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authorAmir Goldstein <amir73il@gmail.com>2018-01-14 18:25:31 +0100
committerMiklos Szeredi <mszeredi@redhat.com>2018-01-24 11:25:58 +0100
commitc62520a83bceae0bb0b7b3de10c3e81205cd3823 (patch)
treef94b1fca8653e0a659d729859b188a74caaebaec /fs/overlayfs/util.c
parentovl: copy up of disconnected dentries (diff)
downloadlinux-c62520a83bceae0bb0b7b3de10c3e81205cd3823.tar.xz
linux-c62520a83bceae0bb0b7b3de10c3e81205cd3823.zip
ovl: store 'has_upper' and 'opaque' as bit flags
We need to make some room in struct ovl_entry to store information about redirected ancestors for NFS export, so cram two booleans as bit flags. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs/util.c')
-rw-r--r--fs/overlayfs/util.c30
1 files changed, 19 insertions, 11 deletions
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
index 68541eb5be8e..930784a26623 100644
--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -210,10 +210,24 @@ void ovl_set_dir_cache(struct inode *inode, struct ovl_dir_cache *cache)
OVL_I(inode)->cache = cache;
}
+void ovl_dentry_set_flag(unsigned long flag, struct dentry *dentry)
+{
+ set_bit(flag, &OVL_E(dentry)->flags);
+}
+
+void ovl_dentry_clear_flag(unsigned long flag, struct dentry *dentry)
+{
+ clear_bit(flag, &OVL_E(dentry)->flags);
+}
+
+bool ovl_dentry_test_flag(unsigned long flag, struct dentry *dentry)
+{
+ return test_bit(flag, &OVL_E(dentry)->flags);
+}
+
bool ovl_dentry_is_opaque(struct dentry *dentry)
{
- struct ovl_entry *oe = dentry->d_fsdata;
- return oe->opaque;
+ return ovl_dentry_test_flag(OVL_E_OPAQUE, dentry);
}
bool ovl_dentry_is_whiteout(struct dentry *dentry)
@@ -223,9 +237,7 @@ bool ovl_dentry_is_whiteout(struct dentry *dentry)
void ovl_dentry_set_opaque(struct dentry *dentry)
{
- struct ovl_entry *oe = dentry->d_fsdata;
-
- oe->opaque = true;
+ ovl_dentry_set_flag(OVL_E_OPAQUE, dentry);
}
/*
@@ -236,16 +248,12 @@ void ovl_dentry_set_opaque(struct dentry *dentry)
*/
bool ovl_dentry_has_upper_alias(struct dentry *dentry)
{
- struct ovl_entry *oe = dentry->d_fsdata;
-
- return oe->has_upper;
+ return ovl_dentry_test_flag(OVL_E_UPPER_ALIAS, dentry);
}
void ovl_dentry_set_upper_alias(struct dentry *dentry)
{
- struct ovl_entry *oe = dentry->d_fsdata;
-
- oe->has_upper = true;
+ ovl_dentry_set_flag(OVL_E_UPPER_ALIAS, dentry);
}
bool ovl_redirect_dir(struct super_block *sb)