2 * linux/fs/nfs/callback_proc.c
4 * Copyright (C) 2004 Trond Myklebust
6 * NFSv4 callback procedures
8 #include <linux/nfs4.h>
9 #include <linux/nfs_fs.h>
12 #include "delegation.h"
14 #define NFSDBG_FACILITY NFSDBG_CALLBACK
16 unsigned nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res)
18 struct nfs4_client *clp;
19 struct nfs_delegation *delegation;
20 struct nfs_inode *nfsi;
23 res->bitmap[0] = res->bitmap[1] = 0;
24 res->status = htonl(NFS4ERR_BADHANDLE);
25 clp = nfs4_find_client(&args->addr->sin_addr);
28 inode = nfs_delegation_find_inode(clp, &args->fh);
32 down_read(&nfsi->rwsem);
33 delegation = nfsi->delegation;
34 if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)
36 res->size = i_size_read(inode);
37 res->change_attr = delegation->change_attr;
38 if (nfsi->npages != 0)
40 res->ctime = inode->i_ctime;
41 res->mtime = inode->i_mtime;
42 res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) &
44 res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) &
48 up_read(&nfsi->rwsem);
53 dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res->status));
57 unsigned nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
59 struct nfs4_client *clp;
63 res = htonl(NFS4ERR_BADHANDLE);
64 clp = nfs4_find_client(&args->addr->sin_addr);
67 inode = nfs_delegation_find_inode(clp, &args->fh);
70 /* Set up a helper thread to actually return the delegation */
71 switch(nfs_async_inode_return_delegation(inode, &args->stateid)) {
76 res = htonl(NFS4ERR_BAD_STATEID);
79 res = htonl(NFS4ERR_RESOURCE);
85 dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res));