summaryrefslogtreecommitdiffstats
path: root/xlators/storage/posix/src/posix-helpers.c
diff options
context:
space:
mode:
authorMohit Agrawal <moagrawa@redhat.com>2017-07-15 17:55:14 +0530
committerJeff Darcy <jeff@pl.atyp.us>2017-07-25 15:36:55 +0000
commiteb266ade1e2da5739ed66495755ec2784a5bf74b (patch)
tree7344acb564f15da30f8279670bfdc56b96b21a7c /xlators/storage/posix/src/posix-helpers.c
parent7140858c3816c89d22d81ddfaa1d270db5dfd622 (diff)
posix: Needs to reserve disk space to prevent the brick from getting full
Problem: Currently there is no option available at posix xlator to save the disk from getting full Solution: Introduce a new option storage.reserve at posix xlator to configure disk threshold.posix xlator spawn a thread to update the disk space status in posix private structure and same flag is checked by every posix fop before start operation.If flag value is 1 then it sets op_errno to ENOSPC and goto out from the fop. BUG: 1471366 Change-Id: I98287cd409860f4c754fc69a332e0521bfb1b67e Signed-off-by: Mohit Agrawal <moagrawa@redhat.com> Reviewed-on: https://review.gluster.org/17780 Smoke: Gluster Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.org> Reviewed-by: Amar Tumballi <amarts@redhat.com> Reviewed-by: Jeff Darcy <jeff@pl.atyp.us>
Diffstat (limited to 'xlators/storage/posix/src/posix-helpers.c')
-rw-r--r--xlators/storage/posix/src/posix-helpers.c115
1 files changed, 115 insertions, 0 deletions
diff --git a/xlators/storage/posix/src/posix-helpers.c b/xlators/storage/posix/src/posix-helpers.c
index 2d193cc..1530b11 100644
--- a/xlators/storage/posix/src/posix-helpers.c
+++ b/xlators/storage/posix/src/posix-helpers.c
@@ -1970,6 +1970,121 @@ unlock:
UNLOCK (&priv->lock);
}
+void
+posix_disk_space_check (xlator_t *this)
+{
+ struct posix_private *priv = NULL;
+ char *subvol_path = NULL;
+ int op_ret = 0;
+ int percent = 0;
+ struct statvfs buf = {0};
+ uint64_t totsz = 0;
+ uint64_t freesz = 0;
+
+ GF_VALIDATE_OR_GOTO (this->name, this, out);
+ priv = this->private;
+ GF_VALIDATE_OR_GOTO ("posix-helpers", priv, out);
+
+ subvol_path = priv->base_path;
+ percent = priv->disk_threshhold;
+
+ op_ret = sys_statvfs (subvol_path, &buf);
+
+ if (op_ret == -1) {
+ gf_msg (this->name, GF_LOG_ERROR, errno, P_MSG_STATVFS_FAILED,
+ "statvfs failed on %s", subvol_path);
+ goto out;
+ }
+ totsz = (buf.f_blocks * buf.f_bsize);
+ freesz = (buf.f_bfree * buf.f_bsize);
+
+ if (freesz <= ((totsz * percent) / 100)) {
+ priv->disk_space_full = 1;
+ } else {
+ priv->disk_space_full = 0;
+ }
+out:
+ return;
+}
+
+
+static void *
+posix_disk_space_check_thread_proc (void *data)
+{
+ xlator_t *this = NULL;
+ struct posix_private *priv = NULL;
+ uint32_t interval = 0;
+ int ret = -1;
+
+ this = data;
+ priv = this->private;
+
+ interval = 5;
+ gf_msg_debug (this->name, 0, "disk-space thread started, "
+ "interval = %d seconds", interval);
+ while (1) {
+ /* aborting sleep() is a request to exit this thread, sleep()
+ * will normally not return when cancelled */
+ ret = sleep (interval);
+ if (ret > 0)
+ break;
+ /* prevent thread errors while doing the health-check(s) */
+ pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, NULL);
+
+ /* Do the disk-check.*/
+ posix_disk_space_check (this);
+ if (!priv->disk_space_check_active)
+ goto out;
+ pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, NULL);
+ }
+
+out:
+ gf_msg_debug (this->name, 0, "disk space check thread exiting");
+ LOCK (&priv->lock);
+ {
+ priv->disk_space_check_active = _gf_false;
+ }
+ UNLOCK (&priv->lock);
+
+
+ return NULL;
+}
+
+void
+posix_spawn_disk_space_check_thread (xlator_t *xl)
+{
+ struct posix_private *priv = NULL;
+ int ret = -1;
+
+ priv = xl->private;
+
+ LOCK (&priv->lock);
+ {
+ /* cancel the running thread */
+ if (priv->disk_space_check_active == _gf_true) {
+ pthread_cancel (priv->disk_space_check);
+ priv->disk_space_check_active = _gf_false;
+ }
+
+ ret = gf_thread_create (&priv->disk_space_check, NULL,
+ posix_disk_space_check_thread_proc,
+ xl, "posix_reserve");
+ if (ret < 0) {
+ priv->disk_space_check_active = _gf_false;
+ gf_msg (xl->name, GF_LOG_ERROR, errno,
+ P_MSG_DISK_SPACE_CHECK_FAILED,
+ "unable to setup disk space check thread");
+ goto unlock;
+ }
+
+ /* run the thread detached, resources will be freed on exit */
+ pthread_detach (priv->disk_space_check);
+ priv->disk_space_check_active = _gf_true;
+ }
+unlock:
+ UNLOCK (&priv->lock);
+}
+
int
posix_fsyncer_pick (xlator_t *this, struct list_head *head)
{