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Linux 5.12 compat: idmapped mounts 

In Linux 5.12, the filesystem API was modified to support ipmapped
mounts by adding a "struct user_namespace *" parameter to a number
functions and VFS handlers. This change adds the needed autoconf
macros to detect the new interfaces and updates the code appropriately.
This change does not add support for idmapped mounts, instead it
preserves the existing behavior by passing the initial user namespace
where needed.  A subsequent commit will be required to add support
for idmapped mounted.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Coleman Kane <ckane@colemankane.org>
Closes #11712
This commit is contained in:
Coleman Kane 2021-03-20 00:00:59 -04:00 committed by GitHub
parent 330c6c0523
commit e2a8296131
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
22 changed files with 557 additions and 123 deletions
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28
config/kernel-generic_fillattr.m4 Normal file
View File

@ -0,0 +1,28 @@
dnl #
dnl # 5.12 API
dnl #
dnl # generic_fillattr in linux/fs.h now requires a struct user_namespace*
dnl # as the first arg, to support idmapped mounts.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_GENERIC_FILLATTR_USERNS], [
ZFS_LINUX_TEST_SRC([generic_fillattr_userns], [
#include <linux/fs.h>
],[
struct user_namespace *userns = NULL;
struct inode *in = NULL;
struct kstat *k = NULL;
generic_fillattr(userns, in, k);
])
])
AC_DEFUN([ZFS_AC_KERNEL_GENERIC_FILLATTR_USERNS], [
AC_MSG_CHECKING([whether generic_fillattr requres struct user_namespace*])
ZFS_LINUX_TEST_RESULT([generic_fillattr_userns], [
AC_MSG_RESULT([yes])
AC_DEFINE(HAVE_GENERIC_FILLATTR_USERNS, 1,
[generic_fillattr requires struct user_namespace*])
],[
AC_MSG_RESULT([no])
])
])

31
config/kernel-inode-create.m4
View File

@ -1,7 +1,25 @@
AC_DEFUN([ZFS_AC_KERNEL_SRC_CREATE], [
dnl #
dnl # 5.12 API change that added the struct user_namespace* arg
dnl # to the front of this function type's arg list.
dnl #
ZFS_LINUX_TEST_SRC([create_userns], [
#include <linux/fs.h>
#include <linux/sched.h>
int inode_create(struct user_namespace *userns,
struct inode *inode ,struct dentry *dentry,
umode_t umode, bool flag) { return 0; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.create = inode_create,
};
],[])
dnl #
dnl # 3.6 API change
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_CREATE_FLAGS], [
ZFS_LINUX_TEST_SRC([create_flags], [
#include <linux/fs.h>
#include <linux/sched.h>
@ -16,7 +34,15 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_CREATE_FLAGS], [
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_CREATE_FLAGS], [
AC_DEFUN([ZFS_AC_KERNEL_CREATE], [
AC_MSG_CHECKING([whether iops->create() takes struct user_namespace*])
ZFS_LINUX_TEST_RESULT([create_userns], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_IOPS_CREATE_USERNS, 1,
[iops->create() takes struct user_namespace*])
],[
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether iops->create() passes flags])
ZFS_LINUX_TEST_RESULT([create_flags], [
AC_MSG_RESULT(yes)
@ -24,3 +50,4 @@ AC_DEFUN([ZFS_AC_KERNEL_CREATE_FLAGS], [
ZFS_LINUX_TEST_ERROR([iops->create()])
])
])
])

41
config/kernel-inode-getattr.m4
View File

@ -1,8 +1,29 @@
AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_GETATTR], [
dnl #
dnl # Linux 5.12 API
dnl # The getattr I/O operations handler type was extended to require
dnl # a struct user_namespace* as its first arg, to support idmapped
dnl # mounts.
dnl #
ZFS_LINUX_TEST_SRC([inode_operations_getattr_userns], [
#include <linux/fs.h>
int test_getattr(
struct user_namespace *userns,
const struct path *p, struct kstat *k,
u32 request_mask, unsigned int query_flags)
{ return 0; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.getattr = test_getattr,
};
],[])
dnl #
dnl # Linux 4.11 API
dnl # See torvalds/linux@a528d35
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_GETATTR], [
ZFS_LINUX_TEST_SRC([inode_operations_getattr_path], [
#include <linux/fs.h>
@ -33,6 +54,20 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_GETATTR], [
])
AC_DEFUN([ZFS_AC_KERNEL_INODE_GETATTR], [
dnl #
dnl # Kernel 5.12 test
dnl #
AC_MSG_CHECKING([whether iops->getattr() takes user_namespace])
ZFS_LINUX_TEST_RESULT([inode_operations_getattr_userns], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_USERNS_IOPS_GETATTR, 1,
[iops->getattr() takes struct user_namespace*])
],[
AC_MSG_RESULT(no)
dnl #
dnl # Kernel 4.11 test
dnl #
AC_MSG_CHECKING([whether iops->getattr() takes a path])
ZFS_LINUX_TEST_RESULT([inode_operations_getattr_path], [
AC_MSG_RESULT(yes)
@ -41,6 +76,9 @@ AC_DEFUN([ZFS_AC_KERNEL_INODE_GETATTR], [
],[
AC_MSG_RESULT(no)
dnl #
dnl # Kernel < 4.11 test
dnl #
AC_MSG_CHECKING([whether iops->getattr() takes a vfsmount])
ZFS_LINUX_TEST_RESULT([inode_operations_getattr_vfsmount], [
AC_MSG_RESULT(yes)
@ -51,3 +89,4 @@ AC_DEFUN([ZFS_AC_KERNEL_INODE_GETATTR], [
])
])
])
])

19
config/kernel-is_owner_or_cap.m4
View File

@ -11,13 +11,32 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_INODE_OWNER_OR_CAPABLE], [
struct inode *ip = NULL;
(void) inode_owner_or_capable(ip);
])
ZFS_LINUX_TEST_SRC([inode_owner_or_capable_idmapped], [
#include <linux/fs.h>
],[
struct inode *ip = NULL;
(void) inode_owner_or_capable(&init_user_ns, ip);
])
])
AC_DEFUN([ZFS_AC_KERNEL_INODE_OWNER_OR_CAPABLE], [
AC_MSG_CHECKING([whether inode_owner_or_capable() exists])
ZFS_LINUX_TEST_RESULT([inode_owner_or_capable], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_INODE_OWNER_OR_CAPABLE, 1,
[inode_owner_or_capable() exists])
], [
AC_MSG_RESULT(no)
AC_MSG_CHECKING(
[whether inode_owner_or_capable() takes user_ns])
ZFS_LINUX_TEST_RESULT([inode_owner_or_capable_idmapped], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_INODE_OWNER_OR_CAPABLE_IDMAPPED, 1,
[inode_owner_or_capable() takes user_ns])
],[
ZFS_LINUX_TEST_ERROR([capability])
])
])
])

32
config/kernel-mkdir-umode-t.m4
View File

@ -1,32 +0,0 @@
dnl #
dnl # 3.3 API change
dnl # The VFS .create, .mkdir and .mknod callbacks were updated to take a
dnl # umode_t type rather than an int. The expectation is that any backport
dnl # would also change all three prototypes. However, if it turns out that
dnl # some distribution doesn't backport the whole thing this could be
dnl # broken apart into three separate checks.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_MKDIR_UMODE_T], [
ZFS_LINUX_TEST_SRC([inode_operations_mkdir], [
#include <linux/fs.h>
int mkdir(struct inode *inode, struct dentry *dentry,
umode_t umode) { return 0; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.mkdir = mkdir,
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_MKDIR_UMODE_T], [
AC_MSG_CHECKING([whether iops->create()/mkdir()/mknod() take umode_t])
ZFS_LINUX_TEST_RESULT([inode_operations_mkdir], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_MKDIR_UMODE_T, 1,
[iops->create()/mkdir()/mknod() take umode_t])
],[
ZFS_LINUX_TEST_ERROR([mkdir()])
])
])

65
config/kernel-mkdir.m4 Normal file
View File

@ -0,0 +1,65 @@
dnl #
dnl # Supported mkdir() interfaces checked newest to oldest.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_MKDIR], [
dnl #
dnl # 5.12 API change
dnl # The struct user_namespace arg was added as the first argument to
dnl # mkdir()
dnl #
ZFS_LINUX_TEST_SRC([mkdir_user_namespace], [
#include <linux/fs.h>
int mkdir(struct user_namespace *userns,
struct inode *inode, struct dentry *dentry,
umode_t umode) { return 0; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.mkdir = mkdir,
};
],[])
dnl #
dnl # 3.3 API change
dnl # The VFS .create, .mkdir and .mknod callbacks were updated to take a
dnl # umode_t type rather than an int. The expectation is that any backport
dnl # would also change all three prototypes. However, if it turns out that
dnl # some distribution doesn't backport the whole thing this could be
dnl # broken apart into three separate checks.
dnl #
ZFS_LINUX_TEST_SRC([inode_operations_mkdir], [
#include <linux/fs.h>
int mkdir(struct inode *inode, struct dentry *dentry,
umode_t umode) { return 0; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.mkdir = mkdir,
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_MKDIR], [
dnl #
dnl # 5.12 API change
dnl # The struct user_namespace arg was added as the first argument to
dnl # mkdir() of the iops structure.
dnl #
AC_MSG_CHECKING([whether iops->mkdir() takes struct user_namespace*])
ZFS_LINUX_TEST_RESULT([mkdir_user_namespace], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_IOPS_MKDIR_USERNS, 1,
[iops->mkdir() takes struct user_namespace*])
],[
AC_MSG_CHECKING([whether iops->mkdir() takes umode_t])
ZFS_LINUX_TEST_RESULT([inode_operations_mkdir], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_MKDIR_UMODE_T, 1,
[iops->mkdir() takes umode_t])
],[
ZFS_LINUX_TEST_ERROR([mkdir()])
])
])
])

30
config/kernel-mknod.m4 Normal file
View File

@ -0,0 +1,30 @@
AC_DEFUN([ZFS_AC_KERNEL_SRC_MKNOD], [
dnl #
dnl # 5.12 API change that added the struct user_namespace* arg
dnl # to the front of this function type's arg list.
dnl #
ZFS_LINUX_TEST_SRC([mknod_userns], [
#include <linux/fs.h>
#include <linux/sched.h>
int tmp_mknod(struct user_namespace *userns,
struct inode *inode ,struct dentry *dentry,
umode_t u, dev_t d) { return 0; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.mknod = tmp_mknod,
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_MKNOD], [
AC_MSG_CHECKING([whether iops->mknod() takes struct user_namespace*])
ZFS_LINUX_TEST_RESULT([mknod_userns], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_IOPS_MKNOD_USERNS, 1,
[iops->mknod() takes struct user_namespace*])
],[
AC_MSG_RESULT(no)
])
])

36
config/kernel-rename.m4
View File

@ -1,10 +1,10 @@
AC_DEFUN([ZFS_AC_KERNEL_SRC_RENAME], [
dnl #
dnl # 4.9 API change,
dnl # iops->rename2() merged into iops->rename(), and iops->rename() now wants
dnl # flags.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_RENAME_WANTS_FLAGS], [
ZFS_LINUX_TEST_SRC([inode_operations_rename], [
ZFS_LINUX_TEST_SRC([inode_operations_rename_flags], [
#include <linux/fs.h>
int rename_fn(struct inode *sip, struct dentry *sdp,
struct inode *tip, struct dentry *tdp,
@ -15,11 +15,36 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_RENAME_WANTS_FLAGS], [
.rename = rename_fn,
};
],[])
dnl #
dnl # 5.12 API change,
dnl #
dnl # Linux 5.12 introduced passing struct user_namespace* as the first argument
dnl # of the rename() and other inode_operations members.
dnl #
ZFS_LINUX_TEST_SRC([inode_operations_rename_userns], [
#include <linux/fs.h>
int rename_fn(struct user_namespace *user_ns, struct inode *sip,
struct dentry *sdp, struct inode *tip, struct dentry *tdp,
unsigned int flags) { return 0; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.rename = rename_fn,
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_RENAME_WANTS_FLAGS], [
AC_MSG_CHECKING([whether iops->rename() wants flags])
ZFS_LINUX_TEST_RESULT([inode_operations_rename], [
AC_DEFUN([ZFS_AC_KERNEL_RENAME], [
AC_MSG_CHECKING([whether iops->rename() takes struct user_namespace*])
ZFS_LINUX_TEST_RESULT([inode_operations_rename_userns], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_IOPS_RENAME_USERNS, 1,
[iops->rename() takes struct user_namespace*])
],[
AC_MSG_RESULT(no)
ZFS_LINUX_TEST_RESULT([inode_operations_rename_flags], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_RENAME_WANTS_FLAGS, 1,
[iops->rename() wants flags])
@ -27,3 +52,4 @@ AC_DEFUN([ZFS_AC_KERNEL_RENAME_WANTS_FLAGS], [
AC_MSG_RESULT(no)
])
])
])

33
config/kernel-setattr-prepare.m4
View File

@ -1,9 +1,9 @@
AC_DEFUN([ZFS_AC_KERNEL_SRC_SETATTR_PREPARE], [
dnl #
dnl # 4.9 API change
dnl # The inode_change_ok() function has been renamed setattr_prepare()
dnl # and updated to take a dentry rather than an inode.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_SETATTR_PREPARE], [
ZFS_LINUX_TEST_SRC([setattr_prepare], [
#include <linux/fs.h>
], [
@ -12,16 +12,41 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_SETATTR_PREPARE], [
int error __attribute__ ((unused)) =
setattr_prepare(dentry, attr);
])
dnl #
dnl # 5.12 API change
dnl # The setattr_prepare() function has been changed to accept a new argument
dnl # for struct user_namespace*
dnl #
ZFS_LINUX_TEST_SRC([setattr_prepare_userns], [
#include <linux/fs.h>
], [
struct dentry *dentry = NULL;
struct iattr *attr = NULL;
struct user_namespace *userns = NULL;
int error __attribute__ ((unused)) =
setattr_prepare(userns, dentry, attr);
])
])
AC_DEFUN([ZFS_AC_KERNEL_SETATTR_PREPARE], [
AC_MSG_CHECKING([whether setattr_prepare() is available])
AC_MSG_CHECKING([whether setattr_prepare() is available and accepts struct user_namespace*])
ZFS_LINUX_TEST_RESULT_SYMBOL([setattr_prepare_userns],
[setattr_prepare], [fs/attr.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SETATTR_PREPARE_USERNS, 1,
[setattr_prepare() accepts user_namespace])
], [
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether setattr_prepare() is available, doesn't accept user_namespace])
ZFS_LINUX_TEST_RESULT_SYMBOL([setattr_prepare],
[setattr_prepare], [fs/attr.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SETATTR_PREPARE, 1,
[setattr_prepare() is available])
AC_DEFINE(HAVE_SETATTR_PREPARE_NO_USERNS, 1,
[setattr_prepare() is available, doesn't accept user_namespace])
], [
AC_MSG_RESULT(no)
])
])
])

30
config/kernel-symlink.m4 Normal file
View File

@ -0,0 +1,30 @@
AC_DEFUN([ZFS_AC_KERNEL_SRC_SYMLINK], [
dnl #
dnl # 5.12 API change that added the struct user_namespace* arg
dnl # to the front of this function type's arg list.
dnl #
ZFS_LINUX_TEST_SRC([symlink_userns], [
#include <linux/fs.h>
#include <linux/sched.h>
int tmp_symlink(struct user_namespace *userns,
struct inode *inode ,struct dentry *dentry,
const char *path) { return 0; }
static const struct inode_operations
iops __attribute__ ((unused)) = {
.symlink = tmp_symlink,
};
],[])
])
AC_DEFUN([ZFS_AC_KERNEL_SYMLINK], [
AC_MSG_CHECKING([whether iops->symlink() takes struct user_namespace*])
ZFS_LINUX_TEST_RESULT([symlink_userns], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_IOPS_SYMLINK_USERNS, 1,
[iops->symlink() takes struct user_namespace*])
],[
AC_MSG_RESULT(no)
])
])

28
config/kernel-xattr-handler.m4
View File

@ -152,6 +152,21 @@ dnl #
dnl # Supported xattr handler set() interfaces checked newest to oldest.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_XATTR_HANDLER_SET], [
ZFS_LINUX_TEST_SRC([xattr_handler_set_userns], [
#include <linux/xattr.h>
int set(const struct xattr_handler *handler,
struct user_namespace *mnt_userns,
struct dentry *dentry, struct inode *inode,
const char *name, const void *buffer,
size_t size, int flags)
{ return 0; }
static const struct xattr_handler
xops __attribute__ ((unused)) = {
.set = set,
};
],[])
ZFS_LINUX_TEST_SRC([xattr_handler_set_dentry_inode], [
#include <linux/xattr.h>
@ -193,11 +208,23 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_XATTR_HANDLER_SET], [
])
AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_SET], [
dnl #
dnl # 5.12 API change,
dnl # The xattr_handler->set() callback was changed to 8 arguments, and
dnl # struct user_namespace* was inserted as arg #2
dnl #
AC_MSG_CHECKING([whether xattr_handler->set() wants dentry, inode, and user_namespace])
ZFS_LINUX_TEST_RESULT([xattr_handler_set_userns], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_XATTR_SET_USERNS, 1,
[xattr_handler->set() takes user_namespace])
],[
dnl #
dnl # 4.7 API change,
dnl # The xattr_handler->set() callback was changed to take both
dnl # dentry and inode.
dnl #
AC_MSG_RESULT(no)
AC_MSG_CHECKING([whether xattr_handler->set() wants dentry and inode])
ZFS_LINUX_TEST_RESULT([xattr_handler_set_dentry_inode], [
AC_MSG_RESULT(yes)
@ -237,6 +264,7 @@ AC_DEFUN([ZFS_AC_KERNEL_XATTR_HANDLER_SET], [
])
])
])
])
dnl #
dnl # Supported xattr handler list() interfaces checked newest to oldest.

18
config/kernel.m4
View File

@ -79,9 +79,9 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
ZFS_AC_KERNEL_SRC_EVICT_INODE
ZFS_AC_KERNEL_SRC_DIRTY_INODE
ZFS_AC_KERNEL_SRC_SHRINKER
ZFS_AC_KERNEL_SRC_MKDIR_UMODE_T
ZFS_AC_KERNEL_SRC_MKDIR
ZFS_AC_KERNEL_SRC_LOOKUP_FLAGS
ZFS_AC_KERNEL_SRC_CREATE_FLAGS
ZFS_AC_KERNEL_SRC_CREATE
ZFS_AC_KERNEL_SRC_GET_LINK
ZFS_AC_KERNEL_SRC_PUT_LINK
ZFS_AC_KERNEL_SRC_TMPFILE
@ -115,7 +115,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
ZFS_AC_KERNEL_SRC_KUIDGID_T
ZFS_AC_KERNEL_SRC_KUID_HELPERS
ZFS_AC_KERNEL_SRC_MODULE_PARAM_CALL_CONST
ZFS_AC_KERNEL_SRC_RENAME_WANTS_FLAGS
ZFS_AC_KERNEL_SRC_RENAME
ZFS_AC_KERNEL_SRC_CURRENT_TIME
ZFS_AC_KERNEL_SRC_USERNS_CAPABILITIES
ZFS_AC_KERNEL_SRC_IN_COMPAT_SYSCALL
@ -125,6 +125,9 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
ZFS_AC_KERNEL_SRC_KSTRTOUL
ZFS_AC_KERNEL_SRC_PERCPU
ZFS_AC_KERNEL_SRC_CPU_HOTPLUG
ZFS_AC_KERNEL_SRC_GENERIC_FILLATTR_USERNS
ZFS_AC_KERNEL_SRC_MKNOD
ZFS_AC_KERNEL_SRC_SYMLINK
AC_MSG_CHECKING([for available kernel interfaces])
ZFS_LINUX_TEST_COMPILE_ALL([kabi])
@ -177,9 +180,9 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
ZFS_AC_KERNEL_EVICT_INODE
ZFS_AC_KERNEL_DIRTY_INODE
ZFS_AC_KERNEL_SHRINKER
ZFS_AC_KERNEL_MKDIR_UMODE_T
ZFS_AC_KERNEL_MKDIR
ZFS_AC_KERNEL_LOOKUP_FLAGS
ZFS_AC_KERNEL_CREATE_FLAGS
ZFS_AC_KERNEL_CREATE
ZFS_AC_KERNEL_GET_LINK
ZFS_AC_KERNEL_PUT_LINK
ZFS_AC_KERNEL_TMPFILE
@ -213,7 +216,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
ZFS_AC_KERNEL_KUIDGID_T
ZFS_AC_KERNEL_KUID_HELPERS
ZFS_AC_KERNEL_MODULE_PARAM_CALL_CONST
ZFS_AC_KERNEL_RENAME_WANTS_FLAGS
ZFS_AC_KERNEL_RENAME
ZFS_AC_KERNEL_CURRENT_TIME
ZFS_AC_KERNEL_USERNS_CAPABILITIES
ZFS_AC_KERNEL_IN_COMPAT_SYSCALL
@ -223,6 +226,9 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
ZFS_AC_KERNEL_KSTRTOUL
ZFS_AC_KERNEL_PERCPU
ZFS_AC_KERNEL_CPU_HOTPLUG
ZFS_AC_KERNEL_GENERIC_FILLATTR_USERNS
ZFS_AC_KERNEL_MKNOD
ZFS_AC_KERNEL_SYMLINK
])
dnl #

24
include/os/linux/kernel/linux/vfs_compat.h
View File

@ -343,7 +343,8 @@ static inline void zfs_gid_write(struct inode *ip, gid_t gid)
/*
* 4.9 API change
*/
#ifndef HAVE_SETATTR_PREPARE
#if !(defined(HAVE_SETATTR_PREPARE_NO_USERNS) || \
defined(HAVE_SETATTR_PREPARE_USERNS))
static inline int
setattr_prepare(struct dentry *dentry, struct iattr *ia)
{
@ -389,6 +390,15 @@ func(const struct path *path, struct kstat *stat, u32 request_mask, \
{ \
return (func##_impl(path, stat, request_mask, query_flags)); \
}
#elif defined(HAVE_USERNS_IOPS_GETATTR)
#define ZPL_GETATTR_WRAPPER(func) \
static int \
func(struct user_namespace *user_ns, const struct path *path, \
struct kstat *stat, u32 request_mask, unsigned int query_flags) \
{ \
return (func##_impl(user_ns, path, stat, request_mask, \
query_flags)); \
}
#else
#error
#endif
@ -436,4 +446,16 @@ zpl_is_32bit_api(void)
#endif
}
/*
* 5.12 API change
* To support id-mapped mounts, generic_fillattr() was modified to
* accept a new struct user_namespace* as its first arg.
*/
#ifdef HAVE_GENERIC_FILLATTR_USERNS
#define zpl_generic_fillattr(user_ns, ip, sp) \
generic_fillattr(user_ns, ip, sp)
#else
#define zpl_generic_fillattr(user_ns, ip, sp) generic_fillattr(ip, sp)
#endif
#endif /* _ZFS_VFS_H */

17
include/os/linux/kernel/linux/xattr_compat.h
View File

@ -119,12 +119,27 @@ fn(struct dentry *dentry, const char *name, void *buffer, size_t size, \
#error "Unsupported kernel"
#endif
/*
* 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.
*/
#if 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(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.
*/
#if defined(HAVE_XATTR_SET_DENTRY_INODE)
#elif defined(HAVE_XATTR_SET_DENTRY_INODE)
#define ZPL_XATTR_SET_WRAPPER(fn) \
static int \
fn(const struct xattr_handler *handler, struct dentry *dentry, \

3
include/os/linux/zfs/sys/zfs_vnops_os.h
View File

@ -54,7 +54,8 @@ extern int zfs_mkdir(znode_t *dzp, char *dirname, vattr_t *vap,
extern int zfs_rmdir(znode_t *dzp, char *name, znode_t *cwd,
cred_t *cr, int flags);
extern int zfs_readdir(struct inode *ip, zpl_dir_context_t *ctx, cred_t *cr);
extern int zfs_getattr_fast(struct inode *ip, struct kstat *sp);
extern int zfs_getattr_fast(struct user_namespace *, struct inode *ip,
struct kstat *sp);
extern int zfs_setattr(znode_t *zp, vattr_t *vap, int flag, cred_t *cr);
extern int zfs_rename(znode_t *sdzp, char *snm, znode_t *tdzp,
char *tnm, cred_t *cr, int flags);

18
include/os/linux/zfs/sys/zpl.h
View File

@ -171,4 +171,22 @@ zpl_dir_emit_dots(struct file *file, zpl_dir_context_t *ctx)
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_IDMAPPED)
#define zpl_inode_owner_or_capable(ns, ip) inode_owner_or_capable(ns, ip)
#else
#error "Unsupported kernel"
#endif
#ifdef HAVE_SETATTR_PREPARE_USERNS
#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
#endif /* _SYS_ZPL_H */

2
module/os/linux/zfs/policy.c
View File

@ -124,7 +124,7 @@ secpolicy_vnode_any_access(const cred_t *cr, struct inode *ip, uid_t owner)
if (crgetfsuid(cr) == owner)
return (0);
if (inode_owner_or_capable(ip))
if (zpl_inode_owner_or_capable(kcred->user_ns, ip))
return (0);
#if defined(CONFIG_USER_NS)

5
module/os/linux/zfs/zfs_vnops_os.c
View File

@ -1656,7 +1656,8 @@ out:
*/
/* ARGSUSED */
int
zfs_getattr_fast(struct inode *ip, struct kstat *sp)
zfs_getattr_fast(struct user_namespace *user_ns, struct inode *ip,
struct kstat *sp)
{
znode_t *zp = ITOZ(ip);
zfsvfs_t *zfsvfs = ITOZSB(ip);
@ -1668,7 +1669,7 @@ zfs_getattr_fast(struct inode *ip, struct kstat *sp)
mutex_enter(&zp->z_lock);
generic_fillattr(ip, sp);
zpl_generic_fillattr(user_ns, ip, sp);
/*
* +1 link count for root inode with visible '.zfs' directory.
*/

51
module/os/linux/zfs/zpl_ctldir.c
View File

@ -101,12 +101,22 @@ zpl_root_readdir(struct file *filp, void *dirent, filldir_t filldir)
*/
/* ARGSUSED */
static int
#ifdef HAVE_USERNS_IOPS_GETATTR
zpl_root_getattr_impl(struct user_namespace *user_ns,
const struct path *path, struct kstat *stat, u32 request_mask,
unsigned int query_flags)
#else
zpl_root_getattr_impl(const struct path *path, struct kstat *stat,
u32 request_mask, unsigned int query_flags)
#endif
{
struct inode *ip = path->dentry->d_inode;
#if defined(HAVE_GENERIC_FILLATTR_USERNS) && defined(HAVE_USERNS_IOPS_GETATTR)
generic_fillattr(user_ns, ip, stat);
#else
generic_fillattr(ip, stat);
#endif
stat->atime = current_time(ip);
return (0);
@ -290,8 +300,14 @@ zpl_snapdir_readdir(struct file *filp, void *dirent, filldir_t filldir)
#endif /* !HAVE_VFS_ITERATE && !HAVE_VFS_ITERATE_SHARED */
static int
#ifdef HAVE_IOPS_RENAME_USERNS
zpl_snapdir_rename2(struct user_namespace *user_ns, struct inode *sdip,
struct dentry *sdentry, struct inode *tdip, struct dentry *tdentry,
unsigned int flags)
#else
zpl_snapdir_rename2(struct inode *sdip, struct dentry *sdentry,
struct inode *tdip, struct dentry *tdentry, unsigned int flags)
#endif
{
cred_t *cr = CRED();
int error;
@ -309,7 +325,7 @@ zpl_snapdir_rename2(struct inode *sdip, struct dentry *sdentry,
return (error);
}
#ifndef HAVE_RENAME_WANTS_FLAGS
#if !defined(HAVE_RENAME_WANTS_FLAGS) && !defined(HAVE_IOPS_RENAME_USERNS)
static int
zpl_snapdir_rename(struct inode *sdip, struct dentry *sdentry,
struct inode *tdip, struct dentry *tdentry)
@ -333,7 +349,12 @@ zpl_snapdir_rmdir(struct inode *dip, struct dentry *dentry)
}
static int
#ifdef HAVE_IOPS_MKDIR_USERNS
zpl_snapdir_mkdir(struct user_namespace *user_ns, struct inode *dip,
struct dentry *dentry, umode_t mode)
#else
zpl_snapdir_mkdir(struct inode *dip, struct dentry *dentry, umode_t mode)
#endif
{
cred_t *cr = CRED();
vattr_t *vap;
@ -363,14 +384,24 @@ zpl_snapdir_mkdir(struct inode *dip, struct dentry *dentry, umode_t mode)
*/
/* ARGSUSED */
static int
#ifdef HAVE_USERNS_IOPS_GETATTR
zpl_snapdir_getattr_impl(struct user_namespace *user_ns,
const struct path *path, struct kstat *stat, u32 request_mask,
unsigned int query_flags)
#else
zpl_snapdir_getattr_impl(const struct path *path, struct kstat *stat,
u32 request_mask, unsigned int query_flags)
#endif
{
struct inode *ip = path->dentry->d_inode;
zfsvfs_t *zfsvfs = ITOZSB(ip);
ZPL_ENTER(zfsvfs);
#if defined(HAVE_GENERIC_FILLATTR_USERNS) && defined(HAVE_USERNS_IOPS_GETATTR)
generic_fillattr(user_ns, ip, stat);
#else
generic_fillattr(ip, stat);
#endif
stat->nlink = stat->size = 2;
stat->ctime = stat->mtime = dmu_objset_snap_cmtime(zfsvfs->z_os);
@ -408,7 +439,7 @@ const struct file_operations zpl_fops_snapdir = {
const struct inode_operations zpl_ops_snapdir = {
.lookup = zpl_snapdir_lookup,
.getattr = zpl_snapdir_getattr,
#ifdef HAVE_RENAME_WANTS_FLAGS
#if defined(HAVE_RENAME_WANTS_FLAGS) || defined(HAVE_IOPS_RENAME_USERNS)
.rename = zpl_snapdir_rename2,
#else
.rename = zpl_snapdir_rename,
@ -495,8 +526,14 @@ zpl_shares_readdir(struct file *filp, void *dirent, filldir_t filldir)
/* ARGSUSED */
static int
#ifdef HAVE_USERNS_IOPS_GETATTR
zpl_shares_getattr_impl(struct user_namespace *user_ns,
const struct path *path, struct kstat *stat, u32 request_mask,
unsigned int query_flags)
#else
zpl_shares_getattr_impl(const struct path *path, struct kstat *stat,
u32 request_mask, unsigned int query_flags)
#endif
{
struct inode *ip = path->dentry->d_inode;
zfsvfs_t *zfsvfs = ITOZSB(ip);
@ -506,7 +543,11 @@ zpl_shares_getattr_impl(const struct path *path, struct kstat *stat,
ZPL_ENTER(zfsvfs);
if (zfsvfs->z_shares_dir == 0) {
#if defined(HAVE_GENERIC_FILLATTR_USERNS) && defined(HAVE_USERNS_IOPS_GETATTR)
generic_fillattr(user_ns, path->dentry->d_inode, stat);
#else
generic_fillattr(path->dentry->d_inode, stat);
#endif
stat->nlink = stat->size = 2;
stat->atime = current_time(ip);
ZPL_EXIT(zfsvfs);
@ -515,7 +556,11 @@ zpl_shares_getattr_impl(const struct path *path, struct kstat *stat,
error = -zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp);
if (error == 0) {
error = -zfs_getattr_fast(ZTOI(dzp), stat);
#if defined(HAVE_GENERIC_FILLATTR_USERNS) && defined(HAVE_USERNS_IOPS_GETATTR)
error = -zfs_getattr_fast(user_ns, ZTOI(dzp), stat);
#else
error = -zfs_getattr_fast(kcred->user_ns, ZTOI(dzp), stat);
#endif
iput(ZTOI(dzp));
}

2
module/os/linux/zfs/zpl_file.c
View File

@ -869,7 +869,7 @@ __zpl_ioctl_setflags(struct inode *ip, uint32_t ioctl_flags, xvattr_t *xva)
!capable(CAP_LINUX_IMMUTABLE))
return (-EACCES);
if (!inode_owner_or_capable(ip))
if (!zpl_inode_owner_or_capable(kcred->user_ns, ip))
return (-EACCES);
xva_init(xva);

49
module/os/linux/zfs/zpl_inode.c
View File

@ -128,7 +128,12 @@ zpl_vap_init(vattr_t *vap, struct inode *dir, umode_t mode, cred_t *cr)
}
static int
#ifdef HAVE_IOPS_CREATE_USERNS
zpl_create(struct user_namespace *user_ns, struct inode *dir,
struct dentry *dentry, umode_t mode, bool flag)
#else
zpl_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool flag)
#endif
{
cred_t *cr = CRED();
znode_t *zp;
@ -163,7 +168,12 @@ zpl_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool flag)
}
static int
#ifdef HAVE_IOPS_MKNOD_USERNS
zpl_mknod(struct user_namespace *user_ns, struct inode *dir,
struct dentry *dentry, umode_t mode,
#else
zpl_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
#endif
dev_t rdev)
{
cred_t *cr = CRED();
@ -278,7 +288,12 @@ zpl_unlink(struct inode *dir, struct dentry *dentry)
}
static int
#ifdef HAVE_IOPS_MKDIR_USERNS
zpl_mkdir(struct user_namespace *user_ns, struct inode *dir,
struct dentry *dentry, umode_t mode)
#else
zpl_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
#endif
{
cred_t *cr = CRED();
vattr_t *vap;
@ -338,8 +353,14 @@ zpl_rmdir(struct inode *dir, struct dentry *dentry)
}
static int
#ifdef HAVE_USERNS_IOPS_GETATTR
zpl_getattr_impl(struct user_namespace *user_ns,
const struct path *path, struct kstat *stat, u32 request_mask,
unsigned int query_flags)
#else
zpl_getattr_impl(const struct path *path, struct kstat *stat, u32 request_mask,
unsigned int query_flags)
#endif
{
int error;
fstrans_cookie_t cookie;
@ -350,7 +371,11 @@ zpl_getattr_impl(const struct path *path, struct kstat *stat, u32 request_mask,
* XXX request_mask and query_flags currently ignored.
*/
error = -zfs_getattr_fast(path->dentry->d_inode, stat);
#ifdef HAVE_USERNS_IOPS_GETATTR
error = -zfs_getattr_fast(user_ns, path->dentry->d_inode, stat);
#else
error = -zfs_getattr_fast(kcred->user_ns, path->dentry->d_inode, stat);
#endif
spl_fstrans_unmark(cookie);
ASSERT3S(error, <=, 0);
@ -359,7 +384,12 @@ zpl_getattr_impl(const struct path *path, struct kstat *stat, u32 request_mask,
ZPL_GETATTR_WRAPPER(zpl_getattr);
static int
#ifdef HAVE_SETATTR_PREPARE_USERNS
zpl_setattr(struct user_namespace *user_ns, struct dentry *dentry,
struct iattr *ia)
#else
zpl_setattr(struct dentry *dentry, struct iattr *ia)
#endif
{
struct inode *ip = dentry->d_inode;
cred_t *cr = CRED();
@ -367,7 +397,7 @@ zpl_setattr(struct dentry *dentry, struct iattr *ia)
int error;
fstrans_cookie_t cookie;
error = setattr_prepare(dentry, ia);
error = zpl_setattr_prepare(kcred->user_ns, dentry, ia);
if (error)
return (error);
@ -399,8 +429,14 @@ zpl_setattr(struct dentry *dentry, struct iattr *ia)
}
static int
#ifdef HAVE_IOPS_RENAME_USERNS
zpl_rename2(struct user_namespace *user_ns, struct inode *sdip,
struct dentry *sdentry, struct inode *tdip, struct dentry *tdentry,
unsigned int flags)
#else
zpl_rename2(struct inode *sdip, struct dentry *sdentry,
struct inode *tdip, struct dentry *tdentry, unsigned int flags)
#endif
{
cred_t *cr = CRED();
int error;
@ -421,7 +457,7 @@ zpl_rename2(struct inode *sdip, struct dentry *sdentry,
return (error);
}
#ifndef HAVE_RENAME_WANTS_FLAGS
#if !defined(HAVE_RENAME_WANTS_FLAGS) && !defined(HAVE_IOPS_RENAME_USERNS)
static int
zpl_rename(struct inode *sdip, struct dentry *sdentry,
struct inode *tdip, struct dentry *tdentry)
@ -431,7 +467,12 @@ zpl_rename(struct inode *sdip, struct dentry *sdentry,
#endif
static int
#ifdef HAVE_IOPS_SYMLINK_USERNS
zpl_symlink(struct user_namespace *user_ns, struct inode *dir,
struct dentry *dentry, const char *name)
#else
zpl_symlink(struct inode *dir, struct dentry *dentry, const char *name)
#endif
{
cred_t *cr = CRED();
vattr_t *vap;
@ -678,7 +719,7 @@ const struct inode_operations zpl_dir_inode_operations = {
.mkdir = zpl_mkdir,
.rmdir = zpl_rmdir,
.mknod = zpl_mknod,
#ifdef HAVE_RENAME_WANTS_FLAGS
#if defined(HAVE_RENAME_WANTS_FLAGS) || defined(HAVE_IOPS_RENAME_USERNS)
.rename = zpl_rename2,
#else
.rename = zpl_rename,

4
module/os/linux/zfs/zpl_xattr.c
View File

@ -1233,7 +1233,7 @@ __zpl_xattr_acl_set_access(struct inode *ip, const char *name,
if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIX)
return (-EOPNOTSUPP);
if (!inode_owner_or_capable(ip))
if (!zpl_inode_owner_or_capable(kcred->user_ns, ip))
return (-EPERM);
if (value) {
@ -1273,7 +1273,7 @@ __zpl_xattr_acl_set_default(struct inode *ip, const char *name,
if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIX)
return (-EOPNOTSUPP);
if (!inode_owner_or_capable(ip))
if (!zpl_inode_owner_or_capable(kcred->user_ns, ip))
return (-EPERM);
if (value) {