From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: sfrench@us.ibm.com, agruen@linbit.com, dilger.kernel@dilger.ca,
sandeen@redhat.com, tytso@mit.edu, bfields@fieldses.org,
jlayton@redhat.com
Cc: aneesh.kumar@linux.vnet.ibm.com, linux-fsdevel@vger.kernel.org,
linux-nfs@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-kernel@vger.kernel.org,
Andreas Gruenbacher <agruen@suse.de>
Subject: [PATCH -V5 22/24] vfs: Cache richacl in struct inode
Date: Wed, 23 Feb 2011 19:22:09 +0530 [thread overview]
Message-ID: <1298469131-16555-23-git-send-email-aneesh.kumar@linux.vnet.ibm.com> (raw)
In-Reply-To: <1298469131-16555-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
From: Andreas Gruenbacher <agruen@suse.de>
Cache richacls in struct inode so that this doesn't have to be done
individually in each filesystem.
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
fs/inode.c | 24 ++++++++++++++++----
include/linux/fs.h | 12 ++++++++-
include/linux/richacl.h | 53 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 82 insertions(+), 7 deletions(-)
diff --git a/fs/inode.c b/fs/inode.c
index da85e56..381edca 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -25,6 +25,7 @@
#include <linux/async.h>
#include <linux/posix_acl.h>
#include <linux/ima.h>
+#include <linux/richacl.h>
/*
* This is needed for the following functions:
@@ -219,7 +220,12 @@ 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
@@ -269,10 +275,18 @@ 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 != ACL_NOT_CACHED)
+ posix_acl_release(inode->i_acl);
+ if (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 != 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 1627592..77ce324 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -754,6 +754,7 @@ static inline int mapping_writably_mapped(struct address_space *mapping)
#endif
struct posix_acl;
+struct richacl;
#define ACL_NOT_CACHED ((void *)(-1))
struct inode {
@@ -824,10 +825,17 @@ struct inode {
#ifdef CONFIG_SECURITY
void *i_security;
#endif
+ 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
+ };
void *i_private; /* fs or device private pointer */
};
diff --git a/include/linux/richacl.h b/include/linux/richacl.h
index 23befbc..c788a91 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)
{
--
1.7.1
next prev parent reply other threads:[~2011-02-23 13:52 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-23 13:51 [PATCH -V5 00/24] New ACL format for better NFSv4 acl interoperability Aneesh Kumar K.V
2011-02-23 13:51 ` [PATCH -V5 01/24] vfs: Indicate that the permission functions take all the MAY_* flags Aneesh Kumar K.V
2011-02-23 13:51 ` [PATCH -V5 04/24] vfs: Add generic IS_ACL() test for acl support Aneesh Kumar K.V
2011-02-23 13:51 ` [PATCH -V5 05/24] vfs: Add IS_RICHACL() test for richacl support Aneesh Kumar K.V
2011-02-23 13:51 ` [PATCH -V5 06/24] vfs: Optimize out IS_RICHACL() if CONFIG_FS_RICHACL is not defined Aneesh Kumar K.V
2011-02-23 13:51 ` [PATCH -V5 07/24] vfs: Add new file and directory create permission flags Aneesh Kumar K.V
2011-02-23 13:51 ` [PATCH -V5 08/24] vfs: Add delete child and delete self " Aneesh Kumar K.V
2011-02-23 13:51 ` [PATCH -V5 09/24] vfs: Make the inode passed to inode_change_ok non-const Aneesh Kumar K.V
2011-02-23 13:51 ` [PATCH -V5 10/24] vfs: Add permission flags for setting file attributes Aneesh Kumar K.V
2011-02-23 13:51 ` [PATCH -V5 11/24] vfs: Make acl_permission_check() work for richacls Aneesh Kumar K.V
2011-02-23 13:51 ` [PATCH -V5 12/24] richacl: In-memory representation and helper functions Aneesh Kumar K.V
2011-02-23 13:52 ` [PATCH -V5 13/24] richacl: Permission mapping functions Aneesh Kumar K.V
2011-02-23 13:52 ` [PATCH -V5 16/24] richacl: Permission check algorithm Aneesh Kumar K.V
2011-02-23 13:52 ` [PATCH -V5 17/24] richacl: Create-time inheritance Aneesh Kumar K.V
2011-02-23 13:52 ` [PATCH -V5 18/24] richacl: Check if an acl is equivalent to a file mode Aneesh Kumar K.V
2011-02-23 13:52 ` [PATCH -V5 19/24] richacl: Automatic Inheritance Aneesh Kumar K.V
2011-02-23 13:52 ` [PATCH -V5 20/24] richacl: xattr mapping functions Aneesh Kumar K.V
2011-02-23 13:52 ` [PATCH -V5 21/24] ext4: Use IS_POSIXACL() to check for POSIX ACL support Aneesh Kumar K.V
2011-02-23 13:52 ` Aneesh Kumar K.V [this message]
2011-02-23 13:52 ` [PATCH -V5 23/24] ext4: Implement rich acl for ext4 Aneesh Kumar K.V
2011-02-23 13:52 ` [PATCH -V5 24/24] ext4: Add temporary richacl mount option " Aneesh Kumar K.V
[not found] ` <1298469131-16555-1-git-send-email-aneesh.kumar-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2011-02-23 13:51 ` [PATCH -V5 02/24] vfs: Pass all mask flags down to iop->check_acl Aneesh Kumar K.V
2011-02-23 13:51 ` [PATCH -V5 03/24] vfs: Add a comment to inode_permission() Aneesh Kumar K.V
2011-02-23 13:52 ` [PATCH -V5 14/24] richacl: Compute maximum file masks from an acl Aneesh Kumar K.V
2011-02-23 13:52 ` [PATCH -V5 15/24] richacl: Update the file masks in chmod() Aneesh Kumar K.V
2011-02-28 21:11 ` [PATCH -V5 00/24] New ACL format for better NFSv4 acl interoperability Ted Ts'o
2011-03-01 6:50 ` Aneesh Kumar K. V
2011-03-02 15:49 ` J. Bruce Fields
[not found] ` <20110302154943.GB29136-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2011-03-02 17:47 ` Aneesh Kumar K. V
[not found] ` <87ei6pza5v.fsf-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2011-03-02 18:58 ` J. Bruce Fields
2011-03-04 10:38 ` Aneesh Kumar K. V
2011-03-05 0:32 ` J. Bruce Fields
[not found] ` <20110305003214.GF21260-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>
2011-03-05 17:58 ` Aneesh Kumar K. V
2011-03-15 8:46 ` Andreas Gruenbacher
2011-05-11 22:16 ` Björn JACKE
[not found] ` <E1QKJAl-00DGc7-EB@intern.SerNet.DE>
2011-05-13 15:40 ` Aneesh Kumar K.V
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