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 "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 = NFS_CHANGE_ATTR(inode); 38 res->ctime = inode->i_ctime; 39 res->mtime = inode->i_mtime; 40 res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) & 41 args->bitmap[0]; 42 res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) & 43 args->bitmap[1]; 44 res->status = 0; 45 out_iput: 46 up_read(&nfsi->rwsem); 47 iput(inode); 48 out_putclient: 49 nfs4_put_client(clp); 50 out: 51 dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res->status)); 52 return res->status; 53 } 54 55 unsigned nfs4_callback_recall(struct cb_recallargs *args, void *dummy) 56 { 57 struct nfs4_client *clp; 58 struct inode *inode; 59 unsigned res; 60 61 res = htonl(NFS4ERR_BADHANDLE); 62 clp = nfs4_find_client(&args->addr->sin_addr); 63 if (clp == NULL) 64 goto out; 65 inode = nfs_delegation_find_inode(clp, &args->fh); 66 if (inode == NULL) 67 goto out_putclient; 68 /* Set up a helper thread to actually return the delegation */ 69 switch(nfs_async_inode_return_delegation(inode, &args->stateid)) { 70 case 0: 71 res = 0; 72 break; 73 case -ENOENT: 74 res = htonl(NFS4ERR_BAD_STATEID); 75 break; 76 default: 77 res = htonl(NFS4ERR_RESOURCE); 78 } 79 iput(inode); 80 out_putclient: 81 nfs4_put_client(clp); 82 out: 83 dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res)); 84 return res; 85 } 86