104 строки
2.5 KiB
C
104 строки
2.5 KiB
C
/*
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* linux/fs/nfs/callback_proc.c
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*
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* Copyright (C) 2004 Trond Myklebust
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*
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* NFSv4 callback procedures
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*/
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#include <linux/nfs4.h>
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#include <linux/nfs_fs.h>
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#include "nfs4_fs.h"
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#include "callback.h"
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#include "delegation.h"
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#include "internal.h"
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#ifdef NFS_DEBUG
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#define NFSDBG_FACILITY NFSDBG_CALLBACK
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#endif
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__be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res)
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{
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struct nfs_client *clp;
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struct nfs_delegation *delegation;
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struct nfs_inode *nfsi;
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struct inode *inode;
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res->bitmap[0] = res->bitmap[1] = 0;
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res->status = htonl(NFS4ERR_BADHANDLE);
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clp = nfs_find_client(args->addr, 4);
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if (clp == NULL)
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goto out;
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dprintk("NFS: GETATTR callback request from %s\n",
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rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR));
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inode = nfs_delegation_find_inode(clp, &args->fh);
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if (inode == NULL)
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goto out_putclient;
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nfsi = NFS_I(inode);
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down_read(&nfsi->rwsem);
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delegation = nfsi->delegation;
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if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)
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goto out_iput;
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res->size = i_size_read(inode);
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res->change_attr = delegation->change_attr;
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if (nfsi->npages != 0)
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res->change_attr++;
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res->ctime = inode->i_ctime;
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res->mtime = inode->i_mtime;
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res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) &
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args->bitmap[0];
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res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) &
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args->bitmap[1];
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res->status = 0;
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out_iput:
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up_read(&nfsi->rwsem);
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iput(inode);
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out_putclient:
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nfs_put_client(clp);
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out:
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dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status));
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return res->status;
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}
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__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
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{
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struct nfs_client *clp;
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struct inode *inode;
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__be32 res;
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res = htonl(NFS4ERR_BADHANDLE);
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clp = nfs_find_client(args->addr, 4);
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if (clp == NULL)
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goto out;
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dprintk("NFS: RECALL callback request from %s\n",
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rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR));
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do {
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struct nfs_client *prev = clp;
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inode = nfs_delegation_find_inode(clp, &args->fh);
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if (inode != NULL) {
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/* Set up a helper thread to actually return the delegation */
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switch(nfs_async_inode_return_delegation(inode, &args->stateid)) {
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case 0:
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res = 0;
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break;
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case -ENOENT:
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if (res != 0)
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res = htonl(NFS4ERR_BAD_STATEID);
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break;
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default:
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res = htonl(NFS4ERR_RESOURCE);
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}
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iput(inode);
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}
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clp = nfs_find_client_next(prev);
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nfs_put_client(prev);
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} while (clp != NULL);
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out:
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dprintk("%s: exit with status = %d\n", __func__, ntohl(res));
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return res;
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}
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