X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fshared%2Flabel.c;h=d353da57ec3d2779d2de7a77388ae7193426aae3;hp=dce6f45c80a83a0ebb87872b20c822cbccb22dcf;hb=f274ece0f76b5709408821e317e87aef76123db6;hpb=5430f7f2bc7330f3088b894166bf3524a067e3d8

diff --git a/src/shared/label.c b/src/shared/label.c
index dce6f45c8..d353da57e 100644
--- a/src/shared/label.c
+++ b/src/shared/label.c
@@ -28,30 +28,18 @@
 
 #include "label.h"
 #include "util.h"
+#include "path-util.h"
 
 #ifdef HAVE_SELINUX
+#include "selinux-util.h"
 #include <selinux/selinux.h>
 #include <selinux/label.h>
 
 static struct selabel_handle *label_hnd = NULL;
 
-static int use_selinux_cached = -1;
-
-static inline bool use_selinux(void) {
-
-        if (use_selinux_cached < 0)
-                use_selinux_cached = is_selinux_enabled() > 0;
-
-        return use_selinux_cached;
-}
-
-void label_retest_selinux(void) {
-        use_selinux_cached = -1;
-}
-
 #endif
 
-int label_init(void) {
+int label_init(const char *prefix) {
         int r = 0;
 
 #ifdef HAVE_SELINUX
@@ -67,7 +55,15 @@ int label_init(void) {
         before_mallinfo = mallinfo();
         before_timestamp = now(CLOCK_MONOTONIC);
 
-        label_hnd = selabel_open(SELABEL_CTX_FILE, NULL, 0);
+        if (prefix) {
+                struct selinux_opt options[] = {
+                        { .type = SELABEL_OPT_SUBSET, .value = prefix },
+                };
+
+                label_hnd = selabel_open(SELABEL_CTX_FILE, options, ELEMENTSOF(options));
+        } else
+                label_hnd = selabel_open(SELABEL_CTX_FILE, NULL, 0);
+
         if (!label_hnd) {
                 log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
                          "Failed to initialize SELinux context: %m");
@@ -81,16 +77,16 @@ int label_init(void) {
 
                 l = after_mallinfo.uordblks > before_mallinfo.uordblks ? after_mallinfo.uordblks - before_mallinfo.uordblks : 0;
 
-                log_info("Successfully loaded SELinux database in %s, size on heap is %iK.",
-                         format_timespan(timespan, sizeof(timespan), after_timestamp - before_timestamp),
-                         (l+1023)/1024);
+                log_debug("Successfully loaded SELinux database in %s, size on heap is %iK.",
+                          format_timespan(timespan, sizeof(timespan), after_timestamp - before_timestamp),
+                          (l+1023)/1024);
         }
 #endif
 
         return r;
 }
 
-int label_fix(const char *path, bool ignore_enoent) {
+int label_fix(const char *path, bool ignore_enoent, bool ignore_erofs) {
         int r = 0;
 
 #ifdef HAVE_SELINUX
@@ -123,6 +119,9 @@ int label_fix(const char *path, bool ignore_enoent) {
                 if (ignore_enoent && errno == ENOENT)
                         return 0;
 
+                if (ignore_erofs && errno == EROFS)
+                        return 0;
+
                 log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
                          "Unable to fix label of %s: %m", path);
                 r = security_getenforce() == 1 ? -errno : 0;
@@ -177,7 +176,7 @@ fail:
         return r;
 }
 
-int label_fifofile_set(const char *path) {
+int label_context_set(const char *path, mode_t mode) {
         int r = 0;
 
 #ifdef HAVE_SELINUX
@@ -186,37 +185,8 @@ int label_fifofile_set(const char *path) {
         if (!use_selinux() || !label_hnd)
                 return 0;
 
-        r = selabel_lookup_raw(label_hnd, &filecon, path, S_IFIFO);
-        if (r < 0)
-                r = -errno;
-        else if (r == 0) {
-                r = setfscreatecon(filecon);
-                if (r < 0) {
-                        log_error("Failed to set SELinux file context on %s: %m", path);
-                        r = -errno;
-                }
-
-                freecon(filecon);
-        }
-
-        if (r < 0 && security_getenforce() == 0)
-                r = 0;
-#endif
-
-        return r;
-}
-
-int label_symlinkfile_set(const char *path) {
-        int r = 0;
-
-#ifdef HAVE_SELINUX
-        security_context_t filecon = NULL;
-
-        if (!use_selinux() || !label_hnd)
-                return 0;
-
-        r = selabel_lookup_raw(label_hnd, &filecon, path, S_IFLNK);
-        if (r < 0)
+        r = selabel_lookup_raw(label_hnd, &filecon, path, mode);
+        if (r < 0 && errno != ENOENT)
                 r = -errno;
         else if (r == 0) {
                 r = setfscreatecon(filecon);
@@ -253,7 +223,7 @@ int label_socket_set(const char *label) {
         return 0;
 }
 
-void label_file_clear(void) {
+void label_context_clear(void) {
 
 #ifdef HAVE_SELINUX
         if (!use_selinux())
@@ -283,15 +253,14 @@ void label_free(const char *label) {
 #endif
 }
 
-int label_mkdir(const char *path, mode_t mode) {
+int label_mkdir(const char *path, mode_t mode, bool apply) {
 
         /* Creates a directory and labels it according to the SELinux policy */
-
 #ifdef HAVE_SELINUX
         int r;
         security_context_t fcon = NULL;
 
-        if (!use_selinux() || !label_hnd)
+        if (!apply || !use_selinux() || !label_hnd)
                 goto skipped;
 
         if (path_is_absolute(path))