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-rw-r--r--src/journal/journal-file.c2078
1 files changed, 2078 insertions, 0 deletions
diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
new file mode 100644
index 0000000000..190bfb996b
--- /dev/null
+++ b/src/journal/journal-file.c
@@ -0,0 +1,2078 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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 General Public License as published by
+ the Free Software Foundation; either version 2 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/mman.h>
+#include <errno.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include <sys/statvfs.h>
+#include <fcntl.h>
+#include <stddef.h>
+
+#include "journal-def.h"
+#include "journal-file.h"
+#include "lookup3.h"
+#include "compress.h"
+
+#define DEFAULT_DATA_HASH_TABLE_SIZE (2047ULL*16ULL)
+#define DEFAULT_FIELD_HASH_TABLE_SIZE (2047ULL*16ULL)
+
+#define DEFAULT_WINDOW_SIZE (128ULL*1024ULL*1024ULL)
+
+#define COMPRESSION_SIZE_THRESHOLD (64ULL)
+
+static const char signature[] = { 'L', 'P', 'K', 'S', 'H', 'H', 'R', 'H' };
+
+#define ALIGN64(x) (((x) + 7ULL) & ~7ULL)
+
+void journal_file_close(JournalFile *f) {
+ int t;
+
+ assert(f);
+
+ if (f->header && f->writable)
+ f->header->state = STATE_OFFLINE;
+
+
+ for (t = 0; t < _WINDOW_MAX; t++)
+ if (f->windows[t].ptr)
+ munmap(f->windows[t].ptr, f->windows[t].size);
+
+ if (f->fd >= 0)
+ close_nointr_nofail(f->fd);
+
+ free(f->path);
+
+#ifdef HAVE_XZ
+ free(f->compress_buffer);
+#endif
+
+ free(f);
+}
+
+static int journal_file_init_header(JournalFile *f, JournalFile *template) {
+ Header h;
+ ssize_t k;
+ int r;
+
+ assert(f);
+
+ zero(h);
+ memcpy(h.signature, signature, 8);
+ h.arena_offset = htole64(ALIGN64(sizeof(h)));
+
+ r = sd_id128_randomize(&h.file_id);
+ if (r < 0)
+ return r;
+
+ if (template) {
+ h.seqnum_id = template->header->seqnum_id;
+ h.seqnum = template->header->seqnum;
+ } else
+ h.seqnum_id = h.file_id;
+
+ k = pwrite(f->fd, &h, sizeof(h), 0);
+ if (k < 0)
+ return -errno;
+
+ if (k != sizeof(h))
+ return -EIO;
+
+ return 0;
+}
+
+static int journal_file_refresh_header(JournalFile *f) {
+ int r;
+ sd_id128_t boot_id;
+
+ assert(f);
+
+ r = sd_id128_get_machine(&f->header->machine_id);
+ if (r < 0)
+ return r;
+
+ r = sd_id128_get_boot(&boot_id);
+ if (r < 0)
+ return r;
+
+ if (sd_id128_equal(boot_id, f->header->boot_id))
+ f->tail_entry_monotonic_valid = true;
+
+ f->header->boot_id = boot_id;
+
+ f->header->state = STATE_ONLINE;
+ return 0;
+}
+
+static int journal_file_verify_header(JournalFile *f) {
+ assert(f);
+
+ if (memcmp(f->header, signature, 8))
+ return -EBADMSG;
+
+#ifdef HAVE_XZ
+ if ((le64toh(f->header->incompatible_flags) & ~HEADER_INCOMPATIBLE_COMPRESSED) != 0)
+ return -EPROTONOSUPPORT;
+#else
+ if (f->header->incompatible_flags != 0)
+ return -EPROTONOSUPPORT;
+#endif
+
+ if ((uint64_t) f->last_stat.st_size < (le64toh(f->header->arena_offset) + le64toh(f->header->arena_size)))
+ return -ENODATA;
+
+ if (f->writable) {
+ uint32_t state;
+ sd_id128_t machine_id;
+ int r;
+
+ r = sd_id128_get_machine(&machine_id);
+ if (r < 0)
+ return r;
+
+ if (!sd_id128_equal(machine_id, f->header->machine_id))
+ return -EHOSTDOWN;
+
+ state = f->header->state;
+
+ if (state == STATE_ONLINE)
+ log_debug("Journal file %s is already online. Assuming unclean closing. Ignoring.", f->path);
+ else if (state == STATE_ARCHIVED)
+ return -ESHUTDOWN;
+ else if (state != STATE_OFFLINE)
+ log_debug("Journal file %s has unknown state %u. Ignoring.", f->path, state);
+ }
+
+ return 0;
+}
+
+static int journal_file_allocate(JournalFile *f, uint64_t offset, uint64_t size) {
+ uint64_t old_size, new_size;
+
+ assert(f);
+
+ /* We assume that this file is not sparse, and we know that
+ * for sure, since we always call posix_fallocate()
+ * ourselves */
+
+ old_size =
+ le64toh(f->header->arena_offset) +
+ le64toh(f->header->arena_size);
+
+ new_size = PAGE_ALIGN(offset + size);
+ if (new_size < le64toh(f->header->arena_offset))
+ new_size = le64toh(f->header->arena_offset);
+
+ if (new_size <= old_size)
+ return 0;
+
+ if (f->metrics.max_size > 0 &&
+ new_size > f->metrics.max_size)
+ return -E2BIG;
+
+ if (new_size > f->metrics.min_size &&
+ f->metrics.keep_free > 0) {
+ struct statvfs svfs;
+
+ if (fstatvfs(f->fd, &svfs) >= 0) {
+ uint64_t available;
+
+ available = svfs.f_bfree * svfs.f_bsize;
+
+ if (available >= f->metrics.keep_free)
+ available -= f->metrics.keep_free;
+ else
+ available = 0;
+
+ if (new_size - old_size > available)
+ return -E2BIG;
+ }
+ }
+
+ /* Note that the glibc fallocate() fallback is very
+ inefficient, hence we try to minimize the allocation area
+ as we can. */
+ if (posix_fallocate(f->fd, old_size, new_size - old_size) < 0)
+ return -errno;
+
+ if (fstat(f->fd, &f->last_stat) < 0)
+ return -errno;
+
+ f->header->arena_size = new_size - htole64(f->header->arena_offset);
+
+ return 0;
+}
+
+static int journal_file_map(
+ JournalFile *f,
+ uint64_t offset,
+ uint64_t size,
+ void **_window,
+ uint64_t *_woffset,
+ uint64_t *_wsize,
+ void **ret) {
+
+ uint64_t woffset, wsize;
+ void *window;
+
+ assert(f);
+ assert(size > 0);
+ assert(ret);
+
+ woffset = offset & ~((uint64_t) page_size() - 1ULL);
+ wsize = size + (offset - woffset);
+ wsize = PAGE_ALIGN(wsize);
+
+ /* Avoid SIGBUS on invalid accesses */
+ if (woffset + wsize > (uint64_t) PAGE_ALIGN(f->last_stat.st_size))
+ return -EADDRNOTAVAIL;
+
+ window = mmap(NULL, wsize, f->prot, MAP_SHARED, f->fd, woffset);
+ if (window == MAP_FAILED)
+ return -errno;
+
+ if (_window)
+ *_window = window;
+
+ if (_woffset)
+ *_woffset = woffset;
+
+ if (_wsize)
+ *_wsize = wsize;
+
+ *ret = (uint8_t*) window + (offset - woffset);
+
+ return 0;
+}
+
+static int journal_file_move_to(JournalFile *f, int wt, uint64_t offset, uint64_t size, void **ret) {
+ void *p;
+ uint64_t delta;
+ int r;
+ Window *w;
+
+ assert(f);
+ assert(ret);
+ assert(wt >= 0);
+ assert(wt < _WINDOW_MAX);
+
+ w = f->windows + wt;
+
+ if (_likely_(w->ptr &&
+ w->offset <= offset &&
+ w->offset + w->size >= offset + size)) {
+
+ *ret = (uint8_t*) w->ptr + (offset - w->offset);
+ return 0;
+ }
+
+ if (w->ptr) {
+ if (munmap(w->ptr, w->size) < 0)
+ return -errno;
+
+ w->ptr = NULL;
+ w->size = w->offset = 0;
+ }
+
+ if (size < DEFAULT_WINDOW_SIZE) {
+ /* If the default window size is larger then what was
+ * asked for extend the mapping a bit in the hope to
+ * minimize needed remappings later on. We add half
+ * the window space before and half behind the
+ * requested mapping */
+
+ delta = PAGE_ALIGN((DEFAULT_WINDOW_SIZE - size) / 2);
+
+ if (offset < delta)
+ delta = offset;
+
+ offset -= delta;
+ size += (DEFAULT_WINDOW_SIZE - delta);
+ } else
+ delta = 0;
+
+ if (offset > (uint64_t) f->last_stat.st_size)
+ return -EADDRNOTAVAIL;
+
+ if (offset + size > (uint64_t) f->last_stat.st_size)
+ size = PAGE_ALIGN((uint64_t) f->last_stat.st_size - offset);
+
+ if (size <= 0)
+ return -EADDRNOTAVAIL;
+
+ r = journal_file_map(f,
+ offset, size,
+ &w->ptr, &w->offset, &w->size,
+ &p);
+
+ if (r < 0)
+ return r;
+
+ *ret = (uint8_t*) p + delta;
+ return 0;
+}
+
+static bool verify_hash(Object *o) {
+ uint64_t h1, h2;
+
+ assert(o);
+
+ if (o->object.type == OBJECT_DATA && !(o->object.flags & OBJECT_COMPRESSED)) {
+ h1 = le64toh(o->data.hash);
+ h2 = hash64(o->data.payload, le64toh(o->object.size) - offsetof(Object, data.payload));
+ } else if (o->object.type == OBJECT_FIELD) {
+ h1 = le64toh(o->field.hash);
+ h2 = hash64(o->field.payload, le64toh(o->object.size) - offsetof(Object, field.payload));
+ } else
+ return true;
+
+ return h1 == h2;
+}
+
+int journal_file_move_to_object(JournalFile *f, int type, uint64_t offset, Object **ret) {
+ int r;
+ void *t;
+ Object *o;
+ uint64_t s;
+
+ assert(f);
+ assert(ret);
+ assert(type < _OBJECT_TYPE_MAX);
+
+ r = journal_file_move_to(f, type >= 0 ? type : WINDOW_UNKNOWN, offset, sizeof(ObjectHeader), &t);
+ if (r < 0)
+ return r;
+
+ o = (Object*) t;
+ s = le64toh(o->object.size);
+
+ if (s < sizeof(ObjectHeader))
+ return -EBADMSG;
+
+ if (type >= 0 && o->object.type != type)
+ return -EBADMSG;
+
+ if (s > sizeof(ObjectHeader)) {
+ r = journal_file_move_to(f, o->object.type, offset, s, &t);
+ if (r < 0)
+ return r;
+
+ o = (Object*) t;
+ }
+
+ if (!verify_hash(o))
+ return -EBADMSG;
+
+ *ret = o;
+ return 0;
+}
+
+static uint64_t journal_file_seqnum(JournalFile *f, uint64_t *seqnum) {
+ uint64_t r;
+
+ assert(f);
+
+ r = le64toh(f->header->seqnum) + 1;
+
+ if (seqnum) {
+ /* If an external seqnum counter was passed, we update
+ * both the local and the external one, and set it to
+ * the maximum of both */
+
+ if (*seqnum + 1 > r)
+ r = *seqnum + 1;
+
+ *seqnum = r;
+ }
+
+ f->header->seqnum = htole64(r);
+
+ if (f->header->first_seqnum == 0)
+ f->header->first_seqnum = htole64(r);
+
+ return r;
+}
+
+static int journal_file_append_object(JournalFile *f, int type, uint64_t size, Object **ret, uint64_t *offset) {
+ int r;
+ uint64_t p;
+ Object *tail, *o;
+ void *t;
+
+ assert(f);
+ assert(size >= sizeof(ObjectHeader));
+ assert(offset);
+ assert(ret);
+
+ p = le64toh(f->header->tail_object_offset);
+ if (p == 0)
+ p = le64toh(f->header->arena_offset);
+ else {
+ r = journal_file_move_to_object(f, -1, p, &tail);
+ if (r < 0)
+ return r;
+
+ p += ALIGN64(le64toh(tail->object.size));
+ }
+
+ r = journal_file_allocate(f, p, size);
+ if (r < 0)
+ return r;
+
+ r = journal_file_move_to(f, type, p, size, &t);
+ if (r < 0)
+ return r;
+
+ o = (Object*) t;
+
+ zero(o->object);
+ o->object.type = type;
+ o->object.size = htole64(size);
+
+ f->header->tail_object_offset = htole64(p);
+ f->header->n_objects = htole64(le64toh(f->header->n_objects) + 1);
+
+ *ret = o;
+ *offset = p;
+
+ return 0;
+}
+
+static int journal_file_setup_data_hash_table(JournalFile *f) {
+ uint64_t s, p;
+ Object *o;
+ int r;
+
+ assert(f);
+
+ s = DEFAULT_DATA_HASH_TABLE_SIZE;
+ r = journal_file_append_object(f,
+ OBJECT_DATA_HASH_TABLE,
+ offsetof(Object, hash_table.items) + s,
+ &o, &p);
+ if (r < 0)
+ return r;
+
+ memset(o->hash_table.items, 0, s);
+
+ f->header->data_hash_table_offset = htole64(p + offsetof(Object, hash_table.items));
+ f->header->data_hash_table_size = htole64(s);
+
+ return 0;
+}
+
+static int journal_file_setup_field_hash_table(JournalFile *f) {
+ uint64_t s, p;
+ Object *o;
+ int r;
+
+ assert(f);
+
+ s = DEFAULT_FIELD_HASH_TABLE_SIZE;
+ r = journal_file_append_object(f,
+ OBJECT_FIELD_HASH_TABLE,
+ offsetof(Object, hash_table.items) + s,
+ &o, &p);
+ if (r < 0)
+ return r;
+
+ memset(o->hash_table.items, 0, s);
+
+ f->header->field_hash_table_offset = htole64(p + offsetof(Object, hash_table.items));
+ f->header->field_hash_table_size = htole64(s);
+
+ return 0;
+}
+
+static int journal_file_map_data_hash_table(JournalFile *f) {
+ uint64_t s, p;
+ void *t;
+ int r;
+
+ assert(f);
+
+ p = le64toh(f->header->data_hash_table_offset);
+ s = le64toh(f->header->data_hash_table_size);
+
+ r = journal_file_move_to(f,
+ WINDOW_DATA_HASH_TABLE,
+ p, s,
+ &t);
+ if (r < 0)
+ return r;
+
+ f->data_hash_table = t;
+ return 0;
+}
+
+static int journal_file_map_field_hash_table(JournalFile *f) {
+ uint64_t s, p;
+ void *t;
+ int r;
+
+ assert(f);
+
+ p = le64toh(f->header->field_hash_table_offset);
+ s = le64toh(f->header->field_hash_table_size);
+
+ r = journal_file_move_to(f,
+ WINDOW_FIELD_HASH_TABLE,
+ p, s,
+ &t);
+ if (r < 0)
+ return r;
+
+ f->field_hash_table = t;
+ return 0;
+}
+
+static int journal_file_link_data(JournalFile *f, Object *o, uint64_t offset, uint64_t hash) {
+ uint64_t p, h;
+ int r;
+
+ assert(f);
+ assert(o);
+ assert(offset > 0);
+ assert(o->object.type == OBJECT_DATA);
+
+ o->data.next_hash_offset = o->data.next_field_offset = 0;
+ o->data.entry_offset = o->data.entry_array_offset = 0;
+ o->data.n_entries = 0;
+
+ h = hash % (le64toh(f->header->data_hash_table_size) / sizeof(HashItem));
+ p = le64toh(f->data_hash_table[h].head_hash_offset);
+ if (p == 0) {
+ /* Only entry in the hash table is easy */
+ f->data_hash_table[h].head_hash_offset = htole64(offset);
+ } else {
+ /* Temporarily move back to the previous data object,
+ * to patch in pointer */
+
+ r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
+ if (r < 0)
+ return r;
+
+ o->data.next_hash_offset = htole64(offset);
+
+ r = journal_file_move_to_object(f, OBJECT_DATA, offset, &o);
+ if (r < 0)
+ return r;
+ }
+
+ f->data_hash_table[h].tail_hash_offset = htole64(offset);
+
+ return 0;
+}
+
+int journal_file_find_data_object_with_hash(
+ JournalFile *f,
+ const void *data, uint64_t size, uint64_t hash,
+ Object **ret, uint64_t *offset) {
+ uint64_t p, osize, h;
+ int r;
+
+ assert(f);
+ assert(data || size == 0);
+
+ osize = offsetof(Object, data.payload) + size;
+
+ if (f->header->data_hash_table_size == 0)
+ return -EBADMSG;
+
+ h = hash % (le64toh(f->header->data_hash_table_size) / sizeof(HashItem));
+ p = le64toh(f->data_hash_table[h].head_hash_offset);
+
+ while (p > 0) {
+ Object *o;
+
+ r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
+ if (r < 0)
+ return r;
+
+ if (le64toh(o->data.hash) != hash)
+ goto next;
+
+ if (o->object.flags & OBJECT_COMPRESSED) {
+#ifdef HAVE_XZ
+ uint64_t l, rsize;
+
+ l = le64toh(o->object.size);
+ if (l <= offsetof(Object, data.payload))
+ return -EBADMSG;
+
+ l -= offsetof(Object, data.payload);
+
+ if (!uncompress_blob(o->data.payload, l, &f->compress_buffer, &f->compress_buffer_size, &rsize))
+ return -EBADMSG;
+
+ if (rsize == size &&
+ memcmp(f->compress_buffer, data, size) == 0) {
+
+ if (ret)
+ *ret = o;
+
+ if (offset)
+ *offset = p;
+
+ return 1;
+ }
+#else
+ return -EPROTONOSUPPORT;
+#endif
+
+ } else if (le64toh(o->object.size) == osize &&
+ memcmp(o->data.payload, data, size) == 0) {
+
+ if (ret)
+ *ret = o;
+
+ if (offset)
+ *offset = p;
+
+ return 1;
+ }
+
+ next:
+ p = le64toh(o->data.next_hash_offset);
+ }
+
+ return 0;
+}
+
+int journal_file_find_data_object(
+ JournalFile *f,
+ const void *data, uint64_t size,
+ Object **ret, uint64_t *offset) {
+
+ uint64_t hash;
+
+ assert(f);
+ assert(data || size == 0);
+
+ hash = hash64(data, size);
+
+ return journal_file_find_data_object_with_hash(f,
+ data, size, hash,
+ ret, offset);
+}
+
+static int journal_file_append_data(JournalFile *f, const void *data, uint64_t size, Object **ret, uint64_t *offset) {
+ uint64_t hash, p;
+ uint64_t osize;
+ Object *o;
+ int r;
+ bool compressed = false;
+
+ assert(f);
+ assert(data || size == 0);
+
+ hash = hash64(data, size);
+
+ r = journal_file_find_data_object_with_hash(f, data, size, hash, &o, &p);
+ if (r < 0)
+ return r;
+ else if (r > 0) {
+
+ if (ret)
+ *ret = o;
+
+ if (offset)
+ *offset = p;
+
+ return 0;
+ }
+
+ osize = offsetof(Object, data.payload) + size;
+ r = journal_file_append_object(f, OBJECT_DATA, osize, &o, &p);
+ if (r < 0)
+ return r;
+
+ o->data.hash = htole64(hash);
+
+#ifdef HAVE_XZ
+ if (f->compress &&
+ size >= COMPRESSION_SIZE_THRESHOLD) {
+ uint64_t rsize;
+
+ compressed = compress_blob(data, size, o->data.payload, &rsize);
+
+ if (compressed) {
+ o->object.size = htole64(offsetof(Object, data.payload) + rsize);
+ o->object.flags |= OBJECT_COMPRESSED;
+
+ f->header->incompatible_flags = htole32(le32toh(f->header->incompatible_flags) | HEADER_INCOMPATIBLE_COMPRESSED);
+
+ log_debug("Compressed data object %lu -> %lu", (unsigned long) size, (unsigned long) rsize);
+ }
+ }
+#endif
+
+ if (!compressed)
+ memcpy(o->data.payload, data, size);
+
+ r = journal_file_link_data(f, o, p, hash);
+ if (r < 0)
+ return r;
+
+ if (ret)
+ *ret = o;
+
+ if (offset)
+ *offset = p;
+
+ return 0;
+}
+
+uint64_t journal_file_entry_n_items(Object *o) {
+ assert(o);
+ assert(o->object.type == htole64(OBJECT_ENTRY));
+
+ return (le64toh(o->object.size) - offsetof(Object, entry.items)) / sizeof(EntryItem);
+}
+
+static uint64_t journal_file_entry_array_n_items(Object *o) {
+ assert(o);
+ assert(o->object.type == htole64(OBJECT_ENTRY_ARRAY));
+
+ return (le64toh(o->object.size) - offsetof(Object, entry_array.items)) / sizeof(uint64_t);
+}
+
+static int link_entry_into_array(JournalFile *f,
+ uint64_t *first,
+ uint64_t *idx,
+ uint64_t p) {
+ int r;
+ uint64_t n = 0, ap = 0, q, i, a, hidx;
+ Object *o;
+
+ assert(f);
+ assert(first);
+ assert(idx);
+ assert(p > 0);
+
+ a = le64toh(*first);
+ i = hidx = le64toh(*idx);
+ while (a > 0) {
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o);
+ if (r < 0)
+ return r;
+
+ n = journal_file_entry_array_n_items(o);
+ if (i < n) {
+ o->entry_array.items[i] = htole64(p);
+ *idx = htole64(hidx + 1);
+ return 0;
+ }
+
+ i -= n;
+ ap = a;
+ a = le64toh(o->entry_array.next_entry_array_offset);
+ }
+
+ if (hidx > n)
+ n = (hidx+1) * 2;
+ else
+ n = n * 2;
+
+ if (n < 4)
+ n = 4;
+
+ r = journal_file_append_object(f, OBJECT_ENTRY_ARRAY,
+ offsetof(Object, entry_array.items) + n * sizeof(uint64_t),
+ &o, &q);
+ if (r < 0)
+ return r;
+
+ o->entry_array.items[i] = htole64(p);
+
+ if (ap == 0)
+ *first = q;
+ else {
+ r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, ap, &o);
+ if (r < 0)
+ return r;
+
+ o->entry_array.next_entry_array_offset = htole64(q);
+ }
+
+ *idx = htole64(hidx + 1);
+
+ return 0;
+}
+
+static int link_entry_into_array_plus_one(JournalFile *f,
+ uint64_t *extra,
+ uint64_t *first,
+ uint64_t *idx,
+ uint64_t p) {
+
+ int r;
+
+ assert(f);
+ assert(extra);
+ assert(first);
+ assert(idx);
+ assert(p > 0);
+
+ if (*idx == 0)
+ *extra = htole64(p);
+ else {
+ uint64_t i;
+
+ i = le64toh(*idx) - 1;
+ r = link_entry_into_array(f, first, &i, p);
+ if (r < 0)
+ return r;
+ }
+
+ *idx = htole64(le64toh(*idx) + 1);
+ return 0;
+}
+
+static int journal_file_link_entry_item(JournalFile *f, Object *o, uint64_t offset, uint64_t i) {
+ uint64_t p;
+ int r;
+ assert(f);
+ assert(o);
+ assert(offset > 0);
+
+ p = le64toh(o->entry.items[i].object_offset);
+ if (p == 0)
+ return -EINVAL;
+
+ r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
+ if (r < 0)
+ return r;
+
+ return link_entry_into_array_plus_one(f,
+ &o->data.entry_offset,
+ &o->data.entry_array_offset,
+ &o->data.n_entries,
+ offset);
+}
+
+static int journal_file_link_entry(JournalFile *f, Object *o, uint64_t offset) {
+ uint64_t n, i;
+ int r;
+
+ assert(f);
+ assert(o);
+ assert(offset > 0);
+ assert(o->object.type == OBJECT_ENTRY);
+
+ /* Link up the entry itself */
+ r = link_entry_into_array(f,
+ &f->header->entry_array_offset,
+ &f->header->n_entries,
+ offset);
+ if (r < 0)
+ return r;
+
+ log_error("=> %s seqnr=%lu n_entries=%lu", f->path, (unsigned long) o->entry.seqnum, (unsigned long) f->header->n_entries);
+
+ if (f->header->head_entry_realtime == 0)
+ f->header->head_entry_realtime = o->entry.realtime;
+
+ f->header->tail_entry_realtime = o->entry.realtime;
+ f->header->tail_entry_monotonic = o->entry.monotonic;
+
+ f->tail_entry_monotonic_valid = true;
+
+ /* Link up the items */
+ n = journal_file_entry_n_items(o);
+ for (i = 0; i < n; i++) {
+ r = journal_file_link_entry_item(f, o, offset, i);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int journal_file_append_entry_internal(
+ JournalFile *f,
+ const dual_timestamp *ts,
+ uint64_t xor_hash,
+ const EntryItem items[], unsigned n_items,
+ uint64_t *seqnum,
+ Object **ret, uint64_t *offset) {
+ uint64_t np;
+ uint64_t osize;
+ Object *o;
+ int r;
+
+ assert(f);
+ assert(items || n_items == 0);
+ assert(ts);
+
+ osize = offsetof(Object, entry.items) + (n_items * sizeof(EntryItem));
+
+ r = journal_file_append_object(f, OBJECT_ENTRY, osize, &o, &np);
+ if (r < 0)
+ return r;
+
+ o->entry.seqnum = htole64(journal_file_seqnum(f, seqnum));
+ memcpy(o->entry.items, items, n_items * sizeof(EntryItem));
+ o->entry.realtime = htole64(ts->realtime);
+ o->entry.monotonic = htole64(ts->monotonic);
+ o->entry.xor_hash = htole64(xor_hash);
+ o->entry.boot_id = f->header->boot_id;
+
+ r = journal_file_link_entry(f, o, np);
+ if (r < 0)
+ return r;
+
+ if (ret)
+ *ret = o;
+
+ if (offset)
+ *offset = np;
+
+ return 0;
+}
+
+void journal_file_post_change(JournalFile *f) {
+ assert(f);
+
+ /* inotify() does not receive IN_MODIFY events from file
+ * accesses done via mmap(). After each access we hence
+ * trigger IN_MODIFY by truncating the journal file to its
+ * current size which triggers IN_MODIFY. */
+
+ __sync_synchronize();
+
+ if (ftruncate(f->fd, f->last_stat.st_size) < 0)
+ log_error("Failed to to truncate file to its own size: %m");
+}
+
+int journal_file_append_entry(JournalFile *f, const dual_timestamp *ts, const struct iovec iovec[], unsigned n_iovec, uint64_t *seqnum, Object **ret, uint64_t *offset) {
+ unsigned i;
+ EntryItem *items;
+ int r;
+ uint64_t xor_hash = 0;
+ struct dual_timestamp _ts;
+
+ assert(f);
+ assert(iovec || n_iovec == 0);
+
+ if (!f->writable)
+ return -EPERM;
+
+ if (!ts) {
+ dual_timestamp_get(&_ts);
+ ts = &_ts;
+ }
+
+ if (f->tail_entry_monotonic_valid &&
+ ts->monotonic < le64toh(f->header->tail_entry_monotonic))
+ return -EINVAL;
+
+ if (ts->realtime < le64toh(f->header->tail_entry_realtime))
+ return -EINVAL;
+
+ items = alloca(sizeof(EntryItem) * n_iovec);
+
+ for (i = 0; i < n_iovec; i++) {
+ uint64_t p;
+ Object *o;
+
+ r = journal_file_append_data(f, iovec[i].iov_base, iovec[i].iov_len, &o, &p);
+ if (r < 0)
+ return r;
+
+ xor_hash ^= le64toh(o->data.hash);
+ items[i].object_offset = htole64(p);
+ items[i].hash = o->data.hash;
+ }
+
+ r = journal_file_append_entry_internal(f, ts, xor_hash, items, n_iovec, seqnum, ret, offset);
+
+ journal_file_post_change(f);
+
+ return r;
+}
+
+static int generic_array_get(JournalFile *f,
+ uint64_t first,
+ uint64_t i,
+ Object **ret, uint64_t *offset) {
+
+ Object *o;
+ uint64_t p, a;
+ int r;
+
+ assert(f);
+
+ a = first;
+ while (a > 0) {
+ uint64_t n;
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o);
+ if (r < 0)
+ return r;
+
+ n = journal_file_entry_array_n_items(o);
+ if (i < n) {
+ p = le64toh(o->entry_array.items[i]);
+ break;
+ }
+
+ i -= n;
+ a = le64toh(o->entry_array.next_entry_array_offset);
+ }
+
+ if (a <= 0 || p <= 0)
+ return 0;
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o);
+ if (r < 0)
+ return r;
+
+ if (ret)
+ *ret = o;
+
+ if (offset)
+ *offset = p;
+
+ return 1;
+}
+
+static int generic_array_get_plus_one(JournalFile *f,
+ uint64_t extra,
+ uint64_t first,
+ uint64_t i,
+ Object **ret, uint64_t *offset) {
+
+ Object *o;
+
+ assert(f);
+
+ if (i == 0) {
+ int r;
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY, extra, &o);
+ if (r < 0)
+ return r;
+
+ if (ret)
+ *ret = o;
+
+ if (offset)
+ *offset = extra;
+
+ return 1;
+ }
+
+ return generic_array_get(f, first, i-1, ret, offset);
+}
+
+enum {
+ TEST_FOUND,
+ TEST_LEFT,
+ TEST_RIGHT
+};
+
+static int generic_array_bisect(JournalFile *f,
+ uint64_t first,
+ uint64_t n,
+ uint64_t needle,
+ int (*test_object)(JournalFile *f, uint64_t p, uint64_t needle),
+ direction_t direction,
+ Object **ret,
+ uint64_t *offset,
+ uint64_t *idx) {
+
+ uint64_t a, p, t = 0, i = 0, last_p = 0;
+ bool subtract_one = false;
+ Object *o, *array = NULL;
+ int r;
+
+ assert(f);
+ assert(test_object);
+
+ a = first;
+ while (a > 0) {
+ uint64_t left, right, k, lp;
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &array);
+ if (r < 0)
+ return r;
+
+ k = journal_file_entry_array_n_items(array);
+ right = MIN(k, n);
+ if (right <= 0)
+ return 0;
+
+ i = right - 1;
+ lp = p = le64toh(array->entry_array.items[i]);
+ if (p <= 0)
+ return -EBADMSG;
+
+ r = test_object(f, p, needle);
+ if (r < 0)
+ return r;
+
+ if (r == TEST_FOUND)
+ r = direction == DIRECTION_DOWN ? TEST_RIGHT : TEST_LEFT;
+
+ if (r == TEST_RIGHT) {
+ left = 0;
+ right -= 1;
+ for (;;) {
+ if (left == right) {
+ if (direction == DIRECTION_UP)
+ subtract_one = true;
+
+ i = left;
+ goto found;
+ }
+
+ assert(left < right);
+
+ i = (left + right) / 2;
+ p = le64toh(array->entry_array.items[i]);
+ if (p <= 0)
+ return -EBADMSG;
+
+ r = test_object(f, p, needle);
+ if (r < 0)
+ return r;
+
+ if (r == TEST_FOUND)
+ r = direction == DIRECTION_DOWN ? TEST_RIGHT : TEST_LEFT;
+
+ if (r == TEST_RIGHT)
+ right = i;
+ else
+ left = i + 1;
+ }
+ }
+
+ if (k > n)
+ return 0;
+
+ last_p = lp;
+
+ n -= k;
+ t += k;
+ a = le64toh(array->entry_array.next_entry_array_offset);
+ }
+
+ return 0;
+
+found:
+ if (subtract_one && t == 0 && i == 0)
+ return 0;
+
+ if (subtract_one && i == 0)
+ p = last_p;
+ else if (subtract_one)
+ p = le64toh(array->entry_array.items[i-1]);
+ else
+ p = le64toh(array->entry_array.items[i]);
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o);
+ if (r < 0)
+ return r;
+
+ if (ret)
+ *ret = o;
+
+ if (offset)
+ *offset = p;
+
+ if (idx)
+ *idx = t + i - (subtract_one ? 1 : 0);
+
+ return 1;
+}
+
+static int generic_array_bisect_plus_one(JournalFile *f,
+ uint64_t extra,
+ uint64_t first,
+ uint64_t n,
+ uint64_t needle,
+ int (*test_object)(JournalFile *f, uint64_t p, uint64_t needle),
+ direction_t direction,
+ Object **ret,
+ uint64_t *offset,
+ uint64_t *idx) {
+
+ int r;
+
+ assert(f);
+ assert(test_object);
+
+ if (n <= 0)
+ return 0;
+
+ /* This bisects the array in object 'first', but first checks
+ * an extra */
+ r = test_object(f, extra, needle);
+ if (r < 0)
+ return r;
+ else if (r == TEST_FOUND) {
+ Object *o;
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY, extra, &o);
+ if (r < 0)
+ return r;
+
+ if (ret)
+ *ret = o;
+
+ if (offset)
+ *offset = extra;
+
+ if (idx)
+ *idx = 0;
+
+ return 1;
+ } else if (r == TEST_RIGHT)
+ return 0;
+
+ r = generic_array_bisect(f, first, n-1, needle, test_object, direction, ret, offset, idx);
+
+ if (r > 0)
+ (*idx) ++;
+
+ return r;
+}
+
+static int test_object_seqnum(JournalFile *f, uint64_t p, uint64_t needle) {
+ Object *o;
+ int r;
+
+ assert(f);
+ assert(p > 0);
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o);
+ if (r < 0)
+ return r;
+
+ if (le64toh(o->entry.seqnum) == needle)
+ return TEST_FOUND;
+ else if (le64toh(o->entry.seqnum) < needle)
+ return TEST_LEFT;
+ else
+ return TEST_RIGHT;
+}
+
+int journal_file_move_to_entry_by_seqnum(
+ JournalFile *f,
+ uint64_t seqnum,
+ direction_t direction,
+ Object **ret,
+ uint64_t *offset) {
+
+ return generic_array_bisect(f,
+ le64toh(f->header->entry_array_offset),
+ le64toh(f->header->n_entries),
+ seqnum,
+ test_object_seqnum,
+ direction,
+ ret, offset, NULL);
+}
+
+static int test_object_realtime(JournalFile *f, uint64_t p, uint64_t needle) {
+ Object *o;
+ int r;
+
+ assert(f);
+ assert(p > 0);
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o);
+ if (r < 0)
+ return r;
+
+ if (le64toh(o->entry.realtime) == needle)
+ return TEST_FOUND;
+ else if (le64toh(o->entry.realtime) < needle)
+ return TEST_LEFT;
+ else
+ return TEST_RIGHT;
+}
+
+int journal_file_move_to_entry_by_realtime(
+ JournalFile *f,
+ uint64_t realtime,
+ direction_t direction,
+ Object **ret,
+ uint64_t *offset) {
+
+ return generic_array_bisect(f,
+ le64toh(f->header->entry_array_offset),
+ le64toh(f->header->n_entries),
+ realtime,
+ test_object_realtime,
+ direction,
+ ret, offset, NULL);
+}
+
+static int test_object_monotonic(JournalFile *f, uint64_t p, uint64_t needle) {
+ Object *o;
+ int r;
+
+ assert(f);
+ assert(p > 0);
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o);
+ if (r < 0)
+ return r;
+
+ if (le64toh(o->entry.monotonic) == needle)
+ return TEST_FOUND;
+ else if (le64toh(o->entry.monotonic) < needle)
+ return TEST_LEFT;
+ else
+ return TEST_RIGHT;
+}
+
+int journal_file_move_to_entry_by_monotonic(
+ JournalFile *f,
+ sd_id128_t boot_id,
+ uint64_t monotonic,
+ direction_t direction,
+ Object **ret,
+ uint64_t *offset) {
+
+ char t[8+32+1] = "_BOOT_ID=";
+ Object *o;
+ int r;
+
+ sd_id128_to_string(boot_id, t + 8);
+
+ r = journal_file_find_data_object(f, t, strlen(t), &o, NULL);
+ if (r < 0)
+ return r;
+ else if (r == 0)
+ return -ENOENT;
+
+ return generic_array_bisect_plus_one(f,
+ le64toh(o->data.entry_offset),
+ le64toh(o->data.entry_array_offset),
+ le64toh(o->data.n_entries),
+ monotonic,
+ test_object_monotonic,
+ direction,
+ ret, offset, NULL);
+}
+
+static int test_object_offset(JournalFile *f, uint64_t p, uint64_t needle) {
+ assert(f);
+ assert(p > 0);
+
+ if (p == needle)
+ return TEST_FOUND;
+ else if (p < needle)
+ return TEST_LEFT;
+ else
+ return TEST_RIGHT;
+}
+
+int journal_file_next_entry(
+ JournalFile *f,
+ Object *o, uint64_t p,
+ direction_t direction,
+ Object **ret, uint64_t *offset) {
+
+ uint64_t i, n;
+ int r;
+
+ assert(f);
+ assert(p > 0 || !o);
+
+ n = le64toh(f->header->n_entries);
+ if (n <= 0)
+ return 0;
+
+ if (!o)
+ i = direction == DIRECTION_DOWN ? 0 : n - 1;
+ else {
+ if (o->object.type != OBJECT_ENTRY)
+ return -EINVAL;
+
+ r = generic_array_bisect(f,
+ le64toh(f->header->entry_array_offset),
+ le64toh(f->header->n_entries),
+ p,
+ test_object_offset,
+ DIRECTION_DOWN,
+ NULL, NULL,
+ &i);
+ if (r <= 0)
+ return r;
+
+ if (direction == DIRECTION_DOWN) {
+ if (i >= n - 1)
+ return 0;
+
+ i++;
+ } else {
+ if (i <= 0)
+ return 0;
+
+ i--;
+ }
+ }
+
+ /* And jump to it */
+ return generic_array_get(f,
+ le64toh(f->header->entry_array_offset),
+ i,
+ ret, offset);
+}
+
+int journal_file_skip_entry(
+ JournalFile *f,
+ Object *o, uint64_t p,
+ int64_t skip,
+ Object **ret, uint64_t *offset) {
+
+ uint64_t i, n;
+ int r;
+
+ assert(f);
+ assert(o);
+ assert(p > 0);
+
+ if (o->object.type != OBJECT_ENTRY)
+ return -EINVAL;
+
+ r = generic_array_bisect(f,
+ le64toh(f->header->entry_array_offset),
+ le64toh(f->header->n_entries),
+ p,
+ test_object_offset,
+ DIRECTION_DOWN,
+ NULL, NULL,
+ &i);
+ if (r <= 0)
+ return r;
+
+ /* Calculate new index */
+ if (skip < 0) {
+ if ((uint64_t) -skip >= i)
+ i = 0;
+ else
+ i = i - (uint64_t) -skip;
+ } else
+ i += (uint64_t) skip;
+
+ n = le64toh(f->header->n_entries);
+ if (n <= 0)
+ return -EBADMSG;
+
+ if (i >= n)
+ i = n-1;
+
+ return generic_array_get(f,
+ le64toh(f->header->entry_array_offset),
+ i,
+ ret, offset);
+}
+
+int journal_file_next_entry_for_data(
+ JournalFile *f,
+ Object *o, uint64_t p,
+ uint64_t data_offset,
+ direction_t direction,
+ Object **ret, uint64_t *offset) {
+
+ uint64_t n, i;
+ int r;
+ Object *d;
+
+ assert(f);
+ assert(p > 0 || !o);
+
+ r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d);
+ if (r < 0)
+ return r;
+
+ n = le64toh(d->data.n_entries);
+ if (n <= 0)
+ return n;
+
+ if (!o)
+ i = direction == DIRECTION_DOWN ? 0 : n - 1;
+ else {
+ if (o->object.type != OBJECT_ENTRY)
+ return -EINVAL;
+
+ r = generic_array_bisect_plus_one(f,
+ le64toh(d->data.entry_offset),
+ le64toh(d->data.entry_array_offset),
+ le64toh(d->data.n_entries),
+ p,
+ test_object_offset,
+ DIRECTION_DOWN,
+ NULL, NULL,
+ &i);
+
+ if (r <= 0)
+ return r;
+
+ if (direction == DIRECTION_DOWN) {
+ if (i >= n - 1)
+ return 0;
+
+ i++;
+ } else {
+ if (i <= 0)
+ return 0;
+
+ i--;
+ }
+
+ }
+
+ return generic_array_get_plus_one(f,
+ le64toh(d->data.entry_offset),
+ le64toh(d->data.entry_array_offset),
+ i,
+ ret, offset);
+}
+
+int journal_file_move_to_entry_by_seqnum_for_data(
+ JournalFile *f,
+ uint64_t data_offset,
+ uint64_t seqnum,
+ direction_t direction,
+ Object **ret, uint64_t *offset) {
+
+ Object *d;
+ int r;
+
+ r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d);
+ if (r <= 0)
+ return r;
+
+ return generic_array_bisect_plus_one(f,
+ le64toh(d->data.entry_offset),
+ le64toh(d->data.entry_array_offset),
+ le64toh(d->data.n_entries),
+ seqnum,
+ test_object_seqnum,
+ direction,
+ ret, offset, NULL);
+}
+
+int journal_file_move_to_entry_by_realtime_for_data(
+ JournalFile *f,
+ uint64_t data_offset,
+ uint64_t realtime,
+ direction_t direction,
+ Object **ret, uint64_t *offset) {
+
+ Object *d;
+ int r;
+
+ r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d);
+ if (r <= 0)
+ return r;
+
+ return generic_array_bisect_plus_one(f,
+ le64toh(d->data.entry_offset),
+ le64toh(d->data.entry_array_offset),
+ le64toh(d->data.n_entries),
+ realtime,
+ test_object_realtime,
+ direction,
+ ret, offset, NULL);
+}
+
+void journal_file_dump(JournalFile *f) {
+ char a[33], b[33], c[33];
+ Object *o;
+ int r;
+ uint64_t p;
+
+ assert(f);
+
+ printf("File Path: %s\n"
+ "File ID: %s\n"
+ "Machine ID: %s\n"
+ "Boot ID: %s\n"
+ "Arena size: %llu\n"
+ "Objects: %lu\n"
+ "Entries: %lu\n",
+ f->path,
+ sd_id128_to_string(f->header->file_id, a),
+ sd_id128_to_string(f->header->machine_id, b),
+ sd_id128_to_string(f->header->boot_id, c),
+ (unsigned long long) le64toh(f->header->arena_size),
+ (unsigned long) le64toh(f->header->n_objects),
+ (unsigned long) le64toh(f->header->n_entries));
+
+ p = le64toh(f->header->arena_offset);
+ while (p != 0) {
+ r = journal_file_move_to_object(f, -1, p, &o);
+ if (r < 0)
+ goto fail;
+
+ switch (o->object.type) {
+
+ case OBJECT_UNUSED:
+ printf("Type: OBJECT_UNUSED\n");
+ break;
+
+ case OBJECT_DATA:
+ printf("Type: OBJECT_DATA\n");
+ break;
+
+ case OBJECT_ENTRY:
+ printf("Type: OBJECT_ENTRY %llu %llu %llu\n",
+ (unsigned long long) le64toh(o->entry.seqnum),
+ (unsigned long long) le64toh(o->entry.monotonic),
+ (unsigned long long) le64toh(o->entry.realtime));
+ break;
+
+ case OBJECT_FIELD_HASH_TABLE:
+ printf("Type: OBJECT_FIELD_HASH_TABLE\n");
+ break;
+
+ case OBJECT_DATA_HASH_TABLE:
+ printf("Type: OBJECT_DATA_HASH_TABLE\n");
+ break;
+
+ case OBJECT_ENTRY_ARRAY:
+ printf("Type: OBJECT_ENTRY_ARRAY\n");
+ break;
+ }
+
+ if (o->object.flags & OBJECT_COMPRESSED)
+ printf("Flags: COMPRESSED\n");
+
+ if (p == le64toh(f->header->tail_object_offset))
+ p = 0;
+ else
+ p = p + ALIGN64(le64toh(o->object.size));
+ }
+
+ return;
+fail:
+ log_error("File corrupt");
+}
+
+int journal_file_open(
+ const char *fname,
+ int flags,
+ mode_t mode,
+ JournalFile *template,
+ JournalFile **ret) {
+
+ JournalFile *f;
+ int r;
+ bool newly_created = false;
+
+ assert(fname);
+
+ if ((flags & O_ACCMODE) != O_RDONLY &&
+ (flags & O_ACCMODE) != O_RDWR)
+ return -EINVAL;
+
+ f = new0(JournalFile, 1);
+ if (!f)
+ return -ENOMEM;
+
+ f->fd = -1;
+ f->flags = flags;
+ f->mode = mode;
+ f->writable = (flags & O_ACCMODE) != O_RDONLY;
+ f->prot = prot_from_flags(flags);
+
+ f->metrics.max_size = DEFAULT_MAX_SIZE;
+ f->metrics.min_size = DEFAULT_MIN_SIZE;
+ f->metrics.keep_free = DEFAULT_KEEP_FREE;
+
+ f->path = strdup(fname);
+ if (!f->path) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ f->fd = open(f->path, f->flags|O_CLOEXEC, f->mode);
+ if (f->fd < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ if (fstat(f->fd, &f->last_stat) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ if (f->last_stat.st_size == 0 && f->writable) {
+ newly_created = true;
+
+ r = journal_file_init_header(f, template);
+ if (r < 0)
+ goto fail;
+
+ if (fstat(f->fd, &f->last_stat) < 0) {
+ r = -errno;
+ goto fail;
+ }
+ }
+
+ if (f->last_stat.st_size < (off_t) sizeof(Header)) {
+ r = -EIO;
+ goto fail;
+ }
+
+ f->header = mmap(NULL, PAGE_ALIGN(sizeof(Header)), prot_from_flags(flags), MAP_SHARED, f->fd, 0);
+ if (f->header == MAP_FAILED) {
+ f->header = NULL;
+ r = -errno;
+ goto fail;
+ }
+
+ if (!newly_created) {
+ r = journal_file_verify_header(f);
+ if (r < 0)
+ goto fail;
+ }
+
+ if (f->writable) {
+ r = journal_file_refresh_header(f);
+ if (r < 0)
+ goto fail;
+ }
+
+ if (newly_created) {
+
+ r = journal_file_setup_field_hash_table(f);
+ if (r < 0)
+ goto fail;
+
+ r = journal_file_setup_data_hash_table(f);
+ if (r < 0)
+ goto fail;
+ }
+
+ r = journal_file_map_field_hash_table(f);
+ if (r < 0)
+ goto fail;
+
+ r = journal_file_map_data_hash_table(f);
+ if (r < 0)
+ goto fail;
+
+ if (ret)
+ *ret = f;
+
+ return 0;
+
+fail:
+ journal_file_close(f);
+
+ return r;
+}
+
+int journal_file_rotate(JournalFile **f) {
+ char *p;
+ size_t l;
+ JournalFile *old_file, *new_file = NULL;
+ int r;
+
+ assert(f);
+ assert(*f);
+
+ old_file = *f;
+
+ if (!old_file->writable)
+ return -EINVAL;
+
+ if (!endswith(old_file->path, ".journal"))
+ return -EINVAL;
+
+ l = strlen(old_file->path);
+
+ p = new(char, l + 1 + 16 + 1 + 32 + 1 + 16 + 1);
+ if (!p)
+ return -ENOMEM;
+
+ memcpy(p, old_file->path, l - 8);
+ p[l-8] = '@';
+ sd_id128_to_string(old_file->header->seqnum_id, p + l - 8 + 1);
+ snprintf(p + l - 8 + 1 + 32, 1 + 16 + 1 + 16 + 8 + 1,
+ "-%016llx-%016llx.journal",
+ (unsigned long long) le64toh((*f)->header->seqnum),
+ (unsigned long long) le64toh((*f)->header->tail_entry_realtime));
+
+ r = rename(old_file->path, p);
+ free(p);
+
+ if (r < 0)
+ return -errno;
+
+ old_file->header->state = le32toh(STATE_ARCHIVED);
+
+ r = journal_file_open(old_file->path, old_file->flags, old_file->mode, old_file, &new_file);
+ journal_file_close(old_file);
+
+ *f = new_file;
+ return r;
+}
+
+struct vacuum_info {
+ off_t usage;
+ char *filename;
+
+ uint64_t realtime;
+ sd_id128_t seqnum_id;
+ uint64_t seqnum;
+};
+
+static int vacuum_compare(const void *_a, const void *_b) {
+ const struct vacuum_info *a, *b;
+
+ a = _a;
+ b = _b;
+
+ if (sd_id128_equal(a->seqnum_id, b->seqnum_id)) {
+ if (a->seqnum < b->seqnum)
+ return -1;
+ else if (a->seqnum > b->seqnum)
+ return 1;
+ else
+ return 0;
+ }
+
+ if (a->realtime < b->realtime)
+ return -1;
+ else if (a->realtime > b->realtime)
+ return 1;
+ else
+ return memcmp(&a->seqnum_id, &b->seqnum_id, 16);
+}
+
+int journal_directory_vacuum(const char *directory, uint64_t max_use, uint64_t min_free) {
+ DIR *d;
+ int r = 0;
+ struct vacuum_info *list = NULL;
+ unsigned n_list = 0, n_allocated = 0, i;
+ uint64_t sum = 0;
+
+ assert(directory);
+
+ if (max_use <= 0)
+ max_use = DEFAULT_MAX_USE;
+
+ d = opendir(directory);
+ if (!d)
+ return -errno;
+
+ for (;;) {
+ int k;
+ struct dirent buf, *de;
+ size_t q;
+ struct stat st;
+ char *p;
+ unsigned long long seqnum, realtime;
+ sd_id128_t seqnum_id;
+
+ k = readdir_r(d, &buf, &de);
+ if (k != 0) {
+ r = -k;
+ goto finish;
+ }
+
+ if (!de)
+ break;
+
+ if (!dirent_is_file_with_suffix(de, ".journal"))
+ continue;
+
+ q = strlen(de->d_name);
+
+ if (q < 1 + 32 + 1 + 16 + 1 + 16 + 8)
+ continue;
+
+ if (de->d_name[q-8-16-1] != '-' ||
+ de->d_name[q-8-16-1-16-1] != '-' ||
+ de->d_name[q-8-16-1-16-1-32-1] != '@')
+ continue;
+
+ if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
+ continue;
+
+ if (!S_ISREG(st.st_mode))
+ continue;
+
+ p = strdup(de->d_name);
+ if (!p) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ de->d_name[q-8-16-1-16-1] = 0;
+ if (sd_id128_from_string(de->d_name + q-8-16-1-16-1-32, &seqnum_id) < 0) {
+ free(p);
+ continue;
+ }
+
+ if (sscanf(de->d_name + q-8-16-1-16, "%16llx-%16llx.journal", &seqnum, &realtime) != 2) {
+ free(p);
+ continue;
+ }
+
+ if (n_list >= n_allocated) {
+ struct vacuum_info *j;
+
+ n_allocated = MAX(n_allocated * 2U, 8U);
+ j = realloc(list, n_allocated * sizeof(struct vacuum_info));
+ if (!j) {
+ free(p);
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ list = j;
+ }
+
+ list[n_list].filename = p;
+ list[n_list].usage = (uint64_t) st.st_blksize * (uint64_t) st.st_blocks;
+ list[n_list].seqnum = seqnum;
+ list[n_list].realtime = realtime;
+ list[n_list].seqnum_id = seqnum_id;
+
+ sum += list[n_list].usage;
+
+ n_list ++;
+ }
+
+ qsort(list, n_list, sizeof(struct vacuum_info), vacuum_compare);
+
+ for(i = 0; i < n_list; i++) {
+ struct statvfs ss;
+
+ if (fstatvfs(dirfd(d), &ss) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ if (sum <= max_use &&
+ (uint64_t) ss.f_bavail * (uint64_t) ss.f_bsize >= min_free)
+ break;
+
+ if (unlinkat(dirfd(d), list[i].filename, 0) >= 0) {
+ log_debug("Deleted archived journal %s/%s.", directory, list[i].filename);
+ sum -= list[i].usage;
+ } else if (errno != ENOENT)
+ log_warning("Failed to delete %s/%s: %m", directory, list[i].filename);
+ }
+
+finish:
+ for (i = 0; i < n_list; i++)
+ free(list[i].filename);
+
+ free(list);
+
+ if (d)
+ closedir(d);
+
+ return r;
+}
+
+int journal_file_copy_entry(JournalFile *from, JournalFile *to, Object *o, uint64_t p, uint64_t *seqnum, Object **ret, uint64_t *offset) {
+ uint64_t i, n;
+ uint64_t q, xor_hash = 0;
+ int r;
+ EntryItem *items;
+ dual_timestamp ts;
+
+ assert(from);
+ assert(to);
+ assert(o);
+ assert(p);
+
+ if (!to->writable)
+ return -EPERM;
+
+ ts.monotonic = le64toh(o->entry.monotonic);
+ ts.realtime = le64toh(o->entry.realtime);
+
+ if (to->tail_entry_monotonic_valid &&
+ ts.monotonic < le64toh(to->header->tail_entry_monotonic))
+ return -EINVAL;
+
+ if (ts.realtime < le64toh(to->header->tail_entry_realtime))
+ return -EINVAL;
+
+ n = journal_file_entry_n_items(o);
+ items = alloca(sizeof(EntryItem) * n);
+
+ for (i = 0; i < n; i++) {
+ uint64_t le_hash, l, h;
+ size_t t;
+ void *data;
+ Object *u;
+
+ q = le64toh(o->entry.items[i].object_offset);
+ le_hash = o->entry.items[i].hash;
+
+ r = journal_file_move_to_object(from, OBJECT_DATA, q, &o);
+ if (r < 0)
+ return r;
+
+ if (le_hash != o->data.hash)
+ return -EBADMSG;
+
+ l = le64toh(o->object.size) - offsetof(Object, data.payload);
+ t = (size_t) l;
+
+ /* We hit the limit on 32bit machines */
+ if ((uint64_t) t != l)
+ return -E2BIG;
+
+ if (o->object.flags & OBJECT_COMPRESSED) {
+#ifdef HAVE_XZ
+ uint64_t rsize;
+
+ if (!uncompress_blob(o->data.payload, l, &from->compress_buffer, &from->compress_buffer_size, &rsize))
+ return -EBADMSG;
+
+ data = from->compress_buffer;
+ l = rsize;
+#else
+ return -EPROTONOSUPPORT;
+#endif
+ } else
+ data = o->data.payload;
+
+ r = journal_file_append_data(to, data, l, &u, &h);
+ if (r < 0)
+ return r;
+
+ xor_hash ^= le64toh(u->data.hash);
+ items[i].object_offset = htole64(h);
+ items[i].hash = u->data.hash;
+
+ r = journal_file_move_to_object(from, OBJECT_ENTRY, p, &o);
+ if (r < 0)
+ return r;
+ }
+
+ return journal_file_append_entry_internal(to, &ts, xor_hash, items, n, seqnum, ret, offset);
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-08-16 13:49:58 +0000