fs/smb/client/dfs_cache.h

Source file repositories/reference/linux-study-clean/fs/smb/client/dfs_cache.h

File Facts

System
Linux kernel
Corpus path
fs/smb/client/dfs_cache.h
Extension
.h
Size
2982 bytes
Lines
111
Domain
Core OS
Bucket
VFS And Filesystem Core
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct dfs_cache_tgt_list {
	int tl_numtgts;
	struct list_head tl_list;
};

struct dfs_cache_tgt_iterator {
	char *it_name;
	int it_path_consumed;
	struct list_head it_list;
};

int dfs_cache_init(void);
void dfs_cache_destroy(void);
extern const struct proc_ops dfscache_proc_ops;

int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses,
		   const struct nls_table *cp, int remap, const char *path,
		   struct dfs_info3_param *ref,
		   struct dfs_cache_tgt_list *tgt_list);
int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref,
			 struct dfs_cache_tgt_list *tgt_list);
void dfs_cache_noreq_update_tgthint(const char *path,
				    const struct dfs_cache_tgt_iterator *it);
int dfs_cache_get_tgt_referral(const char *path,
			       const struct dfs_cache_tgt_iterator *it,
			       struct dfs_info3_param *ref);
int dfs_cache_get_tgt_share(char *path,
			    const struct dfs_cache_tgt_iterator *it,
			    char **share, char **prefix);
char *dfs_cache_canonical_path(const char *path, const struct nls_table *cp,
			       int remap);
int dfs_cache_remount_fs(struct cifs_sb_info *cifs_sb);
void dfs_cache_refresh(struct work_struct *work);

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 || !tl->tl_numtgts || 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 || !tl->tl_numtgts || 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;
}

static inline int dfs_cache_get_ttl(void)
{
	return atomic_read(&dfs_cache_ttl);
}

#endif /* _CIFS_DFS_CACHE_H */

Annotation

Implementation Notes