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mirror_zfs/include/os/linux/zfs/sys/zpl.h
Coleman Kane fe9d409e90 Linux 6.6 compat: use inode_get/set_ctime*(...) 
In Linux commit 13bc24457850583a2e7203ded05b7209ab4bc5ef, direct access
to the i_ctime member of struct inode was removed. The new approach is
to use accessor methods that exclusively handle passing the timestamp
around by value. This change adds new tests for each of these functions
and introduces zpl_* equivalents in include/os/linux/zfs/sys/zpl.h. In
where the inode_get/set_ctime*() functions exist, these zpl_* calls will
be mapped to the new functions. On older kernels, these macros just wrap
direct-access calls. The code that operated on an address of ip->i_ctime
to call ZFS_TIME_DECODE() now will take a local copy using
zpl_inode_get_ctime(), and then pass the address of the local copy when
performing the ZFS_TIME_DECODE() call, in all cases, rather than
directly accessing the member.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Coleman Kane <ckane@colemankane.org>
Closes #15263
Closes #15257
2023-11-08 12:15:41 -08:00

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/*
* 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 https://opensource.org/licenses/CDDL-1.0.
* 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 _SYS_ZPL_H
#define _SYS_ZPL_H
#include <sys/mntent.h>
#include <sys/vfs.h>
#include <linux/aio.h>
#include <linux/dcache_compat.h>
#include <linux/exportfs.h>
#include <linux/falloc.h>
#include <linux/parser.h>
#include <linux/task_io_accounting_ops.h>
#include <linux/vfs_compat.h>
#include <linux/writeback.h>
#include <linux/xattr_compat.h>
/* zpl_inode.c */
extern void zpl_vap_init(vattr_t *vap, struct inode *dir,
umode_t mode, cred_t *cr, zidmap_t *mnt_ns);
extern const struct inode_operations zpl_inode_operations;
#ifdef HAVE_RENAME2_OPERATIONS_WRAPPER
extern const struct inode_operations_wrapper zpl_dir_inode_operations;
#else
extern const struct inode_operations zpl_dir_inode_operations;
#endif
extern const struct inode_operations zpl_symlink_inode_operations;
extern const struct inode_operations zpl_special_inode_operations;
/* zpl_file.c */
extern const struct address_space_operations zpl_address_space_operations;
#ifdef HAVE_VFS_FILE_OPERATIONS_EXTEND
extern const struct file_operations_extend zpl_file_operations;
#else
extern const struct file_operations zpl_file_operations;
#endif
extern const struct file_operations zpl_dir_file_operations;
/* zpl_super.c */
extern void zpl_prune_sb(int64_t nr_to_scan, void *arg);
extern const struct super_operations zpl_super_operations;
extern const struct export_operations zpl_export_operations;
extern struct file_system_type zpl_fs_type;
/* zpl_xattr.c */
extern ssize_t zpl_xattr_list(struct dentry *dentry, char *buf, size_t size);
extern int zpl_xattr_security_init(struct inode *ip, struct inode *dip,
const struct qstr *qstr);
#if defined(CONFIG_FS_POSIX_ACL)
#if defined(HAVE_SET_ACL)
#if defined(HAVE_SET_ACL_IDMAP_DENTRY)
extern int zpl_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
struct posix_acl *acl, int type);
#elif defined(HAVE_SET_ACL_USERNS)
extern int zpl_set_acl(struct user_namespace *userns, struct inode *ip,
struct posix_acl *acl, int type);
#elif defined(HAVE_SET_ACL_USERNS_DENTRY_ARG2)
extern int zpl_set_acl(struct user_namespace *userns, struct dentry *dentry,
struct posix_acl *acl, int type);
#else
extern int zpl_set_acl(struct inode *ip, struct posix_acl *acl, int type);
#endif /* HAVE_SET_ACL_USERNS */
#endif /* HAVE_SET_ACL */
#if defined(HAVE_GET_ACL_RCU) || defined(HAVE_GET_INODE_ACL)
extern struct posix_acl *zpl_get_acl(struct inode *ip, int type, bool rcu);
#elif defined(HAVE_GET_ACL)
extern struct posix_acl *zpl_get_acl(struct inode *ip, int type);
#endif
extern int zpl_init_acl(struct inode *ip, struct inode *dir);
extern int zpl_chmod_acl(struct inode *ip);
#else
static inline int
zpl_init_acl(struct inode *ip, struct inode *dir)
{
return (0);
}
static inline int
zpl_chmod_acl(struct inode *ip)
{
return (0);
}
#endif /* CONFIG_FS_POSIX_ACL */
extern xattr_handler_t *zpl_xattr_handlers[];
/* zpl_ctldir.c */
extern const struct file_operations zpl_fops_root;
extern const struct inode_operations zpl_ops_root;
extern const struct file_operations zpl_fops_snapdir;
extern const struct inode_operations zpl_ops_snapdir;
extern const struct file_operations zpl_fops_shares;
extern const struct inode_operations zpl_ops_shares;
#if defined(HAVE_VFS_ITERATE) || defined(HAVE_VFS_ITERATE_SHARED)
#define ZPL_DIR_CONTEXT_INIT(_dirent, _actor, _pos) { \
.actor = _actor, \
.pos = _pos, \
}
typedef struct dir_context zpl_dir_context_t;
#define zpl_dir_emit dir_emit
#define zpl_dir_emit_dot dir_emit_dot
#define zpl_dir_emit_dotdot dir_emit_dotdot
#define zpl_dir_emit_dots dir_emit_dots
#else
typedef struct zpl_dir_context {
void *dirent;
const filldir_t actor;
loff_t pos;
} zpl_dir_context_t;
#define ZPL_DIR_CONTEXT_INIT(_dirent, _actor, _pos) { \
.dirent = _dirent, \
.actor = _actor, \
.pos = _pos, \
}
static inline bool
zpl_dir_emit(zpl_dir_context_t *ctx, const char *name, int namelen,
uint64_t ino, unsigned type)
{
return (!ctx->actor(ctx->dirent, name, namelen, ctx->pos, ino, type));
}
static inline bool
zpl_dir_emit_dot(struct file *file, zpl_dir_context_t *ctx)
{
return (ctx->actor(ctx->dirent, ".", 1, ctx->pos,
file_inode(file)->i_ino, DT_DIR) == 0);
}
static inline bool
zpl_dir_emit_dotdot(struct file *file, zpl_dir_context_t *ctx)
{
return (ctx->actor(ctx->dirent, "..", 2, ctx->pos,
parent_ino(file_dentry(file)), DT_DIR) == 0);
}
static inline bool
zpl_dir_emit_dots(struct file *file, zpl_dir_context_t *ctx)
{
if (ctx->pos == 0) {
if (!zpl_dir_emit_dot(file, ctx))
return (false);
ctx->pos = 1;
}
if (ctx->pos == 1) {
if (!zpl_dir_emit_dotdot(file, ctx))
return (false);
ctx->pos = 2;
}
return (true);
}
#endif /* HAVE_VFS_ITERATE */
/* zpl_file_range.c */
/* handlers for file_operations of the same name */
extern ssize_t zpl_copy_file_range(struct file *src_file, loff_t src_off,
struct file *dst_file, loff_t dst_off, size_t len, unsigned int flags);
extern loff_t zpl_remap_file_range(struct file *src_file, loff_t src_off,
struct file *dst_file, loff_t dst_off, loff_t len, unsigned int flags);
extern int zpl_clone_file_range(struct file *src_file, loff_t src_off,
struct file *dst_file, loff_t dst_off, uint64_t len);
extern int zpl_dedupe_file_range(struct file *src_file, loff_t src_off,
struct file *dst_file, loff_t dst_off, uint64_t len);
/* compat for FICLONE/FICLONERANGE/FIDEDUPERANGE ioctls */
typedef struct {
int64_t fcr_src_fd;
uint64_t fcr_src_offset;
uint64_t fcr_src_length;
uint64_t fcr_dest_offset;
} zfs_ioc_compat_file_clone_range_t;
typedef struct {
int64_t fdri_dest_fd;
uint64_t fdri_dest_offset;
uint64_t fdri_bytes_deduped;
int32_t fdri_status;
uint32_t fdri_reserved;
} zfs_ioc_compat_dedupe_range_info_t;
typedef struct {
uint64_t fdr_src_offset;
uint64_t fdr_src_length;
uint16_t fdr_dest_count;
uint16_t fdr_reserved1;
uint32_t fdr_reserved2;
zfs_ioc_compat_dedupe_range_info_t fdr_info[];
} zfs_ioc_compat_dedupe_range_t;
#define ZFS_IOC_COMPAT_FICLONE _IOW(0x94, 9, int)
#define ZFS_IOC_COMPAT_FICLONERANGE \
_IOW(0x94, 13, zfs_ioc_compat_file_clone_range_t)
#define ZFS_IOC_COMPAT_FIDEDUPERANGE \
_IOWR(0x94, 54, zfs_ioc_compat_dedupe_range_t)
extern long zpl_ioctl_ficlone(struct file *filp, void *arg);
extern long zpl_ioctl_ficlonerange(struct file *filp, void *arg);
extern long zpl_ioctl_fideduperange(struct file *filp, void *arg);
#if defined(HAVE_INODE_TIMESTAMP_TRUNCATE)
#define zpl_inode_timestamp_truncate(ts, ip) timestamp_truncate(ts, ip)
#elif defined(HAVE_INODE_TIMESPEC64_TIMES)
#define zpl_inode_timestamp_truncate(ts, ip) \
timespec64_trunc(ts, (ip)->i_sb->s_time_gran)
#else
#define zpl_inode_timestamp_truncate(ts, ip) \
timespec_trunc(ts, (ip)->i_sb->s_time_gran)
#endif
#if defined(HAVE_INODE_OWNER_OR_CAPABLE)
#define zpl_inode_owner_or_capable(ns, ip) inode_owner_or_capable(ip)
#elif defined(HAVE_INODE_OWNER_OR_CAPABLE_USERNS)
#define zpl_inode_owner_or_capable(ns, ip) inode_owner_or_capable(ns, ip)
#elif defined(HAVE_INODE_OWNER_OR_CAPABLE_IDMAP)
#define zpl_inode_owner_or_capable(idmap, ip) inode_owner_or_capable(idmap, ip)
#else
#error "Unsupported kernel"
#endif
#if defined(HAVE_SETATTR_PREPARE_USERNS) || defined(HAVE_SETATTR_PREPARE_IDMAP)
#define zpl_setattr_prepare(ns, dentry, ia) setattr_prepare(ns, dentry, ia)
#else
/*
* Use kernel-provided version, or our own from
* linux/vfs_compat.h
*/
#define zpl_setattr_prepare(ns, dentry, ia) setattr_prepare(dentry, ia)
#endif
#ifdef HAVE_INODE_GET_CTIME
#define zpl_inode_get_ctime(ip) inode_get_ctime(ip)
#else
#define zpl_inode_get_ctime(ip) (ip->i_ctime)
#endif
#ifdef HAVE_INODE_SET_CTIME_TO_TS
#define zpl_inode_set_ctime_to_ts(ip, ts) inode_set_ctime_to_ts(ip, ts)
#else
#define zpl_inode_set_ctime_to_ts(ip, ts) (ip->i_ctime = ts)
#endif
#endif /* _SYS_ZPL_H */
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