cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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pagelist.h (1971B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __FS_CEPH_PAGELIST_H
      3#define __FS_CEPH_PAGELIST_H
      4
      5#include <asm/byteorder.h>
      6#include <linux/refcount.h>
      7#include <linux/list.h>
      8#include <linux/types.h>
      9
     10struct ceph_pagelist {
     11	struct list_head head;
     12	void *mapped_tail;
     13	size_t length;
     14	size_t room;
     15	struct list_head free_list;
     16	size_t num_pages_free;
     17	refcount_t refcnt;
     18};
     19
     20struct ceph_pagelist_cursor {
     21	struct ceph_pagelist *pl;   /* pagelist, for error checking */
     22	struct list_head *page_lru; /* page in list */
     23	size_t room;		    /* room remaining to reset to */
     24};
     25
     26struct ceph_pagelist *ceph_pagelist_alloc(gfp_t gfp_flags);
     27
     28extern void ceph_pagelist_release(struct ceph_pagelist *pl);
     29
     30extern int ceph_pagelist_append(struct ceph_pagelist *pl, const void *d, size_t l);
     31
     32extern int ceph_pagelist_reserve(struct ceph_pagelist *pl, size_t space);
     33
     34extern int ceph_pagelist_free_reserve(struct ceph_pagelist *pl);
     35
     36extern void ceph_pagelist_set_cursor(struct ceph_pagelist *pl,
     37				     struct ceph_pagelist_cursor *c);
     38
     39extern int ceph_pagelist_truncate(struct ceph_pagelist *pl,
     40				  struct ceph_pagelist_cursor *c);
     41
     42static inline int ceph_pagelist_encode_64(struct ceph_pagelist *pl, u64 v)
     43{
     44	__le64 ev = cpu_to_le64(v);
     45	return ceph_pagelist_append(pl, &ev, sizeof(ev));
     46}
     47static inline int ceph_pagelist_encode_32(struct ceph_pagelist *pl, u32 v)
     48{
     49	__le32 ev = cpu_to_le32(v);
     50	return ceph_pagelist_append(pl, &ev, sizeof(ev));
     51}
     52static inline int ceph_pagelist_encode_16(struct ceph_pagelist *pl, u16 v)
     53{
     54	__le16 ev = cpu_to_le16(v);
     55	return ceph_pagelist_append(pl, &ev, sizeof(ev));
     56}
     57static inline int ceph_pagelist_encode_8(struct ceph_pagelist *pl, u8 v)
     58{
     59	return ceph_pagelist_append(pl, &v, 1);
     60}
     61static inline int ceph_pagelist_encode_string(struct ceph_pagelist *pl,
     62					      char *s, u32 len)
     63{
     64	int ret = ceph_pagelist_encode_32(pl, len);
     65	if (ret)
     66		return ret;
     67	if (len)
     68		return ceph_pagelist_append(pl, s, len);
     69	return 0;
     70}
     71
     72#endif