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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.
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
#ifndef __FS_CEPH_PAGELIST_H
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#define __FS_CEPH_PAGELIST_H
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#include <asm/byteorder.h>
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#include <linux/atomic.h>
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#include <linux/list.h>
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#include <linux/types.h>
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struct ceph_pagelist {
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struct list_head head;
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void *mapped_tail;
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size_t length;
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size_t room;
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struct list_head free_list;
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size_t num_pages_free;
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atomic_t refcnt;
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};
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struct ceph_pagelist_cursor {
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struct ceph_pagelist *pl; /* pagelist, for error checking */
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struct list_head *page_lru; /* page in list */
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size_t room; /* room remaining to reset to */
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};
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static inline void ceph_pagelist_init(struct ceph_pagelist *pl)
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{
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INIT_LIST_HEAD(&pl->head);
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pl->mapped_tail = NULL;
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pl->length = 0;
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pl->room = 0;
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INIT_LIST_HEAD(&pl->free_list);
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pl->num_pages_free = 0;
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atomic_set(&pl->refcnt, 1);
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}
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extern void ceph_pagelist_release(struct ceph_pagelist *pl);
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extern int ceph_pagelist_append(struct ceph_pagelist *pl, const void *d, size_t l);
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extern int ceph_pagelist_reserve(struct ceph_pagelist *pl, size_t space);
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extern int ceph_pagelist_free_reserve(struct ceph_pagelist *pl);
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extern void ceph_pagelist_set_cursor(struct ceph_pagelist *pl,
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struct ceph_pagelist_cursor *c);
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extern int ceph_pagelist_truncate(struct ceph_pagelist *pl,
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struct ceph_pagelist_cursor *c);
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static inline int ceph_pagelist_encode_64(struct ceph_pagelist *pl, u64 v)
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{
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__le64 ev = cpu_to_le64(v);
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return ceph_pagelist_append(pl, &ev, sizeof(ev));
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}
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static inline int ceph_pagelist_encode_32(struct ceph_pagelist *pl, u32 v)
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{
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__le32 ev = cpu_to_le32(v);
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return ceph_pagelist_append(pl, &ev, sizeof(ev));
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}
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static inline int ceph_pagelist_encode_16(struct ceph_pagelist *pl, u16 v)
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{
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__le16 ev = cpu_to_le16(v);
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return ceph_pagelist_append(pl, &ev, sizeof(ev));
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}
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static inline int ceph_pagelist_encode_8(struct ceph_pagelist *pl, u8 v)
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{
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return ceph_pagelist_append(pl, &v, 1);
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}
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static inline int ceph_pagelist_encode_string(struct ceph_pagelist *pl,
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char *s, size_t len)
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{
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int ret = ceph_pagelist_encode_32(pl, len);
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if (ret)
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return ret;
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if (len)
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return ceph_pagelist_append(pl, s, len);
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return 0;
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}
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#endif
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