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path: root/fs/smb/server/smb_common.c
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Diffstat (limited to 'fs/smb/server/smb_common.c')
-rw-r--r--fs/smb/server/smb_common.c101
1 files changed, 63 insertions, 38 deletions
diff --git a/fs/smb/server/smb_common.c b/fs/smb/server/smb_common.c
index c2b75d898852..b23203a1c286 100644
--- a/fs/smb/server/smb_common.c
+++ b/fs/smb/server/smb_common.c
@@ -9,7 +9,7 @@
#include "smb_common.h"
#include "server.h"
#include "misc.h"
-#include "smbstatus.h"
+#include "../common/smb2status.h"
#include "connection.h"
#include "ksmbd_work.h"
#include "mgmt/user_session.h"
@@ -18,8 +18,8 @@
#include "mgmt/share_config.h"
/*for shortname implementation */
-static const char basechars[43] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_-!@#$%";
-#define MANGLE_BASE (sizeof(basechars) / sizeof(char) - 1)
+static const char *basechars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_-!@#$%";
+#define MANGLE_BASE (strlen(basechars) - 1)
#define MAGIC_CHAR '~'
#define PERIOD '.'
#define mangle(V) ((char)(basechars[(V) % MANGLE_BASE]))
@@ -158,8 +158,12 @@ int ksmbd_verify_smb_message(struct ksmbd_work *work)
*/
bool ksmbd_smb_request(struct ksmbd_conn *conn)
{
- __le32 *proto = (__le32 *)smb2_get_msg(conn->request_buf);
+ __le32 *proto;
+ if (conn->request_buf[0] != 0)
+ return false;
+
+ proto = (__le32 *)smb2_get_msg(conn->request_buf);
if (*proto == SMB2_COMPRESSION_TRANSFORM_ID) {
pr_err_ratelimited("smb2 compression not support yet");
return false;
@@ -319,12 +323,6 @@ static int init_smb1_rsp_hdr(struct ksmbd_work *work)
struct smb_hdr *rsp_hdr = (struct smb_hdr *)work->response_buf;
struct smb_hdr *rcv_hdr = (struct smb_hdr *)work->request_buf;
- /*
- * Remove 4 byte direct TCP header.
- */
- *(__be32 *)work->response_buf =
- cpu_to_be32(sizeof(struct smb_hdr) - 4);
-
rsp_hdr->Command = SMB_COM_NEGOTIATE;
*(__le32 *)rsp_hdr->Protocol = SMB1_PROTO_NUMBER;
rsp_hdr->Flags = SMBFLG_RESPONSE;
@@ -360,7 +358,7 @@ static int smb1_check_user_session(struct ksmbd_work *work)
static int smb1_allocate_rsp_buf(struct ksmbd_work *work)
{
work->response_buf = kzalloc(MAX_CIFS_SMALL_BUFFER_SIZE,
- GFP_KERNEL);
+ KSMBD_DEFAULT_GFP);
work->response_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
if (!work->response_buf) {
@@ -372,11 +370,26 @@ static int smb1_allocate_rsp_buf(struct ksmbd_work *work)
return 0;
}
+/**
+ * set_smb1_rsp_status() - set error type in smb response header
+ * @work: smb work containing smb response header
+ * @err: error code to set in response
+ */
+static void set_smb1_rsp_status(struct ksmbd_work *work, __le32 err)
+{
+ work->send_no_response = 1;
+}
+
static struct smb_version_ops smb1_server_ops = {
.get_cmd_val = get_smb1_cmd_val,
.init_rsp_hdr = init_smb1_rsp_hdr,
.allocate_rsp_buf = smb1_allocate_rsp_buf,
.check_user_session = smb1_check_user_session,
+ .set_rsp_status = set_smb1_rsp_status,
+};
+
+static struct smb_version_values smb1_server_values = {
+ .max_credits = SMB2_MAX_CREDITS,
};
static int smb1_negotiate(struct ksmbd_work *work)
@@ -390,18 +403,18 @@ static struct smb_version_cmds smb1_server_cmds[1] = {
static int init_smb1_server(struct ksmbd_conn *conn)
{
+ conn->vals = &smb1_server_values;
conn->ops = &smb1_server_ops;
conn->cmds = smb1_server_cmds;
conn->max_cmds = ARRAY_SIZE(smb1_server_cmds);
return 0;
}
-int ksmbd_init_smb_server(struct ksmbd_work *work)
+int ksmbd_init_smb_server(struct ksmbd_conn *conn)
{
- struct ksmbd_conn *conn = work->conn;
__le32 proto;
- proto = *(__le32 *)((struct smb_hdr *)work->request_buf)->Protocol;
+ proto = *(__le32 *)((struct smb_hdr *)conn->request_buf)->Protocol;
if (conn->need_neg == false) {
if (proto == SMB1_PROTO_NUMBER)
return -EINVAL;
@@ -448,10 +461,13 @@ int ksmbd_populate_dot_dotdot_entries(struct ksmbd_work *work, int info_level,
}
ksmbd_kstat.kstat = &kstat;
- ksmbd_vfs_fill_dentry_attrs(work,
- idmap,
- dentry,
- &ksmbd_kstat);
+ rc = ksmbd_vfs_fill_dentry_attrs(work,
+ idmap,
+ dentry,
+ &ksmbd_kstat);
+ if (rc)
+ break;
+
rc = fn(conn, info_level, d_info, &ksmbd_kstat);
if (rc)
break;
@@ -476,7 +492,7 @@ int ksmbd_populate_dot_dotdot_entries(struct ksmbd_work *work, int info_level,
* @shortname: destination short filename
*
* Return: shortname length or 0 when source long name is '.' or '..'
- * TODO: Though this function comforms the restriction of 8.3 Filename spec,
+ * TODO: Though this function conforms the restriction of 8.3 Filename spec,
* but the result is different with Windows 7's one. need to check.
*/
int ksmbd_extract_shortname(struct ksmbd_conn *conn, const char *longname,
@@ -499,7 +515,7 @@ int ksmbd_extract_shortname(struct ksmbd_conn *conn, const char *longname,
p = strrchr(longname, '.');
if (p == longname) { /*name starts with a dot*/
- strscpy(extension, "___", strlen("___"));
+ strscpy(extension, "___", sizeof(extension));
} else {
if (p) {
p++;
@@ -560,10 +576,11 @@ static int smb_handle_negotiate(struct ksmbd_work *work)
ksmbd_debug(SMB, "Unsupported SMB1 protocol\n");
- /* Add 2 byte bcc and 2 byte DialectIndex. */
- inc_rfc1001_len(work->response_buf, 4);
- neg_rsp->hdr.Status.CifsError = STATUS_SUCCESS;
+ if (ksmbd_iov_pin_rsp(work, (void *)neg_rsp + 4,
+ sizeof(struct smb_negotiate_rsp) - 4))
+ return -ENOMEM;
+ neg_rsp->hdr.Status.CifsError = STATUS_SUCCESS;
neg_rsp->hdr.WordCount = 1;
neg_rsp->DialectIndex = cpu_to_le16(work->conn->dialect);
neg_rsp->ByteCount = 0;
@@ -633,7 +650,7 @@ int ksmbd_smb_check_shared_mode(struct file *filp, struct ksmbd_file *curr_fp)
* Lookup fp in master fp list, and check desired access and
* shared mode between previous open and current open.
*/
- read_lock(&curr_fp->f_ci->m_lock);
+ down_read(&curr_fp->f_ci->m_lock);
list_for_each_entry(prev_fp, &curr_fp->f_ci->m_fp_list, node) {
if (file_inode(filp) != file_inode(prev_fp->filp))
continue;
@@ -709,7 +726,7 @@ int ksmbd_smb_check_shared_mode(struct file *filp, struct ksmbd_file *curr_fp)
break;
}
}
- read_unlock(&curr_fp->f_ci->m_lock);
+ up_read(&curr_fp->f_ci->m_lock);
return rc;
}
@@ -719,17 +736,19 @@ bool is_asterisk(char *p)
return p && p[0] == '*';
}
-int ksmbd_override_fsids(struct ksmbd_work *work)
+int __ksmbd_override_fsids(struct ksmbd_work *work,
+ struct ksmbd_share_config *share)
{
struct ksmbd_session *sess = work->sess;
- struct ksmbd_share_config *share = work->tcon->share_conf;
+ struct ksmbd_user *user = sess->user;
struct cred *cred;
struct group_info *gi;
unsigned int uid;
unsigned int gid;
+ int i;
- uid = user_uid(sess->user);
- gid = user_gid(sess->user);
+ uid = user_uid(user);
+ gid = user_gid(user);
if (share->force_uid != KSMBD_SHARE_INVALID_UID)
uid = share->force_uid;
if (share->force_gid != KSMBD_SHARE_INVALID_GID)
@@ -742,11 +761,18 @@ int ksmbd_override_fsids(struct ksmbd_work *work)
cred->fsuid = make_kuid(&init_user_ns, uid);
cred->fsgid = make_kgid(&init_user_ns, gid);
- gi = groups_alloc(0);
+ gi = groups_alloc(user->ngroups);
if (!gi) {
abort_creds(cred);
return -ENOMEM;
}
+
+ for (i = 0; i < user->ngroups; i++)
+ gi->gid[i] = make_kgid(&init_user_ns, user->sgid[i]);
+
+ if (user->ngroups)
+ groups_sort(gi);
+
set_groups(cred, gi);
put_group_info(gi);
@@ -755,23 +781,22 @@ int ksmbd_override_fsids(struct ksmbd_work *work)
WARN_ON(work->saved_cred);
work->saved_cred = override_creds(cred);
- if (!work->saved_cred) {
- abort_creds(cred);
- return -EINVAL;
- }
return 0;
}
+int ksmbd_override_fsids(struct ksmbd_work *work)
+{
+ return __ksmbd_override_fsids(work, work->tcon->share_conf);
+}
+
void ksmbd_revert_fsids(struct ksmbd_work *work)
{
const struct cred *cred;
-
WARN_ON(!work->saved_cred);
- cred = current_cred();
- revert_creds(work->saved_cred);
- put_cred(cred);
+ cred = revert_creds(work->saved_cred);
work->saved_cred = NULL;
+ put_cred(cred);
}
__le32 smb_map_generic_desired_access(__le32 daccess)
generated by cgit (git 2.34.1) at 2025-12-25 03:34:52 +0000