This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / fs / ocfs2 / ioctl.c

diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
new file mode 100644 (file)
index 0000000..69cfcca
--- /dev/null
+++ b/fs/ocfs2/ioctl.c
@@ -0,0 +1,136 @@
+/*
+ * linux/fs/ocfs2/ioctl.c
+ *
+ * Copyright (C) 2006 Herbert Poetzl
+ * adapted from Remy Card's ext2/ioctl.c
+ */
+
+#include <linux/fs.h>
+#include <linux/mount.h>
+
+#define MLOG_MASK_PREFIX ML_INODE
+#include <cluster/masklog.h>
+
+#include "ocfs2.h"
+#include "alloc.h"
+#include "dlmglue.h"
+#include "inode.h"
+#include "journal.h"
+
+#include "ocfs2_fs.h"
+#include "ioctl.h"
+
+#include <linux/ext2_fs.h>
+
+static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags)
+{
+       int status;
+
+       status = ocfs2_meta_lock(inode, NULL, 0);
+       if (status < 0) {
+               mlog_errno(status);
+               return status;
+       }
+       *flags = OCFS2_I(inode)->ip_attr;
+       ocfs2_meta_unlock(inode, 0);
+
+       mlog_exit(status);
+       return status;
+}
+
+int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
+                               unsigned mask)
+{
+       struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode);
+       struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+       handle_t *handle = NULL;
+       struct buffer_head *bh = NULL;
+       unsigned oldflags;
+       int status;
+
+       mutex_lock(&inode->i_mutex);
+
+       status = ocfs2_meta_lock(inode, &bh, 1);
+       if (status < 0) {
+               mlog_errno(status);
+               goto bail;
+       }
+
+       status = -EROFS;
+       if (IS_RDONLY(inode))
+               goto bail_unlock;
+
+       status = -EACCES;
+       if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+               goto bail_unlock;
+
+       if (!S_ISDIR(inode->i_mode))
+               flags &= ~OCFS2_DIRSYNC_FL;
+
+       handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
+       if (IS_ERR(handle)) {
+               status = PTR_ERR(handle);
+               mlog_errno(status);
+               goto bail_unlock;
+       }
+
+       oldflags = ocfs2_inode->ip_attr;
+       flags = flags & mask;
+       flags |= oldflags & ~mask;
+
+       /*
+        * The IMMUTABLE and APPEND_ONLY flags can only be changed by
+        * the relevant capability.
+        */
+       status = -EPERM;
+       if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) &
+               (OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) {
+               if (!capable(CAP_LINUX_IMMUTABLE))
+                       goto bail_unlock;
+       }
+
+       ocfs2_inode->ip_attr = flags;
+       ocfs2_set_inode_flags(inode);
+
+       status = ocfs2_mark_inode_dirty(handle, inode, bh);
+       if (status < 0)
+               mlog_errno(status);
+
+       ocfs2_commit_trans(osb, handle);
+bail_unlock:
+       ocfs2_meta_unlock(inode, 1);
+bail:
+       mutex_unlock(&inode->i_mutex);
+
+       if (bh)
+               brelse(bh);
+
+       mlog_exit(status);
+       return status;
+}
+
+int ocfs2_ioctl(struct inode * inode, struct file * filp,
+       unsigned int cmd, unsigned long arg)
+{
+       unsigned int flags;
+       int status;
+
+       switch (cmd) {
+       case OCFS2_IOC_GETFLAGS:
+               status = ocfs2_get_inode_attr(inode, &flags);
+               if (status < 0)
+                       return status;
+
+               flags &= OCFS2_FL_VISIBLE;
+               return put_user(flags, (int __user *) arg);
+       case OCFS2_IOC_SETFLAGS:
+               if (get_user(flags, (int __user *) arg))
+                       return -EFAULT;
+
+               return ocfs2_set_inode_attr(inode, flags,
+                       OCFS2_FL_MODIFIABLE);
+       default:
+               return -ENOTTY;
+       }
+}
+