From: Andreas Gruenbacher <agruenba@redhat.com>
To: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andreas Gruenbacher <agruenba@redhat.com>,
Christoph Hellwig <hch@infradead.org>,
"Theodore Ts'o" <tytso@mit.edu>,
Andreas Dilger <adilger.kernel@dilger.ca>,
"J. Bruce Fields" <bfields@fieldses.org>,
Jeff Layton <jlayton@poochiereds.net>,
Trond Myklebust <trond.myklebust@primarydata.com>,
Anna Schumaker <anna.schumaker@netapp.com>,
Dave Chinner <david@fromorbit.com>,
linux-ext4@vger.kernel.org, xfs@oss.sgi.com,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org,
linux-api@vger.kernel.org
Subject: [PATCH v19 14/23] vfs: Cache richacl in struct inode
Date: Mon, 14 Mar 2016 15:55:13 +0100 [thread overview]
Message-ID: <1457967322-14886-15-git-send-email-agruenba@redhat.com> (raw)
In-Reply-To: <1457967322-14886-1-git-send-email-agruenba@redhat.com>
Cache richacls in struct inode so that this doesn't have to be done
individually in each filesystem. This is similar to POSIX ACLs.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
fs/inode.c | 11 +++++--
fs/posix_acl.c | 2 +-
fs/richacl_inode.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++
include/linux/fs.h | 5 +++-
include/linux/richacl.h | 6 ++++
5 files changed, 96 insertions(+), 5 deletions(-)
diff --git a/fs/inode.c b/fs/inode.c
index 101d806..de80116 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -180,8 +180,11 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
inode->i_private = NULL;
inode->i_mapping = mapping;
INIT_HLIST_HEAD(&inode->i_dentry); /* buggered by rcu freeing */
-#ifdef CONFIG_FS_POSIX_ACL
- inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
+#if defined(CONFIG_FS_POSIX_ACL) || defined(CONFIG_FS_RICHACL)
+ inode->i_acl = ACL_NOT_CACHED;
+# if defined(CONFIG_FS_POSIX_ACL)
+ inode->i_default_acl = ACL_NOT_CACHED;
+# endif
#endif
#ifdef CONFIG_FSNOTIFY
@@ -237,11 +240,13 @@ void __destroy_inode(struct inode *inode)
atomic_long_dec(&inode->i_sb->s_remove_count);
}
-#ifdef CONFIG_FS_POSIX_ACL
+#if defined(CONFIG_FS_POSIX_ACL) || defined(CONFIG_FS_RICHACL)
if (inode->i_acl && inode->i_acl != ACL_NOT_CACHED)
base_acl_put(inode->i_acl);
+# if defined(CONFIG_FS_POSIX_ACL)
if (inode->i_default_acl && inode->i_default_acl != ACL_NOT_CACHED)
base_acl_put(inode->i_default_acl);
+# endif
#endif
this_cpu_dec(nr_inodes);
}
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 743b6dc..f24646e 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -37,7 +37,7 @@ struct posix_acl *get_cached_acl(struct inode *inode, int type)
{
struct base_acl **p = acl_by_type(inode, type);
struct base_acl *acl = ACCESS_ONCE(*p);
- if (acl) {
+ if (acl && IS_POSIXACL(inode)) {
spin_lock(&inode->i_lock);
acl = *p;
if (acl != ACL_NOT_CACHED)
diff --git a/fs/richacl_inode.c b/fs/richacl_inode.c
index 99b3c93..52c1595 100644
--- a/fs/richacl_inode.c
+++ b/fs/richacl_inode.c
@@ -20,6 +20,83 @@
#include <linux/slab.h>
#include <linux/richacl.h>
+struct richacl *get_cached_richacl(struct inode *inode)
+{
+ struct base_acl *acl;
+
+ acl = ACCESS_ONCE(inode->i_acl);
+ if (acl && IS_RICHACL(inode)) {
+ spin_lock(&inode->i_lock);
+ acl = inode->i_acl;
+ if (acl != ACL_NOT_CACHED)
+ base_acl_get(acl);
+ spin_unlock(&inode->i_lock);
+ }
+ return container_of(acl, struct richacl, a_base);
+}
+EXPORT_SYMBOL_GPL(get_cached_richacl);
+
+struct richacl *get_cached_richacl_rcu(struct inode *inode)
+{
+ struct base_acl *acl = rcu_dereference(inode->i_acl);
+
+ return container_of(acl, struct richacl, a_base);
+}
+EXPORT_SYMBOL_GPL(get_cached_richacl_rcu);
+
+void set_cached_richacl(struct inode *inode, struct richacl *acl)
+{
+ struct base_acl *old = NULL;
+
+ spin_lock(&inode->i_lock);
+ old = inode->i_acl;
+ rcu_assign_pointer(inode->i_acl, &richacl_get(acl)->a_base);
+ spin_unlock(&inode->i_lock);
+ if (old != ACL_NOT_CACHED)
+ base_acl_put(old);
+}
+EXPORT_SYMBOL_GPL(set_cached_richacl);
+
+void forget_cached_richacl(struct inode *inode)
+{
+ struct base_acl *old = NULL;
+
+ spin_lock(&inode->i_lock);
+ old = inode->i_acl;
+ inode->i_acl = ACL_NOT_CACHED;
+ spin_unlock(&inode->i_lock);
+ if (old != ACL_NOT_CACHED)
+ base_acl_put(old);
+}
+EXPORT_SYMBOL_GPL(forget_cached_richacl);
+
+struct richacl *get_richacl(struct inode *inode)
+{
+ struct richacl *acl;
+
+ acl = get_cached_richacl(inode);
+ if (acl != ACL_NOT_CACHED)
+ return acl;
+
+ if (!IS_RICHACL(inode))
+ return NULL;
+
+ /*
+ * A filesystem can force a ACL callback by just never filling the
+ * ACL cache. But normally you'd fill the cache either at inode
+ * instantiation time, or on the first ->get_richacl call.
+ *
+ * If the filesystem doesn't have a get_richacl() function at all,
+ * we'll just create the negative cache entry.
+ */
+ if (!inode->i_op->get_richacl) {
+ set_cached_richacl(inode, NULL);
+ return NULL;
+ }
+ return inode->i_op->get_richacl(inode);
+}
+EXPORT_SYMBOL_GPL(get_richacl);
+
/**
* richacl_permission - richacl permission check algorithm
* @inode: inode to check
diff --git a/include/linux/fs.h b/include/linux/fs.h
index e04dbb4..560f4e0 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -585,6 +585,7 @@ struct base_acl {
};
};
struct posix_acl;
+struct richacl;
#define ACL_NOT_CACHED ((void *)(-1))
#define IOP_FASTPERM 0x0001
@@ -603,9 +604,11 @@ struct inode {
kgid_t i_gid;
unsigned int i_flags;
-#if defined(CONFIG_FS_POSIX_ACL)
+#if defined(CONFIG_FS_POSIX_ACL) || defined(CONFIG_FS_RICHACL)
struct base_acl *i_acl;
+# if defined(CONFIG_FS_POSIX_ACL)
struct base_acl *i_default_acl;
+# endif
#endif
const struct inode_operations *i_op;
diff --git a/include/linux/richacl.h b/include/linux/richacl.h
index 7628fad..7bf912b6 100644
--- a/include/linux/richacl.h
+++ b/include/linux/richacl.h
@@ -70,6 +70,12 @@ richacl_put(struct richacl *acl)
base_acl_put(&acl->a_base);
}
+extern struct richacl *get_cached_richacl(struct inode *);
+extern struct richacl *get_cached_richacl_rcu(struct inode *);
+extern void set_cached_richacl(struct inode *, struct richacl *);
+extern void forget_cached_richacl(struct inode *);
+extern struct richacl *get_richacl(struct inode *);
+
/**
* richace_is_owner - check if @ace is an OWNER@ entry
*/
--
2.5.0
next prev parent reply other threads:[~2016-03-14 14:56 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-14 14:54 [PATCH v19 00/23] Richacls (Core and Ext4) Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 01/23] vfs: Add IS_ACL() and IS_RICHACL() tests Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 02/23] vfs: Add MAY_CREATE_FILE and MAY_CREATE_DIR permission flags Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 03/23] vfs: Add MAY_DELETE_SELF and MAY_DELETE_CHILD " Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 04/23] vfs: Make the inode passed to inode_change_ok non-const Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 05/23] vfs: Add permission flags for setting file attributes Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 06/23] richacl: In-memory representation and helper functions Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 07/23] richacl: Permission mapping functions Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 08/23] richacl: Compute maximum file masks from an acl Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 09/23] richacl: Permission check algorithm Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 10/23] posix_acl: Unexport acl_by_type and make it static Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 11/23] posix_acl: Improve xattr fixup code Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 12/23] vfs: Cache base_acl objects in inodes Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 13/23] vfs: Add get_richacl and set_richacl inode operations Andreas Gruenbacher
2016-03-14 14:55 ` Andreas Gruenbacher [this message]
2016-03-14 14:55 ` [PATCH v19 15/23] richacl: Update the file masks in chmod() Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 16/23] richacl: Check if an acl is equivalent to a file mode Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 17/23] richacl: Create-time inheritance Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 18/23] richacl: Automatic Inheritance Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 19/23] richacl: xattr mapping functions Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 20/23] richacl: Add richacl xattr handler Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 21/23] vfs: Add richacl permission checking Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 22/23] ext4: Add richacl support Andreas Gruenbacher
2016-03-14 14:55 ` [PATCH v19 23/23] ext4: Add richacl feature flag Andreas Gruenbacher
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