ext2_vfsops.c revision 29888
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> 5624131Sbde#include <sys/fcntl.h> 5712115Sdyson#include <sys/disklabel.h> 5812115Sdyson#include <sys/malloc.h> 5912115Sdyson#include <sys/stat.h> 6012115Sdyson 6112115Sdyson#include <miscfs/specfs/specdev.h> 6212115Sdyson 6312115Sdyson#include <ufs/ufs/quota.h> 6412115Sdyson#include <ufs/ufs/ufsmount.h> 6512115Sdyson#include <ufs/ufs/inode.h> 6612115Sdyson#include <ufs/ufs/ufs_extern.h> 6712115Sdyson 6812115Sdyson#include <gnu/ext2fs/fs.h> 6912115Sdyson#include <gnu/ext2fs/ext2_extern.h> 7012115Sdyson#include <gnu/ext2fs/ext2_fs.h> 7112115Sdyson#include <gnu/ext2fs/ext2_fs_sb.h> 7212115Sdyson 7328270Swollmanstatic int ext2_fhtovp __P((struct mount *, struct fid *, struct sockaddr *, 7412911Sphk struct vnode **, int *, struct ucred **)); 7512911Sphkstatic int ext2_flushfiles __P((struct mount *mp, int flags, struct proc *p)); 7612911Sphkstatic int ext2_mount __P((struct mount *, 7712911Sphk char *, caddr_t, struct nameidata *, struct proc *)); 7812911Sphkstatic int ext2_mountfs __P((struct vnode *, struct mount *, struct proc *)); 7912911Sphkstatic int ext2_reload __P((struct mount *mountp, struct ucred *cred, 8012911Sphk struct proc *p)); 8112911Sphkstatic int ext2_sbupdate __P((struct ufsmount *, int)); 8212911Sphkstatic int ext2_statfs __P((struct mount *, struct statfs *, struct proc *)); 8312911Sphkstatic int ext2_sync __P((struct mount *, int, struct ucred *, struct proc *)); 8412911Sphkstatic int ext2_unmount __P((struct mount *, int, struct proc *)); 8512911Sphkstatic int ext2_vget __P((struct mount *, ino_t, struct vnode **)); 8612911Sphkstatic int ext2_vptofh __P((struct vnode *, struct fid *)); 8712115Sdyson 8812911Sphkstatic struct vfsops ext2fs_vfsops = { 8912115Sdyson ext2_mount, 9012115Sdyson ufs_start, /* empty function */ 9112115Sdyson ext2_unmount, 9212115Sdyson ufs_root, /* root inode via vget */ 9312115Sdyson ufs_quotactl, /* does operations associated with quotas */ 9412115Sdyson ext2_statfs, 9512115Sdyson ext2_sync, 9612115Sdyson ext2_vget, 9712115Sdyson ext2_fhtovp, 9812115Sdyson ext2_vptofh, 9912115Sdyson ext2_init, 10012115Sdyson}; 10112115Sdyson 10212115Sdyson#if defined(__FreeBSD__) 10312115SdysonVFS_SET(ext2fs_vfsops, ext2fs, MOUNT_EXT2FS, 0); 10412115Sdyson#define bsd_malloc malloc 10512115Sdyson#define bsd_free free 10612115Sdyson#endif 10712115Sdyson 10812115Sdysonextern u_long nextgennumber; 10912406Sdyson#ifdef __FreeBSD__ 11012911Sphkstatic int ext2fs_inode_hash_lock; 11112406Sdyson#endif 11212115Sdyson 11316322Sgpalmerstatic int compute_sb_data __P((struct vnode * devvp, 11416322Sgpalmer struct ext2_super_block * es, 11516322Sgpalmer struct ext2_sb_info * fs)); 11616322Sgpalmer 11716322Sgpalmer#ifdef notyet 11816322Sgpalmerstatic int ext2_mountroot __P((void)); 11916322Sgpalmer 12012115Sdyson/* 12116322Sgpalmer * Called by main() when ext2fs is going to be mounted as root. 12212115Sdyson * 12312115Sdyson * Name is updated by mount(8) after booting. 12412115Sdyson */ 12512115Sdyson#define ROOTNAME "root_device" 12612115Sdyson 12712911Sphkstatic int 12812115Sdysonext2_mountroot() 12912115Sdyson{ 13012115Sdyson#if !defined(__FreeBSD__) 13112115Sdyson extern struct vnode *rootvp; 13212115Sdyson#endif 13312115Sdyson register struct ext2_sb_info *fs; 13412115Sdyson register struct mount *mp; 13512115Sdyson#if defined(__FreeBSD__) 13612115Sdyson struct proc *p = curproc; 13712115Sdyson#else 13812115Sdyson struct proc *p = get_proc(); /* XXX */ 13912115Sdyson#endif 14012115Sdyson struct ufsmount *ump; 14112115Sdyson u_int size; 14212115Sdyson int error; 14312115Sdyson 14429208Sbde if ((error = bdevvp(rootdev, &rootvp))) { 14529208Sbde printf("ext2_mountroot: can't find rootvp"); 14629208Sbde return (error); 14729208Sbde } 14812115Sdyson mp = bsd_malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK); 14912115Sdyson bzero((char *)mp, (u_long)sizeof(struct mount)); 15012115Sdyson mp->mnt_op = &ext2fs_vfsops; 15112115Sdyson mp->mnt_flag = MNT_RDONLY; 15229888Skato if (bdevsw[major(rootdev)]->d_flags & D_NOCLUSTERR) 15329888Skato mp->mnt_flag |= MNT_NOCLUSTERR; 15429888Skato if (bdevsw[major(rootdev)]->d_flags & D_NOCLUSTERW) 15529888Skato mp->mnt_flag |= MNT_NOCLUSTERW; 15612115Sdyson if (error = ext2_mountfs(rootvp, mp, p)) { 15712115Sdyson bsd_free(mp, M_MOUNT); 15812115Sdyson return (error); 15912115Sdyson } 16012115Sdyson if (error = vfs_lock(mp)) { 16112115Sdyson (void)ext2_unmount(mp, 0, p); 16212115Sdyson bsd_free(mp, M_MOUNT); 16312115Sdyson return (error); 16412115Sdyson } 16512115Sdyson#if defined(__FreeBSD__) 16612115Sdyson CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 16712115Sdyson#else 16812115Sdyson TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list); 16912115Sdyson#endif 17012115Sdyson mp->mnt_flag |= MNT_ROOTFS; 17112115Sdyson mp->mnt_vnodecovered = NULLVP; 17212115Sdyson ump = VFSTOUFS(mp); 17312115Sdyson fs = ump->um_e2fs; 17412115Sdyson bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt)); 17512115Sdyson fs->fs_fsmnt[0] = '/'; 17612115Sdyson bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, 17712115Sdyson MNAMELEN); 17812115Sdyson (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 17912115Sdyson &size); 18012115Sdyson bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 18112115Sdyson (void)ext2_statfs(mp, &mp->mnt_stat, p); 18212115Sdyson vfs_unlock(mp); 18312115Sdyson inittodr(fs->s_es->s_wtime); /* this helps to set the time */ 18412115Sdyson return (0); 18512115Sdyson} 18616322Sgpalmer#endif 18712115Sdyson 18812115Sdyson/* 18912115Sdyson * VFS Operations. 19012115Sdyson * 19112115Sdyson * mount system call 19212115Sdyson */ 19312911Sphkstatic int 19412115Sdysonext2_mount(mp, path, data, ndp, p) 19512115Sdyson register struct mount *mp; 19612115Sdyson char *path; 19712115Sdyson caddr_t data; /* this is actually a (struct ufs_args *) */ 19812115Sdyson struct nameidata *ndp; 19912115Sdyson struct proc *p; 20012115Sdyson{ 20112115Sdyson struct vnode *devvp; 20212115Sdyson struct ufs_args args; 20312115Sdyson struct ufsmount *ump = 0; 20412115Sdyson register struct ext2_sb_info *fs; 20512115Sdyson u_int size; 20612115Sdyson int error, flags; 20712115Sdyson 20812115Sdyson if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args))) 20912115Sdyson return (error); 21012115Sdyson /* 21112115Sdyson * If updating, check whether changing from read-only to 21212115Sdyson * read/write; if there is no device name, that's all we do. 21329888Skato * Disallow clearing MNT_NOCLUSTERR and MNT_NOCLUSTERW flags, 21429888Skato * if block device requests. 21512115Sdyson */ 21612115Sdyson if (mp->mnt_flag & MNT_UPDATE) { 21712115Sdyson ump = VFSTOUFS(mp); 21812115Sdyson fs = ump->um_e2fs; 21912115Sdyson error = 0; 22029888Skato if (bdevsw[major(ump->um_dev)]->d_flags & D_NOCLUSTERR) 22129888Skato mp->mnt_flag |= MNT_NOCLUSTERR; 22229888Skato if (bdevsw[major(ump->um_dev)]->d_flags & D_NOCLUSTERW) 22329888Skato mp->mnt_flag |= MNT_NOCLUSTERW; 22412115Sdyson if (fs->s_rd_only == 0 && (mp->mnt_flag & MNT_RDONLY)) { 22512115Sdyson flags = WRITECLOSE; 22612115Sdyson if (mp->mnt_flag & MNT_FORCE) 22712115Sdyson flags |= FORCECLOSE; 22822521Sdyson if (vfs_busy(mp, LK_NOWAIT, 0, p)) 22912115Sdyson return (EBUSY); 23012115Sdyson error = ext2_flushfiles(mp, flags, p); 23122521Sdyson vfs_unbusy(mp, p); 23212115Sdyson } 23312115Sdyson if (!error && (mp->mnt_flag & MNT_RELOAD)) 23412115Sdyson error = ext2_reload(mp, ndp->ni_cnd.cn_cred, p); 23512115Sdyson if (error) 23612115Sdyson return (error); 23712115Sdyson if (fs->s_rd_only && (mp->mnt_flag & MNT_WANTRDWR)) 23812115Sdyson fs->s_rd_only = 0; 23912115Sdyson if (fs->s_rd_only == 0) { 24012115Sdyson /* don't say it's clean */ 24112115Sdyson fs->s_es->s_state &= ~EXT2_VALID_FS; 24212115Sdyson ext2_sbupdate(ump, MNT_WAIT); 24312115Sdyson } 24412115Sdyson if (args.fspec == 0) { 24512115Sdyson /* 24612115Sdyson * Process export requests. 24712115Sdyson */ 24812115Sdyson return (vfs_export(mp, &ump->um_export, &args.export)); 24912115Sdyson } 25012115Sdyson } 25112115Sdyson /* 25212115Sdyson * Not an update, or updating the name: look up the name 25312115Sdyson * and verify that it refers to a sensible block device. 25412115Sdyson */ 25512115Sdyson NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 25612115Sdyson if (error = namei(ndp)) 25712115Sdyson return (error); 25812115Sdyson devvp = ndp->ni_vp; 25912115Sdyson 26012115Sdyson if (devvp->v_type != VBLK) { 26112115Sdyson vrele(devvp); 26212115Sdyson return (ENOTBLK); 26312115Sdyson } 26412115Sdyson if (major(devvp->v_rdev) >= nblkdev) { 26512115Sdyson vrele(devvp); 26612115Sdyson return (ENXIO); 26712115Sdyson } 26829888Skato if ((mp->mnt_flag & MNT_UPDATE) == 0) { 26929888Skato if (bdevsw[major(devvp->v_rdev)]->d_flags & D_NOCLUSTERR) 27029888Skato mp->mnt_flag |= MNT_NOCLUSTERR; 27129888Skato if (bdevsw[major(devvp->v_rdev)]->d_flags & D_NOCLUSTERW) 27229888Skato mp->mnt_flag |= MNT_NOCLUSTERW; 27312115Sdyson error = ext2_mountfs(devvp, mp, p); 27429888Skato } else { 27512115Sdyson if (devvp != ump->um_devvp) 27612115Sdyson error = EINVAL; /* needs translation */ 27712115Sdyson else 27812115Sdyson vrele(devvp); 27912115Sdyson } 28012115Sdyson if (error) { 28112115Sdyson vrele(devvp); 28212115Sdyson return (error); 28312115Sdyson } 28412115Sdyson ump = VFSTOUFS(mp); 28512115Sdyson fs = ump->um_e2fs; 28612115Sdyson (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size); 28712115Sdyson bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size); 28812115Sdyson bcopy((caddr_t)fs->fs_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname, 28912115Sdyson MNAMELEN); 29012115Sdyson (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 29112115Sdyson &size); 29212115Sdyson bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 29312115Sdyson (void)ext2_statfs(mp, &mp->mnt_stat, p); 29412115Sdyson return (0); 29512115Sdyson} 29612115Sdyson 29712115Sdyson/* 29812115Sdyson * checks that the data in the descriptor blocks make sense 29912115Sdyson * this is taken from ext2/super.c 30012115Sdyson */ 30112115Sdysonstatic int ext2_check_descriptors (struct ext2_sb_info * sb) 30212115Sdyson{ 30312115Sdyson int i; 30412115Sdyson int desc_block = 0; 30512115Sdyson unsigned long block = sb->s_es->s_first_data_block; 30612115Sdyson struct ext2_group_desc * gdp = NULL; 30712115Sdyson 30812115Sdyson /* ext2_debug ("Checking group descriptors"); */ 30912115Sdyson 31012115Sdyson for (i = 0; i < sb->s_groups_count; i++) 31112115Sdyson { 31212115Sdyson /* examine next descriptor block */ 31312115Sdyson if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0) 31412115Sdyson gdp = (struct ext2_group_desc *) 31512115Sdyson sb->s_group_desc[desc_block++]->b_data; 31612115Sdyson if (gdp->bg_block_bitmap < block || 31712115Sdyson gdp->bg_block_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb)) 31812115Sdyson { 31912115Sdyson printf ("ext2_check_descriptors: " 32012115Sdyson "Block bitmap for group %d" 32112115Sdyson " not in group (block %lu)!", 32212115Sdyson i, (unsigned long) gdp->bg_block_bitmap); 32312115Sdyson return 0; 32412115Sdyson } 32512115Sdyson if (gdp->bg_inode_bitmap < block || 32612115Sdyson gdp->bg_inode_bitmap >= block + EXT2_BLOCKS_PER_GROUP(sb)) 32712115Sdyson { 32812115Sdyson printf ("ext2_check_descriptors: " 32912115Sdyson "Inode bitmap for group %d" 33012115Sdyson " not in group (block %lu)!", 33112115Sdyson i, (unsigned long) gdp->bg_inode_bitmap); 33212115Sdyson return 0; 33312115Sdyson } 33412115Sdyson if (gdp->bg_inode_table < block || 33512115Sdyson gdp->bg_inode_table + sb->s_itb_per_group >= 33612115Sdyson block + EXT2_BLOCKS_PER_GROUP(sb)) 33712115Sdyson { 33812115Sdyson printf ("ext2_check_descriptors: " 33912115Sdyson "Inode table for group %d" 34012115Sdyson " not in group (block %lu)!", 34112115Sdyson i, (unsigned long) gdp->bg_inode_table); 34212115Sdyson return 0; 34312115Sdyson } 34412115Sdyson block += EXT2_BLOCKS_PER_GROUP(sb); 34512115Sdyson gdp++; 34612115Sdyson } 34712115Sdyson return 1; 34812115Sdyson} 34912115Sdyson 35012115Sdyson/* 35112115Sdyson * this computes the fields of the ext2_sb_info structure from the 35212115Sdyson * data in the ext2_super_block structure read in 35312115Sdyson */ 35412115Sdysonstatic int compute_sb_data(devvp, es, fs) 35512115Sdyson struct vnode * devvp; 35612115Sdyson struct ext2_super_block * es; 35712115Sdyson struct ext2_sb_info * fs; 35812115Sdyson{ 35912115Sdyson int db_count, error; 36012115Sdyson int i, j; 36112115Sdyson int logic_sb_block = 1; /* XXX for now */ 36212115Sdyson 36312115Sdyson#if 1 36412115Sdyson#define V(v) 36512115Sdyson#else 36612115Sdyson#define V(v) printf(#v"= %d\n", fs->v); 36712115Sdyson#endif 36812115Sdyson 36912115Sdyson fs->s_blocksize = EXT2_MIN_BLOCK_SIZE << es->s_log_block_size; 37012115Sdyson V(s_blocksize) 37112115Sdyson fs->s_bshift = EXT2_MIN_BLOCK_LOG_SIZE + es->s_log_block_size; 37212115Sdyson V(s_bshift) 37312115Sdyson fs->s_fsbtodb = es->s_log_block_size + 1; 37412115Sdyson V(s_fsbtodb) 37512115Sdyson fs->s_qbmask = fs->s_blocksize - 1; 37612115Sdyson V(s_bmask) 37712115Sdyson fs->s_blocksize_bits = EXT2_BLOCK_SIZE_BITS(es); 37812115Sdyson V(s_blocksize_bits) 37912115Sdyson fs->s_frag_size = EXT2_MIN_FRAG_SIZE << es->s_log_frag_size; 38012115Sdyson V(s_frag_size) 38112115Sdyson if (fs->s_frag_size) 38212115Sdyson fs->s_frags_per_block = fs->s_blocksize / fs->s_frag_size; 38312115Sdyson V(s_frags_per_block) 38412115Sdyson fs->s_blocks_per_group = es->s_blocks_per_group; 38512115Sdyson V(s_blocks_per_group) 38612115Sdyson fs->s_frags_per_group = es->s_frags_per_group; 38712115Sdyson V(s_frags_per_group) 38812115Sdyson fs->s_inodes_per_group = es->s_inodes_per_group; 38912115Sdyson V(s_inodes_per_group) 39012115Sdyson fs->s_inodes_per_block = fs->s_blocksize / EXT2_INODE_SIZE; 39112115Sdyson V(s_inodes_per_block) 39212115Sdyson fs->s_itb_per_group = fs->s_inodes_per_group /fs->s_inodes_per_block; 39312115Sdyson V(s_itb_per_group) 39412115Sdyson fs->s_desc_per_block = fs->s_blocksize / sizeof (struct ext2_group_desc); 39512115Sdyson V(s_desc_per_block) 39612115Sdyson /* s_resuid / s_resgid ? */ 39712115Sdyson fs->s_groups_count = (es->s_blocks_count - 39812115Sdyson es->s_first_data_block + 39912115Sdyson EXT2_BLOCKS_PER_GROUP(fs) - 1) / 40012115Sdyson EXT2_BLOCKS_PER_GROUP(fs); 40112115Sdyson V(s_groups_count) 40212115Sdyson db_count = (fs->s_groups_count + EXT2_DESC_PER_BLOCK(fs) - 1) / 40312115Sdyson EXT2_DESC_PER_BLOCK(fs); 40412115Sdyson fs->s_db_per_group = db_count; 40512115Sdyson V(s_db_per_group) 40612115Sdyson 40712115Sdyson fs->s_group_desc = bsd_malloc(db_count * sizeof (struct buf *), 40812115Sdyson M_UFSMNT, M_WAITOK); 40912115Sdyson 41012115Sdyson /* adjust logic_sb_block */ 41112115Sdyson if(fs->s_blocksize > SBSIZE) 41212115Sdyson /* Godmar thinks: if the blocksize is greater than 1024, then 41312115Sdyson the superblock is logically part of block zero. 41412115Sdyson */ 41512115Sdyson logic_sb_block = 0; 41612115Sdyson 41712115Sdyson for (i = 0; i < db_count; i++) { 41812115Sdyson error = bread(devvp , fsbtodb(fs, logic_sb_block + i + 1), 41912115Sdyson fs->s_blocksize, NOCRED, &fs->s_group_desc[i]); 42012115Sdyson if(error) { 42112115Sdyson for (j = 0; j < i; j++) 42212115Sdyson brelse(fs->s_group_desc[j]); 42312115Sdyson bsd_free(fs->s_group_desc, M_UFSMNT); 42412115Sdyson printf("EXT2-fs: unable to read group descriptors (%d)\n", error); 42512115Sdyson return EIO; 42612115Sdyson } 42727881Sdyson /* Set the B_LOCKED flag on the buffer, then brelse() it */ 42827881Sdyson LCK_BUF(fs->s_group_desc[i]) 42912115Sdyson } 43012115Sdyson if(!ext2_check_descriptors(fs)) { 43112115Sdyson for (j = 0; j < db_count; j++) 43227881Sdyson ULCK_BUF(fs->s_group_desc[j]) 43312115Sdyson bsd_free(fs->s_group_desc, M_UFSMNT); 43412115Sdyson printf("EXT2-fs: (ext2_check_descriptors failure) " 43512115Sdyson "unable to read group descriptors\n"); 43612115Sdyson return EIO; 43712115Sdyson } 43812115Sdyson 43912115Sdyson for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) { 44012115Sdyson fs->s_inode_bitmap_number[i] = 0; 44112115Sdyson fs->s_inode_bitmap[i] = NULL; 44212115Sdyson fs->s_block_bitmap_number[i] = 0; 44312115Sdyson fs->s_block_bitmap[i] = NULL; 44412115Sdyson } 44512115Sdyson fs->s_loaded_inode_bitmaps = 0; 44612115Sdyson fs->s_loaded_block_bitmaps = 0; 44712115Sdyson return 0; 44812115Sdyson} 44912115Sdyson 45012115Sdyson/* 45112115Sdyson * Reload all incore data for a filesystem (used after running fsck on 45212115Sdyson * the root filesystem and finding things to fix). The filesystem must 45312115Sdyson * be mounted read-only. 45412115Sdyson * 45512115Sdyson * Things to do to update the mount: 45612115Sdyson * 1) invalidate all cached meta-data. 45712115Sdyson * 2) re-read superblock from disk. 45812115Sdyson * 3) re-read summary information from disk. 45912115Sdyson * 4) invalidate all inactive vnodes. 46012115Sdyson * 5) invalidate all cached file data. 46112115Sdyson * 6) re-read inode data for all active vnodes. 46212115Sdyson */ 46312911Sphkstatic int 46412115Sdysonext2_reload(mountp, cred, p) 46512115Sdyson register struct mount *mountp; 46612115Sdyson struct ucred *cred; 46712115Sdyson struct proc *p; 46812115Sdyson{ 46912115Sdyson register struct vnode *vp, *nvp, *devvp; 47012115Sdyson struct inode *ip; 47112115Sdyson struct buf *bp; 47212115Sdyson struct ext2_super_block * es; 47312115Sdyson struct ext2_sb_info *fs; 47412147Sdyson int error; 47512115Sdyson 47612115Sdyson if ((mountp->mnt_flag & MNT_RDONLY) == 0) 47712115Sdyson return (EINVAL); 47812115Sdyson /* 47912115Sdyson * Step 1: invalidate all cached meta-data. 48012115Sdyson */ 48112115Sdyson devvp = VFSTOUFS(mountp)->um_devvp; 48212115Sdyson if (vinvalbuf(devvp, 0, cred, p, 0, 0)) 48312115Sdyson panic("ext2_reload: dirty1"); 48412115Sdyson /* 48512115Sdyson * Step 2: re-read superblock from disk. 48612115Sdyson * constants have been adjusted for ext2 48712115Sdyson */ 48812115Sdyson if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) 48912115Sdyson return (error); 49012115Sdyson es = (struct ext2_super_block *)bp->b_data; 49112115Sdyson if (es->s_magic != EXT2_SUPER_MAGIC) { 49212115Sdyson if(es->s_magic == EXT2_PRE_02B_MAGIC) 49312115Sdyson printf("This filesystem bears the magic number of a pre " 49412115Sdyson "0.2b version of ext2. This is not supported by " 49512115Sdyson "Lites.\n"); 49612115Sdyson else 49712115Sdyson printf("Wrong magic number: %x (expected %x for ext2 fs\n", 49812115Sdyson es->s_magic, EXT2_SUPER_MAGIC); 49912115Sdyson brelse(bp); 50012115Sdyson return (EIO); /* XXX needs translation */ 50112115Sdyson } 50212115Sdyson fs = VFSTOUFS(mountp)->um_e2fs; 50312115Sdyson bcopy(bp->b_data, fs->s_es, sizeof(struct ext2_super_block)); 50412115Sdyson 50512115Sdyson if(error = compute_sb_data(devvp, es, fs)) { 50612115Sdyson brelse(bp); 50712115Sdyson return error; 50812115Sdyson } 50912115Sdyson#ifdef UNKLAR 51012115Sdyson if (fs->fs_sbsize < SBSIZE) 51112115Sdyson bp->b_flags |= B_INVAL; 51212115Sdyson#endif 51312115Sdyson brelse(bp); 51412115Sdyson 51512115Sdysonloop: 51612115Sdyson for (vp = mountp->mnt_vnodelist.lh_first; vp != NULL; vp = nvp) { 51712115Sdyson nvp = vp->v_mntvnodes.le_next; 51812115Sdyson /* 51912115Sdyson * Step 4: invalidate all inactive vnodes. 52012115Sdyson */ 52112115Sdyson if (vp->v_usecount == 0) { 52212115Sdyson vgone(vp); 52312115Sdyson continue; 52412115Sdyson } 52512115Sdyson /* 52612115Sdyson * Step 5: invalidate all cached file data. 52712115Sdyson */ 52822521Sdyson if (vget(vp, LK_EXCLUSIVE, p)) 52912115Sdyson goto loop; 53012115Sdyson if (vinvalbuf(vp, 0, cred, p, 0, 0)) 53112115Sdyson panic("ext2_reload: dirty2"); 53212115Sdyson /* 53312115Sdyson * Step 6: re-read inode data for all active vnodes. 53412115Sdyson */ 53512115Sdyson ip = VTOI(vp); 53612115Sdyson if (error = 53712115Sdyson bread(devvp, fsbtodb(fs, ino_to_fsba(fs, ip->i_number)), 53812115Sdyson (int)fs->s_blocksize, NOCRED, &bp)) { 53912115Sdyson vput(vp); 54012115Sdyson return (error); 54112115Sdyson } 54212115Sdyson ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data + 54312115Sdyson EXT2_INODE_SIZE * ino_to_fsbo(fs, ip->i_number)), 54412115Sdyson &ip->i_din); 54512115Sdyson brelse(bp); 54612115Sdyson vput(vp); 54712115Sdyson if (vp->v_mount != mountp) 54812115Sdyson goto loop; 54912115Sdyson } 55012115Sdyson return (0); 55112115Sdyson} 55212115Sdyson 55312115Sdyson/* 55412115Sdyson * Common code for mount and mountroot 55512115Sdyson */ 55612911Sphkstatic int 55712115Sdysonext2_mountfs(devvp, mp, p) 55812115Sdyson register struct vnode *devvp; 55912115Sdyson struct mount *mp; 56012115Sdyson struct proc *p; 56112115Sdyson{ 56212115Sdyson register struct ufsmount *ump; 56312115Sdyson struct buf *bp; 56412115Sdyson register struct ext2_sb_info *fs; 56512115Sdyson struct ext2_super_block * es; 56612115Sdyson dev_t dev = devvp->v_rdev; 56712115Sdyson struct partinfo dpart; 56812115Sdyson int havepart = 0; 56912115Sdyson int error, i, size; 57012115Sdyson int ronly; 57112115Sdyson#if !defined(__FreeBSD__) 57212115Sdyson extern struct vnode *rootvp; 57312115Sdyson#endif 57412115Sdyson 57512115Sdyson /* 57612115Sdyson * Disallow multiple mounts of the same device. 57712115Sdyson * Disallow mounting of a device that is currently in use 57812115Sdyson * (except for root, which might share swap device for miniroot). 57912115Sdyson * Flush out any old buffers remaining from a previous use. 58012115Sdyson */ 58112115Sdyson if (error = vfs_mountedon(devvp)) 58212115Sdyson return (error); 58312115Sdyson if (vcount(devvp) > 1 && devvp != rootvp) 58412115Sdyson return (EBUSY); 58512115Sdyson if (error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) 58612115Sdyson return (error); 58712115Sdyson#ifdef READONLY 58812115Sdyson/* turn on this to force it to be read-only */ 58912115Sdyson mp->mnt_flag |= MNT_RDONLY; 59012115Sdyson#endif 59112115Sdyson 59212115Sdyson ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 59312115Sdyson if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p)) 59412115Sdyson return (error); 59512115Sdyson if (VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD, NOCRED, p) != 0) 59612115Sdyson size = DEV_BSIZE; 59712115Sdyson else { 59812115Sdyson havepart = 1; 59912115Sdyson size = dpart.disklab->d_secsize; 60012115Sdyson } 60112115Sdyson 60212115Sdyson bp = NULL; 60312115Sdyson ump = NULL; 60412115Sdyson if (error = bread(devvp, SBLOCK, SBSIZE, NOCRED, &bp)) 60512115Sdyson goto out; 60612115Sdyson es = (struct ext2_super_block *)bp->b_data; 60712115Sdyson if (es->s_magic != EXT2_SUPER_MAGIC) { 60812115Sdyson if(es->s_magic == EXT2_PRE_02B_MAGIC) 60912115Sdyson printf("This filesystem bears the magic number of a pre " 61012115Sdyson "0.2b version of ext2. This is not supported by " 61112115Sdyson "Lites.\n"); 61212115Sdyson else 61312115Sdyson printf("Wrong magic number: %x (expected %x for EXT2FS)\n", 61412115Sdyson es->s_magic, EXT2_SUPER_MAGIC); 61512115Sdyson error = EINVAL; /* XXX needs translation */ 61612115Sdyson goto out; 61712115Sdyson } 61812115Sdyson ump = bsd_malloc(sizeof *ump, M_UFSMNT, M_WAITOK); 61912115Sdyson bzero((caddr_t)ump, sizeof *ump); 62012115Sdyson /* I don't know whether this is the right strategy. Note that 62112115Sdyson we dynamically allocate both a ext2_sb_info and a ext2_super_block 62212115Sdyson while Linux keeps the super block in a locked buffer 62312115Sdyson */ 62412115Sdyson ump->um_e2fs = bsd_malloc(sizeof(struct ext2_sb_info), 62512115Sdyson M_UFSMNT, M_WAITOK); 62612115Sdyson ump->um_e2fs->s_es = bsd_malloc(sizeof(struct ext2_super_block), 62712115Sdyson M_UFSMNT, M_WAITOK); 62812115Sdyson bcopy(es, ump->um_e2fs->s_es, (u_int)sizeof(struct ext2_super_block)); 62912115Sdyson if(error = compute_sb_data(devvp, ump->um_e2fs->s_es, ump->um_e2fs)) { 63012115Sdyson brelse(bp); 63112115Sdyson return error; 63212115Sdyson } 63312115Sdyson brelse(bp); 63412115Sdyson bp = NULL; 63512115Sdyson fs = ump->um_e2fs; 63612115Sdyson fs->s_rd_only = ronly; /* ronly is set according to mnt_flags */ 63712115Sdyson if (!(fs->s_es->s_state & EXT2_VALID_FS)) { 63812115Sdyson printf("WARNING: %s was not properly dismounted\n", 63912115Sdyson fs->fs_fsmnt); 64012115Sdyson } 64112115Sdyson /* if the fs is not mounted read-only, make sure the super block is 64212115Sdyson always written back on a sync() 64312115Sdyson */ 64412115Sdyson if (ronly == 0) { 64512115Sdyson fs->s_dirt = 1; /* mark it modified */ 64612115Sdyson fs->s_es->s_state &= ~EXT2_VALID_FS; /* set fs invalid */ 64712115Sdyson } 64812115Sdyson mp->mnt_data = (qaddr_t)ump; 64912115Sdyson mp->mnt_stat.f_fsid.val[0] = (long)dev; 65012115Sdyson mp->mnt_stat.f_fsid.val[1] = MOUNT_EXT2FS; 65112115Sdyson mp->mnt_maxsymlinklen = EXT2_MAXSYMLINKLEN; 65212115Sdyson mp->mnt_flag |= MNT_LOCAL; 65312115Sdyson ump->um_mountp = mp; 65412115Sdyson ump->um_dev = dev; 65512115Sdyson ump->um_devvp = devvp; 65612115Sdyson /* setting those two parameters allows us to use 65712115Sdyson ufs_bmap w/o changse ! 65812115Sdyson */ 65912115Sdyson ump->um_nindir = EXT2_ADDR_PER_BLOCK(fs); 66012115Sdyson ump->um_bptrtodb = fs->s_es->s_log_block_size + 1; 66112115Sdyson ump->um_seqinc = EXT2_FRAGS_PER_BLOCK(fs); 66212115Sdyson for (i = 0; i < MAXQUOTAS; i++) 66312115Sdyson ump->um_quotas[i] = NULLVP; 66412115Sdyson devvp->v_specflags |= SI_MOUNTEDON; 66512115Sdyson if (ronly == 0) 66612115Sdyson ext2_sbupdate(ump, MNT_WAIT); 66712115Sdyson return (0); 66812115Sdysonout: 66912115Sdyson if (bp) 67012115Sdyson brelse(bp); 67112115Sdyson (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); 67212115Sdyson if (ump) { 67312115Sdyson bsd_free(ump->um_fs, M_UFSMNT); 67412115Sdyson bsd_free(ump, M_UFSMNT); 67512115Sdyson mp->mnt_data = (qaddr_t)0; 67612115Sdyson } 67712115Sdyson return (error); 67812115Sdyson} 67912115Sdyson 68012115Sdyson/* 68112115Sdyson * unmount system call 68212115Sdyson */ 68312911Sphkstatic int 68412115Sdysonext2_unmount(mp, mntflags, p) 68512115Sdyson struct mount *mp; 68612115Sdyson int mntflags; 68712115Sdyson struct proc *p; 68812115Sdyson{ 68912115Sdyson register struct ufsmount *ump; 69012115Sdyson register struct ext2_sb_info *fs; 69112115Sdyson int error, flags, ronly, i; 69212115Sdyson 69312115Sdyson flags = 0; 69412115Sdyson if (mntflags & MNT_FORCE) { 69512115Sdyson if (mp->mnt_flag & MNT_ROOTFS) 69612115Sdyson return (EINVAL); 69712115Sdyson flags |= FORCECLOSE; 69812115Sdyson } 69912115Sdyson if (error = ext2_flushfiles(mp, flags, p)) 70012115Sdyson return (error); 70112115Sdyson ump = VFSTOUFS(mp); 70212115Sdyson fs = ump->um_e2fs; 70312115Sdyson ronly = fs->s_rd_only; 70412115Sdyson if (!ronly) { 70512115Sdyson fs->s_es->s_state |= EXT2_VALID_FS; /* was fs_clean = 1 */ 70612115Sdyson ext2_sbupdate(ump, MNT_WAIT); 70712115Sdyson } 70827881Sdyson 70912115Sdyson /* release buffers containing group descriptors */ 71012115Sdyson for(i = 0; i < fs->s_db_per_group; i++) 71127881Sdyson ULCK_BUF(fs->s_group_desc[i]) 71227881Sdyson 71312115Sdyson /* release cached inode/block bitmaps */ 71412115Sdyson for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) 71512115Sdyson if (fs->s_inode_bitmap[i]) 71627881Sdyson ULCK_BUF(fs->s_inode_bitmap[i]) 71727881Sdyson 71812115Sdyson for (i = 0; i < EXT2_MAX_GROUP_LOADED; i++) 71912115Sdyson if (fs->s_block_bitmap[i]) 72027881Sdyson ULCK_BUF(fs->s_block_bitmap[i]) 72112115Sdyson 72212115Sdyson ump->um_devvp->v_specflags &= ~SI_MOUNTEDON; 72312115Sdyson error = VOP_CLOSE(ump->um_devvp, ronly ? FREAD : FREAD|FWRITE, 72412115Sdyson NOCRED, p); 72512115Sdyson vrele(ump->um_devvp); 72612115Sdyson bsd_free(fs->s_es, M_UFSMNT); 72712115Sdyson bsd_free(fs, M_UFSMNT); 72812115Sdyson bsd_free(ump, M_UFSMNT); 72912115Sdyson mp->mnt_data = (qaddr_t)0; 73012115Sdyson mp->mnt_flag &= ~MNT_LOCAL; 73112115Sdyson return (error); 73212115Sdyson} 73312115Sdyson 73412115Sdyson/* 73512115Sdyson * Flush out all the files in a filesystem. 73612115Sdyson */ 73712911Sphkstatic int 73812115Sdysonext2_flushfiles(mp, flags, p) 73912115Sdyson register struct mount *mp; 74012115Sdyson int flags; 74112115Sdyson struct proc *p; 74212115Sdyson{ 74312115Sdyson register struct ufsmount *ump; 74412147Sdyson int error; 74512746Sbde#if QUOTA 74612746Sbde int i; 74712746Sbde#endif 74812115Sdyson 74912115Sdyson ump = VFSTOUFS(mp); 75012115Sdyson#if QUOTA 75112115Sdyson if (mp->mnt_flag & MNT_QUOTA) { 75212115Sdyson if (error = vflush(mp, NULLVP, SKIPSYSTEM|flags)) 75312115Sdyson return (error); 75412115Sdyson for (i = 0; i < MAXQUOTAS; i++) { 75512115Sdyson if (ump->um_quotas[i] == NULLVP) 75612115Sdyson continue; 75712115Sdyson quotaoff(p, mp, i); 75812115Sdyson } 75912115Sdyson /* 76012115Sdyson * Here we fall through to vflush again to ensure 76112115Sdyson * that we have gotten rid of all the system vnodes. 76212115Sdyson */ 76312115Sdyson } 76412115Sdyson#endif 76512115Sdyson error = vflush(mp, NULLVP, flags); 76612115Sdyson return (error); 76712115Sdyson} 76812115Sdyson 76912115Sdyson/* 77012115Sdyson * Get file system statistics. 77112115Sdyson * taken from ext2/super.c ext2_statfs 77212115Sdyson */ 77312911Sphkstatic int 77412115Sdysonext2_statfs(mp, sbp, p) 77512115Sdyson struct mount *mp; 77612115Sdyson register struct statfs *sbp; 77712115Sdyson struct proc *p; 77812115Sdyson{ 77912115Sdyson unsigned long overhead; 78012115Sdyson unsigned long overhead_per_group; 78112115Sdyson 78212115Sdyson register struct ufsmount *ump; 78312115Sdyson register struct ext2_sb_info *fs; 78412115Sdyson register struct ext2_super_block *es; 78512115Sdyson 78612115Sdyson ump = VFSTOUFS(mp); 78712115Sdyson fs = ump->um_e2fs; 78812115Sdyson es = fs->s_es; 78912115Sdyson 79012115Sdyson if (es->s_magic != EXT2_SUPER_MAGIC) 79112115Sdyson panic("ext2_statfs - magic number spoiled"); 79212115Sdyson 79312115Sdyson /* 79412115Sdyson * Compute the overhead (FS structures) 79512115Sdyson */ 79612115Sdyson overhead_per_group = 1 /* super block */ + 79712115Sdyson fs->s_db_per_group + 79812115Sdyson 1 /* block bitmap */ + 79912115Sdyson 1 /* inode bitmap */ + 80012115Sdyson fs->s_itb_per_group; 80112115Sdyson overhead = es->s_first_data_block + 80212115Sdyson fs->s_groups_count * overhead_per_group; 80312115Sdyson 80412115Sdyson sbp->f_type = MOUNT_EXT2FS; 80512115Sdyson sbp->f_bsize = EXT2_FRAG_SIZE(fs); 80612115Sdyson sbp->f_iosize = EXT2_BLOCK_SIZE(fs); 80712115Sdyson sbp->f_blocks = es->s_blocks_count - overhead; 80812115Sdyson sbp->f_bfree = es->s_free_blocks_count; 80912115Sdyson sbp->f_bavail = sbp->f_bfree - es->s_r_blocks_count; 81012115Sdyson sbp->f_files = es->s_inodes_count; 81112115Sdyson sbp->f_ffree = es->s_free_inodes_count; 81212115Sdyson if (sbp != &mp->mnt_stat) { 81312115Sdyson bcopy((caddr_t)mp->mnt_stat.f_mntonname, 81412115Sdyson (caddr_t)&sbp->f_mntonname[0], MNAMELEN); 81512115Sdyson bcopy((caddr_t)mp->mnt_stat.f_mntfromname, 81612115Sdyson (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); 81712115Sdyson } 81812115Sdyson return (0); 81912115Sdyson} 82012115Sdyson 82112115Sdyson/* 82212115Sdyson * Go through the disk queues to initiate sandbagged IO; 82312115Sdyson * go through the inodes to write those that have been modified; 82412115Sdyson * initiate the writing of the super block if it has been modified. 82512115Sdyson * 82612115Sdyson * Note: we are always called with the filesystem marked `MPBUSY'. 82712115Sdyson */ 82812911Sphkstatic int 82912115Sdysonext2_sync(mp, waitfor, cred, p) 83012115Sdyson struct mount *mp; 83112115Sdyson int waitfor; 83212115Sdyson struct ucred *cred; 83312115Sdyson struct proc *p; 83412115Sdyson{ 83512115Sdyson register struct vnode *vp; 83612115Sdyson register struct inode *ip; 83712115Sdyson register struct ufsmount *ump = VFSTOUFS(mp); 83812115Sdyson register struct ext2_sb_info *fs; 83912115Sdyson int error, allerror = 0; 84012115Sdyson 84112115Sdyson fs = ump->um_e2fs; 84212115Sdyson /* 84312115Sdyson * Write back modified superblock. 84412115Sdyson * Consistency check that the superblock 84512115Sdyson * is still in the buffer cache. 84612115Sdyson */ 84712115Sdyson if (fs->s_dirt) { 84812115Sdyson#if !defined(__FreeBSD__) 84912115Sdyson struct timeval time; 85012115Sdyson#endif 85112115Sdyson 85212115Sdyson if (fs->s_rd_only != 0) { /* XXX */ 85312115Sdyson printf("fs = %s\n", fs->fs_fsmnt); 85412115Sdyson panic("update: rofs mod"); 85512115Sdyson } 85612115Sdyson fs->s_dirt = 0; 85712115Sdyson#if !defined(__FreeBSD__) 85812115Sdyson get_time(&time); 85912115Sdyson#endif 86012115Sdyson fs->s_es->s_wtime = time.tv_sec; 86112115Sdyson allerror = ext2_sbupdate(ump, waitfor); 86212115Sdyson } 86312115Sdyson /* 86412115Sdyson * Write back each (modified) inode. 86512115Sdyson */ 86612115Sdysonloop: 86712115Sdyson for (vp = mp->mnt_vnodelist.lh_first; 86812115Sdyson vp != NULL; 86912115Sdyson vp = vp->v_mntvnodes.le_next) { 87012115Sdyson /* 87112115Sdyson * If the vnode that we are about to sync is no longer 87212115Sdyson * associated with this mount point, start over. 87312115Sdyson */ 87412115Sdyson if (vp->v_mount != mp) 87512115Sdyson goto loop; 87612115Sdyson if (VOP_ISLOCKED(vp)) 87712115Sdyson continue; 87812115Sdyson ip = VTOI(vp); 87912115Sdyson if ((ip->i_flag & 88012115Sdyson (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0 && 88112115Sdyson vp->v_dirtyblkhd.lh_first == NULL) 88212115Sdyson continue; 88322521Sdyson if (vget(vp, LK_EXCLUSIVE, p)) 88412115Sdyson goto loop; 88512115Sdyson if (error = VOP_FSYNC(vp, cred, waitfor, p)) 88612115Sdyson allerror = error; 88712115Sdyson vput(vp); 88812115Sdyson } 88912115Sdyson /* 89012115Sdyson * Force stale file system control information to be flushed. 89112115Sdyson */ 89212115Sdyson if (error = VOP_FSYNC(ump->um_devvp, cred, waitfor, p)) 89312115Sdyson allerror = error; 89412115Sdyson#if QUOTA 89512115Sdyson qsync(mp); 89612115Sdyson#endif 89712115Sdyson return (allerror); 89812115Sdyson} 89912115Sdyson 90012115Sdyson/* 90112115Sdyson * Look up a EXT2FS dinode number to find its incore vnode, otherwise read it 90212115Sdyson * in from disk. If it is in core, wait for the lock bit to clear, then 90312115Sdyson * return the inode locked. Detection and handling of mount points must be 90412115Sdyson * done by the calling routine. 90512115Sdyson */ 90612911Sphkstatic int 90712115Sdysonext2_vget(mp, ino, vpp) 90812115Sdyson struct mount *mp; 90912115Sdyson ino_t ino; 91012115Sdyson struct vnode **vpp; 91112115Sdyson{ 91212115Sdyson register struct ext2_sb_info *fs; 91312115Sdyson register struct inode *ip; 91412115Sdyson struct ufsmount *ump; 91512115Sdyson struct buf *bp; 91612115Sdyson struct vnode *vp; 91712115Sdyson dev_t dev; 91812115Sdyson int i, type, error; 91912115Sdyson int used_blocks; 92012115Sdyson 92112115Sdyson ump = VFSTOUFS(mp); 92212115Sdyson dev = ump->um_dev; 92312406Sdysonrestart: 92412115Sdyson if ((*vpp = ufs_ihashget(dev, ino)) != NULL) 92512115Sdyson return (0); 92612115Sdyson 92712406Sdyson#ifdef __FreeBSD__ 92812406Sdyson /* 92912406Sdyson * Lock out the creation of new entries in the FFS hash table in 93012406Sdyson * case getnewvnode() or MALLOC() blocks, otherwise a duplicate 93112406Sdyson * may occur! 93212406Sdyson */ 93312406Sdyson if (ext2fs_inode_hash_lock) { 93412406Sdyson while (ext2fs_inode_hash_lock) { 93512406Sdyson ext2fs_inode_hash_lock = -1; 93612406Sdyson tsleep(&ext2fs_inode_hash_lock, PVM, "ffsvgt", 0); 93712406Sdyson } 93812406Sdyson goto restart; 93912406Sdyson } 94012406Sdyson ext2fs_inode_hash_lock = 1; 94112406Sdyson#endif 94212406Sdyson 94312115Sdyson /* Allocate a new vnode/inode. */ 94412115Sdyson if (error = getnewvnode(VT_UFS, mp, ext2_vnodeop_p, &vp)) { 94512115Sdyson *vpp = NULL; 94612115Sdyson return (error); 94712115Sdyson } 94812115Sdyson /* I don't really know what this 'type' does. I suppose it's some kind 94912115Sdyson * of memory accounting. Let's just book this memory on FFS's account 95012115Sdyson * If I'm not mistaken, this stuff isn't implemented anyway in Lites 95112115Sdyson */ 95212115Sdyson type = ump->um_devvp->v_tag == VT_MFS ? M_MFSNODE : M_FFSNODE; /* XXX */ 95312115Sdyson MALLOC(ip, struct inode *, sizeof(struct inode), type, M_WAITOK); 95412406Sdyson#ifndef __FreeBSD__ 95512115Sdyson insmntque(vp, mp); 95612406Sdyson#endif 95712115Sdyson bzero((caddr_t)ip, sizeof(struct inode)); 95812115Sdyson vp->v_data = ip; 95912115Sdyson ip->i_vnode = vp; 96012115Sdyson ip->i_e2fs = fs = ump->um_e2fs; 96112115Sdyson ip->i_dev = dev; 96212115Sdyson ip->i_number = ino; 96312115Sdyson#if QUOTA 96412115Sdyson for (i = 0; i < MAXQUOTAS; i++) 96512115Sdyson ip->i_dquot[i] = NODQUOT; 96612115Sdyson#endif 96712115Sdyson /* 96812115Sdyson * Put it onto its hash chain and lock it so that other requests for 96912115Sdyson * this inode will block if they arrive while we are sleeping waiting 97012115Sdyson * for old data structures to be purged or for the contents of the 97112115Sdyson * disk portion of this inode to be read. 97212115Sdyson */ 97312115Sdyson ufs_ihashins(ip); 97412115Sdyson 97512406Sdyson#ifdef __FreeBSD__ 97612406Sdyson if (ext2fs_inode_hash_lock < 0) 97712406Sdyson wakeup(&ext2fs_inode_hash_lock); 97812406Sdyson ext2fs_inode_hash_lock = 0; 97912406Sdyson#endif 98012406Sdyson 98112115Sdyson /* Read in the disk contents for the inode, copy into the inode. */ 98212406Sdyson /* Read in the disk contents for the inode, copy into the inode. */ 98312115Sdyson#if 0 98412115Sdysonprintf("ext2_vget(%d) dbn= %d ", ino, fsbtodb(fs, ino_to_fsba(fs, ino))); 98512115Sdyson#endif 98612115Sdyson if (error = bread(ump->um_devvp, fsbtodb(fs, ino_to_fsba(fs, ino)), 98712115Sdyson (int)fs->s_blocksize, NOCRED, &bp)) { 98812115Sdyson /* 98912115Sdyson * The inode does not contain anything useful, so it would 99012115Sdyson * be misleading to leave it on its hash chain. With mode 99112115Sdyson * still zero, it will be unlinked and returned to the free 99212115Sdyson * list by vput(). 99312115Sdyson */ 99412115Sdyson vput(vp); 99512115Sdyson brelse(bp); 99612115Sdyson *vpp = NULL; 99712115Sdyson return (error); 99812115Sdyson } 99912115Sdyson /* convert ext2 inode to dinode */ 100012115Sdyson ext2_ei2di((struct ext2_inode *) ((char *)bp->b_data + EXT2_INODE_SIZE * 100112115Sdyson ino_to_fsbo(fs, ino)), &ip->i_din); 100212115Sdyson ip->i_block_group = ino_to_cg(fs, ino); 100312115Sdyson ip->i_next_alloc_block = 0; 100412115Sdyson ip->i_next_alloc_goal = 0; 100512115Sdyson ip->i_prealloc_count = 0; 100612115Sdyson ip->i_prealloc_block = 0; 100712115Sdyson /* now we want to make sure that block pointers for unused 100812115Sdyson blocks are zeroed out - ext2_balloc depends on this 100912115Sdyson although for regular files and directories only 101012115Sdyson */ 101112115Sdyson if(S_ISDIR(ip->i_mode) || S_ISREG(ip->i_mode)) { 101212115Sdyson used_blocks = (ip->i_size+fs->s_blocksize-1) / fs->s_blocksize; 101312115Sdyson for(i = used_blocks; i < EXT2_NDIR_BLOCKS; i++) 101412115Sdyson ip->i_db[i] = 0; 101512115Sdyson } 101612115Sdyson/* 101712115Sdyson ext2_print_inode(ip); 101812115Sdyson*/ 101912115Sdyson brelse(bp); 102012115Sdyson 102112115Sdyson /* 102212115Sdyson * Initialize the vnode from the inode, check for aliases. 102312115Sdyson * Note that the underlying vnode may have changed. 102412115Sdyson */ 102514249Sbde if (error = ufs_vinit(mp, ext2_specop_p, ext2_fifoop_p, &vp)) { 102612115Sdyson vput(vp); 102712115Sdyson *vpp = NULL; 102812115Sdyson return (error); 102912115Sdyson } 103012115Sdyson /* 103112115Sdyson * Finish inode initialization now that aliasing has been resolved. 103212115Sdyson */ 103312115Sdyson ip->i_devvp = ump->um_devvp; 103412115Sdyson VREF(ip->i_devvp); 103512115Sdyson /* 103612115Sdyson * Set up a generation number for this inode if it does not 103712115Sdyson * already have one. This should only happen on old filesystems. 103812115Sdyson */ 103912115Sdyson if (ip->i_gen == 0) { 104012115Sdyson#if !defined(__FreeBSD__) 104112115Sdyson struct timeval time; 104212115Sdyson get_time(&time); 104312115Sdyson#endif 104412115Sdyson if (++nextgennumber < (u_long)time.tv_sec) 104512115Sdyson nextgennumber = time.tv_sec; 104612115Sdyson ip->i_gen = nextgennumber; 104712115Sdyson if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) 104812115Sdyson ip->i_flag |= IN_MODIFIED; 104912115Sdyson } 105012115Sdyson *vpp = vp; 105112115Sdyson return (0); 105212115Sdyson} 105312115Sdyson 105412115Sdyson/* 105512115Sdyson * File handle to vnode 105612115Sdyson * 105712115Sdyson * Have to be really careful about stale file handles: 105812115Sdyson * - check that the inode number is valid 105912115Sdyson * - call ext2_vget() to get the locked inode 106012115Sdyson * - check for an unallocated inode (i_mode == 0) 106112115Sdyson * - check that the given client host has export rights and return 106212115Sdyson * those rights via. exflagsp and credanonp 106312115Sdyson */ 106412911Sphkstatic int 106512115Sdysonext2_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 106612115Sdyson register struct mount *mp; 106712115Sdyson struct fid *fhp; 106828270Swollman struct sockaddr *nam; 106912115Sdyson struct vnode **vpp; 107012115Sdyson int *exflagsp; 107112115Sdyson struct ucred **credanonp; 107212115Sdyson{ 107312115Sdyson register struct ufid *ufhp; 107412115Sdyson struct ext2_sb_info *fs; 107512115Sdyson 107612115Sdyson ufhp = (struct ufid *)fhp; 107712115Sdyson fs = VFSTOUFS(mp)->um_e2fs; 107812115Sdyson if (ufhp->ufid_ino < ROOTINO || 107912115Sdyson ufhp->ufid_ino >= fs->s_groups_count * fs->s_es->s_inodes_per_group) 108012115Sdyson return (ESTALE); 108112115Sdyson return (ufs_check_export(mp, ufhp, nam, vpp, exflagsp, credanonp)); 108212115Sdyson} 108312115Sdyson 108412115Sdyson/* 108512115Sdyson * Vnode pointer to File handle 108612115Sdyson */ 108712115Sdyson/* ARGSUSED */ 108812911Sphkstatic int 108912115Sdysonext2_vptofh(vp, fhp) 109012115Sdyson struct vnode *vp; 109112115Sdyson struct fid *fhp; 109212115Sdyson{ 109312115Sdyson register struct inode *ip; 109412115Sdyson register struct ufid *ufhp; 109512115Sdyson 109612115Sdyson ip = VTOI(vp); 109712115Sdyson ufhp = (struct ufid *)fhp; 109812115Sdyson ufhp->ufid_len = sizeof(struct ufid); 109912115Sdyson ufhp->ufid_ino = ip->i_number; 110012115Sdyson ufhp->ufid_gen = ip->i_gen; 110112115Sdyson return (0); 110212115Sdyson} 110312115Sdyson 110412115Sdyson/* 110512115Sdyson * Write a superblock and associated information back to disk. 110612115Sdyson */ 110712911Sphkstatic int 110812115Sdysonext2_sbupdate(mp, waitfor) 110912115Sdyson struct ufsmount *mp; 111012115Sdyson int waitfor; 111112115Sdyson{ 111212115Sdyson register struct ext2_sb_info *fs = mp->um_e2fs; 111312115Sdyson register struct ext2_super_block *es = fs->s_es; 111412115Sdyson register struct buf *bp; 111512147Sdyson int i, error = 0; 111612115Sdyson/* 111712115Sdysonprintf("\nupdating superblock, waitfor=%s\n", waitfor == MNT_WAIT ? "yes":"no"); 111812115Sdyson*/ 111912115Sdyson bp = getblk(mp->um_devvp, SBLOCK, SBSIZE, 0, 0); 112012115Sdyson bcopy((caddr_t)es, bp->b_data, (u_int)sizeof(struct ext2_super_block)); 112112115Sdyson if (waitfor == MNT_WAIT) 112212115Sdyson error = bwrite(bp); 112312115Sdyson else 112412115Sdyson bawrite(bp); 112512115Sdyson 112627881Sdyson /* 112727881Sdyson * The buffers for group descriptors, inode bitmaps and block bitmaps 112827881Sdyson * are not busy at this point and are (hopefully) written by the 112927881Sdyson * usual sync mechanism. No need to write them here 113012115Sdyson */ 113112115Sdyson 113212115Sdyson return (error); 113312115Sdyson} 1134