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, 270 insertions, 0 deletions

diff --git a/fs/udf/file.c b/fs/udf/file.c
new file mode 100644
index 000000000000..2faa4172b9f7
--- /dev/null
+++ b/fs/udf/file.c
@@ -0,0 +1,270 @@
+/*
+ * file.c
+ *
+ * PURPOSE
+ *  File handling routines for the OSTA-UDF(tm) filesystem.
+ *
+ * CONTACTS
+ *  E-mail regarding any portion of the Linux UDF file system should be
+ *  directed to the development team mailing list (run by majordomo):
+ *    linux_udf@hpesjro.fc.hp.com
+ *
+ * COPYRIGHT
+ *  This file is distributed under the terms of the GNU General Public
+ *  License (GPL). Copies of the GPL can be obtained from:
+ *    ftp://prep.ai.mit.edu/pub/gnu/GPL
+ *  Each contributing author retains all rights to their own work.
+ *
+ *  (C) 1998-1999 Dave Boynton
+ *  (C) 1998-2004 Ben Fennema
+ *  (C) 1999-2000 Stelias Computing Inc
+ *
+ * HISTORY
+ *
+ *  10/02/98 dgb  Attempt to integrate into udf.o
+ *  10/07/98      Switched to using generic_readpage, etc., like isofs
+ *                And it works!
+ *  12/06/98 blf  Added udf_file_read. uses generic_file_read for all cases but
+ *                ICBTAG_FLAG_AD_IN_ICB.
+ *  04/06/99      64 bit file handling on 32 bit systems taken from ext2 file.c
+ *  05/12/99      Preliminary file write support
+ */
+
+#include "udfdecl.h"
+#include <linux/fs.h>
+#include <linux/udf_fs.h>
+#include <asm/uaccess.h>
+#include <linux/kernel.h>
+#include <linux/string.h> /* memset */
+#include <linux/errno.h>
+#include <linux/smp_lock.h>
+#include <linux/pagemap.h>
+#include <linux/buffer_head.h>
+
+#include "udf_i.h"
+#include "udf_sb.h"
+
+static int udf_adinicb_readpage(struct file *file, struct page * page)
+{
+        struct inode *inode = page->mapping->host;
+        char *kaddr;
+
+        if (!PageLocked(page))
+                PAGE_BUG(page);
+
+        kaddr = kmap(page);
+        memset(kaddr, 0, PAGE_CACHE_SIZE);
+        memcpy(kaddr, UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), inode->i_size);
+        flush_dcache_page(page);
+        SetPageUptodate(page);
+        kunmap(page);
+        unlock_page(page);
+        return 0;
+}
+
+static int udf_adinicb_writepage(struct page *page, struct writeback_control *wbc)
+{
+        struct inode *inode = page->mapping->host;
+        char *kaddr;
+
+        if (!PageLocked(page))
+                PAGE_BUG(page);
+
+        kaddr = kmap(page);
+        memcpy(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), kaddr, inode->i_size);
+        mark_inode_dirty(inode);
+        SetPageUptodate(page);
+        kunmap(page);
+        unlock_page(page);
+        return 0;
+}
+
+static int udf_adinicb_prepare_write(struct file *file, struct page *page, unsigned offset, unsigned to)
+{
+        kmap(page);
+        return 0;
+}
+
+static int udf_adinicb_commit_write(struct file *file, struct page *page, unsigned offset, unsigned to)
+{
+        struct inode *inode = page->mapping->host;
+        char *kaddr = page_address(page);
+
+        memcpy(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode) + offset,
+                kaddr + offset, to - offset);
+        mark_inode_dirty(inode);
+        SetPageUptodate(page);
+        kunmap(page);
+        /* only one page here */
+        if (to > inode->i_size)
+                inode->i_size = to;
+        return 0;
+}
+
+struct address_space_operations udf_adinicb_aops = {
+        .readpage               = udf_adinicb_readpage,
+        .writepage              = udf_adinicb_writepage,
+        .sync_page              = block_sync_page,
+        .prepare_write          = udf_adinicb_prepare_write,
+        .commit_write           = udf_adinicb_commit_write,
+};
+
+static ssize_t udf_file_write(struct file * file, const char __user * buf,
+        size_t count, loff_t *ppos)
+{
+        ssize_t retval;
+        struct inode *inode = file->f_dentry->d_inode;
+        int err, pos;
+
+        if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
+        {
+                if (file->f_flags & O_APPEND)
+                        pos = inode->i_size;
+                else
+                        pos = *ppos;
+
+                if (inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) +
+                        pos + count))
+                {
+                        udf_expand_file_adinicb(inode, pos + count, &err);
+                        if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
+                        {
+                                udf_debug("udf_expand_adinicb: err=%d\n", err);
+                                return err;
+                        }
+                }
+                else
+                {
+                        if (pos + count > inode->i_size)
+                                UDF_I_LENALLOC(inode) = pos + count;
+                        else
+                                UDF_I_LENALLOC(inode) = inode->i_size;
+                }
+        }
+
+        retval = generic_file_write(file, buf, count, ppos);
+
+        if (retval > 0)
+                mark_inode_dirty(inode);
+        return retval;
+}
+
+/*
+ * udf_ioctl
+ *
+ * PURPOSE
+ *      Issue an ioctl.
+ *
+ * DESCRIPTION
+ *      Optional - sys_ioctl() will return -ENOTTY if this routine is not
+ *      available, and the ioctl cannot be handled without filesystem help.
+ *
+ *      sys_ioctl() handles these ioctls that apply only to regular files:
+ *              FIBMAP [requires udf_block_map()], FIGETBSZ, FIONREAD
+ *      These ioctls are also handled by sys_ioctl():
+ *              FIOCLEX, FIONCLEX, FIONBIO, FIOASYNC
+ *      All other ioctls are passed to the filesystem.
+ *
+ *      Refer to sys_ioctl() in fs/ioctl.c
+ *      sys_ioctl() -> .
+ *
+ * PRE-CONDITIONS
+ *      inode                   Pointer to inode that ioctl was issued on.
+ *      filp                    Pointer to file that ioctl was issued on.
+ *      cmd                     The ioctl command.
+ *      arg                     The ioctl argument [can be interpreted as a
+ *                              user-space pointer if desired].
+ *
+ * POST-CONDITIONS
+ *      <return>                Success (>=0) or an error code (<=0) that
+ *                              sys_ioctl() will return.
+ *
+ * HISTORY
+ *      July 1, 1997 - Andrew E. Mileski
+ *      Written, tested, and released.
+ */
+int udf_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+        unsigned long arg)
+{
+        int result = -EINVAL;
+
+        if ( permission(inode, MAY_READ, NULL) != 0 )
+        {
+                udf_debug("no permission to access inode %lu\n",
+                                                inode->i_ino);
+                return -EPERM;
+        }
+
+        if ( !arg )
+        {
+                udf_debug("invalid argument to udf_ioctl\n");
+                return -EINVAL;
+        }
+
+        switch (cmd)
+        {
+                case UDF_GETVOLIDENT:
+                        return copy_to_user((char __user *)arg,
+                                UDF_SB_VOLIDENT(inode->i_sb), 32) ? -EFAULT : 0;
+                case UDF_RELOCATE_BLOCKS:
+                {
+                        long old, new;
+
+                        if (!capable(CAP_SYS_ADMIN)) return -EACCES;
+                        if (get_user(old, (long __user *)arg)) return -EFAULT;
+                        if ((result = udf_relocate_blocks(inode->i_sb,
+                                        old, &new)) == 0)
+                                result = put_user(new, (long __user *)arg);
+
+                        return result;
+                }
+                case UDF_GETEASIZE:
+                        result = put_user(UDF_I_LENEATTR(inode), (int __user *)arg);
+                        break;
+
+                case UDF_GETEABLOCK:
+                        result = copy_to_user((char __user *)arg, UDF_I_DATA(inode),
+                                UDF_I_LENEATTR(inode)) ? -EFAULT : 0;
+                        break;
+        }
+
+        return result;
+}
+
+/*
+ * udf_release_file
+ *
+ * PURPOSE
+ *  Called when all references to the file are closed
+ *
+ * DESCRIPTION
+ *  Discard prealloced blocks
+ *
+ * HISTORY
+ *
+ */
+static int udf_release_file(struct inode * inode, struct file * filp)
+{
+        if (filp->f_mode & FMODE_WRITE)
+        {
+                lock_kernel();
+                udf_discard_prealloc(inode);
+                unlock_kernel();
+        }
+        return 0;
+}
+
+struct file_operations udf_file_operations = {
+        .read                   = generic_file_read,
+        .ioctl                  = udf_ioctl,
+        .open                   = generic_file_open,
+        .mmap                   = generic_file_mmap,
+        .write                  = udf_file_write,
+        .release                = udf_release_file,
+        .fsync                  = udf_fsync_file,
+        .sendfile               = generic_file_sendfile,
+};
+
+struct inode_operations udf_file_inode_operations = {
+        .truncate               = udf_truncate,
+};