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| author | Xiubo Li <xiubli@redhat.com> | 2021-08-18 03:31:19 +0200 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2021-09-02 22:49:17 +0200 |
| commit | d517b3983dd3106ca92d6c5d0d09415a4a09481c (patch) | |
| tree | 91e166fe30149dd653a64b60a65ab84e175a8670 /fs/ceph/mdsmap.c | |
| parent | ceph: print more information when we can't find snaprealm (diff) | |
| download | linux-d517b3983dd3106ca92d6c5d0d09415a4a09481c.tar.xz linux-d517b3983dd3106ca92d6c5d0d09415a4a09481c.zip | |
ceph: reconnect to the export targets on new mdsmaps
In the case where the export MDS has crashed just after the EImportStart
journal is flushed, a standby MDS takes over for it and when replaying
the EImportStart journal the MDS will wait the client to reconnect. That
may never happen because the client may not have registered or opened
the sessions yet.
When receiving a new map, ensure we reconnect to valid export targets as
well if their sessions don't exist yet.
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/mdsmap.c')
| -rw-r--r-- | fs/ceph/mdsmap.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/ceph/mdsmap.c b/fs/ceph/mdsmap.c index 3c444b9cb17b..61d67cbcb367 100644 --- a/fs/ceph/mdsmap.c +++ b/fs/ceph/mdsmap.c @@ -122,6 +122,7 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end, bool msgr2) int err; u8 mdsmap_v; u16 mdsmap_ev; + u32 target; m = kzalloc(sizeof(*m), GFP_NOFS); if (!m) @@ -260,9 +261,14 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end, bool msgr2) sizeof(u32), GFP_NOFS); if (!info->export_targets) goto nomem; - for (j = 0; j < num_export_targets; j++) - info->export_targets[j] = - ceph_decode_32(&pexport_targets); + for (j = 0; j < num_export_targets; j++) { + target = ceph_decode_32(&pexport_targets); + if (target >= m->possible_max_rank) { + err = -EIO; + goto corrupt; + } + info->export_targets[j] = target; + } } else { info->export_targets = NULL; } |