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, 343 insertions, 0 deletions

diff --git a/fs/efs/super.c b/fs/efs/super.c
new file mode 100644
index 000000000000..d8d5ea9a9997
--- /dev/null
+++ b/fs/efs/super.c
@@ -0,0 +1,343 @@
+/*
+ * super.c
+ *
+ * Copyright (c) 1999 Al Smith
+ *
+ * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/efs_fs.h>
+#include <linux/efs_vh.h>
+#include <linux/efs_fs_sb.h>
+#include <linux/slab.h>
+#include <linux/buffer_head.h>
+#include <linux/vfs.h>
+
+static int efs_statfs(struct super_block *s, struct kstatfs *buf);
+static int efs_fill_super(struct super_block *s, void *d, int silent);
+
+static struct super_block *efs_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, efs_fill_super);
+}
+
+static struct file_system_type efs_fs_type = {
+        .owner          = THIS_MODULE,
+        .name           = "efs",
+        .get_sb         = efs_get_sb,
+        .kill_sb        = kill_block_super,
+        .fs_flags       = FS_REQUIRES_DEV,
+};
+
+static struct pt_types sgi_pt_types[] = {
+        {0x00,          "SGI vh"},
+        {0x01,          "SGI trkrepl"},
+        {0x02,          "SGI secrepl"},
+        {0x03,          "SGI raw"},
+        {0x04,          "SGI bsd"},
+        {SGI_SYSV,      "SGI sysv"},
+        {0x06,          "SGI vol"},
+        {SGI_EFS,       "SGI efs"},
+        {0x08,          "SGI lv"},
+        {0x09,          "SGI rlv"},
+        {0x0A,          "SGI xfs"},
+        {0x0B,          "SGI xfslog"},
+        {0x0C,          "SGI xlv"},
+        {0x82,          "Linux swap"},
+        {0x83,          "Linux native"},
+        {0,             NULL}
+};
+
+
+static kmem_cache_t * efs_inode_cachep;
+
+static struct inode *efs_alloc_inode(struct super_block *sb)
+{
+        struct efs_inode_info *ei;
+        ei = (struct efs_inode_info *)kmem_cache_alloc(efs_inode_cachep, SLAB_KERNEL);
+        if (!ei)
+                return NULL;
+        return &ei->vfs_inode;
+}
+
+static void efs_destroy_inode(struct inode *inode)
+{
+        kmem_cache_free(efs_inode_cachep, INODE_INFO(inode));
+}
+
+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+{
+        struct efs_inode_info *ei = (struct efs_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)
+{
+        efs_inode_cachep = kmem_cache_create("efs_inode_cache",
+                                sizeof(struct efs_inode_info),
+                                0, SLAB_RECLAIM_ACCOUNT,
+                                init_once, NULL);
+        if (efs_inode_cachep == NULL)
+                return -ENOMEM;
+        return 0;
+}
+
+static void destroy_inodecache(void)
+{
+        if (kmem_cache_destroy(efs_inode_cachep))
+                printk(KERN_INFO "efs_inode_cache: not all structures were freed\n");
+}
+
+static void efs_put_super(struct super_block *s)
+{
+        kfree(s->s_fs_info);
+        s->s_fs_info = NULL;
+}
+
+static int efs_remount(struct super_block *sb, int *flags, char *data)
+{
+        *flags |= MS_RDONLY;
+        return 0;
+}
+
+static struct super_operations efs_superblock_operations = {
+        .alloc_inode    = efs_alloc_inode,
+        .destroy_inode  = efs_destroy_inode,
+        .read_inode     = efs_read_inode,
+        .put_super      = efs_put_super,
+        .statfs         = efs_statfs,
+        .remount_fs     = efs_remount,
+};
+
+static struct export_operations efs_export_ops = {
+        .get_parent     = efs_get_parent,
+};
+
+static int __init init_efs_fs(void) {
+        int err;
+        printk("EFS: "EFS_VERSION" - http://aeschi.ch.eu.org/efs/\n");
+        err = init_inodecache();
+        if (err)
+                goto out1;
+        err = register_filesystem(&efs_fs_type);
+        if (err)
+                goto out;
+        return 0;
+out:
+        destroy_inodecache();
+out1:
+        return err;
+}
+
+static void __exit exit_efs_fs(void) {
+        unregister_filesystem(&efs_fs_type);
+        destroy_inodecache();
+}
+
+module_init(init_efs_fs)
+module_exit(exit_efs_fs)
+
+static efs_block_t efs_validate_vh(struct volume_header *vh) {
+        int             i;
+        __be32          cs, *ui;
+        int             csum;
+        efs_block_t     sblock = 0; /* shuts up gcc */
+        struct pt_types *pt_entry;
+        int             pt_type, slice = -1;
+
+        if (be32_to_cpu(vh->vh_magic) != VHMAGIC) {
+                /*
+                 * assume that we're dealing with a partition and allow
+                 * read_super() to try and detect a valid superblock
+                 * on the next block.
+                 */
+                return 0;
+        }
+
+        ui = ((__be32 *) (vh + 1)) - 1;
+        for(csum = 0; ui >= ((__be32 *) vh);) {
+                cs = *ui--;
+                csum += be32_to_cpu(cs);
+        }
+        if (csum) {
+                printk(KERN_INFO "EFS: SGI disklabel: checksum bad, label corrupted\n");
+                return 0;
+        }
+
+#ifdef DEBUG
+        printk(KERN_DEBUG "EFS: bf: \"%16s\"\n", vh->vh_bootfile);
+
+        for(i = 0; i < NVDIR; i++) {
+                int     j;
+                char    name[VDNAMESIZE+1];
+
+                for(j = 0; j < VDNAMESIZE; j++) {
+                        name[j] = vh->vh_vd[i].vd_name[j];
+                }
+                name[j] = (char) 0;
+
+                if (name[0]) {
+                        printk(KERN_DEBUG "EFS: vh: %8s block: 0x%08x size: 0x%08x\n",
+                                name,
+                                (int) be32_to_cpu(vh->vh_vd[i].vd_lbn),
+                                (int) be32_to_cpu(vh->vh_vd[i].vd_nbytes));
+                }
+        }
+#endif
+
+        for(i = 0; i < NPARTAB; i++) {
+                pt_type = (int) be32_to_cpu(vh->vh_pt[i].pt_type);
+                for(pt_entry = sgi_pt_types; pt_entry->pt_name; pt_entry++) {
+                        if (pt_type == pt_entry->pt_type) break;
+                }
+#ifdef DEBUG
+                if (be32_to_cpu(vh->vh_pt[i].pt_nblks)) {
+                        printk(KERN_DEBUG "EFS: pt %2d: start: %08d size: %08d type: 0x%02x (%s)\n",
+                                i,
+                                (int) be32_to_cpu(vh->vh_pt[i].pt_firstlbn),
+                                (int) be32_to_cpu(vh->vh_pt[i].pt_nblks),
+                                pt_type,
+                                (pt_entry->pt_name) ? pt_entry->pt_name : "unknown");
+                }
+#endif
+                if (IS_EFS(pt_type)) {
+                        sblock = be32_to_cpu(vh->vh_pt[i].pt_firstlbn);
+                        slice = i;
+                }
+        }
+
+        if (slice == -1) {
+                printk(KERN_NOTICE "EFS: partition table contained no EFS partitions\n");
+#ifdef DEBUG
+        } else {
+                printk(KERN_INFO "EFS: using slice %d (type %s, offset 0x%x)\n",
+                        slice,
+                        (pt_entry->pt_name) ? pt_entry->pt_name : "unknown",
+                        sblock);
+#endif
+        }
+        return(sblock);
+}
+
+static int efs_validate_super(struct efs_sb_info *sb, struct efs_super *super) {
+
+        if (!IS_EFS_MAGIC(be32_to_cpu(super->fs_magic))) return -1;
+
+        sb->fs_magic     = be32_to_cpu(super->fs_magic);
+        sb->total_blocks = be32_to_cpu(super->fs_size);
+        sb->first_block  = be32_to_cpu(super->fs_firstcg);
+        sb->group_size   = be32_to_cpu(super->fs_cgfsize);
+        sb->data_free    = be32_to_cpu(super->fs_tfree);
+        sb->inode_free   = be32_to_cpu(super->fs_tinode);
+        sb->inode_blocks = be16_to_cpu(super->fs_cgisize);
+        sb->total_groups = be16_to_cpu(super->fs_ncg);
+    
+        return 0;    
+}
+
+static int efs_fill_super(struct super_block *s, void *d, int silent)
+{
+        struct efs_sb_info *sb;
+        struct buffer_head *bh;
+        struct inode *root;
+
+        sb = kmalloc(sizeof(struct efs_sb_info), GFP_KERNEL);
+        if (!sb)
+                return -ENOMEM;
+        s->s_fs_info = sb;
+        memset(sb, 0, sizeof(struct efs_sb_info));
+ 
+        s->s_magic              = EFS_SUPER_MAGIC;
+        if (!sb_set_blocksize(s, EFS_BLOCKSIZE)) {
+                printk(KERN_ERR "EFS: device does not support %d byte blocks\n",
+                        EFS_BLOCKSIZE);
+                goto out_no_fs_ul;
+        }
+  
+        /* read the vh (volume header) block */
+        bh = sb_bread(s, 0);
+
+        if (!bh) {
+                printk(KERN_ERR "EFS: cannot read volume header\n");
+                goto out_no_fs_ul;
+        }
+
+        /*
+         * if this returns zero then we didn't find any partition table.
+         * this isn't (yet) an error - just assume for the moment that
+         * the device is valid and go on to search for a superblock.
+         */
+        sb->fs_start = efs_validate_vh((struct volume_header *) bh->b_data);
+        brelse(bh);
+
+        if (sb->fs_start == -1) {
+                goto out_no_fs_ul;
+        }
+
+        bh = sb_bread(s, sb->fs_start + EFS_SUPER);
+        if (!bh) {
+                printk(KERN_ERR "EFS: cannot read superblock\n");
+                goto out_no_fs_ul;
+        }
+                
+        if (efs_validate_super(sb, (struct efs_super *) bh->b_data)) {
+#ifdef DEBUG
+                printk(KERN_WARNING "EFS: invalid superblock at block %u\n", sb->fs_start + EFS_SUPER);
+#endif
+                brelse(bh);
+                goto out_no_fs_ul;
+        }
+        brelse(bh);
+
+        if (!(s->s_flags & MS_RDONLY)) {
+#ifdef DEBUG
+                printk(KERN_INFO "EFS: forcing read-only mode\n");
+#endif
+                s->s_flags |= MS_RDONLY;
+        }
+        s->s_op   = &efs_superblock_operations;
+        s->s_export_op = &efs_export_ops;
+        root = iget(s, EFS_ROOTINODE);
+        s->s_root = d_alloc_root(root);
+ 
+        if (!(s->s_root)) {
+                printk(KERN_ERR "EFS: get root inode failed\n");
+                iput(root);
+                goto out_no_fs;
+        }
+
+        return 0;
+
+out_no_fs_ul:
+out_no_fs:
+        s->s_fs_info = NULL;
+        kfree(sb);
+        return -EINVAL;
+}
+
+static int efs_statfs(struct super_block *s, struct kstatfs *buf) {
+        struct efs_sb_info *sb = SUPER_INFO(s);
+
+        buf->f_type    = EFS_SUPER_MAGIC;       /* efs magic number */
+        buf->f_bsize   = EFS_BLOCKSIZE;         /* blocksize */
+        buf->f_blocks  = sb->total_groups *     /* total data blocks */
+                        (sb->group_size - sb->inode_blocks);
+        buf->f_bfree   = sb->data_free;         /* free data blocks */
+        buf->f_bavail  = sb->data_free;         /* free blocks for non-root */
+        buf->f_files   = sb->total_groups *     /* total inodes */
+                        sb->inode_blocks *
+                        (EFS_BLOCKSIZE / sizeof(struct efs_dinode));
+        buf->f_ffree   = sb->inode_free;        /* free inodes */
+        buf->f_fsid.val[0] = (sb->fs_magic >> 16) & 0xffff; /* fs ID */
+        buf->f_fsid.val[1] =  sb->fs_magic        & 0xffff; /* fs ID */
+        buf->f_namelen = EFS_MAXNAMELEN;        /* max filename length */
+
+        return 0;
+}
+