From: Bharath SM bharathsm@microsoft.com
[ Upstream commit d906be3fa571f6fc9381911304a0eca99f1b6951 ]
We should not cache deferred file handles if we dont have handle lease on a file. And we should immediately close all deferred handles in case of handle lease break.
Fixes: 9e31678fb403 ("SMB3: fix lease break timeout when multiple deferred close handles for the same file.") 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/cifs/file.c | 16 ++++++++++++++++ fs/cifs/misc.c | 2 +- 2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 6f5fbbbebec33..158a0a5f40071 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -5087,6 +5087,8 @@ void cifs_oplock_break(struct work_struct *work) struct TCP_Server_Info *server = tcon->ses->server; int rc = 0; bool purge_cache = false; + struct cifs_deferred_close *dclose; + bool is_deferred = false;
wait_on_bit(&cinode->flags, CIFS_INODE_PENDING_WRITERS, TASK_UNINTERRUPTIBLE); @@ -5122,6 +5124,20 @@ void cifs_oplock_break(struct work_struct *work) cifs_dbg(VFS, "Push locks rc = %d\n", rc);
oplock_break_ack: + /* + * When oplock break is received and there are no active + * file handles but cached, then schedule deferred close immediately. + * So, new open will not use cached handle. + */ + spin_lock(&CIFS_I(inode)->deferred_lock); + is_deferred = cifs_is_deferred_close(cfile, &dclose); + spin_unlock(&CIFS_I(inode)->deferred_lock); + + if (!CIFS_CACHE_HANDLE(cinode) && is_deferred && + cfile->deferred_close_scheduled && delayed_work_pending(&cfile->deferred)) { + cifs_close_deferred_file(cinode); + } + /* * releasing stale oplock after recent reconnect of smb session using * a now incorrect file handle is not a data integrity issue but do diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index f3903ae0cc6b8..31e06133acc3d 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -757,7 +757,7 @@ cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode) spin_unlock(&cifs_inode->open_file_lock);
list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) { - _cifsFileInfo_put(tmp_list->cfile, true, false); + _cifsFileInfo_put(tmp_list->cfile, false, false); list_del(&tmp_list->list); kfree(tmp_list); }