diff options
Diffstat (limited to 'fs/notify/fanotify')
| -rw-r--r-- | fs/notify/fanotify/fanotify.c | 14 | ||||
| -rw-r--r-- | fs/notify/fanotify/fanotify_user.c | 5 |
2 files changed, 14 insertions, 5 deletions
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c index f90842efea13..eb4e75175cfb 100644 --- a/fs/notify/fanotify/fanotify.c +++ b/fs/notify/fanotify/fanotify.c @@ -11,6 +11,7 @@ #include <linux/types.h> #include <linux/wait.h> #include <linux/audit.h> +#include <linux/sched/mm.h> #include "fanotify.h" @@ -140,8 +141,8 @@ struct fanotify_event_info *fanotify_alloc_event(struct fsnotify_group *group, struct inode *inode, u32 mask, const struct path *path) { - struct fanotify_event_info *event; - gfp_t gfp = GFP_KERNEL; + struct fanotify_event_info *event = NULL; + gfp_t gfp = GFP_KERNEL_ACCOUNT; /* * For queues with unlimited length lost events are not expected and @@ -151,19 +152,22 @@ struct fanotify_event_info *fanotify_alloc_event(struct fsnotify_group *group, if (group->max_events == UINT_MAX) gfp |= __GFP_NOFAIL; + /* Whoever is interested in the event, pays for the allocation. */ + memalloc_use_memcg(group->memcg); + if (fanotify_is_perm_event(mask)) { struct fanotify_perm_event_info *pevent; pevent = kmem_cache_alloc(fanotify_perm_event_cachep, gfp); if (!pevent) - return NULL; + goto out; event = &pevent->fae; pevent->response = 0; goto init; } event = kmem_cache_alloc(fanotify_event_cachep, gfp); if (!event) - return NULL; + goto out; init: __maybe_unused fsnotify_init_event(&event->fse, inode, mask); event->tgid = get_pid(task_tgid(current)); @@ -174,6 +178,8 @@ init: __maybe_unused event->path.mnt = NULL; event->path.dentry = NULL; } +out: + memalloc_unuse_memcg(); return event; } diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index ec4d8c59d0e3..0cf45041dc32 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -16,6 +16,7 @@ #include <linux/uaccess.h> #include <linux/compat.h> #include <linux/sched/signal.h> +#include <linux/memcontrol.h> #include <asm/ioctls.h> @@ -756,6 +757,7 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags) group->fanotify_data.user = user; atomic_inc(&user->fanotify_listeners); + group->memcg = get_mem_cgroup_from_mm(current->mm); oevent = fanotify_alloc_event(group, NULL, FS_Q_OVERFLOW, NULL); if (unlikely(!oevent)) { @@ -957,7 +959,8 @@ COMPAT_SYSCALL_DEFINE6(fanotify_mark, */ static int __init fanotify_user_setup(void) { - fanotify_mark_cache = KMEM_CACHE(fsnotify_mark, SLAB_PANIC); + fanotify_mark_cache = KMEM_CACHE(fsnotify_mark, + SLAB_PANIC|SLAB_ACCOUNT); fanotify_event_cachep = KMEM_CACHE(fanotify_event_info, SLAB_PANIC); if (IS_ENABLED(CONFIG_FANOTIFY_ACCESS_PERMISSIONS)) { fanotify_perm_event_cachep = |