safefs/SFSFuse.c at master · safecloud-project/safefs · GitHub

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/*
  SafeFS
  (c) 2016 2016 INESC TEC. Written by J. Paulo and R. Pontes

*/


#include <stdio.h>
#include <stdlib.h>

#include "SFSFuse.h"
#include "utils.h"

int compose_layers(struct fuse_operations** operations, configuration config) {
    DEBUG_MSG("Going to compose layers\n");

    GSList* current = config.layers;
    do {
        // DEBUG_MSG("Going to read layer number %p\n", current);

        int layer = GPOINTER_TO_INT(current->data);
        DEBUG_MSG("Going to init driver %d\n", layer);

        switch (layer) {
            case BLOCK_ALIGN:
                init_align_driver(operations, config);
                break;
            case SFUSE:
                init_sfuse_driver(operations, config);
                break;
            case MULTI_LOOPBACK:
                init_multi_loopback_driver(operations, config);
                break;
            case NOPFUSE:
                init_nop_layer(operations, config);
                break;
            default:
                return 1;
        }
        current = current->next;

    } while (current != NULL);

    return 0;
}

int clean_layers(configuration config) {
    DEBUG_MSG("Going to clean layers\n");

    GSList* current = config.layers;
    do {
        int layer = GPOINTER_TO_INT(current->data);
        DEBUG_MSG("Going to clean drivers %d\n", layer);

        switch (layer) {
            case BLOCK_ALIGN:
                clean_align_driver(config);
                break;
            case SFUSE:
                clean_sfuse_driver(config);
                break;
            case MULTI_LOOPBACK:
                clean_multi_loopback_driver(config);
                break;
            case NOPFUSE:
                clean_nop_layer(config);
                break;
            default:
                return 1;
        }
        current = current->next;

    } while (current != NULL);
    return 0;
}

int main(int argc, char* argv[]) {
    char* local_file_path = LOCAL_SDSCONFIG_PATH;
    char* default_file_path = DEFAULT_SDSCONFIG_PATH;
    int res;
    configuration* config = NULL;
    LOG_INIT();
    DEBUG_MSG("Trying to load local configuration file %s\n", local_file_path);
    if (file_exists(local_file_path)) {
        res = init_config(local_file_path, &config);
        DEBUG_MSG("Local configuration file successfully loaded\n");
    } else if (file_exists(default_file_path)) {
        DEBUG_MSG("Could not find local configuration file (%s)\n", local_file_path);
        DEBUG_MSG("Trying to load default configuration file (%s)\n", default_file_path);

        res = init_config(default_file_path, &config);
    } else {
        DEBUG_MSG("Could not find default configuration file (%s)\n", default_file_path);
        DEBUG_MSG("Will now exit\n");
        exit(EXIT_FAILURE);
    }

    struct fuse_operations* operations;
    DEBUG_MSG("Configuration structure is setup\n");

    compose_layers(&operations, *config);

    struct fuse_args args = FUSE_ARGS_INIT(0, NULL);
    int i;
    for (i = 0; i < argc; i++) {
        fuse_opt_add_arg(&args, argv[i]);
    }
    fuse_opt_add_arg(&args, "-omodules=subdir,subdir=/");

    fuse_main(args.argc, args.argv, operations, NULL);
    DEBUG_MSG("Going to clean layers\n");

    clean_layers(*config);
    res = clean_config(config);
    LOG_EXIT();
    return res;
}