2 * linux/fs/nfs/callback_proc.c
4 * Copyright (C) 2004 Trond Myklebust
6 * NFSv4 callback procedures
8 #include <linux/config.h>
9 #include <linux/nfs4.h>
10 #include <linux/nfs_fs.h>
13 #include "delegation.h"
15 #define NFSDBG_FACILITY NFSDBG_CALLBACK
17 unsigned nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res)
19 struct nfs4_client *clp;
20 struct nfs_delegation *delegation;
21 struct nfs_inode *nfsi;
24 res->bitmap[0] = res->bitmap[1] = 0;
25 res->status = htonl(NFS4ERR_BADHANDLE);
26 clp = nfs4_find_client(&args->addr->sin_addr);
29 inode = nfs_delegation_find_inode(clp, &args->fh);
33 down_read(&nfsi->rwsem);
34 delegation = nfsi->delegation;
35 if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)
37 res->size = i_size_read(inode);
38 res->change_attr = delegation->change_attr;
39 if (nfsi->npages != 0)
41 res->ctime = inode->i_ctime;
42 res->mtime = inode->i_mtime;
43 res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) &
45 res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) &
49 up_read(&nfsi->rwsem);
54 dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res->status));
58 unsigned nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
60 struct nfs4_client *clp;
64 res = htonl(NFS4ERR_BADHANDLE);
65 clp = nfs4_find_client(&args->addr->sin_addr);
68 inode = nfs_delegation_find_inode(clp, &args->fh);
71 /* Set up a helper thread to actually return the delegation */
72 switch(nfs_async_inode_return_delegation(inode, &args->stateid)) {
77 res = htonl(NFS4ERR_BAD_STATEID);
80 res = htonl(NFS4ERR_RESOURCE);
86 dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res));