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cifs: Deferred close performance improvements

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During unlink/rename instead of closing all the deferred handles
under tcon, close only handles under the requested dentry.

Signed-off-by: Rohith Surabattula <rohiths@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Rohith Surabattula 2021-09-17 18:14:26 +00:00 committed by Steve French
parent 4c51de1e8f
commit e3fc065682
3 changed files with 43 additions and 3 deletions
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3
fs/cifs/cifsproto.h
View File

@ -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);

6
fs/cifs/inode.c
View File

@ -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);

37
fs/cifs/misc.c
View File

@ -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