From: Andreas Gruenbacher <andreas.gruenbacher@gmail.com>
To: Alexander Viro <viro@zeniv.linux.org.uk>,
"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
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Subject: [PATCH v10 18/46] richacl: Add richacl xattr handler
Date: Mon, 12 Oct 2015 00:58:29 +0200 [thread overview]
Message-ID: <1444604337-17651-19-git-send-email-andreas.gruenbacher@gmail.com> (raw)
In-Reply-To: <1444604337-17651-1-git-send-email-andreas.gruenbacher@gmail.com>
From: Andreas Gruenbacher <agruenba@redhat.com>
Add richacl xattr handler implementing the xattr operations based on the
get_richacl and set_richacl inode operations.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
fs/richacl_xattr.c | 78 +++++++++++++++++++++++++++++++++++++++++++
include/linux/richacl_xattr.h | 2 ++
2 files changed, 80 insertions(+)
diff --git a/fs/richacl_xattr.c b/fs/richacl_xattr.c
index cd9979d..dc529dc 100644
--- a/fs/richacl_xattr.c
+++ b/fs/richacl_xattr.c
@@ -18,7 +18,9 @@
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/module.h>
+#include <linux/xattr.h>
#include <linux/richacl_xattr.h>
+#include <uapi/linux/xattr.h>
MODULE_LICENSE("GPL");
@@ -161,6 +163,82 @@ richacl_to_xattr(struct user_namespace *user_ns,
}
EXPORT_SYMBOL_GPL(richacl_to_xattr);
+static size_t
+richacl_xattr_list(struct dentry *dentry, char *list, size_t list_len,
+ const char *name, size_t name_len, int handler_flags)
+{
+ const size_t size = sizeof(XATTR_NAME_RICHACL);
+
+ if (!IS_RICHACL(d_backing_inode(dentry)))
+ return 0;
+ if (list && size <= list_len)
+ memcpy(list, XATTR_NAME_RICHACL, size);
+ return size;
+}
+
+static int
+richacl_xattr_get(struct dentry *dentry, const char *name, void *buffer,
+ size_t buffer_size, int handler_flags)
+{
+ struct inode *inode = d_backing_inode(dentry);
+ struct richacl *acl;
+ int error;
+
+ if (strcmp(name, "") != 0)
+ return -EINVAL;
+ if (!IS_RICHACL(inode))
+ return EOPNOTSUPP;
+ if (S_ISLNK(inode->i_mode))
+ return -EOPNOTSUPP;
+ acl = get_richacl(inode);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ if (acl == NULL)
+ return -ENODATA;
+ error = richacl_to_xattr(&init_user_ns, acl, buffer, buffer_size);
+ richacl_put(acl);
+ return error;
+}
+
+static int
+richacl_xattr_set(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags, int handler_flags)
+{
+ struct inode *inode = d_backing_inode(dentry);
+ struct richacl *acl = NULL;
+ int ret;
+
+ if (strcmp(name, "") != 0)
+ return -EINVAL;
+ if (!IS_RICHACL(inode))
+ return -EOPNOTSUPP;
+ if (!inode->i_op->set_richacl)
+ return -EOPNOTSUPP;
+
+ if (!uid_eq(current_fsuid(), inode->i_uid) &&
+ inode_permission(inode, MAY_CHMOD) &&
+ !capable(CAP_FOWNER))
+ return -EPERM;
+
+ if (value) {
+ acl = richacl_from_xattr(&init_user_ns, value, size);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ }
+
+ ret = inode->i_op->set_richacl(inode, acl);
+ richacl_put(acl);
+ return ret;
+}
+
+struct xattr_handler richacl_xattr_handler = {
+ .prefix = XATTR_NAME_RICHACL,
+ .list = richacl_xattr_list,
+ .get = richacl_xattr_get,
+ .set = richacl_xattr_set,
+};
+EXPORT_SYMBOL(richacl_xattr_handler);
+
/*
* Fix up the uids and gids in richacl extended attributes in place.
*/
diff --git a/include/linux/richacl_xattr.h b/include/linux/richacl_xattr.h
index f84cc21..dac4e32 100644
--- a/include/linux/richacl_xattr.h
+++ b/include/linux/richacl_xattr.h
@@ -59,4 +59,6 @@ static inline void richacl_fix_xattr_to_user(void *value, size_t size)
}
#endif
+extern struct xattr_handler richacl_xattr_handler;
+
#endif /* __RICHACL_XATTR_H */
--
2.5.0
next prev parent reply other threads:[~2015-10-11 23:01 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-11 22:58 [PATCH v10 00/46] Richacls Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 01/46] vfs: Add IS_ACL() and IS_RICHACL() tests Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 02/46] vfs: Add MAY_CREATE_FILE and MAY_CREATE_DIR permission flags Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 03/46] vfs: Add MAY_DELETE_SELF and MAY_DELETE_CHILD " Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 04/46] vfs: Make the inode passed to inode_change_ok non-const Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 05/46] vfs: Add permission flags for setting file attributes Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 06/46] richacl: In-memory representation and helper functions Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 07/46] richacl: Permission mapping functions Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 08/46] richacl: Compute maximum file masks from an acl Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 09/46] richacl: Permission check algorithm Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 10/46] vfs: Cache base_acl objects in inodes Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 11/46] vfs: Add get_richacl and set_richacl inode operations Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 12/46] vfs: Cache richacl in struct inode Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 13/46] richacl: Update the file masks in chmod() Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 14/46] richacl: Check if an acl is equivalent to a file mode Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 15/46] richacl: Create-time inheritance Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 16/46] richacl: Automatic Inheritance Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 17/46] richacl: xattr mapping functions Andreas Gruenbacher
2015-10-11 22:58 ` Andreas Gruenbacher [this message]
2015-10-11 22:58 ` [PATCH v10 19/46] vfs: Add richacl permission checking Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 20/46] ext4: Add richacl support Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 21/46] ext4: Add richacl feature flag Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 22/46] xfs: Fix error path in xfs_get_acl Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 23/46] xfs: Make xfs_set_mode non-static Andreas Gruenbacher
2015-10-11 23:37 ` Dave Chinner
2015-10-11 22:58 ` [PATCH v10 24/46] xfs: Add richacl support Andreas Gruenbacher
2015-10-12 0:10 ` Dave Chinner
2015-10-12 1:51 ` Andreas Grünbacher
2015-10-12 4:05 ` Dave Chinner
2015-10-12 5:57 ` Andreas Gruenbacher
2015-10-13 19:21 ` Austin S Hemmelgarn
2015-10-13 13:39 ` Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 25/46] richacl: acl editing helper functions Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 26/46] richacl: Move everyone@ aces down the acl Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 27/46] richacl: Propagate everyone@ permissions to other aces Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 28/46] richacl: Set the owner permissions to the owner mask Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 29/46] richacl: Set the other permissions to the other mask Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 30/46] richacl: Isolate the owner and group classes Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 31/46] richacl: Apply the file masks to a richacl Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 32/46] richacl: Create richacl from mode values Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 33/46] nfsd: Keep list of acls to dispose of in compoundargs Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 34/46] nfsd: Use richacls as internal acl representation Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 35/46] nfsd: Add richacl support Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 36/46] nfsd: Add support for the v4.1 dacl attribute Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 37/46] nfsd: Add support for the MAY_CREATE_{FILE,DIR} permissions Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 38/46] richacl: Add support for unmapped identifiers Andreas Gruenbacher
2015-10-12 0:22 ` Dave Chinner
2015-10-12 1:53 ` Andreas Grünbacher
2015-10-11 22:58 ` [PATCH v10 39/46] ext4: Don't allow unmapped identifiers in richacls Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 40/46] sunrpc: Allow to demand-allocate pages to encode into Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 41/46] sunrpc: Add xdr_init_encode_pages Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 42/46] nfs: Fix GETATTR bitmap verification Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 43/46] nfs: Remove unused xdr page offsets in getacl/setacl arguments Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 44/46] nfs: Add richacl support Andreas Gruenbacher
2015-10-12 14:39 ` Anna Schumaker
2015-10-12 19:49 ` Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 45/46] nfs: Add support for the v4.1 dacl attribute Andreas Gruenbacher
2015-10-11 22:58 ` [PATCH v10 46/46] richacl: uapi header split Andreas Gruenbacher
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