#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
+#include <linux/fdtable.h>
int dir_notify_enable __read_mostly = 1;
-static kmem_cache_t *dn_cache __read_mostly;
+static struct kmem_cache *dn_cache __read_mostly;
static void redo_inode_mask(struct inode *inode)
{
struct dnotify_struct **prev;
struct inode *inode;
- inode = filp->f_dentry->d_inode;
+ inode = filp->f_path.dentry->d_inode;
if (!S_ISDIR(inode->i_mode))
return;
spin_lock(&inode->i_lock);
struct dnotify_struct **prev;
struct inode *inode;
fl_owner_t id = current->files;
+ struct file *f;
int error = 0;
if ((arg & ~DN_MULTISHOT) == 0) {
}
if (!dir_notify_enable)
return -EINVAL;
- inode = filp->f_dentry->d_inode;
+ inode = filp->f_path.dentry->d_inode;
if (!S_ISDIR(inode->i_mode))
return -ENOTDIR;
- dn = kmem_cache_alloc(dn_cache, SLAB_KERNEL);
+ dn = kmem_cache_alloc(dn_cache, GFP_KERNEL);
if (dn == NULL)
return -ENOMEM;
spin_lock(&inode->i_lock);
prev = &odn->dn_next;
}
- error = f_setown(filp, current->pid, 0);
+ rcu_read_lock();
+ f = fcheck(fd);
+ rcu_read_unlock();
+ /* we'd lost the race with close(), sod off silently */
+ /* note that inode->i_lock prevents reordering problems
+ * between accesses to descriptor table and ->i_dnotify */
+ if (f != filp)
+ goto out_free;
+
+ error = __f_setown(filp, task_pid(current), PIDTYPE_PID, 0);
if (error)
goto out_free;
static int __init dnotify_init(void)
{
dn_cache = kmem_cache_create("dnotify_cache",
- sizeof(struct dnotify_struct), 0, SLAB_PANIC, NULL, NULL);
+ sizeof(struct dnotify_struct), 0, SLAB_PANIC, NULL);
return 0;
}