Modify address_space structures to be able to store vrange trees.
This includes logic to clear all volatile ranges when the last
file handle is closed.
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Android Kernel Team <kernel-team@xxxxxxxxxxx>
Cc: Robert Love <rlove@xxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Dmitry Adamushko <dmitry.adamushko@xxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Neil Brown <neilb@xxxxxxx>
Cc: Andrea Righi <andrea@xxxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Mike Hommey <mh@xxxxxxxxxxxx>
Cc: Taras Glek <tglek@xxxxxxxxxxx>
Cc: Dhaval Giani <dgiani@xxxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxx>
Cc: Michel Lespinasse <walken@xxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx <linux-mm@xxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>
[jstultz: Major refactoring of the code]
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
---
fs/file_table.c | 5 +++++
fs/inode.c | 2 ++
include/linux/fs.h | 2 ++
3 files changed, 9 insertions(+)
diff --git a/fs/file_table.c b/fs/file_table.c
index cd4d87a..94e2cd3 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -26,6 +26,7 @@
#include <linux/hardirq.h>
#include <linux/task_work.h>
#include <linux/ima.h>
+#include <linux/vrange.h>
#include <linux/atomic.h>
@@ -244,6 +245,10 @@ static void __fput(struct file *file)
file->f_op->fasync(-1, file, 0);
}
ima_file_free(file);
+
+ /* drop all vranges on last close */
+ vrange_root_cleanup(&inode->i_mapping->vroot);
+
if (file->f_op && file->f_op->release)
file->f_op->release(inode, file);
security_file_free(file);
diff --git a/fs/inode.c b/fs/inode.c
index 00d5fc3..bf32780 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -17,6 +17,7 @@
#include <linux/prefetch.h>
#include <linux/buffer_head.h> /* for inode_has_buffers */
#include <linux/ratelimit.h>
+#include <linux/vrange.h>
#include "internal.h"
/*
@@ -350,6 +351,7 @@ void address_space_init_once(struct address_space *mapping)
spin_lock_init(&mapping->private_lock);
mapping->i_mmap = RB_ROOT;
INIT_LIST_HEAD(&mapping->i_mmap_nonlinear);
+ vrange_root_init(&mapping->vroot, VRANGE_FILE);
}
EXPORT_SYMBOL(address_space_init_once);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 43db02e..1cbed73 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -27,6 +27,7 @@
#include <linux/lockdep.h>
#include <linux/percpu-rwsem.h>
#include <linux/blk_types.h>
+#include <linux/vrange_types.h>
#include <asm/byteorder.h>
#include <uapi/linux/fs.h>
@@ -411,6 +412,7 @@ struct address_space {
struct rb_root i_mmap; /* tree of private and shared mappings */
struct list_head i_mmap_nonlinear;/*list VM_NONLINEAR mappings */
struct mutex i_mmap_mutex; /* protect tree, count, list */
+ struct vrange_root vroot;
/* Protected by tree_lock together with the radix tree */
unsigned long nrpages; /* number of total pages */
pgoff_t writeback_index;/* writeback starts here */
--
1.8.1.2
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