diff options
Diffstat (limited to 'sys/fs/nfsclient/nfs_clvnops.c')
| -rw-r--r-- | sys/fs/nfsclient/nfs_clvnops.c | 3131 |
1 files changed, 3131 insertions, 0 deletions
diff --git a/sys/fs/nfsclient/nfs_clvnops.c b/sys/fs/nfsclient/nfs_clvnops.c new file mode 100644 index 0000000..62808a4 --- /dev/null +++ b/sys/fs/nfsclient/nfs_clvnops.c @@ -0,0 +1,3131 @@ +/*- + * Copyright (c) 1989, 1993 + * 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. + * 4. 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. + * + * from nfs_vnops.c 8.16 (Berkeley) 5/27/95 + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * vnode op calls for Sun NFS version 2, 3 and 4 + */ + +#include "opt_inet.h" + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/systm.h> +#include <sys/resourcevar.h> +#include <sys/proc.h> +#include <sys/mount.h> +#include <sys/bio.h> +#include <sys/buf.h> +#include <sys/malloc.h> +#include <sys/mbuf.h> +#include <sys/namei.h> +#include <sys/socket.h> +#include <sys/vnode.h> +#include <sys/dirent.h> +#include <sys/fcntl.h> +#include <sys/lockf.h> +#include <sys/stat.h> +#include <sys/sysctl.h> +#include <sys/signalvar.h> + +#include <vm/vm.h> +#include <vm/vm_object.h> +#include <vm/vm_extern.h> +#include <vm/vm_object.h> + + +#include <fs/nfs/nfsport.h> +#include <fs/nfsclient/nfsnode.h> +#include <fs/nfsclient/nfsmount.h> +#include <fs/nfsclient/nfs.h> +#include <fs/nfsclient/nfs_lock.h> + +#include <net/if.h> +#include <netinet/vinet.h> +#include <netinet/in.h> +#include <netinet/in_var.h> + +/* Defs */ +#define TRUE 1 +#define FALSE 0 + +extern struct nfsstats newnfsstats; +MALLOC_DECLARE(M_NEWNFSREQ); +vop_advlock_t *ncl_advlock_p = ncl_dolock; + +/* + * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these + * calls are not in getblk() and brelse() so that they would not be necessary + * here. + */ +#ifndef B_VMIO +#define vfs_busy_pages(bp, f) +#endif + +static vop_read_t nfsfifo_read; +static vop_write_t nfsfifo_write; +static vop_close_t nfsfifo_close; +static int nfs_setattrrpc(struct vnode *, struct vattr *, struct ucred *, + struct thread *); +static vop_lookup_t nfs_lookup; +static vop_create_t nfs_create; +static vop_mknod_t nfs_mknod; +static vop_open_t nfs_open; +static vop_close_t nfs_close; +static vop_access_t nfs_access; +static vop_getattr_t nfs_getattr; +static vop_setattr_t nfs_setattr; +static vop_read_t nfs_read; +static vop_fsync_t nfs_fsync; +static vop_remove_t nfs_remove; +static vop_link_t nfs_link; +static vop_rename_t nfs_rename; +static vop_mkdir_t nfs_mkdir; +static vop_rmdir_t nfs_rmdir; +static vop_symlink_t nfs_symlink; +static vop_readdir_t nfs_readdir; +static vop_strategy_t nfs_strategy; +static vop_lock1_t nfs_lock1; +static int nfs_lookitup(struct vnode *, char *, int, + struct ucred *, struct thread *, struct nfsnode **); +static int nfs_sillyrename(struct vnode *, struct vnode *, + struct componentname *); +static vop_access_t nfsspec_access; +static vop_readlink_t nfs_readlink; +static vop_print_t nfs_print; +static vop_advlock_t nfs_advlock; +static vop_advlockasync_t nfs_advlockasync; +#ifdef NFS4_ACL_EXTATTR_NAME +static vop_getacl_t nfs_getacl; +static vop_setacl_t nfs_setacl; +#endif + +/* + * Global vfs data structures for nfs + */ +struct vop_vector newnfs_vnodeops = { + .vop_default = &default_vnodeops, + .vop_access = nfs_access, + .vop_advlock = nfs_advlock, + .vop_advlockasync = nfs_advlockasync, + .vop_close = nfs_close, + .vop_create = nfs_create, + .vop_fsync = nfs_fsync, + .vop_getattr = nfs_getattr, + .vop_getpages = ncl_getpages, + .vop_putpages = ncl_putpages, + .vop_inactive = ncl_inactive, + .vop_link = nfs_link, + .vop_lock1 = nfs_lock1, + .vop_lookup = nfs_lookup, + .vop_mkdir = nfs_mkdir, + .vop_mknod = nfs_mknod, + .vop_open = nfs_open, + .vop_print = nfs_print, + .vop_read = nfs_read, + .vop_readdir = nfs_readdir, + .vop_readlink = nfs_readlink, + .vop_reclaim = ncl_reclaim, + .vop_remove = nfs_remove, + .vop_rename = nfs_rename, + .vop_rmdir = nfs_rmdir, + .vop_setattr = nfs_setattr, + .vop_strategy = nfs_strategy, + .vop_symlink = nfs_symlink, + .vop_write = ncl_write, +#ifdef NFS4_ACL_EXTATTR_NAME + .vop_getacl = nfs_getacl, + .vop_setacl = nfs_setacl, +#endif +}; + +struct vop_vector newnfs_fifoops = { + .vop_default = &fifo_specops, + .vop_access = nfsspec_access, + .vop_close = nfsfifo_close, + .vop_fsync = nfs_fsync, + .vop_getattr = nfs_getattr, + .vop_inactive = ncl_inactive, + .vop_print = nfs_print, + .vop_read = nfsfifo_read, + .vop_reclaim = ncl_reclaim, + .vop_setattr = nfs_setattr, + .vop_write = nfsfifo_write, +}; + +static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, + struct componentname *cnp, struct vattr *vap); +static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name, + int namelen, struct ucred *cred, struct thread *td); +static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, + char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp, + char *tnameptr, int tnamelen, struct ucred *cred, struct thread *td); +static int nfs_renameit(struct vnode *sdvp, struct vnode *svp, + struct componentname *scnp, struct sillyrename *sp); + +/* + * Global variables + */ +#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) + +SYSCTL_DECL(_vfs_newnfs); + +static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO; +SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW, + &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout"); + +static int nfs_prime_access_cache = 0; +SYSCTL_INT(_vfs_newnfs, OID_AUTO, prime_access_cache, CTLFLAG_RW, + &nfs_prime_access_cache, 0, + "Prime NFS ACCESS cache when fetching attributes"); + +static int newnfs_commit_on_close = 0; +SYSCTL_INT(_vfs_newnfs, OID_AUTO, commit_on_close, CTLFLAG_RW, + &newnfs_commit_on_close, 0, "write+commit on close, else only write"); + +static int nfs_clean_pages_on_close = 1; +SYSCTL_INT(_vfs_newnfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW, + &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close"); + +int newnfs_directio_enable = 0; +SYSCTL_INT(_vfs_newnfs, OID_AUTO, directio_enable, CTLFLAG_RW, + &newnfs_directio_enable, 0, "Enable NFS directio"); + +static int newnfs_neglookup_enable = 1; +SYSCTL_INT(_vfs_newnfs, OID_AUTO, neglookup_enable, CTLFLAG_RW, + &newnfs_neglookup_enable, 0, "Enable NFS negative lookup caching"); + +/* + * This sysctl allows other processes to mmap a file that has been opened + * O_DIRECT by a process. In general, having processes mmap the file while + * Direct IO is in progress can lead to Data Inconsistencies. But, we allow + * this by default to prevent DoS attacks - to prevent a malicious user from + * opening up files O_DIRECT preventing other users from mmap'ing these + * files. "Protected" environments where stricter consistency guarantees are + * required can disable this knob. The process that opened the file O_DIRECT + * cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not + * meaningful. + */ +int newnfs_directio_allow_mmap = 1; +SYSCTL_INT(_vfs_newnfs, OID_AUTO, directio_allow_mmap, CTLFLAG_RW, + &newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens"); + +#if 0 +SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_hits, CTLFLAG_RD, + &newnfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count"); + +SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_misses, CTLFLAG_RD, + &newnfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count"); +#endif + +#define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \ + | NFSACCESS_EXTEND | NFSACCESS_EXECUTE \ + | NFSACCESS_DELETE | NFSACCESS_LOOKUP) + +/* + * SMP Locking Note : + * The list of locks after the description of the lock is the ordering + * of other locks acquired with the lock held. + * np->n_mtx : Protects the fields in the nfsnode. + VM Object Lock + VI_MTX (acquired indirectly) + * nmp->nm_mtx : Protects the fields in the nfsmount. + rep->r_mtx + * ncl_iod_mutex : Global lock, protects shared nfsiod state. + * nfs_reqq_mtx : Global lock, protects the nfs_reqq list. + nmp->nm_mtx + rep->r_mtx + * rep->r_mtx : Protects the fields in an nfsreq. + */ + +static int +nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td, + struct ucred *cred, u_int32_t *retmode) +{ + int error = 0, attrflag, i, lrupos; + u_int32_t rmode; + struct nfsnode *np = VTONFS(vp); + struct nfsvattr nfsva; + + error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag, + &rmode, NULL); + if (attrflag) + (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); + if (!error) { + lrupos = 0; + mtx_lock(&np->n_mtx); + for (i = 0; i < NFS_ACCESSCACHESIZE; i++) { + if (np->n_accesscache[i].uid == cred->cr_uid) { + np->n_accesscache[i].mode = rmode; + np->n_accesscache[i].stamp = time_second; + break; + } + if (i > 0 && np->n_accesscache[i].stamp < + np->n_accesscache[lrupos].stamp) + lrupos = i; + } + if (i == NFS_ACCESSCACHESIZE) { + np->n_accesscache[lrupos].uid = cred->cr_uid; + np->n_accesscache[lrupos].mode = rmode; + np->n_accesscache[lrupos].stamp = time_second; + } + mtx_unlock(&np->n_mtx); + if (retmode != NULL) + *retmode = rmode; + } else if (NFS_ISV4(vp)) { + error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); + } + return (error); +} + +/* + * nfs access vnode op. + * For nfs version 2, just return ok. File accesses may fail later. + * For nfs version 3, use the access rpc to check accessibility. If file modes + * are changed on the server, accesses might still fail later. + */ +static int +nfs_access(struct vop_access_args *ap) +{ + struct vnode *vp = ap->a_vp; + int error = 0, i, gotahit; + u_int32_t mode, wmode, rmode; + int v34 = NFS_ISV34(vp); + struct nfsnode *np = VTONFS(vp); + + /* + * Disallow write attempts on filesystems mounted read-only; + * unless the file is a socket, fifo, or a block or character + * device resident on the filesystem. + */ + if ((ap->a_accmode & (VWRITE | VAPPEND +#ifdef NFS4_ACL_EXTATTR_NAME + | VWRITE_NAMED_ATTRS | VDELETE_CHILD | VWRITE_ATTRIBUTES | + VDELETE | VWRITE_ACL | VWRITE_OWNER +#endif + )) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) { + switch (vp->v_type) { + case VREG: + case VDIR: + case VLNK: + return (EROFS); + default: + break; + } + } + /* + * For nfs v3 or v4, check to see if we have done this recently, and if + * so return our cached result instead of making an ACCESS call. + * If not, do an access rpc, otherwise you are stuck emulating + * ufs_access() locally using the vattr. This may not be correct, + * since the server may apply other access criteria such as + * client uid-->server uid mapping that we do not know about. + */ + if (v34) { + if (ap->a_accmode & VREAD) + mode = NFSACCESS_READ; + else + mode = 0; + if (vp->v_type != VDIR) { + if (ap->a_accmode & VWRITE) + mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND); + if (ap->a_accmode & VAPPEND) + mode |= NFSACCESS_EXTEND; + if (ap->a_accmode & VEXEC) + mode |= NFSACCESS_EXECUTE; +#ifdef NFS4_ACL_EXTATTR_NAME + if (ap->a_accmode & VDELETE) + mode |= NFSACCESS_DELETE; +#endif + } else { + if (ap->a_accmode & VWRITE) + mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND); + if (ap->a_accmode & VAPPEND) + mode |= NFSACCESS_EXTEND; + if (ap->a_accmode & VEXEC) + mode |= NFSACCESS_LOOKUP; +#ifdef NFS4_ACL_EXTATTR_NAME + if (ap->a_accmode & VDELETE) + mode |= NFSACCESS_DELETE; + if (ap->a_accmode & VDELETE_CHILD) + mode |= NFSACCESS_MODIFY; +#endif + } + /* XXX safety belt, only make blanket request if caching */ + if (nfsaccess_cache_timeout > 0) { + wmode = NFSACCESS_READ | NFSACCESS_MODIFY | + NFSACCESS_EXTEND | NFSACCESS_EXECUTE | + NFSACCESS_DELETE | NFSACCESS_LOOKUP; + } else { + wmode = mode; + } + + /* + * Does our cached result allow us to give a definite yes to + * this request? + */ + gotahit = 0; + mtx_lock(&np->n_mtx); + for (i = 0; i < NFS_ACCESSCACHESIZE; i++) { + if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) { + if (time_second < (np->n_accesscache[i].stamp + + nfsaccess_cache_timeout) && + (np->n_accesscache[i].mode & mode) == mode) { + NFSINCRGLOBAL(newnfsstats.accesscache_hits); + gotahit = 1; + } + break; + } + } + mtx_unlock(&np->n_mtx); + if (gotahit == 0) { + /* + * Either a no, or a don't know. Go to the wire. + */ + NFSINCRGLOBAL(newnfsstats.accesscache_misses); + error = nfs34_access_otw(vp, wmode, ap->a_td, + ap->a_cred, &rmode); + if (!error && + (rmode & mode) != mode) + error = EACCES; + } + return (error); + } else { + if ((error = nfsspec_access(ap)) != 0) { + return (error); + } + /* + * Attempt to prevent a mapped root from accessing a file + * which it shouldn't. We try to read a byte from the file + * if the user is root and the file is not zero length. + * After calling nfsspec_access, we should have the correct + * file size cached. + */ + mtx_lock(&np->n_mtx); + if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD) + && VTONFS(vp)->n_size > 0) { + struct iovec aiov; + struct uio auio; + char buf[1]; + + mtx_unlock(&np->n_mtx); + aiov.iov_base = buf; + aiov.iov_len = 1; + auio.uio_iov = &aiov; + auio.uio_iovcnt = 1; + auio.uio_offset = 0; + auio.uio_resid = 1; + auio.uio_segflg = UIO_SYSSPACE; + auio.uio_rw = UIO_READ; + auio.uio_td = ap->a_td; + + if (vp->v_type == VREG) + error = ncl_readrpc(vp, &auio, ap->a_cred); + else if (vp->v_type == VDIR) { + char* bp; + bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK); + aiov.iov_base = bp; + aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ; + error = ncl_readdirrpc(vp, &auio, ap->a_cred, + ap->a_td); + free(bp, M_TEMP); + } else if (vp->v_type == VLNK) + error = ncl_readlinkrpc(vp, &auio, ap->a_cred); + else + error = EACCES; + } else + mtx_unlock(&np->n_mtx); + return (error); + } +} + + +/* + * nfs open vnode op + * Check to see if the type is ok + * and that deletion is not in progress. + * For paged in text files, you will need to flush the page cache + * if consistency is lost. + */ +/* ARGSUSED */ +static int +nfs_open(struct vop_open_args *ap) +{ + struct vnode *vp = ap->a_vp; + struct nfsnode *np = VTONFS(vp); + struct vattr vattr; + int error; + int fmode = ap->a_mode; + + if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) + return (EOPNOTSUPP); + + /* + * For NFSv4, we need to do the Open Op before cache validation, + * so that we conform to RFC3530 Sec. 9.3.1. + */ + if (NFS_ISV4(vp)) { + error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td); + if (error) { + error = nfscl_maperr(ap->a_td, error, (uid_t)0, + (gid_t)0); + return (error); + } + } + + /* + * Now, if this Open will be doing reading, re-validate/flush the + * cache, so that Close/Open coherency is maintained. + */ + if ((fmode & FREAD) && (!NFS_ISV4(vp) || nfscl_mustflush(vp))) { + mtx_lock(&np->n_mtx); + if (np->n_flag & NMODIFIED) { + mtx_unlock(&np->n_mtx); + error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); + if (error == EINTR || error == EIO) { + if (NFS_ISV4(vp)) + (void) nfsrpc_close(vp, ap->a_cred, + ap->a_td); + return (error); + } + np->n_attrstamp = 0; + if (vp->v_type == VDIR) + np->n_direofoffset = 0; + error = VOP_GETATTR(vp, &vattr, ap->a_cred); + if (error) { + if (NFS_ISV4(vp)) + (void) nfsrpc_close(vp, ap->a_cred, + ap->a_td); + return (error); + } + mtx_lock(&np->n_mtx); + np->n_mtime = vattr.va_mtime; + if (NFS_ISV4(vp)) + np->n_change = vattr.va_filerev; + mtx_unlock(&np->n_mtx); + } else { + struct thread *td = curthread; + + if (np->n_ac_ts_syscalls != td->td_syscalls || + np->n_ac_ts_tid != td->td_tid || + td->td_proc == NULL || + np->n_ac_ts_pid != td->td_proc->p_pid) { + np->n_attrstamp = 0; + } + mtx_unlock(&np->n_mtx); + error = VOP_GETATTR(vp, &vattr, ap->a_cred); + if (error) { + if (NFS_ISV4(vp)) + (void) nfsrpc_close(vp, ap->a_cred, + ap->a_td); + return (error); + } + mtx_lock(&np->n_mtx); + if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) || + NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) { + if (vp->v_type == VDIR) + np->n_direofoffset = 0; + mtx_unlock(&np->n_mtx); + error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); + if (error == EINTR || error == EIO) { + if (NFS_ISV4(vp)) + (void) nfsrpc_close(vp, + ap->a_cred, ap->a_td); + return (error); + } + mtx_lock(&np->n_mtx); + np->n_mtime = vattr.va_mtime; + if (NFS_ISV4(vp)) + np->n_change = vattr.va_filerev; + } + mtx_unlock(&np->n_mtx); + } + } + + /* + * If the object has >= 1 O_DIRECT active opens, we disable caching. + */ + if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) { + if (np->n_directio_opens == 0) { + error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); + if (error) { + if (NFS_ISV4(vp)) + (void) nfsrpc_close(vp, ap->a_cred, + ap->a_td); + return (error); + } + mtx_lock(&np->n_mtx); + np->n_flag |= NNONCACHE; + } else { + mtx_lock(&np->n_mtx); + } + np->n_directio_opens++; + mtx_unlock(&np->n_mtx); + } + vnode_create_vobject(vp, vattr.va_size, ap->a_td); + return (0); +} + +/* + * nfs close vnode op + * What an NFS client should do upon close after writing is a debatable issue. + * Most NFS clients push delayed writes to the server upon close, basically for + * two reasons: + * 1 - So that any write errors may be reported back to the client process + * doing the close system call. By far the two most likely errors are + * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. + * 2 - To put a worst case upper bound on cache inconsistency between + * multiple clients for the file. + * There is also a consistency problem for Version 2 of the protocol w.r.t. + * not being able to tell if other clients are writing a file concurrently, + * since there is no way of knowing if the changed modify time in the reply + * is only due to the write for this client. + * (NFS Version 3 provides weak cache consistency data in the reply that + * should be sufficient to detect and handle this case.) + * + * The current code does the following: + * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers + * for NFS Version 3 - flush dirty buffers to the server but don't invalidate + * or commit them (this satisfies 1 and 2 except for the + * case where the server crashes after this close but + * before the commit RPC, which is felt to be "good + * enough". Changing the last argument to ncl_flush() to + * a 1 would force a commit operation, if it is felt a + * commit is necessary now. + * for NFS Version 4 - flush the dirty buffers and commit them, if + * nfscl_mustflush() says this is necessary. + * It is necessary if there is no write delegation held, + * in order to satisfy open/close coherency. + * If the file isn't cached on local stable storage, + * it may be necessary in order to detect "out of space" + * errors from the server, if the write delegation + * issued by the server doesn't allow the file to grow. + */ +/* ARGSUSED */ +static int +nfs_close(struct vop_close_args *ap) +{ + struct vnode *vp = ap->a_vp; + struct nfsnode *np = VTONFS(vp); + struct nfsvattr nfsva; + struct ucred *cred; + int error = 0, ret, localcred = 0; + int fmode = ap->a_fflag; + + if ((vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF)) + return (0); + /* + * During shutdown, a_cred isn't valid, so just use root. + */ + if (ap->a_cred == NOCRED) { + cred = newnfs_getcred(); + localcred = 1; + } else { + cred = ap->a_cred; + } + if (vp->v_type == VREG) { + /* + * Examine and clean dirty pages, regardless of NMODIFIED. + * This closes a major hole in close-to-open consistency. + * We want to push out all dirty pages (and buffers) on + * close, regardless of whether they were dirtied by + * mmap'ed writes or via write(). + */ + if (nfs_clean_pages_on_close && vp->v_object) { + VM_OBJECT_LOCK(vp->v_object); + vm_object_page_clean(vp->v_object, 0, 0, 0); + VM_OBJECT_UNLOCK(vp->v_object); + } + mtx_lock(&np->n_mtx); + if (np->n_flag & NMODIFIED) { + mtx_unlock(&np->n_mtx); + if (NFS_ISV3(vp)) { + /* + * Under NFSv3 we have dirty buffers to dispose of. We + * must flush them to the NFS server. We have the option + * of waiting all the way through the commit rpc or just + * waiting for the initial write. The default is to only + * wait through the initial write so the data is in the + * server's cache, which is roughly similar to the state + * a standard disk subsystem leaves the file in on close(). + * + * We cannot clear the NMODIFIED bit in np->n_flag due to + * potential races with other processes, and certainly + * cannot clear it if we don't commit. + * These races occur when there is no longer the old + * traditional vnode locking implemented for Vnode Ops. + */ + int cm = newnfs_commit_on_close ? 1 : 0; + error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td, cm); + /* np->n_flag &= ~NMODIFIED; */ + } else if (NFS_ISV4(vp)) { + int cm; + if (newnfs_commit_on_close != 0) + cm = 1; + else + cm = nfscl_mustflush(vp); + error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td, cm); + /* as above w.r.t. races when clearing NMODIFIED */ + /* np->n_flag &= ~NMODIFIED; */ + } else + error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1); + mtx_lock(&np->n_mtx); + } + /* + * Invalidate the attribute cache in all cases. + * An open is going to fetch fresh attrs any way, other procs + * on this node that have file open will be forced to do an + * otw attr fetch, but this is safe. + * --> A user found that their RPC count dropped by 20% when + * this was commented out and I can't see any requirement + * for it, so I've disabled it when negative lookups are + * enabled. (What does this have to do with negative lookup + * caching? Well nothing, except it was reported by the + * same user that needed negative lookup caching and I wanted + * there to be a way to disable it via sysctl to see if it + * is the cause of some caching/coherency issue that might + * crop up.) + */ + if (newnfs_neglookup_enable == 0) + np->n_attrstamp = 0; + if (np->n_flag & NWRITEERR) { + np->n_flag &= ~NWRITEERR; + error = np->n_error; + } + mtx_unlock(&np->n_mtx); + } + + if (NFS_ISV4(vp)) { + /* + * Get attributes so "change" is up to date. + */ + if (!error) { + ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva, + NULL); + if (!ret) { + np->n_change = nfsva.na_filerev; + (void) nfscl_loadattrcache(&vp, &nfsva, NULL, + NULL, 0, 0); + } + } + + /* + * and do the close. + */ + ret = nfsrpc_close(vp, cred, ap->a_td); + if (!error && ret) + error = ret; + if (error) + error = nfscl_maperr(ap->a_td, error, (uid_t)0, + (gid_t)0); + } + if (newnfs_directio_enable) + KASSERT((np->n_directio_asyncwr == 0), + ("nfs_close: dirty unflushed (%d) directio buffers\n", + np->n_directio_asyncwr)); + if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) { + mtx_lock(&np->n_mtx); + KASSERT((np->n_directio_opens > 0), + ("nfs_close: unexpectedly value (0) of n_directio_opens\n")); + np->n_directio_opens--; + if (np->n_directio_opens == 0) + np->n_flag &= ~NNONCACHE; + mtx_unlock(&np->n_mtx); + } + if (localcred) + NFSFREECRED(cred); + return (error); +} + +/* + * nfs getattr call from vfs. + */ +static int +nfs_getattr(struct vop_getattr_args *ap) +{ + struct vnode *vp = ap->a_vp; + struct thread *td = curthread; /* XXX */ + struct nfsnode *np = VTONFS(vp); + int error = 0; + struct nfsvattr nfsva; + struct vattr *vap = ap->a_vap; + struct vattr vattr; + + /* + * Update local times for special files. + */ + mtx_lock(&np->n_mtx); + if (np->n_flag & (NACC | NUPD)) + np->n_flag |= NCHG; + mtx_unlock(&np->n_mtx); + /* + * First look in the cache. + */ + if (ncl_getattrcache(vp, &vattr) == 0) { + vap->va_type = vattr.va_type; + vap->va_mode = vattr.va_mode; + vap->va_nlink = vattr.va_nlink; + vap->va_uid = vattr.va_uid; + vap->va_gid = vattr.va_gid; + vap->va_fsid = vattr.va_fsid; + vap->va_fileid = vattr.va_fileid; + vap->va_size = vattr.va_size; + vap->va_blocksize = vattr.va_blocksize; + vap->va_atime = vattr.va_atime; + vap->va_mtime = vattr.va_mtime; + vap->va_ctime = vattr.va_ctime; + vap->va_gen = vattr.va_gen; + vap->va_flags = vattr.va_flags; + vap->va_rdev = vattr.va_rdev; + vap->va_bytes = vattr.va_bytes; + vap->va_filerev = vattr.va_filerev; + /* + * Get the local modify time for the case of a write + * delegation. + */ + nfscl_deleggetmodtime(vp, &vap->va_mtime); + return (0); + } + + if (NFS_ISV34(vp) && nfs_prime_access_cache && + nfsaccess_cache_timeout > 0) { + NFSINCRGLOBAL(newnfsstats.accesscache_misses); + nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL); + if (ncl_getattrcache(vp, ap->a_vap) == 0) { + nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime); + return (0); + } + } + error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva, NULL); + if (!error) + error = nfscl_loadattrcache(&vp, &nfsva, vap, NULL, 0, 0); + if (!error) { + /* + * Get the local modify time for the case of a write + * delegation. + */ + nfscl_deleggetmodtime(vp, &vap->va_mtime); + } else if (NFS_ISV4(vp)) { + error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); + } + return (error); +} + +/* + * nfs setattr call. + */ +static int +nfs_setattr(struct vop_setattr_args *ap) +{ + struct vnode *vp = ap->a_vp; + struct nfsnode *np = VTONFS(vp); + struct thread *td = curthread; /* XXX */ + struct vattr *vap = ap->a_vap; + int error = 0; + u_quad_t tsize; + +#ifndef nolint + tsize = (u_quad_t)0; +#endif + + /* + * Setting of flags and marking of atimes are not supported. + */ + if (vap->va_flags != VNOVAL) + return (EOPNOTSUPP); + + /* + * Disallow write attempts if the filesystem is mounted read-only. + */ + if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || + vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || + vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && + (vp->v_mount->mnt_flag & MNT_RDONLY)) + return (EROFS); + if (vap->va_size != VNOVAL) { + switch (vp->v_type) { + case VDIR: + return (EISDIR); + case VCHR: + case VBLK: + case VSOCK: + case VFIFO: + if (vap->va_mtime.tv_sec == VNOVAL && + vap->va_atime.tv_sec == VNOVAL && + vap->va_mode == (mode_t)VNOVAL && + vap->va_uid == (uid_t)VNOVAL && + vap->va_gid == (gid_t)VNOVAL) + return (0); + vap->va_size = VNOVAL; + break; + default: + /* + * Disallow write attempts if the filesystem is + * mounted read-only. + */ + if (vp->v_mount->mnt_flag & MNT_RDONLY) + return (EROFS); + /* + * We run vnode_pager_setsize() early (why?), + * we must set np->n_size now to avoid vinvalbuf + * V_SAVE races that might setsize a lower + * value. + */ + mtx_lock(&np->n_mtx); + tsize = np->n_size; + mtx_unlock(&np->n_mtx); + error = ncl_meta_setsize(vp, ap->a_cred, td, + vap->va_size); + mtx_lock(&np->n_mtx); + if (np->n_flag & NMODIFIED) { + tsize = np->n_size; + mtx_unlock(&np->n_mtx); + if (vap->va_size == 0) + error = ncl_vinvalbuf(vp, 0, td, 1); + else + error = ncl_vinvalbuf(vp, V_SAVE, td, 1); + if (error) { + vnode_pager_setsize(vp, tsize); + return (error); + } + /* + * Call nfscl_delegmodtime() to set the modify time + * locally, as required. + */ + nfscl_delegmodtime(vp); + } else + mtx_unlock(&np->n_mtx); + /* + * np->n_size has already been set to vap->va_size + * in ncl_meta_setsize(). We must set it again since + * nfs_loadattrcache() could be called through + * ncl_meta_setsize() and could modify np->n_size. + */ + mtx_lock(&np->n_mtx); + np->n_vattr.na_size = np->n_size = vap->va_size; + mtx_unlock(&np->n_mtx); + }; + } else { + mtx_lock(&np->n_mtx); + if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) && + (np->n_flag & NMODIFIED) && vp->v_type == VREG) { + mtx_unlock(&np->n_mtx); + if ((error = ncl_vinvalbuf(vp, V_SAVE, td, 1)) != 0 && + (error == EINTR || error == EIO)) + return (error); + } else + mtx_unlock(&np->n_mtx); + } + error = nfs_setattrrpc(vp, vap, ap->a_cred, td); + if (error && vap->va_size != VNOVAL) { + mtx_lock(&np->n_mtx); + np->n_size = np->n_vattr.na_size = tsize; + vnode_pager_setsize(vp, tsize); + mtx_unlock(&np->n_mtx); + } + return (error); +} + +/* + * Do an nfs setattr rpc. + */ +static int +nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred, + struct thread *td) +{ + struct nfsnode *np = VTONFS(vp); + int error, ret, attrflag, i; + struct nfsvattr nfsva; + + if (NFS_ISV34(vp)) { + mtx_lock(&np->n_mtx); + for (i = 0; i < NFS_ACCESSCACHESIZE; i++) + np->n_accesscache[i].stamp = 0; + np->n_flag |= NDELEGMOD; + mtx_unlock(&np->n_mtx); + } + error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag, + NULL); + if (attrflag) { + ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); + if (ret && !error) + error = ret; + } + if (error && NFS_ISV4(vp)) + error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid); + return (error); +} + +/* + * nfs lookup call, one step at a time... + * First look in cache + * If not found, unlock the directory nfsnode and do the rpc + */ +static int +nfs_lookup(struct vop_lookup_args *ap) +{ + struct componentname *cnp = ap->a_cnp; + struct vnode *dvp = ap->a_dvp; + struct vnode **vpp = ap->a_vpp; + int flags = cnp->cn_flags; + struct vnode *newvp; + struct nfsmount *nmp; + struct nfsnode *np; + int error = 0, attrflag, dattrflag; + struct thread *td = cnp->cn_thread; + struct nfsfh *nfhp; + struct nfsvattr dnfsva, nfsva; + + *vpp = NULLVP; + if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && + (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) + return (EROFS); + if (dvp->v_type != VDIR) + return (ENOTDIR); + nmp = VFSTONFS(dvp->v_mount); + np = VTONFS(dvp); + + /* For NFSv4, wait until any remove is done. */ + mtx_lock(&np->n_mtx); + while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) { + np->n_flag |= NREMOVEWANT; + (void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0); + } + mtx_unlock(&np->n_mtx); + + if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) + return (error); + if ((error = cache_lookup(dvp, vpp, cnp)) && + (error != ENOENT || newnfs_neglookup_enable != 0)) { + struct vattr vattr; + + if (error == ENOENT) { + if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred) && + vattr.va_mtime.tv_sec == np->n_dmtime) { + NFSINCRGLOBAL(newnfsstats.lookupcache_hits); + return (ENOENT); + } + cache_purge_negative(dvp); + np->n_dmtime = 0; + } else { + newvp = *vpp; + if (nfscl_nodeleg(newvp, 0) == 0 || + (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred) && + vattr.va_ctime.tv_sec==VTONFS(newvp)->n_ctime)) { + NFSINCRGLOBAL(newnfsstats.lookupcache_hits); + if (cnp->cn_nameiop != LOOKUP && + (flags & ISLASTCN)) + cnp->cn_flags |= SAVENAME; + return (0); + } + cache_purge(newvp); + if (dvp != newvp) + vput(newvp); + else + vrele(newvp); + *vpp = NULLVP; + } + } + error = 0; + newvp = NULLVP; + NFSINCRGLOBAL(newnfsstats.lookupcache_misses); + error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen, + cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, + NULL); + if (dattrflag) + (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); + if (error) { + if (newnfs_neglookup_enable != 0 && + error == ENOENT && (cnp->cn_flags & MAKEENTRY) && + cnp->cn_nameiop != CREATE) { + if (np->n_dmtime == 0) + np->n_dmtime = np->n_vattr.na_mtime.tv_sec; + cache_enter(dvp, NULL, cnp); + } + if (newvp != NULLVP) { + vput(newvp); + *vpp = NULLVP; + } + if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && + (flags & ISLASTCN) && error == ENOENT) { + if (dvp->v_mount->mnt_flag & MNT_RDONLY) + error = EROFS; + else + error = EJUSTRETURN; + } + if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) + cnp->cn_flags |= SAVENAME; + if (NFS_ISV4(dvp)) + error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); + return (error); + } + + /* + * Handle RENAME case... + */ + if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { + if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) { + FREE((caddr_t)nfhp, M_NFSFH); + return (EISDIR); + } + error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, td, &np, + NULL); + if (error) + return (error); + newvp = NFSTOV(np); + if (attrflag) + (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, + 0, 1); + *vpp = newvp; + cnp->cn_flags |= SAVENAME; + return (0); + } + + if ((flags & ISDOTDOT)) { + VOP_UNLOCK(dvp, 0); + error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, td, &np, + NULL); + vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); + if (error) + return (error); + newvp = NFSTOV(np); + if (attrflag) + (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, + 0, 1); + } else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) { + FREE((caddr_t)nfhp, M_NFSFH); + VREF(dvp); + newvp = dvp; + if (attrflag) + (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, + 0, 1); + } else { + error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, td, &np, + NULL); + if (error) + return (error); + newvp = NFSTOV(np); + if (attrflag) + (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, + 0, 1); + } + if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) + cnp->cn_flags |= SAVENAME; + if ((cnp->cn_flags & MAKEENTRY) && + (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { + np->n_ctime = np->n_vattr.na_vattr.va_ctime.tv_sec; + cache_enter(dvp, newvp, cnp); + } + *vpp = newvp; + return (0); +} + +/* + * nfs read call. + * Just call ncl_bioread() to do the work. + */ +static int +nfs_read(struct vop_read_args *ap) +{ + struct vnode *vp = ap->a_vp; + + switch (vp->v_type) { + case VREG: + return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred)); + case VDIR: + return (EISDIR); + default: + return (EOPNOTSUPP); + } +} + +/* + * nfs readlink call + */ +static int +nfs_readlink(struct vop_readlink_args *ap) +{ + struct vnode *vp = ap->a_vp; + + if (vp->v_type != VLNK) + return (EINVAL); + return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred)); +} + +/* + * Do a readlink rpc. + * Called by ncl_doio() from below the buffer cache. + */ +int +ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) +{ + int error, ret, attrflag; + struct nfsvattr nfsva; + + error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva, + &attrflag, NULL); + if (attrflag) { + ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); + if (ret && !error) + error = ret; + } + if (error && NFS_ISV4(vp)) + error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); + return (error); +} + +/* + * nfs read rpc call + * Ditto above + */ +int +ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) +{ + int error, ret, attrflag; + struct nfsvattr nfsva; + + error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva, &attrflag, + NULL); + if (attrflag) { + ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); + if (ret && !error) + error = ret; + } + if (error && NFS_ISV4(vp)) + error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); + return (error); +} + +/* + * nfs write call + */ +int +ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, + int *iomode, int *must_commit) +{ + struct nfsvattr nfsva; + int error = 0, attrflag, ret; + u_char verf[NFSX_VERF]; + struct nfsmount *nmp = VFSTONFS(vp->v_mount); + + *must_commit = 0; + error = nfsrpc_write(vp, uiop, iomode, verf, cred, + uiop->uio_td, &nfsva, &attrflag, NULL); + NFSLOCKMNT(nmp); + if (!error && NFSHASWRITEVERF(nmp) && + NFSBCMP(verf, nmp->nm_verf, NFSX_VERF)) { + *must_commit = 1; + NFSBCOPY(verf, nmp->nm_verf, NFSX_VERF); + } + NFSUNLOCKMNT(nmp); + if (attrflag) { + if (VTONFS(vp)->n_flag & ND_NFSV4) + ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 1, + 1); + else + ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, + 1); + if (ret && !error) + error = ret; + } + if (vp->v_mount->mnt_kern_flag & MNTK_ASYNC) + *iomode = NFSWRITE_FILESYNC; + if (error && NFS_ISV4(vp)) + error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0); + return (error); +} + +/* + * nfs mknod rpc + * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the + * mode set to specify the file type and the size field for rdev. + */ +static int +nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, + struct vattr *vap) +{ + struct nfsvattr nfsva, dnfsva; + struct vnode *newvp = NULL; + struct nfsnode *np = NULL, *dnp; + struct nfsfh *nfhp; + struct vattr vattr; + int error = 0, attrflag, dattrflag; + u_int32_t rdev; + + if (vap->va_type == VCHR || vap->va_type == VBLK) + rdev = vap->va_rdev; + else if (vap->va_type == VFIFO || vap->va_type == VSOCK) + rdev = 0xffffffff; + else + return (EOPNOTSUPP); + if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) + return (error); + error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap, + rdev, vap->va_type, cnp->cn_cred, cnp->cn_thread, &dnfsva, + &nfsva, &nfhp, &attrflag, &dattrflag, NULL); + if (!error) { + if (!nfhp) + (void) nfsrpc_lookup(dvp, cnp->cn_nameptr, + cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread, + &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, + NULL); + if (nfhp) + error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, + cnp->cn_thread, &np, NULL); + } + if (dattrflag) + (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); + if (!error) { + newvp = NFSTOV(np); + if (attrflag) + error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, + 0, 1); + } + if (!error) { + if ((cnp->cn_flags & MAKEENTRY)) + cache_enter(dvp, newvp, cnp); + *vpp = newvp; + } else if (NFS_ISV4(dvp)) { + error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid, + vap->va_gid); + } + dnp = VTONFS(dvp); + mtx_lock(&dnp->n_mtx); + dnp->n_flag |= NMODIFIED; + if (!dattrflag) + dnp->n_attrstamp = 0; + mtx_unlock(&dnp->n_mtx); + return (error); +} + +/* + * nfs mknod vop + * just call nfs_mknodrpc() to do the work. + */ +/* ARGSUSED */ +static int +nfs_mknod(struct vop_mknod_args *ap) +{ + return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap)); +} + +static u_long create_verf; +/* + * nfs file create call + */ +static int +nfs_create(struct vop_create_args *ap) +{ + struct vnode *dvp = ap->a_dvp; + struct vattr *vap = ap->a_vap; + struct componentname *cnp = ap->a_cnp; + struct nfsnode *np = NULL, *dnp; + struct vnode *newvp = NULL; + struct nfsmount *nmp; + struct nfsvattr dnfsva, nfsva; + struct nfsfh *nfhp; + nfsquad_t cverf; + int error = 0, attrflag, dattrflag, fmode = 0; + struct vattr vattr; + + /* + * Oops, not for me.. + */ + if (vap->va_type == VSOCK) + return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); + + if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) + return (error); + if (vap->va_vaflags & VA_EXCLUSIVE) + fmode |= O_EXCL; + dnp = VTONFS(dvp); + nmp = VFSTONFS(vnode_mount(dvp)); +again: + /* For NFSv4, wait until any remove is done. */ + mtx_lock(&dnp->n_mtx); + while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) { + dnp->n_flag |= NREMOVEWANT; + (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0); + } + mtx_unlock(&dnp->n_mtx); + + CURVNET_SET(nmp->nm_sockreq.nr_so->so_vnet); +#ifdef INET + INIT_VNET_INET(curvnet); + if (!TAILQ_EMPTY(&V_in_ifaddrhead)) + cverf.lval[0] = IA_SIN(TAILQ_FIRST(&V_in_ifaddrhead))->sin_addr.s_addr; + else +#endif + cverf.lval[0] = create_verf; + cverf.lval[1] = ++create_verf; + CURVNET_RESTORE(); + error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen, + vap, cverf, fmode, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, + &nfhp, &attrflag, &dattrflag, NULL); + if (!error) { + if (nfhp == NULL) + (void) nfsrpc_lookup(dvp, cnp->cn_nameptr, + cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread, + &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, + NULL); + if (nfhp != NULL) + error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, + cnp->cn_thread, &np, NULL); + } + if (dattrflag) + (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); + if (!error) { + newvp = NFSTOV(np); + if (attrflag) + error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, + 0, 1); + } + if (error) { + if (newvp != NULL) { + vrele(newvp); + newvp = NULL; + } + if (NFS_ISV34(dvp) && (fmode & O_EXCL) && + error == NFSERR_NOTSUPP) { + fmode &= ~O_EXCL; + goto again; + } + } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) { + if (nfscl_checksattr(vap, &nfsva)) { + error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred, + cnp->cn_thread, &nfsva, &attrflag, NULL); + if (error && (vap->va_uid != (uid_t)VNOVAL || + vap->va_gid != (gid_t)VNOVAL)) { + /* try again without setting uid/gid */ + vap->va_uid = (uid_t)VNOVAL; + vap->va_gid = (uid_t)VNOVAL; + error = nfsrpc_setattr(newvp, vap, NULL, + cnp->cn_cred, cnp->cn_thread, &nfsva, + &attrflag, NULL); + } + if (attrflag) + (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, + NULL, 0, 1); + } + } + if (!error) { + if (cnp->cn_flags & MAKEENTRY) + cache_enter(dvp, newvp, cnp); + *ap->a_vpp = newvp; + } else if (NFS_ISV4(dvp)) { + error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid, + vap->va_gid); + } + mtx_lock(&dnp->n_mtx); + dnp->n_flag |= NMODIFIED; + if (!dattrflag) + dnp->n_attrstamp = 0; + mtx_unlock(&dnp->n_mtx); + return (error); +} + +/* + * nfs file remove call + * To try and make nfs semantics closer to ufs semantics, a file that has + * other processes using the vnode is renamed instead of removed and then + * removed later on the last close. + * - If v_usecount > 1 + * If a rename is not already in the works + * call nfs_sillyrename() to set it up + * else + * do the remove rpc + */ +static int +nfs_remove(struct vop_remove_args *ap) +{ + struct vnode *vp = ap->a_vp; + struct vnode *dvp = ap->a_dvp; + struct componentname *cnp = ap->a_cnp; + struct nfsnode *np = VTONFS(vp); + int error = 0; + struct vattr vattr; + +#ifndef DIAGNOSTIC + if ((cnp->cn_flags & HASBUF) == 0) + panic("nfs_remove: no name"); + if (vrefcnt(vp) < 1) + panic("nfs_remove: bad v_usecount"); +#endif + if (vp->v_type == VDIR) + error = EPERM; + else if (vrefcnt(vp) == 1 || (np->n_sillyrename && + VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 && + vattr.va_nlink > 1)) { + /* + * Purge the name cache so that the chance of a lookup for + * the name succeeding while the remove is in progress is + * minimized. Without node locking it can still happen, such + * that an I/O op returns ESTALE, but since you get this if + * another host removes the file.. + */ + cache_purge(vp); + /* + * throw away biocache buffers, mainly to avoid + * unnecessary delayed writes later. + */ + error = ncl_vinvalbuf(vp, 0, cnp->cn_thread, 1); + /* Do the rpc */ + if (error != EINTR && error != EIO) + error = nfs_removerpc(dvp, vp, cnp->cn_nameptr, + cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread); + /* + * 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; + } else if (!np->n_sillyrename) + error = nfs_sillyrename(dvp, vp, cnp); + np->n_attrstamp = 0; + return (error); +} + +/* + * nfs file remove rpc called from nfs_inactive + */ +int +ncl_removeit(struct sillyrename *sp, struct vnode *vp) +{ + /* + * Make sure that the directory vnode is still valid. + * XXX we should lock sp->s_dvp here. + */ + if (sp->s_dvp->v_type == VBAD) + return (0); + return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen, + sp->s_cred, NULL)); +} + +/* + * Nfs remove rpc, called from nfs_remove() and ncl_removeit(). + */ +static int +nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name, + int namelen, struct ucred *cred, struct thread *td) +{ + struct nfsvattr dnfsva; + struct nfsnode *dnp = VTONFS(dvp); + int error = 0, dattrflag; + + mtx_lock(&dnp->n_mtx); + dnp->n_flag |= NREMOVEINPROG; + mtx_unlock(&dnp->n_mtx); + error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva, + &dattrflag, NULL); + mtx_lock(&dnp->n_mtx); + if ((dnp->n_flag & NREMOVEWANT)) { + dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG); + mtx_unlock(&dnp->n_mtx); + wakeup((caddr_t)dnp); + } else { + dnp->n_flag &= ~NREMOVEINPROG; + mtx_unlock(&dnp->n_mtx); + } + if (dattrflag) + (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); + mtx_lock(&dnp->n_mtx); + dnp->n_flag |= NMODIFIED; + if (!dattrflag) + dnp->n_attrstamp = 0; + mtx_unlock(&dnp->n_mtx); + if (error && NFS_ISV4(dvp)) + error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); + return (error); +} + +/* + * nfs file rename call + */ +static int +nfs_rename(struct vop_rename_args *ap) +{ + struct vnode *fvp = ap->a_fvp; + struct vnode *tvp = ap->a_tvp; + struct vnode *fdvp = ap->a_fdvp; + struct vnode *tdvp = ap->a_tdvp; + struct componentname *tcnp = ap->a_tcnp; + struct componentname *fcnp = ap->a_fcnp; + struct nfsnode *fnp = VTONFS(ap->a_fvp); + struct nfsnode *tdnp = VTONFS(ap->a_tdvp); + struct nfsv4node *newv4 = NULL; + int error; + +#ifndef DIAGNOSTIC + if ((tcnp->cn_flags & HASBUF) == 0 || + (fcnp->cn_flags & HASBUF) == 0) + panic("nfs_rename: no name"); +#endif + /* Check for cross-device rename */ + if ((fvp->v_mount != tdvp->v_mount) || + (tvp && (fvp->v_mount != tvp->v_mount))) { + error = EXDEV; + goto out; + } + + if (fvp == tvp) { + ncl_printf("nfs_rename: fvp == tvp (can't happen)\n"); + error = 0; + goto out; + } + if ((error = vn_lock(fvp, LK_EXCLUSIVE))) + goto out; + + /* + * We have to flush B_DELWRI data prior to renaming + * the file. If we don't, the delayed-write buffers + * can be flushed out later after the file has gone stale + * under NFSV3. NFSV2 does not have this problem because + * ( as far as I can tell ) it flushes dirty buffers more + * often. + * + * Skip the rename operation if the fsync fails, this can happen + * due to the server's volume being full, when we pushed out data + * that was written back to our cache earlier. Not checking for + * this condition can result in potential (silent) data loss. + */ + error = VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread); + VOP_UNLOCK(fvp, 0); + if (!error && tvp) + error = VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread); + if (error) + goto out; + + /* + * If the tvp exists and is in use, sillyrename it before doing the + * rename of the new file over it. + * XXX Can't sillyrename a directory. + */ + if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename && + tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { + vput(tvp); + tvp = NULL; + } + + error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen, + tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, + tcnp->cn_thread); + + if (!error) { + /* + * For NFSv4, check to see if it is the same name and + * replace the name, if it is different. + */ + MALLOC(newv4, struct nfsv4node *, + sizeof (struct nfsv4node) + + tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1, + M_NFSV4NODE, M_WAITOK); + mtx_lock(&tdnp->n_mtx); + mtx_lock(&fnp->n_mtx); + if (fnp->n_v4 != NULL && fvp->v_type == VREG && + (fnp->n_v4->n4_namelen != tcnp->cn_namelen || + NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4), + tcnp->cn_namelen) || + tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen || + NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data, + tdnp->n_fhp->nfh_len))) { +#ifdef notdef +{ char nnn[100]; int nnnl; +nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99; +bcopy(tcnp->cn_nameptr, nnn, nnnl); +nnn[nnnl] = '\0'; +printf("ren replace=%s\n",nnn); +} +#endif + FREE((caddr_t)fnp->n_v4, M_NFSV4NODE); + fnp->n_v4 = newv4; + newv4 = NULL; + fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len; + fnp->n_v4->n4_namelen = tcnp->cn_namelen; + NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data, + tdnp->n_fhp->nfh_len); + NFSBCOPY(tcnp->cn_nameptr, + NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen); + } + mtx_unlock(&tdnp->n_mtx); + mtx_unlock(&fnp->n_mtx); + if (newv4 != NULL) + FREE((caddr_t)newv4, M_NFSV4NODE); + } + + if (fvp->v_type == VDIR) { + if (tvp != NULL && tvp->v_type == VDIR) + cache_purge(tdvp); + cache_purge(fdvp); + } + +out: + if (tdvp == tvp) + vrele(tdvp); + else + vput(tdvp); + if (tvp) + vput(tvp); + vrele(fdvp); + vrele(fvp); + /* + * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. + */ + if (error == ENOENT) + error = 0; + return (error); +} + +/* + * nfs file rename rpc called from nfs_remove() above + */ +static int +nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp, + struct sillyrename *sp) +{ + + return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen, + sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred, + scnp->cn_thread)); +} + +/* + * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). + */ +static int +nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr, + int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr, + int tnamelen, struct ucred *cred, struct thread *td) +{ + struct nfsvattr fnfsva, tnfsva; + struct nfsnode *fdnp = VTONFS(fdvp); + struct nfsnode *tdnp = VTONFS(tdvp); + int error = 0, fattrflag, tattrflag; + + error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp, + tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag, + &tattrflag, NULL, NULL); + mtx_lock(&fdnp->n_mtx); + fdnp->n_flag |= NMODIFIED; + mtx_unlock(&fdnp->n_mtx); + mtx_lock(&tdnp->n_mtx); + tdnp->n_flag |= NMODIFIED; + mtx_unlock(&tdnp->n_mtx); + if (fattrflag) + (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, NULL, 0, 1); + else + fdnp->n_attrstamp = 0; + if (tattrflag) + (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, NULL, 0, 1); + else + tdnp->n_attrstamp = 0; + if (error && NFS_ISV4(fdvp)) + error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); + return (error); +} + +/* + * nfs hard link create call + */ +static int +nfs_link(struct vop_link_args *ap) +{ + struct vnode *vp = ap->a_vp; + struct vnode *tdvp = ap->a_tdvp; + struct componentname *cnp = ap->a_cnp; + struct nfsnode *tdnp; + struct nfsvattr nfsva, dnfsva; + int error = 0, attrflag, dattrflag; + + if (vp->v_mount != tdvp->v_mount) { + return (EXDEV); + } + + /* + * Push all writes to the server, so that the attribute cache + * doesn't get "out of sync" with the server. + * XXX There should be a better way! + */ + VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread); + + error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen, + cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &attrflag, + &dattrflag, NULL); + tdnp = VTONFS(tdvp); + mtx_lock(&tdnp->n_mtx); + tdnp->n_flag |= NMODIFIED; + mtx_unlock(&tdnp->n_mtx); + if (attrflag) + (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); + else + VTONFS(vp)->n_attrstamp = 0; + if (dattrflag) + (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, NULL, 0, 1); + else + tdnp->n_attrstamp = 0; + /* + * If negative lookup caching is enabled, I might as well + * add an entry for this node. Not necessary for correctness, + * but if negative caching is enabled, then the system + * must care about lookup caching hit rate, so... + */ + if (newnfs_neglookup_enable != 0 && + (cnp->cn_flags & MAKEENTRY)) + cache_enter(tdvp, vp, cnp); + if (error && NFS_ISV4(vp)) + error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0, + (gid_t)0); + return (error); +} + +/* + * nfs symbolic link create call + */ +static int +nfs_symlink(struct vop_symlink_args *ap) +{ + struct vnode *dvp = ap->a_dvp; + struct vattr *vap = ap->a_vap; + struct componentname *cnp = ap->a_cnp; + struct nfsvattr nfsva, dnfsva; + struct nfsfh *nfhp; + struct nfsnode *np = NULL, *dnp; + struct vnode *newvp = NULL; + int error = 0, attrflag, dattrflag, ret; + + vap->va_type = VLNK; + error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen, + ap->a_target, vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, + &nfsva, &nfhp, &attrflag, &dattrflag, NULL); + if (nfhp) { + ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread, + &np, NULL); + if (!ret) + newvp = NFSTOV(np); + else if (!error) + error = ret; + } + if (newvp != NULL) { + if (attrflag) + (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, + 0, 1); + } else if (!error) { + /* + * If we do not have an error and we could not extract the + * newvp from the response due to the request being NFSv2, we + * have to do a lookup in order to obtain a newvp to return. + */ + error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, + cnp->cn_cred, cnp->cn_thread, &np); + if (!error) + newvp = NFSTOV(np); + } + if (error) { + if (newvp) + vput(newvp); + if (NFS_ISV4(dvp)) + error = nfscl_maperr(cnp->cn_thread, error, + vap->va_uid, vap->va_gid); + } else { + /* + * If negative lookup caching is enabled, I might as well + * add an entry for this node. Not necessary for correctness, + * but if negative caching is enabled, then the system + * must care about lookup caching hit rate, so... + */ + if (newnfs_neglookup_enable != 0 && + (cnp->cn_flags & MAKEENTRY)) + cache_enter(dvp, newvp, cnp); + *ap->a_vpp = newvp; + } + + dnp = VTONFS(dvp); + mtx_lock(&dnp->n_mtx); + dnp->n_flag |= NMODIFIED; + mtx_unlock(&dnp->n_mtx); + if (dattrflag) + (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); + else + dnp->n_attrstamp = 0; + return (error); +} + +/* + * nfs make dir call + */ +static int +nfs_mkdir(struct vop_mkdir_args *ap) +{ + struct vnode *dvp = ap->a_dvp; + struct vattr *vap = ap->a_vap; + struct componentname *cnp = ap->a_cnp; + struct nfsnode *np = NULL, *dnp; + struct vnode *newvp = NULL; + struct vattr vattr; + struct nfsfh *nfhp; + struct nfsvattr nfsva, dnfsva; + int error = 0, attrflag, dattrflag, ret; + + if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) + return (error); + vap->va_type = VDIR; + error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen, + vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &nfhp, + &attrflag, &dattrflag, NULL); + dnp = VTONFS(dvp); + mtx_lock(&dnp->n_mtx); + dnp->n_flag |= NMODIFIED; + mtx_unlock(&dnp->n_mtx); + if (dattrflag) + (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); + else + dnp->n_attrstamp = 0; + if (nfhp) { + ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread, + &np, NULL); + if (!ret) { + newvp = NFSTOV(np); + if (attrflag) + (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, + NULL, 0, 1); + } else if (!error) + error = ret; + } + if (!error && newvp == NULL) { + error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, + cnp->cn_cred, cnp->cn_thread, &np); + if (!error) { + newvp = NFSTOV(np); + if (newvp->v_type != VDIR) + error = EEXIST; + } + } + if (error) { + if (newvp) + vput(newvp); + if (NFS_ISV4(dvp)) + error = nfscl_maperr(cnp->cn_thread, error, + vap->va_uid, vap->va_gid); + } else { + /* + * If negative lookup caching is enabled, I might as well + * add an entry for this node. Not necessary for correctness, + * but if negative caching is enabled, then the system + * must care about lookup caching hit rate, so... + */ + if (newnfs_neglookup_enable != 0 && + (cnp->cn_flags & MAKEENTRY)) + cache_enter(dvp, newvp, cnp); + *ap->a_vpp = newvp; + } + return (error); +} + +/* + * nfs remove directory call + */ +static int +nfs_rmdir(struct vop_rmdir_args *ap) +{ + struct vnode *vp = ap->a_vp; + struct vnode *dvp = ap->a_dvp; + struct componentname *cnp = ap->a_cnp; + struct nfsnode *dnp; + struct nfsvattr dnfsva; + int error, dattrflag; + + if (dvp == vp) + return (EINVAL); + error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen, + cnp->cn_cred, cnp->cn_thread, &dnfsva, &dattrflag, NULL); + dnp = VTONFS(dvp); + mtx_lock(&dnp->n_mtx); + dnp->n_flag |= NMODIFIED; + mtx_unlock(&dnp->n_mtx); + if (dattrflag) + (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); + else + dnp->n_attrstamp = 0; + + cache_purge(dvp); + cache_purge(vp); + if (error && NFS_ISV4(dvp)) + error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0, + (gid_t)0); + /* + * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. + */ + if (error == ENOENT) + error = 0; + return (error); +} + +/* + * nfs readdir call + */ +static int +nfs_readdir(struct vop_readdir_args *ap) +{ + struct vnode *vp = ap->a_vp; + struct nfsnode *np = VTONFS(vp); + struct uio *uio = ap->a_uio; + int tresid, error = 0; + struct vattr vattr; + + if (vp->v_type != VDIR) + return(EPERM); + + /* + * First, check for hit on the EOF offset cache + */ + if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && + (np->n_flag & NMODIFIED) == 0) { + if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) { + mtx_lock(&np->n_mtx); + if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) || + !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) { + mtx_unlock(&np->n_mtx); + NFSINCRGLOBAL(newnfsstats.direofcache_hits); + return (0); + } else + mtx_unlock(&np->n_mtx); + } + } + + /* + * Call ncl_bioread() to do the real work. + */ + tresid = uio->uio_resid; + error = ncl_bioread(vp, uio, 0, ap->a_cred); + + if (!error && uio->uio_resid == tresid) + NFSINCRGLOBAL(newnfsstats.direofcache_misses); + return (error); +} + +/* + * Readdir rpc call. + * Called from below the buffer cache by ncl_doio(). + */ +int +ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, + struct thread *td) +{ + struct nfsvattr nfsva; + nfsuint64 *cookiep, cookie; + struct nfsnode *dnp = VTONFS(vp); + struct nfsmount *nmp = VFSTONFS(vp->v_mount); + int error = 0, eof, attrflag; + +#ifndef DIAGNOSTIC + if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || + (uiop->uio_resid & (DIRBLKSIZ - 1))) + panic("nfs readdirrpc bad uio"); +#endif + + /* + * If there is no cookie, assume directory was stale. + */ + ncl_dircookie_lock(dnp); + cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0); + if (cookiep) { + cookie = *cookiep; + ncl_dircookie_unlock(dnp); + } else { + ncl_dircookie_unlock(dnp); + return (NFSERR_BAD_COOKIE); + } + + if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) + (void)ncl_fsinfo(nmp, vp, cred, td); + + error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva, + &attrflag, &eof, NULL); + if (attrflag) + (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); + + if (!error) { + /* + * We are now either at the end of the directory or have filled + * the block. + */ + if (eof) + dnp->n_direofoffset = uiop->uio_offset; + else { + if (uiop->uio_resid > 0) + ncl_printf("EEK! readdirrpc resid > 0\n"); + ncl_dircookie_lock(dnp); + cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1); + *cookiep = cookie; + ncl_dircookie_unlock(dnp); + } + } else if (NFS_ISV4(vp)) { + error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); + } + return (error); +} + +/* + * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc(). + */ +int +ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, + struct thread *td) +{ + struct nfsvattr nfsva; + nfsuint64 *cookiep, cookie; + struct nfsnode *dnp = VTONFS(vp); + struct nfsmount *nmp = VFSTONFS(vp->v_mount); + int error = 0, attrflag, eof; + +#ifndef DIAGNOSTIC + if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || + (uiop->uio_resid & (DIRBLKSIZ - 1))) + panic("nfs readdirplusrpc bad uio"); +#endif + + /* + * If there is no cookie, assume directory was stale. + */ + ncl_dircookie_lock(dnp); + cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0); + if (cookiep) { + cookie = *cookiep; + ncl_dircookie_unlock(dnp); + } else { + ncl_dircookie_unlock(dnp); + return (NFSERR_BAD_COOKIE); + } + + if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) + (void)ncl_fsinfo(nmp, vp, cred, td); + error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva, + &attrflag, &eof, NULL); + if (attrflag) + (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); + + if (!error) { + /* + * We are now either at end of the directory or have filled the + * the block. + */ + if (eof) + dnp->n_direofoffset = uiop->uio_offset; + else { + if (uiop->uio_resid > 0) + ncl_printf("EEK! readdirplusrpc resid > 0\n"); + ncl_dircookie_lock(dnp); + cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1); + *cookiep = cookie; + ncl_dircookie_unlock(dnp); + } + } else if (NFS_ISV4(vp)) { + error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); + } + return (error); +} + +/* + * Silly rename. To make the NFS filesystem that is stateless look a little + * more like the "ufs" a remove of an active vnode is translated to a rename + * to a funny looking filename that is removed by nfs_inactive on the + * nfsnode. There is the potential for another process on a different client + * to create the same funny name between the nfs_lookitup() fails and the + * nfs_rename() completes, but... + */ +static int +nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) +{ + struct sillyrename *sp; + struct nfsnode *np; + int error; + short pid; + unsigned int lticks; + + cache_purge(dvp); + np = VTONFS(vp); +#ifndef DIAGNOSTIC + if (vp->v_type == VDIR) + panic("nfs: sillyrename dir"); +#endif + MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), + M_NEWNFSREQ, M_WAITOK); + sp->s_cred = crhold(cnp->cn_cred); + sp->s_dvp = dvp; + VREF(dvp); + + /* + * Fudge together a funny name. + * Changing the format of the funny name to accomodate more + * sillynames per directory. + * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is + * CPU ticks since boot. + */ + pid = cnp->cn_thread->td_proc->p_pid; + lticks = (unsigned int)ticks; + for ( ; ; ) { + sp->s_namlen = sprintf(sp->s_name, + ".nfs.%08x.%04x4.4", lticks, + pid); + if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, + cnp->cn_thread, NULL)) + break; + lticks++; + } + error = nfs_renameit(dvp, vp, cnp, sp); + if (error) + goto bad; + error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, + cnp->cn_thread, &np); + np->n_sillyrename = sp; + return (0); +bad: + vrele(sp->s_dvp); + crfree(sp->s_cred); + free((caddr_t)sp, M_NEWNFSREQ); + return (error); +} + +/* + * Look up a file name and optionally either update the file handle or + * allocate an nfsnode, depending on the value of npp. + * npp == NULL --> just do the lookup + * *npp == NULL --> allocate a new nfsnode and make sure attributes are + * handled too + * *npp != NULL --> update the file handle in the vnode + */ +static int +nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred, + struct thread *td, struct nfsnode **npp) +{ + struct vnode *newvp = NULL, *vp; + struct nfsnode *np, *dnp = VTONFS(dvp); + struct nfsfh *nfhp, *onfhp; + struct nfsvattr nfsva, dnfsva; + struct componentname cn; + int error = 0, attrflag, dattrflag; + u_int hash; + + error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva, + &nfhp, &attrflag, &dattrflag, NULL); + if (dattrflag) + (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1); + if (npp && !error) { + if (*npp != NULL) { + np = *npp; + vp = NFSTOV(np); + /* + * For NFSv4, check to see if it is the same name and + * replace the name, if it is different. + */ + if (np->n_v4 != NULL && nfsva.na_type == VREG && + (np->n_v4->n4_namelen != len || + NFSBCMP(name, NFS4NODENAME(np->n_v4), len) || + dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen || + NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, + dnp->n_fhp->nfh_len))) { +#ifdef notdef +{ char nnn[100]; int nnnl; +nnnl = (len < 100) ? len : 99; +bcopy(name, nnn, nnnl); +nnn[nnnl] = '\0'; +printf("replace=%s\n",nnn); +} +#endif + FREE((caddr_t)np->n_v4, M_NFSV4NODE); + MALLOC(np->n_v4, struct nfsv4node *, + sizeof (struct nfsv4node) + + dnp->n_fhp->nfh_len + len - 1, + M_NFSV4NODE, M_WAITOK); + np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len; + np->n_v4->n4_namelen = len; + NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data, + dnp->n_fhp->nfh_len); + NFSBCOPY(name, NFS4NODENAME(np->n_v4), len); + } + hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, + FNV1_32_INIT); + onfhp = np->n_fhp; + /* + * Rehash node for new file handle. + */ + vfs_hash_rehash(vp, hash); + np->n_fhp = nfhp; + if (onfhp != NULL) + FREE((caddr_t)onfhp, M_NFSFH); + newvp = NFSTOV(np); + } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) { + FREE((caddr_t)nfhp, M_NFSFH); + VREF(dvp); + newvp = dvp; + } else { + cn.cn_nameptr = name; + cn.cn_namelen = len; + error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td, + &np, NULL); + if (error) + return (error); + newvp = NFSTOV(np); + } + if (!attrflag && *npp == NULL) { + vrele(newvp); + return (ENOENT); + } + if (attrflag) + (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL, + 0, 1); + } + if (npp && *npp == NULL) { + if (error) { + if (newvp) { + if (newvp == dvp) + vrele(newvp); + else + vput(newvp); + } + } else + *npp = np; + } + if (error && NFS_ISV4(dvp)) + error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); + return (error); +} + +/* + * Nfs Version 3 and 4 commit rpc + */ +int +ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred, + struct thread *td) +{ + struct nfsvattr nfsva; + struct nfsmount *nmp = VFSTONFS(vp->v_mount); + int error, attrflag; + u_char verf[NFSX_VERF]; + + mtx_lock(&nmp->nm_mtx); + if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) { + mtx_unlock(&nmp->nm_mtx); + return (0); + } + mtx_unlock(&nmp->nm_mtx); + error = nfsrpc_commit(vp, offset, cnt, cred, td, verf, &nfsva, + &attrflag, NULL); + if (!error) { + if (NFSBCMP((caddr_t)nmp->nm_verf, verf, NFSX_VERF)) { + NFSBCOPY(verf, (caddr_t)nmp->nm_verf, NFSX_VERF); + error = NFSERR_STALEWRITEVERF; + } + if (!error && attrflag) + (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, + 0, 1); + } else if (NFS_ISV4(vp)) { + error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); + } + return (error); +} + +/* + * Strategy routine. + * For async requests when nfsiod(s) are running, queue the request by + * calling ncl_asyncio(), otherwise just all ncl_doio() to do the + * request. + */ +static int +nfs_strategy(struct vop_strategy_args *ap) +{ + struct buf *bp = ap->a_bp; + struct ucred *cr; + + KASSERT(!(bp->b_flags & B_DONE), + ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp)); + BUF_ASSERT_HELD(bp); + + if (bp->b_iocmd == BIO_READ) + cr = bp->b_rcred; + else + cr = bp->b_wcred; + + /* + * If the op is asynchronous and an i/o daemon is waiting + * queue the request, wake it up and wait for completion + * otherwise just do it ourselves. + */ + if ((bp->b_flags & B_ASYNC) == 0 || + ncl_asyncio(VFSTONFS(ap->a_vp->v_mount), bp, NOCRED, curthread)) + (void)ncl_doio(ap->a_vp, bp, cr, curthread); + return (0); +} + +/* + * fsync vnode op. Just call ncl_flush() with commit == 1. + */ +/* ARGSUSED */ +static int +nfs_fsync(struct vop_fsync_args *ap) +{ + return (ncl_flush(ap->a_vp, ap->a_waitfor, NULL, ap->a_td, 1)); +} + +/* + * Flush all the blocks associated with a vnode. + * Walk through the buffer pool and push any dirty pages + * associated with the vnode. + */ +int +ncl_flush(struct vnode *vp, int waitfor, struct ucred *cred, struct thread *td, + int commit) +{ + struct nfsnode *np = VTONFS(vp); + struct buf *bp; + int i; + struct buf *nbp; + struct nfsmount *nmp = VFSTONFS(vp->v_mount); + int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos; + int passone = 1, trycnt = 0; + u_quad_t off, endoff, toff; + struct ucred* wcred = NULL; + struct buf **bvec = NULL; + struct bufobj *bo; +#ifndef NFS_COMMITBVECSIZ +#define NFS_COMMITBVECSIZ 20 +#endif + struct buf *bvec_on_stack[NFS_COMMITBVECSIZ]; + int bvecsize = 0, bveccount; + + if (nmp->nm_flag & NFSMNT_INT) + slpflag = PCATCH; + if (!commit) + passone = 0; + bo = &vp->v_bufobj; + /* + * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the + * server, but has not been committed to stable storage on the server + * yet. On the first pass, the byte range is worked out and the commit + * rpc is done. On the second pass, ncl_writebp() is called to do the + * job. + */ +again: + off = (u_quad_t)-1; + endoff = 0; + bvecpos = 0; + if (NFS_ISV34(vp) && commit) { + if (bvec != NULL && bvec != bvec_on_stack) + free(bvec, M_TEMP); + /* + * Count up how many buffers waiting for a commit. + */ + bveccount = 0; + BO_LOCK(bo); + TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { + if (!BUF_ISLOCKED(bp) && + (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) + == (B_DELWRI | B_NEEDCOMMIT)) + bveccount++; + } + /* + * Allocate space to remember the list of bufs to commit. It is + * important to use M_NOWAIT here to avoid a race with nfs_write. + * If we can't get memory (for whatever reason), we will end up + * committing the buffers one-by-one in the loop below. + */ + if (bveccount > NFS_COMMITBVECSIZ) { + /* + * Release the vnode interlock to avoid a lock + * order reversal. + */ + BO_UNLOCK(bo); + bvec = (struct buf **) + malloc(bveccount * sizeof(struct buf *), + M_TEMP, M_NOWAIT); + BO_LOCK(bo); + if (bvec == NULL) { + bvec = bvec_on_stack; + bvecsize = NFS_COMMITBVECSIZ; + } else + bvecsize = bveccount; + } else { + bvec = bvec_on_stack; + bvecsize = NFS_COMMITBVECSIZ; + } + TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { + if (bvecpos >= bvecsize) + break; + if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { + nbp = TAILQ_NEXT(bp, b_bobufs); + continue; + } + if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != + (B_DELWRI | B_NEEDCOMMIT)) { + BUF_UNLOCK(bp); + nbp = TAILQ_NEXT(bp, b_bobufs); + continue; + } + BO_UNLOCK(bo); + bremfree(bp); + /* + * Work out if all buffers are using the same cred + * so we can deal with them all with one commit. + * + * NOTE: we are not clearing B_DONE here, so we have + * to do it later on in this routine if we intend to + * initiate I/O on the bp. + * + * Note: to avoid loopback deadlocks, we do not + * assign b_runningbufspace. + */ + if (wcred == NULL) + wcred = bp->b_wcred; + else if (wcred != bp->b_wcred) + wcred = NOCRED; + vfs_busy_pages(bp, 1); + + BO_LOCK(bo); + /* + * bp is protected by being locked, but nbp is not + * and vfs_busy_pages() may sleep. We have to + * recalculate nbp. + */ + nbp = TAILQ_NEXT(bp, b_bobufs); + + /* + * A list of these buffers is kept so that the + * second loop knows which buffers have actually + * been committed. This is necessary, since there + * may be a race between the commit rpc and new + * uncommitted writes on the file. + */ + bvec[bvecpos++] = bp; + toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + + bp->b_dirtyoff; + if (toff < off) + off = toff; + toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff); + if (toff > endoff) + endoff = toff; + } + BO_UNLOCK(bo); + } + if (bvecpos > 0) { + /* + * Commit data on the server, as required. + * If all bufs are using the same wcred, then use that with + * one call for all of them, otherwise commit each one + * separately. + */ + if (wcred != NOCRED) + retv = ncl_commit(vp, off, (int)(endoff - off), + wcred, td); + else { + retv = 0; + for (i = 0; i < bvecpos; i++) { + off_t off, size; + bp = bvec[i]; + off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + + bp->b_dirtyoff; + size = (u_quad_t)(bp->b_dirtyend + - bp->b_dirtyoff); + retv = ncl_commit(vp, off, (int)size, + bp->b_wcred, td); + if (retv) break; + } + } + + if (retv == NFSERR_STALEWRITEVERF) + ncl_clearcommit(vp->v_mount); + + /* + * Now, either mark the blocks I/O done or mark the + * blocks dirty, depending on whether the commit + * succeeded. + */ + for (i = 0; i < bvecpos; i++) { + bp = bvec[i]; + bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); + if (retv) { + /* + * Error, leave B_DELWRI intact + */ + vfs_unbusy_pages(bp); + brelse(bp); + } else { + /* + * Success, remove B_DELWRI ( bundirty() ). + * + * b_dirtyoff/b_dirtyend seem to be NFS + * specific. We should probably move that + * into bundirty(). XXX + */ + bufobj_wref(bo); + bp->b_flags |= B_ASYNC; + bundirty(bp); + bp->b_flags &= ~B_DONE; + bp->b_ioflags &= ~BIO_ERROR; + bp->b_dirtyoff = bp->b_dirtyend = 0; + bufdone(bp); + } + } + } + + /* + * Start/do any write(s) that are required. + */ +loop: + BO_LOCK(bo); + TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { + if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { + if (waitfor != MNT_WAIT || passone) + continue; + + error = BUF_TIMELOCK(bp, + LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, + BO_MTX(bo), "nfsfsync", slpflag, slptimeo); + if (error == 0) { + BUF_UNLOCK(bp); + goto loop; + } + if (error == ENOLCK) { + error = 0; + goto loop; + } + if (newnfs_sigintr(nmp, td)) { + error = EINTR; + goto done; + } + if (slpflag == PCATCH) { + slpflag = 0; + slptimeo = 2 * hz; + } + goto loop; + } + if ((bp->b_flags & B_DELWRI) == 0) + panic("nfs_fsync: not dirty"); + if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) { + BUF_UNLOCK(bp); + continue; + } + BO_UNLOCK(bo); + bremfree(bp); + if (passone || !commit) + bp->b_flags |= B_ASYNC; + else + bp->b_flags |= B_ASYNC; + bwrite(bp); + if (newnfs_sigintr(nmp, td)) { + error = EINTR; + goto done; + } + goto loop; + } + if (passone) { + passone = 0; + BO_UNLOCK(bo); + goto again; + } + if (waitfor == MNT_WAIT) { + while (bo->bo_numoutput) { + error = bufobj_wwait(bo, slpflag, slptimeo); + if (error) { + BO_UNLOCK(bo); + error = newnfs_sigintr(nmp, td); + if (error) + goto done; + if (slpflag == PCATCH) { + slpflag = 0; + slptimeo = 2 * hz; + } + BO_LOCK(bo); + } + } + if (bo->bo_dirty.bv_cnt != 0 && commit) { + BO_UNLOCK(bo); + goto loop; + } + /* + * Wait for all the async IO requests to drain + */ + BO_UNLOCK(bo); + mtx_lock(&np->n_mtx); + while (np->n_directio_asyncwr > 0) { + np->n_flag |= NFSYNCWAIT; + error = ncl_msleep(td, (caddr_t)&np->n_directio_asyncwr, + &np->n_mtx, slpflag | (PRIBIO + 1), + "nfsfsync", 0); + if (error) { + if (newnfs_sigintr(nmp, td)) { + mtx_unlock(&np->n_mtx); + error = EINTR; + goto done; + } + } + } + mtx_unlock(&np->n_mtx); + } else + BO_UNLOCK(bo); + mtx_lock(&np->n_mtx); + if (np->n_flag & NWRITEERR) { + error = np->n_error; + np->n_flag &= ~NWRITEERR; + } + if (commit && bo->bo_dirty.bv_cnt == 0 && + bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0) + np->n_flag &= ~NMODIFIED; + mtx_unlock(&np->n_mtx); +done: + if (bvec != NULL && bvec != bvec_on_stack) + free(bvec, M_TEMP); + if (error == 0 && commit != 0 && waitfor == MNT_WAIT && + (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 || + np->n_directio_asyncwr != 0) && trycnt++ < 5) { + /* try, try again... */ + passone = 1; + wcred = NULL; + bvec = NULL; + bvecsize = 0; +printf("try%d\n", trycnt); + goto again; + } + return (error); +} + +/* + * NFS advisory byte-level locks. + */ +static int +nfs_advlock(struct vop_advlock_args *ap) +{ + struct vnode *vp = ap->a_vp; + struct ucred *cred; + struct nfsnode *np = VTONFS(ap->a_vp); + struct proc *p = (struct proc *)ap->a_id; + struct thread *td = curthread; /* XXX */ + struct vattr va; + int ret, error = EOPNOTSUPP, vlret; + u_quad_t size; + + if (NFS_ISV4(vp) && (ap->a_flags & F_POSIX)) { + cred = p->p_ucred; + vlret = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); + if (vlret) + return (vlret); + + /* + * If this is unlocking a write locked region, flush and + * commit them before unlocking. This is required by + * RFC3530 Sec. 9.3.2. + */ + if (ap->a_op == F_UNLCK && + nfscl_checkwritelocked(vp, ap->a_fl, cred, td)) + (void) ncl_flush(vp, MNT_WAIT, cred, td, 1); + + /* + * Loop around doing the lock op, while a blocking lock + * must wait for the lock op to succeed. + */ + do { + ret = nfsrpc_advlock(vp, np->n_size, ap->a_op, + ap->a_fl, 0, cred, td); + if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) && + ap->a_op == F_SETLK) { + VOP_UNLOCK(vp, 0); + error = nfs_catnap(PZERO | PCATCH, "ncladvl"); + if (error) + return (EINTR); + vlret = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); + if (vlret) + return (vlret); + } + } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) && + ap->a_op == F_SETLK); + if (ret == NFSERR_DENIED) { + VOP_UNLOCK(vp, 0); + return (EAGAIN); + } else if (ret == EINVAL || ret == EBADF || ret == EINTR) { + VOP_UNLOCK(vp, 0); + return (ret); + } else if (ret != 0) { + VOP_UNLOCK(vp, 0); + return (EACCES); + } + + /* + * Now, if we just got a lock, invalidate data in the buffer + * cache, as required, so that the coherency conforms with + * RFC3530 Sec. 9.3.2. + */ + if (ap->a_op == F_SETLK) { + if ((np->n_flag & NMODIFIED) == 0) { + np->n_attrstamp = 0; + ret = VOP_GETATTR(vp, &va, cred); + } + if ((np->n_flag & NMODIFIED) || ret || + np->n_change != va.va_filerev) { + (void) ncl_vinvalbuf(vp, V_SAVE, td, 1); + np->n_attrstamp = 0; + ret = VOP_GETATTR(vp, &va, cred); + if (!ret) { + np->n_mtime = va.va_mtime; + np->n_change = va.va_filerev; + } + } + } + VOP_UNLOCK(vp, 0); + return (0); + } else if (!NFS_ISV4(vp)) { + error = vn_lock(vp, LK_SHARED); + if (error) + return (error); + if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) { + size = VTONFS(vp)->n_size; + VOP_UNLOCK(vp, 0); + error = lf_advlock(ap, &(vp->v_lockf), size); + } else { + if (ncl_advlock_p) + error = ncl_advlock_p(ap); + else + error = ENOLCK; + } + } + return (error); +} + +/* + * NFS advisory byte-level locks. + */ +static int +nfs_advlockasync(struct vop_advlockasync_args *ap) +{ + struct vnode *vp = ap->a_vp; + u_quad_t size; + int error; + + if (NFS_ISV4(vp)) + return (EOPNOTSUPP); + error = vn_lock(vp, LK_SHARED); + if (error) + return (error); + if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) { + size = VTONFS(vp)->n_size; + VOP_UNLOCK(vp, 0); + error = lf_advlockasync(ap, &(vp->v_lockf), size); + } else { + VOP_UNLOCK(vp, 0); + error = EOPNOTSUPP; + } + return (error); +} + +/* + * Print out the contents of an nfsnode. + */ +static int +nfs_print(struct vop_print_args *ap) +{ + struct vnode *vp = ap->a_vp; + struct nfsnode *np = VTONFS(vp); + + ncl_printf("\tfileid %ld fsid 0x%x", + np->n_vattr.na_fileid, np->n_vattr.na_fsid); + if (vp->v_type == VFIFO) + fifo_printinfo(vp); + printf("\n"); + return (0); +} + +/* + * This is the "real" nfs::bwrite(struct buf*). + * We set B_CACHE if this is a VMIO buffer. + */ +int +ncl_writebp(struct buf *bp, int force __unused, struct thread *td) +{ + int s; + int oldflags = bp->b_flags; +#if 0 + int retv = 1; + off_t off; +#endif + + BUF_ASSERT_HELD(bp); + + if (bp->b_flags & B_INVAL) { + brelse(bp); + return(0); + } + + bp->b_flags |= B_CACHE; + + /* + * Undirty the bp. We will redirty it later if the I/O fails. + */ + + s = splbio(); + bundirty(bp); + bp->b_flags &= ~B_DONE; + bp->b_ioflags &= ~BIO_ERROR; + bp->b_iocmd = BIO_WRITE; + + bufobj_wref(bp->b_bufobj); + curthread->td_ru.ru_oublock++; + splx(s); + + /* + * Note: to avoid loopback deadlocks, we do not + * assign b_runningbufspace. + */ + vfs_busy_pages(bp, 1); + + BUF_KERNPROC(bp); + bp->b_iooffset = dbtob(bp->b_blkno); + bstrategy(bp); + + if( (oldflags & B_ASYNC) == 0) { + int rtval = bufwait(bp); + + if (oldflags & B_DELWRI) { + s = splbio(); + reassignbuf(bp); + splx(s); + } + brelse(bp); + return (rtval); + } + + return (0); +} + +/* + * nfs special file access vnode op. + * Essentially just get vattr and then imitate iaccess() since the device is + * local to the client. + */ +static int +nfsspec_access(struct vop_access_args *ap) +{ + struct vattr *vap; + struct ucred *cred = ap->a_cred; + struct vnode *vp = ap->a_vp; + accmode_t accmode = ap->a_accmode; + struct vattr vattr; + int error; + + /* + * Disallow write attempts on filesystems mounted read-only; + * unless the file is a socket, fifo, or a block or character + * device resident on the filesystem. + */ + if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { + switch (vp->v_type) { + case VREG: + case VDIR: + case VLNK: + return (EROFS); + default: + break; + } + } + vap = &vattr; + error = VOP_GETATTR(vp, vap, cred); + if (error) + goto out; + error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid, + accmode, cred, NULL); +out: + return error; +} + +/* + * Read wrapper for fifos. + */ +static int +nfsfifo_read(struct vop_read_args *ap) +{ + struct nfsnode *np = VTONFS(ap->a_vp); + int error; + + /* + * Set access flag. + */ + mtx_lock(&np->n_mtx); + np->n_flag |= NACC; + getnanotime(&np->n_atim); + mtx_unlock(&np->n_mtx); + error = fifo_specops.vop_read(ap); + return error; +} + +/* + * Write wrapper for fifos. + */ +static int +nfsfifo_write(struct vop_write_args *ap) +{ + struct nfsnode *np = VTONFS(ap->a_vp); + + /* + * Set update flag. + */ + mtx_lock(&np->n_mtx); + np->n_flag |= NUPD; + getnanotime(&np->n_mtim); + mtx_unlock(&np->n_mtx); + return(fifo_specops.vop_write(ap)); +} + +/* + * Close wrapper for fifos. + * + * Update the times on the nfsnode then do fifo close. + */ +static int +nfsfifo_close(struct vop_close_args *ap) +{ + struct vnode *vp = ap->a_vp; + struct nfsnode *np = VTONFS(vp); + struct vattr vattr; + struct timespec ts; + + mtx_lock(&np->n_mtx); + if (np->n_flag & (NACC | NUPD)) { + getnanotime(&ts); + if (np->n_flag & NACC) + np->n_atim = ts; + if (np->n_flag & NUPD) + np->n_mtim = ts; + np->n_flag |= NCHG; + if (vrefcnt(vp) == 1 && + (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { + VATTR_NULL(&vattr); + if (np->n_flag & NACC) + vattr.va_atime = np->n_atim; + if (np->n_flag & NUPD) + vattr.va_mtime = np->n_mtim; + mtx_unlock(&np->n_mtx); + (void)VOP_SETATTR(vp, &vattr, ap->a_cred); + goto out; + } + } + mtx_unlock(&np->n_mtx); +out: + return (fifo_specops.vop_close(ap)); +} + +/* + * Just call ncl_writebp() with the force argument set to 1. + * + * NOTE: B_DONE may or may not be set in a_bp on call. + */ +static int +nfs_bwrite(struct buf *bp) +{ + + return (ncl_writebp(bp, 1, curthread)); +} + +struct buf_ops buf_ops_newnfs = { + .bop_name = "buf_ops_nfs", + .bop_write = nfs_bwrite, + .bop_strategy = bufstrategy, + .bop_sync = bufsync, + .bop_bdflush = bufbdflush, +}; + +/* + * Cloned from vop_stdlock(), and then the ugly hack added. + */ +static int +nfs_lock1(struct vop_lock1_args *ap) +{ + struct vnode *vp = ap->a_vp; + int error = 0; + + /* + * Since vfs_hash_get() calls vget() and it will no longer work + * for FreeBSD8 with flags == 0, I can only think of this horrible + * hack to work around it. I call vfs_hash_get() with LK_EXCLOTHER + * and then handle it here. All I want for this case is a v_usecount + * on the vnode to use for recovery, while another thread might + * hold a lock on the vnode. I have the other threads blocked, so + * there isn't any race problem. + */ + if ((ap->a_flags & LK_TYPE_MASK) == LK_EXCLOTHER) { + if ((ap->a_flags & LK_INTERLOCK) == 0) + panic("ncllock1"); + if ((vp->v_iflag & VI_DOOMED)) + error = ENOENT; + VI_UNLOCK(vp); + return (error); + } + return (_lockmgr_args(vp->v_vnlock, ap->a_flags, VI_MTX(vp), + LK_WMESG_DEFAULT, LK_PRIO_DEFAULT, LK_TIMO_DEFAULT, ap->a_file, + ap->a_line)); +} + +#ifdef NFS4_ACL_EXTATTR_NAME +static int +nfs_getacl(struct vop_getacl_args *ap) +{ + int error; + + if (ap->a_type != ACL_TYPE_NFS4) + return (EOPNOTSUPP); + error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp, + NULL); + if (error > NFSERR_STALE) { + (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0); + error = EPERM; + } + return (error); +} + +static int +nfs_setacl(struct vop_setacl_args *ap) +{ + int error; + + if (ap->a_type != ACL_TYPE_NFS4) + return (EOPNOTSUPP); + error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp, + NULL); + if (error > NFSERR_STALE) { + (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0); + error = EPERM; + } + return (error); +} + +#endif /* NFS4_ACL_EXTATTR_NAME */ |
