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mount: Helper for auto-ext entry creation

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Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
This commit is contained in:
Pavel Emelyanov
2016-09-21 12:59:20 +03:00
parent 8ccdb649bb
commit 5af9e2b189
1 changed files with 29 additions and 17 deletions
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46
criu/mount.c
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@@ -35,6 +35,11 @@
#include "images/mnt.pb-c.h"
#include "images/binfmt-misc.pb-c.h"
/*
* Put a : in here since those are invalid on
* the cli, so we know it's autogenerated in
* debugging.
*/
#define AUTODETECTED_MOUNT "CRIU:AUTOGENERATED"
#define MS_PROPAGATE (MS_SHARED | MS_PRIVATE | MS_UNBINDABLE | MS_SLAVE)
@@ -79,6 +84,19 @@ static struct ext_mount *ext_mount_lookup(char *key)
return NULL;
}
static struct ext_mount *ext_mount_make_auto(char *key, char *val)
{
struct ext_mount *em;
em = xmalloc(sizeof(*em));
if (em) {
em->key = key;
em->val = val;
}
return em;
}
/*
* Single linked list of mount points get from proc/images
*/
@@ -817,7 +835,6 @@ static int resolve_external_mounts(struct mount_info *info)
for (m = info; m; m = m->next) {
int ret;
char *p, *cut_root;
struct ext_mount *em;
struct mount_info *match;
if (m->parent == NULL || m->is_ns_root)
@@ -861,17 +878,16 @@ static int resolve_external_mounts(struct mount_info *info)
if (!p)
return -1;
em = xmalloc(sizeof(struct ext_mount));
if (!em) {
m->external = ext_mount_make_auto(p, AUTODETECTED_MOUNT);
if (!m->external) {
free(p);
return -1;
}
em->val = AUTODETECTED_MOUNT;
em->key = p;
m->external = em;
/*
* Put the guessed name in source. It will be picked up
* as auto-root in get_mp_root() on restore.
*/
xfree(m->source);
m->source = p;
@@ -3086,18 +3102,14 @@ static int get_mp_root(MntEntry *me, struct mount_info *mi)
* Make up an external mount entry for this
* mount point, since we couldn't find a user
* supplied one.
*
* The 'val' was put into mi->source during
* dump by resolve_external_mounts().
*/
em = xmalloc(sizeof(struct ext_mount));
em = ext_mount_make_auto(AUTODETECTED_MOUNT, mi->source);
if (!em)
return -1;
/*
* Put a : in here since those are invalid on
* the cli, so we know it's autogenerated in
* debugging.
*/
em->key = AUTODETECTED_MOUNT;
em->val = mi->source;
}
mi->external = em;