kill boilerplate around posix_acl_chmod_masq()

new helper: posix_acl_chmod(&acl, gfp, mode).  Replaces acl with modified
clone or with NULL if that has failed; returns 0 or -ve on error.  All
callers of posix_acl_chmod_masq() switched to that - they'd been doing
exactly the same thing.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

14 files changed, 139 insertions, 168 deletions

diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index df4d7a171d7f..d7211e28c0d1 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -162,21 +162,18 @@ err_free_out:
 int v9fs_acl_chmod(struct dentry *dentry)
 {
         int retval = 0;
-        struct posix_acl *acl, *clone;
+        struct posix_acl *acl;
         struct inode *inode = dentry->d_inode;
 
         if (S_ISLNK(inode->i_mode))
                 return -EOPNOTSUPP;
         acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS);
         if (acl) {
-                clone = posix_acl_clone(acl, GFP_KERNEL);
+                retval = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+                if (retval)
+                        return retval;
+                retval = v9fs_set_acl(dentry, ACL_TYPE_ACCESS, acl);
                 posix_acl_release(acl);
-                if (!clone)
-                        return -ENOMEM;
-                retval = posix_acl_chmod_masq(clone, inode->i_mode);
-                if (!retval)
-                        retval = v9fs_set_acl(dentry, ACL_TYPE_ACCESS, clone);
-                posix_acl_release(clone);
         }
         return retval;
 }
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index c13ea9fbf36b..88bca53b302a 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -272,7 +272,7 @@ failed:
 
 int btrfs_acl_chmod(struct inode *inode)
 {
-        struct posix_acl *acl, *clone;
+        struct posix_acl *acl;
         int ret = 0;
 
         if (S_ISLNK(inode->i_mode))
@@ -285,17 +285,11 @@ int btrfs_acl_chmod(struct inode *inode)
         if (IS_ERR_OR_NULL(acl))
                 return PTR_ERR(acl);
 
-        clone = posix_acl_clone(acl, GFP_KERNEL);
+        ret = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+        if (ret)
+                return ret;
+        ret = btrfs_set_acl(NULL, inode, acl, ACL_TYPE_ACCESS);
         posix_acl_release(acl);
-        if (!clone)
-                return -ENOMEM;
-
-        ret = posix_acl_chmod_masq(clone, inode->i_mode);
-        if (!ret)
-                ret = btrfs_set_acl(NULL, inode, clone, ACL_TYPE_ACCESS);
-
-        posix_acl_release(clone);
-
         return ret;
 }
 
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index ced1c478ebdb..1226dbcc66f5 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -316,7 +316,7 @@ cleanup:
 int
 ext2_acl_chmod(struct inode *inode)
 {
-        struct posix_acl *acl, *clone;
+        struct posix_acl *acl;
         int error;
 
         if (!test_opt(inode->i_sb, POSIX_ACL))
@@ -326,14 +326,11 @@ ext2_acl_chmod(struct inode *inode)
         acl = ext2_get_acl(inode, ACL_TYPE_ACCESS);
         if (IS_ERR(acl) || !acl)
                 return PTR_ERR(acl);
-        clone = posix_acl_clone(acl, GFP_KERNEL);
+        error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+        if (error)
+                return error;
+        error = ext2_set_acl(inode, ACL_TYPE_ACCESS, acl);
         posix_acl_release(acl);
-        if (!clone)
-                return -ENOMEM;
-        error = posix_acl_chmod_masq(clone, inode->i_mode);
-        if (!error)
-                error = ext2_set_acl(inode, ACL_TYPE_ACCESS, clone);
-        posix_acl_release(clone);
         return error;
 }
 
diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
index 5326038e8536..7ea638acaecf 100644
--- a/fs/ext3/acl.c
+++ b/fs/ext3/acl.c
@@ -326,7 +326,9 @@ cleanup:
 int
 ext3_acl_chmod(struct inode *inode)
 {
-        struct posix_acl *acl, *clone;
+        struct posix_acl *acl;
+        handle_t *handle;
+        int retries = 0;
         int error;
 
         if (S_ISLNK(inode->i_mode))
@@ -336,31 +338,24 @@ ext3_acl_chmod(struct inode *inode)
         acl = ext3_get_acl(inode, ACL_TYPE_ACCESS);
         if (IS_ERR(acl) || !acl)
                 return PTR_ERR(acl);
-        clone = posix_acl_clone(acl, GFP_KERNEL);
-        posix_acl_release(acl);
-        if (!clone)
-                return -ENOMEM;
-        error = posix_acl_chmod_masq(clone, inode->i_mode);
-        if (!error) {
-                handle_t *handle;
-                int retries = 0;
-
-        retry:
-                handle = ext3_journal_start(inode,
-                                EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
-                if (IS_ERR(handle)) {
-                        error = PTR_ERR(handle);
-                        ext3_std_error(inode->i_sb, error);
-                        goto out;
-                }
-                error = ext3_set_acl(handle, inode, ACL_TYPE_ACCESS, clone);
-                ext3_journal_stop(handle);
-                if (error == -ENOSPC &&
-                    ext3_should_retry_alloc(inode->i_sb, &retries))
-                        goto retry;
+        error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+        if (error)
+                return error;
+retry:
+        handle = ext3_journal_start(inode,
+                        EXT3_DATA_TRANS_BLOCKS(inode->i_sb));
+        if (IS_ERR(handle)) {
+                error = PTR_ERR(handle);
+                ext3_std_error(inode->i_sb, error);
+                goto out;
         }
+        error = ext3_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
+        ext3_journal_stop(handle);
+        if (error == -ENOSPC &&
+            ext3_should_retry_alloc(inode->i_sb, &retries))
+                goto retry;
 out:
-        posix_acl_release(clone);
+        posix_acl_release(acl);
         return error;
 }
 
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 4cd9e2e4085e..e38a2047d246 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -324,9 +324,12 @@ cleanup:
 int
 ext4_acl_chmod(struct inode *inode)
 {
-        struct posix_acl *acl, *clone;
+        struct posix_acl *acl;
+        handle_t *handle;
+        int retries = 0;
         int error;
 
+
         if (S_ISLNK(inode->i_mode))
                 return -EOPNOTSUPP;
         if (!test_opt(inode->i_sb, POSIX_ACL))
@@ -334,31 +337,24 @@ ext4_acl_chmod(struct inode *inode)
         acl = ext4_get_acl(inode, ACL_TYPE_ACCESS);
         if (IS_ERR(acl) || !acl)
                 return PTR_ERR(acl);
-        clone = posix_acl_clone(acl, GFP_KERNEL);
-        posix_acl_release(acl);
-        if (!clone)
-                return -ENOMEM;
-        error = posix_acl_chmod_masq(clone, inode->i_mode);
-        if (!error) {
-                handle_t *handle;
-                int retries = 0;
-
-        retry:
-                handle = ext4_journal_start(inode,
-                                EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
-                if (IS_ERR(handle)) {
-                        error = PTR_ERR(handle);
-                        ext4_std_error(inode->i_sb, error);
-                        goto out;
-                }
-                error = ext4_set_acl(handle, inode, ACL_TYPE_ACCESS, clone);
-                ext4_journal_stop(handle);
-                if (error == -ENOSPC &&
-                    ext4_should_retry_alloc(inode->i_sb, &retries))
-                        goto retry;
+        error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+        if (error)
+                return error;
+retry:
+        handle = ext4_journal_start(inode,
+                        EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
+        if (IS_ERR(handle)) {
+                error = PTR_ERR(handle);
+                ext4_std_error(inode->i_sb, error);
+                goto out;
         }
+        error = ext4_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
+        ext4_journal_stop(handle);
+        if (error == -ENOSPC &&
+            ext4_should_retry_alloc(inode->i_sb, &retries))
+                goto retry;
 out:
-        posix_acl_release(clone);
+        posix_acl_release(acl);
         return error;
 }
 
diff --git a/fs/generic_acl.c b/fs/generic_acl.c
index 4949473d3542..3a60d9d1653c 100644
--- a/fs/generic_acl.c
+++ b/fs/generic_acl.c
@@ -170,21 +170,18 @@ cleanup:
 int
 generic_acl_chmod(struct inode *inode)
 {
-        struct posix_acl *acl, *clone;
+        struct posix_acl *acl;
         int error = 0;
 
         if (S_ISLNK(inode->i_mode))
                 return -EOPNOTSUPP;
         acl = get_cached_acl(inode, ACL_TYPE_ACCESS);
         if (acl) {
-                clone = posix_acl_clone(acl, GFP_KERNEL);
+                error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+                if (error)
+                        return error;
+                set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
                 posix_acl_release(acl);
-                if (!clone)
-                        return -ENOMEM;
-                error = posix_acl_chmod_masq(clone, inode->i_mode);
-                if (!error)
-                        set_cached_acl(inode, ACL_TYPE_ACCESS, clone);
-                posix_acl_release(clone);
         }
         return error;
 }
diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index 48171f4c943d..160d4e1575ce 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -187,7 +187,7 @@ out:
 
 int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr)
 {
-        struct posix_acl *acl, *clone;
+        struct posix_acl *acl;
         char *data;
         unsigned int len;
         int error;
@@ -198,25 +198,19 @@ int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr)
         if (!acl)
                 return gfs2_setattr_simple(ip, attr);
 
-        clone = posix_acl_clone(acl, GFP_NOFS);
+        error = posix_acl_chmod(&acl, GFP_NOFS, attr->ia_mode);
+        if (error)
+                return error;
+
+        len = posix_acl_to_xattr(acl, NULL, 0);
+        data = kmalloc(len, GFP_NOFS);
         error = -ENOMEM;
-        if (!clone)
+        if (data == NULL)
                 goto out;
-        posix_acl_release(acl);
-        acl = clone;
-
-        error = posix_acl_chmod_masq(acl, attr->ia_mode);
-        if (!error) {
-                len = posix_acl_to_xattr(acl, NULL, 0);
-                data = kmalloc(len, GFP_NOFS);
-                error = -ENOMEM;
-                if (data == NULL)
-                        goto out;
-                posix_acl_to_xattr(acl, data, len);
-                error = gfs2_xattr_acl_chmod(ip, attr, data);
-                kfree(data);
-                set_cached_acl(&ip->i_inode, ACL_TYPE_ACCESS, acl);
-        }
+        posix_acl_to_xattr(acl, data, len);
+        error = gfs2_xattr_acl_chmod(ip, attr, data);
+        kfree(data);
+        set_cached_acl(&ip->i_inode, ACL_TYPE_ACCESS, acl);
 
 out:
         posix_acl_release(acl);
diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c
index 4933a8f8ecc9..71d022d38508 100644
--- a/fs/jffs2/acl.c
+++ b/fs/jffs2/acl.c
@@ -332,7 +332,7 @@ int jffs2_init_acl_post(struct inode *inode)
 
 int jffs2_acl_chmod(struct inode *inode)
 {
-        struct posix_acl *acl, *clone;
+        struct posix_acl *acl;
         int rc;
 
         if (S_ISLNK(inode->i_mode))
@@ -340,14 +340,11 @@ int jffs2_acl_chmod(struct inode *inode)
         acl = jffs2_get_acl(inode, ACL_TYPE_ACCESS);
         if (IS_ERR(acl) || !acl)
                 return PTR_ERR(acl);
-        clone = posix_acl_clone(acl, GFP_KERNEL);
+        rc = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+        if (rc)
+                return rc;
+        rc = jffs2_set_acl(inode, ACL_TYPE_ACCESS, acl);
         posix_acl_release(acl);
-        if (!clone)
-                return -ENOMEM;
-        rc = posix_acl_chmod_masq(clone, inode->i_mode);
-        if (!rc)
-                rc = jffs2_set_acl(inode, ACL_TYPE_ACCESS, clone);
-        posix_acl_release(clone);
         return rc;
 }
 
diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c
index ead200eef5e4..89ced71e225a 100644
--- a/fs/jfs/acl.c
+++ b/fs/jfs/acl.c
@@ -177,8 +177,9 @@ cleanup:
 
 int jfs_acl_chmod(struct inode *inode)
 {
-        struct posix_acl *acl, *clone;
+        struct posix_acl *acl;
         int rc;
+        tid_t tid;
 
         if (S_ISLNK(inode->i_mode))
                 return -EOPNOTSUPP;
@@ -187,22 +188,18 @@ int jfs_acl_chmod(struct inode *inode)
         if (IS_ERR(acl) || !acl)
                 return PTR_ERR(acl);
 
-        clone = posix_acl_clone(acl, GFP_KERNEL);
-        posix_acl_release(acl);
-        if (!clone)
-                return -ENOMEM;
-
-        rc = posix_acl_chmod_masq(clone, inode->i_mode);
-        if (!rc) {
-                tid_t tid = txBegin(inode->i_sb, 0);
-                mutex_lock(&JFS_IP(inode)->commit_mutex);
-                rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, clone);
-                if (!rc)
-                        rc = txCommit(tid, 1, &inode, 0);
-                txEnd(tid);
-                mutex_unlock(&JFS_IP(inode)->commit_mutex);
-        }
+        rc = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+        if (rc)
+                return rc;
 
-        posix_acl_release(clone);
+        tid = txBegin(inode->i_sb, 0);
+        mutex_lock(&JFS_IP(inode)->commit_mutex);
+        rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
+        if (!rc)
+                rc = txCommit(tid, 1, &inode, 0);
+        txEnd(tid);
+        mutex_unlock(&JFS_IP(inode)->commit_mutex);
+
+        posix_acl_release(acl);
         return rc;
 }
diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c
index aff23e59b58c..dd0296ade181 100644
--- a/fs/ocfs2/acl.c
+++ b/fs/ocfs2/acl.c
@@ -327,7 +327,7 @@ int ocfs2_check_acl(struct inode *inode, int mask)
 int ocfs2_acl_chmod(struct inode *inode)
 {
         struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-        struct posix_acl *acl, *clone;
+        struct posix_acl *acl;
         int ret;
 
         if (S_ISLNK(inode->i_mode))
@@ -339,15 +339,12 @@ int ocfs2_acl_chmod(struct inode *inode)
         acl = ocfs2_get_acl(inode, ACL_TYPE_ACCESS);
         if (IS_ERR(acl) || !acl)
                 return PTR_ERR(acl);
-        clone = posix_acl_clone(acl, GFP_KERNEL);
+        ret = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+        if (ret)
+                return ret;
+        ret = ocfs2_set_acl(NULL, inode, NULL, ACL_TYPE_ACCESS,
+                            acl, NULL, NULL);
         posix_acl_release(acl);
-        if (!clone)
-                return -ENOMEM;
-        ret = posix_acl_chmod_masq(clone, inode->i_mode);
-        if (!ret)
-                ret = ocfs2_set_acl(NULL, inode, NULL, ACL_TYPE_ACCESS,
-                                    clone, NULL, NULL);
-        posix_acl_release(clone);
         return ret;
 }
 
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index b1cf6bf4b41d..0aa9f1676726 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -386,3 +386,21 @@ posix_acl_chmod_masq(struct posix_acl *acl, mode_t mode)
 
         return 0;
 }
+
+int
+posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, mode_t mode)
+{
+        struct posix_acl *clone = posix_acl_clone(*acl, gfp);
+        int err = -ENOMEM;
+        if (clone) {
+                err = posix_acl_chmod_masq(clone, mode);
+                if (err) {
+                        posix_acl_release(clone);
+                        clone = NULL;
+                }
+        }
+        posix_acl_release(*acl);
+        *acl = clone;
+        return err;
+}
+EXPORT_SYMBOL(posix_acl_chmod);
diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
index 3dc38f1206fc..26b08acf913f 100644
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@@ -445,7 +445,10 @@ int reiserfs_cache_default_acl(struct inode *inode)
 
 int reiserfs_acl_chmod(struct inode *inode)
 {
-        struct posix_acl *acl, *clone;
+        struct reiserfs_transaction_handle th;
+        struct posix_acl *acl;
+        size_t size;
+        int depth;
         int error;
 
         if (S_ISLNK(inode->i_mode))
@@ -463,30 +466,22 @@ int reiserfs_acl_chmod(struct inode *inode)
                 return 0;
         if (IS_ERR(acl))
                 return PTR_ERR(acl);
-        clone = posix_acl_clone(acl, GFP_NOFS);
-        posix_acl_release(acl);
-        if (!clone)
-                return -ENOMEM;
-        error = posix_acl_chmod_masq(clone, inode->i_mode);
+        error = posix_acl_chmod(&acl, GFP_NOFS, inode->i_mode);
+        if (error)
+                return error;
+
+        size = reiserfs_xattr_nblocks(inode, reiserfs_acl_size(acl->a_count));
+        depth = reiserfs_write_lock_once(inode->i_sb);
+        error = journal_begin(&th, inode->i_sb, size * 2);
         if (!error) {
-                struct reiserfs_transaction_handle th;
-                size_t size = reiserfs_xattr_nblocks(inode,
-                                             reiserfs_acl_size(clone->a_count));
-                int depth;
-
-                depth = reiserfs_write_lock_once(inode->i_sb);
-                error = journal_begin(&th, inode->i_sb, size * 2);
-                if (!error) {
-                        int error2;
-                        error = reiserfs_set_acl(&th, inode, ACL_TYPE_ACCESS,
-                                                 clone);
-                        error2 = journal_end(&th, inode->i_sb, size * 2);
-                        if (error2)
-                                error = error2;
-                }
-                reiserfs_write_unlock_once(inode->i_sb, depth);
+                int error2;
+                error = reiserfs_set_acl(&th, inode, ACL_TYPE_ACCESS, acl);
+                error2 = journal_end(&th, inode->i_sb, size * 2);
+                if (error2)
+                        error = error2;
         }
-        posix_acl_release(clone);
+        reiserfs_write_unlock_once(inode->i_sb, depth);
+        posix_acl_release(acl);
         return error;
 }
 
diff --git a/fs/xfs/linux-2.6/xfs_acl.c b/fs/xfs/linux-2.6/xfs_acl.c
index 13c4e4fd5c6e..4c554122db02 100644
--- a/fs/xfs/linux-2.6/xfs_acl.c
+++ b/fs/xfs/linux-2.6/xfs_acl.c
@@ -326,7 +326,7 @@ xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl)
 int
 xfs_acl_chmod(struct inode *inode)
 {
-        struct posix_acl *acl, *clone;
+        struct posix_acl *acl;
         int error;
 
         if (S_ISLNK(inode->i_mode))
@@ -336,16 +336,12 @@ xfs_acl_chmod(struct inode *inode)
         if (IS_ERR(acl) || !acl)
                 return PTR_ERR(acl);
 
-        clone = posix_acl_clone(acl, GFP_KERNEL);
-        posix_acl_release(acl);
-        if (!clone)
-                return -ENOMEM;
-
-        error = posix_acl_chmod_masq(clone, inode->i_mode);
-        if (!error)
-                error = xfs_set_acl(inode, ACL_TYPE_ACCESS, clone);
+        error = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+        if (error)
+                return error;
 
-        posix_acl_release(clone);
+        error = xfs_set_acl(inode, ACL_TYPE_ACCESS, acl);
+        posix_acl_release(acl);
         return error;
 }
 
diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h
index 54211c1cd926..7a74d37482e8 100644
--- a/include/linux/posix_acl.h
+++ b/include/linux/posix_acl.h
@@ -80,6 +80,7 @@ extern struct posix_acl *posix_acl_from_mode(mode_t, gfp_t);
 extern int posix_acl_equiv_mode(const struct posix_acl *, mode_t *);
 extern int posix_acl_create_masq(struct posix_acl *, mode_t *);
 extern int posix_acl_chmod_masq(struct posix_acl *, mode_t);
+extern int posix_acl_chmod(struct posix_acl **, gfp_t, mode_t);
 
 extern struct posix_acl *get_posix_acl(struct inode *, int);
 extern int set_posix_acl(struct inode *, int, struct posix_acl *);