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Date: Wed, 2 Dec 2015 14:44:41 +0100
From: Andreas Gruenbacher <agruenba@...hat.com>
To: Alexander Viro <viro@...iv.linux.org.uk>,
Christoph Hellwig <hch@...radead.org>,
linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc: Andreas Gruenbacher <agruenba@...hat.com>,
Trond Myklebust <trond.myklebust@...marydata.com>,
Anna Schumaker <anna.schumaker@...app.com>,
linux-nfs@...r.kernel.org
Subject: [PATCH v2 09/11] nfs: Move call to security_inode_listsecurity into nfs_listxattr
Add a nfs_listxattr operation. Move the call to security_inode_listsecurity
from list operation of the "security.*" xattr handler to nfs_listxattr.
Signed-off-by: Andreas Gruenbacher <agruenba@...hat.com>
Cc: Trond Myklebust <trond.myklebust@...marydata.com>
Cc: Anna Schumaker <anna.schumaker@...app.com>
Cc: linux-nfs@...r.kernel.org
---
fs/nfs/nfs4proc.c | 53 +++++++++++++++++++++++++++++++---------------
security/smack/smack_lsm.c | 2 --
2 files changed, 36 insertions(+), 19 deletions(-)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index f6f40aa..914cb3d 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -6279,10 +6279,6 @@ static size_t nfs4_xattr_list_nfs4_acl(const struct xattr_handler *handler,
}
#ifdef CONFIG_NFS_V4_SECURITY_LABEL
-static inline int nfs4_server_supports_labels(struct nfs_server *server)
-{
- return server->caps & NFS_CAP_SECURITY_LABEL;
-}
static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
struct dentry *dentry, const char *key,
@@ -6304,29 +6300,34 @@ static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
return -EOPNOTSUPP;
}
-static size_t nfs4_xattr_list_nfs4_label(const struct xattr_handler *handler,
- struct dentry *dentry, char *list,
- size_t list_len, const char *name,
- size_t name_len)
+static ssize_t
+nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
{
- size_t len = 0;
+ int len = 0;
- if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
- len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
- if (list && len <= list_len)
- security_inode_listsecurity(d_inode(dentry), list, len);
+ if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
+ len = security_inode_listsecurity(inode, list, len);
+ if (len > list_len)
+ return -ERANGE;
}
return len;
}
static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
.prefix = XATTR_SECURITY_PREFIX,
- .list = nfs4_xattr_list_nfs4_label,
.get = nfs4_xattr_get_nfs4_label,
.set = nfs4_xattr_set_nfs4_label,
};
-#endif
+#else
+
+static ssize_t
+nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
+{
+ return 0;
+}
+
+#endif
/*
* nfs_fhget will use either the mounted_on_fileid or the fileid
@@ -8743,6 +8744,24 @@ const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
#endif
};
+ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
+{
+ ssize_t error, error2;
+
+ error = generic_listxattr(dentry, list, size);
+ if (error < 0)
+ return error;
+ if (list) {
+ list += error;
+ size -= error;
+ }
+
+ error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
+ if (error2 < 0)
+ return error2;
+ return error + error2;
+}
+
static const struct inode_operations nfs4_dir_inode_operations = {
.create = nfs_create,
.lookup = nfs_lookup,
@@ -8759,7 +8778,7 @@ static const struct inode_operations nfs4_dir_inode_operations = {
.setattr = nfs_setattr,
.getxattr = generic_getxattr,
.setxattr = generic_setxattr,
- .listxattr = generic_listxattr,
+ .listxattr = nfs4_listxattr,
.removexattr = generic_removexattr,
};
@@ -8769,7 +8788,7 @@ static const struct inode_operations nfs4_file_inode_operations = {
.setattr = nfs_setattr,
.getxattr = generic_getxattr,
.setxattr = generic_setxattr,
- .listxattr = generic_listxattr,
+ .listxattr = nfs4_listxattr,
.removexattr = generic_removexattr,
};
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index ff81026..37fdd54 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1519,8 +1519,6 @@ static int smack_inode_getsecurity(const struct inode *inode,
* @inode: the object
* @buffer: where they go
* @buffer_size: size of buffer
- *
- * Returns 0 on success, -EINVAL otherwise
*/
static int smack_inode_listsecurity(struct inode *inode, char *buffer,
size_t buffer_size)
--
2.5.0
--
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