![Alan Stern](/assets/img/avatar_default.png)
Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
1086 lines
27 KiB
C
1086 lines
27 KiB
C
/*
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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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#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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#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_transport.h>
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#include <scsi/scsi_driver.h>
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#include "scsi_priv.h"
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#include "scsi_logging.h"
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static struct device_type scsi_dev_type;
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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_BLOCK, "blocked" },
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{ SDEV_CREATED_BLOCK, "created-blocked" },
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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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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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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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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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static int check_set(unsigned int *val, char *src)
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{
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char *last;
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if (strncmp(src, "-", 20) == 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_strtoul(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[15], junk;
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unsigned int channel, id, lun;
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int res;
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res = sscanf(str, "%10s %10s %10s %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, 1);
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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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#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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* Create the actual show/store functions and data structures.
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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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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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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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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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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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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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if (mode & MODE_INITIATOR)
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len = sprintf(buf, "%s", "Initiator");
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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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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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shost_rd_attr(unique_id, "%u\n");
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shost_rd_attr(host_busy, "%hu\n");
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shost_rd_attr(cmd_per_lun, "%hd\n");
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shost_rd_attr(can_queue, "%hd\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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static struct attribute *scsi_sysfs_shost_attrs[] = {
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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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NULL
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};
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struct attribute_group scsi_shost_attr_group = {
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.attrs = scsi_sysfs_shost_attrs,
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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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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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sdev = class_to_sdev(class_dev);
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put_device(&sdev->sdev_gendev);
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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 scsi_target *starget;
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struct list_head *this, *tmp;
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unsigned long flags;
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sdev = container_of(work, struct scsi_device, ew.work);
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parent = sdev->sdev_gendev.parent;
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starget = to_scsi_target(parent);
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spin_lock_irqsave(sdev->host->host_lock, flags);
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starget->reap_ref++;
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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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list_for_each_safe(this, tmp, &sdev->event_list) {
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struct scsi_event *evt;
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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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if (sdev->request_queue) {
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sdev->request_queue->queuedata = NULL;
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/* user context needed to free queue */
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scsi_free_queue(sdev->request_queue);
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/* temporary expedient, try to catch use of queue lock
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* after free of sdev */
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sdev->request_queue = NULL;
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}
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scsi_target_reap(scsi_target(sdev));
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kfree(sdev->inquiry);
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kfree(sdev);
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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)
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{
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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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};
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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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{
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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)
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return 0;
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return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
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}
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static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
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{
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struct scsi_device *sdev;
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if (dev->type != &scsi_dev_type)
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return 0;
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sdev = to_scsi_device(dev);
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add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type);
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return 0;
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}
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struct bus_type scsi_bus_type = {
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.name = "scsi",
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.match = scsi_bus_match,
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.uevent = scsi_bus_uevent,
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#ifdef CONFIG_PM_OPS
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.pm = &scsi_bus_pm_ops,
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#endif
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};
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EXPORT_SYMBOL_GPL(scsi_bus_type);
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int scsi_sysfs_register(void)
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{
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int error;
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error = bus_register(&scsi_bus_type);
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if (!error) {
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error = class_register(&sdev_class);
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if (error)
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bus_unregister(&scsi_bus_type);
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}
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return error;
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}
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void scsi_sysfs_unregister(void)
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{
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class_unregister(&sdev_class);
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bus_unregister(&scsi_bus_type);
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}
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/*
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* sdev_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 sdev_show_function(field, format_string) \
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static ssize_t \
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sdev_show_##field (struct device *dev, struct device_attribute *attr, \
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char *buf) \
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{ \
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struct scsi_device *sdev; \
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sdev = to_scsi_device(dev); \
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return snprintf (buf, 20, format_string, sdev->field); \
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} \
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/*
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* sdev_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 sdev_rd_attr(field, format_string) \
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sdev_show_function(field, format_string) \
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static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL);
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/*
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* sdev_rw_attr: create a function and attribute variable for a
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* read/write field.
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*/
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#define sdev_rw_attr(field, format_string) \
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sdev_show_function(field, format_string) \
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\
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static ssize_t \
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sdev_store_##field (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_device *sdev; \
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sdev = to_scsi_device(dev); \
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sscanf (buf, format_string, &sdev->field); \
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return count; \
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} \
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static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
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/* Currently we don't export bit fields, but we might in future,
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* so leave this code in */
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#if 0
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/*
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* sdev_rd_attr: create a function and attribute variable for a
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* read/write bit field.
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*/
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#define sdev_rw_attr_bit(field) \
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sdev_show_function(field, "%d\n") \
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\
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static ssize_t \
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sdev_store_##field (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 ret; \
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struct scsi_device *sdev; \
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ret = scsi_sdev_check_buf_bit(buf); \
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if (ret >= 0) { \
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sdev = to_scsi_device(dev); \
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sdev->field = ret; \
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ret = count; \
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} \
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return ret; \
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} \
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static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
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/*
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* scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
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* else return -EINVAL.
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*/
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static int scsi_sdev_check_buf_bit(const char *buf)
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{
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if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
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if (buf[0] == '1')
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return 1;
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else if (buf[0] == '0')
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return 0;
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else
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return -EINVAL;
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} else
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return -EINVAL;
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}
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#endif
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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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sdev_rd_attr (device_blocked, "%d\n");
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sdev_rd_attr (queue_depth, "%d\n");
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sdev_rd_attr (type, "%d\n");
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sdev_rd_attr (scsi_level, "%d\n");
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sdev_rd_attr (vendor, "%.8s\n");
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sdev_rd_attr (model, "%.16s\n");
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sdev_rd_attr (rev, "%.4s\n");
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/*
|
|
* TODO: can we make these symlinks to the block layer ones?
|
|
*/
|
|
static ssize_t
|
|
sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct scsi_device *sdev;
|
|
sdev = to_scsi_device(dev);
|
|
return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
|
|
}
|
|
|
|
static ssize_t
|
|
sdev_store_timeout (struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_device *sdev;
|
|
int timeout;
|
|
sdev = to_scsi_device(dev);
|
|
sscanf (buf, "%d\n", &timeout);
|
|
blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
|
|
|
|
static ssize_t
|
|
store_rescan_field (struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
scsi_rescan_device(dev);
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
|
|
|
|
static void sdev_store_delete_callback(struct device *dev)
|
|
{
|
|
scsi_remove_device(to_scsi_device(dev));
|
|
}
|
|
|
|
static ssize_t
|
|
sdev_store_delete(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int rc;
|
|
|
|
/* An attribute cannot be unregistered by one of its own methods,
|
|
* so we have to use this roundabout approach.
|
|
*/
|
|
rc = device_schedule_callback(dev, sdev_store_delete_callback);
|
|
if (rc)
|
|
count = rc;
|
|
return count;
|
|
};
|
|
static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
|
|
|
|
static ssize_t
|
|
store_state_field(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int i;
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
enum scsi_device_state state = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
|
|
const int len = strlen(sdev_states[i].name);
|
|
if (strncmp(sdev_states[i].name, buf, len) == 0 &&
|
|
buf[len] == '\n') {
|
|
state = sdev_states[i].value;
|
|
break;
|
|
}
|
|
}
|
|
if (!state)
|
|
return -EINVAL;
|
|
|
|
if (scsi_device_set_state(sdev, state))
|
|
return -EINVAL;
|
|
return count;
|
|
}
|
|
|
|
static ssize_t
|
|
show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
const char *name = scsi_device_state_name(sdev->sdev_state);
|
|
|
|
if (!name)
|
|
return -EINVAL;
|
|
|
|
return snprintf(buf, 20, "%s\n", name);
|
|
}
|
|
|
|
static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
|
|
|
|
static ssize_t
|
|
show_queue_type_field(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
const char *name = "none";
|
|
|
|
if (sdev->ordered_tags)
|
|
name = "ordered";
|
|
else if (sdev->simple_tags)
|
|
name = "simple";
|
|
|
|
return snprintf(buf, 20, "%s\n", name);
|
|
}
|
|
|
|
static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
|
|
|
|
static ssize_t
|
|
show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
|
|
}
|
|
|
|
static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
|
|
|
|
#define show_sdev_iostat(field) \
|
|
static ssize_t \
|
|
show_iostat_##field(struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
unsigned long long count = atomic_read(&sdev->field); \
|
|
return snprintf(buf, 20, "0x%llx\n", count); \
|
|
} \
|
|
static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
|
|
|
|
show_sdev_iostat(iorequest_cnt);
|
|
show_sdev_iostat(iodone_cnt);
|
|
show_sdev_iostat(ioerr_cnt);
|
|
|
|
static ssize_t
|
|
sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct scsi_device *sdev;
|
|
sdev = to_scsi_device(dev);
|
|
return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
|
|
}
|
|
static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
|
|
|
|
#define DECLARE_EVT_SHOW(name, Cap_name) \
|
|
static ssize_t \
|
|
sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
|
|
return snprintf(buf, 20, "%d\n", val); \
|
|
}
|
|
|
|
#define DECLARE_EVT_STORE(name, Cap_name) \
|
|
static ssize_t \
|
|
sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
int val = simple_strtoul(buf, NULL, 0); \
|
|
if (val == 0) \
|
|
clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
|
|
else if (val == 1) \
|
|
set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
|
|
else \
|
|
return -EINVAL; \
|
|
return count; \
|
|
}
|
|
|
|
#define DECLARE_EVT(name, Cap_name) \
|
|
DECLARE_EVT_SHOW(name, Cap_name) \
|
|
DECLARE_EVT_STORE(name, Cap_name) \
|
|
static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
|
|
sdev_store_evt_##name);
|
|
#define REF_EVT(name) &dev_attr_evt_##name.attr
|
|
|
|
DECLARE_EVT(media_change, MEDIA_CHANGE)
|
|
|
|
/* Default template for device attributes. May NOT be modified */
|
|
static struct attribute *scsi_sdev_attrs[] = {
|
|
&dev_attr_device_blocked.attr,
|
|
&dev_attr_type.attr,
|
|
&dev_attr_scsi_level.attr,
|
|
&dev_attr_vendor.attr,
|
|
&dev_attr_model.attr,
|
|
&dev_attr_rev.attr,
|
|
&dev_attr_rescan.attr,
|
|
&dev_attr_delete.attr,
|
|
&dev_attr_state.attr,
|
|
&dev_attr_timeout.attr,
|
|
&dev_attr_iocounterbits.attr,
|
|
&dev_attr_iorequest_cnt.attr,
|
|
&dev_attr_iodone_cnt.attr,
|
|
&dev_attr_ioerr_cnt.attr,
|
|
&dev_attr_modalias.attr,
|
|
REF_EVT(media_change),
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group scsi_sdev_attr_group = {
|
|
.attrs = scsi_sdev_attrs,
|
|
};
|
|
|
|
static const struct attribute_group *scsi_sdev_attr_groups[] = {
|
|
&scsi_sdev_attr_group,
|
|
NULL
|
|
};
|
|
|
|
static ssize_t
|
|
sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int depth, retval;
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
struct scsi_host_template *sht = sdev->host->hostt;
|
|
|
|
if (!sht->change_queue_depth)
|
|
return -EINVAL;
|
|
|
|
depth = simple_strtoul(buf, NULL, 0);
|
|
|
|
if (depth < 1)
|
|
return -EINVAL;
|
|
|
|
retval = sht->change_queue_depth(sdev, depth,
|
|
SCSI_QDEPTH_DEFAULT);
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
sdev->max_queue_depth = sdev->queue_depth;
|
|
|
|
return count;
|
|
}
|
|
|
|
static struct device_attribute sdev_attr_queue_depth_rw =
|
|
__ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
|
|
sdev_store_queue_depth_rw);
|
|
|
|
static ssize_t
|
|
sdev_show_queue_ramp_up_period(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_device *sdev;
|
|
sdev = to_scsi_device(dev);
|
|
return snprintf(buf, 20, "%u\n",
|
|
jiffies_to_msecs(sdev->queue_ramp_up_period));
|
|
}
|
|
|
|
static ssize_t
|
|
sdev_store_queue_ramp_up_period(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
unsigned long period;
|
|
|
|
if (strict_strtoul(buf, 10, &period))
|
|
return -EINVAL;
|
|
|
|
sdev->queue_ramp_up_period = msecs_to_jiffies(period);
|
|
return period;
|
|
}
|
|
|
|
static struct device_attribute sdev_attr_queue_ramp_up_period =
|
|
__ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
|
|
sdev_show_queue_ramp_up_period,
|
|
sdev_store_queue_ramp_up_period);
|
|
|
|
static ssize_t
|
|
sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
struct scsi_host_template *sht = sdev->host->hostt;
|
|
int tag_type = 0, retval;
|
|
int prev_tag_type = scsi_get_tag_type(sdev);
|
|
|
|
if (!sdev->tagged_supported || !sht->change_queue_type)
|
|
return -EINVAL;
|
|
|
|
if (strncmp(buf, "ordered", 7) == 0)
|
|
tag_type = MSG_ORDERED_TAG;
|
|
else if (strncmp(buf, "simple", 6) == 0)
|
|
tag_type = MSG_SIMPLE_TAG;
|
|
else if (strncmp(buf, "none", 4) != 0)
|
|
return -EINVAL;
|
|
|
|
if (tag_type == prev_tag_type)
|
|
return count;
|
|
|
|
retval = sht->change_queue_type(sdev, tag_type);
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
return count;
|
|
}
|
|
|
|
static int scsi_target_add(struct scsi_target *starget)
|
|
{
|
|
int error;
|
|
|
|
if (starget->state != STARGET_CREATED)
|
|
return 0;
|
|
|
|
error = device_add(&starget->dev);
|
|
if (error) {
|
|
dev_err(&starget->dev, "target device_add failed, error %d\n", error);
|
|
return error;
|
|
}
|
|
transport_add_device(&starget->dev);
|
|
starget->state = STARGET_RUNNING;
|
|
|
|
pm_runtime_set_active(&starget->dev);
|
|
pm_runtime_enable(&starget->dev);
|
|
device_enable_async_suspend(&starget->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct device_attribute sdev_attr_queue_type_rw =
|
|
__ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field,
|
|
sdev_store_queue_type_rw);
|
|
|
|
/**
|
|
* scsi_sysfs_add_sdev - add scsi device to sysfs
|
|
* @sdev: scsi_device to add
|
|
*
|
|
* Return value:
|
|
* 0 on Success / non-zero on Failure
|
|
**/
|
|
int scsi_sysfs_add_sdev(struct scsi_device *sdev)
|
|
{
|
|
int error, i;
|
|
struct request_queue *rq = sdev->request_queue;
|
|
struct scsi_target *starget = sdev->sdev_target;
|
|
|
|
error = scsi_device_set_state(sdev, SDEV_RUNNING);
|
|
if (error)
|
|
return error;
|
|
|
|
error = scsi_target_add(starget);
|
|
if (error)
|
|
return error;
|
|
|
|
transport_configure_device(&starget->dev);
|
|
|
|
device_enable_async_suspend(&sdev->sdev_gendev);
|
|
scsi_autopm_get_target(starget);
|
|
pm_runtime_set_active(&sdev->sdev_gendev);
|
|
pm_runtime_forbid(&sdev->sdev_gendev);
|
|
pm_runtime_enable(&sdev->sdev_gendev);
|
|
scsi_autopm_put_target(starget);
|
|
|
|
/* The following call will keep sdev active indefinitely, until
|
|
* its driver does a corresponding scsi_autopm_pm_device(). Only
|
|
* drivers supporting autosuspend will do this.
|
|
*/
|
|
scsi_autopm_get_device(sdev);
|
|
|
|
error = device_add(&sdev->sdev_gendev);
|
|
if (error) {
|
|
printk(KERN_INFO "error 1\n");
|
|
return error;
|
|
}
|
|
device_enable_async_suspend(&sdev->sdev_dev);
|
|
error = device_add(&sdev->sdev_dev);
|
|
if (error) {
|
|
printk(KERN_INFO "error 2\n");
|
|
device_del(&sdev->sdev_gendev);
|
|
return error;
|
|
}
|
|
transport_add_device(&sdev->sdev_gendev);
|
|
sdev->is_visible = 1;
|
|
|
|
/* create queue files, which may be writable, depending on the host */
|
|
if (sdev->host->hostt->change_queue_depth) {
|
|
error = device_create_file(&sdev->sdev_gendev,
|
|
&sdev_attr_queue_depth_rw);
|
|
error = device_create_file(&sdev->sdev_gendev,
|
|
&sdev_attr_queue_ramp_up_period);
|
|
}
|
|
else
|
|
error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
|
|
if (error)
|
|
return error;
|
|
|
|
if (sdev->host->hostt->change_queue_type)
|
|
error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw);
|
|
else
|
|
error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type);
|
|
if (error)
|
|
return error;
|
|
|
|
error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL);
|
|
|
|
if (error)
|
|
/* we're treating error on bsg register as non-fatal,
|
|
* so pretend nothing went wrong */
|
|
sdev_printk(KERN_INFO, sdev,
|
|
"Failed to register bsg queue, errno=%d\n", error);
|
|
|
|
/* add additional host specific attributes */
|
|
if (sdev->host->hostt->sdev_attrs) {
|
|
for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) {
|
|
error = device_create_file(&sdev->sdev_gendev,
|
|
sdev->host->hostt->sdev_attrs[i]);
|
|
if (error)
|
|
return error;
|
|
}
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
void __scsi_remove_device(struct scsi_device *sdev)
|
|
{
|
|
struct device *dev = &sdev->sdev_gendev;
|
|
|
|
if (sdev->is_visible) {
|
|
if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0)
|
|
return;
|
|
|
|
bsg_unregister_queue(sdev->request_queue);
|
|
device_unregister(&sdev->sdev_dev);
|
|
transport_remove_device(dev);
|
|
device_del(dev);
|
|
} else
|
|
put_device(&sdev->sdev_dev);
|
|
scsi_device_set_state(sdev, SDEV_DEL);
|
|
if (sdev->host->hostt->slave_destroy)
|
|
sdev->host->hostt->slave_destroy(sdev);
|
|
transport_destroy_device(dev);
|
|
put_device(dev);
|
|
}
|
|
|
|
/**
|
|
* scsi_remove_device - unregister a device from the scsi bus
|
|
* @sdev: scsi_device to unregister
|
|
**/
|
|
void scsi_remove_device(struct scsi_device *sdev)
|
|
{
|
|
struct Scsi_Host *shost = sdev->host;
|
|
|
|
mutex_lock(&shost->scan_mutex);
|
|
__scsi_remove_device(sdev);
|
|
mutex_unlock(&shost->scan_mutex);
|
|
}
|
|
EXPORT_SYMBOL(scsi_remove_device);
|
|
|
|
static void __scsi_remove_target(struct scsi_target *starget)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
|
|
unsigned long flags;
|
|
struct scsi_device *sdev;
|
|
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
starget->reap_ref++;
|
|
restart:
|
|
list_for_each_entry(sdev, &shost->__devices, siblings) {
|
|
if (sdev->channel != starget->channel ||
|
|
sdev->id != starget->id ||
|
|
scsi_device_get(sdev))
|
|
continue;
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
scsi_remove_device(sdev);
|
|
scsi_device_put(sdev);
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
goto restart;
|
|
}
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
scsi_target_reap(starget);
|
|
}
|
|
|
|
static int __remove_child (struct device * dev, void * data)
|
|
{
|
|
if (scsi_is_target_device(dev))
|
|
__scsi_remove_target(to_scsi_target(dev));
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* scsi_remove_target - try to remove a target and all its devices
|
|
* @dev: generic starget or parent of generic stargets to be removed
|
|
*
|
|
* Note: This is slightly racy. It is possible that if the user
|
|
* requests the addition of another device then the target won't be
|
|
* removed.
|
|
*/
|
|
void scsi_remove_target(struct device *dev)
|
|
{
|
|
if (scsi_is_target_device(dev)) {
|
|
__scsi_remove_target(to_scsi_target(dev));
|
|
return;
|
|
}
|
|
|
|
get_device(dev);
|
|
device_for_each_child(dev, NULL, __remove_child);
|
|
put_device(dev);
|
|
}
|
|
EXPORT_SYMBOL(scsi_remove_target);
|
|
|
|
int scsi_register_driver(struct device_driver *drv)
|
|
{
|
|
drv->bus = &scsi_bus_type;
|
|
|
|
return driver_register(drv);
|
|
}
|
|
EXPORT_SYMBOL(scsi_register_driver);
|
|
|
|
int scsi_register_interface(struct class_interface *intf)
|
|
{
|
|
intf->class = &sdev_class;
|
|
|
|
return class_interface_register(intf);
|
|
}
|
|
EXPORT_SYMBOL(scsi_register_interface);
|
|
|
|
/**
|
|
* scsi_sysfs_add_host - add scsi host to subsystem
|
|
* @shost: scsi host struct to add to subsystem
|
|
**/
|
|
int scsi_sysfs_add_host(struct Scsi_Host *shost)
|
|
{
|
|
int error, i;
|
|
|
|
/* add host specific attributes */
|
|
if (shost->hostt->shost_attrs) {
|
|
for (i = 0; shost->hostt->shost_attrs[i]; i++) {
|
|
error = device_create_file(&shost->shost_dev,
|
|
shost->hostt->shost_attrs[i]);
|
|
if (error)
|
|
return error;
|
|
}
|
|
}
|
|
|
|
transport_register_device(&shost->shost_gendev);
|
|
transport_configure_device(&shost->shost_gendev);
|
|
return 0;
|
|
}
|
|
|
|
static struct device_type scsi_dev_type = {
|
|
.name = "scsi_device",
|
|
.release = scsi_device_dev_release,
|
|
.groups = scsi_sdev_attr_groups,
|
|
};
|
|
|
|
void scsi_sysfs_device_initialize(struct scsi_device *sdev)
|
|
{
|
|
unsigned long flags;
|
|
struct Scsi_Host *shost = sdev->host;
|
|
struct scsi_target *starget = sdev->sdev_target;
|
|
|
|
device_initialize(&sdev->sdev_gendev);
|
|
sdev->sdev_gendev.bus = &scsi_bus_type;
|
|
sdev->sdev_gendev.type = &scsi_dev_type;
|
|
dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d",
|
|
sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
|
|
|
|
device_initialize(&sdev->sdev_dev);
|
|
sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev);
|
|
sdev->sdev_dev.class = &sdev_class;
|
|
dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
|
|
sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
|
|
sdev->scsi_level = starget->scsi_level;
|
|
transport_setup_device(&sdev->sdev_gendev);
|
|
spin_lock_irqsave(shost->host_lock, flags);
|
|
list_add_tail(&sdev->same_target_siblings, &starget->devices);
|
|
list_add_tail(&sdev->siblings, &shost->__devices);
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
}
|
|
|
|
int scsi_is_sdev_device(const struct device *dev)
|
|
{
|
|
return dev->type == &scsi_dev_type;
|
|
}
|
|
EXPORT_SYMBOL(scsi_is_sdev_device);
|
|
|
|
/* A blank transport template that is used in drivers that don't
|
|
* yet implement Transport Attributes */
|
|
struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, };
|