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// SPDX-License-Identifier: LGPL-2.1
/*
*
* Functions which do error mapping of SMB2 status codes to POSIX errors
*
* Copyright (C) International Business Machines Corp., 2009
* Author(s): Steve French (sfrench@us.ibm.com)
*
*/
#include <linux/errno.h>
#include "cifsproto.h"
#include "cifs_debug.h"
#include "smb2proto.h"
#include "smb2glob.h"
#include "../common/smb2status.h"
#include "trace.h"
static const struct status_to_posix_error smb2_error_map_table[] = {
/*
* Automatically generated by the `gen_smb2_mapping` script,
* sorted by NT status code (cpu-endian, ascending)
*/
#include "smb2_mapping_table.c"
};
static __always_inline int cmp_smb2_status(const void *_key, const void *_pivot)
{
__u32 key = *(__u32 *)_key;
const struct status_to_posix_error *pivot = _pivot;
if (key < pivot->smb2_status)
return -1;
if (key > pivot->smb2_status)
return 1;
return 0;
}
static const struct status_to_posix_error *smb2_get_err_map(__u32 smb2_status)
{
const struct status_to_posix_error *err_map;
err_map = __inline_bsearch(&smb2_status, smb2_error_map_table,
ARRAY_SIZE(smb2_error_map_table),
sizeof(struct status_to_posix_error),
cmp_smb2_status);
return err_map;
}
int
map_smb2_to_linux_error(char *buf, bool log_err)
{
struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
int rc = -EIO;
__le32 smb2err = shdr->Status;
const struct status_to_posix_error *err_map;
if (smb2err == 0) {
trace_smb3_cmd_done(le32_to_cpu(shdr->Id.SyncId.TreeId),
le64_to_cpu(shdr->SessionId),
le16_to_cpu(shdr->Command),
le64_to_cpu(shdr->MessageId));
return 0;
}
log_err = (log_err && (smb2err != STATUS_MORE_PROCESSING_REQUIRED) &&
(smb2err != STATUS_END_OF_FILE)) ||
(cifsFYI & CIFS_RC);
err_map = smb2_get_err_map(le32_to_cpu(smb2err));
if (!err_map)
goto out;
rc = err_map->posix_error;
if (log_err)
pr_notice("Status code returned 0x%08x %s\n",
err_map->smb2_status, err_map->status_string);
out:
/* on error mapping not found - return EIO */
cifs_dbg(FYI, "Mapping SMB2 status code 0x%08x to POSIX err %d\n",
le32_to_cpu(smb2err), rc);
trace_smb3_cmd_err(le32_to_cpu(shdr->Id.SyncId.TreeId),
le64_to_cpu(shdr->SessionId),
le16_to_cpu(shdr->Command),
le64_to_cpu(shdr->MessageId),
le32_to_cpu(smb2err), rc);
if (rc == -EIO)
smb_EIO1(smb_eio_trace_smb2_received_error, le32_to_cpu(smb2err));
return rc;
}
int __init smb2_init_maperror(void)
{
unsigned int i;
/* Check whether the array is sorted in ascending order */
for (i = 1; i < ARRAY_SIZE(smb2_error_map_table); i++) {
if (smb2_error_map_table[i].smb2_status >=
smb2_error_map_table[i - 1].smb2_status)
continue;
pr_err("smb2_error_map_table array order is incorrect\n");
return -EINVAL;
}
return 0;
}
#if IS_ENABLED(CONFIG_SMB_KUNIT_TESTS)
#define EXPORT_SYMBOL_FOR_SMB_TEST(sym) \
EXPORT_SYMBOL_FOR_MODULES(sym, "smb2maperror_test")
/* Previous prototype for eliminating the build warning. */
const struct status_to_posix_error *smb2_get_err_map_test(__u32 smb2_status);
const struct status_to_posix_error *smb2_get_err_map_test(__u32 smb2_status)
{
return smb2_get_err_map(smb2_status);
}
EXPORT_SYMBOL_FOR_SMB_TEST(smb2_get_err_map_test);
const struct status_to_posix_error *smb2_error_map_table_test = smb2_error_map_table;
EXPORT_SYMBOL_FOR_SMB_TEST(smb2_error_map_table_test);
unsigned int smb2_error_map_num = ARRAY_SIZE(smb2_error_map_table);
EXPORT_SYMBOL_FOR_SMB_TEST(smb2_error_map_num);
#endif
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