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Subject[PATCH -V3 2/6] fs/9p: Add xattr callbacks for POSIX ACL
Date
This patch implement fetching POSIX ACL from the server

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
fs/9p/acl.c | 41 +++++++++++++++++++++++++++++++++++++++++
fs/9p/xattr.c | 4 ++++
fs/9p/xattr.h | 2 ++
3 files changed, 47 insertions(+), 0 deletions(-)

diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index a8c0136..4293b45 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -94,3 +94,44 @@ int v9fs_check_acl(struct inode *inode, int mask)
}
return -EAGAIN;
}
+
+static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name,
+ void *buffer, size_t size, int type)
+{
+ struct posix_acl *acl;
+ int error;
+
+ if (strcmp(name, "") != 0)
+ return -EINVAL;
+
+ acl = v9fs_get_cached_acl(dentry->d_inode, type);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+ if (acl == NULL)
+ return -ENODATA;
+ error = posix_acl_to_xattr(acl, buffer, size);
+ posix_acl_release(acl);
+
+ return error;
+}
+
+static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
+ const void *value, size_t size,
+ int flags, int type)
+{
+ return 0;
+}
+
+const struct xattr_handler v9fs_xattr_acl_access_handler = {
+ .prefix = POSIX_ACL_XATTR_ACCESS,
+ .flags = ACL_TYPE_ACCESS,
+ .get = v9fs_xattr_get_acl,
+ .set = v9fs_xattr_set_acl,
+};
+
+const struct xattr_handler v9fs_xattr_acl_default_handler = {
+ .prefix = POSIX_ACL_XATTR_DEFAULT,
+ .flags = ACL_TYPE_DEFAULT,
+ .get = v9fs_xattr_get_acl,
+ .set = v9fs_xattr_set_acl,
+};
diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c
index 67ac6cf..43ec7df 100644
--- a/fs/9p/xattr.c
+++ b/fs/9p/xattr.c
@@ -164,5 +164,9 @@ ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)

const struct xattr_handler *v9fs_xattr_handlers[] = {
&v9fs_xattr_user_handler,
+#ifdef CONFIG_9P_FS_POSIX_ACL
+ &v9fs_xattr_acl_access_handler,
+ &v9fs_xattr_acl_default_handler,
+#endif
NULL
};
diff --git a/fs/9p/xattr.h b/fs/9p/xattr.h
index ec908c6..eaa837c 100644
--- a/fs/9p/xattr.h
+++ b/fs/9p/xattr.h
@@ -20,6 +20,8 @@

extern const struct xattr_handler *v9fs_xattr_handlers[];
extern struct xattr_handler v9fs_xattr_user_handler;
+extern const struct xattr_handler v9fs_xattr_acl_access_handler;
+extern const struct xattr_handler v9fs_xattr_acl_default_handler;

extern ssize_t v9fs_fid_xattr_get(struct p9_fid *, const char *,
void *, size_t);
--
1.7.0.4


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