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1/*
2 * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com>
3 */
4#include <linux/fs.h>
5#include <linux/sunrpc/sched.h>
6#include <linux/nfs.h>
7#include <linux/nfs3.h>
8#include <linux/nfs4.h>
9#include <linux/nfs_xdr.h>
10#include <linux/nfs_fs.h>
11#include "nfs4_fs.h"
12#include "nfs42.h"
13#include "iostat.h"
14#include "pnfs.h"
15#include "internal.h"
16
17#define NFSDBG_FACILITY NFSDBG_PROC
18
19static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
20 struct nfs_lock_context *lock, loff_t offset, loff_t len)
21{
22 struct inode *inode = file_inode(filep);
23 struct nfs_server *server = NFS_SERVER(inode);
24 struct nfs42_falloc_args args = {
25 .falloc_fh = NFS_FH(inode),
26 .falloc_offset = offset,
27 .falloc_length = len,
28 .falloc_bitmask = server->cache_consistency_bitmask,
29 };
30 struct nfs42_falloc_res res = {
31 .falloc_server = server,
32 };
33 int status;
34
35 msg->rpc_argp = &args;
36 msg->rpc_resp = &res;
37
38 status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
39 lock, FMODE_WRITE);
40 if (status)
41 return status;
42
43 res.falloc_fattr = nfs_alloc_fattr();
44 if (!res.falloc_fattr)
45 return -ENOMEM;
46
47 status = nfs4_call_sync(server->client, server, msg,
48 &args.seq_args, &res.seq_res, 0);
49 if (status == 0)
50 status = nfs_post_op_update_inode(inode, res.falloc_fattr);
51
52 kfree(res.falloc_fattr);
53 return status;
54}
55
56static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
57 loff_t offset, loff_t len)
58{
59 struct nfs_server *server = NFS_SERVER(file_inode(filep));
60 struct nfs4_exception exception = { };
61 struct nfs_lock_context *lock;
62 int err;
63
64 lock = nfs_get_lock_context(nfs_file_open_context(filep));
65 if (IS_ERR(lock))
66 return PTR_ERR(lock);
67
68 exception.inode = file_inode(filep);
69 exception.state = lock->open_context->state;
70
71 do {
72 err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
73 if (err == -ENOTSUPP) {
74 err = -EOPNOTSUPP;
75 break;
76 }
77 err = nfs4_handle_exception(server, err, &exception);
78 } while (exception.retry);
79
80 nfs_put_lock_context(lock);
81 return err;
82}
83
84int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
85{
86 struct rpc_message msg = {
87 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
88 };
89 struct inode *inode = file_inode(filep);
90 int err;
91
92 if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
93 return -EOPNOTSUPP;
94
95 inode_lock(inode);
96
97 err = nfs42_proc_fallocate(&msg, filep, offset, len);
98 if (err == -EOPNOTSUPP)
99 NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
100
101 inode_unlock(inode);
102 return err;
103}
104
105int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
106{
107 struct rpc_message msg = {
108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
109 };
110 struct inode *inode = file_inode(filep);
111 int err;
112
113 if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
114 return -EOPNOTSUPP;
115
116 nfs_wb_all(inode);
117 inode_lock(inode);
118
119 err = nfs42_proc_fallocate(&msg, filep, offset, len);
120 if (err == 0)
121 truncate_pagecache_range(inode, offset, (offset + len) -1);
122 if (err == -EOPNOTSUPP)
123 NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
124
125 inode_unlock(inode);
126 return err;
127}
128
129static loff_t _nfs42_proc_llseek(struct file *filep,
130 struct nfs_lock_context *lock, loff_t offset, int whence)
131{
132 struct inode *inode = file_inode(filep);
133 struct nfs42_seek_args args = {
134 .sa_fh = NFS_FH(inode),
135 .sa_offset = offset,
136 .sa_what = (whence == SEEK_HOLE) ?
137 NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
138 };
139 struct nfs42_seek_res res;
140 struct rpc_message msg = {
141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
142 .rpc_argp = &args,
143 .rpc_resp = &res,
144 };
145 struct nfs_server *server = NFS_SERVER(inode);
146 int status;
147
148 if (!nfs_server_capable(inode, NFS_CAP_SEEK))
149 return -ENOTSUPP;
150
151 status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
152 lock, FMODE_READ);
153 if (status)
154 return status;
155
156 nfs_wb_all(inode);
157 status = nfs4_call_sync(server->client, server, &msg,
158 &args.seq_args, &res.seq_res, 0);
159 if (status == -ENOTSUPP)
160 server->caps &= ~NFS_CAP_SEEK;
161 if (status)
162 return status;
163
164 return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
165}
166
167loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
168{
169 struct nfs_server *server = NFS_SERVER(file_inode(filep));
170 struct nfs4_exception exception = { };
171 struct nfs_lock_context *lock;
172 loff_t err;
173
174 lock = nfs_get_lock_context(nfs_file_open_context(filep));
175 if (IS_ERR(lock))
176 return PTR_ERR(lock);
177
178 exception.inode = file_inode(filep);
179 exception.state = lock->open_context->state;
180
181 do {
182 err = _nfs42_proc_llseek(filep, lock, offset, whence);
183 if (err >= 0)
184 break;
185 if (err == -ENOTSUPP) {
186 err = -EOPNOTSUPP;
187 break;
188 }
189 err = nfs4_handle_exception(server, err, &exception);
190 } while (exception.retry);
191
192 nfs_put_lock_context(lock);
193 return err;
194}
195
196
197static void
198nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
199{
200 struct nfs42_layoutstat_data *data = calldata;
201 struct nfs_server *server = NFS_SERVER(data->args.inode);
202
203 nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args,
204 &data->res.seq_res, task);
205}
206
207static void
208nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
209{
210 struct nfs42_layoutstat_data *data = calldata;
211 struct inode *inode = data->inode;
212 struct pnfs_layout_hdr *lo;
213
214 if (!nfs4_sequence_done(task, &data->res.seq_res))
215 return;
216
217 switch (task->tk_status) {
218 case 0:
219 break;
220 case -NFS4ERR_EXPIRED:
221 case -NFS4ERR_STALE_STATEID:
222 case -NFS4ERR_OLD_STATEID:
223 case -NFS4ERR_BAD_STATEID:
224 spin_lock(&inode->i_lock);
225 lo = NFS_I(inode)->layout;
226 if (lo && nfs4_stateid_match(&data->args.stateid,
227 &lo->plh_stateid)) {
228 LIST_HEAD(head);
229
230 /*
231 * Mark the bad layout state as invalid, then retry
232 * with the current stateid.
233 */
234 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
235 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
236 spin_unlock(&inode->i_lock);
237 pnfs_free_lseg_list(&head);
238 } else
239 spin_unlock(&inode->i_lock);
240 break;
241 case -ENOTSUPP:
242 case -EOPNOTSUPP:
243 NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
244 default:
245 break;
246 }
247
248 dprintk("%s server returns %d\n", __func__, task->tk_status);
249}
250
251static void
252nfs42_layoutstat_release(void *calldata)
253{
254 struct nfs42_layoutstat_data *data = calldata;
255 struct nfs_server *nfss = NFS_SERVER(data->args.inode);
256
257 if (nfss->pnfs_curr_ld->cleanup_layoutstats)
258 nfss->pnfs_curr_ld->cleanup_layoutstats(data);
259
260 pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
261 smp_mb__before_atomic();
262 clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
263 smp_mb__after_atomic();
264 nfs_iput_and_deactive(data->inode);
265 kfree(data->args.devinfo);
266 kfree(data);
267}
268
269static const struct rpc_call_ops nfs42_layoutstat_ops = {
270 .rpc_call_prepare = nfs42_layoutstat_prepare,
271 .rpc_call_done = nfs42_layoutstat_done,
272 .rpc_release = nfs42_layoutstat_release,
273};
274
275int nfs42_proc_layoutstats_generic(struct nfs_server *server,
276 struct nfs42_layoutstat_data *data)
277{
278 struct rpc_message msg = {
279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
280 .rpc_argp = &data->args,
281 .rpc_resp = &data->res,
282 };
283 struct rpc_task_setup task_setup = {
284 .rpc_client = server->client,
285 .rpc_message = &msg,
286 .callback_ops = &nfs42_layoutstat_ops,
287 .callback_data = data,
288 .flags = RPC_TASK_ASYNC,
289 };
290 struct rpc_task *task;
291
292 data->inode = nfs_igrab_and_active(data->args.inode);
293 if (!data->inode) {
294 nfs42_layoutstat_release(data);
295 return -EAGAIN;
296 }
297 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
298 task = rpc_run_task(&task_setup);
299 if (IS_ERR(task))
300 return PTR_ERR(task);
301 return 0;
302}
303
304static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
305 struct file *dst_f, struct nfs_lock_context *src_lock,
306 struct nfs_lock_context *dst_lock, loff_t src_offset,
307 loff_t dst_offset, loff_t count)
308{
309 struct inode *src_inode = file_inode(src_f);
310 struct inode *dst_inode = file_inode(dst_f);
311 struct nfs_server *server = NFS_SERVER(dst_inode);
312 struct nfs42_clone_args args = {
313 .src_fh = NFS_FH(src_inode),
314 .dst_fh = NFS_FH(dst_inode),
315 .src_offset = src_offset,
316 .dst_offset = dst_offset,
317 .count = count,
318 .dst_bitmask = server->cache_consistency_bitmask,
319 };
320 struct nfs42_clone_res res = {
321 .server = server,
322 };
323 int status;
324
325 msg->rpc_argp = &args;
326 msg->rpc_resp = &res;
327
328 status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
329 src_lock, FMODE_READ);
330 if (status)
331 return status;
332
333 status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
334 dst_lock, FMODE_WRITE);
335 if (status)
336 return status;
337
338 res.dst_fattr = nfs_alloc_fattr();
339 if (!res.dst_fattr)
340 return -ENOMEM;
341
342 status = nfs4_call_sync(server->client, server, msg,
343 &args.seq_args, &res.seq_res, 0);
344 if (status == 0)
345 status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
346
347 kfree(res.dst_fattr);
348 return status;
349}
350
351int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
352 loff_t src_offset, loff_t dst_offset, loff_t count)
353{
354 struct rpc_message msg = {
355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
356 };
357 struct inode *inode = file_inode(src_f);
358 struct nfs_server *server = NFS_SERVER(file_inode(src_f));
359 struct nfs_lock_context *src_lock;
360 struct nfs_lock_context *dst_lock;
361 struct nfs4_exception src_exception = { };
362 struct nfs4_exception dst_exception = { };
363 int err, err2;
364
365 if (!nfs_server_capable(inode, NFS_CAP_CLONE))
366 return -EOPNOTSUPP;
367
368 src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
369 if (IS_ERR(src_lock))
370 return PTR_ERR(src_lock);
371
372 src_exception.inode = file_inode(src_f);
373 src_exception.state = src_lock->open_context->state;
374
375 dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
376 if (IS_ERR(dst_lock)) {
377 err = PTR_ERR(dst_lock);
378 goto out_put_src_lock;
379 }
380
381 dst_exception.inode = file_inode(dst_f);
382 dst_exception.state = dst_lock->open_context->state;
383
384 do {
385 err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
386 src_offset, dst_offset, count);
387 if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
388 NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
389 err = -EOPNOTSUPP;
390 break;
391 }
392
393 err2 = nfs4_handle_exception(server, err, &src_exception);
394 err = nfs4_handle_exception(server, err, &dst_exception);
395 if (!err)
396 err = err2;
397 } while (src_exception.retry || dst_exception.retry);
398
399 nfs_put_lock_context(dst_lock);
400out_put_src_lock:
401 nfs_put_lock_context(src_lock);
402 return err;
403}