From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: agruen@kernel.org, bfields@fieldses.org,
akpm@linux-foundation.org, viro@zeniv.linux.org.uk,
dhowells@redhat.com
Cc: aneesh.kumar@linux.vnet.ibm.com, linux-fsdevel@vger.kernel.org,
linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH -V7 22/26] vfs: Cache richacl in struct inode
Date: Tue, 18 Oct 2011 21:02:57 +0530 [thread overview]
Message-ID: <1318951981-5508-23-git-send-email-aneesh.kumar@linux.vnet.ibm.com> (raw)
In-Reply-To: <1318951981-5508-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
From: Andreas Gruenbacher <agruen@kernel.org>
Cache richacls in struct inode so that this doesn't have to be done
individually in each filesystem.
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruen@kernel.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
fs/inode.c | 25 +++++++++++++++++----
include/linux/fs.h | 12 ++++++++-
include/linux/richacl.h | 53 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 83 insertions(+), 7 deletions(-)
diff --git a/fs/inode.c b/fs/inode.c
index ec79246..1b442cf 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -26,6 +26,7 @@
#include <linux/ima.h>
#include <linux/cred.h>
#include <linux/buffer_head.h> /* for inode_has_buffers */
+#include <linux/richacl.h>
#include "internal.h"
/*
@@ -192,7 +193,12 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
inode->i_private = NULL;
inode->i_mapping = mapping;
#ifdef CONFIG_FS_POSIX_ACL
- inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
+ if (IS_POSIXACL(inode))
+ inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
+#endif
+#ifdef CONFIG_FS_RICHACL
+ if (IS_RICHACL(inode))
+ inode->i_richacl = ACL_NOT_CACHED;
#endif
#ifdef CONFIG_FSNOTIFY
@@ -242,10 +248,19 @@ void __destroy_inode(struct inode *inode)
security_inode_free(inode);
fsnotify_inode_delete(inode);
#ifdef CONFIG_FS_POSIX_ACL
- if (inode->i_acl && inode->i_acl != ACL_NOT_CACHED)
- posix_acl_release(inode->i_acl);
- if (inode->i_default_acl && inode->i_default_acl != ACL_NOT_CACHED)
- posix_acl_release(inode->i_default_acl);
+ if (IS_POSIXACL(inode)) {
+ if (inode->i_acl && inode->i_acl != ACL_NOT_CACHED)
+ posix_acl_release(inode->i_acl);
+ if (inode->i_default_acl &&
+ inode->i_default_acl != ACL_NOT_CACHED)
+ posix_acl_release(inode->i_default_acl);
+ }
+#endif
+#ifdef CONFIG_FS_RICHACL
+ if (IS_RICHACL(inode)) {
+ if (inode->i_richacl && inode->i_richacl != ACL_NOT_CACHED)
+ richacl_put(inode->i_richacl);
+ }
#endif
this_cpu_dec(nr_inodes);
}
diff --git a/include/linux/fs.h b/include/linux/fs.h
index ac1d8e5..771955c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -755,6 +755,7 @@ static inline int mapping_writably_mapped(struct address_space *mapping)
#endif
struct posix_acl;
+struct richacl;
#define ACL_NOT_CACHED ((void *)(-1))
#define IOP_FASTPERM 0x0001
@@ -773,10 +774,17 @@ struct inode {
gid_t i_gid;
unsigned int i_flags;
+ union {
#ifdef CONFIG_FS_POSIX_ACL
- struct posix_acl *i_acl;
- struct posix_acl *i_default_acl;
+ struct {
+ struct posix_acl *i_acl;
+ struct posix_acl *i_default_acl;
+ };
#endif
+#ifdef CONFIG_FS_RICHACL
+ struct richacl *i_richacl;
+#endif
+ };
const struct inode_operations *i_op;
struct super_block *i_sb;
diff --git a/include/linux/richacl.h b/include/linux/richacl.h
index 761585a..694b7dc 100644
--- a/include/linux/richacl.h
+++ b/include/linux/richacl.h
@@ -189,6 +189,59 @@ richacl_put(struct richacl *acl)
kfree(acl);
}
+#ifdef CONFIG_FS_RICHACL
+static inline struct richacl *get_cached_richacl(struct inode *inode)
+{
+ struct richacl **p, *acl;
+
+ p = &inode->i_richacl;
+ acl = ACCESS_ONCE(*p);
+ if (acl) {
+ spin_lock(&inode->i_lock);
+ acl = *p;
+ if (acl != ACL_NOT_CACHED)
+ acl = richacl_get(acl);
+ spin_unlock(&inode->i_lock);
+ }
+ return acl;
+}
+
+static inline void set_cached_richacl(struct inode *inode,
+ struct richacl *acl)
+{
+ struct richacl *old = NULL;
+ spin_lock(&inode->i_lock);
+ old = inode->i_richacl;
+ inode->i_richacl = richacl_get(acl);
+ spin_unlock(&inode->i_lock);
+ if (old != ACL_NOT_CACHED)
+ richacl_put(old);
+}
+
+static inline void forget_cached_richacl(struct inode *inode)
+{
+ struct richacl *old = NULL;
+ spin_lock(&inode->i_lock);
+ old = inode->i_richacl;
+ inode->i_richacl = ACL_NOT_CACHED;
+ spin_unlock(&inode->i_lock);
+ if (old != ACL_NOT_CACHED)
+ richacl_put(old);
+}
+
+static inline int negative_cached_richacl(struct inode *inode)
+{
+ struct richacl **p, *acl;
+
+ p = &inode->i_richacl;
+ acl = ACCESS_ONCE(*p);
+ if (acl)
+ return 0;
+ return 1;
+}
+
+#endif
+
static inline int
richacl_is_auto_inherit(const struct richacl *acl)
{
--
1.7.5.4
next prev parent reply other threads:[~2011-10-18 15:32 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-18 15:32 [PATCH -V7 00/26] New ACL format for better NFSv4 acl interoperability Aneesh Kumar K.V
[not found] ` <1318951981-5508-1-git-send-email-aneesh.kumar-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2011-10-18 15:32 ` [PATCH -V7 01/26] vfs: Indicate that the permission functions take all the MAY_* flags Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 10/26] vfs: Make the inode passed to inode_change_ok non-const Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 11/26] vfs: Add permission flags for setting file attributes Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 16/26] richacl: Update the file masks in chmod() Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 21/26] richacl: xattr mapping functions Aneesh Kumar K.V
2011-10-19 22:20 ` J. Bruce Fields
2011-10-20 8:30 ` Aneesh Kumar K.V
2011-10-20 9:14 ` J. Bruce Fields
2011-10-20 9:19 ` Christoph Hellwig
[not found] ` <20111020091946.GA23773-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2011-10-20 10:25 ` J. Bruce Fields
[not found] ` <20111020102538.GG5444-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2011-10-20 23:46 ` Andreas Gruenbacher
2011-10-21 0:45 ` J. Bruce Fields
[not found] ` <1319154390.2270.52.camel-AB3ohll6rUCZ4toXJV50QQ@public.gmane.org>
2011-10-21 9:40 ` Aneesh Kumar K.V
2011-10-21 10:52 ` Andreas Gruenbacher
2011-10-21 13:12 ` Aneesh Kumar K.V
2011-10-21 23:58 ` Andreas Gruenbacher
2011-10-20 11:02 ` Aneesh Kumar K.V
[not found] ` <87aa8w53kj.fsf-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2011-10-20 17:49 ` J. Bruce Fields
2011-10-20 19:49 ` Andreas Dilger
2011-11-19 9:35 ` Eric W. Biederman
2011-11-19 9:28 ` Eric W. Biederman
2011-11-21 13:35 ` J. Bruce Fields
2011-10-18 15:32 ` [PATCH -V7 02/26] vfs: Add hex format for MAY_* flag values Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 03/26] vfs: Pass all mask flags down to iop->check_acl Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 04/26] vfs: Add a comment to inode_permission() Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 05/26] vfs: Add generic IS_ACL() test for acl support Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 06/26] vfs: Add IS_RICHACL() test for richacl support Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 07/26] vfs: Optimize out IS_RICHACL() if CONFIG_FS_RICHACL is not defined Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 08/26] vfs: Add new file and directory create permission flags Aneesh Kumar K.V
2011-10-19 16:42 ` J. Bruce Fields
[not found] ` <20111019164216.GC30864-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2011-10-20 5:20 ` Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 09/26] vfs: Add delete child and delete self " Aneesh Kumar K.V
2011-10-19 22:09 ` J. Bruce Fields
[not found] ` <20111019220915.GA1874-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2011-10-20 7:35 ` Aneesh Kumar K.V
2011-10-20 8:11 ` J. Bruce Fields
2011-10-18 15:32 ` [PATCH -V7 12/26] vfs: Make acl_permission_check() work for richacls Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 13/26] richacl: In-memory representation and helper functions Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 14/26] richacl: Permission mapping functions Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 15/26] richacl: Compute maximum file masks from an acl Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 17/26] richacl: Permission check algorithm Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 18/26] richacl: Create-time inheritance Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 19/26] richacl: Check if an acl is equivalent to a file mode Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 20/26] richacl: Automatic Inheritance Aneesh Kumar K.V
2011-10-18 15:32 ` Aneesh Kumar K.V [this message]
2011-10-18 15:32 ` [PATCH -V7 23/26] vfs: Add richacl permission check Aneesh Kumar K.V
2011-10-18 15:32 ` [PATCH -V7 24/26] ext4: Use IS_POSIXACL() to check for POSIX ACL support Aneesh Kumar K.V
2011-10-18 15:33 ` [PATCH -V7 25/26] ext4: Implement rich acl for ext4 Aneesh Kumar K.V
2011-10-18 18:41 ` Andreas Dilger
2011-10-19 5:43 ` Aneesh Kumar K.V
2011-10-18 15:33 ` [PATCH -V7 26/26] ext4: Add Ext4 compat richacl feature flag Aneesh Kumar K.V
2011-10-18 16:17 ` [PATCH -V7 00/26] New ACL format for better NFSv4 acl interoperability Shea Levy
2011-10-19 5:54 ` Aneesh Kumar K.V
2011-10-19 22:21 ` J. Bruce Fields
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