diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/hfsplus/ioctl.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/hfsplus/ioctl.c | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/fs/hfsplus/ioctl.c b/ANDROID_3.4.5/fs/hfsplus/ioctl.c new file mode 100644 index 00000000..09addc86 --- /dev/null +++ b/ANDROID_3.4.5/fs/hfsplus/ioctl.c @@ -0,0 +1,260 @@ +/* + * 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/mount.h> +#include <linux/sched.h> +#include <linux/xattr.h> +#include <asm/uaccess.h> +#include "hfsplus_fs.h" + +/* + * "Blessing" an HFS+ filesystem writes metadata to the superblock informing + * the platform firmware which file to boot from + */ +static int hfsplus_ioctl_bless(struct file *file, int __user *user_flags) +{ + struct dentry *dentry = file->f_path.dentry; + struct inode *inode = dentry->d_inode; + struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); + struct hfsplus_vh *vh = sbi->s_vhdr; + struct hfsplus_vh *bvh = sbi->s_backup_vhdr; + u32 cnid = (unsigned long)dentry->d_fsdata; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + mutex_lock(&sbi->vh_mutex); + + /* Directory containing the bootable system */ + vh->finder_info[0] = bvh->finder_info[0] = + cpu_to_be32(parent_ino(dentry)); + + /* + * Bootloader. Just using the inode here breaks in the case of + * hard links - the firmware wants the ID of the hard link file, + * but the inode points at the indirect inode + */ + vh->finder_info[1] = bvh->finder_info[1] = cpu_to_be32(cnid); + + /* Per spec, the OS X system folder - same as finder_info[0] here */ + vh->finder_info[5] = bvh->finder_info[5] = + cpu_to_be32(parent_ino(dentry)); + + mutex_unlock(&sbi->vh_mutex); + return 0; +} + +static int hfsplus_ioctl_getflags(struct file *file, int __user *user_flags) +{ + struct inode *inode = file->f_path.dentry->d_inode; + struct hfsplus_inode_info *hip = HFSPLUS_I(inode); + unsigned int flags = 0; + + if (inode->i_flags & S_IMMUTABLE) + flags |= FS_IMMUTABLE_FL; + if (inode->i_flags & S_APPEND) + flags |= FS_APPEND_FL; + if (hip->userflags & HFSPLUS_FLG_NODUMP) + flags |= FS_NODUMP_FL; + + return put_user(flags, user_flags); +} + +static int hfsplus_ioctl_setflags(struct file *file, int __user *user_flags) +{ + struct inode *inode = file->f_path.dentry->d_inode; + struct hfsplus_inode_info *hip = HFSPLUS_I(inode); + unsigned int flags; + int err = 0; + + err = mnt_want_write_file(file); + if (err) + goto out; + + if (!inode_owner_or_capable(inode)) { + err = -EACCES; + goto out_drop_write; + } + + if (get_user(flags, user_flags)) { + err = -EFAULT; + goto out_drop_write; + } + + mutex_lock(&inode->i_mutex); + + if ((flags & (FS_IMMUTABLE_FL|FS_APPEND_FL)) || + inode->i_flags & (S_IMMUTABLE|S_APPEND)) { + if (!capable(CAP_LINUX_IMMUTABLE)) { + err = -EPERM; + goto out_unlock_inode; + } + } + + /* don't silently ignore unsupported ext2 flags */ + if (flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL)) { + err = -EOPNOTSUPP; + goto out_unlock_inode; + } + + if (flags & FS_IMMUTABLE_FL) + inode->i_flags |= S_IMMUTABLE; + else + inode->i_flags &= ~S_IMMUTABLE; + + if (flags & FS_APPEND_FL) + inode->i_flags |= S_APPEND; + else + inode->i_flags &= ~S_APPEND; + + if (flags & FS_NODUMP_FL) + hip->userflags |= HFSPLUS_FLG_NODUMP; + else + hip->userflags &= ~HFSPLUS_FLG_NODUMP; + + inode->i_ctime = CURRENT_TIME_SEC; + mark_inode_dirty(inode); + +out_unlock_inode: + mutex_unlock(&inode->i_mutex); +out_drop_write: + mnt_drop_write_file(file); +out: + return err; +} + +long hfsplus_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + void __user *argp = (void __user *)arg; + + switch (cmd) { + case HFSPLUS_IOC_EXT2_GETFLAGS: + return hfsplus_ioctl_getflags(file, argp); + case HFSPLUS_IOC_EXT2_SETFLAGS: + return hfsplus_ioctl_setflags(file, argp); + case HFSPLUS_IOC_BLESS: + return hfsplus_ioctl_bless(file, argp); + 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)); + hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY); + } +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 = -EOPNOTSUPP; +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; +} |