#define COMPRESSION_SIZE_THRESHOLD (64ULL)
+/* This is the minimum journal file size */
+#define JOURNAL_FILE_SIZE_MIN (64ULL*1024ULL)
+
+/* These are the lower and upper bounds if we deduce the max_use value
+ * from the file system size */
+#define DEFAULT_MAX_USE_LOWER (1ULL*1024ULL*1024ULL) /* 1 MiB */
+#define DEFAULT_MAX_USE_UPPER (4ULL*1024ULL*1024ULL*1024ULL) /* 4 GiB */
+
+/* This is the upper bound if we deduce max_size from max_use */
+#define DEFAULT_MAX_SIZE_UPPER (16ULL*1024ULL*1024ULL) /* 16 MiB */
+
+/* This is the upper bound if we deduce the keep_free value from the
+ * file system size */
+#define DEFAULT_KEEP_FREE_UPPER (4ULL*1024ULL*1024ULL*1024ULL) /* 4 GiB */
+
+/* This is the keep_free value when we can't determine the system
+ * size */
+#define DEFAULT_KEEP_FREE (1024ULL*1024ULL) /* 1 MB */
+
static const char signature[] = { 'L', 'P', 'K', 'S', 'H', 'H', 'R', 'H' };
#define ALIGN64(x) (((x) + 7ULL) & ~7ULL)
f->header->boot_id = boot_id;
f->header->state = STATE_ONLINE;
+
+ __sync_synchronize();
+
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;
}
static int journal_file_move_to(JournalFile *f, int wt, uint64_t offset, uint64_t size, void **ret) {
- void *p;
+ void *p = NULL;
uint64_t delta;
int r;
Window *w;
assert(wt >= 0);
assert(wt < _WINDOW_MAX);
+ if (offset + size > (uint64_t) f->last_stat.st_size) {
+ /* Hmm, out of range? Let's refresh the fstat() data
+ * first, before we trust that check. */
+
+ if (fstat(f->fd, &f->last_stat) < 0 ||
+ offset + size > (uint64_t) f->last_stat.st_size)
+ return -EADDRNOTAVAIL;
+ }
+
w = f->windows + wt;
if (_likely_(w->ptr &&
delta = PAGE_ALIGN((DEFAULT_WINDOW_SIZE - size) / 2);
- if (offset < delta)
+ if (delta > offset)
delta = offset;
offset -= delta;
- size += (DEFAULT_WINDOW_SIZE - delta);
+ size = DEFAULT_WINDOW_SIZE;
} else
delta = 0;
+ 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(offset > 0);
assert(o->object.type == OBJECT_ENTRY);
+ __sync_synchronize();
+
/* Link up the entry itself */
r = link_entry_into_array(f,
&f->header->entry_array_offset,
return 0;
}
-static void journal_file_post_change(JournalFile *f) {
+void journal_file_post_change(JournalFile *f) {
assert(f);
/* inotify() does not receive IN_MODIFY events from file
ts->monotonic < le64toh(f->header->tail_entry_monotonic))
return -EINVAL;
- 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);
journal_file_post_change(f);
-finish:
- free(items);
-
return r;
}
Object **ret, uint64_t *offset) {
Object *o;
- uint64_t p, a;
+ uint64_t p = 0, a;
int r;
assert(f);
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;
assert(directory);
if (max_use <= 0)
- max_use = DEFAULT_MAX_USE;
+ return 0;
d = opendir(directory);
if (!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);
+}
+
+void journal_default_metrics(JournalMetrics *m, int fd) {
+ uint64_t fs_size = 0;
+ struct statvfs ss;
+ char a[64], b[64], c[64], d[64];
+
+ assert(m);
+ assert(fd >= 0);
+
+ if (fstatvfs(fd, &ss) >= 0)
+ fs_size = ss.f_frsize * ss.f_blocks;
+
+ if (m->max_use == (uint64_t) -1) {
+
+ if (fs_size > 0) {
+ m->max_use = PAGE_ALIGN(fs_size / 10); /* 10% of file system size */
+
+ if (m->max_use > DEFAULT_MAX_USE_UPPER)
+ m->max_use = DEFAULT_MAX_USE_UPPER;
+
+ if (m->max_use < DEFAULT_MAX_USE_LOWER)
+ m->max_use = DEFAULT_MAX_USE_LOWER;
+ } else
+ m->max_use = DEFAULT_MAX_USE_LOWER;
+ } else {
+ m->max_use = PAGE_ALIGN(m->max_use);
+
+ if (m->max_use < JOURNAL_FILE_SIZE_MIN*2)
+ m->max_use = JOURNAL_FILE_SIZE_MIN*2;
+ }
+
+ if (m->max_size == (uint64_t) -1) {
+ m->max_size = PAGE_ALIGN(m->max_use / 8); /* 8 chunks */
+
+ if (m->max_size > DEFAULT_MAX_SIZE_UPPER)
+ m->max_size = DEFAULT_MAX_SIZE_UPPER;
+ } else
+ m->max_size = PAGE_ALIGN(m->max_size);
+
+ if (m->max_size < JOURNAL_FILE_SIZE_MIN)
+ m->max_size = JOURNAL_FILE_SIZE_MIN;
+
+ if (m->max_size*2 > m->max_use)
+ m->max_use = m->max_size*2;
+
+ if (m->min_size == (uint64_t) -1)
+ m->min_size = JOURNAL_FILE_SIZE_MIN;
+ else {
+ m->min_size = PAGE_ALIGN(m->min_size);
+
+ if (m->min_size < JOURNAL_FILE_SIZE_MIN)
+ m->min_size = JOURNAL_FILE_SIZE_MIN;
+
+ if (m->min_size > m->max_size)
+ m->max_size = m->min_size;
+ }
+
+ if (m->keep_free == (uint64_t) -1) {
+
+ if (fs_size > 0) {
+ m->keep_free = PAGE_ALIGN(fs_size / 20); /* 5% of file system size */
+
+ if (m->keep_free > DEFAULT_KEEP_FREE_UPPER)
+ m->keep_free = DEFAULT_KEEP_FREE_UPPER;
+
+ } else
+ m->keep_free = DEFAULT_KEEP_FREE;
+ }
+
+ log_debug("Fixed max_use=%s max_size=%s min_size=%s keep_free=%s",
+ format_bytes(a, sizeof(a), m->max_use),
+ format_bytes(b, sizeof(b), m->max_size),
+ format_bytes(c, sizeof(c), m->min_size),
+ format_bytes(d, sizeof(d), m->keep_free));
+}
~ianmdlvl / elogind.git / blobdiff