768 lines
18 KiB
C
768 lines
18 KiB
C
/*
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* linux/fs/nfs/proc.c
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*
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* Copyright (C) 1992 Rick Sladkey
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*
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* OS-independent nfs remote procedure call functions
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*/
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/*
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* Defining NFS_PROC_DEBUG causes a lookup of a file named
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* "xyzzy" to toggle debugging. Just cd to an NFS-mounted
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* filesystem and type 'ls xyzzy' to turn on debugging.
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*/
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#if 0
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#define NFS_PROC_DEBUG
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#endif
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#include <linux/config.h>
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#include <linux/param.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/nfs_fs.h>
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#include <linux/utsname.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/in.h>
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#ifdef NFS_PROC_DEBUG
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static int proc_debug = 0;
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#define PRINTK(format, args...) \
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do { \
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if (proc_debug) \
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printk(format , ## args); \
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} while (0)
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#else /* !NFS_PROC_DEBUG */
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#define PRINTK(format, args...) do ; while (0)
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#endif /* !NFS_PROC_DEBUG */
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static int *nfs_rpc_header(int *p, int procedure);
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static int *nfs_rpc_verify(int *p);
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static int nfs_stat_to_errno(int stat);
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/*
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* Our memory allocation and release functions.
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*/
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static inline int *nfs_rpc_alloc(void)
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{
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return (int *) __get_free_page(GFP_KERNEL);
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}
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static inline void nfs_rpc_free(int *p)
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{
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free_page((long) p);
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}
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/*
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* Here are a bunch of xdr encode/decode functions that convert
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* between machine dependent and xdr data formats.
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*/
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static inline int *xdr_encode_fhandle(int *p, struct nfs_fh *fhandle)
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{
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*((struct nfs_fh *) p) = *fhandle;
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p += (sizeof (*fhandle) + 3) >> 2;
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return p;
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}
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static inline int *xdr_decode_fhandle(int *p, struct nfs_fh *fhandle)
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{
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*fhandle = *((struct nfs_fh *) p);
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p += (sizeof (*fhandle) + 3) >> 2;
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return p;
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}
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static inline int *xdr_encode_string(int *p, const char *string)
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{
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int len, quadlen;
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len = strlen(string);
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quadlen = (len + 3) >> 2;
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*p++ = htonl(len);
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memcpy((char *) p, string, len);
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memset(((char *) p) + len, '\0', (quadlen << 2) - len);
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p += quadlen;
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return p;
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}
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static inline int *xdr_decode_string(int *p, char *string, int maxlen)
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{
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unsigned int len;
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len = ntohl(*p++);
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if (len > maxlen)
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return NULL;
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memcpy(string, (char *) p, len);
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string[len] = '\0';
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p += (len + 3) >> 2;
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return p;
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}
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static inline int *xdr_encode_data(int *p, char *data, int len)
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{
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int quadlen;
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quadlen = (len + 3) >> 2;
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*p++ = htonl(len);
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memcpy((char *) p, data, len);
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memset(((char *) p) + len, '\0', (quadlen << 2) - len);
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p += quadlen;
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return p;
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}
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static inline int *xdr_decode_data(int *p, char *data, int *lenp, int maxlen)
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{
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unsigned int len;
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len = *lenp = ntohl(*p++);
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if (len > maxlen)
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return NULL;
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memcpy(data, (char *) p, len);
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p += (len + 3) >> 2;
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return p;
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}
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static int *xdr_decode_fattr(int *p, struct nfs_fattr *fattr)
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{
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fattr->type = (enum nfs_ftype) ntohl(*p++);
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fattr->mode = ntohl(*p++);
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fattr->nlink = ntohl(*p++);
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fattr->uid = ntohl(*p++);
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fattr->gid = ntohl(*p++);
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fattr->size = ntohl(*p++);
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fattr->blocksize = ntohl(*p++);
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fattr->rdev = ntohl(*p++);
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fattr->blocks = ntohl(*p++);
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fattr->fsid = ntohl(*p++);
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fattr->fileid = ntohl(*p++);
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fattr->atime.seconds = ntohl(*p++);
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fattr->atime.useconds = ntohl(*p++);
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fattr->mtime.seconds = ntohl(*p++);
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fattr->mtime.useconds = ntohl(*p++);
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fattr->ctime.seconds = ntohl(*p++);
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fattr->ctime.useconds = ntohl(*p++);
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return p;
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}
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static int *xdr_encode_sattr(int *p, struct nfs_sattr *sattr)
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{
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*p++ = htonl(sattr->mode);
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*p++ = htonl(sattr->uid);
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*p++ = htonl(sattr->gid);
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*p++ = htonl(sattr->size);
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*p++ = htonl(sattr->atime.seconds);
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*p++ = htonl(sattr->atime.useconds);
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*p++ = htonl(sattr->mtime.seconds);
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*p++ = htonl(sattr->mtime.useconds);
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return p;
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}
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static int *xdr_decode_entry(int *p, struct nfs_entry *entry)
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{
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entry->fileid = ntohl(*p++);
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if (!(p = xdr_decode_string(p, entry->name, NFS_MAXNAMLEN)))
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return NULL;
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entry->cookie = ntohl(*p++);
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entry->eof = 0;
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return p;
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}
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static int *xdr_decode_fsinfo(int *p, struct nfs_fsinfo *res)
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{
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res->tsize = ntohl(*p++);
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res->bsize = ntohl(*p++);
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res->blocks = ntohl(*p++);
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res->bfree = ntohl(*p++);
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res->bavail = ntohl(*p++);
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return p;
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}
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/*
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* One function for each procedure in the NFS protocol.
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*/
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int nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
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struct nfs_fattr *fattr)
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{
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int *p, *p0;
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int status;
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PRINTK("NFS call getattr\n");
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if (!(p0 = nfs_rpc_alloc()))
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return -EIO;
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p = nfs_rpc_header(p0, NFSPROC_GETATTR);
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p = xdr_encode_fhandle(p, fhandle);
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if ((status = nfs_rpc_call(server, p0, p)) < 0) {
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nfs_rpc_free(p0);
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return status;
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}
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if (!(p = nfs_rpc_verify(p0)))
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status = NFSERR_IO;
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else if ((status = ntohl(*p++)) == NFS_OK) {
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p = xdr_decode_fattr(p, fattr);
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PRINTK("NFS reply getattr\n");
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}
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else
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PRINTK("NFS reply getattr failed = %d\n", status);
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nfs_rpc_free(p0);
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return -nfs_stat_to_errno(status);
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}
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int nfs_proc_setattr(struct nfs_server *server, struct nfs_fh *fhandle,
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struct nfs_sattr *sattr, struct nfs_fattr *fattr)
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{
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int *p, *p0;
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int status;
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PRINTK("NFS call setattr\n");
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if (!(p0 = nfs_rpc_alloc()))
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return -EIO;
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p = nfs_rpc_header(p0, NFSPROC_SETATTR);
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p = xdr_encode_fhandle(p, fhandle);
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p = xdr_encode_sattr(p, sattr);
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if ((status = nfs_rpc_call(server, p0, p)) < 0) {
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nfs_rpc_free(p0);
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return status;
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}
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if (!(p = nfs_rpc_verify(p0)))
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status = NFSERR_IO;
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else if ((status = ntohl(*p++)) == NFS_OK) {
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p = xdr_decode_fattr(p, fattr);
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PRINTK("NFS reply setattr\n");
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}
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else
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PRINTK("NFS reply setattr failed = %d\n", status);
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nfs_rpc_free(p0);
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return -nfs_stat_to_errno(status);
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}
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int nfs_proc_lookup(struct nfs_server *server, struct nfs_fh *dir, const char *name,
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struct nfs_fh *fhandle, struct nfs_fattr *fattr)
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{
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int *p, *p0;
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int status;
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PRINTK("NFS call lookup %s\n", name);
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#ifdef NFS_PROC_DEBUG
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if (!strcmp(name, "xyzzy"))
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proc_debug = 1 - proc_debug;
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#endif
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if (!(p0 = nfs_rpc_alloc()))
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return -EIO;
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p = nfs_rpc_header(p0, NFSPROC_LOOKUP);
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p = xdr_encode_fhandle(p, dir);
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p = xdr_encode_string(p, name);
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if ((status = nfs_rpc_call(server, p0, p)) < 0) {
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nfs_rpc_free(p0);
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return status;
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}
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if (!(p = nfs_rpc_verify(p0)))
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status = NFSERR_IO;
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else if ((status = ntohl(*p++)) == NFS_OK) {
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p = xdr_decode_fhandle(p, fhandle);
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p = xdr_decode_fattr(p, fattr);
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PRINTK("NFS reply lookup\n");
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}
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else
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PRINTK("NFS reply lookup failed = %d\n", status);
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nfs_rpc_free(p0);
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return -nfs_stat_to_errno(status);
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}
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int nfs_proc_readlink(struct nfs_server *server, struct nfs_fh *fhandle,
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char *res)
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{
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int *p, *p0;
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int status;
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PRINTK("NFS call readlink\n");
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if (!(p0 = nfs_rpc_alloc()))
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return -EIO;
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p = nfs_rpc_header(p0, NFSPROC_READLINK);
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p = xdr_encode_fhandle(p, fhandle);
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if ((status = nfs_rpc_call(server, p0, p)) < 0) {
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nfs_rpc_free(p0);
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return status;
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}
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if (!(p = nfs_rpc_verify(p0)))
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status = NFSERR_IO;
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else if ((status = ntohl(*p++)) == NFS_OK) {
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if (!(p = xdr_decode_string(p, res, NFS_MAXPATHLEN))) {
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printk("nfs_proc_readlink: giant pathname\n");
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status = NFSERR_IO;
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}
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else
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PRINTK("NFS reply readlink %s\n", res);
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}
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else
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PRINTK("NFS reply readlink failed = %d\n", status);
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nfs_rpc_free(p0);
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return -nfs_stat_to_errno(status);
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}
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int nfs_proc_read(struct nfs_server *server, struct nfs_fh *fhandle,
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int offset, int count, char *data, struct nfs_fattr *fattr)
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{
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int *p, *p0;
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int status;
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int len = 0; /* = 0 is for gcc */
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PRINTK("NFS call read %d @ %d\n", count, offset);
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if (!(p0 = nfs_rpc_alloc()))
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return -EIO;
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p = nfs_rpc_header(p0, NFSPROC_READ);
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p = xdr_encode_fhandle(p, fhandle);
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*p++ = htonl(offset);
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*p++ = htonl(count);
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*p++ = htonl(count); /* traditional, could be any value */
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if ((status = nfs_rpc_call(server, p0, p)) < 0) {
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nfs_rpc_free(p0);
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return status;
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}
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if (!(p = nfs_rpc_verify(p0)))
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status = NFSERR_IO;
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else if ((status = ntohl(*p++)) == NFS_OK) {
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p = xdr_decode_fattr(p, fattr);
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if (!(p = xdr_decode_data(p, data, &len, count))) {
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printk("nfs_proc_read: giant data size\n");
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status = NFSERR_IO;
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}
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else
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PRINTK("NFS reply read %d\n", len);
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}
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else
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PRINTK("NFS reply read failed = %d\n", status);
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nfs_rpc_free(p0);
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return (status == NFS_OK) ? len : -nfs_stat_to_errno(status);
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}
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int nfs_proc_write(struct nfs_server *server, struct nfs_fh *fhandle,
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int offset, int count, char *data, struct nfs_fattr *fattr)
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{
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int *p, *p0;
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int status;
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PRINTK("NFS call write %d @ %d\n", count, offset);
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if (!(p0 = nfs_rpc_alloc()))
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return -EIO;
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p = nfs_rpc_header(p0, NFSPROC_WRITE);
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p = xdr_encode_fhandle(p, fhandle);
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*p++ = htonl(offset); /* traditional, could be any value */
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*p++ = htonl(offset);
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*p++ = htonl(count); /* traditional, could be any value */
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p = xdr_encode_data(p, data, count);
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if ((status = nfs_rpc_call(server, p0, p)) < 0) {
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nfs_rpc_free(p0);
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return status;
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}
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if (!(p = nfs_rpc_verify(p0)))
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status = NFSERR_IO;
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else if ((status = ntohl(*p++)) == NFS_OK) {
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p = xdr_decode_fattr(p, fattr);
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PRINTK("NFS reply write\n");
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}
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else
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PRINTK("NFS reply write failed = %d\n", status);
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nfs_rpc_free(p0);
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return -nfs_stat_to_errno(status);
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}
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int nfs_proc_create(struct nfs_server *server, struct nfs_fh *dir,
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const char *name, struct nfs_sattr *sattr,
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struct nfs_fh *fhandle, struct nfs_fattr *fattr)
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{
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int *p, *p0;
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int status;
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PRINTK("NFS call create %s\n", name);
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if (!(p0 = nfs_rpc_alloc()))
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return -EIO;
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p = nfs_rpc_header(p0, NFSPROC_CREATE);
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p = xdr_encode_fhandle(p, dir);
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p = xdr_encode_string(p, name);
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p = xdr_encode_sattr(p, sattr);
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if ((status = nfs_rpc_call(server, p0, p)) < 0) {
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nfs_rpc_free(p0);
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return status;
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}
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if (!(p = nfs_rpc_verify(p0)))
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status = NFSERR_IO;
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else if ((status = ntohl(*p++)) == NFS_OK) {
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p = xdr_decode_fhandle(p, fhandle);
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p = xdr_decode_fattr(p, fattr);
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PRINTK("NFS reply create\n");
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}
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else
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PRINTK("NFS reply create failed = %d\n", status);
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nfs_rpc_free(p0);
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return -nfs_stat_to_errno(status);
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}
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int nfs_proc_remove(struct nfs_server *server, struct nfs_fh *dir, const char *name)
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{
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int *p, *p0;
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int status;
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PRINTK("NFS call remove %s\n", name);
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if (!(p0 = nfs_rpc_alloc()))
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return -EIO;
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p = nfs_rpc_header(p0, NFSPROC_REMOVE);
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p = xdr_encode_fhandle(p, dir);
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p = xdr_encode_string(p, name);
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if ((status = nfs_rpc_call(server, p0, p)) < 0) {
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nfs_rpc_free(p0);
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return status;
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}
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if (!(p = nfs_rpc_verify(p0)))
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status = NFSERR_IO;
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else if ((status = ntohl(*p++)) == NFS_OK) {
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PRINTK("NFS reply remove\n");
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}
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else
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PRINTK("NFS reply remove failed = %d\n", status);
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nfs_rpc_free(p0);
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return -nfs_stat_to_errno(status);
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}
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int nfs_proc_rename(struct nfs_server *server,
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struct nfs_fh *old_dir, const char *old_name,
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struct nfs_fh *new_dir, const char *new_name)
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{
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int *p, *p0;
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int status;
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PRINTK("NFS call rename %s -> %s\n", old_name, new_name);
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if (!(p0 = nfs_rpc_alloc()))
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return -EIO;
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p = nfs_rpc_header(p0, NFSPROC_RENAME);
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p = xdr_encode_fhandle(p, old_dir);
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p = xdr_encode_string(p, old_name);
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p = xdr_encode_fhandle(p, new_dir);
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p = xdr_encode_string(p, new_name);
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if ((status = nfs_rpc_call(server, p0, p)) < 0) {
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nfs_rpc_free(p0);
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return status;
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}
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if (!(p = nfs_rpc_verify(p0)))
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status = NFSERR_IO;
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else if ((status = ntohl(*p++)) == NFS_OK) {
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PRINTK("NFS reply rename\n");
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}
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else
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PRINTK("NFS reply rename failed = %d\n", status);
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nfs_rpc_free(p0);
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return -nfs_stat_to_errno(status);
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}
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int nfs_proc_link(struct nfs_server *server, struct nfs_fh *fhandle,
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struct nfs_fh *dir, const char *name)
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{
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int *p, *p0;
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int status;
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PRINTK("NFS call link %s\n", name);
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if (!(p0 = nfs_rpc_alloc()))
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return -EIO;
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p = nfs_rpc_header(p0, NFSPROC_LINK);
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p = xdr_encode_fhandle(p, fhandle);
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p = xdr_encode_fhandle(p, dir);
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p = xdr_encode_string(p, name);
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if ((status = nfs_rpc_call(server, p0, p)) < 0) {
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nfs_rpc_free(p0);
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return status;
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}
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if (!(p = nfs_rpc_verify(p0)))
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status = NFSERR_IO;
|
|
else if ((status = ntohl(*p++)) == NFS_OK) {
|
|
PRINTK("NFS reply link\n");
|
|
}
|
|
else
|
|
PRINTK("NFS reply link failed = %d\n", status);
|
|
nfs_rpc_free(p0);
|
|
return -nfs_stat_to_errno(status);
|
|
}
|
|
|
|
int nfs_proc_symlink(struct nfs_server *server, struct nfs_fh *dir,
|
|
const char *name, const char *path, struct nfs_sattr *sattr)
|
|
{
|
|
int *p, *p0;
|
|
int status;
|
|
|
|
PRINTK("NFS call symlink %s -> %s\n", name, path);
|
|
if (!(p0 = nfs_rpc_alloc()))
|
|
return -EIO;
|
|
p = nfs_rpc_header(p0, NFSPROC_SYMLINK);
|
|
p = xdr_encode_fhandle(p, dir);
|
|
p = xdr_encode_string(p, name);
|
|
p = xdr_encode_string(p, path);
|
|
p = xdr_encode_sattr(p, sattr);
|
|
if ((status = nfs_rpc_call(server, p0, p)) < 0) {
|
|
nfs_rpc_free(p0);
|
|
return status;
|
|
}
|
|
if (!(p = nfs_rpc_verify(p0)))
|
|
status = NFSERR_IO;
|
|
else if ((status = ntohl(*p++)) == NFS_OK) {
|
|
PRINTK("NFS reply symlink\n");
|
|
}
|
|
else
|
|
PRINTK("NFS reply symlink failed = %d\n", status);
|
|
nfs_rpc_free(p0);
|
|
return -nfs_stat_to_errno(status);
|
|
}
|
|
|
|
int nfs_proc_mkdir(struct nfs_server *server, struct nfs_fh *dir,
|
|
const char *name, struct nfs_sattr *sattr,
|
|
struct nfs_fh *fhandle, struct nfs_fattr *fattr)
|
|
{
|
|
int *p, *p0;
|
|
int status;
|
|
|
|
PRINTK("NFS call mkdir %s\n", name);
|
|
if (!(p0 = nfs_rpc_alloc()))
|
|
return -EIO;
|
|
p = nfs_rpc_header(p0, NFSPROC_MKDIR);
|
|
p = xdr_encode_fhandle(p, dir);
|
|
p = xdr_encode_string(p, name);
|
|
p = xdr_encode_sattr(p, sattr);
|
|
if ((status = nfs_rpc_call(server, p0, p)) < 0) {
|
|
nfs_rpc_free(p0);
|
|
return status;
|
|
}
|
|
if (!(p = nfs_rpc_verify(p0)))
|
|
status = NFSERR_IO;
|
|
else if ((status = ntohl(*p++)) == NFS_OK) {
|
|
p = xdr_decode_fhandle(p, fhandle);
|
|
p = xdr_decode_fattr(p, fattr);
|
|
PRINTK("NFS reply mkdir\n");
|
|
}
|
|
else
|
|
PRINTK("NFS reply mkdir failed = %d\n", status);
|
|
nfs_rpc_free(p0);
|
|
return -nfs_stat_to_errno(status);
|
|
}
|
|
|
|
int nfs_proc_rmdir(struct nfs_server *server, struct nfs_fh *dir, const char *name)
|
|
{
|
|
int *p, *p0;
|
|
int status;
|
|
|
|
PRINTK("NFS call rmdir %s\n", name);
|
|
if (!(p0 = nfs_rpc_alloc()))
|
|
return -EIO;
|
|
p = nfs_rpc_header(p0, NFSPROC_RMDIR);
|
|
p = xdr_encode_fhandle(p, dir);
|
|
p = xdr_encode_string(p, name);
|
|
if ((status = nfs_rpc_call(server, p0, p)) < 0) {
|
|
nfs_rpc_free(p0);
|
|
return status;
|
|
}
|
|
if (!(p = nfs_rpc_verify(p0)))
|
|
status = NFSERR_IO;
|
|
else if ((status = ntohl(*p++)) == NFS_OK) {
|
|
PRINTK("NFS reply rmdir\n");
|
|
}
|
|
else
|
|
PRINTK("NFS reply rmdir failed = %d\n", status);
|
|
nfs_rpc_free(p0);
|
|
return -nfs_stat_to_errno(status);
|
|
}
|
|
|
|
int nfs_proc_readdir(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
int cookie, int count, struct nfs_entry *entry)
|
|
{
|
|
int *p, *p0;
|
|
int status;
|
|
int i = 0; /* = 0 is for gcc */
|
|
int size;
|
|
int eof;
|
|
|
|
PRINTK("NFS call readdir %d @ %d\n", count, cookie);
|
|
size = server->rsize;
|
|
if (!(p0 = nfs_rpc_alloc()))
|
|
return -EIO;
|
|
p = nfs_rpc_header(p0, NFSPROC_READDIR);
|
|
p = xdr_encode_fhandle(p, fhandle);
|
|
*p++ = htonl(cookie);
|
|
*p++ = htonl(size);
|
|
if ((status = nfs_rpc_call(server, p0, p)) < 0) {
|
|
nfs_rpc_free(p0);
|
|
return status;
|
|
}
|
|
if (!(p = nfs_rpc_verify(p0)))
|
|
status = NFSERR_IO;
|
|
else if ((status = ntohl(*p++)) == NFS_OK) {
|
|
for (i = 0; i < count && *p++; i++) {
|
|
if (!(p = xdr_decode_entry(p, entry++)))
|
|
break;
|
|
}
|
|
if (!p) {
|
|
printk("nfs_proc_readdir: giant filename\n");
|
|
status = NFSERR_IO;
|
|
}
|
|
else {
|
|
eof = (i == count && !*p++ && *p++)
|
|
|| (i < count && *p++);
|
|
if (eof && i)
|
|
entry[-1].eof = 1;
|
|
PRINTK("NFS reply readdir %d %s\n", i,
|
|
eof ? "eof" : "");
|
|
}
|
|
}
|
|
else
|
|
PRINTK("NFS reply readdir failed = %d\n", status);
|
|
nfs_rpc_free(p0);
|
|
return (status == NFS_OK) ? i : -nfs_stat_to_errno(status);
|
|
}
|
|
|
|
int nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *res)
|
|
{
|
|
int *p, *p0;
|
|
int status;
|
|
|
|
PRINTK("NFS call statfs\n");
|
|
if (!(p0 = nfs_rpc_alloc()))
|
|
return -EIO;
|
|
p = nfs_rpc_header(p0, NFSPROC_STATFS);
|
|
p = xdr_encode_fhandle(p, fhandle);
|
|
if ((status = nfs_rpc_call(server, p0, p)) < 0) {
|
|
nfs_rpc_free(p0);
|
|
return status;
|
|
}
|
|
if (!(p = nfs_rpc_verify(p0)))
|
|
status = NFSERR_IO;
|
|
else if ((status = ntohl(*p++)) == NFS_OK) {
|
|
p = xdr_decode_fsinfo(p, res);
|
|
PRINTK("NFS reply statfs\n");
|
|
}
|
|
else
|
|
PRINTK("NFS reply statfs failed = %d\n", status);
|
|
nfs_rpc_free(p0);
|
|
return -nfs_stat_to_errno(status);
|
|
}
|
|
|
|
/*
|
|
* Here are a few RPC-assist functions.
|
|
*/
|
|
|
|
static int *nfs_rpc_header(int *p, int procedure)
|
|
{
|
|
int *p1, *p2;
|
|
int i;
|
|
static int xid = 0;
|
|
unsigned char *sys = (unsigned char *) system_utsname.nodename;
|
|
|
|
if (xid == 0) {
|
|
xid = CURRENT_TIME;
|
|
xid ^= (sys[3]<<24) | (sys[2]<<16) | (sys[1]<<8) | sys[0];
|
|
}
|
|
*p++ = htonl(++xid);
|
|
*p++ = htonl(RPC_CALL);
|
|
*p++ = htonl(RPC_VERSION);
|
|
*p++ = htonl(NFS_PROGRAM);
|
|
*p++ = htonl(NFS_VERSION);
|
|
*p++ = htonl(procedure);
|
|
*p++ = htonl(RPC_AUTH_UNIX);
|
|
p1 = p++;
|
|
*p++ = htonl(CURRENT_TIME); /* traditional, could be anything */
|
|
p = xdr_encode_string(p, (char *) sys);
|
|
*p++ = htonl(current->euid);
|
|
*p++ = htonl(current->egid);
|
|
p2 = p++;
|
|
for (i = 0; i < 16 && i < NGROUPS && current->groups[i] != NOGROUP; i++)
|
|
*p++ = htonl(current->groups[i]);
|
|
*p2 = htonl(i);
|
|
*p1 = htonl((p - (p1 + 1)) << 2);
|
|
*p++ = htonl(RPC_AUTH_NULL);
|
|
*p++ = htonl(0);
|
|
return p;
|
|
}
|
|
|
|
static int *nfs_rpc_verify(int *p)
|
|
{
|
|
unsigned int n;
|
|
|
|
p++;
|
|
if ((n = ntohl(*p++)) != RPC_REPLY) {
|
|
printk("nfs_rpc_verify: not an RPC reply: %d\n", n);
|
|
return NULL;
|
|
}
|
|
if ((n = ntohl(*p++)) != RPC_MSG_ACCEPTED) {
|
|
printk("nfs_rpc_verify: RPC call rejected: %d\n", n);
|
|
return NULL;
|
|
}
|
|
switch (n = ntohl(*p++)) {
|
|
case RPC_AUTH_NULL: case RPC_AUTH_UNIX: case RPC_AUTH_SHORT:
|
|
break;
|
|
default:
|
|
printk("nfs_rpc_verify: bad RPC authentication type: %d\n", n);
|
|
return NULL;
|
|
}
|
|
if ((n = ntohl(*p++)) > 400) {
|
|
printk("nfs_rpc_verify: giant auth size\n");
|
|
return NULL;
|
|
}
|
|
p += (n + 3) >> 2;
|
|
if ((n = ntohl(*p++)) != RPC_SUCCESS) {
|
|
printk("nfs_rpc_verify: RPC call failed: %d\n", n);
|
|
return NULL;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
* We need to translate between nfs status return values and
|
|
* the local errno values which may not be the same.
|
|
*/
|
|
|
|
#ifndef EDQUOT
|
|
#define EDQUOT ENOSPC
|
|
#endif
|
|
|
|
static struct {
|
|
int stat;
|
|
int errno;
|
|
} nfs_errtbl[] = {
|
|
{ NFS_OK, 0 },
|
|
{ NFSERR_PERM, EPERM },
|
|
{ NFSERR_NOENT, ENOENT },
|
|
{ NFSERR_IO, EIO },
|
|
{ NFSERR_NXIO, ENXIO },
|
|
{ NFSERR_ACCES, EACCES },
|
|
{ NFSERR_EXIST, EEXIST },
|
|
{ NFSERR_NODEV, ENODEV },
|
|
{ NFSERR_NOTDIR, ENOTDIR },
|
|
{ NFSERR_ISDIR, EISDIR },
|
|
{ NFSERR_INVAL, EINVAL },
|
|
{ NFSERR_FBIG, EFBIG },
|
|
{ NFSERR_NOSPC, ENOSPC },
|
|
{ NFSERR_ROFS, EROFS },
|
|
{ NFSERR_NAMETOOLONG, ENAMETOOLONG },
|
|
{ NFSERR_NOTEMPTY, ENOTEMPTY },
|
|
{ NFSERR_DQUOT, EDQUOT },
|
|
{ NFSERR_STALE, ESTALE },
|
|
#ifdef EWFLUSH
|
|
{ NFSERR_WFLUSH, EWFLUSH },
|
|
#endif
|
|
{ -1, EIO }
|
|
};
|
|
|
|
static int nfs_stat_to_errno(int stat)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; nfs_errtbl[i].stat != -1; i++) {
|
|
if (nfs_errtbl[i].stat == stat)
|
|
return nfs_errtbl[i].errno;
|
|
}
|
|
printk("nfs_stat_to_errno: bad nfs status return value: %d\n", stat);
|
|
return nfs_errtbl[i].errno;
|
|
}
|
|
|