fs: make posix_acl_create more useful
Rename the current posix_acl_created to __posix_acl_create and add a fully featured helper to set up the ACLs on file creation that uses get_acl(). Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Родитель
5bf3258fd2
Коммит
37bc15392a
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@ -200,7 +200,7 @@ int v9fs_acl_mode(struct inode *dir, umode_t *modep,
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if (acl) {
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if (S_ISDIR(mode))
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*dpacl = posix_acl_dup(acl);
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retval = posix_acl_create(&acl, GFP_NOFS, &mode);
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retval = __posix_acl_create(&acl, GFP_NOFS, &mode);
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if (retval < 0)
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return retval;
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if (retval > 0)
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@ -222,7 +222,7 @@ int btrfs_init_acl(struct btrfs_trans_handle *trans,
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if (ret)
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goto failed;
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}
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ret = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
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ret = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
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if (ret < 0)
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return ret;
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@ -268,7 +268,7 @@ ext2_init_acl(struct inode *inode, struct inode *dir)
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if (error)
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goto cleanup;
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}
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error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
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error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
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if (error < 0)
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return error;
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if (error > 0) {
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@ -271,7 +271,7 @@ ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
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if (error)
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goto cleanup;
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}
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error = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
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error = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
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if (error < 0)
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return error;
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@ -276,7 +276,7 @@ ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
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if (error)
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goto cleanup;
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}
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error = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
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error = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
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if (error < 0)
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return error;
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@ -285,7 +285,7 @@ int f2fs_init_acl(struct inode *inode, struct inode *dir, struct page *ipage)
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if (error)
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goto cleanup;
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}
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error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
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error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
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if (error < 0)
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return error;
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if (error > 0)
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@ -128,7 +128,7 @@ generic_acl_init(struct inode *inode, struct inode *dir)
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if (acl) {
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if (S_ISDIR(inode->i_mode))
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set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
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error = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
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error = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
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if (error < 0)
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return error;
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if (error > 0)
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@ -131,7 +131,7 @@ int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode)
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goto out;
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}
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error = posix_acl_create(&acl, GFP_NOFS, &mode);
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error = __posix_acl_create(&acl, GFP_NOFS, &mode);
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if (error < 0)
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return error;
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@ -137,7 +137,7 @@ int hfsplus_init_posix_acl(struct inode *inode, struct inode *dir)
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goto init_acl_cleanup;
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}
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err = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
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err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
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if (unlikely(err < 0))
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return err;
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@ -295,7 +295,7 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, umode_t *i_mode
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if (S_ISDIR(*i_mode))
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set_cached_acl(inode, ACL_TYPE_DEFAULT, acl);
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rc = posix_acl_create(&acl, GFP_KERNEL, i_mode);
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rc = __posix_acl_create(&acl, GFP_KERNEL, i_mode);
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if (rc < 0)
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return rc;
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if (rc > 0)
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@ -132,7 +132,7 @@ int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
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if (rc)
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goto cleanup;
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}
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rc = posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
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rc = __posix_acl_create(&acl, GFP_KERNEL, &inode->i_mode);
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if (rc < 0)
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goto cleanup; /* posix_acl_release(NULL) is no-op */
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if (rc > 0)
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@ -428,7 +428,7 @@ int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
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if (!dfacl)
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return 0;
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acl = posix_acl_dup(dfacl);
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error = posix_acl_create(&acl, GFP_KERNEL, &mode);
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error = __posix_acl_create(&acl, GFP_KERNEL, &mode);
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if (error < 0)
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goto out_release_dfacl;
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error = nfs3_proc_setacls(inode, acl, S_ISDIR(inode->i_mode) ?
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@ -401,7 +401,7 @@ int ocfs2_init_acl(handle_t *handle,
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goto cleanup;
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}
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mode = inode->i_mode;
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ret = posix_acl_create(&acl, GFP_NOFS, &mode);
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ret = __posix_acl_create(&acl, GFP_NOFS, &mode);
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if (ret < 0)
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return ret;
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@ -410,7 +410,7 @@ static int __posix_acl_chmod_masq(struct posix_acl *acl, umode_t mode)
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}
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int
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posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
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__posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
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{
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struct posix_acl *clone = posix_acl_clone(*acl, gfp);
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int err = -ENOMEM;
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@ -425,7 +425,7 @@ posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p)
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*acl = clone;
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return err;
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}
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EXPORT_SYMBOL(posix_acl_create);
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EXPORT_SYMBOL(__posix_acl_create);
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int
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__posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode)
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@ -446,7 +446,7 @@ __posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode)
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EXPORT_SYMBOL(__posix_acl_chmod);
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int
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posix_acl_chmod(struct inode *inode)
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posix_acl_chmod(struct inode *inode, umode_t mode)
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{
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struct posix_acl *acl;
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int ret = 0;
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@ -460,7 +460,7 @@ posix_acl_chmod(struct inode *inode)
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if (IS_ERR_OR_NULL(acl))
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return PTR_ERR(acl);
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ret = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
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ret = __posix_acl_chmod(&acl, GFP_KERNEL, mode);
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if (ret)
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return ret;
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ret = inode->i_op->set_acl(inode, acl, ACL_TYPE_ACCESS);
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@ -469,6 +469,55 @@ posix_acl_chmod(struct inode *inode)
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}
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EXPORT_SYMBOL(posix_acl_chmod);
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int
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posix_acl_create(struct inode *dir, umode_t *mode,
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struct posix_acl **default_acl, struct posix_acl **acl)
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{
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struct posix_acl *p;
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int ret;
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if (S_ISLNK(*mode) || !IS_POSIXACL(dir))
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goto no_acl;
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p = get_acl(dir, ACL_TYPE_DEFAULT);
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if (IS_ERR(p))
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return PTR_ERR(p);
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if (!p) {
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*mode &= ~current_umask();
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goto no_acl;
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}
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*acl = posix_acl_clone(p, GFP_NOFS);
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if (!*acl)
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return -ENOMEM;
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ret = posix_acl_create_masq(*acl, mode);
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if (ret < 0) {
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posix_acl_release(*acl);
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return -ENOMEM;
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}
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if (ret == 0) {
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posix_acl_release(*acl);
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*acl = NULL;
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}
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if (!S_ISDIR(*mode)) {
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posix_acl_release(p);
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*default_acl = NULL;
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} else {
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*default_acl = p;
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}
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return 0;
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no_acl:
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*default_acl = NULL;
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*acl = NULL;
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return 0;
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}
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EXPORT_SYMBOL_GPL(posix_acl_create);
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/*
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* Fix up the uids and gids in posix acl extended attributes in place.
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*/
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@ -378,7 +378,7 @@ reiserfs_inherit_default_acl(struct reiserfs_transaction_handle *th,
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/* Now we reconcile the new ACL and the mode,
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potentially modifying both */
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err = posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
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err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
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if (err < 0)
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return err;
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@ -297,12 +297,12 @@ xfs_inherit_acl(struct inode *inode, struct posix_acl *acl)
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goto out;
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}
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error = posix_acl_create(&acl, GFP_KERNEL, &mode);
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error = __posix_acl_create(&acl, GFP_KERNEL, &mode);
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if (error < 0)
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return error;
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/*
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* If posix_acl_create returns a positive value we need to
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* If __posix_acl_create returns a positive value we need to
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* inherit a permission that can't be represented using the Unix
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* mode bits and we actually need to set an ACL.
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*/
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@ -88,14 +88,16 @@ extern int posix_acl_valid(const struct posix_acl *);
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extern int posix_acl_permission(struct inode *, const struct posix_acl *, int);
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extern struct posix_acl *posix_acl_from_mode(umode_t, gfp_t);
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extern int posix_acl_equiv_mode(const struct posix_acl *, umode_t *);
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extern int posix_acl_create(struct posix_acl **, gfp_t, umode_t *);
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extern int __posix_acl_create(struct posix_acl **, gfp_t, umode_t *);
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extern int __posix_acl_chmod(struct posix_acl **, gfp_t, umode_t);
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extern struct posix_acl *get_posix_acl(struct inode *, int);
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extern int set_posix_acl(struct inode *, int, struct posix_acl *);
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#ifdef CONFIG_FS_POSIX_ACL
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extern int posix_acl_chmod(struct inode *);
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extern int posix_acl_chmod(struct inode *, umode_t);
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extern int posix_acl_create(struct inode *, umode_t *, struct posix_acl **,
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struct posix_acl **);
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static inline struct posix_acl **acl_by_type(struct inode *inode, int type)
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{
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@ -174,7 +176,7 @@ static inline void cache_no_acl(struct inode *inode)
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inode->i_default_acl = NULL;
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}
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#else
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static inline int posix_acl_chmod(struct inode *inode)
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static inline int posix_acl_chmod(struct inode *inode, umode_t mode)
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{
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return 0;
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}
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@ -182,6 +184,13 @@ static inline int posix_acl_chmod(struct inode *inode)
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static inline void cache_no_acl(struct inode *inode)
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{
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}
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static inline int posix_acl_create(struct inode *inode, umode_t *mode,
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struct posix_acl **default_acl, struct posix_acl **acl)
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{
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*default_acl = *acl = NULL;
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return 0;
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}
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#endif /* CONFIG_FS_POSIX_ACL */
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struct posix_acl *get_acl(struct inode *inode, int type);
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