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[PATCH] elevator_t lifetime rules and sysfs fixes

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This commit is contained in:
Al Viro 2006-03-18 18:35:43 -05:00
commit 3d1ab40f4c
5 changed files with 160 additions and 202 deletions
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64
block/deadline-iosched.c
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@ -694,11 +694,6 @@ deadline_set_request(request_queue_t *q, struct request *rq, struct bio *bio,
/*
* sysfs parts below
*/
struct deadline_fs_entry {
struct attribute attr;
ssize_t (*show)(struct deadline_data *, char *);
ssize_t (*store)(struct deadline_data *, const char *, size_t);
};
static ssize_t
deadline_var_show(int var, char *page)
@ -716,9 +711,10 @@ deadline_var_store(int *var, const char *page, size_t count)
}
#define SHOW_FUNCTION(__FUNC, __VAR, __CONV) \
static ssize_t __FUNC(struct deadline_data *dd, char *page) \
static ssize_t __FUNC(elevator_t *e, char *page) \
{ \
int __data = __VAR; \
struct deadline_data *dd = e->elevator_data; \
int __data = __VAR; \
if (__CONV) \
__data = jiffies_to_msecs(__data); \
return deadline_var_show(__data, (page)); \
@ -731,8 +727,9 @@ SHOW_FUNCTION(deadline_fifobatch_show, dd->fifo_batch, 0);
#undef SHOW_FUNCTION
#define STORE_FUNCTION(__FUNC, __PTR, MIN, MAX, __CONV) \
static ssize_t __FUNC(struct deadline_data *dd, const char *page, size_t count) \
static ssize_t __FUNC(elevator_t *e, const char *page, size_t count) \
{ \
struct deadline_data *dd = e->elevator_data; \
int __data; \
int ret = deadline_var_store(&__data, (page), count); \
if (__data < (MIN)) \
@ -752,33 +749,33 @@ STORE_FUNCTION(deadline_frontmerges_store, &dd->front_merges, 0, 1, 0);
STORE_FUNCTION(deadline_fifobatch_store, &dd->fifo_batch, 0, INT_MAX, 0);
#undef STORE_FUNCTION
static struct deadline_fs_entry deadline_readexpire_entry = {
static struct elv_fs_entry deadline_readexpire_entry = {
.attr = {.name = "read_expire", .mode = S_IRUGO | S_IWUSR },
.show = deadline_readexpire_show,
.store = deadline_readexpire_store,
};
static struct deadline_fs_entry deadline_writeexpire_entry = {
static struct elv_fs_entry deadline_writeexpire_entry = {
.attr = {.name = "write_expire", .mode = S_IRUGO | S_IWUSR },
.show = deadline_writeexpire_show,
.store = deadline_writeexpire_store,
};
static struct deadline_fs_entry deadline_writesstarved_entry = {
static struct elv_fs_entry deadline_writesstarved_entry = {
.attr = {.name = "writes_starved", .mode = S_IRUGO | S_IWUSR },
.show = deadline_writesstarved_show,
.store = deadline_writesstarved_store,
};
static struct deadline_fs_entry deadline_frontmerges_entry = {
static struct elv_fs_entry deadline_frontmerges_entry = {
.attr = {.name = "front_merges", .mode = S_IRUGO | S_IWUSR },
.show = deadline_frontmerges_show,
.store = deadline_frontmerges_store,
};
static struct deadline_fs_entry deadline_fifobatch_entry = {
static struct elv_fs_entry deadline_fifobatch_entry = {
.attr = {.name = "fifo_batch", .mode = S_IRUGO | S_IWUSR },
.show = deadline_fifobatch_show,
.store = deadline_fifobatch_store,
};
static struct attribute *default_attrs[] = {
static struct attribute *deadline_attrs[] = {
&deadline_readexpire_entry.attr,
&deadline_writeexpire_entry.attr,
&deadline_writesstarved_entry.attr,
@ -787,43 +784,6 @@ static struct attribute *default_attrs[] = {
NULL,
};
#define to_deadline(atr) container_of((atr), struct deadline_fs_entry, attr)
static ssize_t
deadline_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
{
elevator_t *e = container_of(kobj, elevator_t, kobj);
struct deadline_fs_entry *entry = to_deadline(attr);
if (!entry->show)
return -EIO;
return entry->show(e->elevator_data, page);
}
static ssize_t
deadline_attr_store(struct kobject *kobj, struct attribute *attr,
const char *page, size_t length)
{
elevator_t *e = container_of(kobj, elevator_t, kobj);
struct deadline_fs_entry *entry = to_deadline(attr);
if (!entry->store)
return -EIO;
return entry->store(e->elevator_data, page, length);
}
static struct sysfs_ops deadline_sysfs_ops = {
.show = deadline_attr_show,
.store = deadline_attr_store,
};
static struct kobj_type deadline_ktype = {
.sysfs_ops = &deadline_sysfs_ops,
.default_attrs = default_attrs,
};
static struct elevator_type iosched_deadline = {
.ops = {
.elevator_merge_fn = deadline_merge,
@ -840,7 +800,7 @@ static struct elevator_type iosched_deadline = {
.elevator_exit_fn = deadline_exit_queue,
},
.elevator_ktype = &deadline_ktype,
.elevator_attrs = deadline_attrs,
.elevator_name = "deadline",
.elevator_owner = THIS_MODULE,
};