From: Steve French <stfrench@microsoft.com>
Date: Mon, 14 Dec 2020 20:08:10 -0600
Subject: [PATCH] cifs: update super_operations to show_devname
Git-commit: 653a5efb849aea1706648257c3c23ece82997f44
Patch-mainline: v5.11-rc1
References: bsc#1192606
This is needed so that we display the correct //server/share vs
\\server\share in /proc/mounts for the device name (in the new
mount API).
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Acked-by: Enzo Matsumiya <ematsumiya@suse.de>
---
fs/cifs/cifsfs.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 4c385eeecc05..a19387fe8b47 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -462,6 +462,25 @@ cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
seq_puts(s, "loose");
}
+/*
+ * cifs_show_devname() is used so we show the mount device name with correct
+ * format (e.g. forward slashes vs. back slashes) in /proc/mounts
+ */
+static int cifs_show_devname(struct seq_file *m, struct dentry *root)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
+ char *devname = kstrdup(cifs_sb->ctx->UNC, GFP_KERNEL);
+
+ if (devname == NULL)
+ seq_puts(m, "none");
+ else {
+ convert_delimiter(devname, '/');
+ seq_puts(m, devname);
+ kfree(devname);
+ }
+ return 0;
+}
+
/*
* cifs_show_options() is for displaying mount options in /proc/mounts.
* Not all settable options are displayed but most of the important
@@ -695,6 +714,8 @@ static const struct super_operations cifs_super_ops = {
.free_inode = cifs_free_inode,
.drop_inode = cifs_drop_inode,
.evict_inode = cifs_evict_inode,
+/* .show_path = cifs_show_path, */ /* Would we ever need show path? */
+ .show_devname = cifs_show_devname,
/* .delete_inode = cifs_delete_inode, */ /* Do not need above
function unless later we add lazy close of inodes or unless the
kernel forgets to call us with the same number of releases (closes)
--
2.33.1