| Message ID | 20231029204635.GV800259@ZenIV (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [RFC] get rid of passing callbacks to ceph __dentry_leases_walk() | expand |
On Sun, 2023-10-29 at 20:46 +0000, Al Viro wrote: > __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; > > Nice cleanup. Reviewed-by: Jeff Layton <jlayton@kernel.org>
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;
__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> ---