From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
To: linux-nfs@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Emanuele Giuseppe Esposito <eesposit@redhat.com>,
Jeremy Kerr <jk@ozlabs.org>, Arnd Bergmann <arnd@arndb.de>,
Michael Ellerman <mpe@ellerman.id.au>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Dennis Dalessandro <dennis.dalessandro@intel.com>,
Mike Marciniszyn <mike.marciniszyn@intel.com>,
Doug Ledford <dledford@redhat.com>,
Jason Gunthorpe <jgg@ziepe.ca>,
Frederic Barrat <fbarrat@linux.ibm.com>,
Andrew Donnellan <ajd@linux.ibm.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Robert Richter <rric@kernel.org>,
"Manoj N. Kumar" <manoj@linux.ibm.com>,
"Matthew R. Ochs" <mrochs@linux.ibm.com>,
Uma Krishnan <ukrishn@linux.ibm.com>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Felipe Balbi <balbi@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Ian Kent <raven@themaw.net>, Joel Becker <jlbec@evilplan.org>,
Christoph Hellwig <hch@lst.de>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Matthew Garrett <matthew.garrett@nebula.com>,
Ard Biesheuvel <ardb@kernel.org>,
Miklos Szeredi <miklos@szeredi.hu>,
Mike Kravetz <mike.kravetz@oracle.com>,
Mark Fasheh <mark@fasheh.com>,
Joseph Qi <joseph.qi@linux.alibaba.com>,
Alexey Dobriyan <adobriyan@gmail.com>,
Luis Chamberlain <mcgrof@kernel.org>,
Kees Cook <keescook@chromium.org>,
Iurii Zaikin <yzaikin@google.com>,
Anton Vorontsov <anton@enomsg.org>,
Colin Cross <ccross@android.com>, Tony Luck <tony.luck@intel.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>, Andrii Nakryiko <andriin@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@chromium.org>, Hugh Dickins <hughd@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
"J. Bruce Fields" <bfields@fieldses.org>,
Chuck Lever <chuck.lever@oracle.com>,
Trond Myklebust <trond.myklebust@hammerspace.com>,
Anna Schumaker <anna.schumaker@netapp.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
James Morris <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
John Johansen <john.johansen@canonical.com>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
linux-s390@vger.kernel.org, dri-devel@lists.freedesktop.org,
linux-rdma@vger.kernel.org, oprofile-list@lists.sf.net,
linux-scsi@vger.kernel.org, linux-usb@vger.kernel.org,
linux-fsdevel@vger.kernel.org, autofs@vger.kernel.org,
linux-efi@vger.kernel.org, linux-mm@kvack.org,
ocfs2-devel@oss.oracle.com, netdev@vger.kernel.org,
bpf@vger.kernel.org, linux-security-module@vger.kernel.org
Subject: [PATCH 2/8] fs: extract simple_pin/release_fs to separate files
Date: Tue, 14 Apr 2020 14:42:56 +0200 [thread overview]
Message-ID: <20200414124304.4470-3-eesposit@redhat.com> (raw)
In-Reply-To: <20200414124304.4470-1-eesposit@redhat.com>
We will augment this family of functions with inode management. To avoid
littering include/linux/fs.h and fs/libfs.c, move them to a separate header,
with a Kconfig symbol to enable them.
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
drivers/gpu/drm/Kconfig | 1 +
drivers/gpu/drm/drm_drv.c | 2 +-
drivers/misc/cxl/Kconfig | 1 +
drivers/misc/cxl/api.c | 1 +
drivers/misc/ocxl/Kconfig | 1 +
drivers/scsi/cxlflash/ocxl_hw.c | 1 +
fs/Kconfig | 3 +++
fs/Kconfig.binfmt | 1 +
fs/Makefile | 1 +
fs/binfmt_misc.c | 2 +-
fs/configfs/Kconfig | 1 +
fs/configfs/mount.c | 2 +-
fs/debugfs/inode.c | 2 +-
fs/libfs.c | 36 +------------------------------
fs/simplefs.c | 38 +++++++++++++++++++++++++++++++++
fs/tracefs/inode.c | 2 +-
include/linux/fs.h | 2 --
include/linux/simplefs.h | 10 +++++++++
lib/Kconfig.debug | 16 ++++++++------
security/Kconfig | 1 +
security/apparmor/apparmorfs.c | 3 ++-
security/inode.c | 2 +-
22 files changed, 79 insertions(+), 50 deletions(-)
create mode 100644 fs/simplefs.c
create mode 100644 include/linux/simplefs.h
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 43594978958e..a6fe933de9da 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -14,6 +14,7 @@ menuconfig DRM
select I2C
select I2C_ALGOBIT
select DMA_SHARED_BUFFER
+ select SIMPLEFS
select SYNC_FILE
help
Kernel-level support for the Direct Rendering Infrastructure (DRI)
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 7b1a628d1f6e..187a61091b5c 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -27,7 +27,7 @@
*/
#include <linux/debugfs.h>
-#include <linux/fs.h>
+#include <linux/simplefs.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/mount.h>
diff --git a/drivers/misc/cxl/Kconfig b/drivers/misc/cxl/Kconfig
index 39eec9031487..a62795079d9c 100644
--- a/drivers/misc/cxl/Kconfig
+++ b/drivers/misc/cxl/Kconfig
@@ -19,6 +19,7 @@ config CXL
select CXL_BASE
select CXL_AFU_DRIVER_OPS
select CXL_LIB
+ select SIMPLEFS
default m
help
Select this option to enable driver support for IBM Coherent
diff --git a/drivers/misc/cxl/api.c b/drivers/misc/cxl/api.c
index b493de962153..0b8f8de7475a 100644
--- a/drivers/misc/cxl/api.c
+++ b/drivers/misc/cxl/api.c
@@ -9,6 +9,7 @@
#include <misc/cxl.h>
#include <linux/module.h>
#include <linux/mount.h>
+#include <linux/simplefs.h>
#include <linux/pseudo_fs.h>
#include <linux/sched/mm.h>
#include <linux/mmu_context.h>
diff --git a/drivers/misc/ocxl/Kconfig b/drivers/misc/ocxl/Kconfig
index 2d2266c1439e..ddd9245fff3d 100644
--- a/drivers/misc/ocxl/Kconfig
+++ b/drivers/misc/ocxl/Kconfig
@@ -12,6 +12,7 @@ config OCXL
depends on PPC_POWERNV && PCI && EEH
select OCXL_BASE
select HOTPLUG_PCI_POWERNV
+ select SIMPLEFS
default m
help
Select this option to enable the ocxl driver for Open
diff --git a/drivers/scsi/cxlflash/ocxl_hw.c b/drivers/scsi/cxlflash/ocxl_hw.c
index 7018cd802569..429f55651090 100644
--- a/drivers/scsi/cxlflash/ocxl_hw.c
+++ b/drivers/scsi/cxlflash/ocxl_hw.c
@@ -12,6 +12,7 @@
#include <linux/idr.h>
#include <linux/module.h>
#include <linux/mount.h>
+#include <linux/simplefs.h>
#include <linux/pseudo_fs.h>
#include <linux/poll.h>
#include <linux/sched/signal.h>
diff --git a/fs/Kconfig b/fs/Kconfig
index f08fbbfafd9a..a6795ae312a2 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -218,6 +218,9 @@ config HUGETLB_PAGE
config MEMFD_CREATE
def_bool TMPFS || HUGETLBFS
+config SIMPLEFS
+ bool
+
config ARCH_HAS_GIGANTIC_PAGE
bool
diff --git a/fs/Kconfig.binfmt b/fs/Kconfig.binfmt
index 62dc4f577ba1..af7b765de4d3 100644
--- a/fs/Kconfig.binfmt
+++ b/fs/Kconfig.binfmt
@@ -176,6 +176,7 @@ config BINFMT_EM86
config BINFMT_MISC
tristate "Kernel support for MISC binaries"
+ select SIMPLEFS
---help---
If you say Y here, it will be possible to plug wrapper-driven binary
formats into the kernel. You will like this especially when you use
diff --git a/fs/Makefile b/fs/Makefile
index 2ce5112b02c8..c5c665984b9e 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_PROC_FS) += proc_namespace.o
obj-y += notify/
obj-$(CONFIG_EPOLL) += eventpoll.o
obj-y += anon_inodes.o
+obj-$(CONFIG_SIMPLEFS) += simplefs.o
obj-$(CONFIG_SIGNALFD) += signalfd.o
obj-$(CONFIG_TIMERFD) += timerfd.o
obj-$(CONFIG_EVENTFD) += eventfd.o
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index cdb45829354d..c764110f5f0b 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -25,7 +25,7 @@
#include <linux/mount.h>
#include <linux/fs_context.h>
#include <linux/syscalls.h>
-#include <linux/fs.h>
+#include <linux/simplefs.h>
#include <linux/uaccess.h>
#include "internal.h"
diff --git a/fs/configfs/Kconfig b/fs/configfs/Kconfig
index 272b64456999..3b461e4e3989 100644
--- a/fs/configfs/Kconfig
+++ b/fs/configfs/Kconfig
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
config CONFIGFS_FS
tristate "Userspace-driven configuration filesystem"
+ select SIMPLEFS
select SYSFS
help
configfs is a RAM-based filesystem that provides the converse
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 0c6e8cf61953..331c2f064f02 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -10,7 +10,7 @@
* configfs Copyright (C) 2005 Oracle. All rights reserved.
*/
-#include <linux/fs.h>
+#include <linux/simplefs.h>
#include <linux/module.h>
#include <linux/mount.h>
#include <linux/fs_context.h>
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index b7f2e971ecbc..7b9fddced48f 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -13,7 +13,7 @@
#define pr_fmt(fmt) "debugfs: " fmt
#include <linux/module.h>
-#include <linux/fs.h>
+#include <linux/simplefs.h>
#include <linux/mount.h>
#include <linux/pagemap.h>
#include <linux/init.h>
diff --git a/fs/libfs.c b/fs/libfs.c
index 3759fbacf522..26ec729f7bcd 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -11,6 +11,7 @@
#include <linux/cred.h>
#include <linux/mount.h>
#include <linux/vfs.h>
+#include <linux/simplefs.h>
#include <linux/quotaops.h>
#include <linux/mutex.h>
#include <linux/namei.h>
@@ -663,41 +664,6 @@ int simple_fill_super(struct super_block *s, unsigned long magic,
}
EXPORT_SYMBOL(simple_fill_super);
-static DEFINE_SPINLOCK(pin_fs_lock);
-
-int simple_pin_fs(struct file_system_type *type, struct vfsmount **mount, int *count)
-{
- struct vfsmount *mnt = NULL;
- spin_lock(&pin_fs_lock);
- if (unlikely(!*mount)) {
- spin_unlock(&pin_fs_lock);
- mnt = vfs_kern_mount(type, SB_KERNMOUNT, type->name, NULL);
- if (IS_ERR(mnt))
- return PTR_ERR(mnt);
- spin_lock(&pin_fs_lock);
- if (!*mount)
- *mount = mnt;
- }
- mntget(*mount);
- ++*count;
- spin_unlock(&pin_fs_lock);
- mntput(mnt);
- return 0;
-}
-EXPORT_SYMBOL(simple_pin_fs);
-
-void simple_release_fs(struct vfsmount **mount, int *count)
-{
- struct vfsmount *mnt;
- spin_lock(&pin_fs_lock);
- mnt = *mount;
- if (!--*count)
- *mount = NULL;
- spin_unlock(&pin_fs_lock);
- mntput(mnt);
-}
-EXPORT_SYMBOL(simple_release_fs);
-
/**
* simple_read_from_buffer - copy data from the buffer to user space
* @to: the user space buffer to read to
diff --git a/fs/simplefs.c b/fs/simplefs.c
new file mode 100644
index 000000000000..226d18963801
--- /dev/null
+++ b/fs/simplefs.c
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/simplefs.h>
+#include <linux/mount.h>
+
+static DEFINE_SPINLOCK(pin_fs_lock);
+
+int simple_pin_fs(struct file_system_type *type, struct vfsmount **mount, int *count)
+{
+ struct vfsmount *mnt = NULL;
+ spin_lock(&pin_fs_lock);
+ if (unlikely(!*mount)) {
+ spin_unlock(&pin_fs_lock);
+ mnt = vfs_kern_mount(type, SB_KERNMOUNT, type->name, NULL);
+ if (IS_ERR(mnt))
+ return PTR_ERR(mnt);
+ spin_lock(&pin_fs_lock);
+ if (!*mount)
+ *mount = mnt;
+ }
+ mntget(*mount);
+ ++*count;
+ spin_unlock(&pin_fs_lock);
+ mntput(mnt);
+ return 0;
+}
+EXPORT_SYMBOL(simple_pin_fs);
+
+void simple_release_fs(struct vfsmount **mount, int *count)
+{
+ struct vfsmount *mnt;
+ spin_lock(&pin_fs_lock);
+ mnt = *mount;
+ if (!--*count)
+ *mount = NULL;
+ spin_unlock(&pin_fs_lock);
+ mntput(mnt);
+}
+EXPORT_SYMBOL(simple_release_fs);
diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c
index 0ee8c6dfb036..4353ca81e1d7 100644
--- a/fs/tracefs/inode.c
+++ b/fs/tracefs/inode.c
@@ -10,7 +10,7 @@
*/
#include <linux/module.h>
-#include <linux/fs.h>
+#include <linux/simplefs.h>
#include <linux/mount.h>
#include <linux/kobject.h>
#include <linux/namei.h>
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 4f6f59b4f22a..55b679b89c8a 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3363,8 +3363,6 @@ struct tree_descr { const char *name; const struct file_operations *ops; int mod
struct dentry *d_alloc_name(struct dentry *, const char *);
extern int simple_fill_super(struct super_block *, unsigned long,
const struct tree_descr *);
-extern int simple_pin_fs(struct file_system_type *, struct vfsmount **mount, int *count);
-extern void simple_release_fs(struct vfsmount **mount, int *count);
extern ssize_t simple_read_from_buffer(void __user *to, size_t count,
loff_t *ppos, const void *from, size_t available);
diff --git a/include/linux/simplefs.h b/include/linux/simplefs.h
new file mode 100644
index 000000000000..1076a44db308
--- /dev/null
+++ b/include/linux/simplefs.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_SIMPLEFS_H
+#define _LINUX_SIMPLEFS_H
+
+#include <linux/fs.h>
+
+extern int simple_pin_fs(struct file_system_type *, struct vfsmount **mount, int *count);
+extern void simple_release_fs(struct vfsmount **mount, int *count);
+
+#endif
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index d1398cef3b18..fc38a6f0fc11 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -288,12 +288,16 @@ config STRIP_ASM_SYMS
config READABLE_ASM
bool "Generate readable assembler code"
- depends on DEBUG_KERNEL
- help
- Disable some compiler optimizations that tend to generate human unreadable
- assembler output. This may make the kernel slightly slower, but it helps
- to keep kernel developers who have to stare a lot at assembler listings
- sane.
+ depends on DEBUG_KERNEL
+ help
+ Disable some compiler optimizations that tend to generate human unreadable
+ assembler output. This may make the kernel slightly slower, but it helps
+ to keep kernel developers who have to stare a lot at assembler listings
+ sane.
+
+config DEBUG_FS
+ bool "Debug Filesystem"
+ select SIMPLEFS
config HEADERS_INSTALL
bool "Install uapi headers to usr/include"
diff --git a/security/Kconfig b/security/Kconfig
index cd3cc7da3a55..2c6713aa8b4f 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -39,6 +39,7 @@ config SECURITY_WRITABLE_HOOKS
config SECURITYFS
bool "Enable the securityfs filesystem"
+ select SIMPLEFS
help
This will build the securityfs filesystem. It is currently used by
various security modules (AppArmor, IMA, SafeSetID, TOMOYO, TPM).
diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c
index 828bb1eb77ea..d62d3fca47f2 100644
--- a/security/apparmor/apparmorfs.c
+++ b/security/apparmor/apparmorfs.c
@@ -18,7 +18,7 @@
#include <linux/namei.h>
#include <linux/capability.h>
#include <linux/rcupdate.h>
-#include <linux/fs.h>
+#include <linux/simplefs.h>
#include <linux/fs_context.h>
#include <linux/poll.h>
#include <linux/zlib.h>
@@ -2529,6 +2529,7 @@ static int aa_mk_null_file(struct dentry *parent)
struct vfsmount *mount;
struct dentry *dentry;
struct inode *inode;
+ int error;
mount = vfs_kern_mount(type, SB_KERNMOUNT, type->name, NULL);
if (IS_ERR(mount))
diff --git a/security/inode.c b/security/inode.c
index 6c326939750d..a9a9ee4de21d 100644
--- a/security/inode.c
+++ b/security/inode.c
@@ -12,7 +12,7 @@
/* #define DEBUG */
#include <linux/sysfs.h>
#include <linux/kobject.h>
-#include <linux/fs.h>
+#include <linux/simplefs.h>
#include <linux/fs_context.h>
#include <linux/mount.h>
#include <linux/pagemap.h>
--
2.25.2
next prev parent reply other threads:[~2020-04-14 12:43 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-14 12:42 [PATCH 0/8] Simplefs: group and simplify linux fs code Emanuele Giuseppe Esposito
2020-04-14 12:42 ` [PATCH 1/8] apparmor: just use vfs_kern_mount to make .null Emanuele Giuseppe Esposito
2020-04-16 6:44 ` Luis Chamberlain
2020-04-20 14:00 ` Emanuele Giuseppe Esposito
2020-04-14 12:42 ` Emanuele Giuseppe Esposito [this message]
2020-04-14 12:54 ` [PATCH 2/8] fs: extract simple_pin/release_fs to separate files Greg Kroah-Hartman
2020-04-16 6:52 ` Luis Chamberlain
2020-04-21 11:19 ` Frederic Barrat
2020-04-21 11:26 ` Emanuele Giuseppe Esposito
2020-04-14 12:42 ` [PATCH 3/8] fs: wrap simple_pin_fs/simple_release_fs arguments in a struct Emanuele Giuseppe Esposito
2020-04-14 13:03 ` Greg Kroah-Hartman
2020-04-14 12:42 ` [PATCH 4/8] fs: introduce simple_new_inode Emanuele Giuseppe Esposito
2020-04-14 13:01 ` Greg Kroah-Hartman
2020-04-20 13:58 ` Emanuele Giuseppe Esposito
2020-04-14 12:42 ` [PATCH 5/8] simplefs: add alloc_anon_inode wrapper Emanuele Giuseppe Esposito
2020-04-14 12:55 ` Greg Kroah-Hartman
2020-04-14 12:43 ` [PATCH 6/8] simplefs: add file creation functions Emanuele Giuseppe Esposito
2020-04-14 12:56 ` Greg Kroah-Hartman
2020-04-20 13:57 ` Emanuele Giuseppe Esposito
2020-04-20 14:28 ` Greg Kroah-Hartman
2020-04-20 14:33 ` Paolo Bonzini
2020-04-14 12:43 ` [PATCH 7/8] debugfs: switch to simplefs inode creation API Emanuele Giuseppe Esposito
2020-04-14 12:43 ` [PATCH 8/8] tracefs: " Emanuele Giuseppe Esposito
2020-04-16 6:59 ` [PATCH 0/8] Simplefs: group and simplify linux fs code Luis Chamberlain
2020-04-20 14:01 ` Emanuele Giuseppe Esposito
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