@@ -163,7 +163,8 @@ struct ksmbd_share_config_response {
__u16 force_directory_mode;
__u16 force_uid;
__u16 force_gid;
- __u32 reserved[128]; /* Reserved room */
+ __s8 share_name[KSMBD_REQ_MAX_SHARE_NAME];
+ __u32 reserved[112]; /* Reserved room */
__u32 veto_list_sz;
__s8 ____payload[];
};
@@ -16,6 +16,7 @@
#include "user_config.h"
#include "user_session.h"
#include "../transport_ipc.h"
+#include "../misc.h"
#define SHARE_HASH_BITS 3
static DEFINE_HASHTABLE(shares_table, SHARE_HASH_BITS);
@@ -119,7 +120,8 @@ static int parse_veto_list(struct ksmbd_share_config *share,
return 0;
}
-static struct ksmbd_share_config *share_config_request(const char *name)
+static struct ksmbd_share_config *share_config_request(struct unicode_map *um,
+ const char *name)
{
struct ksmbd_share_config_response *resp;
struct ksmbd_share_config *share = NULL;
@@ -133,6 +135,17 @@ static struct ksmbd_share_config *share_config_request(const char *name)
if (resp->flags == KSMBD_SHARE_FLAG_INVALID)
goto out;
+ if (*resp->share_name && strcmp(resp->share_name, name)) {
+ char *cf_resp_name;
+ bool equal;
+
+ cf_resp_name = ksmbd_casefold_sharename(um, resp->share_name);
+ equal = cf_resp_name && !strcmp(cf_resp_name, name);
+ kfree(cf_resp_name);
+ if (!equal)
+ goto out;
+ }
+
share = kzalloc(sizeof(struct ksmbd_share_config), GFP_KERNEL);
if (!share)
goto out;
@@ -190,7 +203,8 @@ static struct ksmbd_share_config *share_config_request(const char *name)
return share;
}
-struct ksmbd_share_config *ksmbd_share_config_get(const char *name)
+struct ksmbd_share_config *ksmbd_share_config_get(struct unicode_map *um,
+ const char *name)
{
struct ksmbd_share_config *share;
@@ -202,7 +216,7 @@ struct ksmbd_share_config *ksmbd_share_config_get(const char *name)
if (share)
return share;
- return share_config_request(name);
+ return share_config_request(um, name);
}
bool ksmbd_share_veto_filename(struct ksmbd_share_config *share,
@@ -9,6 +9,7 @@
#include <linux/workqueue.h>
#include <linux/hashtable.h>
#include <linux/path.h>
+#include <linux/unicode.h>
struct ksmbd_share_config {
char *name;
@@ -74,7 +75,8 @@ static inline void ksmbd_share_config_put(struct ksmbd_share_config *share)
__ksmbd_share_config_put(share);
}
-struct ksmbd_share_config *ksmbd_share_config_get(const char *name);
+struct ksmbd_share_config *ksmbd_share_config_get(struct unicode_map *um,
+ const char *name);
bool ksmbd_share_veto_filename(struct ksmbd_share_config *share,
const char *filename);
#endif /* __SHARE_CONFIG_MANAGEMENT_H__ */
@@ -26,7 +26,7 @@ ksmbd_tree_conn_connect(struct ksmbd_conn *conn, struct ksmbd_session *sess,
struct sockaddr *peer_addr;
int ret;
- sc = ksmbd_share_config_get(share_name);
+ sc = ksmbd_share_config_get(conn->um, share_name);
if (!sc)
return status;
@@ -61,7 +61,7 @@ ksmbd_tree_conn_connect(struct ksmbd_conn *conn, struct ksmbd_session *sess,
struct ksmbd_share_config *new_sc;
ksmbd_share_config_del(sc);
- new_sc = ksmbd_share_config_get(share_name);
+ new_sc = ksmbd_share_config_get(conn->um, share_name);
if (!new_sc) {
pr_err("Failed to update stale share config\n");
status.ret = -ESTALE;
@@ -227,7 +227,7 @@ void ksmbd_conv_path_to_windows(char *path)
strreplace(path, '/', '\\');
}
-static char *casefold_sharename(struct unicode_map *um, const char *name)
+char *ksmbd_casefold_sharename(struct unicode_map *um, const char *name)
{
char *cf_name;
int cf_len;
@@ -273,7 +273,7 @@ char *ksmbd_extract_sharename(struct unicode_map *um, const char *treename)
name = (pos + 1);
/* caller has to free the memory */
- return casefold_sharename(um, name);
+ return ksmbd_casefold_sharename(um, name);
}
/**
@@ -20,6 +20,7 @@ int get_nlink(struct kstat *st);
void ksmbd_conv_path_to_unix(char *path);
void ksmbd_strip_last_slash(char *path);
void ksmbd_conv_path_to_windows(char *path);
+char *ksmbd_casefold_sharename(struct unicode_map *um, const char *name);
char *ksmbd_extract_sharename(struct unicode_map *um, const char *treename);
char *convert_to_unix_name(struct ksmbd_share_config *share, const char *name);
Share config response may contain the share name without casefolding as it is known to the user space daemon. When it is present, compare it to the share name the share config request was made with. If they differ, casefold it and compare again. If they still differ, we have a share config which is incompatible with the way we do share config caching. Currently, this is the case if CONFIG_UNICODE is not set, the share name contains non-ASCII characters, and those non-ASCII characters do not match those in the share name known to user space. In other words, when CONFIG_UNICODE is not set, UTF-8 share names now work but are only case-insensitive in the ASCII range. Signed-off-by: Atte Heikkilä <atteh.mailbox@gmail.com> --- fs/ksmbd/ksmbd_netlink.h | 3 ++- fs/ksmbd/mgmt/share_config.c | 20 +++++++++++++++++--- fs/ksmbd/mgmt/share_config.h | 4 +++- fs/ksmbd/mgmt/tree_connect.c | 4 ++-- fs/ksmbd/misc.c | 4 ++-- fs/ksmbd/misc.h | 1 + 6 files changed, 27 insertions(+), 9 deletions(-)