#include "journal-def.h"
#include "journal-file.h"
#include "lookup3.h"
-
-#define DEFAULT_ARENA_MAX_SIZE (16ULL*1024ULL*1024ULL*1024ULL)
-#define DEFAULT_ARENA_MIN_SIZE (256ULL*1024ULL)
-#define DEFAULT_ARENA_KEEP_FREE (1ULL*1024ULL*1024ULL)
-
-#define DEFAULT_MAX_USE (16ULL*1024ULL*1024ULL*16ULL)
+#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)
close_nointr_nofail(f->fd);
free(f->path);
+
+#ifdef HAVE_XZ
+ free(f->compress_buffer);
+#endif
+
free(f);
}
zero(h);
memcpy(h.signature, signature, 8);
h.arena_offset = htole64(ALIGN64(sizeof(h)));
- h.arena_max_size = htole64(DEFAULT_ARENA_MAX_SIZE);
- h.arena_min_size = htole64(DEFAULT_ARENA_MIN_SIZE);
- h.arena_keep_free = htole64(DEFAULT_ARENA_KEEP_FREE);
r = sd_id128_randomize(&h.file_id);
if (r < 0)
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;
}
static int journal_file_allocate(JournalFile *f, uint64_t offset, uint64_t size) {
- uint64_t asize;
uint64_t old_size, new_size;
assert(f);
- if (offset < le64toh(f->header->arena_offset))
- return -EINVAL;
-
- new_size = PAGE_ALIGN(offset + size);
-
/* We assume that this file is not sparse, and we know that
* for sure, since we always call posix_fallocate()
* ourselves */
le64toh(f->header->arena_offset) +
le64toh(f->header->arena_size);
- if (old_size >= new_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;
- asize = new_size - le64toh(f->header->arena_offset);
+ if (f->metrics.max_size > 0 &&
+ new_size > f->metrics.max_size)
+ return -E2BIG;
- if (asize > le64toh(f->header->arena_min_size)) {
+ if (new_size > f->metrics.min_size &&
+ f->metrics.keep_free > 0) {
struct statvfs svfs;
if (fstatvfs(f->fd, &svfs) >= 0) {
available = svfs.f_bfree * svfs.f_bsize;
- if (available >= f->header->arena_keep_free)
- available -= f->header->arena_keep_free;
+ if (available >= f->metrics.keep_free)
+ available -= f->metrics.keep_free;
else
available = 0;
}
}
- if (asize > le64toh(f->header->arena_max_size))
- 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 = htole64(asize);
+ f->header->arena_size = new_size - htole64(f->header->arena_offset);
return 0;
}
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;
} 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,
assert(o);
- if (o->object.type == OBJECT_DATA) {
+ 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) {
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);
if (r < 0)
return r;
- if (le64toh(o->object.size) == osize &&
- memcmp(o->data.payload, data, size) == 0) {
+ 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 (le64toh(o->data.hash) != hash)
+ 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;
return 1;
}
+ next:
p = le64toh(o->data.next_hash_offset);
}
uint64_t osize;
Object *o;
int r;
+ bool compressed = false;
assert(f);
assert(data || size == 0);
return r;
o->data.hash = htole64(hash);
- memcpy(o->data.payload, data, size);
+
+#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)
if (r < 0)
return r;
- log_error("%s %lu", f->path, (unsigned long) f->header->n_entries);
+ 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;
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;
if (ts->realtime < le64toh(f->header->tail_entry_realtime))
return -EINVAL;
- items = new(EntryItem, n_iovec);
- if (!items)
- return -ENOMEM;
+ items = alloca(sizeof(EntryItem) * n_iovec);
for (i = 0; i < n_iovec; i++) {
uint64_t p;
r = journal_file_append_data(f, iovec[i].iov_base, iovec[i].iov_len, &o, &p);
if (r < 0)
- goto finish;
+ return r;
xor_hash ^= le64toh(o->data.hash);
items[i].object_offset = htole64(p);
r = journal_file_append_entry_internal(f, ts, xor_hash, items, n_iovec, seqnum, ret, offset);
-finish:
- free(items);
+ journal_file_post_change(f);
return r;
}
/* This bisects the array in object 'first', but first checks
* an extra */
-
r = test_object(f, extra, needle);
if (r < 0)
return r;
if (offset)
*offset = extra;
+
+ if (idx)
+ *idx = 0;
+
+ return 1;
} else if (r == TEST_RIGHT)
return 0;
assert(p > 0 || !o);
r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d);
- if (r <= 0)
+ if (r < 0)
return r;
n = le64toh(d->data.n_entries);
break;
}
+ if (o->object.flags & OBJECT_COMPRESSED)
+ printf("Flags: COMPRESSED\n");
+
if (p == le64toh(f->header->tail_object_offset))
p = 0;
else
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;
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);
+}
~ianmdlvl / elogind.git / blobdiff