1 files changed, 351 insertions, 0 deletions

diff --git a/fs/freevxfs/vxfs_inode.c b/fs/freevxfs/vxfs_inode.c
new file mode 100644
index 000000000000..9672d2facffe
--- /dev/null
+++ b/fs/freevxfs/vxfs_inode.c
@@ -0,0 +1,351 @@
+/*
+ * 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.
+ */
+
+/*
+ * 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 "vxfs.h"
+#include "vxfs_inode.h"
+#include "vxfs_extern.h"
+
+
+extern struct address_space_operations vxfs_aops;
+extern struct address_space_operations vxfs_immed_aops;
+
+extern struct inode_operations vxfs_immed_symlink_iops;
+
+static struct file_operations vxfs_file_operations = {
+        .open =                 generic_file_open,
+        .llseek =               generic_file_llseek,
+        .read =                 generic_file_read,
+        .mmap =                 generic_file_mmap,
+        .sendfile =             generic_file_sendfile,
+};
+
+
+kmem_cache_t            *vxfs_inode_cachep;
+
+
+#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_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 vxfs_inode_info *
+vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
+{
+        struct buffer_head              *bp;
+        u_long                          block, offset;
+
+        block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
+        offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
+        bp = sb_bread(sbp, block);
+
+        if (buffer_mapped(bp)) {
+                struct vxfs_inode_info  *vip;
+                struct vxfs_dinode      *dip;
+
+                if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, SLAB_KERNEL)))
+                        goto fail;
+                dip = (struct vxfs_dinode *)(bp->b_data + offset);
+                memcpy(vip, dip, sizeof(*vip));
+#ifdef DIAGNOSTIC
+                vxfs_dumpi(vip, ino);
+#endif
+                brelse(bp);
+                return (vip);
+        }
+
+fail:
+        printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
+        brelse(bp);
+        return NULL;
+}
+
+/**
+ * __vxfs_iget - generic find inode facility
+ * @sbp:                VFS superblock
+ * @ino:                inode number
+ * @ilistp:             inode list
+ *
+ * Description:
+ *  Search the for inode number @ino in the filesystem
+ *  described by @sbp.  Use the specified inode table (@ilistp).
+ *  Returns the matching VxFS inode on success, else a NULL pointer.
+ */
+static struct vxfs_inode_info *
+__vxfs_iget(ino_t ino, struct inode *ilistp)
+{
+        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_inode_info  *vip;
+                struct vxfs_dinode      *dip;
+                caddr_t                 kaddr = (char *)page_address(pp);
+
+                if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, SLAB_KERNEL)))
+                        goto fail;
+                dip = (struct vxfs_dinode *)(kaddr + offset);
+                memcpy(vip, dip, sizeof(*vip));
+#ifdef DIAGNOSTIC
+                vxfs_dumpi(vip, ino);
+#endif
+                vxfs_put_page(pp);
+                return (vip);
+        }
+
+        printk(KERN_WARNING "vxfs: error on page %p\n", pp);
+        return NULL;
+
+fail:
+        printk(KERN_WARNING "vxfs: unable to read inode %ld\n", (unsigned long)ino);
+        vxfs_put_page(pp);
+        return NULL;
+}
+
+/**
+ * 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 VxFS inode on success, else a NULL pointer.
+ */
+struct vxfs_inode_info *
+vxfs_stiget(struct super_block *sbp, ino_t ino)
+{
+        return __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_stilist);
+}
+
+/**
+ * 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__ mode_t
+vxfs_transmod(struct vxfs_inode_info *vip)
+{
+        mode_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);
+}
+
+/**
+ * vxfs_iinit- helper to fill inode fields
+ * @ip:         VFS inode
+ * @vip:        VxFS inode
+ *
+ * Description:
+ *  vxfs_instino is a helper function to fill in all relevant
+ *  fields in @ip from @vip.
+ */
+static void
+vxfs_iinit(struct inode *ip, struct vxfs_inode_info *vip)
+{
+
+        ip->i_mode = vxfs_transmod(vip);
+        ip->i_uid = (uid_t)vip->vii_uid;
+        ip->i_gid = (gid_t)vip->vii_gid;
+
+        ip->i_nlink = vip->vii_nlink;
+        ip->i_size = vip->vii_size;
+
+        ip->i_atime.tv_sec = vip->vii_atime;
+        ip->i_ctime.tv_sec = vip->vii_ctime;
+        ip->i_mtime.tv_sec = vip->vii_mtime;
+        ip->i_atime.tv_nsec = 0;
+        ip->i_ctime.tv_nsec = 0;
+        ip->i_mtime.tv_nsec = 0;
+
+        ip->i_blksize = PAGE_SIZE;
+        ip->i_blocks = vip->vii_blocks;
+        ip->i_generation = vip->vii_gen;
+
+        ip->u.generic_ip = (void *)vip;
+        
+}
+
+/**
+ * vxfs_get_fake_inode - get fake inode structure
+ * @sbp:                filesystem superblock
+ * @vip:                fspriv inode
+ *
+ * Description:
+ *  vxfs_fake_inode gets a fake inode (not in the inode hash) for a
+ *  superblock, vxfs_inode pair.
+ *  Returns the filled VFS inode.
+ */
+struct inode *
+vxfs_get_fake_inode(struct super_block *sbp, struct vxfs_inode_info *vip)
+{
+        struct inode                    *ip = NULL;
+
+        if ((ip = new_inode(sbp))) {
+                vxfs_iinit(ip, vip);
+                ip->i_mapping->a_ops = &vxfs_aops;
+        }
+        return (ip);
+}
+
+/**
+ * vxfs_put_fake_inode - free faked inode
+ * *ip:                 VFS inode
+ *
+ * Description:
+ *  vxfs_put_fake_inode frees all data asssociated with @ip.
+ */
+void
+vxfs_put_fake_inode(struct inode *ip)
+{
+        iput(ip);
+}
+
+/**
+ * vxfs_read_inode - fill in inode information
+ * @ip:         inode pointer to fill
+ *
+ * Description:
+ *  vxfs_read_inode reads the disk inode for @ip and fills
+ *  in all relevant fields in @ip.
+ */
+void
+vxfs_read_inode(struct inode *ip)
+{
+        struct super_block              *sbp = ip->i_sb;
+        struct vxfs_inode_info          *vip;
+        struct address_space_operations *aops;
+        ino_t                           ino = ip->i_ino;
+
+        if (!(vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_ilist)))
+                return;
+
+        vxfs_iinit(ip, vip);
+
+        if (VXFS_ISIMMED(vip))
+                aops = &vxfs_immed_aops;
+        else
+                aops = &vxfs_aops;
+
+        if (S_ISREG(ip->i_mode)) {
+                ip->i_fop = &vxfs_file_operations;
+                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;
+                        ip->i_mapping->a_ops = &vxfs_aops;
+                } else
+                        ip->i_op = &vxfs_immed_symlink_iops;
+        } else
+                init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev));
+
+        return;
+}
+
+/**
+ * vxfs_clear_inode - remove inode from main memory
+ * @ip:         inode to discard.
+ *
+ * Description:
+ *  vxfs_clear_inode() is called on the final iput and frees the private
+ *  inode area.
+ */
+void
+vxfs_clear_inode(struct inode *ip)
+{
+        kmem_cache_free(vxfs_inode_cachep, ip->u.generic_ip);
+}