patch-2.1.70 linux/fs/coda/pioctl.c

• Lines: 155
• Date: Tue Dec 2 14:24:04 1997
• Orig file: v2.1.69/linux/fs/coda/pioctl.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.69/linux/fs/coda/pioctl.c linux/fs/coda/pioctl.c
@@ -0,0 +1,154 @@
+/*
+ * 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/sched.h>
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/locks.h>
+#include <asm/segment.h>
+#include <linux/string.h>
+#include <asm/uaccess.h>
+
+#include <linux/coda_namecache.h>
+#include <linux/coda.h>
+#include <linux/coda_linux.h>
+#include <linux/coda_cnode.h>
+#include <linux/coda_psdev.h>
+
+/* pioctl ops */
+static int coda_ioctl_permission(struct inode *inode, int mask);
+static int coda_ioctl_open(struct inode *i, struct file *f);
+static int coda_ioctl_release(struct inode *i, struct file *f);
+static int coda_pioctl(struct inode * inode, struct file * filp, 
+                       unsigned int cmd, unsigned long arg);
+
+/* exported from this file */
+struct inode_operations coda_ioctl_inode_operations =
+{
+	&coda_ioctl_operations,
+	NULL,	                /* create */
+	NULL,	                /* lookup */
+	NULL,	                /* link */
+	NULL,	                /* unlink */
+	NULL,	                /* symlink */
+	NULL,	                /* mkdir */
+	NULL,	                /* rmdir */
+	NULL,		        /* mknod */
+	NULL,		        /* rename */
+	NULL,	                /* readlink */
+	NULL,	                /* follow_link */
+	NULL,	                /* readpage */
+	NULL,		        /* writepage */
+	NULL,		        /* bmap */
+	NULL,	                /* truncate */
+	coda_ioctl_permission,  /* permission */
+	NULL,                   /* smap */
+	NULL,                   /* update page */
+        NULL                    /* revalidate */
+};
+
+struct file_operations coda_ioctl_operations = {
+	NULL,		        /* lseek - default should work for coda */
+	NULL,                   /* read */
+	NULL,                   /* write */
+	NULL,          		/* readdir */
+	NULL,			/* select - default */
+	coda_pioctl,	        /* ioctl */
+	NULL,                   /* mmap */
+	coda_ioctl_open,        /* open */
+	coda_ioctl_release,     /* release */
+	NULL,		        /* fsync */
+};
+
+/* the coda pioctl inode ops */
+static int coda_ioctl_permission(struct inode *inode, int mask)
+{
+        ENTRY;
+
+        return 0;
+}
+
+/* The pioctl file ops*/
+int coda_ioctl_open(struct inode *i, struct file *f)
+{
+
+        ENTRY;
+
+        CDEBUG(D_PIOCTL, "File inode number: %ld\n", 
+	       f->f_dentry->d_inode->i_ino);
+
+	EXIT;
+        return 0;
+}
+
+int coda_ioctl_release(struct inode *i, struct file *f) 
+{
+        return 0;
+}
+
+
+static int coda_pioctl(struct inode * inode, struct file * filp, 
+		       unsigned int cmd, unsigned long user_data)
+{
+        struct dentry *target_de;
+        int error;
+	struct PioctlData data;
+        struct inode *target_inode = NULL;
+        struct cnode *cnp;
+
+        ENTRY;
+        /* get the Pioctl data arguments from user space */
+        if (copy_from_user(&data, (int *)user_data, sizeof(data))) {
+	    return -EINVAL;
+	}
+       
+        /* 
+         * Look up the pathname. Note that the pathname is in 
+         * user memory, and namei takes care of this
+         */
+	CDEBUG(D_PIOCTL, "namei, data.follow = %d\n", data.follow);
+        if ( data.follow ) {
+                target_de = namei(data.path);
+	} else {
+	        target_de = lnamei(data.path);
+	}
+
+	if (!target_de) {
+                CDEBUG(D_PIOCTL, "error: lookup fails.\n");
+		return -EINVAL;
+        } else {
+	        target_inode = target_de->d_inode;
+	}
+	
+	CDEBUG(D_PIOCTL, "target ino: 0x%ld, dev: 0x%d\n",
+	       target_inode->i_ino, target_inode->i_dev);
+
+	/* return if it is not a Coda inode */
+	if ( target_inode->i_sb != inode->i_sb ) {
+  	        if ( target_de )
+		        dput(target_de);
+	        return  -EINVAL;
+	}
+
+	/* now proceed to make the upcall */
+        cnp = ITOC(target_inode);
+        CHECK_CNODE(cnp);
+
+	error = venus_pioctl(inode->i_sb, &(cnp->c_fid), cmd, &data);
+
+        CDEBUG(D_PIOCTL, "ioctl on inode %ld\n", target_inode->i_ino);
+
+        if ( target_de ) 
+	        dput(target_de);
+        return error;
+}
+