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no rootfs => mounts are always relative to hosts /

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All lxc.mount.entry entries will be relative to the hosts / when a container
does not specify a lxc.rootfs.

Signed-off-by: Christian Brauner <christian.brauner@mailbox.org>
This commit is contained in:
Christian Brauner 2016-02-03 13:17:51 +01:00
parent e855f21476
commit 1433c9f9b6
1 changed files with 17 additions and 2 deletions
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19
src/lxc/conf.c
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@ -1807,7 +1807,22 @@ static inline int mount_entry_on_generic(struct mntent *mntent,
static inline int mount_entry_on_systemfs(struct mntent *mntent)
{
return mount_entry_on_generic(mntent, mntent->mnt_dir, NULL, NULL, NULL);
char path[MAXPATHLEN];
int ret;
/* For containers created without a rootfs all mounts are treated as
* absolute paths starting at / on the host. */
if (mntent->mnt_dir[0] != '/')
ret = snprintf(path, sizeof(path), "/%s", mntent->mnt_dir);
else
ret = snprintf(path, sizeof(path), "%s", mntent->mnt_dir);
if (ret < 0 || ret >= sizeof(path)) {
ERROR("path name too long");
return -1;
}
return mount_entry_on_generic(mntent, path, NULL, NULL, NULL);
}
static int mount_entry_on_absolute_rootfs(struct mntent *mntent,
@ -1868,7 +1883,7 @@ static int mount_entry_on_relative_rootfs(struct mntent *mntent,
/* relative to root mount point */
ret = snprintf(path, sizeof(path), "%s/%s", rootfs->mount, mntent->mnt_dir);
if (ret >= sizeof(path)) {
if (ret < 0 || ret >= sizeof(path)) {
ERROR("path name too long");
return -1;
}