NTFS: Allow highmem kmalloc() in ntfs_malloc_nofs() and add _nofail() version.

[pandora-kernel.git] / fs / inotify.c

diff --git a/fs/inotify.c b/fs/inotify.c
index a8a714e..a37e9fb 100644 (file)
--- a/fs/inotify.c
+++ b/fs/inotify.c
@@ -37,6 +37,7 @@
 #include <asm/ioctls.h>
 
 static atomic_t inotify_cookie;
+static atomic_t inotify_watches;
 
 static kmem_cache_t *watch_cachep;
 static kmem_cache_t *event_cachep;
@@ -90,6 +91,7 @@ struct inotify_device {
        unsigned int            queue_size;     /* size of the queue (bytes) */
        unsigned int            event_count;    /* number of pending events */
        unsigned int            max_events;     /* maximum number of events */
+       u32                     last_wd;        /* the last wd allocated */
 };
 
 /*
@@ -352,7 +354,7 @@ static int inotify_dev_get_wd(struct inotify_device *dev,
        do {
                if (unlikely(!idr_pre_get(&dev->idr, GFP_KERNEL)))
                        return -ENOSPC;
-               ret = idr_get_new(&dev->idr, watch, &watch->wd);
+               ret = idr_get_new_above(&dev->idr, watch, dev->last_wd+1, &watch->wd);
        } while (ret == -EAGAIN);
 
        return ret;
@@ -401,6 +403,7 @@ static struct inotify_watch *create_watch(struct inotify_device *dev,
                return ERR_PTR(ret);
        }
 
+       dev->last_wd = watch->wd;
        watch->mask = mask;
        atomic_set(&watch->count, 0);
        INIT_LIST_HEAD(&watch->d_list);
@@ -420,6 +423,7 @@ static struct inotify_watch *create_watch(struct inotify_device *dev,
        get_inotify_watch(watch);
 
        atomic_inc(&dev->user->inotify_watches);
+       atomic_inc(&inotify_watches);
 
        return watch;
 }
@@ -452,6 +456,7 @@ static void remove_watch_no_event(struct inotify_watch *watch,
        list_del(&watch->d_list);
 
        atomic_dec(&dev->user->inotify_watches);
+       atomic_dec(&inotify_watches);
        idr_remove(&dev->idr, watch->wd);
        put_inotify_watch(watch);
 }
@@ -530,6 +535,9 @@ void inotify_dentry_parent_queue_event(struct dentry *dentry, u32 mask,
        struct dentry *parent;
        struct inode *inode;
 
+       if (!atomic_read (&inotify_watches))
+               return;
+
        spin_lock(&dentry->d_lock);
        parent = dentry->d_parent;
        inode = parent->d_inode;
@@ -899,6 +907,7 @@ asmlinkage long sys_inotify_init(void)
        dev->queue_size = 0;
        dev->max_events = inotify_max_queued_events;
        dev->user = user;
+       dev->last_wd = 0;
        atomic_set(&dev->count, 0);
 
        get_inotify_dev(dev);
@@ -922,6 +931,7 @@ asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
        struct nameidata nd;
        struct file *filp;
        int ret, fput_needed;
+       int mask_add = 0;
 
        filp = fget_light(fd, &fput_needed);
        if (unlikely(!filp))
@@ -944,6 +954,9 @@ asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
        down(&inode->inotify_sem);
        down(&dev->sem);
 
+       if (mask & IN_MASK_ADD)
+               mask_add = 1;
+
        /* don't let user-space set invalid bits: we don't want flags set */
        mask &= IN_ALL_EVENTS;
        if (unlikely(!mask)) {
@@ -957,7 +970,10 @@ asmlinkage long sys_inotify_add_watch(int fd, const char __user *path, u32 mask)
         */
        old = inode_find_dev(inode, dev);
        if (unlikely(old)) {
-               old->mask = mask;
+               if (mask_add)
+                       old->mask |= mask;
+               else
+                       old->mask = mask;
                ret = old->wd;
                goto out;
        }
@@ -1040,6 +1056,7 @@ static int __init inotify_setup(void)
        inotify_max_user_watches = 8192;
 
        atomic_set(&inotify_cookie, 0);
+       atomic_set(&inotify_watches, 0);
 
        watch_cachep = kmem_cache_create("inotify_watch_cache",
                                         sizeof(struct inotify_watch),