GFS2: Improve statfs and quota usability
GFS2 now has three new mount options, statfs_quantum, quota_quantum and
statfs_percent. statfs_quantum and quota_quantum simply allow you to
set the tunables of the same name. Setting setting statfs_quantum to 0
will also turn on the statfs_slow tunable. statfs_percent accepts an
integer between 0 and 100. Numbers between 1 and 100 will cause GFS2 to
do any early sync when the local number of blocks free changes by at
least statfs_percent from the totoal number of blocks free. Setting
statfs_percent to 0 disables this.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index e7b24d5..3fee2fd 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -70,6 +70,9 @@
Opt_commit,
Opt_err_withdraw,
Opt_err_panic,
+ Opt_statfs_quantum,
+ Opt_statfs_percent,
+ Opt_quota_quantum,
Opt_error,
};
@@ -101,6 +104,9 @@
{Opt_commit, "commit=%d"},
{Opt_err_withdraw, "errors=withdraw"},
{Opt_err_panic, "errors=panic"},
+ {Opt_statfs_quantum, "statfs_quantum=%d"},
+ {Opt_statfs_percent, "statfs_percent=%d"},
+ {Opt_quota_quantum, "quota_quantum=%d"},
{Opt_error, NULL}
};
@@ -214,6 +220,28 @@
return rv ? rv : -EINVAL;
}
break;
+ case Opt_statfs_quantum:
+ rv = match_int(&tmp[0], &args->ar_statfs_quantum);
+ if (rv || args->ar_statfs_quantum < 0) {
+ printk(KERN_WARNING "GFS2: statfs_quantum mount option requires a non-negative numeric argument\n");
+ return rv ? rv : -EINVAL;
+ }
+ break;
+ case Opt_quota_quantum:
+ rv = match_int(&tmp[0], &args->ar_quota_quantum);
+ if (rv || args->ar_quota_quantum <= 0) {
+ printk(KERN_WARNING "GFS2: quota_quantum mount option requires a positive numeric argument\n");
+ return rv ? rv : -EINVAL;
+ }
+ break;
+ case Opt_statfs_percent:
+ rv = match_int(&tmp[0], &args->ar_statfs_percent);
+ if (rv || args->ar_statfs_percent < 0 ||
+ args->ar_statfs_percent > 100) {
+ printk(KERN_WARNING "statfs_percent mount option requires a numeric argument between 0 and 100\n");
+ return rv ? rv : -EINVAL;
+ }
+ break;
case Opt_err_withdraw:
args->ar_errors = GFS2_ERRORS_WITHDRAW;
break;
@@ -442,7 +470,9 @@
{
struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
+ struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
struct buffer_head *l_bh;
+ int percent, sync_percent;
int error;
error = gfs2_meta_inode_buffer(l_ip, &l_bh);
@@ -456,9 +486,17 @@
l_sc->sc_free += free;
l_sc->sc_dinodes += dinodes;
gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode));
+ if (m_sc->sc_free)
+ percent = (100 * l_sc->sc_free) / m_sc->sc_free;
+ else
+ percent = 100;
spin_unlock(&sdp->sd_statfs_spin);
brelse(l_bh);
+ sync_percent = sdp->sd_args.ar_statfs_percent;
+ if (sync_percent && (percent >= sync_percent ||
+ percent <= -sync_percent))
+ gfs2_wake_up_statfs(sdp);
}
void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh,
@@ -522,6 +560,7 @@
goto out_bh2;
update_statfs(sdp, m_bh, l_bh);
+ sdp->sd_statfs_force_sync = 0;
gfs2_trans_end(sdp);
@@ -1062,6 +1101,11 @@
spin_lock(>->gt_spin);
args.ar_commit = gt->gt_log_flush_secs;
+ args.ar_quota_quantum = gt->gt_quota_quantum;
+ if (gt->gt_statfs_slow)
+ args.ar_statfs_quantum = 0;
+ else
+ args.ar_statfs_quantum = gt->gt_statfs_quantum;
spin_unlock(>->gt_spin);
error = gfs2_mount_args(&args, data);
if (error)
@@ -1100,6 +1144,15 @@
sb->s_flags &= ~MS_POSIXACL;
spin_lock(>->gt_spin);
gt->gt_log_flush_secs = args.ar_commit;
+ gt->gt_quota_quantum = args.ar_quota_quantum;
+ if (args.ar_statfs_quantum) {
+ gt->gt_statfs_slow = 0;
+ gt->gt_statfs_quantum = args.ar_statfs_quantum;
+ }
+ else {
+ gt->gt_statfs_slow = 1;
+ gt->gt_statfs_quantum = 30;
+ }
spin_unlock(>->gt_spin);
gfs2_online_uevent(sdp);
@@ -1180,7 +1233,7 @@
{
struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info;
struct gfs2_args *args = &sdp->sd_args;
- int lfsecs;
+ int val;
if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir))
seq_printf(s, ",meta");
@@ -1241,9 +1294,17 @@
}
if (args->ar_discard)
seq_printf(s, ",discard");
- lfsecs = sdp->sd_tune.gt_log_flush_secs;
- if (lfsecs != 60)
- seq_printf(s, ",commit=%d", lfsecs);
+ val = sdp->sd_tune.gt_log_flush_secs;
+ if (val != 60)
+ seq_printf(s, ",commit=%d", val);
+ val = sdp->sd_tune.gt_statfs_quantum;
+ if (val != 30)
+ seq_printf(s, ",statfs_quantum=%d", val);
+ val = sdp->sd_tune.gt_quota_quantum;
+ if (val != 60)
+ seq_printf(s, ",quota_quantum=%d", val);
+ if (args->ar_statfs_percent)
+ seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent);
if (args->ar_errors != GFS2_ERRORS_DEFAULT) {
const char *state;
