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/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
new file mode 100644
index 0000000..94dc424
--- /dev/null
+++ b/fs/reiserfs/ioctl.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ */
+
+#include <linux/fs.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/time.h>
+#include <asm/uaccess.h>
+#include <linux/pagemap.h>
+#include <linux/smp_lock.h>
+
+static int reiserfs_unpack (struct inode * inode, struct file * filp);
+
+/*
+** reiserfs_ioctl - handler for ioctl for inode
+** supported commands:
+** 1) REISERFS_IOC_UNPACK - try to unpack tail from direct item into indirect
+** and prevent packing file (argument arg has to be non-zero)
+** 2) REISERFS_IOC_[GS]ETFLAGS, REISERFS_IOC_[GS]ETVERSION
+** 3) That's all for a while ...
+*/
+int reiserfs_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
+ unsigned long arg)
+{
+ unsigned int flags;
+
+ switch (cmd) {
+ case REISERFS_IOC_UNPACK:
+ if( S_ISREG( inode -> i_mode ) ) {
+ if (arg)
+ return reiserfs_unpack (inode, filp);
+ else
+ return 0;
+ } else
+ return -ENOTTY;
+ /* following two cases are taken from fs/ext2/ioctl.c by Remy
+ Card (card@masi.ibp.fr) */
+ case REISERFS_IOC_GETFLAGS:
+ flags = REISERFS_I(inode) -> i_attrs;
+ i_attrs_to_sd_attrs( inode, ( __u16 * ) &flags );
+ return put_user(flags, (int __user *) arg);
+ case REISERFS_IOC_SETFLAGS: {
+ if (IS_RDONLY(inode))
+ return -EROFS;
+
+ if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+ return -EPERM;
+
+ if (get_user(flags, (int __user *) arg))
+ return -EFAULT;
+
+ if ( ( ( flags ^ REISERFS_I(inode) -> i_attrs) & ( REISERFS_IMMUTABLE_FL | REISERFS_APPEND_FL)) &&
+ !capable( CAP_LINUX_IMMUTABLE ) )
+ return -EPERM;
+
+ if( ( flags & REISERFS_NOTAIL_FL ) &&
+ S_ISREG( inode -> i_mode ) ) {
+ int result;
+
+ result = reiserfs_unpack( inode, filp );
+ if( result )
+ return result;
+ }
+ sd_attrs_to_i_attrs( flags, inode );
+ REISERFS_I(inode) -> i_attrs = flags;
+ inode->i_ctime = CURRENT_TIME_SEC;
+ mark_inode_dirty(inode);
+ return 0;
+ }
+ case REISERFS_IOC_GETVERSION:
+ return put_user(inode->i_generation, (int __user *) arg);
+ case REISERFS_IOC_SETVERSION:
+ if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+ return -EPERM;
+ if (IS_RDONLY(inode))
+ return -EROFS;
+ if (get_user(inode->i_generation, (int __user *) arg))
+ return -EFAULT;
+ inode->i_ctime = CURRENT_TIME_SEC;
+ mark_inode_dirty(inode);
+ return 0;
+ default:
+ return -ENOTTY;
+ }
+}
+
+/*
+** reiserfs_unpack
+** Function try to convert tail from direct item into indirect.
+** It set up nopack attribute in the REISERFS_I(inode)->nopack
+*/
+static int reiserfs_unpack (struct inode * inode, struct file * filp)
+{
+ int retval = 0;
+ int index ;
+ struct page *page ;
+ struct address_space *mapping ;
+ unsigned long write_from ;
+ unsigned long blocksize = inode->i_sb->s_blocksize ;
+
+ if (inode->i_size == 0) {
+ REISERFS_I(inode)->i_flags |= i_nopack_mask;
+ return 0 ;
+ }
+ /* ioctl already done */
+ if (REISERFS_I(inode)->i_flags & i_nopack_mask) {
+ return 0 ;
+ }
+ reiserfs_write_lock(inode->i_sb);
+
+ /* we need to make sure nobody is changing the file size beneath
+ ** us
+ */
+ down(&inode->i_sem) ;
+
+ write_from = inode->i_size & (blocksize - 1) ;
+ /* if we are on a block boundary, we are already unpacked. */
+ if ( write_from == 0) {
+ REISERFS_I(inode)->i_flags |= i_nopack_mask;
+ goto out ;
+ }
+
+ /* we unpack by finding the page with the tail, and calling
+ ** reiserfs_prepare_write on that page. This will force a
+ ** reiserfs_get_block to unpack the tail for us.
+ */
+ index = inode->i_size >> PAGE_CACHE_SHIFT ;
+ mapping = inode->i_mapping ;
+ page = grab_cache_page(mapping, index) ;
+ retval = -ENOMEM;
+ if (!page) {
+ goto out ;
+ }
+ retval = mapping->a_ops->prepare_write(NULL, page, write_from, write_from) ;
+ if (retval)
+ goto out_unlock ;
+
+ /* conversion can change page contents, must flush */
+ flush_dcache_page(page) ;
+ retval = mapping->a_ops->commit_write(NULL, page, write_from, write_from) ;
+ REISERFS_I(inode)->i_flags |= i_nopack_mask;
+
+out_unlock:
+ unlock_page(page) ;
+ page_cache_release(page) ;
+
+out:
+ up(&inode->i_sem) ;
+ reiserfs_write_unlock(inode->i_sb);
+ return retval;
+}