[PATCH 6.6 061/102] cifs: defer close file handles having RH lease

Greg Kroah-Hartman
2024-05-23T13:25:09Z

From: Bharath SM <bharathsm@microsoft.com>

[ Upstream commit dc528770edb138e26a533f8a77de5c4db18ea7f3 ]

Previously we only deferred closing file handles with RHW
lease. To enhance performance benefits from deferred closes,
we now include handles with RH leases as well.

Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/smb/client/file.c | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c
index 8eaf195ef5604..6dc2e8db9c8ed 100644
--- a/fs/smb/client/file.c
+++ b/fs/smb/client/file.c
@@ -1152,6 +1152,19 @@ void smb2_deferred_work_close(struct work_struct *work)
_cifsFileInfo_put(cfile, true, false);
}

+static bool
+smb2_can_defer_close(struct inode *inode, struct cifs_deferred_close *dclose)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ struct cifsInodeInfo *cinode = CIFS_I(inode);
+
+ return (cifs_sb->ctx->closetimeo && cinode->lease_granted && dclose &&
+ (cinode->oplock == CIFS_CACHE_RHW_FLG ||
+ cinode->oplock == CIFS_CACHE_RH_FLG) &&
+ !test_bit(CIFS_INO_CLOSE_ON_LOCK, &cinode->flags));
+
+}
+
int cifs_close(struct inode *inode, struct file *file)
{
struct cifsFileInfo *cfile;
@@ -1165,10 +1178,8 @@ int cifs_close(struct inode *inode, struct file *file)
cfile = file->private_data;
file->private_data = NULL;
dclose = kmalloc(sizeof(struct cifs_deferred_close), GFP_KERNEL);
- if ((cifs_sb->ctx->closetimeo && cinode->oplock == CIFS_CACHE_RHW_FLG)
- && cinode->lease_granted &&
- !test_bit(CIFS_INO_CLOSE_ON_LOCK, &cinode->flags) &&
- dclose && !(cfile->status_file_deleted)) {
+ if ((cfile->status_file_deleted == false) &&
+ (smb2_can_defer_close(inode, dclose))) {
if (test_and_clear_bit(CIFS_INO_MODIFIED_ATTR, &cinode->flags)) {
inode_set_mtime_to_ts(inode,
inode_set_ctime_current(inode));
--
2.43.0