313a4a82f1
It is currently possible to remove a device and re-add it without the manager noticing, i.e. without detecting a mdstat->devcnt container->devcnt mismatch. Introduce ping_manager() to arrange for mdmon to run manage_container() prior to mdadm dropping the exclusive open() on the container. Despite these precautions sysfs_read() may still fail. If this happens invalidate container->devcnt to ensure manage_container() runs at the next event. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
33 lines
1.1 KiB
C
33 lines
1.1 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 metadata_update;
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extern int receive_message(int fd, struct metadata_update *msg, int tmo);
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extern int send_message(int fd, struct metadata_update *msg, int tmo);
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extern int ack(int fd, int tmo);
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extern int wait_reply(int fd, 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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extern int ping_manager(char *devname);
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#define MSG_MAX_LEN (4*1024*1024)
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