ovl: struct cattr cleanups

* Rename to ovl_cattr

* Fold ovl_create_real() hardlink argument into struct ovl_cattr

* Create macro OVL_CATTR() to initialize struct ovl_cattr from mode

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index a8273dec0fb83ebda42aa4c95e1bbbb9cd09346d..5f4c78b1bbeba394b1f5992821287ef4f61f96fd 100644 (file)
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -486,7 +486,7 @@ static int ovl_get_tmpfile(struct ovl_copy_up_ctx *c, struct dentry **tempp)
        struct dentry *temp;
        const struct cred *old_creds = NULL;
        struct cred *new_creds = NULL;
-       struct cattr cattr = {
+       struct ovl_cattr cattr = {
                /* Can't properly set mode on creation because of the umask */
                .mode = c->stat.mode & S_IFMT,
                .rdev = c->stat.rdev,
@@ -509,8 +509,7 @@ static int ovl_get_tmpfile(struct ovl_copy_up_ctx *c, struct dentry **tempp)
                if (IS_ERR(temp))
                        goto temp_err;
 
-               err = ovl_create_real(d_inode(c->workdir), temp, &cattr,
-                                     NULL);
+               err = ovl_create_real(d_inode(c->workdir), temp, &cattr);
                if (err) {
                        dput(temp);
                        goto out;

diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 4d431a3f7a0ad2d17e8e4398bc259a0bc7cc486c..0fb3ef85f298afded589c0f6c7dee7275500b5d6 100644 (file)
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -115,15 +115,15 @@ kill_whiteout:
 }
 
 int ovl_create_real(struct inode *dir, struct dentry *newdentry,
-                   struct cattr *attr, struct dentry *hardlink)
+                   struct ovl_cattr *attr)
 {
        int err;
 
        if (newdentry->d_inode)
                return -ESTALE;
 
-       if (hardlink) {
-               err = ovl_do_link(hardlink, dir, newdentry);
+       if (attr->hardlink) {
+               err = ovl_do_link(attr->hardlink, dir, newdentry);
        } else {
                switch (attr->mode & S_IFMT) {
                case S_IFREG:
@@ -213,14 +213,14 @@ static bool ovl_type_origin(struct dentry *dentry)
 }
 
 static int ovl_create_upper(struct dentry *dentry, struct inode *inode,
-                           struct cattr *attr, struct dentry *hardlink)
+                           struct ovl_cattr *attr)
 {
        struct dentry *upperdir = ovl_dentry_upper(dentry->d_parent);
        struct inode *udir = upperdir->d_inode;
        struct dentry *newdentry;
        int err;
 
-       if (!hardlink && !IS_POSIXACL(udir))
+       if (!attr->hardlink && !IS_POSIXACL(udir))
                attr->mode &= ~current_umask();
 
        inode_lock_nested(udir, I_MUTEX_PARENT);
@@ -229,7 +229,7 @@ static int ovl_create_upper(struct dentry *dentry, struct inode *inode,
        err = PTR_ERR(newdentry);
        if (IS_ERR(newdentry))
                goto out_unlock;
-       err = ovl_create_real(udir, newdentry, attr, hardlink);
+       err = ovl_create_real(udir, newdentry, attr);
        if (err)
                goto out_dput;
 
@@ -238,7 +238,7 @@ static int ovl_create_upper(struct dentry *dentry, struct inode *inode,
                ovl_set_opaque(dentry, newdentry);
        }
 
-       ovl_instantiate(dentry, inode, newdentry, !!hardlink);
+       ovl_instantiate(dentry, inode, newdentry, !!attr->hardlink);
        newdentry = NULL;
 out_dput:
        dput(newdentry);
@@ -285,8 +285,7 @@ static struct dentry *ovl_clear_empty(struct dentry *dentry,
        if (IS_ERR(opaquedir))
                goto out_unlock;
 
-       err = ovl_create_real(wdir, opaquedir,
-                             &(struct cattr){.mode = stat.mode}, NULL);
+       err = ovl_create_real(wdir, opaquedir, OVL_CATTR(stat.mode));
        if (err)
                goto out_dput;
 
@@ -354,8 +353,7 @@ out_free:
 }
 
 static int ovl_create_over_whiteout(struct dentry *dentry, struct inode *inode,
-                                   struct cattr *cattr,
-                                   struct dentry *hardlink)
+                                   struct ovl_cattr *cattr)
 {
        struct dentry *workdir = ovl_workdir(dentry);
        struct inode *wdir = workdir->d_inode;
@@ -365,6 +363,7 @@ static int ovl_create_over_whiteout(struct dentry *dentry, struct inode *inode,
        struct dentry *newdentry;
        int err;
        struct posix_acl *acl, *default_acl;
+       bool hardlink = !!cattr->hardlink;
 
        if (WARN_ON(!workdir))
                return -EROFS;
@@ -391,7 +390,7 @@ static int ovl_create_over_whiteout(struct dentry *dentry, struct inode *inode,
        if (IS_ERR(upper))
                goto out_dput;
 
-       err = ovl_create_real(wdir, newdentry, cattr, hardlink);
+       err = ovl_create_real(wdir, newdentry, cattr);
        if (err)
                goto out_dput2;
 
@@ -439,7 +438,7 @@ static int ovl_create_over_whiteout(struct dentry *dentry, struct inode *inode,
                if (err)
                        goto out_cleanup;
        }
-       ovl_instantiate(dentry, inode, newdentry, !!hardlink);
+       ovl_instantiate(dentry, inode, newdentry, hardlink);
        newdentry = NULL;
 out_dput2:
        dput(upper);
@@ -460,8 +459,7 @@ out_cleanup:
 }
 
 static int ovl_create_or_link(struct dentry *dentry, struct inode *inode,
-                             struct cattr *attr, struct dentry *hardlink,
-                             bool origin)
+                             struct ovl_cattr *attr, bool origin)
 {
        int err;
        const struct cred *old_cred;
@@ -489,7 +487,7 @@ static int ovl_create_or_link(struct dentry *dentry, struct inode *inode,
        if (override_cred) {
                override_cred->fsuid = inode->i_uid;
                override_cred->fsgid = inode->i_gid;
-               if (!hardlink) {
+               if (!attr->hardlink) {
                        err = security_dentry_create_files_as(dentry,
                                        attr->mode, &dentry->d_name, old_cred,
                                        override_cred);
@@ -502,11 +500,9 @@ static int ovl_create_or_link(struct dentry *dentry, struct inode *inode,
                put_cred(override_cred);
 
                if (!ovl_dentry_is_whiteout(dentry))
-                       err = ovl_create_upper(dentry, inode, attr,
-                                               hardlink);
+                       err = ovl_create_upper(dentry, inode, attr);
                else
-                       err = ovl_create_over_whiteout(dentry, inode, attr,
-                                                       hardlink);
+                       err = ovl_create_over_whiteout(dentry, inode, attr);
        }
 out_revert_creds:
        revert_creds(old_cred);
@@ -518,7 +514,7 @@ static int ovl_create_object(struct dentry *dentry, int mode, dev_t rdev,
 {
        int err;
        struct inode *inode;
-       struct cattr attr = {
+       struct ovl_cattr attr = {
                .rdev = rdev,
                .link = link,
        };
@@ -535,7 +531,7 @@ static int ovl_create_object(struct dentry *dentry, int mode, dev_t rdev,
        inode_init_owner(inode, dentry->d_parent->d_inode, mode);
        attr.mode = inode->i_mode;
 
-       err = ovl_create_or_link(dentry, inode, &attr, NULL, false);
+       err = ovl_create_or_link(dentry, inode, &attr, false);
        if (err)
                iput(inode);
 
@@ -594,8 +590,9 @@ static int ovl_link(struct dentry *old, struct inode *newdir,
        inode = d_inode(old);
        ihold(inode);
 
-       err = ovl_create_or_link(new, inode, NULL, ovl_dentry_upper(old),
-                                ovl_type_origin(old));
+       err = ovl_create_or_link(new, inode,
+                       &(struct ovl_cattr) {.hardlink = ovl_dentry_upper(old)},
+                       ovl_type_origin(old));
        if (err)
                iput(inode);
 

diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 1c30d60cc290b8e183a7392d50aec58f00cd15af..aa8286419133c392cabff229abf5a23d6ceab928 100644 (file)
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -349,14 +349,17 @@ extern const struct inode_operations ovl_dir_inode_operations;
 struct dentry *ovl_lookup_temp(struct dentry *workdir);
 int ovl_cleanup_and_whiteout(struct dentry *workdir, struct inode *dir,
                             struct dentry *dentry);
-struct cattr {
+struct ovl_cattr {
        dev_t rdev;
        umode_t mode;
        const char *link;
+       struct dentry *hardlink;
 };
+
+#define OVL_CATTR(m) (&(struct ovl_cattr) { .mode = (m) })
+
 int ovl_create_real(struct inode *dir, struct dentry *newdentry,
-                   struct cattr *attr,
-                   struct dentry *hardlink);
+                   struct ovl_cattr *attr);
 int ovl_cleanup(struct inode *dir, struct dentry *dentry);
 
 /* copy_up.c */

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 94a7a654b0b88fa3f652eca1b9abb68ab3f23ddb..286d36772e9c64a1b85d55d646193c9bd712f311 100644 (file)
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -611,9 +611,7 @@ retry:
                        goto retry;
                }
 
-               err = ovl_create_real(dir, work,
-                                     &(struct cattr){.mode = S_IFDIR | 0},
-                                     NULL);
+               err = ovl_create_real(dir, work, OVL_CATTR(attr.ia_mode));
                if (err)
                        goto out_dput;