[GFS2] The core of GFS2
This patch contains all the core files for GFS2.
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/eaops.c b/fs/gfs2/eaops.c
new file mode 100644
index 0000000..2914731
--- /dev/null
+++ b/fs/gfs2/eaops.c
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License v.2.
+ */
+
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/completion.h>
+#include <linux/buffer_head.h>
+#include <linux/xattr.h>
+#include <asm/semaphore.h>
+#include <asm/uaccess.h>
+
+#include "gfs2.h"
+#include "acl.h"
+#include "eaops.h"
+#include "eattr.h"
+
+/**
+ * gfs2_ea_name2type - get the type of the ea, and truncate type from the name
+ * @namep: ea name, possibly with type appended
+ *
+ * Returns: GFS2_EATYPE_XXX
+ */
+
+unsigned int gfs2_ea_name2type(const char *name, char **truncated_name)
+{
+ unsigned int type;
+
+ if (strncmp(name, "system.", 7) == 0) {
+ type = GFS2_EATYPE_SYS;
+ if (truncated_name)
+ *truncated_name = strchr(name, '.') + 1;
+ } else if (strncmp(name, "user.", 5) == 0) {
+ type = GFS2_EATYPE_USR;
+ if (truncated_name)
+ *truncated_name = strchr(name, '.') + 1;
+ } else {
+ type = GFS2_EATYPE_UNUSED;
+ if (truncated_name)
+ *truncated_name = NULL;
+ }
+
+ return type;
+}
+
+static int user_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
+{
+ struct inode *inode = ip->i_vnode;
+ int error = permission(inode, MAY_READ, NULL);
+ if (error)
+ return error;
+
+ return gfs2_ea_get_i(ip, er);
+}
+
+static int user_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
+{
+ struct inode *inode = ip->i_vnode;
+
+ if (S_ISREG(inode->i_mode) ||
+ (S_ISDIR(inode->i_mode) && !(inode->i_mode & S_ISVTX))) {
+ int error = permission(inode, MAY_WRITE, NULL);
+ if (error)
+ return error;
+ } else
+ return -EPERM;
+
+ return gfs2_ea_set_i(ip, er);
+}
+
+static int user_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
+{
+ struct inode *inode = ip->i_vnode;
+
+ if (S_ISREG(inode->i_mode) ||
+ (S_ISDIR(inode->i_mode) && !(inode->i_mode & S_ISVTX))) {
+ int error = permission(inode, MAY_WRITE, NULL);
+ if (error)
+ return error;
+ } else
+ return -EPERM;
+
+ return gfs2_ea_remove_i(ip, er);
+}
+
+static int system_eo_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
+{
+ if (!GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len) &&
+ !GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len) &&
+ !capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (ip->i_sbd->sd_args.ar_posix_acl == 0 &&
+ (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len) ||
+ GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)))
+ return -EOPNOTSUPP;
+
+
+
+ return gfs2_ea_get_i(ip, er);
+}
+
+static int system_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
+{
+ int remove = 0;
+ int error;
+
+ if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
+ if (!(er->er_flags & GFS2_ERF_MODE)) {
+ er->er_mode = ip->i_di.di_mode;
+ er->er_flags |= GFS2_ERF_MODE;
+ }
+ error = gfs2_acl_validate_set(ip, 1, er,
+ &remove, &er->er_mode);
+ if (error)
+ return error;
+ error = gfs2_ea_set_i(ip, er);
+ if (error)
+ return error;
+ if (remove)
+ gfs2_ea_remove_i(ip, er);
+ return 0;
+
+ } else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
+ error = gfs2_acl_validate_set(ip, 0, er,
+ &remove, NULL);
+ if (error)
+ return error;
+ if (!remove)
+ error = gfs2_ea_set_i(ip, er);
+ else {
+ error = gfs2_ea_remove_i(ip, er);
+ if (error == -ENODATA)
+ error = 0;
+ }
+ return error;
+ }
+
+ return -EPERM;
+}
+
+static int system_eo_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
+{
+ if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
+ int error = gfs2_acl_validate_remove(ip, 1);
+ if (error)
+ return error;
+
+ } else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
+ int error = gfs2_acl_validate_remove(ip, 0);
+ if (error)
+ return error;
+
+ } else
+ return -EPERM;
+
+ return gfs2_ea_remove_i(ip, er);
+}
+
+struct gfs2_eattr_operations gfs2_user_eaops = {
+ .eo_get = user_eo_get,
+ .eo_set = user_eo_set,
+ .eo_remove = user_eo_remove,
+ .eo_name = "user",
+};
+
+struct gfs2_eattr_operations gfs2_system_eaops = {
+ .eo_get = system_eo_get,
+ .eo_set = system_eo_set,
+ .eo_remove = system_eo_remove,
+ .eo_name = "system",
+};
+
+struct gfs2_eattr_operations *gfs2_ea_ops[] = {
+ NULL,
+ &gfs2_user_eaops,
+ &gfs2_system_eaops,
+};
+