nfs3proc.c 21.0 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
/*
 *  linux/fs/nfs/nfs3proc.c
 *
 *  Client-side NFSv3 procedures stubs.
 *
 *  Copyright (C) 1997, Olaf Kirch
 */

#include <linux/mm.h>
#include <linux/utsname.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/sunrpc/clnt.h>
#include <linux/nfs.h>
#include <linux/nfs3.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include <linux/lockd/bind.h>
19
#include <linux/nfs_mount.h>
L
Linus Torvalds 已提交
20

21
#include "iostat.h"
D
David Howells 已提交
22
#include "internal.h"
23

L
Linus Torvalds 已提交
24 25 26 27 28 29 30 31 32 33 34
#define NFSDBG_FACILITY		NFSDBG_PROC

/* A wrapper to handle the EJUKEBOX error message */
static int
nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
{
	int res;
	do {
		res = rpc_call_sync(clnt, msg, flags);
		if (res != -EJUKEBOX)
			break;
35
		schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
L
Linus Torvalds 已提交
36
		res = -ERESTARTSYS;
37
	} while (!fatal_signal_pending(current));
L
Linus Torvalds 已提交
38 39 40
	return res;
}

C
Chuck Lever 已提交
41
#define rpc_call_sync(clnt, msg, flags)	nfs3_rpc_wrapper(clnt, msg, flags)
L
Linus Torvalds 已提交
42 43

static int
44
nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
L
Linus Torvalds 已提交
45 46 47
{
	if (task->tk_status != -EJUKEBOX)
		return 0;
48
	nfs_inc_stats(inode, NFSIOS_DELAY);
L
Linus Torvalds 已提交
49 50 51 52 53 54 55
	task->tk_status = 0;
	rpc_restart_call(task);
	rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
	return 1;
}

static int
56 57
do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
		 struct nfs_fsinfo *info)
L
Linus Torvalds 已提交
58
{
C
Chuck Lever 已提交
59 60 61 62 63
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_FSINFO],
		.rpc_argp	= fhandle,
		.rpc_resp	= info,
	};
L
Linus Torvalds 已提交
64 65
	int	status;

66
	dprintk("%s: call  fsinfo\n", __func__);
67
	nfs_fattr_init(info->fattr);
C
Chuck Lever 已提交
68
	status = rpc_call_sync(client, &msg, 0);
69
	dprintk("%s: reply fsinfo: %d\n", __func__, status);
L
Linus Torvalds 已提交
70
	if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
C
Chuck Lever 已提交
71 72 73
		msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
		msg.rpc_resp = info->fattr;
		status = rpc_call_sync(client, &msg, 0);
74
		dprintk("%s: reply getattr: %d\n", __func__, status);
L
Linus Torvalds 已提交
75 76 77 78
	}
	return status;
}

79
/*
80
 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
81 82 83 84 85 86 87 88
 */
static int
nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
		   struct nfs_fsinfo *info)
{
	int	status;

	status = do_proc_get_root(server->client, fhandle, info);
89 90
	if (status && server->nfs_client->cl_rpcclient != server->client)
		status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
91 92 93
	return status;
}

L
Linus Torvalds 已提交
94 95 96 97 98 99 100
/*
 * One function for each procedure in the NFS protocol.
 */
static int
nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
		struct nfs_fattr *fattr)
{
C
Chuck Lever 已提交
101 102 103 104 105
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_GETATTR],
		.rpc_argp	= fhandle,
		.rpc_resp	= fattr,
	};
L
Linus Torvalds 已提交
106 107 108
	int	status;

	dprintk("NFS call  getattr\n");
109
	nfs_fattr_init(fattr);
C
Chuck Lever 已提交
110
	status = rpc_call_sync(server->client, &msg, 0);
L
Linus Torvalds 已提交
111 112 113 114 115 116 117 118 119 120 121 122 123
	dprintk("NFS reply getattr: %d\n", status);
	return status;
}

static int
nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
			struct iattr *sattr)
{
	struct inode *inode = dentry->d_inode;
	struct nfs3_sattrargs	arg = {
		.fh		= NFS_FH(inode),
		.sattr		= sattr,
	};
C
Chuck Lever 已提交
124 125 126 127 128
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_SETATTR],
		.rpc_argp	= &arg,
		.rpc_resp	= fattr,
	};
L
Linus Torvalds 已提交
129 130 131
	int	status;

	dprintk("NFS call  setattr\n");
132 133
	if (sattr->ia_valid & ATTR_FILE)
		msg.rpc_cred = nfs_file_cred(sattr->ia_file);
134
	nfs_fattr_init(fattr);
C
Chuck Lever 已提交
135
	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
136 137
	if (status == 0)
		nfs_setattr_update_inode(inode, sattr);
L
Linus Torvalds 已提交
138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156
	dprintk("NFS reply setattr: %d\n", status);
	return status;
}

static int
nfs3_proc_lookup(struct inode *dir, struct qstr *name,
		 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
	struct nfs_fattr	dir_attr;
	struct nfs3_diropargs	arg = {
		.fh		= NFS_FH(dir),
		.name		= name->name,
		.len		= name->len
	};
	struct nfs3_diropres	res = {
		.dir_attr	= &dir_attr,
		.fh		= fhandle,
		.fattr		= fattr
	};
C
Chuck Lever 已提交
157 158 159 160 161
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_LOOKUP],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
	};
L
Linus Torvalds 已提交
162 163 164
	int			status;

	dprintk("NFS call  lookup %s\n", name->name);
165 166
	nfs_fattr_init(&dir_attr);
	nfs_fattr_init(fattr);
C
Chuck Lever 已提交
167
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
168
	nfs_refresh_inode(dir, &dir_attr);
C
Chuck Lever 已提交
169 170 171 172 173 174
	if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
		msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
		msg.rpc_argp = fhandle;
		msg.rpc_resp = fattr;
		status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	}
L
Linus Torvalds 已提交
175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191
	dprintk("NFS reply lookup: %d\n", status);
	return status;
}

static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
{
	struct nfs_fattr	fattr;
	struct nfs3_accessargs	arg = {
		.fh		= NFS_FH(inode),
	};
	struct nfs3_accessres	res = {
		.fattr		= &fattr,
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_ACCESS],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
C
Chuck Lever 已提交
192
		.rpc_cred	= entry->cred,
L
Linus Torvalds 已提交
193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211
	};
	int mode = entry->mask;
	int status;

	dprintk("NFS call  access\n");

	if (mode & MAY_READ)
		arg.access |= NFS3_ACCESS_READ;
	if (S_ISDIR(inode->i_mode)) {
		if (mode & MAY_WRITE)
			arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
		if (mode & MAY_EXEC)
			arg.access |= NFS3_ACCESS_LOOKUP;
	} else {
		if (mode & MAY_WRITE)
			arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
		if (mode & MAY_EXEC)
			arg.access |= NFS3_ACCESS_EXECUTE;
	}
212
	nfs_fattr_init(&fattr);
L
Linus Torvalds 已提交
213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237
	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
	nfs_refresh_inode(inode, &fattr);
	if (status == 0) {
		entry->mask = 0;
		if (res.access & NFS3_ACCESS_READ)
			entry->mask |= MAY_READ;
		if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
			entry->mask |= MAY_WRITE;
		if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
			entry->mask |= MAY_EXEC;
	}
	dprintk("NFS reply access: %d\n", status);
	return status;
}

static int nfs3_proc_readlink(struct inode *inode, struct page *page,
		unsigned int pgbase, unsigned int pglen)
{
	struct nfs_fattr	fattr;
	struct nfs3_readlinkargs args = {
		.fh		= NFS_FH(inode),
		.pgbase		= pgbase,
		.pglen		= pglen,
		.pages		= &page
	};
C
Chuck Lever 已提交
238 239 240 241 242
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_READLINK],
		.rpc_argp	= &args,
		.rpc_resp	= &fattr,
	};
L
Linus Torvalds 已提交
243 244 245
	int			status;

	dprintk("NFS call  readlink\n");
246
	nfs_fattr_init(&fattr);
C
Chuck Lever 已提交
247
	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
L
Linus Torvalds 已提交
248 249 250 251 252
	nfs_refresh_inode(inode, &fattr);
	dprintk("NFS reply readlink: %d\n", status);
	return status;
}

253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299
struct nfs3_createdata {
	struct rpc_message msg;
	union {
		struct nfs3_createargs create;
		struct nfs3_mkdirargs mkdir;
		struct nfs3_symlinkargs symlink;
		struct nfs3_mknodargs mknod;
	} arg;
	struct nfs3_diropres res;
	struct nfs_fh fh;
	struct nfs_fattr fattr;
	struct nfs_fattr dir_attr;
};

static struct nfs3_createdata *nfs3_alloc_createdata(void)
{
	struct nfs3_createdata *data;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (data != NULL) {
		data->msg.rpc_argp = &data->arg;
		data->msg.rpc_resp = &data->res;
		data->res.fh = &data->fh;
		data->res.fattr = &data->fattr;
		data->res.dir_attr = &data->dir_attr;
		nfs_fattr_init(data->res.fattr);
		nfs_fattr_init(data->res.dir_attr);
	}
	return data;
}

static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
{
	int status;

	status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
	nfs_post_op_update_inode(dir, data->res.dir_attr);
	if (status == 0)
		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
	return status;
}

static void nfs3_free_createdata(struct nfs3_createdata *data)
{
	kfree(data);
}

L
Linus Torvalds 已提交
300 301 302 303 304 305
/*
 * Create a regular file.
 * For now, we don't implement O_EXCL.
 */
static int
nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
306
		 int flags, struct nameidata *nd)
L
Linus Torvalds 已提交
307
{
308
	struct nfs3_createdata *data;
309
	mode_t mode = sattr->ia_mode;
310
	int status = -ENOMEM;
L
Linus Torvalds 已提交
311 312

	dprintk("NFS call  create %s\n", dentry->d_name.name);
313 314 315 316 317 318 319 320 321 322 323 324

	data = nfs3_alloc_createdata();
	if (data == NULL)
		goto out;

	data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
	data->arg.create.fh = NFS_FH(dir);
	data->arg.create.name = dentry->d_name.name;
	data->arg.create.len = dentry->d_name.len;
	data->arg.create.sattr = sattr;

	data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
L
Linus Torvalds 已提交
325
	if (flags & O_EXCL) {
326 327 328
		data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
		data->arg.create.verifier[0] = jiffies;
		data->arg.create.verifier[1] = current->pid;
L
Linus Torvalds 已提交
329 330
	}

331 332
	sattr->ia_mode &= ~current->fs->umask;

333 334
	for (;;) {
		status = nfs3_do_create(dir, dentry, data);
L
Linus Torvalds 已提交
335

336 337 338 339 340
		if (status != -ENOTSUPP)
			break;
		/* If the server doesn't support the exclusive creation
		 * semantics, try again with simple 'guarded' mode. */
		switch (data->arg.create.createmode) {
L
Linus Torvalds 已提交
341
			case NFS3_CREATE_EXCLUSIVE:
342
				data->arg.create.createmode = NFS3_CREATE_GUARDED;
L
Linus Torvalds 已提交
343 344 345
				break;

			case NFS3_CREATE_GUARDED:
346
				data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
L
Linus Torvalds 已提交
347 348 349 350 351
				break;

			case NFS3_CREATE_UNCHECKED:
				goto out;
		}
352 353
		nfs_fattr_init(data->res.dir_attr);
		nfs_fattr_init(data->res.fattr);
L
Linus Torvalds 已提交
354 355 356 357 358 359 360
	}

	if (status != 0)
		goto out;

	/* When we created the file with exclusive semantics, make
	 * sure we set the attributes afterwards. */
361
	if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
L
Linus Torvalds 已提交
362 363 364 365 366 367 368 369 370 371
		dprintk("NFS call  setattr (post-create)\n");

		if (!(sattr->ia_valid & ATTR_ATIME_SET))
			sattr->ia_valid |= ATTR_ATIME;
		if (!(sattr->ia_valid & ATTR_MTIME_SET))
			sattr->ia_valid |= ATTR_MTIME;

		/* Note: we could use a guarded setattr here, but I'm
		 * not sure this buys us anything (and I'd have
		 * to revamp the NFSv3 XDR code) */
372 373
		status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
		nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
L
Linus Torvalds 已提交
374
		dprintk("NFS reply setattr (post-create): %d\n", status);
375 376
		if (status != 0)
			goto out;
L
Linus Torvalds 已提交
377
	}
378
	status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
L
Linus Torvalds 已提交
379
out:
380
	nfs3_free_createdata(data);
L
Linus Torvalds 已提交
381 382 383 384 385 386 387
	dprintk("NFS reply create: %d\n", status);
	return status;
}

static int
nfs3_proc_remove(struct inode *dir, struct qstr *name)
{
388 389 390 391
	struct nfs_removeargs arg = {
		.fh = NFS_FH(dir),
		.name.len = name->len,
		.name.name = name->name,
L
Linus Torvalds 已提交
392
	};
393 394 395 396 397
	struct nfs_removeres res;
	struct rpc_message msg = {
		.rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
		.rpc_argp = &arg,
		.rpc_resp = &res,
L
Linus Torvalds 已提交
398 399 400 401
	};
	int			status;

	dprintk("NFS call  remove %s\n", name->name);
402
	nfs_fattr_init(&res.dir_attr);
L
Linus Torvalds 已提交
403
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
404
	nfs_post_op_update_inode(dir, &res.dir_attr);
L
Linus Torvalds 已提交
405 406 407 408
	dprintk("NFS reply remove: %d\n", status);
	return status;
}

409 410
static void
nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
L
Linus Torvalds 已提交
411 412 413 414 415
{
	msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
}

static int
416
nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
L
Linus Torvalds 已提交
417
{
418 419 420 421 422 423
	struct nfs_removeres *res;
	if (nfs3_async_handle_jukebox(task, dir))
		return 0;
	res = task->tk_msg.rpc_resp;
	nfs_post_op_update_inode(dir, &res->dir_attr);
	return 1;
L
Linus Torvalds 已提交
424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442
}

static int
nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
		 struct inode *new_dir, struct qstr *new_name)
{
	struct nfs_fattr	old_dir_attr, new_dir_attr;
	struct nfs3_renameargs	arg = {
		.fromfh		= NFS_FH(old_dir),
		.fromname	= old_name->name,
		.fromlen	= old_name->len,
		.tofh		= NFS_FH(new_dir),
		.toname		= new_name->name,
		.tolen		= new_name->len
	};
	struct nfs3_renameres	res = {
		.fromattr	= &old_dir_attr,
		.toattr		= &new_dir_attr
	};
C
Chuck Lever 已提交
443 444 445 446 447
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_RENAME],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
	};
L
Linus Torvalds 已提交
448 449 450
	int			status;

	dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
451 452
	nfs_fattr_init(&old_dir_attr);
	nfs_fattr_init(&new_dir_attr);
C
Chuck Lever 已提交
453
	status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
454 455
	nfs_post_op_update_inode(old_dir, &old_dir_attr);
	nfs_post_op_update_inode(new_dir, &new_dir_attr);
L
Linus Torvalds 已提交
456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473
	dprintk("NFS reply rename: %d\n", status);
	return status;
}

static int
nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
	struct nfs_fattr	dir_attr, fattr;
	struct nfs3_linkargs	arg = {
		.fromfh		= NFS_FH(inode),
		.tofh		= NFS_FH(dir),
		.toname		= name->name,
		.tolen		= name->len
	};
	struct nfs3_linkres	res = {
		.dir_attr	= &dir_attr,
		.fattr		= &fattr
	};
C
Chuck Lever 已提交
474 475 476 477 478
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_LINK],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
	};
L
Linus Torvalds 已提交
479 480 481
	int			status;

	dprintk("NFS call  link %s\n", name->name);
482 483
	nfs_fattr_init(&dir_attr);
	nfs_fattr_init(&fattr);
C
Chuck Lever 已提交
484
	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
485 486
	nfs_post_op_update_inode(dir, &dir_attr);
	nfs_post_op_update_inode(inode, &fattr);
L
Linus Torvalds 已提交
487 488 489 490 491
	dprintk("NFS reply link: %d\n", status);
	return status;
}

static int
492 493
nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
		  unsigned int len, struct iattr *sattr)
L
Linus Torvalds 已提交
494
{
495 496
	struct nfs3_createdata *data;
	int status = -ENOMEM;
L
Linus Torvalds 已提交
497

498
	if (len > NFS3_MAXPATHLEN)
L
Linus Torvalds 已提交
499
		return -ENAMETOOLONG;
500

501 502
	dprintk("NFS call  symlink %s\n", dentry->d_name.name);

503 504
	data = nfs3_alloc_createdata();
	if (data == NULL)
505
		goto out;
506 507 508 509 510 511 512 513 514 515 516
	data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
	data->arg.symlink.fromfh = NFS_FH(dir);
	data->arg.symlink.fromname = dentry->d_name.name;
	data->arg.symlink.fromlen = dentry->d_name.len;
	data->arg.symlink.pages = &page;
	data->arg.symlink.pathlen = len;
	data->arg.symlink.sattr = sattr;

	status = nfs3_do_create(dir, dentry, data);

	nfs3_free_createdata(data);
517
out:
L
Linus Torvalds 已提交
518 519 520 521 522 523 524
	dprintk("NFS reply symlink: %d\n", status);
	return status;
}

static int
nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
{
525
	struct nfs3_createdata *data;
526
	int mode = sattr->ia_mode;
527
	int status = -ENOMEM;
L
Linus Torvalds 已提交
528 529

	dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
530 531 532

	sattr->ia_mode &= ~current->fs->umask;

533 534
	data = nfs3_alloc_createdata();
	if (data == NULL)
535
		goto out;
536 537 538 539 540 541 542 543

	data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
	data->arg.mkdir.fh = NFS_FH(dir);
	data->arg.mkdir.name = dentry->d_name.name;
	data->arg.mkdir.len = dentry->d_name.len;
	data->arg.mkdir.sattr = sattr;

	status = nfs3_do_create(dir, dentry, data);
544 545
	if (status != 0)
		goto out;
546

547 548
	status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
out:
549
	nfs3_free_createdata(data);
L
Linus Torvalds 已提交
550 551 552 553 554 555 556 557 558 559 560 561 562
	dprintk("NFS reply mkdir: %d\n", status);
	return status;
}

static int
nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
{
	struct nfs_fattr	dir_attr;
	struct nfs3_diropargs	arg = {
		.fh		= NFS_FH(dir),
		.name		= name->name,
		.len		= name->len
	};
C
Chuck Lever 已提交
563 564 565 566 567
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_RMDIR],
		.rpc_argp	= &arg,
		.rpc_resp	= &dir_attr,
	};
L
Linus Torvalds 已提交
568 569 570
	int			status;

	dprintk("NFS call  rmdir %s\n", name->name);
571
	nfs_fattr_init(&dir_attr);
C
Chuck Lever 已提交
572
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
573
	nfs_post_op_update_inode(dir, &dir_attr);
L
Linus Torvalds 已提交
574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592
	dprintk("NFS reply rmdir: %d\n", status);
	return status;
}

/*
 * The READDIR implementation is somewhat hackish - we pass the user buffer
 * to the encode function, which installs it in the receive iovec.
 * The decode function itself doesn't perform any decoding, it just makes
 * sure the reply is syntactically correct.
 *
 * Also note that this implementation handles both plain readdir and
 * readdirplus.
 */
static int
nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
		  u64 cookie, struct page *page, unsigned int count, int plus)
{
	struct inode		*dir = dentry->d_inode;
	struct nfs_fattr	dir_attr;
A
Al Viro 已提交
593
	__be32			*verf = NFS_COOKIEVERF(dir);
L
Linus Torvalds 已提交
594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620
	struct nfs3_readdirargs	arg = {
		.fh		= NFS_FH(dir),
		.cookie		= cookie,
		.verf		= {verf[0], verf[1]},
		.plus		= plus,
		.count		= count,
		.pages		= &page
	};
	struct nfs3_readdirres	res = {
		.dir_attr	= &dir_attr,
		.verf		= verf,
		.plus		= plus
	};
	struct rpc_message	msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_READDIR],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
		.rpc_cred	= cred
	};
	int			status;

	if (plus)
		msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];

	dprintk("NFS call  readdir%s %d\n",
			plus? "plus" : "", (unsigned int) cookie);

621
	nfs_fattr_init(&dir_attr);
L
Linus Torvalds 已提交
622
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
623 624 625

	nfs_invalidate_atime(dir);

L
Linus Torvalds 已提交
626 627 628 629 630 631 632 633 634
	nfs_refresh_inode(dir, &dir_attr);
	dprintk("NFS reply readdir: %d\n", status);
	return status;
}

static int
nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
		dev_t rdev)
{
635
	struct nfs3_createdata *data;
636
	mode_t mode = sattr->ia_mode;
637
	int status = -ENOMEM;
L
Linus Torvalds 已提交
638 639 640

	dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
			MAJOR(rdev), MINOR(rdev));
641 642 643

	sattr->ia_mode &= ~current->fs->umask;

644 645
	data = nfs3_alloc_createdata();
	if (data == NULL)
646
		goto out;
647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673

	data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
	data->arg.mknod.fh = NFS_FH(dir);
	data->arg.mknod.name = dentry->d_name.name;
	data->arg.mknod.len = dentry->d_name.len;
	data->arg.mknod.sattr = sattr;
	data->arg.mknod.rdev = rdev;

	switch (sattr->ia_mode & S_IFMT) {
	case S_IFBLK:
		data->arg.mknod.type = NF3BLK;
		break;
	case S_IFCHR:
		data->arg.mknod.type = NF3CHR;
		break;
	case S_IFIFO:
		data->arg.mknod.type = NF3FIFO;
		break;
	case S_IFSOCK:
		data->arg.mknod.type = NF3SOCK;
		break;
	default:
		status = -EINVAL;
		goto out;
	}

	status = nfs3_do_create(dir, dentry, data);
674 675 676 677
	if (status != 0)
		goto out;
	status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
out:
678
	nfs3_free_createdata(data);
L
Linus Torvalds 已提交
679 680 681 682 683 684 685 686
	dprintk("NFS reply mknod: %d\n", status);
	return status;
}

static int
nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
		 struct nfs_fsstat *stat)
{
C
Chuck Lever 已提交
687 688 689 690 691
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_FSSTAT],
		.rpc_argp	= fhandle,
		.rpc_resp	= stat,
	};
L
Linus Torvalds 已提交
692 693 694
	int	status;

	dprintk("NFS call  fsstat\n");
695
	nfs_fattr_init(stat->fattr);
C
Chuck Lever 已提交
696
	status = rpc_call_sync(server->client, &msg, 0);
L
Linus Torvalds 已提交
697 698 699 700 701
	dprintk("NFS reply statfs: %d\n", status);
	return status;
}

static int
E
EG Keizer 已提交
702
do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
L
Linus Torvalds 已提交
703 704
		 struct nfs_fsinfo *info)
{
C
Chuck Lever 已提交
705 706 707 708 709
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_FSINFO],
		.rpc_argp	= fhandle,
		.rpc_resp	= info,
	};
L
Linus Torvalds 已提交
710 711 712
	int	status;

	dprintk("NFS call  fsinfo\n");
713
	nfs_fattr_init(info->fattr);
E
EG Keizer 已提交
714
	status = rpc_call_sync(client, &msg, 0);
L
Linus Torvalds 已提交
715 716 717 718
	dprintk("NFS reply fsinfo: %d\n", status);
	return status;
}

E
EG Keizer 已提交
719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734
/*
 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 * nfs_create_server
 */
static int
nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
		   struct nfs_fsinfo *info)
{
	int	status;

	status = do_proc_fsinfo(server->client, fhandle, info);
	if (status && server->nfs_client->cl_rpcclient != server->client)
		status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
	return status;
}

L
Linus Torvalds 已提交
735 736 737 738
static int
nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
		   struct nfs_pathconf *info)
{
C
Chuck Lever 已提交
739 740 741 742 743
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_PATHCONF],
		.rpc_argp	= fhandle,
		.rpc_resp	= info,
	};
L
Linus Torvalds 已提交
744 745 746
	int	status;

	dprintk("NFS call  pathconf\n");
747
	nfs_fattr_init(info->fattr);
C
Chuck Lever 已提交
748
	status = rpc_call_sync(server->client, &msg, 0);
L
Linus Torvalds 已提交
749 750 751 752
	dprintk("NFS reply pathconf: %d\n", status);
	return status;
}

T
Trond Myklebust 已提交
753
static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
L
Linus Torvalds 已提交
754
{
755
	if (nfs3_async_handle_jukebox(task, data->inode))
T
Trond Myklebust 已提交
756
		return -EAGAIN;
757 758 759

	nfs_invalidate_atime(data->inode);
	nfs_refresh_inode(data->inode, &data->fattr);
T
Trond Myklebust 已提交
760
	return 0;
L
Linus Torvalds 已提交
761 762
}

763
static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
L
Linus Torvalds 已提交
764
{
765
	msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
L
Linus Torvalds 已提交
766 767
}

768
static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
L
Linus Torvalds 已提交
769
{
770
	if (nfs3_async_handle_jukebox(task, data->inode))
771
		return -EAGAIN;
L
Linus Torvalds 已提交
772
	if (task->tk_status >= 0)
773
		nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
774
	return 0;
L
Linus Torvalds 已提交
775 776
}

777
static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
L
Linus Torvalds 已提交
778
{
779
	msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
L
Linus Torvalds 已提交
780 781
}

782
static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
L
Linus Torvalds 已提交
783
{
784
	if (nfs3_async_handle_jukebox(task, data->inode))
785
		return -EAGAIN;
786
	nfs_refresh_inode(data->inode, data->res.fattr);
787
	return 0;
L
Linus Torvalds 已提交
788 789
}

790
static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
L
Linus Torvalds 已提交
791
{
792
	msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
L
Linus Torvalds 已提交
793 794 795 796 797
}

static int
nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
{
798 799 800
	struct inode *inode = filp->f_path.dentry->d_inode;

	return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
L
Linus Torvalds 已提交
801 802
}

D
David Howells 已提交
803
const struct nfs_rpc_ops nfs_v3_clientops = {
L
Linus Torvalds 已提交
804 805
	.version	= 3,			/* protocol version */
	.dentry_ops	= &nfs_dentry_operations,
806 807
	.dir_inode_ops	= &nfs3_dir_inode_operations,
	.file_inode_ops	= &nfs3_file_inode_operations,
L
Linus Torvalds 已提交
808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829
	.getroot	= nfs3_proc_get_root,
	.getattr	= nfs3_proc_getattr,
	.setattr	= nfs3_proc_setattr,
	.lookup		= nfs3_proc_lookup,
	.access		= nfs3_proc_access,
	.readlink	= nfs3_proc_readlink,
	.create		= nfs3_proc_create,
	.remove		= nfs3_proc_remove,
	.unlink_setup	= nfs3_proc_unlink_setup,
	.unlink_done	= nfs3_proc_unlink_done,
	.rename		= nfs3_proc_rename,
	.link		= nfs3_proc_link,
	.symlink	= nfs3_proc_symlink,
	.mkdir		= nfs3_proc_mkdir,
	.rmdir		= nfs3_proc_rmdir,
	.readdir	= nfs3_proc_readdir,
	.mknod		= nfs3_proc_mknod,
	.statfs		= nfs3_proc_statfs,
	.fsinfo		= nfs3_proc_fsinfo,
	.pathconf	= nfs3_proc_pathconf,
	.decode_dirent	= nfs3_decode_dirent,
	.read_setup	= nfs3_proc_read_setup,
T
Trond Myklebust 已提交
830
	.read_done	= nfs3_read_done,
L
Linus Torvalds 已提交
831
	.write_setup	= nfs3_proc_write_setup,
832
	.write_done	= nfs3_write_done,
L
Linus Torvalds 已提交
833
	.commit_setup	= nfs3_proc_commit_setup,
834
	.commit_done	= nfs3_commit_done,
L
Linus Torvalds 已提交
835
	.lock		= nfs3_proc_lock,
836
	.clear_acl_cache = nfs3_forget_cached_acls,
T
Trond Myklebust 已提交
837
	.close_context	= nfs_close_context,
L
Linus Torvalds 已提交
838
};