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author | Goldwyn Rodrigues <rgoldwyn@suse.de> | 2014-01-21 15:48:22 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-21 16:19:41 -0800 |
commit | 66e188fc3173eaeb32d3479758685e34889aff14 (patch) | |
tree | a1ce65f346ec0290985dcbff78402d2f03d9edf4 /fs/ocfs2/stack_user.c | |
parent | c74a3bdd9b529d924d1abf986079b783dd105ace (diff) | |
download | linux-stable-66e188fc3173eaeb32d3479758685e34889aff14.tar.gz linux-stable-66e188fc3173eaeb32d3479758685e34889aff14.tar.bz2 linux-stable-66e188fc3173eaeb32d3479758685e34889aff14.zip |
ocfs2: add DLM recovery callbacks
These are the callbacks called by the fs/dlm code in case the membership
changes. If there is a failure while/during calling any of these, the
DLM creates a new membership and relays to the rest of the nodes.
- recover_prep() is called when DLM understands a node is down.
- recover_slot() is called once all nodes have acknowledged
recover_prep and recovery can begin.
- recover_done() is called once the recovery is complete. It returns
the new membership.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/stack_user.c')
-rw-r--r-- | fs/ocfs2/stack_user.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c index 286edf1e231f..4111855a4def 100644 --- a/fs/ocfs2/stack_user.c +++ b/fs/ocfs2/stack_user.c @@ -110,6 +110,8 @@ struct ocfs2_live_connection { struct list_head oc_list; struct ocfs2_cluster_connection *oc_conn; + atomic_t oc_this_node; + int oc_our_slot; }; struct ocfs2_control_private { @@ -799,6 +801,42 @@ static int fs_protocol_compare(struct ocfs2_protocol_version *existing, return 0; } +static void user_recover_prep(void *arg) +{ +} + +static void user_recover_slot(void *arg, struct dlm_slot *slot) +{ + struct ocfs2_cluster_connection *conn = arg; + printk(KERN_INFO "ocfs2: Node %d/%d down. Initiating recovery.\n", + slot->nodeid, slot->slot); + conn->cc_recovery_handler(slot->nodeid, conn->cc_recovery_data); + +} + +static void user_recover_done(void *arg, struct dlm_slot *slots, + int num_slots, int our_slot, + uint32_t generation) +{ + struct ocfs2_cluster_connection *conn = arg; + struct ocfs2_live_connection *lc = conn->cc_private; + int i; + + for (i = 0; i < num_slots; i++) + if (slots[i].slot == our_slot) { + atomic_set(&lc->oc_this_node, slots[i].nodeid); + break; + } + + lc->oc_our_slot = our_slot; +} + +const struct dlm_lockspace_ops ocfs2_ls_ops = { + .recover_prep = user_recover_prep, + .recover_slot = user_recover_slot, + .recover_done = user_recover_done, +}; + static int user_cluster_connect(struct ocfs2_cluster_connection *conn) { dlm_lockspace_t *fsdlm; |