1 // SPDX-License-Identifier: GPL-2.0-or-later
16 #include <linux/backing-dev.h>
44 	return sb->s_fs_info;  in spufs_get_sb_info()
56 	ei->i_gang = NULL;  in spufs_alloc_inode()
57 	ei->i_ctx = NULL;  in spufs_alloc_inode()
58 	ei->i_openers = 0;  in spufs_alloc_inode()
60 	return &ei->vfs_inode;  in spufs_alloc_inode()
73 	inode_init_once(&ei->vfs_inode);  in spufs_init_once()
77 spufs_new_inode(struct super_block *sb, umode_t mode)  in spufs_new_inode()  argument
85 	inode->i_ino = get_next_ino();  in spufs_new_inode()
86 	inode->i_mode = mode;  in spufs_new_inode()
87 	inode->i_uid = current_fsuid();  in spufs_new_inode()
88 	inode->i_gid = current_fsgid();  in spufs_new_inode()
100 	if ((attr->ia_valid & ATTR_SIZE) &&  in spufs_setattr()
101 	    (attr->ia_size != inode->i_size))  in spufs_setattr()
102 		return -EINVAL;  in spufs_setattr()
111 		const struct file_operations *fops, umode_t mode,  in spufs_new_file()  argument
120 	ret = -ENOSPC;  in spufs_new_file()
121 	inode = spufs_new_inode(sb, S_IFREG | mode);  in spufs_new_file()
126 	inode->i_op = &spufs_file_iops;  in spufs_new_file()
127 	inode->i_fop = fops;  in spufs_new_file()
128 	inode->i_size = size;  in spufs_new_file()
129 	inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx);  in spufs_new_file()
140 	if (ei->i_ctx)  in spufs_evict_inode()
141 		put_spu_context(ei->i_ctx);  in spufs_evict_inode()
142 	if (ei->i_gang)  in spufs_evict_inode()
143 		put_spu_gang(ei->i_gang);  in spufs_evict_inode()
152 	hlist_for_each_entry_safe(dentry, n, &dir->d_children, d_sib) {  in spufs_prune_dir()
153 		spin_lock(&dentry->d_lock);  in spufs_prune_dir()
157 			spin_unlock(&dentry->d_lock);  in spufs_prune_dir()
164 			spin_unlock(&dentry->d_lock);  in spufs_prune_dir()
171 /* Caller must hold parent->i_mutex */
180 	spu_forget(SPUFS_I(d_inode(dir))->i_ctx);  in spufs_rmdir()
185 		const struct spufs_tree_descr *files, umode_t mode,  in spufs_fill_dir()  argument
188 	while (files->name && files->name[0]) {  in spufs_fill_dir()
190 		struct dentry *dentry = d_alloc_name(dir, files->name);  in spufs_fill_dir()
192 			return -ENOMEM;  in spufs_fill_dir()
193 		ret = spufs_new_file(dir->d_sb, dentry, files->ops,  in spufs_fill_dir()
194 					files->mode & mode, files->size, ctx);  in spufs_fill_dir()
208 	dir = file->f_path.dentry;  in spufs_dir_close()
209 	parent = d_inode(dir->d_parent);  in spufs_dir_close()
231 		umode_t mode)  in spufs_mkdir()  argument
237 	inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR);  in spufs_mkdir()
239 		return -ENOSPC;  in spufs_mkdir()
241 	inode_init_owner(&nop_mnt_idmap, inode, dir, mode | S_IFDIR);  in spufs_mkdir()
242 	ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */  in spufs_mkdir()
243 	SPUFS_I(inode)->i_ctx = ctx;  in spufs_mkdir()
246 		return -ENOSPC;  in spufs_mkdir()
249 	ctx->flags = flags;  in spufs_mkdir()
250 	inode->i_op = &simple_dir_inode_operations;  in spufs_mkdir()
251 	inode->i_fop = &simple_dir_operations;  in spufs_mkdir()
263 					 mode, ctx);  in spufs_mkdir()
265 		ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx);  in spufs_mkdir()
267 	if (!ret && spufs_get_sb_info(dir->i_sb)->debug)  in spufs_mkdir()
269 				mode, ctx);  in spufs_mkdir()
294 	filp->f_op = &spufs_context_fops;  in spufs_context_open()
308 					struct spu, cbe_list))->aff_list);  in spufs_assert_affinity()
311 		return ERR_PTR(-EINVAL);  in spufs_assert_affinity()
314 		return ERR_PTR(-EINVAL);  in spufs_assert_affinity()
317 	    gang->aff_ref_ctx &&  in spufs_assert_affinity()
318 	    gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM)  in spufs_assert_affinity()
319 		return ERR_PTR(-EEXIST);  in spufs_assert_affinity()
321 	if (gang->aff_flags & AFF_MERGED)  in spufs_assert_affinity()
322 		return ERR_PTR(-EBUSY);  in spufs_assert_affinity()
326 		if (!filp || filp->f_op != &spufs_context_fops)  in spufs_assert_affinity()
327 			return ERR_PTR(-EINVAL);  in spufs_assert_affinity()
330 				SPUFS_I(file_inode(filp))->i_ctx);  in spufs_assert_affinity()
332 		if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) &&  in spufs_assert_affinity()
333 		    !list_is_last(&neighbor->aff_list, &gang->aff_list_head) &&  in spufs_assert_affinity()
334 		    !list_entry(neighbor->aff_list.next, struct spu_context,  in spufs_assert_affinity()
335 		    aff_list)->aff_head) {  in spufs_assert_affinity()
336 			err = ERR_PTR(-EEXIST);  in spufs_assert_affinity()
340 		if (gang != neighbor->gang) {  in spufs_assert_affinity()
341 			err = ERR_PTR(-EINVAL);  in spufs_assert_affinity()
346 		list_for_each_entry(tmp, &gang->aff_list_head, aff_list)  in spufs_assert_affinity()
348 		if (list_empty(&neighbor->aff_list))  in spufs_assert_affinity()
352 			if ((cbe_spu_info[node].n_spus - atomic_read(  in spufs_assert_affinity()
358 			err = ERR_PTR(-EEXIST);  in spufs_assert_affinity()
375 		ctx->gang->aff_ref_ctx = ctx;  in spufs_set_affinity()
378 		if (list_empty(&neighbor->aff_list)) {  in spufs_set_affinity()
379 			list_add_tail(&neighbor->aff_list,  in spufs_set_affinity()
380 				&ctx->gang->aff_list_head);  in spufs_set_affinity()
381 			neighbor->aff_head = 1;  in spufs_set_affinity()
384 		if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head)  in spufs_set_affinity()
385 		    || list_entry(neighbor->aff_list.next, struct spu_context,  in spufs_set_affinity()
386 							aff_list)->aff_head) {  in spufs_set_affinity()
387 			list_add(&ctx->aff_list, &neighbor->aff_list);  in spufs_set_affinity()
389 			list_add_tail(&ctx->aff_list, &neighbor->aff_list);  in spufs_set_affinity()
390 			if (neighbor->aff_head) {  in spufs_set_affinity()
391 				neighbor->aff_head = 0;  in spufs_set_affinity()
392 				ctx->aff_head = 1;  in spufs_set_affinity()
396 		if (!ctx->gang->aff_ref_ctx)  in spufs_set_affinity()
397 			ctx->gang->aff_ref_ctx = ctx;  in spufs_set_affinity()
403 			struct vfsmount *mnt, int flags, umode_t mode,  in spufs_create_context()  argument
414 		return -EPERM;  in spufs_create_context()
418 		return -EINVAL;  in spufs_create_context()
421 		return -ENODEV;  in spufs_create_context()
427 		gang = SPUFS_I(inode)->i_gang;  in spufs_create_context()
429 			return -EINVAL;  in spufs_create_context()
430 		mutex_lock(&gang->aff_mutex);  in spufs_create_context()
438 	ret = spufs_mkdir(inode, dentry, flags, mode & 0777);  in spufs_create_context()
443 		spufs_set_affinity(flags, SPUFS_I(d_inode(dentry))->i_ctx,  in spufs_create_context()
455 		mutex_unlock(&gang->aff_mutex);  in spufs_create_context()
460 spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode)  in spufs_mkgang()  argument
466 	ret = -ENOSPC;  in spufs_mkgang()
467 	inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR);  in spufs_mkgang()
472 	inode_init_owner(&nop_mnt_idmap, inode, dir, mode | S_IFDIR);  in spufs_mkgang()
474 	SPUFS_I(inode)->i_ctx = NULL;  in spufs_mkgang()
475 	SPUFS_I(inode)->i_gang = gang;  in spufs_mkgang()
477 		ret = -ENOMEM;  in spufs_mkgang()
481 	inode->i_op = &simple_dir_inode_operations;  in spufs_mkgang()
482 	inode->i_fop = &simple_dir_operations;  in spufs_mkgang()
514 	filp->f_op = &simple_dir_operations;  in spufs_gang_open()
521 			struct vfsmount *mnt, umode_t mode)  in spufs_create_gang()  argument
526 	ret = spufs_mkgang(inode, dentry, mode & 0777);  in spufs_create_gang()
541 		unsigned int flags, umode_t mode, struct file *filp)  in spufs_create()  argument
543 	struct inode *dir = d_inode(path->dentry);  in spufs_create()
547 	if (path->dentry->d_sb->s_type != &spufs_type)  in spufs_create()
548 		return -EINVAL;  in spufs_create()
552 		return -EINVAL;  in spufs_create()
555 	if (path->dentry != path->dentry->d_sb->s_root)  in spufs_create()
556 		if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang)  in spufs_create()
557 			return -EINVAL;  in spufs_create()
559 	mode &= ~current_umask();  in spufs_create()
562 		ret = spufs_create_gang(dir, dentry, path->mnt, mode);  in spufs_create()
564 		ret = spufs_create_context(dir, dentry, path->mnt, flags, mode,  in spufs_create()
576 	umode_t	mode;  member
585 	fsparam_u32oct	("mode",			Opt_mode),
593 	struct spufs_sb_info *sbi = spufs_get_sb_info(root->d_sb);  in spufs_show_options()
594 	struct inode *inode = root->d_inode;  in spufs_show_options()
596 	if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID))  in spufs_show_options()
598 			   from_kuid_munged(&init_user_ns, inode->i_uid));  in spufs_show_options()
599 	if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID))  in spufs_show_options()
601 			   from_kgid_munged(&init_user_ns, inode->i_gid));  in spufs_show_options()
602 	if ((inode->i_mode & S_IALLUGO) != 0775)  in spufs_show_options()
603 		seq_printf(m, ",mode=%o", inode->i_mode);  in spufs_show_options()
604 	if (sbi->debug)  in spufs_show_options()
611 	struct spufs_fs_context *ctx = fc->fs_private;  in spufs_parse_param()
612 	struct spufs_sb_info *sbi = fc->s_fs_info;  in spufs_parse_param()
627 		ctx->uid = uid;  in spufs_parse_param()
633 		ctx->gid = gid;  in spufs_parse_param()
636 		ctx->mode = result.uint_32 & S_IALLUGO;  in spufs_parse_param()
639 		sbi->debug = true;  in spufs_parse_param()
656 	const char *loader;  in spufs_init_isolated_loader()  local
659 	dn = of_find_node_by_path("/spu-isolation");  in spufs_init_isolated_loader()
663 	loader = of_get_property(dn, "loader", &size);  in spufs_init_isolated_loader()
665 	if (!loader)  in spufs_init_isolated_loader()
668 	/* the loader must be align on a 16 byte boundary */  in spufs_init_isolated_loader()
674 	memcpy(isolated_loader, loader, size);  in spufs_init_isolated_loader()
675 	printk(KERN_INFO "spufs: SPU isolation mode enabled\n");  in spufs_init_isolated_loader()
680 	struct spufs_fs_context *ctx = fc->fs_private;  in spufs_create_root()
684 		return -ENODEV;  in spufs_create_root()
686 	inode = spufs_new_inode(sb, S_IFDIR | ctx->mode);  in spufs_create_root()
688 		return -ENOMEM;  in spufs_create_root()
690 	inode->i_uid = ctx->uid;  in spufs_create_root()
691 	inode->i_gid = ctx->gid;  in spufs_create_root()
692 	inode->i_op = &simple_dir_inode_operations;  in spufs_create_root()
693 	inode->i_fop = &simple_dir_operations;  in spufs_create_root()
694 	SPUFS_I(inode)->i_ctx = NULL;  in spufs_create_root()
697 	sb->s_root = d_make_root(inode);  in spufs_create_root()
698 	if (!sb->s_root)  in spufs_create_root()
699 		return -ENOMEM;  in spufs_create_root()
713 	sb->s_maxbytes = MAX_LFS_FILESIZE;  in spufs_fill_super()
714 	sb->s_blocksize = PAGE_SIZE;  in spufs_fill_super()
715 	sb->s_blocksize_bits = PAGE_SHIFT;  in spufs_fill_super()
716 	sb->s_magic = SPUFS_MAGIC;  in spufs_fill_super()
717 	sb->s_op = &spufs_ops;  in spufs_fill_super()
729 	kfree(fc->s_fs_info);  in spufs_free_fc()
751 	ctx->uid = current_uid();  in spufs_init_fs_context()
752 	ctx->gid = current_gid();  in spufs_init_fs_context()
753 	ctx->mode = 0755;  in spufs_init_fs_context()
755 	fc->fs_private = ctx;  in spufs_init_fs_context()
756 	fc->s_fs_info = sbi;  in spufs_init_fs_context()
757 	fc->ops = &spufs_context_ops;  in spufs_init_fs_context()
763 	return -ENOMEM;  in spufs_init_fs_context()
779 	ret = -ENODEV;  in spufs_init()
783 	ret = -ENOMEM;  in spufs_init()