Started implementing the backing system
This commit is contained in:
parent
0aa2cfbfa8
commit
051b95484c
62
src/backing.c
Normal file
62
src/backing.c
Normal file
@ -0,0 +1,62 @@
|
||||
#include "backing.h"
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
bool IsBackingIdentifierValid(const char* backing_identifier) {
|
||||
if (backing_identifier == NULL)
|
||||
return false;
|
||||
|
||||
// Check that the identifier is not empty or too long
|
||||
size_t length = strlen(backing_identifier);
|
||||
if (length == 0 || length > 64)
|
||||
return false;
|
||||
|
||||
// Check that the identifier does not contain any slashes
|
||||
for (size_t i = 0; i < length; i++)
|
||||
if (backing_identifier[i] == '/')
|
||||
return false;
|
||||
|
||||
// Check that the identifier is not "." or ".."
|
||||
if (strcmp(backing_identifier, ".") == 0 || strcmp(backing_identifier, "..") == 0)
|
||||
return false;
|
||||
|
||||
// Check that the identifier starts with a number
|
||||
if (backing_identifier[0] >= '0' && backing_identifier[0] <= '9')
|
||||
return false;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
int GetBackingIndex(const char* backing_identifier) {
|
||||
// Check that the identifier is valid
|
||||
if (!IsBackingIdentifierValid(backing_identifier))
|
||||
return -1;
|
||||
|
||||
// Get the index
|
||||
return atoi(backing_identifier);
|
||||
}
|
||||
|
||||
Status GetBackingPoolPath(char** _backing_pool_path) {
|
||||
return Format(_backing_pool_path, "/var/lib/sandbox/backings");
|
||||
}
|
||||
|
||||
Status GetBackingDiskPath(const char* backing_identifier, char** _backing_path) {
|
||||
// Check that the identifier is valid, as it will be used in a path
|
||||
if (!IsBackingIdentifierValid(backing_identifier)) {
|
||||
Log(LOG_LEVEL_ERROR, "Invalid backing identifier '%s'.", backing_identifier);
|
||||
return FAILURE;
|
||||
}
|
||||
|
||||
// Get the backing pool path
|
||||
char* backing_pool_path = NULL;
|
||||
Status status = GetBackingPoolPath(&backing_pool_path);
|
||||
if (status != SUCCESS)
|
||||
return status;
|
||||
|
||||
// Format the backing path
|
||||
status = Format(_backing_path, "%s/%s", backing_pool_path, backing_identifier);
|
||||
free(backing_pool_path);
|
||||
|
||||
return status;
|
||||
}
|
9
src/backing.h
Normal file
9
src/backing.h
Normal file
@ -0,0 +1,9 @@
|
||||
#pragma once
|
||||
|
||||
#include "utils.h"
|
||||
|
||||
bool IsBackingIdentifierValid(const char* backing_identifier);
|
||||
int GetBackingIndex(const char* backing_identifier);
|
||||
|
||||
Status GetBackingPoolPath(char** _backing_pool_path);
|
||||
Status GetBackingDiskPath(const char* backing_identifier, char** _backing_path);
|
Loading…
Reference in New Issue
Block a user