ocfs2: remove unused code

Remove node messaging code that becomes unused with the delete inode vote
removal.

[Removed even more cruft which I spotted during review --Mark]

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 7 insertions, 280 deletions

diff --git a/fs/ocfs2/vote.c b/fs/ocfs2/vote.c
index 1552d6449478..4f82a2f0efef 100644
--- a/fs/ocfs2/vote.c
+++ b/fs/ocfs2/vote.c
@@ -63,17 +63,10 @@ struct ocfs2_msg_hdr
         __be32 h_node_num;    /* node sending this particular message. */
 };
 
-/* OCFS2_MAX_FILENAME_LEN is 255 characters, but we want to align this
- * for the network. */
-#define OCFS2_VOTE_FILENAME_LEN 256
 struct ocfs2_vote_msg
 {
         struct ocfs2_msg_hdr v_hdr;
-        union {
-                __be32 v_generic1;
-                __be32 v_orphaned_slot; /* Used during delete votes */
-                __be32 v_nlink;         /* Used during unlink votes */
-        } md1;                          /* Message type dependant 1 */
+        __be32 v_reserved1;
 };
 
 /* Responses are given these values to maintain backwards
@@ -86,7 +79,6 @@ struct ocfs2_response_msg
 {
         struct ocfs2_msg_hdr r_hdr;
         __be32 r_response;
-        __be32 r_orphaned_slot;
 };
 
 struct ocfs2_vote_work {
@@ -96,7 +88,6 @@ struct ocfs2_vote_work {
 
 enum ocfs2_vote_request {
         OCFS2_VOTE_REQ_INVALID = 0,
-        OCFS2_VOTE_REQ_DELETE,
         OCFS2_VOTE_REQ_MOUNT,
         OCFS2_VOTE_REQ_UMOUNT,
         OCFS2_VOTE_REQ_LAST
@@ -151,135 +142,23 @@ static void ocfs2_process_umount_request(struct ocfs2_super *osb,
         ocfs2_node_map_set_bit(osb, &osb->umount_map, node_num);
 }
 
-void ocfs2_mark_inode_remotely_deleted(struct inode *inode)
-{
-        struct ocfs2_inode_info *oi = OCFS2_I(inode);
-
-        assert_spin_locked(&oi->ip_lock);
-        /* We set the SKIP_DELETE flag on the inode so we don't try to
-         * delete it in delete_inode ourselves, thus avoiding
-         * unecessary lock pinging. If the other node failed to wipe
-         * the inode as a result of a crash, then recovery will pick
-         * up the slack. */
-        oi->ip_flags |= OCFS2_INODE_DELETED|OCFS2_INODE_SKIP_DELETE;
-}
-
-static int ocfs2_process_delete_request(struct inode *inode,
-                                        int *orphaned_slot)
-{
-        int response = OCFS2_RESPONSE_BUSY;
-
-        mlog(0, "DELETE vote on inode %lu, read lnk_cnt = %u, slot = %d\n",
-             inode->i_ino, inode->i_nlink, *orphaned_slot);
-
-        spin_lock(&OCFS2_I(inode)->ip_lock);
-
-        /* Whatever our vote response is, we want to make sure that
-         * the orphaned slot is recorded properly on this node *and*
-         * on the requesting node. Technically, if the requesting node
-         * did not know which slot the inode is orphaned in but we
-         * respond with BUSY he doesn't actually need the orphaned
-         * slot, but it doesn't hurt to do it here anyway. */
-        if ((*orphaned_slot) != OCFS2_INVALID_SLOT) {
-                mlog_bug_on_msg(OCFS2_I(inode)->ip_orphaned_slot !=
-                                OCFS2_INVALID_SLOT &&
-                                OCFS2_I(inode)->ip_orphaned_slot !=
-                                (*orphaned_slot),
-                                "Inode %llu: This node thinks it's "
-                                "orphaned in slot %d, messaged it's in %d\n",
-                                (unsigned long long)OCFS2_I(inode)->ip_blkno,
-                                OCFS2_I(inode)->ip_orphaned_slot,
-                                *orphaned_slot);
-
-                mlog(0, "Setting orphaned slot for inode %llu to %d\n",
-                     (unsigned long long)OCFS2_I(inode)->ip_blkno,
-                     *orphaned_slot);
-
-                OCFS2_I(inode)->ip_orphaned_slot = *orphaned_slot;
-        } else {
-                mlog(0, "Sending back orphaned slot %d for inode %llu\n",
-                     OCFS2_I(inode)->ip_orphaned_slot,
-                     (unsigned long long)OCFS2_I(inode)->ip_blkno);
-
-                *orphaned_slot = OCFS2_I(inode)->ip_orphaned_slot;
-        }
-
-        /* vote no if the file is still open. */
-        if (OCFS2_I(inode)->ip_open_count) {
-                mlog(0, "open count = %u\n",
-                     OCFS2_I(inode)->ip_open_count);
-                spin_unlock(&OCFS2_I(inode)->ip_lock);
-                goto done;
-        }
-        spin_unlock(&OCFS2_I(inode)->ip_lock);
-
-        /* directories are a bit ugly... What if someone is sitting in
-         * it? We want to make sure the inode is removed completely as
-         * a result of the iput in process_vote. */
-        if (S_ISDIR(inode->i_mode) && (atomic_read(&inode->i_count) != 1)) {
-                mlog(0, "i_count = %u\n", atomic_read(&inode->i_count));
-                goto done;
-        }
-
-        if (filemap_fdatawrite(inode->i_mapping)) {
-                mlog(ML_ERROR, "Could not sync inode %llu for delete!\n",
-                     (unsigned long long)OCFS2_I(inode)->ip_blkno);
-                goto done;
-        }
-        sync_mapping_buffers(inode->i_mapping);
-        truncate_inode_pages(inode->i_mapping, 0);
-        ocfs2_extent_map_trunc(inode, 0);
-
-        spin_lock(&OCFS2_I(inode)->ip_lock);
-        /* double check open count - someone might have raced this
-         * thread into ocfs2_file_open while we were writing out
-         * data. If we're to allow a wipe of this inode now, we *must*
-         * hold the spinlock until we've marked it. */
-        if (OCFS2_I(inode)->ip_open_count) {
-                mlog(0, "Raced to wipe! open count = %u\n",
-                     OCFS2_I(inode)->ip_open_count);
-                spin_unlock(&OCFS2_I(inode)->ip_lock);
-                goto done;
-        }
-
-        /* Mark the inode as being wiped from disk. */
-        ocfs2_mark_inode_remotely_deleted(inode);
-        spin_unlock(&OCFS2_I(inode)->ip_lock);
-
-        /* Not sure this is necessary anymore. */
-        d_prune_aliases(inode);
-
-        /* If we get here, then we're voting 'yes', so commit the
-         * delete on our side. */
-        response = OCFS2_RESPONSE_OK;
-done:
-        return response;
-}
-
 static void ocfs2_process_vote(struct ocfs2_super *osb,
                                struct ocfs2_vote_msg *msg)
 {
         int net_status, vote_response;
-        int orphaned_slot = 0;
-        unsigned int node_num, generation;
+        unsigned int node_num;
         u64 blkno;
         enum ocfs2_vote_request request;
-        struct inode *inode = NULL;
         struct ocfs2_msg_hdr *hdr = &msg->v_hdr;
         struct ocfs2_response_msg response;
 
         /* decode the network mumbo jumbo into local variables. */
         request = be32_to_cpu(hdr->h_request);
         blkno = be64_to_cpu(hdr->h_blkno);
-        generation = be32_to_cpu(hdr->h_generation);
         node_num = be32_to_cpu(hdr->h_node_num);
-        if (request == OCFS2_VOTE_REQ_DELETE)
-                orphaned_slot = be32_to_cpu(msg->md1.v_orphaned_slot);
 
-        mlog(0, "processing vote: request = %u, blkno = %llu, "
-             "generation = %u, node_num = %u, priv1 = %u\n", request,
-             (unsigned long long)blkno, generation, node_num,
-             be32_to_cpu(msg->md1.v_generic1));
+        mlog(0, "processing vote: request = %u, blkno = %llu, node_num = %u\n",
+             request, (unsigned long long)blkno, node_num);
 
         if (!ocfs2_is_valid_vote_request(request)) {
                 mlog(ML_ERROR, "Invalid vote request %d from node %u\n",
@@ -302,52 +181,6 @@ static void ocfs2_process_vote(struct ocfs2_super *osb,
                 break;
         }
 
-        /* We cannot process the remaining message types before we're
-         * fully mounted. It's perfectly safe however to send a 'yes'
-         * response as we can't possibly have any of the state they're
-         * asking us to modify yet. */
-        if (atomic_read(&osb->vol_state) == VOLUME_INIT)
-                goto respond;
-
-        /* If we get here, then the request is against an inode. */
-        inode = ocfs2_ilookup_for_vote(osb, blkno,
-                                       request == OCFS2_VOTE_REQ_DELETE);
-
-        /* Not finding the inode is perfectly valid - it means we're
-         * not interested in what the other node is about to do to it
-         * so in those cases we automatically respond with an
-         * affirmative. Cluster locking ensures that we won't race
-         * interest in the inode with this vote request. */
-        if (!inode)
-                goto respond;
-
-        /* Check generation values. It's possible for us to get a
-         * request against a stale inode. If so then we proceed as if
-         * we had not found an inode in the first place. */
-        if (inode->i_generation != generation) {
-                mlog(0, "generation passed %u != inode generation = %u, "
-                     "ip_flags = %x, ip_blkno = %llu, msg %llu, i_count = %u, "
-                     "message type = %u\n", generation, inode->i_generation,
-                     OCFS2_I(inode)->ip_flags,
-                     (unsigned long long)OCFS2_I(inode)->ip_blkno,
-                     (unsigned long long)blkno, atomic_read(&inode->i_count),
-                     request);
-                iput(inode);
-                inode = NULL;
-                goto respond;
-        }
-
-        switch (request) {
-        case OCFS2_VOTE_REQ_DELETE:
-                vote_response = ocfs2_process_delete_request(inode,
-                                                             &orphaned_slot);
-                break;
-        default:
-                mlog(ML_ERROR, "node %u, invalid request: %u\n",
-                     node_num, request);
-                vote_response = OCFS2_RESPONSE_BAD_MSG;
-        }
-
 respond:
         /* Response struture is small so we just put it on the stack
          * and stuff it inline. */
@@ -357,7 +190,6 @@ respond:
         response.r_hdr.h_generation = hdr->h_generation;
         response.r_hdr.h_node_num = cpu_to_be32(osb->node_num);
         response.r_response = cpu_to_be32(vote_response);
-        response.r_orphaned_slot = cpu_to_be32(orphaned_slot);
 
         net_status = o2net_send_message(OCFS2_MESSAGE_TYPE_RESPONSE,
                                         osb->net_key,
@@ -373,9 +205,6 @@ respond:
             && net_status != -ENOTCONN)
                 mlog(ML_ERROR, "message to node %u fails with error %d!\n",
                      node_num, net_status);
-
-        if (inode)
-                iput(inode);
 }
 
 static void ocfs2_vote_thread_do_work(struct ocfs2_super *osb)
@@ -634,8 +463,7 @@ bail:
 static struct ocfs2_vote_msg * ocfs2_new_vote_request(struct ocfs2_super *osb,
                                                       u64 blkno,
                                                       unsigned int generation,
-                                                      enum ocfs2_vote_request type,
-                                                      u32 priv)
+                                                      enum ocfs2_vote_request type)
 {
         struct ocfs2_vote_msg *request;
         struct ocfs2_msg_hdr *hdr;
@@ -651,8 +479,6 @@ static struct ocfs2_vote_msg * ocfs2_new_vote_request(struct ocfs2_super *osb,
                 hdr->h_request = cpu_to_be32(type);
                 hdr->h_blkno = cpu_to_be64(blkno);
                 hdr->h_generation = cpu_to_be32(generation);
-
-                request->md1.v_generic1 = cpu_to_be32(priv);
         }
 
         return request;
@@ -686,109 +512,12 @@ bail:
         return status;
 }
 
-static int ocfs2_request_vote(struct inode *inode,
-                              struct ocfs2_vote_msg *request,
-                              struct ocfs2_net_response_cb *callback)
-{
-        int status;
-        struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-
-        if (ocfs2_inode_is_new(inode))
-                return 0;
-
-        status = -EAGAIN;
-        while (status == -EAGAIN) {
-                if (!(osb->s_mount_opt & OCFS2_MOUNT_NOINTR) &&
-                    signal_pending(current))
-                        return -ERESTARTSYS;
-
-                status = ocfs2_super_lock(osb, 0);
-                if (status < 0) {
-                        mlog_errno(status);
-                        break;
-                }
-
-                status = 0;
-                if (!ocfs2_node_map_is_only(osb, &osb->mounted_map,
-                                           osb->node_num))
-                        status = ocfs2_do_request_vote(osb, request, callback);
-
-                ocfs2_super_unlock(osb, 0);
-        }
-        return status;
-}
-
-static void ocfs2_delete_response_cb(void *priv,
-                                     struct ocfs2_response_msg *resp)
-{
-        int orphaned_slot, node;
-        struct inode *inode = priv;
-
-        orphaned_slot = be32_to_cpu(resp->r_orphaned_slot);
-        node = be32_to_cpu(resp->r_hdr.h_node_num);
-        mlog(0, "node %d tells us that inode %llu is orphaned in slot %d\n",
-             node, (unsigned long long)OCFS2_I(inode)->ip_blkno,
-             orphaned_slot);
-
-        /* The other node may not actually know which slot the inode
-         * is orphaned in. */
-        if (orphaned_slot == OCFS2_INVALID_SLOT)
-                return;
-
-        /* Ok, the responding node knows which slot this inode is
-         * orphaned in. We verify that the information is correct and
-         * then record this in the inode. ocfs2_delete_inode will use
-         * this information to determine which lock to take. */
-        spin_lock(&OCFS2_I(inode)->ip_lock);
-        mlog_bug_on_msg(OCFS2_I(inode)->ip_orphaned_slot != orphaned_slot &&
-                        OCFS2_I(inode)->ip_orphaned_slot
-                        != OCFS2_INVALID_SLOT, "Inode %llu: Node %d says it's "
-                        "orphaned in slot %d, we think it's in %d\n",
-                        (unsigned long long)OCFS2_I(inode)->ip_blkno,
-                        be32_to_cpu(resp->r_hdr.h_node_num),
-                        orphaned_slot, OCFS2_I(inode)->ip_orphaned_slot);
-
-        OCFS2_I(inode)->ip_orphaned_slot = orphaned_slot;
-        spin_unlock(&OCFS2_I(inode)->ip_lock);
-}
-
-int ocfs2_request_delete_vote(struct inode *inode)
-{
-        int orphaned_slot, status;
-        struct ocfs2_net_response_cb delete_cb;
-        struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-        struct ocfs2_vote_msg *request;
-
-        spin_lock(&OCFS2_I(inode)->ip_lock);
-        orphaned_slot = OCFS2_I(inode)->ip_orphaned_slot;
-        spin_unlock(&OCFS2_I(inode)->ip_lock);
-
-        delete_cb.rc_cb = ocfs2_delete_response_cb;
-        delete_cb.rc_priv = inode;
-
-        mlog(0, "Inode %llu, we start thinking orphaned slot is %d\n",
-             (unsigned long long)OCFS2_I(inode)->ip_blkno, orphaned_slot);
-
-        status = -ENOMEM;
-        request = ocfs2_new_vote_request(osb, OCFS2_I(inode)->ip_blkno,
-                                         inode->i_generation,
-                                         OCFS2_VOTE_REQ_DELETE, orphaned_slot);
-        if (request) {
-                status = ocfs2_request_vote(inode, request, &delete_cb);
-
-                kfree(request);
-        }
-
-        return status;
-}
-
 int ocfs2_request_mount_vote(struct ocfs2_super *osb)
 {
         int status;
         struct ocfs2_vote_msg *request = NULL;
 
-        request = ocfs2_new_vote_request(osb, 0ULL, 0,
-                                         OCFS2_VOTE_REQ_MOUNT, 0);
+        request = ocfs2_new_vote_request(osb, 0ULL, 0, OCFS2_VOTE_REQ_MOUNT);
         if (!request) {
                 status = -ENOMEM;
                 goto bail;
@@ -821,8 +550,7 @@ int ocfs2_request_umount_vote(struct ocfs2_super *osb)
         int status;
         struct ocfs2_vote_msg *request = NULL;
 
-        request = ocfs2_new_vote_request(osb, 0ULL, 0,
-                                         OCFS2_VOTE_REQ_UMOUNT, 0);
+        request = ocfs2_new_vote_request(osb, 0ULL, 0, OCFS2_VOTE_REQ_UMOUNT);
         if (!request) {
                 status = -ENOMEM;
                 goto bail;
@@ -969,7 +697,6 @@ static int ocfs2_handle_vote_message(struct o2net_msg *msg,
              be32_to_cpu(work->w_msg.v_hdr.h_generation));
         mlog(0, "h_node_num = %u\n",
              be32_to_cpu(work->w_msg.v_hdr.h_node_num));
-        mlog(0, "v_generic1 = %u\n", be32_to_cpu(work->w_msg.md1.v_generic1));
 
         spin_lock(&osb->vote_task_lock);
         list_add_tail(&work->w_list, &osb->vote_list);