__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
{
struct ocfs2_msg_hdr r_hdr;
__be32 r_response;
- __be32 r_orphaned_slot;
};
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
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",
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. */
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,
&& 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)
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;
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;
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;
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;
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);
projects / linux-2.6 / commitdiff