1 files changed, 0 insertions, 576 deletions

diff --git a/ANDROID_3.4.5/fs/dlm/rcom.c b/ANDROID_3.4.5/fs/dlm/rcom.c
deleted file mode 100644
index ac5c616c..00000000
--- a/ANDROID_3.4.5/fs/dlm/rcom.c
+++ /dev/null
@@ -1,576 +0,0 @@
-/******************************************************************************
-*******************************************************************************
-**
-**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
-**  Copyright (C) 2005-2008 Red Hat, Inc.  All rights reserved.
-**
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
-**
-*******************************************************************************
-******************************************************************************/
-
-#include "dlm_internal.h"
-#include "lockspace.h"
-#include "member.h"
-#include "lowcomms.h"
-#include "midcomms.h"
-#include "rcom.h"
-#include "recover.h"
-#include "dir.h"
-#include "config.h"
-#include "memory.h"
-#include "lock.h"
-#include "util.h"
-#include "member.h"
-
-
-static int rcom_response(struct dlm_ls *ls)
-{
-	return test_bit(LSFL_RCOM_READY, &ls->ls_flags);
-}
-
-static int create_rcom(struct dlm_ls *ls, int to_nodeid, int type, int len,
-		       struct dlm_rcom **rc_ret, struct dlm_mhandle **mh_ret)
-{
-	struct dlm_rcom *rc;
-	struct dlm_mhandle *mh;
-	char *mb;
-	int mb_len = sizeof(struct dlm_rcom) + len;
-
-	mh = dlm_lowcomms_get_buffer(to_nodeid, mb_len, GFP_NOFS, &mb);
-	if (!mh) {
-		log_print("create_rcom to %d type %d len %d ENOBUFS",
-			  to_nodeid, type, len);
-		return -ENOBUFS;
-	}
-	memset(mb, 0, mb_len);
-
-	rc = (struct dlm_rcom *) mb;
-
-	rc->rc_header.h_version = (DLM_HEADER_MAJOR | DLM_HEADER_MINOR);
-	rc->rc_header.h_lockspace = ls->ls_global_id;
-	rc->rc_header.h_nodeid = dlm_our_nodeid();
-	rc->rc_header.h_length = mb_len;
-	rc->rc_header.h_cmd = DLM_RCOM;
-
-	rc->rc_type = type;
-
-	spin_lock(&ls->ls_recover_lock);
-	rc->rc_seq = ls->ls_recover_seq;
-	spin_unlock(&ls->ls_recover_lock);
-
-	*mh_ret = mh;
-	*rc_ret = rc;
-	return 0;
-}
-
-static void send_rcom(struct dlm_ls *ls, struct dlm_mhandle *mh,
-		      struct dlm_rcom *rc)
-{
-	dlm_rcom_out(rc);
-	dlm_lowcomms_commit_buffer(mh);
-}
-
-static void set_rcom_status(struct dlm_ls *ls, struct rcom_status *rs,
-			    uint32_t flags)
-{
-	rs->rs_flags = cpu_to_le32(flags);
-}
-
-/* When replying to a status request, a node also sends back its
-   configuration values.  The requesting node then checks that the remote
-   node is configured the same way as itself. */
-
-static void set_rcom_config(struct dlm_ls *ls, struct rcom_config *rf,
-			    uint32_t num_slots)
-{
-	rf->rf_lvblen = cpu_to_le32(ls->ls_lvblen);
-	rf->rf_lsflags = cpu_to_le32(ls->ls_exflags);
-
-	rf->rf_our_slot = cpu_to_le16(ls->ls_slot);
-	rf->rf_num_slots = cpu_to_le16(num_slots);
-	rf->rf_generation =  cpu_to_le32(ls->ls_generation);
-}
-
-static int check_rcom_config(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
-{
-	struct rcom_config *rf = (struct rcom_config *) rc->rc_buf;
-
-	if ((rc->rc_header.h_version & 0xFFFF0000) != DLM_HEADER_MAJOR) {
-		log_error(ls, "version mismatch: %x nodeid %d: %x",
-			  DLM_HEADER_MAJOR | DLM_HEADER_MINOR, nodeid,
-			  rc->rc_header.h_version);
-		return -EPROTO;
-	}
-
-	if (le32_to_cpu(rf->rf_lvblen) != ls->ls_lvblen ||
-	    le32_to_cpu(rf->rf_lsflags) != ls->ls_exflags) {
-		log_error(ls, "config mismatch: %d,%x nodeid %d: %d,%x",
-			  ls->ls_lvblen, ls->ls_exflags, nodeid,
-			  le32_to_cpu(rf->rf_lvblen),
-			  le32_to_cpu(rf->rf_lsflags));
-		return -EPROTO;
-	}
-	return 0;
-}
-
-static void allow_sync_reply(struct dlm_ls *ls, uint64_t *new_seq)
-{
-	spin_lock(&ls->ls_rcom_spin);
-	*new_seq = ++ls->ls_rcom_seq;
-	set_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
-	spin_unlock(&ls->ls_rcom_spin);
-}
-
-static void disallow_sync_reply(struct dlm_ls *ls)
-{
-	spin_lock(&ls->ls_rcom_spin);
-	clear_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
-	clear_bit(LSFL_RCOM_READY, &ls->ls_flags);
-	spin_unlock(&ls->ls_rcom_spin);
-}
-
-/*
- * low nodeid gathers one slot value at a time from each node.
- * it sets need_slots=0, and saves rf_our_slot returned from each
- * rcom_config.
- *
- * other nodes gather all slot values at once from the low nodeid.
- * they set need_slots=1, and ignore the rf_our_slot returned from each
- * rcom_config.  they use the rf_num_slots returned from the low
- * node's rcom_config.
- */
-
-int dlm_rcom_status(struct dlm_ls *ls, int nodeid, uint32_t status_flags)
-{
-	struct dlm_rcom *rc;
-	struct dlm_mhandle *mh;
-	int error = 0;
-
-	ls->ls_recover_nodeid = nodeid;
-
-	if (nodeid == dlm_our_nodeid()) {
-		rc = ls->ls_recover_buf;
-		rc->rc_result = dlm_recover_status(ls);
-		goto out;
-	}
-
-	error = create_rcom(ls, nodeid, DLM_RCOM_STATUS,
-			    sizeof(struct rcom_status), &rc, &mh);
-	if (error)
-		goto out;
-
-	set_rcom_status(ls, (struct rcom_status *)rc->rc_buf, status_flags);
-
-	allow_sync_reply(ls, &rc->rc_id);
-	memset(ls->ls_recover_buf, 0, dlm_config.ci_buffer_size);
-
-	send_rcom(ls, mh, rc);
-
-	error = dlm_wait_function(ls, &rcom_response);
-	disallow_sync_reply(ls);
-	if (error)
-		goto out;
-
-	rc = ls->ls_recover_buf;
-
-	if (rc->rc_result == -ESRCH) {
-		/* we pretend the remote lockspace exists with 0 status */
-		log_debug(ls, "remote node %d not ready", nodeid);
-		rc->rc_result = 0;
-		error = 0;
-	} else {
-		error = check_rcom_config(ls, rc, nodeid);
-	}
-
-	/* the caller looks at rc_result for the remote recovery status */
- out:
-	return error;
-}
-
-static void receive_rcom_status(struct dlm_ls *ls, struct dlm_rcom *rc_in)
-{
-	struct dlm_rcom *rc;
-	struct dlm_mhandle *mh;
-	struct rcom_status *rs;
-	uint32_t status;
-	int nodeid = rc_in->rc_header.h_nodeid;
-	int len = sizeof(struct rcom_config);
-	int num_slots = 0;
-	int error;
-
-	if (!dlm_slots_version(&rc_in->rc_header)) {
-		status = dlm_recover_status(ls);
-		goto do_create;
-	}
-
-	rs = (struct rcom_status *)rc_in->rc_buf;
-
-	if (!(rs->rs_flags & DLM_RSF_NEED_SLOTS)) {
-		status = dlm_recover_status(ls);
-		goto do_create;
-	}
-
-	spin_lock(&ls->ls_recover_lock);
-	status = ls->ls_recover_status;
-	num_slots = ls->ls_num_slots;
-	spin_unlock(&ls->ls_recover_lock);
-	len += num_slots * sizeof(struct rcom_slot);
-
- do_create:
-	error = create_rcom(ls, nodeid, DLM_RCOM_STATUS_REPLY,
-			    len, &rc, &mh);
-	if (error)
-		return;
-
-	rc->rc_id = rc_in->rc_id;
-	rc->rc_seq_reply = rc_in->rc_seq;
-	rc->rc_result = status;
-
-	set_rcom_config(ls, (struct rcom_config *)rc->rc_buf, num_slots);
-
-	if (!num_slots)
-		goto do_send;
-
-	spin_lock(&ls->ls_recover_lock);
-	if (ls->ls_num_slots != num_slots) {
-		spin_unlock(&ls->ls_recover_lock);
-		log_debug(ls, "receive_rcom_status num_slots %d to %d",
-			  num_slots, ls->ls_num_slots);
-		rc->rc_result = 0;
-		set_rcom_config(ls, (struct rcom_config *)rc->rc_buf, 0);
-		goto do_send;
-	}
-
-	dlm_slots_copy_out(ls, rc);
-	spin_unlock(&ls->ls_recover_lock);
-
- do_send:
-	send_rcom(ls, mh, rc);
-}
-
-static void receive_sync_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
-{
-	spin_lock(&ls->ls_rcom_spin);
-	if (!test_bit(LSFL_RCOM_WAIT, &ls->ls_flags) ||
-	    rc_in->rc_id != ls->ls_rcom_seq) {
-		log_debug(ls, "reject reply %d from %d seq %llx expect %llx",
-			  rc_in->rc_type, rc_in->rc_header.h_nodeid,
-			  (unsigned long long)rc_in->rc_id,
-			  (unsigned long long)ls->ls_rcom_seq);
-		goto out;
-	}
-	memcpy(ls->ls_recover_buf, rc_in, rc_in->rc_header.h_length);
-	set_bit(LSFL_RCOM_READY, &ls->ls_flags);
-	clear_bit(LSFL_RCOM_WAIT, &ls->ls_flags);
-	wake_up(&ls->ls_wait_general);
- out:
-	spin_unlock(&ls->ls_rcom_spin);
-}
-
-int dlm_rcom_names(struct dlm_ls *ls, int nodeid, char *last_name, int last_len)
-{
-	struct dlm_rcom *rc;
-	struct dlm_mhandle *mh;
-	int error = 0;
-	int max_size = dlm_config.ci_buffer_size - sizeof(struct dlm_rcom);
-
-	ls->ls_recover_nodeid = nodeid;
-
-	if (nodeid == dlm_our_nodeid()) {
-		ls->ls_recover_buf->rc_header.h_length =
-			dlm_config.ci_buffer_size;
-		dlm_copy_master_names(ls, last_name, last_len,
-		                      ls->ls_recover_buf->rc_buf,
-		                      max_size, nodeid);
-		goto out;
-	}
-
-	error = create_rcom(ls, nodeid, DLM_RCOM_NAMES, last_len, &rc, &mh);
-	if (error)
-		goto out;
-	memcpy(rc->rc_buf, last_name, last_len);
-
-	allow_sync_reply(ls, &rc->rc_id);
-	memset(ls->ls_recover_buf, 0, dlm_config.ci_buffer_size);
-
-	send_rcom(ls, mh, rc);
-
-	error = dlm_wait_function(ls, &rcom_response);
-	disallow_sync_reply(ls);
- out:
-	return error;
-}
-
-static void receive_rcom_names(struct dlm_ls *ls, struct dlm_rcom *rc_in)
-{
-	struct dlm_rcom *rc;
-	struct dlm_mhandle *mh;
-	int error, inlen, outlen, nodeid;
-
-	nodeid = rc_in->rc_header.h_nodeid;
-	inlen = rc_in->rc_header.h_length - sizeof(struct dlm_rcom);
-	outlen = dlm_config.ci_buffer_size - sizeof(struct dlm_rcom);
-
-	error = create_rcom(ls, nodeid, DLM_RCOM_NAMES_REPLY, outlen, &rc, &mh);
-	if (error)
-		return;
-	rc->rc_id = rc_in->rc_id;
-	rc->rc_seq_reply = rc_in->rc_seq;
-
-	dlm_copy_master_names(ls, rc_in->rc_buf, inlen, rc->rc_buf, outlen,
-			      nodeid);
-	send_rcom(ls, mh, rc);
-}
-
-int dlm_send_rcom_lookup(struct dlm_rsb *r, int dir_nodeid)
-{
-	struct dlm_rcom *rc;
-	struct dlm_mhandle *mh;
-	struct dlm_ls *ls = r->res_ls;
-	int error;
-
-	error = create_rcom(ls, dir_nodeid, DLM_RCOM_LOOKUP, r->res_length,
-			    &rc, &mh);
-	if (error)
-		goto out;
-	memcpy(rc->rc_buf, r->res_name, r->res_length);
-	rc->rc_id = (unsigned long) r;
-
-	send_rcom(ls, mh, rc);
- out:
-	return error;
-}
-
-static void receive_rcom_lookup(struct dlm_ls *ls, struct dlm_rcom *rc_in)
-{
-	struct dlm_rcom *rc;
-	struct dlm_mhandle *mh;
-	int error, ret_nodeid, nodeid = rc_in->rc_header.h_nodeid;
-	int len = rc_in->rc_header.h_length - sizeof(struct dlm_rcom);
-
-	error = create_rcom(ls, nodeid, DLM_RCOM_LOOKUP_REPLY, 0, &rc, &mh);
-	if (error)
-		return;
-
-	error = dlm_dir_lookup(ls, nodeid, rc_in->rc_buf, len, &ret_nodeid);
-	if (error)
-		ret_nodeid = error;
-	rc->rc_result = ret_nodeid;
-	rc->rc_id = rc_in->rc_id;
-	rc->rc_seq_reply = rc_in->rc_seq;
-
-	send_rcom(ls, mh, rc);
-}
-
-static void receive_rcom_lookup_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
-{
-	dlm_recover_master_reply(ls, rc_in);
-}
-
-static void pack_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb,
-			   struct rcom_lock *rl)
-{
-	memset(rl, 0, sizeof(*rl));
-
-	rl->rl_ownpid = cpu_to_le32(lkb->lkb_ownpid);
-	rl->rl_lkid = cpu_to_le32(lkb->lkb_id);
-	rl->rl_exflags = cpu_to_le32(lkb->lkb_exflags);
-	rl->rl_flags = cpu_to_le32(lkb->lkb_flags);
-	rl->rl_lvbseq = cpu_to_le32(lkb->lkb_lvbseq);
-	rl->rl_rqmode = lkb->lkb_rqmode;
-	rl->rl_grmode = lkb->lkb_grmode;
-	rl->rl_status = lkb->lkb_status;
-	rl->rl_wait_type = cpu_to_le16(lkb->lkb_wait_type);
-
-	if (lkb->lkb_bastfn)
-		rl->rl_asts |= DLM_CB_BAST;
-	if (lkb->lkb_astfn)
-		rl->rl_asts |= DLM_CB_CAST;
-
-	rl->rl_namelen = cpu_to_le16(r->res_length);
-	memcpy(rl->rl_name, r->res_name, r->res_length);
-
-	/* FIXME: might we have an lvb without DLM_LKF_VALBLK set ?
-	   If so, receive_rcom_lock_args() won't take this copy. */
-
-	if (lkb->lkb_lvbptr)
-		memcpy(rl->rl_lvb, lkb->lkb_lvbptr, r->res_ls->ls_lvblen);
-}
-
-int dlm_send_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
-{
-	struct dlm_ls *ls = r->res_ls;
-	struct dlm_rcom *rc;
-	struct dlm_mhandle *mh;
-	struct rcom_lock *rl;
-	int error, len = sizeof(struct rcom_lock);
-
-	if (lkb->lkb_lvbptr)
-		len += ls->ls_lvblen;
-
-	error = create_rcom(ls, r->res_nodeid, DLM_RCOM_LOCK, len, &rc, &mh);
-	if (error)
-		goto out;
-
-	rl = (struct rcom_lock *) rc->rc_buf;
-	pack_rcom_lock(r, lkb, rl);
-	rc->rc_id = (unsigned long) r;
-
-	send_rcom(ls, mh, rc);
- out:
-	return error;
-}
-
-/* needs at least dlm_rcom + rcom_lock */
-static void receive_rcom_lock(struct dlm_ls *ls, struct dlm_rcom *rc_in)
-{
-	struct dlm_rcom *rc;
-	struct dlm_mhandle *mh;
-	int error, nodeid = rc_in->rc_header.h_nodeid;
-
-	dlm_recover_master_copy(ls, rc_in);
-
-	error = create_rcom(ls, nodeid, DLM_RCOM_LOCK_REPLY,
-			    sizeof(struct rcom_lock), &rc, &mh);
-	if (error)
-		return;
-
-	/* We send back the same rcom_lock struct we received, but
-	   dlm_recover_master_copy() has filled in rl_remid and rl_result */
-
-	memcpy(rc->rc_buf, rc_in->rc_buf, sizeof(struct rcom_lock));
-	rc->rc_id = rc_in->rc_id;
-	rc->rc_seq_reply = rc_in->rc_seq;
-
-	send_rcom(ls, mh, rc);
-}
-
-/* If the lockspace doesn't exist then still send a status message
-   back; it's possible that it just doesn't have its global_id yet. */
-
-int dlm_send_ls_not_ready(int nodeid, struct dlm_rcom *rc_in)
-{
-	struct dlm_rcom *rc;
-	struct rcom_config *rf;
-	struct dlm_mhandle *mh;
-	char *mb;
-	int mb_len = sizeof(struct dlm_rcom) + sizeof(struct rcom_config);
-
-	mh = dlm_lowcomms_get_buffer(nodeid, mb_len, GFP_NOFS, &mb);
-	if (!mh)
-		return -ENOBUFS;
-	memset(mb, 0, mb_len);
-
-	rc = (struct dlm_rcom *) mb;
-
-	rc->rc_header.h_version = (DLM_HEADER_MAJOR | DLM_HEADER_MINOR);
-	rc->rc_header.h_lockspace = rc_in->rc_header.h_lockspace;
-	rc->rc_header.h_nodeid = dlm_our_nodeid();
-	rc->rc_header.h_length = mb_len;
-	rc->rc_header.h_cmd = DLM_RCOM;
-
-	rc->rc_type = DLM_RCOM_STATUS_REPLY;
-	rc->rc_id = rc_in->rc_id;
-	rc->rc_seq_reply = rc_in->rc_seq;
-	rc->rc_result = -ESRCH;
-
-	rf = (struct rcom_config *) rc->rc_buf;
-	rf->rf_lvblen = cpu_to_le32(~0U);
-
-	dlm_rcom_out(rc);
-	dlm_lowcomms_commit_buffer(mh);
-
-	return 0;
-}
-
-static int is_old_reply(struct dlm_ls *ls, struct dlm_rcom *rc)
-{
-	uint64_t seq;
-	int rv = 0;
-
-	switch (rc->rc_type) {
-	case DLM_RCOM_STATUS_REPLY:
-	case DLM_RCOM_NAMES_REPLY:
-	case DLM_RCOM_LOOKUP_REPLY:
-	case DLM_RCOM_LOCK_REPLY:
-		spin_lock(&ls->ls_recover_lock);
-		seq = ls->ls_recover_seq;
-		spin_unlock(&ls->ls_recover_lock);
-		if (rc->rc_seq_reply != seq) {
-			log_debug(ls, "ignoring old reply %x from %d "
-				      "seq_reply %llx expect %llx",
-				      rc->rc_type, rc->rc_header.h_nodeid,
-				      (unsigned long long)rc->rc_seq_reply,
-				      (unsigned long long)seq);
-			rv = 1;
-		}
-	}
-	return rv;
-}
-
-/* Called by dlm_recv; corresponds to dlm_receive_message() but special
-   recovery-only comms are sent through here. */
-
-void dlm_receive_rcom(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
-{
-	int lock_size = sizeof(struct dlm_rcom) + sizeof(struct rcom_lock);
-
-	if (dlm_recovery_stopped(ls) && (rc->rc_type != DLM_RCOM_STATUS)) {
-		log_debug(ls, "ignoring recovery message %x from %d",
-			  rc->rc_type, nodeid);
-		goto out;
-	}
-
-	if (is_old_reply(ls, rc))
-		goto out;
-
-	switch (rc->rc_type) {
-	case DLM_RCOM_STATUS:
-		receive_rcom_status(ls, rc);
-		break;
-
-	case DLM_RCOM_NAMES:
-		receive_rcom_names(ls, rc);
-		break;
-
-	case DLM_RCOM_LOOKUP:
-		receive_rcom_lookup(ls, rc);
-		break;
-
-	case DLM_RCOM_LOCK:
-		if (rc->rc_header.h_length < lock_size)
-			goto Eshort;
-		receive_rcom_lock(ls, rc);
-		break;
-
-	case DLM_RCOM_STATUS_REPLY:
-		receive_sync_reply(ls, rc);
-		break;
-
-	case DLM_RCOM_NAMES_REPLY:
-		receive_sync_reply(ls, rc);
-		break;
-
-	case DLM_RCOM_LOOKUP_REPLY:
-		receive_rcom_lookup_reply(ls, rc);
-		break;
-
-	case DLM_RCOM_LOCK_REPLY:
-		if (rc->rc_header.h_length < lock_size)
-			goto Eshort;
-		dlm_recover_process_copy(ls, rc);
-		break;
-
-	default:
-		log_error(ls, "receive_rcom bad type %d", rc->rc_type);
-	}
-out:
-	return;
-Eshort:
-	log_error(ls, "recovery message %x from %d is too short",
-			  rc->rc_type, nodeid);
-}
-