ext2_vfsops.c revision 29906
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 8912911Sphkstatic struct vfsops ext2fs_vfsops = { 9012115Sdyson ext2_mount, 9112115Sdyson ufs_start, /* empty function */ 9212115Sdyson ext2_unmount, 9312115Sdyson ufs_root, /* root inode via vget */ 9412115Sdyson ufs_quotactl, /* does operations associated with quotas */ 9512115Sdyson ext2_statfs, 9612115Sdyson ext2_sync, 9712115Sdyson ext2_vget, 9812115Sdyson ext2_fhtovp, 9912115Sdyson ext2_vptofh, 10012115Sdyson ext2_init, 10112115Sdyson}; 10212115Sdyson 10312115Sdyson#if defined(__FreeBSD__) 10412115SdysonVFS_SET(ext2fs_vfsops, ext2fs, MOUNT_EXT2FS, 0); 10512115Sdyson#define bsd_malloc malloc 10612115Sdyson#define bsd_free free 10712115Sdyson#endif 10812115Sdyson 10912115Sdysonextern u_long nextgennumber; 11012406Sdyson#ifdef __FreeBSD__ 11112911Sphkstatic int ext2fs_inode_hash_lock; 11212406Sdyson#endif 11312115Sdyson 11416322Sgpalmerstatic int compute_sb_data __P((struct vnode * devvp, 11516322Sgpalmer struct ext2_super_block * es, 11616322Sgpalmer struct ext2_sb_info * fs)); 11716322Sgpalmer 11816322Sgpalmer#ifdef notyet 11916322Sgpalmerstatic int ext2_mountroot __P((void)); 12016322Sgpalmer 12112115Sdyson/* 12216322Sgpalmer * Called by main() when ext2fs is going to be mounted as root. 12312115Sdyson * 12412115Sdyson * Name is updated by mount(8) after booting. 12512115Sdyson */ 12612115Sdyson#define ROOTNAME "root_device" 12712115Sdyson 12812911Sphkstatic int 12912115Sdysonext2_mountroot() 13012115Sdyson{ 13112115Sdyson#if !defined(__FreeBSD__) 13212115Sdyson extern struct vnode *rootvp; 13312115Sdyson#endif 13412115Sdyson register struct ext2_sb_info *fs; 13512115Sdyson register struct mount *mp; 13612115Sdyson#if defined(__FreeBSD__) 13712115Sdyson struct proc *p = curproc; 13812115Sdyson#else 13912115Sdyson struct proc *p = get_proc(); /* XXX */ 14012115Sdyson#endif 14112115Sdyson struct ufsmount *ump; 14212115Sdyson u_int size; 14312115Sdyson int error; 14412115Sdyson 14529208Sbde if ((error = bdevvp(rootdev, &rootvp))) { 14629208Sbde printf("ext2_mountroot: can't find rootvp"); 14729208Sbde return (error); 14829208Sbde } 14912115Sdyson mp = bsd_malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK); 15012115Sdyson bzero((char *)mp, (u_long)sizeof(struct mount)); 15112115Sdyson mp->mnt_op = &ext2fs_vfsops; 15212115Sdyson mp->mnt_flag = MNT_RDONLY; 15329888Skato if (bdevsw[major(rootdev)]->d_flags & D_NOCLUSTERR) 15429888Skato mp->mnt_flag |= MNT_NOCLUSTERR; 15529888Skato if (bdevsw[major(rootdev)]->d_flags & D_NOCLUSTERW) 15629888Skato mp->mnt_flag |= MNT_NOCLUSTERW; 15712115Sdyson if (error = ext2_mountfs(rootvp, mp, p)) { 15812115Sdyson bsd_free(mp, M_MOUNT); 15912115Sdyson return (error); 16012115Sdyson } 16112115Sdyson if (error = vfs_lock(mp)) { 16212115Sdyson (void)ext2_unmount(mp, 0, p); 16312115Sdyson bsd_free(mp, M_MOUNT); 16412115Sdyson return (error); 16512115Sdyson } 16612115Sdyson#if defined(__FreeBSD__) 16712115Sdyson CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 16812115Sdyson#else 16912115Sdyson TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list); 17012115Sdyson#endif 17112115Sdyson mp->mnt_flag |= MNT_ROOTFS; 17212115Sdyson mp->mnt_vnodecovered = NULLVP; 17312115Sdyson ump = VFSTOUFS(mp); 17412115Sdyson fs = ump->um_e2fs; 17512115Sdyson bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt)); 17612115Sdyson fs->fs_fsmnt[0] = '/'; 17712115Sdyson bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, 17812115Sdyson MNAMELEN); 17912115Sdyson (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 18012115Sdyson &size); 18112115Sdyson bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 18212115Sdyson (void)ext2_statfs(mp, &mp->mnt_stat, p); 18312115Sdyson vfs_unlock(mp); 18412115Sdyson inittodr(fs->s_es->s_wtime); /* this helps to set the time */ 18512115Sdyson return (0); 18612115Sdyson} 18716322Sgpalmer#endif 18812115Sdyson 18912115Sdyson/* 19012115Sdyson * VFS Operations. 19112115Sdyson * 19212115Sdyson * mount system call 19312115Sdyson */ 19412911Sphkstatic int 19512115Sdysonext2_mount(mp, path, data, ndp, p) 19612115Sdyson register struct mount *mp; 19712115Sdyson char *path; 19812115Sdyson caddr_t data; /* this is actually a (struct ufs_args *) */ 19912115Sdyson struct nameidata *ndp; 20012115Sdyson struct proc *p; 20112115Sdyson{ 20212115Sdyson struct vnode *devvp; 20312115Sdyson struct ufs_args args; 20412115Sdyson struct ufsmount *ump = 0; 20512115Sdyson register struct ext2_sb_info *fs; 20612115Sdyson u_int size; 20712115Sdyson int error, flags; 20812115Sdyson 20912115Sdyson if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) 21012115Sdyson return (error); 21112115Sdyson /* 21212115Sdyson * If updating, check whether changing from read-only to 21312115Sdyson * read/write; if there is no device name, that's all we do. 21429888Skato * Disallow clearing MNT_NOCLUSTERR and MNT_NOCLUSTERW flags, 21529888Skato * if block device requests. 21612115Sdyson */ 21712115Sdyson if (mp->mnt_flag & MNT_UPDATE) { 21812115Sdyson ump = VFSTOUFS(mp); 21912115Sdyson fs = ump->um_e2fs; 22012115Sdyson error = 0; 22129888Skato if (bdevsw[major(ump->um_dev)]->d_flags & D_NOCLUSTERR) 22229888Skato mp->mnt_flag |= MNT_NOCLUSTERR; 22329888Skato if (bdevsw[major(ump->um_dev)]->d_flags & D_NOCLUSTERW) 22429888Skato mp->mnt_flag |= MNT_NOCLUSTERW; 22512115Sdyson if (fs->s_rd_only == 0 && (mp->mnt_flag & MNT_RDONLY)) { 22612115Sdyson flags = WRITECLOSE; 22712115Sdyson if (mp->mnt_flag & MNT_FORCE) 22812115Sdyson flags |= FORCECLOSE; 22922521Sdyson if (vfs_busy(mp, LK_NOWAIT, 0, p)) 23012115Sdyson return (EBUSY); 23112115Sdyson error = ext2_flushfiles(mp, flags, p); 23222521Sdyson vfs_unbusy(mp, p); 23312115Sdyson } 23412115Sdyson if (!error && (mp->mnt_flag & MNT_RELOAD)) 23512115Sdyson error = ext2_reload(mp, ndp->ni_cnd.cn_cred, p); 23612115Sdyson if (error) 23712115Sdyson return (error); 23812115Sdyson if (fs->s_rd_only && (mp->mnt_flag & MNT_WANTRDWR)) 23912115Sdyson fs->s_rd_only = 0; 24012115Sdyson if (fs->s_rd_only == 0) { 24112115Sdyson /* don't say it's clean */ 24212115Sdyson fs->s_es->s_state &= ~EXT2_VALID_FS; 24312115Sdyson ext2_sbupdate(ump, MNT_WAIT); 24412115Sdyson } 24512115Sdyson if (args.fspec == 0) { 24612115Sdyson /* 24712115Sdyson * Process export requests. 24812115Sdyson */ 24912115Sdyson return (vfs_export(mp, &ump->um_export, &args.export)); 25012115Sdyson } 25112115Sdyson } 25212115Sdyson /* 25312115Sdyson * Not an update, or updating the name: look up the name 25412115Sdyson * and verify that it refers to a sensible block device. 25512115Sdyson */ 25612115Sdyson NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 25712115Sdyson if (error = namei(ndp)) 25812115Sdyson return (error); 25912115Sdyson devvp = ndp->ni_vp; 26012115Sdyson 26112115Sdyson if (devvp->v_type != VBLK) { 26212115Sdyson vrele(devvp); 26312115Sdyson return (ENOTBLK); 26412115Sdyson } 26512115Sdyson if (major(devvp->v_rdev) >= nblkdev) { 26612115Sdyson vrele(devvp); 26712115Sdyson return (ENXIO); 26812115Sdyson } 26929888Skato if ((mp->mnt_flag & MNT_UPDATE) == 0) { 27029888Skato if (bdevsw[major(devvp->v_rdev)]->d_flags & D_NOCLUSTERR) 27129888Skato mp->mnt_flag |= MNT_NOCLUSTERR; 27229888Skato if (bdevsw[major(devvp->v_rdev)]->d_flags & D_NOCLUSTERW) 27329888Skato mp->mnt_flag |= MNT_NOCLUSTERW; 27412115Sdyson error = ext2_mountfs(devvp, mp, p); 27529888Skato } else { 27612115Sdyson if (devvp != ump->um_devvp) 27712115Sdyson error = EINVAL; /* needs translation */ 27812115Sdyson else 27912115Sdyson vrele(devvp); 28012115Sdyson } 28112115Sdyson if (error) { 28212115Sdyson vrele(devvp); 28312115Sdyson return (error); 28412115Sdyson } 28512115Sdyson ump = VFSTOUFS(mp); 28612115Sdyson fs = ump->um_e2fs; 28712115Sdyson (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size); 28812115Sdyson bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size); 28912115Sdyson bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, 29012115Sdyson MNAMELEN); 29112115Sdyson (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 29212115Sdyson &size); 29312115Sdyson bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 29412115Sdyson (void)ext2_statfs(mp, &mp->mnt_stat, p); 29512115Sdyson return (0); 29612115Sdyson} 29712115Sdyson 29812115Sdyson/* 29912115Sdyson * checks that the data in the descriptor blocks make sense 30012115Sdyson * this is taken from ext2/super.c 30112115Sdyson */ 30212115Sdysonstatic int ext2_check_descriptors (struct ext2_sb_info * sb) 30312115Sdyson{ 30412115Sdyson int i; 30512115Sdyson int desc_block = 0; 30612115Sdyson unsigned long block = sb->s_es->s_first_data_block; 30712115Sdyson struct ext2_group_desc * gdp = NULL; 30812115Sdyson 30912115Sdyson /* ext2_debug ("Checking group descriptors"); */ 31012115Sdyson 31112115Sdyson for (i = 0; i < sb->s_groups_count; i++) 31212115Sdyson { 31312115Sdyson /* examine next descriptor block */ 31412115Sdyson if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0) 31512115Sdyson gdp = (struct ext2_group_desc *) 31612115Sdyson sb->s_group_desc[desc_block++]->b_data; 31712115Sdyson if (gdp->bg_block_bitmap < block || 31812115Sdyson gdp->bg_block_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb)) 31912115Sdyson { 32012115Sdyson printf ("ext2_check_descriptors: " 32112115Sdyson "Block bitmap for group %d" 32212115Sdyson " not in group (block %lu)!", 32312115Sdyson i, (unsigned long) gdp->bg_block_bitmap); 32412115Sdyson return 0; 32512115Sdyson } 32612115Sdyson if (gdp->bg_inode_bitmap < block || 32712115Sdyson gdp->bg_inode_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb)) 32812115Sdyson { 32912115Sdyson printf ("ext2_check_descriptors: " 33012115Sdyson "Inode bitmap for group %d" 33112115Sdyson " not in group (block %lu)!", 33212115Sdyson i, (unsigned long) gdp->bg_inode_bitmap); 33312115Sdyson return 0; 33412115Sdyson } 33512115Sdyson if (gdp->bg_inode_table < block || 33612115Sdyson gdp->bg_inode_table + sb->s_itb_per_group >= 33712115Sdyson block + EXT2_BLOCKS_PER_GROUP(sb)) 33812115Sdyson { 33912115Sdyson printf ("ext2_check_descriptors: " 34012115Sdyson "Inode table for group %d" 34112115Sdyson " not in group (block %lu)!", 34212115Sdyson i, (unsigned long) gdp->bg_inode_table); 34312115Sdyson return 0; 34412115Sdyson } 34512115Sdyson block += EXT2_BLOCKS_PER_GROUP(sb); 34612115Sdyson gdp++; 34712115Sdyson } 34812115Sdyson return 1; 34912115Sdyson} 35012115Sdyson 35112115Sdyson/* 35212115Sdyson * this computes the fields of the ext2_sb_info structure from the 35312115Sdyson * data in the ext2_super_block structure read in 35412115Sdyson */ 35512115Sdysonstatic int compute_sb_data(devvp, es, fs) 35612115Sdyson struct vnode * devvp; 35712115Sdyson struct ext2_super_block * es; 35812115Sdyson struct ext2_sb_info * fs; 35912115Sdyson{ 36012115Sdyson int db_count, error; 36112115Sdyson int i, j; 36212115Sdyson int logic_sb_block = 1; /* XXX for now */ 36312115Sdyson 36412115Sdyson#if 1 36512115Sdyson#define V(v) 36612115Sdyson#else 36712115Sdyson#define V(v) printf(#v"= %d\n", fs->v); 36812115Sdyson#endif 36912115Sdyson 37012115Sdyson fs->s_blocksize = EXT2_MIN_BLOCK_SIZE << es->s_log_block_size; 37112115Sdyson V(s_blocksize) 37212115Sdyson fs->s_bshift = EXT2_MIN_BLOCK_LOG_SIZE + es->s_log_block_size; 37312115Sdyson V(s_bshift) 37412115Sdyson fs->s_fsbtodb = es->s_log_block_size + 1; 37512115Sdyson V(s_fsbtodb) 37612115Sdyson fs->s_qbmask = fs->s_blocksize - 1; 37712115Sdyson V(s_bmask) 37812115Sdyson fs->s_blocksize_bits = EXT2_BLOCK_SIZE_BITS(es); 37912115Sdyson V(s_blocksize_bits) 38012115Sdyson fs->s_frag_size = EXT2_MIN_FRAG_SIZE << es->s_log_frag_size; 38112115Sdyson V(s_frag_size) 38212115Sdyson if (fs->s_frag_size) 38312115Sdyson fs->s_frags_per_block = fs->s_blocksize / fs->s_frag_size; 38412115Sdyson V(s_frags_per_block) 38512115Sdyson fs->s_blocks_per_group = es->s_blocks_per_group; 38612115Sdyson V(s_blocks_per_group) 38712115Sdyson fs->s_frags_per_group = es->s_frags_per_group; 38812115Sdyson V(s_frags_per_group) 38912115Sdyson fs->s_inodes_per_group = es->s_inodes_per_group; 39012115Sdyson V(s_inodes_per_group) 39112115Sdyson fs->s_inodes_per_block = fs->s_blocksize / EXT2_INODE_SIZE; 39212115Sdyson V(s_inodes_per_block) 39312115Sdyson fs->s_itb_per_group = fs->s_inodes_per_group /fs->s_inodes_per_block; 39412115Sdyson V(s_itb_per_group) 39512115Sdyson fs->s_desc_per_block = fs->s_blocksize / sizeof (struct ext2_group_desc); 39612115Sdyson V(s_desc_per_block) 39712115Sdyson /* s_resuid / s_resgid ? */ 39812115Sdyson fs->s_groups_count = (es->s_blocks_count - 39912115Sdyson es->s_first_data_block + 40012115Sdyson EXT2_BLOCKS_PER_GROUP(fs) - 1) / 40112115Sdyson EXT2_BLOCKS_PER_GROUP(fs); 40212115Sdyson V(s_groups_count) 40312115Sdyson db_count = (fs->s_groups_count + EXT2_DESC_PER_BLOCK(fs) - 1) / 40412115Sdyson EXT2_DESC_PER_BLOCK(fs); 40512115Sdyson fs->s_db_per_group = db_count; 40612115Sdyson V(s_db_per_group) 40712115Sdyson 40812115Sdyson fs->s_group_desc = bsd_malloc(db_count * sizeof (struct buf *), 40912115Sdyson M_UFSMNT, M_WAITOK); 41012115Sdyson 41112115Sdyson /* adjust logic_sb_block */ 41212115Sdyson if(fs->s_blocksize > SBSIZE) 41312115Sdyson /* Godmar thinks: if the blocksize is greater than 1024, then 41412115Sdyson the superblock is logically part of block zero. 41512115Sdyson */ 41612115Sdyson logic_sb_block = 0; 41712115Sdyson 41812115Sdyson for (i = 0; i < db_count; i++) { 41912115Sdyson error = bread(devvp , fsbtodb(fs, logic_sb_block + i + 1), 42012115Sdyson fs->s_blocksize, NOCRED, &fs->s_group_desc[i]); 42112115Sdyson if(error) { 42212115Sdyson for (j = 0; j < i; j++) 42312115Sdyson brelse(fs->s_group_desc[j]); 42412115Sdyson bsd_free(fs->s_group_desc, M_UFSMNT); 42512115Sdyson printf("EXT2-fs: unable to read group descriptors (%d)\n", error); 42612115Sdyson return EIO; 42712115Sdyson } 42827881Sdyson /* Set the B_LOCKED flag on the buffer, then brelse() it */ 42927881Sdyson LCK_BUF(fs->s_group_desc[i]) 43012115Sdyson } 43112115Sdyson if(!ext2_check_descriptors(fs)) { 43212115Sdyson for (j = 0; j < db_count; j++) 43327881Sdyson ULCK_BUF(fs->s_group_desc[j]) 43412115Sdyson bsd_free(fs->s_group_desc, M_UFSMNT); 43512115Sdyson printf("EXT2-fs: (ext2_check_descriptors failure) " 43612115Sdyson "unable to read group descriptors\n"); 43712115Sdyson return EIO; 43812115Sdyson } 43912115Sdyson 44012115Sdyson for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) { 44112115Sdyson fs->s_inode_bitmap_number[i] = 0; 44212115Sdyson fs->s_inode_bitmap[i] = NULL; 44312115Sdyson fs->s_block_bitmap_number[i] = 0; 44412115Sdyson fs->s_block_bitmap[i] = NULL; 44512115Sdyson } 44612115Sdyson fs->s_loaded_inode_bitmaps = 0; 44712115Sdyson fs->s_loaded_block_bitmaps = 0; 44812115Sdyson return 0; 44912115Sdyson} 45012115Sdyson 45112115Sdyson/* 45212115Sdyson * Reload all incore data for a filesystem (used after running fsck on 45312115Sdyson * the root filesystem and finding things to fix). The filesystem must 45412115Sdyson * be mounted read-only. 45512115Sdyson * 45612115Sdyson * Things to do to update the mount: 45712115Sdyson * 1) invalidate all cached meta-data. 45812115Sdyson * 2) re-read superblock from disk. 45912115Sdyson * 3) re-read summary information from disk. 46012115Sdyson * 4) invalidate all inactive vnodes. 46112115Sdyson * 5) invalidate all cached file data. 46212115Sdyson * 6) re-read inode data for all active vnodes. 46312115Sdyson */ 46412911Sphkstatic int 46512115Sdysonext2_reload(mountp, cred, p) 46612115Sdyson register struct mount *mountp; 46712115Sdyson struct ucred *cred; 46812115Sdyson struct proc *p; 46912115Sdyson{ 47012115Sdyson register struct vnode *vp, *nvp, *devvp; 47112115Sdyson struct inode *ip; 47212115Sdyson struct buf *bp; 47312115Sdyson struct ext2_super_block * es; 47412115Sdyson struct ext2_sb_info *fs; 47512147Sdyson int error; 47612115Sdyson 47712115Sdyson if ((mountp->mnt_flag & MNT_RDONLY) == 0) 47812115Sdyson return (EINVAL); 47912115Sdyson /* 48012115Sdyson * Step 1: invalidate all cached meta-data. 48112115Sdyson */ 48212115Sdyson devvp = VFSTOUFS(mountp)->um_devvp; 48312115Sdyson if (vinvalbuf(devvp, 0, cred, p, 0, 0)) 48412115Sdyson panic("ext2_reload: dirty1"); 48512115Sdyson /* 48612115Sdyson * Step 2: re-read superblock from disk. 48712115Sdyson * constants have been adjusted for ext2 48812115Sdyson */ 48912115Sdyson if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) 49012115Sdyson return (error); 49112115Sdyson es = (struct ext2_super_block *)bp->b_data; 49212115Sdyson if (es->s_magic != EXT2_SUPER_MAGIC) { 49312115Sdyson if(es->s_magic == EXT2_PRE_02B_MAGIC) 49412115Sdyson printf("This filesystem bears the magic number of a pre " 49512115Sdyson "0.2b version of ext2. This is not supported by " 49612115Sdyson "Lites.\n"); 49712115Sdyson else 49812115Sdyson printf("Wrong magic number: %x (expected %x for ext2 fs\n", 49912115Sdyson es->s_magic, EXT2_SUPER_MAGIC); 50012115Sdyson brelse(bp); 50112115Sdyson return (EIO); /* XXX needs translation */ 50212115Sdyson } 50312115Sdyson fs = VFSTOUFS(mountp)->um_e2fs; 50412115Sdyson bcopy(bp->b_data, fs->s_es, sizeof(struct ext2_super_block)); 50512115Sdyson 50612115Sdyson if(error = compute_sb_data(devvp, es, fs)) { 50712115Sdyson brelse(bp); 50812115Sdyson return error; 50912115Sdyson } 51012115Sdyson#ifdef UNKLAR 51112115Sdyson if (fs->fs_sbsize < SBSIZE) 51212115Sdyson bp->b_flags |= B_INVAL; 51312115Sdyson#endif 51412115Sdyson brelse(bp); 51512115Sdyson 51612115Sdysonloop: 51712115Sdyson for (vp = mountp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) { 51812115Sdyson nvp = vp->v_mntvnodes.le_next; 51912115Sdyson /* 52012115Sdyson * Step 4: invalidate all inactive vnodes. 52112115Sdyson */ 52212115Sdyson if (vp->v_usecount == 0) { 52312115Sdyson vgone(vp); 52412115Sdyson continue; 52512115Sdyson } 52612115Sdyson /* 52712115Sdyson * Step 5: invalidate all cached file data. 52812115Sdyson */ 52922521Sdyson if (vget(vp, LK_EXCLUSIVE, p)) 53012115Sdyson goto loop; 53112115Sdyson if (vinvalbuf(vp, 0, cred, p, 0, 0)) 53212115Sdyson panic("ext2_reload: dirty2"); 53312115Sdyson /* 53412115Sdyson * Step 6: re-read inode data for all active vnodes. 53512115Sdyson */ 53612115Sdyson ip = VTOI(vp); 53712115Sdyson if (error = 53812115Sdyson bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 53912115Sdyson (int)fs->s_blocksize, NOCRED, &bp)) { 54012115Sdyson vput(vp); 54112115Sdyson return (error); 54212115Sdyson } 54312115Sdyson ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data + 54412115Sdyson EXT2_INODE_SIZE * ino_to_fsbo(fs, ip->i_number)), 54512115Sdyson &ip->i_din); 54612115Sdyson brelse(bp); 54712115Sdyson vput(vp); 54812115Sdyson if (vp->v_mount != mountp) 54912115Sdyson goto loop; 55012115Sdyson } 55112115Sdyson return (0); 55212115Sdyson} 55312115Sdyson 55412115Sdyson/* 55512115Sdyson * Common code for mount and mountroot 55612115Sdyson */ 55712911Sphkstatic int 55812115Sdysonext2_mountfs(devvp, mp, p) 55912115Sdyson register struct vnode *devvp; 56012115Sdyson struct mount *mp; 56112115Sdyson struct proc *p; 56212115Sdyson{ 56312115Sdyson register struct ufsmount *ump; 56412115Sdyson struct buf *bp; 56512115Sdyson register struct ext2_sb_info *fs; 56612115Sdyson struct ext2_super_block * es; 56712115Sdyson dev_t dev = devvp->v_rdev; 56812115Sdyson struct partinfo dpart; 56912115Sdyson int havepart = 0; 57012115Sdyson int error, i, size; 57112115Sdyson int ronly; 57212115Sdyson#if !defined(__FreeBSD__) 57312115Sdyson extern struct vnode *rootvp; 57412115Sdyson#endif 57512115Sdyson 57612115Sdyson /* 57712115Sdyson * Disallow multiple mounts of the same device. 57812115Sdyson * Disallow mounting of a device that is currently in use 57912115Sdyson * (except for root, which might share swap device for miniroot). 58012115Sdyson * Flush out any old buffers remaining from a previous use. 58112115Sdyson */ 58212115Sdyson if (error = vfs_mountedon(devvp)) 58312115Sdyson return (error); 58412115Sdyson if (vcount(devvp) > 1 && devvp != rootvp) 58512115Sdyson return (EBUSY); 58612115Sdyson if (error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) 58712115Sdyson return (error); 58812115Sdyson#ifdef READONLY 58912115Sdyson/* turn on this to force it to be read-only */ 59012115Sdyson mp->mnt_flag |= MNT_RDONLY; 59112115Sdyson#endif 59212115Sdyson 59312115Sdyson ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 59412115Sdyson if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p)) 59512115Sdyson return (error); 59612115Sdyson if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0) 59712115Sdyson size = DEV_BSIZE; 59812115Sdyson else { 59912115Sdyson havepart = 1; 60012115Sdyson size = dpart.disklab->d_secsize; 60112115Sdyson } 60212115Sdyson 60312115Sdyson bp = NULL; 60412115Sdyson ump = NULL; 60512115Sdyson if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) 60612115Sdyson goto out; 60712115Sdyson es = (struct ext2_super_block *)bp->b_data; 60812115Sdyson if (es->s_magic != EXT2_SUPER_MAGIC) { 60912115Sdyson if(es->s_magic == EXT2_PRE_02B_MAGIC) 61012115Sdyson printf("This filesystem bears the magic number of a pre " 61112115Sdyson "0.2b version of ext2. This is not supported by " 61212115Sdyson "Lites.\n"); 61312115Sdyson else 61412115Sdyson printf("Wrong magic number: %x (expected %x for EXT2FS)\n", 61512115Sdyson es->s_magic, EXT2_SUPER_MAGIC); 61612115Sdyson error = EINVAL; /* XXX needs translation */ 61712115Sdyson goto out; 61812115Sdyson } 61912115Sdyson ump = bsd_malloc(sizeof *ump, M_UFSMNT, M_WAITOK); 62012115Sdyson bzero((caddr_t)ump, sizeof *ump); 62112115Sdyson /* I don't know whether this is the right strategy. Note that 62212115Sdyson we dynamically allocate both a ext2_sb_info and a ext2_super_block 62312115Sdyson while Linux keeps the super block in a locked buffer 62412115Sdyson */ 62512115Sdyson ump->um_e2fs = bsd_malloc(sizeof(struct ext2_sb_info), 62612115Sdyson M_UFSMNT, M_WAITOK); 62712115Sdyson ump->um_e2fs->s_es = bsd_malloc(sizeof(struct ext2_super_block), 62812115Sdyson M_UFSMNT, M_WAITOK); 62912115Sdyson bcopy(es, ump->um_e2fs->s_es, (u_int)sizeof(struct ext2_super_block)); 63012115Sdyson if(error = compute_sb_data(devvp, ump->um_e2fs->s_es, ump->um_e2fs)) { 63112115Sdyson brelse(bp); 63212115Sdyson return error; 63312115Sdyson } 63412115Sdyson brelse(bp); 63512115Sdyson bp = NULL; 63612115Sdyson fs = ump->um_e2fs; 63712115Sdyson fs->s_rd_only = ronly; /* ronly is set according to mnt_flags */ 63812115Sdyson if (!(fs->s_es->s_state & EXT2_VALID_FS)) { 63912115Sdyson printf("WARNING: %s was not properly dismounted\n", 64012115Sdyson fs->fs_fsmnt); 64112115Sdyson } 64212115Sdyson /* if the fs is not mounted read-only, make sure the super block is 64312115Sdyson always written back on a sync() 64412115Sdyson */ 64512115Sdyson if (ronly == 0) { 64612115Sdyson fs->s_dirt = 1; /* mark it modified */ 64712115Sdyson fs->s_es->s_state &= ~EXT2_VALID_FS; /* set fs invalid */ 64812115Sdyson } 64912115Sdyson mp->mnt_data = (qaddr_t)ump; 65012115Sdyson mp->mnt_stat.f_fsid.val[0] = (long)dev; 65112115Sdyson mp->mnt_stat.f_fsid.val[1] = MOUNT_EXT2FS; 65212115Sdyson mp->mnt_maxsymlinklen = EXT2_MAXSYMLINKLEN; 65312115Sdyson mp->mnt_flag |= MNT_LOCAL; 65412115Sdyson ump->um_mountp = mp; 65512115Sdyson ump->um_dev = dev; 65612115Sdyson ump->um_devvp = devvp; 65712115Sdyson /* setting those two parameters allows us to use 65812115Sdyson ufs_bmap w/o changse ! 65912115Sdyson */ 66012115Sdyson ump->um_nindir = EXT2_ADDR_PER_BLOCK(fs); 66112115Sdyson ump->um_bptrtodb = fs->s_es->s_log_block_size + 1; 66212115Sdyson ump->um_seqinc = EXT2_FRAGS_PER_BLOCK(fs); 66312115Sdyson for (i = 0; i < MAXQUOTAS; i++) 66412115Sdyson ump->um_quotas[i] = NULLVP; 66512115Sdyson devvp->v_specflags |= SI_MOUNTEDON; 66612115Sdyson if (ronly == 0) 66712115Sdyson ext2_sbupdate(ump, MNT_WAIT); 66812115Sdyson return (0); 66912115Sdysonout: 67012115Sdyson if (bp) 67112115Sdyson brelse(bp); 67212115Sdyson (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 67312115Sdyson if (ump) { 67412115Sdyson bsd_free(ump->um_fs, M_UFSMNT); 67512115Sdyson bsd_free(ump, M_UFSMNT); 67612115Sdyson mp->mnt_data = (qaddr_t)0; 67712115Sdyson } 67812115Sdyson return (error); 67912115Sdyson} 68012115Sdyson 68112115Sdyson/* 68212115Sdyson * unmount system call 68312115Sdyson */ 68412911Sphkstatic int 68512115Sdysonext2_unmount(mp, mntflags, p) 68612115Sdyson struct mount *mp; 68712115Sdyson int mntflags; 68812115Sdyson struct proc *p; 68912115Sdyson{ 69012115Sdyson register struct ufsmount *ump; 69112115Sdyson register struct ext2_sb_info *fs; 69212115Sdyson int error, flags, ronly, i; 69312115Sdyson 69412115Sdyson flags = 0; 69512115Sdyson if (mntflags & MNT_FORCE) { 69612115Sdyson if (mp->mnt_flag & MNT_ROOTFS) 69712115Sdyson return (EINVAL); 69812115Sdyson flags |= FORCECLOSE; 69912115Sdyson } 70012115Sdyson if (error = ext2_flushfiles(mp, flags, p)) 70112115Sdyson return (error); 70212115Sdyson ump = VFSTOUFS(mp); 70312115Sdyson fs = ump->um_e2fs; 70412115Sdyson ronly = fs->s_rd_only; 70512115Sdyson if (!ronly) { 70612115Sdyson fs->s_es->s_state |= EXT2_VALID_FS; /* was fs_clean = 1 */ 70712115Sdyson ext2_sbupdate(ump, MNT_WAIT); 70812115Sdyson } 70927881Sdyson 71012115Sdyson /* release buffers containing group descriptors */ 71112115Sdyson for(i = 0; i < fs->s_db_per_group; i++) 71227881Sdyson ULCK_BUF(fs->s_group_desc[i]) 71327881Sdyson 71412115Sdyson /* release cached inode/block bitmaps */ 71512115Sdyson for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) 71612115Sdyson if (fs->s_inode_bitmap[i]) 71727881Sdyson ULCK_BUF(fs->s_inode_bitmap[i]) 71827881Sdyson 71912115Sdyson for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) 72012115Sdyson if (fs->s_block_bitmap[i]) 72127881Sdyson ULCK_BUF(fs->s_block_bitmap[i]) 72212115Sdyson 72312115Sdyson ump->um_devvp->v_specflags &= ~SI_MOUNTEDON; 72412115Sdyson error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE, 72512115Sdyson NOCRED, p); 72612115Sdyson vrele(ump->um_devvp); 72712115Sdyson bsd_free(fs->s_es, M_UFSMNT); 72812115Sdyson bsd_free(fs, M_UFSMNT); 72912115Sdyson bsd_free(ump, M_UFSMNT); 73012115Sdyson mp->mnt_data = (qaddr_t)0; 73112115Sdyson mp->mnt_flag &= ~MNT_LOCAL; 73212115Sdyson return (error); 73312115Sdyson} 73412115Sdyson 73512115Sdyson/* 73612115Sdyson * Flush out all the files in a filesystem. 73712115Sdyson */ 73812911Sphkstatic int 73912115Sdysonext2_flushfiles(mp, flags, p) 74012115Sdyson register struct mount *mp; 74112115Sdyson int flags; 74212115Sdyson struct proc *p; 74312115Sdyson{ 74412115Sdyson register struct ufsmount *ump; 74512147Sdyson int error; 74612746Sbde#if QUOTA 74712746Sbde int i; 74812746Sbde#endif 74912115Sdyson 75012115Sdyson ump = VFSTOUFS(mp); 75112115Sdyson#if QUOTA 75212115Sdyson if (mp->mnt_flag & MNT_QUOTA) { 75312115Sdyson if (error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) 75412115Sdyson return (error); 75512115Sdyson for (i = 0; i < MAXQUOTAS; i++) { 75612115Sdyson if (ump->um_quotas[i] == NULLVP) 75712115Sdyson continue; 75812115Sdyson quotaoff(p, mp, i); 75912115Sdyson } 76012115Sdyson /* 76112115Sdyson * Here we fall through to vflush again to ensure 76212115Sdyson * that we have gotten rid of all the system vnodes. 76312115Sdyson */ 76412115Sdyson } 76512115Sdyson#endif 76612115Sdyson error = vflush(mp, NULLVP, flags); 76712115Sdyson return (error); 76812115Sdyson} 76912115Sdyson 77012115Sdyson/* 77112115Sdyson * Get file system statistics. 77212115Sdyson * taken from ext2/super.c ext2_statfs 77312115Sdyson */ 77412911Sphkstatic int 77512115Sdysonext2_statfs(mp, sbp, p) 77612115Sdyson struct mount *mp; 77712115Sdyson register struct statfs *sbp; 77812115Sdyson struct proc *p; 77912115Sdyson{ 78012115Sdyson unsigned long overhead; 78112115Sdyson unsigned long overhead_per_group; 78212115Sdyson 78312115Sdyson register struct ufsmount *ump; 78412115Sdyson register struct ext2_sb_info *fs; 78512115Sdyson register struct ext2_super_block *es; 78612115Sdyson 78712115Sdyson ump = VFSTOUFS(mp); 78812115Sdyson fs = ump->um_e2fs; 78912115Sdyson es = fs->s_es; 79012115Sdyson 79112115Sdyson if (es->s_magic != EXT2_SUPER_MAGIC) 79212115Sdyson panic("ext2_statfs - magic number spoiled"); 79312115Sdyson 79412115Sdyson /* 79512115Sdyson * Compute the overhead (FS structures) 79612115Sdyson */ 79712115Sdyson overhead_per_group = 1 /* super block */ + 79812115Sdyson fs->s_db_per_group + 79912115Sdyson 1 /* block bitmap */ + 80012115Sdyson 1 /* inode bitmap */ + 80112115Sdyson fs->s_itb_per_group; 80212115Sdyson overhead = es->s_first_data_block + 80312115Sdyson fs->s_groups_count * overhead_per_group; 80412115Sdyson 80512115Sdyson sbp->f_type = MOUNT_EXT2FS; 80612115Sdyson sbp->f_bsize = EXT2_FRAG_SIZE(fs); 80712115Sdyson sbp->f_iosize = EXT2_BLOCK_SIZE(fs); 80812115Sdyson sbp->f_blocks = es->s_blocks_count - overhead; 80912115Sdyson sbp->f_bfree = es->s_free_blocks_count; 81012115Sdyson sbp->f_bavail = sbp->f_bfree - es->s_r_blocks_count; 81112115Sdyson sbp->f_files = es->s_inodes_count; 81212115Sdyson sbp->f_ffree = es->s_free_inodes_count; 81312115Sdyson if (sbp != &mp->mnt_stat) { 81412115Sdyson bcopy((caddr_t)mp->mnt_stat.f_mntonname, 81512115Sdyson (caddr_t)&sbp->f_mntonname[0], MNAMELEN); 81612115Sdyson bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 81712115Sdyson (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 81812115Sdyson } 81912115Sdyson return (0); 82012115Sdyson} 82112115Sdyson 82212115Sdyson/* 82312115Sdyson * Go through the disk queues to initiate sandbagged IO; 82412115Sdyson * go through the inodes to write those that have been modified; 82512115Sdyson * initiate the writing of the super block if it has been modified. 82612115Sdyson * 82712115Sdyson * Note: we are always called with the filesystem marked `MPBUSY'. 82812115Sdyson */ 82912911Sphkstatic int 83012115Sdysonext2_sync(mp, waitfor, cred, p) 83112115Sdyson struct mount *mp; 83212115Sdyson int waitfor; 83312115Sdyson struct ucred *cred; 83412115Sdyson struct proc *p; 83512115Sdyson{ 83612115Sdyson register struct vnode *vp; 83712115Sdyson register struct inode *ip; 83812115Sdyson register struct ufsmount *ump = VFSTOUFS(mp); 83912115Sdyson register struct ext2_sb_info *fs; 84012115Sdyson int error, allerror = 0; 84112115Sdyson 84212115Sdyson fs = ump->um_e2fs; 84312115Sdyson /* 84412115Sdyson * Write back modified superblock. 84512115Sdyson * Consistency check that the superblock 84612115Sdyson * is still in the buffer cache. 84712115Sdyson */ 84812115Sdyson if (fs->s_dirt) { 84912115Sdyson#if !defined(__FreeBSD__) 85012115Sdyson struct timeval time; 85112115Sdyson#endif 85212115Sdyson 85312115Sdyson if (fs->s_rd_only != 0) { /* XXX */ 85412115Sdyson printf("fs = %s\n", fs->fs_fsmnt); 85512115Sdyson panic("update: rofs mod"); 85612115Sdyson } 85712115Sdyson fs->s_dirt = 0; 85812115Sdyson#if !defined(__FreeBSD__) 85912115Sdyson get_time(&time); 86012115Sdyson#endif 86112115Sdyson fs->s_es->s_wtime = time.tv_sec; 86212115Sdyson allerror = ext2_sbupdate(ump, waitfor); 86312115Sdyson } 86412115Sdyson /* 86512115Sdyson * Write back each (modified) inode. 86612115Sdyson */ 86712115Sdysonloop: 86812115Sdyson for (vp = mp->mnt_vnodelist.lh_first; 86912115Sdyson vp != NULL; 87012115Sdyson vp = vp->v_mntvnodes.le_next) { 87112115Sdyson /* 87212115Sdyson * If the vnode that we are about to sync is no longer 87312115Sdyson * associated with this mount point, start over. 87412115Sdyson */ 87512115Sdyson if (vp->v_mount != mp) 87612115Sdyson goto loop; 87712115Sdyson if (VOP_ISLOCKED(vp)) 87812115Sdyson continue; 87912115Sdyson ip = VTOI(vp); 88012115Sdyson if ((ip->i_flag & 88112115Sdyson (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 88212115Sdyson vp->v_dirtyblkhd.lh_first == NULL) 88312115Sdyson continue; 88422521Sdyson if (vget(vp, LK_EXCLUSIVE, p)) 88512115Sdyson goto loop; 88612115Sdyson if (error = VOP_FSYNC(vp, cred, waitfor, p)) 88712115Sdyson allerror = error; 88812115Sdyson vput(vp); 88912115Sdyson } 89012115Sdyson /* 89112115Sdyson * Force stale file system control information to be flushed. 89212115Sdyson */ 89312115Sdyson if (error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p)) 89412115Sdyson allerror = error; 89512115Sdyson#if QUOTA 89612115Sdyson qsync(mp); 89712115Sdyson#endif 89812115Sdyson return (allerror); 89912115Sdyson} 90012115Sdyson 90112115Sdyson/* 90212115Sdyson * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it 90312115Sdyson * in from disk. If it is in core, wait for the lock bit to clear, then 90412115Sdyson * return the inode locked. Detection and handling of mount points must be 90512115Sdyson * done by the calling routine. 90612115Sdyson */ 90712911Sphkstatic int 90812115Sdysonext2_vget(mp, ino, vpp) 90912115Sdyson struct mount *mp; 91012115Sdyson ino_t ino; 91112115Sdyson struct vnode **vpp; 91212115Sdyson{ 91312115Sdyson register struct ext2_sb_info *fs; 91412115Sdyson register struct inode *ip; 91512115Sdyson struct ufsmount *ump; 91612115Sdyson struct buf *bp; 91712115Sdyson struct vnode *vp; 91812115Sdyson dev_t dev; 91912115Sdyson int i, type, error; 92012115Sdyson int used_blocks; 92112115Sdyson 92212115Sdyson ump = VFSTOUFS(mp); 92312115Sdyson dev = ump->um_dev; 92412406Sdysonrestart: 92512115Sdyson if ((*vpp = ufs_ihashget(dev, ino)) != NULL) 92612115Sdyson return (0); 92712115Sdyson 92812406Sdyson#ifdef __FreeBSD__ 92912406Sdyson /* 93012406Sdyson * Lock out the creation of new entries in the FFS hash table in 93112406Sdyson * case getnewvnode() or MALLOC() blocks, otherwise a duplicate 93212406Sdyson * may occur! 93312406Sdyson */ 93412406Sdyson if (ext2fs_inode_hash_lock) { 93512406Sdyson while (ext2fs_inode_hash_lock) { 93612406Sdyson ext2fs_inode_hash_lock = -1; 93712406Sdyson tsleep(&ext2fs_inode_hash_lock, PVM, "ffsvgt", 0); 93812406Sdyson } 93912406Sdyson goto restart; 94012406Sdyson } 94112406Sdyson ext2fs_inode_hash_lock = 1; 94212406Sdyson#endif 94312406Sdyson 94412115Sdyson /* Allocate a new vnode/inode. */ 94512115Sdyson if (error = getnewvnode(VT_UFS, mp, ext2_vnodeop_p, &vp)) { 94612115Sdyson *vpp = NULL; 94712115Sdyson return (error); 94812115Sdyson } 94912115Sdyson /* I don't really know what this 'type' does. I suppose it's some kind 95012115Sdyson * of memory accounting. Let's just book this memory on FFS's account 95112115Sdyson * If I'm not mistaken, this stuff isn't implemented anyway in Lites 95212115Sdyson */ 95312115Sdyson type = ump->um_devvp->v_tag == VT_MFS ? M_MFSNODE : M_FFSNODE; /* XXX */ 95412115Sdyson MALLOC(ip, struct inode *, sizeof(struct inode), type, M_WAITOK); 95512406Sdyson#ifndef __FreeBSD__ 95612115Sdyson insmntque(vp, mp); 95712406Sdyson#endif 95812115Sdyson bzero((caddr_t)ip, sizeof(struct inode)); 95912115Sdyson vp->v_data = ip; 96012115Sdyson ip->i_vnode = vp; 96112115Sdyson ip->i_e2fs = fs = ump->um_e2fs; 96212115Sdyson ip->i_dev = dev; 96312115Sdyson ip->i_number = ino; 96412115Sdyson#if QUOTA 96512115Sdyson for (i = 0; i < MAXQUOTAS; i++) 96612115Sdyson ip->i_dquot[i] = NODQUOT; 96712115Sdyson#endif 96812115Sdyson /* 96912115Sdyson * Put it onto its hash chain and lock it so that other requests for 97012115Sdyson * this inode will block if they arrive while we are sleeping waiting 97112115Sdyson * for old data structures to be purged or for the contents of the 97212115Sdyson * disk portion of this inode to be read. 97312115Sdyson */ 97412115Sdyson ufs_ihashins(ip); 97512115Sdyson 97612406Sdyson#ifdef __FreeBSD__ 97712406Sdyson if (ext2fs_inode_hash_lock < 0) 97812406Sdyson wakeup(&ext2fs_inode_hash_lock); 97912406Sdyson ext2fs_inode_hash_lock = 0; 98012406Sdyson#endif 98112406Sdyson 98212115Sdyson /* Read in the disk contents for the inode, copy into the inode. */ 98312406Sdyson /* Read in the disk contents for the inode, copy into the inode. */ 98412115Sdyson#if 0 98512115Sdysonprintf("ext2_vget(%d) dbn= %d ", ino, fsbtodb(fs, ino_to_fsba(fs, ino))); 98612115Sdyson#endif 98712115Sdyson if (error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 98812115Sdyson (int)fs->s_blocksize, NOCRED, &bp)) { 98912115Sdyson /* 99012115Sdyson * The inode does not contain anything useful, so it would 99112115Sdyson * be misleading to leave it on its hash chain. With mode 99212115Sdyson * still zero, it will be unlinked and returned to the free 99312115Sdyson * list by vput(). 99412115Sdyson */ 99512115Sdyson vput(vp); 99612115Sdyson brelse(bp); 99712115Sdyson *vpp = NULL; 99812115Sdyson return (error); 99912115Sdyson } 100012115Sdyson /* convert ext2 inode to dinode */ 100112115Sdyson ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data + EXT2_INODE_SIZE * 100212115Sdyson ino_to_fsbo(fs, ino)), &ip->i_din); 100312115Sdyson ip->i_block_group = ino_to_cg(fs, ino); 100412115Sdyson ip->i_next_alloc_block = 0; 100512115Sdyson ip->i_next_alloc_goal = 0; 100612115Sdyson ip->i_prealloc_count = 0; 100712115Sdyson ip->i_prealloc_block = 0; 100812115Sdyson /* now we want to make sure that block pointers for unused 100912115Sdyson blocks are zeroed out - ext2_balloc depends on this 101012115Sdyson although for regular files and directories only 101112115Sdyson */ 101212115Sdyson if(S_ISDIR(ip->i_mode) || S_ISREG(ip->i_mode)) { 101312115Sdyson used_blocks = (ip->i_size+fs->s_blocksize-1) / fs->s_blocksize; 101412115Sdyson for(i = used_blocks; i < EXT2_NDIR_BLOCKS; i++) 101512115Sdyson ip->i_db[i] = 0; 101612115Sdyson } 101712115Sdyson/* 101812115Sdyson ext2_print_inode(ip); 101912115Sdyson*/ 102012115Sdyson brelse(bp); 102112115Sdyson 102212115Sdyson /* 102312115Sdyson * Initialize the vnode from the inode, check for aliases. 102412115Sdyson * Note that the underlying vnode may have changed. 102512115Sdyson */ 102614249Sbde if (error = ufs_vinit(mp, ext2_specop_p, ext2_fifoop_p, &vp)) { 102712115Sdyson vput(vp); 102812115Sdyson *vpp = NULL; 102912115Sdyson return (error); 103012115Sdyson } 103112115Sdyson /* 103212115Sdyson * Finish inode initialization now that aliasing has been resolved. 103312115Sdyson */ 103412115Sdyson ip->i_devvp = ump->um_devvp; 103512115Sdyson VREF(ip->i_devvp); 103612115Sdyson /* 103712115Sdyson * Set up a generation number for this inode if it does not 103812115Sdyson * already have one. This should only happen on old filesystems. 103912115Sdyson */ 104012115Sdyson if (ip->i_gen == 0) { 104112115Sdyson#if !defined(__FreeBSD__) 104212115Sdyson struct timeval time; 104312115Sdyson get_time(&time); 104412115Sdyson#endif 104512115Sdyson if (++nextgennumber < (u_long)time.tv_sec) 104612115Sdyson nextgennumber = time.tv_sec; 104712115Sdyson ip->i_gen = nextgennumber; 104812115Sdyson if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 104912115Sdyson ip->i_flag |= IN_MODIFIED; 105012115Sdyson } 105112115Sdyson *vpp = vp; 105212115Sdyson return (0); 105312115Sdyson} 105412115Sdyson 105512115Sdyson/* 105612115Sdyson * File handle to vnode 105712115Sdyson * 105812115Sdyson * Have to be really careful about stale file handles: 105912115Sdyson * - check that the inode number is valid 106012115Sdyson * - call ext2_vget() to get the locked inode 106112115Sdyson * - check for an unallocated inode (i_mode == 0) 106212115Sdyson * - check that the given client host has export rights and return 106312115Sdyson * those rights via. exflagsp and credanonp 106412115Sdyson */ 106512911Sphkstatic int 106612115Sdysonext2_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 106712115Sdyson register struct mount *mp; 106812115Sdyson struct fid *fhp; 106928270Swollman struct sockaddr *nam; 107012115Sdyson struct vnode **vpp; 107112115Sdyson int *exflagsp; 107212115Sdyson struct ucred **credanonp; 107312115Sdyson{ 107412115Sdyson register struct ufid *ufhp; 107512115Sdyson struct ext2_sb_info *fs; 107612115Sdyson 107712115Sdyson ufhp = (struct ufid *)fhp; 107812115Sdyson fs = VFSTOUFS(mp)->um_e2fs; 107912115Sdyson if (ufhp->ufid_ino < ROOTINO || 108012115Sdyson ufhp->ufid_ino >= fs->s_groups_count * fs->s_es->s_inodes_per_group) 108112115Sdyson return (ESTALE); 108212115Sdyson return (ufs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp)); 108312115Sdyson} 108412115Sdyson 108512115Sdyson/* 108612115Sdyson * Vnode pointer to File handle 108712115Sdyson */ 108812115Sdyson/* ARGSUSED */ 108912911Sphkstatic int 109012115Sdysonext2_vptofh(vp, fhp) 109112115Sdyson struct vnode *vp; 109212115Sdyson struct fid *fhp; 109312115Sdyson{ 109412115Sdyson register struct inode *ip; 109512115Sdyson register struct ufid *ufhp; 109612115Sdyson 109712115Sdyson ip = VTOI(vp); 109812115Sdyson ufhp = (struct ufid *)fhp; 109912115Sdyson ufhp->ufid_len = sizeof(struct ufid); 110012115Sdyson ufhp->ufid_ino = ip->i_number; 110112115Sdyson ufhp->ufid_gen = ip->i_gen; 110212115Sdyson return (0); 110312115Sdyson} 110412115Sdyson 110512115Sdyson/* 110612115Sdyson * Write a superblock and associated information back to disk. 110712115Sdyson */ 110812911Sphkstatic int 110912115Sdysonext2_sbupdate(mp, waitfor) 111012115Sdyson struct ufsmount *mp; 111112115Sdyson int waitfor; 111212115Sdyson{ 111312115Sdyson register struct ext2_sb_info *fs = mp->um_e2fs; 111412115Sdyson register struct ext2_super_block *es = fs->s_es; 111512115Sdyson register struct buf *bp; 111612147Sdyson int i, error = 0; 111712115Sdyson/* 111812115Sdysonprintf("\nupdating superblock, waitfor=%s\n", waitfor == MNT_WAIT ? "yes":"no"); 111912115Sdyson*/ 112012115Sdyson bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0); 112112115Sdyson bcopy((caddr_t)es, bp->b_data, (u_int)sizeof(struct ext2_super_block)); 112212115Sdyson if (waitfor == MNT_WAIT) 112312115Sdyson error = bwrite(bp); 112412115Sdyson else 112512115Sdyson bawrite(bp); 112612115Sdyson 112727881Sdyson /* 112827881Sdyson * The buffers for group descriptors, inode bitmaps and block bitmaps 112927881Sdyson * are not busy at this point and are (hopefully) written by the 113027881Sdyson * usual sync mechanism. No need to write them here 113112115Sdyson */ 113212115Sdyson 113312115Sdyson return (error); 113412115Sdyson} 1135