#include <linux/spinlock.h>
#include <linux/slab.h>
-int dir_notify_enable = 1;
+int dir_notify_enable __read_mostly = 1;
-static rwlock_t dn_lock = RW_LOCK_UNLOCKED;
-static kmem_cache_t *dn_cache;
+static kmem_cache_t *dn_cache __read_mostly;
static void redo_inode_mask(struct inode *inode)
{
inode = filp->f_dentry->d_inode;
if (!S_ISDIR(inode->i_mode))
return;
- write_lock(&dn_lock);
+ spin_lock(&inode->i_lock);
prev = &inode->i_dnotify;
while ((dn = *prev) != NULL) {
if ((dn->dn_owner == id) && (dn->dn_filp == filp)) {
}
prev = &dn->dn_next;
}
- write_unlock(&dn_lock);
+ spin_unlock(&inode->i_lock);
}
int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
dn = kmem_cache_alloc(dn_cache, SLAB_KERNEL);
if (dn == NULL)
return -ENOMEM;
- write_lock(&dn_lock);
+ spin_lock(&inode->i_lock);
prev = &inode->i_dnotify;
while ((odn = *prev) != NULL) {
if ((odn->dn_owner == id) && (odn->dn_filp == filp)) {
inode->i_dnotify_mask |= arg & ~DN_MULTISHOT;
dn->dn_next = inode->i_dnotify;
inode->i_dnotify = dn;
-out:
- write_unlock(&dn_lock);
- return error;
+ spin_unlock(&inode->i_lock);
+
+ if (filp->f_op && filp->f_op->dir_notify)
+ return filp->f_op->dir_notify(filp, arg);
+ return 0;
+
out_free:
+ spin_unlock(&inode->i_lock);
kmem_cache_free(dn_cache, dn);
- goto out;
+ return error;
}
void __inode_dir_notify(struct inode *inode, unsigned long event)
struct fown_struct * fown;
int changed = 0;
- write_lock(&dn_lock);
+ spin_lock(&inode->i_lock);
prev = &inode->i_dnotify;
while ((dn = *prev) != NULL) {
if ((dn->dn_mask & event) == 0) {
}
if (changed)
redo_inode_mask(inode);
- write_unlock(&dn_lock);
+ spin_unlock(&inode->i_lock);
}
EXPORT_SYMBOL(__inode_dir_notify);