diff options
Diffstat (limited to 'fs/hfsplus/ioctl.c')
| -rw-r--r-- | fs/hfsplus/ioctl.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/fs/hfsplus/ioctl.c b/fs/hfsplus/ioctl.c new file mode 100644 index 000000000000..e07aa096e07c --- /dev/null +++ b/fs/hfsplus/ioctl.c @@ -0,0 +1,188 @@ +/* + * 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/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 |= EXT2_FLAG_IMMUTABLE; /* EXT2_IMMUTABLE_FL */ + if (HFSPLUS_I(inode).rootflags & HFSPLUS_FLG_APPEND) + flags |= EXT2_FLAG_APPEND; /* EXT2_APPEND_FL */ + if (HFSPLUS_I(inode).userflags & HFSPLUS_FLG_NODUMP) + flags |= EXT2_FLAG_NODUMP; /* 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 & (EXT2_FLAG_IMMUTABLE|EXT2_FLAG_APPEND) || + 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 & ~(EXT2_FLAG_IMMUTABLE|EXT2_FLAG_APPEND| + EXT2_FLAG_NODUMP)) + return -EOPNOTSUPP; + + if (flags & EXT2_FLAG_IMMUTABLE) { /* 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 & EXT2_FLAG_APPEND) { /* 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 & EXT2_FLAG_NODUMP) /* 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; +} |