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https://github.com/ceph/ceph
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dc48f25847
git-svn-id: https://ceph.svn.sf.net/svnroot/ceph@2100 29311d96-e01e-0410-9327-a35deaab8ce9
47 lines
1.9 KiB
C
47 lines
1.9 KiB
C
#ifndef _FS_CEPH_MDSMAP_H
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#define _FS_CEPH_MDSMAP_H
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#include <linux/ceph_fs.h>
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/* see mds/MDSMap.h */
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#define CEPH_MDS_STATE_DNE 0 /* down, never existed. */
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#define CEPH_MDS_STATE_STOPPED -1 /* down, once existed, but no subtrees. empty log. */
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#define CEPH_MDS_STATE_FAILED 2 /* down, active subtrees needs to be recovered. */
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#define CEPH_MDS_STATE_BOOT -3 /* up, boot announcement. destiny unknown. */
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#define CEPH_MDS_STATE_STANDBY -4 /* up, idle. waiting for assignment by monitor. */
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#define CEPH_MDS_STATE_CREATING -5 /* up, creating MDS instance (new journal, idalloc..). */
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#define CEPH_MDS_STATE_STARTING -6 /* up, starting prior stopped MDS instance. */
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#define CEPH_MDS_STATE_REPLAY 7 /* up, starting prior failed instance. scanning journal. */
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#define CEPH_MDS_STATE_RESOLVE 8 /* up, disambiguating distributed operations (import, rename, etc.) */
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#define CEPH_MDS_STATE_RECONNECT 9 /* up, reconnect to clients */
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#define CEPH_MDS_STATE_REJOIN 10 /* up, replayed journal, rejoining distributed cache */
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#define CEPH_MDS_STATE_ACTIVE 11 /* up, active */
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#define CEPH_MDS_STATE_STOPPING 12 /* up, exporting metadata (-> standby or out) */
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/*
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* mds map
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*
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* fields limited to those the client cares about
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*/
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struct ceph_mdsmap {
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__u64 m_epoch, m_client_epoch;
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struct ceph_timeval m_created;
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__u32 m_anchortable;
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__u32 m_root;
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__u32 m_max_mds; /* size of m_addr, m_state arrays */
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struct ceph_entity_addr *m_addr; /* array of addresses */
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__s32 *m_state; /* array of states */
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};
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extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
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extern int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w);
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extern struct ceph_entity_addr *ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w);
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extern struct ceph_mdsmap * ceph_mdsmap_decode(void **p, void *end);
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extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);
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#endif
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