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-rw-r--r--fs/nfs/delegation.c1
-rw-r--r--fs/nfs/delegation.h6
-rw-r--r--fs/nfs/nfs4proc.c55
-rw-r--r--include/linux/nfs_fs.h1
-rw-r--r--include/linux/nfs_fs_sb.h1
5 files changed, 60 insertions, 4 deletions
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 9d3a5f29f17f..b4c192f00e94 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -379,6 +379,7 @@ nfs_detach_delegation_locked(struct nfs_inode *nfsi,
delegation->inode = NULL;
rcu_assign_pointer(nfsi->delegation, NULL);
spin_unlock(&delegation->lock);
+ clear_bit(NFS_INO_REQ_DIR_DELEG, &nfsi->flags);
return delegation;
}
diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
index 08ec2e9c68a4..def50e8a83bf 100644
--- a/fs/nfs/delegation.h
+++ b/fs/nfs/delegation.h
@@ -124,6 +124,12 @@ static inline int nfs_have_delegated_mtime(struct inode *inode)
NFS_DELEGATION_FLAG_TIME);
}
+static inline void nfs_request_directory_delegation(struct inode *inode)
+{
+ if (S_ISDIR(inode->i_mode))
+ set_bit(NFS_INO_REQ_DIR_DELEG, &NFS_I(inode)->flags);
+}
+
int nfs4_delegation_hash_alloc(struct nfs_server *server);
#endif
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 3b436ba2ed3b..99edc1d8d7aa 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4470,6 +4470,28 @@ out:
return status;
}
+#if IS_ENABLED(CONFIG_NFS_V4_1)
+static bool should_request_dir_deleg(struct inode *inode)
+{
+ if (!inode)
+ return false;
+ if (!S_ISDIR(inode->i_mode))
+ return false;
+ if (!nfs_server_capable(inode, NFS_CAP_DIR_DELEG))
+ return false;
+ if (!test_and_clear_bit(NFS_INO_REQ_DIR_DELEG, &(NFS_I(inode)->flags)))
+ return false;
+ if (nfs4_have_delegation(inode, FMODE_READ, 0))
+ return false;
+ return true;
+}
+#else
+static bool should_request_dir_deleg(struct inode *inode)
+{
+ return false;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fattr *fattr, struct inode *inode)
{
@@ -4487,7 +4509,9 @@ static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
.rpc_argp = &args,
.rpc_resp = &res,
};
+ struct nfs4_gdd_res gdd_res;
unsigned short task_flags = 0;
+ int status;
if (nfs4_has_session(server->nfs_client))
task_flags = RPC_TASK_MOVEABLE;
@@ -4496,11 +4520,26 @@ static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
if (inode && (server->flags & NFS_MOUNT_SOFTREVAL))
task_flags |= RPC_TASK_TIMEOUT;
+ args.get_dir_deleg = should_request_dir_deleg(inode);
+ if (args.get_dir_deleg)
+ res.gdd_res = &gdd_res;
+
nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0);
nfs_fattr_init(fattr);
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
- return nfs4_do_call_sync(server->client, server, &msg,
- &args.seq_args, &res.seq_res, task_flags);
+
+ status = nfs4_do_call_sync(server->client, server, &msg,
+ &args.seq_args, &res.seq_res, task_flags);
+ if (args.get_dir_deleg) {
+ if (status == -EOPNOTSUPP) {
+ server->caps &= ~NFS_CAP_DIR_DELEG;
+ } else if (status == 0 && gdd_res.status == GDD4_OK) {
+ status = nfs_inode_set_delegation(inode, current_cred(),
+ FMODE_READ, &gdd_res.deleg,
+ 0, NFS4_OPEN_DELEGATE_READ);
+ }
+ }
+ return status;
}
int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
@@ -4513,8 +4552,10 @@ int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
do {
err = _nfs4_proc_getattr(server, fhandle, fattr, inode);
trace_nfs4_getattr(server, fhandle, fattr, err);
- err = nfs4_handle_exception(server, err,
- &exception);
+ if (err == -EOPNOTSUPP)
+ exception.retry = true;
+ else
+ err = nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
return err;
}
@@ -4778,6 +4819,7 @@ static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry
int status = 0;
if (!nfs4_have_delegation(inode, FMODE_READ, 0)) {
+ nfs_request_directory_delegation(inode);
res.fattr = nfs_alloc_fattr();
if (res.fattr == NULL)
return -ENOMEM;
@@ -4885,6 +4927,8 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
+ nfs_request_directory_delegation(dir);
+
if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
sattr->ia_mode &= ~current_umask();
state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
@@ -4981,6 +5025,7 @@ static void nfs4_proc_unlink_setup(struct rpc_message *msg,
nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0);
nfs_fattr_init(res->dir_attr);
+ nfs_request_directory_delegation(d_inode(dentry->d_parent));
if (inode) {
nfs4_inode_return_delegation(inode);
@@ -10832,6 +10877,7 @@ static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
.minor_version = 1,
.init_caps = NFS_CAP_READDIRPLUS
| NFS_CAP_ATOMIC_OPEN
+ | NFS_CAP_DIR_DELEG
| NFS_CAP_POSIX_LOCK
| NFS_CAP_STATEID_NFSV41
| NFS_CAP_ATOMIC_OPEN_V1
@@ -10858,6 +10904,7 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
.minor_version = 2,
.init_caps = NFS_CAP_READDIRPLUS
| NFS_CAP_ATOMIC_OPEN
+ | NFS_CAP_DIR_DELEG
| NFS_CAP_POSIX_LOCK
| NFS_CAP_STATEID_NFSV41
| NFS_CAP_ATOMIC_OPEN_V1
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index c585939b6cd6..a6624edb7226 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -344,6 +344,7 @@ struct nfs4_copy_state {
#define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */
#define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */
#define NFS_INO_ODIRECT (12) /* I/O setting is O_DIRECT */
+#define NFS_INO_REQ_DIR_DELEG (13) /* Request a directory delegation */
static inline struct nfs_inode *NFS_I(const struct inode *inode)
{
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index d30c0245031c..4ba04de6b1ca 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -305,6 +305,7 @@ struct nfs_server {
#define NFS_CAP_REBOOT_LAYOUTRETURN (1U << 8)
#define NFS_CAP_OFFLOAD_STATUS (1U << 9)
#define NFS_CAP_ZERO_RANGE (1U << 10)
+#define NFS_CAP_DIR_DELEG (1U << 11)
#define NFS_CAP_OPEN_XOR (1U << 12)
#define NFS_CAP_DELEGTIME (1U << 13)
#define NFS_CAP_POSIX_LOCK (1U << 14)
generated by cgit v1.2.3 (git 2.0.4) at 2025-12-24 23:54:12 +0000