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Diffstat (limited to 'xlators/features/changelog/src/changelog-misc.h')
| -rw-r--r-- | xlators/features/changelog/src/changelog-misc.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/xlators/features/changelog/src/changelog-misc.h b/xlators/features/changelog/src/changelog-misc.h new file mode 100644 index 00000000000..e2addc09414 --- /dev/null +++ b/xlators/features/changelog/src/changelog-misc.h @@ -0,0 +1,131 @@ +/* + Copyright (c) 2013 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. +*/ + +#ifndef _CHANGELOG_MISC_H +#define _CHANGELOG_MISC_H + +#include <glusterfs/glusterfs.h> +#include <glusterfs/common-utils.h> + +#define CHANGELOG_MAX_TYPE 4 +#define CHANGELOG_FILE_NAME "CHANGELOG" +#define HTIME_FILE_NAME "HTIME" +#define CSNAP_FILE_NAME "CHANGELOG.SNAP" +#define HTIME_KEY "trusted.glusterfs.htime" +#define HTIME_CURRENT "trusted.glusterfs.current_htime" +#define HTIME_INITIAL_VALUE "0:0" + +#define CHANGELOG_VERSION_MAJOR 1 +#define CHANGELOG_VERSION_MINOR 2 + +#define CHANGELOG_UNIX_SOCK DEFAULT_VAR_RUN_DIRECTORY "/changelog-%s.sock" +#define CHANGELOG_TMP_UNIX_SOCK DEFAULT_VAR_RUN_DIRECTORY "/.%s%lu.sock" + +/** + * header starts with the version and the format of the changelog. + * 'version' not much of a use now. + */ +#define CHANGELOG_HEADER \ + "GlusterFS Changelog | version: v%d.%d | encoding : %d\n" + +#define CHANGELOG_MAKE_SOCKET_PATH(brick_path, sockpath, len) \ + do { \ + char xxh64[GF_XXH64_DIGEST_LENGTH * 2 + 1] = { \ + 0, \ + }; \ + gf_xxh64_wrapper((unsigned char *)brick_path, strlen(brick_path), \ + GF_XXHSUM64_DEFAULT_SEED, xxh64); \ + (void)snprintf(sockpath, len, CHANGELOG_UNIX_SOCK, xxh64); \ + } while (0) + +#define CHANGELOG_MAKE_TMP_SOCKET_PATH(brick_path, sockpath, len) \ + do { \ + unsigned long pid = 0; \ + char xxh64[GF_XXH64_DIGEST_LENGTH * 2 + 1] = { \ + 0, \ + }; \ + pid = (unsigned long)getpid(); \ + gf_xxh64_wrapper((unsigned char *)brick_path, strlen(brick_path), \ + GF_XXHSUM64_DEFAULT_SEED, xxh64); \ + (void)snprintf(sockpath, len, CHANGELOG_TMP_UNIX_SOCK, xxh64, pid); \ + } while (0) + +/** + * ... used by libgfchangelog. + */ +#define CHANGELOG_GET_HEADER_INFO(fd, buffer, len, enc, maj, min, elen) \ + do { \ + FILE *fp; \ + int fd_dup; \ + \ + enc = -1; \ + maj = -1; \ + min = -1; \ + fd_dup = dup(fd); \ + \ + if (fd_dup != -1) { \ + fp = fdopen(fd_dup, "r"); \ + if (fp) { \ + if (fgets(buffer, len, fp)) { \ + elen = strlen(buffer); \ + sscanf(buffer, CHANGELOG_HEADER, &maj, &min, &enc); \ + } \ + fclose(fp); \ + } else { \ + sys_close(fd_dup); \ + } \ + } \ + } while (0) + +#define CHANGELOG_FILL_HTIME_DIR(changelog_dir, path) \ + do { \ + snprintf(path, sizeof(path), "%s/htime", changelog_dir); \ + } while (0) + +#define CHANGELOG_FILL_CSNAP_DIR(changelog_dir, path) \ + do { \ + snprintf(path, sizeof(path), "%s/csnap", changelog_dir); \ + } while (0) +/** + * everything after 'CHANGELOG_TYPE_METADATA_XATTR' are internal types + * (ie. none of the fops trigger this type of event), hence + * CHANGELOG_MAX_TYPE = 4 + */ +typedef enum { + CHANGELOG_TYPE_DATA = 0, + CHANGELOG_TYPE_METADATA, + CHANGELOG_TYPE_ENTRY, + CHANGELOG_TYPE_METADATA_XATTR, + CHANGELOG_TYPE_ROLLOVER, + CHANGELOG_TYPE_FSYNC, +} changelog_log_type; + +/* operation modes - RT for now */ +typedef enum { + CHANGELOG_MODE_RT = 0, +} changelog_mode_t; + +/* encoder types */ + +typedef enum { + CHANGELOG_ENCODE_MIN = 0, + CHANGELOG_ENCODE_BINARY, + CHANGELOG_ENCODE_ASCII, + CHANGELOG_ENCODE_MAX, +} changelog_encoder_t; + +#define CHANGELOG_VALID_ENCODING(enc) \ + (enc > CHANGELOG_ENCODE_MIN && enc < CHANGELOG_ENCODE_MAX) + +#define CHANGELOG_TYPE_IS_ENTRY(type) (type == CHANGELOG_TYPE_ENTRY) +#define CHANGELOG_TYPE_IS_ROLLOVER(type) (type == CHANGELOG_TYPE_ROLLOVER) +#define CHANGELOG_TYPE_IS_FSYNC(type) (type == CHANGELOG_TYPE_FSYNC) + +#endif /* _CHANGELOG_MISC_H */ |