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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/linux/ceph/mdsmap.h
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@@ -25,8 +25,9 @@
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 	u32 m_session_timeout;          /* seconds */
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 	u32 m_session_autoclose;        /* seconds */
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 	u64 m_max_file_size;
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-	u32 m_max_mds;                  /* size of m_addr, m_state arrays */
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-	int m_num_mds;
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+	u32 m_max_mds;			/* expected up:active mds number */
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+	u32 m_num_active_mds;		/* actual up:active mds number */
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+	u32 possible_max_rank;		/* possible max rank index */
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 	struct ceph_mds_info *m_info;
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 	/* which object pools file data can be stored in */
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@@ -42,7 +43,7 @@
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 static inline struct ceph_entity_addr *
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 ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w)
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 {
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-	if (w >= m->m_num_mds)
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+	if (w >= m->possible_max_rank)
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 		return NULL;
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 	return &m->m_info[w].addr;
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 }
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@@ -50,14 +51,14 @@
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 static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w)
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 {
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 	BUG_ON(w < 0);
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-	if (w >= m->m_num_mds)
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+	if (w >= m->possible_max_rank)
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 		return CEPH_MDS_STATE_DNE;
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 	return m->m_info[w].state;
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 }
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 static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w)
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 {
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-	if (w >= 0 && w < m->m_num_mds)
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+	if (w >= 0 && w < m->possible_max_rank)
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 		return m->m_info[w].laggy;
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 	return false;
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 }