAL; |
| return count; |
| } |
| |
| static ssize_t |
| show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| const char *name = scsi_host_state_name(shost->shost_state); |
| |
| if (!name) |
| return -EINVAL; |
| |
| return snprintf(buf, 20, "%s\n", name); |
| } |
| |
| /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
| struct device_attribute dev_attr_hstate = |
| __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); |
| |
| static ssize_t |
| show_shost_mode(unsigned int mode, char *buf) |
| { |
| ssize_t len = 0; |
| |
| if (mode & MODE_INITIATOR) |
| len = sprintf(buf, "%s", "Initiator"); |
| |
| if (mode & MODE_TARGET) |
| len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); |
| |
| len += sprintf(buf + len, "\n"); |
| |
| return len; |
| } |
| |
| static ssize_t |
| show_shost_supported_mode(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| unsigned int supported_mode = shost->hostt->supported_mode; |
| |
| if (supported_mode == MODE_UNKNOWN) |
| /* by default this should be initiator */ |
| supported_mode = MODE_INITIATOR; |
| |
| return show_shost_mode(supported_mode, buf); |
| } |
| |
| static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
| |
| static ssize_t |
| show_shost_active_mode(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| |
| if (shost->active_mode == MODE_UNKNOWN) |
| return snprintf(buf, 20, "unknown\n"); |
| else |
| return show_shost_mode(shost->active_mode, buf); |
| } |
| |
| static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
| |
| static int check_reset_type(char *str) |
| { |
| if (strncmp(str, "adapter", 10) == 0) |
| return SCSI_ADAPTER_RESET; |
| else if (strncmp(str, "firmware", 10) == 0) |
| return SCSI_FIRMWARE_RESET; |
| else |
| return 0; |
| } |
| |
| static ssize_t |
| store_host_reset(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct Scsi_Host *shost = class_to_shost(dev); |
| struct scsi_host_template *sht = shost->hostt; |
| int ret = -EINVAL; |
| char str[10]; |
| int type; |
| |
| sscanf(buf, "%s", str); |
| type = check_reset_type(str); |
| |
| if (!type) |
| goto exit_store_host_reset; |
| |
| if (sht->host_reset) |
| ret = sht->host_reset(shost, type); |
| |
| exit_store_host_reset: |
| if (ret == 0) |
| ret = count; |
| return ret; |
| } |
| |
| static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); |
| |
| shost_rd_attr(unique_id, "%u\n"); |
| shost_rd_attr(host_busy, "%hu\n"); |
| shost_rd_attr(cmd_per_lun, "%hd\n"); |
| shost_rd_attr(can_queue, "%hd\n"); |
| shost_rd_attr(sg_tablesize, "%hu\n"); |
| shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
| shost_rd_attr(unchecked_isa_dma, "%d\n"); |
| shost_rd_attr(prot_capabilities, "%u\n"); |
| shost_rd_attr(prot_guard_type, "%hd\n"); |
| shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
| |
| static struct attribute *scsi_sysfs_shost_attrs[] = { |
| &dev_attr_unique_id.attr, |
| &dev_attr_host_busy.attr, |
| &dev_attr_cmd_per_lun.attr, |
| &dev_attr_can_queue.attr, |
| &dev_attr_sg_tablesize.attr, |
| &dev_attr_sg_prot_tablesize.attr, |
| &dev_attr_unchecked_isa_dma.attr, |
| &dev_attr_proc_name.attr, |
| &dev_attr_scan.attr, |
| &dev_attr_hstate.attr, |
| &dev_attr_supported_mode.attr, |
| &dev_attr_active_mode.attr, |
| &dev_attr_prot_capabilities.attr, |
| &dev_attr_prot_guard_type.attr, |
| &dev_attr_host_reset.attr, |
| NULL |
| }; |
| |
| struct attribute_group scsi_shost_attr_group = { |
| .attrs = scsi_sysfs_shost_attrs, |
| }; |
| |
| const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
| &scsi_shost_attr_group, |
| NULL |
| }; |
| |
| static void scsi_device_cls_release(struct device *class_dev) |
| { |
| struct scsi_device *sdev; |
| |
| sdev = class_to_sdev(class_dev); |
| put_device(&sdev->sdev_gendev); |
| } |
| |
| static void scsi_device_dev_release_usercontext(struct work_struct *work) |
| { |
| struct scsi_device *sdev; |
| struct device *parent; |
| struct scsi_target *starget; |
| struct list_head *this, *tmp; |
| unsigned long flags; |
| |
| sdev = container_of(work, struct scsi_device, ew.work); |
| |
| parent = sdev->sdev_gendev.parent; |
| starget = to_scsi_target(parent); |
| |
| spin_lock_irqsave(sdev->host->host_lock, flags); |
| starget->reap_ref++; |
| list_del(&sdev->siblings); |
| list_del(&sdev->same_target_siblings); |
| list_del(&sdev->starved_entry); |
| spin_unlock_irqrestore(sdev->host->host_lock, flags); |
| |
| cancel_work_sync(&sdev->event_work); |
| |
| list_for_each_safe(this, tmp, &sdev->event_list) { |
| struct scsi_event *evt; |
| |
| evt = list_entry(this, struct scsi_event, node); |
| list_del(&evt->node); |
| kfree(evt); |
| } |
| |
| blk_put_queue(sdev->request_queue); |
| /* NULL queue means the device can't be used */ |
| sdev->request_queue = NULL; |
| |
| scsi_target_reap(scsi_target(sdev)); |
| |
| kfree(sdev->inquiry); |
| kfree(sdev); |
| |
| if (parent) |
| put_device(parent); |
| } |
| |
| static void scsi_device_dev_release(struct device *dev) |
| { |
| struct scsi_device *sdp = to_scsi_device(dev); |
| execute_in_process_context(scsi_device_dev_release_usercontext, |
| &sdp->ew); |
| } |
| |
| static struct class sdev_class = { |
| .name = "scsi_device", |
| .dev_release = scsi_device_cls_release, |
| }; |
| |
| /* all probing is done in the individual ->probe routines */ |
| static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) |
| { |
| struct scsi_device *sdp; |
| |
| if (dev->type != &scsi_dev_type) |
| return 0; |
| |
| sdp = to_scsi_device(dev); |
| if (sdp->no_uld_attach) |
| return 0; |
| return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; |
| } |
| |
| static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
| { |
| struct scsi_device *sdev; |
| |
| if (dev->type != &scsi_dev_type) |
| return 0; |
| |
| sdev = to_scsi_device(dev); |
| |
| add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
| return 0; |
| } |
| |
| struct bus_type scsi_bus_type = { |
| .name = "scsi", |
| .match = scsi_bus_match, |
| .uevent = scsi_bus_uevent, |
| #ifdef CONFIG_PM |
| .pm = &scsi_bus_pm_ops, |
| #endif |
| }; |
| EXPORT_SYMBOL_GPL(scsi_bus_type); |
| |
| int scsi_sysfs_register(void) |
| { |
| int error; |
| |
| error = bus_register(&scsi_bus_type); |
| if (!error) { |
| error = class_register(&sdev_class); |
| if (error) |
| bus_unregister(&scsi_bus_type); |
| } |
| |
| return error; |
| } |
| |
| void scsi_sysfs_unregister(void) |
| { |
| class_unregister(&sdev_class); |
| bus_unregister(&scsi_bus_type); |
| } |
| |
| /* |
| * sdev_show_function: macro to create an attr function that can be used to |
| * show a non-bit field. |
| */ |
| #define sdev_show_function(field, format_string) \ |
| static ssize_t \ |
| sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct scsi_device *sdev; \ |
| sdev = to_scsi_device(dev); \ |
| return snprintf (buf, 20, format_string, sdev->field); \ |
| } \ |
| |
| /* |
| * sdev_rd_attr: macro to create a function and attribute variable for a |
| * read only field. |
| */ |
| #define sdev_rd_attr(field, format_string) \ |
| sdev_show_function(field, format_string) \ |
| static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); |
| |
| |
| /* |
| * sdev_rw_attr: create a function and attribute variable for a |
| * read/write field. |
| */ |
| #define sdev_rw_attr(field, format_string) \ |
| sdev_show_function(field, format_string) \ |
| \ |
| static ssize_t \ |
| sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
| const char *buf, size_t count) \ |
| { \ |
| struct scsi_device *sdev; \ |
| sdev = to_scsi_device(dev); \ |
| sscanf (buf, format_string, &sdev->field); \ |
| return count; \ |
| } \ |
| static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); |
| |
| /* Currently we don't export bit fields, but we might in future, |
| * so leave this code in */ |
| #if 0 |
| /* |
| * sdev_rd_attr: create a function and attribute variable for a |
| * read/write bit field. |
| */ |
| #define sdev_rw_attr_bit(field) \ |
| sdev_show_function(field, "%d\n") \ |
| \ |
| static ssize_t \ |
| sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
| const char *buf, size_t count) \ |
| { \ |
| int ret; \ |
| struct scsi_device *sdev; \ |
| ret = scsi_sdev_check_buf_bit(buf); \ |
| if (ret >= 0) { \ |
| sdev = to_scsi_device(dev); \ |
| sdev->field = ret; \ |
| ret = count; \ |
| } \ |
| return ret; \ |
| } \ |
| static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); |
| |
| /* |
| * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", |
| * else return -EINVAL. |
| */ |
| static int scsi_sdev_check_buf_bit(const char *buf) |
| { |
| if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { |
| if (buf[0] == '1') |
| return 1; |
| else if (buf[0] == '0') |
| return 0; |
| else |
| return -EINVAL; |
| } else |
| return -EINVAL; |
| } |
| #endif |
| /* |
| * Create the actual show/store functions and data structures. |
| */ |
| sdev_rd_attr (device_blocked, "%d\n"); |
| sdev_rd_attr (queue_depth, "%d\n"); |
| sdev_rd_attr (type, "%d\n"); |
| sdev_rd_attr (scsi_level, "%d\n"); |
| sdev_rd_attr (vendor, "%.8s\n"); |
| sdev_rd_attr (model, "%.16s\n"); |
| sdev_rd_attr (rev, "%.4s\n"); |
| |
| /* |
| * TODO: can we make these symlinks to the block layer ones? |
| */ |
| static ssize_t |
| sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct scsi_device *sdev; |
| sdev = to_scsi_device(dev); |
| return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
| } |
| |
| static ssize_t |
| sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct scsi_device *sdev; |
| int timeout; |
| sdev = to_scsi_device(dev); |
| sscanf (buf, "%d\n", &timeout); |
| blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
| return count; |
| } |
| static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); |
| |
| static ssize_t |
| store_rescan_field (struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| scsi_rescan_device(dev); |
| return count; |
| } |
| static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); |
| |
| static void sdev_store_delete_callback(struct device *dev) |
| { |
| scsi_remove_device(to_scsi_device(dev)); |
| } |
| |
| static ssize_t |
| sdev_store_delete(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int rc; |
| |
| /* An attribute cannot be unregistered by one of its own methods, |
| * so we have to use this roundabout approach. |
| */ |
| rc = device_schedule_callback(dev, sdev_store_delete_callback); |
| if (rc) |
| count = rc; |
| return count; |
| }; |
| static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); |
| |
| static ssize_t |
| store_state_field(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int i; |
| struct scsi_device *sdev = to_scsi_device(dev); |
| enum scsi_device_state state = 0; |
| |
| for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
| const int len = strlen(sdev_states[i].name); |
| if (strncmp(sdev_states[i].name, buf, len) == 0 && |
| buf[len] == '\n') { |
| state = sdev_states[i].value; |
| break; |
| } |
| } |
| if (!state) |
| return -EINVAL; |
| |
| if (scsi_device_set_state(sdev, state)) |
| return -EINVAL; |
| return count; |
| } |
| |
| static ssize_t |
| show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct scsi_device *sdev = to_scsi_device(dev); |
| const char *name = scsi_device_state_name(sdev->sdev_state); |
| |
| if (!name) |
| return -EINVAL; |
| |
| return snprintf(buf, 20, "%s\n", name); |
| } |
| |
| static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); |
| |
| static ssize_t |
| show_queue_type_field(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct scsi_device *sdev = to_scsi_device(dev); |
| const char *name = "none"; |
| |
| if (sdev->ordered_tags) |
| name = "ordered"; |
| else if (sdev->simple_tags) |
| name = "simple"; |
| |
| return snprintf(buf, 20, "%s\n", name); |
| } |
| |
| static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); |
| |
| static ssize_t |
| show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); |
| } |
| |
| static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); |
| |
| #define show_sdev_iostat(field) \ |
| static ssize_t \ |
| show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct scsi_device *sdev = to_scsi_device(dev); \ |
| unsigned long long count = atomic_read(&sdev->field); \ |
| return snprintf(buf, 20, "0x%llx\n", count); \ |
| } \ |
| static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) |
| |
| show_sdev_iostat(iorequest_cnt); |
| show_sdev_iostat(iodone_cnt); |
| show_sdev_iostat(ioerr_cnt); |
| |
| static ssize_t |
| sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct scsi_device *sdev; |
| sdev = to_scsi_device(dev); |
| return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); |
| } |
| static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); |
| |
| #define DECLARE_EVT_SHOW(name, Cap_name) \ |
| static ssize_t \ |
| sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct scsi_device *sdev = to_scsi_device(dev); \ |
| int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ |
| return snprintf(buf, 20, "%d\n", val); \ |
| } |
| |
| #define DECLARE_EVT_STORE(name, Cap_name) \ |
| static ssize_t \ |
| sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
| const char *buf, size_t count) \ |
| { \ |
| struct scsi_device *sdev = to_scsi_device(dev); \ |
| int val = simple_strtoul(buf, NULL, 0); \ |
| if (val == 0) \ |
| clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ |
| else if (val == 1) \ |
| set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ |
| else \ |
| return -EINVAL; \ |
| return count; \ |
| } |
| |
| #define DECLARE_EVT(name, Cap_name) \ |
| DECLARE_EVT_SHOW(name, Cap_name) \ |
| DECLARE_EVT_STORE(name, Cap_name) \ |
| static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ |
| sdev_store_evt_##name); |
| #define REF_EVT(name) &dev_attr_evt_##name.attr |
| |
| DECLARE_EVT(media_change, MEDIA_CHANGE) |
| |
| /* Default template for device attributes. May NOT be modified */ |
| static struct attribute *scsi_sdev_attrs[] = { |
| &dev_attr_device_blocked.attr, |
| &dev_attr_type.attr, |
| &dev_attr_scsi_level.attr, |
| &dev_attr_vendor.attr, |
| &dev_attr_model.attr, |
| &dev_attr_rev.attr, |
| &dev_attr_rescan.attr, |
| &dev_attr_delete.attr, |
| &dev_attr_state.attr, |
| &dev_attr_timeout.attr, |
| &dev_attr_iocounterbits.attr, |
| &dev_attr_iorequest_cnt.attr, |
| &dev_attr_iodone_cnt.attr, |
| &dev_attr_ioerr_cnt.attr, |
| &dev_attr_modalias.attr, |
| REF_EVT(media_change), |
| NULL |
| }; |
| |
| static struct attribute_group scsi_sdev_attr_group = { |
| .attrs = scsi_sdev_attrs, |
| }; |
| |
| static const struct attribute_group *scsi_sdev_attr_groups[] = { |
| &scsi_sdev_attr_group, |
| NULL |
| }; |
| |
| static ssize_t |
| sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| int depth, retval; |
| struct scsi_device *sdev = to_scsi_device(dev); |
| struct scsi_host_template *sht = sdev->host->hostt; |
| |
| if (!sht->change_queue_depth) |
| return -EINVAL; |
| |
| depth = simple_strtoul(buf, NULL, 0); |
| |
| if (depth < 1) |
| return -EINVAL; |
| |
| retval = sht->change_queue_depth(sdev, depth, |
| SCSI_QDEPTH_DEFAULT); |
| if (retval < 0) |
| return retval; |
| |
| sdev->max_queue_depth = sdev->queue_depth; |
| |
| return count; |
| } |
| |
| static struct device_attribute sdev_attr_queue_depth_rw = |
| __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, |
| sdev_store_queue_depth_rw); |
| |
| static ssize_t |
| sdev_show_queue_ramp_up_period(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct scsi_device *sdev; |
| sdev = to_scsi_device(dev); |
| return snprintf(buf, 20, "%u\n", |
| jiffies_to_msecs(sdev->queue_ramp_up_period)); |
| } |
| |
| static ssize_t |
| sdev_store_queue_ramp_up_period(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct scsi_device *sdev = to_scsi_device(dev); |
| unsigned long period; |
| |
| if (strict_strtoul(buf, 10, &period)) |
| return -EINVAL; |
| |
| sdev->queue_ramp_up_period = msecs_to_jiffies(period); |
| return period; |
| } |
| |
| static struct device_attribute sdev_attr_queue_ramp_up_period = |
| __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, |
| sdev_show_queue_ramp_up_period, |
| sdev_store_queue_ramp_up_period); |
| |
| static ssize_t |
| sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct scsi_device *sdev = to_scsi_device(dev); |
| struct scsi_host_template *sht = sdev->host->hostt; |
| int tag_type = 0, retval; |
| int prev_tag_type = scsi_get_tag_type(sdev); |
| |
| if (!sdev->tagged_supported || !sht->change_queue_type) |
| return -EINVAL; |
| |
| if (strncmp(buf, "ordered", 7) == 0) |
| tag_type = MSG_ORDERED_TAG; |
| else if (strncmp(buf, "simple", 6) == 0) |
| tag_type = MSG_SIMPLE_TAG; |
| else if (strncmp(buf, "none", 4) != 0) |
| return -EINVAL; |
| |
| if (tag_type == prev_tag_type) |
| return count; |
| |
| retval = sht->change_queue_type(sdev, tag_type); |
| if (retval < 0) |
| return retval; |
| |
| return count; |
| } |
| |
| static int scsi_target_add(struct scsi_target *starget) |
| { |
| int error; |
| |
| if (starget->state != STARGET_CREATED) |
| return 0; |
| |
| error = device_add(&starget->dev); |
| if (error) { |
| dev_err(&starget->dev, "target device_add failed, error %d\n", error); |
| return error; |
| } |
| transport_add_device(&starget->dev); |
| starget->state = STARGET_RUNNING; |
| |
| pm_runtime_set_active(&starget->dev); |
| pm_runtime_enable(&starget->dev); |
| device_enable_async_suspend(&starget->dev); |
| |
| return 0; |
| } |
| |
| static struct device_attribute sdev_attr_queue_type_rw = |
| __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, |
| sdev_store_queue_type_rw); |
| |
| /** |
| * scsi_sysfs_add_sdev - add scsi device to sysfs |
| * @sdev: scsi_device to add |
| * |
| * Return value: |
| * 0 on Success / non-zero on Failure |
| **/ |
| int scsi_sysfs_add_sdev(struct scsi_device *sdev) |
| { |
| int error, i; |
| struct request_queue *rq = sdev->request_queue; |
| struct scsi_target *starget = sdev->sdev_target; |
| |
| error = scsi_device_set_state(sdev, SDEV_RUNNING); |
| if (error) |
| return error; |
| |
| error = scsi_target_add(starget); |
| if (error) |
| return error; |
| |
| transport_configure_device(&starget->dev); |
| |
| device_enable_async_suspend(&sdev->sdev_gendev); |
| scsi_autopm_get_target(starget); |
| pm_runtime_set_active(&sdev->sdev_gendev); |
| pm_runtime_forbid(&sdev->sdev_gendev); |
| pm_runtime_enable(&sdev->sdev_gendev); |
| scsi_autopm_put_target(starget); |
| |
| /* The following call will keep sdev active indefinitely, until |
| * its driver does a corresponding scsi_autopm_pm_device(). Only |
| * drivers supporting autosuspend will do this. |
| */ |
| scsi_autopm_get_device(sdev); |
| |
| error = device_add(&sdev->sdev_gendev); |
| if (error) { |
| sdev_printk(KERN_INFO, sdev, |
| "failed to add device: %d\n", error); |
| return error; |
| } |
| device_enable_async_suspend(&sdev->sdev_dev); |
| error = device_add(&sdev->sdev_dev); |
| if (error) { |
| sdev_printk(KERN_INFO, sdev, |
| "failed to add class device: %d\n", error); |
| device_del(&sdev->sdev_gendev); |
| return error; |
| } |
| transport_add_device(&sdev->sdev_gendev); |
| sdev->is_visible = 1; |
| |
| /* create queue files, which may be writable, depending on the host */ |
| if (sdev->host->hostt->change_queue_depth) { |
| error = device_create_file(&sdev->sdev_gendev, |
| &sdev_attr_queue_depth_rw); |
| error = device_create_file(&sdev->sdev_gendev, |
| &sdev_attr_queue_ramp_up_period); |
| } |
| else |
| error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth); |
| if (error) |
| return error; |
| |
| if (sdev->host->hostt->change_queue_type) |
| error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw); |
| else |
| error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type); |
| if (error) |
| return error; |
| |
| error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL); |
| |
| if (error) |
| /* we're treating error on bsg register as non-fatal, |
| * so pretend nothing went wrong */ |
| sdev_printk(KERN_INFO, sdev, |
| "Failed to register bsg queue, errno=%d\n", error); |
| |
| /* add additional host specific attributes */ |
| if (sdev->host->hostt->sdev_attrs) { |
| for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { |
| error = device_create_file(&sdev->sdev_gendev, |
| sdev->host->hostt->sdev_attrs[i]); |
| if (error) |
| return error; |
| } |
| } |
| |
| return error; |
| } |
| |
| void __scsi_remove_device(struct scsi_device *sdev) |
| { |
| struct device *dev = &sdev->sdev_gendev; |
| |
| if (sdev->is_visible) { |
| if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) |
| return; |
| |
| bsg_unregister_queue(sdev->request_queue); |
| device_unregister(&sdev->sdev_dev); |
| transport_remove_device(dev); |
| device_del(dev); |
| } else |
| put_device(&sdev->sdev_dev); |
| scsi_device_set_state(sdev, SDEV_DEL); |
| if (sdev->host->hostt->slave_destroy) |
| sdev->host->hostt->slave_destroy(sdev); |
| transport_destroy_device(dev); |
| |
| /* Freeing the queue signals to block that we're done */ |
| blk_cleanup_queue(sdev->request_queue); |
| put_device(dev); |
| } |
| |
| /** |
| * scsi_remove_device - unregister a device from the scsi bus |
| * @sdev: scsi_device to unregister |
| **/ |
| void scsi_remove_device(struct scsi_device *sdev) |
| { |
| struct Scsi_Host *shost = sdev->host; |
| |
| mutex_lock(&shost->scan_mutex); |
| __scsi_remove_device(sdev); |
| mutex_unlock(&shost->scan_mutex); |
| } |
| EXPORT_SYMBOL(scsi_remove_device); |
| |
| static void __scsi_remove_target(struct scsi_target *starget) |
| { |
| struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| unsigned long flags; |
| struct scsi_device *sdev; |
| |
| spin_lock_irqsave(shost->host_lock, flags); |
| starget->reap_ref++; |
| restart: |
| list_for_each_entry(sdev, &shost->__devices, siblings) { |
| if (sdev->channel != starget->channel || |
| sdev->id != starget->id || |
| scsi_device_get(sdev)) |
| continue; |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| scsi_remove_device(sdev); |
| scsi_device_put(sdev); |
| spin_lock_irqsave(shost->host_lock, flags); |
| goto restart; |
| } |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| scsi_target_reap(starget); |
| } |
| |
| static int __remove_child (struct device * dev, void * data) |
| { |
| if (scsi_is_target_device(dev)) |
| __scsi_remove_target(to_scsi_target(dev)); |
| return 0; |
| } |
| |
| /** |
| * scsi_remove_target - try to remove a target and all its devices |
| * @dev: generic starget or parent of generic stargets to be removed |
| * |
| * Note: This is slightly racy. It is possible that if the user |
| * requests the addition of another device then the target won't be |
| * removed. |
| */ |
| void scsi_remove_target(struct device *dev) |
| { |
| if (scsi_is_target_device(dev)) { |
| __scsi_remove_target(to_scsi_target(dev)); |
| return; |
| } |
| |
| get_device(dev); |
| device_for_each_child(dev, NULL, __remove_child); |
| put_device(dev); |
| } |
| EXPORT_SYMBOL(scsi_remove_target); |
| |
| int scsi_register_driver(struct device_driver *drv) |
| { |
| drv->bus = &scsi_bus_type; |
| |
| return driver_register(drv); |
| } |
| EXPORT_SYMBOL(scsi_register_driver); |
| |
| int scsi_register_interface(struct class_interface *intf) |
| { |
| intf->class = &sdev_class; |
| |
| return class_interface_register(intf); |
| } |
| EXPORT_SYMBOL(scsi_register_interface); |
| |
| /** |
| * scsi_sysfs_add_host - add scsi host to subsystem |
| * @shost: scsi host struct to add to subsystem |
| **/ |
| int scsi_sysfs_add_host(struct Scsi_Host *shost) |
| { |
| int error, i; |
| |
| /* add host specific attributes */ |
| if (shost->hostt->shost_attrs) { |
| for (i = 0; shost->hostt->shost_attrs[i]; i++) { |
| error = device_create_file(&shost->shost_dev, |
| shost->hostt->shost_attrs[i]); |
| if (error) |
| return error; |
| } |
| } |
| |
| transport_register_device(&shost->shost_gendev); |
| transport_configure_device(&shost->shost_gendev); |
| return 0; |
| } |
| |
| static struct device_type scsi_dev_type = { |
| .name = "scsi_device", |
| .release = scsi_device_dev_release, |
| .groups = scsi_sdev_attr_groups, |
| }; |
| |
| void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
| { |
| unsigned long flags; |
| struct Scsi_Host *shost = sdev->host; |
| struct scsi_target *starget = sdev->sdev_target; |
| |
| device_initialize(&sdev->sdev_gendev); |
| sdev->sdev_gendev.bus = &scsi_bus_type; |
| sdev->sdev_gendev.type = &scsi_dev_type; |
| dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d", |
| sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
| |
| device_initialize(&sdev->sdev_dev); |
| sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
| sdev->sdev_dev.class = &sdev_class; |
| dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d", |
| sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
| sdev->scsi_level = starget->scsi_level; |
| transport_setup_device(&sdev->sdev_gendev); |
| spin_lock_irqsave(shost->host_lock, flags); |
| list_add_tail(&sdev->same_target_siblings, &starget->devices); |
| list_add_tail(&sdev->siblings, &shost->__devices); |
| spin_unlock_irqrestore(shost->host_lock, flags); |
| } |
| |
| int scsi_is_sdev_device(const struct device *dev) |
| { |
| return dev->type == &scsi_dev_type; |
| } |
| EXPORT_SYMBOL(scsi_is_sdev_device); |
| |
| /* A blank transport template that is used in drivers that don't |
| * yet implement Transport Attributes */ |
| struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |