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2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
#ifndef _FS_CEPH_STRING_TABLE_H
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#define _FS_CEPH_STRING_TABLE_H
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#include <linux/types.h>
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#include <linux/kref.h>
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#include <linux/rbtree.h>
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#include <linux/rcupdate.h>
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struct ceph_string {
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struct kref kref;
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union {
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struct rb_node node;
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struct rcu_head rcu;
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};
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size_t len;
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char str[];
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};
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extern void ceph_release_string(struct kref *ref);
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extern struct ceph_string *ceph_find_or_create_string(const char *str,
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size_t len);
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extern bool ceph_strings_empty(void);
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static inline struct ceph_string *ceph_get_string(struct ceph_string *str)
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{
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kref_get(&str->kref);
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return str;
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}
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static inline void ceph_put_string(struct ceph_string *str)
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{
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if (!str)
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return;
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kref_put(&str->kref, ceph_release_string);
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}
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static inline int ceph_compare_string(struct ceph_string *cs,
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const char* str, size_t len)
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{
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size_t cs_len = cs ? cs->len : 0;
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if (cs_len != len)
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return cs_len - len;
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if (len == 0)
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return 0;
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return strncmp(cs->str, str, len);
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}
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#define ceph_try_get_string(x) \
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({ \
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struct ceph_string *___str; \
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rcu_read_lock(); \
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for (;;) { \
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___str = rcu_dereference(x); \
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if (!___str || \
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kref_get_unless_zero(&___str->kref)) \
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break; \
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} \
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rcu_read_unlock(); \
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(___str); \
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})
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#endif
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