diff options
Diffstat (limited to 'ipc/namespace.c')
| -rw-r--r-- | ipc/namespace.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/ipc/namespace.c b/ipc/namespace.c index 1fed8922d475..1b967655eb35 100644 --- a/ipc/namespace.c +++ b/ipc/namespace.c @@ -44,6 +44,36 @@ struct ipc_namespace *copy_ipcs(unsigned long flags, struct ipc_namespace *ns) return new_ns; } +/* + * free_ipcs - free all ipcs of one type + * @ns: the namespace to remove the ipcs from + * @ids: the table of ipcs to free + * @free: the function called to free each individual ipc + * + * Called for each kind of ipc when an ipc_namespace exits. + */ +void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids, + void (*free)(struct ipc_namespace *, struct kern_ipc_perm *)) +{ + struct kern_ipc_perm *perm; + int next_id; + int total, in_use; + + down_write(&ids->rw_mutex); + + in_use = ids->in_use; + + for (total = 0, next_id = 0; total < in_use; next_id++) { + perm = idr_find(&ids->ipcs_idr, next_id); + if (perm == NULL) + continue; + ipc_lock_by_ptr(perm); + free(ns, perm); + total++; + } + up_write(&ids->rw_mutex); +} + void free_ipc_ns(struct kref *kref) { struct ipc_namespace *ns; |