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1647 lines
42 KiB
1647 lines
42 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* scsi_sysfs.c |
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* |
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* SCSI sysfs interface routines. |
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* |
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* Created to pull SCSI mid layer sysfs routines into one file. |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/init.h> |
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#include <linux/blkdev.h> |
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#include <linux/device.h> |
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#include <linux/pm_runtime.h> |
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|
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#include <scsi/scsi.h> |
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#include <scsi/scsi_device.h> |
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#include <scsi/scsi_host.h> |
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#include <scsi/scsi_tcq.h> |
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#include <scsi/scsi_dh.h> |
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#include <scsi/scsi_transport.h> |
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#include <scsi/scsi_driver.h> |
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#include <scsi/scsi_devinfo.h> |
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|
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#include "scsi_priv.h" |
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#include "scsi_logging.h" |
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|
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static struct device_type scsi_dev_type; |
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|
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static const struct { |
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enum scsi_device_state value; |
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char *name; |
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} sdev_states[] = { |
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{ SDEV_CREATED, "created" }, |
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{ SDEV_RUNNING, "running" }, |
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{ SDEV_CANCEL, "cancel" }, |
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{ SDEV_DEL, "deleted" }, |
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{ SDEV_QUIESCE, "quiesce" }, |
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{ SDEV_OFFLINE, "offline" }, |
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{ SDEV_TRANSPORT_OFFLINE, "transport-offline" }, |
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{ SDEV_BLOCK, "blocked" }, |
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{ SDEV_CREATED_BLOCK, "created-blocked" }, |
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}; |
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|
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const char *scsi_device_state_name(enum scsi_device_state state) |
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{ |
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int i; |
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char *name = NULL; |
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|
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for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
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if (sdev_states[i].value == state) { |
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name = sdev_states[i].name; |
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break; |
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} |
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} |
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return name; |
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} |
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|
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static const struct { |
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enum scsi_host_state value; |
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char *name; |
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} shost_states[] = { |
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{ SHOST_CREATED, "created" }, |
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{ SHOST_RUNNING, "running" }, |
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{ SHOST_CANCEL, "cancel" }, |
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{ SHOST_DEL, "deleted" }, |
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{ SHOST_RECOVERY, "recovery" }, |
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{ SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
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{ SHOST_DEL_RECOVERY, "deleted/recovery", }, |
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}; |
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const char *scsi_host_state_name(enum scsi_host_state state) |
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{ |
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int i; |
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char *name = NULL; |
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|
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for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
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if (shost_states[i].value == state) { |
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name = shost_states[i].name; |
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break; |
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} |
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} |
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return name; |
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} |
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|
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#ifdef CONFIG_SCSI_DH |
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static const struct { |
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unsigned char value; |
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char *name; |
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} sdev_access_states[] = { |
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{ SCSI_ACCESS_STATE_OPTIMAL, "active/optimized" }, |
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{ SCSI_ACCESS_STATE_ACTIVE, "active/non-optimized" }, |
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{ SCSI_ACCESS_STATE_STANDBY, "standby" }, |
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{ SCSI_ACCESS_STATE_UNAVAILABLE, "unavailable" }, |
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{ SCSI_ACCESS_STATE_LBA, "lba-dependent" }, |
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{ SCSI_ACCESS_STATE_OFFLINE, "offline" }, |
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{ SCSI_ACCESS_STATE_TRANSITIONING, "transitioning" }, |
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}; |
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|
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static const char *scsi_access_state_name(unsigned char state) |
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{ |
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int i; |
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char *name = NULL; |
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|
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for (i = 0; i < ARRAY_SIZE(sdev_access_states); i++) { |
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if (sdev_access_states[i].value == state) { |
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name = sdev_access_states[i].name; |
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break; |
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} |
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} |
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return name; |
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} |
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#endif |
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|
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static int check_set(unsigned long long *val, char *src) |
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{ |
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char *last; |
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|
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if (strcmp(src, "-") == 0) { |
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*val = SCAN_WILD_CARD; |
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} else { |
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/* |
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* Doesn't check for int overflow |
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*/ |
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*val = simple_strtoull(src, &last, 0); |
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if (*last != '\0') |
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return 1; |
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} |
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return 0; |
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} |
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static int scsi_scan(struct Scsi_Host *shost, const char *str) |
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{ |
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char s1[15], s2[15], s3[17], junk; |
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unsigned long long channel, id, lun; |
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int res; |
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|
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res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk); |
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if (res != 3) |
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return -EINVAL; |
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if (check_set(&channel, s1)) |
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return -EINVAL; |
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if (check_set(&id, s2)) |
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return -EINVAL; |
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if (check_set(&lun, s3)) |
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return -EINVAL; |
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if (shost->transportt->user_scan) |
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res = shost->transportt->user_scan(shost, channel, id, lun); |
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else |
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res = scsi_scan_host_selected(shost, channel, id, lun, |
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SCSI_SCAN_MANUAL); |
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return res; |
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} |
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/* |
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* shost_show_function: macro to create an attr function that can be used to |
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* show a non-bit field. |
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*/ |
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#define shost_show_function(name, field, format_string) \ |
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static ssize_t \ |
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show_##name (struct device *dev, struct device_attribute *attr, \ |
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char *buf) \ |
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{ \ |
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struct Scsi_Host *shost = class_to_shost(dev); \ |
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return snprintf (buf, 20, format_string, shost->field); \ |
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} |
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/* |
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* shost_rd_attr: macro to create a function and attribute variable for a |
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* read only field. |
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*/ |
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#define shost_rd_attr2(name, field, format_string) \ |
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shost_show_function(name, field, format_string) \ |
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static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
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|
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#define shost_rd_attr(field, format_string) \ |
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shost_rd_attr2(field, field, format_string) |
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|
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/* |
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* Create the actual show/store functions and data structures. |
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*/ |
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|
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static ssize_t |
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store_scan(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct Scsi_Host *shost = class_to_shost(dev); |
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int res; |
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res = scsi_scan(shost, buf); |
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if (res == 0) |
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res = count; |
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return res; |
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}; |
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static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
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|
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static ssize_t |
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store_shost_state(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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int i; |
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struct Scsi_Host *shost = class_to_shost(dev); |
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enum scsi_host_state state = 0; |
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|
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for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
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const int len = strlen(shost_states[i].name); |
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if (strncmp(shost_states[i].name, buf, len) == 0 && |
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buf[len] == '\n') { |
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state = shost_states[i].value; |
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break; |
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} |
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} |
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if (!state) |
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return -EINVAL; |
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|
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if (scsi_host_set_state(shost, state)) |
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return -EINVAL; |
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return count; |
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} |
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static ssize_t |
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show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
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{ |
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struct Scsi_Host *shost = class_to_shost(dev); |
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const char *name = scsi_host_state_name(shost->shost_state); |
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if (!name) |
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return -EINVAL; |
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return snprintf(buf, 20, "%s\n", name); |
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} |
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/* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
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static struct device_attribute dev_attr_hstate = |
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__ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); |
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|
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static ssize_t |
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show_shost_mode(unsigned int mode, char *buf) |
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{ |
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ssize_t len = 0; |
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|
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if (mode & MODE_INITIATOR) |
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len = sprintf(buf, "%s", "Initiator"); |
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|
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if (mode & MODE_TARGET) |
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len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); |
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len += sprintf(buf + len, "\n"); |
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return len; |
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} |
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static ssize_t |
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show_shost_supported_mode(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct Scsi_Host *shost = class_to_shost(dev); |
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unsigned int supported_mode = shost->hostt->supported_mode; |
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|
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if (supported_mode == MODE_UNKNOWN) |
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/* by default this should be initiator */ |
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supported_mode = MODE_INITIATOR; |
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return show_shost_mode(supported_mode, buf); |
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} |
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static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
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static ssize_t |
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show_shost_active_mode(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct Scsi_Host *shost = class_to_shost(dev); |
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if (shost->active_mode == MODE_UNKNOWN) |
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return snprintf(buf, 20, "unknown\n"); |
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else |
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return show_shost_mode(shost->active_mode, buf); |
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} |
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static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
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static int check_reset_type(const char *str) |
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{ |
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if (sysfs_streq(str, "adapter")) |
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return SCSI_ADAPTER_RESET; |
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else if (sysfs_streq(str, "firmware")) |
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return SCSI_FIRMWARE_RESET; |
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else |
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return 0; |
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} |
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static ssize_t |
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store_host_reset(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct Scsi_Host *shost = class_to_shost(dev); |
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struct scsi_host_template *sht = shost->hostt; |
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int ret = -EINVAL; |
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int type; |
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type = check_reset_type(buf); |
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if (!type) |
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goto exit_store_host_reset; |
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if (sht->host_reset) |
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ret = sht->host_reset(shost, type); |
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else |
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ret = -EOPNOTSUPP; |
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exit_store_host_reset: |
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if (ret == 0) |
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ret = count; |
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return ret; |
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} |
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static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); |
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static ssize_t |
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show_shost_eh_deadline(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct Scsi_Host *shost = class_to_shost(dev); |
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if (shost->eh_deadline == -1) |
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return snprintf(buf, strlen("off") + 2, "off\n"); |
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return sprintf(buf, "%u\n", shost->eh_deadline / HZ); |
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} |
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static ssize_t |
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store_shost_eh_deadline(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct Scsi_Host *shost = class_to_shost(dev); |
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int ret = -EINVAL; |
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unsigned long deadline, flags; |
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|
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if (shost->transportt && |
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(shost->transportt->eh_strategy_handler || |
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!shost->hostt->eh_host_reset_handler)) |
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return ret; |
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if (!strncmp(buf, "off", strlen("off"))) |
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deadline = -1; |
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else { |
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ret = kstrtoul(buf, 10, &deadline); |
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if (ret) |
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return ret; |
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if (deadline * HZ > UINT_MAX) |
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return -EINVAL; |
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} |
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spin_lock_irqsave(shost->host_lock, flags); |
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if (scsi_host_in_recovery(shost)) |
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ret = -EBUSY; |
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else { |
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if (deadline == -1) |
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shost->eh_deadline = -1; |
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else |
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shost->eh_deadline = deadline * HZ; |
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ret = count; |
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} |
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spin_unlock_irqrestore(shost->host_lock, flags); |
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|
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return ret; |
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} |
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static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); |
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|
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shost_rd_attr(unique_id, "%u\n"); |
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shost_rd_attr(cmd_per_lun, "%hd\n"); |
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shost_rd_attr(can_queue, "%d\n"); |
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shost_rd_attr(sg_tablesize, "%hu\n"); |
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shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
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shost_rd_attr(unchecked_isa_dma, "%d\n"); |
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shost_rd_attr(prot_capabilities, "%u\n"); |
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shost_rd_attr(prot_guard_type, "%hd\n"); |
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shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
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|
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static ssize_t |
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show_host_busy(struct device *dev, struct device_attribute *attr, char *buf) |
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{ |
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struct Scsi_Host *shost = class_to_shost(dev); |
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return snprintf(buf, 20, "%d\n", scsi_host_busy(shost)); |
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} |
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static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL); |
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|
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static ssize_t |
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show_use_blk_mq(struct device *dev, struct device_attribute *attr, char *buf) |
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{ |
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return sprintf(buf, "1\n"); |
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} |
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static DEVICE_ATTR(use_blk_mq, S_IRUGO, show_use_blk_mq, NULL); |
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|
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static ssize_t |
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show_nr_hw_queues(struct device *dev, struct device_attribute *attr, char *buf) |
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{ |
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struct Scsi_Host *shost = class_to_shost(dev); |
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struct blk_mq_tag_set *tag_set = &shost->tag_set; |
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|
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return snprintf(buf, 20, "%d\n", tag_set->nr_hw_queues); |
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} |
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static DEVICE_ATTR(nr_hw_queues, S_IRUGO, show_nr_hw_queues, NULL); |
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|
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static struct attribute *scsi_sysfs_shost_attrs[] = { |
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&dev_attr_use_blk_mq.attr, |
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&dev_attr_unique_id.attr, |
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&dev_attr_host_busy.attr, |
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&dev_attr_cmd_per_lun.attr, |
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&dev_attr_can_queue.attr, |
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&dev_attr_sg_tablesize.attr, |
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&dev_attr_sg_prot_tablesize.attr, |
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&dev_attr_unchecked_isa_dma.attr, |
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&dev_attr_proc_name.attr, |
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&dev_attr_scan.attr, |
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&dev_attr_hstate.attr, |
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&dev_attr_supported_mode.attr, |
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&dev_attr_active_mode.attr, |
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&dev_attr_prot_capabilities.attr, |
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&dev_attr_prot_guard_type.attr, |
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&dev_attr_host_reset.attr, |
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&dev_attr_eh_deadline.attr, |
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&dev_attr_nr_hw_queues.attr, |
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NULL |
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}; |
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|
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static struct attribute_group scsi_shost_attr_group = { |
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.attrs = scsi_sysfs_shost_attrs, |
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}; |
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|
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const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
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&scsi_shost_attr_group, |
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NULL |
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}; |
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|
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static void scsi_device_cls_release(struct device *class_dev) |
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{ |
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struct scsi_device *sdev; |
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|
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sdev = class_to_sdev(class_dev); |
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put_device(&sdev->sdev_gendev); |
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} |
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|
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static void scsi_device_dev_release_usercontext(struct work_struct *work) |
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{ |
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struct scsi_device *sdev; |
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struct device *parent; |
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struct list_head *this, *tmp; |
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struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL; |
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struct scsi_vpd *vpd_pg0 = NULL, *vpd_pg89 = NULL; |
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unsigned long flags; |
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|
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sdev = container_of(work, struct scsi_device, ew.work); |
|
|
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scsi_dh_release_device(sdev); |
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|
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parent = sdev->sdev_gendev.parent; |
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|
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spin_lock_irqsave(sdev->host->host_lock, flags); |
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list_del(&sdev->siblings); |
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list_del(&sdev->same_target_siblings); |
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list_del(&sdev->starved_entry); |
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spin_unlock_irqrestore(sdev->host->host_lock, flags); |
|
|
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cancel_work_sync(&sdev->event_work); |
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|
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list_for_each_safe(this, tmp, &sdev->event_list) { |
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struct scsi_event *evt; |
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|
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evt = list_entry(this, struct scsi_event, node); |
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list_del(&evt->node); |
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kfree(evt); |
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} |
|
|
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blk_put_queue(sdev->request_queue); |
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/* NULL queue means the device can't be used */ |
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sdev->request_queue = NULL; |
|
|
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mutex_lock(&sdev->inquiry_mutex); |
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vpd_pg0 = rcu_replace_pointer(sdev->vpd_pg0, vpd_pg0, |
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lockdep_is_held(&sdev->inquiry_mutex)); |
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vpd_pg80 = rcu_replace_pointer(sdev->vpd_pg80, vpd_pg80, |
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lockdep_is_held(&sdev->inquiry_mutex)); |
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vpd_pg83 = rcu_replace_pointer(sdev->vpd_pg83, vpd_pg83, |
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lockdep_is_held(&sdev->inquiry_mutex)); |
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vpd_pg89 = rcu_replace_pointer(sdev->vpd_pg89, vpd_pg89, |
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lockdep_is_held(&sdev->inquiry_mutex)); |
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mutex_unlock(&sdev->inquiry_mutex); |
|
|
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if (vpd_pg0) |
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kfree_rcu(vpd_pg0, rcu); |
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if (vpd_pg83) |
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kfree_rcu(vpd_pg83, rcu); |
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if (vpd_pg80) |
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kfree_rcu(vpd_pg80, rcu); |
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if (vpd_pg89) |
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kfree_rcu(vpd_pg89, rcu); |
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kfree(sdev->inquiry); |
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kfree(sdev); |
|
|
|
if (parent) |
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put_device(parent); |
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} |
|
|
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static void scsi_device_dev_release(struct device *dev) |
|
{ |
|
struct scsi_device *sdp = to_scsi_device(dev); |
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execute_in_process_context(scsi_device_dev_release_usercontext, |
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&sdp->ew); |
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} |
|
|
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static struct class sdev_class = { |
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.name = "scsi_device", |
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.dev_release = scsi_device_cls_release, |
|
}; |
|
|
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/* all probing is done in the individual ->probe routines */ |
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static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) |
|
{ |
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struct scsi_device *sdp; |
|
|
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if (dev->type != &scsi_dev_type) |
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return 0; |
|
|
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sdp = to_scsi_device(dev); |
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if (sdp->no_uld_attach) |
|
return 0; |
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return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; |
|
} |
|
|
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static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
|
{ |
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struct scsi_device *sdev; |
|
|
|
if (dev->type != &scsi_dev_type) |
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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, |
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#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 (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"); |
|
|
|
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", atomic_read(&sdev->device_busy)); |
|
} |
|
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(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; |
|
|
|
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); |
|
ret = scsi_device_set_state(sdev, state); |
|
/* |
|
* If the device state changes to SDEV_RUNNING, we need to run |
|
* the queue to avoid I/O hang. |
|
*/ |
|
if (ret == 0 && state == SDEV_RUNNING) |
|
blk_mq_run_hw_queues(sdev->request_queue, true); |
|
mutex_unlock(&sdev->state_mutex); |
|
|
|
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(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); |
|
|
|
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); |
|
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 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; |
|
|
|
#ifdef CONFIG_SCSI_DH |
|
if (attr == &dev_attr_access_state.attr && |
|
!sdev->handler) |
|
return 0; |
|
if (attr == &dev_attr_preferred_path.attr && |
|
!sdev->handler) |
|
return 0; |
|
#endif |
|
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; |
|
|
|
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_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, |
|
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_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, i; |
|
struct request_queue *rq = sdev->request_queue; |
|
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; |
|
|
|
error = bsg_scsi_register_queue(rq, &sdev->sdev_gendev); |
|
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; |
|
} |
|
} |
|
|
|
if (sdev->host->hostt->sdev_groups) { |
|
error = sysfs_create_groups(&sdev->sdev_gendev.kobj, |
|
sdev->host->hostt->sdev_groups); |
|
if (error) |
|
return error; |
|
} |
|
|
|
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 (sdev->host->hostt->sdev_groups) |
|
sysfs_remove_groups(&sdev->sdev_gendev.kobj, |
|
sdev->host->hostt->sdev_groups); |
|
|
|
bsg_unregister_queue(sdev->request_queue); |
|
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_cleanup_queue(sdev->request_queue); |
|
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 |
|
* remoed 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) |
|
{ |
|
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:%llu", |
|
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:%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, }, }, }, };
|
|
|