/* * 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 "file.h" #include "inode.h" #include "journal.h" #include "ocfs2_fs.h" #include "ioctl.h" #include "resize.h" #include "refcounttree.h" #include <linux/ext2_fs.h> static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags) { int status; status = ocfs2_inode_lock(inode, NULL, 0); if (status < 0) { mlog_errno(status); return status; } ocfs2_get_inode_flags(OCFS2_I(inode)); *flags = OCFS2_I(inode)->ip_attr; ocfs2_inode_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); handle_t *handle = NULL; struct buffer_head *bh = NULL; unsigned oldflags; int status; mutex_lock(&inode->i_mutex); status = ocfs2_inode_lock(inode, &bh, 1); if (status < 0) { mlog_errno(status); goto bail; } status = -EACCES; if (!is_owner_or_cap(inode)) 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_inode_unlock(inode, 1); bail: mutex_unlock(&inode->i_mutex); brelse(bh); mlog_exit(status); return status; } long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct inode *inode = filp->f_path.dentry->d_inode; unsigned int flags; int new_clusters; int status; struct ocfs2_space_resv sr; struct ocfs2_new_group_input input; struct reflink_arguments args; const char *old_path, *new_path; bool preserve; 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; status = mnt_want_write(filp->f_path.mnt); if (status) return status; status = ocfs2_set_inode_attr(inode, flags, OCFS2_FL_MODIFIABLE); mnt_drop_write(filp->f_path.mnt); return status; case OCFS2_IOC_RESVSP: case OCFS2_IOC_RESVSP64: case OCFS2_IOC_UNRESVSP: case OCFS2_IOC_UNRESVSP64: if (copy_from_user(&sr, (int __user *) arg, sizeof(sr))) return -EFAULT; return ocfs2_change_file_space(filp, cmd, &sr); case OCFS2_IOC_GROUP_EXTEND: if (!capable(CAP_SYS_RESOURCE)) return -EPERM; if (get_user(new_clusters, (int __user *)arg)) return -EFAULT; return ocfs2_group_extend(inode, new_clusters); case OCFS2_IOC_GROUP_ADD: case OCFS2_IOC_GROUP_ADD64: if (!capable(CAP_SYS_RESOURCE)) return -EPERM; if (copy_from_user(&input, (int __user *) arg, sizeof(input))) return -EFAULT; return ocfs2_group_add(inode, &input); case OCFS2_IOC_REFLINK: if (copy_from_user(&args, (struct reflink_arguments *)arg, sizeof(args))) return -EFAULT; old_path = (const char *)(unsigned long)args.old_path; new_path = (const char *)(unsigned long)args.new_path; preserve = (args.preserve != 0); return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve); default: return -ENOTTY; } } #ifdef CONFIG_COMPAT long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg) { switch (cmd) { case OCFS2_IOC32_GETFLAGS: cmd = OCFS2_IOC_GETFLAGS; break; case OCFS2_IOC32_SETFLAGS: cmd = OCFS2_IOC_SETFLAGS; break; case OCFS2_IOC_RESVSP: case OCFS2_IOC_RESVSP64: case OCFS2_IOC_UNRESVSP: case OCFS2_IOC_UNRESVSP64: case OCFS2_IOC_GROUP_EXTEND: case OCFS2_IOC_GROUP_ADD: case OCFS2_IOC_GROUP_ADD64: case OCFS2_IOC_REFLINK: break; default: return -ENOIOCTLCMD; } return ocfs2_ioctl(file, cmd, arg); } #endif