On strict cache mode when we close the last file handle of the inode we
should invalidate itt o prevent data coherency problem when we open it
again but it has been modified by other clients.
Signed-off-by: Pavel Shilovsky <piastryyy@xxxxxxxxx>
---
fs/cifs/cifs_fs_sb.h | 1 +
fs/cifs/file.c | 6 ++++++
2 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
index e9a393c..be7b159 100644
--- a/fs/cifs/cifs_fs_sb.h
+++ b/fs/cifs/cifs_fs_sb.h
@@ -40,6 +40,7 @@
#define CIFS_MOUNT_FSCACHE 0x8000 /* local caching enabled */
#define CIFS_MOUNT_MF_SYMLINKS 0x10000 /* Minshall+French Symlinks enabled */
#define CIFS_MOUNT_MULTIUSER 0x20000 /* multiuser mount */
+#define CIFS_MOUNT_STRICT_IO 0x40000 /* strict cache mode */
struct cifs_sb_info {
struct rb_root tlink_tree;
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 71185d1..81ec50e 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -264,7 +264,9 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
struct inode *inode = cifs_file->dentry->d_inode;
struct cifsTconInfo *tcon = tlink_tcon(cifs_file->tlink);
struct cifsInodeInfo *cifsi = CIFS_I(inode);
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct cifsLockInfo *li, *tmp;
+ bool last_open_file = false;
spin_lock(&cifs_file_list_lock);
if (--cifs_file->count > 0) {
@@ -279,10 +281,14 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
if (list_empty(&cifsi->openFileList)) {
cFYI(1, "closing last open instance for inode %p",
cifs_file->dentry->d_inode);
+ last_open_file = true;
cifs_set_oplock_level(inode, 0);
}
spin_unlock(&cifs_file_list_lock);
+ if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) && last_open_file)
+ invalidate_remote_inode(inode);
+
if (!tcon->need_reconnect && !cifs_file->invalidHandle) {
int xid, rc;
--
1.7.2.3
--
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