/* SPDX-License-Identifier: GPL-2.0 */ /* * DFS referral cache routines * * Copyright (c) 2018-2019 Paulo Alcantara <palcantara@suse.de> */ #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; struct list_head it_list; }; extern int dfs_cache_init(void); extern void dfs_cache_destroy(void); extern const struct file_operations dfscache_proc_fops; 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); extern int dfs_cache_add_vol(char *mntdata, struct smb_vol *vol, const char *fullpath); extern int dfs_cache_update_vol(const char *fullpath, struct TCP_Server_Info *server); extern void dfs_cache_del_vol(const char *fullpath); 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 */