[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/freevxfs/vxfs_inode.c b/src/kernel/linux/v4.14/fs/freevxfs/vxfs_inode.c
new file mode 100644
index 0000000..1f41b25
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/freevxfs/vxfs_inode.c
@@ -0,0 +1,341 @@
+/*
+ * 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 - inode routines.
+ */
+#include <linux/fs.h>
+#include <linux/buffer_head.h>
+#include <linux/pagemap.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/namei.h>
+
+#include "vxfs.h"
+#include "vxfs_inode.h"
+#include "vxfs_extern.h"
+
+
+#ifdef DIAGNOSTIC
+/*
+ * Dump inode contents (partially).
+ */
+void
+vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino)
+{
+ printk(KERN_DEBUG "\n\n");
+ if (ino)
+ printk(KERN_DEBUG "dumping vxfs inode %ld\n", ino);
+ else
+ printk(KERN_DEBUG "dumping unknown vxfs inode\n");
+
+ printk(KERN_DEBUG "---------------------------\n");
+ printk(KERN_DEBUG "mode is %x\n", vip->vii_mode);
+ printk(KERN_DEBUG "nlink:%u, uid:%u, gid:%u\n",
+ vip->vii_nlink, vip->vii_uid, vip->vii_gid);
+ printk(KERN_DEBUG "size:%Lx, blocks:%u\n",
+ vip->vii_size, vip->vii_blocks);
+ printk(KERN_DEBUG "orgtype:%u\n", vip->vii_orgtype);
+}
+#endif
+
+/**
+ * vxfs_transmod - mode for a VxFS inode
+ * @vip: VxFS inode
+ *
+ * Description:
+ * vxfs_transmod returns a Linux mode_t for a given
+ * VxFS inode structure.
+ */
+static __inline__ umode_t
+vxfs_transmod(struct vxfs_inode_info *vip)
+{
+ umode_t ret = vip->vii_mode & ~VXFS_TYPE_MASK;
+
+ if (VXFS_ISFIFO(vip))
+ ret |= S_IFIFO;
+ if (VXFS_ISCHR(vip))
+ ret |= S_IFCHR;
+ if (VXFS_ISDIR(vip))
+ ret |= S_IFDIR;
+ if (VXFS_ISBLK(vip))
+ ret |= S_IFBLK;
+ if (VXFS_ISLNK(vip))
+ ret |= S_IFLNK;
+ if (VXFS_ISREG(vip))
+ ret |= S_IFREG;
+ if (VXFS_ISSOC(vip))
+ ret |= S_IFSOCK;
+
+ return (ret);
+}
+
+static inline void dip2vip_cpy(struct vxfs_sb_info *sbi,
+ struct vxfs_inode_info *vip, struct vxfs_dinode *dip)
+{
+ struct inode *inode = &vip->vfs_inode;
+
+ vip->vii_mode = fs32_to_cpu(sbi, dip->vdi_mode);
+ vip->vii_nlink = fs32_to_cpu(sbi, dip->vdi_nlink);
+ vip->vii_uid = fs32_to_cpu(sbi, dip->vdi_uid);
+ vip->vii_gid = fs32_to_cpu(sbi, dip->vdi_gid);
+ vip->vii_size = fs64_to_cpu(sbi, dip->vdi_size);
+ vip->vii_atime = fs32_to_cpu(sbi, dip->vdi_atime);
+ vip->vii_autime = fs32_to_cpu(sbi, dip->vdi_autime);
+ vip->vii_mtime = fs32_to_cpu(sbi, dip->vdi_mtime);
+ vip->vii_mutime = fs32_to_cpu(sbi, dip->vdi_mutime);
+ vip->vii_ctime = fs32_to_cpu(sbi, dip->vdi_ctime);
+ vip->vii_cutime = fs32_to_cpu(sbi, dip->vdi_cutime);
+ vip->vii_orgtype = dip->vdi_orgtype;
+
+ vip->vii_blocks = fs32_to_cpu(sbi, dip->vdi_blocks);
+ vip->vii_gen = fs32_to_cpu(sbi, dip->vdi_gen);
+
+ if (VXFS_ISDIR(vip))
+ vip->vii_dotdot = fs32_to_cpu(sbi, dip->vdi_dotdot);
+ else if (!VXFS_ISREG(vip) && !VXFS_ISLNK(vip))
+ vip->vii_rdev = fs32_to_cpu(sbi, dip->vdi_rdev);
+
+ /* don't endian swap the fields that differ by orgtype */
+ memcpy(&vip->vii_org, &dip->vdi_org, sizeof(vip->vii_org));
+
+ inode->i_mode = vxfs_transmod(vip);
+ i_uid_write(inode, (uid_t)vip->vii_uid);
+ i_gid_write(inode, (gid_t)vip->vii_gid);
+
+ set_nlink(inode, vip->vii_nlink);
+ inode->i_size = vip->vii_size;
+
+ inode->i_atime.tv_sec = vip->vii_atime;
+ inode->i_ctime.tv_sec = vip->vii_ctime;
+ inode->i_mtime.tv_sec = vip->vii_mtime;
+ inode->i_atime.tv_nsec = 0;
+ inode->i_ctime.tv_nsec = 0;
+ inode->i_mtime.tv_nsec = 0;
+
+ inode->i_blocks = vip->vii_blocks;
+ inode->i_generation = vip->vii_gen;
+}
+
+/**
+ * vxfs_blkiget - find inode based on extent #
+ * @sbp: superblock of the filesystem we search in
+ * @extent: number of the extent to search
+ * @ino: inode number to search
+ *
+ * Description:
+ * vxfs_blkiget searches inode @ino in the filesystem described by
+ * @sbp in the extent @extent.
+ * Returns the matching VxFS inode on success, else a NULL pointer.
+ *
+ * NOTE:
+ * While __vxfs_iget uses the pagecache vxfs_blkiget uses the
+ * buffercache. This function should not be used outside the
+ * read_super() method, otherwise the data may be incoherent.
+ */
+struct inode *
+vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
+{
+ struct buffer_head *bp;
+ struct inode *inode;
+ u_long block, offset;
+
+ inode = new_inode(sbp);
+ if (!inode)
+ return NULL;
+ inode->i_ino = get_next_ino();
+
+ block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
+ offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
+ bp = sb_bread(sbp, block);
+
+ if (bp && buffer_mapped(bp)) {
+ struct vxfs_inode_info *vip = VXFS_INO(inode);
+ struct vxfs_dinode *dip;
+
+ dip = (struct vxfs_dinode *)(bp->b_data + offset);
+ dip2vip_cpy(VXFS_SBI(sbp), vip, dip);
+ vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
+#ifdef DIAGNOSTIC
+ vxfs_dumpi(vip, ino);
+#endif
+ brelse(bp);
+ return inode;
+ }
+
+ printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
+ brelse(bp);
+ iput(inode);
+ return NULL;
+}
+
+/**
+ * __vxfs_iget - generic find inode facility
+ * @ilistp: inode list
+ * @vip: VxFS inode to fill in
+ * @ino: inode number
+ *
+ * Description:
+ * Search the for inode number @ino in the filesystem
+ * described by @sbp. Use the specified inode table (@ilistp).
+ * Returns the matching inode on success, else an error code.
+ */
+static int
+__vxfs_iget(struct inode *ilistp, struct vxfs_inode_info *vip, ino_t ino)
+{
+ struct page *pp;
+ u_long offset;
+
+ offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE;
+ pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);
+
+ if (!IS_ERR(pp)) {
+ struct vxfs_dinode *dip;
+ caddr_t kaddr = (char *)page_address(pp);
+
+ dip = (struct vxfs_dinode *)(kaddr + offset);
+ dip2vip_cpy(VXFS_SBI(ilistp->i_sb), vip, dip);
+ vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
+#ifdef DIAGNOSTIC
+ vxfs_dumpi(vip, ino);
+#endif
+ vxfs_put_page(pp);
+ return 0;
+ }
+
+ printk(KERN_WARNING "vxfs: error on page 0x%p for inode %ld\n",
+ pp, (unsigned long)ino);
+ return PTR_ERR(pp);
+}
+
+/**
+ * vxfs_stiget - find inode using the structural inode list
+ * @sbp: VFS superblock
+ * @ino: inode #
+ *
+ * Description:
+ * Find inode @ino in the filesystem described by @sbp using
+ * the structural inode list.
+ * Returns the matching inode on success, else a NULL pointer.
+ */
+struct inode *
+vxfs_stiget(struct super_block *sbp, ino_t ino)
+{
+ struct inode *inode;
+ int error;
+
+ inode = new_inode(sbp);
+ if (!inode)
+ return NULL;
+ inode->i_ino = get_next_ino();
+
+ error = __vxfs_iget(VXFS_SBI(sbp)->vsi_stilist, VXFS_INO(inode), ino);
+ if (error) {
+ iput(inode);
+ return NULL;
+ }
+
+ return inode;
+}
+
+/**
+ * vxfs_iget - get an inode
+ * @sbp: the superblock to get the inode for
+ * @ino: the number of the inode to get
+ *
+ * Description:
+ * vxfs_read_inode creates an inode, reads the disk inode for @ino and fills
+ * in all relevant fields in the new inode.
+ */
+struct inode *
+vxfs_iget(struct super_block *sbp, ino_t ino)
+{
+ struct vxfs_inode_info *vip;
+ const struct address_space_operations *aops;
+ struct inode *ip;
+ int error;
+
+ ip = iget_locked(sbp, ino);
+ if (!ip)
+ return ERR_PTR(-ENOMEM);
+ if (!(ip->i_state & I_NEW))
+ return ip;
+
+ vip = VXFS_INO(ip);
+ error = __vxfs_iget(VXFS_SBI(sbp)->vsi_ilist, vip, ino);
+ if (error) {
+ iget_failed(ip);
+ return ERR_PTR(error);
+ }
+
+ if (VXFS_ISIMMED(vip))
+ aops = &vxfs_immed_aops;
+ else
+ aops = &vxfs_aops;
+
+ if (S_ISREG(ip->i_mode)) {
+ ip->i_fop = &generic_ro_fops;
+ ip->i_mapping->a_ops = aops;
+ } else if (S_ISDIR(ip->i_mode)) {
+ ip->i_op = &vxfs_dir_inode_ops;
+ ip->i_fop = &vxfs_dir_operations;
+ ip->i_mapping->a_ops = aops;
+ } else if (S_ISLNK(ip->i_mode)) {
+ if (!VXFS_ISIMMED(vip)) {
+ ip->i_op = &page_symlink_inode_operations;
+ inode_nohighmem(ip);
+ ip->i_mapping->a_ops = &vxfs_aops;
+ } else {
+ ip->i_op = &simple_symlink_inode_operations;
+ ip->i_link = vip->vii_immed.vi_immed;
+ nd_terminate_link(ip->i_link, ip->i_size,
+ sizeof(vip->vii_immed.vi_immed) - 1);
+ }
+ } else
+ init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev));
+
+ unlock_new_inode(ip);
+ return ip;
+}
+
+/**
+ * vxfs_evict_inode - remove inode from main memory
+ * @ip: inode to discard.
+ *
+ * Description:
+ * vxfs_evict_inode() is called on the final iput and frees the private
+ * inode area.
+ */
+void
+vxfs_evict_inode(struct inode *ip)
+{
+ truncate_inode_pages_final(&ip->i_data);
+ clear_inode(ip);
+}