diff options
author | NeilBrown <neilb@suse.de> | 2005-11-08 21:39:23 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-09 07:56:36 -0800 |
commit | eae1701fbd264cfc7efbaf7cd4cd999760070e27 (patch) | |
tree | 6605cca37d4c605217b7accffe7f94f81d37f0dd /drivers/md | |
parent | 4e5314b56a7ea11c7a5f2b8418992b2f49648a25 (diff) | |
download | op-kernel-dev-eae1701fbd264cfc7efbaf7cd4cd999760070e27.zip op-kernel-dev-eae1701fbd264cfc7efbaf7cd4cd999760070e27.tar.gz |
[PATCH] md: initial sysfs support for md
Start using kobjects in mddevs, and provide a couple of simple attributes
(level and disks). Attributes live in
/sys/block/mdX/md/attr-name
Signed-off-by: Neil Brown <neilb@suse.de>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md')
-rw-r--r-- | drivers/md/md.c | 86 |
1 files changed, 85 insertions, 1 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 9ecf51e..a68ad85 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -181,7 +181,7 @@ static void mddev_put(mddev_t *mddev) if (!mddev->raid_disks && list_empty(&mddev->disks)) { list_del(&mddev->all_mddevs); blk_put_queue(mddev->queue); - kfree(mddev); + kobject_unregister(&mddev->kobj); } spin_unlock(&all_mddevs_lock); } @@ -1551,6 +1551,85 @@ static void analyze_sbs(mddev_t * mddev) } +struct md_sysfs_entry { + struct attribute attr; + ssize_t (*show)(mddev_t *, char *); + ssize_t (*store)(mddev_t *, const char *, size_t); +}; + +static ssize_t +md_show_level(mddev_t *mddev, char *page) +{ + mdk_personality_t *p = mddev->pers; + if (p == NULL) + return 0; + if (mddev->level >= 0) + return sprintf(page, "RAID-%d\n", mddev->level); + else + return sprintf(page, "%s\n", p->name); +} + +static struct md_sysfs_entry md_level = { + .attr = {.name = "level", .mode = S_IRUGO }, + .show = md_show_level, +}; + +static ssize_t +md_show_rdisks(mddev_t *mddev, char *page) +{ + return sprintf(page, "%d\n", mddev->raid_disks); +} + +static struct md_sysfs_entry md_raid_disks = { + .attr = {.name = "raid_disks", .mode = S_IRUGO }, + .show = md_show_rdisks, +}; + +static struct attribute *md_default_attrs[] = { + &md_level.attr, + &md_raid_disks.attr, + NULL, +}; + +static ssize_t +md_attr_show(struct kobject *kobj, struct attribute *attr, char *page) +{ + struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); + mddev_t *mddev = container_of(kobj, struct mddev_s, kobj); + + if (!entry->show) + return -EIO; + return entry->show(mddev, page); +} + +static ssize_t +md_attr_store(struct kobject *kobj, struct attribute *attr, + const char *page, size_t length) +{ + struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr); + mddev_t *mddev = container_of(kobj, struct mddev_s, kobj); + + if (!entry->store) + return -EIO; + return entry->store(mddev, page, length); +} + +static void md_free(struct kobject *ko) +{ + mddev_t *mddev = container_of(ko, mddev_t, kobj); + kfree(mddev); +} + +static struct sysfs_ops md_sysfs_ops = { + .show = md_attr_show, + .store = md_attr_store, +}; +static struct kobj_type md_ktype = { + .release = md_free, + .sysfs_ops = &md_sysfs_ops, + .default_attrs = md_default_attrs, +}; + int mdp_major = 0; static struct kobject *md_probe(dev_t dev, int *part, void *data) @@ -1592,6 +1671,11 @@ static struct kobject *md_probe(dev_t dev, int *part, void *data) add_disk(disk); mddev->gendisk = disk; up(&disks_sem); + mddev->kobj.parent = kobject_get(&disk->kobj); + mddev->kobj.k_name = NULL; + snprintf(mddev->kobj.name, KOBJ_NAME_LEN, "%s", "md"); + mddev->kobj.ktype = &md_ktype; + kobject_register(&mddev->kobj); return NULL; } |