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
->client_sys
, &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
->client_sys
, &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
);
189 static int nfs_proc_read(struct nfs_read_data
*rdata
)
191 int flags
= rdata
->flags
;
192 struct inode
* inode
= rdata
->inode
;
193 struct nfs_fattr
* fattr
= rdata
->res
.fattr
;
194 struct rpc_message msg
= {
195 .rpc_proc
= &nfs_procedures
[NFSPROC_READ
],
196 .rpc_argp
= &rdata
->args
,
197 .rpc_resp
= &rdata
->res
,
198 .rpc_cred
= rdata
->cred
,
202 dprintk("NFS call read %d @ %Ld\n", rdata
->args
.count
,
203 (long long) rdata
->args
.offset
);
204 nfs_fattr_init(fattr
);
205 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, flags
);
207 nfs_refresh_inode(inode
, fattr
);
208 /* Emulate the eof flag, which isn't normally needed in NFSv2
209 * as it is guaranteed to always return the file attributes
211 if (rdata
->args
.offset
+ rdata
->args
.count
>= fattr
->size
)
214 dprintk("NFS reply read: %d\n", status
);
218 static int nfs_proc_write(struct nfs_write_data
*wdata
)
220 int flags
= wdata
->flags
;
221 struct inode
* inode
= wdata
->inode
;
222 struct nfs_fattr
* fattr
= wdata
->res
.fattr
;
223 struct rpc_message msg
= {
224 .rpc_proc
= &nfs_procedures
[NFSPROC_WRITE
],
225 .rpc_argp
= &wdata
->args
,
226 .rpc_resp
= &wdata
->res
,
227 .rpc_cred
= wdata
->cred
,
231 dprintk("NFS call write %d @ %Ld\n", wdata
->args
.count
,
232 (long long) wdata
->args
.offset
);
233 nfs_fattr_init(fattr
);
234 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, flags
);
236 nfs_post_op_update_inode(inode
, fattr
);
237 wdata
->res
.count
= wdata
->args
.count
;
238 wdata
->verf
.committed
= NFS_FILE_SYNC
;
240 dprintk("NFS reply write: %d\n", status
);
241 return status
< 0? status
: wdata
->res
.count
;
245 nfs_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
246 int flags
, struct nameidata
*nd
)
248 struct nfs_fh fhandle
;
249 struct nfs_fattr fattr
;
250 struct nfs_createargs arg
= {
252 .name
= dentry
->d_name
.name
,
253 .len
= dentry
->d_name
.len
,
256 struct nfs_diropok res
= {
260 struct rpc_message msg
= {
261 .rpc_proc
= &nfs_procedures
[NFSPROC_CREATE
],
267 nfs_fattr_init(&fattr
);
268 dprintk("NFS call create %s\n", dentry
->d_name
.name
);
269 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
271 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
272 dprintk("NFS reply create: %d\n", status
);
277 * In NFSv2, mknod is grafted onto the create call.
280 nfs_proc_mknod(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
283 struct nfs_fh fhandle
;
284 struct nfs_fattr fattr
;
285 struct nfs_createargs arg
= {
287 .name
= dentry
->d_name
.name
,
288 .len
= dentry
->d_name
.len
,
291 struct nfs_diropok res
= {
295 struct rpc_message msg
= {
296 .rpc_proc
= &nfs_procedures
[NFSPROC_CREATE
],
302 dprintk("NFS call mknod %s\n", dentry
->d_name
.name
);
304 mode
= sattr
->ia_mode
;
305 if (S_ISFIFO(mode
)) {
306 sattr
->ia_mode
= (mode
& ~S_IFMT
) | S_IFCHR
;
307 sattr
->ia_valid
&= ~ATTR_SIZE
;
308 } else if (S_ISCHR(mode
) || S_ISBLK(mode
)) {
309 sattr
->ia_valid
|= ATTR_SIZE
;
310 sattr
->ia_size
= new_encode_dev(rdev
);/* get out your barf bag */
313 nfs_fattr_init(&fattr
);
314 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
315 nfs_mark_for_revalidate(dir
);
317 if (status
== -EINVAL
&& S_ISFIFO(mode
)) {
318 sattr
->ia_mode
= mode
;
319 nfs_fattr_init(&fattr
);
320 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
323 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
324 dprintk("NFS reply mknod: %d\n", status
);
329 nfs_proc_remove(struct inode
*dir
, struct qstr
*name
)
331 struct nfs_diropargs arg
= {
336 struct rpc_message msg
= {
337 .rpc_proc
= &nfs_procedures
[NFSPROC_REMOVE
],
342 dprintk("NFS call remove %s\n", name
->name
);
343 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
344 nfs_mark_for_revalidate(dir
);
346 dprintk("NFS reply remove: %d\n", status
);
351 nfs_proc_unlink_setup(struct rpc_message
*msg
, struct dentry
*dir
, struct qstr
*name
)
353 struct nfs_diropargs
*arg
;
355 arg
= (struct nfs_diropargs
*)kmalloc(sizeof(*arg
), GFP_KERNEL
);
358 arg
->fh
= NFS_FH(dir
->d_inode
);
359 arg
->name
= name
->name
;
360 arg
->len
= name
->len
;
361 msg
->rpc_proc
= &nfs_procedures
[NFSPROC_REMOVE
];
367 nfs_proc_unlink_done(struct dentry
*dir
, struct rpc_task
*task
)
369 struct rpc_message
*msg
= &task
->tk_msg
;
372 nfs_mark_for_revalidate(dir
->d_inode
);
373 kfree(msg
->rpc_argp
);
379 nfs_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
380 struct inode
*new_dir
, struct qstr
*new_name
)
382 struct nfs_renameargs arg
= {
383 .fromfh
= NFS_FH(old_dir
),
384 .fromname
= old_name
->name
,
385 .fromlen
= old_name
->len
,
386 .tofh
= NFS_FH(new_dir
),
387 .toname
= new_name
->name
,
388 .tolen
= new_name
->len
390 struct rpc_message msg
= {
391 .rpc_proc
= &nfs_procedures
[NFSPROC_RENAME
],
396 dprintk("NFS call rename %s -> %s\n", old_name
->name
, new_name
->name
);
397 status
= rpc_call_sync(NFS_CLIENT(old_dir
), &msg
, 0);
398 nfs_mark_for_revalidate(old_dir
);
399 nfs_mark_for_revalidate(new_dir
);
400 dprintk("NFS reply rename: %d\n", status
);
405 nfs_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
407 struct nfs_linkargs arg
= {
408 .fromfh
= NFS_FH(inode
),
410 .toname
= name
->name
,
413 struct rpc_message msg
= {
414 .rpc_proc
= &nfs_procedures
[NFSPROC_LINK
],
419 dprintk("NFS call link %s\n", name
->name
);
420 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
421 nfs_mark_for_revalidate(inode
);
422 nfs_mark_for_revalidate(dir
);
423 dprintk("NFS reply link: %d\n", status
);
428 nfs_proc_symlink(struct inode
*dir
, struct qstr
*name
, struct qstr
*path
,
429 struct iattr
*sattr
, struct nfs_fh
*fhandle
,
430 struct nfs_fattr
*fattr
)
432 struct nfs_symlinkargs arg
= {
433 .fromfh
= NFS_FH(dir
),
434 .fromname
= name
->name
,
435 .fromlen
= name
->len
,
436 .topath
= path
->name
,
440 struct rpc_message msg
= {
441 .rpc_proc
= &nfs_procedures
[NFSPROC_SYMLINK
],
446 if (path
->len
> NFS2_MAXPATHLEN
)
447 return -ENAMETOOLONG
;
448 dprintk("NFS call symlink %s -> %s\n", name
->name
, path
->name
);
449 nfs_fattr_init(fattr
);
451 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
452 nfs_mark_for_revalidate(dir
);
453 dprintk("NFS reply symlink: %d\n", status
);
458 nfs_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
)
460 struct nfs_fh fhandle
;
461 struct nfs_fattr fattr
;
462 struct nfs_createargs arg
= {
464 .name
= dentry
->d_name
.name
,
465 .len
= dentry
->d_name
.len
,
468 struct nfs_diropok res
= {
472 struct rpc_message msg
= {
473 .rpc_proc
= &nfs_procedures
[NFSPROC_MKDIR
],
479 dprintk("NFS call mkdir %s\n", dentry
->d_name
.name
);
480 nfs_fattr_init(&fattr
);
481 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
482 nfs_mark_for_revalidate(dir
);
484 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
485 dprintk("NFS reply mkdir: %d\n", status
);
490 nfs_proc_rmdir(struct inode
*dir
, struct qstr
*name
)
492 struct nfs_diropargs arg
= {
497 struct rpc_message msg
= {
498 .rpc_proc
= &nfs_procedures
[NFSPROC_RMDIR
],
503 dprintk("NFS call rmdir %s\n", name
->name
);
504 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
505 nfs_mark_for_revalidate(dir
);
506 dprintk("NFS reply rmdir: %d\n", status
);
511 * The READDIR implementation is somewhat hackish - we pass a temporary
512 * buffer to the encode function, which installs it in the receive
513 * the receive iovec. The decode function just parses the reply to make
514 * sure it is syntactically correct; the entries itself are decoded
515 * from nfs_readdir by calling the decode_entry function directly.
518 nfs_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
519 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
521 struct inode
*dir
= dentry
->d_inode
;
522 struct nfs_readdirargs arg
= {
528 struct rpc_message msg
= {
529 .rpc_proc
= &nfs_procedures
[NFSPROC_READDIR
],
537 dprintk("NFS call readdir %d\n", (unsigned int)cookie
);
538 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
540 dprintk("NFS reply readdir: %d\n", status
);
546 nfs_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
547 struct nfs_fsstat
*stat
)
549 struct nfs2_fsstat fsinfo
;
550 struct rpc_message msg
= {
551 .rpc_proc
= &nfs_procedures
[NFSPROC_STATFS
],
557 dprintk("NFS call statfs\n");
558 nfs_fattr_init(stat
->fattr
);
559 status
= rpc_call_sync(server
->client
, &msg
, 0);
560 dprintk("NFS reply statfs: %d\n", status
);
563 stat
->tbytes
= (u64
)fsinfo
.blocks
* fsinfo
.bsize
;
564 stat
->fbytes
= (u64
)fsinfo
.bfree
* fsinfo
.bsize
;
565 stat
->abytes
= (u64
)fsinfo
.bavail
* fsinfo
.bsize
;
574 nfs_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
575 struct nfs_fsinfo
*info
)
577 struct nfs2_fsstat fsinfo
;
578 struct rpc_message msg
= {
579 .rpc_proc
= &nfs_procedures
[NFSPROC_STATFS
],
585 dprintk("NFS call fsinfo\n");
586 nfs_fattr_init(info
->fattr
);
587 status
= rpc_call_sync(server
->client
, &msg
, 0);
588 dprintk("NFS reply fsinfo: %d\n", status
);
591 info
->rtmax
= NFS_MAXDATA
;
592 info
->rtpref
= fsinfo
.tsize
;
593 info
->rtmult
= fsinfo
.bsize
;
594 info
->wtmax
= NFS_MAXDATA
;
595 info
->wtpref
= fsinfo
.tsize
;
596 info
->wtmult
= fsinfo
.bsize
;
597 info
->dtpref
= fsinfo
.tsize
;
598 info
->maxfilesize
= 0x7FFFFFFF;
599 info
->lease_time
= 0;
605 nfs_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
606 struct nfs_pathconf
*info
)
609 info
->max_namelen
= NFS2_MAXNAMLEN
;
613 static int nfs_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
615 if (task
->tk_status
>= 0) {
616 nfs_refresh_inode(data
->inode
, data
->res
.fattr
);
617 /* Emulate the eof flag, which isn't normally needed in NFSv2
618 * as it is guaranteed to always return the file attributes
620 if (data
->args
.offset
+ data
->args
.count
>= data
->res
.fattr
->size
)
626 static void nfs_proc_read_setup(struct nfs_read_data
*data
)
628 struct rpc_message msg
= {
629 .rpc_proc
= &nfs_procedures
[NFSPROC_READ
],
630 .rpc_argp
= &data
->args
,
631 .rpc_resp
= &data
->res
,
632 .rpc_cred
= data
->cred
,
635 rpc_call_setup(&data
->task
, &msg
, 0);
638 static int nfs_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
640 if (task
->tk_status
>= 0)
641 nfs_post_op_update_inode(data
->inode
, data
->res
.fattr
);
645 static void nfs_proc_write_setup(struct nfs_write_data
*data
, int how
)
647 struct rpc_message msg
= {
648 .rpc_proc
= &nfs_procedures
[NFSPROC_WRITE
],
649 .rpc_argp
= &data
->args
,
650 .rpc_resp
= &data
->res
,
651 .rpc_cred
= data
->cred
,
654 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
655 data
->args
.stable
= NFS_FILE_SYNC
;
657 /* Finalize the task. */
658 rpc_call_setup(&data
->task
, &msg
, 0);
662 nfs_proc_commit_setup(struct nfs_write_data
*data
, int how
)
668 nfs_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*fl
)
670 return nlmclnt_proc(filp
->f_dentry
->d_inode
, cmd
, fl
);
674 struct nfs_rpc_ops nfs_v2_clientops
= {
675 .version
= 2, /* protocol version */
676 .dentry_ops
= &nfs_dentry_operations
,
677 .dir_inode_ops
= &nfs_dir_inode_operations
,
678 .file_inode_ops
= &nfs_file_inode_operations
,
679 .getroot
= nfs_proc_get_root
,
680 .getattr
= nfs_proc_getattr
,
681 .setattr
= nfs_proc_setattr
,
682 .lookup
= nfs_proc_lookup
,
683 .access
= NULL
, /* access */
684 .readlink
= nfs_proc_readlink
,
685 .read
= nfs_proc_read
,
686 .write
= nfs_proc_write
,
687 .commit
= NULL
, /* commit */
688 .create
= nfs_proc_create
,
689 .remove
= nfs_proc_remove
,
690 .unlink_setup
= nfs_proc_unlink_setup
,
691 .unlink_done
= nfs_proc_unlink_done
,
692 .rename
= nfs_proc_rename
,
693 .link
= nfs_proc_link
,
694 .symlink
= nfs_proc_symlink
,
695 .mkdir
= nfs_proc_mkdir
,
696 .rmdir
= nfs_proc_rmdir
,
697 .readdir
= nfs_proc_readdir
,
698 .mknod
= nfs_proc_mknod
,
699 .statfs
= nfs_proc_statfs
,
700 .fsinfo
= nfs_proc_fsinfo
,
701 .pathconf
= nfs_proc_pathconf
,
702 .decode_dirent
= nfs_decode_dirent
,
703 .read_setup
= nfs_proc_read_setup
,
704 .read_done
= nfs_read_done
,
705 .write_setup
= nfs_proc_write_setup
,
706 .write_done
= nfs_write_done
,
707 .commit_setup
= nfs_proc_commit_setup
,
708 .file_open
= nfs_open
,
709 .file_release
= nfs_release
,
710 .lock
= nfs_proc_lock
,