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1da177e4 LT |
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> | |
4ce79717 | 11 | #include "nfs4_fs.h" |
1da177e4 LT |
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 | } |