From: Al Viro <viro@zeniv.linux.org.uk>
To: ceph-devel@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org
Subject: [RFC][PATCH] get rid of passing callbacks to ceph __dentry_leases_walk()
Date: Sun, 29 Oct 2023 20:46:35 +0000 [thread overview]
Message-ID: <20231029204635.GV800259@ZenIV> (raw)
__dentry_leases_walk() is gets a callback and calls it for
a bunch of denties; there are exactly two callers and
we already have a flag telling them apart - lwc->dir_lease.
Seeing that indirect calls are costly these days, let's
get rid of the callback and just call the right function
directly. Has a side benefit of saner signatures...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 854cbdd66661..30b06d171a40 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1550,10 +1550,12 @@ struct ceph_lease_walk_control {
unsigned long dir_lease_ttl;
};
+static int __dir_lease_check(const struct dentry *, struct ceph_lease_walk_control *);
+static int __dentry_lease_check(const struct dentry *);
+
static unsigned long
__dentry_leases_walk(struct ceph_mds_client *mdsc,
- struct ceph_lease_walk_control *lwc,
- int (*check)(struct dentry*, void*))
+ struct ceph_lease_walk_control *lwc)
{
struct ceph_dentry_info *di, *tmp;
struct dentry *dentry, *last = NULL;
@@ -1581,7 +1583,10 @@ __dentry_leases_walk(struct ceph_mds_client *mdsc,
goto next;
}
- ret = check(dentry, lwc);
+ if (lwc->dir_lease)
+ ret = __dir_lease_check(dentry, lwc);
+ else
+ ret = __dentry_lease_check(dentry);
if (ret & TOUCH) {
/* move it into tail of dir lease list */
__dentry_dir_lease_touch(mdsc, di);
@@ -1638,7 +1643,7 @@ __dentry_leases_walk(struct ceph_mds_client *mdsc,
return freed;
}
-static int __dentry_lease_check(struct dentry *dentry, void *arg)
+static int __dentry_lease_check(const struct dentry *dentry)
{
struct ceph_dentry_info *di = ceph_dentry(dentry);
int ret;
@@ -1653,9 +1658,9 @@ static int __dentry_lease_check(struct dentry *dentry, void *arg)
return DELETE;
}
-static int __dir_lease_check(struct dentry *dentry, void *arg)
+static int __dir_lease_check(const struct dentry *dentry,
+ struct ceph_lease_walk_control *lwc)
{
- struct ceph_lease_walk_control *lwc = arg;
struct ceph_dentry_info *di = ceph_dentry(dentry);
int ret = __dir_lease_try_check(dentry);
@@ -1694,7 +1699,7 @@ int ceph_trim_dentries(struct ceph_mds_client *mdsc)
lwc.dir_lease = false;
lwc.nr_to_scan = CEPH_CAPS_PER_RELEASE * 2;
- freed = __dentry_leases_walk(mdsc, &lwc, __dentry_lease_check);
+ freed = __dentry_leases_walk(mdsc, &lwc);
if (!lwc.nr_to_scan) /* more invalid leases */
return -EAGAIN;
@@ -1704,7 +1709,7 @@ int ceph_trim_dentries(struct ceph_mds_client *mdsc)
lwc.dir_lease = true;
lwc.expire_dir_lease = freed < count;
lwc.dir_lease_ttl = mdsc->fsc->mount_options->caps_wanted_delay_max * HZ;
- freed +=__dentry_leases_walk(mdsc, &lwc, __dir_lease_check);
+ freed +=__dentry_leases_walk(mdsc, &lwc);
if (!lwc.nr_to_scan) /* more to check */
return -EAGAIN;
next reply other threads:[~2023-10-29 20:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-29 20:46 Al Viro [this message]
2023-10-30 12:18 ` [RFC][PATCH] get rid of passing callbacks to ceph __dentry_leases_walk() Jeff Layton
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