ocfs2: remove unused code (68e2b740) · Commits · e / devices / android_kernel_samsung_exynos5433

fs/ocfs2/inode.c

+0 −40

Original line number	Diff line number	Diff line
		@@ -89,24 +89,6 @@ void ocfs2_set_inode_flags(struct inode *inode)
		inode->i_flags \|= S_DIRSYNC;
		}

		struct inode ocfs2_ilookup_for_vote(struct ocfs2_super osb,
		u64 blkno,
		int delete_vote)
		{
		struct ocfs2_find_inode_args args;

		/* ocfs2_ilookup_for_vote should only be called from the
		* vote thread */
		BUG_ON(current != osb->vote_task);

		args.fi_blkno = blkno;
		args.fi_flags = OCFS2_FI_FLAG_NOWAIT;
		if (delete_vote)
		args.fi_flags \|= OCFS2_FI_FLAG_DELETE;
		args.fi_ino = ino_from_blkno(osb->sb, blkno);
		return ilookup5(osb->sb, args.fi_ino, ocfs2_find_actor, &args);
		}

		struct inode ocfs2_iget(struct ocfs2_super osb, u64 blkno, int flags)
		{
		struct inode *inode = NULL;
		@@ -182,28 +164,6 @@ static int ocfs2_find_actor(struct inode inode, void opaque)
		if (oi->ip_blkno != args->fi_blkno)
		goto bail;

		/* OCFS2_FI_FLAG_NOWAIT is only set from
		* ocfs2_ilookup_for_vote which won't create an inode for one
		* that isn't found. The vote thread which doesn't want to get
		* an inode which is in the process of going away - otherwise
		* the call to __wait_on_freeing_inode in find_inode_fast will
		* cause it to deadlock on an inode which may be waiting on a
		* vote (or lock release) in delete_inode */
		if ((args->fi_flags & OCFS2_FI_FLAG_NOWAIT) &&
		(inode->i_state & (I_FREEING\|I_CLEAR))) {
		/* As stated above, we're not going to return an
		* inode. In the case of a delete vote, the voting
		* code is going to signal the other node to go
		* ahead. Mark that state here, so this freeing inode
		* has the state when it gets to delete_inode. */
		if (args->fi_flags & OCFS2_FI_FLAG_DELETE) {
		spin_lock(&oi->ip_lock);
		ocfs2_mark_inode_remotely_deleted(inode);
		spin_unlock(&oi->ip_lock);
		}
		goto bail;
		}

		ret = 1;
		bail:
		mlog_exit(ret);

fs/ocfs2/inode.h

+0 −6

Original line number	Diff line number	Diff line
		@@ -45,7 +45,6 @@ struct ocfs2_inode_info
		u32 ip_clusters;
		struct ocfs2_extent_map ip_map;
		struct list_head ip_io_markers;
		int ip_orphaned_slot;

		struct mutex ip_io_mutex;

		@@ -118,14 +117,9 @@ void ocfs2_delete_inode(struct inode *inode);
		void ocfs2_drop_inode(struct inode *inode);

		/* Flags for ocfs2_iget() */
		#define OCFS2_FI_FLAG_NOWAIT 0x1
		#define OCFS2_FI_FLAG_DELETE 0x2
		#define OCFS2_FI_FLAG_SYSFILE 0x4
		#define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x8
		struct inode ocfs2_iget(struct ocfs2_super osb, u64 feoff, int flags);
		struct inode ocfs2_ilookup_for_vote(struct ocfs2_super osb,
		u64 blkno,
		int delete_vote);
		int ocfs2_inode_init_private(struct inode *inode);
		int ocfs2_inode_revalidate(struct dentry *dentry);
		int ocfs2_populate_inode(struct inode inode, struct ocfs2_dinode fe,

fs/ocfs2/vote.c

+7 −280

Original line number	Diff line number	Diff line
		@@ -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);

fs/ocfs2/vote.h

+0 −3

Original line number	Diff line number	Diff line
		@@ -38,14 +38,11 @@ static inline void ocfs2_kick_vote_thread(struct ocfs2_super *osb)
		wake_up(&osb->vote_event);
		}

		int ocfs2_request_delete_vote(struct inode *inode);
		int ocfs2_request_mount_vote(struct ocfs2_super *osb);
		int ocfs2_request_umount_vote(struct ocfs2_super *osb);
		int ocfs2_register_net_handlers(struct ocfs2_super *osb);
		void ocfs2_unregister_net_handlers(struct ocfs2_super *osb);

		void ocfs2_mark_inode_remotely_deleted(struct inode *inode);

		void ocfs2_remove_node_from_vote_queues(struct ocfs2_super *osb,
		int node_num);
		#endif