ocfs2: add ext2 attributes
Support immutable, and other attributes.
Some renaming and other minor fixes done by myself.
Signed-off-by: Herbert Poetzl <herbert@13thfloor.at>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
new file mode 100644
index 0000000..68f4806
--- /dev/null
+++ b/fs/ocfs2/ioctl.c
@@ -0,0 +1,134 @@
+/*
+ * 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 <linux/ext2_fs.h>
+
+static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags)
+{
+ int status;
+
+ status = ocfs2_meta_lock(inode, NULL, 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;
+}
+
+static 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);
+ struct ocfs2_journal_handle *handle = NULL;
+ struct buffer_head *bh = NULL;
+ unsigned oldflags;
+ int status;
+
+ mutex_lock(&inode->i_mutex);
+
+ status = ocfs2_meta_lock(inode, NULL, &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, NULL, 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(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;
+ }
+}
+