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c7e337d649
Helper for decoding into a ceph_buffer, and other misc decoding helpers we will need. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
40 lines
818 B
C
40 lines
818 B
C
#ifndef __FS_CEPH_BUFFER_H
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#define __FS_CEPH_BUFFER_H
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#include <linux/kref.h>
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#include <linux/mm.h>
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#include <linux/vmalloc.h>
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#include <linux/types.h>
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#include <linux/uio.h>
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/*
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* a simple reference counted buffer.
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*
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* use kmalloc for small sizes (<= one page), vmalloc for larger
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* sizes.
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*/
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struct ceph_buffer {
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struct kref kref;
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struct kvec vec;
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size_t alloc_len;
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bool is_vmalloc;
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};
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extern struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp);
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extern void ceph_buffer_release(struct kref *kref);
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static inline struct ceph_buffer *ceph_buffer_get(struct ceph_buffer *b)
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{
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kref_get(&b->kref);
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return b;
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}
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static inline void ceph_buffer_put(struct ceph_buffer *b)
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{
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kref_put(&b->kref, ceph_buffer_release);
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}
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extern int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end);
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#endif
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