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Diffstat (limited to 'fs/debugfs/inode.c')
-rw-r--r--fs/debugfs/inode.c25
1 files changed, 20 insertions, 5 deletions
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index acef14ad53db..c3638ac81cb6 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -2,8 +2,9 @@
/*
* inode.c - part of debugfs, a tiny little debug file system
*
- * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2004,2019 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (C) 2004 IBM Inc.
+ * Copyright (C) 2019 Linux Foundation <gregkh@linuxfoundation.org>
*
* debugfs is for people to use instead of /proc or /sys.
* See ./Documentation/core-api/kernel-api.rst for more details.
@@ -292,8 +293,10 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
error = simple_pin_fs(&debug_fs_type, &debugfs_mount,
&debugfs_mount_count);
- if (error)
+ if (error) {
+ pr_err("Unable to pin filesystem for file '%s'\n", name);
return ERR_PTR(error);
+ }
/* If the parent is not specified, we create it in the root.
* We need the root dentry to do this, which is in the super
@@ -307,6 +310,7 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
dentry = lookup_one_len(name, parent, strlen(name));
if (!IS_ERR(dentry) && d_really_is_positive(dentry)) {
dput(dentry);
+ pr_err("File '%s' already present!\n", name);
dentry = ERR_PTR(-EEXIST);
}
@@ -349,8 +353,11 @@ static struct dentry *__debugfs_create_file(const char *name, umode_t mode,
return dentry;
inode = debugfs_get_inode(dentry->d_sb);
- if (unlikely(!inode))
+ if (unlikely(!inode)) {
+ pr_err("out of free dentries, can not create file '%s'\n",
+ name);
return failed_creating(dentry);
+ }
inode->i_mode = mode;
inode->i_private = data;
@@ -511,8 +518,11 @@ struct dentry *debugfs_create_dir(const char *name, struct dentry *parent)
return dentry;
inode = debugfs_get_inode(dentry->d_sb);
- if (unlikely(!inode))
+ if (unlikely(!inode)) {
+ pr_err("out of free dentries, can not create directory '%s'\n",
+ name);
return failed_creating(dentry);
+ }
inode->i_mode = S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO;
inode->i_op = &simple_dir_inode_operations;
@@ -550,8 +560,11 @@ struct dentry *debugfs_create_automount(const char *name,
return dentry;
inode = debugfs_get_inode(dentry->d_sb);
- if (unlikely(!inode))
+ if (unlikely(!inode)) {
+ pr_err("out of free dentries, can not create automount '%s'\n",
+ name);
return failed_creating(dentry);
+ }
make_empty_dir_inode(inode);
inode->i_flags |= S_AUTOMOUNT;
@@ -606,6 +619,8 @@ struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
inode = debugfs_get_inode(dentry->d_sb);
if (unlikely(!inode)) {
+ pr_err("out of free dentries, can not create symlink '%s'\n",
+ name);
kfree(link);
return failed_creating(dentry);
}