/* * 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, 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; } }