94845fc422
[ Upstream commit a32e697cda27679a0327ae2cafdad8c7170f548f ]
The inotify mask flags IN_ONESHOT and IN_EXCL_UNLINK are not "internal
to kernel" and should be exposed in procfs fdinfo so CRIU can restore
them.
Fixes: 6933599697 ("inotify: hide internal kernel bits from fdinfo")
Link: https://lore.kernel.org/r/20220422120327.3459282-2-amir73il@gmail.com
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/fsnotify_backend.h>
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#include <linux/inotify.h>
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#include <linux/slab.h> /* struct kmem_cache */
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struct inotify_event_info {
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struct fsnotify_event fse;
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u32 mask;
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int wd;
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u32 sync_cookie;
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int name_len;
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char name[];
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};
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struct inotify_inode_mark {
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struct fsnotify_mark fsn_mark;
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int wd;
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};
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static inline struct inotify_event_info *INOTIFY_E(struct fsnotify_event *fse)
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{
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return container_of(fse, struct inotify_event_info, fse);
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}
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/*
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* INOTIFY_USER_FLAGS represents all of the mask bits that we expose to
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* userspace. There is at least one bit (FS_EVENT_ON_CHILD) which is
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* used only internally to the kernel.
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*/
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#define INOTIFY_USER_MASK (IN_ALL_EVENTS | IN_ONESHOT | IN_EXCL_UNLINK)
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static inline __u32 inotify_mark_user_mask(struct fsnotify_mark *fsn_mark)
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{
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return fsn_mark->mask & INOTIFY_USER_MASK;
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}
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extern void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
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struct fsnotify_group *group);
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extern int inotify_handle_inode_event(struct fsnotify_mark *inode_mark,
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u32 mask, struct inode *inode,
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struct inode *dir,
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const struct qstr *name, u32 cookie);
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extern const struct fsnotify_ops inotify_fsnotify_ops;
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extern struct kmem_cache *inotify_inode_mark_cachep;
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#ifdef CONFIG_INOTIFY_USER
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static inline void dec_inotify_instances(struct ucounts *ucounts)
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{
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dec_ucount(ucounts, UCOUNT_INOTIFY_INSTANCES);
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}
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static inline struct ucounts *inc_inotify_watches(struct ucounts *ucounts)
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{
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return inc_ucount(ucounts->ns, ucounts->uid, UCOUNT_INOTIFY_WATCHES);
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}
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static inline void dec_inotify_watches(struct ucounts *ucounts)
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{
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dec_ucount(ucounts, UCOUNT_INOTIFY_WATCHES);
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}
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#endif
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