From 1ae254ddcf397b101d291342272e13af25b0b1a1 Mon Sep 17 00:00:00 2001 From: Aravinda VK Date: Thu, 20 Jul 2017 17:08:12 +0530 Subject: tools/setgfid2path: Tool to set GFID to Path xattr in brick backend Once storage/gfid2path feature is enabled using `gluster volume set storage.gfid2path enable`, it starts recording the gfid2path xattr on each files. But this feature will not add xattr to the existing files. This tool accepts the file path as argument and sets the necessary xattr required for this feature. Change-Id: I75ad82c86ce482950645e687ff2e33b413fa53da Updates: #139 Signed-off-by: Aravinda VK Reviewed-on: https://review.gluster.org/17839 Smoke: Gluster Build System Reviewed-by: Niels de Vos Reviewed-by: Kotresh HR Tested-by: Kotresh HR CentOS-regression: Gluster Build System --- tools/setgfid2path/src/main.c | 128 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 128 insertions(+) create mode 100644 tools/setgfid2path/src/main.c (limited to 'tools/setgfid2path/src/main.c') diff --git a/tools/setgfid2path/src/main.c b/tools/setgfid2path/src/main.c new file mode 100644 index 00000000000..07d7a48b15d --- /dev/null +++ b/tools/setgfid2path/src/main.c @@ -0,0 +1,128 @@ +/* + Copyright (c) 2017 Red Hat, Inc. + 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 +#include + +#include "common-utils.h" +#include "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 \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 = strlen(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; +} -- cgit