1 files changed, 149 insertions, 94 deletions

diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index e37eb274e492..fabe60778658 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -1,30 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2000-2001 Christoph Hellwig.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions, and the following disclaimer,
- *    without modification.
- * 2. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL").
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
+ * Copyright (c) 2016 Krzysztof Blaszkowski
  */
 
 /*
@@ -40,7 +17,7 @@
 #include <linux/slab.h>
 #include <linux/stat.h>
 #include <linux/vfs.h>
-#include <linux/mount.h>
+#include <linux/fs_context.h>
 
 #include "vxfs.h"
 #include "vxfs_extern.h"
@@ -48,22 +25,11 @@
 #include "vxfs_inode.h"
 
 
-MODULE_AUTHOR("Christoph Hellwig");
+MODULE_AUTHOR("Christoph Hellwig, Krzysztof Blaszkowski");
 MODULE_DESCRIPTION("Veritas Filesystem (VxFS) driver");
 MODULE_LICENSE("Dual BSD/GPL");
 
-
-
-static void		vxfs_put_super(struct super_block *);
-static int		vxfs_statfs(struct dentry *, struct kstatfs *);
-static int		vxfs_remount(struct super_block *, int *, char *);
-
-static const struct super_operations vxfs_super_ops = {
-	.evict_inode =		vxfs_evict_inode,
-	.put_super =		vxfs_put_super,
-	.statfs =		vxfs_statfs,
-	.remount_fs =		vxfs_remount,
-};
+static struct kmem_cache *vxfs_inode_cachep;
 
 /**
  * vxfs_put_super - free superblock resources
@@ -79,9 +45,9 @@ vxfs_put_super(struct super_block *sbp)
 {
 	struct vxfs_sb_info	*infp = VXFS_SBI(sbp);
 
-	vxfs_put_fake_inode(infp->vsi_fship);
-	vxfs_put_fake_inode(infp->vsi_ilist);
-	vxfs_put_fake_inode(infp->vsi_stilist);
+	iput(infp->vsi_fship);
+	iput(infp->vsi_ilist);
+	iput(infp->vsi_stilist);
 
 	brelse(infp->vsi_bp);
 	kfree(infp);
@@ -109,30 +75,101 @@ static int
 vxfs_statfs(struct dentry *dentry, struct kstatfs *bufp)
 {
 	struct vxfs_sb_info		*infp = VXFS_SBI(dentry->d_sb);
+	struct vxfs_sb *raw_sb = infp->vsi_raw;
+	u64 id = huge_encode_dev(dentry->d_sb->s_bdev->bd_dev);
 
 	bufp->f_type = VXFS_SUPER_MAGIC;
 	bufp->f_bsize = dentry->d_sb->s_blocksize;
-	bufp->f_blocks = infp->vsi_raw->vs_dsize;
-	bufp->f_bfree = infp->vsi_raw->vs_free;
+	bufp->f_blocks = fs32_to_cpu(infp, raw_sb->vs_dsize);
+	bufp->f_bfree = fs32_to_cpu(infp, raw_sb->vs_free);
 	bufp->f_bavail = 0;
 	bufp->f_files = 0;
-	bufp->f_ffree = infp->vsi_raw->vs_ifree;
+	bufp->f_ffree = fs32_to_cpu(infp, raw_sb->vs_ifree);
+	bufp->f_fsid = u64_to_fsid(id);
 	bufp->f_namelen = VXFS_NAMELEN;
 
 	return 0;
 }
 
-static int vxfs_remount(struct super_block *sb, int *flags, char *data)
+static int vxfs_reconfigure(struct fs_context *fc)
 {
-	*flags |= MS_RDONLY;
+	sync_filesystem(fc->root->d_sb);
+	fc->sb_flags |= SB_RDONLY;
 	return 0;
 }
 
+static struct inode *vxfs_alloc_inode(struct super_block *sb)
+{
+	struct vxfs_inode_info *vi;
+
+	vi = alloc_inode_sb(sb, vxfs_inode_cachep, GFP_KERNEL);
+	if (!vi)
+		return NULL;
+	inode_init_once(&vi->vfs_inode);
+	return &vi->vfs_inode;
+}
+
+static void vxfs_free_inode(struct inode *inode)
+{
+	kmem_cache_free(vxfs_inode_cachep, VXFS_INO(inode));
+}
+
+static const struct super_operations vxfs_super_ops = {
+	.alloc_inode		= vxfs_alloc_inode,
+	.free_inode		= vxfs_free_inode,
+	.evict_inode		= vxfs_evict_inode,
+	.put_super		= vxfs_put_super,
+	.statfs			= vxfs_statfs,
+};
+
+static int vxfs_try_sb_magic(struct super_block *sbp, struct fs_context *fc,
+		unsigned blk, __fs32 magic)
+{
+	struct buffer_head *bp;
+	struct vxfs_sb *rsbp;
+	struct vxfs_sb_info *infp = VXFS_SBI(sbp);
+	int silent = fc->sb_flags & SB_SILENT;
+	int rc = -ENOMEM;
+
+	bp = sb_bread(sbp, blk);
+	do {
+		if (!bp || !buffer_mapped(bp)) {
+			if (!silent) {
+				warnf(fc,
+				      "vxfs: unable to read disk superblock at %u",
+				      blk);
+			}
+			break;
+		}
+
+		rc = -EINVAL;
+		rsbp = (struct vxfs_sb *)bp->b_data;
+		if (rsbp->vs_magic != magic) {
+			if (!silent)
+				infof(fc,
+				      "vxfs: WRONG superblock magic %08x at %u",
+				      rsbp->vs_magic, blk);
+			break;
+		}
+
+		rc = 0;
+		infp->vsi_raw = rsbp;
+		infp->vsi_bp = bp;
+	} while (0);
+
+	if (rc) {
+		infp->vsi_raw = NULL;
+		infp->vsi_bp = NULL;
+		brelse(bp);
+	}
+
+	return rc;
+}
+
 /**
- * vxfs_read_super - read superblock into memory and initialize filesystem
+ * vxfs_fill_super - read superblock into memory and initialize filesystem
  * @sbp:		VFS superblock (to fill)
- * @dp:			fs private mount data
- * @silent:		do not complain loudly when sth is wrong
+ * @fc:			filesytem context
  *
  * Description:
  *   We are called on the first mount of a filesystem to read the
@@ -144,80 +181,83 @@ static int vxfs_remount(struct super_block *sb, int *flags, char *data)
  * Locking:
  *   We are under @sbp->s_lock.
  */
-static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
+static int vxfs_fill_super(struct super_block *sbp, struct fs_context *fc)
 {
 	struct vxfs_sb_info	*infp;
 	struct vxfs_sb		*rsbp;
-	struct buffer_head	*bp = NULL;
 	u_long			bsize;
 	struct inode *root;
 	int ret = -EINVAL;
+	int silent = fc->sb_flags & SB_SILENT;
+	u32 j;
 
-	sbp->s_flags |= MS_RDONLY;
+	sbp->s_flags |= SB_RDONLY;
 
 	infp = kzalloc(sizeof(*infp), GFP_KERNEL);
 	if (!infp) {
-		printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
+		warnf(fc, "vxfs: unable to allocate incore superblock");
 		return -ENOMEM;
 	}
 
 	bsize = sb_min_blocksize(sbp, BLOCK_SIZE);
 	if (!bsize) {
-		printk(KERN_WARNING "vxfs: unable to set blocksize\n");
+		warnf(fc, "vxfs: unable to set blocksize");
 		goto out;
 	}
 
-	bp = sb_bread(sbp, 1);
-	if (!bp || !buffer_mapped(bp)) {
-		if (!silent) {
-			printk(KERN_WARNING
-				"vxfs: unable to read disk superblock\n");
-		}
-		goto out;
-	}
-
-	rsbp = (struct vxfs_sb *)bp->b_data;
-	if (rsbp->vs_magic != VXFS_SUPER_MAGIC) {
+	sbp->s_op = &vxfs_super_ops;
+	sbp->s_fs_info = infp;
+	sbp->s_time_min = 0;
+	sbp->s_time_max = U32_MAX;
+
+	if (!vxfs_try_sb_magic(sbp, fc, 1,
+			(__force __fs32)cpu_to_le32(VXFS_SUPER_MAGIC))) {
+		/* Unixware, x86 */
+		infp->byte_order = VXFS_BO_LE;
+	} else if (!vxfs_try_sb_magic(sbp, fc, 8,
+			(__force __fs32)cpu_to_be32(VXFS_SUPER_MAGIC))) {
+		/* HP-UX, parisc */
+		infp->byte_order = VXFS_BO_BE;
+	} else {
 		if (!silent)
-			printk(KERN_NOTICE "vxfs: WRONG superblock magic\n");
+			infof(fc, "vxfs: can't find superblock.");
 		goto out;
 	}
 
-	if ((rsbp->vs_version < 2 || rsbp->vs_version > 4) && !silent) {
-		printk(KERN_NOTICE "vxfs: unsupported VxFS version (%d)\n",
-		       rsbp->vs_version);
+	rsbp = infp->vsi_raw;
+	j = fs32_to_cpu(infp, rsbp->vs_version);
+	if ((j < 2 || j > 4) && !silent) {
+		infof(fc, "vxfs: unsupported VxFS version (%d)", j);
 		goto out;
 	}
 
 #ifdef DIAGNOSTIC
-	printk(KERN_DEBUG "vxfs: supported VxFS version (%d)\n", rsbp->vs_version);
-	printk(KERN_DEBUG "vxfs: blocksize: %d\n", rsbp->vs_bsize);
+	printk(KERN_DEBUG "vxfs: supported VxFS version (%d)\n", j);
+	printk(KERN_DEBUG "vxfs: blocksize: %d\n",
+		fs32_to_cpu(infp, rsbp->vs_bsize));
 #endif
 
-	sbp->s_magic = rsbp->vs_magic;
-	sbp->s_fs_info = infp;
+	sbp->s_magic = fs32_to_cpu(infp, rsbp->vs_magic);
 
-	infp->vsi_raw = rsbp;
-	infp->vsi_bp = bp;
-	infp->vsi_oltext = rsbp->vs_oltext[0];
-	infp->vsi_oltsize = rsbp->vs_oltsize;
+	infp->vsi_oltext = fs32_to_cpu(infp, rsbp->vs_oltext[0]);
+	infp->vsi_oltsize = fs32_to_cpu(infp, rsbp->vs_oltsize);
 
-	if (!sb_set_blocksize(sbp, rsbp->vs_bsize)) {
-		printk(KERN_WARNING "vxfs: unable to set final block size\n");
+	j = fs32_to_cpu(infp, rsbp->vs_bsize);
+	if (!sb_set_blocksize(sbp, j)) {
+		warnf(fc, "vxfs: unable to set final block size");
 		goto out;
 	}
 
 	if (vxfs_read_olt(sbp, bsize)) {
-		printk(KERN_WARNING "vxfs: unable to read olt\n");
+		warnf(fc, "vxfs: unable to read olt");
 		goto out;
 	}
 
 	if (vxfs_read_fshead(sbp)) {
-		printk(KERN_WARNING "vxfs: unable to read fshead\n");
+		warnf(fc, "vxfs: unable to read fshead");
 		goto out;
 	}
 
-	sbp->s_op = &vxfs_super_ops;
 	root = vxfs_iget(sbp, VXFS_ROOT_INO);
 	if (IS_ERR(root)) {
 		ret = PTR_ERR(root);
@@ -225,18 +265,18 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
 	}
 	sbp->s_root = d_make_root(root);
 	if (!sbp->s_root) {
-		printk(KERN_WARNING "vxfs: unable to get root dentry.\n");
+		warnf(fc, "vxfs: unable to get root dentry.");
 		goto out_free_ilist;
 	}
 
 	return 0;
 	
 out_free_ilist:
-	vxfs_put_fake_inode(infp->vsi_fship);
-	vxfs_put_fake_inode(infp->vsi_ilist);
-	vxfs_put_fake_inode(infp->vsi_stilist);
+	iput(infp->vsi_fship);
+	iput(infp->vsi_ilist);
+	iput(infp->vsi_stilist);
 out:
-	brelse(bp);
+	brelse(infp->vsi_bp);
 	kfree(infp);
 	return ret;
 }
@@ -244,18 +284,29 @@ out:
 /*
  * The usual module blurb.
  */
-static struct dentry *vxfs_mount(struct file_system_type *fs_type,
-	int flags, const char *dev_name, void *data)
+static int vxfs_get_tree(struct fs_context *fc)
 {
-	return mount_bdev(fs_type, flags, dev_name, data, vxfs_fill_super);
+	return get_tree_bdev(fc, vxfs_fill_super);
+}
+
+static const struct fs_context_operations vxfs_context_ops = {
+	.get_tree	= vxfs_get_tree,
+	.reconfigure	= vxfs_reconfigure,
+};
+
+static int vxfs_init_fs_context(struct fs_context *fc)
+{
+	fc->ops = &vxfs_context_ops;
+
+	return 0;
 }
 
 static struct file_system_type vxfs_fs_type = {
 	.owner		= THIS_MODULE,
 	.name		= "vxfs",
-	.mount		= vxfs_mount,
 	.kill_sb	= kill_block_super,
 	.fs_flags	= FS_REQUIRES_DEV,
+	.init_fs_context = vxfs_init_fs_context,
 };
 MODULE_ALIAS_FS("vxfs"); /* makes mount -t vxfs autoload the module */
 MODULE_ALIAS("vxfs");
@@ -265,9 +316,13 @@ vxfs_init(void)
 {
 	int rv;
 
-	vxfs_inode_cachep = kmem_cache_create("vxfs_inode",
+	vxfs_inode_cachep = kmem_cache_create_usercopy("vxfs_inode",
 			sizeof(struct vxfs_inode_info), 0,
-			SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL);
+			SLAB_RECLAIM_ACCOUNT,
+			offsetof(struct vxfs_inode_info, vii_immed.vi_immed),
+			sizeof_field(struct vxfs_inode_info,
+				vii_immed.vi_immed),
+			NULL);
 	if (!vxfs_inode_cachep)
 		return -ENOMEM;
 	rv = register_filesystem(&vxfs_fs_type);