Lines Matching defs:delegation
2 * linux/fs/nfs/delegation.c
6 * NFS file delegation management
20 #include "delegation.h"
23 static void nfs_free_delegation(struct nfs_delegation *delegation)
25 if (delegation->cred)
26 put_rpccred(delegation->cred);
27 kfree(delegation);
89 * Set up a delegation on an inode
93 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
95 if (delegation == NULL)
97 memcpy(delegation->stateid.data, res->delegation.data,
98 sizeof(delegation->stateid.data));
99 delegation->type = res->delegation_type;
100 delegation->maxsize = res->maxsize;
102 delegation->cred = get_rpccred(cred);
103 delegation->flags &= ~NFS_DELEGATION_NEED_RECLAIM;
104 NFS_I(inode)->delegation_state = delegation->type;
109 * Set up a delegation on an inode
115 struct nfs_delegation *delegation;
122 delegation = kmalloc(sizeof(*delegation), GFP_KERNEL);
123 if (delegation == NULL)
125 memcpy(delegation->stateid.data, res->delegation.data,
126 sizeof(delegation->stateid.data));
127 delegation->type = res->delegation_type;
128 delegation->maxsize = res->maxsize;
129 delegation->change_attr = nfsi->change_attr;
130 delegation->cred = get_rpccred(cred);
131 delegation->inode = inode;
134 if (nfsi->delegation == NULL) {
135 list_add(&delegation->super_list, &clp->cl_delegations);
136 nfsi->delegation = delegation;
137 nfsi->delegation_state = delegation->type;
138 delegation = NULL;
140 if (memcmp(&delegation->stateid, &nfsi->delegation->stateid,
141 sizeof(delegation->stateid)) != 0 ||
142 delegation->type != nfsi->delegation->type) {
143 printk("%s: server %u.%u.%u.%u, handed out a duplicate delegation!\n",
149 kfree(delegation);
153 static int nfs_do_return_delegation(struct inode *inode, struct nfs_delegation *delegation)
157 res = nfs4_proc_delegreturn(inode, delegation->cred, &delegation->stateid);
158 nfs_free_delegation(delegation);
162 /* Sync all data to disk upon delegation return */
171 * Basic procedure for returning a delegation to the server
177 struct nfs_delegation *delegation;
185 delegation = nfsi->delegation;
186 if (delegation != NULL) {
187 list_del_init(&delegation->super_list);
188 nfsi->delegation = NULL;
197 if (delegation != NULL)
198 res = nfs_do_return_delegation(inode, delegation);
208 struct nfs_delegation *delegation;
215 list_for_each_entry(delegation, &clp->cl_delegations, super_list) {
216 if (delegation->inode->i_sb != sb)
218 inode = igrab(delegation->inode);
232 struct nfs_delegation *delegation;
242 list_for_each_entry(delegation, &clp->cl_delegations, super_list) {
243 inode = igrab(delegation->inode);
277 struct nfs_delegation *delegation;
284 list_for_each_entry(delegation, &clp->cl_delegations, super_list) {
285 inode = igrab(delegation->inode);
311 struct nfs_delegation *delegation;
319 delegation = nfsi->delegation;
320 if (delegation != NULL && memcmp(delegation->stateid.data,
322 sizeof(delegation->stateid.data)) == 0) {
323 list_del_init(&delegation->super_list);
324 nfsi->delegation = NULL;
328 delegation = NULL;
338 if (delegation != NULL)
339 nfs_do_return_delegation(inode, delegation);
345 * Asynchronous delegation recall!
368 * Retrieve the inode associated with a delegation
372 struct nfs_delegation *delegation;
375 list_for_each_entry(delegation, &clp->cl_delegations, super_list) {
376 if (nfs_compare_fh(fhandle, &NFS_I(delegation->inode)->fh) == 0) {
377 res = igrab(delegation->inode);
390 struct nfs_delegation *delegation;
392 list_for_each_entry(delegation, &clp->cl_delegations, super_list)
393 delegation->flags |= NFS_DELEGATION_NEED_RECLAIM;
402 struct nfs_delegation *delegation, *n;
405 list_for_each_entry_safe(delegation, n, &clp->cl_delegations, super_list) {
406 if ((delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0)
408 list_move(&delegation->super_list, &head);
409 NFS_I(delegation->inode)->delegation = NULL;
410 NFS_I(delegation->inode)->delegation_state = 0;
414 delegation = list_entry(head.next, struct nfs_delegation, super_list);
415 list_del(&delegation->super_list);
416 nfs_free_delegation(delegation);
424 struct nfs_delegation *delegation;
430 delegation = nfsi->delegation;
431 if (delegation != NULL) {
432 memcpy(dst->data, delegation->stateid.data, sizeof(dst->data));