This removes code duplication and is prep work
for fixing up copy up locking.
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
---
fs/overlayfs/copy_up.c | 19 ++++++++++++++++---
fs/overlayfs/inode.c | 33 +--------------------------------
fs/overlayfs/overlayfs.h | 3 +--
3 files changed, 18 insertions(+), 37 deletions(-)
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 7e67512..a16127b 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -336,8 +336,8 @@ static int ovl_copy_up_locked(struct dentry *workdir, struct dentry *upperdir,
* d_parent it is possible that the copy up will lock the old parent. At
* that point the file will have already been copied up anyway.
*/
-int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
- struct path *lowerpath, struct kstat *stat)
+static int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
+ struct path *lowerpath, struct kstat *stat)
{
DEFINE_DELAYED_CALL(done);
struct dentry *workdir = ovl_workdir(dentry);
@@ -391,7 +391,7 @@ int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
return err;
}
-int ovl_copy_up(struct dentry *dentry)
+static int __ovl_copy_up(struct dentry *dentry, int flags)
{
int err = 0;
const struct cred *old_cred = ovl_override_creds(dentry->d_sb);
@@ -419,6 +419,9 @@ int ovl_copy_up(struct dentry *dentry)
ovl_path_lower(next, &lowerpath);
err = vfs_getattr(&lowerpath, &stat);
+ /* maybe truncate regular file. this has no effect on dirs */
+ if (flags & O_TRUNC)
+ stat.size = 0;
if (!err)
err = ovl_copy_up_one(parent, next, &lowerpath, &stat);
@@ -429,3 +432,13 @@ int ovl_copy_up(struct dentry *dentry)
return err;
}
+
+int ovl_copy_up(struct dentry *dentry)
+{
+ return __ovl_copy_up(dentry, 0);
+}
+
+int ovl_copy_up_open(struct dentry *dentry, int flags)
+{
+ return __ovl_copy_up(dentry, flags);
+}
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index a10e948..7abae00 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -13,34 +13,6 @@
#include <linux/posix_acl.h>
#include "overlayfs.h"
-static int ovl_copy_up_truncate(struct dentry *dentry)
-{
- int err;
- struct dentry *parent;
- struct kstat stat;
- struct path lowerpath;
- const struct cred *old_cred;
-
- parent = dget_parent(dentry);
- err = ovl_copy_up(parent);
- if (err)
- goto out_dput_parent;
-
- ovl_path_lower(dentry, &lowerpath);
-
- old_cred = ovl_override_creds(dentry->d_sb);
- err = vfs_getattr(&lowerpath, &stat);
- if (!err) {
- stat.size = 0;
- err = ovl_copy_up_one(parent, dentry, &lowerpath, &stat);
- }
- revert_creds(old_cred);
-
-out_dput_parent:
- dput(parent);
- return err;
-}
-
int ovl_setattr(struct dentry *dentry, struct iattr *attr)
{
int err;
@@ -281,10 +253,7 @@ int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags)
if (ovl_open_need_copy_up(file_flags, type, realpath.dentry)) {
err = ovl_want_write(dentry);
if (!err) {
- if (file_flags & O_TRUNC)
- err = ovl_copy_up_truncate(dentry);
- else
- err = ovl_copy_up(dentry);
+ err = ovl_copy_up_open(dentry, file_flags);
ovl_drop_write(dentry);
}
}
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 421fd50..1a2f9a5 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -215,7 +215,6 @@ void ovl_cleanup(struct inode *dir, struct dentry *dentry);
/* copy_up.c */
int ovl_copy_up(struct dentry *dentry);
-int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
- struct path *lowerpath, struct kstat *stat);
+int ovl_copy_up_open(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);
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe linux-unionfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
