X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Ffstab-generator%2Ffstab-generator.c;h=d5f9db49ca8b6016afd34bb5548070bad0ee5067;hp=6766d445ca008252b347f4e92eb3f85887cd093a;hb=790838e4f16831f2bb06aeb845b9e2fb0f1d28dd;hpb=5e398e546ea65751e6a774daf828fe06f74434a2

diff --git a/src/fstab-generator/fstab-generator.c b/src/fstab-generator/fstab-generator.c
index 6766d445c..d5f9db49c 100644
--- a/src/fstab-generator/fstab-generator.c
+++ b/src/fstab-generator/fstab-generator.c
@@ -33,6 +33,7 @@
 #include "special.h"
 #include "mkdir.h"
 #include "virt.h"
+#include "fileio.h"
 
 static const char *arg_dest = "/tmp";
 static bool arg_enabled = true;
@@ -79,8 +80,8 @@ static int mount_find_pri(struct mntent *me, int *ret) {
 }
 
 static int add_swap(const char *what, struct mntent *me) {
-        char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL;
-        FILE *f = NULL;
+        char _cleanup_free_ *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL;
+        FILE _cleanup_fclose_ *f = NULL;
         bool noauto, nofail;
         int r, pri = -1;
 
@@ -97,25 +98,20 @@ static int add_swap(const char *what, struct mntent *me) {
         nofail = !!hasmntopt(me, "nofail");
 
         name = unit_name_from_path(what, ".swap");
-        if (!name) {
-                r = log_oom();
-                goto finish;
-        }
+        if (!name)
+                return log_oom();
 
         unit = strjoin(arg_dest, "/", name, NULL);
-        if (!unit) {
-                r = log_oom();
-                goto finish;
-        }
+        if (!unit)
+                return log_oom();
 
         f = fopen(unit, "wxe");
         if (!f) {
-                r = -errno;
                 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);
-                goto finish;
+                return -errno;
         }
 
         fputs("# Automatically generated by systemd-fstab-generator\n\n"
@@ -142,56 +138,39 @@ static int add_swap(const char *what, struct mntent *me) {
         fflush(f);
         if (ferror(f)) {
                 log_error("Failed to write unit file %s: %m", unit);
-                r = -errno;
-                goto finish;
+                return -errno;
         }
 
         if (!noauto) {
                 lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL);
-                if (!lnk) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (!lnk)
+                        return log_oom();
 
                 mkdir_parents_label(lnk, 0755);
                 if (symlink(unit, lnk) < 0) {
                         log_error("Failed to create symlink %s: %m", lnk);
-                        r = -errno;
-                        goto finish;
+                        return -errno;
                 }
 
                 r = device_name(what, &device);
                 if (r < 0)
-                        goto finish;
+                        return r;
 
                 if (r > 0) {
                         free(lnk);
                         lnk = strjoin(arg_dest, "/", device, ".wants/", name, NULL);
-                        if (!lnk) {
-                                r = log_oom();
-                                goto finish;
-                        }
+                        if (!lnk)
+                                return log_oom();
 
                         mkdir_parents_label(lnk, 0755);
                         if (symlink(unit, lnk) < 0) {
                                 log_error("Failed to create symlink %s: %m", lnk);
-                                r = -errno;
-                                goto finish;
+                                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) {
@@ -199,7 +178,9 @@ static bool mount_is_bind(struct mntent *me) {
 
         return
                 hasmntopt(me, "bind") ||
-                streq(me->mnt_type, "bind");
+                streq(me->mnt_type, "bind") ||
+                hasmntopt(me, "rbind") ||
+                streq(me->mnt_type, "rbind");
 }
 
 static bool mount_is_network(struct mntent *me) {
@@ -210,13 +191,28 @@ static bool mount_is_network(struct mntent *me) {
                 fstype_is_network(me->mnt_type);
 }
 
+static bool mount_in_initrd(struct mntent *me) {
+        assert(me);
+
+        return
+                hasmntopt(me, "x-initrd.mount") ||
+                streq(me->mnt_dir, "/usr");
+}
+
+static bool mount_is_rootfs(struct mntent *me) {
+        assert(me);
+
+        return hasmntopt(me, "x-initrd.rootfs");
+}
+
 static int add_mount(const char *what, const char *where, const char *type, const char *opts,
-                     int passno, bool wait, bool noauto, bool nofail, bool automount, bool isbind, bool isnetwork,
-                     const char *source) {
-        char *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL, *automount_name = NULL, *automount_unit = NULL;
-        FILE *f = NULL;
+                     int passno, bool noauto, bool nofail, bool automount, bool isbind,
+                     const char *pre, const char *post, const char *source) {
+        char _cleanup_free_
+                *name = NULL, *unit = NULL, *lnk = NULL, *device = NULL,
+                *automount_name = NULL, *automount_unit = NULL;
+        FILE _cleanup_fclose_ *f = NULL;
         int r;
-        const char *post, *pre;
 
         assert(what);
         assert(where);
@@ -236,34 +232,21 @@ static int add_mount(const char *what, const char *where, const char *type, cons
             mount_point_ignore(where))
                 return 0;
 
-        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;
-        }
-
         name = unit_name_from_path(where, ".mount");
-        if (!name) {
-                r = log_oom();
-                goto finish;
-        }
+        if (!name)
+                return log_oom();
 
         unit = strjoin(arg_dest, "/", name, NULL);
-        if (!unit) {
-                r = log_oom();
-                goto finish;
-        }
+        if (!unit)
+                return log_oom();
 
         f = fopen(unit, "wxe");
         if (!f) {
-                r = -errno;
                 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);
-                goto finish;
+                return -errno;
         }
 
         fprintf(f,
@@ -273,17 +256,19 @@ static int add_mount(const char *what, const char *where, const char *type, cons
               "DefaultDependencies=no\n",
               source);
 
-        if (!path_equal(where, "/"))
+        if (!path_equal(where, "/")) {
+                if (pre)
+                        fprintf(f,
+                                "After=%s\n"
+                                "Wants=%s\n",
+                                pre,
+                                pre);
                 fprintf(f,
-                        "After=%s\n"
-                        "Wants=%s\n"
                         "Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
-                        "Before=" SPECIAL_UMOUNT_TARGET "\n",
-                        pre,
-                        pre);
-
+                        "Before=" SPECIAL_UMOUNT_TARGET "\n");
+        }
 
-        if (!noauto && !nofail && !automount)
+        if (post && !noauto && !nofail && !automount)
                 fprintf(f,
                         "Before=%s\n",
                         post);
@@ -306,29 +291,23 @@ static int add_mount(const char *what, const char *where, const char *type, cons
                         "Options=%s\n",
                         opts);
 
-        if (wait)
-                fprintf(f,
-                        "TimeoutSec=0\n");
-
         fflush(f);
         if (ferror(f)) {
                 log_error("Failed to write unit file %s: %m", unit);
-                r = -errno;
-                goto finish;
+                return -errno;
         }
 
         if (!noauto) {
-                lnk = strjoin(arg_dest, "/", post, nofail || automount ? ".wants/" : ".requires/", name, NULL);
-                if (!lnk) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (post) {
+                        lnk = strjoin(arg_dest, "/", post, nofail || automount ? ".wants/" : ".requires/", name, NULL);
+                        if (!lnk)
+                                return log_oom();
 
-                mkdir_parents_label(lnk, 0755);
-                if (symlink(unit, lnk) < 0) {
-                        log_error("Failed to create symlink %s: %m", lnk);
-                        r = -errno;
-                        goto finish;
+                        mkdir_parents_label(lnk, 0755);
+                        if (symlink(unit, lnk) < 0) {
+                                log_error("Failed to create symlink %s: %m", lnk);
+                                return -errno;
+                        }
                 }
 
                 if (!isbind &&
@@ -336,21 +315,18 @@ static int add_mount(const char *what, const char *where, const char *type, cons
 
                         r = device_name(what, &device);
                         if (r < 0)
-                                goto finish;
+                                return r;
 
                         if (r > 0) {
                                 free(lnk);
                                 lnk = strjoin(arg_dest, "/", device, ".wants/", name, NULL);
-                                if (!lnk) {
-                                        r = log_oom();
-                                        goto finish;
-                                }
+                                if (!lnk)
+                                        return log_oom();
 
                                 mkdir_parents_label(lnk, 0755);
                                 if (symlink(unit, lnk) < 0) {
                                         log_error("Failed to create symlink %s: %m", lnk);
-                                        r = -errno;
-                                        goto finish;
+                                        return -errno;
                                 }
                         }
                 }
@@ -358,104 +334,88 @@ static int add_mount(const char *what, const char *where, const char *type, cons
 
         if (automount && !path_equal(where, "/")) {
                 automount_name = unit_name_from_path(where, ".automount");
-                if (!name) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (!name)
+                        return log_oom();
 
                 automount_unit = strjoin(arg_dest, "/", automount_name, NULL);
-                if (!automount_unit) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (!automount_unit)
+                        return log_oom();
 
                 fclose(f);
                 f = fopen(automount_unit, "wxe");
                 if (!f) {
-                        r = -errno;
                         log_error("Failed to create unit file %s: %m", automount_unit);
-                        goto finish;
+                        return -errno;
                 }
 
                 fprintf(f,
                         "# Automatically generated by systemd-fstab-generator\n\n"
                         "[Unit]\n"
-                        "SourcePath=/etc/fstab\n"
+                        "SourcePath=%s\n"
                         "DefaultDependencies=no\n"
                         "Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
-                        "Before=" SPECIAL_UMOUNT_TARGET " %s\n"
-                        "\n"
+                        "Before=" SPECIAL_UMOUNT_TARGET "\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 %s: %m", automount_unit);
-                        r = -errno;
-                        goto finish;
+                        return -errno;
                 }
 
                 free(lnk);
                 lnk = strjoin(arg_dest, "/", post, nofail ? ".wants/" : ".requires/", automount_name, NULL);
-                if (!lnk) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (!lnk)
+                        return log_oom();
 
                 mkdir_parents_label(lnk, 0755);
                 if (symlink(automount_unit, lnk) < 0) {
                         log_error("Failed to create symlink %s: %m", lnk);
-                        r = -errno;
-                        goto finish;
+                        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) {
+static int parse_fstab(const char *prefix, bool initrd) {
         FILE *f;
+        _cleanup_free_ char *fstab_path = NULL;
         int r = 0;
         struct mntent *me;
 
         errno = 0;
-        f = setmntent("/etc/fstab", "r");
+        fstab_path = strjoin(prefix, "/etc/fstab", NULL);
+        f = setmntent(fstab_path, "r");
         if (!f) {
                 if (errno == ENOENT)
                         return 0;
 
-                log_error("Failed to open /etc/fstab: %m");
+                log_error("Failed to open %s/etc/fstab: %m", prefix);
                 return -errno;
         }
 
         while ((me = getmntent(f))) {
-                char *where, *what;
+                char _cleanup_free_ *where = NULL, *what = NULL;
                 int k;
 
-                what = fstab_node_to_udev_node(me->mnt_fsname);
-                if (!what) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (initrd && !mount_in_initrd(me))
+                        continue;
 
-                where = strdup(me->mnt_dir);
-                if (!where) {
+                what = fstab_node_to_udev_node(me->mnt_fsname);
+                where = strjoin(prefix, me->mnt_dir, NULL);
+                if (!what || !where) {
                         r = log_oom();
-                        free(what);
                         goto finish;
                 }
 
@@ -467,7 +427,8 @@ static int parse_fstab(void) {
                 if (streq(me->mnt_type, "swap"))
                         k = add_swap(what, me);
                 else {
-                        bool noauto, nofail, automount, isbind, isnetwork;
+                        bool noauto, nofail, automount, isbind;
+                        const char *pre, *post;
 
                         noauto = !!hasmntopt(me, "noauto");
                         nofail = !!hasmntopt(me, "nofail");
@@ -475,17 +436,26 @@ static int parse_fstab(void) {
                                   hasmntopt(me, "comment=systemd.automount") ||
                                   hasmntopt(me, "x-systemd.automount");
                         isbind = mount_is_bind(me);
-                        isnetwork = mount_is_network(me);
+
+                        if (initrd) {
+                                post = SPECIAL_INITRD_FS_TARGET;
+                                pre = NULL;
+                        } else if (mount_is_rootfs(me)) {
+                                post = SPECIAL_INITRD_ROOT_FS_TARGET;
+                                pre = NULL;
+                        } else if (mount_is_network(me)) {
+                                post = SPECIAL_REMOTE_FS_TARGET;
+                                pre = SPECIAL_REMOTE_FS_PRE_TARGET;
+                        } else {
+                                post = SPECIAL_LOCAL_FS_TARGET;
+                                pre = SPECIAL_LOCAL_FS_PRE_TARGET;
+                        }
 
                         k = add_mount(what, where, me->mnt_type, me->mnt_opts,
-                                     me->mnt_passno, false, noauto, nofail,
-                                     automount, isbind, isnetwork,
-                                     "/etc/fstab");
+                                     me->mnt_passno, noauto, nofail, automount,
+                                     isbind, pre, post, fstab_path);
                 }
 
-                free(what);
-                free(where);
-
                 if (k < 0)
                         r = k;
         }
@@ -500,7 +470,6 @@ static int parse_new_root_from_proc_cmdline(void) {
         _cleanup_free_ char *what = NULL, *type = NULL, *opts = NULL, *line = NULL;
         int r;
         size_t l;
-        bool wait = false;
 
         r = read_one_line_file("/proc/cmdline", &line);
         if (r < 0) {
@@ -508,15 +477,13 @@ static int parse_new_root_from_proc_cmdline(void) {
                 return 0;
         }
 
-        opts = strdup("defaults");
-        if (!opts)
-                return log_oom();
+        opts = strdup("ro");
         type = strdup("auto");
-        if (!type)
+        if (!opts || !type)
                 return log_oom();
 
-	/* 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 */
+        /* 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 */
         FOREACH_WORD_QUOTED(w, l, line, state) {
                 char *word, *tmp_word;
 
@@ -550,29 +517,31 @@ static int parse_new_root_from_proc_cmdline(void) {
                         if (!opts)
                                 return log_oom();
 
-                } else if (streq(word, "rootwait"))
-                        wait = true;
+                }
 
                 free(word);
         }
 
-        if (what) {
-
-                log_debug("Found entry what=%s where=/new_root type=%s", what, type);
-                r = add_mount(what, "/new_root", type, opts, 0, wait, false, false,
-                              false, false, false, "/proc/cmdline");
-
-                if (r < 0)
-                        return r;
-        } else
+        if (!what) {
                 log_error("Could not find a root= entry on the kernel commandline.");
+                return 0;
         }
 
-        return 0;
+        if (what[0] != '/') {
+                log_debug("Skipping entry what=%s where=/sysroot type=%s", what, type);
+                return 0;
+        }
+
+        log_debug("Found entry what=%s where=/sysroot type=%s", what, type);
+        r = add_mount(what, "/sysroot", type, opts, 0, false, false, false,
+                      false, NULL, SPECIAL_INITRD_ROOT_FS_TARGET, "/proc/cmdline");
+
+        return (r < 0) ? r : 0;
 }
 
 static int parse_proc_cmdline(void) {
-        char *line, *w, *state;
+        char _cleanup_free_ *line = NULL;
+        char *w, *state;
         int r;
         size_t l;
 
@@ -586,13 +555,11 @@ static int parse_proc_cmdline(void) {
         }
 
         FOREACH_WORD_QUOTED(w, l, line, state) {
-                char *word;
+                char _cleanup_free_ *word = NULL;
 
                 word = strndup(w, l);
-                if (!word) {
-                        r = log_oom();
-                        goto finish;
-                }
+                if (!word)
+                        return log_oom();
 
                 if (startswith(word, "fstab=")) {
                         r = parse_boolean(word + 6);
@@ -616,19 +583,13 @@ static int parse_proc_cmdline(void) {
 
                         log_warning("Unknown kernel switch %s. Ignoring.", word);
                 }
-
-                free(word);
         }
 
-        r = 0;
-
-finish:
-        free(line);
-        return r;
+        return 0;
 }
 
 int main(int argc, char *argv[]) {
-        int r, k = 0;
+        int r = 0, k, l = 0;
 
         if (argc > 1 && argc != 4) {
                 log_error("This program takes three or no arguments.");
@@ -648,12 +609,15 @@ int main(int argc, char *argv[]) {
                 return EXIT_FAILURE;
 
         if (in_initrd())
-                k = parse_new_root_from_proc_cmdline();
+                r = parse_new_root_from_proc_cmdline();
 
         if (!arg_enabled)
-                return EXIT_SUCCESS;
+                return (r < 0) ? EXIT_FAILURE : EXIT_SUCCESS;
+
+        k = parse_fstab("", false);
 
-        r = parse_fstab();
+        if (in_initrd())
+                l = parse_fstab("/sysroot", true);
 
-        return (r < 0) || (k < 0) ? EXIT_FAILURE : EXIT_SUCCESS;
+        return (r < 0) || (k < 0) || (l < 0) ? EXIT_FAILURE : EXIT_SUCCESS;
 }