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| author | Yan, Zheng <zyan@redhat.com> | 2019-07-25 20:16:47 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2019-09-16 12:06:24 +0200 |
| commit | 131d7eb4faa1fc06b08b633aff0b59ae85f1938e (patch) | |
| tree | 3d9fae4a3ef8e3d6eac0614a91cb83ac33583f4b /fs/ceph/super.c | |
| parent | 81f148a910045cd0a139f589a0b42764b172f8f5 (diff) | |
| download | lwn-131d7eb4faa1fc06b08b633aff0b59ae85f1938e.tar.gz lwn-131d7eb4faa1fc06b08b633aff0b59ae85f1938e.zip | |
ceph: auto reconnect after blacklisted
Make client use osd reply and session message to infer if itself is
blacklisted. Client reconnect to cluster using new entity addr if it
is blacklisted. Auto reconnect is limited to once every 30 minutes.
Auto reconnect is disabled by default. It can be enabled/disabled by
recover_session=<no|clean> mount option. In 'clean' mode, client drops
any dirty data/metadata, invalidates page caches and invalidates all
writable file handles. After reconnect, file locks become stale because
MDS loses track of them. If an inode contains any stale file locks,
read/write on the indoe are not allowed until applications release all
stale file locks.
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/super.c')
| -rw-r--r-- | fs/ceph/super.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 630549ac4f48..03b63b1cd32c 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -143,6 +143,7 @@ enum { Opt_snapdirname, Opt_mds_namespace, Opt_fscache_uniq, + Opt_recover_session, Opt_last_string, /* string args above */ Opt_dirstat, @@ -184,6 +185,7 @@ static match_table_t fsopt_tokens = { /* int args above */ {Opt_snapdirname, "snapdirname=%s"}, {Opt_mds_namespace, "mds_namespace=%s"}, + {Opt_recover_session, "recover_session=%s"}, {Opt_fscache_uniq, "fsc=%s"}, /* string args above */ {Opt_dirstat, "dirstat"}, @@ -254,6 +256,17 @@ static int parse_fsopt_token(char *c, void *private) if (!fsopt->mds_namespace) return -ENOMEM; break; + case Opt_recover_session: + if (!strncmp(argstr[0].from, "no", + argstr[0].to - argstr[0].from)) { + fsopt->flags &= ~CEPH_MOUNT_OPT_CLEANRECOVER; + } else if (!strncmp(argstr[0].from, "clean", + argstr[0].to - argstr[0].from)) { + fsopt->flags |= CEPH_MOUNT_OPT_CLEANRECOVER; + } else { + return -EINVAL; + } + break; case Opt_fscache_uniq: kfree(fsopt->fscache_uniq); fsopt->fscache_uniq = kstrndup(argstr[0].from, @@ -576,6 +589,10 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root) if (fsopt->mds_namespace) seq_show_option(m, "mds_namespace", fsopt->mds_namespace); + + if (fsopt->flags & CEPH_MOUNT_OPT_CLEANRECOVER) + seq_show_option(m, "recover_session", "clean"); + if (fsopt->wsize != CEPH_MAX_WRITE_SIZE) seq_printf(m, ",wsize=%d", fsopt->wsize); if (fsopt->rsize != CEPH_MAX_READ_SIZE) @@ -1169,6 +1186,8 @@ int ceph_force_reconnect(struct super_block *sb) ceph_reset_client_addr(fsc->client); ceph_osdc_clear_abort_err(&fsc->client->osdc); + + fsc->blacklisted = false; fsc->mount_state = CEPH_MOUNT_MOUNTED; if (sb->s_root) { |