diff options
Diffstat (limited to 'fs/nfs/nfs42proc.c')
| -rw-r--r-- | fs/nfs/nfs42proc.c | 1443 |
1 files changed, 1443 insertions, 0 deletions
diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c new file mode 100644 index 000000000..5a8fe0e57 --- /dev/null +++ b/fs/nfs/nfs42proc.c @@ -0,0 +1,1443 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> + */ +#include <linux/fs.h> +#include <linux/sunrpc/addr.h> +#include <linux/sunrpc/sched.h> +#include <linux/nfs.h> +#include <linux/nfs3.h> +#include <linux/nfs4.h> +#include <linux/nfs_xdr.h> +#include <linux/nfs_fs.h> +#include "nfs4_fs.h" +#include "nfs42.h" +#include "iostat.h" +#include "pnfs.h" +#include "nfs4session.h" +#include "internal.h" +#include "delegation.h" +#include "nfs4trace.h" + +#define NFSDBG_FACILITY NFSDBG_PROC +static int nfs42_do_offload_cancel_async(struct file *dst, nfs4_stateid *std); + +static void nfs42_set_netaddr(struct file *filep, struct nfs42_netaddr *naddr) +{ + struct nfs_client *clp = (NFS_SERVER(file_inode(filep)))->nfs_client; + unsigned short port = 2049; + + rcu_read_lock(); + naddr->netid_len = scnprintf(naddr->netid, + sizeof(naddr->netid), "%s", + rpc_peeraddr2str(clp->cl_rpcclient, + RPC_DISPLAY_NETID)); + naddr->addr_len = scnprintf(naddr->addr, + sizeof(naddr->addr), + "%s.%u.%u", + rpc_peeraddr2str(clp->cl_rpcclient, + RPC_DISPLAY_ADDR), + port >> 8, port & 255); + rcu_read_unlock(); +} + +static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, + struct nfs_lock_context *lock, loff_t offset, loff_t len) +{ + struct inode *inode = file_inode(filep); + struct nfs_server *server = NFS_SERVER(inode); + u32 bitmask[NFS_BITMASK_SZ]; + struct nfs42_falloc_args args = { + .falloc_fh = NFS_FH(inode), + .falloc_offset = offset, + .falloc_length = len, + .falloc_bitmask = bitmask, + }; + struct nfs42_falloc_res res = { + .falloc_server = server, + }; + int status; + + msg->rpc_argp = &args; + msg->rpc_resp = &res; + + status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context, + lock, FMODE_WRITE); + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; + return status; + } + + nfs4_bitmask_set(bitmask, server->cache_consistency_bitmask, inode, + NFS_INO_INVALID_BLOCKS); + + res.falloc_fattr = nfs_alloc_fattr(); + if (!res.falloc_fattr) + return -ENOMEM; + + status = nfs4_call_sync(server->client, server, msg, + &args.seq_args, &res.seq_res, 0); + if (status == 0) { + if (nfs_should_remove_suid(inode)) { + spin_lock(&inode->i_lock); + nfs_set_cache_invalid(inode, + NFS_INO_REVAL_FORCED | NFS_INO_INVALID_MODE); + spin_unlock(&inode->i_lock); + } + status = nfs_post_op_update_inode_force_wcc(inode, + res.falloc_fattr); + } + if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE]) + trace_nfs4_fallocate(inode, &args, status); + else + trace_nfs4_deallocate(inode, &args, status); + kfree(res.falloc_fattr); + return status; +} + +static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep, + loff_t offset, loff_t len) +{ + struct inode *inode = file_inode(filep); + struct nfs_server *server = NFS_SERVER(inode); + struct nfs4_exception exception = { }; + struct nfs_lock_context *lock; + int err; + + lock = nfs_get_lock_context(nfs_file_open_context(filep)); + if (IS_ERR(lock)) + return PTR_ERR(lock); + + exception.inode = inode; + exception.state = lock->open_context->state; + + err = nfs_sync_inode(inode); + if (err) + goto out; + + do { + err = _nfs42_proc_fallocate(msg, filep, lock, offset, len); + if (err == -ENOTSUPP) { + err = -EOPNOTSUPP; + break; + } + err = nfs4_handle_exception(server, err, &exception); + } while (exception.retry); +out: + nfs_put_lock_context(lock); + return err; +} + +int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len) +{ + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE], + }; + struct inode *inode = file_inode(filep); + int err; + + if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE)) + return -EOPNOTSUPP; + + inode_lock(inode); + + err = nfs42_proc_fallocate(&msg, filep, offset, len); + if (err == -EOPNOTSUPP) + NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE; + + inode_unlock(inode); + return err; +} + +int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) +{ + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], + }; + struct inode *inode = file_inode(filep); + int err; + + if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) + return -EOPNOTSUPP; + + inode_lock(inode); + + err = nfs42_proc_fallocate(&msg, filep, offset, len); + if (err == 0) + truncate_pagecache_range(inode, offset, (offset + len) -1); + if (err == -EOPNOTSUPP) + NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; + + inode_unlock(inode); + return err; +} + +static int handle_async_copy(struct nfs42_copy_res *res, + struct nfs_server *dst_server, + struct nfs_server *src_server, + struct file *src, + struct file *dst, + nfs4_stateid *src_stateid, + bool *restart) +{ + struct nfs4_copy_state *copy, *tmp_copy = NULL, *iter; + int status = NFS4_OK; + struct nfs_open_context *dst_ctx = nfs_file_open_context(dst); + struct nfs_open_context *src_ctx = nfs_file_open_context(src); + + copy = kzalloc(sizeof(struct nfs4_copy_state), GFP_KERNEL); + if (!copy) + return -ENOMEM; + + spin_lock(&dst_server->nfs_client->cl_lock); + list_for_each_entry(iter, + &dst_server->nfs_client->pending_cb_stateids, + copies) { + if (memcmp(&res->write_res.stateid, &iter->stateid, + NFS4_STATEID_SIZE)) + continue; + tmp_copy = iter; + list_del(&iter->copies); + break; + } + if (tmp_copy) { + spin_unlock(&dst_server->nfs_client->cl_lock); + kfree(copy); + copy = tmp_copy; + goto out; + } + + memcpy(©->stateid, &res->write_res.stateid, NFS4_STATEID_SIZE); + init_completion(©->completion); + copy->parent_dst_state = dst_ctx->state; + copy->parent_src_state = src_ctx->state; + + list_add_tail(©->copies, &dst_server->ss_copies); + spin_unlock(&dst_server->nfs_client->cl_lock); + + if (dst_server != src_server) { + spin_lock(&src_server->nfs_client->cl_lock); + list_add_tail(©->src_copies, &src_server->ss_copies); + spin_unlock(&src_server->nfs_client->cl_lock); + } + + status = wait_for_completion_interruptible(©->completion); + spin_lock(&dst_server->nfs_client->cl_lock); + list_del_init(©->copies); + spin_unlock(&dst_server->nfs_client->cl_lock); + if (dst_server != src_server) { + spin_lock(&src_server->nfs_client->cl_lock); + list_del_init(©->src_copies); + spin_unlock(&src_server->nfs_client->cl_lock); + } + if (status == -ERESTARTSYS) { + goto out_cancel; + } else if (copy->flags || copy->error == NFS4ERR_PARTNER_NO_AUTH) { + status = -EAGAIN; + *restart = true; + goto out_cancel; + } +out: + res->write_res.count = copy->count; + memcpy(&res->write_res.verifier, ©->verf, sizeof(copy->verf)); + status = -copy->error; + +out_free: + kfree(copy); + return status; +out_cancel: + nfs42_do_offload_cancel_async(dst, ©->stateid); + if (!nfs42_files_from_same_server(src, dst)) + nfs42_do_offload_cancel_async(src, src_stateid); + goto out_free; +} + +static int process_copy_commit(struct file *dst, loff_t pos_dst, + struct nfs42_copy_res *res) +{ + struct nfs_commitres cres; + int status = -ENOMEM; + + cres.verf = kzalloc(sizeof(struct nfs_writeverf), GFP_KERNEL); + if (!cres.verf) + goto out; + + status = nfs4_proc_commit(dst, pos_dst, res->write_res.count, &cres); + if (status) + goto out_free; + if (nfs_write_verifier_cmp(&res->write_res.verifier.verifier, + &cres.verf->verifier)) { + dprintk("commit verf differs from copy verf\n"); + status = -EAGAIN; + } +out_free: + kfree(cres.verf); +out: + return status; +} + +/** + * nfs42_copy_dest_done - perform inode cache updates after clone/copy offload + * @inode: pointer to destination inode + * @pos: destination offset + * @len: copy length + * + * Punch a hole in the inode page cache, so that the NFS client will + * know to retrieve new data. + * Update the file size if necessary, and then mark the inode as having + * invalid cached values for change attribute, ctime, mtime and space used. + */ +static void nfs42_copy_dest_done(struct inode *inode, loff_t pos, loff_t len) +{ + loff_t newsize = pos + len; + loff_t end = newsize - 1; + + WARN_ON_ONCE(invalidate_inode_pages2_range(inode->i_mapping, + pos >> PAGE_SHIFT, end >> PAGE_SHIFT)); + + spin_lock(&inode->i_lock); + if (newsize > i_size_read(inode)) + i_size_write(inode, newsize); + nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | + NFS_INO_INVALID_CTIME | + NFS_INO_INVALID_MTIME | + NFS_INO_INVALID_BLOCKS); + spin_unlock(&inode->i_lock); +} + +static ssize_t _nfs42_proc_copy(struct file *src, + struct nfs_lock_context *src_lock, + struct file *dst, + struct nfs_lock_context *dst_lock, + struct nfs42_copy_args *args, + struct nfs42_copy_res *res, + struct nl4_server *nss, + nfs4_stateid *cnr_stateid, + bool *restart) +{ + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY], + .rpc_argp = args, + .rpc_resp = res, + }; + struct inode *dst_inode = file_inode(dst); + struct inode *src_inode = file_inode(src); + struct nfs_server *dst_server = NFS_SERVER(dst_inode); + struct nfs_server *src_server = NFS_SERVER(src_inode); + loff_t pos_src = args->src_pos; + loff_t pos_dst = args->dst_pos; + size_t count = args->count; + ssize_t status; + + if (nss) { + args->cp_src = nss; + nfs4_stateid_copy(&args->src_stateid, cnr_stateid); + } else { + status = nfs4_set_rw_stateid(&args->src_stateid, + src_lock->open_context, src_lock, FMODE_READ); + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; + return status; + } + } + status = nfs_filemap_write_and_wait_range(src->f_mapping, + pos_src, pos_src + (loff_t)count - 1); + if (status) + return status; + + status = nfs4_set_rw_stateid(&args->dst_stateid, dst_lock->open_context, + dst_lock, FMODE_WRITE); + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; + return status; + } + + status = nfs_sync_inode(dst_inode); + if (status) + return status; + + res->commit_res.verf = NULL; + if (args->sync) { + res->commit_res.verf = + kzalloc(sizeof(struct nfs_writeverf), GFP_KERNEL); + if (!res->commit_res.verf) + return -ENOMEM; + } + set_bit(NFS_CLNT_SRC_SSC_COPY_STATE, + &src_lock->open_context->state->flags); + set_bit(NFS_CLNT_DST_SSC_COPY_STATE, + &dst_lock->open_context->state->flags); + + status = nfs4_call_sync(dst_server->client, dst_server, &msg, + &args->seq_args, &res->seq_res, 0); + trace_nfs4_copy(src_inode, dst_inode, args, res, nss, status); + if (status == -ENOTSUPP) + dst_server->caps &= ~NFS_CAP_COPY; + if (status) + goto out; + + if (args->sync && + nfs_write_verifier_cmp(&res->write_res.verifier.verifier, + &res->commit_res.verf->verifier)) { + status = -EAGAIN; + goto out; + } + + if (!res->synchronous) { + status = handle_async_copy(res, dst_server, src_server, src, + dst, &args->src_stateid, restart); + if (status) + goto out; + } + + if ((!res->synchronous || !args->sync) && + res->write_res.verifier.committed != NFS_FILE_SYNC) { + status = process_copy_commit(dst, pos_dst, res); + if (status) + goto out; + } + + nfs42_copy_dest_done(dst_inode, pos_dst, res->write_res.count); + nfs_invalidate_atime(src_inode); + status = res->write_res.count; +out: + if (args->sync) + kfree(res->commit_res.verf); + return status; +} + +ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src, + struct file *dst, loff_t pos_dst, size_t count, + struct nl4_server *nss, + nfs4_stateid *cnr_stateid, bool sync) +{ + struct nfs_server *server = NFS_SERVER(file_inode(dst)); + struct nfs_lock_context *src_lock; + struct nfs_lock_context *dst_lock; + struct nfs42_copy_args args = { + .src_fh = NFS_FH(file_inode(src)), + .src_pos = pos_src, + .dst_fh = NFS_FH(file_inode(dst)), + .dst_pos = pos_dst, + .count = count, + .sync = sync, + }; + struct nfs42_copy_res res; + struct nfs4_exception src_exception = { + .inode = file_inode(src), + .stateid = &args.src_stateid, + }; + struct nfs4_exception dst_exception = { + .inode = file_inode(dst), + .stateid = &args.dst_stateid, + }; + ssize_t err, err2; + bool restart = false; + + src_lock = nfs_get_lock_context(nfs_file_open_context(src)); + if (IS_ERR(src_lock)) + return PTR_ERR(src_lock); + + src_exception.state = src_lock->open_context->state; + + dst_lock = nfs_get_lock_context(nfs_file_open_context(dst)); + if (IS_ERR(dst_lock)) { + err = PTR_ERR(dst_lock); + goto out_put_src_lock; + } + + dst_exception.state = dst_lock->open_context->state; + + do { + inode_lock(file_inode(dst)); + err = _nfs42_proc_copy(src, src_lock, + dst, dst_lock, + &args, &res, + nss, cnr_stateid, &restart); + inode_unlock(file_inode(dst)); + + if (err >= 0) + break; + if (err == -ENOTSUPP && + nfs42_files_from_same_server(src, dst)) { + err = -EOPNOTSUPP; + break; + } else if (err == -EAGAIN) { + if (!restart) { + dst_exception.retry = 1; + continue; + } + break; + } else if (err == -NFS4ERR_OFFLOAD_NO_REQS && + args.sync != res.synchronous) { + args.sync = res.synchronous; + dst_exception.retry = 1; + continue; + } else if ((err == -ESTALE || + err == -NFS4ERR_OFFLOAD_DENIED || + err == -ENOTSUPP) && + !nfs42_files_from_same_server(src, dst)) { + nfs42_do_offload_cancel_async(src, &args.src_stateid); + err = -EOPNOTSUPP; + break; + } + + err2 = nfs4_handle_exception(server, err, &src_exception); + err = nfs4_handle_exception(server, err, &dst_exception); + if (!err) + err = err2; + } while (src_exception.retry || dst_exception.retry); + + nfs_put_lock_context(dst_lock); +out_put_src_lock: + nfs_put_lock_context(src_lock); + return err; +} + +struct nfs42_offloadcancel_data { + struct nfs_server *seq_server; + struct nfs42_offload_status_args args; + struct nfs42_offload_status_res res; +}; + +static void nfs42_offload_cancel_prepare(struct rpc_task *task, void *calldata) +{ + struct nfs42_offloadcancel_data *data = calldata; + + nfs4_setup_sequence(data->seq_server->nfs_client, + &data->args.osa_seq_args, + &data->res.osr_seq_res, task); +} + +static void nfs42_offload_cancel_done(struct rpc_task *task, void *calldata) +{ + struct nfs42_offloadcancel_data *data = calldata; + + trace_nfs4_offload_cancel(&data->args, task->tk_status); + nfs41_sequence_done(task, &data->res.osr_seq_res); + if (task->tk_status && + nfs4_async_handle_error(task, data->seq_server, NULL, + NULL) == -EAGAIN) + rpc_restart_call_prepare(task); +} + +static void nfs42_free_offloadcancel_data(void *data) +{ + kfree(data); +} + +static const struct rpc_call_ops nfs42_offload_cancel_ops = { + .rpc_call_prepare = nfs42_offload_cancel_prepare, + .rpc_call_done = nfs42_offload_cancel_done, + .rpc_release = nfs42_free_offloadcancel_data, +}; + +static int nfs42_do_offload_cancel_async(struct file *dst, + nfs4_stateid *stateid) +{ + struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); + struct nfs42_offloadcancel_data *data = NULL; + struct nfs_open_context *ctx = nfs_file_open_context(dst); + struct rpc_task *task; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OFFLOAD_CANCEL], + .rpc_cred = ctx->cred, + }; + struct rpc_task_setup task_setup_data = { + .rpc_client = dst_server->client, + .rpc_message = &msg, + .callback_ops = &nfs42_offload_cancel_ops, + .workqueue = nfsiod_workqueue, + .flags = RPC_TASK_ASYNC, + }; + int status; + + if (!(dst_server->caps & NFS_CAP_OFFLOAD_CANCEL)) + return -EOPNOTSUPP; + + data = kzalloc(sizeof(struct nfs42_offloadcancel_data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + + data->seq_server = dst_server; + data->args.osa_src_fh = NFS_FH(file_inode(dst)); + memcpy(&data->args.osa_stateid, stateid, + sizeof(data->args.osa_stateid)); + msg.rpc_argp = &data->args; + msg.rpc_resp = &data->res; + task_setup_data.callback_data = data; + nfs4_init_sequence(&data->args.osa_seq_args, &data->res.osr_seq_res, + 1, 0); + task = rpc_run_task(&task_setup_data); + if (IS_ERR(task)) + return PTR_ERR(task); + status = rpc_wait_for_completion_task(task); + if (status == -ENOTSUPP) + dst_server->caps &= ~NFS_CAP_OFFLOAD_CANCEL; + rpc_put_task(task); + return status; +} + +static int _nfs42_proc_copy_notify(struct file *src, struct file *dst, + struct nfs42_copy_notify_args *args, + struct nfs42_copy_notify_res *res) +{ + struct nfs_server *src_server = NFS_SERVER(file_inode(src)); + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY_NOTIFY], + .rpc_argp = args, + .rpc_resp = res, + }; + int status; + struct nfs_open_context *ctx; + struct nfs_lock_context *l_ctx; + + ctx = get_nfs_open_context(nfs_file_open_context(src)); + l_ctx = nfs_get_lock_context(ctx); + if (IS_ERR(l_ctx)) { + status = PTR_ERR(l_ctx); + goto out; + } + + status = nfs4_set_rw_stateid(&args->cna_src_stateid, ctx, l_ctx, + FMODE_READ); + nfs_put_lock_context(l_ctx); + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; + goto out; + } + + status = nfs4_call_sync(src_server->client, src_server, &msg, + &args->cna_seq_args, &res->cnr_seq_res, 0); + trace_nfs4_copy_notify(file_inode(src), args, res, status); + if (status == -ENOTSUPP) + src_server->caps &= ~NFS_CAP_COPY_NOTIFY; + +out: + put_nfs_open_context(nfs_file_open_context(src)); + return status; +} + +int nfs42_proc_copy_notify(struct file *src, struct file *dst, + struct nfs42_copy_notify_res *res) +{ + struct nfs_server *src_server = NFS_SERVER(file_inode(src)); + struct nfs42_copy_notify_args *args; + struct nfs4_exception exception = { + .inode = file_inode(src), + }; + int status; + + if (!(src_server->caps & NFS_CAP_COPY_NOTIFY)) + return -EOPNOTSUPP; + + args = kzalloc(sizeof(struct nfs42_copy_notify_args), GFP_KERNEL); + if (args == NULL) + return -ENOMEM; + + args->cna_src_fh = NFS_FH(file_inode(src)), + args->cna_dst.nl4_type = NL4_NETADDR; + nfs42_set_netaddr(dst, &args->cna_dst.u.nl4_addr); + exception.stateid = &args->cna_src_stateid; + + do { + status = _nfs42_proc_copy_notify(src, dst, args, res); + if (status == -ENOTSUPP) { + status = -EOPNOTSUPP; + goto out; + } + status = nfs4_handle_exception(src_server, status, &exception); + } while (exception.retry); + +out: + kfree(args); + return status; +} + +static loff_t _nfs42_proc_llseek(struct file *filep, + struct nfs_lock_context *lock, loff_t offset, int whence) +{ + struct inode *inode = file_inode(filep); + struct nfs42_seek_args args = { + .sa_fh = NFS_FH(inode), + .sa_offset = offset, + .sa_what = (whence == SEEK_HOLE) ? + NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, + }; + struct nfs42_seek_res res; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], + .rpc_argp = &args, + .rpc_resp = &res, + }; + struct nfs_server *server = NFS_SERVER(inode); + int status; + + if (!nfs_server_capable(inode, NFS_CAP_SEEK)) + return -ENOTSUPP; + + status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context, + lock, FMODE_READ); + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; + return status; + } + + status = nfs_filemap_write_and_wait_range(inode->i_mapping, + offset, LLONG_MAX); + if (status) + return status; + + status = nfs4_call_sync(server->client, server, &msg, + &args.seq_args, &res.seq_res, 0); + trace_nfs4_llseek(inode, &args, &res, status); + if (status == -ENOTSUPP) + server->caps &= ~NFS_CAP_SEEK; + if (status) + return status; + + if (whence == SEEK_DATA && res.sr_eof) + return -NFS4ERR_NXIO; + else + return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); +} + +loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) +{ + struct nfs_server *server = NFS_SERVER(file_inode(filep)); + struct nfs4_exception exception = { }; + struct nfs_lock_context *lock; + loff_t err; + + lock = nfs_get_lock_context(nfs_file_open_context(filep)); + if (IS_ERR(lock)) + return PTR_ERR(lock); + + exception.inode = file_inode(filep); + exception.state = lock->open_context->state; + + do { + err = _nfs42_proc_llseek(filep, lock, offset, whence); + if (err >= 0) + break; + if (err == -ENOTSUPP) { + err = -EOPNOTSUPP; + break; + } + err = nfs4_handle_exception(server, err, &exception); + } while (exception.retry); + + nfs_put_lock_context(lock); + return err; +} + + +static void +nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata) +{ + struct nfs42_layoutstat_data *data = calldata; + struct inode *inode = data->inode; + struct nfs_server *server = NFS_SERVER(inode); + struct pnfs_layout_hdr *lo; + + spin_lock(&inode->i_lock); + lo = NFS_I(inode)->layout; + if (!pnfs_layout_is_valid(lo)) { + spin_unlock(&inode->i_lock); + rpc_exit(task, 0); + return; + } + nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid); + spin_unlock(&inode->i_lock); + nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, + &data->res.seq_res, task); +} + +static void +nfs42_layoutstat_done(struct rpc_task *task, void *calldata) +{ + struct nfs42_layoutstat_data *data = calldata; + struct inode *inode = data->inode; + struct pnfs_layout_hdr *lo; + + if (!nfs4_sequence_done(task, &data->res.seq_res)) + return; + + switch (task->tk_status) { + case 0: + return; + case -NFS4ERR_BADHANDLE: + case -ESTALE: + pnfs_destroy_layout(NFS_I(inode)); + break; + case -NFS4ERR_EXPIRED: + case -NFS4ERR_ADMIN_REVOKED: + case -NFS4ERR_DELEG_REVOKED: + case -NFS4ERR_STALE_STATEID: + case -NFS4ERR_BAD_STATEID: + spin_lock(&inode->i_lock); + lo = NFS_I(inode)->layout; + if (pnfs_layout_is_valid(lo) && + nfs4_stateid_match(&data->args.stateid, + &lo->plh_stateid)) { + LIST_HEAD(head); + + /* + * Mark the bad layout state as invalid, then retry + * with the current stateid. + */ + pnfs_mark_layout_stateid_invalid(lo, &head); + spin_unlock(&inode->i_lock); + pnfs_free_lseg_list(&head); + nfs_commit_inode(inode, 0); + } else + spin_unlock(&inode->i_lock); + break; + case -NFS4ERR_OLD_STATEID: + spin_lock(&inode->i_lock); + lo = NFS_I(inode)->layout; + if (pnfs_layout_is_valid(lo) && + nfs4_stateid_match_other(&data->args.stateid, + &lo->plh_stateid)) { + /* Do we need to delay before resending? */ + if (!nfs4_stateid_is_newer(&lo->plh_stateid, + &data->args.stateid)) + rpc_delay(task, HZ); + rpc_restart_call_prepare(task); + } + spin_unlock(&inode->i_lock); + break; + case -ENOTSUPP: + case -EOPNOTSUPP: + NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS; + } + + trace_nfs4_layoutstats(inode, &data->args.stateid, task->tk_status); +} + +static void +nfs42_layoutstat_release(void *calldata) +{ + struct nfs42_layoutstat_data *data = calldata; + struct nfs42_layoutstat_devinfo *devinfo = data->args.devinfo; + int i; + + for (i = 0; i < data->args.num_dev; i++) { + if (devinfo[i].ld_private.ops && devinfo[i].ld_private.ops->free) + devinfo[i].ld_private.ops->free(&devinfo[i].ld_private); + } + + pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout); + smp_mb__before_atomic(); + clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags); + smp_mb__after_atomic(); + nfs_iput_and_deactive(data->inode); + kfree(data->args.devinfo); + kfree(data); +} + +static const struct rpc_call_ops nfs42_layoutstat_ops = { + .rpc_call_prepare = nfs42_layoutstat_prepare, + .rpc_call_done = nfs42_layoutstat_done, + .rpc_release = nfs42_layoutstat_release, +}; + +int nfs42_proc_layoutstats_generic(struct nfs_server *server, + struct nfs42_layoutstat_data *data) +{ + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS], + .rpc_argp = &data->args, + .rpc_resp = &data->res, + }; + struct rpc_task_setup task_setup = { + .rpc_client = server->client, + .rpc_message = &msg, + .callback_ops = &nfs42_layoutstat_ops, + .callback_data = data, + .flags = RPC_TASK_ASYNC, + }; + struct rpc_task *task; + + data->inode = nfs_igrab_and_active(data->args.inode); + if (!data->inode) { + nfs42_layoutstat_release(data); + return -EAGAIN; + } + nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); + task = rpc_run_task(&task_setup); + if (IS_ERR(task)) + return PTR_ERR(task); + rpc_put_task(task); + return 0; +} + +static struct nfs42_layouterror_data * +nfs42_alloc_layouterror_data(struct pnfs_layout_segment *lseg, gfp_t gfp_flags) +{ + struct nfs42_layouterror_data *data; + struct inode *inode = lseg->pls_layout->plh_inode; + + data = kzalloc(sizeof(*data), gfp_flags); + if (data) { + data->args.inode = data->inode = nfs_igrab_and_active(inode); + if (data->inode) { + data->lseg = pnfs_get_lseg(lseg); + if (data->lseg) + return data; + nfs_iput_and_deactive(data->inode); + } + kfree(data); + } + return NULL; +} + +static void +nfs42_free_layouterror_data(struct nfs42_layouterror_data *data) +{ + pnfs_put_lseg(data->lseg); + nfs_iput_and_deactive(data->inode); + kfree(data); +} + +static void +nfs42_layouterror_prepare(struct rpc_task *task, void *calldata) +{ + struct nfs42_layouterror_data *data = calldata; + struct inode *inode = data->inode; + struct nfs_server *server = NFS_SERVER(inode); + struct pnfs_layout_hdr *lo = data->lseg->pls_layout; + unsigned i; + + spin_lock(&inode->i_lock); + if (!pnfs_layout_is_valid(lo)) { + spin_unlock(&inode->i_lock); + rpc_exit(task, 0); + return; + } + for (i = 0; i < data->args.num_errors; i++) + nfs4_stateid_copy(&data->args.errors[i].stateid, + &lo->plh_stateid); + spin_unlock(&inode->i_lock); + nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, + &data->res.seq_res, task); +} + +static void +nfs42_layouterror_done(struct rpc_task *task, void *calldata) +{ + struct nfs42_layouterror_data *data = calldata; + struct inode *inode = data->inode; + struct pnfs_layout_hdr *lo = data->lseg->pls_layout; + + if (!nfs4_sequence_done(task, &data->res.seq_res)) + return; + + switch (task->tk_status) { + case 0: + return; + case -NFS4ERR_BADHANDLE: + case -ESTALE: + pnfs_destroy_layout(NFS_I(inode)); + break; + case -NFS4ERR_EXPIRED: + case -NFS4ERR_ADMIN_REVOKED: + case -NFS4ERR_DELEG_REVOKED: + case -NFS4ERR_STALE_STATEID: + case -NFS4ERR_BAD_STATEID: + spin_lock(&inode->i_lock); + if (pnfs_layout_is_valid(lo) && + nfs4_stateid_match(&data->args.errors[0].stateid, + &lo->plh_stateid)) { + LIST_HEAD(head); + + /* + * Mark the bad layout state as invalid, then retry + * with the current stateid. + */ + pnfs_mark_layout_stateid_invalid(lo, &head); + spin_unlock(&inode->i_lock); + pnfs_free_lseg_list(&head); + nfs_commit_inode(inode, 0); + } else + spin_unlock(&inode->i_lock); + break; + case -NFS4ERR_OLD_STATEID: + spin_lock(&inode->i_lock); + if (pnfs_layout_is_valid(lo) && + nfs4_stateid_match_other(&data->args.errors[0].stateid, + &lo->plh_stateid)) { + /* Do we need to delay before resending? */ + if (!nfs4_stateid_is_newer(&lo->plh_stateid, + &data->args.errors[0].stateid)) + rpc_delay(task, HZ); + rpc_restart_call_prepare(task); + } + spin_unlock(&inode->i_lock); + break; + case -ENOTSUPP: + case -EOPNOTSUPP: + NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTERROR; + } + + trace_nfs4_layouterror(inode, &data->args.errors[0].stateid, + task->tk_status); +} + +static void +nfs42_layouterror_release(void *calldata) +{ + struct nfs42_layouterror_data *data = calldata; + + nfs42_free_layouterror_data(data); +} + +static const struct rpc_call_ops nfs42_layouterror_ops = { + .rpc_call_prepare = nfs42_layouterror_prepare, + .rpc_call_done = nfs42_layouterror_done, + .rpc_release = nfs42_layouterror_release, +}; + +int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg, + const struct nfs42_layout_error *errors, size_t n) +{ + struct inode *inode = lseg->pls_layout->plh_inode; + struct nfs42_layouterror_data *data; + struct rpc_task *task; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTERROR], + }; + struct rpc_task_setup task_setup = { + .rpc_message = &msg, + .callback_ops = &nfs42_layouterror_ops, + .flags = RPC_TASK_ASYNC, + }; + unsigned int i; + + if (!nfs_server_capable(inode, NFS_CAP_LAYOUTERROR)) + return -EOPNOTSUPP; + if (n > NFS42_LAYOUTERROR_MAX) + return -EINVAL; + data = nfs42_alloc_layouterror_data(lseg, nfs_io_gfp_mask()); + if (!data) + return -ENOMEM; + for (i = 0; i < n; i++) { + data->args.errors[i] = errors[i]; + data->args.num_errors++; + data->res.num_errors++; + } + msg.rpc_argp = &data->args; + msg.rpc_resp = &data->res; + task_setup.callback_data = data; + task_setup.rpc_client = NFS_SERVER(inode)->client; + nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); + task = rpc_run_task(&task_setup); + if (IS_ERR(task)) + return PTR_ERR(task); + rpc_put_task(task); + return 0; +} +EXPORT_SYMBOL_GPL(nfs42_proc_layouterror); + +static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f, + struct file *dst_f, struct nfs_lock_context *src_lock, + struct nfs_lock_context *dst_lock, loff_t src_offset, + loff_t dst_offset, loff_t count) +{ + struct inode *src_inode = file_inode(src_f); + struct inode *dst_inode = file_inode(dst_f); + struct nfs_server *server = NFS_SERVER(dst_inode); + __u32 dst_bitmask[NFS_BITMASK_SZ]; + struct nfs42_clone_args args = { + .src_fh = NFS_FH(src_inode), + .dst_fh = NFS_FH(dst_inode), + .src_offset = src_offset, + .dst_offset = dst_offset, + .count = count, + .dst_bitmask = dst_bitmask, + }; + struct nfs42_clone_res res = { + .server = server, + }; + int status; + + msg->rpc_argp = &args; + msg->rpc_resp = &res; + + status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context, + src_lock, FMODE_READ); + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; + return status; + } + status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context, + dst_lock, FMODE_WRITE); + if (status) { + if (status == -EAGAIN) + status = -NFS4ERR_BAD_STATEID; + return status; + } + + res.dst_fattr = nfs_alloc_fattr(); + if (!res.dst_fattr) + return -ENOMEM; + + nfs4_bitmask_set(dst_bitmask, server->cache_consistency_bitmask, + dst_inode, NFS_INO_INVALID_BLOCKS); + + status = nfs4_call_sync(server->client, server, msg, + &args.seq_args, &res.seq_res, 0); + trace_nfs4_clone(src_inode, dst_inode, &args, status); + if (status == 0) { + /* a zero-length count means clone to EOF in src */ + if (count == 0 && res.dst_fattr->valid & NFS_ATTR_FATTR_SIZE) + count = nfs_size_to_loff_t(res.dst_fattr->size) - dst_offset; + nfs42_copy_dest_done(dst_inode, dst_offset, count); + status = nfs_post_op_update_inode(dst_inode, res.dst_fattr); + } + + kfree(res.dst_fattr); + return status; +} + +int nfs42_proc_clone(struct file *src_f, struct file *dst_f, + loff_t src_offset, loff_t dst_offset, loff_t count) +{ + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE], + }; + struct inode *inode = file_inode(src_f); + struct nfs_server *server = NFS_SERVER(file_inode(src_f)); + struct nfs_lock_context *src_lock; + struct nfs_lock_context *dst_lock; + struct nfs4_exception src_exception = { }; + struct nfs4_exception dst_exception = { }; + int err, err2; + + if (!nfs_server_capable(inode, NFS_CAP_CLONE)) + return -EOPNOTSUPP; + + src_lock = nfs_get_lock_context(nfs_file_open_context(src_f)); + if (IS_ERR(src_lock)) + return PTR_ERR(src_lock); + + src_exception.inode = file_inode(src_f); + src_exception.state = src_lock->open_context->state; + + dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f)); + if (IS_ERR(dst_lock)) { + err = PTR_ERR(dst_lock); + goto out_put_src_lock; + } + + dst_exception.inode = file_inode(dst_f); + dst_exception.state = dst_lock->open_context->state; + + do { + err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock, + src_offset, dst_offset, count); + if (err == -ENOTSUPP || err == -EOPNOTSUPP) { + NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE; + err = -EOPNOTSUPP; + break; + } + + err2 = nfs4_handle_exception(server, err, &src_exception); + err = nfs4_handle_exception(server, err, &dst_exception); + if (!err) + err = err2; + } while (src_exception.retry || dst_exception.retry); + + nfs_put_lock_context(dst_lock); +out_put_src_lock: + nfs_put_lock_context(src_lock); + return err; +} + +#define NFS4XATTR_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) + +static int _nfs42_proc_removexattr(struct inode *inode, const char *name) +{ + struct nfs_server *server = NFS_SERVER(inode); + struct nfs42_removexattrargs args = { + .fh = NFS_FH(inode), + .xattr_name = name, + }; + struct nfs42_removexattrres res; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVEXATTR], + .rpc_argp = &args, + .rpc_resp = &res, + }; + int ret; + unsigned long timestamp = jiffies; + + ret = nfs4_call_sync(server->client, server, &msg, &args.seq_args, + &res.seq_res, 1); + trace_nfs4_removexattr(inode, name, ret); + if (!ret) + nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0); + + return ret; +} + +static int _nfs42_proc_setxattr(struct inode *inode, const char *name, + const void *buf, size_t buflen, int flags) +{ + struct nfs_server *server = NFS_SERVER(inode); + struct page *pages[NFS4XATTR_MAXPAGES]; + struct nfs42_setxattrargs arg = { + .fh = NFS_FH(inode), + .xattr_pages = pages, + .xattr_len = buflen, + .xattr_name = name, + .xattr_flags = flags, + }; + struct nfs42_setxattrres res; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETXATTR], + .rpc_argp = &arg, + .rpc_resp = &res, + }; + int ret, np; + unsigned long timestamp = jiffies; + + if (buflen > server->sxasize) + return -ERANGE; + + if (buflen > 0) { + np = nfs4_buf_to_pages_noslab(buf, buflen, arg.xattr_pages); + if (np < 0) + return np; + } else + np = 0; + + ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, + &res.seq_res, 1); + trace_nfs4_setxattr(inode, name, ret); + + for (; np > 0; np--) + put_page(pages[np - 1]); + + if (!ret) + nfs4_update_changeattr(inode, &res.cinfo, timestamp, 0); + + return ret; +} + +static ssize_t _nfs42_proc_getxattr(struct inode *inode, const char *name, + void *buf, size_t buflen, struct page **pages, + size_t plen) +{ + struct nfs_server *server = NFS_SERVER(inode); + struct nfs42_getxattrargs arg = { + .fh = NFS_FH(inode), + .xattr_name = name, + }; + struct nfs42_getxattrres res; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETXATTR], + .rpc_argp = &arg, + .rpc_resp = &res, + }; + ssize_t ret; + + arg.xattr_len = plen; + arg.xattr_pages = pages; + + ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, + &res.seq_res, 0); + trace_nfs4_getxattr(inode, name, ret); + if (ret < 0) + return ret; + + /* + * Normally, the caching is done one layer up, but for successful + * RPCS, always cache the result here, even if the caller was + * just querying the length, or if the reply was too big for + * the caller. This avoids a second RPC in the case of the + * common query-alloc-retrieve cycle for xattrs. + * + * Note that xattr_len is always capped to XATTR_SIZE_MAX. + */ + + nfs4_xattr_cache_add(inode, name, NULL, pages, res.xattr_len); + + if (buflen) { + if (res.xattr_len > buflen) + return -ERANGE; + _copy_from_pages(buf, pages, 0, res.xattr_len); + } + + return res.xattr_len; +} + +static ssize_t _nfs42_proc_listxattrs(struct inode *inode, void *buf, + size_t buflen, u64 *cookiep, bool *eofp) +{ + struct nfs_server *server = NFS_SERVER(inode); + struct page **pages; + struct nfs42_listxattrsargs arg = { + .fh = NFS_FH(inode), + .cookie = *cookiep, + }; + struct nfs42_listxattrsres res = { + .eof = false, + .xattr_buf = buf, + .xattr_len = buflen, + }; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LISTXATTRS], + .rpc_argp = &arg, + .rpc_resp = &res, + }; + u32 xdrlen; + int ret, np, i; + + + ret = -ENOMEM; + res.scratch = alloc_page(GFP_KERNEL); + if (!res.scratch) + goto out; + + xdrlen = nfs42_listxattr_xdrsize(buflen); + if (xdrlen > server->lxasize) + xdrlen = server->lxasize; + np = xdrlen / PAGE_SIZE + 1; + + pages = kcalloc(np, sizeof(struct page *), GFP_KERNEL); + if (!pages) + goto out_free_scratch; + for (i = 0; i < np; i++) { + pages[i] = alloc_page(GFP_KERNEL); + if (!pages[i]) + goto out_free_pages; + } + + arg.xattr_pages = pages; + arg.count = xdrlen; + + ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, + &res.seq_res, 0); + trace_nfs4_listxattr(inode, ret); + + if (ret >= 0) { + ret = res.copied; + *cookiep = res.cookie; + *eofp = res.eof; + } + +out_free_pages: + while (--np >= 0) { + if (pages[np]) + __free_page(pages[np]); + } + kfree(pages); +out_free_scratch: + __free_page(res.scratch); +out: + return ret; + +} + +ssize_t nfs42_proc_getxattr(struct inode *inode, const char *name, + void *buf, size_t buflen) +{ + struct nfs4_exception exception = { }; + ssize_t err, np, i; + struct page **pages; + + np = nfs_page_array_len(0, buflen ?: XATTR_SIZE_MAX); + pages = kmalloc_array(np, sizeof(*pages), GFP_KERNEL); + if (!pages) + return -ENOMEM; + + for (i = 0; i < np; i++) { + pages[i] = alloc_page(GFP_KERNEL); + if (!pages[i]) { + err = -ENOMEM; + goto out; + } + } + + /* + * The GETXATTR op has no length field in the call, and the + * xattr data is at the end of the reply. + * + * There is no downside in using the page-aligned length. It will + * allow receiving and caching xattrs that are too large for the + * caller but still fit in the page-rounded value. + */ + do { + err = _nfs42_proc_getxattr(inode, name, buf, buflen, + pages, np * PAGE_SIZE); + if (err >= 0) + break; + err = nfs4_handle_exception(NFS_SERVER(inode), err, + &exception); + } while (exception.retry); + +out: + while (--i >= 0) + __free_page(pages[i]); + kfree(pages); + + return err; +} + +int nfs42_proc_setxattr(struct inode *inode, const char *name, + const void *buf, size_t buflen, int flags) +{ + struct nfs4_exception exception = { }; + int err; + + do { + err = _nfs42_proc_setxattr(inode, name, buf, buflen, flags); + if (!err) + break; + err = nfs4_handle_exception(NFS_SERVER(inode), err, + &exception); + } while (exception.retry); + + return err; +} + +ssize_t nfs42_proc_listxattrs(struct inode *inode, void *buf, + size_t buflen, u64 *cookiep, bool *eofp) +{ + struct nfs4_exception exception = { }; + ssize_t err; + + do { + err = _nfs42_proc_listxattrs(inode, buf, buflen, + cookiep, eofp); + if (err >= 0) + break; + err = nfs4_handle_exception(NFS_SERVER(inode), err, + &exception); + } while (exception.retry); + + return err; +} + +int nfs42_proc_removexattr(struct inode *inode, const char *name) +{ + struct nfs4_exception exception = { }; + int err; + + do { + err = _nfs42_proc_removexattr(inode, name); + if (!err) + break; + err = nfs4_handle_exception(NFS_SERVER(inode), err, + &exception); + } while (exception.retry); + + return err; +} |