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smack: minimize ifdef use, and move all labeling to smack-util.c

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This commit is contained in:
Kay Sievers 2013-10-11 09:47:31 +02:00
parent adcdb37476
commit 9a4e038c15
4 changed files with 69 additions and 31 deletions
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25
src/core/socket.c
View File

@ -775,17 +775,13 @@ static void socket_apply_socket_options(Socket *s, int fd) {
log_warning_unit(UNIT(s)->id, "SO_REUSEPORT failed: %m");
}
#ifdef HAVE_SMACK
if (s->smack_ip_in && use_smack())
if (fsetxattr(fd, "security.SMACK64IPIN", s->smack_ip_in, strlen(s->smack_ip_in), 0) < 0)
log_error_unit(UNIT(s)->id,
"fsetxattr(\"security.SMACK64IPIN\"): %m");
if (s->smack_ip_in)
if (smack_label_ip_in_fd(fd, s->smack_ip_in) < 0)
log_error_unit(UNIT(s)->id, "smack_label_ip_in_fd: %m");
if (s->smack_ip_out && use_smack())
if (fsetxattr(fd, "security.SMACK64IPOUT", s->smack_ip_out, strlen(s->smack_ip_out), 0) < 0)
log_error_unit(UNIT(s)->id,
"fsetxattr(\"security.SMACK64IPOUT\"): %m");
#endif
if (s->smack_ip_out)
if (smack_label_ip_out_fd(fd, s->smack_ip_out) < 0)
log_error_unit(UNIT(s)->id, "smack_label_ip_out_fd: %m");
}
static void socket_apply_fifo_options(Socket *s, int fd) {
@ -797,12 +793,9 @@ static void socket_apply_fifo_options(Socket *s, int fd) {
log_warning_unit(UNIT(s)->id,
"F_SETPIPE_SZ: %m");
#ifdef HAVE_SMACK
if (s->smack && use_smack())
if (fsetxattr(fd, "security.SMACK64", s->smack, strlen(s->smack), 0) < 0)
log_error_unit(UNIT(s)->id,
"fsetxattr(\"security.SMACK64\"): %m");
#endif
if (s->smack)
if (smack_label_fd(fd, s->smack) < 0)
log_error_unit(UNIT(s)->id, "smack_label_fd: %m");
}
static int fifo_address_create(

52
src/shared/smack-util.c
View File

@ -22,11 +22,14 @@
***/
#include <unistd.h>
#include <string.h>
#ifdef HAVE_XATTR
#include <attr/xattr.h>
#endif
#include "smack-util.h"
bool use_smack(void) {
#ifdef HAVE_SMACK
static int use_smack_cached = -1;
@ -39,3 +42,50 @@ bool use_smack(void) {
#endif
}
int smack_label_path(const char *path, const char *label) {
#ifdef HAVE_SMACK
if (!use_smack())
return 0;
if (label)
return setxattr(path, "security.SMACK64", label, strlen(label), 0);
else
return lremovexattr(path, "security.SMACK64");
#else
return 0;
#endif
}
int smack_label_fd(int fd, const char *label) {
#ifdef HAVE_SMACK
if (!use_smack())
return 0;
return fsetxattr(fd, "security.SMACK64", label, strlen(label), 0);
#else
return 0;
#endif
}
int smack_label_ip_out_fd(int fd, const char *label) {
#ifdef HAVE_SMACK
if (!use_smack())
return 0;
return fsetxattr(fd, "security.SMACK64IPOUT", label, strlen(label), 0);
#else
return 0;
#endif
}
int smack_label_ip_in_fd(int fd, const char *label) {
#ifdef HAVE_SMACK
if (!use_smack())
return 0;
return fsetxattr(fd, "security.SMACK64IPIN", label, strlen(label), 0);
#else
return 0;
#endif
}

4
src/shared/smack-util.h
View File

@ -26,3 +26,7 @@
#include <stdbool.h>
bool use_smack(void);
int smack_label_path(const char *path, const char *label);
int smack_label_fd(int fd, const char *label);
int smack_label_ip_in_fd(int fd, const char *label);
int smack_label_ip_out_fd(int fd, const char *label);

19
src/udev/udev-node.c
View File

@ -28,12 +28,9 @@
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/types.h>
#ifdef HAVE_XATTR
#include <attr/xattr.h>
#endif
#include "smack-util.h"
#include "udev.h"
#include "smack-util.h"
static int node_symlink(struct udev_device *dev, const char *node, const char *slink)
{
@ -285,9 +282,7 @@ static int node_permissions_apply(struct udev_device *dev, bool apply,
if (apply) {
bool selinux = false;
#ifdef HAVE_SMACK
bool smack = false;
#endif
if ((stats.st_mode & 0777) != (mode & 0777) || stats.st_uid != uid || stats.st_gid != gid) {
log_debug("set permissions %s, %#o, uid=%u, gid=%u\n", devnode, mode, uid, gid);
@ -311,14 +306,12 @@ static int node_permissions_apply(struct udev_device *dev, bool apply,
else
log_debug("SECLABEL: set SELinux label '%s'", label);
#ifdef HAVE_SMACK
} else if (streq(name, "smack") && use_smack()) {
} else if (streq(name, "smack")) {
smack = true;
if (lsetxattr(devnode, "security.SMACK64", label, strlen(label), 0) < 0)
if (smack_label_path(devnode, label) < 0)
log_error("SECLABEL: failed to set SMACK label '%s'", label);
else
log_debug("SECLABEL: set SMACK label '%s'", label);
#endif
} else
log_error("SECLABEL: unknown subsystem, ignoring '%s'='%s'", name, label);
@ -327,10 +320,8 @@ static int node_permissions_apply(struct udev_device *dev, bool apply,
/* set the defaults */
if (!selinux)
label_fix(devnode, true, false);
#ifdef HAVE_SMACK
if (!smack && use_smack())
lremovexattr(devnode, "security.SMACK64");
#endif
if (!smack)
smack_label_path(devnode, NULL);
}
/* always update timestamp when we re-use the node, like on media change events */