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Diffstat (limited to 'fs/nfsd/nfs4state.c')
-rw-r--r--fs/nfsd/nfs4state.c115
1 files changed, 105 insertions, 10 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 994dcf8e5420..a22016d0106f 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -127,6 +127,7 @@ static void free_session(struct nfsd4_session *);
static const struct nfsd4_callback_ops nfsd4_cb_recall_ops;
static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops;
+static const struct nfsd4_callback_ops nfsd4_cb_getattr_ops;
static struct workqueue_struct *laundry_wq;
@@ -1189,6 +1190,10 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp,
dp->dl_recalled = false;
nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,
&nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL);
+ nfsd4_init_cb(&dp->dl_cb_fattr.ncf_getattr, dp->dl_stid.sc_client,
+ &nfsd4_cb_getattr_ops, NFSPROC4_CLNT_CB_GETATTR);
+ dp->dl_cb_fattr.ncf_file_modified = false;
+ dp->dl_cb_fattr.ncf_cb_bmap[0] = FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE;
get_nfs4_file(fp);
dp->dl_stid.sc_file = fp;
return dp;
@@ -3044,11 +3049,59 @@ nfsd4_cb_recall_any_release(struct nfsd4_callback *cb)
spin_unlock(&nn->client_lock);
}
+static int
+nfsd4_cb_getattr_done(struct nfsd4_callback *cb, struct rpc_task *task)
+{
+ struct nfs4_cb_fattr *ncf =
+ container_of(cb, struct nfs4_cb_fattr, ncf_getattr);
+
+ ncf->ncf_cb_status = task->tk_status;
+ switch (task->tk_status) {
+ case -NFS4ERR_DELAY:
+ rpc_delay(task, 2 * HZ);
+ return 0;
+ default:
+ return 1;
+ }
+}
+
+static void
+nfsd4_cb_getattr_release(struct nfsd4_callback *cb)
+{
+ struct nfs4_cb_fattr *ncf =
+ container_of(cb, struct nfs4_cb_fattr, ncf_getattr);
+ struct nfs4_delegation *dp =
+ container_of(ncf, struct nfs4_delegation, dl_cb_fattr);
+
+ nfs4_put_stid(&dp->dl_stid);
+ clear_bit(CB_GETATTR_BUSY, &ncf->ncf_cb_flags);
+ wake_up_bit(&ncf->ncf_cb_flags, CB_GETATTR_BUSY);
+}
+
static const struct nfsd4_callback_ops nfsd4_cb_recall_any_ops = {
.done = nfsd4_cb_recall_any_done,
.release = nfsd4_cb_recall_any_release,
};
+static const struct nfsd4_callback_ops nfsd4_cb_getattr_ops = {
+ .done = nfsd4_cb_getattr_done,
+ .release = nfsd4_cb_getattr_release,
+};
+
+static void nfs4_cb_getattr(struct nfs4_cb_fattr *ncf)
+{
+ struct nfs4_delegation *dp =
+ container_of(ncf, struct nfs4_delegation, dl_cb_fattr);
+
+ if (test_and_set_bit(CB_GETATTR_BUSY, &ncf->ncf_cb_flags))
+ return;
+ /* set to proper status when nfsd4_cb_getattr_done runs */
+ ncf->ncf_cb_status = NFS4ERR_IO;
+
+ refcount_inc(&dp->dl_stid.sc_count);
+ nfsd4_run_cb(&ncf->ncf_getattr);
+}
+
static struct nfs4_client *create_client(struct xdr_netobj name,
struct svc_rqst *rqstp, nfs4_verifier *verf)
{
@@ -5854,6 +5907,8 @@ nfs4_open_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp,
struct svc_fh *parent = NULL;
int cb_up;
int status = 0;
+ struct kstat stat;
+ struct path path;
cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client);
open->op_recall = false;
@@ -5891,6 +5946,18 @@ nfs4_open_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp,
if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) {
open->op_delegate_type = NFS4_OPEN_DELEGATE_WRITE;
trace_nfsd_deleg_write(&dp->dl_stid.sc_stateid);
+ path.mnt = currentfh->fh_export->ex_path.mnt;
+ path.dentry = currentfh->fh_dentry;
+ if (vfs_getattr(&path, &stat,
+ (STATX_SIZE | STATX_CTIME | STATX_CHANGE_COOKIE),
+ AT_STATX_SYNC_AS_STAT)) {
+ nfs4_put_stid(&dp->dl_stid);
+ destroy_delegation(dp);
+ goto out_no_deleg;
+ }
+ dp->dl_cb_fattr.ncf_cur_fsize = stat.size;
+ dp->dl_cb_fattr.ncf_initial_cinfo =
+ nfsd4_change_attribute(&stat, d_inode(currentfh->fh_dentry));
} else {
open->op_delegate_type = NFS4_OPEN_DELEGATE_READ;
trace_nfsd_deleg_read(&dp->dl_stid.sc_stateid);
@@ -8710,6 +8777,8 @@ nfsd4_get_writestateid(struct nfsd4_compound_state *cstate,
* nfsd4_deleg_getattr_conflict - Recall if GETATTR causes conflict
* @rqstp: RPC transaction context
* @inode: file to be checked for a conflict
+ * @modified: return true if file was modified
+ * @size: new size of file if modified is true
*
* This function is called when there is a conflict between a write
* delegation and a change/size GETATTR from another client. The server
@@ -8718,22 +8787,22 @@ nfsd4_get_writestateid(struct nfsd4_compound_state *cstate,
* delegation before replying to the GETATTR. See RFC 8881 section
* 18.7.4.
*
- * The current implementation does not support CB_GETATTR yet. However
- * this can avoid recalling the delegation could be added in follow up
- * work.
- *
* Returns 0 if there is no conflict; otherwise an nfs_stat
* code is returned.
*/
__be32
-nfsd4_deleg_getattr_conflict(struct svc_rqst *rqstp, struct inode *inode)
+nfsd4_deleg_getattr_conflict(struct svc_rqst *rqstp, struct inode *inode,
+ bool *modified, u64 *size)
{
__be32 status;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
struct file_lock_context *ctx;
struct file_lock *fl;
struct nfs4_delegation *dp;
+ struct iattr attrs;
+ struct nfs4_cb_fattr *ncf;
+ *modified = false;
ctx = locks_inode_context(inode);
if (!ctx)
return 0;
@@ -8758,12 +8827,38 @@ nfsd4_deleg_getattr_conflict(struct svc_rqst *rqstp, struct inode *inode)
return 0;
}
break_lease:
- spin_unlock(&ctx->flc_lock);
nfsd_stats_wdeleg_getattr_inc(nn);
- status = nfserrno(nfsd_open_break_lease(inode, NFSD_MAY_READ));
- if (status != nfserr_jukebox ||
- !nfsd_wait_for_delegreturn(rqstp, inode))
- return status;
+ dp = fl->fl_owner;
+ ncf = &dp->dl_cb_fattr;
+ nfs4_cb_getattr(&dp->dl_cb_fattr);
+ spin_unlock(&ctx->flc_lock);
+ wait_on_bit_timeout(&ncf->ncf_cb_flags, CB_GETATTR_BUSY,
+ TASK_INTERRUPTIBLE, NFSD_CB_GETATTR_TIMEOUT);
+ if (ncf->ncf_cb_status) {
+ /* Recall delegation only if client didn't respond */
+ status = nfserrno(nfsd_open_break_lease(inode, NFSD_MAY_READ));
+ if (status != nfserr_jukebox ||
+ !nfsd_wait_for_delegreturn(rqstp, inode))
+ return status;
+ }
+ if (!ncf->ncf_file_modified &&
+ (ncf->ncf_initial_cinfo != ncf->ncf_cb_change ||
+ ncf->ncf_cur_fsize != ncf->ncf_cb_fsize))
+ ncf->ncf_file_modified = true;
+ if (ncf->ncf_file_modified) {
+ /*
+ * Per section 10.4.3 of RFC 8881, the server would
+ * not update the file's metadata with the client's
+ * modified size
+ */
+ attrs.ia_mtime = attrs.ia_ctime = current_time(inode);
+ attrs.ia_valid = ATTR_MTIME | ATTR_CTIME;
+ setattr_copy(&nop_mnt_idmap, inode, &attrs);
+ mark_inode_dirty(inode);
+ ncf->ncf_cur_fsize = ncf->ncf_cb_fsize;
+ *size = ncf->ncf_cur_fsize;
+ *modified = true;
+ }
return 0;
}
break;
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 04:20:28 +0000