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f083441ba8
Currently, fanotify creates new structure to track the fact that permission event has been reported to userspace and someone is waiting for a response to it. As event structures are now completely in the hands of each notification framework, we can use the event structure for this tracking instead of allocating a new structure. Since this makes the event structures for normal events and permission events even more different and the structures have different lifetime rules, we split them into two separate structures (where permission event structure contains the structure for a normal event). This makes normal events 8 bytes smaller and the code a tad bit cleaner. [akpm@linux-foundation.org: fix build] Signed-off-by: Jan Kara <jack@suse.cz> Cc: Eric Paris <eparis@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
#include <linux/fsnotify_backend.h>
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#include <linux/path.h>
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#include <linux/slab.h>
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extern struct kmem_cache *fanotify_event_cachep;
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extern struct kmem_cache *fanotify_perm_event_cachep;
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/*
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* Structure for normal fanotify events. It gets allocated in
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* fanotify_handle_event() and freed when the information is retrieved by
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* userspace
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*/
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struct fanotify_event_info {
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struct fsnotify_event fse;
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/*
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* We hold ref to this path so it may be dereferenced at any point
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* during this object's lifetime
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*/
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struct path path;
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struct pid *tgid;
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};
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#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
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/*
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* Structure for permission fanotify events. It gets allocated and freed in
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* fanotify_handle_event() since we wait there for user response. When the
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* information is retrieved by userspace the structure is moved from
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* group->notification_list to group->fanotify_data.access_list to wait for
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* user response.
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*/
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struct fanotify_perm_event_info {
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struct fanotify_event_info fae;
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int response; /* userspace answer to question */
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int fd; /* fd we passed to userspace for this event */
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};
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static inline struct fanotify_perm_event_info *
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FANOTIFY_PE(struct fsnotify_event *fse)
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{
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return container_of(fse, struct fanotify_perm_event_info, fae.fse);
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}
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#endif
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static inline struct fanotify_event_info *FANOTIFY_E(struct fsnotify_event *fse)
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{
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return container_of(fse, struct fanotify_event_info, fse);
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}
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struct fanotify_event_info *fanotify_alloc_event(struct inode *inode, u32 mask,
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struct path *path);
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