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/*
Copyright (c) 2017 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#include <stdio.h>
#include <libgen.h>
#include <glusterfs/common-utils.h>
#include <glusterfs/syscall.h>
#define MAX_GFID2PATH_LINK_SUP 500
#define GFID_SIZE 16
#define GFID_XATTR_KEY "trusted.gfid"
int
main(int argc, char **argv)
{
int ret = 0;
struct stat st;
char *dname = NULL;
char *bname = NULL;
ssize_t ret_size = 0;
uuid_t pgfid_raw = {
0,
};
char pgfid[36] = "";
char xxh64[GF_XXH64_DIGEST_LENGTH * 2 + 1] = {
0,
};
char pgfid_bname[1024] = {
0,
};
char *key = NULL;
char *val = NULL;
size_t key_size = 0;
size_t val_size = 0;
const char *file_path = NULL;
char *file_path1 = NULL;
char *file_path2 = NULL;
if (argc != 2) {
fprintf(stderr, "Usage: setgfid2path <file-path>\n");
return -1;
}
ret = sys_lstat(argv[1], &st);
if (ret != 0) {
fprintf(stderr, "Invalid File Path\n");
return -1;
}
if (st.st_nlink >= MAX_GFID2PATH_LINK_SUP) {
fprintf(stderr,
"Number of Hardlink support exceeded. "
"max=%d\n",
MAX_GFID2PATH_LINK_SUP);
return -1;
}
file_path = argv[1];
file_path1 = strdup(file_path);
file_path2 = strdup(file_path);
dname = dirname(file_path1);
bname = basename(file_path2);
/* Get GFID of Parent directory */
ret_size = sys_lgetxattr(dname, GFID_XATTR_KEY, pgfid_raw, GFID_SIZE);
if (ret_size != GFID_SIZE) {
fprintf(stderr, "Failed to get GFID of parent directory. dir=%s\n",
dname);
ret = -1;
goto out;
}
/* Convert to UUID format */
if (uuid_utoa_r(pgfid_raw, pgfid) == NULL) {
fprintf(stderr,
"Failed to format GFID of parent directory. "
"dir=%s GFID=%s\n",
dname, pgfid_raw);
ret = -1;
goto out;
}
/* Find xxhash for PGFID/BaseName */
snprintf(pgfid_bname, sizeof(pgfid_bname), "%s/%s", pgfid, bname);
gf_xxh64_wrapper((unsigned char *)pgfid_bname, strlen(pgfid_bname),
GF_XXHSUM64_DEFAULT_SEED, xxh64);
key_size = SLEN(GFID2PATH_XATTR_KEY_PREFIX) + GF_XXH64_DIGEST_LENGTH * 2 +
1;
key = alloca(key_size);
snprintf(key, key_size, GFID2PATH_XATTR_KEY_PREFIX "%s", xxh64);
val_size = UUID_CANONICAL_FORM_LEN + NAME_MAX + 2;
val = alloca(val_size);
snprintf(val, val_size, "%s/%s", pgfid, bname);
/* Set the Xattr, ignore if same key xattr already exists */
ret = sys_lsetxattr(file_path, key, val, strlen(val), XATTR_CREATE);
if (ret == -1) {
if (errno == EEXIST) {
printf("Xattr already exists, ignoring..\n");
ret = 0;
goto out;
}
fprintf(stderr, "Failed to set gfid2path xattr. errno=%d\n error=%s",
errno, strerror(errno));
ret = -1;
goto out;
}
printf("Success. file=%s key=%s value=%s\n", file_path, key, val);
out:
if (file_path1 != NULL)
free(file_path1);
if (file_path2 != NULL)
free(file_path2);
return ret;
}
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