710 lines
18 KiB
C
710 lines
18 KiB
C
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/*
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* linux/fs/hfsplus/xattr.c
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*
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* Vyacheslav Dubeyko <slava@dubeyko.com>
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*
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* Logic of processing extended attributes
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*/
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#include "hfsplus_fs.h"
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#include "xattr.h"
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const struct xattr_handler *hfsplus_xattr_handlers[] = {
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&hfsplus_xattr_osx_handler,
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&hfsplus_xattr_user_handler,
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&hfsplus_xattr_trusted_handler,
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&hfsplus_xattr_security_handler,
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NULL
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};
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static int strcmp_xattr_finder_info(const char *name)
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{
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if (name) {
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return strncmp(name, HFSPLUS_XATTR_FINDER_INFO_NAME,
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sizeof(HFSPLUS_XATTR_FINDER_INFO_NAME));
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}
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return -1;
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}
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static int strcmp_xattr_acl(const char *name)
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{
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if (name) {
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return strncmp(name, HFSPLUS_XATTR_ACL_NAME,
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sizeof(HFSPLUS_XATTR_ACL_NAME));
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}
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return -1;
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}
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static inline int is_known_namespace(const char *name)
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{
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if (strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) &&
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strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
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strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) &&
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strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN))
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return false;
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return true;
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}
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static int can_set_xattr(struct inode *inode, const char *name,
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const void *value, size_t value_len)
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{
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if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
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return -EOPNOTSUPP; /* TODO: implement ACL support */
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if (!strncmp(name, XATTR_MAC_OSX_PREFIX, XATTR_MAC_OSX_PREFIX_LEN)) {
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/*
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* This makes sure that we aren't trying to set an
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* attribute in a different namespace by prefixing it
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* with "osx."
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*/
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if (is_known_namespace(name + XATTR_MAC_OSX_PREFIX_LEN))
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return -EOPNOTSUPP;
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return 0;
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}
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/*
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* Don't allow setting an attribute in an unknown namespace.
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*/
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if (strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) &&
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strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) &&
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strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
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return -EOPNOTSUPP;
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return 0;
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}
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int __hfsplus_setxattr(struct inode *inode, const char *name,
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const void *value, size_t size, int flags)
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{
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int err = 0;
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struct hfs_find_data cat_fd;
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hfsplus_cat_entry entry;
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u16 cat_entry_flags, cat_entry_type;
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u16 folder_finderinfo_len = sizeof(struct DInfo) +
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sizeof(struct DXInfo);
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u16 file_finderinfo_len = sizeof(struct FInfo) +
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sizeof(struct FXInfo);
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if ((!S_ISREG(inode->i_mode) &&
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!S_ISDIR(inode->i_mode)) ||
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HFSPLUS_IS_RSRC(inode))
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return -EOPNOTSUPP;
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err = can_set_xattr(inode, name, value, size);
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if (err)
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return err;
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if (strncmp(name, XATTR_MAC_OSX_PREFIX,
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XATTR_MAC_OSX_PREFIX_LEN) == 0)
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name += XATTR_MAC_OSX_PREFIX_LEN;
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if (value == NULL) {
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value = "";
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size = 0;
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}
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err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &cat_fd);
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if (err) {
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printk(KERN_ERR "hfs: can't init xattr find struct\n");
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return err;
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}
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err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &cat_fd);
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if (err) {
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printk(KERN_ERR "hfs: catalog searching failed\n");
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goto end_setxattr;
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}
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if (!strcmp_xattr_finder_info(name)) {
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if (flags & XATTR_CREATE) {
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printk(KERN_ERR "hfs: xattr exists yet\n");
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err = -EOPNOTSUPP;
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goto end_setxattr;
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}
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hfs_bnode_read(cat_fd.bnode, &entry, cat_fd.entryoffset,
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sizeof(hfsplus_cat_entry));
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if (be16_to_cpu(entry.type) == HFSPLUS_FOLDER) {
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if (size == folder_finderinfo_len) {
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memcpy(&entry.folder.user_info, value,
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folder_finderinfo_len);
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hfs_bnode_write(cat_fd.bnode, &entry,
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cat_fd.entryoffset,
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sizeof(struct hfsplus_cat_folder));
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hfsplus_mark_inode_dirty(inode,
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HFSPLUS_I_CAT_DIRTY);
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} else {
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err = -ERANGE;
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goto end_setxattr;
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}
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} else if (be16_to_cpu(entry.type) == HFSPLUS_FILE) {
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if (size == file_finderinfo_len) {
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memcpy(&entry.file.user_info, value,
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file_finderinfo_len);
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hfs_bnode_write(cat_fd.bnode, &entry,
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cat_fd.entryoffset,
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sizeof(struct hfsplus_cat_file));
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hfsplus_mark_inode_dirty(inode,
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HFSPLUS_I_CAT_DIRTY);
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} else {
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err = -ERANGE;
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goto end_setxattr;
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}
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} else {
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err = -EOPNOTSUPP;
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goto end_setxattr;
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}
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goto end_setxattr;
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}
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if (!HFSPLUS_SB(inode->i_sb)->attr_tree) {
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err = -EOPNOTSUPP;
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goto end_setxattr;
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}
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if (hfsplus_attr_exists(inode, name)) {
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if (flags & XATTR_CREATE) {
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printk(KERN_ERR "hfs: xattr exists yet\n");
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err = -EOPNOTSUPP;
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goto end_setxattr;
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}
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err = hfsplus_delete_attr(inode, name);
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if (err)
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goto end_setxattr;
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err = hfsplus_create_attr(inode, name, value, size);
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if (err)
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goto end_setxattr;
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} else {
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if (flags & XATTR_REPLACE) {
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printk(KERN_ERR "hfs: cannot replace xattr\n");
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err = -EOPNOTSUPP;
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goto end_setxattr;
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}
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err = hfsplus_create_attr(inode, name, value, size);
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if (err)
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goto end_setxattr;
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}
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cat_entry_type = hfs_bnode_read_u16(cat_fd.bnode, cat_fd.entryoffset);
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if (cat_entry_type == HFSPLUS_FOLDER) {
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cat_entry_flags = hfs_bnode_read_u16(cat_fd.bnode,
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cat_fd.entryoffset +
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offsetof(struct hfsplus_cat_folder, flags));
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cat_entry_flags |= HFSPLUS_XATTR_EXISTS;
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if (!strcmp_xattr_acl(name))
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cat_entry_flags |= HFSPLUS_ACL_EXISTS;
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hfs_bnode_write_u16(cat_fd.bnode, cat_fd.entryoffset +
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offsetof(struct hfsplus_cat_folder, flags),
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cat_entry_flags);
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hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
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} else if (cat_entry_type == HFSPLUS_FILE) {
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cat_entry_flags = hfs_bnode_read_u16(cat_fd.bnode,
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cat_fd.entryoffset +
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offsetof(struct hfsplus_cat_file, flags));
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cat_entry_flags |= HFSPLUS_XATTR_EXISTS;
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if (!strcmp_xattr_acl(name))
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cat_entry_flags |= HFSPLUS_ACL_EXISTS;
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hfs_bnode_write_u16(cat_fd.bnode, cat_fd.entryoffset +
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offsetof(struct hfsplus_cat_file, flags),
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cat_entry_flags);
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hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
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} else {
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printk(KERN_ERR "hfs: invalid catalog entry type\n");
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err = -EIO;
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goto end_setxattr;
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}
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end_setxattr:
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hfs_find_exit(&cat_fd);
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return err;
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}
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static inline int is_osx_xattr(const char *xattr_name)
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{
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return !is_known_namespace(xattr_name);
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}
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static int name_len(const char *xattr_name, int xattr_name_len)
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{
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int len = xattr_name_len + 1;
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if (is_osx_xattr(xattr_name))
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len += XATTR_MAC_OSX_PREFIX_LEN;
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return len;
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}
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static int copy_name(char *buffer, const char *xattr_name, int name_len)
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{
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int len = name_len;
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int offset = 0;
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if (is_osx_xattr(xattr_name)) {
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strncpy(buffer, XATTR_MAC_OSX_PREFIX, XATTR_MAC_OSX_PREFIX_LEN);
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offset += XATTR_MAC_OSX_PREFIX_LEN;
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len += XATTR_MAC_OSX_PREFIX_LEN;
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}
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strncpy(buffer + offset, xattr_name, name_len);
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memset(buffer + offset + name_len, 0, 1);
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len += 1;
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return len;
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}
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static ssize_t hfsplus_getxattr_finder_info(struct dentry *dentry,
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void *value, size_t size)
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{
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ssize_t res = 0;
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struct inode *inode = dentry->d_inode;
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struct hfs_find_data fd;
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u16 entry_type;
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u16 folder_rec_len = sizeof(struct DInfo) + sizeof(struct DXInfo);
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u16 file_rec_len = sizeof(struct FInfo) + sizeof(struct FXInfo);
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u16 record_len = max(folder_rec_len, file_rec_len);
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u8 folder_finder_info[sizeof(struct DInfo) + sizeof(struct DXInfo)];
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u8 file_finder_info[sizeof(struct FInfo) + sizeof(struct FXInfo)];
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if (size >= record_len) {
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res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
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if (res) {
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printk(KERN_ERR "hfs: can't init xattr find struct\n");
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return res;
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}
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res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
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if (res)
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goto end_getxattr_finder_info;
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entry_type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
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if (entry_type == HFSPLUS_FOLDER) {
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hfs_bnode_read(fd.bnode, folder_finder_info,
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fd.entryoffset +
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offsetof(struct hfsplus_cat_folder, user_info),
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folder_rec_len);
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memcpy(value, folder_finder_info, folder_rec_len);
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res = folder_rec_len;
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} else if (entry_type == HFSPLUS_FILE) {
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hfs_bnode_read(fd.bnode, file_finder_info,
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fd.entryoffset +
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offsetof(struct hfsplus_cat_file, user_info),
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file_rec_len);
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memcpy(value, file_finder_info, file_rec_len);
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res = file_rec_len;
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} else {
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res = -EOPNOTSUPP;
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goto end_getxattr_finder_info;
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}
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} else
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res = size ? -ERANGE : record_len;
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end_getxattr_finder_info:
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if (size >= record_len)
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hfs_find_exit(&fd);
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return res;
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}
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ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
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void *value, size_t size)
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{
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struct inode *inode = dentry->d_inode;
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struct hfs_find_data fd;
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hfsplus_attr_entry *entry;
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__be32 xattr_record_type;
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u32 record_type;
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u16 record_length = 0;
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ssize_t res = 0;
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if ((!S_ISREG(inode->i_mode) &&
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!S_ISDIR(inode->i_mode)) ||
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HFSPLUS_IS_RSRC(inode))
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return -EOPNOTSUPP;
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if (strncmp(name, XATTR_MAC_OSX_PREFIX,
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XATTR_MAC_OSX_PREFIX_LEN) == 0) {
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/* skip "osx." prefix */
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name += XATTR_MAC_OSX_PREFIX_LEN;
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/*
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* Don't allow retrieving properly prefixed attributes
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* by prepending them with "osx."
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*/
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if (is_known_namespace(name))
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return -EOPNOTSUPP;
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}
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if (!strcmp_xattr_finder_info(name))
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return hfsplus_getxattr_finder_info(dentry, value, size);
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if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
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return -EOPNOTSUPP;
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entry = hfsplus_alloc_attr_entry();
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if (!entry) {
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printk(KERN_ERR "hfs: can't allocate xattr entry\n");
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return -ENOMEM;
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}
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res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->attr_tree, &fd);
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if (res) {
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printk(KERN_ERR "hfs: can't init xattr find struct\n");
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goto failed_getxattr_init;
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}
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res = hfsplus_find_attr(inode->i_sb, inode->i_ino, name, &fd);
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|
|
if (res) {
|
||
|
|
if (res == -ENOENT)
|
||
|
|
res = -ENODATA;
|
||
|
|
else
|
||
|
|
printk(KERN_ERR "hfs: xattr searching failed\n");
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
hfs_bnode_read(fd.bnode, &xattr_record_type,
|
||
|
|
fd.entryoffset, sizeof(xattr_record_type));
|
||
|
|
record_type = be32_to_cpu(xattr_record_type);
|
||
|
|
if (record_type == HFSPLUS_ATTR_INLINE_DATA) {
|
||
|
|
record_length = hfs_bnode_read_u16(fd.bnode,
|
||
|
|
fd.entryoffset +
|
||
|
|
offsetof(struct hfsplus_attr_inline_data,
|
||
|
|
length));
|
||
|
|
if (record_length > HFSPLUS_MAX_INLINE_DATA_SIZE) {
|
||
|
|
printk(KERN_ERR "hfs: invalid xattr record size\n");
|
||
|
|
res = -EIO;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
} else if (record_type == HFSPLUS_ATTR_FORK_DATA ||
|
||
|
|
record_type == HFSPLUS_ATTR_EXTENTS) {
|
||
|
|
printk(KERN_ERR "hfs: only inline data xattr are supported\n");
|
||
|
|
res = -EOPNOTSUPP;
|
||
|
|
goto out;
|
||
|
|
} else {
|
||
|
|
printk(KERN_ERR "hfs: invalid xattr record\n");
|
||
|
|
res = -EIO;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (size) {
|
||
|
|
hfs_bnode_read(fd.bnode, entry, fd.entryoffset,
|
||
|
|
offsetof(struct hfsplus_attr_inline_data,
|
||
|
|
raw_bytes) + record_length);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (size >= record_length) {
|
||
|
|
memcpy(value, entry->inline_data.raw_bytes, record_length);
|
||
|
|
res = record_length;
|
||
|
|
} else
|
||
|
|
res = size ? -ERANGE : record_length;
|
||
|
|
|
||
|
|
out:
|
||
|
|
hfs_find_exit(&fd);
|
||
|
|
|
||
|
|
failed_getxattr_init:
|
||
|
|
hfsplus_destroy_attr_entry(entry);
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int can_list(const char *xattr_name)
|
||
|
|
{
|
||
|
|
if (!xattr_name)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
return strncmp(xattr_name, XATTR_TRUSTED_PREFIX,
|
||
|
|
XATTR_TRUSTED_PREFIX_LEN) ||
|
||
|
|
capable(CAP_SYS_ADMIN);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t hfsplus_listxattr_finder_info(struct dentry *dentry,
|
||
|
|
char *buffer, size_t size)
|
||
|
|
{
|
||
|
|
ssize_t res = 0;
|
||
|
|
struct inode *inode = dentry->d_inode;
|
||
|
|
struct hfs_find_data fd;
|
||
|
|
u16 entry_type;
|
||
|
|
u8 folder_finder_info[sizeof(struct DInfo) + sizeof(struct DXInfo)];
|
||
|
|
u8 file_finder_info[sizeof(struct FInfo) + sizeof(struct FXInfo)];
|
||
|
|
unsigned long len, found_bit;
|
||
|
|
int xattr_name_len, symbols_count;
|
||
|
|
|
||
|
|
res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
|
||
|
|
if (res) {
|
||
|
|
printk(KERN_ERR "hfs: can't init xattr find struct\n");
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
|
||
|
|
if (res)
|
||
|
|
goto end_listxattr_finder_info;
|
||
|
|
|
||
|
|
entry_type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
|
||
|
|
if (entry_type == HFSPLUS_FOLDER) {
|
||
|
|
len = sizeof(struct DInfo) + sizeof(struct DXInfo);
|
||
|
|
hfs_bnode_read(fd.bnode, folder_finder_info,
|
||
|
|
fd.entryoffset +
|
||
|
|
offsetof(struct hfsplus_cat_folder, user_info),
|
||
|
|
len);
|
||
|
|
found_bit = find_first_bit((void *)folder_finder_info, len*8);
|
||
|
|
} else if (entry_type == HFSPLUS_FILE) {
|
||
|
|
len = sizeof(struct FInfo) + sizeof(struct FXInfo);
|
||
|
|
hfs_bnode_read(fd.bnode, file_finder_info,
|
||
|
|
fd.entryoffset +
|
||
|
|
offsetof(struct hfsplus_cat_file, user_info),
|
||
|
|
len);
|
||
|
|
found_bit = find_first_bit((void *)file_finder_info, len*8);
|
||
|
|
} else {
|
||
|
|
res = -EOPNOTSUPP;
|
||
|
|
goto end_listxattr_finder_info;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (found_bit >= (len*8))
|
||
|
|
res = 0;
|
||
|
|
else {
|
||
|
|
symbols_count = sizeof(HFSPLUS_XATTR_FINDER_INFO_NAME) - 1;
|
||
|
|
xattr_name_len =
|
||
|
|
name_len(HFSPLUS_XATTR_FINDER_INFO_NAME, symbols_count);
|
||
|
|
if (!buffer || !size) {
|
||
|
|
if (can_list(HFSPLUS_XATTR_FINDER_INFO_NAME))
|
||
|
|
res = xattr_name_len;
|
||
|
|
} else if (can_list(HFSPLUS_XATTR_FINDER_INFO_NAME)) {
|
||
|
|
if (size < xattr_name_len)
|
||
|
|
res = -ERANGE;
|
||
|
|
else {
|
||
|
|
res = copy_name(buffer,
|
||
|
|
HFSPLUS_XATTR_FINDER_INFO_NAME,
|
||
|
|
symbols_count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
end_listxattr_finder_info:
|
||
|
|
hfs_find_exit(&fd);
|
||
|
|
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size)
|
||
|
|
{
|
||
|
|
ssize_t err;
|
||
|
|
ssize_t res = 0;
|
||
|
|
struct inode *inode = dentry->d_inode;
|
||
|
|
struct hfs_find_data fd;
|
||
|
|
u16 key_len = 0;
|
||
|
|
struct hfsplus_attr_key attr_key;
|
||
|
|
char strbuf[HFSPLUS_ATTR_MAX_STRLEN +
|
||
|
|
XATTR_MAC_OSX_PREFIX_LEN + 1] = {0};
|
||
|
|
int xattr_name_len;
|
||
|
|
|
||
|
|
if ((!S_ISREG(inode->i_mode) &&
|
||
|
|
!S_ISDIR(inode->i_mode)) ||
|
||
|
|
HFSPLUS_IS_RSRC(inode))
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
|
||
|
|
res = hfsplus_listxattr_finder_info(dentry, buffer, size);
|
||
|
|
if (res < 0)
|
||
|
|
return res;
|
||
|
|
else if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
|
||
|
|
return (res == 0) ? -EOPNOTSUPP : res;
|
||
|
|
|
||
|
|
err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->attr_tree, &fd);
|
||
|
|
if (err) {
|
||
|
|
printk(KERN_ERR "hfs: can't init xattr find struct\n");
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
err = hfsplus_find_attr(inode->i_sb, inode->i_ino, NULL, &fd);
|
||
|
|
if (err) {
|
||
|
|
if (err == -ENOENT) {
|
||
|
|
if (res == 0)
|
||
|
|
res = -ENODATA;
|
||
|
|
goto end_listxattr;
|
||
|
|
} else {
|
||
|
|
res = err;
|
||
|
|
goto end_listxattr;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (;;) {
|
||
|
|
key_len = hfs_bnode_read_u16(fd.bnode, fd.keyoffset);
|
||
|
|
if (key_len == 0 || key_len > fd.tree->max_key_len) {
|
||
|
|
printk(KERN_ERR "hfs: invalid xattr key length: %d\n",
|
||
|
|
key_len);
|
||
|
|
res = -EIO;
|
||
|
|
goto end_listxattr;
|
||
|
|
}
|
||
|
|
|
||
|
|
hfs_bnode_read(fd.bnode, &attr_key,
|
||
|
|
fd.keyoffset, key_len + sizeof(key_len));
|
||
|
|
|
||
|
|
if (be32_to_cpu(attr_key.cnid) != inode->i_ino)
|
||
|
|
goto end_listxattr;
|
||
|
|
|
||
|
|
xattr_name_len = HFSPLUS_ATTR_MAX_STRLEN;
|
||
|
|
if (hfsplus_uni2asc(inode->i_sb,
|
||
|
|
(const struct hfsplus_unistr *)&fd.key->attr.key_name,
|
||
|
|
strbuf, &xattr_name_len)) {
|
||
|
|
printk(KERN_ERR "hfs: unicode conversion failed\n");
|
||
|
|
res = -EIO;
|
||
|
|
goto end_listxattr;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!buffer || !size) {
|
||
|
|
if (can_list(strbuf))
|
||
|
|
res += name_len(strbuf, xattr_name_len);
|
||
|
|
} else if (can_list(strbuf)) {
|
||
|
|
if (size < (res + name_len(strbuf, xattr_name_len))) {
|
||
|
|
res = -ERANGE;
|
||
|
|
goto end_listxattr;
|
||
|
|
} else
|
||
|
|
res += copy_name(buffer + res,
|
||
|
|
strbuf, xattr_name_len);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (hfs_brec_goto(&fd, 1))
|
||
|
|
goto end_listxattr;
|
||
|
|
}
|
||
|
|
|
||
|
|
end_listxattr:
|
||
|
|
hfs_find_exit(&fd);
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
int hfsplus_removexattr(struct dentry *dentry, const char *name)
|
||
|
|
{
|
||
|
|
int err = 0;
|
||
|
|
struct inode *inode = dentry->d_inode;
|
||
|
|
struct hfs_find_data cat_fd;
|
||
|
|
u16 flags;
|
||
|
|
u16 cat_entry_type;
|
||
|
|
int is_xattr_acl_deleted = 0;
|
||
|
|
int is_all_xattrs_deleted = 0;
|
||
|
|
|
||
|
|
if ((!S_ISREG(inode->i_mode) &&
|
||
|
|
!S_ISDIR(inode->i_mode)) ||
|
||
|
|
HFSPLUS_IS_RSRC(inode))
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
|
||
|
|
if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
|
||
|
|
err = can_set_xattr(inode, name, NULL, 0);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
if (strncmp(name, XATTR_MAC_OSX_PREFIX,
|
||
|
|
XATTR_MAC_OSX_PREFIX_LEN) == 0)
|
||
|
|
name += XATTR_MAC_OSX_PREFIX_LEN;
|
||
|
|
|
||
|
|
if (!strcmp_xattr_finder_info(name))
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
|
||
|
|
err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &cat_fd);
|
||
|
|
if (err) {
|
||
|
|
printk(KERN_ERR "hfs: can't init xattr find struct\n");
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &cat_fd);
|
||
|
|
if (err) {
|
||
|
|
printk(KERN_ERR "hfs: catalog searching failed\n");
|
||
|
|
goto end_removexattr;
|
||
|
|
}
|
||
|
|
|
||
|
|
err = hfsplus_delete_attr(inode, name);
|
||
|
|
if (err)
|
||
|
|
goto end_removexattr;
|
||
|
|
|
||
|
|
is_xattr_acl_deleted = !strcmp_xattr_acl(name);
|
||
|
|
is_all_xattrs_deleted = !hfsplus_attr_exists(inode, NULL);
|
||
|
|
|
||
|
|
if (!is_xattr_acl_deleted && !is_all_xattrs_deleted)
|
||
|
|
goto end_removexattr;
|
||
|
|
|
||
|
|
cat_entry_type = hfs_bnode_read_u16(cat_fd.bnode, cat_fd.entryoffset);
|
||
|
|
|
||
|
|
if (cat_entry_type == HFSPLUS_FOLDER) {
|
||
|
|
flags = hfs_bnode_read_u16(cat_fd.bnode, cat_fd.entryoffset +
|
||
|
|
offsetof(struct hfsplus_cat_folder, flags));
|
||
|
|
if (is_xattr_acl_deleted)
|
||
|
|
flags &= ~HFSPLUS_ACL_EXISTS;
|
||
|
|
if (is_all_xattrs_deleted)
|
||
|
|
flags &= ~HFSPLUS_XATTR_EXISTS;
|
||
|
|
hfs_bnode_write_u16(cat_fd.bnode, cat_fd.entryoffset +
|
||
|
|
offsetof(struct hfsplus_cat_folder, flags),
|
||
|
|
flags);
|
||
|
|
hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
|
||
|
|
} else if (cat_entry_type == HFSPLUS_FILE) {
|
||
|
|
flags = hfs_bnode_read_u16(cat_fd.bnode, cat_fd.entryoffset +
|
||
|
|
offsetof(struct hfsplus_cat_file, flags));
|
||
|
|
if (is_xattr_acl_deleted)
|
||
|
|
flags &= ~HFSPLUS_ACL_EXISTS;
|
||
|
|
if (is_all_xattrs_deleted)
|
||
|
|
flags &= ~HFSPLUS_XATTR_EXISTS;
|
||
|
|
hfs_bnode_write_u16(cat_fd.bnode, cat_fd.entryoffset +
|
||
|
|
offsetof(struct hfsplus_cat_file, flags),
|
||
|
|
flags);
|
||
|
|
hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
|
||
|
|
} else {
|
||
|
|
printk(KERN_ERR "hfs: invalid catalog entry type\n");
|
||
|
|
err = -EIO;
|
||
|
|
goto end_removexattr;
|
||
|
|
}
|
||
|
|
|
||
|
|
end_removexattr:
|
||
|
|
hfs_find_exit(&cat_fd);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int hfsplus_osx_getxattr(struct dentry *dentry, const char *name,
|
||
|
|
void *buffer, size_t size, int type)
|
||
|
|
{
|
||
|
|
char xattr_name[HFSPLUS_ATTR_MAX_STRLEN +
|
||
|
|
XATTR_MAC_OSX_PREFIX_LEN + 1] = {0};
|
||
|
|
size_t len = strlen(name);
|
||
|
|
|
||
|
|
if (!strcmp(name, ""))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (len > HFSPLUS_ATTR_MAX_STRLEN)
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
|
||
|
|
strcpy(xattr_name, XATTR_MAC_OSX_PREFIX);
|
||
|
|
strcpy(xattr_name + XATTR_MAC_OSX_PREFIX_LEN, name);
|
||
|
|
|
||
|
|
return hfsplus_getxattr(dentry, xattr_name, buffer, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int hfsplus_osx_setxattr(struct dentry *dentry, const char *name,
|
||
|
|
const void *buffer, size_t size, int flags, int type)
|
||
|
|
{
|
||
|
|
char xattr_name[HFSPLUS_ATTR_MAX_STRLEN +
|
||
|
|
XATTR_MAC_OSX_PREFIX_LEN + 1] = {0};
|
||
|
|
size_t len = strlen(name);
|
||
|
|
|
||
|
|
if (!strcmp(name, ""))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (len > HFSPLUS_ATTR_MAX_STRLEN)
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
|
||
|
|
strcpy(xattr_name, XATTR_MAC_OSX_PREFIX);
|
||
|
|
strcpy(xattr_name + XATTR_MAC_OSX_PREFIX_LEN, name);
|
||
|
|
|
||
|
|
return hfsplus_setxattr(dentry, xattr_name, buffer, size, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
static size_t hfsplus_osx_listxattr(struct dentry *dentry, char *list,
|
||
|
|
size_t list_size, const char *name, size_t name_len, int type)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* This method is not used.
|
||
|
|
* It is used hfsplus_listxattr() instead of generic_listxattr().
|
||
|
|
*/
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
}
|
||
|
|
|
||
|
|
const struct xattr_handler hfsplus_xattr_osx_handler = {
|
||
|
|
.prefix = XATTR_MAC_OSX_PREFIX,
|
||
|
|
.list = hfsplus_osx_listxattr,
|
||
|
|
.get = hfsplus_osx_getxattr,
|
||
|
|
.set = hfsplus_osx_setxattr,
|
||
|
|
};
|