fs-posix: Add "no-fsync" parameter.

This disables calling fdatasync() when fs_write() was done with
FS_OPEN_FLAG_FSYNC. Useful for making tests faster.

diff --git a/src/lib-fs/fs-posix.c b/src/lib-fs/fs-posix.c
index f8847602047d6ae7cc7c1ecd0315272b380e1786..4937cad7b1270aa4d1f88e88f6d1dd8d4fb67906 100644 (file)
--- a/src/lib-fs/fs-posix.c
+++ b/src/lib-fs/fs-posix.c
@@ -36,6 +36,7 @@ struct posix_fs {
        mode_t mode;
        bool mode_auto;
        bool have_dirs;
+       bool disable_fsync;
 };
 
 struct posix_fs_file {
@@ -107,6 +108,8 @@ fs_posix_init(struct fs *_fs, const char *args, const struct fs_settings *set)
                        fs->mode_auto = TRUE;
                } else if (strcmp(arg, "dirs") == 0) {
                        fs->have_dirs = TRUE;
+               } else if (strcmp(arg, "no-fsync") == 0) {
+                       fs->disable_fsync = TRUE;
                } else if (strncmp(arg, "mode=", 5) == 0) {
                        unsigned int mode;
                        if (str_to_uint_oct(arg+5, &mode) < 0) {
@@ -462,9 +465,11 @@ static void fs_posix_write_rename_if_needed(struct posix_fs_file *file)
 
 static int fs_posix_write_finish(struct posix_fs_file *file)
 {
+       struct posix_fs *fs = (struct posix_fs *)file->file.fs;
        int ret, old_errno;
 
-       if ((file->open_flags & FS_OPEN_FLAG_FSYNC) != 0) {
+       if ((file->open_flags & FS_OPEN_FLAG_FSYNC) != 0 &&
+           !fs->disable_fsync) {
                if (fdatasync(file->fd) < 0) {
                        fs_set_error(file->file.fs, "fdatasync(%s) failed: %m",
                                     file->full_path);