1 /* 2 * linux/fs/nfs/callback_proc.c 3 * 4 * Copyright (C) 2004 Trond Myklebust 5 * 6 * NFSv4 callback procedures 7 */ 8 #include <linux/config.h> 9 #include <linux/nfs4.h> 10 #include <linux/nfs_fs.h> 11 #include "nfs4_fs.h" 12 #include "callback.h" 13 #include "delegation.h" 14 15 #define NFSDBG_FACILITY NFSDBG_CALLBACK 16 17 unsigned nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res) 18 { 19 struct nfs4_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 = nfs4_find_client(&args->addr->sin_addr); 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 = NFS_CHANGE_ATTR(inode); 39 res->ctime = inode->i_ctime; 40 res->mtime = inode->i_mtime; 41 res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) & 42 args->bitmap[0]; 43 res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) & 44 args->bitmap[1]; 45 res->status = 0; 46 out_iput: 47 up_read(&nfsi->rwsem); 48 iput(inode); 49 out_putclient: 50 nfs4_put_client(clp); 51 out: 52 dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res->status)); 53 return res->status; 54 } 55 56 unsigned nfs4_callback_recall(struct cb_recallargs *args, void *dummy) 57 { 58 struct nfs4_client *clp; 59 struct inode *inode; 60 unsigned res; 61 62 res = htonl(NFS4ERR_BADHANDLE); 63 clp = nfs4_find_client(&args->addr->sin_addr); 64 if (clp == NULL) 65 goto out; 66 inode = nfs_delegation_find_inode(clp, &args->fh); 67 if (inode == NULL) 68 goto out_putclient; 69 /* Set up a helper thread to actually return the delegation */ 70 switch(nfs_async_inode_return_delegation(inode, &args->stateid)) { 71 case 0: 72 res = 0; 73 break; 74 case -ENOENT: 75 res = htonl(NFS4ERR_BAD_STATEID); 76 break; 77 default: 78 res = htonl(NFS4ERR_RESOURCE); 79 } 80 iput(inode); 81 out_putclient: 82 nfs4_put_client(clp); 83 out: 84 dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res)); 85 return res; 86 } 87