import: also set NOCOW for gpt disk images

[elogind.git] / src / import / import-gpt.c

diff --git a/src/import/import-gpt.c b/src/import/import-gpt.c
index a85ceee337218e8440477cb850056ca040e42a4b..d304a399fb86c2845aae74e5387351e6a63c7f72 100644 (file)
--- a/src/import/import-gpt.c
+++ b/src/import/import-gpt.c
@@ -20,6 +20,7 @@
 ***/
 
 #include <sys/xattr.h>
+#include <linux/fs.h>
 #include <curl/curl.h>
 
 #include "hashmap.h"
@@ -165,7 +166,7 @@ static void gpt_import_file_success(GptImportFile *f) {
 
                         f->disk_fd = open(f->final_path, O_RDONLY|O_NOCTTY|O_CLOEXEC);
                         if (f->disk_fd < 0) {
-                                r = log_error_errno(errno, "Failed top open vendor image: %m");
+                                r = log_error_errno(errno, "Failed to open vendor image: %m");
                                 goto finish;
                         }
                 }
@@ -186,6 +187,14 @@ static void gpt_import_file_success(GptImportFile *f) {
                         goto finish;
                 }
 
+                /* Turn off COW writing. This should greatly improve
+                 * performance on COW file systems like btrfs, since it
+                 * reduces fragmentation caused by not allowing in-place
+                 * writes. */
+                r = chattr_fd(dfd, true, FS_NOCOW_FL);
+                if (r < 0)
+                        log_warning_errno(errno, "Failed to set file attributes on %s: %m", f->temp_path);
+
                 r = copy_bytes(f->disk_fd, dfd, (off_t) -1, true);
                 if (r < 0) {
                         log_error_errno(r, "Failed to make writable copy of image: %m");