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| author | Milan Broz <mbroz@redhat.com> | 2009-01-06 03:05:04 +0000 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-01-06 03:05:04 +0000 |
| commit | 23d39f63aa87e812fd879b8bc32ee6ccfe733de3 (patch) | |
| tree | 3535af0aff56260cdbf573a704e3f0122c6cfc8b | |
| parent | ac1f0ac22c7be908fd33407273b9808bfaedada4 (diff) | |
| download | linux-23d39f63aa87e812fd879b8bc32ee6ccfe733de3.tar.gz linux-23d39f63aa87e812fd879b8bc32ee6ccfe733de3.tar.bz2 linux-23d39f63aa87e812fd879b8bc32ee6ccfe733de3.zip | |
dm ioctl: allow dm_copy_name_and_uuid to return only one field
Allow NULL buffer in dm_copy_name_and_uuid if you only want to return one of
the fields.
(Required by a following patch that adds these fields to sysfs.)
Signed-off-by: Milan Broz <mbroz@redhat.com>
Reviewed-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
| -rw-r--r-- | drivers/md/dm-ioctl.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index 777c948180f9..8da7a017b4ef 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -1550,8 +1550,10 @@ int dm_copy_name_and_uuid(struct mapped_device *md, char *name, char *uuid) goto out; } - strcpy(name, hc->name); - strcpy(uuid, hc->uuid ? : ""); + if (name) + strcpy(name, hc->name); + if (uuid) + strcpy(uuid, hc->uuid ? : ""); out: up_read(&_hash_lock); |