linux/include/linux/ceph/string_table.h at master · flexbed/linux · GitHub

History

63 lines (55 loc) · 1.3 KB

Raw

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _FS_CEPH_STRING_TABLE_H

#define _FS_CEPH_STRING_TABLE_H

#include <linux/types.h>

#include <linux/kref.h>

#include <linux/rbtree.h>

#include <linux/rcupdate.h>

struct ceph_string {

struct kref kref;

union {

struct rb_node node;

struct rcu_head rcu;

};

size_t len;

char str[];

};

extern void ceph_release_string(struct kref *ref);

extern struct ceph_string *ceph_find_or_create_string(const char *str,

size_t len);

extern bool ceph_strings_empty(void);

static inline struct ceph_string *ceph_get_string(struct ceph_string *str)

{

kref_get(&str->kref);

return str;

}

static inline void ceph_put_string(struct ceph_string *str)

{

if (!str)

return;

kref_put(&str->kref, ceph_release_string);

}

static inline int ceph_compare_string(struct ceph_string *cs,

const char* str, size_t len)

{

size_t cs_len = cs ? cs->len : 0;

if (cs_len != len)

return cs_len - len;

if (len == 0)

return 0;

return strncmp(cs->str, str, len);

}

#define ceph_try_get_string(x) \

({ \

struct ceph_string *___str; \

rcu_read_lock(); \

for (;;) { \

___str = rcu_dereference(x); \

if (!___str || \

kref_get_unless_zero(&___str->kref)) \

break; \

} \

rcu_read_unlock(); \

(___str); \

})

#endif

linux/include/linux/ceph/string_table.h at master · flexbed/linux · GitHub

Expand file tree

Breadcrumbs

string_table.h

Latest commit

History

Breadcrumbs

string_table.h

File metadata and controls