From 52aeb442bc4c3cc6e174222e436378d0ab8fe312 Mon Sep 17 00:00:00 2001
From: zhangkaixiang <zhangkaixiang5@huawei.com>
Date: Sun, 9 Oct 2022 03:52:56 +0000
Subject: [PATCH] add the num of share file

Signed-off-by: zhangkaixiang <zhangkaixiang5@huawei.com>
---
 fs/hmdfs/hmdfs_share.c | 32 +++++++++++++++++++++++++++++---
 fs/hmdfs/hmdfs_share.h |  3 ++-
 2 files changed, 31 insertions(+), 4 deletions(-)

diff --git a/fs/hmdfs/hmdfs_share.c b/fs/hmdfs/hmdfs_share.c
index 760afcbcec11..c8314a5d7fca 100644
--- a/fs/hmdfs/hmdfs_share.c
+++ b/fs/hmdfs/hmdfs_share.c
@@ -83,8 +83,11 @@ int insert_share_item(struct hmdfs_share_table *st, struct qstr *relative_path,
 	int err = 0;
 
 	if (st->item_cnt >= st->max_cnt) {
-		err = -EMFILE;
-		goto err_out;
+		int ret = hmdfs_clear_first_item(st);
+		if (unlikely(ret)) {
+			err = -EMFILE;
+			goto err_out;
+		}
 	}
 
 	path_name = kzalloc(PATH_MAX, GFP_KERNEL);
@@ -245,15 +248,23 @@ void hmdfs_close_share_item(struct hmdfs_sb_info *sbi, struct file *file,
 		goto unlock;
 	}
 
+	/*
+	 * If the item is shared to all device, we should close the item directly.
+	 */
+	if (!strcmp(item->cid, SHARE_ALL_DEVICE)) {
+		goto close;
+	}
+
 	if (unlikely(!is_dst_device(item->cid, cid))) {
 		hmdfs_err("item not right, dst cid is: %s", item->cid);
 		goto unlock;
 	}
 
 	/*
-	 * After remote close, we shoule reset the opened status and restart
+	 * After remote close, we should reset the opened status and restart
 	 * delayed timeout work.
 	 */
+close:
 	item->opened = false;
 	queue_delayed_work(item->hst->share_item_timeout_wq, &item->d_work,
 				HZ * HMDFS_SHARE_ITEM_TIMEOUT_S);
@@ -316,3 +327,18 @@ void hmdfs_clear_share_table(struct hmdfs_sb_info *sbi)
 
 	destroy_workqueue(st->share_item_timeout_wq);
 }
+
+int hmdfs_clear_first_item(struct hmdfs_share_table *st)
+{
+	int ret = -EMFILE;
+	struct hmdfs_share_item *item, *tmp;
+	list_for_each_entry_safe(item, tmp, &st->item_list_head, list) {
+		if (!item->timeout) {
+			cancel_delayed_work_sync(&item->d_work);
+		}
+		remove_and_release_share_item(item);
+		ret = 0;
+		break;
+	}
+	return ret;
+}
diff --git a/fs/hmdfs/hmdfs_share.h b/fs/hmdfs/hmdfs_share.h
index 8b1ecb29c6b8..eef53bf19bab 100644
--- a/fs/hmdfs/hmdfs_share.h
+++ b/fs/hmdfs/hmdfs_share.h
@@ -16,7 +16,7 @@
 #include "comm/connection.h"
 
 #define HMDFS_SHARE_ITEM_TIMEOUT_S 120
-#define HMDFS_SHARE_ITEMS_MAX 4
+#define HMDFS_SHARE_ITEMS_MAX 128
 
 #define HMDFS_IOC 0xf2
 #define HMDFS_IOC_SET_SHARE_PATH	_IOW(HMDFS_IOC, 1, \
@@ -62,5 +62,6 @@ int hmdfs_check_share_access_permission(struct hmdfs_sb_info *sbi,
 
 void hmdfs_init_share_table(struct hmdfs_sb_info *sbi);
 void hmdfs_clear_share_table(struct hmdfs_sb_info *sbi);
+int hmdfs_clear_first_item(struct hmdfs_share_table *st);
 
 #endif // HMDFS_SHARE_H
-- 
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