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 14 #define NFSDBG_FACILITY NFSDBG_CALLBACK 15 16 unsigned nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res) 17 { 18 struct nfs4_client *clp; 19 struct nfs_delegation *delegation; 20 struct nfs_inode *nfsi; 21 struct inode *inode; 22 23 res->bitmap[0] = res->bitmap[1] = 0; 24 res->status = htonl(NFS4ERR_BADHANDLE); 25 clp = nfs4_find_client(&args->addr->sin_addr); 26 if (clp == NULL) 27 goto out; 28 inode = nfs_delegation_find_inode(clp, &args->fh); 29 if (inode == NULL) 30 goto out_putclient; 31 nfsi = NFS_I(inode); 32 down_read(&nfsi->rwsem); 33 delegation = nfsi->delegation; 34 if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0) 35 goto out_iput; 36 res->size = i_size_read(inode); 37 res->change_attr = delegation->change_attr; 38 if (nfsi->npages != 0) 39 res->change_attr++; 40 res->ctime = inode->i_ctime; 41 res->mtime = inode->i_mtime; 42 res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) & 43 args->bitmap[0]; 44 res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) & 45 args->bitmap[1]; 46 res->status = 0; 47 out_iput: 48 up_read(&nfsi->rwsem); 49 iput(inode); 50 out_putclient: 51 nfs4_put_client(clp); 52 out: 53 dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res->status)); 54 return res->status; 55 } 56 57 unsigned nfs4_callback_recall(struct cb_recallargs *args, void *dummy) 58 { 59 struct nfs4_client *clp; 60 struct inode *inode; 61 unsigned res; 62 63 res = htonl(NFS4ERR_BADHANDLE); 64 clp = nfs4_find_client(&args->addr->sin_addr); 65 if (clp == NULL) 66 goto out; 67 inode = nfs_delegation_find_inode(clp, &args->fh); 68 if (inode == NULL) 69 goto out_putclient; 70 /* Set up a helper thread to actually return the delegation */ 71 switch(nfs_async_inode_return_delegation(inode, &args->stateid)) { 72 case 0: 73 res = 0; 74 break; 75 case -ENOENT: 76 res = htonl(NFS4ERR_BAD_STATEID); 77 break; 78 default: 79 res = htonl(NFS4ERR_RESOURCE); 80 } 81 iput(inode); 82 out_putclient: 83 nfs4_put_client(clp); 84 out: 85 dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res)); 86 return res; 87 } 88