| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _FS_CEPH_MSGPOOL |
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| 3 | #define _FS_CEPH_MSGPOOL |
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| 4 | |
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| 5 | #include <linux/mempool.h> |
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| 6 | |
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| 7 | /* |
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| 8 | * we use memory pools for preallocating messages we may receive, to |
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| 9 | * avoid unexpected OOM conditions. |
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| 10 | */ |
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| 11 | struct ceph_msgpool { |
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| 12 | const char *name; |
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| 13 | mempool_t *pool; |
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| 14 | int type; /* preallocated message type */ |
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| 15 | int front_len; /* preallocated payload size */ |
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| 16 | int max_data_items; |
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| 17 | }; |
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| 18 | |
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| 19 | int ceph_msgpool_init(struct ceph_msgpool *pool, int type, |
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| 20 | int front_len, int max_data_items, int size, |
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| 21 | const char *name); |
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| 22 | extern void ceph_msgpool_destroy(struct ceph_msgpool *pool); |
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| 23 | struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, int front_len, |
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| 24 | int max_data_items); |
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| 25 | extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *); |
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| 26 | |
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| 27 | #endif |
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| 28 | |
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