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, 420 insertions, 0 deletions

diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
new file mode 100644
index 000000000000..64e0fb33fc0c
--- /dev/null
+++ b/fs/bfs/inode.c
@@ -0,0 +1,420 @@
+/*
+ *      fs/bfs/inode.c
+ *      BFS superblock and inode operations.
+ *      Copyright (C) 1999,2000 Tigran Aivazian <tigran@veritas.com>
+ *      From fs/minix, Copyright (C) 1991, 1992 Linus Torvalds.
+ */
+
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>
+#include <linux/vfs.h>
+#include <asm/uaccess.h>
+#include "bfs.h"
+
+MODULE_AUTHOR("Tigran A. Aivazian <tigran@veritas.com>");
+MODULE_DESCRIPTION("SCO UnixWare BFS filesystem for Linux");
+MODULE_LICENSE("GPL");
+
+#undef DEBUG
+
+#ifdef DEBUG
+#define dprintf(x...)   printf(x)
+#else
+#define dprintf(x...)
+#endif
+
+void dump_imap(const char *prefix, struct super_block * s);
+
+static void bfs_read_inode(struct inode * inode)
+{
+        unsigned long ino = inode->i_ino;
+        struct bfs_inode * di;
+        struct buffer_head * bh;
+        int block, off;
+
+        if (ino < BFS_ROOT_INO || ino > BFS_SB(inode->i_sb)->si_lasti) {
+                printf("Bad inode number %s:%08lx\n", inode->i_sb->s_id, ino);
+                make_bad_inode(inode);
+                return;
+        }
+
+        block = (ino - BFS_ROOT_INO)/BFS_INODES_PER_BLOCK + 1;
+        bh = sb_bread(inode->i_sb, block);
+        if (!bh) {
+                printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id, ino);
+                make_bad_inode(inode);
+                return;
+        }
+
+        off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK;
+        di = (struct bfs_inode *)bh->b_data + off;
+
+        inode->i_mode = 0x0000FFFF & di->i_mode;
+        if (di->i_vtype == BFS_VDIR) {
+                inode->i_mode |= S_IFDIR;
+                inode->i_op = &bfs_dir_inops;
+                inode->i_fop = &bfs_dir_operations;
+        } else if (di->i_vtype == BFS_VREG) {
+                inode->i_mode |= S_IFREG;
+                inode->i_op = &bfs_file_inops;
+                inode->i_fop = &bfs_file_operations;
+                inode->i_mapping->a_ops = &bfs_aops;
+        }
+
+        inode->i_uid = di->i_uid;
+        inode->i_gid = di->i_gid;
+        inode->i_nlink = di->i_nlink;
+        inode->i_size = BFS_FILESIZE(di);
+        inode->i_blocks = BFS_FILEBLOCKS(di);
+        inode->i_blksize = PAGE_SIZE;
+        inode->i_atime.tv_sec = di->i_atime;
+        inode->i_mtime.tv_sec = di->i_mtime;
+        inode->i_ctime.tv_sec = di->i_ctime;
+        inode->i_atime.tv_nsec = 0;
+        inode->i_mtime.tv_nsec = 0;
+        inode->i_ctime.tv_nsec = 0;
+        BFS_I(inode)->i_dsk_ino = di->i_ino; /* can be 0 so we store a copy */
+        BFS_I(inode)->i_sblock = di->i_sblock;
+        BFS_I(inode)->i_eblock = di->i_eblock;
+
+        brelse(bh);
+}
+
+static int bfs_write_inode(struct inode * inode, int unused)
+{
+        unsigned long ino = inode->i_ino;
+        struct bfs_inode * di;
+        struct buffer_head * bh;
+        int block, off;
+
+        if (ino < BFS_ROOT_INO || ino > BFS_SB(inode->i_sb)->si_lasti) {
+                printf("Bad inode number %s:%08lx\n", inode->i_sb->s_id, ino);
+                return -EIO;
+        }
+
+        lock_kernel();
+        block = (ino - BFS_ROOT_INO)/BFS_INODES_PER_BLOCK + 1;
+        bh = sb_bread(inode->i_sb, block);
+        if (!bh) {
+                printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id, ino);
+                unlock_kernel();
+                return -EIO;
+        }
+
+        off = (ino - BFS_ROOT_INO)%BFS_INODES_PER_BLOCK;
+        di = (struct bfs_inode *)bh->b_data + off;
+
+        if (inode->i_ino == BFS_ROOT_INO)
+                di->i_vtype = BFS_VDIR;
+        else
+                di->i_vtype = BFS_VREG;
+
+        di->i_ino = inode->i_ino;
+        di->i_mode = inode->i_mode;
+        di->i_uid = inode->i_uid;
+        di->i_gid = inode->i_gid;
+        di->i_nlink = inode->i_nlink;
+        di->i_atime = inode->i_atime.tv_sec;
+        di->i_mtime = inode->i_mtime.tv_sec;
+        di->i_ctime = inode->i_ctime.tv_sec;
+        di->i_sblock = BFS_I(inode)->i_sblock;
+        di->i_eblock = BFS_I(inode)->i_eblock;
+        di->i_eoffset = di->i_sblock * BFS_BSIZE + inode->i_size - 1;
+
+        mark_buffer_dirty(bh);
+        brelse(bh);
+        unlock_kernel();
+        return 0;
+}
+
+static void bfs_delete_inode(struct inode * inode)
+{
+        unsigned long ino = inode->i_ino;
+        struct bfs_inode * di;
+        struct buffer_head * bh;
+        int block, off;
+        struct super_block * s = inode->i_sb;
+        struct bfs_sb_info * info = BFS_SB(s);
+
+        dprintf("ino=%08lx\n", inode->i_ino);
+
+        if (inode->i_ino < BFS_ROOT_INO || inode->i_ino > info->si_lasti) {
+                printf("invalid ino=%08lx\n", inode->i_ino);
+                return;
+        }
+        
+        inode->i_size = 0;
+        inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
+        lock_kernel();
+        mark_inode_dirty(inode);
+        block = (ino - BFS_ROOT_INO)/BFS_INODES_PER_BLOCK + 1;
+        bh = sb_bread(s, block);
+        if (!bh) {
+                printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id, ino);
+                unlock_kernel();
+                return;
+        }
+        off = (ino - BFS_ROOT_INO)%BFS_INODES_PER_BLOCK;
+        di = (struct bfs_inode *)bh->b_data + off;
+        if (di->i_ino) {
+                info->si_freeb += BFS_FILEBLOCKS(di);
+                info->si_freei++;
+                clear_bit(di->i_ino, info->si_imap);
+                dump_imap("delete_inode", s);
+        }
+        di->i_ino = 0;
+        di->i_sblock = 0;
+        mark_buffer_dirty(bh);
+        brelse(bh);
+
+        /* if this was the last file, make the previous 
+           block "last files last block" even if there is no real file there,
+           saves us 1 gap */
+        if (info->si_lf_eblk == BFS_I(inode)->i_eblock) {
+                info->si_lf_eblk = BFS_I(inode)->i_sblock - 1;
+                mark_buffer_dirty(info->si_sbh);
+        }
+        unlock_kernel();
+        clear_inode(inode);
+}
+
+static void bfs_put_super(struct super_block *s)
+{
+        struct bfs_sb_info *info = BFS_SB(s);
+        brelse(info->si_sbh);
+        kfree(info->si_imap);
+        kfree(info);
+        s->s_fs_info = NULL;
+}
+
+static int bfs_statfs(struct super_block *s, struct kstatfs *buf)
+{
+        struct bfs_sb_info *info = BFS_SB(s);
+        u64 id = huge_encode_dev(s->s_bdev->bd_dev);
+        buf->f_type = BFS_MAGIC;
+        buf->f_bsize = s->s_blocksize;
+        buf->f_blocks = info->si_blocks;
+        buf->f_bfree = buf->f_bavail = info->si_freeb;
+        buf->f_files = info->si_lasti + 1 - BFS_ROOT_INO;
+        buf->f_ffree = info->si_freei;
+        buf->f_fsid.val[0] = (u32)id;
+        buf->f_fsid.val[1] = (u32)(id >> 32);
+        buf->f_namelen = BFS_NAMELEN;
+        return 0;
+}
+
+static void bfs_write_super(struct super_block *s)
+{
+        lock_kernel();
+        if (!(s->s_flags & MS_RDONLY))
+                mark_buffer_dirty(BFS_SB(s)->si_sbh);
+        s->s_dirt = 0;
+        unlock_kernel();
+}
+
+static kmem_cache_t * bfs_inode_cachep;
+
+static struct inode *bfs_alloc_inode(struct super_block *sb)
+{
+        struct bfs_inode_info *bi;
+        bi = kmem_cache_alloc(bfs_inode_cachep, SLAB_KERNEL);
+        if (!bi)
+                return NULL;
+        return &bi->vfs_inode;
+}
+
+static void bfs_destroy_inode(struct inode *inode)
+{
+        kmem_cache_free(bfs_inode_cachep, BFS_I(inode));
+}
+
+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+{
+        struct bfs_inode_info *bi = foo;
+
+        if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+            SLAB_CTOR_CONSTRUCTOR)
+                inode_init_once(&bi->vfs_inode);
+}
+ 
+static int init_inodecache(void)
+{
+        bfs_inode_cachep = kmem_cache_create("bfs_inode_cache",
+                                             sizeof(struct bfs_inode_info),
+                                             0, SLAB_RECLAIM_ACCOUNT,
+                                             init_once, NULL);
+        if (bfs_inode_cachep == NULL)
+                return -ENOMEM;
+        return 0;
+}
+
+static void destroy_inodecache(void)
+{
+        if (kmem_cache_destroy(bfs_inode_cachep))
+                printk(KERN_INFO "bfs_inode_cache: not all structures were freed\n");
+}
+
+static struct super_operations bfs_sops = {
+        .alloc_inode    = bfs_alloc_inode,
+        .destroy_inode  = bfs_destroy_inode,
+        .read_inode     = bfs_read_inode,
+        .write_inode    = bfs_write_inode,
+        .delete_inode   = bfs_delete_inode,
+        .put_super      = bfs_put_super,
+        .write_super    = bfs_write_super,
+        .statfs         = bfs_statfs,
+};
+
+void dump_imap(const char *prefix, struct super_block * s)
+{
+#if 0
+        int i;
+        char *tmpbuf = (char *)get_zeroed_page(GFP_KERNEL);
+
+        if (!tmpbuf)
+                return;
+        for (i=BFS_SB(s)->si_lasti; i>=0; i--) {
+                if (i>PAGE_SIZE-100) break;
+                if (test_bit(i, BFS_SB(s)->si_imap))
+                        strcat(tmpbuf, "1");
+                else
+                        strcat(tmpbuf, "0");
+        }
+        printk(KERN_ERR "BFS-fs: %s: lasti=%08lx <%s>\n", prefix, BFS_SB(s)->si_lasti, tmpbuf);
+        free_page((unsigned long)tmpbuf);
+#endif
+}
+
+static int bfs_fill_super(struct super_block *s, void *data, int silent)
+{
+        struct buffer_head * bh;
+        struct bfs_super_block * bfs_sb;
+        struct inode * inode;
+        int i, imap_len;
+        struct bfs_sb_info * info;
+
+        info = kmalloc(sizeof(*info), GFP_KERNEL);
+        if (!info)
+                return -ENOMEM;
+        s->s_fs_info = info;
+        memset(info, 0, sizeof(*info));
+
+        sb_set_blocksize(s, BFS_BSIZE);
+
+        bh = sb_bread(s, 0);
+        if(!bh)
+                goto out;
+        bfs_sb = (struct bfs_super_block *)bh->b_data;
+        if (bfs_sb->s_magic != BFS_MAGIC) {
+                if (!silent)
+                        printf("No BFS filesystem on %s (magic=%08x)\n", 
+                                s->s_id, bfs_sb->s_magic);
+                goto out;
+        }
+        if (BFS_UNCLEAN(bfs_sb, s) && !silent)
+                printf("%s is unclean, continuing\n", s->s_id);
+
+        s->s_magic = BFS_MAGIC;
+        info->si_bfs_sb = bfs_sb;
+        info->si_sbh = bh;
+        info->si_lasti = (bfs_sb->s_start - BFS_BSIZE)/sizeof(struct bfs_inode) 
+                        + BFS_ROOT_INO - 1;
+
+        imap_len = info->si_lasti/8 + 1;
+        info->si_imap = kmalloc(imap_len, GFP_KERNEL);
+        if (!info->si_imap)
+                goto out;
+        memset(info->si_imap, 0, imap_len);
+        for (i=0; i<BFS_ROOT_INO; i++) 
+                set_bit(i, info->si_imap);
+
+        s->s_op = &bfs_sops;
+        inode = iget(s, BFS_ROOT_INO);
+        if (!inode) {
+                kfree(info->si_imap);
+                goto out;
+        }
+        s->s_root = d_alloc_root(inode);
+        if (!s->s_root) {
+                iput(inode);
+                kfree(info->si_imap);
+                goto out;
+        }
+
+        info->si_blocks = (bfs_sb->s_end + 1)>>BFS_BSIZE_BITS; /* for statfs(2) */
+        info->si_freeb = (bfs_sb->s_end + 1 - bfs_sb->s_start)>>BFS_BSIZE_BITS;
+        info->si_freei = 0;
+        info->si_lf_eblk = 0;
+        info->si_lf_sblk = 0;
+        info->si_lf_ioff = 0;
+        for (i=BFS_ROOT_INO; i<=info->si_lasti; i++) {
+                inode = iget(s,i);
+                if (BFS_I(inode)->i_dsk_ino == 0)
+                        info->si_freei++;
+                else {
+                        set_bit(i, info->si_imap);
+                        info->si_freeb -= inode->i_blocks;
+                        if (BFS_I(inode)->i_eblock > info->si_lf_eblk) {
+                                info->si_lf_eblk = BFS_I(inode)->i_eblock;
+                                info->si_lf_sblk = BFS_I(inode)->i_sblock;
+                                info->si_lf_ioff = BFS_INO2OFF(i);
+                        }
+                }
+                iput(inode);
+        }
+        if (!(s->s_flags & MS_RDONLY)) {
+                mark_buffer_dirty(bh);
+                s->s_dirt = 1;
+        } 
+        dump_imap("read_super", s);
+        return 0;
+
+out:
+        brelse(bh);
+        kfree(info);
+        s->s_fs_info = NULL;
+        return -EINVAL;
+}
+
+static struct super_block *bfs_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, bfs_fill_super);
+}
+
+static struct file_system_type bfs_fs_type = {
+        .owner          = THIS_MODULE,
+        .name           = "bfs",
+        .get_sb         = bfs_get_sb,
+        .kill_sb        = kill_block_super,
+        .fs_flags       = FS_REQUIRES_DEV,
+};
+
+static int __init init_bfs_fs(void)
+{
+        int err = init_inodecache();
+        if (err)
+                goto out1;
+        err = register_filesystem(&bfs_fs_type);
+        if (err)
+                goto out;
+        return 0;
+out:
+        destroy_inodecache();
+out1:
+        return err;
+}
+
+static void __exit exit_bfs_fs(void)
+{
+        unregister_filesystem(&bfs_fs_type);
+        destroy_inodecache();
+}
+
+module_init(init_bfs_fs)
+module_exit(exit_bfs_fs)