diff options
Diffstat (limited to 'sys/nfsclient/nfs_vnops.c')
| -rw-r--r-- | sys/nfsclient/nfs_vnops.c | 3544 |
1 files changed, 0 insertions, 3544 deletions
diff --git a/sys/nfsclient/nfs_vnops.c b/sys/nfsclient/nfs_vnops.c deleted file mode 100644 index 2516d7d..0000000 --- a/sys/nfsclient/nfs_vnops.c +++ /dev/null @@ -1,3544 +0,0 @@ -/*- - * 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. - * - * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95 - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -/* - * vnode op calls for Sun NFS version 2 and 3 - */ - -#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/jail.h> -#include <sys/lock.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/rwlock.h> -#include <sys/stat.h> -#include <sys/sysctl.h> -#include <sys/signalvar.h> - -#include <vm/vm.h> -#include <vm/vm_extern.h> -#include <vm/vm_object.h> - -#include <nfs/nfsproto.h> -#include <nfsclient/nfs.h> -#include <nfsclient/nfsnode.h> -#include <nfsclient/nfsmount.h> -#include <nfs/nfs_kdtrace.h> -#include <nfs/nfs_lock.h> -#include <nfs/xdr_subs.h> -#include <nfsclient/nfsm_subs.h> - -#include <net/if.h> -#include <net/if_var.h> -#include <net/vnet.h> -#include <netinet/in.h> -#include <netinet/in_var.h> - -#include <machine/stdarg.h> - -#ifdef KDTRACE_HOOKS -#include <sys/dtrace_bsd.h> - -dtrace_nfsclient_accesscache_flush_probe_func_t - dtrace_nfsclient_accesscache_flush_done_probe; -uint32_t nfsclient_accesscache_flush_done_id; - -dtrace_nfsclient_accesscache_get_probe_func_t - dtrace_nfsclient_accesscache_get_hit_probe, - dtrace_nfsclient_accesscache_get_miss_probe; -uint32_t nfsclient_accesscache_get_hit_id; -uint32_t nfsclient_accesscache_get_miss_id; - -dtrace_nfsclient_accesscache_load_probe_func_t - dtrace_nfsclient_accesscache_load_done_probe; -uint32_t nfsclient_accesscache_load_done_id; -#endif /* !KDTRACE_HOOKS */ - -/* Defs */ -#define TRUE 1 -#define FALSE 0 - -/* - * 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_flush(struct vnode *, int, int); -static int nfs_setattrrpc(struct vnode *, struct vattr *, struct ucred *); -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 int nfs_lookitup(struct vnode *, const 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; - -/* - * Global vfs data structures for nfs - */ -struct vop_vector nfs_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 = nfs_getpages, - .vop_putpages = nfs_putpages, - .vop_inactive = nfs_inactive, - .vop_link = nfs_link, - .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 = nfs_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 = nfs_write, -}; - -struct vop_vector nfs_fifoops = { - .vop_default = &fifo_specops, - .vop_access = nfsspec_access, - .vop_close = nfsfifo_close, - .vop_fsync = nfs_fsync, - .vop_getattr = nfs_getattr, - .vop_inactive = nfs_inactive, - .vop_print = nfs_print, - .vop_read = nfsfifo_read, - .vop_reclaim = nfs_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, const char *name, int namelen, - struct ucred *cred, struct thread *td); -static int nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, - int fnamelen, struct vnode *tdvp, - const char *tnameptr, int tnamelen, - struct ucred *cred, struct thread *td); -static int nfs_renameit(struct vnode *sdvp, struct componentname *scnp, - struct sillyrename *sp); - -/* - * Global variables - */ -struct mtx nfs_iod_mtx; -enum nfsiod_state nfs_iodwant[NFS_MAXASYNCDAEMON]; -struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; -int nfs_numasync = 0; -#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) - -SYSCTL_DECL(_vfs_oldnfs); - -static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO; -SYSCTL_INT(_vfs_oldnfs, 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_oldnfs, OID_AUTO, prime_access_cache, CTLFLAG_RW, - &nfs_prime_access_cache, 0, - "Prime NFS ACCESS cache when fetching attributes"); - -static int nfsv3_commit_on_close = 0; -SYSCTL_INT(_vfs_oldnfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW, - &nfsv3_commit_on_close, 0, "write+commit on close, else only write"); - -static int nfs_clean_pages_on_close = 1; -SYSCTL_INT(_vfs_oldnfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW, - &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close"); - -int nfs_directio_enable = 0; -SYSCTL_INT(_vfs_oldnfs, OID_AUTO, nfs_directio_enable, CTLFLAG_RW, - &nfs_directio_enable, 0, "Enable NFS directio"); - -/* - * 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 nfs_directio_allow_mmap = 1; -SYSCTL_INT(_vfs_oldnfs, OID_AUTO, nfs_directio_allow_mmap, CTLFLAG_RW, - &nfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens"); - -#if 0 -SYSCTL_INT(_vfs_oldnfs, OID_AUTO, access_cache_hits, CTLFLAG_RD, - &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count"); - -SYSCTL_INT(_vfs_oldnfs, OID_AUTO, access_cache_misses, CTLFLAG_RD, - &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count"); -#endif - -#define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \ - | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \ - | NFSV3ACCESS_DELETE | NFSV3ACCESS_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 - * nfs_iod_mtx : 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 -nfs3_access_otw(struct vnode *vp, int wmode, struct thread *td, - struct ucred *cred, uint32_t *retmode) -{ - const int v3 = 1; - u_int32_t *tl; - int error = 0, attrflag, i, lrupos; - - struct mbuf *mreq, *mrep, *md, *mb; - caddr_t bpos, dpos; - u_int32_t rmode; - struct nfsnode *np = VTONFS(vp); - - nfsstats.rpccnt[NFSPROC_ACCESS]++; - mreq = m_get2(NFSX_FH(v3) + NFSX_UNSIGNED, M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(vp, v3); - tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED); - *tl = txdr_unsigned(wmode); - nfsm_request(vp, NFSPROC_ACCESS, td, cred); - nfsm_postop_attr(vp, attrflag); - if (!error) { - lrupos = 0; - tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED); - rmode = fxdr_unsigned(u_int32_t, *tl); - 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; - KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, rmode, 0); - } - m_freem(mrep); -nfsmout: -#ifdef KDTRACE_HOOKS - if (error) { - KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, 0, - error); - } -#endif - 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, rmode, wmode; - int v3 = NFS_ISV3(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) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { - switch (vp->v_type) { - case VREG: - case VDIR: - case VLNK: - return (EROFS); - default: - break; - } - } - /* - * For nfs v3, 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 (v3) { - if (ap->a_accmode & VREAD) - mode = NFSV3ACCESS_READ; - else - mode = 0; - if (vp->v_type != VDIR) { - if (ap->a_accmode & VWRITE) - mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); - if (ap->a_accmode & VEXEC) - mode |= NFSV3ACCESS_EXECUTE; - } else { - if (ap->a_accmode & VWRITE) - mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | - NFSV3ACCESS_DELETE); - if (ap->a_accmode & VEXEC) - mode |= NFSV3ACCESS_LOOKUP; - } - /* XXX safety belt, only make blanket request if caching */ - if (nfsaccess_cache_timeout > 0) { - wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY | - NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE | - NFSV3ACCESS_DELETE | NFSV3ACCESS_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) { - nfsstats.accesscache_hits++; - gotahit = 1; - } - break; - } - } - mtx_unlock(&np->n_mtx); -#ifdef KDTRACE_HOOKS - if (gotahit) - KDTRACE_NFS_ACCESSCACHE_GET_HIT(vp, - ap->a_cred->cr_uid, mode); - else - KDTRACE_NFS_ACCESSCACHE_GET_MISS(vp, - ap->a_cred->cr_uid, mode); -#endif - if (gotahit == 0) { - /* - * Either a no, or a don't know. Go to the wire. - */ - nfsstats.accesscache_misses++; - error = nfs3_access_otw(vp, wmode, ap->a_td, ap->a_cred, - &rmode); - if (!error) { - if ((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 = nfs_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 = nfs_readdirrpc(vp, &auio, ap->a_cred); - free(bp, M_TEMP); - } else if (vp->v_type == VLNK) - error = nfs_readlinkrpc(vp, &auio, ap->a_cred); - else - error = EACCES; - } else - mtx_unlock(&np->n_mtx); - return (error); - } -} - -int nfs_otw_getattr_avoid = 0; - -/* - * 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; - struct ucred *cred; - - if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) - return (EOPNOTSUPP); - - /* - * Get a valid lease. If cached data is stale, flush it. - */ - mtx_lock(&np->n_mtx); - if (np->n_flag & NMODIFIED) { - mtx_unlock(&np->n_mtx); - error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1); - if (error == EINTR || error == EIO) - return (error); - mtx_lock(&np->n_mtx); - np->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); - if (vp->v_type == VDIR) - np->n_direofoffset = 0; - mtx_unlock(&np->n_mtx); - error = VOP_GETATTR(vp, &vattr, ap->a_cred); - if (error) - return (error); - mtx_lock(&np->n_mtx); - np->n_mtime = vattr.va_mtime; - } else { - mtx_unlock(&np->n_mtx); - error = VOP_GETATTR(vp, &vattr, ap->a_cred); - if (error) - return (error); - mtx_lock(&np->n_mtx); - if (NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) { - if (vp->v_type == VDIR) - np->n_direofoffset = 0; - mtx_unlock(&np->n_mtx); - error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1); - if (error == EINTR || error == EIO) { - return (error); - } - mtx_lock(&np->n_mtx); - np->n_mtime = vattr.va_mtime; - } - } - /* - * If the object has >= 1 O_DIRECT active opens, we disable caching. - */ - if (nfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) { - if (np->n_directio_opens == 0) { - mtx_unlock(&np->n_mtx); - error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1); - if (error) - return (error); - mtx_lock(&np->n_mtx); - np->n_flag |= NNONCACHE; - } - np->n_directio_opens++; - } - - /* - * If this is an open for writing, capture a reference to the - * credentials, so they can be used by nfs_putpages(). Using - * these write credentials is preferable to the credentials of - * whatever thread happens to be doing the VOP_PUTPAGES() since - * the write RPCs are less likely to fail with EACCES. - */ - if ((fmode & FWRITE) != 0) { - cred = np->n_writecred; - np->n_writecred = crhold(ap->a_cred); - } else - cred = NULL; - mtx_unlock(&np->n_mtx); - if (cred != NULL) - crfree(cred); - 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 nfs_flush() to - * a 1 would force a commit operation, if it is felt a - * commit is necessary now. - */ -/* ARGSUSED */ -static int -nfs_close(struct vop_close_args *ap) -{ - struct vnode *vp = ap->a_vp; - struct nfsnode *np = VTONFS(vp); - int error = 0; - int fmode = ap->a_fflag; - - 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_WLOCK(vp->v_object); - vm_object_page_clean(vp->v_object, 0, 0, 0); - VM_OBJECT_WUNLOCK(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. - */ - int cm = nfsv3_commit_on_close ? 1 : 0; - error = nfs_flush(vp, MNT_WAIT, cm); - /* np->n_flag &= ~NMODIFIED; */ - } else - error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1); - mtx_lock(&np->n_mtx); - } - if (np->n_flag & NWRITEERR) { - np->n_flag &= ~NWRITEERR; - error = np->n_error; - } - mtx_unlock(&np->n_mtx); - } - if (nfs_directio_enable) - KASSERT((np->n_directio_asyncwr == 0), - ("nfs_close: dirty unflushed (%d) directio buffers\n", - np->n_directio_asyncwr)); - if (nfs_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); - } - return (error); -} - -/* - * nfs getattr call from vfs. - */ -static int -nfs_getattr(struct vop_getattr_args *ap) -{ - struct vnode *vp = ap->a_vp; - struct nfsnode *np = VTONFS(vp); - struct thread *td = curthread; - struct vattr *vap = ap->a_vap; - struct vattr vattr; - caddr_t bpos, dpos; - int error = 0; - struct mbuf *mreq, *mrep, *md, *mb; - int v3 = NFS_ISV3(vp); - - /* - * 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 (nfs_getattrcache(vp, &vattr) == 0) - goto nfsmout; - if (v3 && nfs_prime_access_cache && nfsaccess_cache_timeout > 0) { - nfsstats.accesscache_misses++; - nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, ap->a_cred, NULL); - if (nfs_getattrcache(vp, &vattr) == 0) - goto nfsmout; - } - nfsstats.rpccnt[NFSPROC_GETATTR]++; - mreq = m_get2(NFSX_FH(v3), M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(vp, v3); - nfsm_request(vp, NFSPROC_GETATTR, td, ap->a_cred); - if (!error) { - nfsm_loadattr(vp, &vattr); - } - m_freem(mrep); -nfsmout: - 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; - - 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 vattr *vap = ap->a_vap; - struct thread *td = curthread; - int error = 0; - u_quad_t tsize; - -#ifndef nolint - tsize = (u_quad_t)0; -#endif - - /* - * Setting of flags is 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)) { - error = EROFS; - goto out; - } - 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 = nfs_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 = nfs_vinvalbuf(vp, 0, td, 1); - else - error = nfs_vinvalbuf(vp, V_SAVE, td, 1); - if (error) { - vnode_pager_setsize(vp, tsize); - goto out; - } - } else - mtx_unlock(&np->n_mtx); - /* - * np->n_size has already been set to vap->va_size - * in nfs_meta_setsize(). We must set it again since - * nfs_loadattrcache() could be called through - * nfs_meta_setsize() and could modify np->n_size. - */ - mtx_lock(&np->n_mtx); - np->n_vattr.va_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 = nfs_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); - if (error && vap->va_size != VNOVAL) { - mtx_lock(&np->n_mtx); - np->n_size = np->n_vattr.va_size = tsize; - vnode_pager_setsize(vp, tsize); - mtx_unlock(&np->n_mtx); - } -out: - return (error); -} - -/* - * Do an nfs setattr rpc. - */ -static int -nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred) -{ - struct nfsv2_sattr *sp; - struct nfsnode *np = VTONFS(vp); - caddr_t bpos, dpos; - u_int32_t *tl; - int error = 0, i, wccflag = NFSV3_WCCRATTR; - struct mbuf *mreq, *mrep, *md, *mb; - int v3 = NFS_ISV3(vp); - - nfsstats.rpccnt[NFSPROC_SETATTR]++; - mreq = m_get2(NFSX_FH(v3) + NFSX_SATTR(v3), M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(vp, v3); - if (v3) { - nfsm_v3attrbuild(vap, TRUE); - tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED); - *tl = nfs_false; - } else { - sp = nfsm_build(struct nfsv2_sattr *, NFSX_V2SATTR); - if (vap->va_mode == (mode_t)VNOVAL) - sp->sa_mode = nfs_xdrneg1; - else - sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); - if (vap->va_uid == (uid_t)VNOVAL) - sp->sa_uid = nfs_xdrneg1; - else - sp->sa_uid = txdr_unsigned(vap->va_uid); - if (vap->va_gid == (gid_t)VNOVAL) - sp->sa_gid = nfs_xdrneg1; - else - sp->sa_gid = txdr_unsigned(vap->va_gid); - sp->sa_size = txdr_unsigned(vap->va_size); - txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); - txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); - } - nfsm_request(vp, NFSPROC_SETATTR, curthread, cred); - if (v3) { - mtx_lock(&np->n_mtx); - for (i = 0; i < NFS_ACCESSCACHESIZE; i++) - np->n_accesscache[i].stamp = 0; - mtx_unlock(&np->n_mtx); - KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp); - nfsm_wcc_data(vp, wccflag); - } else - nfsm_loadattr(vp, NULL); - m_freem(mrep); -nfsmout: - 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; - struct mount *mp = dvp->v_mount; - struct vattr dvattr, vattr; - struct timespec nctime; - int flags = cnp->cn_flags; - struct vnode *newvp; - struct nfsmount *nmp; - caddr_t bpos, dpos; - struct mbuf *mreq, *mrep, *md, *mb; - long len; - nfsfh_t *fhp; - struct nfsnode *np, *newnp; - int error = 0, attrflag, dattrflag, fhsize, ltype, ncticks; - int v3 = NFS_ISV3(dvp); - struct thread *td = cnp->cn_thread; - - *vpp = NULLVP; - if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) && - (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) - return (EROFS); - if (dvp->v_type != VDIR) - return (ENOTDIR); - nmp = VFSTONFS(mp); - np = VTONFS(dvp); - if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) { - *vpp = NULLVP; - return (error); - } - error = cache_lookup(dvp, vpp, cnp, &nctime, &ncticks); - if (error > 0 && error != ENOENT) - return (error); - if (error == -1) { - /* - * Lookups of "." are special and always return the - * current directory. cache_lookup() already handles - * associated locking bookkeeping, etc. - */ - if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { - /* XXX: Is this really correct? */ - if (cnp->cn_nameiop != LOOKUP && - (flags & ISLASTCN)) - cnp->cn_flags |= SAVENAME; - return (0); - } - - /* - * We only accept a positive hit in the cache if the - * change time of the file matches our cached copy. - * Otherwise, we discard the cache entry and fallback - * to doing a lookup RPC. We also only trust cache - * entries for less than nm_nametimeo seconds. - * - * To better handle stale file handles and attributes, - * clear the attribute cache of this node if it is a - * leaf component, part of an open() call, and not - * locally modified before fetching the attributes. - * This should allow stale file handles to be detected - * here where we can fall back to a LOOKUP RPC to - * recover rather than having nfs_open() detect the - * stale file handle and failing open(2) with ESTALE. - */ - newvp = *vpp; - newnp = VTONFS(newvp); - if (!(nmp->nm_flag & NFSMNT_NOCTO) && - (flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) && - !(newnp->n_flag & NMODIFIED)) { - mtx_lock(&newnp->n_mtx); - newnp->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp); - mtx_unlock(&newnp->n_mtx); - } - if ((u_int)(ticks - ncticks) < (nmp->nm_nametimeo * hz) && - VOP_GETATTR(newvp, &vattr, cnp->cn_cred) == 0 && - timespeccmp(&vattr.va_ctime, &nctime, ==)) { - nfsstats.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; - } else if (error == ENOENT) { - if (dvp->v_iflag & VI_DOOMED) - return (ENOENT); - /* - * We only accept a negative hit in the cache if the - * modification time of the parent directory matches - * the cached copy in the name cache entry. - * Otherwise, we discard all of the negative cache - * entries for this directory. We also only trust - * negative cache entries for up to nm_negnametimeo - * seconds. - */ - if ((u_int)(ticks - ncticks) < (nmp->nm_negnametimeo * hz) && - VOP_GETATTR(dvp, &vattr, cnp->cn_cred) == 0 && - timespeccmp(&vattr.va_mtime, &nctime, ==)) { - nfsstats.lookupcache_hits++; - return (ENOENT); - } - cache_purge_negative(dvp); - } - - attrflag = dattrflag = 0; - error = 0; - newvp = NULLVP; - nfsstats.lookupcache_misses++; - nfsstats.rpccnt[NFSPROC_LOOKUP]++; - len = cnp->cn_namelen; - mreq = m_get2(NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len), M_WAITOK, - MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(dvp, v3); - nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); - nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_thread, cnp->cn_cred); - if (error) { - if (v3) { - nfsm_postop_attr_va(dvp, dattrflag, &vattr); - m_freem(mrep); - } - goto nfsmout; - } - nfsm_getfh(fhp, fhsize, v3); - - /* - * Handle RENAME case... - */ - if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) { - if (NFS_CMPFH(np, fhp, fhsize)) { - m_freem(mrep); - return (EISDIR); - } - error = nfs_nget(mp, fhp, fhsize, &np, LK_EXCLUSIVE); - if (error) { - m_freem(mrep); - return (error); - } - newvp = NFSTOV(np); - if (v3) { - nfsm_postop_attr(newvp, attrflag); - nfsm_postop_attr(dvp, attrflag); - } else - nfsm_loadattr(newvp, NULL); - *vpp = newvp; - m_freem(mrep); - cnp->cn_flags |= SAVENAME; - return (0); - } - - if (flags & ISDOTDOT) { - ltype = VOP_ISLOCKED(dvp); - error = vfs_busy(mp, MBF_NOWAIT); - if (error != 0) { - vfs_ref(mp); - VOP_UNLOCK(dvp, 0); - error = vfs_busy(mp, 0); - vn_lock(dvp, ltype | LK_RETRY); - vfs_rel(mp); - if (error == 0 && (dvp->v_iflag & VI_DOOMED)) { - vfs_unbusy(mp); - error = ENOENT; - } - if (error != 0) { - m_freem(mrep); - return (error); - } - } - VOP_UNLOCK(dvp, 0); - error = nfs_nget(mp, fhp, fhsize, &np, cnp->cn_lkflags); - if (error == 0) - newvp = NFSTOV(np); - vfs_unbusy(mp); - if (newvp != dvp) - vn_lock(dvp, ltype | LK_RETRY); - if (dvp->v_iflag & VI_DOOMED) { - if (error == 0) { - if (newvp == dvp) - vrele(newvp); - else - vput(newvp); - } - error = ENOENT; - } - if (error) { - m_freem(mrep); - return (error); - } - } else if (NFS_CMPFH(np, fhp, fhsize)) { - VREF(dvp); - newvp = dvp; - } else { - error = nfs_nget(mp, fhp, fhsize, &np, cnp->cn_lkflags); - if (error) { - m_freem(mrep); - return (error); - } - newvp = NFSTOV(np); - - /* - * Flush the attribute cache when opening a leaf node - * to ensure that fresh attributes are fetched in - * nfs_open() if we are unable to fetch attributes - * from the LOOKUP reply. - */ - if ((flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) && - !(np->n_flag & NMODIFIED)) { - mtx_lock(&np->n_mtx); - np->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp); - mtx_unlock(&np->n_mtx); - } - } - if (v3) { - nfsm_postop_attr_va(newvp, attrflag, &vattr); - nfsm_postop_attr_va(dvp, dattrflag, &dvattr); - } else { - nfsm_loadattr(newvp, &vattr); - attrflag = 1; - } - if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) - cnp->cn_flags |= SAVENAME; - if ((cnp->cn_flags & MAKEENTRY) && - (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN)) && - attrflag != 0 && (newvp->v_type != VDIR || dattrflag != 0)) - cache_enter_time(dvp, newvp, cnp, &vattr.va_ctime, - newvp->v_type != VDIR ? NULL : &dvattr.va_ctime); - *vpp = newvp; - m_freem(mrep); -nfsmout: - if (error) { - if (newvp != NULLVP) { - vput(newvp); - *vpp = NULLVP; - } - - if (error != ENOENT) - goto done; - - /* The requested file was not found. */ - if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && - (flags & ISLASTCN)) { - /* - * XXX: UFS does a full VOP_ACCESS(dvp, - * VWRITE) here instead of just checking - * MNT_RDONLY. - */ - if (mp->mnt_flag & MNT_RDONLY) - return (EROFS); - cnp->cn_flags |= SAVENAME; - return (EJUSTRETURN); - } - - if ((cnp->cn_flags & MAKEENTRY) != 0 && dattrflag) { - /* - * Cache the modification time of the parent - * directory from the post-op attributes in - * the name cache entry. The negative cache - * entry will be ignored once the directory - * has changed. Don't bother adding the entry - * if the directory has already changed. - */ - mtx_lock(&np->n_mtx); - if (timespeccmp(&np->n_vattr.va_mtime, - &vattr.va_mtime, ==)) { - mtx_unlock(&np->n_mtx); - cache_enter_time(dvp, NULL, cnp, - &vattr.va_mtime, NULL); - } else - mtx_unlock(&np->n_mtx); - } - return (ENOENT); - } -done: - return (error); -} - -/* - * nfs read call. - * Just call nfs_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 (nfs_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 (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred)); -} - -/* - * Do a readlink rpc. - * Called by nfs_doio() from below the buffer cache. - */ -int -nfs_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) -{ - caddr_t bpos, dpos; - int error = 0, len, attrflag; - struct mbuf *mreq, *mrep, *md, *mb; - int v3 = NFS_ISV3(vp); - - nfsstats.rpccnt[NFSPROC_READLINK]++; - mreq = m_get2(NFSX_FH(v3), M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(vp, v3); - nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, cred); - if (v3) - nfsm_postop_attr(vp, attrflag); - if (!error) { - nfsm_strsiz(len, NFS_MAXPATHLEN); - if (len == NFS_MAXPATHLEN) { - struct nfsnode *np = VTONFS(vp); - mtx_lock(&np->n_mtx); - if (np->n_size && np->n_size < NFS_MAXPATHLEN) - len = np->n_size; - mtx_unlock(&np->n_mtx); - } - nfsm_mtouio(uiop, len); - } - m_freem(mrep); -nfsmout: - return (error); -} - -/* - * nfs read rpc call - * Ditto above - */ -int -nfs_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) -{ - u_int32_t *tl; - caddr_t bpos, dpos; - struct mbuf *mreq, *mrep, *md, *mb; - struct nfsmount *nmp; - off_t end; - int error = 0, len, retlen, tsiz, eof, attrflag; - int v3 = NFS_ISV3(vp); - int rsize; - -#ifndef nolint - eof = 0; -#endif - nmp = VFSTONFS(vp->v_mount); - tsiz = uiop->uio_resid; - mtx_lock(&nmp->nm_mtx); - end = uiop->uio_offset + tsiz; - if (end > nmp->nm_maxfilesize || end < uiop->uio_offset) { - mtx_unlock(&nmp->nm_mtx); - return (EFBIG); - } - rsize = nmp->nm_rsize; - mtx_unlock(&nmp->nm_mtx); - while (tsiz > 0) { - nfsstats.rpccnt[NFSPROC_READ]++; - len = (tsiz > rsize) ? rsize : tsiz; - mreq = m_get2(NFSX_FH(v3) + NFSX_UNSIGNED * 3, M_WAITOK, - MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(vp, v3); - tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED * 3); - if (v3) { - txdr_hyper(uiop->uio_offset, tl); - *(tl + 2) = txdr_unsigned(len); - } else { - *tl++ = txdr_unsigned(uiop->uio_offset); - *tl++ = txdr_unsigned(len); - *tl = 0; - } - nfsm_request(vp, NFSPROC_READ, uiop->uio_td, cred); - if (v3) { - nfsm_postop_attr(vp, attrflag); - if (error) { - m_freem(mrep); - goto nfsmout; - } - tl = nfsm_dissect(u_int32_t *, 2 * NFSX_UNSIGNED); - eof = fxdr_unsigned(int, *(tl + 1)); - } else { - nfsm_loadattr(vp, NULL); - } - nfsm_strsiz(retlen, rsize); - nfsm_mtouio(uiop, retlen); - m_freem(mrep); - tsiz -= retlen; - if (v3) { - if (eof || retlen == 0) { - tsiz = 0; - } - } else if (retlen < len) { - tsiz = 0; - } - } -nfsmout: - return (error); -} - -/* - * nfs write call - */ -int -nfs_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred, - int *iomode, int *must_commit) -{ - u_int32_t *tl; - int32_t backup; - caddr_t bpos, dpos; - struct mbuf *mreq, *mrep, *md, *mb; - struct nfsmount *nmp = VFSTONFS(vp->v_mount); - off_t end; - int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; - int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC; - int wsize; - - KASSERT(uiop->uio_iovcnt == 1, ("nfs: writerpc iovcnt > 1")); - *must_commit = 0; - tsiz = uiop->uio_resid; - mtx_lock(&nmp->nm_mtx); - end = uiop->uio_offset + tsiz; - if (end > nmp->nm_maxfilesize || end < uiop->uio_offset) { - mtx_unlock(&nmp->nm_mtx); - return (EFBIG); - } - wsize = nmp->nm_wsize; - mtx_unlock(&nmp->nm_mtx); - while (tsiz > 0) { - nfsstats.rpccnt[NFSPROC_WRITE]++; - len = (tsiz > wsize) ? wsize : tsiz; - mreq = m_get2(NFSX_FH(v3) + 5 * NFSX_UNSIGNED, M_WAITOK, - MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(vp, v3); - if (v3) { - tl = nfsm_build(u_int32_t *, 5 * NFSX_UNSIGNED); - txdr_hyper(uiop->uio_offset, tl); - tl += 2; - *tl++ = txdr_unsigned(len); - *tl++ = txdr_unsigned(*iomode); - *tl = txdr_unsigned(len); - } else { - u_int32_t x; - - tl = nfsm_build(u_int32_t *, 4 * NFSX_UNSIGNED); - /* Set both "begin" and "current" to non-garbage. */ - x = txdr_unsigned((u_int32_t)uiop->uio_offset); - *tl++ = x; /* "begin offset" */ - *tl++ = x; /* "current offset" */ - x = txdr_unsigned(len); - *tl++ = x; /* total to this offset */ - *tl = x; /* size of this write */ - } - nfsm_uiotom(uiop, len); - nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, cred); - if (v3) { - wccflag = NFSV3_WCCCHK; - nfsm_wcc_data(vp, wccflag); - if (!error) { - tl = nfsm_dissect(u_int32_t *, 2 * NFSX_UNSIGNED - + NFSX_V3WRITEVERF); - rlen = fxdr_unsigned(int, *tl++); - if (rlen == 0) { - error = NFSERR_IO; - m_freem(mrep); - break; - } else if (rlen < len) { - backup = len - rlen; - uiop->uio_iov->iov_base = - (char *)uiop->uio_iov->iov_base - - backup; - uiop->uio_iov->iov_len += backup; - uiop->uio_offset -= backup; - uiop->uio_resid += backup; - len = rlen; - } - commit = fxdr_unsigned(int, *tl++); - - /* - * 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; - mtx_lock(&nmp->nm_mtx); - if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){ - bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, - NFSX_V3WRITEVERF); - nmp->nm_state |= NFSSTA_HASWRITEVERF; - } else if (bcmp((caddr_t)tl, - (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { - *must_commit = 1; - bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, - NFSX_V3WRITEVERF); - } - mtx_unlock(&nmp->nm_mtx); - } - } else { - nfsm_loadattr(vp, NULL); - } - if (wccflag) { - mtx_lock(&(VTONFS(vp))->n_mtx); - VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime; - mtx_unlock(&(VTONFS(vp))->n_mtx); - } - m_freem(mrep); - if (error) - break; - tsiz -= len; - } -nfsmout: - if (DOINGASYNC(vp)) - committed = NFSV3WRITE_FILESYNC; - *iomode = committed; - if (error) - uiop->uio_resid = tsiz; - 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 nfsv2_sattr *sp; - u_int32_t *tl; - struct vnode *newvp = NULL; - struct nfsnode *np = NULL; - struct vattr vattr; - caddr_t bpos, dpos; - int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; - struct mbuf *mreq, *mrep, *md, *mb; - u_int32_t rdev; - int v3 = NFS_ISV3(dvp); - - if (vap->va_type == VCHR || vap->va_type == VBLK) - rdev = txdr_unsigned(vap->va_rdev); - else if (vap->va_type == VFIFO || vap->va_type == VSOCK) - rdev = nfs_xdrneg1; - else { - return (EOPNOTSUPP); - } - if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0) - return (error); - nfsstats.rpccnt[NFSPROC_MKNOD]++; - mreq = m_get2(NFSX_FH(v3) + 4 * NFSX_UNSIGNED + - nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3), M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(dvp, v3); - nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); - if (v3) { - tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED); - *tl++ = vtonfsv3_type(vap->va_type); - nfsm_v3attrbuild(vap, FALSE); - if (vap->va_type == VCHR || vap->va_type == VBLK) { - tl = nfsm_build(u_int32_t *, 2 * NFSX_UNSIGNED); - *tl++ = txdr_unsigned(major(vap->va_rdev)); - *tl = txdr_unsigned(minor(vap->va_rdev)); - } - } else { - sp = nfsm_build(struct nfsv2_sattr *, NFSX_V2SATTR); - sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); - sp->sa_uid = nfs_xdrneg1; - sp->sa_gid = nfs_xdrneg1; - sp->sa_size = rdev; - txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); - txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); - } - nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_thread, cnp->cn_cred); - if (!error) { - nfsm_mtofh(dvp, newvp, v3, gotvp); - if (!gotvp) { - if (newvp) { - vput(newvp); - 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 (v3) - nfsm_wcc_data(dvp, wccflag); - m_freem(mrep); -nfsmout: - if (error) { - if (newvp) - vput(newvp); - } else { - *vpp = newvp; - } - mtx_lock(&(VTONFS(dvp))->n_mtx); - VTONFS(dvp)->n_flag |= NMODIFIED; - if (!wccflag) { - VTONFS(dvp)->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); - } - mtx_unlock(&(VTONFS(dvp))->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 nfsv2_sattr *sp; - u_int32_t *tl; - struct nfsnode *np = NULL; - struct vnode *newvp = NULL; - caddr_t bpos, dpos; - int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; - struct mbuf *mreq, *mrep, *md, *mb; - struct vattr vattr; - int v3 = NFS_ISV3(dvp); - - /* - * Oops, not for me.. - */ - if (vap->va_type == VSOCK) { - error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap); - return (error); - } - - if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0) { - return (error); - } - if (vap->va_vaflags & VA_EXCLUSIVE) - fmode |= O_EXCL; -again: - nfsstats.rpccnt[NFSPROC_CREATE]++; - mreq = m_get2(NFSX_FH(v3) + 2 * NFSX_UNSIGNED + - nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3), M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(dvp, v3); - nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); - if (v3) { - tl = nfsm_build(u_int32_t *, NFSX_UNSIGNED); - if (fmode & O_EXCL) { - *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); - tl = nfsm_build(u_int32_t *, NFSX_V3CREATEVERF); -#ifdef INET - CURVNET_SET(CRED_TO_VNET(cnp->cn_cred)); - IN_IFADDR_RLOCK(); - if (!TAILQ_EMPTY(&V_in_ifaddrhead)) - *tl++ = IA_SIN(TAILQ_FIRST(&V_in_ifaddrhead))->sin_addr.s_addr; - else -#endif - *tl++ = create_verf; -#ifdef INET - IN_IFADDR_RUNLOCK(); - CURVNET_RESTORE(); -#endif - *tl = ++create_verf; - } else { - *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); - nfsm_v3attrbuild(vap, FALSE); - } - } else { - sp = nfsm_build(struct nfsv2_sattr *, NFSX_V2SATTR); - sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); - sp->sa_uid = nfs_xdrneg1; - sp->sa_gid = nfs_xdrneg1; - sp->sa_size = 0; - txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); - txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); - } - nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_thread, cnp->cn_cred); - if (!error) { - nfsm_mtofh(dvp, newvp, v3, gotvp); - if (!gotvp) { - if (newvp) { - vput(newvp); - 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 (v3) - nfsm_wcc_data(dvp, wccflag); - m_freem(mrep); -nfsmout: - if (error) { - if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { - fmode &= ~O_EXCL; - goto again; - } - if (newvp) - vput(newvp); - } else if (v3 && (fmode & O_EXCL)) { - /* - * We are normally called with only a partially initialized - * VAP. Since the NFSv3 spec says that server may use the - * file attributes to store the verifier, the spec requires - * us to do a SETATTR RPC. FreeBSD servers store the verifier - * in atime, but we can't really assume that all servers will - * so we ensure that our SETATTR sets both atime and mtime. - */ - if (vap->va_mtime.tv_sec == VNOVAL) - vfs_timestamp(&vap->va_mtime); - if (vap->va_atime.tv_sec == VNOVAL) - vap->va_atime = vap->va_mtime; - error = nfs_setattrrpc(newvp, vap, cnp->cn_cred); - if (error) - vput(newvp); - } - if (!error) { - *ap->a_vpp = newvp; - } - mtx_lock(&(VTONFS(dvp))->n_mtx); - VTONFS(dvp)->n_flag |= NMODIFIED; - if (!wccflag) { - VTONFS(dvp)->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); - } - mtx_unlock(&(VTONFS(dvp))->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; - - KASSERT((cnp->cn_flags & HASBUF) != 0, ("nfs_remove: no name")); - KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount")); - if (vp->v_type == VDIR) - error = EPERM; - else if (vrefcnt(vp) == 1 || (np->n_sillyrename && - !VOP_GETATTR(vp, &vattr, cnp->cn_cred) && 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 = nfs_vinvalbuf(vp, 0, cnp->cn_thread, 1); - /* Do the rpc */ - if (error != EINTR && error != EIO) - error = nfs_removerpc(dvp, 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); - mtx_lock(&np->n_mtx); - np->n_attrstamp = 0; - mtx_unlock(&np->n_mtx); - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); - return (error); -} - -/* - * nfs file remove rpc called from nfs_inactive - */ -int -nfs_removeit(struct sillyrename *sp) -{ - /* - * 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, sp->s_name, sp->s_namlen, sp->s_cred, - NULL)); -} - -/* - * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). - */ -static int -nfs_removerpc(struct vnode *dvp, const char *name, int namelen, - struct ucred *cred, struct thread *td) -{ - caddr_t bpos, dpos; - int error = 0, wccflag = NFSV3_WCCRATTR; - struct mbuf *mreq, *mrep, *md, *mb; - int v3 = NFS_ISV3(dvp); - - nfsstats.rpccnt[NFSPROC_REMOVE]++; - mreq = m_get2(NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen), - M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(dvp, v3); - nfsm_strtom(name, namelen, NFS_MAXNAMLEN); - nfsm_request(dvp, NFSPROC_REMOVE, td, cred); - if (v3) - nfsm_wcc_data(dvp, wccflag); - m_freem(mrep); -nfsmout: - mtx_lock(&(VTONFS(dvp))->n_mtx); - VTONFS(dvp)->n_flag |= NMODIFIED; - if (!wccflag) { - VTONFS(dvp)->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); - } - mtx_unlock(&(VTONFS(dvp))->n_mtx); - 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; - int error; - - KASSERT((tcnp->cn_flags & HASBUF) != 0 && - (fcnp->cn_flags & HASBUF) != 0, ("nfs_rename: no name")); - /* 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) { - nfs_printf("nfs_rename: fvp == tvp (can't happen)\n"); - error = 0; - goto out; - } - if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) - 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, fcnp->cn_nameptr, fcnp->cn_namelen, - tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, - tcnp->cn_thread); - - 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 componentname *scnp, - struct sillyrename *sp) -{ - - return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, sdvp, - 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, const char *fnameptr, int fnamelen, - struct vnode *tdvp, const char *tnameptr, int tnamelen, struct ucred *cred, - struct thread *td) -{ - caddr_t bpos, dpos; - int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; - struct mbuf *mreq, *mrep, *md, *mb; - int v3 = NFS_ISV3(fdvp); - - nfsstats.rpccnt[NFSPROC_RENAME]++; - mreq = m_get2((NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + - nfsm_rndup(tnamelen), M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(fdvp, v3); - nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); - nfsm_fhtom(tdvp, v3); - nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); - nfsm_request(fdvp, NFSPROC_RENAME, td, cred); - if (v3) { - nfsm_wcc_data(fdvp, fwccflag); - nfsm_wcc_data(tdvp, twccflag); - } - m_freem(mrep); -nfsmout: - mtx_lock(&(VTONFS(fdvp))->n_mtx); - VTONFS(fdvp)->n_flag |= NMODIFIED; - mtx_unlock(&(VTONFS(fdvp))->n_mtx); - mtx_lock(&(VTONFS(tdvp))->n_mtx); - VTONFS(tdvp)->n_flag |= NMODIFIED; - mtx_unlock(&(VTONFS(tdvp))->n_mtx); - if (!fwccflag) { - VTONFS(fdvp)->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(fdvp); - } - if (!twccflag) { - VTONFS(tdvp)->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp); - } - 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; - caddr_t bpos, dpos; - int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; - struct mbuf *mreq, *mrep, *md, *mb; - int v3; - - 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); - - v3 = NFS_ISV3(vp); - nfsstats.rpccnt[NFSPROC_LINK]++; - mreq = m_get2(NFSX_FH(v3)*2 + NFSX_UNSIGNED + - nfsm_rndup(cnp->cn_namelen), M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(vp, v3); - nfsm_fhtom(tdvp, v3); - nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); - nfsm_request(vp, NFSPROC_LINK, cnp->cn_thread, cnp->cn_cred); - if (v3) { - nfsm_postop_attr(vp, attrflag); - nfsm_wcc_data(tdvp, wccflag); - } - m_freem(mrep); -nfsmout: - mtx_lock(&(VTONFS(tdvp))->n_mtx); - VTONFS(tdvp)->n_flag |= NMODIFIED; - mtx_unlock(&(VTONFS(tdvp))->n_mtx); - if (!attrflag) { - VTONFS(vp)->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp); - } - if (!wccflag) { - VTONFS(tdvp)->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp); - } - 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 nfsv2_sattr *sp; - caddr_t bpos, dpos; - int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; - struct mbuf *mreq, *mrep, *md, *mb; - struct vnode *newvp = NULL; - int v3 = NFS_ISV3(dvp); - - nfsstats.rpccnt[NFSPROC_SYMLINK]++; - slen = strlen(ap->a_target); - mreq = m_get2(NFSX_FH(v3) + 2*NFSX_UNSIGNED + - nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3), - M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(dvp, v3); - nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); - if (v3) { - nfsm_v3attrbuild(vap, FALSE); - } - nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); - if (!v3) { - sp = nfsm_build(struct nfsv2_sattr *, NFSX_V2SATTR); - sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); - sp->sa_uid = nfs_xdrneg1; - sp->sa_gid = nfs_xdrneg1; - sp->sa_size = nfs_xdrneg1; - txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); - txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); - } - - /* - * Issue the NFS request and get the rpc response. - * - * Only NFSv3 responses returning an error of 0 actually return - * a file handle that can be converted into newvp without having - * to do an extra lookup rpc. - */ - nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_thread, cnp->cn_cred); - if (v3) { - if (error == 0) - nfsm_mtofh(dvp, newvp, v3, gotvp); - nfsm_wcc_data(dvp, wccflag); - } - - /* - * out code jumps -> here, mrep is also freed. - */ - - m_freem(mrep); -nfsmout: - - /* - * 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. - */ - if (error == 0 && newvp == NULL) { - struct nfsnode *np = NULL; - - 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); - } else { - *ap->a_vpp = newvp; - } - mtx_lock(&(VTONFS(dvp))->n_mtx); - VTONFS(dvp)->n_flag |= NMODIFIED; - mtx_unlock(&(VTONFS(dvp))->n_mtx); - if (!wccflag) { - VTONFS(dvp)->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); - } - 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 nfsv2_sattr *sp; - int len; - struct nfsnode *np = NULL; - struct vnode *newvp = NULL; - caddr_t bpos, dpos; - int error = 0, wccflag = NFSV3_WCCRATTR; - int gotvp = 0; - struct mbuf *mreq, *mrep, *md, *mb; - struct vattr vattr; - int v3 = NFS_ISV3(dvp); - - if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0) - return (error); - len = cnp->cn_namelen; - nfsstats.rpccnt[NFSPROC_MKDIR]++; - mreq = m_get2(NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + - NFSX_SATTR(v3), M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(dvp, v3); - nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); - if (v3) { - nfsm_v3attrbuild(vap, FALSE); - } else { - sp = nfsm_build(struct nfsv2_sattr *, NFSX_V2SATTR); - sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); - sp->sa_uid = nfs_xdrneg1; - sp->sa_gid = nfs_xdrneg1; - sp->sa_size = nfs_xdrneg1; - txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); - txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); - } - nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_thread, cnp->cn_cred); - if (!error) - nfsm_mtofh(dvp, newvp, v3, gotvp); - if (v3) - nfsm_wcc_data(dvp, wccflag); - m_freem(mrep); -nfsmout: - mtx_lock(&(VTONFS(dvp))->n_mtx); - VTONFS(dvp)->n_flag |= NMODIFIED; - mtx_unlock(&(VTONFS(dvp))->n_mtx); - if (!wccflag) { - VTONFS(dvp)->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); - } - if (error == 0 && newvp == NULL) { - error = nfs_lookitup(dvp, cnp->cn_nameptr, len, 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); - } else - *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; - caddr_t bpos, dpos; - int error = 0, wccflag = NFSV3_WCCRATTR; - struct mbuf *mreq, *mrep, *md, *mb; - int v3 = NFS_ISV3(dvp); - - if (dvp == vp) - return (EINVAL); - nfsstats.rpccnt[NFSPROC_RMDIR]++; - mreq = m_get2(NFSX_FH(v3) + NFSX_UNSIGNED + - nfsm_rndup(cnp->cn_namelen), M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(dvp, v3); - nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); - nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_thread, cnp->cn_cred); - if (v3) - nfsm_wcc_data(dvp, wccflag); - m_freem(mrep); -nfsmout: - mtx_lock(&(VTONFS(dvp))->n_mtx); - VTONFS(dvp)->n_flag |= NMODIFIED; - mtx_unlock(&(VTONFS(dvp))->n_mtx); - if (!wccflag) { - VTONFS(dvp)->n_attrstamp = 0; - KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp); - } - cache_purge(dvp); - cache_purge(vp); - /* - * 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_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) { - mtx_unlock(&np->n_mtx); - nfsstats.direofcache_hits++; - goto out; - } else - mtx_unlock(&np->n_mtx); - } - } - - /* - * Call nfs_bioread() to do the real work. - */ - tresid = uio->uio_resid; - error = nfs_bioread(vp, uio, 0, ap->a_cred); - - if (!error && uio->uio_resid == tresid) { - nfsstats.direofcache_misses++; - } -out: - return (error); -} - -/* - * Readdir rpc call. - * Called from below the buffer cache by nfs_doio(). - */ -int -nfs_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) -{ - int len, left; - struct dirent *dp = NULL; - u_int32_t *tl; - caddr_t cp; - nfsuint64 *cookiep; - caddr_t bpos, dpos; - struct mbuf *mreq, *mrep, *md, *mb; - nfsuint64 cookie; - struct nfsmount *nmp = VFSTONFS(vp->v_mount); - struct nfsnode *dnp = VTONFS(vp); - u_quad_t fileno; - int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; - int attrflag; - int v3 = NFS_ISV3(vp); - - KASSERT(uiop->uio_iovcnt == 1 && - (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 && - (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0, - ("nfs readdirrpc bad uio")); - - /* - * If there is no cookie, assume directory was stale. - */ - nfs_dircookie_lock(dnp); - cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); - if (cookiep) { - cookie = *cookiep; - nfs_dircookie_unlock(dnp); - } else { - nfs_dircookie_unlock(dnp); - return (NFSERR_BAD_COOKIE); - } - - /* - * Loop around doing readdir rpc's of size nm_readdirsize - * truncated to a multiple of DIRBLKSIZ. - * The stopping criteria is EOF or buffer full. - */ - while (more_dirs && bigenough) { - nfsstats.rpccnt[NFSPROC_READDIR]++; - mreq = m_get2(NFSX_FH(v3) + NFSX_READDIR(v3), M_WAITOK, - MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(vp, v3); - if (v3) { - tl = nfsm_build(u_int32_t *, 5 * NFSX_UNSIGNED); - *tl++ = cookie.nfsuquad[0]; - *tl++ = cookie.nfsuquad[1]; - mtx_lock(&dnp->n_mtx); - *tl++ = dnp->n_cookieverf.nfsuquad[0]; - *tl++ = dnp->n_cookieverf.nfsuquad[1]; - mtx_unlock(&dnp->n_mtx); - } else { - tl = nfsm_build(u_int32_t *, 2 * NFSX_UNSIGNED); - *tl++ = cookie.nfsuquad[0]; - } - *tl = txdr_unsigned(nmp->nm_readdirsize); - nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, cred); - if (v3) { - nfsm_postop_attr(vp, attrflag); - if (!error) { - tl = nfsm_dissect(u_int32_t *, - 2 * NFSX_UNSIGNED); - mtx_lock(&dnp->n_mtx); - dnp->n_cookieverf.nfsuquad[0] = *tl++; - dnp->n_cookieverf.nfsuquad[1] = *tl; - mtx_unlock(&dnp->n_mtx); - } else { - m_freem(mrep); - goto nfsmout; - } - } - tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED); - more_dirs = fxdr_unsigned(int, *tl); - - /* loop thru the dir entries, doctoring them to 4bsd form */ - while (more_dirs && bigenough) { - if (v3) { - tl = nfsm_dissect(u_int32_t *, - 3 * NFSX_UNSIGNED); - fileno = fxdr_hyper(tl); - len = fxdr_unsigned(int, *(tl + 2)); - } else { - tl = nfsm_dissect(u_int32_t *, - 2 * NFSX_UNSIGNED); - fileno = fxdr_unsigned(u_quad_t, *tl++); - len = fxdr_unsigned(int, *tl); - } - if (len <= 0 || len > NFS_MAXNAMLEN) { - error = EBADRPC; - m_freem(mrep); - goto nfsmout; - } - tlen = nfsm_rndup(len); - if (tlen == len) - tlen += 4; /* To ensure null termination */ - left = DIRBLKSIZ - blksiz; - if ((tlen + DIRHDSIZ) > left) { - dp->d_reclen += left; - uiop->uio_iov->iov_base = - (char *)uiop->uio_iov->iov_base + left; - uiop->uio_iov->iov_len -= left; - uiop->uio_offset += left; - uiop->uio_resid -= left; - blksiz = 0; - } - if ((tlen + DIRHDSIZ) > uiop->uio_resid) - bigenough = 0; - if (bigenough) { - dp = (struct dirent *)uiop->uio_iov->iov_base; - dp->d_fileno = (int)fileno; - dp->d_namlen = len; - dp->d_reclen = tlen + DIRHDSIZ; - dp->d_type = DT_UNKNOWN; - blksiz += dp->d_reclen; - if (blksiz == DIRBLKSIZ) - blksiz = 0; - uiop->uio_offset += DIRHDSIZ; - uiop->uio_resid -= DIRHDSIZ; - uiop->uio_iov->iov_base = - (char *)uiop->uio_iov->iov_base + DIRHDSIZ; - uiop->uio_iov->iov_len -= DIRHDSIZ; - nfsm_mtouio(uiop, len); - cp = uiop->uio_iov->iov_base; - tlen -= len; - *cp = '\0'; /* null terminate */ - uiop->uio_iov->iov_base = - (char *)uiop->uio_iov->iov_base + tlen; - uiop->uio_iov->iov_len -= tlen; - uiop->uio_offset += tlen; - uiop->uio_resid -= tlen; - } else - nfsm_adv(nfsm_rndup(len)); - if (v3) { - tl = nfsm_dissect(u_int32_t *, - 3 * NFSX_UNSIGNED); - } else { - tl = nfsm_dissect(u_int32_t *, - 2 * NFSX_UNSIGNED); - } - if (bigenough) { - cookie.nfsuquad[0] = *tl++; - if (v3) - cookie.nfsuquad[1] = *tl++; - } else if (v3) - tl += 2; - else - tl++; - more_dirs = fxdr_unsigned(int, *tl); - } - /* - * If at end of rpc data, get the eof boolean - */ - if (!more_dirs) { - tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED); - more_dirs = (fxdr_unsigned(int, *tl) == 0); - } - m_freem(mrep); - } - /* - * Fill last record, iff any, out to a multiple of DIRBLKSIZ - * by increasing d_reclen for the last record. - */ - if (blksiz > 0) { - left = DIRBLKSIZ - blksiz; - dp->d_reclen += left; - uiop->uio_iov->iov_base = - (char *)uiop->uio_iov->iov_base + left; - uiop->uio_iov->iov_len -= left; - uiop->uio_offset += left; - uiop->uio_resid -= left; - } - - /* - * We are now either at the end of the directory or have filled the - * block. - */ - if (bigenough) - dnp->n_direofoffset = uiop->uio_offset; - else { - if (uiop->uio_resid > 0) - nfs_printf("EEK! readdirrpc resid > 0\n"); - nfs_dircookie_lock(dnp); - cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); - *cookiep = cookie; - nfs_dircookie_unlock(dnp); - } -nfsmout: - return (error); -} - -/* - * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). - */ -int -nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred) -{ - int len, left; - struct dirent *dp; - u_int32_t *tl; - caddr_t cp; - struct vnode *newvp; - nfsuint64 *cookiep; - caddr_t bpos, dpos, dpossav1, dpossav2; - struct mbuf *mreq, *mrep, *md, *mb, *mdsav1, *mdsav2; - struct nameidata nami, *ndp = &nami; - struct componentname *cnp = &ndp->ni_cnd; - nfsuint64 cookie; - struct nfsmount *nmp = VFSTONFS(vp->v_mount); - struct nfsnode *dnp = VTONFS(vp), *np; - struct vattr vattr, dvattr; - nfsfh_t *fhp; - u_quad_t fileno; - int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; - int attrflag, dattrflag, fhsize; - -#ifndef nolint - dp = NULL; -#endif - KASSERT(uiop->uio_iovcnt == 1 && - (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 && - (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0, - ("nfs readdirplusrpc bad uio")); - ndp->ni_dvp = vp; - newvp = NULLVP; - - /* - * If there is no cookie, assume directory was stale. - */ - nfs_dircookie_lock(dnp); - cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); - if (cookiep) { - cookie = *cookiep; - nfs_dircookie_unlock(dnp); - } else { - nfs_dircookie_unlock(dnp); - return (NFSERR_BAD_COOKIE); - } - /* - * Loop around doing readdir rpc's of size nm_readdirsize - * truncated to a multiple of DIRBLKSIZ. - * The stopping criteria is EOF or buffer full. - */ - while (more_dirs && bigenough) { - nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; - mreq = m_get2(NFSX_FH(1) + 6 * NFSX_UNSIGNED, M_WAITOK, - MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(vp, 1); - tl = nfsm_build(u_int32_t *, 6 * NFSX_UNSIGNED); - *tl++ = cookie.nfsuquad[0]; - *tl++ = cookie.nfsuquad[1]; - mtx_lock(&dnp->n_mtx); - *tl++ = dnp->n_cookieverf.nfsuquad[0]; - *tl++ = dnp->n_cookieverf.nfsuquad[1]; - mtx_unlock(&dnp->n_mtx); - *tl++ = txdr_unsigned(nmp->nm_readdirsize); - *tl = txdr_unsigned(nmp->nm_rsize); - nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, cred); - nfsm_postop_attr_va(vp, dattrflag, &dvattr); - if (error) { - m_freem(mrep); - goto nfsmout; - } - tl = nfsm_dissect(u_int32_t *, 3 * NFSX_UNSIGNED); - mtx_lock(&dnp->n_mtx); - dnp->n_cookieverf.nfsuquad[0] = *tl++; - dnp->n_cookieverf.nfsuquad[1] = *tl++; - mtx_unlock(&dnp->n_mtx); - more_dirs = fxdr_unsigned(int, *tl); - - /* loop thru the dir entries, doctoring them to 4bsd form */ - while (more_dirs && bigenough) { - tl = nfsm_dissect(u_int32_t *, 3 * NFSX_UNSIGNED); - fileno = fxdr_hyper(tl); - len = fxdr_unsigned(int, *(tl + 2)); - if (len <= 0 || len > NFS_MAXNAMLEN) { - error = EBADRPC; - m_freem(mrep); - goto nfsmout; - } - tlen = nfsm_rndup(len); - if (tlen == len) - tlen += 4; /* To ensure null termination*/ - left = DIRBLKSIZ - blksiz; - if ((tlen + DIRHDSIZ) > left) { - dp->d_reclen += left; - uiop->uio_iov->iov_base = - (char *)uiop->uio_iov->iov_base + left; - uiop->uio_iov->iov_len -= left; - uiop->uio_offset += left; - uiop->uio_resid -= left; - blksiz = 0; - } - if ((tlen + DIRHDSIZ) > uiop->uio_resid) - bigenough = 0; - if (bigenough) { - dp = (struct dirent *)uiop->uio_iov->iov_base; - dp->d_fileno = (int)fileno; - dp->d_namlen = len; - dp->d_reclen = tlen + DIRHDSIZ; - dp->d_type = DT_UNKNOWN; - blksiz += dp->d_reclen; - if (blksiz == DIRBLKSIZ) - blksiz = 0; - uiop->uio_offset += DIRHDSIZ; - uiop->uio_resid -= DIRHDSIZ; - uiop->uio_iov->iov_base = - (char *)uiop->uio_iov->iov_base + DIRHDSIZ; - uiop->uio_iov->iov_len -= DIRHDSIZ; - cnp->cn_nameptr = uiop->uio_iov->iov_base; - cnp->cn_namelen = len; - nfsm_mtouio(uiop, len); - cp = uiop->uio_iov->iov_base; - tlen -= len; - *cp = '\0'; - uiop->uio_iov->iov_base = - (char *)uiop->uio_iov->iov_base + tlen; - uiop->uio_iov->iov_len -= tlen; - uiop->uio_offset += tlen; - uiop->uio_resid -= tlen; - } else - nfsm_adv(nfsm_rndup(len)); - tl = nfsm_dissect(u_int32_t *, 3 * NFSX_UNSIGNED); - if (bigenough) { - cookie.nfsuquad[0] = *tl++; - cookie.nfsuquad[1] = *tl++; - } else - tl += 2; - - /* - * Since the attributes are before the file handle - * (sigh), we must skip over the attributes and then - * come back and get them. - */ - attrflag = fxdr_unsigned(int, *tl); - if (attrflag) { - dpossav1 = dpos; - mdsav1 = md; - nfsm_adv(NFSX_V3FATTR); - tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED); - doit = fxdr_unsigned(int, *tl); - /* - * Skip loading the attrs for "..". There's a - * race between loading the attrs here and - * lookups that look for the directory currently - * being read (in the parent). We try to acquire - * the exclusive lock on ".." here, owning the - * lock on the directory being read. Lookup will - * hold the lock on ".." and try to acquire the - * lock on the directory being read. - * - * There are other ways of fixing this, one would - * be to do a trylock on the ".." vnode and skip - * loading the attrs on ".." if it happens to be - * locked by another process. But skipping the - * attrload on ".." seems the easiest option. - */ - if (strcmp(dp->d_name, "..") == 0) { - doit = 0; - /* - * We've already skipped over the attrs, - * skip over the filehandle. And store d_type - * as VDIR. - */ - tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED); - i = fxdr_unsigned(int, *tl); - nfsm_adv(nfsm_rndup(i)); - dp->d_type = IFTODT(VTTOIF(VDIR)); - } - if (doit) { - nfsm_getfh(fhp, fhsize, 1); - if (NFS_CMPFH(dnp, fhp, fhsize)) { - VREF(vp); - newvp = vp; - np = dnp; - } else { - error = nfs_nget(vp->v_mount, fhp, - fhsize, &np, LK_EXCLUSIVE); - if (error) - doit = 0; - else - newvp = NFSTOV(np); - } - } - if (doit && bigenough) { - dpossav2 = dpos; - dpos = dpossav1; - mdsav2 = md; - md = mdsav1; - nfsm_loadattr(newvp, &vattr); - dpos = dpossav2; - md = mdsav2; - dp->d_type = IFTODT(VTTOIF(vattr.va_type)); - ndp->ni_vp = newvp; - if (newvp->v_type != VDIR || dattrflag != 0) - cache_enter_time(ndp->ni_dvp, ndp->ni_vp, - cnp, &vattr.va_ctime, - newvp->v_type != VDIR ? NULL : - &dvattr.va_ctime); - } - } else { - /* Just skip over the file handle */ - tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED); - i = fxdr_unsigned(int, *tl); - if (i) { - tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED); - fhsize = fxdr_unsigned(int, *tl); - nfsm_adv(nfsm_rndup(fhsize)); - } - } - if (newvp != NULLVP) { - if (newvp == vp) - vrele(newvp); - else - vput(newvp); - newvp = NULLVP; - } - tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED); - more_dirs = fxdr_unsigned(int, *tl); - } - /* - * If at end of rpc data, get the eof boolean - */ - if (!more_dirs) { - tl = nfsm_dissect(u_int32_t *, NFSX_UNSIGNED); - more_dirs = (fxdr_unsigned(int, *tl) == 0); - } - m_freem(mrep); - } - /* - * Fill last record, iff any, out to a multiple of DIRBLKSIZ - * by increasing d_reclen for the last record. - */ - if (blksiz > 0) { - left = DIRBLKSIZ - blksiz; - dp->d_reclen += left; - uiop->uio_iov->iov_base = - (char *)uiop->uio_iov->iov_base + left; - uiop->uio_iov->iov_len -= left; - uiop->uio_offset += left; - uiop->uio_resid -= left; - } - - /* - * We are now either at the end of the directory or have filled the - * block. - */ - if (bigenough) - dnp->n_direofoffset = uiop->uio_offset; - else { - if (uiop->uio_resid > 0) - nfs_printf("EEK! readdirplusrpc resid > 0\n"); - nfs_dircookie_lock(dnp); - cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); - *cookiep = cookie; - nfs_dircookie_unlock(dnp); - } -nfsmout: - if (newvp != NULLVP) { - if (newvp == vp) - vrele(newvp); - else - vput(newvp); - newvp = NULLVP; - } - 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); - KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir")); - sp = malloc(sizeof (struct sillyrename), - M_NFSREQ, M_WAITOK); - sp->s_cred = crhold(cnp->cn_cred); - sp->s_dvp = dvp; - sp->s_removeit = nfs_removeit; - 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, 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_NFSREQ); - 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, const char *name, int len, struct ucred *cred, - struct thread *td, struct nfsnode **npp) -{ - struct vnode *newvp = NULL; - struct nfsnode *np, *dnp = VTONFS(dvp); - caddr_t bpos, dpos; - int error = 0, fhlen, attrflag; - struct mbuf *mreq, *mrep, *md, *mb; - nfsfh_t *nfhp; - int v3 = NFS_ISV3(dvp); - - nfsstats.rpccnt[NFSPROC_LOOKUP]++; - mreq = m_get2(NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len), - M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(dvp, v3); - nfsm_strtom(name, len, NFS_MAXNAMLEN); - nfsm_request(dvp, NFSPROC_LOOKUP, td, cred); - if (npp && !error) { - nfsm_getfh(nfhp, fhlen, v3); - if (*npp) { - np = *npp; - if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { - free((caddr_t)np->n_fhp, M_NFSBIGFH); - np->n_fhp = &np->n_fh; - } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) - np->n_fhp =(nfsfh_t *)malloc(fhlen, M_NFSBIGFH, M_WAITOK); - bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); - np->n_fhsize = fhlen; - newvp = NFSTOV(np); - } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { - VREF(dvp); - newvp = dvp; - } else { - error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np, LK_EXCLUSIVE); - if (error) { - m_freem(mrep); - return (error); - } - newvp = NFSTOV(np); - } - if (v3) { - nfsm_postop_attr(newvp, attrflag); - if (!attrflag && *npp == NULL) { - m_freem(mrep); - if (newvp == dvp) - vrele(newvp); - else - vput(newvp); - return (ENOENT); - } - } else - nfsm_loadattr(newvp, NULL); - } - m_freem(mrep); -nfsmout: - if (npp && *npp == NULL) { - if (error) { - if (newvp) { - if (newvp == dvp) - vrele(newvp); - else - vput(newvp); - } - } else - *npp = np; - } - return (error); -} - -/* - * Nfs Version 3 commit rpc - */ -int -nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred, - struct thread *td) -{ - u_int32_t *tl; - struct nfsmount *nmp = VFSTONFS(vp->v_mount); - caddr_t bpos, dpos; - int error = 0, wccflag = NFSV3_WCCRATTR; - struct mbuf *mreq, *mrep, *md, *mb; - - mtx_lock(&nmp->nm_mtx); - if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) { - mtx_unlock(&nmp->nm_mtx); - return (0); - } - mtx_unlock(&nmp->nm_mtx); - nfsstats.rpccnt[NFSPROC_COMMIT]++; - mreq = m_get2(NFSX_FH(1), M_WAITOK, MT_DATA, 0); - mb = mreq; - bpos = mtod(mb, caddr_t); - nfsm_fhtom(vp, 1); - tl = nfsm_build(u_int32_t *, 3 * NFSX_UNSIGNED); - txdr_hyper(offset, tl); - tl += 2; - *tl = txdr_unsigned(cnt); - nfsm_request(vp, NFSPROC_COMMIT, td, cred); - nfsm_wcc_data(vp, wccflag); - if (!error) { - tl = nfsm_dissect(u_int32_t *, NFSX_V3WRITEVERF); - if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, - NFSX_V3WRITEVERF)) { - bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, - NFSX_V3WRITEVERF); - error = NFSERR_STALEWRITEVERF; - } - } - m_freem(mrep); -nfsmout: - return (error); -} - -/* - * Strategy routine. - * For async requests when nfsiod(s) are running, queue the request by - * calling nfs_asyncio(), otherwise just all nfs_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 || - nfs_asyncio(VFSTONFS(ap->a_vp->v_mount), bp, NOCRED, curthread)) - (void)nfs_doio(ap->a_vp, bp, cr, curthread); - return (0); -} - -/* - * fsync vnode op. Just call nfs_flush() with commit == 1. - */ -/* ARGSUSED */ -static int -nfs_fsync(struct vop_fsync_args *ap) -{ - - return (nfs_flush(ap->a_vp, ap->a_waitfor, 1)); -} - -/* - * Flush all the blocks associated with a vnode. - * Walk through the buffer pool and push any dirty pages - * associated with the vnode. - */ -static int -nfs_flush(struct vnode *vp, int waitfor, 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; - u_quad_t off, endoff, toff; - struct ucred* wcred = NULL; - struct buf **bvec = NULL; - struct bufobj *bo; - struct thread *td = curthread; -#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, nfs_writebp() is called to do the - * job. - */ -again: - off = (u_quad_t)-1; - endoff = 0; - bvecpos = 0; - if (NFS_ISV3(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 = nfs_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 = nfs_commit(vp, off, (int)size, - bp->b_wcred, td); - if (retv) break; - } - } - - if (retv == NFSERR_STALEWRITEVERF) - nfs_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_LOCKPTR(bo), "nfsfsync", slpflag, slptimeo); - if (error == 0) { - BUF_UNLOCK(bp); - goto loop; - } - if (error == ENOLCK) { - error = 0; - goto loop; - } - if (nfs_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 (nfs_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 = nfs_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 = nfs_msleep(td, (caddr_t)&np->n_directio_asyncwr, - &np->n_mtx, slpflag | (PRIBIO + 1), - "nfsfsync", 0); - if (error) { - if (nfs_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); - return (error); -} - -/* - * NFS advisory byte-level locks. - */ -static int -nfs_advlock(struct vop_advlock_args *ap) -{ - struct vnode *vp = ap->a_vp; - u_quad_t size; - int error; - - 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 (nfs_advlock_p) - error = nfs_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; - - 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); - - nfs_printf("\tfileid %ld fsid 0x%x", - np->n_vattr.va_fileid, np->n_vattr.va_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 -nfs_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; - vfs_timestamp(&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; - vfs_timestamp(&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)) { - vfs_timestamp(&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 nfs_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 (nfs_writebp(bp, 1, curthread)); -} - -struct buf_ops buf_ops_nfs = { - .bop_name = "buf_ops_nfs", - .bop_write = nfs_bwrite, - .bop_strategy = bufstrategy, - .bop_sync = bufsync, - .bop_bdflush = bufbdflush, -}; |
