This really should be done in mdadm, not mdmon. We ensure the device won't be suddenly commited as a hot-spare using O_EXCL, then check the 'holders' sysfs directory to make sure it is only in use once.
55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
/*
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* Copyright (C) 2008 Intel Corporation
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*
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* mdmon socket / message handling
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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struct mdinfo;
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struct mdinfo;
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struct md_message {
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int seq;
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int num_bytes;
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void *buf;
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};
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enum md_message_action {
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md_action_ping_monitor,
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};
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struct md_generic_cmd {
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enum md_message_action action;
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};
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/* union of all known command types, used to sanity check ->num_bytes
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* on the receive path
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*/
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union md_message_commands {
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struct md_generic_cmd generic;
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};
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extern const int start_magic;
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extern const int end_magic;
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extern int receive_message(int fd, struct md_message *msg, int tmo);
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extern int send_message(int fd, struct md_message *msg, int tmo);
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extern int ack(int fd, int seq, int tmo);
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extern int nack(int fd, int err, int tmo);
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extern int connect_monitor(char *devname);
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extern int ping_monitor(char *devname);
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