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Subject[PATCH 3/5] f2fs: allow readdir() to be interrupted
Date
This patch follows ext4 to allow readdir() in large empty directory to
be interrupted. Referenced commit of ext4: 1f60fbe72749 ("ext4: allow
readdir()'s of large empty directories to be interrupted").

Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/dir.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 148927f5bc93..1ebd206a4085 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -10,6 +10,7 @@
*/
#include <linux/fs.h>
#include <linux/f2fs_fs.h>
+#include <linux/sched/signal.h>
#include "f2fs.h"
#include "node.h"
#include "acl.h"
@@ -875,6 +876,14 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx)
min(npages - n, (pgoff_t)MAX_DIR_RA_PAGES));

for (; n < npages; n++) {
+
+ /* allow readdir() to be interrupted */
+ if (fatal_signal_pending(current)) {
+ err = -ERESTARTSYS;
+ goto out_free;
+ }
+ cond_resched();
+
dentry_page = get_lock_data_page(inode, n, false);
if (IS_ERR(dentry_page)) {
err = PTR_ERR(dentry_page);
--
2.13.1.388.g69e6b9b4f4a9
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