Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 28 insertions, 11 deletions

diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index e40190d16878..69ad89b50489 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -45,7 +45,7 @@
 #define FS_ACCESS_PERM          0x00020000      /* access event in a permissions hook */
 
 #define FS_EXCL_UNLINK          0x04000000      /* do not send events if object is unlinked */
-#define FS_IN_ISDIR             0x40000000      /* event occurred against dir */
+#define FS_ISDIR                0x40000000      /* event occurred against dir */
 #define FS_IN_ONESHOT           0x80000000      /* only send event once */
 
 #define FS_DN_RENAME            0x10000000      /* file renamed */
@@ -64,13 +64,15 @@
 
 #define FS_MOVE                 (FS_MOVED_FROM | FS_MOVED_TO)
 
+#define ALL_FSNOTIFY_PERM_EVENTS (FS_OPEN_PERM | FS_ACCESS_PERM)
+
 #define ALL_FSNOTIFY_EVENTS (FS_ACCESS | FS_MODIFY | FS_ATTRIB | \
                              FS_CLOSE_WRITE | FS_CLOSE_NOWRITE | FS_OPEN | \
                              FS_MOVED_FROM | FS_MOVED_TO | FS_CREATE | \
                              FS_DELETE | FS_DELETE_SELF | FS_MOVE_SELF | \
                              FS_UNMOUNT | FS_Q_OVERFLOW | FS_IN_IGNORED | \
                              FS_OPEN_PERM | FS_ACCESS_PERM | FS_EXCL_UNLINK | \
-                             FS_IN_ISDIR | FS_IN_ONESHOT | FS_DN_RENAME | \
+                             FS_ISDIR | FS_IN_ONESHOT | FS_DN_RENAME | \
                              FS_DN_MULTISHOT | FS_EVENT_ON_CHILD)
 
 struct fsnotify_group;
@@ -129,6 +131,14 @@ struct fsnotify_group {
         wait_queue_head_t notification_waitq;   /* read() on the notification file blocks on this waitq */
         unsigned int q_len;                     /* events on the queue */
         unsigned int max_events;                /* maximum events allowed on the list */
+        /*
+         * Valid fsnotify group priorities.  Events are send in order from highest
+         * priority to lowest priority.  We default to the lowest priority.
+         */
+        #define FS_PRIO_0       0 /* normal notifiers, no permissions */
+        #define FS_PRIO_1       1 /* fanotify content based access control */
+        #define FS_PRIO_2       2 /* fanotify pre-content access */
+        unsigned int priority;
 
         /* stores all fastpath marks assoc with this group so they can be cleaned on unregister */
         spinlock_t mark_lock;           /* protect marks_list */
@@ -156,9 +166,11 @@ struct fsnotify_group {
                         struct mutex access_mutex;
                         struct list_head access_list;
                         wait_queue_head_t access_waitq;
-                        bool bypass_perm; /* protected by access_mutex */
+                        atomic_t bypass_perm;
 #endif /* CONFIG_FANOTIFY_ACCESS_PERMISSIONS */
                         int f_flags;
+                        unsigned int max_marks;
+                        struct user_struct *user;
                 } fanotify_data;
 #endif /* CONFIG_FANOTIFY */
         };
@@ -275,8 +287,8 @@ struct fsnotify_mark {
                 struct fsnotify_inode_mark i;
                 struct fsnotify_vfsmount_mark m;
         };
-        __u32 ignored_mask;             /* events types to ignore */
         struct list_head free_g_list;   /* tmp list used when freeing this mark */
+        __u32 ignored_mask;             /* events types to ignore */
 #define FSNOTIFY_MARK_FLAG_INODE                0x01
 #define FSNOTIFY_MARK_FLAG_VFSMOUNT             0x02
 #define FSNOTIFY_MARK_FLAG_OBJECT_PINNED        0x04
@@ -294,7 +306,7 @@ struct fsnotify_mark {
 /* main fsnotify call to send events */
 extern int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is,
                     const unsigned char *name, u32 cookie);
-extern void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask);
+extern int __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask);
 extern void __fsnotify_inode_delete(struct inode *inode);
 extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt);
 extern u32 fsnotify_get_cookie(void);
@@ -317,9 +329,15 @@ static inline void __fsnotify_update_dcache_flags(struct dentry *dentry)
 {
         struct dentry *parent;
 
-        assert_spin_locked(&dcache_lock);
         assert_spin_locked(&dentry->d_lock);
 
+        /*
+         * Serialisation of setting PARENT_WATCHED on the dentries is provided
+         * by d_lock. If inotify_inode_watched changes after we have taken
+         * d_lock, the following __fsnotify_update_child_dentry_flags call will
+         * find our entry, so it will spin until we complete here, and update
+         * us with the new state.
+         */
         parent = dentry->d_parent;
         if (parent->d_inode && fsnotify_inode_watches_children(parent->d_inode))
                 dentry->d_flags |= DCACHE_FSNOTIFY_PARENT_WATCHED;
@@ -329,15 +347,12 @@ static inline void __fsnotify_update_dcache_flags(struct dentry *dentry)
 
 /*
  * fsnotify_d_instantiate - instantiate a dentry for inode
- * Called with dcache_lock held.
  */
 static inline void __fsnotify_d_instantiate(struct dentry *dentry, struct inode *inode)
 {
         if (!inode)
                 return;
 
-        assert_spin_locked(&dcache_lock);
-
         spin_lock(&dentry->d_lock);
         __fsnotify_update_dcache_flags(dentry);
         spin_unlock(&dentry->d_lock);
@@ -423,8 +438,10 @@ static inline int fsnotify(struct inode *to_tell, __u32 mask, void *data, int da
         return 0;
 }
 
-static inline void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
-{}
+static inline int __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
+{
+        return 0;
+}
 
 static inline void __fsnotify_inode_delete(struct inode *inode)
 {}