Linux-2.6.12-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!
diff --git a/fs/udf/file.c b/fs/udf/file.c
new file mode 100644
index 0000000..2faa417
--- /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,
+};