/* * linux/fs/hfs/attr.c * * (C) 2003 Ardis Technologies <roman@ardistech.com> * * Export hfs data via xattr */ #include <linux/fs.h> #include <linux/xattr.h> #include "hfs_fs.h" #include "btree.h" int hfs_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; hfs_cat_rec rec; struct hfs_cat_file *file; int res; if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode)) return -EOPNOTSUPP; res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd); if (res) return res; fd.search_key->cat = HFS_I(inode)->cat_key; res = hfs_brec_find(&fd); if (res) goto out; hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, sizeof(struct hfs_cat_file)); file = &rec.file; if (!strcmp(name, "hfs.type")) { if (size == 4) memcpy(&file->UsrWds.fdType, value, 4); else res = -ERANGE; } else if (!strcmp(name, "hfs.creator")) { if (size == 4) memcpy(&file->UsrWds.fdCreator, value, 4); else res = -ERANGE; } else res = -EOPNOTSUPP; if (!res) hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, sizeof(struct hfs_cat_file)); out: hfs_find_exit(&fd); return res; } ssize_t hfs_getxattr(struct dentry *dentry, const char *name, void *value, size_t size) { struct inode *inode = dentry->d_inode; struct hfs_find_data fd; hfs_cat_rec rec; struct hfs_cat_file *file; ssize_t res = 0; if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode)) return -EOPNOTSUPP; if (size) { res = hfs_find_init(HFS_SB(inode->i_sb)->cat_tree, &fd); if (res) return res; fd.search_key->cat = HFS_I(inode)->cat_key; res = hfs_brec_find(&fd); if (res) goto out; hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, sizeof(struct hfs_cat_file)); } file = &rec.file; if (!strcmp(name, "hfs.type")) { if (size >= 4) { memcpy(value, &file->UsrWds.fdType, 4); res = 4; } else res = size ? -ERANGE : 4; } else if (!strcmp(name, "hfs.creator")) { if (size >= 4) { memcpy(value, &file->UsrWds.fdCreator, 4); res = 4; } else res = size ? -ERANGE : 4; } else res = -ENODATA; out: if (size) hfs_find_exit(&fd); return res; } #define HFS_ATTRLIST_SIZE (sizeof("hfs.creator")+sizeof("hfs.type")) ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size) { struct inode *inode = dentry->d_inode; if (!S_ISREG(inode->i_mode) || HFS_IS_RSRC(inode)) return -EOPNOTSUPP; if (!buffer || !size) return HFS_ATTRLIST_SIZE; if (size < HFS_ATTRLIST_SIZE) return -ERANGE; strcpy(buffer, "hfs.type"); strcpy(buffer + sizeof("hfs.type"), "hfs.creator"); return HFS_ATTRLIST_SIZE; }