[ACPI] merge acpi-2.6.12 branch into latest Linux 2.6.13-rc...
[linux-2.6] / fs / nfs / callback_proc.c
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 }