354 lines
7.2 KiB
C
354 lines
7.2 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
|
||
|
|
* Copyright (C) 2018 Samsung Electronics Co., Ltd.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/xattr.h>
|
||
|
|
#include <linux/fs.h>
|
||
|
|
|
||
|
|
#include "misc.h"
|
||
|
|
#include "smb_common.h"
|
||
|
|
#include "connection.h"
|
||
|
|
#include "vfs.h"
|
||
|
|
|
||
|
|
#include "mgmt/share_config.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* match_pattern() - compare a string with a pattern which might include
|
||
|
|
* wildcard '*' and '?'
|
||
|
|
* TODO : implement consideration about DOS_DOT, DOS_QM and DOS_STAR
|
||
|
|
*
|
||
|
|
* @string: string to compare with a pattern
|
||
|
|
* @len: string length
|
||
|
|
* @pattern: pattern string which might include wildcard '*' and '?'
|
||
|
|
*
|
||
|
|
* Return: 0 if pattern matched with the string, otherwise non zero value
|
||
|
|
*/
|
||
|
|
int match_pattern(const char *str, size_t len, const char *pattern)
|
||
|
|
{
|
||
|
|
const char *s = str;
|
||
|
|
const char *p = pattern;
|
||
|
|
bool star = false;
|
||
|
|
|
||
|
|
while (*s && len) {
|
||
|
|
switch (*p) {
|
||
|
|
case '?':
|
||
|
|
s++;
|
||
|
|
len--;
|
||
|
|
p++;
|
||
|
|
break;
|
||
|
|
case '*':
|
||
|
|
star = true;
|
||
|
|
str = s;
|
||
|
|
if (!*++p)
|
||
|
|
return true;
|
||
|
|
pattern = p;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if (tolower(*s) == tolower(*p)) {
|
||
|
|
s++;
|
||
|
|
len--;
|
||
|
|
p++;
|
||
|
|
} else {
|
||
|
|
if (!star)
|
||
|
|
return false;
|
||
|
|
str++;
|
||
|
|
s = str;
|
||
|
|
p = pattern;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (*p == '*')
|
||
|
|
++p;
|
||
|
|
return !*p;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* is_char_allowed() - check for valid character
|
||
|
|
* @ch: input character to be checked
|
||
|
|
*
|
||
|
|
* Return: 1 if char is allowed, otherwise 0
|
||
|
|
*/
|
||
|
|
static inline int is_char_allowed(char ch)
|
||
|
|
{
|
||
|
|
/* check for control chars, wildcards etc. */
|
||
|
|
if (!(ch & 0x80) &&
|
||
|
|
(ch <= 0x1f ||
|
||
|
|
ch == '?' || ch == '"' || ch == '<' ||
|
||
|
|
ch == '>' || ch == '|' || ch == '*'))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ksmbd_validate_filename(char *filename)
|
||
|
|
{
|
||
|
|
while (*filename) {
|
||
|
|
char c = *filename;
|
||
|
|
|
||
|
|
filename++;
|
||
|
|
if (!is_char_allowed(c)) {
|
||
|
|
ksmbd_debug(VFS, "File name validation failed: 0x%x\n", c);
|
||
|
|
return -ENOENT;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ksmbd_validate_stream_name(char *stream_name)
|
||
|
|
{
|
||
|
|
while (*stream_name) {
|
||
|
|
char c = *stream_name;
|
||
|
|
|
||
|
|
stream_name++;
|
||
|
|
if (c == '/' || c == ':' || c == '\\') {
|
||
|
|
pr_err("Stream name validation failed: %c\n", c);
|
||
|
|
return -ENOENT;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int parse_stream_name(char *filename, char **stream_name, int *s_type)
|
||
|
|
{
|
||
|
|
char *stream_type;
|
||
|
|
char *s_name;
|
||
|
|
int rc = 0;
|
||
|
|
|
||
|
|
s_name = filename;
|
||
|
|
filename = strsep(&s_name, ":");
|
||
|
|
ksmbd_debug(SMB, "filename : %s, streams : %s\n", filename, s_name);
|
||
|
|
if (strchr(s_name, ':')) {
|
||
|
|
stream_type = s_name;
|
||
|
|
s_name = strsep(&stream_type, ":");
|
||
|
|
|
||
|
|
rc = ksmbd_validate_stream_name(s_name);
|
||
|
|
if (rc < 0) {
|
||
|
|
rc = -ENOENT;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
ksmbd_debug(SMB, "stream name : %s, stream type : %s\n", s_name,
|
||
|
|
stream_type);
|
||
|
|
if (!strncasecmp("$data", stream_type, 5))
|
||
|
|
*s_type = DATA_STREAM;
|
||
|
|
else if (!strncasecmp("$index_allocation", stream_type, 17))
|
||
|
|
*s_type = DIR_STREAM;
|
||
|
|
else
|
||
|
|
rc = -ENOENT;
|
||
|
|
}
|
||
|
|
|
||
|
|
*stream_name = s_name;
|
||
|
|
out:
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* convert_to_nt_pathname() - extract and return windows path string
|
||
|
|
* whose share directory prefix was removed from file path
|
||
|
|
* @filename : unix filename
|
||
|
|
* @sharepath: share path string
|
||
|
|
*
|
||
|
|
* Return : windows path string or error
|
||
|
|
*/
|
||
|
|
|
||
|
|
char *convert_to_nt_pathname(struct ksmbd_share_config *share,
|
||
|
|
struct path *path)
|
||
|
|
{
|
||
|
|
char *pathname, *ab_pathname, *nt_pathname;
|
||
|
|
int share_path_len = share->path_sz;
|
||
|
|
|
||
|
|
pathname = kmalloc(PATH_MAX, GFP_KERNEL);
|
||
|
|
if (!pathname)
|
||
|
|
return ERR_PTR(-EACCES);
|
||
|
|
|
||
|
|
ab_pathname = d_path(path, pathname, PATH_MAX);
|
||
|
|
if (IS_ERR(ab_pathname)) {
|
||
|
|
nt_pathname = ERR_PTR(-EACCES);
|
||
|
|
goto free_pathname;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (strncmp(ab_pathname, share->path, share_path_len)) {
|
||
|
|
nt_pathname = ERR_PTR(-EACCES);
|
||
|
|
goto free_pathname;
|
||
|
|
}
|
||
|
|
|
||
|
|
nt_pathname = kzalloc(strlen(&ab_pathname[share_path_len]) + 2, GFP_KERNEL);
|
||
|
|
if (!nt_pathname) {
|
||
|
|
nt_pathname = ERR_PTR(-ENOMEM);
|
||
|
|
goto free_pathname;
|
||
|
|
}
|
||
|
|
if (ab_pathname[share_path_len] == '\0')
|
||
|
|
strcpy(nt_pathname, "/");
|
||
|
|
strcat(nt_pathname, &ab_pathname[share_path_len]);
|
||
|
|
|
||
|
|
ksmbd_conv_path_to_windows(nt_pathname);
|
||
|
|
|
||
|
|
free_pathname:
|
||
|
|
kfree(pathname);
|
||
|
|
return nt_pathname;
|
||
|
|
}
|
||
|
|
|
||
|
|
int get_nlink(struct kstat *st)
|
||
|
|
{
|
||
|
|
int nlink;
|
||
|
|
|
||
|
|
nlink = st->nlink;
|
||
|
|
if (S_ISDIR(st->mode))
|
||
|
|
nlink--;
|
||
|
|
|
||
|
|
return nlink;
|
||
|
|
}
|
||
|
|
|
||
|
|
void ksmbd_conv_path_to_unix(char *path)
|
||
|
|
{
|
||
|
|
strreplace(path, '\\', '/');
|
||
|
|
}
|
||
|
|
|
||
|
|
void ksmbd_strip_last_slash(char *path)
|
||
|
|
{
|
||
|
|
int len = strlen(path);
|
||
|
|
|
||
|
|
while (len && path[len - 1] == '/') {
|
||
|
|
path[len - 1] = '\0';
|
||
|
|
len--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void ksmbd_conv_path_to_windows(char *path)
|
||
|
|
{
|
||
|
|
strreplace(path, '/', '\\');
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ksmbd_extract_sharename() - get share name from tree connect request
|
||
|
|
* @treename: buffer containing tree name and share name
|
||
|
|
*
|
||
|
|
* Return: share name on success, otherwise error
|
||
|
|
*/
|
||
|
|
char *ksmbd_extract_sharename(char *treename)
|
||
|
|
{
|
||
|
|
char *name = treename;
|
||
|
|
char *dst;
|
||
|
|
char *pos = strrchr(name, '\\');
|
||
|
|
|
||
|
|
if (pos)
|
||
|
|
name = (pos + 1);
|
||
|
|
|
||
|
|
/* caller has to free the memory */
|
||
|
|
dst = kstrdup(name, GFP_KERNEL);
|
||
|
|
if (!dst)
|
||
|
|
return ERR_PTR(-ENOMEM);
|
||
|
|
return dst;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* convert_to_unix_name() - convert windows name to unix format
|
||
|
|
* @path: name to be converted
|
||
|
|
* @tid: tree id of mathing share
|
||
|
|
*
|
||
|
|
* Return: converted name on success, otherwise NULL
|
||
|
|
*/
|
||
|
|
char *convert_to_unix_name(struct ksmbd_share_config *share, const char *name)
|
||
|
|
{
|
||
|
|
int no_slash = 0, name_len, path_len;
|
||
|
|
char *new_name;
|
||
|
|
|
||
|
|
if (name[0] == '/')
|
||
|
|
name++;
|
||
|
|
|
||
|
|
path_len = share->path_sz;
|
||
|
|
name_len = strlen(name);
|
||
|
|
new_name = kmalloc(path_len + name_len + 2, GFP_KERNEL);
|
||
|
|
if (!new_name)
|
||
|
|
return new_name;
|
||
|
|
|
||
|
|
memcpy(new_name, share->path, path_len);
|
||
|
|
if (new_name[path_len - 1] != '/') {
|
||
|
|
new_name[path_len] = '/';
|
||
|
|
no_slash = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
memcpy(new_name + path_len + no_slash, name, name_len);
|
||
|
|
path_len += name_len + no_slash;
|
||
|
|
new_name[path_len] = 0x00;
|
||
|
|
return new_name;
|
||
|
|
}
|
||
|
|
|
||
|
|
char *ksmbd_convert_dir_info_name(struct ksmbd_dir_info *d_info,
|
||
|
|
const struct nls_table *local_nls,
|
||
|
|
int *conv_len)
|
||
|
|
{
|
||
|
|
char *conv;
|
||
|
|
int sz = min(4 * d_info->name_len, PATH_MAX);
|
||
|
|
|
||
|
|
if (!sz)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
conv = kmalloc(sz, GFP_KERNEL);
|
||
|
|
if (!conv)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
/* XXX */
|
||
|
|
*conv_len = smbConvertToUTF16((__le16 *)conv, d_info->name,
|
||
|
|
d_info->name_len, local_nls, 0);
|
||
|
|
*conv_len *= 2;
|
||
|
|
|
||
|
|
/* We allocate buffer twice bigger than needed. */
|
||
|
|
conv[*conv_len] = 0x00;
|
||
|
|
conv[*conv_len + 1] = 0x00;
|
||
|
|
return conv;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Convert the NT UTC (based 1601-01-01, in hundred nanosecond units)
|
||
|
|
* into Unix UTC (based 1970-01-01, in seconds).
|
||
|
|
*/
|
||
|
|
struct timespec64 ksmbd_NTtimeToUnix(__le64 ntutc)
|
||
|
|
{
|
||
|
|
struct timespec64 ts;
|
||
|
|
|
||
|
|
/* Subtract the NTFS time offset, then convert to 1s intervals. */
|
||
|
|
s64 t = le64_to_cpu(ntutc) - NTFS_TIME_OFFSET;
|
||
|
|
u64 abs_t;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Unfortunately can not use normal 64 bit division on 32 bit arch, but
|
||
|
|
* the alternative, do_div, does not work with negative numbers so have
|
||
|
|
* to special case them
|
||
|
|
*/
|
||
|
|
if (t < 0) {
|
||
|
|
abs_t = -t;
|
||
|
|
ts.tv_nsec = do_div(abs_t, 10000000) * 100;
|
||
|
|
ts.tv_nsec = -ts.tv_nsec;
|
||
|
|
ts.tv_sec = -abs_t;
|
||
|
|
} else {
|
||
|
|
abs_t = t;
|
||
|
|
ts.tv_nsec = do_div(abs_t, 10000000) * 100;
|
||
|
|
ts.tv_sec = abs_t;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ts;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Convert the Unix UTC into NT UTC. */
|
||
|
|
inline u64 ksmbd_UnixTimeToNT(struct timespec64 t)
|
||
|
|
{
|
||
|
|
/* Convert to 100ns intervals and then add the NTFS time offset. */
|
||
|
|
return (u64)t.tv_sec * 10000000 + t.tv_nsec / 100 + NTFS_TIME_OFFSET;
|
||
|
|
}
|
||
|
|
|
||
|
|
inline long long ksmbd_systime(void)
|
||
|
|
{
|
||
|
|
struct timespec64 ts;
|
||
|
|
|
||
|
|
ktime_get_real_ts64(&ts);
|
||
|
|
return ksmbd_UnixTimeToNT(ts);
|
||
|
|
}
|