ext2_vfsops.c revision 30469
112115Sdyson/* 212115Sdyson * modified for EXT2FS support in Lites 1.1 312115Sdyson * 412115Sdyson * Aug 1995, Godmar Back (gback@cs.utah.edu) 512115Sdyson * University of Utah, Department of Computer Science 612115Sdyson */ 712115Sdyson/* 812115Sdyson * Copyright (c) 1989, 1991, 1993, 1994 912115Sdyson * The Regents of the University of California. All rights reserved. 1012115Sdyson * 1112115Sdyson * Redistribution and use in source and binary forms, with or without 1212115Sdyson * modification, are permitted provided that the following conditions 1312115Sdyson * are met: 1412115Sdyson * 1. Redistributions of source code must retain the above copyright 1512115Sdyson * notice, this list of conditions and the following disclaimer. 1612115Sdyson * 2. Redistributions in binary form must reproduce the above copyright 1712115Sdyson * notice, this list of conditions and the following disclaimer in the 1812115Sdyson * documentation and/or other materials provided with the distribution. 1912115Sdyson * 3. All advertising materials mentioning features or use of this software 2012115Sdyson * must display the following acknowledgement: 2112115Sdyson * This product includes software developed by the University of 2212115Sdyson * California, Berkeley and its contributors. 2312115Sdyson * 4. Neither the name of the University nor the names of its contributors 2412115Sdyson * may be used to endorse or promote products derived from this software 2512115Sdyson * without specific prior written permission. 2612115Sdyson * 2712115Sdyson * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2812115Sdyson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2912115Sdyson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 3012115Sdyson * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3112115Sdyson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3212115Sdyson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3312115Sdyson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3412115Sdyson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3512115Sdyson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3612115Sdyson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3712115Sdyson * SUCH DAMAGE. 3812115Sdyson * 3912115Sdyson * @(#)ffs_vfsops.c 8.8 (Berkeley) 4/18/94 4012115Sdyson */ 4112115Sdyson 4212115Sdyson#if !defined(__FreeBSD__) 4312115Sdyson#include "quota.h" 4413260Swollman#else 4513260Swollman#include "opt_quota.h" 4612115Sdyson#endif 4712115Sdyson 4812115Sdyson#include <sys/param.h> 4912115Sdyson#include <sys/systm.h> 5012115Sdyson#include <sys/namei.h> 5112115Sdyson#include <sys/proc.h> 5212115Sdyson#include <sys/kernel.h> 5312115Sdyson#include <sys/vnode.h> 5412115Sdyson#include <sys/mount.h> 5512115Sdyson#include <sys/buf.h> 5629906Skato#include <sys/conf.h> 5724131Sbde#include <sys/fcntl.h> 5812115Sdyson#include <sys/disklabel.h> 5912115Sdyson#include <sys/malloc.h> 6012115Sdyson#include <sys/stat.h> 6112115Sdyson 6212115Sdyson#include <miscfs/specfs/specdev.h> 6312115Sdyson 6412115Sdyson#include <ufs/ufs/quota.h> 6512115Sdyson#include <ufs/ufs/ufsmount.h> 6612115Sdyson#include <ufs/ufs/inode.h> 6712115Sdyson#include <ufs/ufs/ufs_extern.h> 6812115Sdyson 6912115Sdyson#include <gnu/ext2fs/fs.h> 7012115Sdyson#include <gnu/ext2fs/ext2_extern.h> 7112115Sdyson#include <gnu/ext2fs/ext2_fs.h> 7212115Sdyson#include <gnu/ext2fs/ext2_fs_sb.h> 7312115Sdyson 7428270Swollmanstatic int ext2_fhtovp __P((struct mount *, struct fid *, struct sockaddr *, 7512911Sphk struct vnode **, int *, struct ucred **)); 7612911Sphkstatic int ext2_flushfiles __P((struct mount *mp, int flags, struct proc *p)); 7712911Sphkstatic int ext2_mount __P((struct mount *, 7812911Sphk char *, caddr_t, struct nameidata *, struct proc *)); 7912911Sphkstatic int ext2_mountfs __P((struct vnode *, struct mount *, struct proc *)); 8012911Sphkstatic int ext2_reload __P((struct mount *mountp, struct ucred *cred, 8112911Sphk struct proc *p)); 8212911Sphkstatic int ext2_sbupdate __P((struct ufsmount *, int)); 8312911Sphkstatic int ext2_statfs __P((struct mount *, struct statfs *, struct proc *)); 8412911Sphkstatic int ext2_sync __P((struct mount *, int, struct ucred *, struct proc *)); 8512911Sphkstatic int ext2_unmount __P((struct mount *, int, struct proc *)); 8612911Sphkstatic int ext2_vget __P((struct mount *, ino_t, struct vnode **)); 8712911Sphkstatic int ext2_vptofh __P((struct vnode *, struct fid *)); 8812115Sdyson 8930354Sphkstatic MALLOC_DEFINE(M_EXT2NODE, "EXT2 nodes", "EXT2 Filsystem inodes"); 9030280Sphk 9112911Sphkstatic struct vfsops ext2fs_vfsops = { 9212115Sdyson ext2_mount, 9312115Sdyson ufs_start, /* empty function */ 9412115Sdyson ext2_unmount, 9512115Sdyson ufs_root, /* root inode via vget */ 9612115Sdyson ufs_quotactl, /* does operations associated with quotas */ 9712115Sdyson ext2_statfs, 9812115Sdyson ext2_sync, 9912115Sdyson ext2_vget, 10012115Sdyson ext2_fhtovp, 10112115Sdyson ext2_vptofh, 10212115Sdyson ext2_init, 10312115Sdyson}; 10412115Sdyson 10512115Sdyson#if defined(__FreeBSD__) 10612115SdysonVFS_SET(ext2fs_vfsops, ext2fs, MOUNT_EXT2FS, 0); 10712115Sdyson#define bsd_malloc malloc 10812115Sdyson#define bsd_free free 10912115Sdyson#endif 11012115Sdyson 11112115Sdysonextern u_long nextgennumber; 11212406Sdyson#ifdef __FreeBSD__ 11312911Sphkstatic int ext2fs_inode_hash_lock; 11412406Sdyson#endif 11512115Sdyson 11616322Sgpalmerstatic int compute_sb_data __P((struct vnode * devvp, 11716322Sgpalmer struct ext2_super_block * es, 11816322Sgpalmer struct ext2_sb_info * fs)); 11916322Sgpalmer 12016322Sgpalmer#ifdef notyet 12116322Sgpalmerstatic int ext2_mountroot __P((void)); 12216322Sgpalmer 12312115Sdyson/* 12416322Sgpalmer * Called by main() when ext2fs is going to be mounted as root. 12512115Sdyson * 12612115Sdyson * Name is updated by mount(8) after booting. 12712115Sdyson */ 12812115Sdyson#define ROOTNAME "root_device" 12912115Sdyson 13012911Sphkstatic int 13112115Sdysonext2_mountroot() 13212115Sdyson{ 13312115Sdyson#if !defined(__FreeBSD__) 13412115Sdyson extern struct vnode *rootvp; 13512115Sdyson#endif 13612115Sdyson register struct ext2_sb_info *fs; 13712115Sdyson register struct mount *mp; 13812115Sdyson#if defined(__FreeBSD__) 13912115Sdyson struct proc *p = curproc; 14012115Sdyson#else 14112115Sdyson struct proc *p = get_proc(); /* XXX */ 14212115Sdyson#endif 14312115Sdyson struct ufsmount *ump; 14412115Sdyson u_int size; 14512115Sdyson int error; 14612115Sdyson 14729208Sbde if ((error = bdevvp(rootdev, &rootvp))) { 14829208Sbde printf("ext2_mountroot: can't find rootvp"); 14929208Sbde return (error); 15029208Sbde } 15112115Sdyson mp = bsd_malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK); 15212115Sdyson bzero((char *)mp, (u_long)sizeof(struct mount)); 15312115Sdyson mp->mnt_op = &ext2fs_vfsops; 15412115Sdyson mp->mnt_flag = MNT_RDONLY; 15529888Skato if (bdevsw[major(rootdev)]->d_flags & D_NOCLUSTERR) 15629888Skato mp->mnt_flag |= MNT_NOCLUSTERR; 15729888Skato if (bdevsw[major(rootdev)]->d_flags & D_NOCLUSTERW) 15829888Skato mp->mnt_flag |= MNT_NOCLUSTERW; 15912115Sdyson if (error = ext2_mountfs(rootvp, mp, p)) { 16012115Sdyson bsd_free(mp, M_MOUNT); 16112115Sdyson return (error); 16212115Sdyson } 16312115Sdyson if (error = vfs_lock(mp)) { 16412115Sdyson (void)ext2_unmount(mp, 0, p); 16512115Sdyson bsd_free(mp, M_MOUNT); 16612115Sdyson return (error); 16712115Sdyson } 16812115Sdyson#if defined(__FreeBSD__) 16930469Sjulian CIRCLEQ_INSERT_HEAD(&mountlist, mp, mnt_list); 17012115Sdyson#else 17112115Sdyson TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list); 17212115Sdyson#endif 17312115Sdyson mp->mnt_flag |= MNT_ROOTFS; 17412115Sdyson mp->mnt_vnodecovered = NULLVP; 17512115Sdyson ump = VFSTOUFS(mp); 17612115Sdyson fs = ump->um_e2fs; 17712115Sdyson bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt)); 17812115Sdyson fs->fs_fsmnt[0] = '/'; 17912115Sdyson bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, 18012115Sdyson MNAMELEN); 18112115Sdyson (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 18212115Sdyson &size); 18312115Sdyson bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 18412115Sdyson (void)ext2_statfs(mp, &mp->mnt_stat, p); 18512115Sdyson vfs_unlock(mp); 18612115Sdyson inittodr(fs->s_es->s_wtime); /* this helps to set the time */ 18712115Sdyson return (0); 18812115Sdyson} 18916322Sgpalmer#endif 19012115Sdyson 19112115Sdyson/* 19212115Sdyson * VFS Operations. 19312115Sdyson * 19412115Sdyson * mount system call 19512115Sdyson */ 19612911Sphkstatic int 19712115Sdysonext2_mount(mp, path, data, ndp, p) 19812115Sdyson register struct mount *mp; 19912115Sdyson char *path; 20012115Sdyson caddr_t data; /* this is actually a (struct ufs_args *) */ 20112115Sdyson struct nameidata *ndp; 20212115Sdyson struct proc *p; 20312115Sdyson{ 20412115Sdyson struct vnode *devvp; 20512115Sdyson struct ufs_args args; 20612115Sdyson struct ufsmount *ump = 0; 20712115Sdyson register struct ext2_sb_info *fs; 20812115Sdyson u_int size; 20912115Sdyson int error, flags; 21012115Sdyson 21112115Sdyson if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) 21212115Sdyson return (error); 21312115Sdyson /* 21412115Sdyson * If updating, check whether changing from read-only to 21512115Sdyson * read/write; if there is no device name, that's all we do. 21629888Skato * Disallow clearing MNT_NOCLUSTERR and MNT_NOCLUSTERW flags, 21729888Skato * if block device requests. 21812115Sdyson */ 21912115Sdyson if (mp->mnt_flag & MNT_UPDATE) { 22012115Sdyson ump = VFSTOUFS(mp); 22112115Sdyson fs = ump->um_e2fs; 22212115Sdyson error = 0; 22329888Skato if (bdevsw[major(ump->um_dev)]->d_flags & D_NOCLUSTERR) 22429888Skato mp->mnt_flag |= MNT_NOCLUSTERR; 22529888Skato if (bdevsw[major(ump->um_dev)]->d_flags & D_NOCLUSTERW) 22629888Skato mp->mnt_flag |= MNT_NOCLUSTERW; 22712115Sdyson if (fs->s_rd_only == 0 && (mp->mnt_flag & MNT_RDONLY)) { 22812115Sdyson flags = WRITECLOSE; 22912115Sdyson if (mp->mnt_flag & MNT_FORCE) 23012115Sdyson flags |= FORCECLOSE; 23122521Sdyson if (vfs_busy(mp, LK_NOWAIT, 0, p)) 23212115Sdyson return (EBUSY); 23312115Sdyson error = ext2_flushfiles(mp, flags, p); 23422521Sdyson vfs_unbusy(mp, p); 23512115Sdyson } 23612115Sdyson if (!error && (mp->mnt_flag & MNT_RELOAD)) 23712115Sdyson error = ext2_reload(mp, ndp->ni_cnd.cn_cred, p); 23812115Sdyson if (error) 23912115Sdyson return (error); 24012115Sdyson if (fs->s_rd_only && (mp->mnt_flag & MNT_WANTRDWR)) 24112115Sdyson fs->s_rd_only = 0; 24212115Sdyson if (fs->s_rd_only == 0) { 24312115Sdyson /* don't say it's clean */ 24412115Sdyson fs->s_es->s_state &= ~EXT2_VALID_FS; 24512115Sdyson ext2_sbupdate(ump, MNT_WAIT); 24612115Sdyson } 24712115Sdyson if (args.fspec == 0) { 24812115Sdyson /* 24912115Sdyson * Process export requests. 25012115Sdyson */ 25112115Sdyson return (vfs_export(mp, &ump->um_export, &args.export)); 25212115Sdyson } 25312115Sdyson } 25412115Sdyson /* 25512115Sdyson * Not an update, or updating the name: look up the name 25612115Sdyson * and verify that it refers to a sensible block device. 25712115Sdyson */ 25812115Sdyson NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 25912115Sdyson if (error = namei(ndp)) 26012115Sdyson return (error); 26112115Sdyson devvp = ndp->ni_vp; 26212115Sdyson 26312115Sdyson if (devvp->v_type != VBLK) { 26412115Sdyson vrele(devvp); 26512115Sdyson return (ENOTBLK); 26612115Sdyson } 26712115Sdyson if (major(devvp->v_rdev) >= nblkdev) { 26812115Sdyson vrele(devvp); 26912115Sdyson return (ENXIO); 27012115Sdyson } 27129888Skato if ((mp->mnt_flag & MNT_UPDATE) == 0) { 27229888Skato if (bdevsw[major(devvp->v_rdev)]->d_flags & D_NOCLUSTERR) 27329888Skato mp->mnt_flag |= MNT_NOCLUSTERR; 27429888Skato if (bdevsw[major(devvp->v_rdev)]->d_flags & D_NOCLUSTERW) 27529888Skato mp->mnt_flag |= MNT_NOCLUSTERW; 27612115Sdyson error = ext2_mountfs(devvp, mp, p); 27729888Skato } else { 27812115Sdyson if (devvp != ump->um_devvp) 27912115Sdyson error = EINVAL; /* needs translation */ 28012115Sdyson else 28112115Sdyson vrele(devvp); 28212115Sdyson } 28312115Sdyson if (error) { 28412115Sdyson vrele(devvp); 28512115Sdyson return (error); 28612115Sdyson } 28712115Sdyson ump = VFSTOUFS(mp); 28812115Sdyson fs = ump->um_e2fs; 28912115Sdyson (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size); 29012115Sdyson bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size); 29112115Sdyson bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, 29212115Sdyson MNAMELEN); 29312115Sdyson (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 29412115Sdyson &size); 29512115Sdyson bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 29612115Sdyson (void)ext2_statfs(mp, &mp->mnt_stat, p); 29712115Sdyson return (0); 29812115Sdyson} 29912115Sdyson 30012115Sdyson/* 30112115Sdyson * checks that the data in the descriptor blocks make sense 30212115Sdyson * this is taken from ext2/super.c 30312115Sdyson */ 30412115Sdysonstatic int ext2_check_descriptors (struct ext2_sb_info * sb) 30512115Sdyson{ 30612115Sdyson int i; 30712115Sdyson int desc_block = 0; 30812115Sdyson unsigned long block = sb->s_es->s_first_data_block; 30912115Sdyson struct ext2_group_desc * gdp = NULL; 31012115Sdyson 31112115Sdyson /* ext2_debug ("Checking group descriptors"); */ 31212115Sdyson 31312115Sdyson for (i = 0; i < sb->s_groups_count; i++) 31412115Sdyson { 31512115Sdyson /* examine next descriptor block */ 31612115Sdyson if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0) 31712115Sdyson gdp = (struct ext2_group_desc *) 31812115Sdyson sb->s_group_desc[desc_block++]->b_data; 31912115Sdyson if (gdp->bg_block_bitmap < block || 32012115Sdyson gdp->bg_block_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb)) 32112115Sdyson { 32212115Sdyson printf ("ext2_check_descriptors: " 32312115Sdyson "Block bitmap for group %d" 32412115Sdyson " not in group (block %lu)!", 32512115Sdyson i, (unsigned long) gdp->bg_block_bitmap); 32612115Sdyson return 0; 32712115Sdyson } 32812115Sdyson if (gdp->bg_inode_bitmap < block || 32912115Sdyson gdp->bg_inode_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb)) 33012115Sdyson { 33112115Sdyson printf ("ext2_check_descriptors: " 33212115Sdyson "Inode bitmap for group %d" 33312115Sdyson " not in group (block %lu)!", 33412115Sdyson i, (unsigned long) gdp->bg_inode_bitmap); 33512115Sdyson return 0; 33612115Sdyson } 33712115Sdyson if (gdp->bg_inode_table < block || 33812115Sdyson gdp->bg_inode_table + sb->s_itb_per_group >= 33912115Sdyson block + EXT2_BLOCKS_PER_GROUP(sb)) 34012115Sdyson { 34112115Sdyson printf ("ext2_check_descriptors: " 34212115Sdyson "Inode table for group %d" 34312115Sdyson " not in group (block %lu)!", 34412115Sdyson i, (unsigned long) gdp->bg_inode_table); 34512115Sdyson return 0; 34612115Sdyson } 34712115Sdyson block += EXT2_BLOCKS_PER_GROUP(sb); 34812115Sdyson gdp++; 34912115Sdyson } 35012115Sdyson return 1; 35112115Sdyson} 35212115Sdyson 35312115Sdyson/* 35412115Sdyson * this computes the fields of the ext2_sb_info structure from the 35512115Sdyson * data in the ext2_super_block structure read in 35612115Sdyson */ 35712115Sdysonstatic int compute_sb_data(devvp, es, fs) 35812115Sdyson struct vnode * devvp; 35912115Sdyson struct ext2_super_block * es; 36012115Sdyson struct ext2_sb_info * fs; 36112115Sdyson{ 36212115Sdyson int db_count, error; 36312115Sdyson int i, j; 36412115Sdyson int logic_sb_block = 1; /* XXX for now */ 36512115Sdyson 36612115Sdyson#if 1 36712115Sdyson#define V(v) 36812115Sdyson#else 36912115Sdyson#define V(v) printf(#v"= %d\n", fs->v); 37012115Sdyson#endif 37112115Sdyson 37212115Sdyson fs->s_blocksize = EXT2_MIN_BLOCK_SIZE << es->s_log_block_size; 37312115Sdyson V(s_blocksize) 37412115Sdyson fs->s_bshift = EXT2_MIN_BLOCK_LOG_SIZE + es->s_log_block_size; 37512115Sdyson V(s_bshift) 37612115Sdyson fs->s_fsbtodb = es->s_log_block_size + 1; 37712115Sdyson V(s_fsbtodb) 37812115Sdyson fs->s_qbmask = fs->s_blocksize - 1; 37912115Sdyson V(s_bmask) 38012115Sdyson fs->s_blocksize_bits = EXT2_BLOCK_SIZE_BITS(es); 38112115Sdyson V(s_blocksize_bits) 38212115Sdyson fs->s_frag_size = EXT2_MIN_FRAG_SIZE << es->s_log_frag_size; 38312115Sdyson V(s_frag_size) 38412115Sdyson if (fs->s_frag_size) 38512115Sdyson fs->s_frags_per_block = fs->s_blocksize / fs->s_frag_size; 38612115Sdyson V(s_frags_per_block) 38712115Sdyson fs->s_blocks_per_group = es->s_blocks_per_group; 38812115Sdyson V(s_blocks_per_group) 38912115Sdyson fs->s_frags_per_group = es->s_frags_per_group; 39012115Sdyson V(s_frags_per_group) 39112115Sdyson fs->s_inodes_per_group = es->s_inodes_per_group; 39212115Sdyson V(s_inodes_per_group) 39312115Sdyson fs->s_inodes_per_block = fs->s_blocksize / EXT2_INODE_SIZE; 39412115Sdyson V(s_inodes_per_block) 39512115Sdyson fs->s_itb_per_group = fs->s_inodes_per_group /fs->s_inodes_per_block; 39612115Sdyson V(s_itb_per_group) 39712115Sdyson fs->s_desc_per_block = fs->s_blocksize / sizeof (struct ext2_group_desc); 39812115Sdyson V(s_desc_per_block) 39912115Sdyson /* s_resuid / s_resgid ? */ 40012115Sdyson fs->s_groups_count = (es->s_blocks_count - 40112115Sdyson es->s_first_data_block + 40212115Sdyson EXT2_BLOCKS_PER_GROUP(fs) - 1) / 40312115Sdyson EXT2_BLOCKS_PER_GROUP(fs); 40412115Sdyson V(s_groups_count) 40512115Sdyson db_count = (fs->s_groups_count + EXT2_DESC_PER_BLOCK(fs) - 1) / 40612115Sdyson EXT2_DESC_PER_BLOCK(fs); 40712115Sdyson fs->s_db_per_group = db_count; 40812115Sdyson V(s_db_per_group) 40912115Sdyson 41012115Sdyson fs->s_group_desc = bsd_malloc(db_count * sizeof (struct buf *), 41112115Sdyson M_UFSMNT, M_WAITOK); 41212115Sdyson 41312115Sdyson /* adjust logic_sb_block */ 41412115Sdyson if(fs->s_blocksize > SBSIZE) 41512115Sdyson /* Godmar thinks: if the blocksize is greater than 1024, then 41612115Sdyson the superblock is logically part of block zero. 41712115Sdyson */ 41812115Sdyson logic_sb_block = 0; 41912115Sdyson 42012115Sdyson for (i = 0; i < db_count; i++) { 42112115Sdyson error = bread(devvp , fsbtodb(fs, logic_sb_block + i + 1), 42212115Sdyson fs->s_blocksize, NOCRED, &fs->s_group_desc[i]); 42312115Sdyson if(error) { 42412115Sdyson for (j = 0; j < i; j++) 42512115Sdyson brelse(fs->s_group_desc[j]); 42612115Sdyson bsd_free(fs->s_group_desc, M_UFSMNT); 42712115Sdyson printf("EXT2-fs: unable to read group descriptors (%d)\n", error); 42812115Sdyson return EIO; 42912115Sdyson } 43027881Sdyson /* Set the B_LOCKED flag on the buffer, then brelse() it */ 43127881Sdyson LCK_BUF(fs->s_group_desc[i]) 43212115Sdyson } 43312115Sdyson if(!ext2_check_descriptors(fs)) { 43412115Sdyson for (j = 0; j < db_count; j++) 43527881Sdyson ULCK_BUF(fs->s_group_desc[j]) 43612115Sdyson bsd_free(fs->s_group_desc, M_UFSMNT); 43712115Sdyson printf("EXT2-fs: (ext2_check_descriptors failure) " 43812115Sdyson "unable to read group descriptors\n"); 43912115Sdyson return EIO; 44012115Sdyson } 44112115Sdyson 44212115Sdyson for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) { 44312115Sdyson fs->s_inode_bitmap_number[i] = 0; 44412115Sdyson fs->s_inode_bitmap[i] = NULL; 44512115Sdyson fs->s_block_bitmap_number[i] = 0; 44612115Sdyson fs->s_block_bitmap[i] = NULL; 44712115Sdyson } 44812115Sdyson fs->s_loaded_inode_bitmaps = 0; 44912115Sdyson fs->s_loaded_block_bitmaps = 0; 45012115Sdyson return 0; 45112115Sdyson} 45212115Sdyson 45312115Sdyson/* 45412115Sdyson * Reload all incore data for a filesystem (used after running fsck on 45512115Sdyson * the root filesystem and finding things to fix). The filesystem must 45612115Sdyson * be mounted read-only. 45712115Sdyson * 45812115Sdyson * Things to do to update the mount: 45912115Sdyson * 1) invalidate all cached meta-data. 46012115Sdyson * 2) re-read superblock from disk. 46112115Sdyson * 3) re-read summary information from disk. 46212115Sdyson * 4) invalidate all inactive vnodes. 46312115Sdyson * 5) invalidate all cached file data. 46412115Sdyson * 6) re-read inode data for all active vnodes. 46512115Sdyson */ 46612911Sphkstatic int 46712115Sdysonext2_reload(mountp, cred, p) 46812115Sdyson register struct mount *mountp; 46912115Sdyson struct ucred *cred; 47012115Sdyson struct proc *p; 47112115Sdyson{ 47212115Sdyson register struct vnode *vp, *nvp, *devvp; 47312115Sdyson struct inode *ip; 47412115Sdyson struct buf *bp; 47512115Sdyson struct ext2_super_block * es; 47612115Sdyson struct ext2_sb_info *fs; 47712147Sdyson int error; 47812115Sdyson 47912115Sdyson if ((mountp->mnt_flag & MNT_RDONLY) == 0) 48012115Sdyson return (EINVAL); 48112115Sdyson /* 48212115Sdyson * Step 1: invalidate all cached meta-data. 48312115Sdyson */ 48412115Sdyson devvp = VFSTOUFS(mountp)->um_devvp; 48512115Sdyson if (vinvalbuf(devvp, 0, cred, p, 0, 0)) 48612115Sdyson panic("ext2_reload: dirty1"); 48712115Sdyson /* 48812115Sdyson * Step 2: re-read superblock from disk. 48912115Sdyson * constants have been adjusted for ext2 49012115Sdyson */ 49112115Sdyson if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) 49212115Sdyson return (error); 49312115Sdyson es = (struct ext2_super_block *)bp->b_data; 49412115Sdyson if (es->s_magic != EXT2_SUPER_MAGIC) { 49512115Sdyson if(es->s_magic == EXT2_PRE_02B_MAGIC) 49612115Sdyson printf("This filesystem bears the magic number of a pre " 49712115Sdyson "0.2b version of ext2. This is not supported by " 49812115Sdyson "Lites.\n"); 49912115Sdyson else 50012115Sdyson printf("Wrong magic number: %x (expected %x for ext2 fs\n", 50112115Sdyson es->s_magic, EXT2_SUPER_MAGIC); 50212115Sdyson brelse(bp); 50312115Sdyson return (EIO); /* XXX needs translation */ 50412115Sdyson } 50512115Sdyson fs = VFSTOUFS(mountp)->um_e2fs; 50612115Sdyson bcopy(bp->b_data, fs->s_es, sizeof(struct ext2_super_block)); 50712115Sdyson 50812115Sdyson if(error = compute_sb_data(devvp, es, fs)) { 50912115Sdyson brelse(bp); 51012115Sdyson return error; 51112115Sdyson } 51212115Sdyson#ifdef UNKLAR 51312115Sdyson if (fs->fs_sbsize < SBSIZE) 51412115Sdyson bp->b_flags |= B_INVAL; 51512115Sdyson#endif 51612115Sdyson brelse(bp); 51712115Sdyson 51812115Sdysonloop: 51912115Sdyson for (vp = mountp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) { 52012115Sdyson nvp = vp->v_mntvnodes.le_next; 52112115Sdyson /* 52212115Sdyson * Step 4: invalidate all inactive vnodes. 52312115Sdyson */ 52412115Sdyson if (vp->v_usecount == 0) { 52512115Sdyson vgone(vp); 52612115Sdyson continue; 52712115Sdyson } 52812115Sdyson /* 52912115Sdyson * Step 5: invalidate all cached file data. 53012115Sdyson */ 53122521Sdyson if (vget(vp, LK_EXCLUSIVE, p)) 53212115Sdyson goto loop; 53312115Sdyson if (vinvalbuf(vp, 0, cred, p, 0, 0)) 53412115Sdyson panic("ext2_reload: dirty2"); 53512115Sdyson /* 53612115Sdyson * Step 6: re-read inode data for all active vnodes. 53712115Sdyson */ 53812115Sdyson ip = VTOI(vp); 53912115Sdyson if (error = 54012115Sdyson bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 54112115Sdyson (int)fs->s_blocksize, NOCRED, &bp)) { 54212115Sdyson vput(vp); 54312115Sdyson return (error); 54412115Sdyson } 54512115Sdyson ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data + 54612115Sdyson EXT2_INODE_SIZE * ino_to_fsbo(fs, ip->i_number)), 54712115Sdyson &ip->i_din); 54812115Sdyson brelse(bp); 54912115Sdyson vput(vp); 55012115Sdyson if (vp->v_mount != mountp) 55112115Sdyson goto loop; 55212115Sdyson } 55312115Sdyson return (0); 55412115Sdyson} 55512115Sdyson 55612115Sdyson/* 55712115Sdyson * Common code for mount and mountroot 55812115Sdyson */ 55912911Sphkstatic int 56012115Sdysonext2_mountfs(devvp, mp, p) 56112115Sdyson register struct vnode *devvp; 56212115Sdyson struct mount *mp; 56312115Sdyson struct proc *p; 56412115Sdyson{ 56512115Sdyson register struct ufsmount *ump; 56612115Sdyson struct buf *bp; 56712115Sdyson register struct ext2_sb_info *fs; 56812115Sdyson struct ext2_super_block * es; 56912115Sdyson dev_t dev = devvp->v_rdev; 57012115Sdyson struct partinfo dpart; 57112115Sdyson int havepart = 0; 57212115Sdyson int error, i, size; 57312115Sdyson int ronly; 57412115Sdyson#if !defined(__FreeBSD__) 57512115Sdyson extern struct vnode *rootvp; 57612115Sdyson#endif 57712115Sdyson 57812115Sdyson /* 57912115Sdyson * Disallow multiple mounts of the same device. 58012115Sdyson * Disallow mounting of a device that is currently in use 58112115Sdyson * (except for root, which might share swap device for miniroot). 58212115Sdyson * Flush out any old buffers remaining from a previous use. 58312115Sdyson */ 58412115Sdyson if (error = vfs_mountedon(devvp)) 58512115Sdyson return (error); 58612115Sdyson if (vcount(devvp) > 1 && devvp != rootvp) 58712115Sdyson return (EBUSY); 58812115Sdyson if (error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) 58912115Sdyson return (error); 59012115Sdyson#ifdef READONLY 59112115Sdyson/* turn on this to force it to be read-only */ 59212115Sdyson mp->mnt_flag |= MNT_RDONLY; 59312115Sdyson#endif 59412115Sdyson 59512115Sdyson ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 59612115Sdyson if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p)) 59712115Sdyson return (error); 59812115Sdyson if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0) 59912115Sdyson size = DEV_BSIZE; 60012115Sdyson else { 60112115Sdyson havepart = 1; 60212115Sdyson size = dpart.disklab->d_secsize; 60312115Sdyson } 60412115Sdyson 60512115Sdyson bp = NULL; 60612115Sdyson ump = NULL; 60712115Sdyson if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) 60812115Sdyson goto out; 60912115Sdyson es = (struct ext2_super_block *)bp->b_data; 61012115Sdyson if (es->s_magic != EXT2_SUPER_MAGIC) { 61112115Sdyson if(es->s_magic == EXT2_PRE_02B_MAGIC) 61212115Sdyson printf("This filesystem bears the magic number of a pre " 61312115Sdyson "0.2b version of ext2. This is not supported by " 61412115Sdyson "Lites.\n"); 61512115Sdyson else 61612115Sdyson printf("Wrong magic number: %x (expected %x for EXT2FS)\n", 61712115Sdyson es->s_magic, EXT2_SUPER_MAGIC); 61812115Sdyson error = EINVAL; /* XXX needs translation */ 61912115Sdyson goto out; 62012115Sdyson } 62112115Sdyson ump = bsd_malloc(sizeof *ump, M_UFSMNT, M_WAITOK); 62212115Sdyson bzero((caddr_t)ump, sizeof *ump); 62330280Sphk ump->um_malloctype = M_EXT2NODE; 62412115Sdyson /* I don't know whether this is the right strategy. Note that 62512115Sdyson we dynamically allocate both a ext2_sb_info and a ext2_super_block 62612115Sdyson while Linux keeps the super block in a locked buffer 62712115Sdyson */ 62812115Sdyson ump->um_e2fs = bsd_malloc(sizeof(struct ext2_sb_info), 62912115Sdyson M_UFSMNT, M_WAITOK); 63012115Sdyson ump->um_e2fs->s_es = bsd_malloc(sizeof(struct ext2_super_block), 63112115Sdyson M_UFSMNT, M_WAITOK); 63212115Sdyson bcopy(es, ump->um_e2fs->s_es, (u_int)sizeof(struct ext2_super_block)); 63312115Sdyson if(error = compute_sb_data(devvp, ump->um_e2fs->s_es, ump->um_e2fs)) { 63412115Sdyson brelse(bp); 63512115Sdyson return error; 63612115Sdyson } 63712115Sdyson brelse(bp); 63812115Sdyson bp = NULL; 63912115Sdyson fs = ump->um_e2fs; 64012115Sdyson fs->s_rd_only = ronly; /* ronly is set according to mnt_flags */ 64112115Sdyson if (!(fs->s_es->s_state & EXT2_VALID_FS)) { 64212115Sdyson printf("WARNING: %s was not properly dismounted\n", 64312115Sdyson fs->fs_fsmnt); 64412115Sdyson } 64512115Sdyson /* if the fs is not mounted read-only, make sure the super block is 64612115Sdyson always written back on a sync() 64712115Sdyson */ 64812115Sdyson if (ronly == 0) { 64912115Sdyson fs->s_dirt = 1; /* mark it modified */ 65012115Sdyson fs->s_es->s_state &= ~EXT2_VALID_FS; /* set fs invalid */ 65112115Sdyson } 65212115Sdyson mp->mnt_data = (qaddr_t)ump; 65312115Sdyson mp->mnt_stat.f_fsid.val[0] = (long)dev; 65412115Sdyson mp->mnt_stat.f_fsid.val[1] = MOUNT_EXT2FS; 65512115Sdyson mp->mnt_maxsymlinklen = EXT2_MAXSYMLINKLEN; 65612115Sdyson mp->mnt_flag |= MNT_LOCAL; 65712115Sdyson ump->um_mountp = mp; 65812115Sdyson ump->um_dev = dev; 65912115Sdyson ump->um_devvp = devvp; 66012115Sdyson /* setting those two parameters allows us to use 66112115Sdyson ufs_bmap w/o changse ! 66212115Sdyson */ 66312115Sdyson ump->um_nindir = EXT2_ADDR_PER_BLOCK(fs); 66412115Sdyson ump->um_bptrtodb = fs->s_es->s_log_block_size + 1; 66512115Sdyson ump->um_seqinc = EXT2_FRAGS_PER_BLOCK(fs); 66612115Sdyson for (i = 0; i < MAXQUOTAS; i++) 66712115Sdyson ump->um_quotas[i] = NULLVP; 66812115Sdyson devvp->v_specflags |= SI_MOUNTEDON; 66912115Sdyson if (ronly == 0) 67012115Sdyson ext2_sbupdate(ump, MNT_WAIT); 67112115Sdyson return (0); 67212115Sdysonout: 67312115Sdyson if (bp) 67412115Sdyson brelse(bp); 67512115Sdyson (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 67612115Sdyson if (ump) { 67712115Sdyson bsd_free(ump->um_fs, M_UFSMNT); 67812115Sdyson bsd_free(ump, M_UFSMNT); 67912115Sdyson mp->mnt_data = (qaddr_t)0; 68012115Sdyson } 68112115Sdyson return (error); 68212115Sdyson} 68312115Sdyson 68412115Sdyson/* 68512115Sdyson * unmount system call 68612115Sdyson */ 68712911Sphkstatic int 68812115Sdysonext2_unmount(mp, mntflags, p) 68912115Sdyson struct mount *mp; 69012115Sdyson int mntflags; 69112115Sdyson struct proc *p; 69212115Sdyson{ 69312115Sdyson register struct ufsmount *ump; 69412115Sdyson register struct ext2_sb_info *fs; 69512115Sdyson int error, flags, ronly, i; 69612115Sdyson 69712115Sdyson flags = 0; 69812115Sdyson if (mntflags & MNT_FORCE) { 69912115Sdyson if (mp->mnt_flag & MNT_ROOTFS) 70012115Sdyson return (EINVAL); 70112115Sdyson flags |= FORCECLOSE; 70212115Sdyson } 70312115Sdyson if (error = ext2_flushfiles(mp, flags, p)) 70412115Sdyson return (error); 70512115Sdyson ump = VFSTOUFS(mp); 70612115Sdyson fs = ump->um_e2fs; 70712115Sdyson ronly = fs->s_rd_only; 70812115Sdyson if (!ronly) { 70912115Sdyson fs->s_es->s_state |= EXT2_VALID_FS; /* was fs_clean = 1 */ 71012115Sdyson ext2_sbupdate(ump, MNT_WAIT); 71112115Sdyson } 71227881Sdyson 71312115Sdyson /* release buffers containing group descriptors */ 71412115Sdyson for(i = 0; i < fs->s_db_per_group; i++) 71527881Sdyson ULCK_BUF(fs->s_group_desc[i]) 71627881Sdyson 71712115Sdyson /* release cached inode/block bitmaps */ 71812115Sdyson for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) 71912115Sdyson if (fs->s_inode_bitmap[i]) 72027881Sdyson ULCK_BUF(fs->s_inode_bitmap[i]) 72127881Sdyson 72212115Sdyson for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) 72312115Sdyson if (fs->s_block_bitmap[i]) 72427881Sdyson ULCK_BUF(fs->s_block_bitmap[i]) 72512115Sdyson 72612115Sdyson ump->um_devvp->v_specflags &= ~SI_MOUNTEDON; 72712115Sdyson error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE, 72812115Sdyson NOCRED, p); 72912115Sdyson vrele(ump->um_devvp); 73012115Sdyson bsd_free(fs->s_es, M_UFSMNT); 73112115Sdyson bsd_free(fs, M_UFSMNT); 73212115Sdyson bsd_free(ump, M_UFSMNT); 73312115Sdyson mp->mnt_data = (qaddr_t)0; 73412115Sdyson mp->mnt_flag &= ~MNT_LOCAL; 73512115Sdyson return (error); 73612115Sdyson} 73712115Sdyson 73812115Sdyson/* 73912115Sdyson * Flush out all the files in a filesystem. 74012115Sdyson */ 74112911Sphkstatic int 74212115Sdysonext2_flushfiles(mp, flags, p) 74312115Sdyson register struct mount *mp; 74412115Sdyson int flags; 74512115Sdyson struct proc *p; 74612115Sdyson{ 74712115Sdyson register struct ufsmount *ump; 74812147Sdyson int error; 74912746Sbde#if QUOTA 75012746Sbde int i; 75112746Sbde#endif 75212115Sdyson 75312115Sdyson ump = VFSTOUFS(mp); 75412115Sdyson#if QUOTA 75512115Sdyson if (mp->mnt_flag & MNT_QUOTA) { 75612115Sdyson if (error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) 75712115Sdyson return (error); 75812115Sdyson for (i = 0; i < MAXQUOTAS; i++) { 75912115Sdyson if (ump->um_quotas[i] == NULLVP) 76012115Sdyson continue; 76112115Sdyson quotaoff(p, mp, i); 76212115Sdyson } 76312115Sdyson /* 76412115Sdyson * Here we fall through to vflush again to ensure 76512115Sdyson * that we have gotten rid of all the system vnodes. 76612115Sdyson */ 76712115Sdyson } 76812115Sdyson#endif 76912115Sdyson error = vflush(mp, NULLVP, flags); 77012115Sdyson return (error); 77112115Sdyson} 77212115Sdyson 77312115Sdyson/* 77412115Sdyson * Get file system statistics. 77512115Sdyson * taken from ext2/super.c ext2_statfs 77612115Sdyson */ 77712911Sphkstatic int 77812115Sdysonext2_statfs(mp, sbp, p) 77912115Sdyson struct mount *mp; 78012115Sdyson register struct statfs *sbp; 78112115Sdyson struct proc *p; 78212115Sdyson{ 78312115Sdyson unsigned long overhead; 78412115Sdyson unsigned long overhead_per_group; 78512115Sdyson 78612115Sdyson register struct ufsmount *ump; 78712115Sdyson register struct ext2_sb_info *fs; 78812115Sdyson register struct ext2_super_block *es; 78912115Sdyson 79012115Sdyson ump = VFSTOUFS(mp); 79112115Sdyson fs = ump->um_e2fs; 79212115Sdyson es = fs->s_es; 79312115Sdyson 79412115Sdyson if (es->s_magic != EXT2_SUPER_MAGIC) 79512115Sdyson panic("ext2_statfs - magic number spoiled"); 79612115Sdyson 79712115Sdyson /* 79812115Sdyson * Compute the overhead (FS structures) 79912115Sdyson */ 80012115Sdyson overhead_per_group = 1 /* super block */ + 80112115Sdyson fs->s_db_per_group + 80212115Sdyson 1 /* block bitmap */ + 80312115Sdyson 1 /* inode bitmap */ + 80412115Sdyson fs->s_itb_per_group; 80512115Sdyson overhead = es->s_first_data_block + 80612115Sdyson fs->s_groups_count * overhead_per_group; 80712115Sdyson 80812115Sdyson sbp->f_type = MOUNT_EXT2FS; 80912115Sdyson sbp->f_bsize = EXT2_FRAG_SIZE(fs); 81012115Sdyson sbp->f_iosize = EXT2_BLOCK_SIZE(fs); 81112115Sdyson sbp->f_blocks = es->s_blocks_count - overhead; 81212115Sdyson sbp->f_bfree = es->s_free_blocks_count; 81312115Sdyson sbp->f_bavail = sbp->f_bfree - es->s_r_blocks_count; 81412115Sdyson sbp->f_files = es->s_inodes_count; 81512115Sdyson sbp->f_ffree = es->s_free_inodes_count; 81612115Sdyson if (sbp != &mp->mnt_stat) { 81712115Sdyson bcopy((caddr_t)mp->mnt_stat.f_mntonname, 81812115Sdyson (caddr_t)&sbp->f_mntonname[0], MNAMELEN); 81912115Sdyson bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 82012115Sdyson (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 82112115Sdyson } 82212115Sdyson return (0); 82312115Sdyson} 82412115Sdyson 82512115Sdyson/* 82612115Sdyson * Go through the disk queues to initiate sandbagged IO; 82712115Sdyson * go through the inodes to write those that have been modified; 82812115Sdyson * initiate the writing of the super block if it has been modified. 82912115Sdyson * 83012115Sdyson * Note: we are always called with the filesystem marked `MPBUSY'. 83112115Sdyson */ 83212911Sphkstatic int 83312115Sdysonext2_sync(mp, waitfor, cred, p) 83412115Sdyson struct mount *mp; 83512115Sdyson int waitfor; 83612115Sdyson struct ucred *cred; 83712115Sdyson struct proc *p; 83812115Sdyson{ 83912115Sdyson register struct vnode *vp; 84012115Sdyson register struct inode *ip; 84112115Sdyson register struct ufsmount *ump = VFSTOUFS(mp); 84212115Sdyson register struct ext2_sb_info *fs; 84312115Sdyson int error, allerror = 0; 84412115Sdyson 84512115Sdyson fs = ump->um_e2fs; 84612115Sdyson /* 84712115Sdyson * Write back modified superblock. 84812115Sdyson * Consistency check that the superblock 84912115Sdyson * is still in the buffer cache. 85012115Sdyson */ 85112115Sdyson if (fs->s_dirt) { 85212115Sdyson#if !defined(__FreeBSD__) 85312115Sdyson struct timeval time; 85412115Sdyson#endif 85512115Sdyson 85612115Sdyson if (fs->s_rd_only != 0) { /* XXX */ 85712115Sdyson printf("fs = %s\n", fs->fs_fsmnt); 85812115Sdyson panic("update: rofs mod"); 85912115Sdyson } 86012115Sdyson fs->s_dirt = 0; 86112115Sdyson#if !defined(__FreeBSD__) 86212115Sdyson get_time(&time); 86312115Sdyson#endif 86412115Sdyson fs->s_es->s_wtime = time.tv_sec; 86512115Sdyson allerror = ext2_sbupdate(ump, waitfor); 86612115Sdyson } 86712115Sdyson /* 86812115Sdyson * Write back each (modified) inode. 86912115Sdyson */ 87012115Sdysonloop: 87112115Sdyson for (vp = mp->mnt_vnodelist.lh_first; 87212115Sdyson vp != NULL; 87312115Sdyson vp = vp->v_mntvnodes.le_next) { 87412115Sdyson /* 87512115Sdyson * If the vnode that we are about to sync is no longer 87612115Sdyson * associated with this mount point, start over. 87712115Sdyson */ 87812115Sdyson if (vp->v_mount != mp) 87912115Sdyson goto loop; 88012115Sdyson if (VOP_ISLOCKED(vp)) 88112115Sdyson continue; 88212115Sdyson ip = VTOI(vp); 88312115Sdyson if ((ip->i_flag & 88412115Sdyson (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 88512115Sdyson vp->v_dirtyblkhd.lh_first == NULL) 88612115Sdyson continue; 88722521Sdyson if (vget(vp, LK_EXCLUSIVE, p)) 88812115Sdyson goto loop; 88912115Sdyson if (error = VOP_FSYNC(vp, cred, waitfor, p)) 89012115Sdyson allerror = error; 89112115Sdyson vput(vp); 89212115Sdyson } 89312115Sdyson /* 89412115Sdyson * Force stale file system control information to be flushed. 89512115Sdyson */ 89612115Sdyson if (error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p)) 89712115Sdyson allerror = error; 89812115Sdyson#if QUOTA 89912115Sdyson qsync(mp); 90012115Sdyson#endif 90112115Sdyson return (allerror); 90212115Sdyson} 90312115Sdyson 90412115Sdyson/* 90512115Sdyson * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it 90612115Sdyson * in from disk. If it is in core, wait for the lock bit to clear, then 90712115Sdyson * return the inode locked. Detection and handling of mount points must be 90812115Sdyson * done by the calling routine. 90912115Sdyson */ 91012911Sphkstatic int 91112115Sdysonext2_vget(mp, ino, vpp) 91212115Sdyson struct mount *mp; 91312115Sdyson ino_t ino; 91412115Sdyson struct vnode **vpp; 91512115Sdyson{ 91612115Sdyson register struct ext2_sb_info *fs; 91712115Sdyson register struct inode *ip; 91812115Sdyson struct ufsmount *ump; 91912115Sdyson struct buf *bp; 92012115Sdyson struct vnode *vp; 92112115Sdyson dev_t dev; 92230280Sphk int i, error; 92312115Sdyson int used_blocks; 92412115Sdyson 92512115Sdyson ump = VFSTOUFS(mp); 92612115Sdyson dev = ump->um_dev; 92712406Sdysonrestart: 92812115Sdyson if ((*vpp = ufs_ihashget(dev, ino)) != NULL) 92912115Sdyson return (0); 93012115Sdyson 93112406Sdyson#ifdef __FreeBSD__ 93212406Sdyson /* 93312406Sdyson * Lock out the creation of new entries in the FFS hash table in 93412406Sdyson * case getnewvnode() or MALLOC() blocks, otherwise a duplicate 93512406Sdyson * may occur! 93612406Sdyson */ 93712406Sdyson if (ext2fs_inode_hash_lock) { 93812406Sdyson while (ext2fs_inode_hash_lock) { 93912406Sdyson ext2fs_inode_hash_lock = -1; 94012406Sdyson tsleep(&ext2fs_inode_hash_lock, PVM, "ffsvgt", 0); 94112406Sdyson } 94212406Sdyson goto restart; 94312406Sdyson } 94412406Sdyson ext2fs_inode_hash_lock = 1; 94512406Sdyson#endif 94612406Sdyson 94712115Sdyson /* Allocate a new vnode/inode. */ 94812115Sdyson if (error = getnewvnode(VT_UFS, mp, ext2_vnodeop_p, &vp)) { 94912115Sdyson *vpp = NULL; 95012115Sdyson return (error); 95112115Sdyson } 95230280Sphk MALLOC(ip, struct inode *, sizeof(struct inode), M_EXT2NODE, M_WAITOK); 95312406Sdyson#ifndef __FreeBSD__ 95412115Sdyson insmntque(vp, mp); 95512406Sdyson#endif 95612115Sdyson bzero((caddr_t)ip, sizeof(struct inode)); 95712115Sdyson vp->v_data = ip; 95812115Sdyson ip->i_vnode = vp; 95912115Sdyson ip->i_e2fs = fs = ump->um_e2fs; 96012115Sdyson ip->i_dev = dev; 96112115Sdyson ip->i_number = ino; 96212115Sdyson#if QUOTA 96312115Sdyson for (i = 0; i < MAXQUOTAS; i++) 96412115Sdyson ip->i_dquot[i] = NODQUOT; 96512115Sdyson#endif 96612115Sdyson /* 96712115Sdyson * Put it onto its hash chain and lock it so that other requests for 96812115Sdyson * this inode will block if they arrive while we are sleeping waiting 96912115Sdyson * for old data structures to be purged or for the contents of the 97012115Sdyson * disk portion of this inode to be read. 97112115Sdyson */ 97212115Sdyson ufs_ihashins(ip); 97312115Sdyson 97412406Sdyson#ifdef __FreeBSD__ 97512406Sdyson if (ext2fs_inode_hash_lock < 0) 97612406Sdyson wakeup(&ext2fs_inode_hash_lock); 97712406Sdyson ext2fs_inode_hash_lock = 0; 97812406Sdyson#endif 97912406Sdyson 98012115Sdyson /* Read in the disk contents for the inode, copy into the inode. */ 98112406Sdyson /* Read in the disk contents for the inode, copy into the inode. */ 98212115Sdyson#if 0 98312115Sdysonprintf("ext2_vget(%d) dbn= %d ", ino, fsbtodb(fs, ino_to_fsba(fs, ino))); 98412115Sdyson#endif 98512115Sdyson if (error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 98612115Sdyson (int)fs->s_blocksize, NOCRED, &bp)) { 98712115Sdyson /* 98812115Sdyson * The inode does not contain anything useful, so it would 98912115Sdyson * be misleading to leave it on its hash chain. With mode 99012115Sdyson * still zero, it will be unlinked and returned to the free 99112115Sdyson * list by vput(). 99212115Sdyson */ 99312115Sdyson vput(vp); 99412115Sdyson brelse(bp); 99512115Sdyson *vpp = NULL; 99612115Sdyson return (error); 99712115Sdyson } 99812115Sdyson /* convert ext2 inode to dinode */ 99912115Sdyson ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data + EXT2_INODE_SIZE * 100012115Sdyson ino_to_fsbo(fs, ino)), &ip->i_din); 100112115Sdyson ip->i_block_group = ino_to_cg(fs, ino); 100212115Sdyson ip->i_next_alloc_block = 0; 100312115Sdyson ip->i_next_alloc_goal = 0; 100412115Sdyson ip->i_prealloc_count = 0; 100512115Sdyson ip->i_prealloc_block = 0; 100612115Sdyson /* now we want to make sure that block pointers for unused 100712115Sdyson blocks are zeroed out - ext2_balloc depends on this 100812115Sdyson although for regular files and directories only 100912115Sdyson */ 101012115Sdyson if(S_ISDIR(ip->i_mode) || S_ISREG(ip->i_mode)) { 101112115Sdyson used_blocks = (ip->i_size+fs->s_blocksize-1) / fs->s_blocksize; 101212115Sdyson for(i = used_blocks; i < EXT2_NDIR_BLOCKS; i++) 101312115Sdyson ip->i_db[i] = 0; 101412115Sdyson } 101512115Sdyson/* 101612115Sdyson ext2_print_inode(ip); 101712115Sdyson*/ 101812115Sdyson brelse(bp); 101912115Sdyson 102012115Sdyson /* 102112115Sdyson * Initialize the vnode from the inode, check for aliases. 102212115Sdyson * Note that the underlying vnode may have changed. 102312115Sdyson */ 102414249Sbde if (error = ufs_vinit(mp, ext2_specop_p, ext2_fifoop_p, &vp)) { 102512115Sdyson vput(vp); 102612115Sdyson *vpp = NULL; 102712115Sdyson return (error); 102812115Sdyson } 102912115Sdyson /* 103012115Sdyson * Finish inode initialization now that aliasing has been resolved. 103112115Sdyson */ 103212115Sdyson ip->i_devvp = ump->um_devvp; 103312115Sdyson VREF(ip->i_devvp); 103412115Sdyson /* 103512115Sdyson * Set up a generation number for this inode if it does not 103612115Sdyson * already have one. This should only happen on old filesystems. 103712115Sdyson */ 103812115Sdyson if (ip->i_gen == 0) { 103912115Sdyson#if !defined(__FreeBSD__) 104012115Sdyson struct timeval time; 104112115Sdyson get_time(&time); 104212115Sdyson#endif 104312115Sdyson if (++nextgennumber < (u_long)time.tv_sec) 104412115Sdyson nextgennumber = time.tv_sec; 104512115Sdyson ip->i_gen = nextgennumber; 104612115Sdyson if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 104712115Sdyson ip->i_flag |= IN_MODIFIED; 104812115Sdyson } 104912115Sdyson *vpp = vp; 105012115Sdyson return (0); 105112115Sdyson} 105212115Sdyson 105312115Sdyson/* 105412115Sdyson * File handle to vnode 105512115Sdyson * 105612115Sdyson * Have to be really careful about stale file handles: 105712115Sdyson * - check that the inode number is valid 105812115Sdyson * - call ext2_vget() to get the locked inode 105912115Sdyson * - check for an unallocated inode (i_mode == 0) 106012115Sdyson * - check that the given client host has export rights and return 106112115Sdyson * those rights via. exflagsp and credanonp 106212115Sdyson */ 106312911Sphkstatic int 106412115Sdysonext2_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 106512115Sdyson register struct mount *mp; 106612115Sdyson struct fid *fhp; 106728270Swollman struct sockaddr *nam; 106812115Sdyson struct vnode **vpp; 106912115Sdyson int *exflagsp; 107012115Sdyson struct ucred **credanonp; 107112115Sdyson{ 107212115Sdyson register struct ufid *ufhp; 107312115Sdyson struct ext2_sb_info *fs; 107412115Sdyson 107512115Sdyson ufhp = (struct ufid *)fhp; 107612115Sdyson fs = VFSTOUFS(mp)->um_e2fs; 107712115Sdyson if (ufhp->ufid_ino < ROOTINO || 107812115Sdyson ufhp->ufid_ino >= fs->s_groups_count * fs->s_es->s_inodes_per_group) 107912115Sdyson return (ESTALE); 108012115Sdyson return (ufs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp)); 108112115Sdyson} 108212115Sdyson 108312115Sdyson/* 108412115Sdyson * Vnode pointer to File handle 108512115Sdyson */ 108612115Sdyson/* ARGSUSED */ 108712911Sphkstatic int 108812115Sdysonext2_vptofh(vp, fhp) 108912115Sdyson struct vnode *vp; 109012115Sdyson struct fid *fhp; 109112115Sdyson{ 109212115Sdyson register struct inode *ip; 109312115Sdyson register struct ufid *ufhp; 109412115Sdyson 109512115Sdyson ip = VTOI(vp); 109612115Sdyson ufhp = (struct ufid *)fhp; 109712115Sdyson ufhp->ufid_len = sizeof(struct ufid); 109812115Sdyson ufhp->ufid_ino = ip->i_number; 109912115Sdyson ufhp->ufid_gen = ip->i_gen; 110012115Sdyson return (0); 110112115Sdyson} 110212115Sdyson 110312115Sdyson/* 110412115Sdyson * Write a superblock and associated information back to disk. 110512115Sdyson */ 110612911Sphkstatic int 110712115Sdysonext2_sbupdate(mp, waitfor) 110812115Sdyson struct ufsmount *mp; 110912115Sdyson int waitfor; 111012115Sdyson{ 111112115Sdyson register struct ext2_sb_info *fs = mp->um_e2fs; 111212115Sdyson register struct ext2_super_block *es = fs->s_es; 111312115Sdyson register struct buf *bp; 111412147Sdyson int i, error = 0; 111512115Sdyson/* 111612115Sdysonprintf("\nupdating superblock, waitfor=%s\n", waitfor == MNT_WAIT ? "yes":"no"); 111712115Sdyson*/ 111812115Sdyson bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0); 111912115Sdyson bcopy((caddr_t)es, bp->b_data, (u_int)sizeof(struct ext2_super_block)); 112012115Sdyson if (waitfor == MNT_WAIT) 112112115Sdyson error = bwrite(bp); 112212115Sdyson else 112312115Sdyson bawrite(bp); 112412115Sdyson 112527881Sdyson /* 112627881Sdyson * The buffers for group descriptors, inode bitmaps and block bitmaps 112727881Sdyson * are not busy at this point and are (hopefully) written by the 112827881Sdyson * usual sync mechanism. No need to write them here 112912115Sdyson */ 113012115Sdyson 113112115Sdyson return (error); 113212115Sdyson} 1133