patch-2.2.0-pre1 linux/fs/file_table.c

• Lines: 52
• Date: Wed Dec 23 11:57:17 1998
• Orig file: v2.1.132/linux/fs/file_table.c
• Orig date: Thu Nov 19 09:56:28 1998

diff -u --recursive --new-file v2.1.132/linux/fs/file_table.c linux/fs/file_table.c
@@ -20,7 +20,7 @@
 /* Free list management, if you are here you must have f_count == 0 */
 static struct file * free_filps = NULL;
 
-void insert_file_free(struct file *file)
+static void insert_file_free(struct file *file)
 {
 	if((file->f_next = free_filps) != NULL)
 		free_filps->f_pprev = &file->f_next;
@@ -40,6 +40,15 @@
 	file->f_pprev = &inuse_filps;
 }
 
+/* It does not matter which list it is on. */
+static inline void remove_filp(struct file *file)
+{
+	if(file->f_next)
+		file->f_next->f_pprev = file->f_pprev;
+	*file->f_pprev = file->f_next;
+}
+
+
 void __init file_table_init(void)
 {
 	filp_cache = kmem_cache_create("filp", sizeof(struct file),
@@ -115,4 +124,26 @@
 		return filp->f_op->open(dentry->d_inode, filp);
 	else
 		return 0;
+}
+
+void fput(struct file *file)
+{
+	int count = file->f_count-1;
+
+	if (!count) {
+		locks_remove_flock(file);
+		__fput(file);
+		file->f_count = 0;
+		remove_filp(file);
+		insert_file_free(file);
+	} else
+		file->f_count = count;
+}
+
+void put_filp(struct file *file)
+{
+	if(--file->f_count == 0) {
+		remove_filp(file);
+		insert_file_free(file);
+	}
 }