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authorLennart Poettering <lennart@poettering.net>2014-03-05 22:26:10 +0100
committerLennart Poettering <lennart@poettering.net>2014-03-06 04:00:41 +0100
commite48fdd84432bbf9c2ecc339183258c7c33116032 (patch)
treef4726a824d9a497accf80489a3df50b09ece0af0 /src/gpt-auto-generator/gpt-auto-generator.c
parent848e3e24b00a61130f20226ef5f051433d478c69 (diff)
generators: rework mount generators
- Add support for finding and mounting /srv based on GPT data, similar to how we already handly /home. - Share the fsck logic between GPT, EFI and fstab generators - Make sure we never run the EFI generator inside containers - Drop DefaultDependencies=no from EFI mount units - Other fixes
Diffstat (limited to 'src/gpt-auto-generator/gpt-auto-generator.c')
-rw-r--r--src/gpt-auto-generator/gpt-auto-generator.c155
1 files changed, 90 insertions, 65 deletions
diff --git a/src/gpt-auto-generator/gpt-auto-generator.c b/src/gpt-auto-generator/gpt-auto-generator.c
index 05934da82f..f34cd030c2 100644
--- a/src/gpt-auto-generator/gpt-auto-generator.c
+++ b/src/gpt-auto-generator/gpt-auto-generator.c
@@ -40,6 +40,8 @@
#include "special.h"
#include "unit-name.h"
#include "virt.h"
+#include "generator.h"
+#include "gpt.h"
/* TODO:
*
@@ -49,9 +51,6 @@
*
*/
-#define GPT_SWAP SD_ID128_MAKE(06,57,fd,6d,a4,ab,43,c4,84,e5,09,33,c8,4b,4f,4f)
-#define GPT_HOME SD_ID128_MAKE(93,3a,c7,e1,2e,b4,4f,13,b8,44,0e,14,e2,ae,f9,15)
-
static const char *arg_dest = "/tmp";
DEFINE_TRIVIAL_CLEANUP_FUNC(blkid_probe, blkid_free_probe);
@@ -152,10 +151,6 @@ static int add_swap(const char *path, const char *fstype) {
fprintf(f,
"# Automatically generated by systemd-gpt-auto-generator\n\n"
- "[Unit]\n"
- "DefaultDependencies=no\n"
- "Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
- "Before=" SPECIAL_UMOUNT_TARGET " " SPECIAL_SWAP_TARGET "\n\n"
"[Swap]\n"
"What=%s\n",
path);
@@ -179,42 +174,49 @@ static int add_swap(const char *path, const char *fstype) {
return 0;
}
-static int add_home(const char *path, const char *fstype) {
- _cleanup_free_ char *unit = NULL, *lnk = NULL, *fsck = NULL;
+static int add_mount(const char *what, const char *where, const char *fstype, const char *description) {
+ _cleanup_free_ char *unit = NULL, *lnk = NULL, *p = NULL;
_cleanup_fclose_ FILE *f = NULL;
+ int r;
- if (dir_is_empty("/home") <= 0)
+ if (dir_is_empty(where) <= 0) {
+ log_debug("%s already populated, ignoring.", where);
return 0;
+ }
- log_debug("Adding home: %s %s", path, fstype);
+ log_debug("Adding %s: %s %s", where, what, fstype);
- unit = strappend(arg_dest, "/home.mount");
+ unit = unit_name_from_path(where, ".mount");
if (!unit)
return log_oom();
- f = fopen(unit, "wxe");
+ p = strjoin(arg_dest, "/", unit, NULL);
+ if (!p)
+ return log_oom();
+
+ f = fopen(p, "wxe");
if (!f) {
log_error("Failed to create unit file %s: %m", unit);
return -errno;
}
- fsck = unit_name_from_path_instance("systemd-fsck", path, ".service");
- if (!fsck)
- return log_oom();
-
fprintf(f,
"# Automatically generated by systemd-gpt-auto-generator\n\n"
"[Unit]\n"
- "DefaultDependencies=no\n"
- "Requires=%s\n"
- "After=" SPECIAL_LOCAL_FS_PRE_TARGET " %s\n"
- "Conflicts=" SPECIAL_UMOUNT_TARGET "\n"
- "Before=" SPECIAL_UMOUNT_TARGET " " SPECIAL_LOCAL_FS_TARGET "\n\n"
+ "Description=%s\n",
+ description);
+
+ 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=/home\n"
+ "Where=%s\n"
"Type=%s\n",
- fsck, fsck, path, fstype);
+ what, where, fstype);
fflush(f);
if (ferror(f)) {
@@ -222,7 +224,7 @@ static int add_home(const char *path, const char *fstype) {
return -errno;
}
- lnk = strjoin(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".requires/home.mount", NULL);
+ lnk = strjoin(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".requires/", unit, NULL);
if (!lnk)
return log_oom();
@@ -236,12 +238,12 @@ static int add_home(const char *path, const char *fstype) {
}
static int enumerate_partitions(struct udev *udev, dev_t dev) {
- struct udev_device *parent = NULL;
_cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
_cleanup_udev_device_unref_ struct udev_device *d = NULL;
+ _cleanup_free_ char *home = NULL, *home_fstype = NULL, *srv = NULL, *srv_fstype = NULL;
+ unsigned home_nr = (unsigned) -1, srv_nr = (unsigned )-1;
struct udev_list_entry *first, *item;
- unsigned home_nr = (unsigned) -1;
- _cleanup_free_ char *home = NULL, *home_fstype = NULL;
+ struct udev_device *parent = NULL;
int r;
e = udev_enumerate_new(udev);
@@ -266,16 +268,15 @@ static int enumerate_partitions(struct udev *udev, dev_t dev) {
r = udev_enumerate_scan_devices(e);
if (r < 0) {
- log_error("Failed to enumerate partitions on /dev/block/%u:%u: %s",
- major(dev), minor(dev), strerror(-r));
+ log_error("Failed to enumerate partitions on /dev/block/%u:%u: %s", major(dev), minor(dev), strerror(-r));
return r;
}
first = udev_enumerate_get_list_entry(e);
udev_list_entry_foreach(item, first) {
+ _cleanup_udev_device_unref_ struct udev_device *q;
_cleanup_free_ char *fstype = NULL;
const char *node = NULL;
- _cleanup_udev_device_unref_ struct udev_device *q;
sd_id128_t type_id;
unsigned nr;
@@ -298,8 +299,7 @@ static int enumerate_partitions(struct udev *udev, dev_t dev) {
/* skip child devices which are not detected properly */
if (r == -EBADSLT)
continue;
- log_error("Failed to verify GPT partition %s: %s",
- node, strerror(-r));
+ log_error("Failed to verify GPT partition %s: %s", node, strerror(-r));
return r;
}
if (r == 0)
@@ -307,24 +307,48 @@ static int enumerate_partitions(struct udev *udev, dev_t dev) {
if (sd_id128_equal(type_id, GPT_SWAP))
add_swap(node, fstype);
+
else if (sd_id128_equal(type_id, GPT_HOME)) {
- if (!home || nr < home_nr) {
- free(home);
- home = strdup(node);
- if (!home)
- return log_oom();
-
- home_nr = nr;
-
- free(home_fstype);
- home_fstype = fstype;
- fstype = NULL;
- }
+
+ /* We only care for the first /home partition */
+ if (home && nr >= home_nr)
+ continue;
+
+ home_nr = nr;
+
+ free(home);
+ home = strdup(node);
+ if (!home)
+ return log_oom();
+
+ free(home_fstype);
+ home_fstype = fstype;
+ fstype = NULL;
+
+ } else if (sd_id128_equal(type_id, GPT_SRV)) {
+
+ /* We only care for the first /srv partition */
+ if (srv && nr >= srv_nr)
+ continue;
+
+ srv_nr = nr;
+
+ free(srv);
+ srv = strdup(node);
+ if (!srv)
+ return log_oom();
+
+ free(srv_fstype);
+ srv_fstype = fstype;
+ fstype = NULL;
}
}
if (home && home_fstype)
- add_home(home, home_fstype);
+ add_mount(home, "/home", home_fstype, "Home Partition");
+
+ if (srv && srv_fstype)
+ add_mount(srv, "/srv", srv_fstype, "Server Data Partition");
return r;
}
@@ -384,7 +408,7 @@ static int get_block_device(const char *path, dev_t *dev) {
assert(path);
assert(dev);
- if (lstat("/", &st))
+ if (lstat(path, &st))
return -errno;
if (major(st.st_dev) != 0) {
@@ -392,7 +416,7 @@ static int get_block_device(const char *path, dev_t *dev) {
return 1;
}
- if (statfs("/", &sfs) < 0)
+ if (statfs(path, &sfs) < 0)
return -errno;
if (F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC))
@@ -423,15 +447,14 @@ static int devno_to_devnode(struct udev *udev, dev_t devno, char **ret) {
}
int main(int argc, char *argv[]) {
- _cleanup_free_ char *node = NULL;
_cleanup_udev_unref_ struct udev *udev = NULL;
+ _cleanup_free_ char *node = NULL;
dev_t devno;
int r = 0;
if (argc > 1 && argc != 4) {
log_error("This program takes three or no arguments.");
- r = -EINVAL;
- goto finish;
+ return EXIT_FAILURE;
}
if (argc > 1)
@@ -445,34 +468,33 @@ int main(int argc, char *argv[]) {
if (in_initrd()) {
log_debug("In initrd, exiting.");
- goto finish;
+ return EXIT_SUCCESS;
}
if (detect_container(NULL) > 0) {
log_debug("In a container, exiting.");
- goto finish;
+ return EXIT_SUCCESS;
}
r = get_block_device("/", &devno);
if (r < 0) {
log_error("Failed to determine block device of root file system: %s", strerror(-r));
- goto finish;
- }
- if (r == 0) {
+ return EXIT_FAILURE;
+ } else if (r == 0) {
log_debug("Root file system not on a (single) block device.");
- goto finish;
+ return EXIT_SUCCESS;
}
udev = udev_new();
if (!udev) {
- r = log_oom();
- goto finish;
+ log_oom();
+ return EXIT_FAILURE;
}
r = devno_to_devnode(udev, devno, &node);
if (r < 0) {
log_error("Failed to determine block device node from major/minor: %s", strerror(-r));
- goto finish;
+ return EXIT_FAILURE;
}
log_debug("Root device %s.", node);
@@ -480,13 +502,16 @@ int main(int argc, char *argv[]) {
r = verify_gpt_partition(node, NULL, NULL, NULL);
if (r < 0) {
log_error("Failed to verify GPT partition %s: %s", node, strerror(-r));
- goto finish;
+ return EXIT_FAILURE;
+ }
+ if (r == 0) {
+ log_debug("Not a GPT disk, exiting.");
+ return EXIT_SUCCESS;
}
- if (r == 0)
- goto finish;
r = enumerate_partitions(udev, devno);
+ if (r < 0)
+ return EXIT_FAILURE;
-finish:
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+ return EXIT_SUCCESS;
}