Commit 13464165 authored by Miklos Szeredi's avatar Miklos Szeredi
Browse files

ovl: layer is const 



The ovl_layer struct is never modified except at initialization.

Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
parent b7bf9908

fs/overlayfs/export.c

+6 −6
Original line number Diff line number Diff line
@@ -358,7 +358,7 @@ static struct dentry *ovl_dentry_real_at(struct dentry *dentry, int idx) 
 */

static struct dentry *ovl_lookup_real_one(struct dentry *connected,

					  struct dentry *real,

					  struct ovl_layer *layer)

					  const struct ovl_layer *layer)

{

	struct inode *dir = d_inode(connected);

	struct dentry *this, *parent = NULL;
@@ -414,14 +414,14 @@ fail: 


static struct dentry *ovl_lookup_real(struct super_block *sb,

				      struct dentry *real,

				      struct ovl_layer *layer);

				      const struct ovl_layer *layer);



/*

 * Lookup an indexed or hashed overlay dentry by real inode.

 */

static struct dentry *ovl_lookup_real_inode(struct super_block *sb,

					    struct dentry *real,

					    struct ovl_layer *layer)

					    const struct ovl_layer *layer)

{

	struct ovl_fs *ofs = sb->s_fs_info;

	struct dentry *index = NULL;
@@ -486,7 +486,7 @@ static struct dentry *ovl_lookup_real_inode(struct super_block *sb, 
 */

static struct dentry *ovl_lookup_real_ancestor(struct super_block *sb,

					       struct dentry *real,

					       struct ovl_layer *layer)

					       const struct ovl_layer *layer)

{

	struct dentry *next, *parent = NULL;

	struct dentry *ancestor = ERR_PTR(-EIO);
@@ -539,7 +539,7 @@ static struct dentry *ovl_lookup_real_ancestor(struct super_block *sb, 
 */

static struct dentry *ovl_lookup_real(struct super_block *sb,

				      struct dentry *real,

				      struct ovl_layer *layer)

				      const struct ovl_layer *layer)

{

	struct dentry *connected;

	int err = 0;
@@ -645,7 +645,7 @@ static struct dentry *ovl_get_dentry(struct super_block *sb, 
				     struct dentry *index)

{

	struct ovl_fs *ofs = sb->s_fs_info;

	struct ovl_layer *layer = upper ? &ofs->layers[0] : lowerpath->layer;

	const struct ovl_layer *layer = upper ? &ofs->layers[0] : lowerpath->layer;

	struct dentry *real = upper ?: (index ?: lowerpath->dentry);



	/*

fs/overlayfs/overlayfs.h

+1 −1
Original line number Diff line number Diff line
@@ -239,7 +239,7 @@ enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path); 
struct dentry *ovl_dentry_upper(struct dentry *dentry);

struct dentry *ovl_dentry_lower(struct dentry *dentry);

struct dentry *ovl_dentry_lowerdata(struct dentry *dentry);

struct ovl_layer *ovl_layer_lower(struct dentry *dentry);

const struct ovl_layer *ovl_layer_lower(struct dentry *dentry);

struct dentry *ovl_dentry_real(struct dentry *dentry);

struct dentry *ovl_i_dentry_upper(struct inode *inode);

struct inode *ovl_inode_upper(struct inode *inode);

fs/overlayfs/ovl_entry.h

+2 −2
Original line number Diff line number Diff line
@@ -40,7 +40,7 @@ struct ovl_layer { 
};



struct ovl_path {

	struct ovl_layer *layer;

	const struct ovl_layer *layer;

	struct dentry *dentry;

};
@@ -50,7 +50,7 @@ struct ovl_fs { 
	unsigned int numlayer;

	/* Number of unique fs among layers including upper fs */

	unsigned int numfs;

	struct ovl_layer *layers;

	const struct ovl_layer *layers;

	struct ovl_sb *fs;

	/* workbasedir is the path at workdir= mount option */

	struct dentry *workbasedir;

fs/overlayfs/readdir.c

+1 −1
Original line number Diff line number Diff line
@@ -691,7 +691,7 @@ static int ovl_iterate_real(struct file *file, struct dir_context *ctx) 
	int err;

	struct ovl_dir_file *od = file->private_data;

	struct dentry *dir = file->f_path.dentry;

	struct ovl_layer *lower_layer = ovl_layer_lower(dir);

	const struct ovl_layer *lower_layer = ovl_layer_lower(dir);

	struct ovl_readdir_translate rdt = {

		.ctx.actor = ovl_fill_real,

		.orig_ctx = ctx,

fs/overlayfs/super.c

+12 −11
Original line number Diff line number Diff line
@@ -1320,12 +1320,13 @@ static int ovl_get_layers(struct super_block *sb, struct ovl_fs *ofs, 
{

	int err;

	unsigned int i;

	struct ovl_layer *layers;



	err = -ENOMEM;

	ofs->layers = kcalloc(numlower + 1, sizeof(struct ovl_layer),

			      GFP_KERNEL);

	if (ofs->layers == NULL)

	layers = kcalloc(numlower + 1, sizeof(struct ovl_layer), GFP_KERNEL);

	if (!layers)

		goto out;

	ofs->layers = layers;



	ofs->fs = kcalloc(numlower + 1, sizeof(struct ovl_sb), GFP_KERNEL);

	if (ofs->fs == NULL)
@@ -1334,9 +1335,9 @@ static int ovl_get_layers(struct super_block *sb, struct ovl_fs *ofs, 
	/* idx/fsid 0 are reserved for upper fs even with lower only overlay */

	ofs->numfs++;



	ofs->layers[0].mnt = ofs->upper_mnt;

	ofs->layers[0].idx = 0;

	ofs->layers[0].fsid = 0;

	layers[0].mnt = ofs->upper_mnt;

	layers[0].idx = 0;

	layers[0].fsid = 0;

	ofs->numlayer = 1;



	/*
@@ -1389,11 +1390,11 @@ static int ovl_get_layers(struct super_block *sb, struct ovl_fs *ofs, 
		 */

		mnt->mnt_flags |= MNT_READONLY | MNT_NOATIME;



		ofs->layers[ofs->numlayer].trap = trap;

		ofs->layers[ofs->numlayer].mnt = mnt;

		ofs->layers[ofs->numlayer].idx = ofs->numlayer;

		ofs->layers[ofs->numlayer].fsid = fsid;

		ofs->layers[ofs->numlayer].fs = &ofs->fs[fsid];

		layers[ofs->numlayer].trap = trap;

		layers[ofs->numlayer].mnt = mnt;

		layers[ofs->numlayer].idx = ofs->numlayer;

		layers[ofs->numlayer].fsid = fsid;

		layers[ofs->numlayer].fs = &ofs->fs[fsid];

		ofs->numlayer++;

		ofs->fs[fsid].is_lower = true;

	}

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