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-rw-r--r--fs/overlayfs/overlayfs.h82
1 files changed, 47 insertions, 35 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 225ff1171147..3c5e9f18b0d9 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -86,6 +86,7 @@ struct ovl_fh {
static inline int ovl_do_rmdir(struct inode *dir, struct dentry *dentry)
{
int err = vfs_rmdir(dir, dentry);
+
pr_debug("rmdir(%pd2) = %i\n", dentry, err);
return err;
}
@@ -93,56 +94,52 @@ static inline int ovl_do_rmdir(struct inode *dir, struct dentry *dentry)
static inline int ovl_do_unlink(struct inode *dir, struct dentry *dentry)
{
int err = vfs_unlink(dir, dentry, NULL);
+
pr_debug("unlink(%pd2) = %i\n", dentry, err);
return err;
}
static inline int ovl_do_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *new_dentry, bool debug)
+ struct dentry *new_dentry)
{
int err = vfs_link(old_dentry, dir, new_dentry, NULL);
- if (debug) {
- pr_debug("link(%pd2, %pd2) = %i\n",
- old_dentry, new_dentry, err);
- }
+
+ pr_debug("link(%pd2, %pd2) = %i\n", old_dentry, new_dentry, err);
return err;
}
static inline int ovl_do_create(struct inode *dir, struct dentry *dentry,
- umode_t mode, bool debug)
+ umode_t mode)
{
int err = vfs_create(dir, dentry, mode, true);
- if (debug)
- pr_debug("create(%pd2, 0%o) = %i\n", dentry, mode, err);
+
+ pr_debug("create(%pd2, 0%o) = %i\n", dentry, mode, err);
return err;
}
static inline int ovl_do_mkdir(struct inode *dir, struct dentry *dentry,
- umode_t mode, bool debug)
+ umode_t mode)
{
int err = vfs_mkdir(dir, dentry, mode);
- if (debug)
- pr_debug("mkdir(%pd2, 0%o) = %i\n", dentry, mode, err);
+ pr_debug("mkdir(%pd2, 0%o) = %i\n", dentry, mode, err);
return err;
}
static inline int ovl_do_mknod(struct inode *dir, struct dentry *dentry,
- umode_t mode, dev_t dev, bool debug)
+ umode_t mode, dev_t dev)
{
int err = vfs_mknod(dir, dentry, mode, dev);
- if (debug) {
- pr_debug("mknod(%pd2, 0%o, 0%o) = %i\n",
- dentry, mode, dev, err);
- }
+
+ pr_debug("mknod(%pd2, 0%o, 0%o) = %i\n", dentry, mode, dev, err);
return err;
}
static inline int ovl_do_symlink(struct inode *dir, struct dentry *dentry,
- const char *oldname, bool debug)
+ const char *oldname)
{
int err = vfs_symlink(dir, dentry, oldname);
- if (debug)
- pr_debug("symlink(\"%s\", %pd2) = %i\n", oldname, dentry, err);
+
+ pr_debug("symlink(\"%s\", %pd2) = %i\n", oldname, dentry, err);
return err;
}
@@ -168,11 +165,8 @@ static inline int ovl_do_rename(struct inode *olddir, struct dentry *olddentry,
{
int err;
- pr_debug("rename(%pd2, %pd2, 0x%x)\n",
- olddentry, newdentry, flags);
-
+ pr_debug("rename(%pd2, %pd2, 0x%x)\n", olddentry, newdentry, flags);
err = vfs_rename(olddir, olddentry, newdir, newdentry, NULL, flags);
-
if (err) {
pr_debug("...rename(%pd2, %pd2, ...) = %i\n",
olddentry, newdentry, err);
@@ -202,7 +196,7 @@ void ovl_drop_write(struct dentry *dentry);
struct dentry *ovl_workdir(struct dentry *dentry);
const struct cred *ovl_override_creds(struct super_block *sb);
struct super_block *ovl_same_sb(struct super_block *sb);
-bool ovl_can_decode_fh(struct super_block *sb);
+int ovl_can_decode_fh(struct super_block *sb);
struct dentry *ovl_indexdir(struct super_block *sb);
bool ovl_index_all(struct super_block *sb);
bool ovl_verify_lower(struct super_block *sb);
@@ -215,6 +209,7 @@ void ovl_path_lower(struct dentry *dentry, struct path *path);
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 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);
@@ -263,11 +258,19 @@ static inline bool ovl_is_impuredir(struct dentry *dentry)
return ovl_check_dir_xattr(dentry, OVL_XATTR_IMPURE);
}
+static inline unsigned int ovl_xino_bits(struct super_block *sb)
+{
+ struct ovl_fs *ofs = sb->s_fs_info;
+
+ return ofs->xino_bits;
+}
+
/* namei.c */
int ovl_check_fh_len(struct ovl_fh *fh, int fh_len);
-struct dentry *ovl_decode_fh(struct ovl_fh *fh, struct vfsmount *mnt);
-int ovl_check_origin_fh(struct ovl_fs *ofs, struct ovl_fh *fh,
+struct dentry *ovl_decode_real_fh(struct ovl_fh *fh, struct vfsmount *mnt,
+ bool connected);
+int ovl_check_origin_fh(struct ovl_fs *ofs, struct ovl_fh *fh, bool connected,
struct dentry *upperdentry, struct ovl_path **stackp);
int ovl_verify_set_fh(struct dentry *dentry, const char *name,
struct dentry *real, bool is_upper, bool set);
@@ -325,12 +328,18 @@ int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags);
int ovl_update_time(struct inode *inode, struct timespec *ts, int flags);
bool ovl_is_private_xattr(const char *name);
+struct ovl_inode_params {
+ struct inode *newinode;
+ struct dentry *upperdentry;
+ struct ovl_path *lowerpath;
+ struct dentry *index;
+ unsigned int numlower;
+};
struct inode *ovl_new_inode(struct super_block *sb, umode_t mode, dev_t rdev);
struct inode *ovl_lookup_inode(struct super_block *sb, struct dentry *real,
bool is_upper);
-struct inode *ovl_get_inode(struct super_block *sb, struct dentry *upperdentry,
- struct dentry *lowerdentry, struct dentry *index,
- unsigned int numlower);
+struct inode *ovl_get_inode(struct super_block *sb,
+ struct ovl_inode_params *oip);
static inline void ovl_copyattr(struct inode *from, struct inode *to)
{
to->i_uid = from->i_uid;
@@ -343,25 +352,28 @@ static inline void ovl_copyattr(struct inode *from, struct inode *to)
/* dir.c */
extern const struct inode_operations ovl_dir_inode_operations;
-struct dentry *ovl_lookup_temp(struct dentry *workdir);
int ovl_cleanup_and_whiteout(struct dentry *workdir, struct inode *dir,
struct dentry *dentry);
-struct cattr {
+struct ovl_cattr {
dev_t rdev;
umode_t mode;
const char *link;
+ struct dentry *hardlink;
};
-int ovl_create_real(struct inode *dir, struct dentry *newdentry,
- struct cattr *attr,
- struct dentry *hardlink, bool debug);
+
+#define OVL_CATTR(m) (&(struct ovl_cattr) { .mode = (m) })
+
+struct dentry *ovl_create_real(struct inode *dir, struct dentry *newdentry,
+ struct ovl_cattr *attr);
int ovl_cleanup(struct inode *dir, struct dentry *dentry);
+struct dentry *ovl_create_temp(struct dentry *workdir, struct ovl_cattr *attr);
/* copy_up.c */
int ovl_copy_up(struct dentry *dentry);
int ovl_copy_up_flags(struct dentry *dentry, int flags);
int ovl_copy_xattr(struct dentry *old, struct dentry *new);
int ovl_set_attr(struct dentry *upper, struct kstat *stat);
-struct ovl_fh *ovl_encode_fh(struct dentry *real, bool is_upper);
+struct ovl_fh *ovl_encode_real_fh(struct dentry *real, bool is_upper);
int ovl_set_origin(struct dentry *dentry, struct dentry *lower,
struct dentry *upper);
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