1129 lines
30 KiB
C
1129 lines
30 KiB
C
/*-
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* Copyright 2000 Hans Reiser
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* See README for licensing and copyright details
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*
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* Ported to FreeBSD by Jean-Sébastien Pédron <jspedron@club-internet.fr>
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*
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* $FreeBSD$
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*/
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#include <gnu/fs/reiserfs/reiserfs_fs.h>
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const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
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const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
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const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
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/*
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* Default recommended I/O size is 128k. There might be broken
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* applications that are confused by this. Use nolargeio mount option to
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* get usual i/o size = PAGE_SIZE.
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*/
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int reiserfs_default_io_size = 128 * 1024;
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static vfs_cmount_t reiserfs_cmount;
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static vfs_fhtovp_t reiserfs_fhtovp;
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static vfs_mount_t reiserfs_mount;
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static vfs_root_t reiserfs_root;
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static vfs_statfs_t reiserfs_statfs;
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static vfs_unmount_t reiserfs_unmount;
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static int reiserfs_mountfs(struct vnode *devvp, struct mount *mp,
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struct thread *td);
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static void load_bitmap_info_data(struct reiserfs_sb_info *sbi,
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struct reiserfs_bitmap_info *bi);
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static int read_bitmaps(struct reiserfs_mount *rmp);
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static int read_old_bitmaps(struct reiserfs_mount *rmp);
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static int read_super_block(struct reiserfs_mount *rmp, int offset);
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static hashf_t hash_function(struct reiserfs_mount *rmp);
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static int get_root_node(struct reiserfs_mount *rmp,
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struct reiserfs_node **root);
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uint32_t find_hash_out(struct reiserfs_mount *rmp);
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MALLOC_DEFINE(M_REISERFSMNT, "reiserfs_mount", "ReiserFS mount structure");
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MALLOC_DEFINE(M_REISERFSPATH, "reiserfs_path", "ReiserFS path structure");
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MALLOC_DEFINE(M_REISERFSNODE, "reiserfs_node", "ReiserFS vnode private part");
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/* -------------------------------------------------------------------
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* VFS operations
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* -------------------------------------------------------------------*/
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static int
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reiserfs_cmount(struct mntarg *ma, void *data, int flags)
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{
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struct reiserfs_args args;
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struct export_args exp;
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int error;
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error = copyin(data, &args, sizeof(args));
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if (error)
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return (error);
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vfs_oexport_conv(&args.export, &exp);
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ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
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ma = mount_arg(ma, "export", &exp, sizeof(exp));
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error = kernel_mount(ma, flags);
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return (error);
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}
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/*
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* Mount system call
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*/
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static int
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reiserfs_mount(struct mount *mp)
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{
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size_t size;
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int error, len;
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accmode_t accmode;
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char *path, *fspec;
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struct vnode *devvp;
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struct vfsoptlist *opts;
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struct reiserfs_mount *rmp;
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struct reiserfs_sb_info *sbi;
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struct nameidata nd, *ndp = &nd;
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struct thread *td;
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td = curthread;
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if (!(mp->mnt_flag & MNT_RDONLY))
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return EROFS;
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/* Get the new options passed to mount */
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opts = mp->mnt_optnew;
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/* `fspath' contains the mount point (eg. /mnt/linux); REQUIRED */
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vfs_getopt(opts, "fspath", (void **)&path, NULL);
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reiserfs_log(LOG_INFO, "mount point is `%s'\n", path);
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/* `from' contains the device name (eg. /dev/ad0s1); REQUIRED */
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fspec = NULL;
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error = vfs_getopt(opts, "from", (void **)&fspec, &len);
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if (!error && fspec[len - 1] != '\0')
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return (EINVAL);
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reiserfs_log(LOG_INFO, "device is `%s'\n", fspec);
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/* Handle MNT_UPDATE (mp->mnt_flag) */
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if (mp->mnt_flag & MNT_UPDATE) {
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/* For now, only NFS export is supported. */
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if (vfs_flagopt(opts, "export", NULL, 0))
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return (0);
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}
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/* Not an update, or updating the name: look up the name
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* and verify that it refers to a sensible disk device. */
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if (fspec == NULL)
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return (EINVAL);
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NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td);
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if ((error = namei(ndp)) != 0)
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return (error);
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NDFREE(ndp, NDF_ONLY_PNBUF);
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devvp = ndp->ni_vp;
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if (!vn_isdisk(devvp, &error)) {
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vput(devvp);
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return (error);
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}
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/* If mount by non-root, then verify that user has necessary
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* permissions on the device. */
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accmode = VREAD;
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if ((mp->mnt_flag & MNT_RDONLY) == 0)
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accmode |= VWRITE;
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error = VOP_ACCESS(devvp, accmode, td->td_ucred, td);
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if (error)
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error = priv_check(td, PRIV_VFS_MOUNT_PERM);
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if (error) {
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vput(devvp);
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return (error);
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}
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if ((mp->mnt_flag & MNT_UPDATE) == 0) {
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error = reiserfs_mountfs(devvp, mp, td);
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} else {
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/* TODO Handle MNT_UPDATE */
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vput(devvp);
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return (EOPNOTSUPP);
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}
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if (error) {
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vrele(devvp);
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return (error);
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}
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rmp = VFSTOREISERFS(mp);
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sbi = rmp->rm_reiserfs;
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/*
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* Note that this strncpy() is ok because of a check at the start
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* of reiserfs_mount().
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*/
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reiserfs_log(LOG_DEBUG, "prepare statfs data\n");
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(void)copystr(fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
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bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
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(void)reiserfs_statfs(mp, &mp->mnt_stat);
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reiserfs_log(LOG_DEBUG, "done\n");
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return (0);
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}
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/*
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* Unmount system call
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*/
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static int
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reiserfs_unmount(struct mount *mp, int mntflags)
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{
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int error, flags = 0;
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struct reiserfs_mount *rmp;
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struct reiserfs_sb_info *sbi;
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reiserfs_log(LOG_DEBUG, "get private data\n");
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rmp = VFSTOREISERFS(mp);
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sbi = rmp->rm_reiserfs;
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/* Flangs handling */
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reiserfs_log(LOG_DEBUG, "handle mntflags\n");
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if (mntflags & MNT_FORCE)
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flags |= FORCECLOSE;
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/* Flush files -> vflush */
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reiserfs_log(LOG_DEBUG, "flush vnodes\n");
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if ((error = vflush(mp, 0, flags, curthread)))
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return (error);
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/* XXX Super block update */
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if (sbi) {
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if (SB_AP_BITMAP(sbi)) {
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int i;
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reiserfs_log(LOG_DEBUG,
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"release bitmap buffers (total: %d)\n",
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SB_BMAP_NR(sbi));
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for (i = 0; i < SB_BMAP_NR(sbi); i++) {
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if (SB_AP_BITMAP(sbi)[i].bp_data) {
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free(SB_AP_BITMAP(sbi)[i].bp_data,
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M_REISERFSMNT);
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SB_AP_BITMAP(sbi)[i].bp_data = NULL;
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}
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}
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reiserfs_log(LOG_DEBUG, "free bitmaps structure\n");
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free(SB_AP_BITMAP(sbi), M_REISERFSMNT);
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SB_AP_BITMAP(sbi) = NULL;
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}
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if (sbi->s_rs) {
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reiserfs_log(LOG_DEBUG, "free super block data\n");
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free(sbi->s_rs, M_REISERFSMNT);
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sbi->s_rs = NULL;
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}
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}
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reiserfs_log(LOG_DEBUG, "close device\n");
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#if defined(si_mountpoint)
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rmp->rm_devvp->v_rdev->si_mountpoint = NULL;
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#endif
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DROP_GIANT();
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g_topology_lock();
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g_wither_geom_close(rmp->rm_cp->geom, ENXIO);
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g_topology_unlock();
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PICKUP_GIANT();
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vrele(rmp->rm_devvp);
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if (sbi) {
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reiserfs_log(LOG_DEBUG, "free sbi\n");
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free(sbi, M_REISERFSMNT);
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sbi = rmp->rm_reiserfs = NULL;
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}
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if (rmp) {
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reiserfs_log(LOG_DEBUG, "free rmp\n");
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free(rmp, M_REISERFSMNT);
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rmp = NULL;
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}
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mp->mnt_data = 0;
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MNT_ILOCK(mp);
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mp->mnt_flag &= ~MNT_LOCAL;
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MNT_IUNLOCK(mp);
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reiserfs_log(LOG_DEBUG, "done\n");
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return (error);
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}
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/*
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* Return the root of a filesystem.
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*/
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static int
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reiserfs_root(struct mount *mp, int flags, struct vnode **vpp)
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{
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int error;
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struct vnode *vp;
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struct cpu_key rootkey;
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rootkey.on_disk_key.k_dir_id = REISERFS_ROOT_PARENT_OBJECTID;
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rootkey.on_disk_key.k_objectid = REISERFS_ROOT_OBJECTID;
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error = reiserfs_iget(mp, &rootkey, &vp, curthread);
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if (error == 0)
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*vpp = vp;
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return (error);
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}
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/*
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* The statfs syscall
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*/
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static int
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reiserfs_statfs(struct mount *mp, struct statfs *sbp)
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{
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struct reiserfs_mount *rmp;
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struct reiserfs_sb_info *sbi;
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struct reiserfs_super_block *rs;
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reiserfs_log(LOG_DEBUG, "get private data\n");
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rmp = VFSTOREISERFS(mp);
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sbi = rmp->rm_reiserfs;
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rs = sbi->s_rs;
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reiserfs_log(LOG_DEBUG, "fill statfs structure\n");
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sbp->f_bsize = sbi->s_blocksize;
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sbp->f_iosize = sbp->f_bsize;
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sbp->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
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sbp->f_bfree = sb_free_blocks(rs);
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sbp->f_bavail = sbp->f_bfree;
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sbp->f_files = 0;
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sbp->f_ffree = 0;
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reiserfs_log(LOG_DEBUG, " block size = %ju\n",
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(intmax_t)sbp->f_bsize);
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reiserfs_log(LOG_DEBUG, " IO size = %ju\n",
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(intmax_t)sbp->f_iosize);
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reiserfs_log(LOG_DEBUG, " block count = %ju\n",
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(intmax_t)sbp->f_blocks);
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reiserfs_log(LOG_DEBUG, " free blocks = %ju\n",
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(intmax_t)sbp->f_bfree);
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reiserfs_log(LOG_DEBUG, " avail blocks = %ju\n",
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(intmax_t)sbp->f_bavail);
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reiserfs_log(LOG_DEBUG, "...done\n");
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if (sbp != &mp->mnt_stat) {
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reiserfs_log(LOG_DEBUG, "copying monut point info\n");
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sbp->f_type = mp->mnt_vfc->vfc_typenum;
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bcopy((caddr_t)mp->mnt_stat.f_mntonname,
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(caddr_t)&sbp->f_mntonname[0], MNAMELEN);
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bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
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(caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
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reiserfs_log(LOG_DEBUG, " mount from: %s\n",
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sbp->f_mntfromname);
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reiserfs_log(LOG_DEBUG, " mount on: %s\n",
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sbp->f_mntonname);
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reiserfs_log(LOG_DEBUG, "...done\n");
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}
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return (0);
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}
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/*
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* File handle to vnode
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*
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* Have to be really careful about stale file handles:
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* - check that the inode key is valid
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* - call ffs_vget() to get the locked inode
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* - check for an unallocated inode (i_mode == 0)
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* - check that the given client host has export rights and return
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* those rights via. exflagsp and credanonp
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*/
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static int
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reiserfs_fhtovp(struct mount *mp, struct fid *fhp, int flags,
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struct vnode **vpp)
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{
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int error;
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struct rfid *rfhp;
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struct vnode *nvp;
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struct cpu_key key;
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struct reiserfs_node *ip;
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struct reiserfs_sb_info *sbi;
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struct thread *td = curthread;
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rfhp = (struct rfid *)fhp;
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sbi = VFSTOREISERFS(mp)->rm_reiserfs;
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/* Check that the key is valid */
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if (rfhp->rfid_dirid < REISERFS_ROOT_PARENT_OBJECTID &&
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rfhp->rfid_objectid < REISERFS_ROOT_OBJECTID)
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return (ESTALE);
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reiserfs_log(LOG_DEBUG,
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"file handle key is (dirid=%d, objectid=%d)\n",
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rfhp->rfid_dirid, rfhp->rfid_objectid);
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key.on_disk_key.k_dir_id = rfhp->rfid_dirid;
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key.on_disk_key.k_objectid = rfhp->rfid_objectid;
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reiserfs_log(LOG_DEBUG, "read this inode\n");
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error = reiserfs_iget(mp, &key, &nvp, td);
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if (error) {
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*vpp = NULLVP;
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return (error);
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}
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reiserfs_log(LOG_DEBUG, "check validity\n");
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ip = VTOI(nvp);
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if (ip->i_mode == 0 || ip->i_generation != rfhp->rfid_gen) {
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vput(nvp);
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*vpp = NULLVP;
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return (ESTALE);
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}
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reiserfs_log(LOG_DEBUG, "return it\n");
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*vpp = nvp;
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return (0);
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}
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/* -------------------------------------------------------------------
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* Functions for the journal
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* -------------------------------------------------------------------*/
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int
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is_reiserfs_3_5(struct reiserfs_super_block *rs)
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{
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return (!strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
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strlen(reiserfs_3_5_magic_string)));
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}
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int
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is_reiserfs_3_6(struct reiserfs_super_block *rs)
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{
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return (!strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
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strlen(reiserfs_3_6_magic_string)));
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}
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int
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is_reiserfs_jr(struct reiserfs_super_block *rs)
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{
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return (!strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
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strlen(reiserfs_jr_magic_string)));
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}
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static int
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is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
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{
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return ((is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
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is_reiserfs_jr(rs)));
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}
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|
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/* -------------------------------------------------------------------
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* Internal functions
|
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* -------------------------------------------------------------------*/
|
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|
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/*
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* Common code for mount and mountroot
|
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*/
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static int
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reiserfs_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td)
|
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{
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int error, old_format = 0;
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struct reiserfs_mount *rmp;
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struct reiserfs_sb_info *sbi;
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struct reiserfs_super_block *rs;
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struct cdev *dev = devvp->v_rdev;
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struct g_consumer *cp;
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struct bufobj *bo;
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//ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
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DROP_GIANT();
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g_topology_lock();
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error = g_vfs_open(devvp, &cp, "reiserfs", /* read-only */ 0);
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g_topology_unlock();
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PICKUP_GIANT();
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VOP_UNLOCK(devvp, 0);
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if (error)
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return (error);
|
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|
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bo = &devvp->v_bufobj;
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bo->bo_private = cp;
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bo->bo_ops = g_vfs_bufops;
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|
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if (devvp->v_rdev->si_iosize_max != 0)
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mp->mnt_iosize_max = devvp->v_rdev->si_iosize_max;
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if (mp->mnt_iosize_max > MAXPHYS)
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mp->mnt_iosize_max = MAXPHYS;
|
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|
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rmp = NULL;
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sbi = NULL;
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|
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/* rmp contains any information about this specific mount */
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rmp = malloc(sizeof *rmp, M_REISERFSMNT, M_WAITOK | M_ZERO);
|
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if (!rmp) {
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error = (ENOMEM);
|
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goto out;
|
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}
|
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sbi = malloc(sizeof *sbi, M_REISERFSMNT, M_WAITOK | M_ZERO);
|
|
if (!sbi) {
|
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error = (ENOMEM);
|
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goto out;
|
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}
|
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rmp->rm_reiserfs = sbi;
|
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rmp->rm_mountp = mp;
|
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rmp->rm_devvp = devvp;
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rmp->rm_dev = dev;
|
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rmp->rm_bo = &devvp->v_bufobj;
|
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rmp->rm_cp = cp;
|
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|
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/* Set default values for options: non-aggressive tails */
|
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REISERFS_SB(sbi)->s_mount_opt = (1 << REISERFS_SMALLTAIL);
|
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REISERFS_SB(sbi)->s_rd_only = 1;
|
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REISERFS_SB(sbi)->s_devvp = devvp;
|
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|
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/* Read the super block */
|
|
if ((error = read_super_block(rmp, REISERFS_OLD_DISK_OFFSET)) == 0) {
|
|
/* The read process succeeded, it's an old format */
|
|
old_format = 1;
|
|
} else if ((error = read_super_block(rmp, REISERFS_DISK_OFFSET)) != 0) {
|
|
reiserfs_log(LOG_ERR, "can not find a ReiserFS filesystem\n");
|
|
goto out;
|
|
}
|
|
|
|
rs = SB_DISK_SUPER_BLOCK(sbi);
|
|
|
|
/*
|
|
* Let's do basic sanity check to verify that underlying device is
|
|
* not smaller than the filesystem. If the check fails then abort and
|
|
* scream, because bad stuff will happen otherwise.
|
|
*/
|
|
#if 0
|
|
if (s->s_bdev && s->s_bdev->bd_inode &&
|
|
i_size_read(s->s_bdev->bd_inode) <
|
|
sb_block_count(rs) * sb_blocksize(rs)) {
|
|
reiserfs_log(LOG_ERR,
|
|
"reiserfs: filesystem cannot be mounted because it is "
|
|
"bigger than the device.\n");
|
|
reiserfs_log(LOG_ERR, "reiserfs: you may need to run fsck "
|
|
"rr may be you forgot to reboot after fdisk when it "
|
|
"told you to.\n");
|
|
goto out;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* XXX This is from the original Linux code, but why affecting 2 values
|
|
* to the same variable?
|
|
*/
|
|
sbi->s_mount_state = SB_REISERFS_STATE(sbi);
|
|
sbi->s_mount_state = REISERFS_VALID_FS;
|
|
|
|
if ((error = (old_format ?
|
|
read_old_bitmaps(rmp) : read_bitmaps(rmp)))) {
|
|
reiserfs_log(LOG_ERR, "unable to read bitmap\n");
|
|
goto out;
|
|
}
|
|
|
|
/* Make data=ordered the default */
|
|
if (!reiserfs_data_log(sbi) && !reiserfs_data_ordered(sbi) &&
|
|
!reiserfs_data_writeback(sbi)) {
|
|
REISERFS_SB(sbi)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
|
|
}
|
|
|
|
if (reiserfs_data_log(sbi)) {
|
|
reiserfs_log(LOG_INFO, "using journaled data mode\n");
|
|
} else if (reiserfs_data_ordered(sbi)) {
|
|
reiserfs_log(LOG_INFO, "using ordered data mode\n");
|
|
} else {
|
|
reiserfs_log(LOG_INFO, "using writeback data mode\n");
|
|
}
|
|
|
|
/* TODO Not yet supported */
|
|
#if 0
|
|
if(journal_init(sbi, jdev_name, old_format, commit_max_age)) {
|
|
reiserfs_log(LOG_ERR, "unable to initialize journal space\n");
|
|
goto out;
|
|
} else {
|
|
jinit_done = 1 ; /* once this is set, journal_release must
|
|
be called if we error out of the mount */
|
|
}
|
|
|
|
if (reread_meta_blocks(sbi)) {
|
|
reiserfs_log(LOG_ERR,
|
|
"unable to reread meta blocks after journal init\n");
|
|
goto out;
|
|
}
|
|
#endif
|
|
|
|
/* Define and initialize hash function */
|
|
sbi->s_hash_function = hash_function(rmp);
|
|
|
|
if (sbi->s_hash_function == NULL) {
|
|
reiserfs_log(LOG_ERR, "couldn't determined hash function\n");
|
|
error = (EINVAL);
|
|
goto out;
|
|
}
|
|
|
|
if (is_reiserfs_3_5(rs) ||
|
|
(is_reiserfs_jr(rs) && SB_VERSION(sbi) == REISERFS_VERSION_1))
|
|
bit_set(&(sbi->s_properties), REISERFS_3_5);
|
|
else
|
|
bit_set(&(sbi->s_properties), REISERFS_3_6);
|
|
|
|
mp->mnt_data = rmp;
|
|
mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
|
|
mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
|
|
MNT_ILOCK(mp);
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
MNT_IUNLOCK(mp);
|
|
#if defined(si_mountpoint)
|
|
devvp->v_rdev->si_mountpoint = mp;
|
|
#endif
|
|
|
|
return (0);
|
|
|
|
out:
|
|
reiserfs_log(LOG_INFO, "*** error during mount ***\n");
|
|
if (sbi) {
|
|
if (SB_AP_BITMAP(sbi)) {
|
|
int i;
|
|
for (i = 0; i < SB_BMAP_NR(sbi); i++) {
|
|
if (!SB_AP_BITMAP(sbi)[i].bp_data)
|
|
break;
|
|
free(SB_AP_BITMAP(sbi)[i].bp_data, M_REISERFSMNT);
|
|
}
|
|
free(SB_AP_BITMAP(sbi), M_REISERFSMNT);
|
|
}
|
|
|
|
if (sbi->s_rs) {
|
|
free(sbi->s_rs, M_REISERFSMNT);
|
|
sbi->s_rs = NULL;
|
|
}
|
|
}
|
|
|
|
if (cp != NULL) {
|
|
DROP_GIANT();
|
|
g_topology_lock();
|
|
g_wither_geom_close(cp->geom, ENXIO);
|
|
g_topology_unlock();
|
|
PICKUP_GIANT();
|
|
}
|
|
|
|
if (sbi)
|
|
free(sbi, M_REISERFSMNT);
|
|
if (rmp)
|
|
free(rmp, M_REISERFSMNT);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Read the super block
|
|
*/
|
|
static int
|
|
read_super_block(struct reiserfs_mount *rmp, int offset)
|
|
{
|
|
struct buf *bp;
|
|
int error, bits;
|
|
struct reiserfs_super_block *rs;
|
|
struct reiserfs_sb_info *sbi;
|
|
uint16_t fs_blocksize;
|
|
|
|
if (offset == REISERFS_OLD_DISK_OFFSET) {
|
|
reiserfs_log(LOG_DEBUG,
|
|
"reiserfs/super: read old format super block\n");
|
|
} else {
|
|
reiserfs_log(LOG_DEBUG,
|
|
"reiserfs/super: read new format super block\n");
|
|
}
|
|
|
|
/* Read the super block */
|
|
if ((error = bread(rmp->rm_devvp, offset * btodb(REISERFS_BSIZE),
|
|
REISERFS_BSIZE, NOCRED, &bp)) != 0) {
|
|
reiserfs_log(LOG_ERR, "can't read device\n");
|
|
return (error);
|
|
}
|
|
|
|
/* Get it from the buffer data */
|
|
rs = (struct reiserfs_super_block *)bp->b_data;
|
|
if (!is_any_reiserfs_magic_string(rs)) {
|
|
brelse(bp);
|
|
return (EINVAL);
|
|
}
|
|
|
|
fs_blocksize = sb_blocksize(rs);
|
|
brelse(bp);
|
|
bp = NULL;
|
|
|
|
if (fs_blocksize <= 0) {
|
|
reiserfs_log(LOG_ERR, "unexpected null block size");
|
|
return (EINVAL);
|
|
}
|
|
|
|
/* Read the super block (for double check)
|
|
* We can't read the same blkno with a different size: it causes
|
|
* panic() if INVARIANTS is set. So we keep REISERFS_BSIZE */
|
|
if ((error = bread(rmp->rm_devvp,
|
|
offset * REISERFS_BSIZE / fs_blocksize * btodb(fs_blocksize),
|
|
REISERFS_BSIZE, NOCRED, &bp)) != 0) {
|
|
reiserfs_log(LOG_ERR, "can't reread the super block\n");
|
|
return (error);
|
|
}
|
|
|
|
rs = (struct reiserfs_super_block *)bp->b_data;
|
|
if (sb_blocksize(rs) != fs_blocksize) {
|
|
reiserfs_log(LOG_ERR, "unexpected block size "
|
|
"(found=%u, expected=%u)\n",
|
|
sb_blocksize(rs), fs_blocksize);
|
|
brelse(bp);
|
|
return (EINVAL);
|
|
}
|
|
|
|
reiserfs_log(LOG_DEBUG, "magic: `%s'\n", rs->s_v1.s_magic);
|
|
reiserfs_log(LOG_DEBUG, "label: `%s'\n", rs->s_label);
|
|
reiserfs_log(LOG_DEBUG, "block size: %6d\n", sb_blocksize(rs));
|
|
reiserfs_log(LOG_DEBUG, "block count: %6u\n",
|
|
rs->s_v1.s_block_count);
|
|
reiserfs_log(LOG_DEBUG, "bitmaps number: %6u\n",
|
|
rs->s_v1.s_bmap_nr);
|
|
|
|
if (rs->s_v1.s_root_block == -1) {
|
|
log(LOG_ERR,
|
|
"reiserfs: Unfinished reiserfsck --rebuild-tree run "
|
|
"detected. Please\n"
|
|
"run reiserfsck --rebuild-tree and wait for a "
|
|
"completion. If that\n"
|
|
"fails, get newer reiserfsprogs package");
|
|
brelse(bp);
|
|
return (EINVAL);
|
|
}
|
|
|
|
sbi = rmp->rm_reiserfs;
|
|
sbi->s_blocksize = fs_blocksize;
|
|
|
|
for (bits = 9, fs_blocksize >>= 9; fs_blocksize >>= 1; bits++)
|
|
;
|
|
sbi->s_blocksize_bits = bits;
|
|
|
|
/* Copy the buffer and release it */
|
|
sbi->s_rs = malloc(sizeof *rs, M_REISERFSMNT, M_WAITOK | M_ZERO);
|
|
if (!sbi->s_rs) {
|
|
reiserfs_log(LOG_ERR, "can not read the super block\n");
|
|
brelse(bp);
|
|
return (ENOMEM);
|
|
}
|
|
bcopy(rs, sbi->s_rs, sizeof(struct reiserfs_super_block));
|
|
brelse(bp);
|
|
|
|
if (is_reiserfs_jr(rs)) {
|
|
if (sb_version(rs) == REISERFS_VERSION_2)
|
|
reiserfs_log(LOG_INFO, "found reiserfs format \"3.6\""
|
|
" with non-standard journal");
|
|
else if (sb_version(rs) == REISERFS_VERSION_1)
|
|
reiserfs_log(LOG_INFO, "found reiserfs format \"3.5\""
|
|
" with non-standard journal");
|
|
else {
|
|
reiserfs_log(LOG_ERR, "found unknown "
|
|
"format \"%u\" of reiserfs with non-standard magic",
|
|
sb_version(rs));
|
|
return (EINVAL);
|
|
}
|
|
} else {
|
|
/*
|
|
* s_version of standard format may contain incorrect
|
|
* information, so we just look at the magic string
|
|
*/
|
|
reiserfs_log(LOG_INFO,
|
|
"found reiserfs format \"%s\" with standard journal\n",
|
|
is_reiserfs_3_5(rs) ? "3.5" : "3.6");
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure
|
|
* from disk.
|
|
* @sbi - superblock info for this filesystem
|
|
* @bi - the bitmap info to be loaded. Requires that bi->bp is valid.
|
|
*
|
|
* This routine counts how many free bits there are, finding the first
|
|
* zero as a side effect. Could also be implemented as a loop of
|
|
* test_bit() calls, or a loop of find_first_zero_bit() calls. This
|
|
* implementation is similar to find_first_zero_bit(), but doesn't
|
|
* return after it finds the first bit. Should only be called on fs
|
|
* mount, but should be fairly efficient anyways.
|
|
*
|
|
* bi->first_zero_hint is considered unset if it == 0, since the bitmap
|
|
* itself will invariably occupt block 0 represented in the bitmap. The
|
|
* only exception to this is when free_count also == 0, since there will
|
|
* be no free blocks at all.
|
|
*/
|
|
static void
|
|
load_bitmap_info_data(struct reiserfs_sb_info *sbi,
|
|
struct reiserfs_bitmap_info *bi)
|
|
{
|
|
unsigned long *cur;
|
|
|
|
cur = (unsigned long *)bi->bp_data;
|
|
while ((char *)cur < (bi->bp_data + sbi->s_blocksize)) {
|
|
/*
|
|
* No need to scan if all 0's or all 1's.
|
|
* Since we're only counting 0's, we can simply ignore
|
|
* all 1's
|
|
*/
|
|
if (*cur == 0) {
|
|
if (bi->first_zero_hint == 0) {
|
|
bi->first_zero_hint =
|
|
((char *)cur - bi->bp_data) << 3;
|
|
}
|
|
bi->free_count += sizeof(unsigned long) * 8;
|
|
} else if (*cur != ~0L) {
|
|
int b;
|
|
|
|
for (b = 0; b < sizeof(unsigned long) * 8; b++) {
|
|
if (!reiserfs_test_le_bit(b, cur)) {
|
|
bi->free_count++;
|
|
if (bi->first_zero_hint == 0)
|
|
bi->first_zero_hint =
|
|
(((char *)cur -
|
|
bi->bp_data) << 3) + b;
|
|
}
|
|
}
|
|
}
|
|
cur++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Read the bitmaps
|
|
*/
|
|
static int
|
|
read_bitmaps(struct reiserfs_mount *rmp)
|
|
{
|
|
int i, bmap_nr;
|
|
struct buf *bp = NULL;
|
|
struct reiserfs_sb_info *sbi = rmp->rm_reiserfs;
|
|
|
|
/* Allocate memory for the table of bitmaps */
|
|
SB_AP_BITMAP(sbi) =
|
|
malloc(sizeof(struct reiserfs_bitmap_info) * SB_BMAP_NR(sbi),
|
|
M_REISERFSMNT, M_WAITOK | M_ZERO);
|
|
if (!SB_AP_BITMAP(sbi))
|
|
return (ENOMEM);
|
|
|
|
/* Read all the bitmaps */
|
|
for (i = 0,
|
|
bmap_nr = (REISERFS_DISK_OFFSET_IN_BYTES / sbi->s_blocksize + 1) *
|
|
btodb(sbi->s_blocksize);
|
|
i < SB_BMAP_NR(sbi); i++, bmap_nr = sbi->s_blocksize * 8 * i) {
|
|
SB_AP_BITMAP(sbi)[i].bp_data = malloc(sbi->s_blocksize,
|
|
M_REISERFSMNT, M_WAITOK | M_ZERO);
|
|
if (!SB_AP_BITMAP(sbi)[i].bp_data)
|
|
return (ENOMEM);
|
|
bread(rmp->rm_devvp, bmap_nr, sbi->s_blocksize, NOCRED, &bp);
|
|
bcopy(bp->b_data, SB_AP_BITMAP(sbi)[i].bp_data,
|
|
sbi->s_blocksize);
|
|
brelse(bp);
|
|
bp = NULL;
|
|
|
|
/*if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh))
|
|
ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh);*/
|
|
}
|
|
|
|
for (i = 0; i < SB_BMAP_NR(sbi); i++) {
|
|
/*if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
|
|
reiserfs_warning(s,"sh-2029: reiserfs read_bitmaps: "
|
|
"bitmap block (#%lu) reading failed",
|
|
SB_AP_BITMAP(s)[i].bh->b_blocknr);
|
|
for (i = 0; i < SB_BMAP_NR(s); i++)
|
|
brelse(SB_AP_BITMAP(s)[i].bh);
|
|
vfree(SB_AP_BITMAP(s));
|
|
SB_AP_BITMAP(s) = NULL;
|
|
return 1;
|
|
}*/
|
|
load_bitmap_info_data(sbi, SB_AP_BITMAP(sbi) + i);
|
|
reiserfs_log(LOG_DEBUG,
|
|
"%d free blocks (starting at block %ld)\n",
|
|
SB_AP_BITMAP(sbi)[i].free_count,
|
|
(long)SB_AP_BITMAP(sbi)[i].first_zero_hint);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
// TODO Not supported
|
|
static int
|
|
read_old_bitmaps(struct reiserfs_mount *rmp)
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
#if 0
|
|
int i;
|
|
struct reiserfs_sb_info *sbi = rmp->rm_reiserfs;
|
|
struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(sbi);
|
|
|
|
/* First of bitmap blocks */
|
|
int bmp1 = (REISERFS_OLD_DISK_OFFSET / sbi->s_blocksize) *
|
|
btodb(sbi->s_blocksize);
|
|
|
|
/* Read true bitmap */
|
|
SB_AP_BITMAP(sbi) =
|
|
malloc(sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs),
|
|
M_REISERFSMNT, M_WAITOK | M_ZERO);
|
|
if (!SB_AP_BITMAP(sbi))
|
|
return 1;
|
|
|
|
for (i = 0; i < sb_bmap_nr(rs); i ++) {
|
|
SB_AP_BITMAP(sbi)[i].bp = getblk(rmp->rm_devvp,
|
|
(bmp1 + i) * btodb(sbi->s_blocksize), sbi->s_blocksize, 0, 0, 0);
|
|
if (!SB_AP_BITMAP(sbi)[i].bp)
|
|
return 1;
|
|
load_bitmap_info_data(sbi, SB_AP_BITMAP(sbi) + i);
|
|
}
|
|
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
/* -------------------------------------------------------------------
|
|
* Hash detection stuff
|
|
* -------------------------------------------------------------------*/
|
|
|
|
static int
|
|
get_root_node(struct reiserfs_mount *rmp, struct reiserfs_node **root)
|
|
{
|
|
struct reiserfs_node *ip;
|
|
struct reiserfs_iget_args args;
|
|
|
|
/* Allocate the node structure */
|
|
reiserfs_log(LOG_DEBUG, "malloc(struct reiserfs_node)\n");
|
|
ip = malloc(sizeof(struct reiserfs_node),
|
|
M_REISERFSNODE, M_WAITOK | M_ZERO);
|
|
|
|
/* Fill the structure */
|
|
reiserfs_log(LOG_DEBUG, "filling *ip\n");
|
|
ip->i_dev = rmp->rm_dev;
|
|
ip->i_number = REISERFS_ROOT_OBJECTID;
|
|
ip->i_ino = REISERFS_ROOT_PARENT_OBJECTID;
|
|
ip->i_reiserfs = rmp->rm_reiserfs;
|
|
|
|
/* Read the inode */
|
|
args.objectid = ip->i_number;
|
|
args.dirid = ip->i_ino;
|
|
reiserfs_log(LOG_DEBUG, "call reiserfs_read_locked_inode("
|
|
"objectid=%d,dirid=%d)\n", args.objectid, args.dirid);
|
|
reiserfs_read_locked_inode(ip, &args);
|
|
|
|
ip->i_devvp = rmp->rm_devvp;
|
|
//XXX VREF(ip->i_devvp); Is it necessary ?
|
|
|
|
*root = ip;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* If root directory is empty - we set default - Yura's - hash and warn
|
|
* about it.
|
|
* FIXME: we look for only one name in a directory. If tea and yura both
|
|
* have the same value - we ask user to send report to the mailing list
|
|
*/
|
|
uint32_t find_hash_out(struct reiserfs_mount *rmp)
|
|
{
|
|
int retval;
|
|
struct cpu_key key;
|
|
INITIALIZE_PATH(path);
|
|
struct reiserfs_node *ip;
|
|
struct reiserfs_sb_info *sbi;
|
|
struct reiserfs_dir_entry de;
|
|
uint32_t hash = DEFAULT_HASH;
|
|
|
|
get_root_node(rmp, &ip);
|
|
if (!ip)
|
|
return (UNSET_HASH);
|
|
|
|
sbi = rmp->rm_reiserfs;
|
|
|
|
do {
|
|
uint32_t teahash, r5hash, yurahash;
|
|
|
|
reiserfs_log(LOG_DEBUG, "make_cpu_key\n");
|
|
make_cpu_key(&key, ip, ~0, TYPE_DIRENTRY, 3);
|
|
reiserfs_log(LOG_DEBUG, "search_by_entry_key for "
|
|
"key(objectid=%d,dirid=%d)\n",
|
|
key.on_disk_key.k_objectid, key.on_disk_key.k_dir_id);
|
|
retval = search_by_entry_key(sbi, &key, &path, &de);
|
|
if (retval == IO_ERROR) {
|
|
pathrelse(&path);
|
|
return (UNSET_HASH);
|
|
}
|
|
if (retval == NAME_NOT_FOUND)
|
|
de.de_entry_num--;
|
|
|
|
reiserfs_log(LOG_DEBUG, "name found\n");
|
|
|
|
set_de_name_and_namelen(&de);
|
|
|
|
if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
|
|
/* Allow override in this case */
|
|
if (reiserfs_rupasov_hash(sbi)) {
|
|
hash = YURA_HASH;
|
|
}
|
|
reiserfs_log(LOG_DEBUG,
|
|
"FS seems to be empty, autodetect "
|
|
"is using the default hash");
|
|
break;
|
|
}
|
|
|
|
r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
|
|
teahash = GET_HASH_VALUE(keyed_hash(de.de_name,
|
|
de.de_namelen));
|
|
yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
|
|
if (((teahash == r5hash) &&
|
|
(GET_HASH_VALUE(
|
|
deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)) ||
|
|
((teahash == yurahash) &&
|
|
(yurahash ==
|
|
GET_HASH_VALUE(
|
|
deh_offset(&(de.de_deh[de.de_entry_num]))))) ||
|
|
((r5hash == yurahash) &&
|
|
(yurahash ==
|
|
GET_HASH_VALUE(
|
|
deh_offset(&(de.de_deh[de.de_entry_num])))))) {
|
|
reiserfs_log(LOG_ERR,
|
|
"unable to automatically detect hash "
|
|
"function. Please mount with -o "
|
|
"hash={tea,rupasov,r5}");
|
|
hash = UNSET_HASH;
|
|
break;
|
|
}
|
|
|
|
if (GET_HASH_VALUE(
|
|
deh_offset(&(de.de_deh[de.de_entry_num]))) == yurahash) {
|
|
reiserfs_log(LOG_DEBUG, "detected YURA hash\n");
|
|
hash = YURA_HASH;
|
|
} else if (GET_HASH_VALUE(
|
|
deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash) {
|
|
reiserfs_log(LOG_DEBUG, "detected TEA hash\n");
|
|
hash = TEA_HASH;
|
|
} else if (GET_HASH_VALUE(
|
|
deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) {
|
|
reiserfs_log(LOG_DEBUG, "detected R5 hash\n");
|
|
hash = R5_HASH;
|
|
} else {
|
|
reiserfs_log(LOG_WARNING, "unrecognised hash function");
|
|
hash = UNSET_HASH;
|
|
}
|
|
} while (0);
|
|
|
|
pathrelse(&path);
|
|
return (hash);
|
|
}
|
|
|
|
/* Finds out which hash names are sorted with */
|
|
static int
|
|
what_hash(struct reiserfs_mount *rmp)
|
|
{
|
|
uint32_t code;
|
|
struct reiserfs_sb_info *sbi = rmp->rm_reiserfs;
|
|
|
|
find_hash_out(rmp);
|
|
code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(sbi));
|
|
|
|
/*
|
|
* reiserfs_hash_detect() == true if any of the hash mount options
|
|
* were used. We must check them to make sure the user isn't using a
|
|
* bad hash value
|
|
*/
|
|
if (code == UNSET_HASH || reiserfs_hash_detect(sbi))
|
|
code = find_hash_out(rmp);
|
|
|
|
if (code != UNSET_HASH && reiserfs_hash_detect(sbi)) {
|
|
/*
|
|
* Detection has found the hash, and we must check against
|
|
* the mount options
|
|
*/
|
|
if (reiserfs_rupasov_hash(sbi) && code != YURA_HASH) {
|
|
reiserfs_log(LOG_ERR, "error, %s hash detected, "
|
|
"unable to force rupasov hash",
|
|
reiserfs_hashname(code));
|
|
code = UNSET_HASH;
|
|
} else if (reiserfs_tea_hash(sbi) && code != TEA_HASH) {
|
|
reiserfs_log(LOG_ERR, "error, %s hash detected, "
|
|
"unable to force tea hash",
|
|
reiserfs_hashname(code));
|
|
code = UNSET_HASH;
|
|
} else if (reiserfs_r5_hash(sbi) && code != R5_HASH) {
|
|
reiserfs_log(LOG_ERR, "error, %s hash detected, "
|
|
"unable to force r5 hash",
|
|
reiserfs_hashname(code));
|
|
code = UNSET_HASH;
|
|
}
|
|
} else {
|
|
/*
|
|
* Find_hash_out was not called or could not determine
|
|
* the hash
|
|
*/
|
|
if (reiserfs_rupasov_hash(sbi)) {
|
|
code = YURA_HASH;
|
|
} else if (reiserfs_tea_hash(sbi)) {
|
|
code = TEA_HASH;
|
|
} else if (reiserfs_r5_hash(sbi)) {
|
|
code = R5_HASH;
|
|
}
|
|
}
|
|
|
|
/* TODO Not supported yet */
|
|
#if 0
|
|
/* If we are mounted RW, and we have a new valid hash code, update
|
|
* the super */
|
|
if (code != UNSET_HASH &&
|
|
!(s->s_flags & MS_RDONLY) &&
|
|
code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
|
|
set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
|
|
}
|
|
#endif
|
|
|
|
return (code);
|
|
}
|
|
|
|
/* Return pointer to appropriate function */
|
|
static hashf_t
|
|
hash_function(struct reiserfs_mount *rmp)
|
|
{
|
|
|
|
switch (what_hash(rmp)) {
|
|
case TEA_HASH:
|
|
reiserfs_log(LOG_INFO, "using tea hash to sort names\n");
|
|
return (keyed_hash);
|
|
case YURA_HASH:
|
|
reiserfs_log(LOG_INFO, "using rupasov hash to sort names\n");
|
|
return (yura_hash);
|
|
case R5_HASH:
|
|
reiserfs_log(LOG_INFO, "using r5 hash to sort names\n");
|
|
return (r5_hash);
|
|
}
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
/* -------------------------------------------------------------------
|
|
* VFS registration
|
|
* -------------------------------------------------------------------*/
|
|
|
|
static struct vfsops reiser_vfsops = {
|
|
.vfs_cmount = reiserfs_cmount,
|
|
.vfs_mount = reiserfs_mount,
|
|
.vfs_unmount = reiserfs_unmount,
|
|
//.vfs_checkexp = reiserfs_checkexp,
|
|
//.vfs_extattrctl = reiserfs_extattrctl,
|
|
.vfs_fhtovp = reiserfs_fhtovp,
|
|
//.vfs_quotactl = reiserfs_quotactl,
|
|
.vfs_root = reiserfs_root,
|
|
//.vfs_start = reiserfs_start,
|
|
.vfs_statfs = reiserfs_statfs,
|
|
//.vfs_sync = reiserfs_sync,
|
|
//.vfs_vget = reiserfs_vget,
|
|
};
|
|
|
|
VFS_SET(reiser_vfsops, reiserfs, VFCF_READONLY);
|