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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2022 Paulo Alcantara <palcantara@suse.de>
*/
#ifndef _CIFS_DFS_H
#define _CIFS_DFS_H
#include "cifsglob.h"
#include "fs_context.h"
#include "cifs_unicode.h"
struct dfs_root_ses {
struct list_head list;
struct cifs_ses *ses;
};
int dfs_parse_target_referral(const char *full_path, const struct dfs_info3_param *ref,
struct smb3_fs_context *ctx);
int dfs_mount_share(struct cifs_mount_ctx *mnt_ctx, bool *isdfs);
static inline char *dfs_get_path(struct cifs_sb_info *cifs_sb, const char *path)
{
return dfs_cache_canonical_path(path, cifs_sb->local_nls, cifs_remap(cifs_sb));
}
static inline int dfs_get_referral(struct cifs_mount_ctx *mnt_ctx, const char *path,
struct dfs_info3_param *ref, struct dfs_cache_tgt_list *tl)
{
struct smb3_fs_context *ctx = mnt_ctx->fs_ctx;
struct cifs_sb_info *cifs_sb = mnt_ctx->cifs_sb;
return dfs_cache_find(mnt_ctx->xid, ctx->dfs_root_ses, cifs_sb->local_nls,
cifs_remap(cifs_sb), path, ref, tl);
}
/* Return DFS full path out of a dentry set for automount */
static inline char *dfs_get_automount_devname(struct dentry *dentry, void *page)
{
struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
size_t len;
char *s;
spin_lock(&tcon->tc_lock);
if (unlikely(!tcon->origin_fullpath)) {
spin_unlock(&tcon->tc_lock);
return ERR_PTR(-EREMOTE);
}
spin_unlock(&tcon->tc_lock);
s = dentry_path_raw(dentry, page, PATH_MAX);
if (IS_ERR(s))
return s;
/* for root, we want "" */
if (!s[1])
s++;
spin_lock(&tcon->tc_lock);
len = strlen(tcon->origin_fullpath);
if (s < (char *)page + len) {
spin_unlock(&tcon->tc_lock);
return ERR_PTR(-ENAMETOOLONG);
}
s -= len;
memcpy(s, tcon->origin_fullpath, len);
spin_unlock(&tcon->tc_lock);
convert_delimiter(s, '/');
return s;
}
static inline void dfs_put_root_smb_sessions(struct list_head *head)
{
struct dfs_root_ses *root, *tmp;
list_for_each_entry_safe(root, tmp, head, list) {
list_del_init(&root->list);
cifs_put_smb_ses(root->ses);
kfree(root);
}
}
#endif /* _CIFS_DFS_H */
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