/*- * Copyright (c) 2002, 2003 Networks Associates Technology, Inc. * All rights reserved. * * This software was developed for the FreeBSD Project by Marshall * Kirk McKusick and Network Associates Laboratories, the Security * Research Division of Network Associates, Inc. under DARPA/SPAWAR * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS * research program * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. * * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: @(#)ufs_readwrite.c 8.11 (Berkeley) 5/8/95 * from: $FreeBSD: .../ufs/ufs_readwrite.c,v 1.96 2002/08/12 09:22:11 phk ... * @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95 */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "opt_directio.h" #include "opt_ffs.h" #ifdef DIRECTIO extern int ffs_rawread(struct vnode *vp, struct uio *uio, int *workdone); #endif static vop_fsync_t ffs_fsync; static vop_lock1_t ffs_lock; static vop_getpages_t ffs_getpages; static vop_read_t ffs_read; static vop_write_t ffs_write; static int ffs_extread(struct vnode *vp, struct uio *uio, int ioflag); static int ffs_extwrite(struct vnode *vp, struct uio *uio, int ioflag, struct ucred *cred); static vop_strategy_t ffsext_strategy; static vop_closeextattr_t ffs_closeextattr; static vop_deleteextattr_t ffs_deleteextattr; static vop_getextattr_t ffs_getextattr; static vop_listextattr_t ffs_listextattr; static vop_openextattr_t ffs_openextattr; static vop_setextattr_t ffs_setextattr; static vop_vptofh_t ffs_vptofh; /* Global vfs data structures for ufs. */ struct vop_vector ffs_vnodeops1 = { .vop_default = &ufs_vnodeops, .vop_fsync = ffs_fsync, .vop_getpages = ffs_getpages, .vop_lock1 = ffs_lock, .vop_read = ffs_read, .vop_reallocblks = ffs_reallocblks, .vop_write = ffs_write, .vop_vptofh = ffs_vptofh, }; struct vop_vector ffs_fifoops1 = { .vop_default = &ufs_fifoops, .vop_fsync = ffs_fsync, .vop_reallocblks = ffs_reallocblks, /* XXX: really ??? */ .vop_vptofh = ffs_vptofh, }; /* Global vfs data structures for ufs. */ struct vop_vector ffs_vnodeops2 = { .vop_default = &ufs_vnodeops, .vop_fsync = ffs_fsync, .vop_getpages = ffs_getpages, .vop_lock1 = ffs_lock, .vop_read = ffs_read, .vop_reallocblks = ffs_reallocblks, .vop_write = ffs_write, .vop_closeextattr = ffs_closeextattr, .vop_deleteextattr = ffs_deleteextattr, .vop_getextattr = ffs_getextattr, .vop_listextattr = ffs_listextattr, .vop_openextattr = ffs_openextattr, .vop_setextattr = ffs_setextattr, .vop_vptofh = ffs_vptofh, }; struct vop_vector ffs_fifoops2 = { .vop_default = &ufs_fifoops, .vop_fsync = ffs_fsync, .vop_lock1 = ffs_lock, .vop_reallocblks = ffs_reallocblks, .vop_strategy = ffsext_strategy, .vop_closeextattr = ffs_closeextattr, .vop_deleteextattr = ffs_deleteextattr, .vop_getextattr = ffs_getextattr, .vop_listextattr = ffs_listextattr, .vop_openextattr = ffs_openextattr, .vop_setextattr = ffs_setextattr, .vop_vptofh = ffs_vptofh, }; /* * Synch an open file. */ /* ARGSUSED */ static int ffs_fsync(struct vop_fsync_args *ap) { struct vnode *vp; struct bufobj *bo; int error; vp = ap->a_vp; bo = &vp->v_bufobj; retry: error = ffs_syncvnode(vp, ap->a_waitfor, 0); if (error) return (error); if (ap->a_waitfor == MNT_WAIT && DOINGSOFTDEP(vp)) { error = softdep_fsync(vp); if (error) return (error); /* * The softdep_fsync() function may drop vp lock, * allowing for dirty buffers to reappear on the * bo_dirty list. Recheck and resync as needed. */ BO_LOCK(bo); if (vp->v_type == VREG && (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) { BO_UNLOCK(bo); goto retry; } BO_UNLOCK(bo); } return (0); } int ffs_syncvnode(struct vnode *vp, int waitfor, int flags) { struct inode *ip; struct bufobj *bo; struct buf *bp; struct buf *nbp; ufs_lbn_t lbn; int error, wait, passes; ip = VTOI(vp); ip->i_flag &= ~IN_NEEDSYNC; bo = &vp->v_bufobj; /* * When doing MNT_WAIT we must first flush all dependencies * on the inode. */ if (DOINGSOFTDEP(vp) && waitfor == MNT_WAIT && (error = softdep_sync_metadata(vp)) != 0) return (error); /* * Flush all dirty buffers associated with a vnode. */ error = 0; passes = 0; wait = 0; /* Always do an async pass first. */ lbn = lblkno(ip->i_fs, (ip->i_size + ip->i_fs->fs_bsize - 1)); BO_LOCK(bo); loop: TAILQ_FOREACH(bp, &bo->bo_dirty.bv_hd, b_bobufs) bp->b_vflags &= ~BV_SCANNED; TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { /* * Reasons to skip this buffer: it has already been considered * on this pass, the buffer has dependencies that will cause * it to be redirtied and it has not already been deferred, * or it is already being written. */ if ((bp->b_vflags & BV_SCANNED) != 0) continue; bp->b_vflags |= BV_SCANNED; /* Flush indirects in order. */ if (waitfor == MNT_WAIT && bp->b_lblkno <= -NDADDR && lbn_level(bp->b_lblkno) >= passes) continue; if (bp->b_lblkno > lbn) panic("ffs_syncvnode: syncing truncated data."); if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL) == 0) { BO_UNLOCK(bo); } else if (wait != 0) { if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, BO_LOCKPTR(bo)) != 0) { bp->b_vflags &= ~BV_SCANNED; goto next; } } else continue; if ((bp->b_flags & B_DELWRI) == 0) panic("ffs_fsync: not dirty"); /* * Check for dependencies and potentially complete them. */ if (!LIST_EMPTY(&bp->b_dep) && (error = softdep_sync_buf(vp, bp, wait ? MNT_WAIT : MNT_NOWAIT)) != 0) { /* I/O error. */ if (error != EBUSY) { BUF_UNLOCK(bp); return (error); } /* If we deferred once, don't defer again. */ if ((bp->b_flags & B_DEFERRED) == 0) { bp->b_flags |= B_DEFERRED; BUF_UNLOCK(bp); goto next; } } if (wait) { bremfree(bp); if ((error = bwrite(bp)) != 0) return (error); } else if ((bp->b_flags & B_CLUSTEROK)) { (void) vfs_bio_awrite(bp); } else { bremfree(bp); (void) bawrite(bp); } next: /* * Since we may have slept during the I/O, we need * to start from a known point. */ BO_LOCK(bo); nbp = TAILQ_FIRST(&bo->bo_dirty.bv_hd); } if (waitfor != MNT_WAIT) { BO_UNLOCK(bo); if ((flags & NO_INO_UPDT) != 0) return (0); else return (ffs_update(vp, 0)); } /* Drain IO to see if we're done. */ bufobj_wwait(bo, 0, 0); /* * Block devices associated with filesystems may have new I/O * requests posted for them even if the vnode is locked, so no * amount of trying will get them clean. We make several passes * as a best effort. * * Regular files may need multiple passes to flush all dependency * work as it is possible that we must write once per indirect * level, once for the leaf, and once for the inode and each of * these will be done with one sync and one async pass. */ if (bo->bo_dirty.bv_cnt > 0) { /* Write the inode after sync passes to flush deps. */ if (wait && DOINGSOFTDEP(vp) && (flags & NO_INO_UPDT) == 0) { BO_UNLOCK(bo); ffs_update(vp, 1); BO_LOCK(bo); } /* switch between sync/async. */ wait = !wait; if (wait == 1 || ++passes < NIADDR + 2) goto loop; #ifdef INVARIANTS if (!vn_isdisk(vp, NULL)) vprint("ffs_fsync: dirty", vp); #endif } BO_UNLOCK(bo); error = 0; if ((flags & NO_INO_UPDT) == 0) error = ffs_update(vp, 1); if (DOINGSUJ(vp)) softdep_journal_fsync(VTOI(vp)); return (error); } static int ffs_lock(ap) struct vop_lock1_args /* { struct vnode *a_vp; int a_flags; struct thread *a_td; char *file; int line; } */ *ap; { #ifndef NO_FFS_SNAPSHOT struct vnode *vp; int flags; struct lock *lkp; int result; switch (ap->a_flags & LK_TYPE_MASK) { case LK_SHARED: case LK_UPGRADE: case LK_EXCLUSIVE: vp = ap->a_vp; flags = ap->a_flags; for (;;) { #ifdef DEBUG_VFS_LOCKS KASSERT(vp->v_holdcnt != 0, ("ffs_lock %p: zero hold count", vp)); #endif lkp = vp->v_vnlock; result = _lockmgr_args(lkp, flags, VI_MTX(vp), LK_WMESG_DEFAULT, LK_PRIO_DEFAULT, LK_TIMO_DEFAULT, ap->a_file, ap->a_line); if (lkp == vp->v_vnlock || result != 0) break; /* * Apparent success, except that the vnode * mutated between snapshot file vnode and * regular file vnode while this process * slept. The lock currently held is not the * right lock. Release it, and try to get the * new lock. */ (void) _lockmgr_args(lkp, LK_RELEASE, NULL, LK_WMESG_DEFAULT, LK_PRIO_DEFAULT, LK_TIMO_DEFAULT, ap->a_file, ap->a_line); if ((flags & (LK_INTERLOCK | LK_NOWAIT)) == (LK_INTERLOCK | LK_NOWAIT)) return (EBUSY); if ((flags & LK_TYPE_MASK) == LK_UPGRADE) flags = (flags & ~LK_TYPE_MASK) | LK_EXCLUSIVE; flags &= ~LK_INTERLOCK; } break; default: result = VOP_LOCK1_APV(&ufs_vnodeops, ap); } return (result); #else return (VOP_LOCK1_APV(&ufs_vnodeops, ap)); #endif } /* * Vnode op for reading. */ static int ffs_read(ap) struct vop_read_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; } */ *ap; { struct vnode *vp; struct inode *ip; struct uio *uio; struct fs *fs; struct buf *bp; ufs_lbn_t lbn, nextlbn; off_t bytesinfile; long size, xfersize, blkoffset; ssize_t orig_resid; int error; int seqcount; int ioflag; vp = ap->a_vp; uio = ap->a_uio; ioflag = ap->a_ioflag; if (ap->a_ioflag & IO_EXT) #ifdef notyet return (ffs_extread(vp, uio, ioflag)); #else panic("ffs_read+IO_EXT"); #endif #ifdef DIRECTIO if ((ioflag & IO_DIRECT) != 0) { int workdone; error = ffs_rawread(vp, uio, &workdone); if (error != 0 || workdone != 0) return error; } #endif seqcount = ap->a_ioflag >> IO_SEQSHIFT; ip = VTOI(vp); #ifdef INVARIANTS if (uio->uio_rw != UIO_READ) panic("ffs_read: mode"); if (vp->v_type == VLNK) { if ((int)ip->i_size < vp->v_mount->mnt_maxsymlinklen) panic("ffs_read: short symlink"); } else if (vp->v_type != VREG && vp->v_type != VDIR) panic("ffs_read: type %d", vp->v_type); #endif orig_resid = uio->uio_resid; KASSERT(orig_resid >= 0, ("ffs_read: uio->uio_resid < 0")); if (orig_resid == 0) return (0); KASSERT(uio->uio_offset >= 0, ("ffs_read: uio->uio_offset < 0")); fs = ip->i_fs; if (uio->uio_offset < ip->i_size && uio->uio_offset >= fs->fs_maxfilesize) return (EOVERFLOW); for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) { if ((bytesinfile = ip->i_size - uio->uio_offset) <= 0) break; lbn = lblkno(fs, uio->uio_offset); nextlbn = lbn + 1; /* * size of buffer. The buffer representing the * end of the file is rounded up to the size of * the block type ( fragment or full block, * depending ). */ size = blksize(fs, ip, lbn); blkoffset = blkoff(fs, uio->uio_offset); /* * The amount we want to transfer in this iteration is * one FS block less the amount of the data before * our startpoint (duh!) */ xfersize = fs->fs_bsize - blkoffset; /* * But if we actually want less than the block, * or the file doesn't have a whole block more of data, * then use the lesser number. */ if (uio->uio_resid < xfersize) xfersize = uio->uio_resid; if (bytesinfile < xfersize) xfersize = bytesinfile; if (lblktosize(fs, nextlbn) >= ip->i_size) { /* * Don't do readahead if this is the end of the file. */ error = bread_gb(vp, lbn, size, NOCRED, GB_UNMAPPED, &bp); } else if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { /* * Otherwise if we are allowed to cluster, * grab as much as we can. * * XXX This may not be a win if we are not * doing sequential access. */ error = cluster_read(vp, ip->i_size, lbn, size, NOCRED, blkoffset + uio->uio_resid, seqcount, GB_UNMAPPED, &bp); } else if (seqcount > 1) { /* * If we are NOT allowed to cluster, then * if we appear to be acting sequentially, * fire off a request for a readahead * as well as a read. Note that the 4th and 5th * arguments point to arrays of the size specified in * the 6th argument. */ u_int nextsize = blksize(fs, ip, nextlbn); error = breadn_flags(vp, lbn, size, &nextlbn, &nextsize, 1, NOCRED, GB_UNMAPPED, &bp); } else { /* * Failing all of the above, just read what the * user asked for. Interestingly, the same as * the first option above. */ error = bread_gb(vp, lbn, size, NOCRED, GB_UNMAPPED, &bp); } if (error) { brelse(bp); bp = NULL; break; } /* * If IO_DIRECT then set B_DIRECT for the buffer. This * will cause us to attempt to release the buffer later on * and will cause the buffer cache to attempt to free the * underlying pages. */ if (ioflag & IO_DIRECT) bp->b_flags |= B_DIRECT; /* * We should only get non-zero b_resid when an I/O error * has occurred, which should cause us to break above. * However, if the short read did not cause an error, * then we want to ensure that we do not uiomove bad * or uninitialized data. */ size -= bp->b_resid; if (size < xfersize) { if (size == 0) break; xfersize = size; } if ((bp->b_flags & B_UNMAPPED) == 0) { error = vn_io_fault_uiomove((char *)bp->b_data + blkoffset, (int)xfersize, uio); } else { error = vn_io_fault_pgmove(bp->b_pages, blkoffset, (int)xfersize, uio); } if (error) break; if ((ioflag & (IO_VMIO|IO_DIRECT)) && (LIST_EMPTY(&bp->b_dep))) { /* * If there are no dependencies, and it's VMIO, * then we don't need the buf, mark it available * for freeing. For non-direct VMIO reads, the VM * has the data. */ bp->b_flags |= B_RELBUF; brelse(bp); } else { /* * Otherwise let whoever * made the request take care of * freeing it. We just queue * it onto another list. */ bqrelse(bp); } } /* * This can only happen in the case of an error * because the loop above resets bp to NULL on each iteration * and on normal completion has not set a new value into it. * so it must have come from a 'break' statement */ if (bp != NULL) { if ((ioflag & (IO_VMIO|IO_DIRECT)) && (LIST_EMPTY(&bp->b_dep))) { bp->b_flags |= B_RELBUF; brelse(bp); } else { bqrelse(bp); } } if ((error == 0 || uio->uio_resid != orig_resid) && (vp->v_mount->mnt_flag & (MNT_NOATIME | MNT_RDONLY)) == 0 && (ip->i_flag & IN_ACCESS) == 0) { VI_LOCK(vp); ip->i_flag |= IN_ACCESS; VI_UNLOCK(vp); } return (error); } /* * Vnode op for writing. */ static int ffs_write(ap) struct vop_write_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; } */ *ap; { struct vnode *vp; struct uio *uio; struct inode *ip; struct fs *fs; struct buf *bp; ufs_lbn_t lbn; off_t osize; ssize_t resid; int seqcount; int blkoffset, error, flags, ioflag, size, xfersize; vp = ap->a_vp; uio = ap->a_uio; ioflag = ap->a_ioflag; if (ap->a_ioflag & IO_EXT) #ifdef notyet return (ffs_extwrite(vp, uio, ioflag, ap->a_cred)); #else panic("ffs_write+IO_EXT"); #endif seqcount = ap->a_ioflag >> IO_SEQSHIFT; ip = VTOI(vp); #ifdef INVARIANTS if (uio->uio_rw != UIO_WRITE) panic("ffs_write: mode"); #endif switch (vp->v_type) { case VREG: if (ioflag & IO_APPEND) uio->uio_offset = ip->i_size; if ((ip->i_flags & APPEND) && uio->uio_offset != ip->i_size) return (EPERM); /* FALLTHROUGH */ case VLNK: break; case VDIR: panic("ffs_write: dir write"); break; default: panic("ffs_write: type %p %d (%d,%d)", vp, (int)vp->v_type, (int)uio->uio_offset, (int)uio->uio_resid ); } KASSERT(uio->uio_resid >= 0, ("ffs_write: uio->uio_resid < 0")); KASSERT(uio->uio_offset >= 0, ("ffs_write: uio->uio_offset < 0")); fs = ip->i_fs; if ((uoff_t)uio->uio_offset + uio->uio_resid > fs->fs_maxfilesize) return (EFBIG); /* * Maybe this should be above the vnode op call, but so long as * file servers have no limits, I don't think it matters. */ if (vn_rlimit_fsize(vp, uio, uio->uio_td)) return (EFBIG); resid = uio->uio_resid; osize = ip->i_size; if (seqcount > BA_SEQMAX) flags = BA_SEQMAX << BA_SEQSHIFT; else flags = seqcount << BA_SEQSHIFT; if ((ioflag & IO_SYNC) && !DOINGASYNC(vp)) flags |= IO_SYNC; flags |= BA_UNMAPPED; for (error = 0; uio->uio_resid > 0;) { lbn = lblkno(fs, uio->uio_offset); blkoffset = blkoff(fs, uio->uio_offset); xfersize = fs->fs_bsize - blkoffset; if (uio->uio_resid < xfersize) xfersize = uio->uio_resid; if (uio->uio_offset + xfersize > ip->i_size) vnode_pager_setsize(vp, uio->uio_offset + xfersize); /* * We must perform a read-before-write if the transfer size * does not cover the entire buffer. */ if (fs->fs_bsize > xfersize) flags |= BA_CLRBUF; else flags &= ~BA_CLRBUF; /* XXX is uio->uio_offset the right thing here? */ error = UFS_BALLOC(vp, uio->uio_offset, xfersize, ap->a_cred, flags, &bp); if (error != 0) { vnode_pager_setsize(vp, ip->i_size); break; } if (ioflag & IO_DIRECT) bp->b_flags |= B_DIRECT; if ((ioflag & (IO_SYNC|IO_INVAL)) == (IO_SYNC|IO_INVAL)) bp->b_flags |= B_NOCACHE; if (uio->uio_offset + xfersize > ip->i_size) { ip->i_size = uio->uio_offset + xfersize; DIP_SET(ip, i_size, ip->i_size); } size = blksize(fs, ip, lbn) - bp->b_resid; if (size < xfersize) xfersize = size; if ((bp->b_flags & B_UNMAPPED) == 0) { error = vn_io_fault_uiomove((char *)bp->b_data + blkoffset, (int)xfersize, uio); } else { error = vn_io_fault_pgmove(bp->b_pages, blkoffset, (int)xfersize, uio); } /* * If the buffer is not already filled and we encounter an * error while trying to fill it, we have to clear out any * garbage data from the pages instantiated for the buffer. * If we do not, a failed uiomove() during a write can leave * the prior contents of the pages exposed to a userland mmap. * * Note that we need only clear buffers with a transfer size * equal to the block size because buffers with a shorter * transfer size were cleared above by the call to UFS_BALLOC() * with the BA_CLRBUF flag set. * * If the source region for uiomove identically mmaps the * buffer, uiomove() performed the NOP copy, and the buffer * content remains valid because the page fault handler * validated the pages. */ if (error != 0 && (bp->b_flags & B_CACHE) == 0 && fs->fs_bsize == xfersize) vfs_bio_clrbuf(bp); if ((ioflag & (IO_VMIO|IO_DIRECT)) && (LIST_EMPTY(&bp->b_dep))) { bp->b_flags |= B_RELBUF; } /* * If IO_SYNC each buffer is written synchronously. Otherwise * if we have a severe page deficiency write the buffer * asynchronously. Otherwise try to cluster, and if that * doesn't do it then either do an async write (if O_DIRECT), * or a delayed write (if not). */ if (ioflag & IO_SYNC) { (void)bwrite(bp); } else if (vm_page_count_severe() || buf_dirty_count_severe() || (ioflag & IO_ASYNC)) { bp->b_flags |= B_CLUSTEROK; bawrite(bp); } else if (xfersize + blkoffset == fs->fs_bsize) { if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) { bp->b_flags |= B_CLUSTEROK; cluster_write(vp, bp, ip->i_size, seqcount, GB_UNMAPPED); } else { bawrite(bp); } } else if (ioflag & IO_DIRECT) { bp->b_flags |= B_CLUSTEROK; bawrite(bp); } else { bp->b_flags |= B_CLUSTEROK; bdwrite(bp); } if (error || xfersize == 0) break; ip->i_flag |= IN_CHANGE | IN_UPDATE; } /* * If we successfully wrote any data, and we are not the superuser * we clear the setuid and setgid bits as a precaution against * tampering. */ if ((ip->i_mode & (ISUID | ISGID)) && resid > uio->uio_resid && ap->a_cred) { if (priv_check_cred(ap->a_cred, PRIV_VFS_RETAINSUGID, 0)) { ip->i_mode &= ~(ISUID | ISGID); DIP_SET(ip, i_mode, ip->i_mode); } } if (error) { if (ioflag & IO_UNIT) { (void)ffs_truncate(vp, osize, IO_NORMAL | (ioflag & IO_SYNC), ap->a_cred); uio->uio_offset -= resid - uio->uio_resid; uio->uio_resid = resid; } } else if (resid > uio->uio_resid && (ioflag & IO_SYNC)) error = ffs_update(vp, 1); return (error); } /* * get page routine */ static int ffs_getpages(ap) struct vop_getpages_args *ap; { int i; vm_page_t mreq; int pcount; pcount = round_page(ap->a_count) / PAGE_SIZE; mreq = ap->a_m[ap->a_reqpage]; /* * if ANY DEV_BSIZE blocks are valid on a large filesystem block, * then the entire page is valid. Since the page may be mapped, * user programs might reference data beyond the actual end of file * occuring within the page. We have to zero that data. */ VM_OBJECT_WLOCK(mreq->object); if (mreq->valid) { if (mreq->valid != VM_PAGE_BITS_ALL) vm_page_zero_invalid(mreq, TRUE); for (i = 0; i < pcount; i++) { if (i != ap->a_reqpage) { vm_page_lock(ap->a_m[i]); vm_page_free(ap->a_m[i]); vm_page_unlock(ap->a_m[i]); } } VM_OBJECT_WUNLOCK(mreq->object); return VM_PAGER_OK; } VM_OBJECT_WUNLOCK(mreq->object); return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, ap->a_reqpage); } /* * Extended attribute area reading. */ static int ffs_extread(struct vnode *vp, struct uio *uio, int ioflag) { struct inode *ip; struct ufs2_dinode *dp; struct fs *fs; struct buf *bp; ufs_lbn_t lbn, nextlbn; off_t bytesinfile; long size, xfersize, blkoffset; ssize_t orig_resid; int error; ip = VTOI(vp); fs = ip->i_fs; dp = ip->i_din2; #ifdef INVARIANTS if (uio->uio_rw != UIO_READ || fs->fs_magic != FS_UFS2_MAGIC) panic("ffs_extread: mode"); #endif orig_resid = uio->uio_resid; KASSERT(orig_resid >= 0, ("ffs_extread: uio->uio_resid < 0")); if (orig_resid == 0) return (0); KASSERT(uio->uio_offset >= 0, ("ffs_extread: uio->uio_offset < 0")); for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) { if ((bytesinfile = dp->di_extsize - uio->uio_offset) <= 0) break; lbn = lblkno(fs, uio->uio_offset); nextlbn = lbn + 1; /* * size of buffer. The buffer representing the * end of the file is rounded up to the size of * the block type ( fragment or full block, * depending ). */ size = sblksize(fs, dp->di_extsize, lbn); blkoffset = blkoff(fs, uio->uio_offset); /* * The amount we want to transfer in this iteration is * one FS block less the amount of the data before * our startpoint (duh!) */ xfersize = fs->fs_bsize - blkoffset; /* * But if we actually want less than the block, * or the file doesn't have a whole block more of data, * then use the lesser number. */ if (uio->uio_resid < xfersize) xfersize = uio->uio_resid; if (bytesinfile < xfersize) xfersize = bytesinfile; if (lblktosize(fs, nextlbn) >= dp->di_extsize) { /* * Don't do readahead if this is the end of the info. */ error = bread(vp, -1 - lbn, size, NOCRED, &bp); } else { /* * If we have a second block, then * fire off a request for a readahead * as well as a read. Note that the 4th and 5th * arguments point to arrays of the size specified in * the 6th argument. */ u_int nextsize = sblksize(fs, dp->di_extsize, nextlbn); nextlbn = -1 - nextlbn; error = breadn(vp, -1 - lbn, size, &nextlbn, &nextsize, 1, NOCRED, &bp); } if (error) { brelse(bp); bp = NULL; break; } /* * If IO_DIRECT then set B_DIRECT for the buffer. This * will cause us to attempt to release the buffer later on * and will cause the buffer cache to attempt to free the * underlying pages. */ if (ioflag & IO_DIRECT) bp->b_flags |= B_DIRECT; /* * We should only get non-zero b_resid when an I/O error * has occurred, which should cause us to break above. * However, if the short read did not cause an error, * then we want to ensure that we do not uiomove bad * or uninitialized data. */ size -= bp->b_resid; if (size < xfersize) { if (size == 0) break; xfersize = size; } error = uiomove((char *)bp->b_data + blkoffset, (int)xfersize, uio); if (error) break; if ((ioflag & (IO_VMIO|IO_DIRECT)) && (LIST_EMPTY(&bp->b_dep))) { /* * If there are no dependencies, and it's VMIO, * then we don't need the buf, mark it available * for freeing. For non-direct VMIO reads, the VM * has the data. */ bp->b_flags |= B_RELBUF; brelse(bp); } else { /* * Otherwise let whoever * made the request take care of * freeing it. We just queue * it onto another list. */ bqrelse(bp); } } /* * This can only happen in the case of an error * because the loop above resets bp to NULL on each iteration * and on normal completion has not set a new value into it. * so it must have come from a 'break' statement */ if (bp != NULL) { if ((ioflag & (IO_VMIO|IO_DIRECT)) && (LIST_EMPTY(&bp->b_dep))) { bp->b_flags |= B_RELBUF; brelse(bp); } else { bqrelse(bp); } } return (error); } /* * Extended attribute area writing. */ static int ffs_extwrite(struct vnode *vp, struct uio *uio, int ioflag, struct ucred *ucred) { struct inode *ip; struct ufs2_dinode *dp; struct fs *fs; struct buf *bp; ufs_lbn_t lbn; off_t osize; ssize_t resid; int blkoffset, error, flags, size, xfersize; ip = VTOI(vp); fs = ip->i_fs; dp = ip->i_din2; #ifdef INVARIANTS if (uio->uio_rw != UIO_WRITE || fs->fs_magic != FS_UFS2_MAGIC) panic("ffs_extwrite: mode"); #endif if (ioflag & IO_APPEND) uio->uio_offset = dp->di_extsize; KASSERT(uio->uio_offset >= 0, ("ffs_extwrite: uio->uio_offset < 0")); KASSERT(uio->uio_resid >= 0, ("ffs_extwrite: uio->uio_resid < 0")); if ((uoff_t)uio->uio_offset + uio->uio_resid > NXADDR * fs->fs_bsize) return (EFBIG); resid = uio->uio_resid; osize = dp->di_extsize; flags = IO_EXT; if ((ioflag & IO_SYNC) && !DOINGASYNC(vp)) flags |= IO_SYNC; for (error = 0; uio->uio_resid > 0;) { lbn = lblkno(fs, uio->uio_offset); blkoffset = blkoff(fs, uio->uio_offset); xfersize = fs->fs_bsize - blkoffset; if (uio->uio_resid < xfersize) xfersize = uio->uio_resid; /* * We must perform a read-before-write if the transfer size * does not cover the entire buffer. */ if (fs->fs_bsize > xfersize) flags |= BA_CLRBUF; else flags &= ~BA_CLRBUF; error = UFS_BALLOC(vp, uio->uio_offset, xfersize, ucred, flags, &bp); if (error != 0) break; /* * If the buffer is not valid we have to clear out any * garbage data from the pages instantiated for the buffer. * If we do not, a failed uiomove() during a write can leave * the prior contents of the pages exposed to a userland * mmap(). XXX deal with uiomove() errors a better way. */ if ((bp->b_flags & B_CACHE) == 0 && fs->fs_bsize <= xfersize) vfs_bio_clrbuf(bp); if (ioflag & IO_DIRECT) bp->b_flags |= B_DIRECT; if (uio->uio_offset + xfersize > dp->di_extsize) dp->di_extsize = uio->uio_offset + xfersize; size = sblksize(fs, dp->di_extsize, lbn) - bp->b_resid; if (size < xfersize) xfersize = size; error = uiomove((char *)bp->b_data + blkoffset, (int)xfersize, uio); if ((ioflag & (IO_VMIO|IO_DIRECT)) && (LIST_EMPTY(&bp->b_dep))) { bp->b_flags |= B_RELBUF; } /* * If IO_SYNC each buffer is written synchronously. Otherwise * if we have a severe page deficiency write the buffer * asynchronously. Otherwise try to cluster, and if that * doesn't do it then either do an async write (if O_DIRECT), * or a delayed write (if not). */ if (ioflag & IO_SYNC) { (void)bwrite(bp); } else if (vm_page_count_severe() || buf_dirty_count_severe() || xfersize + blkoffset == fs->fs_bsize || (ioflag & (IO_ASYNC | IO_DIRECT))) bawrite(bp); else bdwrite(bp); if (error || xfersize == 0) break; ip->i_flag |= IN_CHANGE; } /* * If we successfully wrote any data, and we are not the superuser * we clear the setuid and setgid bits as a precaution against * tampering. */ if ((ip->i_mode & (ISUID | ISGID)) && resid > uio->uio_resid && ucred) { if (priv_check_cred(ucred, PRIV_VFS_RETAINSUGID, 0)) { ip->i_mode &= ~(ISUID | ISGID); dp->di_mode = ip->i_mode; } } if (error) { if (ioflag & IO_UNIT) { (void)ffs_truncate(vp, osize, IO_EXT | (ioflag&IO_SYNC), ucred); uio->uio_offset -= resid - uio->uio_resid; uio->uio_resid = resid; } } else if (resid > uio->uio_resid && (ioflag & IO_SYNC)) error = ffs_update(vp, 1); return (error); } /* * Vnode operating to retrieve a named extended attribute. * * Locate a particular EA (nspace:name) in the area (ptr:length), and return * the length of the EA, and possibly the pointer to the entry and to the data. */ static int ffs_findextattr(u_char *ptr, u_int length, int nspace, const char *name, u_char **eap, u_char **eac) { u_char *p, *pe, *pn, *p0; int eapad1, eapad2, ealength, ealen, nlen; uint32_t ul; pe = ptr + length; nlen = strlen(name); for (p = ptr; p < pe; p = pn) { p0 = p; bcopy(p, &ul, sizeof(ul)); pn = p + ul; /* make sure this entry is complete */ if (pn > pe) break; p += sizeof(uint32_t); if (*p != nspace) continue; p++; eapad2 = *p++; if (*p != nlen) continue; p++; if (bcmp(p, name, nlen)) continue; ealength = sizeof(uint32_t) + 3 + nlen; eapad1 = 8 - (ealength % 8); if (eapad1 == 8) eapad1 = 0; ealength += eapad1; ealen = ul - ealength - eapad2; p += nlen + eapad1; if (eap != NULL) *eap = p0; if (eac != NULL) *eac = p; return (ealen); } return(-1); } static int ffs_rdextattr(u_char **p, struct vnode *vp, struct thread *td, int extra) { struct inode *ip; struct ufs2_dinode *dp; struct fs *fs; struct uio luio; struct iovec liovec; u_int easize; int error; u_char *eae; ip = VTOI(vp); fs = ip->i_fs; dp = ip->i_din2; easize = dp->di_extsize; if ((uoff_t)easize + extra > NXADDR * fs->fs_bsize) return (EFBIG); eae = malloc(easize + extra, M_TEMP, M_WAITOK); liovec.iov_base = eae; liovec.iov_len = easize; luio.uio_iov = &liovec; luio.uio_iovcnt = 1; luio.uio_offset = 0; luio.uio_resid = easize; luio.uio_segflg = UIO_SYSSPACE; luio.uio_rw = UIO_READ; luio.uio_td = td; error = ffs_extread(vp, &luio, IO_EXT | IO_SYNC); if (error) { free(eae, M_TEMP); return(error); } *p = eae; return (0); } static void ffs_lock_ea(struct vnode *vp) { struct inode *ip; ip = VTOI(vp); VI_LOCK(vp); while (ip->i_flag & IN_EA_LOCKED) { ip->i_flag |= IN_EA_LOCKWAIT; msleep(&ip->i_ea_refs, &vp->v_interlock, PINOD + 2, "ufs_ea", 0); } ip->i_flag |= IN_EA_LOCKED; VI_UNLOCK(vp); } static void ffs_unlock_ea(struct vnode *vp) { struct inode *ip; ip = VTOI(vp); VI_LOCK(vp); if (ip->i_flag & IN_EA_LOCKWAIT) wakeup(&ip->i_ea_refs); ip->i_flag &= ~(IN_EA_LOCKED | IN_EA_LOCKWAIT); VI_UNLOCK(vp); } static int ffs_open_ea(struct vnode *vp, struct ucred *cred, struct thread *td) { struct inode *ip; struct ufs2_dinode *dp; int error; ip = VTOI(vp); ffs_lock_ea(vp); if (ip->i_ea_area != NULL) { ip->i_ea_refs++; ffs_unlock_ea(vp); return (0); } dp = ip->i_din2; error = ffs_rdextattr(&ip->i_ea_area, vp, td, 0); if (error) { ffs_unlock_ea(vp); return (error); } ip->i_ea_len = dp->di_extsize; ip->i_ea_error = 0; ip->i_ea_refs++; ffs_unlock_ea(vp); return (0); } /* * Vnode extattr transaction commit/abort */ static int ffs_close_ea(struct vnode *vp, int commit, struct ucred *cred, struct thread *td) { struct inode *ip; struct uio luio; struct iovec liovec; int error; struct ufs2_dinode *dp; ip = VTOI(vp); ffs_lock_ea(vp); if (ip->i_ea_area == NULL) { ffs_unlock_ea(vp); return (EINVAL); } dp = ip->i_din2; error = ip->i_ea_error; if (commit && error == 0) { ASSERT_VOP_ELOCKED(vp, "ffs_close_ea commit"); if (cred == NOCRED) cred = vp->v_mount->mnt_cred; liovec.iov_base = ip->i_ea_area; liovec.iov_len = ip->i_ea_len; luio.uio_iov = &liovec; luio.uio_iovcnt = 1; luio.uio_offset = 0; luio.uio_resid = ip->i_ea_len; luio.uio_segflg = UIO_SYSSPACE; luio.uio_rw = UIO_WRITE; luio.uio_td = td; /* XXX: I'm not happy about truncating to zero size */ if (ip->i_ea_len < dp->di_extsize) error = ffs_truncate(vp, 0, IO_EXT, cred); error = ffs_extwrite(vp, &luio, IO_EXT | IO_SYNC, cred); } if (--ip->i_ea_refs == 0) { free(ip->i_ea_area, M_TEMP); ip->i_ea_area = NULL; ip->i_ea_len = 0; ip->i_ea_error = 0; } ffs_unlock_ea(vp); return (error); } /* * Vnode extattr strategy routine for fifos. * * We need to check for a read or write of the external attributes. * Otherwise we just fall through and do the usual thing. */ static int ffsext_strategy(struct vop_strategy_args *ap) /* struct vop_strategy_args { struct vnodeop_desc *a_desc; struct vnode *a_vp; struct buf *a_bp; }; */ { struct vnode *vp; daddr_t lbn; vp = ap->a_vp; lbn = ap->a_bp->b_lblkno; if (VTOI(vp)->i_fs->fs_magic == FS_UFS2_MAGIC && lbn < 0 && lbn >= -NXADDR) return (VOP_STRATEGY_APV(&ufs_vnodeops, ap)); if (vp->v_type == VFIFO) return (VOP_STRATEGY_APV(&ufs_fifoops, ap)); panic("spec nodes went here"); } /* * Vnode extattr transaction commit/abort */ static int ffs_openextattr(struct vop_openextattr_args *ap) /* struct vop_openextattr_args { struct vnodeop_desc *a_desc; struct vnode *a_vp; IN struct ucred *a_cred; IN struct thread *a_td; }; */ { struct inode *ip; struct fs *fs; ip = VTOI(ap->a_vp); fs = ip->i_fs; if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK) return (EOPNOTSUPP); return (ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td)); } /* * Vnode extattr transaction commit/abort */ static int ffs_closeextattr(struct vop_closeextattr_args *ap) /* struct vop_closeextattr_args { struct vnodeop_desc *a_desc; struct vnode *a_vp; int a_commit; IN struct ucred *a_cred; IN struct thread *a_td; }; */ { struct inode *ip; struct fs *fs; ip = VTOI(ap->a_vp); fs = ip->i_fs; if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK) return (EOPNOTSUPP); if (ap->a_commit && (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)) return (EROFS); return (ffs_close_ea(ap->a_vp, ap->a_commit, ap->a_cred, ap->a_td)); } /* * Vnode operation to remove a named attribute. */ static int ffs_deleteextattr(struct vop_deleteextattr_args *ap) /* vop_deleteextattr { IN struct vnode *a_vp; IN int a_attrnamespace; IN const char *a_name; IN struct ucred *a_cred; IN struct thread *a_td; }; */ { struct inode *ip; struct fs *fs; uint32_t ealength, ul; int ealen, olen, eapad1, eapad2, error, i, easize; u_char *eae, *p; ip = VTOI(ap->a_vp); fs = ip->i_fs; if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK) return (EOPNOTSUPP); if (strlen(ap->a_name) == 0) return (EINVAL); if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, ap->a_cred, ap->a_td, VWRITE); if (error) { /* * ffs_lock_ea is not needed there, because the vnode * must be exclusively locked. */ if (ip->i_ea_area != NULL && ip->i_ea_error == 0) ip->i_ea_error = error; return (error); } error = ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td); if (error) return (error); ealength = eapad1 = ealen = eapad2 = 0; eae = malloc(ip->i_ea_len, M_TEMP, M_WAITOK); bcopy(ip->i_ea_area, eae, ip->i_ea_len); easize = ip->i_ea_len; olen = ffs_findextattr(eae, easize, ap->a_attrnamespace, ap->a_name, &p, NULL); if (olen == -1) { /* delete but nonexistent */ free(eae, M_TEMP); ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td); return(ENOATTR); } bcopy(p, &ul, sizeof ul); i = p - eae + ul; if (ul != ealength) { bcopy(p + ul, p + ealength, easize - i); easize += (ealength - ul); } if (easize > NXADDR * fs->fs_bsize) { free(eae, M_TEMP); ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td); if (ip->i_ea_area != NULL && ip->i_ea_error == 0) ip->i_ea_error = ENOSPC; return(ENOSPC); } p = ip->i_ea_area; ip->i_ea_area = eae; ip->i_ea_len = easize; free(p, M_TEMP); error = ffs_close_ea(ap->a_vp, 1, ap->a_cred, ap->a_td); return(error); } /* * Vnode operation to retrieve a named extended attribute. */ static int ffs_getextattr(struct vop_getextattr_args *ap) /* vop_getextattr { IN struct vnode *a_vp; IN int a_attrnamespace; IN const char *a_name; INOUT struct uio *a_uio; OUT size_t *a_size; IN struct ucred *a_cred; IN struct thread *a_td; }; */ { struct inode *ip; struct fs *fs; u_char *eae, *p; unsigned easize; int error, ealen; ip = VTOI(ap->a_vp); fs = ip->i_fs; if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK) return (EOPNOTSUPP); error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, ap->a_cred, ap->a_td, VREAD); if (error) return (error); error = ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td); if (error) return (error); eae = ip->i_ea_area; easize = ip->i_ea_len; ealen = ffs_findextattr(eae, easize, ap->a_attrnamespace, ap->a_name, NULL, &p); if (ealen >= 0) { error = 0; if (ap->a_size != NULL) *ap->a_size = ealen; else if (ap->a_uio != NULL) error = uiomove(p, ealen, ap->a_uio); } else error = ENOATTR; ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td); return(error); } /* * Vnode operation to retrieve extended attributes on a vnode. */ static int ffs_listextattr(struct vop_listextattr_args *ap) /* vop_listextattr { IN struct vnode *a_vp; IN int a_attrnamespace; INOUT struct uio *a_uio; OUT size_t *a_size; IN struct ucred *a_cred; IN struct thread *a_td; }; */ { struct inode *ip; struct fs *fs; u_char *eae, *p, *pe, *pn; unsigned easize; uint32_t ul; int error, ealen; ip = VTOI(ap->a_vp); fs = ip->i_fs; if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK) return (EOPNOTSUPP); error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, ap->a_cred, ap->a_td, VREAD); if (error) return (error); error = ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td); if (error) return (error); eae = ip->i_ea_area; easize = ip->i_ea_len; error = 0; if (ap->a_size != NULL) *ap->a_size = 0; pe = eae + easize; for(p = eae; error == 0 && p < pe; p = pn) { bcopy(p, &ul, sizeof(ul)); pn = p + ul; if (pn > pe) break; p += sizeof(ul); if (*p++ != ap->a_attrnamespace) continue; p++; /* pad2 */ ealen = *p; if (ap->a_size != NULL) { *ap->a_size += ealen + 1; } else if (ap->a_uio != NULL) { error = uiomove(p, ealen + 1, ap->a_uio); } } ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td); return(error); } /* * Vnode operation to set a named attribute. */ static int ffs_setextattr(struct vop_setextattr_args *ap) /* vop_setextattr { IN struct vnode *a_vp; IN int a_attrnamespace; IN const char *a_name; INOUT struct uio *a_uio; IN struct ucred *a_cred; IN struct thread *a_td; }; */ { struct inode *ip; struct fs *fs; uint32_t ealength, ul; ssize_t ealen; int olen, eapad1, eapad2, error, i, easize; u_char *eae, *p; ip = VTOI(ap->a_vp); fs = ip->i_fs; if (ap->a_vp->v_type == VCHR || ap->a_vp->v_type == VBLK) return (EOPNOTSUPP); if (strlen(ap->a_name) == 0) return (EINVAL); /* XXX Now unsupported API to delete EAs using NULL uio. */ if (ap->a_uio == NULL) return (EOPNOTSUPP); if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); ealen = ap->a_uio->uio_resid; if (ealen < 0 || ealen > lblktosize(fs, NXADDR)) return (EINVAL); error = extattr_check_cred(ap->a_vp, ap->a_attrnamespace, ap->a_cred, ap->a_td, VWRITE); if (error) { /* * ffs_lock_ea is not needed there, because the vnode * must be exclusively locked. */ if (ip->i_ea_area != NULL && ip->i_ea_error == 0) ip->i_ea_error = error; return (error); } error = ffs_open_ea(ap->a_vp, ap->a_cred, ap->a_td); if (error) return (error); ealength = sizeof(uint32_t) + 3 + strlen(ap->a_name); eapad1 = 8 - (ealength % 8); if (eapad1 == 8) eapad1 = 0; eapad2 = 8 - (ealen % 8); if (eapad2 == 8) eapad2 = 0; ealength += eapad1 + ealen + eapad2; eae = malloc(ip->i_ea_len + ealength, M_TEMP, M_WAITOK); bcopy(ip->i_ea_area, eae, ip->i_ea_len); easize = ip->i_ea_len; olen = ffs_findextattr(eae, easize, ap->a_attrnamespace, ap->a_name, &p, NULL); if (olen == -1) { /* new, append at end */ p = eae + easize; easize += ealength; } else { bcopy(p, &ul, sizeof ul); i = p - eae + ul; if (ul != ealength) { bcopy(p + ul, p + ealength, easize - i); easize += (ealength - ul); } } if (easize > lblktosize(fs, NXADDR)) { free(eae, M_TEMP); ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td); if (ip->i_ea_area != NULL && ip->i_ea_error == 0) ip->i_ea_error = ENOSPC; return(ENOSPC); } bcopy(&ealength, p, sizeof(ealength)); p += sizeof(ealength); *p++ = ap->a_attrnamespace; *p++ = eapad2; *p++ = strlen(ap->a_name); strcpy(p, ap->a_name); p += strlen(ap->a_name); bzero(p, eapad1); p += eapad1; error = uiomove(p, ealen, ap->a_uio); if (error) { free(eae, M_TEMP); ffs_close_ea(ap->a_vp, 0, ap->a_cred, ap->a_td); if (ip->i_ea_area != NULL && ip->i_ea_error == 0) ip->i_ea_error = error; return(error); } p += ealen; bzero(p, eapad2); p = ip->i_ea_area; ip->i_ea_area = eae; ip->i_ea_len = easize; free(p, M_TEMP); error = ffs_close_ea(ap->a_vp, 1, ap->a_cred, ap->a_td); return(error); } /* * Vnode pointer to File handle */ static int ffs_vptofh(struct vop_vptofh_args *ap) /* vop_vptofh { IN struct vnode *a_vp; IN struct fid *a_fhp; }; */ { struct inode *ip; struct ufid *ufhp; ip = VTOI(ap->a_vp); ufhp = (struct ufid *)ap->a_fhp; ufhp->ufid_len = sizeof(struct ufid); ufhp->ufid_ino = ip->i_number; ufhp->ufid_gen = ip->i_gen; return (0); }