#include "mount-setup.h"
#include "special.h"
#include "mkdir.h"
+#include "fileio.h"
+#include "generator.h"
+#include "strv.h"
+#include "virt.h"
static const char *arg_dest = "/tmp";
-
-static int device_name(const char *path, char **unit) {
- char *p;
-
- assert(path);
-
- if (!is_device_path(path))
- return 0;
-
- p = unit_name_from_path(path, ".device");
- if (!p)
- return -ENOMEM;
-
- *unit = p;
- return 1;
-}
+static bool arg_fstab_enabled = true;
+static char *arg_root_what = NULL;
+static char *arg_root_fstype = NULL;
+static char *arg_root_options = NULL;
+static int arg_root_rw = -1;
static int mount_find_pri(struct mntent *me, int *ret) {
char *end, *pri;
errno = 0;
r = strtoul(pri, &end, 10);
- if (errno != 0)
+ if (errno > 0)
return -errno;
if (end == pri || (*end != ',' && *end != 0))
}
static int add_swap(const char *what, struct mntent *me) {
- char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL;
- FILE *f = NULL;
- bool noauto, nofail;
+ _cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ bool noauto;
int r, pri = -1;
assert(what);
assert(me);
+ if (detect_container(NULL) > 0) {
+ log_info("Running in a container, ignoring fstab swap entry for %s.", what);
+ return 0;
+ }
+
r = mount_find_pri(me, &pri);
if (r < 0) {
log_error("Failed to parse priority");
}
noauto = !!hasmntopt(me, "noauto");
- nofail = !!hasmntopt(me, "nofail");
name = unit_name_from_path(what, ".swap");
- if (!name) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
+ if (!name)
+ return log_oom();
- unit = join(arg_dest, "/", name, NULL);
- if (!unit) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
+ unit = strjoin(arg_dest, "/", name, NULL);
+ if (!unit)
+ return log_oom();
f = fopen(unit, "wxe");
if (!f) {
- r = -errno;
- log_error("Failed to create unit file: %m");
- goto finish;
+ if (errno == EEXIST)
+ log_error("Failed to create swap unit file %s, as it already exists. Duplicate entry in /etc/fstab?", unit);
+ else
+ log_error("Failed to create unit file %s: %m", unit);
+ return -errno;
}
- fputs("# Automatically generated by systemd-fstab-generator\n\n"
- "[Unit]\n"
- "SourcePath=/etc/fstab\n"
- "DefaultDependencies=no\n"
- "Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
- "Before=" SPECIAL_UMOUNT_TARGET "\n", f);
-
- if (!noauto && !nofail)
- fputs("Before=" SPECIAL_SWAP_TARGET "\n", f);
-
fprintf(f,
- "\n"
+ "# Automatically generated by systemd-fstab-generator\n\n"
+ "[Unit]\n"
+ "SourcePath=/etc/fstab\n"
+ "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n"
"[Swap]\n"
"What=%s\n",
what);
fflush(f);
if (ferror(f)) {
- log_error("Failed to write unit file: %m");
- r = -errno;
- goto finish;
+ log_error("Failed to write unit file %s: %m", unit);
+ return -errno;
}
if (!noauto) {
- lnk = join(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL);
- if (!lnk) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
+ lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL);
+ if (!lnk)
+ return log_oom();
- mkdir_parents(lnk, 0755);
+ mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0) {
- log_error("Failed to create symlink: %m");
- r = -errno;
- goto finish;
- }
-
- r = device_name(what, &device);
- if (r < 0) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
-
- if (r > 0) {
- free(lnk);
- lnk = join(arg_dest, "/", device, ".wants/", name, NULL);
- if (!lnk) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
-
- mkdir_parents(lnk, 0755);
- if (symlink(unit, lnk) < 0) {
- log_error("Failed to create symlink: %m");
- r = -errno;
- goto finish;
- }
+ log_error("Failed to create symlink %s: %m", lnk);
+ return -errno;
}
}
- r = 0;
-finish:
- if (f)
- fclose(f);
-
- free(unit);
- free(lnk);
- free(name);
- free(device);
-
- return r;
+ return 0;
}
-static bool mount_is_bind(struct mntent *me) {
+static bool mount_is_network(struct mntent *me) {
assert(me);
return
- hasmntopt(me, "bind") ||
- streq(me->mnt_opts, "bind");
+ hasmntopt(me, "_netdev") ||
+ fstype_is_network(me->mnt_type);
}
-static bool mount_is_network(struct mntent *me) {
+static bool mount_in_initrd(struct mntent *me) {
assert(me);
return
- hasmntopt(me, "_netdev") ||
- fstype_is_network(me->mnt_type);
+ hasmntopt(me, "x-initrd.mount") ||
+ streq(me->mnt_dir, "/usr");
}
-static int add_mount(const char *what, const char *where, struct mntent *me) {
- char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL, *automount_name = NULL, *automount_unit = NULL;
- FILE *f = NULL;
- bool noauto, nofail, automount, isbind, isnetwork;
+static int add_mount(
+ const char *what,
+ const char *where,
+ const char *fstype,
+ const char *opts,
+ int passno,
+ bool noauto,
+ bool nofail,
+ bool automount,
+ const char *post,
+ const char *source) {
+
+ _cleanup_free_ char
+ *name = NULL, *unit = NULL, *lnk = NULL,
+ *automount_name = NULL, *automount_unit = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
int r;
- const char *post, *pre;
assert(what);
assert(where);
- assert(me);
+ assert(opts);
+ assert(source);
- if (streq(me->mnt_type, "autofs"))
+ if (streq_ptr(fstype, "autofs"))
return 0;
if (!is_path(where)) {
mount_point_ignore(where))
return 0;
- isnetwork = mount_is_network(me);
- isbind = mount_is_bind(me);
-
- noauto = !!hasmntopt(me, "noauto");
- nofail = !!hasmntopt(me, "nofail");
- automount =
- hasmntopt(me, "comment=systemd.automount") ||
- hasmntopt(me, "x-systemd.automount");
-
- if (isnetwork) {
- post = SPECIAL_REMOTE_FS_TARGET;
- pre = SPECIAL_REMOTE_FS_PRE_TARGET;
- } else {
- post = SPECIAL_LOCAL_FS_TARGET;
- pre = SPECIAL_LOCAL_FS_PRE_TARGET;
+ if (path_equal(where, "/")) {
+ /* The root disk is not an option */
+ automount = false;
+ noauto = false;
+ nofail = false;
}
name = unit_name_from_path(where, ".mount");
- if (!name) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
+ if (!name)
+ return log_oom();
- unit = join(arg_dest, "/", name, NULL);
- if (!unit) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
+ unit = strjoin(arg_dest, "/", name, NULL);
+ if (!unit)
+ return log_oom();
f = fopen(unit, "wxe");
if (!f) {
- r = -errno;
- log_error("Failed to create unit file: %m");
- goto finish;
+ if (errno == EEXIST)
+ log_error("Failed to create mount unit file %s, as it already exists. Duplicate entry in /etc/fstab?", unit);
+ else
+ log_error("Failed to create unit file %s: %m", unit);
+ return -errno;
}
- fputs("# Automatically generated by systemd-fstab-generator\n\n"
- "[Unit]\n"
- "SourcePath=/etc/fstab\n"
- "DefaultDependencies=no\n", f);
-
- if (!path_equal(where, "/"))
- fprintf(f,
- "After=%s\n"
- "Wants=%s\n"
- "Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
- "Before=" SPECIAL_UMOUNT_TARGET "\n",
- pre,
- pre);
-
-
- if (!noauto && !nofail && !automount)
- fprintf(f,
- "Before=%s\n",
- post);
+ fprintf(f,
+ "# Automatically generated by systemd-fstab-generator\n\n"
+ "[Unit]\n"
+ "SourcePath=%s\n"
+ "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n",
+ source);
+
+ if (post && !noauto && !nofail && !automount)
+ fprintf(f, "Before=%s\n", post);
+
+ if (passno != 0) {
+ r = generator_write_fsck_deps(f, arg_dest, what, where, fstype);
+ if (r < 0)
+ return r;
+ }
fprintf(f,
"\n"
"[Mount]\n"
"What=%s\n"
- "Where=%s\n"
- "Type=%s\n"
- "FsckPassNo=%i\n",
+ "Where=%s\n",
what,
- where,
- me->mnt_type,
- me->mnt_passno);
+ where);
- if (!isempty(me->mnt_opts) &&
- !streq(me->mnt_opts, "defaults"))
- fprintf(f,
- "Options=%s\n",
- me->mnt_opts);
+ if (!isempty(fstype) && !streq(fstype, "auto"))
+ fprintf(f, "Type=%s\n", fstype);
+
+ if (!isempty(opts) && !streq(opts, "defaults"))
+ fprintf(f, "Options=%s\n", opts);
fflush(f);
if (ferror(f)) {
- log_error("Failed to write unit file: %m");
- r = -errno;
- goto finish;
+ log_error("Failed to write unit file %s: %m", unit);
+ return -errno;
}
- if (!noauto) {
- lnk = join(arg_dest, "/", post, nofail || automount ? ".wants/" : ".requires/", name, NULL);
- if (!lnk) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
+ if (!noauto && post) {
+ lnk = strjoin(arg_dest, "/", post, nofail || automount ? ".wants/" : ".requires/", name, NULL);
+ if (!lnk)
+ return log_oom();
- mkdir_parents(lnk, 0755);
+ mkdir_parents_label(lnk, 0755);
if (symlink(unit, lnk) < 0) {
- log_error("Failed to create symlink: %m");
- r = -errno;
- goto finish;
- }
-
- if (!isbind &&
- !path_equal(where, "/")) {
-
- r = device_name(what, &device);
- if (r < 0) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
-
- if (r > 0) {
- free(lnk);
- lnk = join(arg_dest, "/", device, ".wants/", name, NULL);
- if (!lnk) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
-
- mkdir_parents(lnk, 0755);
- if (symlink(unit, lnk) < 0) {
- log_error("Failed to creat symlink: %m");
- r = -errno;
- goto finish;
- }
- }
+ log_error("Failed to create symlink %s: %m", lnk);
+ return -errno;
}
}
- if (automount && !path_equal(where, "/")) {
+ if (automount) {
automount_name = unit_name_from_path(where, ".automount");
- if (!name) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
+ if (!automount_name)
+ return log_oom();
- automount_unit = join(arg_dest, "/", automount_name, NULL);
- if (!automount_unit) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
+ automount_unit = strjoin(arg_dest, "/", automount_name, NULL);
+ if (!automount_unit)
+ return log_oom();
fclose(f);
f = fopen(automount_unit, "wxe");
if (!f) {
- r = -errno;
- log_error("Failed to create unit file: %m");
- goto finish;
+ log_error("Failed to create unit file %s: %m", automount_unit);
+ return -errno;
}
fprintf(f,
"# Automatically generated by systemd-fstab-generator\n\n"
"[Unit]\n"
- "SourcePath=/etc/fstab\n"
- "DefaultDependencies=no\n"
- "Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
- "Before=" SPECIAL_UMOUNT_TARGET " %s\n"
- "\n"
+ "SourcePath=%s\n"
+ "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n",
+ source);
+
+ if (post)
+ fprintf(f,
+ "Before=%s\n",
+ post);
+
+ fprintf(f,
"[Automount]\n"
"Where=%s\n",
- post,
where);
fflush(f);
if (ferror(f)) {
- log_error("Failed to write unit file: %m");
- r = -errno;
- goto finish;
+ log_error("Failed to write unit file %s: %m", automount_unit);
+ return -errno;
}
free(lnk);
- lnk = join(arg_dest, "/", post, nofail ? ".wants/" : ".requires/", automount_name, NULL);
- if (!lnk) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
+ lnk = strjoin(arg_dest, "/", post, nofail ? ".wants/" : ".requires/", automount_name, NULL);
+ if (!lnk)
+ return log_oom();
- mkdir_parents(lnk, 0755);
+ mkdir_parents_label(lnk, 0755);
if (symlink(automount_unit, lnk) < 0) {
- log_error("Failed to create symlink: %m");
- r = -errno;
- goto finish;
+ log_error("Failed to create symlink %s: %m", lnk);
+ return -errno;
}
}
- r = 0;
-finish:
- if (f)
- fclose(f);
-
- free(unit);
- free(lnk);
- free(name);
- free(device);
- free(automount_name);
- free(automount_unit);
-
- return r;
+ return 0;
}
-static int parse_fstab(void) {
- FILE *f;
- int r = 0;
+static int parse_fstab(bool initrd) {
+ _cleanup_endmntent_ FILE *f = NULL;
+ const char *fstab_path;
struct mntent *me;
+ int r = 0;
- errno = 0;
- f = setmntent("/etc/fstab", "r");
+ fstab_path = initrd ? "/sysroot/etc/fstab" : "/etc/fstab";
+ f = setmntent(fstab_path, "re");
if (!f) {
if (errno == ENOENT)
return 0;
- log_error("Failed to open /etc/fstab: %m");
+ log_error("Failed to open %s: %m", fstab_path);
return -errno;
}
while ((me = getmntent(f))) {
- char *where, *what;
+ _cleanup_free_ char *where = NULL, *what = NULL;
int k;
+ if (initrd && !mount_in_initrd(me))
+ continue;
+
what = fstab_node_to_udev_node(me->mnt_fsname);
- if (!what) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
+ if (!what)
+ return log_oom();
- where = strdup(me->mnt_dir);
- if (!where) {
- log_error("Out of memory");
- free(what);
- r = -ENOMEM;
- goto finish;
+ if (detect_container(NULL) > 0 && is_device_path(what)) {
+ log_info("Running in a container, ignoring fstab device entry for %s.", what);
+ continue;
}
- if (is_path(what))
- path_kill_slashes(what);
+ where = initrd ? strappend("/sysroot/", me->mnt_dir) : strdup(me->mnt_dir);
+ if (!where)
+ return log_oom();
if (is_path(where))
path_kill_slashes(where);
if (streq(me->mnt_type, "swap"))
k = add_swap(what, me);
- else
- k = add_mount(what, where, me);
-
- free(what);
- free(where);
+ else {
+ bool noauto, nofail, automount;
+ const char *post;
+
+ noauto = !!hasmntopt(me, "noauto");
+ nofail = !!hasmntopt(me, "nofail");
+ automount =
+ hasmntopt(me, "comment=systemd.automount") ||
+ hasmntopt(me, "x-systemd.automount");
+
+ if (initrd)
+ post = SPECIAL_INITRD_FS_TARGET;
+ else if (mount_in_initrd(me))
+ post = SPECIAL_INITRD_ROOT_FS_TARGET;
+ else if (mount_is_network(me))
+ post = SPECIAL_REMOTE_FS_TARGET;
+ else
+ post = SPECIAL_LOCAL_FS_TARGET;
+
+ k = add_mount(what,
+ where,
+ me->mnt_type,
+ me->mnt_opts,
+ me->mnt_passno,
+ noauto,
+ nofail,
+ automount,
+ post,
+ fstab_path);
+ }
if (k < 0)
r = k;
}
-finish:
- endmntent(f);
return r;
}
-int main(int argc, char *argv[]) {
+static int add_root_mount(void) {
+ _cleanup_free_ char *what = NULL;
+ const char *opts;
+
+ if (isempty(arg_root_what)) {
+ log_debug("Could not find a root= entry on the kernel commandline.");
+ return 0;
+ }
+
+ what = fstab_node_to_udev_node(arg_root_what);
+ if (!path_is_absolute(what)) {
+ log_debug("Skipping entry what=%s where=/sysroot type=%s", what, strna(arg_root_fstype));
+ return 0;
+ }
+
+ if (!arg_root_options)
+ opts = arg_root_rw > 0 ? "rw" : "ro";
+ else if (arg_root_rw >= 0 ||
+ (!mount_test_option(arg_root_options, "ro") &&
+ !mount_test_option(arg_root_options, "rw")))
+ opts = strappenda3(arg_root_options, ",", arg_root_rw > 0 ? "rw" : "ro");
+ else
+ opts = arg_root_options;
+
+ log_debug("Found entry what=%s where=/sysroot type=%s", what, strna(arg_root_fstype));
+ return add_mount(what,
+ "/sysroot",
+ arg_root_fstype,
+ opts,
+ 1,
+ false,
+ false,
+ false,
+ SPECIAL_INITRD_ROOT_FS_TARGET,
+ "/proc/cmdline");
+}
+
+static int parse_proc_cmdline_item(const char *key, const char *value) {
int r;
+ /* root= and roofstype= may occur more than once, the last
+ * instance should take precedence. In the case of multiple
+ * rootflags= the arguments should be concatenated */
+
+ if (STR_IN_SET(key, "fstab", "rd.fstab") && value) {
+
+ r = parse_boolean(value);
+ if (r < 0)
+ log_warning("Failed to parse fstab switch %s. Ignoring.", value);
+ else
+ arg_fstab_enabled = r;
+
+ } else if (streq(key, "root") && value) {
+
+ free(arg_root_what);
+ arg_root_what = strdup(value);
+ if (!arg_root_what)
+ return log_oom();
+
+ } else if (streq(key, "rootfstype") && value) {
+
+ free(arg_root_fstype);
+ arg_root_fstype = strdup(value);
+ if (!arg_root_fstype)
+ return log_oom();
+
+ } else if (streq(key, "rootflags") && value) {
+ char *o;
+
+ o = arg_root_options ?
+ strjoin(arg_root_options, ",", value, NULL) :
+ strdup(value);
+ if (!o)
+ return log_oom();
+
+ free(arg_root_options);
+ arg_root_options = o;
+
+ } else if (streq(key, "rw") && !value)
+ arg_root_rw = true;
+ else if (streq(key, "ro") && !value)
+ arg_root_rw = false;
+
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+ int r = 0;
+
if (argc > 1 && argc != 4) {
log_error("This program takes three or no arguments.");
return EXIT_FAILURE;
umask(0022);
- r = parse_fstab();
+ if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
+ return EXIT_FAILURE;
+
+ /* Always honour root= in the kernel command line if we are in an initrd */
+ if (in_initrd())
+ r = add_root_mount();
+
+ /* Honour /etc/fstab only when that's enabled */
+ if (arg_fstab_enabled) {
+ int k;
+
+ log_debug("Parsing /etc/fstab");
+
+ /* Parse the local /etc/fstab, possibly from the initrd */
+ k = parse_fstab(false);
+ if (k < 0)
+ r = k;
+
+ /* If running in the initrd also parse the /etc/fstab from the host */
+ if (in_initrd()) {
+ log_debug("Parsing /sysroot/etc/fstab");
+
+ k = parse_fstab(true);
+ if (k < 0)
+ r = k;
+ }
+ }
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
~ianmdlvl / elogind.git / blobdiff