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authorHerbert Poetzl <herbert@13thfloor.at>2006-02-22 14:14:58 -0600
committerDave Kleikamp <shaggy@austin.ibm.com>2006-02-22 14:14:58 -0600
commitd9e902668e815f9f33ba5056089684b0704eeac6 (patch)
treea2efed26b40b36f38e155955d661f776759a42dc /fs/jfs/ioctl.c
parent91dbb4deb30e817efc8d6bed89b1190a489ca776 (diff)
JFS: Add missing file from fa3241d24cf1182b0ffb6e4d412c3bc2a2ab7bf6
My mistake here. I failed to checkin fs/jfs/ioctl.c Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Diffstat (limited to 'fs/jfs/ioctl.c')
-rw-r--r--fs/jfs/ioctl.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/fs/jfs/ioctl.c b/fs/jfs/ioctl.c
new file mode 100644
index 00000000000..67b3774820e
--- /dev/null
+++ b/fs/jfs/ioctl.c
@@ -0,0 +1,107 @@
+/*
+ * linux/fs/jfs/ioctl.c
+ *
+ * Copyright (C) 2006 Herbert Poetzl
+ * adapted from Remy Card's ext2/ioctl.c
+ */
+
+#include <linux/fs.h>
+#include <linux/ext2_fs.h>
+#include <linux/ctype.h>
+#include <linux/capability.h>
+#include <linux/time.h>
+#include <asm/current.h>
+#include <asm/uaccess.h>
+
+#include "jfs_incore.h"
+#include "jfs_dinode.h"
+#include "jfs_inode.h"
+
+
+static struct {
+ long jfs_flag;
+ long ext2_flag;
+} jfs_map[] = {
+ {JFS_NOATIME_FL, EXT2_NOATIME_FL},
+ {JFS_DIRSYNC_FL, EXT2_DIRSYNC_FL},
+ {JFS_SYNC_FL, EXT2_SYNC_FL},
+ {JFS_SECRM_FL, EXT2_SECRM_FL},
+ {JFS_UNRM_FL, EXT2_UNRM_FL},
+ {JFS_APPEND_FL, EXT2_APPEND_FL},
+ {JFS_IMMUTABLE_FL, EXT2_IMMUTABLE_FL},
+ {0, 0},
+};
+
+static long jfs_map_ext2(unsigned long flags, int from)
+{
+ int index=0;
+ long mapped=0;
+
+ while (jfs_map[index].jfs_flag) {
+ if (from) {
+ if (jfs_map[index].ext2_flag & flags)
+ mapped |= jfs_map[index].jfs_flag;
+ } else {
+ if (jfs_map[index].jfs_flag & flags)
+ mapped |= jfs_map[index].ext2_flag;
+ }
+ index++;
+ }
+ return mapped;
+}
+
+
+int jfs_ioctl(struct inode * inode, struct file * filp, unsigned int cmd,
+ unsigned long arg)
+{
+ struct jfs_inode_info *jfs_inode = JFS_IP(inode);
+ unsigned int flags;
+
+ switch (cmd) {
+ case JFS_IOC_GETFLAGS:
+ flags = jfs_inode->mode2 & JFS_FL_USER_VISIBLE;
+ flags = jfs_map_ext2(flags, 0);
+ return put_user(flags, (int __user *) arg);
+ case JFS_IOC_SETFLAGS: {
+ unsigned int oldflags;
+
+ if (IS_RDONLY(inode))
+ return -EROFS;
+
+ if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+ return -EACCES;
+
+ if (get_user(flags, (int __user *) arg))
+ return -EFAULT;
+
+ flags = jfs_map_ext2(flags, 1);
+ if (!S_ISDIR(inode->i_mode))
+ flags &= ~JFS_DIRSYNC_FL;
+
+ oldflags = jfs_inode->mode2;
+
+ /*
+ * The IMMUTABLE and APPEND_ONLY flags can only be changed by
+ * the relevant capability.
+ */
+ if ((oldflags & JFS_IMMUTABLE_FL) ||
+ ((flags ^ oldflags) &
+ (JFS_APPEND_FL | JFS_IMMUTABLE_FL))) {
+ if (!capable(CAP_LINUX_IMMUTABLE))
+ return -EPERM;
+ }
+
+ flags = flags & JFS_FL_USER_MODIFIABLE;
+ flags |= oldflags & ~JFS_FL_USER_MODIFIABLE;
+ jfs_inode->mode2 = flags;
+
+ jfs_set_inode_flags(inode);
+ inode->i_ctime = CURRENT_TIME_SEC;
+ mark_inode_dirty(inode);
+ return 0;
+ }
+ default:
+ return -ENOTTY;
+ }
+}
+