From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: sfrench@us.ibm.com, ffilz@us.ibm.com, agruen@suse.de,
adilger@sun.com, sandeen@redhat.com, tytso@mit.edu,
staubach@redhat.com, bfields@citi.umich.edu, jlayton@redhat.com
Cc: aneesh.kumar@linux.vnet.ibm.com, linux-fsdevel@vger.kernel.org,
nfsv4@linux-nfs.org, linux-ext4@vger.kernel.org
Subject: [PATCH 18/23] richacl: Add helper function for creating richacl from mode values.
Date: Mon, 1 Feb 2010 11:05:00 +0530 [thread overview]
Message-ID: <1265002505-8387-19-git-send-email-aneesh.kumar@linux.vnet.ibm.com> (raw)
In-Reply-To: <1265002505-8387-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
When we don't have richacl stored on disk for permission check
we need to generate richacl from mode values. This patch adds
a helper function for doing that.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
fs/richacl_base.c | 29 +++++++++++++++++++++++++++++
include/linux/richacl.h | 1 +
2 files changed, 30 insertions(+), 0 deletions(-)
diff --git a/fs/richacl_base.c b/fs/richacl_base.c
index 4a340d7..5d61b30 100644
--- a/fs/richacl_base.c
+++ b/fs/richacl_base.c
@@ -640,3 +640,32 @@ richacl_inherit(const struct richacl *dir_acl, mode_t mode)
return acl;
}
EXPORT_SYMBOL_GPL(richacl_inherit);
+
+struct richacl *
+richacl_from_mode(mode_t mode)
+{
+ struct richacl *acl;
+ struct richace *ace;
+ int is_dir = S_ISDIR(mode);
+
+ acl = richacl_alloc(1);
+ if (!acl)
+ return NULL;
+ ace = acl->a_entries;
+
+ acl->a_owner_mask = richacl_mode_to_mask(mode >> 6, is_dir);
+ acl->a_group_mask = richacl_mode_to_mask(mode >> 3, is_dir);
+ acl->a_other_mask = richacl_mode_to_mask(mode, is_dir);
+
+ ace->e_type = ACE4_ACCESS_ALLOWED_ACE_TYPE;
+ ace->e_flags = ACE4_SPECIAL_WHO;
+ ace->e_mask = ACE4_VALID_MASK;
+ ace->u.e_who = richace_everyone_who;
+ if (richacl_apply_masks(&acl)) {
+ richacl_put(acl);
+ acl = NULL;
+ }
+ return acl;
+
+}
+EXPORT_SYMBOL_GPL(richacl_from_mode);
diff --git a/include/linux/richacl.h b/include/linux/richacl.h
index 705e061..ecb76bc 100644
--- a/include/linux/richacl.h
+++ b/include/linux/richacl.h
@@ -238,5 +238,6 @@ extern int richacl_apply_masks(struct richacl **acl);
extern int richacl_write_through(struct richacl **acl);
extern struct richacl *map_posix_to_richacl(struct inode *, struct posix_acl *,
struct posix_acl *);
+extern struct richacl *richacl_from_mode(mode_t);
#endif /* __RICHACL_H */
--
1.7.0.rc0.48.gdace5
next prev parent reply other threads:[~2010-02-01 5:35 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-01 5:34 [RFC PATCH] New ACL format for better NFSv4 acl interoperability Aneesh Kumar K.V
2010-02-01 5:34 ` [PATCH 01/23] vfs: VFS hooks for per-filesystem permission models Aneesh Kumar K.V
2010-02-01 5:34 ` [PATCH 02/23] vfs: Check for create permission during rename Aneesh Kumar K.V
2010-02-01 5:34 ` [PATCH 03/23] vfs: rich ACL in-memory representation and manipulation Aneesh Kumar K.V
2010-02-01 7:28 ` Brad Boyer
2010-02-01 18:02 ` Aneesh Kumar K. V
2010-02-01 23:06 ` J. Bruce Fields
2010-02-01 23:21 ` J. Bruce Fields
2010-02-01 5:34 ` [PATCH 04/23] richacl: Add write retention and retention hold access mask Aneesh Kumar K.V
2010-02-01 5:34 ` [PATCH 05/23] ext4: Implement rich acl for ext4 Aneesh Kumar K.V
2010-02-01 5:34 ` [PATCH 06/23] vfs: Implement those parts of Automatic Inheritance (AI) which are safe under POSIX Aneesh Kumar K.V
2010-02-01 5:34 ` [PATCH 07/23] vfs: Add Posix acl to rich acl mapping helpers Aneesh Kumar K.V
2010-02-01 23:18 ` J. Bruce Fields
2010-02-02 5:22 ` Aneesh Kumar K. V
2010-02-01 5:34 ` [PATCH 08/23] vfs: Add a flag to denote posix mapped richacl Aneesh Kumar K.V
2010-02-01 23:18 ` J. Bruce Fields
2010-02-02 5:33 ` Aneesh Kumar K. V
2010-02-02 15:18 ` J. Bruce Fields
2010-02-01 5:34 ` [PATCH 09/23] ext4: Add posix acl to rich acl mapping Aneesh Kumar K.V
2010-02-01 5:34 ` [PATCH 10/23] richacl: Add separate file and dir acl masks Aneesh Kumar K.V
2010-02-01 5:34 ` [PATCH 11/23] richacl: Move the xattr representation to little-endian format Aneesh Kumar K.V
2010-02-01 23:34 ` J. Bruce Fields
2010-02-02 5:35 ` Aneesh Kumar K. V
2010-02-01 5:34 ` [PATCH 12/23] richacl: Use directory specific mask values for operation on directories Aneesh Kumar K.V
2010-02-01 5:34 ` [PATCH 13/23] richacl: Follow nfs4 acl delete definition Aneesh Kumar K.V
2010-02-01 5:34 ` [PATCH 14/23] richacl: Disable automatic inheritance with posix mapped acls Aneesh Kumar K.V
2010-02-01 5:34 ` [PATCH 15/23] richacl: Delete posix acl if present on richacl set Aneesh Kumar K.V
2010-02-01 5:34 ` [PATCH 16/23] ext4: Update richacl incompat flag value Aneesh Kumar K.V
2010-02-01 23:41 ` J. Bruce Fields
2010-02-01 5:34 ` [PATCH 17/23] vfs: Add new MS_ACL and MS_RICHACL flag Aneesh Kumar K.V
2010-02-01 5:35 ` Aneesh Kumar K.V [this message]
2010-02-01 5:35 ` [PATCH 19/23] fs: Use the correct MS_*ACL flags in file system code Aneesh Kumar K.V
2010-02-01 5:35 ` [PATCH 20/23] nfsd: Apply NFSv4acl to posix acl mapping only if MS_POSIXACL is set Aneesh Kumar K.V
2010-02-01 5:35 ` [PATCH 21/23] richacl: Add helpers for NFSv4 acl to richacl conversion Aneesh Kumar K.V
2010-02-01 5:35 ` [PATCH 22/23] nfsd: Add support for reading rich acl from file system Aneesh Kumar K.V
2010-02-01 5:35 ` [PATCH 23/23] nfsd: Add support for saving richacl Aneesh Kumar K.V
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