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authorLuis Henriques <lhenriques@suse.com>2018-01-12 17:19:28 +0000
committerIlya Dryomov <idryomov@gmail.com>2018-04-02 11:17:53 +0200
commite3161f17d92699ce6ca3b7988131b10ad4035cf9 (patch)
tree64517e87740efded4fd4a962343ba81bef5d6be9 /fs/ceph
parent0eb6bbe4d9cf02f639d661edf7c02defc3453a69 (diff)
downloadlinux-e3161f17d92699ce6ca3b7988131b10ad4035cf9.tar.bz2
ceph: quota: cache inode pointer in ceph_snap_realm
Keep a pointer to the inode in struct ceph_snap_realm. This allows to optimize functions that walk the realms hierarchy (e.g. in quotas). Signed-off-by: Luis Henriques <lhenriques@suse.com> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/caps.c4
-rw-r--r--fs/ceph/inode.c3
-rw-r--r--fs/ceph/quota.c24
-rw-r--r--fs/ceph/snap.c2
-rw-r--r--fs/ceph/super.h1
5 files changed, 19 insertions, 15 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 25141b6683e9..23dbfae16156 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -703,9 +703,11 @@ void ceph_add_cap(struct inode *inode,
}
spin_lock(&realm->inodes_with_caps_lock);
- ci->i_snap_realm = realm;
list_add(&ci->i_snap_realm_item,
&realm->inodes_with_caps);
+ ci->i_snap_realm = realm;
+ if (realm->ino == ci->i_vino.ino)
+ realm->inode = inode;
spin_unlock(&realm->inodes_with_caps_lock);
if (oldrealm)
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 50ccae151ea0..8ea11b1a2e23 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -551,6 +551,9 @@ void ceph_destroy_inode(struct inode *inode)
dout(" dropping residual ref to snap realm %p\n", realm);
spin_lock(&realm->inodes_with_caps_lock);
list_del_init(&ci->i_snap_realm_item);
+ ci->i_snap_realm = NULL;
+ if (realm->ino == ci->i_vino.ino)
+ realm->inode = NULL;
spin_unlock(&realm->inodes_with_caps_lock);
ceph_put_snap_realm(mdsc, realm);
}
diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c
index 121819baeb58..c561a85ea8b1 100644
--- a/fs/ceph/quota.c
+++ b/fs/ceph/quota.c
@@ -83,7 +83,6 @@ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc,
{
struct ceph_inode_info *ci = NULL;
struct ceph_snap_realm *realm, *next;
- struct ceph_vino vino;
struct inode *in;
bool has_quota;
@@ -97,13 +96,12 @@ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc,
pr_err_ratelimited("get_quota_realm: ino (%llx.%llx) "
"null i_snap_realm\n", ceph_vinop(inode));
while (realm) {
- vino.ino = realm->ino;
- vino.snap = CEPH_NOSNAP;
- in = ceph_find_inode(inode->i_sb, vino);
- if (!in) {
- pr_warn("Failed to find inode for %llu\n", vino.ino);
+ spin_lock(&realm->inodes_with_caps_lock);
+ in = realm->inode ? igrab(realm->inode) : NULL;
+ spin_unlock(&realm->inodes_with_caps_lock);
+ if (!in)
break;
- }
+
ci = ceph_inode(in);
has_quota = ceph_has_quota(ci);
iput(in);
@@ -161,7 +159,6 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op,
struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
struct ceph_inode_info *ci;
struct ceph_snap_realm *realm, *next;
- struct ceph_vino vino;
struct inode *in;
u64 max, rvalue;
bool exceeded = false;
@@ -177,13 +174,12 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op,
pr_err_ratelimited("check_quota_exceeded: ino (%llx.%llx) "
"null i_snap_realm\n", ceph_vinop(inode));
while (realm) {
- vino.ino = realm->ino;
- vino.snap = CEPH_NOSNAP;
- in = ceph_find_inode(inode->i_sb, vino);
- if (!in) {
- pr_warn("Failed to find inode for %llu\n", vino.ino);
+ spin_lock(&realm->inodes_with_caps_lock);
+ in = realm->inode ? igrab(realm->inode) : NULL;
+ spin_unlock(&realm->inodes_with_caps_lock);
+ if (!in)
break;
- }
+
ci = ceph_inode(in);
spin_lock(&ci->i_ceph_lock);
if (op == QUOTA_CHECK_MAX_FILES_OP) {
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c
index 07cf95e6413d..041c27ea8de1 100644
--- a/fs/ceph/snap.c
+++ b/fs/ceph/snap.c
@@ -931,6 +931,8 @@ void ceph_handle_snap(struct ceph_mds_client *mdsc,
list_add(&ci->i_snap_realm_item,
&realm->inodes_with_caps);
ci->i_snap_realm = realm;
+ if (realm->ino == ci->i_vino.ino)
+ realm->inode = inode;
spin_unlock(&realm->inodes_with_caps_lock);
spin_unlock(&ci->i_ceph_lock);
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index e4ff485d24c7..8217abf46182 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -755,6 +755,7 @@ struct ceph_readdir_cache_control {
*/
struct ceph_snap_realm {
u64 ino;
+ struct inode *inode;
atomic_t nref;
struct rb_node node;