/* * linux/fs/hfsplus/ioctl.c * * Copyright (C) 2003 * Ethan Benson <erbenson@alaska.net> * partially derived from linux/fs/ext2/ioctl.c * Copyright (C) 1993, 1994, 1995 * Remy Card (card@masi.ibp.fr) * Laboratoire MASI - Institut Blaise Pascal * Universite Pierre et Marie Curie (Paris VI) * * hfsplus ioctls */ #include <linux/capability.h> #include <linux/fs.h> #include <linux/sched.h> #include <linux/xattr.h> #include <asm/uaccess.h> #include "hfsplus_fs.h" int hfsplus_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { unsigned int flags; switch (cmd) { case HFSPLUS_IOC_EXT2_GETFLAGS: flags = 0; if (HFSPLUS_I(inode).rootflags & HFSPLUS_FLG_IMMUTABLE) flags |= FS_IMMUTABLE_FL; /* EXT2_IMMUTABLE_FL */ if (HFSPLUS_I(inode).rootflags & HFSPLUS_FLG_APPEND) flags |= FS_APPEND_FL; /* EXT2_APPEND_FL */ if (HFSPLUS_I(inode).userflags & HFSPLUS_FLG_NODUMP) flags |= FS_NODUMP_FL; /* EXT2_NODUMP_FL */ return put_user(flags, (int __user *)arg); case HFSPLUS_IOC_EXT2_SETFLAGS: { 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; if (flags & (FS_IMMUTABLE_FL|FS_APPEND_FL) || HFSPLUS_I(inode).rootflags & (HFSPLUS_FLG_IMMUTABLE|HFSPLUS_FLG_APPEND)) { if (!capable(CAP_LINUX_IMMUTABLE)) return -EPERM; } /* don't silently ignore unsupported ext2 flags */ if (flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL)) return -EOPNOTSUPP; if (flags & FS_IMMUTABLE_FL) { /* EXT2_IMMUTABLE_FL */ inode->i_flags |= S_IMMUTABLE; HFSPLUS_I(inode).rootflags |= HFSPLUS_FLG_IMMUTABLE; } else { inode->i_flags &= ~S_IMMUTABLE; HFSPLUS_I(inode).rootflags &= ~HFSPLUS_FLG_IMMUTABLE; } if (flags & FS_APPEND_FL) { /* EXT2_APPEND_FL */ inode->i_flags |= S_APPEND; HFSPLUS_I(inode).rootflags |= HFSPLUS_FLG_APPEND; } else { inode->i_flags &= ~S_APPEND; HFSPLUS_I(inode).rootflags &= ~HFSPLUS_FLG_APPEND; } if (flags & FS_NODUMP_FL) /* EXT2_NODUMP_FL */ HFSPLUS_I(inode).userflags |= HFSPLUS_FLG_NODUMP; else HFSPLUS_I(inode).userflags &= ~HFSPLUS_FLG_NODUMP; inode->i_ctime = CURRENT_TIME_SEC; mark_inode_dirty(inode); return 0; } default: return -ENOTTY; } } int hfsplus_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags) { struct inode *inode = dentry->d_inode; struct hfs_find_data fd; hfsplus_cat_entry entry; struct hfsplus_cat_file *file; int res; if (!S_ISREG(inode->i_mode) || HFSPLUS_IS_RSRC(inode)) return -EOPNOTSUPP; res = hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd); if (res) return res; res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); if (res) goto out; hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, sizeof(struct hfsplus_cat_file)); file = &entry.file; if (!strcmp(name, "hfs.type")) { if (size == 4) memcpy(&file->user_info.fdType, value, 4); else res = -ERANGE; } else if (!strcmp(name, "hfs.creator")) { if (size == 4) memcpy(&file->user_info.fdCreator, value, 4); else res = -ERANGE; } else res = -EOPNOTSUPP; if (!res) hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, sizeof(struct hfsplus_cat_file)); out: hfs_find_exit(&fd); return res; } ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name, void *value, size_t size) { struct inode *inode = dentry->d_inode; struct hfs_find_data fd; hfsplus_cat_entry entry; struct hfsplus_cat_file *file; ssize_t res = 0; if (!S_ISREG(inode->i_mode) || HFSPLUS_IS_RSRC(inode)) return -EOPNOTSUPP; if (size) { res = hfs_find_init(HFSPLUS_SB(inode->i_sb).cat_tree, &fd); if (res) return res; res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); if (res) goto out; hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, sizeof(struct hfsplus_cat_file)); } file = &entry.file; if (!strcmp(name, "hfs.type")) { if (size >= 4) { memcpy(value, &file->user_info.fdType, 4); res = 4; } else res = size ? -ERANGE : 4; } else if (!strcmp(name, "hfs.creator")) { if (size >= 4) { memcpy(value, &file->user_info.fdCreator, 4); res = 4; } else res = size ? -ERANGE : 4; } else res = -ENODATA; out: if (size) hfs_find_exit(&fd); return res; } #define HFSPLUS_ATTRLIST_SIZE (sizeof("hfs.creator")+sizeof("hfs.type")) ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size) { struct inode *inode = dentry->d_inode; if (!S_ISREG(inode->i_mode) || HFSPLUS_IS_RSRC(inode)) return -EOPNOTSUPP; if (!buffer || !size) return HFSPLUS_ATTRLIST_SIZE; if (size < HFSPLUS_ATTRLIST_SIZE) return -ERANGE; strcpy(buffer, "hfs.type"); strcpy(buffer + sizeof("hfs.type"), "hfs.creator"); return HFSPLUS_ATTRLIST_SIZE; }