diff options
Diffstat (limited to 'xlators/features/changelog/lib/src/gf-changelog-journal-handler.c')
| -rw-r--r-- | xlators/features/changelog/lib/src/gf-changelog-journal-handler.c | 1029 |
1 files changed, 1029 insertions, 0 deletions
diff --git a/xlators/features/changelog/lib/src/gf-changelog-journal-handler.c b/xlators/features/changelog/lib/src/gf-changelog-journal-handler.c new file mode 100644 index 00000000000..7f6e2329e71 --- /dev/null +++ b/xlators/features/changelog/lib/src/gf-changelog-journal-handler.c @@ -0,0 +1,1029 @@ +/* + Copyright (c) 2015 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 <glusterfs/compat-uuid.h> +#include <glusterfs/globals.h> +#include <glusterfs/glusterfs.h> +#include <glusterfs/syscall.h> +#include <glusterfs/compat-errno.h> + +#include "gf-changelog-helpers.h" + +/* from the changelog translator */ +#include "changelog-misc.h" +#include "changelog-mem-types.h" + +#include "gf-changelog-journal.h" +#include "changelog-lib-messages.h" + +extern int byebye; + +enum changelog_versions { VERSION_1_1 = 0, VERSION_1_2 = 1 }; + +/** + * number of gfid records after fop number + */ +int nr_gfids[2][GF_FOP_MAXVALUE] = {{ + [GF_FOP_MKNOD] = 1, + [GF_FOP_MKDIR] = 1, + [GF_FOP_UNLINK] = 1, + [GF_FOP_RMDIR] = 1, + [GF_FOP_SYMLINK] = 1, + [GF_FOP_RENAME] = 2, + [GF_FOP_LINK] = 1, + [GF_FOP_CREATE] = 1, + }, + { + [GF_FOP_MKNOD] = 1, + [GF_FOP_MKDIR] = 1, + [GF_FOP_UNLINK] = 2, + [GF_FOP_RMDIR] = 2, + [GF_FOP_SYMLINK] = 1, + [GF_FOP_RENAME] = 2, + [GF_FOP_LINK] = 1, + [GF_FOP_CREATE] = 1, + }}; + +int nr_extra_recs[2][GF_FOP_MAXVALUE] = {{ + [GF_FOP_MKNOD] = 3, + [GF_FOP_MKDIR] = 3, + [GF_FOP_UNLINK] = 0, + [GF_FOP_RMDIR] = 0, + [GF_FOP_SYMLINK] = 0, + [GF_FOP_RENAME] = 0, + [GF_FOP_LINK] = 0, + [GF_FOP_CREATE] = 3, + }, + { + [GF_FOP_MKNOD] = 3, + [GF_FOP_MKDIR] = 3, + [GF_FOP_UNLINK] = 0, + [GF_FOP_RMDIR] = 0, + [GF_FOP_SYMLINK] = 0, + [GF_FOP_RENAME] = 0, + [GF_FOP_LINK] = 0, + [GF_FOP_CREATE] = 3, + }}; + +static char * +binary_to_ascii(uuid_t uuid) +{ + return uuid_utoa(uuid); +} + +static char * +conv_noop(char *ptr) +{ + return ptr; +} + +#define VERIFY_SEPARATOR(ptr, plen, perr) \ + { \ + if (*(ptr + plen) != '\0') { \ + perr = 1; \ + break; \ + } \ + } + +#define MOVER_MOVE(mover, nleft, bytes) \ + { \ + mover += bytes; \ + nleft -= bytes; \ + } + +#define PARSE_GFID(mov, ptr, le, fn, perr) \ + { \ + VERIFY_SEPARATOR(mov, le, perr); \ + ptr = fn(mov); \ + if (!ptr) { \ + perr = 1; \ + break; \ + } \ + } + +#define FILL_AND_MOVE(pt, buf, of, mo, nl, le) \ + { \ + GF_CHANGELOG_FILL_BUFFER(pt, buf, of, strlen(pt)); \ + MOVER_MOVE(mo, nl, le); \ + } + +#define PARSE_GFID_MOVE(ptr, uuid, mover, nleft, perr) \ + { \ + memcpy(uuid, mover, sizeof(uuid_t)); \ + ptr = binary_to_ascii(uuid); \ + if (!ptr) { \ + perr = 1; \ + break; \ + } \ + MOVER_MOVE(mover, nleft, sizeof(uuid_t)); \ + } + +#define LINE_BUFSIZE (3 * PATH_MAX) /* enough buffer for extra chars too */ + +/** + * using mmap() makes parsing easy. fgets() cannot be used here as + * the binary gfid could contain a line-feed (0x0A), in that case fgets() + * would read an incomplete line and parsing would fail. using POSIX fds + * would result is additional code to maintain state in case of partial + * reads of data (where multiple entries do not fit extirely in the buffer). + * + * mmap() gives the flexibility of pointing to an offset in the file + * without us worrying about reading it in memory (VM does that for us for + * free). + */ + +static int +gf_changelog_parse_binary(xlator_t *this, gf_changelog_journal_t *jnl, + int from_fd, int to_fd, size_t start_offset, + struct stat *stbuf, int version_idx) + +{ + int ret = -1; + off_t off = 0; + off_t nleft = 0; + uuid_t uuid = { + 0, + }; + char *ptr = NULL; + char *bname_start = NULL; + char *bname_end = NULL; + char *mover = NULL; + void *start = NULL; + char current_mover = ' '; + size_t blen = 0; + int parse_err = 0; + char *ascii = NULL; + + ascii = GF_CALLOC(LINE_BUFSIZE, sizeof(char), gf_common_mt_char); + + nleft = stbuf->st_size; + + start = mmap(NULL, nleft, PROT_READ, MAP_PRIVATE, from_fd, 0); + if (start == MAP_FAILED) { + gf_msg(this->name, GF_LOG_ERROR, errno, CHANGELOG_LIB_MSG_MMAP_FAILED, + "mmap() error"); + goto out; + } + + mover = start; + + MOVER_MOVE(mover, nleft, start_offset); + + while (nleft > 0) { + off = blen = 0; + ptr = bname_start = bname_end = NULL; + + current_mover = *mover; + + switch (current_mover) { + case 'D': + case 'M': + MOVER_MOVE(mover, nleft, 1); + PARSE_GFID_MOVE(ptr, uuid, mover, nleft, parse_err); + + break; + + case 'E': + MOVER_MOVE(mover, nleft, 1); + PARSE_GFID_MOVE(ptr, uuid, mover, nleft, parse_err); + + bname_start = mover; + bname_end = strchr(mover, '\n'); + if (bname_end == NULL) { + parse_err = 1; + break; + } + + blen = bname_end - bname_start; + MOVER_MOVE(mover, nleft, blen); + + break; + + default: + parse_err = 1; + } + + if (parse_err) + break; + + GF_CHANGELOG_FILL_BUFFER(¤t_mover, ascii, off, 1); + GF_CHANGELOG_FILL_BUFFER(" ", ascii, off, 1); + GF_CHANGELOG_FILL_BUFFER(ptr, ascii, off, strlen(ptr)); + if (blen) + GF_CHANGELOG_FILL_BUFFER(bname_start, ascii, off, blen); + GF_CHANGELOG_FILL_BUFFER("\n", ascii, off, 1); + + if (gf_changelog_write(to_fd, ascii, off) != off) { + gf_msg(this->name, GF_LOG_ERROR, errno, + CHANGELOG_LIB_MSG_ASCII_ERROR, + "processing binary changelog failed due to " + " error in writing ascii change"); + break; + } + + MOVER_MOVE(mover, nleft, 1); + } + + if ((nleft == 0) && (!parse_err)) + ret = 0; + + if (munmap(start, stbuf->st_size)) + gf_msg(this->name, GF_LOG_ERROR, errno, CHANGELOG_LIB_MSG_MUNMAP_FAILED, + "munmap() error"); +out: + if (ascii) + GF_FREE(ascii); + return ret; +} + +/** + * ascii decoder: + * - separate out one entry from another + * - use fop name rather than fop number + */ +static int +gf_changelog_parse_ascii(xlator_t *this, gf_changelog_journal_t *jnl, + int from_fd, int to_fd, size_t start_offset, + struct stat *stbuf, int version_idx) +{ + int ng = 0; + int ret = -1; + int fop = 0; + int len = 0; + off_t off = 0; + off_t nleft = 0; + char *ptr = NULL; + char *eptr = NULL; + void *start = NULL; + char *mover = NULL; + int parse_err = 0; + char current_mover = ' '; + char *ascii = NULL; + const char *fopname = NULL; + + ascii = GF_CALLOC(LINE_BUFSIZE, sizeof(char), gf_common_mt_char); + + nleft = stbuf->st_size; + + start = mmap(NULL, nleft, PROT_READ, MAP_PRIVATE, from_fd, 0); + if (start == MAP_FAILED) { + gf_msg(this->name, GF_LOG_ERROR, errno, CHANGELOG_LIB_MSG_MMAP_FAILED, + "mmap() error"); + goto out; + } + + mover = start; + + MOVER_MOVE(mover, nleft, start_offset); + + while (nleft > 0) { + off = 0; + current_mover = *mover; + + GF_CHANGELOG_FILL_BUFFER(¤t_mover, ascii, off, 1); + GF_CHANGELOG_FILL_BUFFER(" ", ascii, off, 1); + + switch (current_mover) { + case 'D': + MOVER_MOVE(mover, nleft, 1); + + /* target gfid */ + PARSE_GFID(mover, ptr, UUID_CANONICAL_FORM_LEN, conv_noop, + parse_err); + FILL_AND_MOVE(ptr, ascii, off, mover, nleft, + UUID_CANONICAL_FORM_LEN); + break; + case 'M': + MOVER_MOVE(mover, nleft, 1); + + /* target gfid */ + PARSE_GFID(mover, ptr, UUID_CANONICAL_FORM_LEN, conv_noop, + parse_err); + FILL_AND_MOVE(ptr, ascii, off, mover, nleft, + UUID_CANONICAL_FORM_LEN); + FILL_AND_MOVE(" ", ascii, off, mover, nleft, 1); + + /* fop */ + len = strlen(mover); + VERIFY_SEPARATOR(mover, len, parse_err); + + fop = atoi(mover); + fopname = gf_fop_list[fop]; + if (fopname == NULL) { + parse_err = 1; + break; + } + + MOVER_MOVE(mover, nleft, len); + + len = strlen(fopname); + GF_CHANGELOG_FILL_BUFFER(fopname, ascii, off, len); + + break; + + case 'E': + MOVER_MOVE(mover, nleft, 1); + + /* target gfid */ + PARSE_GFID(mover, ptr, UUID_CANONICAL_FORM_LEN, conv_noop, + parse_err); + FILL_AND_MOVE(ptr, ascii, off, mover, nleft, + UUID_CANONICAL_FORM_LEN); + FILL_AND_MOVE(" ", ascii, off, mover, nleft, 1); + + /* fop */ + len = strlen(mover); + VERIFY_SEPARATOR(mover, len, parse_err); + + fop = atoi(mover); + fopname = gf_fop_list[fop]; + if (fopname == NULL) { + parse_err = 1; + break; + } + + MOVER_MOVE(mover, nleft, len); + + len = strlen(fopname); + GF_CHANGELOG_FILL_BUFFER(fopname, ascii, off, len); + + ng = nr_extra_recs[version_idx][fop]; + for (; ng > 0; ng--) { + MOVER_MOVE(mover, nleft, 1); + len = strlen(mover); + VERIFY_SEPARATOR(mover, len, parse_err); + + GF_CHANGELOG_FILL_BUFFER(" ", ascii, off, 1); + FILL_AND_MOVE(mover, ascii, off, mover, nleft, len); + } + + /* pargfid + bname */ + ng = nr_gfids[version_idx][fop]; + while (ng-- > 0) { + MOVER_MOVE(mover, nleft, 1); + len = strlen(mover); + if (!len) { + MOVER_MOVE(mover, nleft, 1); + continue; + } + + GF_CHANGELOG_FILL_BUFFER(" ", ascii, off, 1); + + PARSE_GFID(mover, ptr, len, conv_noop, parse_err); + eptr = calloc(3, strlen(ptr)); + if (!eptr) { + parse_err = 1; + break; + } + + gf_rfc3986_encode_space_newline((unsigned char *)ptr, eptr, + jnl->rfc3986_space_newline); + FILL_AND_MOVE(eptr, ascii, off, mover, nleft, len); + free(eptr); + } + + break; + default: + parse_err = 1; + } + + if (parse_err) + break; + + GF_CHANGELOG_FILL_BUFFER("\n", ascii, off, 1); + + if (gf_changelog_write(to_fd, ascii, off) != off) { + gf_msg(this->name, GF_LOG_ERROR, errno, + CHANGELOG_LIB_MSG_ASCII_ERROR, + "processing ascii changelog failed due to " + " error in writing change"); + break; + } + + MOVER_MOVE(mover, nleft, 1); + } + + if ((nleft == 0) && (!parse_err)) + ret = 0; + + if (munmap(start, stbuf->st_size)) + gf_msg(this->name, GF_LOG_ERROR, errno, CHANGELOG_LIB_MSG_MUNMAP_FAILED, + "munmap() error"); + +out: + if (ascii) + GF_FREE(ascii); + + return ret; +} + +static int +gf_changelog_decode(xlator_t *this, gf_changelog_journal_t *jnl, int from_fd, + int to_fd, struct stat *stbuf, int *zerob) +{ + int ret = -1; + int encoding = -1; + int major_version = -1; + int minor_version = -1; + int version_idx = -1; + size_t elen = 0; + char buffer[1024] = { + 0, + }; + + CHANGELOG_GET_HEADER_INFO(from_fd, buffer, sizeof(buffer), encoding, + major_version, minor_version, elen); + if (encoding == -1) /* unknown encoding */ + goto out; + + if (major_version == -1) /* unknown major version */ + goto out; + + if (minor_version == -1) /* unknown minor version */ + goto out; + + if (!CHANGELOG_VALID_ENCODING(encoding)) + goto out; + + if (elen == stbuf->st_size) { + *zerob = 1; + goto out; + } + + if (major_version == 1 && minor_version == 1) { + version_idx = VERSION_1_1; + } else if (major_version == 1 && minor_version == 2) { + version_idx = VERSION_1_2; + } + + if (version_idx == -1) /* unknown version number */ + goto out; + + /** + * start processing after the header + */ + if (sys_lseek(from_fd, elen, SEEK_SET) < 0) { + goto out; + } + switch (encoding) { + case CHANGELOG_ENCODE_BINARY: + /** + * this ideally should have been a part of changelog-encoders.c + * (ie. part of the changelog translator). + */ + ret = gf_changelog_parse_binary(this, jnl, from_fd, to_fd, elen, + stbuf, version_idx); + break; + + case CHANGELOG_ENCODE_ASCII: + ret = gf_changelog_parse_ascii(this, jnl, from_fd, to_fd, elen, + stbuf, version_idx); + break; + } + +out: + return ret; +} + +int +gf_changelog_publish(xlator_t *this, gf_changelog_journal_t *jnl, + char *from_path) +{ + int ret = 0; + char dest[PATH_MAX] = { + 0, + }; + char to_path[PATH_MAX] = { + 0, + }; + struct stat stbuf = { + 0, + }; + + if (snprintf(to_path, PATH_MAX, "%s%s", jnl->jnl_current_dir, + basename(from_path)) >= PATH_MAX) + return -1; + + /* handle zerob file that won't exist in current */ + ret = sys_stat(to_path, &stbuf); + if (ret) { + if (errno == ENOENT) + ret = 0; + goto out; + } + + if (snprintf(dest, PATH_MAX, "%s%s", jnl->jnl_processing_dir, + basename(from_path)) >= PATH_MAX) + return -1; + + ret = sys_rename(to_path, dest); + if (ret) { + gf_smsg(this->name, GF_LOG_ERROR, errno, + CHANGELOG_LIB_MSG_RENAME_FAILED, "from=%s", to_path, "to=%s", + dest, NULL); + } + +out: + return ret; +} + +int +gf_changelog_consume(xlator_t *this, gf_changelog_journal_t *jnl, + char *from_path, gf_boolean_t no_publish) +{ + int ret = -1; + int fd1 = 0; + int fd2 = 0; + int zerob = 0; + struct stat stbuf = { + 0, + }; + char dest[PATH_MAX] = { + 0, + }; + char to_path[PATH_MAX] = { + 0, + }; + + if (snprintf(to_path, PATH_MAX, "%s%s", jnl->jnl_current_dir, + basename(from_path)) >= PATH_MAX) + goto out; + if (snprintf(dest, PATH_MAX, "%s%s", jnl->jnl_processing_dir, + basename(from_path)) >= PATH_MAX) + goto out; + + ret = sys_stat(from_path, &stbuf); + if (ret || !S_ISREG(stbuf.st_mode)) { + ret = -1; + gf_smsg(this->name, GF_LOG_ERROR, errno, CHANGELOG_LIB_MSG_STAT_FAILED, + "path=%s", from_path, NULL); + goto out; + } + + fd1 = open(from_path, O_RDONLY); + if (fd1 < 0) { + gf_smsg(this->name, GF_LOG_ERROR, errno, CHANGELOG_LIB_MSG_OPEN_FAILED, + "path=%s", from_path, NULL); + goto out; + } + + fd2 = open(to_path, O_CREAT | O_TRUNC | O_RDWR, + S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); + if (fd2 < 0) { + gf_smsg(this->name, GF_LOG_ERROR, errno, CHANGELOG_LIB_MSG_OPEN_FAILED, + "path=%s", to_path, NULL); + goto close_fd; + } else { + ret = gf_changelog_decode(this, jnl, fd1, fd2, &stbuf, &zerob); + + sys_close(fd2); + + if (!ret) { + /* move it to processing on a successful + decode */ + if (no_publish == _gf_true) + goto close_fd; + ret = sys_rename(to_path, dest); + if (ret) + gf_smsg(this->name, GF_LOG_ERROR, errno, + CHANGELOG_LIB_MSG_RENAME_FAILED, "from=%s", to_path, + "to=%s", dest, NULL); + } + + /* remove it from .current if it's an empty file */ + if (zerob) { + /* zerob changelogs must be unlinked */ + ret = sys_unlink(to_path); + if (ret) + gf_smsg(this->name, GF_LOG_ERROR, errno, + CHANGELOG_LIB_MSG_UNLINK_FAILED, "name=empty changelog", + "path=%s", to_path, NULL); + } + } + +close_fd: + sys_close(fd1); + +out: + return ret; +} + +void * +gf_changelog_process(void *data) +{ + xlator_t *this = NULL; + gf_changelog_journal_t *jnl = NULL; + gf_changelog_entry_t *entry = NULL; + gf_changelog_processor_t *jnl_proc = NULL; + + jnl = data; + jnl_proc = jnl->jnl_proc; + THIS = jnl->this; + this = jnl->this; + + while (1) { + pthread_mutex_lock(&jnl_proc->lock); + { + while (list_empty(&jnl_proc->entries)) { + jnl_proc->waiting = _gf_true; + pthread_cond_wait(&jnl_proc->cond, &jnl_proc->lock); + } + + entry = list_first_entry(&jnl_proc->entries, gf_changelog_entry_t, + list); + if (entry) + list_del(&entry->list); + + jnl_proc->waiting = _gf_false; + } + pthread_mutex_unlock(&jnl_proc->lock); + + if (entry) { + (void)gf_changelog_consume(this, jnl, entry->path, _gf_false); + GF_FREE(entry); + } + } + + return NULL; +} + +void +gf_changelog_queue_journal(gf_changelog_processor_t *jnl_proc, + changelog_event_t *event) +{ + size_t len = 0; + gf_changelog_entry_t *entry = NULL; + + entry = GF_CALLOC(1, sizeof(gf_changelog_entry_t), + gf_changelog_mt_libgfchangelog_entry_t); + if (!entry) + return; + INIT_LIST_HEAD(&entry->list); + + len = strlen(event->u.journal.path); + (void)memcpy(entry->path, event->u.journal.path, len + 1); + entry->path[len] = '\0'; + + pthread_mutex_lock(&jnl_proc->lock); + { + list_add_tail(&entry->list, &jnl_proc->entries); + if (jnl_proc->waiting) + pthread_cond_signal(&jnl_proc->cond); + } + pthread_mutex_unlock(&jnl_proc->lock); + + return; +} + +void +gf_changelog_handle_journal(void *xl, char *brick, void *cbkdata, + changelog_event_t *event) +{ + gf_changelog_journal_t *jnl = NULL; + gf_changelog_processor_t *jnl_proc = NULL; + + jnl = cbkdata; + jnl_proc = jnl->jnl_proc; + + gf_changelog_queue_journal(jnl_proc, event); +} + +void +gf_changelog_journal_disconnect(void *xl, char *brick, void *data) +{ + gf_changelog_journal_t *jnl = NULL; + + jnl = data; + + pthread_spin_lock(&jnl->lock); + { + JNL_SET_API_STATE(jnl, JNL_API_DISCONNECTED); + }; + pthread_spin_unlock(&jnl->lock); +} + +void +gf_changelog_journal_connect(void *xl, char *brick, void *data) +{ + gf_changelog_journal_t *jnl = NULL; + + jnl = data; + + pthread_spin_lock(&jnl->lock); + { + JNL_SET_API_STATE(jnl, JNL_API_CONNECTED); + }; + pthread_spin_unlock(&jnl->lock); + + return; +} + +void +gf_changelog_cleanup_processor(gf_changelog_journal_t *jnl) +{ + int ret = 0; + xlator_t *this = NULL; + gf_changelog_processor_t *jnl_proc = NULL; + + this = THIS; + if (!this || !jnl || !jnl->jnl_proc) + goto error_return; + + jnl_proc = jnl->jnl_proc; + + ret = gf_thread_cleanup(this, jnl_proc->processor); + if (ret != 0) { + gf_msg(this->name, GF_LOG_ERROR, 0, CHANGELOG_LIB_MSG_CLEANUP_ERROR, + "failed to cleanup processor thread"); + goto error_return; + } + + (void)pthread_mutex_destroy(&jnl_proc->lock); + (void)pthread_cond_destroy(&jnl_proc->cond); + + GF_FREE(jnl_proc); + +error_return: + return; +} + +int +gf_changelog_init_processor(gf_changelog_journal_t *jnl) +{ + int ret = -1; + gf_changelog_processor_t *jnl_proc = NULL; + + jnl_proc = GF_CALLOC(1, sizeof(gf_changelog_processor_t), + gf_changelog_mt_libgfchangelog_t); + if (!jnl_proc) + goto error_return; + + ret = pthread_mutex_init(&jnl_proc->lock, NULL); + if (ret != 0) + goto free_jnl_proc; + ret = pthread_cond_init(&jnl_proc->cond, NULL); + if (ret != 0) + goto cleanup_mutex; + + INIT_LIST_HEAD(&jnl_proc->entries); + jnl_proc->waiting = _gf_false; + jnl->jnl_proc = jnl_proc; + + ret = gf_thread_create(&jnl_proc->processor, NULL, gf_changelog_process, + jnl, "clogproc"); + if (ret != 0) { + jnl->jnl_proc = NULL; + goto cleanup_cond; + } + + return 0; + +cleanup_cond: + (void)pthread_cond_destroy(&jnl_proc->cond); +cleanup_mutex: + (void)pthread_mutex_destroy(&jnl_proc->lock); +free_jnl_proc: + GF_FREE(jnl_proc); +error_return: + return -1; +} + +static void +gf_changelog_cleanup_fds(gf_changelog_journal_t *jnl) +{ + /* tracker fd */ + if (jnl->jnl_fd != -1) + sys_close(jnl->jnl_fd); + /* processing dir */ + if (jnl->jnl_dir) + sys_closedir(jnl->jnl_dir); + + if (jnl->jnl_working_dir) + free(jnl->jnl_working_dir); /* allocated by realpath */ +} + +static int +gf_changelog_open_dirs(xlator_t *this, gf_changelog_journal_t *jnl) +{ + int ret = -1; + DIR *dir = NULL; + int tracker_fd = 0; + char tracker_path[PATH_MAX] = { + 0, + }; + + /* .current */ + (void)snprintf(jnl->jnl_current_dir, PATH_MAX, + "%s/" GF_CHANGELOG_CURRENT_DIR "/", jnl->jnl_working_dir); + ret = recursive_rmdir(jnl->jnl_current_dir); + if (ret) { + gf_smsg(this->name, GF_LOG_ERROR, errno, + CHANGELOG_LIB_MSG_FAILED_TO_RMDIR, "path=%s", + jnl->jnl_current_dir, NULL); + goto out; + } + ret = mkdir_p(jnl->jnl_current_dir, 0600, _gf_false); + if (ret) + goto out; + + /* .processed */ + (void)snprintf(jnl->jnl_processed_dir, PATH_MAX, + "%s/" GF_CHANGELOG_PROCESSED_DIR "/", jnl->jnl_working_dir); + ret = mkdir_p(jnl->jnl_processed_dir, 0600, _gf_false); + if (ret) + goto out; + + /* .processing */ + (void)snprintf(jnl->jnl_processing_dir, PATH_MAX, + "%s/" GF_CHANGELOG_PROCESSING_DIR "/", jnl->jnl_working_dir); + ret = recursive_rmdir(jnl->jnl_processing_dir); + if (ret) { + gf_smsg(this->name, GF_LOG_ERROR, errno, + CHANGELOG_LIB_MSG_FAILED_TO_RMDIR, "path=%s", + jnl->jnl_processing_dir, NULL); + goto out; + } + + ret = mkdir_p(jnl->jnl_processing_dir, 0600, _gf_false); + if (ret) + goto out; + + dir = sys_opendir(jnl->jnl_processing_dir); + if (!dir) { + gf_msg("", GF_LOG_ERROR, errno, CHANGELOG_LIB_MSG_OPENDIR_ERROR, + "opendir() error"); + goto out; + } + + jnl->jnl_dir = dir; + + (void)snprintf(tracker_path, PATH_MAX, "%s/" GF_CHANGELOG_TRACKER, + jnl->jnl_working_dir); + + tracker_fd = open(tracker_path, O_CREAT | O_APPEND | O_RDWR, + S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); + if (tracker_fd < 0) { + sys_closedir(jnl->jnl_dir); + ret = -1; + goto out; + } + + jnl->jnl_fd = tracker_fd; + ret = 0; +out: + return ret; +} + +int +gf_changelog_init_history(xlator_t *this, gf_changelog_journal_t *jnl, + char *brick_path) +{ + int i = 0; + int ret = 0; + char hist_scratch_dir[PATH_MAX] = { + 0, + }; + + jnl->hist_jnl = GF_CALLOC(1, sizeof(*jnl), + gf_changelog_mt_libgfchangelog_t); + if (!jnl->hist_jnl) + goto error_return; + + jnl->hist_jnl->jnl_dir = NULL; + jnl->hist_jnl->jnl_fd = -1; + + (void)snprintf(hist_scratch_dir, PATH_MAX, + "%s/" GF_CHANGELOG_HISTORY_DIR "/", jnl->jnl_working_dir); + + ret = mkdir_p(hist_scratch_dir, 0600, _gf_false); + if (ret) + goto dealloc_hist; + + jnl->hist_jnl->jnl_working_dir = realpath(hist_scratch_dir, NULL); + if (!jnl->hist_jnl->jnl_working_dir) + goto dealloc_hist; + + ret = gf_changelog_open_dirs(this, jnl->hist_jnl); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, 0, CHANGELOG_LIB_MSG_OPENDIR_ERROR, + "could not create entries in history scratch dir"); + goto dealloc_hist; + } + + if (snprintf(jnl->hist_jnl->jnl_brickpath, PATH_MAX, "%s", brick_path) >= + PATH_MAX) + goto dealloc_hist; + + for (i = 0; i < 256; i++) { + jnl->hist_jnl->rfc3986_space_newline[i] = (i == ' ' || i == '\n' || + i == '%') + ? 0 + : i; + } + + return 0; + +dealloc_hist: + GF_FREE(jnl->hist_jnl); + jnl->hist_jnl = NULL; +error_return: + return -1; +} + +void +gf_changelog_journal_fini(void *xl, char *brick, void *data) +{ + gf_changelog_journal_t *jnl = NULL; + + jnl = data; + + gf_changelog_cleanup_processor(jnl); + + gf_changelog_cleanup_fds(jnl); + if (jnl->hist_jnl) + gf_changelog_cleanup_fds(jnl->hist_jnl); + + GF_FREE(jnl); +} + +void * +gf_changelog_journal_init(void *xl, struct gf_brick_spec *brick) +{ + int i = 0; + int ret = 0; + xlator_t *this = NULL; + struct stat buf = { + 0, + }; + char *scratch_dir = NULL; + gf_changelog_journal_t *jnl = NULL; + + this = xl; + scratch_dir = (char *)brick->ptr; + + jnl = GF_CALLOC(1, sizeof(gf_changelog_journal_t), + gf_changelog_mt_libgfchangelog_t); + if (!jnl) + goto error_return; + + if (snprintf(jnl->jnl_brickpath, PATH_MAX, "%s", brick->brick_path) >= + PATH_MAX) + goto dealloc_private; + + if (sys_stat(scratch_dir, &buf) && errno == ENOENT) { + ret = mkdir_p(scratch_dir, 0600, _gf_true); + if (ret) + goto dealloc_private; + } + + jnl->jnl_working_dir = realpath(scratch_dir, NULL); + if (!jnl->jnl_working_dir) + goto dealloc_private; + + ret = gf_changelog_open_dirs(this, jnl); + if (ret) { + gf_msg(this->name, GF_LOG_ERROR, 0, CHANGELOG_LIB_MSG_OPENDIR_ERROR, + "could not create entries in scratch dir"); + goto dealloc_private; + } + + /* RFC 3986 {de,en}coding */ + for (i = 0; i < 256; i++) { + jnl->rfc3986_space_newline[i] = (i == ' ' || i == '\n' || i == '%') ? 0 + : i; + } + + ret = gf_changelog_init_history(this, jnl, brick->brick_path); + if (ret) + goto cleanup_fds; + + /* initialize journal processor */ + jnl->this = this; + ret = gf_changelog_init_processor(jnl); + if (ret) + goto cleanup_fds; + + JNL_SET_API_STATE(jnl, JNL_API_CONN_INPROGESS); + ret = pthread_spin_init(&jnl->lock, 0); + if (ret != 0) + goto cleanup_processor; + return jnl; + +cleanup_processor: + gf_changelog_cleanup_processor(jnl); +cleanup_fds: + gf_changelog_cleanup_fds(jnl); + if (jnl->hist_jnl) + gf_changelog_cleanup_fds(jnl->hist_jnl); +dealloc_private: + GF_FREE(jnl); +error_return: + return NULL; +} |