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debugfs: Remove redundant access mode checks

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debugfs_get_tree() can only be called if debugfs itself calls
simple_pin_fs() or register_filesystem(), and those call paths also
check the access mode.

debugfs_start_creating() checks the access mode so the checks in the
debugfs_create_* functions are unnecessary.

An upcoming change will affect debugfs_allow, so doing this cleanup
first will make that change simpler.

Signed-off-by: Aaron Thompson <dev@aaront.org>
Link: https://patch.msgid.link/20251120102222.18371-2-dev@null.aaront.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aaron Thompson 2025-11-20 10:26:32 +00:00 • committed by Greg Kroah-Hartman
parent ea34511aaf
commit 3ae94a55d0
1 changed files with 0 additions and 18 deletions
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18
fs/debugfs/inode.c
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@ -287,9 +287,6 @@ static int debugfs_get_tree(struct fs_context *fc)
{
int err;
if (!(debugfs_allow & DEBUGFS_ALLOW_API))
return -EPERM;
err = get_tree_single(fc, debugfs_fill_super);
if (err)
return err;
@ -434,11 +431,6 @@ static struct dentry *__debugfs_create_file(const char *name, umode_t mode,
if (IS_ERR(dentry))
return dentry;
if (!(debugfs_allow & DEBUGFS_ALLOW_API)) {
failed_creating(dentry);
return ERR_PTR(-EPERM);
}
inode = debugfs_get_inode(dentry->d_sb);
if (unlikely(!inode)) {
pr_err("out of free dentries, can not create file '%s'\n",
@ -584,11 +576,6 @@ struct dentry *debugfs_create_dir(const char *name, struct dentry *parent)
if (IS_ERR(dentry))
return dentry;
if (!(debugfs_allow & DEBUGFS_ALLOW_API)) {
failed_creating(dentry);
return ERR_PTR(-EPERM);
}
inode = debugfs_get_inode(dentry->d_sb);
if (unlikely(!inode)) {
pr_err("out of free dentries, can not create directory '%s'\n",
@ -631,11 +618,6 @@ struct dentry *debugfs_create_automount(const char *name,
if (IS_ERR(dentry))
return dentry;
if (!(debugfs_allow & DEBUGFS_ALLOW_API)) {
failed_creating(dentry);
return ERR_PTR(-EPERM);
}
inode = debugfs_get_inode(dentry->d_sb);
if (unlikely(!inode)) {
pr_err("out of free dentries, can not create automount '%s'\n",