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SUNRPC: Clean up the sillyrename code

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Fix a couple of bugs:
 - Don't rely on the parent dentry still being valid when the call completes.
   Fixes a race with shrink_dcache_for_umount_subtree()

 - Don't remove the file if the filehandle has been labelled as stale.

Fix a couple of inefficiencies
 - Remove the global list of sillyrenamed files. Instead we can cache the
   sillyrename information in the dentry->d_fsdata
 - Move common code from unlink_setup/unlink_done into fs/nfs/unlink.c

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust
2007-07-14 15:39:58 -04:00
parent 4fdc17b2a7
commit e4eff1a622
7 changed files with 119 additions and 201 deletions
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50
fs/nfs/nfs4proc.c
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@@ -1962,48 +1962,26 @@ static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
return err;
}
struct unlink_desc {
struct nfs_removeargs args;
struct nfs_removeres res;
};
static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
struct qstr *name)
static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
{
struct nfs_server *server = NFS_SERVER(dir->d_inode);
struct unlink_desc *up;
struct nfs_server *server = NFS_SERVER(dir);
struct nfs_removeargs *args = msg->rpc_argp;
struct nfs_removeres *res = msg->rpc_resp;
up = kmalloc(sizeof(*up), GFP_KERNEL);
if (!up)
return -ENOMEM;
up->args.fh = NFS_FH(dir->d_inode);
up->args.name.len = name->len;
up->args.name.name = name->name;
up->args.bitmask = server->attr_bitmask;
up->res.server = server;
nfs_fattr_init(&up->res.dir_attr);
args->bitmask = server->attr_bitmask;
res->server = server;
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
msg->rpc_argp = &up->args;
msg->rpc_resp = &up->res;
return 0;
}
static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
{
struct rpc_message *msg = &task->tk_msg;
struct unlink_desc *up;
if (msg->rpc_resp != NULL) {
up = container_of(msg->rpc_resp, struct unlink_desc, res);
update_changeattr(dir->d_inode, &up->res.cinfo);
nfs_post_op_update_inode(dir->d_inode, &up->res.dir_attr);
kfree(up);
msg->rpc_resp = NULL;
msg->rpc_argp = NULL;
}
return 0;
struct nfs_removeres *res = task->tk_msg.rpc_resp;
if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
return 0;
update_changeattr(dir, &res->cinfo);
nfs_post_op_update_inode(dir, &res->dir_attr);
return 1;
}
static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,