mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:26:42 +07:00
5a0e3ad6af
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
1116 lines
28 KiB
C
1116 lines
28 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 <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(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_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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static int scsi_bus_suspend(struct device * dev, pm_message_t state)
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{
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struct device_driver *drv;
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struct scsi_device *sdev;
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int err;
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if (dev->type != &scsi_dev_type)
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return 0;
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drv = dev->driver;
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sdev = to_scsi_device(dev);
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err = scsi_device_quiesce(sdev);
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if (err)
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return err;
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if (drv && drv->suspend) {
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err = drv->suspend(dev, state);
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if (err)
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return err;
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}
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return 0;
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}
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static int scsi_bus_resume(struct device * dev)
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{
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struct device_driver *drv;
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struct scsi_device *sdev;
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int err = 0;
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if (dev->type != &scsi_dev_type)
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return 0;
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drv = dev->driver;
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sdev = to_scsi_device(dev);
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if (drv && drv->resume)
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err = drv->resume(dev);
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scsi_device_resume(sdev);
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return err;
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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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.suspend = scsi_bus_suspend,
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.resume = scsi_bus_resume,
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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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/*
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* 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 \
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sdev_show_##field (struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct scsi_device *sdev; \
|
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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_rd_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); \
|
|
snscanf (buf, 20, format_string, &sdev->field); \
|
|
return count; \
|
|
} \
|
|
static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
|
|
|
|
/* Currently we don't export bit fields, but we might in future,
|
|
* so leave this code in */
|
|
#if 0
|
|
/*
|
|
* sdev_rd_attr: create a function and attribute variable for a
|
|
* read/write bit field.
|
|
*/
|
|
#define sdev_rw_attr_bit(field) \
|
|
sdev_show_function(field, "%d\n") \
|
|
\
|
|
static ssize_t \
|
|
sdev_store_##field (struct device *dev, struct device_attribute *attr, \
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
int ret; \
|
|
struct scsi_device *sdev; \
|
|
ret = scsi_sdev_check_buf_bit(buf); \
|
|
if (ret >= 0) { \
|
|
sdev = to_scsi_device(dev); \
|
|
sdev->field = ret; \
|
|
ret = count; \
|
|
} \
|
|
return ret; \
|
|
} \
|
|
static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field);
|
|
|
|
/*
|
|
* scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1",
|
|
* else return -EINVAL.
|
|
*/
|
|
static int scsi_sdev_check_buf_bit(const char *buf)
|
|
{
|
|
if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) {
|
|
if (buf[0] == '1')
|
|
return 1;
|
|
else if (buf[0] == '0')
|
|
return 0;
|
|
else
|
|
return -EINVAL;
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
#endif
|
|
/*
|
|
* Create the actual show/store functions and data structures.
|
|
*/
|
|
sdev_rd_attr (device_blocked, "%d\n");
|
|
sdev_rd_attr (queue_depth, "%d\n");
|
|
sdev_rd_attr (type, "%d\n");
|
|
sdev_rd_attr (scsi_level, "%d\n");
|
|
sdev_rd_attr (vendor, "%.8s\n");
|
|
sdev_rd_attr (model, "%.16s\n");
|
|
sdev_rd_attr (rev, "%.4s\n");
|
|
|
|
/*
|
|
* TODO: can we make these symlinks to the block layer ones?
|
|
*/
|
|
static ssize_t
|
|
sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct scsi_device *sdev;
|
|
sdev = to_scsi_device(dev);
|
|
return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ);
|
|
}
|
|
|
|
static ssize_t
|
|
sdev_store_timeout (struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_device *sdev;
|
|
int timeout;
|
|
sdev = to_scsi_device(dev);
|
|
sscanf (buf, "%d\n", &timeout);
|
|
blk_queue_rq_timeout(sdev->request_queue, timeout * HZ);
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout);
|
|
|
|
static ssize_t
|
|
store_rescan_field (struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
scsi_rescan_device(dev);
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field);
|
|
|
|
static void sdev_store_delete_callback(struct device *dev)
|
|
{
|
|
scsi_remove_device(to_scsi_device(dev));
|
|
}
|
|
|
|
static ssize_t
|
|
sdev_store_delete(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int rc;
|
|
|
|
/* An attribute cannot be unregistered by one of its own methods,
|
|
* so we have to use this roundabout approach.
|
|
*/
|
|
rc = device_schedule_callback(dev, sdev_store_delete_callback);
|
|
if (rc)
|
|
count = rc;
|
|
return count;
|
|
};
|
|
static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete);
|
|
|
|
static ssize_t
|
|
store_state_field(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int i;
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
enum scsi_device_state state = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sdev_states); i++) {
|
|
const int len = strlen(sdev_states[i].name);
|
|
if (strncmp(sdev_states[i].name, buf, len) == 0 &&
|
|
buf[len] == '\n') {
|
|
state = sdev_states[i].value;
|
|
break;
|
|
}
|
|
}
|
|
if (!state)
|
|
return -EINVAL;
|
|
|
|
if (scsi_device_set_state(sdev, state))
|
|
return -EINVAL;
|
|
return count;
|
|
}
|
|
|
|
static ssize_t
|
|
show_state_field(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
const char *name = scsi_device_state_name(sdev->sdev_state);
|
|
|
|
if (!name)
|
|
return -EINVAL;
|
|
|
|
return snprintf(buf, 20, "%s\n", name);
|
|
}
|
|
|
|
static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field);
|
|
|
|
static ssize_t
|
|
show_queue_type_field(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
const char *name = "none";
|
|
|
|
if (sdev->ordered_tags)
|
|
name = "ordered";
|
|
else if (sdev->simple_tags)
|
|
name = "simple";
|
|
|
|
return snprintf(buf, 20, "%s\n", name);
|
|
}
|
|
|
|
static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL);
|
|
|
|
static ssize_t
|
|
show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8);
|
|
}
|
|
|
|
static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL);
|
|
|
|
#define show_sdev_iostat(field) \
|
|
static ssize_t \
|
|
show_iostat_##field(struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
unsigned long long count = atomic_read(&sdev->field); \
|
|
return snprintf(buf, 20, "0x%llx\n", count); \
|
|
} \
|
|
static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL)
|
|
|
|
show_sdev_iostat(iorequest_cnt);
|
|
show_sdev_iostat(iodone_cnt);
|
|
show_sdev_iostat(ioerr_cnt);
|
|
|
|
static ssize_t
|
|
sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct scsi_device *sdev;
|
|
sdev = to_scsi_device(dev);
|
|
return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type);
|
|
}
|
|
static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL);
|
|
|
|
#define DECLARE_EVT_SHOW(name, Cap_name) \
|
|
static ssize_t \
|
|
sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\
|
|
return snprintf(buf, 20, "%d\n", val); \
|
|
}
|
|
|
|
#define DECLARE_EVT_STORE(name, Cap_name) \
|
|
static ssize_t \
|
|
sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
struct scsi_device *sdev = to_scsi_device(dev); \
|
|
int val = simple_strtoul(buf, NULL, 0); \
|
|
if (val == 0) \
|
|
clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
|
|
else if (val == 1) \
|
|
set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \
|
|
else \
|
|
return -EINVAL; \
|
|
return count; \
|
|
}
|
|
|
|
#define DECLARE_EVT(name, Cap_name) \
|
|
DECLARE_EVT_SHOW(name, Cap_name) \
|
|
DECLARE_EVT_STORE(name, Cap_name) \
|
|
static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \
|
|
sdev_store_evt_##name);
|
|
#define REF_EVT(name) &dev_attr_evt_##name.attr
|
|
|
|
DECLARE_EVT(media_change, MEDIA_CHANGE)
|
|
|
|
/* Default template for device attributes. May NOT be modified */
|
|
static struct attribute *scsi_sdev_attrs[] = {
|
|
&dev_attr_device_blocked.attr,
|
|
&dev_attr_type.attr,
|
|
&dev_attr_scsi_level.attr,
|
|
&dev_attr_vendor.attr,
|
|
&dev_attr_model.attr,
|
|
&dev_attr_rev.attr,
|
|
&dev_attr_rescan.attr,
|
|
&dev_attr_delete.attr,
|
|
&dev_attr_state.attr,
|
|
&dev_attr_timeout.attr,
|
|
&dev_attr_iocounterbits.attr,
|
|
&dev_attr_iorequest_cnt.attr,
|
|
&dev_attr_iodone_cnt.attr,
|
|
&dev_attr_ioerr_cnt.attr,
|
|
&dev_attr_modalias.attr,
|
|
REF_EVT(media_change),
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group scsi_sdev_attr_group = {
|
|
.attrs = scsi_sdev_attrs,
|
|
};
|
|
|
|
static const struct attribute_group *scsi_sdev_attr_groups[] = {
|
|
&scsi_sdev_attr_group,
|
|
NULL
|
|
};
|
|
|
|
static ssize_t
|
|
sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
int depth, retval;
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
struct scsi_host_template *sht = sdev->host->hostt;
|
|
|
|
if (!sht->change_queue_depth)
|
|
return -EINVAL;
|
|
|
|
depth = simple_strtoul(buf, NULL, 0);
|
|
|
|
if (depth < 1)
|
|
return -EINVAL;
|
|
|
|
retval = sht->change_queue_depth(sdev, depth,
|
|
SCSI_QDEPTH_DEFAULT);
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
sdev->max_queue_depth = sdev->queue_depth;
|
|
|
|
return count;
|
|
}
|
|
|
|
static struct device_attribute sdev_attr_queue_depth_rw =
|
|
__ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
|
|
sdev_store_queue_depth_rw);
|
|
|
|
static ssize_t
|
|
sdev_show_queue_ramp_up_period(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct scsi_device *sdev;
|
|
sdev = to_scsi_device(dev);
|
|
return snprintf(buf, 20, "%u\n",
|
|
jiffies_to_msecs(sdev->queue_ramp_up_period));
|
|
}
|
|
|
|
static ssize_t
|
|
sdev_store_queue_ramp_up_period(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
unsigned long period;
|
|
|
|
if (strict_strtoul(buf, 10, &period))
|
|
return -EINVAL;
|
|
|
|
sdev->queue_ramp_up_period = msecs_to_jiffies(period);
|
|
return period;
|
|
}
|
|
|
|
static struct device_attribute sdev_attr_queue_ramp_up_period =
|
|
__ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
|
|
sdev_show_queue_ramp_up_period,
|
|
sdev_store_queue_ramp_up_period);
|
|
|
|
static ssize_t
|
|
sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct scsi_device *sdev = to_scsi_device(dev);
|
|
struct scsi_host_template *sht = sdev->host->hostt;
|
|
int tag_type = 0, retval;
|
|
int prev_tag_type = scsi_get_tag_type(sdev);
|
|
|
|
if (!sdev->tagged_supported || !sht->change_queue_type)
|
|
return -EINVAL;
|
|
|
|
if (strncmp(buf, "ordered", 7) == 0)
|
|
tag_type = MSG_ORDERED_TAG;
|
|
else if (strncmp(buf, "simple", 6) == 0)
|
|
tag_type = MSG_SIMPLE_TAG;
|
|
else if (strncmp(buf, "none", 4) != 0)
|
|
return -EINVAL;
|
|
|
|
if (tag_type == prev_tag_type)
|
|
return count;
|
|
|
|
retval = sht->change_queue_type(sdev, tag_type);
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
return count;
|
|
}
|
|
|
|
static int scsi_target_add(struct scsi_target *starget)
|
|
{
|
|
int error;
|
|
|
|
if (starget->state != STARGET_CREATED)
|
|
return 0;
|
|
|
|
device_enable_async_suspend(&starget->dev);
|
|
|
|
error = device_add(&starget->dev);
|
|
if (error) {
|
|
dev_err(&starget->dev, "target device_add failed, error %d\n", error);
|
|
get_device(&starget->dev);
|
|
scsi_target_reap(starget);
|
|
put_device(&starget->dev);
|
|
return error;
|
|
}
|
|
transport_add_device(&starget->dev);
|
|
starget->state = STARGET_RUNNING;
|
|
|
|
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);
|
|
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 ||
|
|
sdev->sdev_state == SDEV_DEL)
|
|
continue;
|
|
spin_unlock_irqrestore(shost->host_lock, flags);
|
|
scsi_remove_device(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)
|
|
{
|
|
struct device *rdev;
|
|
|
|
if (scsi_is_target_device(dev)) {
|
|
__scsi_remove_target(to_scsi_target(dev));
|
|
return;
|
|
}
|
|
|
|
rdev = get_device(dev);
|
|
device_for_each_child(dev, NULL, __remove_child);
|
|
put_device(rdev);
|
|
}
|
|
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, }, }, }, };
|