diff options
Diffstat (limited to 'src/journal/sd-journal.c')
| -rw-r--r-- | src/journal/sd-journal.c | 2800 |
1 files changed, 0 insertions, 2800 deletions
diff --git a/src/journal/sd-journal.c b/src/journal/sd-journal.c deleted file mode 100644 index 5a2a28a8d4..0000000000 --- a/src/journal/sd-journal.c +++ /dev/null @@ -1,2800 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2011 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <errno.h> -#include <fcntl.h> -#include <linux/magic.h> -#include <poll.h> -#include <stddef.h> -#include <sys/inotify.h> -#include <sys/vfs.h> -#include <unistd.h> - -#include "sd-journal.h" - -#include "alloc-util.h" -#include "catalog.h" -#include "compress.h" -#include "dirent-util.h" -#include "fd-util.h" -#include "fileio.h" -#include "formats-util.h" -#include "fs-util.h" -#include "hashmap.h" -#include "hostname-util.h" -#include "io-util.h" -#include "journal-def.h" -#include "journal-file.h" -#include "journal-internal.h" -#include "list.h" -#include "lookup3.h" -#include "missing.h" -#include "path-util.h" -#include "replace-var.h" -#include "stat-util.h" -#include "stdio-util.h" -#include "string-util.h" -#include "strv.h" - -#define JOURNAL_FILES_MAX 7168 - -#define JOURNAL_FILES_RECHECK_USEC (2 * USEC_PER_SEC) - -#define REPLACE_VAR_MAX 256 - -#define DEFAULT_DATA_THRESHOLD (64*1024) - -static void remove_file_real(sd_journal *j, JournalFile *f); - -static bool journal_pid_changed(sd_journal *j) { - assert(j); - - /* We don't support people creating a journal object and - * keeping it around over a fork(). Let's complain. */ - - return j->original_pid != getpid(); -} - -static int journal_put_error(sd_journal *j, int r, const char *path) { - char *copy; - int k; - - /* Memorize an error we encountered, and store which - * file/directory it was generated from. Note that we store - * only *one* path per error code, as the error code is the - * key into the hashmap, and the path is the value. This means - * we keep track only of all error kinds, but not of all error - * locations. This has the benefit that the hashmap cannot - * grow beyond bounds. - * - * We return an error here only if we didn't manage to - * memorize the real error. */ - - if (r >= 0) - return r; - - k = hashmap_ensure_allocated(&j->errors, NULL); - if (k < 0) - return k; - - if (path) { - copy = strdup(path); - if (!copy) - return -ENOMEM; - } else - copy = NULL; - - k = hashmap_put(j->errors, INT_TO_PTR(r), copy); - if (k < 0) { - free(copy); - - if (k == -EEXIST) - return 0; - - return k; - } - - return 0; -} - -static void detach_location(sd_journal *j) { - Iterator i; - JournalFile *f; - - assert(j); - - j->current_file = NULL; - j->current_field = 0; - - ORDERED_HASHMAP_FOREACH(f, j->files, i) - journal_file_reset_location(f); -} - -static void reset_location(sd_journal *j) { - assert(j); - - detach_location(j); - zero(j->current_location); -} - -static void init_location(Location *l, LocationType type, JournalFile *f, Object *o) { - assert(l); - assert(type == LOCATION_DISCRETE || type == LOCATION_SEEK); - assert(f); - assert(o->object.type == OBJECT_ENTRY); - - l->type = type; - l->seqnum = le64toh(o->entry.seqnum); - l->seqnum_id = f->header->seqnum_id; - l->realtime = le64toh(o->entry.realtime); - l->monotonic = le64toh(o->entry.monotonic); - l->boot_id = o->entry.boot_id; - l->xor_hash = le64toh(o->entry.xor_hash); - - l->seqnum_set = l->realtime_set = l->monotonic_set = l->xor_hash_set = true; -} - -static void set_location(sd_journal *j, JournalFile *f, Object *o) { - assert(j); - assert(f); - assert(o); - - init_location(&j->current_location, LOCATION_DISCRETE, f, o); - - j->current_file = f; - j->current_field = 0; - - /* Let f know its candidate entry was picked. */ - assert(f->location_type == LOCATION_SEEK); - f->location_type = LOCATION_DISCRETE; -} - -static int match_is_valid(const void *data, size_t size) { - const char *b, *p; - - assert(data); - - if (size < 2) - return false; - - if (startswith(data, "__")) - return false; - - b = data; - for (p = b; p < b + size; p++) { - - if (*p == '=') - return p > b; - - if (*p == '_') - continue; - - if (*p >= 'A' && *p <= 'Z') - continue; - - if (*p >= '0' && *p <= '9') - continue; - - return false; - } - - return false; -} - -static bool same_field(const void *_a, size_t s, const void *_b, size_t t) { - const uint8_t *a = _a, *b = _b; - size_t j; - - for (j = 0; j < s && j < t; j++) { - - if (a[j] != b[j]) - return false; - - if (a[j] == '=') - return true; - } - - assert_not_reached("\"=\" not found"); -} - -static Match *match_new(Match *p, MatchType t) { - Match *m; - - m = new0(Match, 1); - if (!m) - return NULL; - - m->type = t; - - if (p) { - m->parent = p; - LIST_PREPEND(matches, p->matches, m); - } - - return m; -} - -static void match_free(Match *m) { - assert(m); - - while (m->matches) - match_free(m->matches); - - if (m->parent) - LIST_REMOVE(matches, m->parent->matches, m); - - free(m->data); - free(m); -} - -static void match_free_if_empty(Match *m) { - if (!m || m->matches) - return; - - match_free(m); -} - -_public_ int sd_journal_add_match(sd_journal *j, const void *data, size_t size) { - Match *l3, *l4, *add_here = NULL, *m; - le64_t le_hash; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(data, -EINVAL); - - if (size == 0) - size = strlen(data); - - assert_return(match_is_valid(data, size), -EINVAL); - - /* level 0: AND term - * level 1: OR terms - * level 2: AND terms - * level 3: OR terms - * level 4: concrete matches */ - - if (!j->level0) { - j->level0 = match_new(NULL, MATCH_AND_TERM); - if (!j->level0) - return -ENOMEM; - } - - if (!j->level1) { - j->level1 = match_new(j->level0, MATCH_OR_TERM); - if (!j->level1) - return -ENOMEM; - } - - if (!j->level2) { - j->level2 = match_new(j->level1, MATCH_AND_TERM); - if (!j->level2) - return -ENOMEM; - } - - assert(j->level0->type == MATCH_AND_TERM); - assert(j->level1->type == MATCH_OR_TERM); - assert(j->level2->type == MATCH_AND_TERM); - - le_hash = htole64(hash64(data, size)); - - LIST_FOREACH(matches, l3, j->level2->matches) { - assert(l3->type == MATCH_OR_TERM); - - LIST_FOREACH(matches, l4, l3->matches) { - assert(l4->type == MATCH_DISCRETE); - - /* Exactly the same match already? Then ignore - * this addition */ - if (l4->le_hash == le_hash && - l4->size == size && - memcmp(l4->data, data, size) == 0) - return 0; - - /* Same field? Then let's add this to this OR term */ - if (same_field(data, size, l4->data, l4->size)) { - add_here = l3; - break; - } - } - - if (add_here) - break; - } - - if (!add_here) { - add_here = match_new(j->level2, MATCH_OR_TERM); - if (!add_here) - goto fail; - } - - m = match_new(add_here, MATCH_DISCRETE); - if (!m) - goto fail; - - m->le_hash = le_hash; - m->size = size; - m->data = memdup(data, size); - if (!m->data) - goto fail; - - detach_location(j); - - return 0; - -fail: - match_free_if_empty(add_here); - match_free_if_empty(j->level2); - match_free_if_empty(j->level1); - match_free_if_empty(j->level0); - - return -ENOMEM; -} - -_public_ int sd_journal_add_conjunction(sd_journal *j) { - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - if (!j->level0) - return 0; - - if (!j->level1) - return 0; - - if (!j->level1->matches) - return 0; - - j->level1 = NULL; - j->level2 = NULL; - - return 0; -} - -_public_ int sd_journal_add_disjunction(sd_journal *j) { - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - if (!j->level0) - return 0; - - if (!j->level1) - return 0; - - if (!j->level2) - return 0; - - if (!j->level2->matches) - return 0; - - j->level2 = NULL; - return 0; -} - -static char *match_make_string(Match *m) { - char *p, *r; - Match *i; - bool enclose = false; - - if (!m) - return strdup("none"); - - if (m->type == MATCH_DISCRETE) - return strndup(m->data, m->size); - - p = NULL; - LIST_FOREACH(matches, i, m->matches) { - char *t, *k; - - t = match_make_string(i); - if (!t) { - free(p); - return NULL; - } - - if (p) { - k = strjoin(p, m->type == MATCH_OR_TERM ? " OR " : " AND ", t, NULL); - free(p); - free(t); - - if (!k) - return NULL; - - p = k; - - enclose = true; - } else - p = t; - } - - if (enclose) { - r = strjoin("(", p, ")", NULL); - free(p); - return r; - } - - return p; -} - -char *journal_make_match_string(sd_journal *j) { - assert(j); - - return match_make_string(j->level0); -} - -_public_ void sd_journal_flush_matches(sd_journal *j) { - if (!j) - return; - - if (j->level0) - match_free(j->level0); - - j->level0 = j->level1 = j->level2 = NULL; - - detach_location(j); -} - -_pure_ static int compare_with_location(JournalFile *f, Location *l) { - assert(f); - assert(l); - assert(f->location_type == LOCATION_SEEK); - assert(l->type == LOCATION_DISCRETE || l->type == LOCATION_SEEK); - - if (l->monotonic_set && - sd_id128_equal(f->current_boot_id, l->boot_id) && - l->realtime_set && - f->current_realtime == l->realtime && - l->xor_hash_set && - f->current_xor_hash == l->xor_hash) - return 0; - - if (l->seqnum_set && - sd_id128_equal(f->header->seqnum_id, l->seqnum_id)) { - - if (f->current_seqnum < l->seqnum) - return -1; - if (f->current_seqnum > l->seqnum) - return 1; - } - - if (l->monotonic_set && - sd_id128_equal(f->current_boot_id, l->boot_id)) { - - if (f->current_monotonic < l->monotonic) - return -1; - if (f->current_monotonic > l->monotonic) - return 1; - } - - if (l->realtime_set) { - - if (f->current_realtime < l->realtime) - return -1; - if (f->current_realtime > l->realtime) - return 1; - } - - if (l->xor_hash_set) { - - if (f->current_xor_hash < l->xor_hash) - return -1; - if (f->current_xor_hash > l->xor_hash) - return 1; - } - - return 0; -} - -static int next_for_match( - sd_journal *j, - Match *m, - JournalFile *f, - uint64_t after_offset, - direction_t direction, - Object **ret, - uint64_t *offset) { - - int r; - uint64_t np = 0; - Object *n; - - assert(j); - assert(m); - assert(f); - - if (m->type == MATCH_DISCRETE) { - uint64_t dp; - - r = journal_file_find_data_object_with_hash(f, m->data, m->size, le64toh(m->le_hash), NULL, &dp); - if (r <= 0) - return r; - - return journal_file_move_to_entry_by_offset_for_data(f, dp, after_offset, direction, ret, offset); - - } else if (m->type == MATCH_OR_TERM) { - Match *i; - - /* Find the earliest match beyond after_offset */ - - LIST_FOREACH(matches, i, m->matches) { - uint64_t cp; - - r = next_for_match(j, i, f, after_offset, direction, NULL, &cp); - if (r < 0) - return r; - else if (r > 0) { - if (np == 0 || (direction == DIRECTION_DOWN ? cp < np : cp > np)) - np = cp; - } - } - - if (np == 0) - return 0; - - } else if (m->type == MATCH_AND_TERM) { - Match *i, *last_moved; - - /* Always jump to the next matching entry and repeat - * this until we find an offset that matches for all - * matches. */ - - if (!m->matches) - return 0; - - r = next_for_match(j, m->matches, f, after_offset, direction, NULL, &np); - if (r <= 0) - return r; - - assert(direction == DIRECTION_DOWN ? np >= after_offset : np <= after_offset); - last_moved = m->matches; - - LIST_LOOP_BUT_ONE(matches, i, m->matches, last_moved) { - uint64_t cp; - - r = next_for_match(j, i, f, np, direction, NULL, &cp); - if (r <= 0) - return r; - - assert(direction == DIRECTION_DOWN ? cp >= np : cp <= np); - if (direction == DIRECTION_DOWN ? cp > np : cp < np) { - np = cp; - last_moved = i; - } - } - } - - assert(np > 0); - - r = journal_file_move_to_object(f, OBJECT_ENTRY, np, &n); - if (r < 0) - return r; - - if (ret) - *ret = n; - if (offset) - *offset = np; - - return 1; -} - -static int find_location_for_match( - sd_journal *j, - Match *m, - JournalFile *f, - direction_t direction, - Object **ret, - uint64_t *offset) { - - int r; - - assert(j); - assert(m); - assert(f); - - if (m->type == MATCH_DISCRETE) { - uint64_t dp; - - r = journal_file_find_data_object_with_hash(f, m->data, m->size, le64toh(m->le_hash), NULL, &dp); - if (r <= 0) - return r; - - /* FIXME: missing: find by monotonic */ - - if (j->current_location.type == LOCATION_HEAD) - return journal_file_next_entry_for_data(f, NULL, 0, dp, DIRECTION_DOWN, ret, offset); - if (j->current_location.type == LOCATION_TAIL) - return journal_file_next_entry_for_data(f, NULL, 0, dp, DIRECTION_UP, ret, offset); - if (j->current_location.seqnum_set && sd_id128_equal(j->current_location.seqnum_id, f->header->seqnum_id)) - return journal_file_move_to_entry_by_seqnum_for_data(f, dp, j->current_location.seqnum, direction, ret, offset); - if (j->current_location.monotonic_set) { - r = journal_file_move_to_entry_by_monotonic_for_data(f, dp, j->current_location.boot_id, j->current_location.monotonic, direction, ret, offset); - if (r != -ENOENT) - return r; - } - if (j->current_location.realtime_set) - return journal_file_move_to_entry_by_realtime_for_data(f, dp, j->current_location.realtime, direction, ret, offset); - - return journal_file_next_entry_for_data(f, NULL, 0, dp, direction, ret, offset); - - } else if (m->type == MATCH_OR_TERM) { - uint64_t np = 0; - Object *n; - Match *i; - - /* Find the earliest match */ - - LIST_FOREACH(matches, i, m->matches) { - uint64_t cp; - - r = find_location_for_match(j, i, f, direction, NULL, &cp); - if (r < 0) - return r; - else if (r > 0) { - if (np == 0 || (direction == DIRECTION_DOWN ? np > cp : np < cp)) - np = cp; - } - } - - if (np == 0) - return 0; - - r = journal_file_move_to_object(f, OBJECT_ENTRY, np, &n); - if (r < 0) - return r; - - if (ret) - *ret = n; - if (offset) - *offset = np; - - return 1; - - } else { - Match *i; - uint64_t np = 0; - - assert(m->type == MATCH_AND_TERM); - - /* First jump to the last match, and then find the - * next one where all matches match */ - - if (!m->matches) - return 0; - - LIST_FOREACH(matches, i, m->matches) { - uint64_t cp; - - r = find_location_for_match(j, i, f, direction, NULL, &cp); - if (r <= 0) - return r; - - if (np == 0 || (direction == DIRECTION_DOWN ? cp > np : cp < np)) - np = cp; - } - - return next_for_match(j, m, f, np, direction, ret, offset); - } -} - -static int find_location_with_matches( - sd_journal *j, - JournalFile *f, - direction_t direction, - Object **ret, - uint64_t *offset) { - - int r; - - assert(j); - assert(f); - assert(ret); - assert(offset); - - if (!j->level0) { - /* No matches is simple */ - - if (j->current_location.type == LOCATION_HEAD) - return journal_file_next_entry(f, 0, DIRECTION_DOWN, ret, offset); - if (j->current_location.type == LOCATION_TAIL) - return journal_file_next_entry(f, 0, DIRECTION_UP, ret, offset); - if (j->current_location.seqnum_set && sd_id128_equal(j->current_location.seqnum_id, f->header->seqnum_id)) - return journal_file_move_to_entry_by_seqnum(f, j->current_location.seqnum, direction, ret, offset); - if (j->current_location.monotonic_set) { - r = journal_file_move_to_entry_by_monotonic(f, j->current_location.boot_id, j->current_location.monotonic, direction, ret, offset); - if (r != -ENOENT) - return r; - } - if (j->current_location.realtime_set) - return journal_file_move_to_entry_by_realtime(f, j->current_location.realtime, direction, ret, offset); - - return journal_file_next_entry(f, 0, direction, ret, offset); - } else - return find_location_for_match(j, j->level0, f, direction, ret, offset); -} - -static int next_with_matches( - sd_journal *j, - JournalFile *f, - direction_t direction, - Object **ret, - uint64_t *offset) { - - assert(j); - assert(f); - assert(ret); - assert(offset); - - /* No matches is easy. We simple advance the file - * pointer by one. */ - if (!j->level0) - return journal_file_next_entry(f, f->current_offset, direction, ret, offset); - - /* If we have a match then we look for the next matching entry - * with an offset at least one step larger */ - return next_for_match(j, j->level0, f, - direction == DIRECTION_DOWN ? f->current_offset + 1 - : f->current_offset - 1, - direction, ret, offset); -} - -static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direction) { - Object *c; - uint64_t cp, n_entries; - int r; - - assert(j); - assert(f); - - n_entries = le64toh(f->header->n_entries); - - /* If we hit EOF before, we don't need to look into this file again - * unless direction changed or new entries appeared. */ - if (f->last_direction == direction && f->location_type == LOCATION_TAIL && - n_entries == f->last_n_entries) - return 0; - - f->last_n_entries = n_entries; - - if (f->last_direction == direction && f->current_offset > 0) { - /* LOCATION_SEEK here means we did the work in a previous - * iteration and the current location already points to a - * candidate entry. */ - if (f->location_type != LOCATION_SEEK) { - r = next_with_matches(j, f, direction, &c, &cp); - if (r <= 0) - return r; - - journal_file_save_location(f, c, cp); - } - } else { - f->last_direction = direction; - - r = find_location_with_matches(j, f, direction, &c, &cp); - if (r <= 0) - return r; - - journal_file_save_location(f, c, cp); - } - - /* OK, we found the spot, now let's advance until an entry - * that is actually different from what we were previously - * looking at. This is necessary to handle entries which exist - * in two (or more) journal files, and which shall all be - * suppressed but one. */ - - for (;;) { - bool found; - - if (j->current_location.type == LOCATION_DISCRETE) { - int k; - - k = compare_with_location(f, &j->current_location); - - found = direction == DIRECTION_DOWN ? k > 0 : k < 0; - } else - found = true; - - if (found) - return 1; - - r = next_with_matches(j, f, direction, &c, &cp); - if (r <= 0) - return r; - - journal_file_save_location(f, c, cp); - } -} - -static int real_journal_next(sd_journal *j, direction_t direction) { - JournalFile *f, *new_file = NULL; - Iterator i; - Object *o; - int r; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - ORDERED_HASHMAP_FOREACH(f, j->files, i) { - bool found; - - r = next_beyond_location(j, f, direction); - if (r < 0) { - log_debug_errno(r, "Can't iterate through %s, ignoring: %m", f->path); - remove_file_real(j, f); - continue; - } else if (r == 0) { - f->location_type = LOCATION_TAIL; - continue; - } - - if (!new_file) - found = true; - else { - int k; - - k = journal_file_compare_locations(f, new_file); - - found = direction == DIRECTION_DOWN ? k < 0 : k > 0; - } - - if (found) - new_file = f; - } - - if (!new_file) - return 0; - - r = journal_file_move_to_object(new_file, OBJECT_ENTRY, new_file->current_offset, &o); - if (r < 0) - return r; - - set_location(j, new_file, o); - - return 1; -} - -_public_ int sd_journal_next(sd_journal *j) { - return real_journal_next(j, DIRECTION_DOWN); -} - -_public_ int sd_journal_previous(sd_journal *j) { - return real_journal_next(j, DIRECTION_UP); -} - -static int real_journal_next_skip(sd_journal *j, direction_t direction, uint64_t skip) { - int c = 0, r; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - if (skip == 0) { - /* If this is not a discrete skip, then at least - * resolve the current location */ - if (j->current_location.type != LOCATION_DISCRETE) - return real_journal_next(j, direction); - - return 0; - } - - do { - r = real_journal_next(j, direction); - if (r < 0) - return r; - - if (r == 0) - return c; - - skip--; - c++; - } while (skip > 0); - - return c; -} - -_public_ int sd_journal_next_skip(sd_journal *j, uint64_t skip) { - return real_journal_next_skip(j, DIRECTION_DOWN, skip); -} - -_public_ int sd_journal_previous_skip(sd_journal *j, uint64_t skip) { - return real_journal_next_skip(j, DIRECTION_UP, skip); -} - -_public_ int sd_journal_get_cursor(sd_journal *j, char **cursor) { - Object *o; - int r; - char bid[33], sid[33]; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(cursor, -EINVAL); - - if (!j->current_file || j->current_file->current_offset <= 0) - return -EADDRNOTAVAIL; - - r = journal_file_move_to_object(j->current_file, OBJECT_ENTRY, j->current_file->current_offset, &o); - if (r < 0) - return r; - - sd_id128_to_string(j->current_file->header->seqnum_id, sid); - sd_id128_to_string(o->entry.boot_id, bid); - - if (asprintf(cursor, - "s=%s;i=%"PRIx64";b=%s;m=%"PRIx64";t=%"PRIx64";x=%"PRIx64, - sid, le64toh(o->entry.seqnum), - bid, le64toh(o->entry.monotonic), - le64toh(o->entry.realtime), - le64toh(o->entry.xor_hash)) < 0) - return -ENOMEM; - - return 0; -} - -_public_ int sd_journal_seek_cursor(sd_journal *j, const char *cursor) { - const char *word, *state; - size_t l; - unsigned long long seqnum, monotonic, realtime, xor_hash; - bool - seqnum_id_set = false, - seqnum_set = false, - boot_id_set = false, - monotonic_set = false, - realtime_set = false, - xor_hash_set = false; - sd_id128_t seqnum_id, boot_id; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(!isempty(cursor), -EINVAL); - - FOREACH_WORD_SEPARATOR(word, l, cursor, ";", state) { - char *item; - int k = 0; - - if (l < 2 || word[1] != '=') - return -EINVAL; - - item = strndup(word, l); - if (!item) - return -ENOMEM; - - switch (word[0]) { - - case 's': - seqnum_id_set = true; - k = sd_id128_from_string(item+2, &seqnum_id); - break; - - case 'i': - seqnum_set = true; - if (sscanf(item+2, "%llx", &seqnum) != 1) - k = -EINVAL; - break; - - case 'b': - boot_id_set = true; - k = sd_id128_from_string(item+2, &boot_id); - break; - - case 'm': - monotonic_set = true; - if (sscanf(item+2, "%llx", &monotonic) != 1) - k = -EINVAL; - break; - - case 't': - realtime_set = true; - if (sscanf(item+2, "%llx", &realtime) != 1) - k = -EINVAL; - break; - - case 'x': - xor_hash_set = true; - if (sscanf(item+2, "%llx", &xor_hash) != 1) - k = -EINVAL; - break; - } - - free(item); - - if (k < 0) - return k; - } - - if ((!seqnum_set || !seqnum_id_set) && - (!monotonic_set || !boot_id_set) && - !realtime_set) - return -EINVAL; - - reset_location(j); - - j->current_location.type = LOCATION_SEEK; - - if (realtime_set) { - j->current_location.realtime = (uint64_t) realtime; - j->current_location.realtime_set = true; - } - - if (seqnum_set && seqnum_id_set) { - j->current_location.seqnum = (uint64_t) seqnum; - j->current_location.seqnum_id = seqnum_id; - j->current_location.seqnum_set = true; - } - - if (monotonic_set && boot_id_set) { - j->current_location.monotonic = (uint64_t) monotonic; - j->current_location.boot_id = boot_id; - j->current_location.monotonic_set = true; - } - - if (xor_hash_set) { - j->current_location.xor_hash = (uint64_t) xor_hash; - j->current_location.xor_hash_set = true; - } - - return 0; -} - -_public_ int sd_journal_test_cursor(sd_journal *j, const char *cursor) { - int r; - Object *o; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(!isempty(cursor), -EINVAL); - - if (!j->current_file || j->current_file->current_offset <= 0) - return -EADDRNOTAVAIL; - - r = journal_file_move_to_object(j->current_file, OBJECT_ENTRY, j->current_file->current_offset, &o); - if (r < 0) - return r; - - for(;;) { - _cleanup_free_ char *item = NULL; - unsigned long long ll; - sd_id128_t id; - int k = 0; - - r = extract_first_word(&cursor, &item, ";", EXTRACT_DONT_COALESCE_SEPARATORS); - if (r < 0) - return r; - - if (r == 0) - break; - - if (strlen(item) < 2 || item[1] != '=') - return -EINVAL; - - switch (item[0]) { - - case 's': - k = sd_id128_from_string(item+2, &id); - if (k < 0) - return k; - if (!sd_id128_equal(id, j->current_file->header->seqnum_id)) - return 0; - break; - - case 'i': - if (sscanf(item+2, "%llx", &ll) != 1) - return -EINVAL; - if (ll != le64toh(o->entry.seqnum)) - return 0; - break; - - case 'b': - k = sd_id128_from_string(item+2, &id); - if (k < 0) - return k; - if (!sd_id128_equal(id, o->entry.boot_id)) - return 0; - break; - - case 'm': - if (sscanf(item+2, "%llx", &ll) != 1) - return -EINVAL; - if (ll != le64toh(o->entry.monotonic)) - return 0; - break; - - case 't': - if (sscanf(item+2, "%llx", &ll) != 1) - return -EINVAL; - if (ll != le64toh(o->entry.realtime)) - return 0; - break; - - case 'x': - if (sscanf(item+2, "%llx", &ll) != 1) - return -EINVAL; - if (ll != le64toh(o->entry.xor_hash)) - return 0; - break; - } - } - - return 1; -} - - -_public_ int sd_journal_seek_monotonic_usec(sd_journal *j, sd_id128_t boot_id, uint64_t usec) { - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - reset_location(j); - j->current_location.type = LOCATION_SEEK; - j->current_location.boot_id = boot_id; - j->current_location.monotonic = usec; - j->current_location.monotonic_set = true; - - return 0; -} - -_public_ int sd_journal_seek_realtime_usec(sd_journal *j, uint64_t usec) { - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - reset_location(j); - j->current_location.type = LOCATION_SEEK; - j->current_location.realtime = usec; - j->current_location.realtime_set = true; - - return 0; -} - -_public_ int sd_journal_seek_head(sd_journal *j) { - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - reset_location(j); - j->current_location.type = LOCATION_HEAD; - - return 0; -} - -_public_ int sd_journal_seek_tail(sd_journal *j) { - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - reset_location(j); - j->current_location.type = LOCATION_TAIL; - - return 0; -} - -static void check_network(sd_journal *j, int fd) { - struct statfs sfs; - - assert(j); - - if (j->on_network) - return; - - if (fstatfs(fd, &sfs) < 0) - return; - - j->on_network = - F_TYPE_EQUAL(sfs.f_type, CIFS_MAGIC_NUMBER) || - F_TYPE_EQUAL(sfs.f_type, CODA_SUPER_MAGIC) || - F_TYPE_EQUAL(sfs.f_type, NCP_SUPER_MAGIC) || - F_TYPE_EQUAL(sfs.f_type, NFS_SUPER_MAGIC) || - F_TYPE_EQUAL(sfs.f_type, SMB_SUPER_MAGIC); -} - -static bool file_has_type_prefix(const char *prefix, const char *filename) { - const char *full, *tilded, *atted; - - full = strjoina(prefix, ".journal"); - tilded = strjoina(full, "~"); - atted = strjoina(prefix, "@"); - - return streq(filename, full) || - streq(filename, tilded) || - startswith(filename, atted); -} - -static bool file_type_wanted(int flags, const char *filename) { - assert(filename); - - if (!endswith(filename, ".journal") && !endswith(filename, ".journal~")) - return false; - - /* no flags set → every type is OK */ - if (!(flags & (SD_JOURNAL_SYSTEM | SD_JOURNAL_CURRENT_USER))) - return true; - - if (flags & SD_JOURNAL_SYSTEM && file_has_type_prefix("system", filename)) - return true; - - if (flags & SD_JOURNAL_CURRENT_USER) { - char prefix[5 + DECIMAL_STR_MAX(uid_t) + 1]; - - xsprintf(prefix, "user-"UID_FMT, getuid()); - - if (file_has_type_prefix(prefix, filename)) - return true; - } - - return false; -} - -static int add_any_file(sd_journal *j, const char *path) { - JournalFile *f = NULL; - int r, k; - - assert(j); - assert(path); - - if (ordered_hashmap_get(j->files, path)) - return 0; - - if (ordered_hashmap_size(j->files) >= JOURNAL_FILES_MAX) { - log_debug("Too many open journal files, not adding %s.", path); - r = -ETOOMANYREFS; - goto fail; - } - - r = journal_file_open(path, O_RDONLY, 0, false, false, NULL, j->mmap, NULL, &f); - if (r < 0) { - log_debug_errno(r, "Failed to open journal file %s: %m", path); - goto fail; - } - - /* journal_file_dump(f); */ - - r = ordered_hashmap_put(j->files, f->path, f); - if (r < 0) { - journal_file_close(f); - goto fail; - } - - log_debug("File %s added.", f->path); - - check_network(j, f->fd); - - j->current_invalidate_counter ++; - - return 0; - -fail: - k = journal_put_error(j, r, path); - if (k < 0) - return k; - - return r; -} - -static int add_file(sd_journal *j, const char *prefix, const char *filename) { - const char *path; - - assert(j); - assert(prefix); - assert(filename); - - if (j->no_new_files || - !file_type_wanted(j->flags, filename)) - return 0; - - path = strjoina(prefix, "/", filename); - - if (!j->has_runtime_files && path_startswith(path, "/run/log/journal")) - j->has_runtime_files = true; - else if (!j->has_persistent_files && path_startswith(path, "/var/log/journal")) - j->has_persistent_files = true; - - return add_any_file(j, path); -} - -static void remove_file(sd_journal *j, const char *prefix, const char *filename) { - const char *path; - JournalFile *f; - - assert(j); - assert(prefix); - assert(filename); - - path = strjoina(prefix, "/", filename); - f = ordered_hashmap_get(j->files, path); - if (!f) - return; - - remove_file_real(j, f); -} - -static void remove_file_real(sd_journal *j, JournalFile *f) { - assert(j); - assert(f); - - ordered_hashmap_remove(j->files, f->path); - - log_debug("File %s removed.", f->path); - - if (j->current_file == f) { - j->current_file = NULL; - j->current_field = 0; - } - - if (j->unique_file == f) { - /* Jump to the next unique_file or NULL if that one was last */ - j->unique_file = ordered_hashmap_next(j->files, j->unique_file->path); - j->unique_offset = 0; - if (!j->unique_file) - j->unique_file_lost = true; - } - - if (j->fields_file == f) { - j->fields_file = ordered_hashmap_next(j->files, j->fields_file->path); - j->fields_offset = 0; - if (!j->fields_file) - j->fields_file_lost = true; - } - - journal_file_close(f); - - j->current_invalidate_counter ++; -} - -static int dirname_is_machine_id(const char *fn) { - sd_id128_t id, machine; - int r; - - r = sd_id128_get_machine(&machine); - if (r < 0) - return r; - - r = sd_id128_from_string(fn, &id); - if (r < 0) - return r; - - return sd_id128_equal(id, machine); -} - -static int add_directory(sd_journal *j, const char *prefix, const char *dirname) { - _cleanup_free_ char *path = NULL; - _cleanup_closedir_ DIR *d = NULL; - struct dirent *de = NULL; - Directory *m; - int r, k; - - assert(j); - assert(prefix); - assert(dirname); - - log_debug("Considering %s/%s.", prefix, dirname); - - if ((j->flags & SD_JOURNAL_LOCAL_ONLY) && - !(dirname_is_machine_id(dirname) > 0 || path_startswith(prefix, "/run"))) - return 0; - - path = strjoin(prefix, "/", dirname, NULL); - if (!path) { - r = -ENOMEM; - goto fail; - } - - d = opendir(path); - if (!d) { - r = log_debug_errno(errno, "Failed to open directory %s: %m", path); - goto fail; - } - - m = hashmap_get(j->directories_by_path, path); - if (!m) { - m = new0(Directory, 1); - if (!m) { - r = -ENOMEM; - goto fail; - } - - m->is_root = false; - m->path = path; - - if (hashmap_put(j->directories_by_path, m->path, m) < 0) { - free(m); - r = -ENOMEM; - goto fail; - } - - path = NULL; /* avoid freeing in cleanup */ - j->current_invalidate_counter ++; - - log_debug("Directory %s added.", m->path); - - } else if (m->is_root) - return 0; - - if (m->wd <= 0 && j->inotify_fd >= 0) { - - m->wd = inotify_add_watch(j->inotify_fd, m->path, - IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE| - IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_MOVED_FROM| - IN_ONLYDIR); - - if (m->wd > 0 && hashmap_put(j->directories_by_wd, INT_TO_PTR(m->wd), m) < 0) - inotify_rm_watch(j->inotify_fd, m->wd); - } - - FOREACH_DIRENT_ALL(de, d, return log_debug_errno(errno, "Failed to read directory %s: %m", m->path)) { - - if (dirent_is_file_with_suffix(de, ".journal") || - dirent_is_file_with_suffix(de, ".journal~")) - (void) add_file(j, m->path, de->d_name); - } - - check_network(j, dirfd(d)); - - return 0; - -fail: - k = journal_put_error(j, r, path ?: dirname); - if (k < 0) - return k; - - return r; -} - -static int add_root_directory(sd_journal *j, const char *p, bool missing_ok) { - _cleanup_closedir_ DIR *d = NULL; - struct dirent *de; - Directory *m; - int r, k; - - assert(j); - assert(p); - - if ((j->flags & SD_JOURNAL_RUNTIME_ONLY) && - !path_startswith(p, "/run")) - return -EINVAL; - - if (j->prefix) - p = strjoina(j->prefix, p); - - d = opendir(p); - if (!d) { - if (errno == ENOENT && missing_ok) - return 0; - - r = log_debug_errno(errno, "Failed to open root directory %s: %m", p); - goto fail; - } - - m = hashmap_get(j->directories_by_path, p); - if (!m) { - m = new0(Directory, 1); - if (!m) { - r = -ENOMEM; - goto fail; - } - - m->is_root = true; - m->path = strdup(p); - if (!m->path) { - free(m); - r = -ENOMEM; - goto fail; - } - - if (hashmap_put(j->directories_by_path, m->path, m) < 0) { - free(m->path); - free(m); - r = -ENOMEM; - goto fail; - } - - j->current_invalidate_counter ++; - - log_debug("Root directory %s added.", m->path); - - } else if (!m->is_root) - return 0; - - if (m->wd <= 0 && j->inotify_fd >= 0) { - - m->wd = inotify_add_watch(j->inotify_fd, m->path, - IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE| - IN_ONLYDIR); - - if (m->wd > 0 && hashmap_put(j->directories_by_wd, INT_TO_PTR(m->wd), m) < 0) - inotify_rm_watch(j->inotify_fd, m->wd); - } - - if (j->no_new_files) - return 0; - - FOREACH_DIRENT_ALL(de, d, return log_debug_errno(errno, "Failed to read directory %s: %m", m->path)) { - sd_id128_t id; - - if (dirent_is_file_with_suffix(de, ".journal") || - dirent_is_file_with_suffix(de, ".journal~")) - (void) add_file(j, m->path, de->d_name); - else if (IN_SET(de->d_type, DT_DIR, DT_LNK, DT_UNKNOWN) && - sd_id128_from_string(de->d_name, &id) >= 0) - (void) add_directory(j, m->path, de->d_name); - } - - check_network(j, dirfd(d)); - - return 0; - -fail: - k = journal_put_error(j, r, p); - if (k < 0) - return k; - - return r; -} - -static void remove_directory(sd_journal *j, Directory *d) { - assert(j); - - if (d->wd > 0) { - hashmap_remove(j->directories_by_wd, INT_TO_PTR(d->wd)); - - if (j->inotify_fd >= 0) - inotify_rm_watch(j->inotify_fd, d->wd); - } - - hashmap_remove(j->directories_by_path, d->path); - - if (d->is_root) - log_debug("Root directory %s removed.", d->path); - else - log_debug("Directory %s removed.", d->path); - - free(d->path); - free(d); -} - -static int add_search_paths(sd_journal *j) { - - static const char search_paths[] = - "/run/log/journal\0" - "/var/log/journal\0"; - const char *p; - - assert(j); - - /* We ignore most errors here, since the idea is to only open - * what's actually accessible, and ignore the rest. */ - - NULSTR_FOREACH(p, search_paths) - (void) add_root_directory(j, p, true); - - return 0; -} - -static int add_current_paths(sd_journal *j) { - Iterator i; - JournalFile *f; - - assert(j); - assert(j->no_new_files); - - /* Simply adds all directories for files we have open as - * "root" directories. We don't expect errors here, so we - * treat them as fatal. */ - - ORDERED_HASHMAP_FOREACH(f, j->files, i) { - _cleanup_free_ char *dir; - int r; - - dir = dirname_malloc(f->path); - if (!dir) - return -ENOMEM; - - r = add_root_directory(j, dir, true); - if (r < 0) - return r; - } - - return 0; -} - -static int allocate_inotify(sd_journal *j) { - assert(j); - - if (j->inotify_fd < 0) { - j->inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); - if (j->inotify_fd < 0) - return -errno; - } - - if (!j->directories_by_wd) { - j->directories_by_wd = hashmap_new(NULL); - if (!j->directories_by_wd) - return -ENOMEM; - } - - return 0; -} - -static sd_journal *journal_new(int flags, const char *path) { - sd_journal *j; - - j = new0(sd_journal, 1); - if (!j) - return NULL; - - j->original_pid = getpid(); - j->inotify_fd = -1; - j->flags = flags; - j->data_threshold = DEFAULT_DATA_THRESHOLD; - - if (path) { - j->path = strdup(path); - if (!j->path) - goto fail; - } - - j->files = ordered_hashmap_new(&string_hash_ops); - j->directories_by_path = hashmap_new(&string_hash_ops); - j->mmap = mmap_cache_new(); - if (!j->files || !j->directories_by_path || !j->mmap) - goto fail; - - return j; - -fail: - sd_journal_close(j); - return NULL; -} - -_public_ int sd_journal_open(sd_journal **ret, int flags) { - sd_journal *j; - int r; - - assert_return(ret, -EINVAL); - assert_return((flags & ~(SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_RUNTIME_ONLY|SD_JOURNAL_SYSTEM|SD_JOURNAL_CURRENT_USER)) == 0, -EINVAL); - - j = journal_new(flags, NULL); - if (!j) - return -ENOMEM; - - r = add_search_paths(j); - if (r < 0) - goto fail; - - *ret = j; - return 0; - -fail: - sd_journal_close(j); - - return r; -} - -_public_ int sd_journal_open_container(sd_journal **ret, const char *machine, int flags) { - _cleanup_free_ char *root = NULL, *class = NULL; - sd_journal *j; - char *p; - int r; - - assert_return(machine, -EINVAL); - assert_return(ret, -EINVAL); - assert_return((flags & ~(SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM)) == 0, -EINVAL); - assert_return(machine_name_is_valid(machine), -EINVAL); - - p = strjoina("/run/systemd/machines/", machine); - r = parse_env_file(p, NEWLINE, "ROOT", &root, "CLASS", &class, NULL); - if (r == -ENOENT) - return -EHOSTDOWN; - if (r < 0) - return r; - if (!root) - return -ENODATA; - - if (!streq_ptr(class, "container")) - return -EIO; - - j = journal_new(flags, NULL); - if (!j) - return -ENOMEM; - - j->prefix = root; - root = NULL; - - r = add_search_paths(j); - if (r < 0) - goto fail; - - *ret = j; - return 0; - -fail: - sd_journal_close(j); - return r; -} - -_public_ int sd_journal_open_directory(sd_journal **ret, const char *path, int flags) { - sd_journal *j; - int r; - - assert_return(ret, -EINVAL); - assert_return(path, -EINVAL); - assert_return(flags == 0, -EINVAL); - - j = journal_new(flags, path); - if (!j) - return -ENOMEM; - - r = add_root_directory(j, path, false); - if (r < 0) - goto fail; - - *ret = j; - return 0; - -fail: - sd_journal_close(j); - - return r; -} - -_public_ int sd_journal_open_files(sd_journal **ret, const char **paths, int flags) { - sd_journal *j; - const char **path; - int r; - - assert_return(ret, -EINVAL); - assert_return(flags == 0, -EINVAL); - - j = journal_new(flags, NULL); - if (!j) - return -ENOMEM; - - STRV_FOREACH(path, paths) { - r = add_any_file(j, *path); - if (r < 0) - goto fail; - } - - j->no_new_files = true; - - *ret = j; - return 0; - -fail: - sd_journal_close(j); - - return r; -} - -_public_ void sd_journal_close(sd_journal *j) { - Directory *d; - JournalFile *f; - char *p; - - if (!j) - return; - - sd_journal_flush_matches(j); - - while ((f = ordered_hashmap_steal_first(j->files))) - journal_file_close(f); - - ordered_hashmap_free(j->files); - - while ((d = hashmap_first(j->directories_by_path))) - remove_directory(j, d); - - while ((d = hashmap_first(j->directories_by_wd))) - remove_directory(j, d); - - hashmap_free(j->directories_by_path); - hashmap_free(j->directories_by_wd); - - safe_close(j->inotify_fd); - - if (j->mmap) { - log_debug("mmap cache statistics: %u hit, %u miss", mmap_cache_get_hit(j->mmap), mmap_cache_get_missed(j->mmap)); - mmap_cache_unref(j->mmap); - } - - while ((p = hashmap_steal_first(j->errors))) - free(p); - hashmap_free(j->errors); - - free(j->path); - free(j->prefix); - free(j->unique_field); - free(j->fields_buffer); - free(j); -} - -_public_ int sd_journal_get_realtime_usec(sd_journal *j, uint64_t *ret) { - Object *o; - JournalFile *f; - int r; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(ret, -EINVAL); - - f = j->current_file; - if (!f) - return -EADDRNOTAVAIL; - - if (f->current_offset <= 0) - return -EADDRNOTAVAIL; - - r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); - if (r < 0) - return r; - - *ret = le64toh(o->entry.realtime); - return 0; -} - -_public_ int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret, sd_id128_t *ret_boot_id) { - Object *o; - JournalFile *f; - int r; - sd_id128_t id; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - f = j->current_file; - if (!f) - return -EADDRNOTAVAIL; - - if (f->current_offset <= 0) - return -EADDRNOTAVAIL; - - r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); - if (r < 0) - return r; - - if (ret_boot_id) - *ret_boot_id = o->entry.boot_id; - else { - r = sd_id128_get_boot(&id); - if (r < 0) - return r; - - if (!sd_id128_equal(id, o->entry.boot_id)) - return -ESTALE; - } - - if (ret) - *ret = le64toh(o->entry.monotonic); - - return 0; -} - -static bool field_is_valid(const char *field) { - const char *p; - - assert(field); - - if (isempty(field)) - return false; - - if (startswith(field, "__")) - return false; - - for (p = field; *p; p++) { - - if (*p == '_') - continue; - - if (*p >= 'A' && *p <= 'Z') - continue; - - if (*p >= '0' && *p <= '9') - continue; - - return false; - } - - return true; -} - -_public_ int sd_journal_get_data(sd_journal *j, const char *field, const void **data, size_t *size) { - JournalFile *f; - uint64_t i, n; - size_t field_length; - int r; - Object *o; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(field, -EINVAL); - assert_return(data, -EINVAL); - assert_return(size, -EINVAL); - assert_return(field_is_valid(field), -EINVAL); - - f = j->current_file; - if (!f) - return -EADDRNOTAVAIL; - - if (f->current_offset <= 0) - return -EADDRNOTAVAIL; - - r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); - if (r < 0) - return r; - - field_length = strlen(field); - - n = journal_file_entry_n_items(o); - for (i = 0; i < n; i++) { - uint64_t p, l; - le64_t le_hash; - size_t t; - int compression; - - p = le64toh(o->entry.items[i].object_offset); - le_hash = o->entry.items[i].hash; - r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); - if (r < 0) - return r; - - if (le_hash != o->data.hash) - return -EBADMSG; - - l = le64toh(o->object.size) - offsetof(Object, data.payload); - - compression = o->object.flags & OBJECT_COMPRESSION_MASK; - if (compression) { -#if defined(HAVE_XZ) || defined(HAVE_LZ4) - r = decompress_startswith(compression, - o->data.payload, l, - &f->compress_buffer, &f->compress_buffer_size, - field, field_length, '='); - if (r < 0) - log_debug_errno(r, "Cannot decompress %s object of length %zu at offset "OFSfmt": %m", - object_compressed_to_string(compression), l, p); - else if (r > 0) { - - size_t rsize; - - r = decompress_blob(compression, - o->data.payload, l, - &f->compress_buffer, &f->compress_buffer_size, &rsize, - j->data_threshold); - if (r < 0) - return r; - - *data = f->compress_buffer; - *size = (size_t) rsize; - - return 0; - } -#else - return -EPROTONOSUPPORT; -#endif - } else if (l >= field_length+1 && - memcmp(o->data.payload, field, field_length) == 0 && - o->data.payload[field_length] == '=') { - - t = (size_t) l; - - if ((uint64_t) t != l) - return -E2BIG; - - *data = o->data.payload; - *size = t; - - return 0; - } - - r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); - if (r < 0) - return r; - } - - return -ENOENT; -} - -static int return_data(sd_journal *j, JournalFile *f, Object *o, const void **data, size_t *size) { - size_t t; - uint64_t l; - int compression; - - l = le64toh(o->object.size) - offsetof(Object, data.payload); - t = (size_t) l; - - /* We can't read objects larger than 4G on a 32bit machine */ - if ((uint64_t) t != l) - return -E2BIG; - - compression = o->object.flags & OBJECT_COMPRESSION_MASK; - if (compression) { -#if defined(HAVE_XZ) || defined(HAVE_LZ4) - size_t rsize; - int r; - - r = decompress_blob(compression, - o->data.payload, l, &f->compress_buffer, - &f->compress_buffer_size, &rsize, j->data_threshold); - if (r < 0) - return r; - - *data = f->compress_buffer; - *size = (size_t) rsize; -#else - return -EPROTONOSUPPORT; -#endif - } else { - *data = o->data.payload; - *size = t; - } - - return 0; -} - -_public_ int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *size) { - JournalFile *f; - uint64_t p, n; - le64_t le_hash; - int r; - Object *o; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(data, -EINVAL); - assert_return(size, -EINVAL); - - f = j->current_file; - if (!f) - return -EADDRNOTAVAIL; - - if (f->current_offset <= 0) - return -EADDRNOTAVAIL; - - r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); - if (r < 0) - return r; - - n = journal_file_entry_n_items(o); - if (j->current_field >= n) - return 0; - - p = le64toh(o->entry.items[j->current_field].object_offset); - le_hash = o->entry.items[j->current_field].hash; - r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); - if (r < 0) - return r; - - if (le_hash != o->data.hash) - return -EBADMSG; - - r = return_data(j, f, o, data, size); - if (r < 0) - return r; - - j->current_field ++; - - return 1; -} - -_public_ void sd_journal_restart_data(sd_journal *j) { - if (!j) - return; - - j->current_field = 0; -} - -_public_ int sd_journal_get_fd(sd_journal *j) { - int r; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - if (j->inotify_fd >= 0) - return j->inotify_fd; - - r = allocate_inotify(j); - if (r < 0) - return r; - - /* Iterate through all dirs again, to add them to the - * inotify */ - if (j->no_new_files) - r = add_current_paths(j); - else if (j->path) - r = add_root_directory(j, j->path, true); - else - r = add_search_paths(j); - if (r < 0) - return r; - - return j->inotify_fd; -} - -_public_ int sd_journal_get_events(sd_journal *j) { - int fd; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - fd = sd_journal_get_fd(j); - if (fd < 0) - return fd; - - return POLLIN; -} - -_public_ int sd_journal_get_timeout(sd_journal *j, uint64_t *timeout_usec) { - int fd; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(timeout_usec, -EINVAL); - - fd = sd_journal_get_fd(j); - if (fd < 0) - return fd; - - if (!j->on_network) { - *timeout_usec = (uint64_t) -1; - return 0; - } - - /* If we are on the network we need to regularly check for - * changes manually */ - - *timeout_usec = j->last_process_usec + JOURNAL_FILES_RECHECK_USEC; - return 1; -} - -static void process_inotify_event(sd_journal *j, struct inotify_event *e) { - Directory *d; - - assert(j); - assert(e); - - /* Is this a subdirectory we watch? */ - d = hashmap_get(j->directories_by_wd, INT_TO_PTR(e->wd)); - if (d) { - sd_id128_t id; - - if (!(e->mask & IN_ISDIR) && e->len > 0 && - (endswith(e->name, ".journal") || - endswith(e->name, ".journal~"))) { - - /* Event for a journal file */ - - if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) - (void) add_file(j, d->path, e->name); - else if (e->mask & (IN_DELETE|IN_MOVED_FROM|IN_UNMOUNT)) - remove_file(j, d->path, e->name); - - } else if (!d->is_root && e->len == 0) { - - /* Event for a subdirectory */ - - if (e->mask & (IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT)) - remove_directory(j, d); - - } else if (d->is_root && (e->mask & IN_ISDIR) && e->len > 0 && sd_id128_from_string(e->name, &id) >= 0) { - - /* Event for root directory */ - - if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) - (void) add_directory(j, d->path, e->name); - } - - return; - } - - if (e->mask & IN_IGNORED) - return; - - log_debug("Unknown inotify event."); -} - -static int determine_change(sd_journal *j) { - bool b; - - assert(j); - - b = j->current_invalidate_counter != j->last_invalidate_counter; - j->last_invalidate_counter = j->current_invalidate_counter; - - return b ? SD_JOURNAL_INVALIDATE : SD_JOURNAL_APPEND; -} - -_public_ int sd_journal_process(sd_journal *j) { - bool got_something = false; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - j->last_process_usec = now(CLOCK_MONOTONIC); - - for (;;) { - union inotify_event_buffer buffer; - struct inotify_event *e; - ssize_t l; - - l = read(j->inotify_fd, &buffer, sizeof(buffer)); - if (l < 0) { - if (errno == EAGAIN || errno == EINTR) - return got_something ? determine_change(j) : SD_JOURNAL_NOP; - - return -errno; - } - - got_something = true; - - FOREACH_INOTIFY_EVENT(e, buffer, l) - process_inotify_event(j, e); - } -} - -_public_ int sd_journal_wait(sd_journal *j, uint64_t timeout_usec) { - int r; - uint64_t t; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - if (j->inotify_fd < 0) { - - /* This is the first invocation, hence create the - * inotify watch */ - r = sd_journal_get_fd(j); - if (r < 0) - return r; - - /* The journal might have changed since the context - * object was created and we weren't watching before, - * hence don't wait for anything, and return - * immediately. */ - return determine_change(j); - } - - r = sd_journal_get_timeout(j, &t); - if (r < 0) - return r; - - if (t != (uint64_t) -1) { - usec_t n; - - n = now(CLOCK_MONOTONIC); - t = t > n ? t - n : 0; - - if (timeout_usec == (uint64_t) -1 || timeout_usec > t) - timeout_usec = t; - } - - do { - r = fd_wait_for_event(j->inotify_fd, POLLIN, timeout_usec); - } while (r == -EINTR); - - if (r < 0) - return r; - - return sd_journal_process(j); -} - -_public_ int sd_journal_get_cutoff_realtime_usec(sd_journal *j, uint64_t *from, uint64_t *to) { - Iterator i; - JournalFile *f; - bool first = true; - uint64_t fmin = 0, tmax = 0; - int r; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(from || to, -EINVAL); - assert_return(from != to, -EINVAL); - - ORDERED_HASHMAP_FOREACH(f, j->files, i) { - usec_t fr, t; - - r = journal_file_get_cutoff_realtime_usec(f, &fr, &t); - if (r == -ENOENT) - continue; - if (r < 0) - return r; - if (r == 0) - continue; - - if (first) { - fmin = fr; - tmax = t; - first = false; - } else { - fmin = MIN(fr, fmin); - tmax = MAX(t, tmax); - } - } - - if (from) - *from = fmin; - if (to) - *to = tmax; - - return first ? 0 : 1; -} - -_public_ int sd_journal_get_cutoff_monotonic_usec(sd_journal *j, sd_id128_t boot_id, uint64_t *from, uint64_t *to) { - Iterator i; - JournalFile *f; - bool found = false; - int r; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(from || to, -EINVAL); - assert_return(from != to, -EINVAL); - - ORDERED_HASHMAP_FOREACH(f, j->files, i) { - usec_t fr, t; - - r = journal_file_get_cutoff_monotonic_usec(f, boot_id, &fr, &t); - if (r == -ENOENT) - continue; - if (r < 0) - return r; - if (r == 0) - continue; - - if (found) { - if (from) - *from = MIN(fr, *from); - if (to) - *to = MAX(t, *to); - } else { - if (from) - *from = fr; - if (to) - *to = t; - found = true; - } - } - - return found; -} - -void journal_print_header(sd_journal *j) { - Iterator i; - JournalFile *f; - bool newline = false; - - assert(j); - - ORDERED_HASHMAP_FOREACH(f, j->files, i) { - if (newline) - putchar('\n'); - else - newline = true; - - journal_file_print_header(f); - } -} - -_public_ int sd_journal_get_usage(sd_journal *j, uint64_t *bytes) { - Iterator i; - JournalFile *f; - uint64_t sum = 0; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(bytes, -EINVAL); - - ORDERED_HASHMAP_FOREACH(f, j->files, i) { - struct stat st; - - if (fstat(f->fd, &st) < 0) - return -errno; - - sum += (uint64_t) st.st_blocks * 512ULL; - } - - *bytes = sum; - return 0; -} - -_public_ int sd_journal_query_unique(sd_journal *j, const char *field) { - char *f; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(!isempty(field), -EINVAL); - assert_return(field_is_valid(field), -EINVAL); - - f = strdup(field); - if (!f) - return -ENOMEM; - - free(j->unique_field); - j->unique_field = f; - j->unique_file = NULL; - j->unique_offset = 0; - j->unique_file_lost = false; - - return 0; -} - -_public_ int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_t *l) { - size_t k; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(data, -EINVAL); - assert_return(l, -EINVAL); - assert_return(j->unique_field, -EINVAL); - - k = strlen(j->unique_field); - - if (!j->unique_file) { - if (j->unique_file_lost) - return 0; - - j->unique_file = ordered_hashmap_first(j->files); - if (!j->unique_file) - return 0; - - j->unique_offset = 0; - } - - for (;;) { - JournalFile *of; - Iterator i; - Object *o; - const void *odata; - size_t ol; - bool found; - int r; - - /* Proceed to next data object in the field's linked list */ - if (j->unique_offset == 0) { - r = journal_file_find_field_object(j->unique_file, j->unique_field, k, &o, NULL); - if (r < 0) - return r; - - j->unique_offset = r > 0 ? le64toh(o->field.head_data_offset) : 0; - } else { - r = journal_file_move_to_object(j->unique_file, OBJECT_DATA, j->unique_offset, &o); - if (r < 0) - return r; - - j->unique_offset = le64toh(o->data.next_field_offset); - } - - /* We reached the end of the list? Then start again, with the next file */ - if (j->unique_offset == 0) { - j->unique_file = ordered_hashmap_next(j->files, j->unique_file->path); - if (!j->unique_file) - return 0; - - continue; - } - - /* We do not use OBJECT_DATA context here, but OBJECT_UNUSED - * instead, so that we can look at this data object at the same - * time as one on another file */ - r = journal_file_move_to_object(j->unique_file, OBJECT_UNUSED, j->unique_offset, &o); - if (r < 0) - return r; - - /* Let's do the type check by hand, since we used 0 context above. */ - if (o->object.type != OBJECT_DATA) { - log_debug("%s:offset " OFSfmt ": object has type %d, expected %d", - j->unique_file->path, j->unique_offset, - o->object.type, OBJECT_DATA); - return -EBADMSG; - } - - r = return_data(j, j->unique_file, o, &odata, &ol); - if (r < 0) - return r; - - /* Check if we have at least the field name and "=". */ - if (ol <= k) { - log_debug("%s:offset " OFSfmt ": object has size %zu, expected at least %zu", - j->unique_file->path, j->unique_offset, - ol, k + 1); - return -EBADMSG; - } - - if (memcmp(odata, j->unique_field, k) || ((const char*) odata)[k] != '=') { - log_debug("%s:offset " OFSfmt ": object does not start with \"%s=\"", - j->unique_file->path, j->unique_offset, - j->unique_field); - return -EBADMSG; - } - - /* OK, now let's see if we already returned this data - * object by checking if it exists in the earlier - * traversed files. */ - found = false; - ORDERED_HASHMAP_FOREACH(of, j->files, i) { - if (of == j->unique_file) - break; - - /* Skip this file it didn't have any fields indexed */ - if (JOURNAL_HEADER_CONTAINS(of->header, n_fields) && le64toh(of->header->n_fields) <= 0) - continue; - - r = journal_file_find_data_object_with_hash(of, odata, ol, le64toh(o->data.hash), NULL, NULL); - if (r < 0) - return r; - if (r > 0) { - found = true; - break; - } - } - - if (found) - continue; - - r = return_data(j, j->unique_file, o, data, l); - if (r < 0) - return r; - - return 1; - } -} - -_public_ void sd_journal_restart_unique(sd_journal *j) { - if (!j) - return; - - j->unique_file = NULL; - j->unique_offset = 0; - j->unique_file_lost = false; -} - -_public_ int sd_journal_enumerate_fields(sd_journal *j, const char **field) { - int r; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(field, -EINVAL); - - if (!j->fields_file) { - if (j->fields_file_lost) - return 0; - - j->fields_file = ordered_hashmap_first(j->files); - if (!j->fields_file) - return 0; - - j->fields_hash_table_index = 0; - j->fields_offset = 0; - } - - for (;;) { - JournalFile *f, *of; - Iterator i; - uint64_t m; - Object *o; - size_t sz; - bool found; - - f = j->fields_file; - - if (j->fields_offset == 0) { - bool eof = false; - - /* We are not yet positioned at any field. Let's pick the first one */ - r = journal_file_map_field_hash_table(f); - if (r < 0) - return r; - - m = le64toh(f->header->field_hash_table_size) / sizeof(HashItem); - for (;;) { - if (j->fields_hash_table_index >= m) { - /* Reached the end of the hash table, go to the next file. */ - eof = true; - break; - } - - j->fields_offset = le64toh(f->field_hash_table[j->fields_hash_table_index].head_hash_offset); - - if (j->fields_offset != 0) - break; - - /* Empty hash table bucket, go to next one */ - j->fields_hash_table_index++; - } - - if (eof) { - /* Proceed with next file */ - j->fields_file = ordered_hashmap_next(j->files, f->path); - if (!j->fields_file) { - *field = NULL; - return 0; - } - - j->fields_offset = 0; - j->fields_hash_table_index = 0; - continue; - } - - } else { - /* We are already positioned at a field. If so, let's figure out the next field from it */ - - r = journal_file_move_to_object(f, OBJECT_FIELD, j->fields_offset, &o); - if (r < 0) - return r; - - j->fields_offset = le64toh(o->field.next_hash_offset); - if (j->fields_offset == 0) { - /* Reached the end of the hash table chain */ - j->fields_hash_table_index++; - continue; - } - } - - /* We use OBJECT_UNUSED here, so that the iterator below doesn't remove our mmap window */ - r = journal_file_move_to_object(f, OBJECT_UNUSED, j->fields_offset, &o); - if (r < 0) - return r; - - /* Because we used OBJECT_UNUSED above, we need to do our type check manually */ - if (o->object.type != OBJECT_FIELD) { - log_debug("%s:offset " OFSfmt ": object has type %i, expected %i", f->path, j->fields_offset, o->object.type, OBJECT_FIELD); - return -EBADMSG; - } - - sz = le64toh(o->object.size) - offsetof(Object, field.payload); - - /* Let's see if we already returned this field name before. */ - found = false; - ORDERED_HASHMAP_FOREACH(of, j->files, i) { - if (of == f) - break; - - /* Skip this file it didn't have any fields indexed */ - if (JOURNAL_HEADER_CONTAINS(of->header, n_fields) && le64toh(of->header->n_fields) <= 0) - continue; - - r = journal_file_find_field_object_with_hash(of, o->field.payload, sz, le64toh(o->field.hash), NULL, NULL); - if (r < 0) - return r; - if (r > 0) { - found = true; - break; - } - } - - if (found) - continue; - - /* Check if this is really a valid string containing no NUL byte */ - if (memchr(o->field.payload, 0, sz)) - return -EBADMSG; - - if (sz > j->data_threshold) - sz = j->data_threshold; - - if (!GREEDY_REALLOC(j->fields_buffer, j->fields_buffer_allocated, sz + 1)) - return -ENOMEM; - - memcpy(j->fields_buffer, o->field.payload, sz); - j->fields_buffer[sz] = 0; - - if (!field_is_valid(j->fields_buffer)) - return -EBADMSG; - - *field = j->fields_buffer; - return 1; - } -} - -_public_ void sd_journal_restart_fields(sd_journal *j) { - if (!j) - return; - - j->fields_file = NULL; - j->fields_hash_table_index = 0; - j->fields_offset = 0; - j->fields_file_lost = false; -} - -_public_ int sd_journal_reliable_fd(sd_journal *j) { - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - return !j->on_network; -} - -static char *lookup_field(const char *field, void *userdata) { - sd_journal *j = userdata; - const void *data; - size_t size, d; - int r; - - assert(field); - assert(j); - - r = sd_journal_get_data(j, field, &data, &size); - if (r < 0 || - size > REPLACE_VAR_MAX) - return strdup(field); - - d = strlen(field) + 1; - - return strndup((const char*) data + d, size - d); -} - -_public_ int sd_journal_get_catalog(sd_journal *j, char **ret) { - const void *data; - size_t size; - sd_id128_t id; - _cleanup_free_ char *text = NULL, *cid = NULL; - char *t; - int r; - - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(ret, -EINVAL); - - r = sd_journal_get_data(j, "MESSAGE_ID", &data, &size); - if (r < 0) - return r; - - cid = strndup((const char*) data + 11, size - 11); - if (!cid) - return -ENOMEM; - - r = sd_id128_from_string(cid, &id); - if (r < 0) - return r; - - r = catalog_get(CATALOG_DATABASE, id, &text); - if (r < 0) - return r; - - t = replace_var(text, lookup_field, j); - if (!t) - return -ENOMEM; - - *ret = t; - return 0; -} - -_public_ int sd_journal_get_catalog_for_message_id(sd_id128_t id, char **ret) { - assert_return(ret, -EINVAL); - - return catalog_get(CATALOG_DATABASE, id, ret); -} - -_public_ int sd_journal_set_data_threshold(sd_journal *j, size_t sz) { - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - - j->data_threshold = sz; - return 0; -} - -_public_ int sd_journal_get_data_threshold(sd_journal *j, size_t *sz) { - assert_return(j, -EINVAL); - assert_return(!journal_pid_changed(j), -ECHILD); - assert_return(sz, -EINVAL); - - *sz = j->data_threshold; - return 0; -} - -_public_ int sd_journal_has_runtime_files(sd_journal *j) { - assert_return(j, -EINVAL); - - return j->has_runtime_files; -} - -_public_ int sd_journal_has_persistent_files(sd_journal *j) { - assert_return(j, -EINVAL); - - return j->has_persistent_files; -} |