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journal: add inline compression support with XZ

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This commit is contained in:
Lennart Poettering 2011-12-21 02:40:59 +01:00
parent bc85bfee87
commit 807e17f05e
9 changed files with 187 additions and 13 deletions
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27
Makefile.am
View File

@ -1028,6 +1028,15 @@ test_journal_CFLAGS = \
test_journal_LDADD = \
libsystemd-basic.la
if HAVE_XZ
test_journal_SOURCES += \
src/journal/compress.c
test_journal_CFLAGS += \
$(XZ_CFLAGS)
test_journal_LDADD += \
$(XZ_LIBS)
endif
systemd_journald_SOURCES = \
src/journal/journald.c \
src/journal/sd-journal.c \
@ -1046,6 +1055,15 @@ systemd_journald_LDADD = \
libsystemd-daemon.la \
$(ACL_LIBS)
if HAVE_XZ
systemd_journald_SOURCES += \
src/journal/compress.c
systemd_journald_CFLAGS += \
$(XZ_CFLAGS)
systemd_journald_LDADD += \
$(XZ_LIBS)
endif
systemd_journalctl_SOURCES = \
src/journal/journalctl.c \
src/journal/sd-journal.c \
@ -1059,6 +1077,15 @@ systemd_journalctl_CFLAGS = \
systemd_journalctl_LDADD = \
libsystemd-basic.la
if HAVE_XZ
systemd_journalctl_SOURCES += \
src/journal/compress.c
systemd_journalctl_CFLAGS += \
$(XZ_CFLAGS)
systemd_journalctl_LDADD += \
$(XZ_LIBS)
endif
systemd_stdout_syslog_bridge_SOURCES = \
src/stdout-syslog-bridge.c \
src/tcpwrap.c

2
TODO
View File

@ -21,6 +21,8 @@ Bugfixes:
Features:
* logind: sends SessionNew on Lock()?
* logind: allow showing logout dialog from system
* document that %% can be used to write % in a string that is specifier extended

14
configure.ac
View File

@ -149,6 +149,19 @@ if test "x$enable_selinux" != "xno"; then
fi
AM_CONDITIONAL(HAVE_SELINUX, [test "$have_selinux" = "yes"])
have_xz=no
AC_ARG_ENABLE(xz, AS_HELP_STRING([--disable-xz], [Disable optional XZ support]))
if test "x$enable_xz" != "xno"; then
PKG_CHECK_MODULES(XZ, [ liblzma ],
[AC_DEFINE(HAVE_XZ, 1, [Define if XZ is available]) have_xz=yes], have_xz=no)
AC_SUBST(XZ_CFLAGS)
AC_SUBST(XZ_LIBS)
if test "x$have_xz" = xno -a "x$enable_xz" = xyes; then
AC_MSG_ERROR([*** Xz support requested but libraries not found])
fi
fi
AM_CONDITIONAL(HAVE_XZ, [test "$have_xz" = "yes"])
AC_ARG_ENABLE([tcpwrap],
AS_HELP_STRING([--disable-tcpwrap],[Disable optional TCP wrappers support]),
[case "${enableval}" in
@ -591,6 +604,7 @@ AC_MSG_RESULT([
PAM: ${have_pam}
AUDIT: ${have_audit}
SELinux: ${have_selinux}
XZ: ${have_xz}
ACL: ${have_acl}
binfmt: ${have_binfmt}
hostnamed: ${have_hostnamed}

13
src/journal/journal-def.h
View File

@ -50,9 +50,15 @@ enum {
_OBJECT_TYPE_MAX
};
/* Object flags */
enum {
OBJECT_COMPRESSED = 1
};
_packed_ struct ObjectHeader {
uint8_t type;
uint8_t reserved[7];
uint8_t flags;
uint8_t reserved[6];
uint64_t size;
uint8_t payload[];
};
@ -123,6 +129,11 @@ enum {
STATE_ARCHIVED
};
/* Header flags */
enum {
HEADER_INCOMPATIBLE_COMPRESSED = 1
};
_packed_ struct Header {
uint8_t signature[8]; /* "LPKSHHRH" */
uint32_t compatible_flags;

75
src/journal/journal-file.c
View File

@ -30,12 +30,15 @@
#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)
@ -57,6 +60,11 @@ void journal_file_close(JournalFile *f) {
close_nointr_nofail(f->fd);
free(f->path);
#ifdef HAVE_XZ
free(f->compress_buffer);
#endif
free(f);
}
@ -120,8 +128,13 @@ static int journal_file_verify_header(JournalFile *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;
@ -309,7 +322,7 @@ static bool verify_hash(Object *o) {
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) {
@ -581,12 +594,40 @@ int journal_file_find_data_object_with_hash(
if (r < 0)
return r;
if (le64toh(o->object.size) == osize &&
memcmp(o->data.payload, data, size) == 0) {
if (le64toh(o->data.hash) != hash)
return -EBADMSG;
if (le64toh(o->data.hash) != hash)
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;
@ -624,6 +665,7 @@ static int journal_file_append_data(JournalFile *f, const void *data, uint64_t s
uint64_t osize;
Object *o;
int r;
bool compressed = false;
assert(f);
assert(data || size == 0);
@ -650,7 +692,27 @@ static int journal_file_append_data(JournalFile *f, const void *data, uint64_t s
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)
@ -1585,6 +1647,9 @@ void journal_file_dump(JournalFile *f) {
break;
}
if (o->object.flags & OBJECT_COMPRESSED)
printf("Flags: COMPRESSED\n");
if (p == le64toh(f->header->tail_object_offset))
p = 0;
else

7
src/journal/journal-file.h
View File

@ -75,6 +75,13 @@ typedef struct JournalFile {
uint64_t current_offset;
JournalMetrics metrics;
bool compress;
#ifdef HAVE_XZ
void *compress_buffer;
size_t compress_buffer_size;
#endif
} JournalFile;
typedef enum direction {

11
src/journal/journald.c
View File

@ -57,6 +57,7 @@ typedef struct Server {
JournalMetrics metrics;
uint64_t max_use;
bool compress;
} Server;
static void fix_perms(JournalFile *f, uid_t uid) {
@ -146,6 +147,8 @@ static JournalFile* find_journal(Server *s, uid_t uid) {
return s->system_journal;
fix_perms(f, uid);
f->metrics = s->metrics;
f->compress = s->compress;
r = hashmap_put(s->user_journals, UINT32_TO_PTR(uid), f);
if (r < 0) {
@ -661,6 +664,9 @@ static int system_journal_open(Server *s) {
free(fn);
if (r >= 0) {
s->system_journal->metrics = s->metrics;
s->system_journal->compress = s->compress;
fix_perms(s->system_journal, 0);
return r;
}
@ -685,6 +691,9 @@ static int system_journal_open(Server *s) {
return r;
}
s->runtime_journal->metrics = s->metrics;
s->runtime_journal->compress = s->compress;
fix_perms(s->runtime_journal, 0);
return r;
}
@ -794,6 +803,7 @@ static int server_init(Server *s) {
s->metrics.min_size = DEFAULT_MIN_SIZE;
s->metrics.keep_free = DEFAULT_KEEP_FREE;
s->max_use = DEFAULT_MAX_USE;
s->compress = true;
s->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
if (s->epoll_fd < 0) {
@ -931,6 +941,7 @@ int main(int argc, char *argv[]) {
}
log_set_target(LOG_TARGET_CONSOLE);
log_set_max_level(LOG_DEBUG);
log_parse_environment();
log_open();

49
src/journal/sd-journal.c
View File

@ -31,6 +31,7 @@
#include "hashmap.h"
#include "list.h"
#include "lookup3.h"
#include "compress.h"
#define JOURNAL_FILES_MAX 1024
@ -1344,7 +1345,7 @@ int sd_journal_get_data(sd_journal *j, const char *field, const void **data, siz
size_t t;
p = le64toh(o->entry.items[i].object_offset);
le_hash = o->entry.items[j->current_field].hash;
le_hash = o->entry.items[i].hash;
r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
if (r < 0)
return r;
@ -1354,9 +1355,31 @@ int sd_journal_get_data(sd_journal *j, const char *field, const void **data, siz
l = le64toh(o->object.size) - offsetof(Object, data.payload);
if (l >= field_length+1 &&
memcmp(o->data.payload, field, field_length) == 0 &&
o->data.payload[field_length] == '=') {
if (o->object.flags & OBJECT_COMPRESSED) {
#ifdef HAVE_XZ
if (uncompress_startswith(o->data.payload, l,
&f->compress_buffer, &f->compress_buffer_size,
field, field_length, '=')) {
uint64_t rsize;
if (!uncompress_blob(o->data.payload, l,
&f->compress_buffer, &f->compress_buffer_size, &rsize))
return -EBADMSG;
*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;
@ -1419,8 +1442,22 @@ int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *size) {
if ((uint64_t) t != l)
return -E2BIG;
*data = o->data.payload;
*size = t;
if (o->object.flags & OBJECT_COMPRESSED) {
#ifdef HAVE_XZ
uint64_t rsize;
if (!uncompress_blob(o->data.payload, l, &f->compress_buffer, &f->compress_buffer_size, &rsize))
return -EBADMSG;
*data = f->compress_buffer;
*size = (size_t) rsize;
#else
return -EPROTONOSUPPORT;
#endif
} else {
*data = o->data.payload;
*size = t;
}
j->current_field ++;

2
src/journal/sd-journal.h
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@ -38,7 +38,7 @@
* - accelerate looking for "all hostnames" and suchlike.
* - throttling
* - cryptographic hash
* - compression
* - never access beyond fle size check
*/
/* Write to daemon */