Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 508 insertions, 0 deletions

diff --git a/fs/adfs/super.c b/fs/adfs/super.c
new file mode 100644
index 000000000000..243963228d10
--- /dev/null
+++ b/fs/adfs/super.c
@@ -0,0 +1,508 @@
+/*
+ *  linux/fs/adfs/super.c
+ *
+ *  Copyright (C) 1997-1999 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/adfs_fs.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/buffer_head.h>
+#include <linux/vfs.h>
+#include <linux/parser.h>
+#include <linux/bitops.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#include <stdarg.h>
+
+#include "adfs.h"
+#include "dir_f.h"
+#include "dir_fplus.h"
+
+void __adfs_error(struct super_block *sb, const char *function, const char *fmt, ...)
+{
+        char error_buf[128];
+        va_list args;
+
+        va_start(args, fmt);
+        vsprintf(error_buf, fmt, args);
+        va_end(args);
+
+        printk(KERN_CRIT "ADFS-fs error (device %s)%s%s: %s\n",
+                sb->s_id, function ? ": " : "",
+                function ? function : "", error_buf);
+}
+
+static int adfs_checkdiscrecord(struct adfs_discrecord *dr)
+{
+        int i;
+
+        /* sector size must be 256, 512 or 1024 bytes */
+        if (dr->log2secsize != 8 &&
+            dr->log2secsize != 9 &&
+            dr->log2secsize != 10)
+                return 1;
+
+        /* idlen must be at least log2secsize + 3 */
+        if (dr->idlen < dr->log2secsize + 3)
+                return 1;
+
+        /* we cannot have such a large disc that we
+         * are unable to represent sector offsets in
+         * 32 bits.  This works out at 2.0 TB.
+         */
+        if (le32_to_cpu(dr->disc_size_high) >> dr->log2secsize)
+                return 1;
+
+        /* idlen must be no greater than 19 v2 [1.0] */
+        if (dr->idlen > 19)
+                return 1;
+
+        /* reserved bytes should be zero */
+        for (i = 0; i < sizeof(dr->unused52); i++)
+                if (dr->unused52[i] != 0)
+                        return 1;
+
+        return 0;
+}
+
+static unsigned char adfs_calczonecheck(struct super_block *sb, unsigned char *map)
+{
+        unsigned int v0, v1, v2, v3;
+        int i;
+
+        v0 = v1 = v2 = v3 = 0;
+        for (i = sb->s_blocksize - 4; i; i -= 4) {
+                v0 += map[i]     + (v3 >> 8);
+                v3 &= 0xff;
+                v1 += map[i + 1] + (v0 >> 8);
+                v0 &= 0xff;
+                v2 += map[i + 2] + (v1 >> 8);
+                v1 &= 0xff;
+                v3 += map[i + 3] + (v2 >> 8);
+                v2 &= 0xff;
+        }
+        v0 +=           v3 >> 8;
+        v1 += map[1] + (v0 >> 8);
+        v2 += map[2] + (v1 >> 8);
+        v3 += map[3] + (v2 >> 8);
+
+        return v0 ^ v1 ^ v2 ^ v3;
+}
+
+static int adfs_checkmap(struct super_block *sb, struct adfs_discmap *dm)
+{
+        unsigned char crosscheck = 0, zonecheck = 1;
+        int i;
+
+        for (i = 0; i < ADFS_SB(sb)->s_map_size; i++) {
+                unsigned char *map;
+
+                map = dm[i].dm_bh->b_data;
+
+                if (adfs_calczonecheck(sb, map) != map[0]) {
+                        adfs_error(sb, "zone %d fails zonecheck", i);
+                        zonecheck = 0;
+                }
+                crosscheck ^= map[3];
+        }
+        if (crosscheck != 0xff)
+                adfs_error(sb, "crosscheck != 0xff");
+        return crosscheck == 0xff && zonecheck;
+}
+
+static void adfs_put_super(struct super_block *sb)
+{
+        int i;
+        struct adfs_sb_info *asb = ADFS_SB(sb);
+
+        for (i = 0; i < asb->s_map_size; i++)
+                brelse(asb->s_map[i].dm_bh);
+        kfree(asb->s_map);
+        kfree(asb);
+        sb->s_fs_info = NULL;
+}
+
+enum {Opt_uid, Opt_gid, Opt_ownmask, Opt_othmask, Opt_err};
+
+static match_table_t tokens = {
+        {Opt_uid, "uid=%u"},
+        {Opt_gid, "gid=%u"},
+        {Opt_ownmask, "ownmask=%o"},
+        {Opt_othmask, "othmask=%o"},
+        {Opt_err, NULL}
+};
+
+static int parse_options(struct super_block *sb, char *options)
+{
+        char *p;
+        struct adfs_sb_info *asb = ADFS_SB(sb);
+        int option;
+
+        if (!options)
+                return 0;
+
+        while ((p = strsep(&options, ",")) != NULL) {
+                substring_t args[MAX_OPT_ARGS];
+                int token;
+                if (!*p)
+                        continue;
+
+                token = match_token(p, tokens, args);
+                switch (token) {
+                case Opt_uid:
+                        if (match_int(args, &option))
+                                return -EINVAL;
+                        asb->s_uid = option;
+                        break;
+                case Opt_gid:
+                        if (match_int(args, &option))
+                                return -EINVAL;
+                        asb->s_gid = option;
+                        break;
+                case Opt_ownmask:
+                        if (match_octal(args, &option))
+                                return -EINVAL;
+                        asb->s_owner_mask = option;
+                        break;
+                case Opt_othmask:
+                        if (match_octal(args, &option))
+                                return -EINVAL;
+                        asb->s_other_mask = option;
+                        break;
+                default:
+                        printk("ADFS-fs: unrecognised mount option \"%s\" "
+                                        "or missing value\n", p);
+                        return -EINVAL;
+                }
+        }
+        return 0;
+}
+
+static int adfs_remount(struct super_block *sb, int *flags, char *data)
+{
+        *flags |= MS_NODIRATIME;
+        return parse_options(sb, data);
+}
+
+static int adfs_statfs(struct super_block *sb, struct kstatfs *buf)
+{
+        struct adfs_sb_info *asb = ADFS_SB(sb);
+
+        buf->f_type    = ADFS_SUPER_MAGIC;
+        buf->f_namelen = asb->s_namelen;
+        buf->f_bsize   = sb->s_blocksize;
+        buf->f_blocks  = asb->s_size;
+        buf->f_files   = asb->s_ids_per_zone * asb->s_map_size;
+        buf->f_bavail  =
+        buf->f_bfree   = adfs_map_free(sb);
+        buf->f_ffree   = (long)(buf->f_bfree * buf->f_files) / (long)buf->f_blocks;
+
+        return 0;
+}
+
+static kmem_cache_t *adfs_inode_cachep;
+
+static struct inode *adfs_alloc_inode(struct super_block *sb)
+{
+        struct adfs_inode_info *ei;
+        ei = (struct adfs_inode_info *)kmem_cache_alloc(adfs_inode_cachep, SLAB_KERNEL);
+        if (!ei)
+                return NULL;
+        return &ei->vfs_inode;
+}
+
+static void adfs_destroy_inode(struct inode *inode)
+{
+        kmem_cache_free(adfs_inode_cachep, ADFS_I(inode));
+}
+
+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+{
+        struct adfs_inode_info *ei = (struct adfs_inode_info *) foo;
+
+        if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+            SLAB_CTOR_CONSTRUCTOR)
+                inode_init_once(&ei->vfs_inode);
+}
+ 
+static int init_inodecache(void)
+{
+        adfs_inode_cachep = kmem_cache_create("adfs_inode_cache",
+                                             sizeof(struct adfs_inode_info),
+                                             0, SLAB_RECLAIM_ACCOUNT,
+                                             init_once, NULL);
+        if (adfs_inode_cachep == NULL)
+                return -ENOMEM;
+        return 0;
+}
+
+static void destroy_inodecache(void)
+{
+        if (kmem_cache_destroy(adfs_inode_cachep))
+                printk(KERN_INFO "adfs_inode_cache: not all structures were freed\n");
+}
+
+static struct super_operations adfs_sops = {
+        .alloc_inode    = adfs_alloc_inode,
+        .destroy_inode  = adfs_destroy_inode,
+        .write_inode    = adfs_write_inode,
+        .put_super      = adfs_put_super,
+        .statfs         = adfs_statfs,
+        .remount_fs     = adfs_remount,
+};
+
+static struct adfs_discmap *adfs_read_map(struct super_block *sb, struct adfs_discrecord *dr)
+{
+        struct adfs_discmap *dm;
+        unsigned int map_addr, zone_size, nzones;
+        int i, zone;
+        struct adfs_sb_info *asb = ADFS_SB(sb);
+
+        nzones    = asb->s_map_size;
+        zone_size = (8 << dr->log2secsize) - le16_to_cpu(dr->zone_spare);
+        map_addr  = (nzones >> 1) * zone_size -
+                     ((nzones > 1) ? ADFS_DR_SIZE_BITS : 0);
+        map_addr  = signed_asl(map_addr, asb->s_map2blk);
+
+        asb->s_ids_per_zone = zone_size / (asb->s_idlen + 1);
+
+        dm = kmalloc(nzones * sizeof(*dm), GFP_KERNEL);
+        if (dm == NULL) {
+                adfs_error(sb, "not enough memory");
+                return NULL;
+        }
+
+        for (zone = 0; zone < nzones; zone++, map_addr++) {
+                dm[zone].dm_startbit = 0;
+                dm[zone].dm_endbit   = zone_size;
+                dm[zone].dm_startblk = zone * zone_size - ADFS_DR_SIZE_BITS;
+                dm[zone].dm_bh       = sb_bread(sb, map_addr);
+
+                if (!dm[zone].dm_bh) {
+                        adfs_error(sb, "unable to read map");
+                        goto error_free;
+                }
+        }
+
+        /* adjust the limits for the first and last map zones */
+        i = zone - 1;
+        dm[0].dm_startblk = 0;
+        dm[0].dm_startbit = ADFS_DR_SIZE_BITS;
+        dm[i].dm_endbit   = (le32_to_cpu(dr->disc_size_high) << (32 - dr->log2bpmb)) +
+                            (le32_to_cpu(dr->disc_size) >> dr->log2bpmb) +
+                            (ADFS_DR_SIZE_BITS - i * zone_size);
+
+        if (adfs_checkmap(sb, dm))
+                return dm;
+
+        adfs_error(sb, NULL, "map corrupted");
+
+error_free:
+        while (--zone >= 0)
+                brelse(dm[zone].dm_bh);
+
+        kfree(dm);
+        return NULL;
+}
+
+static inline unsigned long adfs_discsize(struct adfs_discrecord *dr, int block_bits)
+{
+        unsigned long discsize;
+
+        discsize  = le32_to_cpu(dr->disc_size_high) << (32 - block_bits);
+        discsize |= le32_to_cpu(dr->disc_size) >> block_bits;
+
+        return discsize;
+}
+
+static int adfs_fill_super(struct super_block *sb, void *data, int silent)
+{
+        struct adfs_discrecord *dr;
+        struct buffer_head *bh;
+        struct object_info root_obj;
+        unsigned char *b_data;
+        struct adfs_sb_info *asb;
+        struct inode *root;
+
+        sb->s_flags |= MS_NODIRATIME;
+
+        asb = kmalloc(sizeof(*asb), GFP_KERNEL);
+        if (!asb)
+                return -ENOMEM;
+        sb->s_fs_info = asb;
+        memset(asb, 0, sizeof(*asb));
+
+        /* set default options */
+        asb->s_uid = 0;
+        asb->s_gid = 0;
+        asb->s_owner_mask = S_IRWXU;
+        asb->s_other_mask = S_IRWXG | S_IRWXO;
+
+        if (parse_options(sb, data))
+                goto error;
+
+        sb_set_blocksize(sb, BLOCK_SIZE);
+        if (!(bh = sb_bread(sb, ADFS_DISCRECORD / BLOCK_SIZE))) {
+                adfs_error(sb, "unable to read superblock");
+                goto error;
+        }
+
+        b_data = bh->b_data + (ADFS_DISCRECORD % BLOCK_SIZE);
+
+        if (adfs_checkbblk(b_data)) {
+                if (!silent)
+                        printk("VFS: Can't find an adfs filesystem on dev "
+                                "%s.\n", sb->s_id);
+                goto error_free_bh;
+        }
+
+        dr = (struct adfs_discrecord *)(b_data + ADFS_DR_OFFSET);
+
+        /*
+         * Do some sanity checks on the ADFS disc record
+         */
+        if (adfs_checkdiscrecord(dr)) {
+                if (!silent)
+                        printk("VPS: Can't find an adfs filesystem on dev "
+                                "%s.\n", sb->s_id);
+                goto error_free_bh;
+        }
+
+        brelse(bh);
+        if (sb_set_blocksize(sb, 1 << dr->log2secsize)) {
+                bh = sb_bread(sb, ADFS_DISCRECORD / sb->s_blocksize);
+                if (!bh) {
+                        adfs_error(sb, "couldn't read superblock on "
+                                "2nd try.");
+                        goto error;
+                }
+                b_data = bh->b_data + (ADFS_DISCRECORD % sb->s_blocksize);
+                if (adfs_checkbblk(b_data)) {
+                        adfs_error(sb, "disc record mismatch, very weird!");
+                        goto error_free_bh;
+                }
+                dr = (struct adfs_discrecord *)(b_data + ADFS_DR_OFFSET);
+        } else {
+                if (!silent)
+                        printk(KERN_ERR "VFS: Unsupported blocksize on dev "
+                                "%s.\n", sb->s_id);
+                goto error;
+        }
+
+        /*
+         * blocksize on this device should now be set to the ADFS log2secsize
+         */
+
+        sb->s_magic             = ADFS_SUPER_MAGIC;
+        asb->s_idlen            = dr->idlen;
+        asb->s_map_size         = dr->nzones | (dr->nzones_high << 8);
+        asb->s_map2blk          = dr->log2bpmb - dr->log2secsize;
+        asb->s_size             = adfs_discsize(dr, sb->s_blocksize_bits);
+        asb->s_version          = dr->format_version;
+        asb->s_log2sharesize    = dr->log2sharesize;
+        
+        asb->s_map = adfs_read_map(sb, dr);
+        if (!asb->s_map)
+                goto error_free_bh;
+
+        brelse(bh);
+
+        /*
+         * set up enough so that we can read an inode
+         */
+        sb->s_op = &adfs_sops;
+
+        dr = (struct adfs_discrecord *)(asb->s_map[0].dm_bh->b_data + 4);
+
+        root_obj.parent_id = root_obj.file_id = le32_to_cpu(dr->root);
+        root_obj.name_len  = 0;
+        root_obj.loadaddr  = 0;
+        root_obj.execaddr  = 0;
+        root_obj.size      = ADFS_NEWDIR_SIZE;
+        root_obj.attr      = ADFS_NDA_DIRECTORY   | ADFS_NDA_OWNER_READ |
+                             ADFS_NDA_OWNER_WRITE | ADFS_NDA_PUBLIC_READ;
+
+        /*
+         * If this is a F+ disk with variable length directories,
+         * get the root_size from the disc record.
+         */
+        if (asb->s_version) {
+                root_obj.size = le32_to_cpu(dr->root_size);
+                asb->s_dir     = &adfs_fplus_dir_ops;
+                asb->s_namelen = ADFS_FPLUS_NAME_LEN;
+        } else {
+                asb->s_dir     = &adfs_f_dir_ops;
+                asb->s_namelen = ADFS_F_NAME_LEN;
+        }
+
+        root = adfs_iget(sb, &root_obj);
+        sb->s_root = d_alloc_root(root);
+        if (!sb->s_root) {
+                int i;
+                iput(root);
+                for (i = 0; i < asb->s_map_size; i++)
+                        brelse(asb->s_map[i].dm_bh);
+                kfree(asb->s_map);
+                adfs_error(sb, "get root inode failed\n");
+                goto error;
+        } else
+                sb->s_root->d_op = &adfs_dentry_operations;
+        return 0;
+
+error_free_bh:
+        brelse(bh);
+error:
+        sb->s_fs_info = NULL;
+        kfree(asb);
+        return -EINVAL;
+}
+
+static struct super_block *adfs_get_sb(struct file_system_type *fs_type,
+        int flags, const char *dev_name, void *data)
+{
+        return get_sb_bdev(fs_type, flags, dev_name, data, adfs_fill_super);
+}
+
+static struct file_system_type adfs_fs_type = {
+        .owner          = THIS_MODULE,
+        .name           = "adfs",
+        .get_sb         = adfs_get_sb,
+        .kill_sb        = kill_block_super,
+        .fs_flags       = FS_REQUIRES_DEV,
+};
+
+static int __init init_adfs_fs(void)
+{
+        int err = init_inodecache();
+        if (err)
+                goto out1;
+        err = register_filesystem(&adfs_fs_type);
+        if (err)
+                goto out;
+        return 0;
+out:
+        destroy_inodecache();
+out1:
+        return err;
+}
+
+static void __exit exit_adfs_fs(void)
+{
+        unregister_filesystem(&adfs_fs_type);
+        destroy_inodecache();
+}
+
+module_init(init_adfs_fs)
+module_exit(exit_adfs_fs)