/* * linux/fs/nfs/callback_proc.c * * Copyright (C) 2004 Trond Myklebust * * NFSv4 callback procedures */ #include <linux/nfs4.h> #include <linux/nfs_fs.h> #include "nfs4_fs.h" #include "callback.h" #include "delegation.h" #include "internal.h" #ifdef NFS_DEBUG #define NFSDBG_FACILITY NFSDBG_CALLBACK #endif __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res) { struct nfs_client *clp; struct nfs_delegation *delegation; struct nfs_inode *nfsi; struct inode *inode; res->bitmap[0] = res->bitmap[1] = 0; res->status = htonl(NFS4ERR_BADHANDLE); clp = nfs_find_client(args->addr, 4); if (clp == NULL) goto out; dprintk("NFS: GETATTR callback request from %s\n", rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); inode = nfs_delegation_find_inode(clp, &args->fh); if (inode == NULL) goto out_putclient; nfsi = NFS_I(inode); down_read(&nfsi->rwsem); delegation = nfsi->delegation; if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0) goto out_iput; res->size = i_size_read(inode); res->change_attr = delegation->change_attr; if (nfsi->npages != 0) res->change_attr++; res->ctime = inode->i_ctime; res->mtime = inode->i_mtime; res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) & args->bitmap[0]; res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) & args->bitmap[1]; res->status = 0; out_iput: up_read(&nfsi->rwsem); iput(inode); out_putclient: nfs_put_client(clp); out: dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status)); return res->status; } __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy) { struct nfs_client *clp; struct inode *inode; __be32 res; res = htonl(NFS4ERR_BADHANDLE); clp = nfs_find_client(args->addr, 4); if (clp == NULL) goto out; dprintk("NFS: RECALL callback request from %s\n", rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); do { struct nfs_client *prev = clp; inode = nfs_delegation_find_inode(clp, &args->fh); if (inode != NULL) { /* Set up a helper thread to actually return the delegation */ switch(nfs_async_inode_return_delegation(inode, &args->stateid)) { case 0: res = 0; break; case -ENOENT: if (res != 0) res = htonl(NFS4ERR_BAD_STATEID); break; default: res = htonl(NFS4ERR_RESOURCE); } iput(inode); } clp = nfs_find_client_next(prev); nfs_put_client(prev); } while (clp != NULL); out: dprintk("%s: exit with status = %d\n", __func__, ntohl(res)); return res; }