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-rw-r--r--fs/overlayfs/copy_up.c5
-rw-r--r--fs/overlayfs/dir.c31
-rw-r--r--fs/overlayfs/namei.c20
-rw-r--r--fs/overlayfs/overlayfs.h15
-rw-r--r--fs/overlayfs/super.c5
-rw-r--r--fs/overlayfs/util.c42
6 files changed, 60 insertions, 58 deletions
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 843ed2a2d7db..7a44533f4bbf 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -459,6 +459,11 @@ static int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
ovl_path_upper(parent, &parentpath);
upperdir = parentpath.dentry;
+ /* Mark parent "impure" because it may now contain non-pure upper */
+ err = ovl_set_impure(parent, upperdir);
+ if (err)
+ return err;
+
err = vfs_getattr(&parentpath, &pstat,
STATX_ATIME | STATX_MTIME, AT_STATX_SYNC_AS_STAT);
if (err)
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index f2a118ba00e4..a63a71656e9b 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -149,22 +149,6 @@ static int ovl_set_opaque(struct dentry *dentry, struct dentry *upperdentry)
return ovl_set_opaque_xerr(dentry, upperdentry, -EIO);
}
-static int ovl_set_impure(struct dentry *dentry, struct dentry *upperdentry)
-{
- int err;
-
- /*
- * Do not fail when upper doesn't support xattrs.
- * Upper inodes won't have origin nor redirect xattr anyway.
- */
- err = ovl_check_setxattr(dentry, upperdentry, OVL_XATTR_IMPURE,
- "y", 1, 0);
- if (!err)
- ovl_dentry_set_impure(dentry);
-
- return err;
-}
-
/* Common operations required to be done after creation of file on upper */
static void ovl_instantiate(struct dentry *dentry, struct inode *inode,
struct dentry *newdentry, bool hardlink)
@@ -976,21 +960,16 @@ static int ovl_rename(struct inode *olddir, struct dentry *old,
if (!samedir) {
/*
* When moving a merge dir or non-dir with copy up origin into
- * a non-merge upper dir (a.k.a pure upper dir), we are making
- * the target parent dir "impure". ovl_iterate() iterates pure
- * upper dirs directly, because there is no need to filter out
- * whiteouts and merge dir content with lower dir. But for the
- * case of an "impure" upper dir, ovl_iterate() cannot iterate
- * the real directory directly, because it looks for the inode
- * numbers to fill d_ino in the entries origin inode.
+ * a new parent, we are marking the new parent dir "impure".
+ * When ovl_iterate() iterates an "impure" upper dir, it will
+ * lookup the origin inodes of the entries to fill d_ino.
*/
- if (ovl_type_origin(old) && !ovl_type_merge(new->d_parent)) {
+ if (ovl_type_origin(old)) {
err = ovl_set_impure(new->d_parent, new_upperdir);
if (err)
goto out_revert_creds;
}
- if (!overwrite && ovl_type_origin(new) &&
- !ovl_type_merge(old->d_parent)) {
+ if (!overwrite && ovl_type_origin(new)) {
err = ovl_set_impure(old->d_parent, old_upperdir);
if (err)
goto out_revert_creds;
diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c
index 0c72a5909db2..f3136c31e72a 100644
--- a/fs/overlayfs/namei.c
+++ b/fs/overlayfs/namei.c
@@ -167,31 +167,11 @@ invalid:
goto out;
}
-static bool ovl_check_dir_xattr(struct dentry *dentry, const char *name)
-{
- int res;
- char val;
-
- if (!d_is_dir(dentry))
- return false;
-
- res = vfs_getxattr(dentry, name, &val, 1);
- if (res == 1 && val == 'y')
- return true;
-
- return false;
-}
-
static bool ovl_is_opaquedir(struct dentry *dentry)
{
return ovl_check_dir_xattr(dentry, OVL_XATTR_OPAQUE);
}
-static bool ovl_is_impuredir(struct dentry *dentry)
-{
- return ovl_check_dir_xattr(dentry, OVL_XATTR_IMPURE);
-}
-
static int ovl_lookup_single(struct dentry *base, struct ovl_lookup_data *d,
const char *name, unsigned int namelen,
size_t prelen, const char *post,
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index a9fb958fd5d4..0623cebeefff 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -207,7 +207,6 @@ bool ovl_dentry_is_opaque(struct dentry *dentry);
bool ovl_dentry_is_impure(struct dentry *dentry);
bool ovl_dentry_is_whiteout(struct dentry *dentry);
void ovl_dentry_set_opaque(struct dentry *dentry);
-void ovl_dentry_set_impure(struct dentry *dentry);
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);
@@ -221,6 +220,17 @@ bool ovl_is_whiteout(struct dentry *dentry);
struct file *ovl_path_open(struct path *path, int flags);
int ovl_copy_up_start(struct dentry *dentry);
void ovl_copy_up_end(struct dentry *dentry);
+bool ovl_check_dir_xattr(struct dentry *dentry, const char *name);
+int ovl_check_setxattr(struct dentry *dentry, struct dentry *upperdentry,
+ const char *name, const void *value, size_t size,
+ int xerr);
+int ovl_set_impure(struct dentry *dentry, struct dentry *upperdentry);
+
+static inline bool ovl_is_impuredir(struct dentry *dentry)
+{
+ return ovl_check_dir_xattr(dentry, OVL_XATTR_IMPURE);
+}
+
/* namei.c */
int ovl_path_next(int idx, struct dentry *dentry, struct path *path);
@@ -281,6 +291,3 @@ 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);
-int ovl_check_setxattr(struct dentry *dentry, struct dentry *upperdentry,
- const char *name, const void *value, size_t size,
- int xerr);
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index f1647626a882..4882ffb37bae 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -974,7 +974,10 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
path_put(&workpath);
kfree(lowertmp);
- oe->__upperdentry = upperpath.dentry;
+ if (upperpath.dentry) {
+ oe->__upperdentry = upperpath.dentry;
+ oe->impure = ovl_is_impuredir(upperpath.dentry);
+ }
for (i = 0; i < numlower; i++) {
oe->lowerstack[i].dentry = stack[i].dentry;
oe->lowerstack[i].mnt = ufs->lower_mnt[i];
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
index e0dfb07d5457..809048913889 100644
--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -194,13 +194,6 @@ void ovl_dentry_set_opaque(struct dentry *dentry)
oe->opaque = true;
}
-void ovl_dentry_set_impure(struct dentry *dentry)
-{
- struct ovl_entry *oe = dentry->d_fsdata;
-
- oe->impure = true;
-}
-
bool ovl_redirect_dir(struct super_block *sb)
{
struct ovl_fs *ofs = sb->s_fs_info;
@@ -311,6 +304,21 @@ void ovl_copy_up_end(struct dentry *dentry)
spin_unlock(&ofs->copyup_wq.lock);
}
+bool ovl_check_dir_xattr(struct dentry *dentry, const char *name)
+{
+ int res;
+ char val;
+
+ if (!d_is_dir(dentry))
+ return false;
+
+ res = vfs_getxattr(dentry, name, &val, 1);
+ if (res == 1 && val == 'y')
+ return true;
+
+ return false;
+}
+
int ovl_check_setxattr(struct dentry *dentry, struct dentry *upperdentry,
const char *name, const void *value, size_t size,
int xerr)
@@ -331,3 +339,23 @@ int ovl_check_setxattr(struct dentry *dentry, struct dentry *upperdentry,
return err;
}
+
+int ovl_set_impure(struct dentry *dentry, struct dentry *upperdentry)
+{
+ int err;
+ struct ovl_entry *oe = dentry->d_fsdata;
+
+ if (oe->impure)
+ return 0;
+
+ /*
+ * Do not fail when upper doesn't support xattrs.
+ * Upper inodes won't have origin nor redirect xattr anyway.
+ */
+ err = ovl_check_setxattr(dentry, upperdentry, OVL_XATTR_IMPURE,
+ "y", 1, 0);
+ if (!err)
+ oe->impure = true;
+
+ return err;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 07:36:43 +0000