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nuttx-bb/nuttx/fs/nfs/nfs_vfsops.c

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/****************************************************************************
* fs/nfs/nfs_vfsops.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Copyright (C) 2012 Jose Pablo Rojas Vargas. All rights reserved.
* Author: Jose Pablo Rojas Vargas <jrojas@nx-engineering.com>
*
* Leveraged from OpenBSD:
*
* Copyright (c) 1989, 1993, 1995
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/socket.h>
#include <sys/statfs.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdlib.h>
#include <queue.h>
#include <string.h>
#include <fcntl.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <time.h>
#include <nuttx/kmalloc.h>
#include <nuttx/fs/dirent.h>
#include <nuttx/fs/fs.h>
#include <nuttx/fs/nfs.h>
#include <semaphore.h>
#include <net/if.h>
#include <netinet/in.h>
#include "nfs.h"
#include "rpc.h"
#include "nfs_proto.h"
#include "nfs_node.h"
#include "nfs_mount.h"
#include "xdr_subs.h"
#include "nfs_socket.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define NFS_DIRHDSIZ (sizeof (struct nfs_dirent) - (MAXNAMLEN + 1))
#define NFS_DIRENT_OVERHEAD offsetof(struct nfs_dirent, dirent)
/* include/nuttx/fs/dirent.h has its own version of these lengths. They must
* match the NFS versions.
*/
#if NFSX_V2FH != DIRENT_NFS_MAXHANDLE
# error "Length of file handle in fs_dirent_s is incorrect"
#endif
#if NFSX_V3COOKIEVERF != DIRENT_NFS_VERFLEN
# error "Length of cookie verify in fs_dirent_s is incorrect"
#endif
/****************************************************************************
* Private Type Definitions
****************************************************************************/
struct nfs_dirent
{
uint32_t cookie[2];
struct dirent dirent;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int nfs_create(FAR struct nfsmount *nmp, struct nfsnode *np,
FAR const char *relpath, mode_t mode);
static int nfs_open(FAR struct file *filep, const char *relpath,
int oflags, mode_t mode);
static ssize_t nfs_read(FAR struct file *filep, char *buffer, size_t buflen);
static ssize_t nfs_write(FAR struct file *filep, const char *buffer,
size_t buflen);
static int nfs_opendir(struct inode *mountpt, const char *relpath,
struct fs_dirent_s *dir);
static int nfs_readdir(struct inode *mountpt, struct fs_dirent_s *dir);
static int nfs_bind(FAR struct inode *blkdriver, const void *data,
void **handle);
static int nfs_unbind(void *handle, FAR struct inode **blkdriver);
static int nfs_statfs(struct inode *mountpt, struct statfs *buf);
static int nfs_remove(struct inode *mountpt, const char *relpath);
static int nfs_mkdir(struct inode *mountpt, const char *relpath,
mode_t mode);
static int nfs_rmdir(struct inode *mountpt, const char *relpath);
static int nfs_rename(struct inode *mountpt, const char *oldrelpath,
const char *newrelpath);
static int nfs_getstat(struct nfsmount *nmp, const char *relpath,
struct stat *buf);
static int nfs_stat(struct inode *mountpt, const char *relpath,
struct stat *buf);
/****************************************************************************
* Public Data
****************************************************************************/
/* nfs vfs operations. */
const struct mountpt_operations nfs_operations =
{
nfs_open, /* open */
NULL, /* close */
nfs_read, /* read */
nfs_write, /* write */
NULL, /* seek */
NULL, /* ioctl */
NULL, /* sync */
nfs_opendir, /* opendir */
NULL, /* closedir */
nfs_readdir, /* readdir */
NULL, /* rewinddir */
nfs_bind, /* bind */
nfs_unbind, /* unbind */
nfs_statfs, /* statfs */
nfs_remove, /* unlink */
nfs_mkdir, /* mkdir */
nfs_rmdir, /* rmdir */
nfs_rename, /* rename */
nfs_stat /* stat */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nfs_create
*
* Description:
* Create a file. This is part of the file open logic that is executed if
* the user asks to create a file.
*
* Returned Value:
* 0 on success; a positive errno value on failure.
*
****************************************************************************/
static int nfs_create(FAR struct nfsmount *nmp, struct nfsnode *np,
FAR const char *relpath, mode_t mode)
{
//struct nfs_fattr vap;
struct nfsv3_sattr sp;
struct CREATE3args create;
struct rpc_reply_create resok;
int error = 0;
do
{
nfsstats.rpccnt[NFSPROC_CREATE]++;
memset(&sp, 0, sizeof(struct nfsv3_sattr));
//memset(&vap, 0, sizeof(struct nfs_fattr));
//vap = nmp->nm_head->n_fattr;
sp.sa_modetrue = true;
sp.sa_mode = txdr_unsigned(mode);
sp.sa_uidfalse = nfs_xdrneg1;
sp.sa_gidfalse = nfs_xdrneg1;
sp.sa_sizefalse = 0;
sp.sa_atimetype = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
sp.sa_mtimetype = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
//txdr_nfsv3time2(&vap.fa3_atime, &sp.sa_atime);
//txdr_nfsv3time2(&vap.fa3_mtime, &sp.sa_mtime);
memset(&create, 0, sizeof(struct CREATE3args));
memset(&resok, 0, sizeof(struct rpc_reply_create));
memcpy(&create.how, &sp, sizeof(struct nfsv3_sattr));
#warning "BUG HERE: np has not yet been initialized"
create.where.dir.length = txdr_unsigned(np->n_fhsize);
memcpy(&create.where.dir.handle, &np->n_fhp, sizeof(nfsfh_t));
create.where.length = txdr_unsigned(64);
strncpy(create.where.name, relpath, 64);
error = nfs_request(nmp, NFSPROC_CREATE,
(FAR const void *)&create, sizeof(struct CREATE3args),
(FAR void *)&resok, sizeof(struct rpc_reply_create));
}
while (error == EOPNOTSUPP);
if (error == 0)
{
//np->nfsv3_type = fxdr_unsigned(uint32_t, resok.attributes.fa_type);
np->n_open = true;
memcpy(&np->n_fhp, &resok.create.fshandle.handle, sizeof(nfsfh_t));
np->n_size = fxdr_hyper(&resok.create.attributes.fa3_size);
memcpy(&resok.create.attributes, &np->n_fattr, sizeof(struct nfs_fattr));
fxdr_nfsv3time(&resok.create.attributes.fa3_mtime, &np->n_mtime)
np->n_ctime = fxdr_hyper(&resok.create.attributes.fa3_ctime);
}
return error;
}
/****************************************************************************
* Name: nfs_open
*
* Description:
* If oflags == O_CREAT it creates a file, if not it check to see if the
* type is ok and that deletion is not in progress.
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
static int nfs_open(FAR struct file *filep, FAR const char *relpath,
int oflags, mode_t mode)
{
struct stat buf;
struct inode *in;
//struct nfs_fattr vap;
struct nfsmount *nmp;
struct nfsnode *np;
bool readonly;
int error = 0;
/* Sanity checks */
DEBUGASSERT(filep->f_inode != NULL);
/* Get the mountpoint inode reference from the file structure and the
* mountpoint private data from the inode structure
*/
in = filep->f_inode;
nmp = (struct nfsmount*)in->i_private;
DEBUGASSERT(nmp != NULL);
/* Pre-allocate the file private data to describe the opened file. */
np = (struct nfsnode *)kzalloc(sizeof(struct nfsnode));
if (!np)
{
fdbg("ERROR: Failed to allocate private data\n");
return -ENOMEM;
}
/* Check if the mount is still healthy */
nfs_semtake(nmp);
error = nfs_checkmount(nmp);
if (error != 0)
{
goto errout_with_semaphore;
}
/* First check if the file already exists */
error = nfs_getstat(nmp, relpath, &buf);
if (error == 0)
{
/* Check if the file is a directory */
if (S_ISDIR(buf.st_mode))
{
/* Exit with EISDIR if we attempt to open an directory */
fdbg("ERROR: Path is a directory\n");
error = EISDIR;
goto errout_with_semaphore;
}
/* Check if the caller has sufficient privileges to open the file */
readonly = ((buf.st_mode & (S_IWOTH|S_IWGRP|S_IXUSR)) == 0);
if (((oflags & O_WRONLY) != 0) && readonly)
{
fdbg("ERROR: File is read-only\n");
error = EACCES;
goto errout_with_semaphore;
}
/* It would be an error if we are asked to create it exclusively */
if ((oflags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL))
{
/* Already exists -- can't create it exclusively */
fdbg("ERROR: File exists\n");
error = EEXIST;
goto errout_with_semaphore;
}
/* If O_TRUNC is specified and the file is opened for writing,
* then truncate the file. This operation requires that the file is
* writable, but we have already checked that. O_TRUNC without write
* access is ignored.
*/
if ((oflags & (O_TRUNC|O_WRONLY)) == (O_TRUNC|O_WRONLY))
{
/* Truncate the file to zero length */
fvdbg("Truncating file\n");
#warning "Missing logic"
}
/* Initialize the file private data from the FSINFO return data */
/* NOTE: This will require some re-structuring */
#if 0
np->n_open = true;
memcpy(&np->n_fhp, &resok.fsinfo.fshandle.handle, sizeof(nfsfh_t));
np->n_size = fxdr_hyper(&resok.fsinfo.attributes.fa3_size);
memcpy(&resok.fsinfo.attributes, &np->n_fattr, sizeof(struct nfs_fattr));
fxdr_nfsv3time(&resok.fsinfo.attributes.fa3_mtime, &np->n_mtime)
np->n_ctime = fxdr_hyper(&resok.fsinfo.attributes.fa3_ctime);
#else
#warning "Missing logic"
fdbg("ERROR: Logic to open an existing file is not fully implemented");
errno = ENOSYS; /* Just fail for now */
goto errout_with_semaphore;
#endif
/* Fall through to finish the file open operation */
}
/* An error occurred while getting the file status. Check if the stat failed
* because the file does not exist. That is not necessarily an error; that
* may only mean that we have to create the file.
*/
else if (error != ENOENT)
{
fdbg("ERROR: nfs_getstat failed: %d\n", error);
goto errout_with_semaphore;
}
/* The file does not exist. Check if we were asked to create the file. If
* the O_CREAT bit is set in the oflags then we should create the file if it
* does not exist.
*/
else if ((oflags & O_CREAT) == 0)
{
/* Return ENOENT if the file does not exist and we were not asked
* to create it.
*/
fdbg("ERROR: File does not exist\n");
error = ENOENT;
goto errout_with_semaphore;
}
/* Create the file */
else
{
error = nfs_create(nmp, np, relpath, mode);
if (error != 0)
{
fdbg("ERROR: nfs_create failed: %d\n", error);
goto errout_with_semaphore;
}
/* Fall through to finish the file open operation */
}
/* Initialize the file private data (only need to initialize
* non-zero elements)
*/
/* Attach the private data to the struct file instance */
filep->f_priv = np;
/* Then insert the new instance into the mountpoint structure.
* It needs to be there (1) to handle error conditions that effect
* all files, and (2) to inform the umount logic that we are busy
* (but a simple reference count could have done that).
*/
np->n_next = nmp->nm_head;
np->n_flag |= NMODIFIED;
nmp->nm_head = np->n_next;
/* For open/close consistency. */
NFS_INVALIDATE_ATTRCACHE(np);
nfs_semgive(nmp);
return OK;
errout_with_semaphore:
kfree(np);
nfs_semgive(nmp);
return -error;
}
#undef COMP
#ifdef COMP
/****************************************************************************
* Name: nfs_close
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
static int nfs_close(FAR struct file *filep) done
{
struct nfsmount *nmp;
struct nfsnode *np;
int error = 0;
fvdbg("Closing\n");
/* Sanity checks */
DEBUGASSERT(filep->f_priv != NULL && filep->f_inode != NULL);
/* Recover our private data from the struct file instance */
np = filep->f_priv;
nmp = filep->f_inode->i_private;
DEBUGASSERT(nmp != NULL);
if (np->nfsv3_type == NFREG)
{
error = nfs_sync(filep);
kfree(np);
filep->f_priv = NULL;
}
return -error;
}
#endif
/****************************************************************************
* Name: nfs_read
*
* Returned Value:
* The (non-negative) number of bytes read on success; a negated errno
* value on failure.
*
****************************************************************************/
static ssize_t nfs_read(FAR struct file *filep, char *buffer, size_t buflen)
{
struct nfsmount *nmp;
struct nfsnode *np;
uint32_t readsize;
int bytesleft;
uint64_t offset;
struct READ3args read;
struct rpc_reply_read resok;
uint8_t *userbuffer = (uint8_t*)buffer;
int error = 0;
int len;
fvdbg("Read %d bytes from offset %d\n", buflen, filep->f_pos);
/* Sanity checks */
DEBUGASSERT(filep->f_priv != NULL && filep->f_inode != NULL);
/* Recover our private data from the struct file instance */
np = (struct nfsnode*) filep->f_priv;
nmp = (struct nfsmount*) filep->f_inode->i_private;
offset = 0;
DEBUGASSERT(nmp != NULL);
/* Make sure that the mount is still healthy */
nfs_semtake(nmp);
error = nfs_checkmount(nmp);
if (error != 0)
{
fdbg("nfs_checkmount failed: %d\n", error);
goto errout_with_semaphore;
}
if (np->nfsv3_type != NFREG)
{
fdbg("read eacces typ=%d\n", np->nfsv3_type);
error = EACCES;
goto errout_with_semaphore;
}
if ((nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_GOTFSINFO)) == NFSMNT_NFSV3)
{
(void)nfs_fsinfo(nmp);
}
/* Get the number of bytes left in the file */
bytesleft = np->n_size - filep->f_pos;
readsize = 0;
/* Truncate read count so that it does not exceed the number
* of bytes left in the file.
*/
if (buflen > bytesleft)
{
buflen = bytesleft;
}
len = nmp->nm_rsize;
if (len < buflen)
{
error = EFBIG;
goto errout_with_semaphore;
}
nfsstats.rpccnt[NFSPROC_READ]++;
again:
memset(&read, 0, sizeof(struct READ3args));
memset(&resok, 0, sizeof(struct rpc_reply_read));
read.file = txdr_unsigned(np->nfsv3_type);
read.count = txdr_unsigned(buflen);
read.offset = txdr_unsigned(offset);
error = nfs_request(nmp, NFSPROC_READ,
(FAR const void *)&read, sizeof(struct READ3args),
(FAR void *)&resok, sizeof(struct rpc_reply_read));
if (error)
{
goto errout_with_semaphore;
}
if (resok.read.eof == true)
{
readsize = fxdr_unsigned(uint32_t, resok.read.count);
np->n_fattr = resok.read.file_attributes;//
memcpy(userbuffer, resok.read.data, readsize);
}
else
{
goto again;
}
nfs_semgive(nmp);
return readsize;
errout_with_semaphore:
nfs_semgive(nmp);
return -error;
}
/****************************************************************************
* Name: nfs_write
*
* Returned Value:
* The (non-negative) number of bytes written on success; a negated errno
* value on failure.
*
****************************************************************************/
static ssize_t nfs_write(FAR struct file *filep, const char *buffer,
size_t buflen)
{
struct inode *inode;
struct nfsmount *nmp;
struct nfsnode *np;
unsigned int writesize;
struct WRITE3args write;
struct rpc_reply_write resok;
uint8_t *userbuffer = (uint8_t*)buffer;
int error = 0;
uint64_t offset;
int len;
int commit = 0;
int committed = NFSV3WRITE_FILESYNC;
/* Sanity checks */
DEBUGASSERT(filep->f_priv != NULL && filep->f_inode != NULL);
/* Recover our private data from the struct file instance */
np = (struct nfsnode *)filep->f_priv;
inode = filep->f_inode;
nmp = (struct nfsmount *)inode->i_private;
offset = 0;
DEBUGASSERT(nmp != NULL);
/* Make sure that the mount is still healthy */
nfs_semtake(nmp);
error = nfs_checkmount(nmp);
if (error != 0)
{
goto errout_with_semaphore;
}
/* Check if the file size would exceed the range of off_t */
if (np->n_size + buflen < np->n_size)
{
error = EFBIG;
goto errout_with_semaphore;
}
len = nmp->nm_wsize;
if (len < buflen)
{
error = EFBIG;
goto errout_with_semaphore;
}
writesize = 0;
nfsstats.rpccnt[NFSPROC_WRITE]++;
memset(&write, 0, sizeof(struct WRITE3args));
memset(&resok, 0, sizeof(struct rpc_reply_write));
write.file = txdr_unsigned(np->nfsv3_type);
write.offset = txdr_unsigned(offset);
write.count = txdr_unsigned(buflen);
write.stable = txdr_unsigned(committed);
memcpy((void *)write.data, userbuffer, buflen);
error = nfs_request(nmp, NFSPROC_WRITE,
(FAR const void *)&write, sizeof(struct WRITE3args),
(FAR void *)&resok, sizeof(struct rpc_reply_write));
if (error)
{
goto errout_with_semaphore;
}
writesize = resok.write.count;
if (writesize == 0)
{
error = EIO;
goto errout_with_semaphore;
}
commit = resok.write.committed;
memcpy(&np->n_fattr, &resok.write.file_wcc.after, sizeof(struct nfs_fattr));
/* Return the lowest committment level obtained by any of the RPCs. */
if (committed == NFSV3WRITE_FILESYNC)
{
committed = commit;
}
else if (committed == NFSV3WRITE_DATASYNC &&
commit == NFSV3WRITE_UNSTABLE)
{
committed = commit;
}
if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0)
{
memcpy((void*) nmp->nm_verf, (void*) resok.write.verf, NFSX_V3WRITEVERF);
nmp->nm_flag |= NFSMNT_HASWRITEVERF;
}
else if (strncmp((char*) resok.write.verf, (char*) nmp->nm_verf, NFSX_V3WRITEVERF))
{
memcpy((void*) nmp->nm_verf, (void*) resok.write.verf, NFSX_V3WRITEVERF);
}
fxdr_nfsv3time(&np->n_fattr.fa3_mtime, &np->n_mtime)
nfs_semgive(nmp);
return writesize;
errout_with_semaphore:
nfs_semgive(nmp);
return -error;
}
/****************************************************************************
* Name: nfs_opendir
*
* Description:
* Open a directory for read access
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
static int nfs_opendir(struct inode *mountpt, const char *relpath,
struct fs_dirent_s *dir)
{
struct nfsmount *nmp;
struct file_handle fhandle;
struct nfs_fattr obj_attributes;
uint32_t objtype;
int error;
fvdbg("relpath: \"%s\"\n", relpath ? relpath : "NULL");
/* Sanity checks */
DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL && dir);
/* Recover our private data from the inode instance */
nmp = mountpt->i_private;
/* Initialize the NFS-specific portions of dirent structure to zero */
memset(&dir->u.nfs, 0, sizeof(struct nfsdir_s));
/* Make sure that the mount is still healthy */
nfs_semtake(nmp);
error = nfs_checkmount(nmp);
if (error != OK)
{
fdbg("ERROR: nfs_checkmount failed: %d\n", error);
goto errout_with_semaphore;
}
/* Find the NFS node associate with the path */
error = nfs_findnode(nmp, relpath, &fhandle, &obj_attributes, NULL);
if (error != 0)
{
fdbg("ERROR: nfs_findnode failed: %d\n", error);
goto errout_with_semaphore;
}
/* The entry is a directory */
objtype = fxdr_unsigned(uint32_t, obj_attributes.fa_type);
if (objtype != NFDIR)
{
fdbg("ERROR: Not a directory, type=%d\n", objtype);
error = ENOTDIR;
goto errout_with_semaphore;
}
/* Save the directory information in struct fs_dirent_s so that it can be
* used later when readdir() is called.
*/
dir->u.nfs.nfs_fhsize = (uint8_t)fhandle.length;
DEBUGASSERT(fhandle.length <= DIRENT_NFS_MAXHANDLE);
memcpy(dir->u.nfs.nfs_fhandle, &fhandle.handle, DIRENT_NFS_MAXHANDLE);
error = OK;
errout_with_semaphore:
nfs_semgive(nmp);
return -error;
}
/****************************************************************************
* Name: nfs_readdir
*
* Description: Read from directory
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
static int nfs_readdir(struct inode *mountpt, struct fs_dirent_s *dir)
{
struct nfsmount *nmp;
uint32_t buffer[64]; /* Needs to go into struct fs_dirent_s nuttx/dirent.h */
struct READDIR3args rddir;
struct rpc_reply_readdir *resok;
struct file_handle fhandle;
struct nfs_fattr obj_attributes;
uint32_t tmp;
uint32_t *ptr;
uint8_t *name;
unsigned int length;
bool more;
bool eod;
int reqlen;
int error = 0;
fvdbg("Entry\n");
/* Sanity checks */
DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL);
/* Recover our private data from the inode instance */
nmp = mountpt->i_private;
/* Make sure that the mount is still healthy */
nfs_semtake(nmp);
error = nfs_checkmount(nmp);
if (error != 0)
{
fdbg("ERROR: nfs_checkmount failed: %d\n", error);
goto errout_with_semaphore;
}
/* Check in 'dir' if we are have directories entries?
* 1) have data, and
* 2) Index of the last returned entry has nextentry != 0
*
* If we have returned entries then read more entries if:
* 3) EOF = 0
*/
more = false; /* Set 'more' to true if we have buffered entries to be processed */
eod = false; /* Set 'eod' if we are at the end of the directory */
/* Loop while we need more data (!more) and we are not at the end of
* the directory (!eod)
*/
while (!more && !eod)
{
/* Request a block directory entries, copying directory information from
* the dirent structure.
*/
memset(&rddir, 0, sizeof(struct READDIR3args));
/* Initialize the request */
ptr = (FAR uint32_t*)&rddir;
reqlen = 0;
/* Copy the variable length, directory file handle */
*ptr++ = txdr_unsigned((uint32_t)dir->u.nfs.nfs_fhsize);
reqlen += sizeof(uint32_t);
memcpy(ptr, dir->u.nfs.nfs_fhandle, dir->u.nfs.nfs_fhsize);
reqlen += (int)dir->u.nfs.nfs_fhsize;
ptr += uint32_increment((int)dir->u.nfs.nfs_fhsize);
/* Cookie and cookie verifier */
ptr[0] = dir->u.nfs.nfs_cookie[0];
ptr[1] = dir->u.nfs.nfs_cookie[1];
ptr += 2;
reqlen += 2*sizeof(uint32_t);
memcpy(ptr, dir->u.nfs.nfs_verifier, DIRENT_NFS_VERFLEN);
ptr += uint32_increment(DIRENT_NFS_VERFLEN);
reqlen += DIRENT_NFS_VERFLEN;
/* Number of directory entries (We currently only process one entry at a time) */
*ptr = txdr_unsigned(nmp->nm_readdirsize);
reqlen += sizeof(uint32_t);
/* And read the directory */
nfsstats.rpccnt[NFSPROC_READDIR]++;
error = nfs_request(nmp, NFSPROC_READDIR,
(FAR const void *)&rddir, reqlen,
(FAR void *)buffer, sizeof(buffer));
if (error != 0)
{
fdbg("ERROR: nfs_request failed: %d\n", error);
goto errout_with_semaphore;
}
/* A new group of entries was successfully read. Process the
* information contained in the response header. This information
* includes:
*
* 1) Attributes follow indication - 4 bytes
* 2) Directory attributes - sizeof(struct nfs_fattr)
* 3) Cookie verifier - NFSX_V3COOKIEVERF bytes
* 4) Values follows indication - 4 bytes
*/
resok = (struct rpc_reply_readdir *)buffer;
/* Start with the first entry */
ptr = (uint32_t*)&resok->readdir;
/* Check if attributes follow, if 0 so Skip over the attributes */
if (resok->readdir.attributes_follow == 1)
{
/* Attributes are not currently used */
}
#warning "Won't the structure format be wrong if there are no attributes -- this will need to be parsed too"
/* Save the verification cookie */
memcpy(dir->u.nfs.nfs_verifier, &resok->readdir.cookieverf, DIRENT_NFS_VERFLEN);
/* Get a pointer to the diretory entries (if any) */
ptr = (uint32_t*)&resok->readdir.reply;
/* Check if values follow. If no values follow, then the EOF indication
* will appear next.
*/
if (resok->readdir.value_follows == 0)
{
/* No values follow, then the reply should consist only of a 4-byte
* end-of-directory indication.
*/
more = false; /* No entries follow */
eod = (*ptr != 0); /* We are (probably) at the end of the directory */
}
else
{
more = true; /* Assume that entries follow */
eod = false; /* Assume that we are not at the end of the directory */
}
}
/* If we are not at the end of the directory listing, then a set of entries
* will follow the header. Each entry is of the form:
*
* File ID (8 bytes)
* Name length (4 bytes)
* Name string (varaiable size but in multiples of 4 bytes)
* Cookie (8 bytes)
* next entry (4 bytes)
*
* If 'more' is true, then we have more directory entries to process.
*/
if (more)
{
/* There is an entry. Get the file ID and point to the length */
/* Missing logic to get the file ID */
ptr += 2;
/* Get the length and point to the name */
tmp = *ptr++;
length = fxdr_unsigned(uint32_t, tmp);
name = (uint8_t*)ptr;
/* Increment the pointer past the name (allowing for padding). ptr
* now points to the cookie.
*/
ptr += uint32_increment(length);
/* Save the cookie and increment the pointer to the next entry */
dir->u.nfs.nfs_cookie[0] = *ptr++;
dir->u.nfs.nfs_cookie[1] = *ptr++;
ptr++; /* Just skip over the nextentry for now */
/* Return the name of the node to the caller */
if (length > NAME_MAX)
{
length = NAME_MAX;
}
memcpy(dir->fd_dir.d_name, name, length);
dir->fd_dir.d_name[length] = '\0';
fvdbg("name: \"%s\"\n", dir->fd_dir.d_name);
/* Get the file attributes associated with this name and return
* the file type.
*/
fhandle.length = (uint32_t)dir->u.nfs.nfs_fhsize;
memcpy(&fhandle.handle, dir->u.nfs.nfs_fhandle, DIRENT_NFS_MAXHANDLE);
error = nfs_lookup(nmp, dir->fd_dir.d_name, &fhandle, &obj_attributes, NULL);
if (error != 0)
{
fdbg("nfs_lookup failed: %d\n", error);
goto errout_with_semaphore;
}
/* Set the dirent file type */
tmp = fxdr_unsigned(uint32_t, obj_attributes.fa_type);
switch (tmp)
{
default:
case NFNON: /* Unknown type */
case NFSOCK: /* Socket */
case NFLNK: /* Symbolic link */
break;
case NFREG: /* Regular file */
dir->fd_dir.d_type = DTYPE_FILE;
break;
case NFDIR: /* Directory */
dir->fd_dir.d_type = DTYPE_DIRECTORY;
break;
case NFBLK: /* Block special device file */
dir->fd_dir.d_type = DTYPE_BLK;
break;
case NFFIFO: /* Named FIFO */
case NFCHR: /* Character special device file */
dir->fd_dir.d_type = DTYPE_CHR;
break;
}
fvdbg("type: %d->%d\n", (int)tmp, dir->fd_dir.d_type);
}
/* We are at the end of the directory. If 'eod' is true then we all of the
* directory entries have been processed and we are at the end of the
* directory.
*/
if (eod)
{
/* We signal the end of the directory by returning the
* special error -ENOENT
*/
fvdbg("End of directory\n");
error = ENOENT;
goto errout_with_semaphore;
}
error = 0;
errout_with_semaphore:
nfs_semgive(nmp);
return -error;
}
/****************************************************************************
* Name: nfs_decode_args
*
* Returned Value:
* None
*
****************************************************************************/
void nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp)
{
int adjsock = 0;
int maxio;
#ifdef CONFIG_NFS_TCPIP
/* Re-bind if rsrvd port requested and wasn't on one */
adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT)
&& (argp->flags & NFSMNT_RESVPORT);
#endif
/* Also re-bind if we're switching to/from a connected UDP socket */
adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != (argp->flags & NFSMNT_NOCONN));
/* Update flags atomically. Don't change the lock bits. */
nmp->nm_flag =
(argp->flags & ~NFSMNT_INTERNAL) | (nmp->nm_flag & NFSMNT_INTERNAL);
if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0)
{
nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
if (nmp->nm_timeo < NFS_MINTIMEO)
{
nmp->nm_timeo = NFS_MINTIMEO;
}
else if (nmp->nm_timeo > NFS_MAXTIMEO)
{
nmp->nm_timeo = NFS_MAXTIMEO;
}
}
if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1)
{
nmp->nm_retry = (argp->retrans < NFS_MAXREXMIT)? argp->retrans : NFS_MAXREXMIT;
}
if (!(nmp->nm_flag & NFSMNT_SOFT))
{
nmp->nm_retry = NFS_MAXREXMIT + 1; /* past clip limit */
}
if (argp->flags & NFSMNT_NFSV3)
{
if (argp->sotype == SOCK_DGRAM)
{
maxio = NFS_MAXDGRAMDATA;
}
else
{
maxio = NFS_MAXDATA;
}
}
else
{
maxio = NFS_V2MAXDATA;
}
if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0)
{
int osize = nmp->nm_wsize;
nmp->nm_wsize = argp->wsize;
/* Round down to multiple of blocksize */
nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
if (nmp->nm_wsize <= 0)
{
nmp->nm_wsize = NFS_FABLKSIZE;
}
adjsock |= (nmp->nm_wsize != osize);
}
if (nmp->nm_wsize > maxio)
{
nmp->nm_wsize = maxio;
}
if (nmp->nm_wsize > MAXBSIZE)
{
nmp->nm_wsize = MAXBSIZE;
}
if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0)
{
int osize = nmp->nm_rsize;
nmp->nm_rsize = argp->rsize;
/* Round down to multiple of blocksize */
nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
if (nmp->nm_rsize <= 0)
{
nmp->nm_rsize = NFS_FABLKSIZE;
}
adjsock |= (nmp->nm_rsize != osize);
}
if (nmp->nm_rsize > maxio)
{
nmp->nm_rsize = maxio;
}
if (nmp->nm_rsize > MAXBSIZE)
{
nmp->nm_rsize = MAXBSIZE;
}
if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0)
{
nmp->nm_readdirsize = argp->readdirsize;
/* Round down to multiple of blocksize */
nmp->nm_readdirsize &= ~(NFS_DIRBLKSIZ - 1);
if (nmp->nm_readdirsize < NFS_DIRBLKSIZ)
{
nmp->nm_readdirsize = NFS_DIRBLKSIZ;
}
}
else if (argp->flags & NFSMNT_RSIZE)
{
nmp->nm_readdirsize = nmp->nm_rsize;
}
if (nmp->nm_readdirsize > maxio)
{
nmp->nm_readdirsize = maxio;
}
/*
if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 &&
argp->maxgrouplist <= NFS_MAXGRPS)
{
nmp->nm_numgrps = argp->maxgrouplist;
}
if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 &&
argp->readahead <= NFS_MAXRAHEAD)
{
nmp->nm_readahead = argp->readahead;
}
*/
if (argp->flags & NFSMNT_ACREGMIN && argp->acregmin >= 0)
{
if (argp->acregmin > 0xffff)
{
nmp->nm_acregmin = 0xffff;
}
else
{
nmp->nm_acregmin = argp->acregmin;
}
}
if (argp->flags & NFSMNT_ACREGMAX && argp->acregmax >= 0)
{
if (argp->acregmax > 0xffff)
{
nmp->nm_acregmax = 0xffff;
}
else
{
nmp->nm_acregmax = argp->acregmax;
}
}
if (nmp->nm_acregmin > nmp->nm_acregmax)
{
nmp->nm_acregmin = nmp->nm_acregmax;
}
if (argp->flags & NFSMNT_ACDIRMIN && argp->acdirmin >= 0)
{
if (argp->acdirmin > 0xffff)
{
nmp->nm_acdirmin = 0xffff;
}
else
{
nmp->nm_acdirmin = argp->acdirmin;
}
}
if (argp->flags & NFSMNT_ACDIRMAX && argp->acdirmax >= 0)
{
if (argp->acdirmax > 0xffff)
{
nmp->nm_acdirmax = 0xffff;
}
else
{
nmp->nm_acdirmax = argp->acdirmax;
}
}
if (nmp->nm_acdirmin > nmp->nm_acdirmax)
{
nmp->nm_acdirmin = nmp->nm_acdirmax;
}
if (nmp->nm_so && adjsock)
{
nfs_disconnect(nmp);
if (nmp->nm_sotype == SOCK_DGRAM)
{
while (nfs_connect(nmp))
{
fvdbg("nfs_args: retrying connect\n");
}
}
}
}
/****************************************************************************
* Name: mountnfs
*
* Description:
* Common code for nfs_mount.
*
* Returned Value:
* 0 on success; a positive errno value on failure.
*
****************************************************************************/
int mountnfs(struct nfs_args *argp, void **handle)
{
FAR struct nfsmount *nmp;
struct nfsnode *np = NULL;
struct FS3args getattr;
struct rpc_reply_getattr resok;
int error = 0;
/* Create an instance of the mountpt state structure */
nmp = (FAR struct nfsmount *)kzalloc(sizeof(struct nfsmount));
if (!nmp)
{
fdbg("ERROR: Failed to allocate mountpoint structure\n");
return ENOMEM;
}
/* Initialize the allocated mountpt state structure. */
/* Initialize the semaphore that controls access. The initial count
* is zero, but nfs_semgive() is called at the completion of initialization,
* incrementing the count to one.
*/
sem_init(&nmp->nm_sem, 0, 0); /* Initialize the semaphore that controls access */
/* Initialize NFS */
nfs_init();
/* Set initial values of other fields */
nmp->nm_flag = argp->flags;
nmp->nm_timeo = NFS_TIMEO;
nmp->nm_retry = NFS_RETRANS;
nmp->nm_wsize = NFS_WSIZE;
nmp->nm_rsize = NFS_RSIZE;
nmp->nm_readdirsize = NFS_READDIRSIZE;
nmp->nm_numgrps = NFS_MAXGRPS;
nmp->nm_readahead = NFS_DEFRAHEAD;
nmp->nm_fhsize = NFSX_V3FHMAX;
nmp->nm_acregmin = NFS_MINATTRTIMO;
nmp->nm_acregmax = NFS_MAXATTRTIMO;
nmp->nm_acdirmin = NFS_MINATTRTIMO;
nmp->nm_acdirmax = NFS_MAXATTRTIMO;
strncpy(nmp->nm_path, argp->path, 90);
memcpy(&nmp->nm_nam, &argp->addr, argp->addrlen);
nfs_decode_args(nmp, argp);
/* Set up the sockets and per-host congestion */
nmp->nm_sotype = argp->sotype;
nmp->nm_soproto = argp->proto;
/* For Connection based sockets (TCP,...) defer the connect until
* the first request, in case the server is not responding.
*/
if (nmp->nm_sotype == SOCK_DGRAM)
{
/* Connection-less... connect now */
error = nfs_connect(nmp);
if (error != 0)
{
fdbg("ERROR: nfs_connect failed: %d\n", error);
goto bad;
}
}
/* Create an instance of the file private data to describe the opened
* file.
*/
np = (struct nfsnode *)kzalloc(sizeof(struct nfsnode));
if (!np)
{
fdbg("ERROR: Failed to allocate private data\n");
error = ENOMEM;
goto bad;
}
np->nfsv3_type = NFDIR;
np->n_open = true;
np->n_flag |= NMODIFIED;
nmp->nm_head = np;
nmp->nm_mounted = true;
memcpy(&nmp->nm_fh, &nmp->nm_rpcclnt->rc_fh, sizeof(nfsfh_t));
nmp->nm_fhsize = NFSX_V2FH;
memcpy(&nmp->nm_head->n_fhp, &nmp->nm_fh, sizeof(nfsfh_t));
nmp->nm_head->n_fhsize = nmp->nm_fhsize;
nmp->nm_so = nmp->nm_rpcclnt->rc_so;
/* Get the file attributes */
memset(&getattr, 0, sizeof(struct FS3args));
memset(&resok, 0, sizeof(struct rpc_reply_getattr));
getattr.fsroot.length = txdr_unsigned(nmp->nm_fhsize);
memcpy(&getattr.fsroot.handle, &nmp->nm_fh, sizeof(nfsfh_t));
error = nfs_request(nmp, NFSPROC_GETATTR,
(FAR const void *)&getattr, sizeof(struct FS3args),
(FAR void*)&resok, sizeof(struct rpc_reply_getattr));
if (error)
{
fdbg("ERROR: nfs_request failed: %d\n", error);
goto bad;
}
/* Save the file attributes */
memcpy(&np->n_fattr, &resok.attr, sizeof(struct nfs_fattr));
memcpy(&nmp->nm_fattr, &resok.attr, sizeof(struct nfs_fattr));
/* Mounted! */
*handle = (void*)nmp;
nfs_semgive(nmp);
fvdbg("Successfully mounted\n");
return 0;
bad:
/* Free all memory that was successfully allocated */
if (np)
{
kfree(np);
}
if (nmp)
{
/* Disconnect from the server */
nfs_disconnect(nmp);
/* Free connection-related resources */
sem_destroy(&nmp->nm_sem);
if (nmp->nm_so)
{
kfree(nmp->nm_so);
}
if (nmp->nm_rpcclnt)
{
kfree(nmp->nm_rpcclnt);
}
kfree(nmp);
}
return error;
}
/****************************************************************************
* Name: nfs_bind
*
* Description: This implements a portion of the mount operation. This
* function allocates and initializes the mountpoint private data and
* binds the blockdriver inode to the filesystem private data. The final
* binding of the private data (containing the blockdriver) to the
* mountpoint is performed by mount().
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
static int nfs_bind(struct inode *blkdriver, const void *data, void **handle)
{
struct nfs_args args;
int error;
memcpy(&args, data, sizeof(struct nfs_args));
if (args.version == NFS_ARGSVERSION)
{
args.flags &= ~(NFSMNT_INTERNAL | NFSMNT_NOAC);
}
else
{
return -EINVAL;
}
if ((args.flags & (NFSMNT_NFSV3 | NFSMNT_RDIRPLUS)) == NFSMNT_RDIRPLUS)
{
return -EINVAL;
}
error = mountnfs(&args, handle);
return -error;
}
/****************************************************************************
* Name: nfs_unbind
*
* Description: This implements the filesystem portion of the umount
* operation.
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
int nfs_unbind(void *handle, struct inode **blkdriver)
{
struct nfsmount *nmp = (struct nfsmount *)handle;
int error;
fvdbg("Entry\n");
if (!nmp)
{
return -EINVAL;
}
nfs_semtake(nmp);
/* Umount */
error = rpcclnt_umount(nmp->nm_rpcclnt);
if (error)
{
fdbg("ERROR: rpcclnt_umount failed: %d\n", error);
}
/* Disconnect */
nfs_disconnect(nmp);
/* And free resources */
sem_destroy(&nmp->nm_sem);
kfree(nmp->nm_head);
kfree(nmp->nm_so);
kfree(nmp->nm_rpcclnt);
kfree(nmp);
return -error;
}
/****************************************************************************
* Name: nfs_statfs
*
* Description:
* Return filesystem statistics
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
static int nfs_statfs(struct inode *mountpt, struct statfs *sbp)
{
struct rpc_reply_fsstat sfp;
struct nfsmount *nmp;
int error = 0;
uint64_t tquad;
struct FS3args fsstat;
/* Sanity checks */
DEBUGASSERT(mountpt && mountpt->i_private);
/* Get the mountpoint private data from the inode structure */
nmp = (struct nfsmount*)mountpt->i_private;
/* Check if the mount is still healthy */
nfs_semtake(nmp);
error = nfs_checkmount(nmp);
if (error < 0)
{
fdbg("nfs_checkmount failed: %d\n", error);
goto errout_with_semaphore;
}
/* Fill in the statfs info */
memset(sbp, 0, sizeof(struct statfs));
sbp->f_type = NFS_SUPER_MAGIC;
if ((nmp->nm_flag & NFSMNT_GOTFSINFO) == 0)
{
(void)nfs_fsinfo(nmp);
}
nfsstats.rpccnt[NFSPROC_FSSTAT]++;
memset(&fsstat, 0, sizeof(struct FS3args));
memset(&sfp, 0, sizeof(struct rpc_reply_fsstat));
fsstat.fsroot.length = txdr_unsigned(nmp->nm_fhsize);
fsstat.fsroot.handle = nmp->nm_fh;
error = nfs_request(nmp, NFSPROC_FSSTAT,
(FAR const void *)&fsstat, sizeof(struct FS3args),
(FAR void *) &sfp, sizeof(struct rpc_reply_fsstat));
if (error)
{
goto errout_with_semaphore;
}
nmp->nm_head->n_fattr = sfp.fsstat.obj_attributes;
sbp->f_bsize = NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp.fsstat.sf_tbytes);
sbp->f_blocks = tquad / (uint64_t) NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp.fsstat.sf_fbytes);
sbp->f_bfree = tquad / (uint64_t) NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp.fsstat.sf_abytes);
sbp->f_bavail = tquad / (uint64_t) NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp.fsstat.sf_tfiles);
sbp->f_files = tquad;
tquad = fxdr_hyper(&sfp.fsstat.sf_ffiles);
sbp->f_ffree = tquad;
sbp->f_namelen = NAME_MAX;
errout_with_semaphore:
nfs_semgive(nmp);
return -error;
}
/****************************************************************************
* Name: nfs_remove
*
* Description:
* Remove a file
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
static int nfs_remove(struct inode *mountpt, const char *relpath)
{
struct nfsmount *nmp;
struct nfsnode *np;
struct REMOVE3args remove;
struct rpc_reply_remove resok;
int error = 0;
/* Sanity checks */
DEBUGASSERT(mountpt && mountpt->i_private);
/* Get the mountpoint private data from the inode structure */
nmp = (struct nfsmount*)mountpt->i_private;
np = nmp->nm_head;
/* Check if the mount is still healthy */
nfs_semtake(nmp);
error = nfs_checkmount(nmp);
if (error == 0)
{
/* If the file is open, the correct behavior is to remove the file
* name, but to keep the file cluster chain in place until the last
* open reference to the file is closed.
*/
/* Remove the file */
if (np->nfsv3_type != NFREG)
{
error = EPERM;
goto errout_with_semaphore;
}
/* Do the rpc */
nfsstats.rpccnt[NFSPROC_REMOVE]++;
memset(&remove, 0, sizeof(struct REMOVE3args));
memset(&resok, 0, sizeof(struct rpc_reply_remove));
remove.object.dir.length = txdr_unsigned(np->n_fhsize);
memcpy(&remove.object.dir.handle, &np->n_fhp, sizeof(nfsfh_t));
remove.object.length = txdr_unsigned(64);
strncpy(remove.object.name, relpath, 64);
error = nfs_request(nmp, NFSPROC_REMOVE,
(FAR const void *)&remove, sizeof(struct REMOVE3args),
(FAR void*)&resok, sizeof(struct rpc_reply_remove));
/* Kludge City: If the first reply to the remove rpc is lost..
* the reply to the retransmitted request will be ENOENT
* since the file was in fact removed
* Therefore, we cheat and return success.
*/
if (error == ENOENT)
{
error = 0;
}
if (error)
{
goto errout_with_semaphore;
}
memcpy(&np->n_fattr, &resok.remove.dir_wcc.after, sizeof(struct nfs_fattr));
np->n_flag |= NMODIFIED;
}
NFS_INVALIDATE_ATTRCACHE(np);
errout_with_semaphore:
nfs_semgive(nmp);
return -error;
}
/****************************************************************************
* Name: nfs_mkdir
*
* Description:
* Create a directory
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
static int nfs_mkdir(struct inode *mountpt, const char *relpath, mode_t mode)
{
struct nfsv3_sattr sp;
struct nfsmount *nmp;
struct nfsnode *np;
struct MKDIR3args mkir;
struct rpc_reply_mkdir resok;
int error = 0;
/* Sanity checks */
DEBUGASSERT(mountpt && mountpt->i_private);
/* Get the mountpoint private data from the inode structure */
nmp = (struct nfsmount*) mountpt->i_private;
np = nmp->nm_head;
/* Check if the mount is still healthy */
nfs_semtake(nmp);
error = nfs_checkmount(nmp);
if (error != 0)
{
goto errout_with_semaphore;
}
nfsstats.rpccnt[NFSPROC_MKDIR]++;
memset(&mkir, 0, sizeof(struct MKDIR3args));
memset(&resok, 0, sizeof(struct rpc_reply_mkdir));
mkir.where.dir.length = txdr_unsigned(np->n_fhsize);
memcpy(&mkir.where.dir.handle, &np->n_fhp, sizeof(nfsfh_t));
mkir.where.length = txdr_unsigned(64);
strncpy(mkir.where.name, relpath, 64);
sp.sa_modetrue = nfs_true;
sp.sa_mode = txdr_unsigned(mode);
sp.sa_uidfalse = 0;
sp.sa_gidfalse = 0;
sp.sa_sizefalse = 0;
sp.sa_atimetype = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
sp.sa_mtimetype = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
//memset(&sp.sa_atime, 0, sizeof(nfstime3));
//memset(&sp.sa_mtime, 0, sizeof(nfstime3));
memcpy(&mkir.attributes, &sp, sizeof(struct nfsv3_sattr));
error = nfs_request(nmp, NFSPROC_MKDIR,
(FAR const void *)&mkir, sizeof(struct MKDIR3args),
(FAR void *)&resok, sizeof(struct rpc_reply_mkdir));
if (error)
{
goto errout_with_semaphore;
}
np->n_open = true;
np->nfsv3_type = fxdr_unsigned(uint32_t, resok.mkdir.obj_attributes.fa_type);
memcpy(&np->n_fhp, &resok.mkdir.fshandle.handle, sizeof(nfsfh_t));
np->n_size = fxdr_hyper(&resok.mkdir.obj_attributes.fa3_size);
memcpy(&np->n_fattr, &resok.mkdir.obj_attributes, sizeof(struct nfs_fattr));
fxdr_nfsv3time(&resok.mkdir.obj_attributes.fa3_mtime, &np->n_mtime)
np->n_ctime = fxdr_hyper(&resok.mkdir.obj_attributes.fa3_ctime);
np->n_flag |= NMODIFIED;
NFS_INVALIDATE_ATTRCACHE(np);
errout_with_semaphore:
nfs_semgive(nmp);
return -error;
}
/****************************************************************************
* Name: nfs_rmdir
*
* Description:
* Remove a directory
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
static int nfs_rmdir(struct inode *mountpt, const char *relpath)
{
struct nfsmount *nmp;
struct nfsnode *np;
struct RMDIR3args rmdir;
struct rpc_reply_rmdir resok;
int error = 0;
/* Sanity checks */
DEBUGASSERT(mountpt && mountpt->i_private);
/* Get the mountpoint private data from the inode structure */
nmp = (struct nfsmount *)mountpt->i_private;
np = nmp->nm_head;
/* Check if the mount is still healthy */
nfs_semtake(nmp);
error = nfs_checkmount(nmp);
if (error == 0)
{
/* Remove the directory */
if (np->nfsv3_type != NFDIR)
{
error = EPERM;
goto errout_with_semaphore;
}
/* Do the rpc */
nfsstats.rpccnt[NFSPROC_RMDIR]++;
memset(&rmdir, 0, sizeof(struct RMDIR3args));
memset(&resok, 0, sizeof(struct rpc_reply_rmdir));
rmdir.object.dir.length = txdr_unsigned(np->n_fhsize);
memcpy(&rmdir.object.dir.handle, &np->n_fhp, sizeof(nfsfh_t));
rmdir.object.length = txdr_unsigned(64);
strncpy(rmdir.object.name, relpath, 64);
error = nfs_request(nmp, NFSPROC_RMDIR,
(FAR const void *)&rmdir, sizeof(struct RMDIR3args),
(FAR void *)&resok, sizeof(struct rpc_reply_rmdir));
if (error == ENOENT)
{
error = 0;
}
if (error)
{
goto errout_with_semaphore;
}
memcpy(&np->n_fattr, &resok.rmdir.dir_wcc.after, sizeof(struct nfs_fattr));
np->n_flag |= NMODIFIED;
}
NFS_INVALIDATE_ATTRCACHE(np);
errout_with_semaphore:
nfs_semgive(nmp);
return -error;
}
/****************************************************************************
* Name: nfs_rename
*
* Description:
* Rename a file or directory
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
static int nfs_rename(struct inode *mountpt, const char *oldrelpath,
const char *newrelpath)
{
struct nfsmount *nmp;
struct nfsnode *np;
struct RENAME3args rename;
struct rpc_reply_rename resok;
int error = 0;
/* Sanity checks */
DEBUGASSERT(mountpt && mountpt->i_private);
/* Get the mountpoint private data from the inode structure */
nmp = (struct nfsmount *)mountpt->i_private;
np = nmp->nm_head;
/* Check if the mount is still healthy */
nfs_semtake(nmp);
error = nfs_checkmount(nmp);
if (error != 0)
{
goto errout_with_semaphore;
}
if (np->nfsv3_type != NFREG && np->nfsv3_type != NFDIR)
{
fdbg("open eacces typ=%d\n", np->nfsv3_type);
error = EACCES;
goto errout_with_semaphore;
}
nfsstats.rpccnt[NFSPROC_RENAME]++;
memset(&rename, 0, sizeof(struct RENAME3args));
memset(&resok, 0, sizeof(struct rpc_reply_rename));
rename.from.dir.length = txdr_unsigned(np->n_fhsize);
memcpy(&rename.from.dir.handle, &np->n_fhp, sizeof(nfsfh_t));
rename.from.length = txdr_unsigned(64);
strncpy(rename.from.name, oldrelpath, 64);
rename.to.dir.length = txdr_unsigned(np->n_fhsize);
memcpy(&rename.to.dir.handle, &np->n_fhp, sizeof(nfsfh_t));
rename.to.length = txdr_unsigned(64);
strncpy(rename.to.name, newrelpath, 64);
error = nfs_request(nmp, NFSPROC_RENAME,
(FAR const void *)&rename, sizeof(struct RENAME3args),
(FAR void *)&resok, sizeof(struct rpc_reply_rename));
/* ENOENT => 0 assuming that it is a reply to a retry. */
if (error == ENOENT)
{
error = 0;
}
if (error)
{
goto errout_with_semaphore;
}
memcpy(&np->n_fattr, &resok.rename.todir_wcc.after, sizeof(struct nfs_fattr));
np->n_flag |= NMODIFIED;
NFS_INVALIDATE_ATTRCACHE(np);
errout_with_semaphore:
nfs_semgive(nmp);
return -error;
}
/****************************************************************************
* Name: nfs_getstat
*
* Description:
* Return information about the object at the specified path. This is an
* internal version of stat() used only within this file.
*
* Returned Value:
* 0 on success; positive errno value on failure
*
* Assumptions:
* The caller has exclusive access to the NFS mount structure
*
****************************************************************************/
static int nfs_getstat(struct nfsmount *nmp, const char *relpath,
struct stat *buf)
{
struct file_handle fhandle;
struct nfs_fattr obj_attributes;
uint32_t tmp;
uint32_t mode;
int error = 0;
DEBUGASSERT(nmp && buf);
/* Get the attributes of the requested node */
error = nfs_findnode(nmp, relpath, &fhandle, &obj_attributes, NULL);
if (error != 0)
{
fdbg("ERROR: nfs_findnode failed: %d\n", error);
return error;
}
/* Construct the file mode. This is a 32-bit, encoded value containing
* both the access mode and the file type.
*/
tmp = fxdr_unsigned(uint32_t, obj_attributes.fa_mode);
/* Here we exploit the fact that most mode bits are the same in NuttX
* as in the NFSv3 spec.
*/
mode = tmp & (NFSMMODE_IXOTH|NFSMMODE_IWOTH|NFSMMODE_IROTH|
NFSMMODE_IXGRP|NFSMMODE_IWGRP|NFSMMODE_IRGRP|
NFSMMODE_IXUSR|NFSMMODE_IWUSR|NFSMMODE_IRUSR);
/* Handle the cases that are not the same */
if ((mode & NFSMMODE_ISGID) != 0)
{
mode |= S_ISGID;
}
if ((mode & NFSMMODE_ISUID) != 0)
{
mode |= S_ISUID;
}
/* Now OR in the file type */
tmp = fxdr_unsigned(uint32_t, obj_attributes.fa_type);
switch (tmp)
{
default:
case NFNON: /* Unknown type */
break;
case NFREG: /* Regular file */
mode |= S_IFREG;
break;
case NFDIR: /* Directory */
mode |= S_IFDIR;
break;
case NFBLK: /* Block special device file */
mode |= S_IFBLK;
break;
case NFCHR: /* Character special device file */
mode |= S_IFCHR;
break;
case NFLNK: /* Symbolic link */
mode |= S_IFLNK;
break;
case NFSOCK: /* Socket */
mode |= S_IFSOCK;
break;
case NFFIFO: /* Named pipe */
mode |= S_IFMT;
break;
}
buf->st_mode = mode;
buf->st_size = fxdr_hyper(&obj_attributes.fa3_size);
buf->st_blksize = 0;
buf->st_blocks = 0;
buf->st_mtime = fxdr_hyper(&obj_attributes.fa3_mtime);
buf->st_atime = fxdr_hyper(&obj_attributes.fa3_atime);
buf->st_ctime = fxdr_hyper(&obj_attributes.fa3_ctime);
return OK;
}
/****************************************************************************
* Name: nfs_stat
*
* Description:
* Return information about the file system object at 'relpath'
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
static int nfs_stat(struct inode *mountpt, const char *relpath,
struct stat *buf)
{
struct nfsmount *nmp;
int error;
/* Sanity checks */
DEBUGASSERT(mountpt && mountpt->i_private);
/* Get the mountpoint private data from the inode structure */
nmp = (struct nfsmount*)mountpt->i_private;
/* Check if the mount is still healthy */
nfs_semtake(nmp);
error = nfs_checkmount(nmp);
if (error == 0)
{
/* Get the requested FSINFO */
error = nfs_getstat(nmp, relpath, buf);
}
nfs_semgive(nmp);
return -error;
}
#ifdef COMP
/****************************************************************************
* Name: nfs_sync
*
* Description: Flush out the buffer cache
*
* Returned Value:
* 0 on success; a negated errno value on failure.
*
****************************************************************************/
int nfs_sync(struct file *filep)
{
struct inode *inode;
struct nfsmount *nmp;
struct nfsnode *np;
int error = 0;
/* Sanity checks */
DEBUGASSERT(filep->f_priv != NULL && filep->f_inode != NULL);
/* Recover our private data from the struct file instance */
np = filep->f_priv;
inode = filep->f_inode;
nmp = inode->i_private;
DEBUGASSERT(nmp != NULL);
/* Make sure that the mount is still healthy */
nfs_semtake(nmp);
error = nfs_checkmount(nmp);
if (error != 0)
{
goto errout_with_semaphore;
}
/* Force stale buffer cache information to be flushed. */
/* Check if the has been modified in any way */
if ((np->n_flag & NMODIFIED) != 0)
{
//error = VOP_FSYNC(vp, cred, waitfor, p);
}
errout_with_semaphore:
nfs_semgive(nmp);
return -error;
}
#endif
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