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824 lines
18 KiB
824 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* SPU file system |
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* |
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* (C) Copyright IBM Deutschland Entwicklung GmbH 2005 |
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* |
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* Author: Arnd Bergmann <[email protected]> |
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*/ |
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|
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#include <linux/file.h> |
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#include <linux/fs.h> |
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#include <linux/fs_context.h> |
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#include <linux/fs_parser.h> |
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#include <linux/fsnotify.h> |
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#include <linux/backing-dev.h> |
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#include <linux/init.h> |
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#include <linux/ioctl.h> |
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#include <linux/module.h> |
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#include <linux/mount.h> |
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#include <linux/namei.h> |
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#include <linux/pagemap.h> |
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#include <linux/poll.h> |
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#include <linux/slab.h> |
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|
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#include <asm/prom.h> |
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#include <asm/spu.h> |
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#include <asm/spu_priv1.h> |
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#include <linux/uaccess.h> |
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#include "spufs.h" |
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|
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struct spufs_sb_info { |
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bool debug; |
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}; |
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|
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static struct kmem_cache *spufs_inode_cache; |
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char *isolated_loader; |
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static int isolated_loader_size; |
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|
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static struct spufs_sb_info *spufs_get_sb_info(struct super_block *sb) |
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{ |
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return sb->s_fs_info; |
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} |
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static struct inode * |
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spufs_alloc_inode(struct super_block *sb) |
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{ |
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struct spufs_inode_info *ei; |
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|
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ei = kmem_cache_alloc(spufs_inode_cache, GFP_KERNEL); |
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if (!ei) |
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return NULL; |
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|
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ei->i_gang = NULL; |
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ei->i_ctx = NULL; |
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ei->i_openers = 0; |
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|
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return &ei->vfs_inode; |
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} |
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|
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static void spufs_free_inode(struct inode *inode) |
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{ |
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kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); |
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} |
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|
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static void |
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spufs_init_once(void *p) |
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{ |
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struct spufs_inode_info *ei = p; |
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|
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inode_init_once(&ei->vfs_inode); |
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} |
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|
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static struct inode * |
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spufs_new_inode(struct super_block *sb, umode_t mode) |
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{ |
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struct inode *inode; |
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|
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inode = new_inode(sb); |
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if (!inode) |
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goto out; |
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|
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inode->i_ino = get_next_ino(); |
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inode->i_mode = mode; |
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inode->i_uid = current_fsuid(); |
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inode->i_gid = current_fsgid(); |
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inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
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out: |
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return inode; |
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} |
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|
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static int |
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spufs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, |
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struct iattr *attr) |
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{ |
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struct inode *inode = d_inode(dentry); |
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|
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if ((attr->ia_valid & ATTR_SIZE) && |
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(attr->ia_size != inode->i_size)) |
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return -EINVAL; |
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setattr_copy(&init_user_ns, inode, attr); |
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mark_inode_dirty(inode); |
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return 0; |
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} |
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static int |
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spufs_new_file(struct super_block *sb, struct dentry *dentry, |
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const struct file_operations *fops, umode_t mode, |
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size_t size, struct spu_context *ctx) |
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{ |
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static const struct inode_operations spufs_file_iops = { |
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.setattr = spufs_setattr, |
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}; |
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struct inode *inode; |
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int ret; |
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|
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ret = -ENOSPC; |
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inode = spufs_new_inode(sb, S_IFREG | mode); |
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if (!inode) |
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goto out; |
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|
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ret = 0; |
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inode->i_op = &spufs_file_iops; |
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inode->i_fop = fops; |
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inode->i_size = size; |
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inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); |
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d_add(dentry, inode); |
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out: |
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return ret; |
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} |
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|
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static void |
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spufs_evict_inode(struct inode *inode) |
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{ |
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struct spufs_inode_info *ei = SPUFS_I(inode); |
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clear_inode(inode); |
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if (ei->i_ctx) |
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put_spu_context(ei->i_ctx); |
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if (ei->i_gang) |
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put_spu_gang(ei->i_gang); |
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} |
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static void spufs_prune_dir(struct dentry *dir) |
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{ |
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struct dentry *dentry, *tmp; |
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|
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inode_lock(d_inode(dir)); |
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list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_child) { |
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spin_lock(&dentry->d_lock); |
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if (simple_positive(dentry)) { |
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dget_dlock(dentry); |
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__d_drop(dentry); |
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spin_unlock(&dentry->d_lock); |
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simple_unlink(d_inode(dir), dentry); |
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/* XXX: what was dcache_lock protecting here? Other |
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* filesystems (IB, configfs) release dcache_lock |
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* before unlink */ |
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dput(dentry); |
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} else { |
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spin_unlock(&dentry->d_lock); |
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} |
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} |
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shrink_dcache_parent(dir); |
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inode_unlock(d_inode(dir)); |
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} |
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|
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/* Caller must hold parent->i_mutex */ |
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static int spufs_rmdir(struct inode *parent, struct dentry *dir) |
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{ |
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/* remove all entries */ |
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int res; |
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spufs_prune_dir(dir); |
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d_drop(dir); |
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res = simple_rmdir(parent, dir); |
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/* We have to give up the mm_struct */ |
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spu_forget(SPUFS_I(d_inode(dir))->i_ctx); |
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return res; |
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} |
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|
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static int spufs_fill_dir(struct dentry *dir, |
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const struct spufs_tree_descr *files, umode_t mode, |
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struct spu_context *ctx) |
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{ |
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while (files->name && files->name[0]) { |
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int ret; |
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struct dentry *dentry = d_alloc_name(dir, files->name); |
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if (!dentry) |
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return -ENOMEM; |
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ret = spufs_new_file(dir->d_sb, dentry, files->ops, |
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files->mode & mode, files->size, ctx); |
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if (ret) |
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return ret; |
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files++; |
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} |
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return 0; |
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} |
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static int spufs_dir_close(struct inode *inode, struct file *file) |
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{ |
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struct inode *parent; |
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struct dentry *dir; |
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int ret; |
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dir = file->f_path.dentry; |
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parent = d_inode(dir->d_parent); |
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inode_lock_nested(parent, I_MUTEX_PARENT); |
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ret = spufs_rmdir(parent, dir); |
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inode_unlock(parent); |
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WARN_ON(ret); |
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|
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return dcache_dir_close(inode, file); |
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} |
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|
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const struct file_operations spufs_context_fops = { |
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.open = dcache_dir_open, |
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.release = spufs_dir_close, |
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.llseek = dcache_dir_lseek, |
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.read = generic_read_dir, |
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.iterate_shared = dcache_readdir, |
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.fsync = noop_fsync, |
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}; |
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EXPORT_SYMBOL_GPL(spufs_context_fops); |
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static int |
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spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, |
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umode_t mode) |
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{ |
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int ret; |
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struct inode *inode; |
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struct spu_context *ctx; |
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inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); |
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if (!inode) |
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return -ENOSPC; |
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inode_init_owner(&init_user_ns, inode, dir, mode | S_IFDIR); |
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ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ |
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SPUFS_I(inode)->i_ctx = ctx; |
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if (!ctx) { |
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iput(inode); |
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return -ENOSPC; |
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} |
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ctx->flags = flags; |
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inode->i_op = &simple_dir_inode_operations; |
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inode->i_fop = &simple_dir_operations; |
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inode_lock(inode); |
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dget(dentry); |
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inc_nlink(dir); |
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inc_nlink(inode); |
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d_instantiate(dentry, inode); |
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|
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if (flags & SPU_CREATE_NOSCHED) |
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ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, |
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mode, ctx); |
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else |
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ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); |
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if (!ret && spufs_get_sb_info(dir->i_sb)->debug) |
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ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, |
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mode, ctx); |
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if (ret) |
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spufs_rmdir(dir, dentry); |
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inode_unlock(inode); |
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return ret; |
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} |
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static int spufs_context_open(struct path *path) |
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{ |
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int ret; |
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struct file *filp; |
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|
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ret = get_unused_fd_flags(0); |
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if (ret < 0) |
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return ret; |
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filp = dentry_open(path, O_RDONLY, current_cred()); |
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if (IS_ERR(filp)) { |
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put_unused_fd(ret); |
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return PTR_ERR(filp); |
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} |
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filp->f_op = &spufs_context_fops; |
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fd_install(ret, filp); |
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return ret; |
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} |
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|
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static struct spu_context * |
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spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, |
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struct file *filp) |
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{ |
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struct spu_context *tmp, *neighbor, *err; |
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int count, node; |
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int aff_supp; |
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|
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aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, |
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struct spu, cbe_list))->aff_list); |
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if (!aff_supp) |
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return ERR_PTR(-EINVAL); |
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|
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if (flags & SPU_CREATE_GANG) |
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return ERR_PTR(-EINVAL); |
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if (flags & SPU_CREATE_AFFINITY_MEM && |
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gang->aff_ref_ctx && |
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gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) |
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return ERR_PTR(-EEXIST); |
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|
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if (gang->aff_flags & AFF_MERGED) |
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return ERR_PTR(-EBUSY); |
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neighbor = NULL; |
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if (flags & SPU_CREATE_AFFINITY_SPU) { |
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if (!filp || filp->f_op != &spufs_context_fops) |
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return ERR_PTR(-EINVAL); |
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|
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neighbor = get_spu_context( |
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SPUFS_I(file_inode(filp))->i_ctx); |
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|
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if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && |
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!list_is_last(&neighbor->aff_list, &gang->aff_list_head) && |
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!list_entry(neighbor->aff_list.next, struct spu_context, |
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aff_list)->aff_head) { |
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err = ERR_PTR(-EEXIST); |
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goto out_put_neighbor; |
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} |
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|
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if (gang != neighbor->gang) { |
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err = ERR_PTR(-EINVAL); |
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goto out_put_neighbor; |
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} |
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|
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count = 1; |
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list_for_each_entry(tmp, &gang->aff_list_head, aff_list) |
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count++; |
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if (list_empty(&neighbor->aff_list)) |
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count++; |
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|
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for (node = 0; node < MAX_NUMNODES; node++) { |
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if ((cbe_spu_info[node].n_spus - atomic_read( |
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&cbe_spu_info[node].reserved_spus)) >= count) |
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break; |
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} |
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|
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if (node == MAX_NUMNODES) { |
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err = ERR_PTR(-EEXIST); |
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goto out_put_neighbor; |
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} |
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} |
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|
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return neighbor; |
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|
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out_put_neighbor: |
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put_spu_context(neighbor); |
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return err; |
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} |
|
|
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static void |
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spufs_set_affinity(unsigned int flags, struct spu_context *ctx, |
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struct spu_context *neighbor) |
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{ |
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if (flags & SPU_CREATE_AFFINITY_MEM) |
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ctx->gang->aff_ref_ctx = ctx; |
|
|
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if (flags & SPU_CREATE_AFFINITY_SPU) { |
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if (list_empty(&neighbor->aff_list)) { |
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list_add_tail(&neighbor->aff_list, |
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&ctx->gang->aff_list_head); |
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neighbor->aff_head = 1; |
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} |
|
|
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if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) |
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|| list_entry(neighbor->aff_list.next, struct spu_context, |
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aff_list)->aff_head) { |
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list_add(&ctx->aff_list, &neighbor->aff_list); |
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} else { |
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list_add_tail(&ctx->aff_list, &neighbor->aff_list); |
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if (neighbor->aff_head) { |
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neighbor->aff_head = 0; |
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ctx->aff_head = 1; |
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} |
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} |
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|
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if (!ctx->gang->aff_ref_ctx) |
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ctx->gang->aff_ref_ctx = ctx; |
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} |
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} |
|
|
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static int |
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spufs_create_context(struct inode *inode, struct dentry *dentry, |
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struct vfsmount *mnt, int flags, umode_t mode, |
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struct file *aff_filp) |
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{ |
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int ret; |
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int affinity; |
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struct spu_gang *gang; |
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struct spu_context *neighbor; |
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struct path path = {.mnt = mnt, .dentry = dentry}; |
|
|
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if ((flags & SPU_CREATE_NOSCHED) && |
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!capable(CAP_SYS_NICE)) |
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return -EPERM; |
|
|
|
if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) |
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== SPU_CREATE_ISOLATE) |
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return -EINVAL; |
|
|
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if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) |
|
return -ENODEV; |
|
|
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gang = NULL; |
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neighbor = NULL; |
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affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); |
|
if (affinity) { |
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gang = SPUFS_I(inode)->i_gang; |
|
if (!gang) |
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return -EINVAL; |
|
mutex_lock(&gang->aff_mutex); |
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neighbor = spufs_assert_affinity(flags, gang, aff_filp); |
|
if (IS_ERR(neighbor)) { |
|
ret = PTR_ERR(neighbor); |
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goto out_aff_unlock; |
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} |
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} |
|
|
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ret = spufs_mkdir(inode, dentry, flags, mode & 0777); |
|
if (ret) |
|
goto out_aff_unlock; |
|
|
|
if (affinity) { |
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spufs_set_affinity(flags, SPUFS_I(d_inode(dentry))->i_ctx, |
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neighbor); |
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if (neighbor) |
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put_spu_context(neighbor); |
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} |
|
|
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ret = spufs_context_open(&path); |
|
if (ret < 0) |
|
WARN_ON(spufs_rmdir(inode, dentry)); |
|
|
|
out_aff_unlock: |
|
if (affinity) |
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mutex_unlock(&gang->aff_mutex); |
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return ret; |
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} |
|
|
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static int |
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spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode) |
|
{ |
|
int ret; |
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struct inode *inode; |
|
struct spu_gang *gang; |
|
|
|
ret = -ENOSPC; |
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inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); |
|
if (!inode) |
|
goto out; |
|
|
|
ret = 0; |
|
inode_init_owner(&init_user_ns, inode, dir, mode | S_IFDIR); |
|
gang = alloc_spu_gang(); |
|
SPUFS_I(inode)->i_ctx = NULL; |
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SPUFS_I(inode)->i_gang = gang; |
|
if (!gang) { |
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ret = -ENOMEM; |
|
goto out_iput; |
|
} |
|
|
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inode->i_op = &simple_dir_inode_operations; |
|
inode->i_fop = &simple_dir_operations; |
|
|
|
d_instantiate(dentry, inode); |
|
inc_nlink(dir); |
|
inc_nlink(d_inode(dentry)); |
|
return ret; |
|
|
|
out_iput: |
|
iput(inode); |
|
out: |
|
return ret; |
|
} |
|
|
|
static int spufs_gang_open(struct path *path) |
|
{ |
|
int ret; |
|
struct file *filp; |
|
|
|
ret = get_unused_fd_flags(0); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* |
|
* get references for dget and mntget, will be released |
|
* in error path of *_open(). |
|
*/ |
|
filp = dentry_open(path, O_RDONLY, current_cred()); |
|
if (IS_ERR(filp)) { |
|
put_unused_fd(ret); |
|
return PTR_ERR(filp); |
|
} |
|
|
|
filp->f_op = &simple_dir_operations; |
|
fd_install(ret, filp); |
|
return ret; |
|
} |
|
|
|
static int spufs_create_gang(struct inode *inode, |
|
struct dentry *dentry, |
|
struct vfsmount *mnt, umode_t mode) |
|
{ |
|
struct path path = {.mnt = mnt, .dentry = dentry}; |
|
int ret; |
|
|
|
ret = spufs_mkgang(inode, dentry, mode & 0777); |
|
if (!ret) { |
|
ret = spufs_gang_open(&path); |
|
if (ret < 0) { |
|
int err = simple_rmdir(inode, dentry); |
|
WARN_ON(err); |
|
} |
|
} |
|
return ret; |
|
} |
|
|
|
|
|
static struct file_system_type spufs_type; |
|
|
|
long spufs_create(struct path *path, struct dentry *dentry, |
|
unsigned int flags, umode_t mode, struct file *filp) |
|
{ |
|
struct inode *dir = d_inode(path->dentry); |
|
int ret; |
|
|
|
/* check if we are on spufs */ |
|
if (path->dentry->d_sb->s_type != &spufs_type) |
|
return -EINVAL; |
|
|
|
/* don't accept undefined flags */ |
|
if (flags & (~SPU_CREATE_FLAG_ALL)) |
|
return -EINVAL; |
|
|
|
/* only threads can be underneath a gang */ |
|
if (path->dentry != path->dentry->d_sb->s_root) |
|
if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) |
|
return -EINVAL; |
|
|
|
mode &= ~current_umask(); |
|
|
|
if (flags & SPU_CREATE_GANG) |
|
ret = spufs_create_gang(dir, dentry, path->mnt, mode); |
|
else |
|
ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, |
|
filp); |
|
if (ret >= 0) |
|
fsnotify_mkdir(dir, dentry); |
|
|
|
return ret; |
|
} |
|
|
|
/* File system initialization */ |
|
struct spufs_fs_context { |
|
kuid_t uid; |
|
kgid_t gid; |
|
umode_t mode; |
|
}; |
|
|
|
enum { |
|
Opt_uid, Opt_gid, Opt_mode, Opt_debug, |
|
}; |
|
|
|
static const struct fs_parameter_spec spufs_fs_parameters[] = { |
|
fsparam_u32 ("gid", Opt_gid), |
|
fsparam_u32oct ("mode", Opt_mode), |
|
fsparam_u32 ("uid", Opt_uid), |
|
fsparam_flag ("debug", Opt_debug), |
|
{} |
|
}; |
|
|
|
static int spufs_show_options(struct seq_file *m, struct dentry *root) |
|
{ |
|
struct spufs_sb_info *sbi = spufs_get_sb_info(root->d_sb); |
|
struct inode *inode = root->d_inode; |
|
|
|
if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID)) |
|
seq_printf(m, ",uid=%u", |
|
from_kuid_munged(&init_user_ns, inode->i_uid)); |
|
if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID)) |
|
seq_printf(m, ",gid=%u", |
|
from_kgid_munged(&init_user_ns, inode->i_gid)); |
|
if ((inode->i_mode & S_IALLUGO) != 0775) |
|
seq_printf(m, ",mode=%o", inode->i_mode); |
|
if (sbi->debug) |
|
seq_puts(m, ",debug"); |
|
return 0; |
|
} |
|
|
|
static int spufs_parse_param(struct fs_context *fc, struct fs_parameter *param) |
|
{ |
|
struct spufs_fs_context *ctx = fc->fs_private; |
|
struct spufs_sb_info *sbi = fc->s_fs_info; |
|
struct fs_parse_result result; |
|
kuid_t uid; |
|
kgid_t gid; |
|
int opt; |
|
|
|
opt = fs_parse(fc, spufs_fs_parameters, param, &result); |
|
if (opt < 0) |
|
return opt; |
|
|
|
switch (opt) { |
|
case Opt_uid: |
|
uid = make_kuid(current_user_ns(), result.uint_32); |
|
if (!uid_valid(uid)) |
|
return invalf(fc, "Unknown uid"); |
|
ctx->uid = uid; |
|
break; |
|
case Opt_gid: |
|
gid = make_kgid(current_user_ns(), result.uint_32); |
|
if (!gid_valid(gid)) |
|
return invalf(fc, "Unknown gid"); |
|
ctx->gid = gid; |
|
break; |
|
case Opt_mode: |
|
ctx->mode = result.uint_32 & S_IALLUGO; |
|
break; |
|
case Opt_debug: |
|
sbi->debug = true; |
|
break; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void spufs_exit_isolated_loader(void) |
|
{ |
|
free_pages((unsigned long) isolated_loader, |
|
get_order(isolated_loader_size)); |
|
} |
|
|
|
static void |
|
spufs_init_isolated_loader(void) |
|
{ |
|
struct device_node *dn; |
|
const char *loader; |
|
int size; |
|
|
|
dn = of_find_node_by_path("/spu-isolation"); |
|
if (!dn) |
|
return; |
|
|
|
loader = of_get_property(dn, "loader", &size); |
|
if (!loader) |
|
return; |
|
|
|
/* the loader must be align on a 16 byte boundary */ |
|
isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); |
|
if (!isolated_loader) |
|
return; |
|
|
|
isolated_loader_size = size; |
|
memcpy(isolated_loader, loader, size); |
|
printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); |
|
} |
|
|
|
static int spufs_create_root(struct super_block *sb, struct fs_context *fc) |
|
{ |
|
struct spufs_fs_context *ctx = fc->fs_private; |
|
struct inode *inode; |
|
|
|
if (!spu_management_ops) |
|
return -ENODEV; |
|
|
|
inode = spufs_new_inode(sb, S_IFDIR | ctx->mode); |
|
if (!inode) |
|
return -ENOMEM; |
|
|
|
inode->i_uid = ctx->uid; |
|
inode->i_gid = ctx->gid; |
|
inode->i_op = &simple_dir_inode_operations; |
|
inode->i_fop = &simple_dir_operations; |
|
SPUFS_I(inode)->i_ctx = NULL; |
|
inc_nlink(inode); |
|
|
|
sb->s_root = d_make_root(inode); |
|
if (!sb->s_root) |
|
return -ENOMEM; |
|
return 0; |
|
} |
|
|
|
static const struct super_operations spufs_ops = { |
|
.alloc_inode = spufs_alloc_inode, |
|
.free_inode = spufs_free_inode, |
|
.statfs = simple_statfs, |
|
.evict_inode = spufs_evict_inode, |
|
.show_options = spufs_show_options, |
|
}; |
|
|
|
static int spufs_fill_super(struct super_block *sb, struct fs_context *fc) |
|
{ |
|
sb->s_maxbytes = MAX_LFS_FILESIZE; |
|
sb->s_blocksize = PAGE_SIZE; |
|
sb->s_blocksize_bits = PAGE_SHIFT; |
|
sb->s_magic = SPUFS_MAGIC; |
|
sb->s_op = &spufs_ops; |
|
|
|
return spufs_create_root(sb, fc); |
|
} |
|
|
|
static int spufs_get_tree(struct fs_context *fc) |
|
{ |
|
return get_tree_single(fc, spufs_fill_super); |
|
} |
|
|
|
static void spufs_free_fc(struct fs_context *fc) |
|
{ |
|
kfree(fc->s_fs_info); |
|
} |
|
|
|
static const struct fs_context_operations spufs_context_ops = { |
|
.free = spufs_free_fc, |
|
.parse_param = spufs_parse_param, |
|
.get_tree = spufs_get_tree, |
|
}; |
|
|
|
static int spufs_init_fs_context(struct fs_context *fc) |
|
{ |
|
struct spufs_fs_context *ctx; |
|
struct spufs_sb_info *sbi; |
|
|
|
ctx = kzalloc(sizeof(struct spufs_fs_context), GFP_KERNEL); |
|
if (!ctx) |
|
goto nomem; |
|
|
|
sbi = kzalloc(sizeof(struct spufs_sb_info), GFP_KERNEL); |
|
if (!sbi) |
|
goto nomem_ctx; |
|
|
|
ctx->uid = current_uid(); |
|
ctx->gid = current_gid(); |
|
ctx->mode = 0755; |
|
|
|
fc->fs_private = ctx; |
|
fc->s_fs_info = sbi; |
|
fc->ops = &spufs_context_ops; |
|
return 0; |
|
|
|
nomem_ctx: |
|
kfree(ctx); |
|
nomem: |
|
return -ENOMEM; |
|
} |
|
|
|
static struct file_system_type spufs_type = { |
|
.owner = THIS_MODULE, |
|
.name = "spufs", |
|
.init_fs_context = spufs_init_fs_context, |
|
.parameters = spufs_fs_parameters, |
|
.kill_sb = kill_litter_super, |
|
}; |
|
MODULE_ALIAS_FS("spufs"); |
|
|
|
static int __init spufs_init(void) |
|
{ |
|
int ret; |
|
|
|
ret = -ENODEV; |
|
if (!spu_management_ops) |
|
goto out; |
|
|
|
ret = -ENOMEM; |
|
spufs_inode_cache = kmem_cache_create("spufs_inode_cache", |
|
sizeof(struct spufs_inode_info), 0, |
|
SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, spufs_init_once); |
|
|
|
if (!spufs_inode_cache) |
|
goto out; |
|
ret = spu_sched_init(); |
|
if (ret) |
|
goto out_cache; |
|
ret = register_spu_syscalls(&spufs_calls); |
|
if (ret) |
|
goto out_sched; |
|
ret = register_filesystem(&spufs_type); |
|
if (ret) |
|
goto out_syscalls; |
|
|
|
spufs_init_isolated_loader(); |
|
|
|
return 0; |
|
|
|
out_syscalls: |
|
unregister_spu_syscalls(&spufs_calls); |
|
out_sched: |
|
spu_sched_exit(); |
|
out_cache: |
|
kmem_cache_destroy(spufs_inode_cache); |
|
out: |
|
return ret; |
|
} |
|
module_init(spufs_init); |
|
|
|
static void __exit spufs_exit(void) |
|
{ |
|
spu_sched_exit(); |
|
spufs_exit_isolated_loader(); |
|
unregister_spu_syscalls(&spufs_calls); |
|
unregister_filesystem(&spufs_type); |
|
kmem_cache_destroy(spufs_inode_cache); |
|
} |
|
module_exit(spufs_exit); |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_AUTHOR("Arnd Bergmann <[email protected]>"); |
|
|
|
|