diff options
Diffstat (limited to 'fs/overlayfs/overlayfs.h')
| -rw-r--r-- | fs/overlayfs/overlayfs.h | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 05e9acfe1590..80c10228bd64 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -58,6 +58,13 @@ enum ovl_entry_flag { }; enum { + OVL_REDIRECT_OFF, /* "off" mode is never used. In effect */ + OVL_REDIRECT_FOLLOW, /* ...it translates to either "follow" */ + OVL_REDIRECT_NOFOLLOW, /* ...or "nofollow". */ + OVL_REDIRECT_ON, +}; + +enum { OVL_XINO_OFF, OVL_XINO_AUTO, OVL_XINO_ON, @@ -352,17 +359,6 @@ static inline bool ovl_open_flags_need_copy_up(int flags) return ((OPEN_FMODE(flags) & FMODE_WRITE) || (flags & O_TRUNC)); } -static inline bool ovl_allow_offline_changes(struct ovl_fs *ofs) -{ - /* - * To avoid regressions in existing setups with overlay lower offline - * changes, we allow lower changes only if none of the new features - * are used. - */ - return (!ofs->config.index && !ofs->config.metacopy && - !ofs->config.redirect_dir && ofs->config.xino != OVL_XINO_ON); -} - /* util.c */ int ovl_want_write(struct dentry *dentry); @@ -421,7 +417,6 @@ bool ovl_dentry_needs_data_copy_up(struct dentry *dentry, int flags); bool ovl_dentry_needs_data_copy_up_locked(struct dentry *dentry, int flags); bool ovl_has_upperdata(struct inode *inode); void ovl_set_upperdata(struct inode *inode); -bool ovl_redirect_dir(struct super_block *sb); const char *ovl_dentry_get_redirect(struct dentry *dentry); void ovl_dentry_set_redirect(struct dentry *dentry, const char *redirect); void ovl_inode_update(struct inode *inode, struct dentry *upperdentry); @@ -489,6 +484,16 @@ static inline bool ovl_is_impuredir(struct super_block *sb, return ovl_path_check_dir_xattr(ofs, &upperpath, OVL_XATTR_IMPURE); } +static inline bool ovl_redirect_follow(struct ovl_fs *ofs) +{ + return ofs->config.redirect_mode != OVL_REDIRECT_NOFOLLOW; +} + +static inline bool ovl_redirect_dir(struct ovl_fs *ofs) +{ + return ofs->config.redirect_mode == OVL_REDIRECT_ON; +} + /* * With xino=auto, we do best effort to keep all inodes on same st_dev and * d_ino consistent with st_ino. @@ -499,6 +504,16 @@ static inline bool ovl_xino_warn(struct ovl_fs *ofs) return ofs->config.xino == OVL_XINO_ON; } +/* + * To avoid regressions in existing setups with overlay lower offline changes, + * we allow lower changes only if none of the new features are used. + */ +static inline bool ovl_allow_offline_changes(struct ovl_fs *ofs) +{ + return (!ofs->config.index && !ofs->config.metacopy && + !ovl_redirect_dir(ofs) && !ovl_xino_warn(ofs)); +} + /* All layers on same fs? */ static inline bool ovl_same_fs(struct ovl_fs *ofs) { |