ovl: make consistent use of OVL_FS()
Always use OVL_FS() to retrieve the corresponding struct ovl_fs from a
struct super_block.
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 618651b..bae404a 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -932,7 +932,7 @@ static int ovl_do_copy_up(struct ovl_copy_up_ctx *c)
static bool ovl_need_meta_copy_up(struct dentry *dentry, umode_t mode,
int flags)
{
- struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
if (!ofs->config.metacopy)
return false;
diff --git a/fs/overlayfs/export.c b/fs/overlayfs/export.c
index 6d54f3f..c8c8588b 100644
--- a/fs/overlayfs/export.c
+++ b/fs/overlayfs/export.c
@@ -183,7 +183,7 @@ static int ovl_connect_layer(struct dentry *dentry)
*/
static int ovl_check_encode_origin(struct dentry *dentry)
{
- struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
bool decodable = ofs->config.nfs_export;
/* Lower file handle for non-upper non-decodable */
@@ -444,7 +444,7 @@ static struct dentry *ovl_lookup_real_inode(struct super_block *sb,
struct dentry *real,
const struct ovl_layer *layer)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
struct dentry *index = NULL;
struct dentry *this = NULL;
struct inode *inode;
@@ -665,7 +665,7 @@ static struct dentry *ovl_get_dentry(struct super_block *sb,
struct ovl_path *lowerpath,
struct dentry *index)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
const struct ovl_layer *layer = upper ? &ofs->layers[0] : lowerpath->layer;
struct dentry *real = upper ?: (index ?: lowerpath->dentry);
@@ -690,7 +690,7 @@ static struct dentry *ovl_get_dentry(struct super_block *sb,
static struct dentry *ovl_upper_fh_to_d(struct super_block *sb,
struct ovl_fh *fh)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
struct dentry *dentry;
struct dentry *upper;
@@ -710,7 +710,7 @@ static struct dentry *ovl_upper_fh_to_d(struct super_block *sb,
static struct dentry *ovl_lower_fh_to_d(struct super_block *sb,
struct ovl_fh *fh)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
struct ovl_path origin = { };
struct ovl_path *stack = &origin;
struct dentry *dentry = NULL;
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index c1c9ff6..b395cd84 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -341,7 +341,7 @@ static const char *ovl_get_link(struct dentry *dentry,
bool ovl_is_private_xattr(struct super_block *sb, const char *name)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
if (ofs->config.userxattr)
return strncmp(name, OVL_XATTR_USER_PREFIX,
@@ -696,7 +696,7 @@ int ovl_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
int ovl_update_time(struct inode *inode, struct timespec64 *ts, int flags)
{
if (flags & S_ATIME) {
- struct ovl_fs *ofs = inode->i_sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(inode->i_sb);
struct path upperpath = {
.mnt = ovl_upper_mnt(ofs),
.dentry = ovl_upperdentry_dereference(OVL_I(inode)),
@@ -1291,7 +1291,7 @@ struct inode *ovl_get_trap_inode(struct super_block *sb, struct dentry *dir)
static bool ovl_hash_bylower(struct super_block *sb, struct dentry *upper,
struct dentry *lower, bool index)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
/* No, if pure upper */
if (!lower)
diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c
index 84c0651..80391c6 100644
--- a/fs/overlayfs/namei.c
+++ b/fs/overlayfs/namei.c
@@ -892,7 +892,7 @@ static int ovl_fix_origin(struct ovl_fs *ofs, struct dentry *dentry,
static int ovl_maybe_validate_verity(struct dentry *dentry)
{
- struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
struct inode *inode = d_inode(dentry);
struct path datapath, metapath;
int err;
@@ -1002,7 +1002,7 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
{
struct ovl_entry *oe = NULL;
const struct cred *old_cred;
- struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
struct ovl_entry *poe = OVL_E(dentry->d_parent);
struct ovl_entry *roe = OVL_E(dentry->d_sb->s_root);
struct ovl_path *stack = NULL, *origin_path = NULL;
diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h
index 5d03f44..edb45754 100644
--- a/fs/overlayfs/ovl_entry.h
+++ b/fs/overlayfs/ovl_entry.h
@@ -117,6 +117,8 @@ static inline struct mnt_idmap *ovl_upper_mnt_idmap(struct ovl_fs *ofs)
return mnt_idmap(ovl_upper_mnt(ofs));
}
+extern struct file_system_type ovl_fs_type;
+
static inline struct ovl_fs *OVL_FS(struct super_block *sb)
{
return (struct ovl_fs *)sb->s_fs_info;
diff --git a/fs/overlayfs/params.c b/fs/overlayfs/params.c
index 3fc01fe..b9355bb 100644
--- a/fs/overlayfs/params.c
+++ b/fs/overlayfs/params.c
@@ -662,7 +662,7 @@ static void ovl_free(struct fs_context *fc)
static int ovl_reconfigure(struct fs_context *fc)
{
struct super_block *sb = fc->root->d_sb;
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
struct super_block *upper_sb;
int ret = 0;
@@ -947,7 +947,7 @@ int ovl_fs_params_verify(const struct ovl_fs_context *ctx,
int ovl_show_options(struct seq_file *m, struct dentry *dentry)
{
struct super_block *sb = dentry->d_sb;
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
size_t nr, nr_merged_lower = ofs->numlayer - ofs->numdatalayer;
const struct ovl_layer *data_layers = &ofs->layers[nr_merged_lower];
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 9107e54..def266b 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -185,7 +185,7 @@ static void ovl_destroy_inode(struct inode *inode)
static void ovl_put_super(struct super_block *sb)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
if (ofs)
ovl_free_fs(ofs);
@@ -194,7 +194,7 @@ static void ovl_put_super(struct super_block *sb)
/* Sync real dirty inodes in upper filesystem (if it exists) */
static int ovl_sync_fs(struct super_block *sb, int wait)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
struct super_block *upper_sb;
int ret;
@@ -1501,7 +1501,7 @@ int ovl_fill_super(struct super_block *sb, struct fs_context *fc)
return err;
}
-static struct file_system_type ovl_fs_type = {
+struct file_system_type ovl_fs_type = {
.owner = THIS_MODULE,
.name = "overlay",
.init_fs_context = ovl_init_fs_context,
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
index 9ebb959..0f38709 100644
--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -19,25 +19,25 @@
int ovl_want_write(struct dentry *dentry)
{
- struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
return mnt_want_write(ovl_upper_mnt(ofs));
}
void ovl_drop_write(struct dentry *dentry)
{
- struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
mnt_drop_write(ovl_upper_mnt(ofs));
}
struct dentry *ovl_workdir(struct dentry *dentry)
{
- struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
return ofs->workdir;
}
const struct cred *ovl_override_creds(struct super_block *sb)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
return override_creds(ofs->creator_cred);
}
@@ -63,7 +63,7 @@ int ovl_can_decode_fh(struct super_block *sb)
struct dentry *ovl_indexdir(struct super_block *sb)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
return ofs->indexdir;
}
@@ -71,7 +71,7 @@ struct dentry *ovl_indexdir(struct super_block *sb)
/* Index all files on copy up. For now only enabled for NFS export */
bool ovl_index_all(struct super_block *sb)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
return ofs->config.nfs_export && ofs->config.index;
}
@@ -79,7 +79,7 @@ bool ovl_index_all(struct super_block *sb)
/* Verify lower origin on lookup. For now only enabled for NFS export */
bool ovl_verify_lower(struct super_block *sb)
{
- struct ovl_fs *ofs = sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(sb);
return ofs->config.nfs_export && ofs->config.index;
}
@@ -204,7 +204,7 @@ enum ovl_path_type ovl_path_type(struct dentry *dentry)
void ovl_path_upper(struct dentry *dentry, struct path *path)
{
- struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
+ struct ovl_fs *ofs = OVL_FS(dentry->d_sb);
path->mnt = ovl_upper_mnt(ofs);
path->dentry = ovl_dentry_upper(dentry);
