mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-11-17 10:01:01 +03:00
009cc8e884
We limit the size of nvlists passed to the kernel so a user cannot make the kernel do an unreasonably large allocation. On FreeBSD this limit was 128 kiB, which turns out to be a bit too small when doing some operations involving a large number of datasets or snapshots, for example replication. Make this limit tunable, with a platform-specific auto default. Linux keeps its limit at KMALLOC_MAX_SIZE. FreeBSD uses 1/4 of the system limit on user wired memory, which allows it to scale depending on system configuration. Reviewed-by: Matt Macy <mmacy@FreeBSD.org> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ryan Moeller <freqlabs@FreeBSD.org> Issue #6572 Closes #10706
98 lines
3.1 KiB
C
98 lines
3.1 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
|
|
*/
|
|
|
|
|
|
#ifndef _ZFS_IOCTL_IMPL_H_
|
|
#define _ZFS_IOCTL_IMPL_H_
|
|
|
|
extern kmutex_t zfsdev_state_lock;
|
|
extern zfsdev_state_t *zfsdev_state_list;
|
|
extern unsigned long zfs_max_nvlist_src_size;
|
|
|
|
typedef int zfs_ioc_legacy_func_t(zfs_cmd_t *);
|
|
typedef int zfs_ioc_func_t(const char *, nvlist_t *, nvlist_t *);
|
|
typedef int zfs_secpolicy_func_t(zfs_cmd_t *, nvlist_t *, cred_t *);
|
|
|
|
typedef enum {
|
|
POOL_CHECK_NONE = 1 << 0,
|
|
POOL_CHECK_SUSPENDED = 1 << 1,
|
|
POOL_CHECK_READONLY = 1 << 2,
|
|
} zfs_ioc_poolcheck_t;
|
|
|
|
typedef enum {
|
|
NO_NAME,
|
|
POOL_NAME,
|
|
DATASET_NAME,
|
|
ENTITY_NAME
|
|
} zfs_ioc_namecheck_t;
|
|
|
|
/*
|
|
* IOC Keys are used to document and validate user->kernel interface inputs.
|
|
* See zfs_keys_recv_new for an example declaration. Any key name that is not
|
|
* listed will be rejected as input.
|
|
*
|
|
* The keyname 'optional' is always allowed, and must be an nvlist if present.
|
|
* Arguments which older kernels can safely ignore can be placed under the
|
|
* "optional" key.
|
|
*
|
|
* When adding new keys to an existing ioc for new functionality, consider:
|
|
* - adding an entry into zfs_sysfs.c zfs_features[] list
|
|
* - updating the libzfs_input_check.c test utility
|
|
*
|
|
* Note: in the ZK_WILDCARDLIST case, the name serves as documentation
|
|
* for the expected name (bookmark, snapshot, property, etc) but there
|
|
* is no validation in the preflight zfs_check_input_nvpairs() check.
|
|
*/
|
|
typedef enum {
|
|
ZK_OPTIONAL = 1 << 0, /* pair is optional */
|
|
ZK_WILDCARDLIST = 1 << 1, /* one or more unspecified key names */
|
|
} ioc_key_flag_t;
|
|
|
|
typedef struct zfs_ioc_key {
|
|
const char *zkey_name;
|
|
data_type_t zkey_type;
|
|
ioc_key_flag_t zkey_flags;
|
|
} zfs_ioc_key_t;
|
|
|
|
int zfs_secpolicy_config(zfs_cmd_t *, nvlist_t *, cred_t *);
|
|
|
|
void zfs_ioctl_register_dataset_nolog(zfs_ioc_t, zfs_ioc_legacy_func_t *,
|
|
zfs_secpolicy_func_t *, zfs_ioc_poolcheck_t);
|
|
|
|
void zfs_ioctl_register(const char *, zfs_ioc_t, zfs_ioc_func_t *,
|
|
zfs_secpolicy_func_t *, zfs_ioc_namecheck_t, zfs_ioc_poolcheck_t,
|
|
boolean_t, boolean_t, const zfs_ioc_key_t *, size_t);
|
|
|
|
uint64_t zfs_max_nvlist_src_size_os(void);
|
|
void zfs_ioctl_init_os(void);
|
|
|
|
boolean_t zfs_vfs_held(zfsvfs_t *);
|
|
int zfs_vfs_ref(zfsvfs_t **);
|
|
void zfs_vfs_rele(zfsvfs_t *);
|
|
|
|
long zfsdev_ioctl_common(uint_t, zfs_cmd_t *, int);
|
|
int zfsdev_attach(void);
|
|
void zfsdev_detach(void);
|
|
int zfs_kmod_init(void);
|
|
void zfs_kmod_fini(void);
|
|
|
|
#endif
|