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Vdev Properties Feature

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Add properties, similar to pool properties, to each vdev.
This makes use of the existing per-vdev ZAP that was added as
part of device evacuation/removal.

A large number of read-only properties are exposed,
many of the members of struct vdev_t, that provide useful
statistics.

Adds support for read-only "removing" vdev property.
Adds the "allocating" property that defaults to "on" and
can be set to "off" to prevent future allocations from that
top-level vdev.

Supports user-defined vdev properties.
Includes support for properties.vdev in SYSFS.

Co-authored-by: Allan Jude <allan@klarasystems.com>
Co-authored-by: Mark Maybee <mark.maybee@delphix.com>
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Mark Maybee <mark.maybee@delphix.com>
Signed-off-by: Allan Jude <allan@klarasystems.com>
Closes #11711
This commit is contained in:
Allan Jude
2021-11-30 09:46:25 -05:00
committed by GitHub
parent 5f64bf7fde
commit 2a673e76a9
33 changed files with 2746 additions and 243 deletions
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module/os/linux/zfs/zfs_sysfs.c
+35 -1
View File
@@ -90,6 +90,7 @@ struct zfs_mod_kobj {
static zfs_mod_kobj_t kernel_features_kobj;
static zfs_mod_kobj_t pool_features_kobj;
static zfs_mod_kobj_t dataset_props_kobj;
static zfs_mod_kobj_t vdev_props_kobj;
static zfs_mod_kobj_t pool_props_kobj;
/*
@@ -333,6 +334,20 @@ dataset_property_show(struct kobject *kobj, struct attribute *attr, char *buf)
return (len);
}
static ssize_t
vdev_property_show(struct kobject *kobj, struct attribute *attr, char *buf)
{
vdev_prop_t prop = vdev_name_to_prop(kobject_name(kobj));
zprop_desc_t *prop_tbl = vdev_prop_get_table();
ssize_t len;
ASSERT3U(prop, <, VDEV_NUM_PROPS);
len = zprop_sysfs_show(attr->name, &prop_tbl[prop], buf, PAGE_SIZE);
return (len);
}
static ssize_t
pool_property_show(struct kobject *kobj, struct attribute *attr, char *buf)
{
@@ -577,6 +592,14 @@ zfs_sysfs_properties_init(zfs_mod_kobj_t *zfs_kobj, struct kobject *parent,
context.p2k_show_func = pool_property_show;
err = zfs_kobj_init(zfs_kobj, 0, ZPOOL_NUM_PROPS,
pool_property_show);
} else if (type == ZFS_TYPE_VDEV) {
name = ZFS_SYSFS_VDEV_PROPERTIES;
context.p2k_table = vdev_prop_get_table();
context.p2k_attr_count = ZPOOL_PROP_ATTR_COUNT;
context.p2k_parent = zfs_kobj;
context.p2k_show_func = vdev_property_show;
err = zfs_kobj_init(zfs_kobj, 0, VDEV_NUM_PROPS,
vdev_property_show);
} else {
name = ZFS_SYSFS_DATASET_PROPERTIES;
context.p2k_table = zfs_prop_get_table();
@@ -639,12 +662,22 @@ zfs_sysfs_init(void)
return;
}
err = zfs_sysfs_properties_init(&vdev_props_kobj, parent,
ZFS_TYPE_VDEV);
if (err) {
zfs_kobj_fini(&kernel_features_kobj);
zfs_kobj_fini(&pool_features_kobj);
zfs_kobj_fini(&pool_props_kobj);
return;
}
err = zfs_sysfs_properties_init(&dataset_props_kobj, parent,
ZFS_TYPE_FILESYSTEM);
if (err) {
zfs_kobj_fini(&kernel_features_kobj);
zfs_kobj_fini(&pool_features_kobj);
zfs_kobj_fini(&pool_props_kobj);
zfs_kobj_fini(&vdev_props_kobj);
return;
}
}
@@ -657,6 +690,7 @@ zfs_sysfs_fini(void)
*/
zfs_kobj_fini(&kernel_features_kobj);
zfs_kobj_fini(&pool_features_kobj);
zfs_kobj_fini(&dataset_props_kobj);
zfs_kobj_fini(&pool_props_kobj);
zfs_kobj_fini(&vdev_props_kobj);
zfs_kobj_fini(&dataset_props_kobj);
}