| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| James Bottomley | 1318 | 18.21% | 45 | 15.73% |
| Hannes Reinecke | 1252 | 17.30% | 21 | 7.34% |
| Mike Anderson | 638 | 8.82% | 11 | 3.85% |
| Christoph Hellwig | 542 | 7.49% | 46 | 16.08% |
| Patrick Mansfield | 480 | 6.63% | 7 | 2.45% |
| Bart Van Assche | 334 | 4.62% | 20 | 6.99% |
| Martin K. Petersen | 322 | 4.45% | 4 | 1.40% |
| FUJITA Tomonori | 174 | 2.40% | 1 | 0.35% |
| Linus Torvalds (pre-git) | 139 | 1.92% | 18 | 6.29% |
| Damien Le Moal | 136 | 1.88% | 2 | 0.70% |
| Alan Stern | 120 | 1.66% | 11 | 3.85% |
| Johannes Thumshirn | 119 | 1.64% | 2 | 0.70% |
| Vikas Chaudhary | 111 | 1.53% | 1 | 0.35% |
| Ryan Attard | 109 | 1.51% | 1 | 0.35% |
| Vasu Dev | 103 | 1.42% | 1 | 0.35% |
| Jeff Garzik | 101 | 1.40% | 1 | 0.35% |
| Yani Ioannou | 101 | 1.40% | 1 | 0.35% |
| Michael Tokarev | 90 | 1.24% | 1 | 0.35% |
| Ren Mingxin | 86 | 1.19% | 1 | 0.35% |
| Brian King | 72 | 1.00% | 2 | 0.70% |
| John Garry | 71 | 0.98% | 1 | 0.35% |
| Tony Jones | 70 | 0.97% | 1 | 0.35% |
| Ewan D. Milne | 57 | 0.79% | 2 | 0.70% |
| Jens Axboe | 52 | 0.72% | 5 | 1.75% |
| Dan J Williams | 52 | 0.72% | 2 | 0.70% |
| Kurt Garloff | 51 | 0.70% | 2 | 0.70% |
| Alex Tomas | 47 | 0.65% | 1 | 0.35% |
| Kay Sievers | 45 | 0.62% | 4 | 1.40% |
| Michael Christie | 38 | 0.53% | 4 | 1.40% |
| Andrew Vasquez | 31 | 0.43% | 1 | 0.35% |
| Uday Shankar | 28 | 0.39% | 1 | 0.35% |
| Yufen Yu | 28 | 0.39% | 1 | 0.35% |
| Chandra Seetharaman | 28 | 0.39% | 3 | 1.05% |
| zhengbin | 24 | 0.33% | 1 | 0.35% |
| Vitaly Kuznetsov | 23 | 0.32% | 1 | 0.35% |
| Patrick Mochel | 18 | 0.25% | 2 | 0.70% |
| Linus Torvalds | 17 | 0.23% | 5 | 1.75% |
| Rafael J. Wysocki | 13 | 0.18% | 2 | 0.70% |
| Krzysztof Kozlowski | 13 | 0.18% | 1 | 0.35% |
| Ming Lei | 13 | 0.18% | 4 | 1.40% |
| Andi Kleen | 12 | 0.17% | 1 | 0.35% |
| Menny Hamburger | 11 | 0.15% | 1 | 0.35% |
| JackieLiu | 9 | 0.12% | 1 | 0.35% |
| Doug Ledford | 9 | 0.12% | 2 | 0.70% |
| David Howells | 9 | 0.12% | 1 | 0.35% |
| lijinlin | 7 | 0.10% | 2 | 0.70% |
| Adrian Bunk | 7 | 0.10% | 3 | 1.05% |
| Stanley Chu | 7 | 0.10% | 1 | 0.35% |
| Bo Wu | 7 | 0.10% | 1 | 0.35% |
| Paul E. McKenney | 6 | 0.08% | 1 | 0.35% |
| James Smart | 6 | 0.08% | 1 | 0.35% |
| weiping zhang | 6 | 0.08% | 1 | 0.35% |
| Christof Schmitt | 6 | 0.08% | 1 | 0.35% |
| Greg Kroah-Hartman | 5 | 0.07% | 3 | 1.05% |
| Subhash Jadavani | 5 | 0.07% | 1 | 0.35% |
| Jun'ichi Nomura | 5 | 0.07% | 1 | 0.35% |
| Tobias Klauser | 5 | 0.07% | 1 | 0.35% |
| Arjan van de Ven | 5 | 0.07% | 2 | 0.70% |
| Kai Mäkisara | 4 | 0.06% | 1 | 0.35% |
| Guosong Su | 4 | 0.06% | 1 | 0.35% |
| Tejun Heo | 4 | 0.06% | 1 | 0.35% |
| Yang Ruirui | 4 | 0.06% | 1 | 0.35% |
| Sasha Levin | 4 | 0.06% | 1 | 0.35% |
| Takashi Iwai | 3 | 0.04% | 1 | 0.35% |
| Steffen Maier | 3 | 0.04% | 1 | 0.35% |
| Ricardo B. Marliere | 3 | 0.04% | 2 | 0.70% |
| Daniel Walter | 2 | 0.03% | 1 | 0.35% |
| Randy Dunlap | 2 | 0.03% | 2 | 0.70% |
| Tomohiro Kusumi | 2 | 0.03% | 1 | 0.35% |
| Stanislav Nijnikov | 2 | 0.03% | 1 | 0.35% |
| Nick Desaulniers | 1 | 0.01% | 1 | 0.35% |
| Peter Oberparleiter | 1 | 0.01% | 1 | 0.35% |
| Mike Sullivan | 1 | 0.01% | 1 | 0.35% |
| Thomas Gleixner | 1 | 0.01% | 1 | 0.35% |
| dudengke | 1 | 0.01% | 1 | 0.35% |
| Martin Wilck | 1 | 0.01% | 1 | 0.35% |
| Total | 7236 | 286 |
// SPDX-License-Identifier: GPL-2.0-only /* * 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 <linux/bsg.h> #include <scsi/scsi.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> #include <scsi/scsi_tcq.h> #include <scsi/scsi_dh.h> #include <scsi/scsi_transport.h> #include <scsi/scsi_driver.h> #include <scsi/scsi_devinfo.h> #include "scsi_priv.h" #include "scsi_logging.h" static const 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; } #ifdef CONFIG_SCSI_DH static const struct { unsigned char value; char *name; } sdev_access_states[] = { { SCSI_ACCESS_STATE_OPTIMAL, "active/optimized" }, { SCSI_ACCESS_STATE_ACTIVE, "active/non-optimized" }, { SCSI_ACCESS_STATE_STANDBY, "standby" }, { SCSI_ACCESS_STATE_UNAVAILABLE, "unavailable" }, { SCSI_ACCESS_STATE_LBA, "lba-dependent" }, { SCSI_ACCESS_STATE_OFFLINE, "offline" }, { SCSI_ACCESS_STATE_TRANSITIONING, "transitioning" }, }; static const char *scsi_access_state_name(unsigned char state) { int i; char *name = NULL; for (i = 0; i < ARRAY_SIZE(sdev_access_states); i++) { if (sdev_access_states[i].value == state) { name = sdev_access_states[i].name; break; } } return name; } #endif static int check_set(unsigned long long *val, char *src) { char *last; if (strcmp(src, "-") == 0) { *val = SCAN_WILD_CARD; } else { /* * Doesn't check for int overflow */ *val = simple_strtoull(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[17], junk; unsigned long long channel, id, lun; int res; res = sscanf(str, "%10s %10s %16s %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, SCSI_SCAN_MANUAL); 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 */ static 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(const char *str) { if (sysfs_streq(str, "adapter")) return SCSI_ADAPTER_RESET; else if (sysfs_streq(str, "firmware")) 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); const struct scsi_host_template *sht = shost->hostt; int ret = -EINVAL; int type; type = check_reset_type(buf); if (!type) goto exit_store_host_reset; if (sht->host_reset) ret = sht->host_reset(shost, type); else ret = -EOPNOTSUPP; exit_store_host_reset: if (ret == 0) ret = count; return ret; } static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); static ssize_t show_shost_eh_deadline(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); if (shost->eh_deadline == -1) return snprintf(buf, strlen("off") + 2, "off\n"); return sprintf(buf, "%u\n", shost->eh_deadline / HZ); } static ssize_t store_shost_eh_deadline(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct Scsi_Host *shost = class_to_shost(dev); int ret = -EINVAL; unsigned long deadline, flags; if (shost->transportt && (shost->transportt->eh_strategy_handler || !shost->hostt->eh_host_reset_handler)) return ret; if (!strncmp(buf, "off", strlen("off"))) deadline = -1; else { ret = kstrtoul(buf, 10, &deadline); if (ret) return ret; if (deadline * HZ > UINT_MAX) return -EINVAL; } spin_lock_irqsave(shost->host_lock, flags); if (scsi_host_in_recovery(shost)) ret = -EBUSY; else { if (deadline == -1) shost->eh_deadline = -1; else shost->eh_deadline = deadline * HZ; ret = count; } spin_unlock_irqrestore(shost->host_lock, flags); return ret; } static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); shost_rd_attr(unique_id, "%u\n"); shost_rd_attr(cmd_per_lun, "%hd\n"); shost_rd_attr(can_queue, "%d\n"); shost_rd_attr(sg_tablesize, "%hu\n"); shost_rd_attr(sg_prot_tablesize, "%hu\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 ssize_t show_host_busy(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); return snprintf(buf, 20, "%d\n", scsi_host_busy(shost)); } static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL); static ssize_t show_use_blk_mq(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "1\n"); } static DEVICE_ATTR(use_blk_mq, S_IRUGO, show_use_blk_mq, NULL); static ssize_t show_nr_hw_queues(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); struct blk_mq_tag_set *tag_set = &shost->tag_set; return snprintf(buf, 20, "%d\n", tag_set->nr_hw_queues); } static DEVICE_ATTR(nr_hw_queues, S_IRUGO, show_nr_hw_queues, NULL); static struct attribute *scsi_sysfs_shost_attrs[] = { &dev_attr_use_blk_mq.attr, &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_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, &dev_attr_eh_deadline.attr, &dev_attr_nr_hw_queues.attr, NULL }; static const struct attribute_group scsi_shost_attr_group = { .attrs = scsi_sysfs_shost_attrs, }; const struct attribute_group *scsi_shost_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(struct device *dev) { struct scsi_device *sdev = to_scsi_device(dev); struct device *parent; struct list_head *this, *tmp; struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL; struct scsi_vpd *vpd_pg0 = NULL, *vpd_pg89 = NULL; struct scsi_vpd *vpd_pgb0 = NULL, *vpd_pgb1 = NULL, *vpd_pgb2 = NULL; struct scsi_vpd *vpd_pgb7 = NULL; unsigned long flags; might_sleep(); scsi_dh_release_device(sdev); parent = sdev->sdev_gendev.parent; spin_lock_irqsave(sdev->host->host_lock, flags); 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; sbitmap_free(&sdev->budget_map); mutex_lock(&sdev->inquiry_mutex); vpd_pg0 = rcu_replace_pointer(sdev->vpd_pg0, vpd_pg0, lockdep_is_held(&sdev->inquiry_mutex)); vpd_pg80 = rcu_replace_pointer(sdev->vpd_pg80, vpd_pg80, lockdep_is_held(&sdev->inquiry_mutex)); vpd_pg83 = rcu_replace_pointer(sdev->vpd_pg83, vpd_pg83, lockdep_is_held(&sdev->inquiry_mutex)); vpd_pg89 = rcu_replace_pointer(sdev->vpd_pg89, vpd_pg89, lockdep_is_held(&sdev->inquiry_mutex)); vpd_pgb0 = rcu_replace_pointer(sdev->vpd_pgb0, vpd_pgb0, lockdep_is_held(&sdev->inquiry_mutex)); vpd_pgb1 = rcu_replace_pointer(sdev->vpd_pgb1, vpd_pgb1, lockdep_is_held(&sdev->inquiry_mutex)); vpd_pgb2 = rcu_replace_pointer(sdev->vpd_pgb2, vpd_pgb2, lockdep_is_held(&sdev->inquiry_mutex)); vpd_pgb7 = rcu_replace_pointer(sdev->vpd_pgb7, vpd_pgb7, lockdep_is_held(&sdev->inquiry_mutex)); mutex_unlock(&sdev->inquiry_mutex); if (vpd_pg0) kfree_rcu(vpd_pg0, rcu); if (vpd_pg83) kfree_rcu(vpd_pg83, rcu); if (vpd_pg80) kfree_rcu(vpd_pg80, rcu); if (vpd_pg89) kfree_rcu(vpd_pg89, rcu); if (vpd_pgb0) kfree_rcu(vpd_pgb0, rcu); if (vpd_pgb1) kfree_rcu(vpd_pgb1, rcu); if (vpd_pgb2) kfree_rcu(vpd_pgb2, rcu); if (vpd_pgb7) kfree_rcu(vpd_pgb7, rcu); kfree(sdev->inquiry); kfree(sdev); if (parent) put_device(parent); } 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, const 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(const struct device *dev, struct kobj_uevent_env *env) { const 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; } const 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 }; 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 (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"); sdev_rd_attr (cdl_supported, "%d\n"); static ssize_t sdev_show_device_busy(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); return snprintf(buf, 20, "%d\n", scsi_device_busy(sdev)); } static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL); static ssize_t sdev_show_device_blocked(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked)); } static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL); /* * 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 sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev; sdev = to_scsi_device(dev); return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); } static ssize_t sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct scsi_device *sdev; unsigned int eh_timeout; int err; if (!capable(CAP_SYS_ADMIN)) return -EACCES; sdev = to_scsi_device(dev); err = kstrtouint(buf, 10, &eh_timeout); if (err) return err; sdev->eh_timeout = eh_timeout * HZ; return count; } static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); static ssize_t store_rescan_field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { scsi_rescan_device(to_scsi_device(dev)); return count; } static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); static ssize_t sdev_store_delete(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct kernfs_node *kn; struct scsi_device *sdev = to_scsi_device(dev); /* * We need to try to get module, avoiding the module been removed * during delete. */ if (scsi_device_get(sdev)) return -ENODEV; kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); WARN_ON_ONCE(!kn); /* * Concurrent writes into the "delete" sysfs attribute may trigger * concurrent calls to device_remove_file() and scsi_remove_device(). * device_remove_file() handles concurrent removal calls by * serializing these and by ignoring the second and later removal * attempts. Concurrent calls of scsi_remove_device() are * serialized. The second and later calls of scsi_remove_device() are * ignored because the first call of that function changes the device * state into SDEV_DEL. */ device_remove_file(dev, attr); scsi_remove_device(sdev); if (kn) sysfs_unbreak_active_protection(kn); scsi_device_put(sdev); 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, ret; struct scsi_device *sdev = to_scsi_device(dev); enum scsi_device_state state = 0; bool rescan_dev = false; 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; } } switch (state) { case SDEV_RUNNING: case SDEV_OFFLINE: break; default: return -EINVAL; } mutex_lock(&sdev->state_mutex); switch (sdev->sdev_state) { case SDEV_RUNNING: case SDEV_OFFLINE: break; default: mutex_unlock(&sdev->state_mutex); return -EINVAL; } if (sdev->sdev_state == SDEV_RUNNING && state == SDEV_RUNNING) { ret = 0; } else { ret = scsi_device_set_state(sdev, state); if (ret == 0 && state == SDEV_RUNNING) rescan_dev = true; } mutex_unlock(&sdev->state_mutex); if (rescan_dev) { /* * If the device state changes to SDEV_RUNNING, we need to * run the queue to avoid I/O hang, and rescan the device * to revalidate it. Running the queue first is necessary * because another thread may be waiting inside * blk_mq_freeze_queue_wait() and because that call may be * waiting for pending I/O to finish. */ blk_mq_run_hw_queues(sdev->request_queue, true); scsi_rescan_device(sdev); } return ret == 0 ? count : -EINVAL; } 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->simple_tags) name = "simple"; return snprintf(buf, 20, "%s\n", name); } static ssize_t store_queue_type_field(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct scsi_device *sdev = to_scsi_device(dev); if (!sdev->tagged_supported) return -EINVAL; sdev_printk(KERN_INFO, sdev, "ignoring write to deprecated queue_type attribute"); return count; } static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, store_queue_type_field); #define sdev_vpd_pg_attr(_page) \ static ssize_t \ show_vpd_##_page(struct file *filp, struct kobject *kobj, \ struct bin_attribute *bin_attr, \ char *buf, loff_t off, size_t count) \ { \ struct device *dev = kobj_to_dev(kobj); \ struct scsi_device *sdev = to_scsi_device(dev); \ struct scsi_vpd *vpd_page; \ int ret = -EINVAL; \ \ rcu_read_lock(); \ vpd_page = rcu_dereference(sdev->vpd_##_page); \ if (vpd_page) \ ret = memory_read_from_buffer(buf, count, &off, \ vpd_page->data, vpd_page->len); \ rcu_read_unlock(); \ return ret; \ } \ static struct bin_attribute dev_attr_vpd_##_page = { \ .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \ .size = 0, \ .read = show_vpd_##_page, \ }; sdev_vpd_pg_attr(pg83); sdev_vpd_pg_attr(pg80); sdev_vpd_pg_attr(pg89); sdev_vpd_pg_attr(pgb0); sdev_vpd_pg_attr(pgb1); sdev_vpd_pg_attr(pgb2); sdev_vpd_pg_attr(pgb7); sdev_vpd_pg_attr(pg0); static ssize_t show_inquiry(struct file *filep, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { struct device *dev = kobj_to_dev(kobj); struct scsi_device *sdev = to_scsi_device(dev); if (!sdev->inquiry) return -EINVAL; return memory_read_from_buffer(buf, count, &off, sdev->inquiry, sdev->inquiry_len); } static struct bin_attribute dev_attr_inquiry = { .attr = { .name = "inquiry", .mode = S_IRUGO, }, .size = 0, .read = show_inquiry, }; 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); show_sdev_iostat(iotmo_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) DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) static ssize_t sdev_store_queue_depth(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int depth, retval; struct scsi_device *sdev = to_scsi_device(dev); const struct scsi_host_template *sht = sdev->host->hostt; if (!sht->change_queue_depth) return -EINVAL; depth = simple_strtoul(buf, NULL, 0); if (depth < 1 || depth > sdev->host->can_queue) return -EINVAL; retval = sht->change_queue_depth(sdev, depth); if (retval < 0) return retval; sdev->max_queue_depth = sdev->queue_depth; return count; } sdev_show_function(queue_depth, "%d\n"); static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, sdev_store_queue_depth); static ssize_t sdev_show_wwid(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); ssize_t count; count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE); if (count > 0) { buf[count] = '\n'; count++; } return count; } static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL); #define BLIST_FLAG_NAME(name) \ [const_ilog2((__force __u64)BLIST_##name)] = #name static const char *const sdev_bflags_name[] = { #include "scsi_devinfo_tbl.c" }; #undef BLIST_FLAG_NAME static ssize_t sdev_show_blacklist(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); int i; ssize_t len = 0; for (i = 0; i < sizeof(sdev->sdev_bflags) * BITS_PER_BYTE; i++) { const char *name = NULL; if (!(sdev->sdev_bflags & (__force blist_flags_t)BIT(i))) continue; if (i < ARRAY_SIZE(sdev_bflags_name) && sdev_bflags_name[i]) name = sdev_bflags_name[i]; if (name) len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", len ? " " : "", name); else len += scnprintf(buf + len, PAGE_SIZE - len, "%sINVALID_BIT(%d)", len ? " " : "", i); } if (len) len += scnprintf(buf + len, PAGE_SIZE - len, "\n"); return len; } static DEVICE_ATTR(blacklist, S_IRUGO, sdev_show_blacklist, NULL); #ifdef CONFIG_SCSI_DH static ssize_t sdev_show_dh_state(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); if (!sdev->handler) return snprintf(buf, 20, "detached\n"); return snprintf(buf, 20, "%s\n", sdev->handler->name); } static ssize_t sdev_store_dh_state(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct scsi_device *sdev = to_scsi_device(dev); int err = -EINVAL; if (sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL) return -ENODEV; if (!sdev->handler) { /* * Attach to a device handler */ err = scsi_dh_attach(sdev->request_queue, buf); } else if (!strncmp(buf, "activate", 8)) { /* * Activate a device handler */ if (sdev->handler->activate) err = sdev->handler->activate(sdev, NULL, NULL); else err = 0; } else if (!strncmp(buf, "detach", 6)) { /* * Detach from a device handler */ sdev_printk(KERN_WARNING, sdev, "can't detach handler %s.\n", sdev->handler->name); err = -EINVAL; } return err < 0 ? err : count; } static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state, sdev_store_dh_state); static ssize_t sdev_show_access_state(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); unsigned char access_state; const char *access_state_name; if (!sdev->handler) return -EINVAL; access_state = (sdev->access_state & SCSI_ACCESS_STATE_MASK); access_state_name = scsi_access_state_name(access_state); return sprintf(buf, "%s\n", access_state_name ? access_state_name : "unknown"); } static DEVICE_ATTR(access_state, S_IRUGO, sdev_show_access_state, NULL); static ssize_t sdev_show_preferred_path(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); if (!sdev->handler) return -EINVAL; if (sdev->access_state & SCSI_ACCESS_STATE_PREFERRED) return sprintf(buf, "1\n"); else return sprintf(buf, "0\n"); } static DEVICE_ATTR(preferred_path, S_IRUGO, sdev_show_preferred_path, NULL); #endif 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 int period; if (kstrtouint(buf, 10, &period)) return -EINVAL; sdev->queue_ramp_up_period = msecs_to_jiffies(period); return count; } static DEVICE_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_show_cdl_enable(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); return sysfs_emit(buf, "%d\n", (int)sdev->cdl_enable); } static ssize_t sdev_store_cdl_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int ret; bool v; if (kstrtobool(buf, &v)) return -EINVAL; ret = scsi_cdl_enable(to_scsi_device(dev), v); if (ret) return ret; return count; } static DEVICE_ATTR(cdl_enable, S_IRUGO | S_IWUSR, sdev_show_cdl_enable, sdev_store_cdl_enable); static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, struct attribute *attr, int i) { struct device *dev = kobj_to_dev(kobj); struct scsi_device *sdev = to_scsi_device(dev); if (attr == &dev_attr_queue_depth.attr && !sdev->host->hostt->change_queue_depth) return S_IRUGO; if (attr == &dev_attr_queue_ramp_up_period.attr && !sdev->host->hostt->change_queue_depth) return 0; return attr->mode; } static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj, struct bin_attribute *attr, int i) { struct device *dev = kobj_to_dev(kobj); struct scsi_device *sdev = to_scsi_device(dev); if (attr == &dev_attr_vpd_pg0 && !sdev->vpd_pg0) return 0; if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80) return 0; if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83) return 0; if (attr == &dev_attr_vpd_pg89 && !sdev->vpd_pg89) return 0; if (attr == &dev_attr_vpd_pgb0 && !sdev->vpd_pgb0) return 0; if (attr == &dev_attr_vpd_pgb1 && !sdev->vpd_pgb1) return 0; if (attr == &dev_attr_vpd_pgb2 && !sdev->vpd_pgb2) return 0; if (attr == &dev_attr_vpd_pgb7 && !sdev->vpd_pgb7) return 0; return S_IRUGO; } /* 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_device_busy.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_eh_timeout.attr, &dev_attr_iocounterbits.attr, &dev_attr_iorequest_cnt.attr, &dev_attr_iodone_cnt.attr, &dev_attr_ioerr_cnt.attr, &dev_attr_iotmo_cnt.attr, &dev_attr_modalias.attr, &dev_attr_queue_depth.attr, &dev_attr_queue_type.attr, &dev_attr_wwid.attr, &dev_attr_blacklist.attr, #ifdef CONFIG_SCSI_DH &dev_attr_dh_state.attr, &dev_attr_access_state.attr, &dev_attr_preferred_path.attr, #endif &dev_attr_queue_ramp_up_period.attr, &dev_attr_cdl_supported.attr, &dev_attr_cdl_enable.attr, REF_EVT(media_change), REF_EVT(inquiry_change_reported), REF_EVT(capacity_change_reported), REF_EVT(soft_threshold_reached), REF_EVT(mode_parameter_change_reported), REF_EVT(lun_change_reported), NULL }; static struct bin_attribute *scsi_sdev_bin_attrs[] = { &dev_attr_vpd_pg0, &dev_attr_vpd_pg83, &dev_attr_vpd_pg80, &dev_attr_vpd_pg89, &dev_attr_vpd_pgb0, &dev_attr_vpd_pgb1, &dev_attr_vpd_pgb2, &dev_attr_vpd_pgb7, &dev_attr_inquiry, NULL }; static struct attribute_group scsi_sdev_attr_group = { .attrs = scsi_sdev_attrs, .bin_attrs = scsi_sdev_bin_attrs, .is_visible = scsi_sdev_attr_is_visible, .is_bin_visible = scsi_sdev_bin_attr_is_visible, }; static const struct attribute_group *scsi_sdev_attr_groups[] = { &scsi_sdev_attr_group, NULL }; 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; } /** * 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; struct scsi_target *starget = sdev->sdev_target; 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); if (!sdev->rpm_autosuspend) pm_runtime_forbid(&sdev->sdev_gendev); pm_runtime_enable(&sdev->sdev_gendev); scsi_autopm_put_target(starget); scsi_autopm_get_device(sdev); scsi_dh_add_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; if (IS_ENABLED(CONFIG_BLK_DEV_BSG)) { sdev->bsg_dev = scsi_bsg_register_queue(sdev); if (IS_ERR(sdev->bsg_dev)) { error = PTR_ERR(sdev->bsg_dev); sdev_printk(KERN_INFO, sdev, "Failed to register bsg queue, errno=%d\n", error); sdev->bsg_dev = NULL; } } scsi_autopm_put_device(sdev); return error; } void __scsi_remove_device(struct scsi_device *sdev) { struct device *dev = &sdev->sdev_gendev; int res; /* * This cleanup path is not reentrant and while it is impossible * to get a new reference with scsi_device_get() someone can still * hold a previously acquired one. */ if (sdev->sdev_state == SDEV_DEL) return; if (sdev->is_visible) { /* * If scsi_internal_target_block() is running concurrently, * wait until it has finished before changing the device state. */ mutex_lock(&sdev->state_mutex); /* * If blocked, we go straight to DEL and restart the queue so * any commands issued during driver shutdown (like sync * cache) are errored immediately. */ res = scsi_device_set_state(sdev, SDEV_CANCEL); if (res != 0) { res = scsi_device_set_state(sdev, SDEV_DEL); if (res == 0) scsi_start_queue(sdev); } mutex_unlock(&sdev->state_mutex); if (res != 0) return; if (IS_ENABLED(CONFIG_BLK_DEV_BSG) && sdev->bsg_dev) bsg_unregister_queue(sdev->bsg_dev); device_unregister(&sdev->sdev_dev); transport_remove_device(dev); device_del(dev); } else put_device(&sdev->sdev_dev); /* * Stop accepting new requests and wait until all queuecommand() and * scsi_run_queue() invocations have finished before tearing down the * device. */ mutex_lock(&sdev->state_mutex); scsi_device_set_state(sdev, SDEV_DEL); mutex_unlock(&sdev->state_mutex); blk_mq_destroy_queue(sdev->request_queue); kref_put(&sdev->host->tagset_refcnt, scsi_mq_free_tags); cancel_work_sync(&sdev->requeue_work); if (sdev->host->hostt->slave_destroy) sdev->host->hostt->slave_destroy(sdev); transport_destroy_device(dev); /* * Paired with the kref_get() in scsi_sysfs_initialize(). We have * removed sysfs visibility from the device, so make the target * invisible if this was the last device underneath it. */ scsi_target_reap(scsi_target(sdev)); 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); restart: list_for_each_entry(sdev, &shost->__devices, siblings) { /* * We cannot call scsi_device_get() here, as * we might've been called from rmmod() causing * scsi_device_get() to fail the module_is_live() * check. */ if (sdev->channel != starget->channel || sdev->id != starget->id) continue; if (sdev->sdev_state == SDEV_DEL || sdev->sdev_state == SDEV_CANCEL || !get_device(&sdev->sdev_gendev)) continue; spin_unlock_irqrestore(shost->host_lock, flags); scsi_remove_device(sdev); put_device(&sdev->sdev_gendev); spin_lock_irqsave(shost->host_lock, flags); goto restart; } spin_unlock_irqrestore(shost->host_lock, flags); } /** * 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) { struct Scsi_Host *shost = dev_to_shost(dev->parent); struct scsi_target *starget; unsigned long flags; restart: spin_lock_irqsave(shost->host_lock, flags); list_for_each_entry(starget, &shost->__targets, siblings) { if (starget->state == STARGET_DEL || starget->state == STARGET_REMOVE || starget->state == STARGET_CREATED_REMOVE) continue; if (starget->dev.parent == dev || &starget->dev == dev) { kref_get(&starget->reap_ref); if (starget->state == STARGET_CREATED) starget->state = STARGET_CREATED_REMOVE; else starget->state = STARGET_REMOVE; spin_unlock_irqrestore(shost->host_lock, flags); __scsi_remove_target(starget); scsi_target_reap(starget); goto restart; } } spin_unlock_irqrestore(shost->host_lock, flags); } EXPORT_SYMBOL(scsi_remove_target); int __scsi_register_driver(struct device_driver *drv, struct module *owner) { drv->bus = &scsi_bus_type; drv->owner = owner; 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) { transport_register_device(&shost->shost_gendev); transport_configure_device(&shost->shost_gendev); return 0; } static const 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; const struct scsi_host_template *hostt = shost->hostt; 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; scsi_enable_async_suspend(&sdev->sdev_gendev); dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu", sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); sdev->sdev_gendev.groups = hostt->sdev_groups; 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:%llu", sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); /* * Get a default scsi_level from the target (derived from sibling * devices). This is the best we can do for guessing how to set * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the * setting doesn't matter, because all the bits are zero anyway. * But it does matter for higher LUNs. */ sdev->scsi_level = starget->scsi_level; if (sdev->scsi_level <= SCSI_2 && sdev->scsi_level != SCSI_UNKNOWN && !shost->no_scsi2_lun_in_cdb) sdev->lun_in_cdb = 1; 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); /* * device can now only be removed via __scsi_remove_device() so hold * the target. Target will be held in CREATED state until something * beneath it becomes visible (in which case it moves to RUNNING) */ kref_get(&starget->reap_ref); } 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, }, }, }, };
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