kill boilerplates around posix_acl_create_masq()
Al Viro [Sat, 23 Jul 2011 07:10:32 +0000 (03:10 -0400)]
new helper: posix_acl_create(&acl, gfp, mode_p).  Replaces acl with
modified clone, on failure releases acl and replaces with NULL.
Returns 0 or -ve on error.  All callers of posix_acl_create_masq()
switched.

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

16 files changed:
fs/9p/acl.c
fs/btrfs/acl.c
fs/ext2/acl.c
fs/ext3/acl.c
fs/ext4/acl.c
fs/generic_acl.c
fs/gfs2/acl.c
fs/jffs2/acl.c
fs/jfs/acl.c
fs/nfs/nfs3acl.c
fs/ocfs2/acl.c
fs/posix_acl.c
fs/reiserfs/xattr_acl.c
fs/xfs/linux-2.6/xfs_acl.c
fs/xfs/linux-2.6/xfs_iops.c
include/linux/posix_acl.h

index d7211e2..075bc90 100644 (file)
@@ -206,30 +206,18 @@ int v9fs_acl_mode(struct inode *dir, mode_t *modep,
                        mode &= ~current_umask();
        }
        if (acl) {
-               struct posix_acl *clone;
-
                if (S_ISDIR(mode))
                        *dpacl = posix_acl_dup(acl);
-               clone = posix_acl_clone(acl, GFP_NOFS);
-               posix_acl_release(acl);
-               if (!clone)
-                       return -ENOMEM;
-
-               retval = posix_acl_create_masq(clone, &mode);
-               if (retval < 0) {
-                       posix_acl_release(clone);
-                       goto cleanup;
-               }
+               retval = posix_acl_create(&acl, GFP_NOFS, &mode);
+               if (retval < 0)
+                       return retval;
                if (retval > 0)
-                       *pacl = clone;
+                       *pacl = acl;
                else
-                       posix_acl_release(clone);
+                       posix_acl_release(acl);
        }
        *modep  = mode;
        return 0;
-cleanup:
-       return retval;
-
 }
 
 static int v9fs_remote_get_acl(struct dentry *dentry, const char *name,
index 88bca53..9508ad1 100644 (file)
@@ -238,8 +238,7 @@ int btrfs_init_acl(struct btrfs_trans_handle *trans,
        }
 
        if (IS_POSIXACL(dir) && acl) {
-               struct posix_acl *clone;
-               mode_t mode;
+               mode_t mode = inode->i_mode;
 
                if (S_ISDIR(inode->i_mode)) {
                        ret = btrfs_set_acl(trans, inode, acl,
@@ -247,22 +246,15 @@ int btrfs_init_acl(struct btrfs_trans_handle *trans,
                        if (ret)
                                goto failed;
                }
-               clone = posix_acl_clone(acl, GFP_NOFS);
-               ret = -ENOMEM;
-               if (!clone)
-                       goto failed;
+               ret = posix_acl_create(&acl, GFP_NOFS, &mode);
+               if (ret < 0)
+                       return ret;
 
-               mode = inode->i_mode;
-               ret = posix_acl_create_masq(clone, &mode);
-               if (ret >= 0) {
-                       inode->i_mode = mode;
-                       if (ret > 0) {
-                               /* we need an acl */
-                               ret = btrfs_set_acl(trans, inode, clone,
-                                                   ACL_TYPE_ACCESS);
-                       }
+               inode->i_mode = mode;
+               if (ret > 0) {
+                       /* we need an acl */
+                       ret = btrfs_set_acl(trans, inode, acl, ACL_TYPE_ACCESS);
                }
-               posix_acl_release(clone);
        }
 failed:
        posix_acl_release(acl);
index 1226dbc..ba99fa4 100644 (file)
@@ -270,29 +270,20 @@ ext2_init_acl(struct inode *inode, struct inode *dir)
                        inode->i_mode &= ~current_umask();
        }
        if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
-               struct posix_acl *clone;
-              mode_t mode;
-
+               mode_t mode = inode->i_mode;
                if (S_ISDIR(inode->i_mode)) {
                        error = ext2_set_acl(inode, ACL_TYPE_DEFAULT, acl);
                        if (error)
                                goto cleanup;
                }
-               clone = posix_acl_clone(acl, GFP_KERNEL);
-               error = -ENOMEM;
-               if (!clone)
-                       goto cleanup;
-               mode = inode->i_mode;
-               error = posix_acl_create_masq(clone, &mode);
-               if (error >= 0) {
-                       inode->i_mode = mode;
-                       if (error > 0) {
-                               /* This is an extended ACL */
-                               error = ext2_set_acl(inode,
-                                                    ACL_TYPE_ACCESS, clone);
-                       }
+               error = posix_acl_create(&acl, GFP_KERNEL, &mode);
+               if (error < 0)
+                       return error;
+               inode->i_mode = mode;
+               if (error > 0) {
+                       /* This is an extended ACL */
+                       error = ext2_set_acl(inode, ACL_TYPE_ACCESS, acl);
                }
-               posix_acl_release(clone);
        }
 cleanup:
        posix_acl_release(acl);
index 7ea638a..a9fdd77 100644 (file)
@@ -278,8 +278,7 @@ ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
                        inode->i_mode &= ~current_umask();
        }
        if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
-               struct posix_acl *clone;
-               mode_t mode;
+               mode_t mode = inode->i_mode;
 
                if (S_ISDIR(inode->i_mode)) {
                        error = ext3_set_acl(handle, inode,
@@ -287,22 +286,15 @@ ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
                        if (error)
                                goto cleanup;
                }
-               clone = posix_acl_clone(acl, GFP_NOFS);
-               error = -ENOMEM;
-               if (!clone)
-                       goto cleanup;
-
-               mode = inode->i_mode;
-               error = posix_acl_create_masq(clone, &mode);
-               if (error >= 0) {
-                       inode->i_mode = mode;
-                       if (error > 0) {
-                               /* This is an extended ACL */
-                               error = ext3_set_acl(handle, inode,
-                                                    ACL_TYPE_ACCESS, clone);
-                       }
+               error = posix_acl_create(&acl, GFP_NOFS, &mode);
+               if (error < 0)
+                       return error;
+
+               inode->i_mode = mode;
+               if (error > 0) {
+                       /* This is an extended ACL */
+                       error = ext3_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
                }
-               posix_acl_release(clone);
        }
 cleanup:
        posix_acl_release(acl);
index e38a204..7b094d1 100644 (file)
@@ -276,8 +276,7 @@ ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
                        inode->i_mode &= ~current_umask();
        }
        if (test_opt(inode->i_sb, POSIX_ACL) && acl) {
-               struct posix_acl *clone;
-               mode_t mode;
+               mode_t mode = inode->i_mode;
 
                if (S_ISDIR(inode->i_mode)) {
                        error = ext4_set_acl(handle, inode,
@@ -285,22 +284,15 @@ ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
                        if (error)
                                goto cleanup;
                }
-               clone = posix_acl_clone(acl, GFP_NOFS);
-               error = -ENOMEM;
-               if (!clone)
-                       goto cleanup;
-
-               mode = inode->i_mode;
-               error = posix_acl_create_masq(clone, &mode);
-               if (error >= 0) {
-                       inode->i_mode = mode;
-                       if (error > 0) {
-                               /* This is an extended ACL */
-                               error = ext4_set_acl(handle, inode,
-                                                    ACL_TYPE_ACCESS, clone);
-                       }
+               error = posix_acl_create(&acl, GFP_NOFS, &mode);
+               if (error < 0)
+                       return error;
+
+               inode->i_mode = mode;
+               if (error > 0) {
+                       /* This is an extended ACL */
+                       error = ext4_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
                }
-               posix_acl_release(clone);
        }
 cleanup:
        posix_acl_release(acl);
index 1347821..ea19ca4 100644 (file)
@@ -132,25 +132,17 @@ generic_acl_init(struct inode *inode, struct inode *dir)
        if (!S_ISLNK(inode->i_mode))
                acl = get_cached_acl(dir, ACL_TYPE_DEFAULT);
        if (acl) {
-               struct posix_acl *clone;
-
                if (S_ISDIR(inode->i_mode))
                        set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
-               clone = posix_acl_clone(acl, GFP_KERNEL);
-               error = -ENOMEM;
-               if (!clone)
-                       goto cleanup;
-               error = posix_acl_create_masq(clone, &mode);
-               if (error >= 0) {
-                       inode->i_mode = mode;
-                       if (error > 0)
-                               set_cached_acl(inode, ACL_TYPE_ACCESS, clone);
-               }
-               posix_acl_release(clone);
+               error = posix_acl_create(&acl, GFP_KERNEL, &mode);
+               if (error < 0)
+                       return error;
+               inode->i_mode = mode;
+               if (error > 0)
+                       set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
        }
        error = 0;
 
-cleanup:
        posix_acl_release(acl);
        return error;
 }
index 160d4e1..a2dd63c 100644 (file)
@@ -137,7 +137,7 @@ out:
 int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode)
 {
        struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
-       struct posix_acl *acl, *clone;
+       struct posix_acl *acl;
        mode_t mode = inode->i_mode;
        int error = 0;
 
@@ -162,16 +162,10 @@ int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode)
                        goto out;
        }
 
-       clone = posix_acl_clone(acl, GFP_NOFS);
-       error = -ENOMEM;
-       if (!clone)
-               goto out;
-       posix_acl_release(acl);
-       acl = clone;
-
-       error = posix_acl_create_masq(acl, &mode);
+       error = posix_acl_create(&acl, GFP_NOFS, &mode);
        if (error < 0)
-               goto out;
+               return error;
+
        if (error == 0)
                goto munge;
 
index 71d022d..5783ed8 100644 (file)
@@ -277,7 +277,7 @@ int jffs2_check_acl(struct inode *inode, int mask)
 
 int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, mode_t *i_mode)
 {
-       struct posix_acl *acl, *clone;
+       struct posix_acl *acl;
        int rc;
 
        cache_no_acl(inode);
@@ -295,18 +295,13 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, mode_t *i_mode)
                if (S_ISDIR(*i_mode))
                        set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
 
-               clone = posix_acl_clone(acl, GFP_KERNEL);
-               if (!clone)
-                       return -ENOMEM;
-               rc = posix_acl_create_masq(clone, i_mode);
-               if (rc < 0) {
-                       posix_acl_release(clone);
+               rc = posix_acl_create(&acl, GFP_KERNEL, i_mode);
+               if (rc < 0)
                        return rc;
-               }
                if (rc > 0)
-                       set_cached_acl(inode, ACL_TYPE_ACCESS, clone);
+                       set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
 
-               posix_acl_release(clone);
+               posix_acl_release(acl);
        }
        return 0;
 }
index 89ced71..687a1ae 100644 (file)
@@ -133,8 +133,6 @@ int jfs_check_acl(struct inode *inode, int mask)
 int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
 {
        struct posix_acl *acl = NULL;
-       struct posix_acl *clone;
-       mode_t mode;
        int rc = 0;
 
        if (S_ISLNK(inode->i_mode))
@@ -145,25 +143,18 @@ int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
                return PTR_ERR(acl);
 
        if (acl) {
+               mode_t mode = inode->i_mode;
                if (S_ISDIR(inode->i_mode)) {
                        rc = jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, acl);
                        if (rc)
                                goto cleanup;
                }
-               clone = posix_acl_clone(acl, GFP_KERNEL);
-               if (!clone) {
-                       rc = -ENOMEM;
-                       goto cleanup;
-               }
-               mode = inode->i_mode;
-               rc = posix_acl_create_masq(clone, &mode);
-               if (rc >= 0) {
-                       inode->i_mode = mode;
-                       if (rc > 0)
-                               rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS,
-                                                clone);
-               }
-               posix_acl_release(clone);
+               rc = posix_acl_create(&acl, GFP_KERNEL, &mode);
+               if (rc < 0)
+                       goto cleanup; /* posix_acl_release(NULL) is no-op */
+               inode->i_mode = mode;
+               if (rc > 0)
+                       rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
 cleanup:
                posix_acl_release(acl);
        } else
index 2743427..e49e731 100644 (file)
@@ -427,16 +427,12 @@ int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
        }
        if (!dfacl)
                return 0;
-       acl = posix_acl_clone(dfacl, GFP_KERNEL);
-       error = -ENOMEM;
-       if (!acl)
-               goto out_release_dfacl;
-       error = posix_acl_create_masq(acl, &mode);
+       acl = posix_acl_dup(dfacl);
+       error = posix_acl_create(&acl, GFP_KERNEL, &mode);
        if (error < 0)
-               goto out_release_acl;
+               goto out_release_dfacl;
        error = nfs3_proc_setacls(inode, acl, S_ISDIR(inode->i_mode) ?
                                                      dfacl : NULL);
-out_release_acl:
        posix_acl_release(acl);
 out_release_dfacl:
        posix_acl_release(dfacl);
index dd0296a..480200e 100644 (file)
@@ -382,8 +382,6 @@ int ocfs2_init_acl(handle_t *handle,
                }
        }
        if ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) && acl) {
-               struct posix_acl *clone;
-
                if (S_ISDIR(inode->i_mode)) {
                        ret = ocfs2_set_acl(handle, inode, di_bh,
                                            ACL_TYPE_DEFAULT, acl,
@@ -391,28 +389,22 @@ int ocfs2_init_acl(handle_t *handle,
                        if (ret)
                                goto cleanup;
                }
-               clone = posix_acl_clone(acl, GFP_NOFS);
-               ret = -ENOMEM;
-               if (!clone)
-                       goto cleanup;
-
                mode = inode->i_mode;
-               ret = posix_acl_create_masq(clone, &mode);
-               if (ret >= 0) {
-                       ret2 = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
-                       if (ret2) {
-                               mlog_errno(ret2);
-                               ret = ret2;
-                               posix_acl_release(clone);
-                               goto cleanup;
-                       }
-                       if (ret > 0) {
-                               ret = ocfs2_set_acl(handle, inode,
-                                                   di_bh, ACL_TYPE_ACCESS,
-                                                   clone, meta_ac, data_ac);
-                       }
+               ret = posix_acl_create(&acl, GFP_NOFS, &mode);
+               if (ret < 0)
+                       return ret;
+
+               ret2 = ocfs2_acl_set_mode(inode, di_bh, handle, mode);
+               if (ret2) {
+                       mlog_errno(ret2);
+                       ret = ret2;
+                       goto cleanup;
+               }
+               if (ret > 0) {
+                       ret = ocfs2_set_acl(handle, inode,
+                                           di_bh, ACL_TYPE_ACCESS,
+                                           acl, meta_ac, data_ac);
                }
-               posix_acl_release(clone);
        }
 cleanup:
        posix_acl_release(acl);
index 0aa9f16..365a071 100644 (file)
@@ -388,6 +388,24 @@ posix_acl_chmod_masq(struct posix_acl *acl, mode_t mode)
 }
 
 int
+posix_acl_create(struct posix_acl **acl, gfp_t gfp, mode_t *mode_p)
+{
+       struct posix_acl *clone = posix_acl_clone(*acl, gfp);
+       int err = -ENOMEM;
+       if (clone) {
+               err = posix_acl_create_masq(clone, mode_p);
+               if (err < 0) {
+                       posix_acl_release(clone);
+                       clone = NULL;
+               }
+       }
+       posix_acl_release(*acl);
+       *acl = clone;
+       return err;
+}
+EXPORT_SYMBOL(posix_acl_create);
+
+int
 posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, mode_t mode)
 {
        struct posix_acl *clone = posix_acl_clone(*acl, gfp);
index 26b08ac..7362cf4 100644 (file)
@@ -354,9 +354,7 @@ reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
                return PTR_ERR(acl);
 
        if (acl) {
-               struct posix_acl *acl_copy;
                mode_t mode = inode->i_mode;
-               int need_acl;
 
                /* Copy the default ACL to the default ACL of a new directory */
                if (S_ISDIR(inode->i_mode)) {
@@ -368,29 +366,15 @@ reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
 
                /* Now we reconcile the new ACL and the mode,
                   potentially modifying both */
-               acl_copy = posix_acl_clone(acl, GFP_NOFS);
-               if (!acl_copy) {
-                       err = -ENOMEM;
-                       goto cleanup;
-               }
+               err = posix_acl_create(&acl, GFP_NOFS, &mode);
+               if (err < 0)
+                       return err;
 
-               need_acl = posix_acl_create_masq(acl_copy, &mode);
-               if (need_acl >= 0) {
-                       if (mode != inode->i_mode) {
-                               inode->i_mode = mode;
-                       }
+               inode->i_mode = mode;
 
-                       /* If we need an ACL.. */
-                       if (need_acl > 0) {
-                               err = reiserfs_set_acl(th, inode,
-                                                      ACL_TYPE_ACCESS,
-                                                      acl_copy);
-                               if (err)
-                                       goto cleanup_copy;
-                       }
-               }
-             cleanup_copy:
-               posix_acl_release(acl_copy);
+               /* If we need an ACL.. */
+               if (err > 0)
+                       err = reiserfs_set_acl(th, inode, ACL_TYPE_ACCESS, acl);
              cleanup:
                posix_acl_release(acl);
        } else {
index 4c55412..2827bbd 100644 (file)
@@ -282,29 +282,23 @@ posix_acl_default_exists(struct inode *inode)
  * No need for i_mutex because the inode is not yet exposed to the VFS.
  */
 int
-xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl)
+xfs_inherit_acl(struct inode *inode, struct posix_acl *acl)
 {
-       struct posix_acl *clone;
-       mode_t mode;
+       mode_t mode = inode->i_mode;
        int error = 0, inherit = 0;
 
        if (S_ISDIR(inode->i_mode)) {
-               error = xfs_set_acl(inode, ACL_TYPE_DEFAULT, default_acl);
+               error = xfs_set_acl(inode, ACL_TYPE_DEFAULT, acl);
                if (error)
-                       return error;
+                       goto out;
        }
 
-       clone = posix_acl_clone(default_acl, GFP_KERNEL);
-       if (!clone)
-               return -ENOMEM;
-
-       mode = inode->i_mode;
-       error = posix_acl_create_masq(clone, &mode);
+       error = posix_acl_create(&acl, GFP_KERNEL, &mode);
        if (error < 0)
-               goto out_release_clone;
+               return error;
 
        /*
-        * If posix_acl_create_masq returns a positive value we need to
+        * If posix_acl_create returns a positive value we need to
         * inherit a permission that can't be represented using the Unix
         * mode bits and we actually need to set an ACL.
         */
@@ -313,13 +307,13 @@ xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl)
 
        error = xfs_set_mode(inode, mode);
        if (error)
-               goto out_release_clone;
+               goto out;
 
        if (inherit)
-               error = xfs_set_acl(inode, ACL_TYPE_ACCESS, clone);
+               error = xfs_set_acl(inode, ACL_TYPE_ACCESS, acl);
 
- out_release_clone:
-       posix_acl_release(clone);
+out:
+       posix_acl_release(acl);
        return error;
 }
 
index de66691..77463dd 100644 (file)
@@ -202,9 +202,9 @@ xfs_vn_mknod(
 
        if (default_acl) {
                error = -xfs_inherit_acl(inode, default_acl);
+               default_acl = NULL;
                if (unlikely(error))
                        goto out_cleanup_inode;
-               posix_acl_release(default_acl);
        }
 
 
index 7a74d37..0ae0e4a 100644 (file)
@@ -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_create(struct posix_acl **, gfp_t, mode_t *);
 extern int posix_acl_chmod(struct posix_acl **, gfp_t, mode_t);
 
 extern struct posix_acl *get_posix_acl(struct inode *, int);