mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-11-07 04:09:21 +00:00
ceph: use rbtree for snap_realms
Switch from radix tree to rbtree for snap realms. This is much more appropriate given that realm keys are few and far between. Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
parent
44ca18f268
commit
a105f00cf1
4 changed files with 47 additions and 23 deletions
|
@ -2097,9 +2097,8 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc, int mds)
|
|||
{
|
||||
struct ceph_mds_session *session = NULL;
|
||||
struct ceph_msg *reply;
|
||||
struct rb_node *p;
|
||||
int err;
|
||||
int got;
|
||||
u64 next_snap_ino = 0;
|
||||
struct ceph_pagelist *pagelist;
|
||||
|
||||
pr_info("reconnect to recovering mds%d\n", mds);
|
||||
|
@ -2155,14 +2154,10 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc, int mds)
|
|||
* parent for all of our realms. If the mds has any newer info,
|
||||
* it will tell us.
|
||||
*/
|
||||
next_snap_ino = 0;
|
||||
while (1) {
|
||||
struct ceph_snap_realm *realm;
|
||||
for (p = rb_first(&mdsc->snap_realms); p; p = rb_next(p)) {
|
||||
struct ceph_snap_realm *realm =
|
||||
rb_entry(p, struct ceph_snap_realm, node);
|
||||
struct ceph_mds_snaprealm_reconnect sr_rec;
|
||||
got = radix_tree_gang_lookup(&mdsc->snap_realms,
|
||||
(void **)&realm, next_snap_ino, 1);
|
||||
if (!got)
|
||||
break;
|
||||
|
||||
dout(" adding snap realm %llx seq %lld parent %llx\n",
|
||||
realm->ino, realm->seq, realm->parent_ino);
|
||||
|
@ -2172,7 +2167,6 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc, int mds)
|
|||
err = ceph_pagelist_append(pagelist, &sr_rec, sizeof(sr_rec));
|
||||
if (err)
|
||||
goto fail;
|
||||
next_snap_ino = realm->ino + 1;
|
||||
}
|
||||
|
||||
send:
|
||||
|
@ -2603,7 +2597,7 @@ int ceph_mdsc_init(struct ceph_mds_client *mdsc, struct ceph_client *client)
|
|||
mdsc->max_sessions = 0;
|
||||
mdsc->stopping = 0;
|
||||
init_rwsem(&mdsc->snap_rwsem);
|
||||
INIT_RADIX_TREE(&mdsc->snap_realms, GFP_NOFS);
|
||||
mdsc->snap_realms = RB_ROOT;
|
||||
INIT_LIST_HEAD(&mdsc->snap_empty);
|
||||
spin_lock_init(&mdsc->snap_empty_lock);
|
||||
mdsc->last_tid = 0;
|
||||
|
|
|
@ -5,7 +5,6 @@
|
|||
#include <linux/kref.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/radix-tree.h>
|
||||
#include <linux/rbtree.h>
|
||||
#include <linux/spinlock.h>
|
||||
|
||||
|
@ -246,7 +245,7 @@ struct ceph_mds_client {
|
|||
* should be destroyed.
|
||||
*/
|
||||
struct rw_semaphore snap_rwsem;
|
||||
struct radix_tree_root snap_realms;
|
||||
struct rb_root snap_realms;
|
||||
struct list_head snap_empty;
|
||||
spinlock_t snap_empty_lock; /* protect snap_empty */
|
||||
|
||||
|
|
|
@ -1,6 +1,5 @@
|
|||
#include "ceph_debug.h"
|
||||
|
||||
#include <linux/radix-tree.h>
|
||||
#include <linux/sort.h>
|
||||
|
||||
#include "super.h"
|
||||
|
@ -77,6 +76,28 @@ void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
|
|||
atomic_inc(&realm->nref);
|
||||
}
|
||||
|
||||
static void __insert_snap_realm(struct rb_root *root,
|
||||
struct ceph_snap_realm *new)
|
||||
{
|
||||
struct rb_node **p = &root->rb_node;
|
||||
struct rb_node *parent = NULL;
|
||||
struct ceph_snap_realm *r = NULL;
|
||||
|
||||
while (*p) {
|
||||
parent = *p;
|
||||
r = rb_entry(parent, struct ceph_snap_realm, node);
|
||||
if (new->ino < r->ino)
|
||||
p = &(*p)->rb_left;
|
||||
else if (new->ino > r->ino)
|
||||
p = &(*p)->rb_right;
|
||||
else
|
||||
BUG();
|
||||
}
|
||||
|
||||
rb_link_node(&new->node, parent, p);
|
||||
rb_insert_color(&new->node, root);
|
||||
}
|
||||
|
||||
/*
|
||||
* create and get the realm rooted at @ino and bump its ref count.
|
||||
*
|
||||
|
@ -92,8 +113,6 @@ static struct ceph_snap_realm *ceph_create_snap_realm(
|
|||
if (!realm)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
radix_tree_insert(&mdsc->snap_realms, ino, realm);
|
||||
|
||||
atomic_set(&realm->nref, 0); /* tree does not take a ref */
|
||||
realm->ino = ino;
|
||||
INIT_LIST_HEAD(&realm->children);
|
||||
|
@ -101,24 +120,34 @@ static struct ceph_snap_realm *ceph_create_snap_realm(
|
|||
INIT_LIST_HEAD(&realm->empty_item);
|
||||
INIT_LIST_HEAD(&realm->inodes_with_caps);
|
||||
spin_lock_init(&realm->inodes_with_caps_lock);
|
||||
__insert_snap_realm(&mdsc->snap_realms, realm);
|
||||
dout("create_snap_realm %llx %p\n", realm->ino, realm);
|
||||
return realm;
|
||||
}
|
||||
|
||||
/*
|
||||
* find and get (if found) the realm rooted at @ino and bump its ref count.
|
||||
* lookup the realm rooted at @ino.
|
||||
*
|
||||
* caller must hold snap_rwsem for write.
|
||||
*/
|
||||
struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
|
||||
u64 ino)
|
||||
{
|
||||
struct ceph_snap_realm *realm;
|
||||
struct rb_node *n = mdsc->snap_realms.rb_node;
|
||||
struct ceph_snap_realm *r;
|
||||
|
||||
realm = radix_tree_lookup(&mdsc->snap_realms, ino);
|
||||
if (realm)
|
||||
dout("lookup_snap_realm %llx %p\n", realm->ino, realm);
|
||||
return realm;
|
||||
while (n) {
|
||||
r = rb_entry(n, struct ceph_snap_realm, node);
|
||||
if (ino < r->ino)
|
||||
n = n->rb_left;
|
||||
else if (ino > r->ino)
|
||||
n = n->rb_right;
|
||||
else {
|
||||
dout("lookup_snap_realm %llx %p\n", r->ino, r);
|
||||
return r;
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void __put_snap_realm(struct ceph_mds_client *mdsc,
|
||||
|
@ -132,7 +161,7 @@ static void __destroy_snap_realm(struct ceph_mds_client *mdsc,
|
|||
{
|
||||
dout("__destroy_snap_realm %p %llx\n", realm, realm->ino);
|
||||
|
||||
radix_tree_delete(&mdsc->snap_realms, realm->ino);
|
||||
rb_erase(&realm->node, &mdsc->snap_realms);
|
||||
|
||||
if (realm->parent) {
|
||||
list_del_init(&realm->child_item);
|
||||
|
|
|
@ -656,6 +656,8 @@ static inline void ceph_put_snap_context(struct ceph_snap_context *sc)
|
|||
struct ceph_snap_realm {
|
||||
u64 ino;
|
||||
atomic_t nref;
|
||||
struct rb_node node;
|
||||
|
||||
u64 created, seq;
|
||||
u64 parent_ino;
|
||||
u64 parent_since; /* snapid when our current parent became so */
|
||||
|
|
Loading…
Reference in a new issue