[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/freevxfs/vxfs_super.c b/src/kernel/linux/v4.14/fs/freevxfs/vxfs_super.c
new file mode 100644
index 0000000..455ce5b
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/freevxfs/vxfs_super.c
@@ -0,0 +1,359 @@
+/*
+ * Copyright (c) 2000-2001 Christoph Hellwig.
+ * Copyright (c) 2016 Krzysztof Blaszkowski
+ * 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.
+ */
+
+/*
+ * Veritas filesystem driver - superblock related routines.
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <linux/blkdev.h>
+#include <linux/fs.h>
+#include <linux/buffer_head.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/vfs.h>
+#include <linux/mount.h>
+
+#include "vxfs.h"
+#include "vxfs_extern.h"
+#include "vxfs_dir.h"
+#include "vxfs_inode.h"
+
+
+MODULE_AUTHOR("Christoph Hellwig, Krzysztof Blaszkowski");
+MODULE_DESCRIPTION("Veritas Filesystem (VxFS) driver");
+MODULE_LICENSE("Dual BSD/GPL");
+
+static struct kmem_cache *vxfs_inode_cachep;
+
+/**
+ * vxfs_put_super - free superblock resources
+ * @sbp: VFS superblock.
+ *
+ * Description:
+ * vxfs_put_super frees all resources allocated for @sbp
+ * after the last instance of the filesystem is unmounted.
+ */
+
+static void
+vxfs_put_super(struct super_block *sbp)
+{
+ struct vxfs_sb_info *infp = VXFS_SBI(sbp);
+
+ iput(infp->vsi_fship);
+ iput(infp->vsi_ilist);
+ iput(infp->vsi_stilist);
+
+ brelse(infp->vsi_bp);
+ kfree(infp);
+}
+
+/**
+ * vxfs_statfs - get filesystem information
+ * @dentry: VFS dentry to locate superblock
+ * @bufp: output buffer
+ *
+ * Description:
+ * vxfs_statfs fills the statfs buffer @bufp with information
+ * about the filesystem described by @dentry.
+ *
+ * Returns:
+ * Zero.
+ *
+ * Locking:
+ * No locks held.
+ *
+ * Notes:
+ * This is everything but complete...
+ */
+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;
+
+ bufp->f_type = VXFS_SUPER_MAGIC;
+ bufp->f_bsize = dentry->d_sb->s_blocksize;
+ 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 = fs32_to_cpu(infp, raw_sb->vs_ifree);
+ bufp->f_namelen = VXFS_NAMELEN;
+
+ return 0;
+}
+
+static int vxfs_remount(struct super_block *sb, int *flags, char *data)
+{
+ sync_filesystem(sb);
+ *flags |= MS_RDONLY;
+ return 0;
+}
+
+static struct inode *vxfs_alloc_inode(struct super_block *sb)
+{
+ struct vxfs_inode_info *vi;
+
+ vi = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL);
+ if (!vi)
+ return NULL;
+ inode_init_once(&vi->vfs_inode);
+ return &vi->vfs_inode;
+}
+
+static void vxfs_i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+
+ kmem_cache_free(vxfs_inode_cachep, VXFS_INO(inode));
+}
+
+static void vxfs_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, vxfs_i_callback);
+}
+
+static const struct super_operations vxfs_super_ops = {
+ .alloc_inode = vxfs_alloc_inode,
+ .destroy_inode = vxfs_destroy_inode,
+ .evict_inode = vxfs_evict_inode,
+ .put_super = vxfs_put_super,
+ .statfs = vxfs_statfs,
+ .remount_fs = vxfs_remount,
+};
+
+static int vxfs_try_sb_magic(struct super_block *sbp, int silent,
+ unsigned blk, __fs32 magic)
+{
+ struct buffer_head *bp;
+ struct vxfs_sb *rsbp;
+ struct vxfs_sb_info *infp = VXFS_SBI(sbp);
+ int rc = -ENOMEM;
+
+ bp = sb_bread(sbp, blk);
+ do {
+ if (!bp || !buffer_mapped(bp)) {
+ if (!silent) {
+ printk(KERN_WARNING
+ "vxfs: unable to read disk superblock at %u\n",
+ blk);
+ }
+ break;
+ }
+
+ rc = -EINVAL;
+ rsbp = (struct vxfs_sb *)bp->b_data;
+ if (rsbp->vs_magic != magic) {
+ if (!silent)
+ printk(KERN_NOTICE
+ "vxfs: WRONG superblock magic %08x at %u\n",
+ 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
+ * @sbp: VFS superblock (to fill)
+ * @dp: fs private mount data
+ * @silent: do not complain loudly when sth is wrong
+ *
+ * Description:
+ * We are called on the first mount of a filesystem to read the
+ * superblock into memory and do some basic setup.
+ *
+ * Returns:
+ * The superblock on success, else %NULL.
+ *
+ * Locking:
+ * We are under @sbp->s_lock.
+ */
+static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
+{
+ struct vxfs_sb_info *infp;
+ struct vxfs_sb *rsbp;
+ u_long bsize;
+ struct inode *root;
+ int ret = -EINVAL;
+ u32 j;
+
+ sbp->s_flags |= MS_RDONLY;
+
+ infp = kzalloc(sizeof(*infp), GFP_KERNEL);
+ if (!infp) {
+ printk(KERN_WARNING "vxfs: unable to allocate incore superblock\n");
+ return -ENOMEM;
+ }
+
+ bsize = sb_min_blocksize(sbp, BLOCK_SIZE);
+ if (!bsize) {
+ printk(KERN_WARNING "vxfs: unable to set blocksize\n");
+ goto out;
+ }
+
+ sbp->s_op = &vxfs_super_ops;
+ sbp->s_fs_info = infp;
+
+ if (!vxfs_try_sb_magic(sbp, silent, 1,
+ (__force __fs32)cpu_to_le32(VXFS_SUPER_MAGIC))) {
+ /* Unixware, x86 */
+ infp->byte_order = VXFS_BO_LE;
+ } else if (!vxfs_try_sb_magic(sbp, silent, 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: can't find superblock.\n");
+ goto out;
+ }
+
+ rsbp = infp->vsi_raw;
+ j = fs32_to_cpu(infp, rsbp->vs_version);
+ if ((j < 2 || j > 4) && !silent) {
+ printk(KERN_NOTICE "vxfs: unsupported VxFS version (%d)\n", j);
+ goto out;
+ }
+
+#ifdef DIAGNOSTIC
+ 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 = fs32_to_cpu(infp, rsbp->vs_magic);
+
+ infp->vsi_oltext = fs32_to_cpu(infp, rsbp->vs_oltext[0]);
+ infp->vsi_oltsize = fs32_to_cpu(infp, rsbp->vs_oltsize);
+
+ j = fs32_to_cpu(infp, rsbp->vs_bsize);
+ if (!sb_set_blocksize(sbp, j)) {
+ printk(KERN_WARNING "vxfs: unable to set final block size\n");
+ goto out;
+ }
+
+ if (vxfs_read_olt(sbp, bsize)) {
+ printk(KERN_WARNING "vxfs: unable to read olt\n");
+ goto out;
+ }
+
+ if (vxfs_read_fshead(sbp)) {
+ printk(KERN_WARNING "vxfs: unable to read fshead\n");
+ goto out;
+ }
+
+ root = vxfs_iget(sbp, VXFS_ROOT_INO);
+ if (IS_ERR(root)) {
+ ret = PTR_ERR(root);
+ goto out;
+ }
+ sbp->s_root = d_make_root(root);
+ if (!sbp->s_root) {
+ printk(KERN_WARNING "vxfs: unable to get root dentry.\n");
+ goto out_free_ilist;
+ }
+
+ return 0;
+
+out_free_ilist:
+ iput(infp->vsi_fship);
+ iput(infp->vsi_ilist);
+ iput(infp->vsi_stilist);
+out:
+ brelse(infp->vsi_bp);
+ kfree(infp);
+ return ret;
+}
+
+/*
+ * The usual module blurb.
+ */
+static struct dentry *vxfs_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data)
+{
+ return mount_bdev(fs_type, flags, dev_name, data, vxfs_fill_super);
+}
+
+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,
+};
+MODULE_ALIAS_FS("vxfs"); /* makes mount -t vxfs autoload the module */
+MODULE_ALIAS("vxfs");
+
+static int __init
+vxfs_init(void)
+{
+ int rv;
+
+ vxfs_inode_cachep = kmem_cache_create("vxfs_inode",
+ sizeof(struct vxfs_inode_info), 0,
+ SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL);
+ if (!vxfs_inode_cachep)
+ return -ENOMEM;
+ rv = register_filesystem(&vxfs_fs_type);
+ if (rv < 0)
+ kmem_cache_destroy(vxfs_inode_cachep);
+ return rv;
+}
+
+static void __exit
+vxfs_cleanup(void)
+{
+ unregister_filesystem(&vxfs_fs_type);
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
+ kmem_cache_destroy(vxfs_inode_cachep);
+}
+
+module_init(vxfs_init);
+module_exit(vxfs_cleanup);