/**************************************************************************** * 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_v2.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_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_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 */ NULL, /* 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. ****************************************************************************/ 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 CREATE3resok *resok; void *datareply; 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 = nfs_xdrneg1; sp.sa_atimetype = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); sp.sa_mtimetype = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); sp.sa_atime = vap.fa3_atime; sp.sa_mtime = vap.fa3_mtime; memset(&create, 0, sizeof(struct CREATE3args)); create.how = sp; create.where.dir = np->n_fhp; create.where.name = relpath; error = nfs_request(nmp, NFSPROC_CREATE, &create, &datareply); 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("Failed to allocate private data\n", error); error = -ENOMEM; goto errout_with_semaphore; } /* Initialize the file private data (only need to initialize * non-zero elements) */ resok = (struct CREATE3resok *) datareply; np->n_open = true; np->nfsv3_type = NFREG; np->n_fhp = resok->handle; np->n_size = fxdr_hyper(&resok->attributes.fa3_size); np->n_fattr = resok->attributes; fxdr_nfsv3time(&resok->attributes.fa3_mtime, &np->n_mtime) np->n_ctime = fxdr_hyper(&resok->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 && np->nfsv3_type != NFDIR) { fdbg("open eacces typ=%d\n", np->nfsv3_type); return EACCES; } 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 ****************************************************************************/ 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 ****************************************************************************/ static ssize_t nfs_read(FAR struct file *filep, char *buffer, size_t buflen) { struct nfsmount *nmp; struct nfsnode *np; unsigned int readsize; int bytesleft; uint64_t offset; void *datareply; struct READ3args read; struct READ3resok *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); return EACCES; } if ((nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_GOTFSINFO)) == NFSMNT_NFSV3) { (void)nfs_fsinfo(filep->f_inode, 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 = np->nfsv3_type; read.count = buflen; read.offset = offset; error = nfs_request(nmp, NFSPROC_READ, &read, &datareply); if (error) { goto errout_with_semaphore; } //bcopy (datareply, &resok, sizeof(struct READ3resok)); resok = (struct READ3resok *) datareply; eof = resok->eof; if (eof == true) { readsize = resok->count; np->n_fattr = resok->file_attributes; memcpy(userbuffer, resok->data, readsize); } else { goto again; } nfs_semgive(nmp); return readsize; errout_with_semaphore: nfs_semgive(nmp); return error; } /**************************************************************************** * Name: nfs_write ****************************************************************************/ 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; void *datareply; struct WRITE3args write; struct WRITE3resok *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 = np->nfsv3_type; write.offset = offset; write.count = buflen; write.stable = committed; memcpy((void *)write.data, userbuffer, buflen); error = nfs_request(nmp, NFSPROC_WRITE, &write, &datareply); if (error) { goto errout_with_semaphore; } //bcopy (datareply, &resok, sizeof(struct WRITE3resok)); resok = (struct WRITE3resok *) datareply; writesize = resok->count; if (writesize == 0) { error = NFSERR_IO; goto errout_with_semaphore; } commit = resok->committed; np->n_fattr = resok->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->verf, (void*) nmp->nm_verf, NFSX_V3WRITEVERF); nmp->nm_flag |= NFSMNT_HASWRITEVERF; } else if (strncmp((char*) resok->verf, (char*) nmp->nm_verf, NFSX_V3WRITEVERF)) { bcopy((void*) resok->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_readdirrpc * * Description: The function below stuff the cookies in after the name. ****************************************************************************/ int nfs_readdirrpc(struct nfsmount *nmp, struct nfsnode *np, bool end_of_directory, struct fs_dirent_s *dir) { int error = 0; void *datareply; struct READDIR3args readir; struct READDIR3resok *resok = NULL; /* Loop around doing readdir rpc's of size nm_readdirsize * truncated to a multiple of NFS_READDIRBLKSIZ. * The stopping criteria is EOF. */ while (end_of_directory == false) { nfsstats.rpccnt[NFSPROC_READDIR]++; memset(&readir, 0, sizeof(struct READDIR3args)); readir.dir = np->n_fhp; readir.count = nmp->nm_readdirsize; if (nfsstats.rpccnt[NFSPROC_READDIR] == 1) { readir.cookie.nfsuquad[0] = 0; readir.cookie.nfsuquad[1] = 0; readir.cookieverf.nfsuquad[0] = 0; readir.cookieverf.nfsuquad[1] = 0; } else { readir.cookie.nfsuquad[0] = dir->u.nfs.cookie[0]; readir.cookie.nfsuquad[1] = dir->u.nfs.cookie[1]; readir.cookieverf.nfsuquad[0] = np->n_cookieverf.nfsuquad[0]; readir.cookieverf.nfsuquad[1] = np->n_cookieverf.nfsuquad[1]; } error = nfs_request(nmp, NFSPROC_READDIR, &readir, &datareply); if (error) { goto nfsmout; } //bcopy (datareply, &resok, sizeof(struct READDIR3resok)); resok = (struct READDIR3resok *) datareply; np->n_fattr = resok->dir_attributes; np->n_cookieverf.nfsuquad[0] = resok->cookieverf.nfsuquad[0]; np->n_cookieverf.nfsuquad[1] = resok->cookieverf.nfsuquad[1]; dir->fd_dir.d_type = resok->reply.entries->fileid; memcpy(&dir->fd_dir.d_name[NAME_MAX], &resok->reply.entries->name, NAME_MAX); //dir->fd_dir.d_name = resok->reply.entries->name;// dir->u.nfs.cookie[0] = resok->reply.entries->cookie.nfsuquad[0]; dir->u.nfs.cookie[1] = resok->reply.entries->cookie.nfsuquad[1]; if (resok->reply.eof == true) { end_of_directory = true; } //more_dirs = fxdr_unsigned(int, *dp); /* loop thru the dir entries*/ /* while (more_dirs && 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_dirs = fxdr_unsigned(int, *ndp); } */ } /* We are now either at the end of the directory */ if (resok->reply.entries == NULL) { np->n_direofoffset = fxdr_hyper(&dir->u.nfs.cookie[0]); /* 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 * ****************************************************************************/ 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("romfs_checkmount failed: %d\n", error); goto errout_with_semaphore; } if (np->nfsv3_type != NFDIR) { error = EPERM; goto errout_with_semaphore; } dir->u.nfs.nd_direoffset = np->n_direofoffset; /* First, check for hit on the EOF offset */ if (dir->u.nfs.nd_direoffset != 0) { nfsstats.direofcache_hits++; //np->n_open = true; return 0; } if ((nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_GOTFSINFO)) == NFSMNT_NFSV3) { (void)nfs_fsinfo(mountpt, NULL, NULL); } error = nfs_readdirrpc(nmp, np, eof, dir); if (error == NFSERR_BAD_COOKIE) { error = EINVAL; } if (!error && eof) { nfsstats.direofcache_misses++; nfs_semgive(nmp); return 0; } errout_with_semaphore: nfs_semgive(nmp); return error; } /**************************************************************************** * Name: nfs_decode_args ****************************************************************************/ 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)) { nvdbg("nfs_args: retrying connect\n"); } } } /**************************************************************************** * Name: mountnfs * * Description: Common code for nfs_mount. * ****************************************************************************/ int mountnfs(struct nfs_args *argp, void **handle) { struct nfsmount *nmp; struct nfsnode *np; int error = 0; /* Create an instance of the mountpt state structure */ nmp = (struct nfsmount *)kzalloc(sizeof(struct nfsmount)); if (!nmp) { fdbg("Failed to allocate mountpoint structure\n"); return -ENOMEM; } /* Initialize the allocated mountpt state structure. The filesystem is * responsible for one reference ont the blkdriver inode and does not * have to addref() here (but does have to release in ubind(). */ sem_init(&nmp->nm_sem, 0, 0); /* Initialize the semaphore that controls access */ nfs_init(); 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; nmp->nm_fh = argp->fh; strncpy(nmp->nm_path, argp->path,90); nmp->nm_nam = argp->addr; nfs_decode_args(nmp, argp); /* Create an instance of the file private data to describe the opened * file. */ np = (struct nfsnode *)kzalloc(sizeof(struct nfsnode)); if (!np) { fdbg("Failed to allocate private data\n", error); return -ENOMEM; } nmp->nm_head = np; /* 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 && (error = nfs_connect(nmp))) { goto bad; } /* Mounted! */ nmp->nm_mounted = true; nmp->nm_fh = nmp->nm_rpcclnt->rc_fh; nmp->nm_so = nmp->nm_rpcclnt->rc_so; *handle = (void*)nmp; nfs_semgive(nmp); return 0; bad: nfs_disconnect(nmp); sem_destroy(&nmp->nm_sem); kfree(nmp->nm_head); kfree(nmp->nm_so); 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(). * ****************************************************************************/ static int nfs_bind(struct inode *blkdriver, const void *data, void **handle) { int error; struct nfs_args args; 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; } if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) { return -EINVAL; } error = mountnfs(&args, handle); return error; } /**************************************************************************** * Name: nfs_unbind * * Description: This implements the filesystem portion of the umount * operation. * ****************************************************************************/ 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); error = rpcclnt_umount(nmp->nm_rpcclnt); if (error) { dbg("Umounting fails %d\n", error); goto bad; } nfs_disconnect(nmp); sem_destroy(&nmp->nm_sem); kfree(nmp->nm_head); kfree(nmp->nm_so); kfree(nmp->nm_rpcclnt); kfree(nmp); return 0; bad: nfs_disconnect(nmp); return(error); } /**************************************************************************** * Name: nfs_statfs * * Description: Return filesystem statistics * ****************************************************************************/ static int nfs_statfs(struct inode *mountpt, struct statfs *sbp) { struct nfs_statfs *sfp; struct nfsmount *nmp; int error = 0; uint64_t tquad; void *datareply; 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("romfs_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(mountpt, NULL, NULL); } nfsstats.rpccnt[NFSPROC_FSSTAT]++; memset(&fsstat, 0, sizeof(struct FS3args)); fsstat.fsroot = nmp->nm_fh; error = nfs_request(nmp, NFSPROC_FSSTAT, &fsstat, &datareply); if (error) { goto errout_with_semaphore; } sfp = (struct nfs_statfs *) datareply; nmp->nm_head->n_fattr = sfp->obj_attributes; sbp->f_bsize = NFS_FABLKSIZE; tquad = fxdr_hyper(&sfp->sf_tbytes); sbp->f_blocks = tquad / (uint64_t) NFS_FABLKSIZE; tquad = fxdr_hyper(&sfp->sf_fbytes); sbp->f_bfree = tquad / (uint64_t) NFS_FABLKSIZE; tquad = fxdr_hyper(&sfp->sf_abytes); sbp->f_bavail = tquad / (uint64_t) NFS_FABLKSIZE; tquad = fxdr_hyper(&sfp->sf_tfiles); sbp->f_files = tquad; tquad = fxdr_hyper(&sfp->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 * ****************************************************************************/ static int nfs_remove(struct inode *mountpt, const char *relpath) { struct nfsmount *nmp; struct nfsnode *np; void *datareply; struct REMOVE3args remove; struct REMOVE3resok *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)); remove.object.dir = np->n_fhp; remove.object.name = relpath; error = nfs_request(nmp, NFSPROC_REMOVE, &remove, &datareply); /* 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; } resok = (struct REMOVE3resok *) datareply; 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 * ****************************************************************************/ 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 MKDIR3resok *resok; void *datareply; 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)); mkir.where.dir = np->n_fhp; mkir.where.name = relpath; sp.sa_modetrue = nfs_true; sp.sa_mode = txdr_unsigned(mode); sp.sa_uidfalse = nfs_xdrneg1; sp.sa_gidfalse = nfs_xdrneg1; sp.sa_sizefalse = nfs_xdrneg1; sp.sa_atimetype = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); sp.sa_mtimetype = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); memset(&sp.sa_atime, 0, sizeof(nfstime3)); memset(&sp.sa_mtime, 0, sizeof(nfstime3)); mkir.attributes = sp; error = nfs_request(nmp, NFSPROC_MKDIR, &mkir, &datareply); if (error) { goto errout_with_semaphore; } resok = (struct MKDIR3resok *) datareply; np->nfsv3_type = NFDIR; np->n_fhp = resok->handle; np->n_fattr = resok->obj_attributes; np->n_flag |= NMODIFIED; NFS_INVALIDATE_ATTRCACHE(np); errout_with_semaphore: nfs_semgive(nmp); return error; } /**************************************************************************** * Name: nfs_rmdir * * Description: Remove a directory * ****************************************************************************/ static int nfs_rmdir(struct inode *mountpt, const char *relpath) { struct nfsmount *nmp; struct nfsnode *np; struct RMDIR3args rmdir; struct RMDIR3resok *resok; void *datareply; 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)); rmdir.object.dir = np->n_fhp; rmdir.object.name = relpath; error = nfs_request(nmp, NFSPROC_RMDIR, &rmdir, &datareply); if (error == ENOENT) { error = 0; } if (error) { goto errout_with_semaphore; } resok = (struct RMDIR3resok *) datareply; 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 * ****************************************************************************/ static int nfs_rename(struct inode *mountpt, const char *oldrelpath, const char *newrelpath) { struct nfsmount *nmp; struct nfsnode *np; void *datareply; struct RENAME3args rename; struct RENAME3resok *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)); rename.from.dir = np->n_fhp; rename.from.name = oldrelpath; rename.to.dir = np->n_fhp; rename.to.name = newrelpath; error = nfs_request(nmp, NFSPROC_RENAME, &rename, &datareply); /* ENOENT => 0 assuming that it is a reply to a retry. */ if (error == ENOENT) { error = 0; } if (error) { goto errout_with_semaphore; } resok = (struct RENAME3resok *) datareply; 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_fsinfo * * Description: Return information about a file or directory * ****************************************************************************/ static int nfs_fsinfo(struct inode *mountpt, const char *relpath, struct stat *buf) { struct nfsv3_fsinfo *fsp; struct FS3args fsinfo; struct nfsmount *nmp; uint32_t pref, max; int error = 0; void *datareply; /* 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) { goto errout_with_semaphore; } memset(buf, 0, sizeof(struct stat)); nfsstats.rpccnt[NFSPROC_FSINFO]++; fsinfo.fsroot = nmp->nm_fh; error = nfs_request(nmp, NFSPROC_FSINFO, &fsinfo, &datareply); if (error) { goto errout_with_semaphore; } fsp = (struct nfsv3_fsinfo *) datareply; nmp->nm_head->n_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; } } buf->st_mode = fxdr_hyper(&fsp->obj_attributes.fa_mode); buf->st_size = fxdr_hyper(&fsp->obj_attributes.fa3_size); buf->st_blksize = 0; buf->st_blocks = 0; buf->st_mtime = fxdr_hyper(&fsp->obj_attributes.fa3_mtime); buf->st_atime = fxdr_hyper(&fsp->obj_attributes.fa3_atime); buf->st_ctime = fxdr_hyper(&fsp->obj_attributes.fa3_ctime); nmp->nm_flag |= NFSMNT_GOTFSINFO; errout_with_semaphore: nfs_semgive(nmp); return error; } #ifdef COMP /**************************************************************************** * Name: nfs_sync * * Description: Flush out the buffer cache * ****************************************************************************/ 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); } return error; errout_with_semaphore: nfs_semgive(nmp); return error; } #endif