Signed-off-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
---
fs/cifs/cifsfs.c | 2 +-
fs/cifs/fs_context.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++---
fs/cifs/fs_context.h | 2 +-
3 files changed, 54 insertions(+), 5 deletions(-)
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 80117e9d35f9..13d7f4a3c836 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -490,7 +490,7 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
if (tcon->no_lease)
seq_puts(s, ",nolease");
- if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
+ if (cifs_sb->ctx->multiuser)
seq_puts(s, ",multiuser");
else if (tcon->ses->user_name)
seq_show_option(s, "username", tcon->ses->user_name);
diff --git a/fs/cifs/fs_context.c b/fs/cifs/fs_context.c
index edfdea129fcc..542fa75b74aa 100644
--- a/fs/cifs/fs_context.c
+++ b/fs/cifs/fs_context.c
@@ -629,10 +629,53 @@ static int smb3_verify_reconfigure_ctx(struct smb3_fs_context *new_ctx,
cifs_dbg(VFS, "can not change sec during remount\n");
return -EINVAL;
}
+ if (new_ctx->multiuser != old_ctx->multiuser) {
+ cifs_dbg(VFS, "can not change multiuser during remount\n");
+ return -EINVAL;
+ }
+ if (new_ctx->UNC &&
+ (!old_ctx->UNC || strcmp(new_ctx->UNC, old_ctx->UNC))) {
+ cifs_dbg(VFS, "can not change UNC during remount\n");
+ return -EINVAL;
+ }
+ if (new_ctx->username &&
+ (!old_ctx->username || strcmp(new_ctx->username, old_ctx->username))) {
+ cifs_dbg(VFS, "can not change username during remount\n");
+ return -EINVAL;
+ }
+ if (new_ctx->password &&
+ (!old_ctx->password || strcmp(new_ctx->password, old_ctx->password))) {
+ cifs_dbg(VFS, "can not change password during remount\n");
+ return -EINVAL;
+ }
+ if (new_ctx->domainname &&
+ (!old_ctx->domainname || strcmp(new_ctx->domainname, old_ctx->domainname))) {
+ cifs_dbg(VFS, "can not change domainname during remount\n");
+ return -EINVAL;
+ }
+ if (new_ctx->nodename &&
+ (!old_ctx->nodename || strcmp(new_ctx->nodename, old_ctx->nodename))) {
+ cifs_dbg(VFS, "can not change nodename during remount\n");
+ return -EINVAL;
+ }
+ if (new_ctx->iocharset &&
+ (!old_ctx->iocharset || strcmp(new_ctx->iocharset, old_ctx->iocharset))) {
+ cifs_dbg(VFS, "can not change iocharset during remount\n");
+ return -EINVAL;
+ }
return 0;
}
+#define STEAL_STRING(cifs_sb, ctx, field) \
+do { \
+ if (ctx->field) { \
+ kfree(ctx->field); \
+ ctx->field = cifs_sb->ctx->field; \
+ cifs_sb->ctx->field = NULL; \
+ } \
+} while (0)
+
static int smb3_reconfigure(struct fs_context *fc)
{
struct smb3_fs_context *ctx = smb3_fc2context(fc);
@@ -645,10 +688,16 @@ static int smb3_reconfigure(struct fs_context *fc)
return rc;
/*
- * Steal the UNC from the old and to be destroyed context.
+ * We can not change UNC/username/password/domainname/nodename/iocharset
+ * during reconnect so ignore what we have in the new context and
+ * just use what we already have in cifs_sb->ctx.
*/
- ctx->UNC = cifs_sb->ctx->UNC;
- cifs_sb->ctx->UNC = NULL;
+ STEAL_STRING(cifs_sb, ctx, UNC);
+ STEAL_STRING(cifs_sb, ctx, username);
+ STEAL_STRING(cifs_sb, ctx, password);
+ STEAL_STRING(cifs_sb, ctx, domainname);
+ STEAL_STRING(cifs_sb, ctx, nodename);
+ STEAL_STRING(cifs_sb, ctx, iocharset);
smb3_cleanup_fs_context_contents(cifs_sb->ctx);
rc = smb3_fs_context_dup(cifs_sb->ctx, ctx);
diff --git a/fs/cifs/fs_context.h b/fs/cifs/fs_context.h
index aa1d952fd5ce..62f5a8d98df6 100644
--- a/fs/cifs/fs_context.h
+++ b/fs/cifs/fs_context.h
@@ -148,7 +148,6 @@ struct smb3_fs_context {
bool uid_specified;
bool gid_specified;
bool sloppy;
- char *nodename;
bool got_ip;
bool got_version;
bool got_rsize;
@@ -160,6 +159,7 @@ struct smb3_fs_context {
char *password;
char *domainname;
char *UNC;
+ char *nodename;
char *iocharset; /* local code page for mapping to and from Unicode */
char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
--
2.13.6
