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Diffstat (limited to 'fs/gfs2/quota.c')
-rw-r--r--fs/gfs2/quota.c76
1 files changed, 70 insertions, 6 deletions
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 228a46596188..0cfe44f0b6ab 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -46,6 +46,8 @@
#include <linux/bio.h>
#include <linux/gfs2_ondisk.h>
#include <linux/lm_interface.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
#include "gfs2.h"
#include "incore.h"
@@ -94,7 +96,7 @@ static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id,
struct gfs2_quota_data *qd;
int error;
- qd = kzalloc(sizeof(struct gfs2_quota_data), GFP_NOFS);
+ qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
if (!qd)
return -ENOMEM;
@@ -119,7 +121,7 @@ static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id,
return 0;
fail:
- kfree(qd);
+ kmem_cache_free(gfs2_quotad_cachep, qd);
return error;
}
@@ -158,7 +160,7 @@ static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
if (qd || !create) {
if (new_qd) {
gfs2_lvb_unhold(new_qd->qd_gl);
- kfree(new_qd);
+ kmem_cache_free(gfs2_quotad_cachep, new_qd);
}
*qdp = qd;
return 0;
@@ -1195,7 +1197,7 @@ fail:
return error;
}
-void gfs2_quota_scan(struct gfs2_sbd *sdp)
+static void gfs2_quota_scan(struct gfs2_sbd *sdp)
{
struct gfs2_quota_data *qd, *safe;
LIST_HEAD(dead);
@@ -1222,7 +1224,7 @@ void gfs2_quota_scan(struct gfs2_sbd *sdp)
gfs2_assert_warn(sdp, !qd->qd_bh_count);
gfs2_lvb_unhold(qd->qd_gl);
- kfree(qd);
+ kmem_cache_free(gfs2_quotad_cachep, qd);
}
}
@@ -1257,7 +1259,7 @@ void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
gfs2_assert_warn(sdp, !qd->qd_bh_count);
gfs2_lvb_unhold(qd->qd_gl);
- kfree(qd);
+ kmem_cache_free(gfs2_quotad_cachep, qd);
spin_lock(&sdp->sd_quota_spin);
}
@@ -1272,3 +1274,65 @@ void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
}
}
+static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
+{
+ if (error == 0 || error == -EROFS)
+ return;
+ if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
+ fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
+}
+
+static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
+ int (*fxn)(struct gfs2_sbd *sdp),
+ unsigned long t, unsigned long *timeo,
+ unsigned int *new_timeo)
+{
+ if (t >= *timeo) {
+ int error = fxn(sdp);
+ quotad_error(sdp, msg, error);
+ *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
+ } else {
+ *timeo -= t;
+ }
+}
+
+/**
+ * gfs2_quotad - Write cached quota changes into the quota file
+ * @sdp: Pointer to GFS2 superblock
+ *
+ */
+
+int gfs2_quotad(void *data)
+{
+ struct gfs2_sbd *sdp = data;
+ struct gfs2_tune *tune = &sdp->sd_tune;
+ unsigned long statfs_timeo = 0;
+ unsigned long quotad_timeo = 0;
+ unsigned long t = 0;
+ DEFINE_WAIT(wait);
+
+ while (!kthread_should_stop()) {
+
+ /* Update the master statfs file */
+ quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
+ &statfs_timeo, &tune->gt_statfs_quantum);
+
+ /* Update quota file */
+ quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
+ &quotad_timeo, &tune->gt_quota_quantum);
+
+ /* FIXME: This should be turned into a shrinker */
+ gfs2_quota_scan(sdp);
+
+ if (freezing(current))
+ refrigerator();
+ t = min(quotad_timeo, statfs_timeo);
+
+ prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_UNINTERRUPTIBLE);
+ t -= schedule_timeout(t);
+ finish_wait(&sdp->sd_quota_wait, &wait);
+ }
+
+ return 0;
+}
+