diff options
| -rw-r--r-- | fs/overlayfs/copy_up.c | 14 | ||||
| -rw-r--r-- | fs/overlayfs/inode.c | 33 | ||||
| -rw-r--r-- | fs/overlayfs/overlayfs.h | 3 |
3 files changed, 13 insertions, 37 deletions
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c index 6c3aaf45e9cf..e8cacf7a8dcc 100644 --- a/fs/overlayfs/copy_up.c +++ b/fs/overlayfs/copy_up.c @@ -324,8 +324,8 @@ out_cleanup: * 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); @@ -378,7 +378,7 @@ out_unlock: return err; } -int ovl_copy_up(struct dentry *dentry) +int ovl_copy_up_flags(struct dentry *dentry, int flags) { int err = 0; const struct cred *old_cred = ovl_override_creds(dentry->d_sb); @@ -408,6 +408,9 @@ 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); @@ -418,3 +421,8 @@ int ovl_copy_up(struct dentry *dentry) return err; } + +int ovl_copy_up(struct dentry *dentry) +{ + return ovl_copy_up_flags(dentry, 0); +} diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index a10e948d24fa..1ab8b0dbc237 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_flags(dentry, file_flags); ovl_drop_write(dentry); } } diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index a83de5d5b8a0..e07aa7b0ddb7 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -219,7 +219,6 @@ 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_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); |
