From: Zbigniew Jędrzejewski-Szmek Date: Tue, 12 Nov 2013 05:53:59 +0000 (-0500) Subject: fsck,fstab-generator: be lenient about missing fsck. X-Git-Tag: v209~1422 X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=94192cdaf652c9717f15274504ed315126c07a93 fsck,fstab-generator: be lenient about missing fsck. If fstab contains 1 for passno, treat this as an error, but only warn briefly. If fstab doesn't contain this information, don't complain at all. Patch is complicated a bit by the fact that we might have the fstype specified in fstab or on /proc/cmdline, in which case we can check if we have the appropriate fsck tool, or not specified, or specified as auto, in which case we have to look and check the type of the filesystem ourselves. It cannot be done before the device appears, so it is too early in the generator phase, and it must be done directly in fsck service. --- diff --git a/src/fsck/fsck.c b/src/fsck/fsck.c index c2e1c741d..4f1aa22f9 100644 --- a/src/fsck/fsck.c +++ b/src/fsck/fsck.c @@ -212,10 +212,11 @@ int main(int argc, char *argv[]) { siginfo_t status; _cleanup_udev_unref_ struct udev *udev = NULL; _cleanup_udev_device_unref_ struct udev_device *udev_device = NULL; - const char *device; + const char *device, *type; bool root_directory; int progress_pipe[2] = { -1, -1 }; char dash_c[2+10+1]; + struct stat st; if (argc > 2) { log_error("This program expects one or no arguments."); @@ -234,11 +235,27 @@ int main(int argc, char *argv[]) { if (!arg_force && arg_skip) return 0; + udev = udev_new(); + if (!udev) { + log_oom(); + return EXIT_FAILURE; + } + if (argc > 1) { device = argv[1]; root_directory = false; + + if (stat(device, &st) < 0) { + log_error("Failed to stat '%s': %m", device); + return EXIT_FAILURE; + } + + udev_device = udev_device_new_from_devnum(udev, 'b', st.st_rdev); + if (!udev_device) { + log_error("Failed to detect device %s", device); + return EXIT_FAILURE; + } } else { - struct stat st; struct timespec times[2]; /* Find root device */ @@ -260,12 +277,6 @@ int main(int argc, char *argv[]) { return EXIT_SUCCESS; } - udev = udev_new(); - if (!udev) { - log_oom(); - return EXIT_FAILURE; - } - udev_device = udev_device_new_from_devnum(udev, 'b', st.st_dev); if (!udev_device) { log_error("Failed to detect root device."); @@ -281,6 +292,19 @@ int main(int argc, char *argv[]) { root_directory = true; } + type = udev_device_get_property_value(udev_device, "ID_FS_TYPE"); + if (type) { + const char *checker = strappenda("/sbin/fsck.", type); + r = access(checker, X_OK); + if (r < 0) { + if (errno == ENOENT) { + log_info("%s doesn't exist, not checking file system.", checker); + return EXIT_SUCCESS; + } else + log_warning("%s cannot be used: %m", checker); + } + } + if (arg_show_progress) if (pipe(progress_pipe) < 0) { log_error("pipe(): %m"); diff --git a/src/fstab-generator/fstab-generator.c b/src/fstab-generator/fstab-generator.c index 96b090614..fa0d3f735 100644 --- a/src/fstab-generator/fstab-generator.c +++ b/src/fstab-generator/fstab-generator.c @@ -146,6 +146,52 @@ static bool mount_in_initrd(struct mntent *me) { streq(me->mnt_dir, "/usr"); } +static int add_fsck(FILE *f, const char *what, const char *where, const char *type, int passno) { + assert(f); + + if (passno == 0) + return 0; + + if (type && !streq(type, "auto")) { + int r; + const char *checker; + + checker = strappenda("/sbin/fsck.", type); + r = access(checker, X_OK); + if (r < 0) { + log_warning("Checking was requested for %s, but %s cannot be used: %m", what, checker); + + /* treat missing check as essentially OK */ + return errno == ENOENT ? 0 : -errno; + } + } + + if (streq(where, "/")) { + char *lnk; + + lnk = strappenda(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".wants/systemd-fsck-root.service"); + mkdir_parents_label(lnk, 0755); + if (symlink("systemd-fsck-root.service", lnk) < 0) { + log_error("Failed to create symlink %s: %m", lnk); + return -errno; + } + } else { + _cleanup_free_ char *fsck = NULL; + + fsck = unit_name_from_path_instance("systemd-fsck", what, ".service"); + if (!fsck) + return log_oom(); + + fprintf(f, + "Requires=%s\n" + "After=%s\n", + fsck, + fsck); + } + + return 0; +} + static int add_mount( const char *what, const char *where, @@ -161,6 +207,7 @@ static int add_mount( *name = NULL, *unit = NULL, *lnk = NULL, *automount_name = NULL, *automount_unit = NULL; _cleanup_fclose_ FILE *f = NULL; + int r; assert(what); assert(where); @@ -208,32 +255,9 @@ static int add_mount( "Before=%s\n", post); - if (passno > 0) { - if (streq(where, "/")) { - lnk = strjoin(arg_dest, "/", SPECIAL_LOCAL_FS_TARGET, ".wants/", "systemd-fsck-root.service", NULL); - if (!lnk) - return log_oom(); - - mkdir_parents_label(lnk, 0755); - if (symlink("systemd-fsck-root.service", lnk) < 0) { - log_error("Failed to create symlink %s: %m", lnk); - return -errno; - } - } else { - _cleanup_free_ char *fsck = NULL; - - fsck = unit_name_from_path_instance("systemd-fsck", what, ".service"); - if (!fsck) - return log_oom(); - - fprintf(f, - "Requires=%s\n" - "After=%s\n", - fsck, - fsck); - } - } - + r = add_fsck(f, what, where, type, passno); + if (r < 0) + return r; fprintf(f, "\n" @@ -259,7 +283,6 @@ static int add_mount( if (!noauto) { if (post) { - free(lnk); lnk = strjoin(arg_dest, "/", post, nofail || automount ? ".wants/" : ".requires/", name, NULL); if (!lnk) return log_oom();