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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/coda/pioctl.c
downloadlinux-linaro-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
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!
Diffstat (limited to 'fs/coda/pioctl.c')
-rw-r--r--fs/coda/pioctl.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c
new file mode 100644
index 000000000000..127714936c66
--- /dev/null
+++ b/fs/coda/pioctl.c
@@ -0,0 +1,95 @@
+/*
+ * Pioctl operations for Coda.
+ * Original version: (C) 1996 Peter Braam
+ * Rewritten for Linux 2.1: (C) 1997 Carnegie Mellon University
+ *
+ * Carnegie Mellon encourages users of this code to contribute improvements
+ * to the Coda project. Contact Peter Braam <coda@cs.cmu.edu>.
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/namei.h>
+#include <linux/module.h>
+#include <asm/uaccess.h>
+
+#include <linux/coda.h>
+#include <linux/coda_linux.h>
+#include <linux/coda_fs_i.h>
+#include <linux/coda_psdev.h>
+
+/* pioctl ops */
+static int coda_ioctl_permission(struct inode *inode, int mask,
+ struct nameidata *nd);
+static int coda_pioctl(struct inode * inode, struct file * filp,
+ unsigned int cmd, unsigned long user_data);
+
+/* exported from this file */
+struct inode_operations coda_ioctl_inode_operations =
+{
+ .permission = coda_ioctl_permission,
+ .setattr = coda_setattr,
+};
+
+struct file_operations coda_ioctl_operations = {
+ .owner = THIS_MODULE,
+ .ioctl = coda_pioctl,
+};
+
+/* the coda pioctl inode ops */
+static int coda_ioctl_permission(struct inode *inode, int mask,
+ struct nameidata *nd)
+{
+ return 0;
+}
+
+static int coda_pioctl(struct inode * inode, struct file * filp,
+ unsigned int cmd, unsigned long user_data)
+{
+ struct nameidata nd;
+ int error;
+ struct PioctlData data;
+ struct inode *target_inode = NULL;
+ struct coda_inode_info *cnp;
+
+ /* get the Pioctl data arguments from user space */
+ if (copy_from_user(&data, (void __user *)user_data, sizeof(data))) {
+ return -EINVAL;
+ }
+
+ /*
+ * Look up the pathname. Note that the pathname is in
+ * user memory, and namei takes care of this
+ */
+ if ( data.follow ) {
+ error = user_path_walk(data.path, &nd);
+ } else {
+ error = user_path_walk_link(data.path, &nd);
+ }
+
+ if ( error ) {
+ return error;
+ } else {
+ target_inode = nd.dentry->d_inode;
+ }
+
+ /* return if it is not a Coda inode */
+ if ( target_inode->i_sb != inode->i_sb ) {
+ path_release(&nd);
+ return -EINVAL;
+ }
+
+ /* now proceed to make the upcall */
+ cnp = ITOC(target_inode);
+
+ error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
+
+ path_release(&nd);
+ return error;
+}
+