[PATCH 11/27] VFS: Remove unused code after filesystem context changes [ver #5]
From: David Howells
Date: Wed Jun 14 2017 - 11:17:13 EST
Remove code that is now unused after the filesystem context changes.
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
---
fs/internal.h | 2 --
fs/super.c | 53 ---------------------------------------------
include/linux/lsm_hooks.h | 2 --
include/linux/security.h | 6 -----
security/security.c | 5 ----
security/selinux/hooks.c | 22 +------------------
6 files changed, 1 insertion(+), 89 deletions(-)
diff --git a/fs/internal.h b/fs/internal.h
index 08d7816f8686..da679deec12f 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -89,8 +89,6 @@ extern struct file *get_empty_filp(void);
*/
extern int do_remount_sb(struct super_block *, int, void *, int, struct fs_context *);
extern bool trylock_super(struct super_block *sb);
-extern struct dentry *mount_fs(struct file_system_type *,
- int, const char *, void *);
extern struct super_block *user_get_super(dev_t);
/*
diff --git a/fs/super.c b/fs/super.c
index 8ef5222d6932..3a83e783a5d2 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1326,59 +1326,6 @@ struct dentry *mount_single(struct file_system_type *fs_type,
}
EXPORT_SYMBOL(mount_single);
-struct dentry *
-mount_fs(struct file_system_type *type, int flags, const char *name, void *data)
-{
- struct dentry *root;
- struct super_block *sb;
- char *secdata = NULL;
- int error = -ENOMEM;
-
- if (data && !(type->fs_flags & FS_BINARY_MOUNTDATA)) {
- secdata = alloc_secdata();
- if (!secdata)
- goto out;
-
- error = security_sb_copy_data(data, secdata);
- if (error)
- goto out_free_secdata;
- }
-
- root = type->mount(type, flags, name, data);
- if (IS_ERR(root)) {
- error = PTR_ERR(root);
- goto out_free_secdata;
- }
- sb = root->d_sb;
- BUG_ON(!sb);
- WARN_ON(!sb->s_bdi);
- sb->s_flags |= SB_BORN;
-
- error = security_sb_kern_mount(sb, flags, secdata);
- if (error)
- goto out_sb;
-
- /*
- * filesystems should never set s_maxbytes larger than MAX_LFS_FILESIZE
- * but s_maxbytes was an unsigned long long for many releases. Throw
- * this warning for a little while to try and catch filesystems that
- * violate this rule.
- */
- WARN((sb->s_maxbytes < 0), "%s set sb->s_maxbytes to "
- "negative value (%lld)\n", type->name, sb->s_maxbytes);
-
- up_write(&sb->s_umount);
- free_secdata(secdata);
- return root;
-out_sb:
- dput(root);
- deactivate_locked_super(sb);
-out_free_secdata:
- free_secdata(secdata);
-out:
- return ERR_PTR(error);
-}
-
/*
* Setup private BDI for given superblock. It gets automatically cleaned up
* in generic_shutdown_super().
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 62500658cc9f..9bddbb28a2fc 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -1415,7 +1415,6 @@ union security_list_options {
void (*sb_free_security)(struct super_block *sb);
int (*sb_copy_data)(char *orig, char *copy);
int (*sb_remount)(struct super_block *sb, void *data);
- int (*sb_kern_mount)(struct super_block *sb, int flags, void *data);
int (*sb_show_options)(struct seq_file *m, struct super_block *sb);
int (*sb_statfs)(struct dentry *dentry);
int (*sb_mount)(const char *dev_name, const struct path *path,
@@ -1732,7 +1731,6 @@ struct security_hook_heads {
struct list_head sb_free_security;
struct list_head sb_copy_data;
struct list_head sb_remount;
- struct list_head sb_kern_mount;
struct list_head sb_show_options;
struct list_head sb_statfs;
struct list_head sb_mount;
diff --git a/include/linux/security.h b/include/linux/security.h
index e7c774fdffd9..26b4de453ead 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -235,7 +235,6 @@ int security_sb_alloc(struct super_block *sb);
void security_sb_free(struct super_block *sb);
int security_sb_copy_data(char *orig, char *copy);
int security_sb_remount(struct super_block *sb, void *data);
-int security_sb_kern_mount(struct super_block *sb, int flags, void *data);
int security_sb_show_options(struct seq_file *m, struct super_block *sb);
int security_sb_statfs(struct dentry *dentry);
int security_sb_mount(const char *dev_name, const struct path *path,
@@ -571,11 +570,6 @@ static inline int security_sb_remount(struct super_block *sb, void *data)
return 0;
}
-static inline int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
-{
- return 0;
-}
-
static inline int security_sb_show_options(struct seq_file *m,
struct super_block *sb)
{
diff --git a/security/security.c b/security/security.c
index 27b195966cad..c2aa121a8ca4 100644
--- a/security/security.c
+++ b/security/security.c
@@ -367,11 +367,6 @@ int security_sb_remount(struct super_block *sb, void *data)
return call_int_hook(sb_remount, 0, sb, data);
}
-int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
-{
- return call_int_hook(sb_kern_mount, 0, sb, flags, data);
-}
-
int security_sb_show_options(struct seq_file *m, struct super_block *sb)
{
return call_int_hook(sb_show_options, 0, m, sb);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index c93a21119fe3..f146087a608d 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2775,25 +2775,6 @@ static int selinux_sb_remount(struct super_block *sb, void *data)
goto out_free_opts;
}
-static int selinux_sb_kern_mount(struct super_block *sb, int flags, void *data)
-{
- const struct cred *cred = current_cred();
- struct common_audit_data ad;
- int rc;
-
- rc = superblock_doinit(sb, data);
- if (rc)
- return rc;
-
- /* Allow all mounts performed by the kernel */
- if (flags & SB_KERNMOUNT)
- return 0;
-
- ad.type = LSM_AUDIT_DATA_DENTRY;
- ad.u.dentry = sb->s_root;
- return superblock_has_perm(cred, sb, FILESYSTEM__MOUNT, &ad);
-}
-
static int selinux_sb_statfs(struct dentry *dentry)
{
const struct cred *cred = current_cred();
@@ -2978,7 +2959,7 @@ static int selinux_sb_get_tree(struct fs_context *fc)
return rc;
/* Allow all mounts performed by the kernel */
- if (fc->sb_flags & MS_KERNMOUNT)
+ if (fc->sb_flags & SB_KERNMOUNT)
return 0;
ad.type = LSM_AUDIT_DATA_DENTRY;
@@ -6339,7 +6320,6 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(sb_free_security, selinux_sb_free_security),
LSM_HOOK_INIT(sb_copy_data, selinux_sb_copy_data),
LSM_HOOK_INIT(sb_remount, selinux_sb_remount),
- LSM_HOOK_INIT(sb_kern_mount, selinux_sb_kern_mount),
LSM_HOOK_INIT(sb_show_options, selinux_sb_show_options),
LSM_HOOK_INIT(sb_statfs, selinux_sb_statfs),
LSM_HOOK_INIT(sb_mount, selinux_mount),