diff options
author | Karel Zak | 2009-10-26 13:33:03 +0100 |
---|---|---|
committer | Karel Zak | 2009-10-26 13:33:03 +0100 |
commit | a992137b7b8720600c99917af87f0e4cddad8682 (patch) | |
tree | 58a399775862e76292e5673c75e4c89b8280bd42 /shlibs | |
parent | libblkid: convert GPT partition LBA to 512-byte sectors (diff) | |
download | kernel-qcow2-util-linux-a992137b7b8720600c99917af87f0e4cddad8682.tar.gz kernel-qcow2-util-linux-a992137b7b8720600c99917af87f0e4cddad8682.tar.xz kernel-qcow2-util-linux-a992137b7b8720600c99917af87f0e4cddad8682.zip |
mount: and libblkid: covert /dev/dm-N to /dev/mapper/<name>
* mount(8) uses private device-mapper names in mtab
* libblkid returns private device-mapper names when evaluate udev
/dev/disk-by symlinks.
* on systems where DM is fully integrated with udev the /dev/mapper/<name>
files are symlinks to /dev/dm-N. It means we need a special care to hide
private device-mapper names.
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'shlibs')
-rw-r--r-- | shlibs/blkid/src/devname.c | 27 |
1 files changed, 2 insertions, 25 deletions
diff --git a/shlibs/blkid/src/devname.c b/shlibs/blkid/src/devname.c index fe0d1b332..d048c7222 100644 --- a/shlibs/blkid/src/devname.c +++ b/shlibs/blkid/src/devname.c @@ -38,6 +38,7 @@ #include <time.h> #include "blkidP.h" +#include "canonicalize.h" /* $(top_srcdir)/include */ /* * Find a dev struct in the cache by device name, if available. @@ -153,30 +154,6 @@ static int is_dm_leaf(const char *devname) } /* - * Since 2.6.29 (patch 784aae735d9b0bba3f8b9faef4c8b30df3bf0128) kernel sysfs - * provides the real DM device names in /sys/block/<ptname>/dm/name - */ -static char *get_dm_name(const char *ptname) -{ - FILE *f; - size_t sz; - char path[256], name[256], *res = NULL; - - snprintf(path, sizeof(path), "/sys/block/%s/dm/name", ptname); - if ((f = fopen(path, "r")) == NULL) - return NULL; - - /* read "<name>\n" from sysfs */ - if (fgets(name, sizeof(name), f) && (sz = strlen(name)) > 1) { - name[sz - 1] = '\0'; - snprintf(path, sizeof(path), "/dev/mapper/%s", name); - res = blkid_strdup(path); - } - fclose(f); - return res; -} - -/* * Probe a single block device to add to the device cache. */ static void probe_one(blkid_cache cache, const char *ptname, @@ -207,7 +184,7 @@ static void probe_one(blkid_cache cache, const char *ptname, * to standard /dev/mapper/<name>. */ if (!strncmp(ptname, "dm-", 3) && isdigit(ptname[3])) { - devname = get_dm_name(ptname); + devname = canonicalize_dm_name(ptname); if (!devname) blkid__scan_dir("/dev/mapper", devno, 0, &devname); if (devname) |