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fs/cifs/dfs_cache.h 2.8 KB
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54be1f6c1   Paulo Alcantara   cifs: Add DFS cac... 
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  /* SPDX-License-Identifier: GPL-2.0 */
  /*
   * DFS referral cache routines
   *
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   * Copyright (c) 2018-2019 Paulo Alcantara <palcantara@suse.de>
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   */
  
  #ifndef _CIFS_DFS_CACHE_H
  #define _CIFS_DFS_CACHE_H
  
  #include <linux/nls.h>
  #include <linux/list.h>
  #include "cifsglob.h"
  
  struct dfs_cache_tgt_list {
  	int tl_numtgts;
  	struct list_head tl_list;
  };
  
  struct dfs_cache_tgt_iterator {
  	char *it_name;
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  	int it_path_consumed;
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  	struct list_head it_list;
  };
  
  extern int dfs_cache_init(void);
  extern void dfs_cache_destroy(void);
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  extern const struct proc_ops dfscache_proc_ops;
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  extern int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses,
  			  const struct nls_table *nls_codepage, int remap,
  			  const char *path, struct dfs_info3_param *ref,
  			  struct dfs_cache_tgt_list *tgt_list);
  extern int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref,
  				struct dfs_cache_tgt_list *tgt_list);
  extern int dfs_cache_update_tgthint(const unsigned int xid,
  				    struct cifs_ses *ses,
  				    const struct nls_table *nls_codepage,
  				    int remap, const char *path,
  				    const struct dfs_cache_tgt_iterator *it);
  extern int
  dfs_cache_noreq_update_tgthint(const char *path,
  			       const struct dfs_cache_tgt_iterator *it);
  extern int dfs_cache_get_tgt_referral(const char *path,
  				      const struct dfs_cache_tgt_iterator *it,
  				      struct dfs_info3_param *ref);
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  extern int dfs_cache_add_vol(char *mntdata, struct smb_vol *vol,
  			const char *fullpath);
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  extern int dfs_cache_update_vol(const char *fullpath,
  				struct TCP_Server_Info *server);
  extern void dfs_cache_del_vol(const char *fullpath);
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  extern int dfs_cache_get_tgt_share(char *path, const struct dfs_cache_tgt_iterator *it,
  				   char **share, char **prefix);
bacd704a9   Paulo Alcantara (SUSE)   cifs: handle pref... 
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54be1f6c1
 
 Paulo Alcantara
 
cifs: Add DFS cac...




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  static inline struct dfs_cache_tgt_iterator *
  dfs_cache_get_next_tgt(struct dfs_cache_tgt_list *tl,
  		       struct dfs_cache_tgt_iterator *it)
  {
  	if (!tl || list_empty(&tl->tl_list) || !it ||
  	    list_is_last(&it->it_list, &tl->tl_list))
  		return NULL;
  	return list_next_entry(it, it_list);
  }
  
  static inline struct dfs_cache_tgt_iterator *
  dfs_cache_get_tgt_iterator(struct dfs_cache_tgt_list *tl)
  {
  	if (!tl)
  		return NULL;
  	return list_first_entry_or_null(&tl->tl_list,
  					struct dfs_cache_tgt_iterator,
  					it_list);
  }
  
  static inline void dfs_cache_free_tgts(struct dfs_cache_tgt_list *tl)
  {
  	struct dfs_cache_tgt_iterator *it, *nit;
  
  	if (!tl || list_empty(&tl->tl_list))
  		return;
  	list_for_each_entry_safe(it, nit, &tl->tl_list, it_list) {
  		list_del(&it->it_list);
  		kfree(it->it_name);
  		kfree(it);
  	}
  	tl->tl_numtgts = 0;
  }
  
  static inline const char *
  dfs_cache_get_tgt_name(const struct dfs_cache_tgt_iterator *it)
  {
  	return it ? it->it_name : NULL;
  }
  
  static inline int
  dfs_cache_get_nr_tgts(const struct dfs_cache_tgt_list *tl)
  {
  	return tl ? tl->tl_numtgts : 0;
  }
  
  #endif /* _CIFS_DFS_CACHE_H */