4 * Copyright (C) 1992, 1993, 1994 Rick Sladkey
6 * OS-independent nfs remote procedure call functions
8 * Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers
9 * so at last we can have decent(ish) throughput off a
12 * Coding optimized and cleaned up by Florian La Roche.
13 * Note: Error returns are optimized for NFS_OK, which isn't translated via
14 * nfs_stat_to_errno(), but happens to be already the right return code.
16 * Also, the code currently doesn't check the size of the packet, when
17 * it decodes the packet.
19 * Feel free to fix it and mail me the diffs if it worries you.
21 * Completely rewritten to support the new RPC call interface;
22 * rewrote and moved the entire XDR stuff to xdr.c
23 * --Olaf Kirch June 1996
25 * The code below initializes all auto variables explicitly, otherwise
26 * it will fail to work as a module (gcc generates a memset call for an
30 #include <linux/types.h>
31 #include <linux/param.h>
32 #include <linux/slab.h>
33 #include <linux/time.h>
35 #include <linux/utsname.h>
36 #include <linux/errno.h>
37 #include <linux/string.h>
39 #include <linux/pagemap.h>
40 #include <linux/sunrpc/clnt.h>
41 #include <linux/nfs.h>
42 #include <linux/nfs2.h>
43 #include <linux/nfs_fs.h>
44 #include <linux/nfs_page.h>
45 #include <linux/lockd/bind.h>
46 #include <linux/smp_lock.h>
49 #define NFSDBG_FACILITY NFSDBG_PROC
52 * Bare-bones access to getattr: this is for nfs_read_super.
55 nfs_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
56 struct nfs_fsinfo
*info
)
58 struct nfs_fattr
*fattr
= info
->fattr
;
59 struct nfs2_fsstat fsinfo
;
60 struct rpc_message msg
= {
61 .rpc_proc
= &nfs_procedures
[NFSPROC_GETATTR
],
67 dprintk("%s: call getattr\n", __FUNCTION__
);
68 nfs_fattr_init(fattr
);
69 status
= rpc_call_sync(server
->nfs_client
->cl_rpcclient
, &msg
, 0);
70 dprintk("%s: reply getattr: %d\n", __FUNCTION__
, status
);
73 dprintk("%s: call statfs\n", __FUNCTION__
);
74 msg
.rpc_proc
= &nfs_procedures
[NFSPROC_STATFS
];
75 msg
.rpc_resp
= &fsinfo
;
76 status
= rpc_call_sync(server
->nfs_client
->cl_rpcclient
, &msg
, 0);
77 dprintk("%s: reply statfs: %d\n", __FUNCTION__
, status
);
80 info
->rtmax
= NFS_MAXDATA
;
81 info
->rtpref
= fsinfo
.tsize
;
82 info
->rtmult
= fsinfo
.bsize
;
83 info
->wtmax
= NFS_MAXDATA
;
84 info
->wtpref
= fsinfo
.tsize
;
85 info
->wtmult
= fsinfo
.bsize
;
86 info
->dtpref
= fsinfo
.tsize
;
87 info
->maxfilesize
= 0x7FFFFFFF;
93 * One function for each procedure in the NFS protocol.
96 nfs_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
97 struct nfs_fattr
*fattr
)
99 struct rpc_message msg
= {
100 .rpc_proc
= &nfs_procedures
[NFSPROC_GETATTR
],
106 dprintk("NFS call getattr\n");
107 nfs_fattr_init(fattr
);
108 status
= rpc_call_sync(server
->client
, &msg
, 0);
109 dprintk("NFS reply getattr: %d\n", status
);
114 nfs_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
117 struct inode
*inode
= dentry
->d_inode
;
118 struct nfs_sattrargs arg
= {
122 struct rpc_message msg
= {
123 .rpc_proc
= &nfs_procedures
[NFSPROC_SETATTR
],
129 /* Mask out the non-modebit related stuff from attr->ia_mode */
130 sattr
->ia_mode
&= S_IALLUGO
;
132 dprintk("NFS call setattr\n");
133 nfs_fattr_init(fattr
);
134 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
136 nfs_setattr_update_inode(inode
, sattr
);
137 dprintk("NFS reply setattr: %d\n", status
);
142 nfs_proc_lookup(struct inode
*dir
, struct qstr
*name
,
143 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
145 struct nfs_diropargs arg
= {
150 struct nfs_diropok res
= {
154 struct rpc_message msg
= {
155 .rpc_proc
= &nfs_procedures
[NFSPROC_LOOKUP
],
161 dprintk("NFS call lookup %s\n", name
->name
);
162 nfs_fattr_init(fattr
);
163 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
164 dprintk("NFS reply lookup: %d\n", status
);
168 static int nfs_proc_readlink(struct inode
*inode
, struct page
*page
,
169 unsigned int pgbase
, unsigned int pglen
)
171 struct nfs_readlinkargs args
= {
177 struct rpc_message msg
= {
178 .rpc_proc
= &nfs_procedures
[NFSPROC_READLINK
],
183 dprintk("NFS call readlink\n");
184 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
185 dprintk("NFS reply readlink: %d\n", status
);
190 nfs_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
191 int flags
, struct nameidata
*nd
)
193 struct nfs_fh fhandle
;
194 struct nfs_fattr fattr
;
195 struct nfs_createargs arg
= {
197 .name
= dentry
->d_name
.name
,
198 .len
= dentry
->d_name
.len
,
201 struct nfs_diropok res
= {
205 struct rpc_message msg
= {
206 .rpc_proc
= &nfs_procedures
[NFSPROC_CREATE
],
212 nfs_fattr_init(&fattr
);
213 dprintk("NFS call create %s\n", dentry
->d_name
.name
);
214 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
216 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
217 dprintk("NFS reply create: %d\n", status
);
222 * In NFSv2, mknod is grafted onto the create call.
225 nfs_proc_mknod(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
228 struct nfs_fh fhandle
;
229 struct nfs_fattr fattr
;
230 struct nfs_createargs arg
= {
232 .name
= dentry
->d_name
.name
,
233 .len
= dentry
->d_name
.len
,
236 struct nfs_diropok res
= {
240 struct rpc_message msg
= {
241 .rpc_proc
= &nfs_procedures
[NFSPROC_CREATE
],
247 dprintk("NFS call mknod %s\n", dentry
->d_name
.name
);
249 mode
= sattr
->ia_mode
;
250 if (S_ISFIFO(mode
)) {
251 sattr
->ia_mode
= (mode
& ~S_IFMT
) | S_IFCHR
;
252 sattr
->ia_valid
&= ~ATTR_SIZE
;
253 } else if (S_ISCHR(mode
) || S_ISBLK(mode
)) {
254 sattr
->ia_valid
|= ATTR_SIZE
;
255 sattr
->ia_size
= new_encode_dev(rdev
);/* get out your barf bag */
258 nfs_fattr_init(&fattr
);
259 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
260 nfs_mark_for_revalidate(dir
);
262 if (status
== -EINVAL
&& S_ISFIFO(mode
)) {
263 sattr
->ia_mode
= mode
;
264 nfs_fattr_init(&fattr
);
265 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
268 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
269 dprintk("NFS reply mknod: %d\n", status
);
274 nfs_proc_remove(struct inode
*dir
, struct qstr
*name
)
276 struct nfs_diropargs arg
= {
281 struct rpc_message msg
= {
282 .rpc_proc
= &nfs_procedures
[NFSPROC_REMOVE
],
287 dprintk("NFS call remove %s\n", name
->name
);
288 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
289 nfs_mark_for_revalidate(dir
);
291 dprintk("NFS reply remove: %d\n", status
);
296 nfs_proc_unlink_setup(struct rpc_message
*msg
, struct dentry
*dir
, struct qstr
*name
)
298 struct nfs_diropargs
*arg
;
300 arg
= kmalloc(sizeof(*arg
), GFP_KERNEL
);
303 arg
->fh
= NFS_FH(dir
->d_inode
);
304 arg
->name
= name
->name
;
305 arg
->len
= name
->len
;
306 msg
->rpc_proc
= &nfs_procedures
[NFSPROC_REMOVE
];
312 nfs_proc_unlink_done(struct dentry
*dir
, struct rpc_task
*task
)
314 struct rpc_message
*msg
= &task
->tk_msg
;
317 nfs_mark_for_revalidate(dir
->d_inode
);
318 kfree(msg
->rpc_argp
);
324 nfs_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
325 struct inode
*new_dir
, struct qstr
*new_name
)
327 struct nfs_renameargs arg
= {
328 .fromfh
= NFS_FH(old_dir
),
329 .fromname
= old_name
->name
,
330 .fromlen
= old_name
->len
,
331 .tofh
= NFS_FH(new_dir
),
332 .toname
= new_name
->name
,
333 .tolen
= new_name
->len
335 struct rpc_message msg
= {
336 .rpc_proc
= &nfs_procedures
[NFSPROC_RENAME
],
341 dprintk("NFS call rename %s -> %s\n", old_name
->name
, new_name
->name
);
342 status
= rpc_call_sync(NFS_CLIENT(old_dir
), &msg
, 0);
343 nfs_mark_for_revalidate(old_dir
);
344 nfs_mark_for_revalidate(new_dir
);
345 dprintk("NFS reply rename: %d\n", status
);
350 nfs_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
352 struct nfs_linkargs arg
= {
353 .fromfh
= NFS_FH(inode
),
355 .toname
= name
->name
,
358 struct rpc_message msg
= {
359 .rpc_proc
= &nfs_procedures
[NFSPROC_LINK
],
364 dprintk("NFS call link %s\n", name
->name
);
365 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
366 nfs_mark_for_revalidate(inode
);
367 nfs_mark_for_revalidate(dir
);
368 dprintk("NFS reply link: %d\n", status
);
373 nfs_proc_symlink(struct inode
*dir
, struct dentry
*dentry
, struct page
*page
,
374 unsigned int len
, struct iattr
*sattr
)
376 struct nfs_fh fhandle
;
377 struct nfs_fattr fattr
;
378 struct nfs_symlinkargs arg
= {
379 .fromfh
= NFS_FH(dir
),
380 .fromname
= dentry
->d_name
.name
,
381 .fromlen
= dentry
->d_name
.len
,
386 struct rpc_message msg
= {
387 .rpc_proc
= &nfs_procedures
[NFSPROC_SYMLINK
],
392 if (len
> NFS2_MAXPATHLEN
)
393 return -ENAMETOOLONG
;
395 dprintk("NFS call symlink %s\n", dentry
->d_name
.name
);
397 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
398 nfs_mark_for_revalidate(dir
);
401 * V2 SYMLINK requests don't return any attributes. Setting the
402 * filehandle size to zero indicates to nfs_instantiate that it
403 * should fill in the data with a LOOKUP call on the wire.
406 nfs_fattr_init(&fattr
);
408 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
411 dprintk("NFS reply symlink: %d\n", status
);
416 nfs_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
)
418 struct nfs_fh fhandle
;
419 struct nfs_fattr fattr
;
420 struct nfs_createargs arg
= {
422 .name
= dentry
->d_name
.name
,
423 .len
= dentry
->d_name
.len
,
426 struct nfs_diropok res
= {
430 struct rpc_message msg
= {
431 .rpc_proc
= &nfs_procedures
[NFSPROC_MKDIR
],
437 dprintk("NFS call mkdir %s\n", dentry
->d_name
.name
);
438 nfs_fattr_init(&fattr
);
439 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
440 nfs_mark_for_revalidate(dir
);
442 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
443 dprintk("NFS reply mkdir: %d\n", status
);
448 nfs_proc_rmdir(struct inode
*dir
, struct qstr
*name
)
450 struct nfs_diropargs arg
= {
455 struct rpc_message msg
= {
456 .rpc_proc
= &nfs_procedures
[NFSPROC_RMDIR
],
461 dprintk("NFS call rmdir %s\n", name
->name
);
462 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
463 nfs_mark_for_revalidate(dir
);
464 dprintk("NFS reply rmdir: %d\n", status
);
469 * The READDIR implementation is somewhat hackish - we pass a temporary
470 * buffer to the encode function, which installs it in the receive
471 * the receive iovec. The decode function just parses the reply to make
472 * sure it is syntactically correct; the entries itself are decoded
473 * from nfs_readdir by calling the decode_entry function directly.
476 nfs_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
477 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
479 struct inode
*dir
= dentry
->d_inode
;
480 struct nfs_readdirargs arg
= {
486 struct rpc_message msg
= {
487 .rpc_proc
= &nfs_procedures
[NFSPROC_READDIR
],
493 dprintk("NFS call readdir %d\n", (unsigned int)cookie
);
494 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
496 dprintk("NFS reply readdir: %d\n", status
);
501 nfs_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
502 struct nfs_fsstat
*stat
)
504 struct nfs2_fsstat fsinfo
;
505 struct rpc_message msg
= {
506 .rpc_proc
= &nfs_procedures
[NFSPROC_STATFS
],
512 dprintk("NFS call statfs\n");
513 nfs_fattr_init(stat
->fattr
);
514 status
= rpc_call_sync(server
->client
, &msg
, 0);
515 dprintk("NFS reply statfs: %d\n", status
);
518 stat
->tbytes
= (u64
)fsinfo
.blocks
* fsinfo
.bsize
;
519 stat
->fbytes
= (u64
)fsinfo
.bfree
* fsinfo
.bsize
;
520 stat
->abytes
= (u64
)fsinfo
.bavail
* fsinfo
.bsize
;
529 nfs_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
530 struct nfs_fsinfo
*info
)
532 struct nfs2_fsstat fsinfo
;
533 struct rpc_message msg
= {
534 .rpc_proc
= &nfs_procedures
[NFSPROC_STATFS
],
540 dprintk("NFS call fsinfo\n");
541 nfs_fattr_init(info
->fattr
);
542 status
= rpc_call_sync(server
->client
, &msg
, 0);
543 dprintk("NFS reply fsinfo: %d\n", status
);
546 info
->rtmax
= NFS_MAXDATA
;
547 info
->rtpref
= fsinfo
.tsize
;
548 info
->rtmult
= fsinfo
.bsize
;
549 info
->wtmax
= NFS_MAXDATA
;
550 info
->wtpref
= fsinfo
.tsize
;
551 info
->wtmult
= fsinfo
.bsize
;
552 info
->dtpref
= fsinfo
.tsize
;
553 info
->maxfilesize
= 0x7FFFFFFF;
554 info
->lease_time
= 0;
560 nfs_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
561 struct nfs_pathconf
*info
)
564 info
->max_namelen
= NFS2_MAXNAMLEN
;
568 static int nfs_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
570 if (task
->tk_status
>= 0) {
571 nfs_refresh_inode(data
->inode
, data
->res
.fattr
);
572 /* Emulate the eof flag, which isn't normally needed in NFSv2
573 * as it is guaranteed to always return the file attributes
575 if (data
->args
.offset
+ data
->args
.count
>= data
->res
.fattr
->size
)
581 static void nfs_proc_read_setup(struct nfs_read_data
*data
)
583 struct rpc_message msg
= {
584 .rpc_proc
= &nfs_procedures
[NFSPROC_READ
],
585 .rpc_argp
= &data
->args
,
586 .rpc_resp
= &data
->res
,
587 .rpc_cred
= data
->cred
,
590 rpc_call_setup(&data
->task
, &msg
, 0);
593 static int nfs_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
595 if (task
->tk_status
>= 0)
596 nfs_post_op_update_inode(data
->inode
, data
->res
.fattr
);
600 static void nfs_proc_write_setup(struct nfs_write_data
*data
, int how
)
602 struct rpc_message msg
= {
603 .rpc_proc
= &nfs_procedures
[NFSPROC_WRITE
],
604 .rpc_argp
= &data
->args
,
605 .rpc_resp
= &data
->res
,
606 .rpc_cred
= data
->cred
,
609 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
610 data
->args
.stable
= NFS_FILE_SYNC
;
612 /* Finalize the task. */
613 rpc_call_setup(&data
->task
, &msg
, 0);
617 nfs_proc_commit_setup(struct nfs_write_data
*data
, int how
)
623 nfs_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*fl
)
625 return nlmclnt_proc(filp
->f_path
.dentry
->d_inode
, cmd
, fl
);
629 const struct nfs_rpc_ops nfs_v2_clientops
= {
630 .version
= 2, /* protocol version */
631 .dentry_ops
= &nfs_dentry_operations
,
632 .dir_inode_ops
= &nfs_dir_inode_operations
,
633 .file_inode_ops
= &nfs_file_inode_operations
,
634 .getroot
= nfs_proc_get_root
,
635 .getattr
= nfs_proc_getattr
,
636 .setattr
= nfs_proc_setattr
,
637 .lookup
= nfs_proc_lookup
,
638 .access
= NULL
, /* access */
639 .readlink
= nfs_proc_readlink
,
640 .create
= nfs_proc_create
,
641 .remove
= nfs_proc_remove
,
642 .unlink_setup
= nfs_proc_unlink_setup
,
643 .unlink_done
= nfs_proc_unlink_done
,
644 .rename
= nfs_proc_rename
,
645 .link
= nfs_proc_link
,
646 .symlink
= nfs_proc_symlink
,
647 .mkdir
= nfs_proc_mkdir
,
648 .rmdir
= nfs_proc_rmdir
,
649 .readdir
= nfs_proc_readdir
,
650 .mknod
= nfs_proc_mknod
,
651 .statfs
= nfs_proc_statfs
,
652 .fsinfo
= nfs_proc_fsinfo
,
653 .pathconf
= nfs_proc_pathconf
,
654 .decode_dirent
= nfs_decode_dirent
,
655 .read_setup
= nfs_proc_read_setup
,
656 .read_done
= nfs_read_done
,
657 .write_setup
= nfs_proc_write_setup
,
658 .write_done
= nfs_write_done
,
659 .commit_setup
= nfs_proc_commit_setup
,
660 .file_open
= nfs_open
,
661 .file_release
= nfs_release
,
662 .lock
= nfs_proc_lock
,