| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License (the "License"). |
| * You may not use this file except in compliance with the License. |
| * |
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| |
| /* |
| * Copyright (C) 2011 Lawrence Livermore National Security, LLC. |
| */ |
| |
| #ifndef _ZFS_XATTR_H |
| #define _ZFS_XATTR_H |
| |
| #include <linux/posix_acl_xattr.h> |
| |
| /* |
| * 2.6.35 API change, |
| * The const keyword was added to the 'struct xattr_handler' in the |
| * generic Linux super_block structure. To handle this we define an |
| * appropriate xattr_handler_t typedef which can be used. This was |
| * the preferred solution because it keeps the code clean and readable. |
| */ |
| typedef const struct xattr_handler xattr_handler_t; |
| |
| /* |
| * 4.5 API change, |
| */ |
| #if defined(HAVE_XATTR_LIST_SIMPLE) |
| #define ZPL_XATTR_LIST_WRAPPER(fn) \ |
| static bool \ |
| fn(struct dentry *dentry) \ |
| { \ |
| return (!!__ ## fn(dentry->d_inode, NULL, 0, NULL, 0)); \ |
| } |
| /* |
| * 4.4 API change, |
| */ |
| #elif defined(HAVE_XATTR_LIST_DENTRY) |
| #define ZPL_XATTR_LIST_WRAPPER(fn) \ |
| static size_t \ |
| fn(struct dentry *dentry, char *list, size_t list_size, \ |
| const char *name, size_t name_len, int type) \ |
| { \ |
| return (__ ## fn(dentry->d_inode, \ |
| list, list_size, name, name_len)); \ |
| } |
| /* |
| * 2.6.33 API change, |
| */ |
| #elif defined(HAVE_XATTR_LIST_HANDLER) |
| #define ZPL_XATTR_LIST_WRAPPER(fn) \ |
| static size_t \ |
| fn(const struct xattr_handler *handler, struct dentry *dentry, \ |
| char *list, size_t list_size, const char *name, size_t name_len) \ |
| { \ |
| return (__ ## fn(dentry->d_inode, \ |
| list, list_size, name, name_len)); \ |
| } |
| #else |
| #error "Unsupported kernel" |
| #endif |
| |
| /* |
| * 4.7 API change, |
| * The xattr_handler->get() callback was changed to take a both dentry and |
| * inode, because the dentry might not be attached to an inode yet. |
| */ |
| #if defined(HAVE_XATTR_GET_DENTRY_INODE) |
| #define ZPL_XATTR_GET_WRAPPER(fn) \ |
| static int \ |
| fn(const struct xattr_handler *handler, struct dentry *dentry, \ |
| struct inode *inode, const char *name, void *buffer, size_t size) \ |
| { \ |
| return (__ ## fn(inode, name, buffer, size)); \ |
| } |
| /* |
| * 4.4 API change, |
| * The xattr_handler->get() callback was changed to take a xattr_handler, |
| * and handler_flags argument was removed and should be accessed by |
| * handler->flags. |
| */ |
| #elif defined(HAVE_XATTR_GET_HANDLER) |
| #define ZPL_XATTR_GET_WRAPPER(fn) \ |
| static int \ |
| fn(const struct xattr_handler *handler, struct dentry *dentry, \ |
| const char *name, void *buffer, size_t size) \ |
| { \ |
| return (__ ## fn(dentry->d_inode, name, buffer, size)); \ |
| } |
| /* |
| * 2.6.33 API change, |
| * The xattr_handler->get() callback was changed to take a dentry |
| * instead of an inode, and a handler_flags argument was added. |
| */ |
| #elif defined(HAVE_XATTR_GET_DENTRY) |
| #define ZPL_XATTR_GET_WRAPPER(fn) \ |
| static int \ |
| fn(struct dentry *dentry, const char *name, void *buffer, size_t size, \ |
| int unused_handler_flags) \ |
| { \ |
| return (__ ## fn(dentry->d_inode, name, buffer, size)); \ |
| } |
| /* |
| * Android API change, |
| * The xattr_handler->get() callback was changed to take a dentry and inode |
| * and flags, because the dentry might not be attached to an inode yet. |
| */ |
| #elif defined(HAVE_XATTR_GET_DENTRY_INODE_FLAGS) |
| #define ZPL_XATTR_GET_WRAPPER(fn) \ |
| static int \ |
| fn(const struct xattr_handler *handler, struct dentry *dentry, \ |
| struct inode *inode, const char *name, void *buffer, \ |
| size_t size, int flags) \ |
| { \ |
| return (__ ## fn(inode, name, buffer, size)); \ |
| } |
| #else |
| #error "Unsupported kernel" |
| #endif |
| |
| /* |
| * 6.3 API change, |
| * The xattr_handler->set() callback was changed to take the |
| * struct mnt_idmap* as the first arg, to support idmapped |
| * mounts. |
| */ |
| #if defined(HAVE_XATTR_SET_IDMAP) |
| #define ZPL_XATTR_SET_WRAPPER(fn) \ |
| static int \ |
| fn(const struct xattr_handler *handler, struct mnt_idmap *user_ns, \ |
| struct dentry *dentry, struct inode *inode, const char *name, \ |
| const void *buffer, size_t size, int flags) \ |
| { \ |
| return (__ ## fn(user_ns, inode, name, buffer, size, flags)); \ |
| } |
| /* |
| * 5.12 API change, |
| * The xattr_handler->set() callback was changed to take the |
| * struct user_namespace* as the first arg, to support idmapped |
| * mounts. |
| */ |
| #elif defined(HAVE_XATTR_SET_USERNS) |
| #define ZPL_XATTR_SET_WRAPPER(fn) \ |
| static int \ |
| fn(const struct xattr_handler *handler, struct user_namespace *user_ns, \ |
| struct dentry *dentry, struct inode *inode, const char *name, \ |
| const void *buffer, size_t size, int flags) \ |
| { \ |
| return (__ ## fn(user_ns, inode, name, buffer, size, flags)); \ |
| } |
| /* |
| * 4.7 API change, |
| * The xattr_handler->set() callback was changed to take a both dentry and |
| * inode, because the dentry might not be attached to an inode yet. |
| */ |
| #elif defined(HAVE_XATTR_SET_DENTRY_INODE) |
| #define ZPL_XATTR_SET_WRAPPER(fn) \ |
| static int \ |
| fn(const struct xattr_handler *handler, struct dentry *dentry, \ |
| struct inode *inode, const char *name, const void *buffer, \ |
| size_t size, int flags) \ |
| { \ |
| return (__ ## fn(kcred->user_ns, inode, name, buffer, size, flags));\ |
| } |
| /* |
| * 4.4 API change, |
| * The xattr_handler->set() callback was changed to take a xattr_handler, |
| * and handler_flags argument was removed and should be accessed by |
| * handler->flags. |
| */ |
| #elif defined(HAVE_XATTR_SET_HANDLER) |
| #define ZPL_XATTR_SET_WRAPPER(fn) \ |
| static int \ |
| fn(const struct xattr_handler *handler, struct dentry *dentry, \ |
| const char *name, const void *buffer, size_t size, int flags) \ |
| { \ |
| return (__ ## fn(kcred->user_ns, dentry->d_inode, name, \ |
| buffer, size, flags)); \ |
| } |
| /* |
| * 2.6.33 API change, |
| * The xattr_handler->set() callback was changed to take a dentry |
| * instead of an inode, and a handler_flags argument was added. |
| */ |
| #elif defined(HAVE_XATTR_SET_DENTRY) |
| #define ZPL_XATTR_SET_WRAPPER(fn) \ |
| static int \ |
| fn(struct dentry *dentry, const char *name, const void *buffer, \ |
| size_t size, int flags, int unused_handler_flags) \ |
| { \ |
| return (__ ## fn(kcred->user_ns, dentry->d_inode, name, buffer, \ |
| size, flags)); \ |
| } |
| #else |
| #error "Unsupported kernel" |
| #endif |
| |
| /* |
| * Linux 3.7 API change. posix_acl_{from,to}_xattr gained the user_ns |
| * parameter. All callers are expected to pass the &init_user_ns which |
| * is available through the init credential (kcred). |
| */ |
| static inline struct posix_acl * |
| zpl_acl_from_xattr(const void *value, int size) |
| { |
| return (posix_acl_from_xattr(kcred->user_ns, value, size)); |
| } |
| |
| static inline int |
| zpl_acl_to_xattr(struct posix_acl *acl, void *value, int size) |
| { |
| return (posix_acl_to_xattr(kcred->user_ns, acl, value, size)); |
| } |
| |
| #endif /* _ZFS_XATTR_H */ |