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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dfs_cache.h (2923B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * DFS referral cache routines
      4 *
      5 * Copyright (c) 2018-2019 Paulo Alcantara <palcantara@suse.de>
      6 */
      7
      8#ifndef _CIFS_DFS_CACHE_H
      9#define _CIFS_DFS_CACHE_H
     10
     11#include <linux/nls.h>
     12#include <linux/list.h>
     13#include <linux/uuid.h>
     14#include "cifsglob.h"
     15
     16#define DFS_CACHE_TGT_LIST_INIT(var) { .tl_numtgts = 0, .tl_list = LIST_HEAD_INIT((var).tl_list), }
     17
     18struct dfs_cache_tgt_list {
     19	int tl_numtgts;
     20	struct list_head tl_list;
     21};
     22
     23struct dfs_cache_tgt_iterator {
     24	char *it_name;
     25	int it_path_consumed;
     26	struct list_head it_list;
     27};
     28
     29int dfs_cache_init(void);
     30void dfs_cache_destroy(void);
     31extern const struct proc_ops dfscache_proc_ops;
     32
     33int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses, const struct nls_table *cp,
     34		   int remap, const char *path, struct dfs_info3_param *ref,
     35		   struct dfs_cache_tgt_list *tgt_list);
     36int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref,
     37			 struct dfs_cache_tgt_list *tgt_list);
     38int dfs_cache_update_tgthint(const unsigned int xid, struct cifs_ses *ses,
     39			     const struct nls_table *cp, int remap, const char *path,
     40			     const struct dfs_cache_tgt_iterator *it);
     41int dfs_cache_noreq_update_tgthint(const char *path, const struct dfs_cache_tgt_iterator *it);
     42int dfs_cache_get_tgt_referral(const char *path, const struct dfs_cache_tgt_iterator *it,
     43			       struct dfs_info3_param *ref);
     44int dfs_cache_get_tgt_share(char *path, const struct dfs_cache_tgt_iterator *it, char **share,
     45			    char **prefix);
     46void dfs_cache_put_refsrv_sessions(const uuid_t *mount_id);
     47void dfs_cache_add_refsrv_session(const uuid_t *mount_id, struct cifs_ses *ses);
     48char *dfs_cache_canonical_path(const char *path, const struct nls_table *cp, int remap);
     49int dfs_cache_remount_fs(struct cifs_sb_info *cifs_sb);
     50
     51static inline struct dfs_cache_tgt_iterator *
     52dfs_cache_get_next_tgt(struct dfs_cache_tgt_list *tl,
     53		       struct dfs_cache_tgt_iterator *it)
     54{
     55	if (!tl || list_empty(&tl->tl_list) || !it ||
     56	    list_is_last(&it->it_list, &tl->tl_list))
     57		return NULL;
     58	return list_next_entry(it, it_list);
     59}
     60
     61static inline struct dfs_cache_tgt_iterator *
     62dfs_cache_get_tgt_iterator(struct dfs_cache_tgt_list *tl)
     63{
     64	if (!tl)
     65		return NULL;
     66	return list_first_entry_or_null(&tl->tl_list,
     67					struct dfs_cache_tgt_iterator,
     68					it_list);
     69}
     70
     71static inline void dfs_cache_free_tgts(struct dfs_cache_tgt_list *tl)
     72{
     73	struct dfs_cache_tgt_iterator *it, *nit;
     74
     75	if (!tl || list_empty(&tl->tl_list))
     76		return;
     77	list_for_each_entry_safe(it, nit, &tl->tl_list, it_list) {
     78		list_del(&it->it_list);
     79		kfree(it->it_name);
     80		kfree(it);
     81	}
     82	tl->tl_numtgts = 0;
     83}
     84
     85static inline const char *
     86dfs_cache_get_tgt_name(const struct dfs_cache_tgt_iterator *it)
     87{
     88	return it ? it->it_name : NULL;
     89}
     90
     91static inline int
     92dfs_cache_get_nr_tgts(const struct dfs_cache_tgt_list *tl)
     93{
     94	return tl ? tl->tl_numtgts : 0;
     95}
     96
     97#endif /* _CIFS_DFS_CACHE_H */