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| author | Miklos Szeredi <mszeredi@suse.cz> | 2014-12-13 00:59:42 +0100 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@suse.cz> | 2014-12-13 00:59:42 +0100 |
| commit | 1afaba1ecb5299cdd0f69b5bad98b0185fe71e79 (patch) | |
| tree | 19b3bdd7c514de98a9131665fcb360fda3178d4e /fs/overlayfs/super.c | |
| parent | 49c21e1cacd74a8c83407c70ad860c994e606e25 (diff) | |
| download | op-kernel-dev-1afaba1ecb5299cdd0f69b5bad98b0185fe71e79.zip op-kernel-dev-1afaba1ecb5299cdd0f69b5bad98b0185fe71e79.tar.gz | |
ovl: make path-type a bitmap
OVL_PATH_PURE_UPPER -> __OVL_PATH_UPPER | __OVL_PATH_PURE
OVL_PATH_UPPER -> __OVL_PATH_UPPER
OVL_PATH_MERGE -> __OVL_PATH_UPPER | __OVL_PATH_MERGE
OVL_PATH_LOWER -> 0
Multiple R/O layers will allow __OVL_PATH_MERGE without __OVL_PATH_UPPER.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Diffstat (limited to 'fs/overlayfs/super.c')
| -rw-r--r-- | fs/overlayfs/super.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index f16d318..821719c 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -64,22 +64,19 @@ const char *ovl_opaque_xattr = "trusted.overlay.opaque"; enum ovl_path_type ovl_path_type(struct dentry *dentry) { struct ovl_entry *oe = dentry->d_fsdata; + enum ovl_path_type type = 0; if (oe->__upperdentry) { + type = __OVL_PATH_UPPER; + if (oe->lowerdentry) { if (S_ISDIR(dentry->d_inode->i_mode)) - return OVL_PATH_MERGE; - else - return OVL_PATH_UPPER; - } else { - if (oe->opaque) - return OVL_PATH_UPPER; - else - return OVL_PATH_PURE_UPPER; + type |= __OVL_PATH_MERGE; + } else if (!oe->opaque) { + type |= __OVL_PATH_PURE; } - } else { - return OVL_PATH_LOWER; } + return type; } static struct dentry *ovl_upperdentry_dereference(struct ovl_entry *oe) @@ -101,7 +98,7 @@ enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path) enum ovl_path_type type = ovl_path_type(dentry); - if (type == OVL_PATH_LOWER) + if (!OVL_TYPE_UPPER(type)) ovl_path_lower(dentry, path); else ovl_path_upper(dentry, path); |
