From e3fc065682ebbbd15b0ce0036800f4acbf765d46 Mon Sep 17 00:00:00 2001 From: Rohith Surabattula Date: Fri, 17 Sep 2021 18:14:26 +0000 Subject: [PATCH] cifs: Deferred close performance improvements During unlink/rename instead of closing all the deferred handles under tcon, close only handles under the requested dentry. Signed-off-by: Rohith Surabattula Signed-off-by: Steve French --- fs/cifs/cifsproto.h | 3 +++ fs/cifs/inode.c | 6 +++--- fs/cifs/misc.c | 37 +++++++++++++++++++++++++++++++++++++ 3 files changed, 43 insertions(+), 3 deletions(-) diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 54966c1..d0f85b66 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -267,6 +267,9 @@ extern void cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode); extern void cifs_close_all_deferred_files(struct cifs_tcon *cifs_tcon); +extern void cifs_close_deferred_file_under_dentry(struct cifs_tcon *cifs_tcon, + const char *path); + extern struct TCP_Server_Info *cifs_get_tcp_session(struct smb3_fs_context *ctx); extern void cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect); diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 19af2d0..8284841 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -1624,7 +1624,7 @@ int cifs_unlink(struct inode *dir, struct dentry *dentry) goto unlink_out; } - cifs_close_deferred_file(CIFS_I(inode)); + cifs_close_deferred_file_under_dentry(tcon, full_path); if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability))) { rc = CIFSPOSIXDelFile(xid, tcon, full_path, @@ -2113,9 +2113,9 @@ cifs_rename2(struct user_namespace *mnt_userns, struct inode *source_dir, goto cifs_rename_exit; } - cifs_close_deferred_file(CIFS_I(d_inode(source_dentry))); + cifs_close_deferred_file_under_dentry(tcon, from_name); if (d_inode(target_dentry) != NULL) - cifs_close_deferred_file(CIFS_I(d_inode(target_dentry))); + cifs_close_deferred_file_under_dentry(tcon, to_name); rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, to_name); diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index f4313935..05138f9 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -780,6 +780,43 @@ cifs_close_all_deferred_files(struct cifs_tcon *tcon) kfree(tmp_list); } } +void +cifs_close_deferred_file_under_dentry(struct cifs_tcon *tcon, const char *path) +{ + struct cifsFileInfo *cfile; + struct list_head *tmp; + struct file_list *tmp_list, *tmp_next_list; + struct list_head file_head; + void *page; + const char *full_path; + + INIT_LIST_HEAD(&file_head); + page = alloc_dentry_path(); + spin_lock(&tcon->open_file_lock); + list_for_each(tmp, &tcon->openFileList) { + cfile = list_entry(tmp, struct cifsFileInfo, tlist); + full_path = build_path_from_dentry(cfile->dentry, page); + if (strstr(full_path, path)) { + if (delayed_work_pending(&cfile->deferred)) { + if (cancel_delayed_work(&cfile->deferred)) { + tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC); + if (tmp_list == NULL) + break; + tmp_list->cfile = cfile; + list_add_tail(&tmp_list->list, &file_head); + } + } + } + } + spin_unlock(&tcon->open_file_lock); + + list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) { + _cifsFileInfo_put(tmp_list->cfile, true, false); + list_del(&tmp_list->list); + kfree(tmp_list); + } + free_dentry_path(page); +} /* parses DFS refferal V3 structure * caller is responsible for freeing target_nodes -- 2.7.4