Re: [PATCH v4] libceph: introduce new option abort_on_full

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On 12/21/2018 04:04 AM, Ilya Dryomov wrote:
On Tue, Dec 18, 2018 at 10:32 AM Dongsheng Yang
<dongsheng.yang@xxxxxxxxxxxx> wrote:
Introduce a new option abort_on_full, default to false. Then
we can get -ENOSPC when the pool is full, or reaches quota.

Signed-off-by: Dongsheng Yang <dongsheng.yang@xxxxxxxxxxxx>
---
  fs/ceph/super.c                 | 2 +-
  include/linux/ceph/libceph.h    | 3 ++-
  include/linux/ceph/osd_client.h | 1 -
  net/ceph/ceph_common.c          | 8 ++++++++
  net/ceph/osd_client.c           | 4 ++--
  5 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index b5ecd6f..69ad691 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -640,7 +640,7 @@ static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
         opt = NULL; /* fsc->client now owns this */

         fsc->client->extra_mon_dispatch = extra_mon_dispatch;
-       fsc->client->osdc.abort_on_full = true;
+       ceph_set_opt(fsc->client, ABORT_ON_FULL);

         if (!fsopt->mds_namespace) {
                 ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP,
diff --git a/include/linux/ceph/libceph.h b/include/linux/ceph/libceph.h
index 68bb09c..9c48446 100644
--- a/include/linux/ceph/libceph.h
+++ b/include/linux/ceph/libceph.h
@@ -35,6 +35,7 @@
  #define CEPH_OPT_NOMSGAUTH       (1<<4) /* don't require msg signing feat */
  #define CEPH_OPT_TCP_NODELAY     (1<<5) /* TCP_NODELAY on TCP sockets */
  #define CEPH_OPT_NOMSGSIGN       (1<<6) /* don't sign msgs */
+#define CEPH_OPT_ABORT_ON_FULL   (1<<7) /* abort request with -ENOSPC when pool is full */

  #define CEPH_OPT_DEFAULT   (CEPH_OPT_TCP_NODELAY)

@@ -53,7 +54,7 @@ struct ceph_options {
         unsigned long osd_request_timeout;      /* jiffies */

         /*
-        * any type that can't be simply compared or doesn't need need
+        * any type that can't be simply compared or doesn't need
          * to be compared should go beyond this point,
          * ceph_compare_options() should be updated accordingly
          */
diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h
index 7a2af50..2294f96 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -354,7 +354,6 @@ struct ceph_osd_client {
         struct rb_root         linger_map_checks;
         atomic_t               num_requests;
         atomic_t               num_homeless;
-       bool                   abort_on_full; /* abort w/ ENOSPC when full */
         int                    abort_err;
         struct delayed_work    timeout_work;
         struct delayed_work    osds_timeout_work;
diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
index 87afb9e..e786ae8 100644
--- a/net/ceph/ceph_common.c
+++ b/net/ceph/ceph_common.c
@@ -255,6 +255,7 @@ enum {
         Opt_nocephx_sign_messages,
         Opt_tcp_nodelay,
         Opt_notcp_nodelay,
+       Opt_abort_on_full,
  };

  static match_table_t opt_tokens = {
@@ -280,6 +281,7 @@ enum {
         {Opt_nocephx_sign_messages, "nocephx_sign_messages"},
         {Opt_tcp_nodelay, "tcp_nodelay"},
         {Opt_notcp_nodelay, "notcp_nodelay"},
+       {Opt_abort_on_full, "abort_on_full"},
         {-1, NULL}
  };

@@ -535,6 +537,10 @@ struct ceph_options *
                         opt->flags &= ~CEPH_OPT_TCP_NODELAY;
                         break;

+               case Opt_abort_on_full:
+                       opt->flags |= CEPH_OPT_ABORT_ON_FULL;
+                       break;
+
                 default:
                         BUG_ON(token);
                 }
@@ -574,6 +580,8 @@ int ceph_print_client_options(struct seq_file *m, struct ceph_client *client)
                 seq_puts(m, "nocephx_sign_messages,");
         if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
                 seq_puts(m, "notcp_nodelay,");
+       if (opt->flags & CEPH_OPT_ABORT_ON_FULL)
+               seq_puts(m, "abort_on_full,");

         if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
                 seq_printf(m, "mount_timeout=%d,",
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index d23a9f8..fa9530d 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -2315,7 +2315,7 @@ static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
                    (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
                     pool_full(osdc, req->r_t.base_oloc.pool))) {
                 dout("req %p full/pool_full\n", req);
-               if (osdc->abort_on_full) {
+               if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
                         err = -ENOSPC;
                 } else {
                         pr_warn_ratelimited("FULL or reached pool quota\n");
@@ -2545,7 +2545,7 @@ static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
  {
         bool victims = false;

-       if (osdc->abort_on_full &&
+       if (ceph_test_opt(osdc->client, ABORT_ON_FULL) &&
             (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
                 for_each_request(osdc, abort_on_full_fn, &victims);
  }
Looks good, except we probably don't want "abort_on_full" in "mount"
output for the filesystem (it can't be disabled after all).  I'll see
if I can fix that and apply the patch tomorrow.

okey thanx

Thanks,

                 Ilya






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