memfd: always use our internal utility functions where we have them

4 files changed, 17 insertions, 23 deletions

diff --git a/src/journal/journal-send.c b/src/journal/journal-send.c
index bfc404e375..0ee83cdb77 100644
--- a/src/journal/journal-send.c
+++ b/src/journal/journal-send.c
@@ -32,6 +32,7 @@
 #include "sd-journal.h"
 #include "util.h"
 #include "socket-util.h"
+#include "memfd.h"
 
 #define SNDBUF_SIZE (8*1024*1024)
 
@@ -313,16 +314,16 @@ _public_ int sd_journal_sendv(const struct iovec *iov, int n) {
          * here, since we want this to be a tmpfs, and one that is
          * available from early boot on and where unprivileged users
          * can create files. */
-        buffer_fd = memfd_create("journal-message", MFD_ALLOW_SEALING | MFD_CLOEXEC);
+        buffer_fd = memfd_new(NULL);
         if (buffer_fd < 0) {
-                if (errno == ENOSYS) {
+                if (buffer_fd == -ENOSYS) {
                         buffer_fd = open_tmpfile("/dev/shm", O_RDWR | O_CLOEXEC);
                         if (buffer_fd < 0)
                                 return buffer_fd;
 
                         seal = false;
                 } else
-                        return -errno;
+                        return buffer_fd;
         }
 
         n = writev(buffer_fd, w, j);
@@ -330,9 +331,9 @@ _public_ int sd_journal_sendv(const struct iovec *iov, int n) {
                 return -errno;
 
         if (seal) {
-                r = fcntl(buffer_fd, F_ADD_SEALS, F_SEAL_SHRINK | F_SEAL_GROW | F_SEAL_WRITE | F_SEAL_SEAL);
+                r = memfd_set_sealed(buffer_fd);
                 if (r < 0)
-                        return -errno;
+                        return r;
         }
 
         mh.msg_iov = NULL;
diff --git a/src/journal/journald-native.c b/src/journal/journald-native.c
index 6a9ae8a6ce..d3735ec73c 100644
--- a/src/journal/journald-native.c
+++ b/src/journal/journald-native.c
@@ -33,6 +33,7 @@
 #include "journald-console.h"
 #include "journald-syslog.h"
 #include "journald-wall.h"
+#include "memfd.h"
 
 bool valid_user_field(const char *p, size_t l, bool allow_protected) {
         const char *a;
@@ -319,9 +320,7 @@ void server_process_native_file(
         /* If it's a memfd, check if it is sealed. If so, we can just
          * use map it and use it, and do not need to copy the data
          * out. */
-        r = fcntl(fd, F_GET_SEALS);
-        sealed = r >= 0 &&
-                (r & (F_SEAL_SHRINK|F_SEAL_GROW|F_SEAL_WRITE|F_SEAL_SEAL)) == (F_SEAL_SHRINK|F_SEAL_GROW|F_SEAL_WRITE|F_SEAL_SEAL);
+        sealed = memfd_get_sealed(fd) > 0;
 
         if (!sealed && (!ucred || ucred->uid != 0)) {
                 _cleanup_free_ char *sl = NULL, *k = NULL;
diff --git a/src/libsystemd/sd-bus/bus-kernel.c b/src/libsystemd/sd-bus/bus-kernel.c
index 3f8b0ab65a..6692d9b7f5 100644
--- a/src/libsystemd/sd-bus/bus-kernel.c
+++ b/src/libsystemd/sd-bus/bus-kernel.c
@@ -1118,20 +1118,13 @@ int bus_kernel_pop_memfd(sd_bus *bus, void **address, size_t *mapped, size_t *al
         assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0);
 
         if (bus->n_memfd_cache <= 0) {
-                _cleanup_free_ char *g = NULL;
                 int r;
 
                 assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
 
-                assert(bus->connection_name);
-
-                g = bus_label_escape(bus->connection_name);
-                if (!g)
-                        return -ENOMEM;
-
-                r = memfd_create(g, MFD_ALLOW_SEALING|MFD_CLOEXEC);
+                r = memfd_new(bus->connection_name);
                 if (r < 0)
-                        return -errno;
+                        return r;
 
                 *address = NULL;
                 *mapped = 0;
@@ -1188,7 +1181,7 @@ void bus_kernel_push_memfd(sd_bus *bus, int fd, void *address, size_t mapped, si
 
         /* If overly long, let's return a bit to the OS */
         if (mapped > max_mapped) {
-                assert_se(ftruncate(fd, max_mapped) >= 0);
+                assert_se(memfd_set_size(fd, max_mapped) >= 0);
                 assert_se(munmap((uint8_t*) address + max_mapped, PAGE_ALIGN(mapped - max_mapped)) >= 0);
                 c->mapped = c->allocated = max_mapped;
         } else {
diff --git a/src/libsystemd/sd-bus/bus-message.c b/src/libsystemd/sd-bus/bus-message.c
index 1362a60f08..0eea32b649 100644
--- a/src/libsystemd/sd-bus/bus-message.c
+++ b/src/libsystemd/sd-bus/bus-message.c
@@ -1097,10 +1097,10 @@ static int part_make_space(
                         uint64_t new_allocated;
 
                         new_allocated = PAGE_ALIGN(sz > 0 ? 2 * sz : 1);
-                        r = ftruncate(part->memfd, new_allocated);
+                        r = memfd_set_size(part->memfd, new_allocated);
                         if (r < 0) {
                                 m->poisoned = true;
-                                return -errno;
+                                return r;
                         }
 
                         part->allocated = new_allocated;
@@ -2820,11 +2820,12 @@ int bus_message_seal(sd_bus_message *m, uint64_t cookie, usec_t timeout) {
 
                                 /* Then, sync up real memfd size */
                                 sz = part->size;
-                                if (ftruncate(part->memfd, sz) < 0)
-                                        return -errno;
+                                r = memfd_set_size(part->memfd, sz);
+                                if (r < 0)
+                                        return r;
 
                                 /* Finally, try to seal */
-                                if (fcntl(part->memfd, F_ADD_SEALS, F_SEAL_SHRINK | F_SEAL_GROW | F_SEAL_WRITE) >= 0)
+                                if (memfd_set_sealed(part->memfd) >= 0)
                                         part->sealed = true;
                         }
         }