mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-11-18 18:31:00 +03:00
eb51a9d747
If sufficient memory (<2K, realistically) is available, libzfs_init() can be significantly shorted by iterating over the correct sysfs directory before registrations, we can turn 168 stats into 15/18 syscalls (3 opens (6 if built in), 3 fstats, 6 getdentses, and 3 closes), a tenfoldish reduction; this is probably a bit faster, too. The list is always optional, and registration functions (and one-off users) can simply pass NULL, which will fall back to the previous mechanism Also, don't allocate in zfs_mod_supported_impl, and use use access() instead of stat(), since existence is really what we care about Also, fix pre-prop-checking compat in fallback for built-in ZFS Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Closes #12089
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/*
|
|
* 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) 2018 by Delphix. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _SYS_ZFS_SYSFS_H
|
|
#define _SYS_ZFS_SYSFS_H extern __attribute__((visibility("default")))
|
|
|
|
struct zfs_mod_supported_features;
|
|
struct zfs_mod_supported_features *zfs_mod_list_supported(const char *scope);
|
|
void zfs_mod_list_supported_free(struct zfs_mod_supported_features *);
|
|
|
|
#ifdef _KERNEL
|
|
|
|
void zfs_sysfs_init(void);
|
|
void zfs_sysfs_fini(void);
|
|
|
|
#else
|
|
|
|
#define zfs_sysfs_init()
|
|
#define zfs_sysfs_fini()
|
|
|
|
_SYS_ZFS_SYSFS_H boolean_t zfs_mod_supported(const char *, const char *,
|
|
const struct zfs_mod_supported_features *);
|
|
#endif
|
|
|
|
#define ZFS_SYSFS_POOL_PROPERTIES "properties.pool"
|
|
#define ZFS_SYSFS_VDEV_PROPERTIES "properties.vdev"
|
|
#define ZFS_SYSFS_DATASET_PROPERTIES "properties.dataset"
|
|
#define ZFS_SYSFS_KERNEL_FEATURES "features.kernel"
|
|
#define ZFS_SYSFS_POOL_FEATURES "features.pool"
|
|
|
|
#define ZFS_SYSFS_DIR "/sys/module/zfs"
|
|
/* Alternate location when ZFS is built as part of the kernel (rare) */
|
|
#define ZFS_SYSFS_ALT_DIR "/sys/fs/zfs"
|
|
|
|
#endif /* _SYS_ZFS_SYSFS_H */
|