/**************************************************************************** * 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 * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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) /**************************************************************************** * Private Type Definitions ****************************************************************************/ struct nfs_dirent { uint32_t cookie[2]; struct dirent dirent; }; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ 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_getfsinfo(struct nfsmount *nmp, const char *relpath, struct stat *buf); static int nfs_fsinfo(struct inode *mountpt, const char *relpath, struct stat *buf); /**************************************************************************** * External Public Data (this belong in a header file) ****************************************************************************/ extern uint32_t nfs_true; extern uint32_t nfs_false; extern uint32_t nfs_xdrneg1; extern struct nfsstats nfsstats; extern int nfs_ticks; /**************************************************************************** * 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_fsinfo /* stat */ }; /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * 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 inode *in; //struct nfs_fattr vap; struct nfsv3_sattr sp; struct nfsmount *nmp; struct nfsnode *np; struct CREATE3args create; struct rpc_reply_create resok; 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; np = (struct nfsnode*)filep->f_priv; DEBUGASSERT(nmp != NULL); /* Check if the mount is still healthy */ nfs_semtake(nmp); error = nfs_checkmount(nmp); if (error != 0) { goto errout_with_semaphore; } if (oflags == O_CREAT) { /* Sanity checks */ DEBUGASSERT(filep->f_priv == NULL); again: 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)); create.how = sp; create.where.dir.length = txdr_unsigned(np->n_fhsize); create.where.dir.handle = np->n_fhp; create.where.length = txdr_unsigned(64); strncpy(create.where.name, relpath, 64); error = nfs_request(nmp, NFSPROC_CREATE, (FAR const void *)&create, (void *)&resok, sizeof(struct rpc_reply_create)); if (!error) { /* 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 errout_with_semaphore; } /* Initialize the file private data (only need to initialize * non-zero elements) */ // np->nfsv3_type = fxdr_unsigned(uint32_t, resok.attributes.fa_type); /* The full path exists -- but is the final component a file * or a directory? */ if (np->nfsv3_type == NFDIR) { /* It is a directory */ error = EISDIR; fdbg("ERROR: '%s' is a directory\n", relpath); goto errout_with_semaphore; } np->n_open = true; bcopy(&resok.create.fshandle.handle, &np->n_fhp, sizeof(nfsfh_t)); np->n_size = fxdr_hyper(&resok.create.attributes.fa3_size); bcopy(&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); /* Attach the private date 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; nmp->nm_head = np->n_next; error = 0; } else { if (error == NFSERR_NOTSUPP) { goto again; } } np->n_flag |= NMODIFIED; } else { if (np->nfsv3_type != NFREG) { fdbg("ERROR: open eacces typ=%d\n", np->nfsv3_type); error = EACCES; goto errout_with_semaphore; } if (np->n_flag & NMODIFIED) { if (np->nfsv3_type == NFDIR) { np->n_direofoffset = 0; } } } /* For open/close consistency. */ NFS_INVALIDATE_ATTRCACHE(np); 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; bool eof; 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; eof = false; 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_getfsinfo(nmp, NULL, NULL); } /* 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)); 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, (void *)&resok, sizeof(struct rpc_reply_read)); if (error) { goto errout_with_semaphore; } //eof = resok.eof; if (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; enum stable_how commit; 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)); 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, (FAR void *)&resok, sizeof(struct rpc_reply_write)); if (error) { goto errout_with_semaphore; } //writesize = resok.count; if (writesize == 0) { error = NFSERR_IO; goto errout_with_semaphore; } //commit = resok.committed; np->n_fattr = resok.write.file_wcc.after; /* 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) { bcopy((void*) resok.write.verf, (void*) nmp->nm_verf, NFSX_V3WRITEVERF); nmp->nm_flag |= NFSMNT_HASWRITEVERF; } else if (strncmp((char*) resok.write.verf, (char*) nmp->nm_verf, NFSX_V3WRITEVERF)) { bcopy((void*) resok.write.verf, (void*) nmp->nm_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 nfsnode *np; //struct nfs_dirinfo_s dirinfo; int ret; fvdbg("relpath: \"%s\"\n", relpath ? relpath : "NULL"); /* Sanity checks */ DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL); /* Recover our private data from the inode instance */ nmp = mountpt->i_private; np = nmp->nm_head; /* Make sure that the mount is still healthy */ nfs_semtake(nmp); ret = nfs_checkmount(nmp); if (ret != OK) { fdbg("nfs_checkmount failed: %d\n", ret); goto errout_with_semaphore; } /* The entry is a directory */ if (np->nfsv3_type != NFDIR) { fdbg("open eacces type=%d\n", np->nfsv3_type); ret = EACCES; goto errout_with_semaphore; } /* The requested directory must be the volume-relative "root" directory */ if (relpath && relpath[0] != '\0') { ret = ENOENT; goto errout_with_semaphore; } if (np->n_flag & NMODIFIED) { if (np->nfsv3_type == NFDIR) { np->n_direofoffset = 0; dir->u.nfs.nd_direoffset = 0; dir->u.nfs.cookie[0] = 0; dir->u.nfs.cookie[1] = 0; } } ret = OK; errout_with_semaphore: nfs_semgive(nmp); return -ret; } /**************************************************************************** * Name: nfs_readdirrpc * * Description: * The function below stuff the cookies in after the name. * * Returned Value: * 0 on success; a positive errno value on failure. * ****************************************************************************/ int nfs_readdirrpc(struct nfsmount *nmp, struct nfsnode *np, bool eod, struct fs_dirent_s *dir) { struct READDIR3args readdir; struct rpc_reply_readdir resok; int error = 0; /* Loop around doing readdir rpc's of size nm_readdirsize * truncated to a multiple of NFS_READDIRBLKSIZ. * The stopping criteria is EOF. */ while (eod == false) { nfsstats.rpccnt[NFSPROC_READDIR]++; memset(&readdir, 0, sizeof(struct READDIR3args)); readdir.dir.length = txdr_unsigned(np->n_fhsize); readdir.dir.handle = np->n_fhp; readdir.count = nmp->nm_readdirsize; if (nfsstats.rpccnt[NFSPROC_READDIR] == 1) { readdir.cookie.nfsuquad[0] = 0; readdir.cookie.nfsuquad[1] = 0; readdir.cookieverf.nfsuquad[0] = 0; readdir.cookieverf.nfsuquad[1] = 0; } else { readdir.cookie.nfsuquad[0] = dir->u.nfs.cookie[0]; readdir.cookie.nfsuquad[1] = dir->u.nfs.cookie[1]; readdir.cookieverf.nfsuquad[0] = np->n_cookieverf.nfsuquad[0]; readdir.cookieverf.nfsuquad[1] = np->n_cookieverf.nfsuquad[1]; } error = nfs_request(nmp, NFSPROC_READDIR, (FAR const void *)&readdir, (FAR void *)&resok, sizeof(struct rpc_reply_readdir)); if (error) { goto nfsmout; } #if 0 /* Save the node attributes and cooking information */ np->n_fattr = resok.readdir.dir_attributes; np->n_cookieverf.nfsuquad[0] = resok.readdir.cookieverf.nfsuquad[0]; np->n_cookieverf.nfsuquad[1] = resok.readdir.cookieverf.nfsuquad[1]; dir->u.nfs.cookie[0] = resok.readdir.reply.entries->cookie.nfsuquad[0]; dir->u.nfs.cookie[1] = resok.readdir.reply.entries->cookie.nfsuquad[1]; /* Return the Type of the node to the caller */ dir->fd_dir.d_type = resok.readdir.reply.entries->fileid; #warning "This must match the type values in dirent.h" /* Return the name of the node to the caller */ #warning "The name in the structure is only a char -- that won't work!" strncpy(dir->fd_dir.d_name, resok.readdir.reply.entries->name, NAME_MAX); dir->fd_dir.d_name[NAME_MAX] = '\0'; /* Check for the end of the directory listing */ eof = resok.readdir.reply.eof; /* loop thru the dir entries */ #warning "The result structure contains a pointer to the next entry -- that won't work!" more = fxdr_unsigned(int, *dp); while (more && bigenough) { if (bigenough) { if (info_v3) { dir->u.nfs.cookie[0] = cookie.nfsuquad[0]; } else { dir->u.nfs.cookie[0] = ndp->cookie[0] = 0; } dir->u.nfs.cookie[1] = ndp->cookie[1] = cookie.nfsuquad[1]; } more = fxdr_unsigned(int, *ndp); } } /* We are now either at the end of the directory */ if (resok.readdir.reply.entries == NULL) { np->n_direofoffset = fxdr_hyper(&dir->u.nfs.cookie[0]); #endif /* We signal the end of the directory by returning the * special error -ENOENT */ fdbg("End of directory\n"); error = ENOENT; } nfsmout: 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) { int error = 0; struct nfsmount *nmp; struct nfsnode *np; bool eof = false; //struct nfs_dirent *ndp; fvdbg("Entry\n"); /* Sanity checks */ DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL); /* Recover our private data from the inode instance */ nmp = mountpt->i_private; np = nmp->nm_head; dir->fd_root = mountpt; /* 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; } dir->fd_dir.d_name[0] = '\0'; if (np->nfsv3_type != NFDIR) { error = EPERM; goto errout_with_semaphore; } dir->u.nfs.nd_direoffset = np->n_direofoffset; dir->fd_dir.d_type = np->nfsv3_type; /* First, check for hit on the EOF offset */ if (dir->u.nfs.nd_direoffset != 0) { nfsstats.direofcache_hits++; //np->n_open = true; goto success_with_semaphore; } if ((nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_GOTFSINFO)) == NFSMNT_NFSV3) { (void)nfs_getfsinfo(nmp, NULL, NULL); } error = nfs_readdirrpc(nmp, np, eof, dir); if (error == NFSERR_BAD_COOKIE) { error = EINVAL; goto errout_with_semaphore; } if (!error && eof) { nfsstats.direofcache_misses++; } success_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; nmp->nm_fh = nmp->nm_rpcclnt->rc_fh; nmp->nm_fhsize = NFSX_V2FH; nmp->nm_head->n_fhp = nmp->nm_fh; 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); getattr.fsroot.handle = nmp->nm_fh; error = nfs_request(nmp, NFSPROC_GETATTR, (FAR const void *)&getattr, (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; bcopy(data, &args, 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_getfsinfo(nmp, NULL, NULL); } 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, (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); remove.object.dir.handle = np->n_fhp; remove.object.length = txdr_unsigned(64); strncpy(remove.object.name, relpath, 64); error = nfs_request(nmp, NFSPROC_REMOVE, (FAR const void *)&remove, (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; } //np->n_fattr = resok.dir_wcc.after; 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); mkir.where.dir.handle = np->n_fhp; 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)); mkir.attributes = sp; error = nfs_request(nmp, NFSPROC_MKDIR, (FAR const void *)&mkir, (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.obj_attributes.fa_type); np->n_fhp = resok.fshandle.handle; np->n_size = fxdr_hyper(&resok.obj_attributes.fa3_size); np->n_fattr = resok.obj_attributes; fxdr_nfsv3time(&resok.obj_attributes.fa3_mtime, &np->n_mtime) np->n_ctime = fxdr_hyper(&resok.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); rmdir.object.dir.handle = np->n_fhp; rmdir.object.length = txdr_unsigned(64); strncpy(rmdir.object.name, relpath, 64); error = nfs_request(nmp, NFSPROC_RMDIR, (FAR const void *)&rmdir, (FAR void *)&resok, sizeof(struct rpc_reply_rmdir)); if (error == ENOENT) { error = 0; } if (error) { goto errout_with_semaphore; } //np->n_fattr = resok.dir_wcc.after; 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); rename.from.dir.handle = np->n_fhp; rename.from.length = txdr_unsigned(64); strncpy(rename.from.name, oldrelpath, 64); rename.to.dir.length = txdr_unsigned(np->n_fhsize); rename.to.dir.handle = np->n_fhp; rename.to.length = txdr_unsigned(64); strncpy(rename.to.name, newrelpath, 64); error = nfs_request(nmp, NFSPROC_RENAME, (FAR const void *)&rename, (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; } //np->n_fattr = resok.todir_wcc.after; np->n_flag |= NMODIFIED; NFS_INVALIDATE_ATTRCACHE(np); errout_with_semaphore: nfs_semgive(nmp); return -error; } /**************************************************************************** * Name: nfs_getfsinfo * * Description: * Return information about root directory. This is an internal version * 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_getfsinfo(struct nfsmount *nmp, const char *relpath, struct stat *buf) { struct rpc_reply_fsinfo fsp; struct FS3args fsinfo; //uint32_t pref, max; int error = 0; #warning "relpath is not used! Additional logic will be required!" memset(&fsinfo, 0, sizeof(struct FS3args)); memset(&fsp, 0, sizeof(struct rpc_reply_fsinfo)); nfsstats.rpccnt[NFSPROC_FSINFO]++; fsinfo.fsroot.length = txdr_unsigned(nmp->nm_fhsize); fsinfo.fsroot.handle = nmp->nm_fh; /* Request FSINFO from the server */ error = nfs_request(nmp, NFSPROC_FSINFO, (FAR const void *)&fsinfo, (FAR void *)&fsp, sizeof(struct rpc_reply_fsinfo)); if (error) { return error; } //nmp->nm_fattr = fsp.obj_attributes; /* pref = fxdr_unsigned(uint32_t, fsp.fs_wtpref); if (pref < nmp->nm_wsize) { nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & ~(NFS_FABLKSIZE - 1); } max = fxdr_unsigned(uint32_t, fsp.fs_wtmax); if (max < nmp->nm_wsize) { nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); if (nmp->nm_wsize == 0) nmp->nm_wsize = max; } pref = fxdr_unsigned(uint32_t, fsp.fs_rtpref); if (pref < nmp->nm_rsize) { nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & ~(NFS_FABLKSIZE - 1); } max = fxdr_unsigned(uint32_t, fsp.fs_rtmax); if (max < nmp->nm_rsize) { nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); if (nmp->nm_rsize == 0) { nmp->nm_rsize = max; } } pref = fxdr_unsigned(uint32_t, fsp.fs_dtpref); if (pref < nmp->nm_readdirsize) { nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) & ~(NFS_DIRBLKSIZ - 1); } if (max < nmp->nm_readdirsize) { nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1); if (nmp->nm_readdirsize == 0) { nmp->nm_readdirsize = max; } } */ /* Verify that the caller has provided a non-NULL location to return the * FSINFO data. */ if (buf) { buf->st_mode = fxdr_unsigned(uint32_t, nmp->nm_fattr.fa_mode); buf->st_size = fxdr_hyper(&nmp->nm_fattr.fa3_size); buf->st_blksize = 0; buf->st_blocks = 0; buf->st_mtime = fxdr_hyper(&nmp->nm_fattr.fa3_mtime); buf->st_atime = fxdr_hyper(&nmp->nm_fattr.fa3_atime); buf->st_ctime = fxdr_hyper(&nmp->nm_fattr.fa3_ctime); } nmp->nm_flag |= NFSMNT_GOTFSINFO; return 0; } /**************************************************************************** * Name: nfs_fsinfo * * Description: * Return information about root directory * * Returned Value: * 0 on success; a negated errno value on failure. * ****************************************************************************/ static int nfs_fsinfo(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_getfsinfo(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