1 /* 2 * linux/fs/nfs/callback_proc.c 3 * 4 * Copyright (C) 2004 Trond Myklebust 5 * 6 * NFSv4 callback procedures 7 */ 8 #include <linux/nfs4.h> 9 #include <linux/nfs_fs.h> 10 #include "nfs4_fs.h" 11 #include "callback.h" 12 #include "delegation.h" 13 #include "internal.h" 14 15 #define NFSDBG_FACILITY NFSDBG_CALLBACK 16 17 __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res) 18 { 19 struct nfs_client *clp; 20 struct nfs_delegation *delegation; 21 struct nfs_inode *nfsi; 22 struct inode *inode; 23 24 res->bitmap[0] = res->bitmap[1] = 0; 25 res->status = htonl(NFS4ERR_BADHANDLE); 26 clp = nfs_find_client(args->addr, 4); 27 if (clp == NULL) 28 goto out; 29 inode = nfs_delegation_find_inode(clp, &args->fh); 30 if (inode == NULL) 31 goto out_putclient; 32 nfsi = NFS_I(inode); 33 down_read(&nfsi->rwsem); 34 delegation = nfsi->delegation; 35 if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0) 36 goto out_iput; 37 res->size = i_size_read(inode); 38 res->change_attr = delegation->change_attr; 39 if (nfsi->npages != 0) 40 res->change_attr++; 41 res->ctime = inode->i_ctime; 42 res->mtime = inode->i_mtime; 43 res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) & 44 args->bitmap[0]; 45 res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) & 46 args->bitmap[1]; 47 res->status = 0; 48 out_iput: 49 up_read(&nfsi->rwsem); 50 iput(inode); 51 out_putclient: 52 nfs_put_client(clp); 53 out: 54 dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res->status)); 55 return res->status; 56 } 57 58 __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy) 59 { 60 struct nfs_client *clp; 61 struct inode *inode; 62 __be32 res; 63 64 res = htonl(NFS4ERR_BADHANDLE); 65 clp = nfs_find_client(args->addr, 4); 66 if (clp == NULL) 67 goto out; 68 inode = nfs_delegation_find_inode(clp, &args->fh); 69 if (inode == NULL) 70 goto out_putclient; 71 /* Set up a helper thread to actually return the delegation */ 72 switch(nfs_async_inode_return_delegation(inode, &args->stateid)) { 73 case 0: 74 res = 0; 75 break; 76 case -ENOENT: 77 res = htonl(NFS4ERR_BAD_STATEID); 78 break; 79 default: 80 res = htonl(NFS4ERR_RESOURCE); 81 } 82 iput(inode); 83 out_putclient: 84 nfs_put_client(clp); 85 out: 86 dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res)); 87 return res; 88 } 89