106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* DFS referral cache routines
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*
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* Copyright (c) 2018-2019 Paulo Alcantara <palcantara@suse.de>
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*/
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#ifndef _CIFS_DFS_CACHE_H
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#define _CIFS_DFS_CACHE_H
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#include <linux/nls.h>
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#include <linux/list.h>
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#include <linux/uuid.h>
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#include "cifsglob.h"
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extern struct workqueue_struct *dfscache_wq;
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extern atomic_t dfs_cache_ttl;
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#define DFS_CACHE_TGT_LIST_INIT(var) \
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{ .tl_numtgts = 0, .tl_list = LIST_HEAD_INIT((var).tl_list), }
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#define DFS_CACHE_TGT_LIST(var) \
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struct dfs_cache_tgt_list var = DFS_CACHE_TGT_LIST_INIT(var)
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struct dfs_cache_tgt_list {
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int tl_numtgts;
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struct list_head tl_list;
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};
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struct dfs_cache_tgt_iterator {
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char *it_name;
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int it_path_consumed;
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struct list_head it_list;
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};
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int dfs_cache_init(void);
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void dfs_cache_destroy(void);
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extern const struct proc_ops dfscache_proc_ops;
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int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses, const struct nls_table *cp,
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int remap, const char *path, struct dfs_info3_param *ref,
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struct dfs_cache_tgt_list *tgt_list);
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int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref,
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struct dfs_cache_tgt_list *tgt_list);
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void dfs_cache_noreq_update_tgthint(const char *path, const struct dfs_cache_tgt_iterator *it);
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int dfs_cache_get_tgt_referral(const char *path, const struct dfs_cache_tgt_iterator *it,
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struct dfs_info3_param *ref);
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int dfs_cache_get_tgt_share(char *path, const struct dfs_cache_tgt_iterator *it, char **share,
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char **prefix);
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char *dfs_cache_canonical_path(const char *path, const struct nls_table *cp, int remap);
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int dfs_cache_remount_fs(struct cifs_sb_info *cifs_sb);
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void dfs_cache_refresh(struct work_struct *work);
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static inline struct dfs_cache_tgt_iterator *
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dfs_cache_get_next_tgt(struct dfs_cache_tgt_list *tl,
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struct dfs_cache_tgt_iterator *it)
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{
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if (!tl || !tl->tl_numtgts || list_empty(&tl->tl_list) ||
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!it || list_is_last(&it->it_list, &tl->tl_list))
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return NULL;
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return list_next_entry(it, it_list);
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}
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static inline struct dfs_cache_tgt_iterator *
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dfs_cache_get_tgt_iterator(struct dfs_cache_tgt_list *tl)
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{
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if (!tl)
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return NULL;
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return list_first_entry_or_null(&tl->tl_list,
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struct dfs_cache_tgt_iterator,
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it_list);
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}
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static inline void dfs_cache_free_tgts(struct dfs_cache_tgt_list *tl)
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{
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struct dfs_cache_tgt_iterator *it, *nit;
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if (!tl || !tl->tl_numtgts || list_empty(&tl->tl_list))
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return;
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list_for_each_entry_safe(it, nit, &tl->tl_list, it_list) {
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list_del(&it->it_list);
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kfree(it->it_name);
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kfree(it);
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}
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tl->tl_numtgts = 0;
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}
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static inline const char *
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dfs_cache_get_tgt_name(const struct dfs_cache_tgt_iterator *it)
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{
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return it ? it->it_name : NULL;
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}
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static inline int
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dfs_cache_get_nr_tgts(const struct dfs_cache_tgt_list *tl)
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{
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return tl ? tl->tl_numtgts : 0;
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}
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static inline int dfs_cache_get_ttl(void)
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{
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return atomic_read(&dfs_cache_ttl);
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}
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#endif /* _CIFS_DFS_CACHE_H */
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