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