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Merge tag 'fsnotify_for_v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull fsnotify update from Jan Kara:
 "Make inotify groups be charged against appropriate memcgs"

* tag 'fsnotify_for_v5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  inotify, memcg: account inotify instances to kmemcg
This commit is contained in:
Linus Torvalds 2021-02-22 13:23:29 -08:00
commit db99038542
4 changed files with 24 additions and 8 deletions
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2
fs/notify/fanotify/fanotify_user.c
View File

@ -976,7 +976,7 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
f_flags |= O_NONBLOCK;
/* fsnotify_alloc_group takes a ref. Dropped in fanotify_release */
group = fsnotify_alloc_group(&fanotify_fsnotify_ops);
group = fsnotify_alloc_user_group(&fanotify_fsnotify_ops);
if (IS_ERR(group)) {
free_uid(user);
return PTR_ERR(group);

25
fs/notify/group.c
View File

@ -111,14 +111,12 @@ void fsnotify_put_group(struct fsnotify_group *group)
}
EXPORT_SYMBOL_GPL(fsnotify_put_group);
/*
* Create a new fsnotify_group and hold a reference for the group returned.
*/
struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
static struct fsnotify_group *__fsnotify_alloc_group(
const struct fsnotify_ops *ops, gfp_t gfp)
{
struct fsnotify_group *group;
group = kzalloc(sizeof(struct fsnotify_group), GFP_KERNEL);
group = kzalloc(sizeof(struct fsnotify_group), gfp);
if (!group)
return ERR_PTR(-ENOMEM);
@ -139,8 +137,25 @@ struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
return group;
}
/*
* Create a new fsnotify_group and hold a reference for the group returned.
*/
struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
{
return __fsnotify_alloc_group(ops, GFP_KERNEL);
}
EXPORT_SYMBOL_GPL(fsnotify_alloc_group);
/*
* Create a new fsnotify_group and hold a reference for the group returned.
*/
struct fsnotify_group *fsnotify_alloc_user_group(const struct fsnotify_ops *ops)
{
return __fsnotify_alloc_group(ops, GFP_KERNEL_ACCOUNT);
}
EXPORT_SYMBOL_GPL(fsnotify_alloc_user_group);
int fsnotify_fasync(int fd, struct file *file, int on)
{
struct fsnotify_group *group = file->private_data;

4
fs/notify/inotify/inotify_user.c
View File

@ -632,11 +632,11 @@ static struct fsnotify_group *inotify_new_group(unsigned int max_events)
struct fsnotify_group *group;
struct inotify_event_info *oevent;
group = fsnotify_alloc_group(&inotify_fsnotify_ops);
group = fsnotify_alloc_user_group(&inotify_fsnotify_ops);
if (IS_ERR(group))
return group;
oevent = kmalloc(sizeof(struct inotify_event_info), GFP_KERNEL);
oevent = kmalloc(sizeof(struct inotify_event_info), GFP_KERNEL_ACCOUNT);
if (unlikely(!oevent)) {
fsnotify_destroy_group(group);
return ERR_PTR(-ENOMEM);

1
include/linux/fsnotify_backend.h
View File

@ -470,6 +470,7 @@ static inline void fsnotify_update_flags(struct dentry *dentry)
/* create a new group */
extern struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops);
extern struct fsnotify_group *fsnotify_alloc_user_group(const struct fsnotify_ops *ops);
/* get reference to a group */
extern void fsnotify_get_group(struct fsnotify_group *group);
/* drop reference on a group from fsnotify_alloc_group */