14ac91378SJan Blunck 267207b96SArnd Bergmann /* 367207b96SArnd Bergmann * SPU file system 467207b96SArnd Bergmann * 567207b96SArnd Bergmann * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 667207b96SArnd Bergmann * 767207b96SArnd Bergmann * Author: Arnd Bergmann <arndb@de.ibm.com> 867207b96SArnd Bergmann * 967207b96SArnd Bergmann * This program is free software; you can redistribute it and/or modify 1067207b96SArnd Bergmann * it under the terms of the GNU General Public License as published by 1167207b96SArnd Bergmann * the Free Software Foundation; either version 2, or (at your option) 1267207b96SArnd Bergmann * any later version. 1367207b96SArnd Bergmann * 1467207b96SArnd Bergmann * This program is distributed in the hope that it will be useful, 1567207b96SArnd Bergmann * but WITHOUT ANY WARRANTY; without even the implied warranty of 1667207b96SArnd Bergmann * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1767207b96SArnd Bergmann * GNU General Public License for more details. 1867207b96SArnd Bergmann * 1967207b96SArnd Bergmann * You should have received a copy of the GNU General Public License 2067207b96SArnd Bergmann * along with this program; if not, write to the Free Software 2167207b96SArnd Bergmann * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 2267207b96SArnd Bergmann */ 2367207b96SArnd Bergmann 2467207b96SArnd Bergmann #include <linux/file.h> 2567207b96SArnd Bergmann #include <linux/fs.h> 26826be063SChristoph Hellwig #include <linux/fsnotify.h> 2767207b96SArnd Bergmann #include <linux/backing-dev.h> 2867207b96SArnd Bergmann #include <linux/init.h> 2967207b96SArnd Bergmann #include <linux/ioctl.h> 3067207b96SArnd Bergmann #include <linux/module.h> 31346f4d3cSArnd Bergmann #include <linux/mount.h> 3267207b96SArnd Bergmann #include <linux/namei.h> 3367207b96SArnd Bergmann #include <linux/pagemap.h> 3467207b96SArnd Bergmann #include <linux/poll.h> 3567207b96SArnd Bergmann #include <linux/slab.h> 3667207b96SArnd Bergmann #include <linux/parser.h> 3767207b96SArnd Bergmann 380afacde3Sarnd@arndb.de #include <asm/prom.h> 3967207b96SArnd Bergmann #include <asm/spu.h> 40ccf17e9dSJeremy Kerr #include <asm/spu_priv1.h> 4167207b96SArnd Bergmann #include <asm/uaccess.h> 4267207b96SArnd Bergmann 4367207b96SArnd Bergmann #include "spufs.h" 4467207b96SArnd Bergmann 452c3e4787SJeremy Kerr struct spufs_sb_info { 462c3e4787SJeremy Kerr int debug; 472c3e4787SJeremy Kerr }; 482c3e4787SJeremy Kerr 49e18b890bSChristoph Lameter static struct kmem_cache *spufs_inode_cache; 50c6730ed4SJeremy Kerr char *isolated_loader; 518b0d3121SSebastian Siewior static int isolated_loader_size; 5267207b96SArnd Bergmann 532c3e4787SJeremy Kerr static struct spufs_sb_info *spufs_get_sb_info(struct super_block *sb) 542c3e4787SJeremy Kerr { 552c3e4787SJeremy Kerr return sb->s_fs_info; 562c3e4787SJeremy Kerr } 572c3e4787SJeremy Kerr 5867207b96SArnd Bergmann static struct inode * 5967207b96SArnd Bergmann spufs_alloc_inode(struct super_block *sb) 6067207b96SArnd Bergmann { 6167207b96SArnd Bergmann struct spufs_inode_info *ei; 6267207b96SArnd Bergmann 63e94b1766SChristoph Lameter ei = kmem_cache_alloc(spufs_inode_cache, GFP_KERNEL); 6467207b96SArnd Bergmann if (!ei) 6567207b96SArnd Bergmann return NULL; 666263203eSArnd Bergmann 676263203eSArnd Bergmann ei->i_gang = NULL; 686263203eSArnd Bergmann ei->i_ctx = NULL; 6943c2bbd9SChristoph Hellwig ei->i_openers = 0; 706263203eSArnd Bergmann 7167207b96SArnd Bergmann return &ei->vfs_inode; 7267207b96SArnd Bergmann } 7367207b96SArnd Bergmann 74fa0d7e3dSNick Piggin static void spufs_i_callback(struct rcu_head *head) 7567207b96SArnd Bergmann { 76fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 77fa0d7e3dSNick Piggin INIT_LIST_HEAD(&inode->i_dentry); 7867207b96SArnd Bergmann kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); 7967207b96SArnd Bergmann } 8067207b96SArnd Bergmann 81fa0d7e3dSNick Piggin static void spufs_destroy_inode(struct inode *inode) 82fa0d7e3dSNick Piggin { 83fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, spufs_i_callback); 84fa0d7e3dSNick Piggin } 85fa0d7e3dSNick Piggin 8667207b96SArnd Bergmann static void 8751cc5068SAlexey Dobriyan spufs_init_once(void *p) 8867207b96SArnd Bergmann { 8967207b96SArnd Bergmann struct spufs_inode_info *ei = p; 9067207b96SArnd Bergmann 9167207b96SArnd Bergmann inode_init_once(&ei->vfs_inode); 9267207b96SArnd Bergmann } 9367207b96SArnd Bergmann 9467207b96SArnd Bergmann static struct inode * 9567207b96SArnd Bergmann spufs_new_inode(struct super_block *sb, int mode) 9667207b96SArnd Bergmann { 9767207b96SArnd Bergmann struct inode *inode; 9867207b96SArnd Bergmann 9967207b96SArnd Bergmann inode = new_inode(sb); 10067207b96SArnd Bergmann if (!inode) 10167207b96SArnd Bergmann goto out; 10267207b96SArnd Bergmann 10367207b96SArnd Bergmann inode->i_mode = mode; 1041330deb0SDavid Howells inode->i_uid = current_fsuid(); 1051330deb0SDavid Howells inode->i_gid = current_fsgid(); 10667207b96SArnd Bergmann inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 10767207b96SArnd Bergmann out: 10867207b96SArnd Bergmann return inode; 10967207b96SArnd Bergmann } 11067207b96SArnd Bergmann 11167207b96SArnd Bergmann static int 11267207b96SArnd Bergmann spufs_setattr(struct dentry *dentry, struct iattr *attr) 11367207b96SArnd Bergmann { 11467207b96SArnd Bergmann struct inode *inode = dentry->d_inode; 11567207b96SArnd Bergmann 11667207b96SArnd Bergmann if ((attr->ia_valid & ATTR_SIZE) && 11767207b96SArnd Bergmann (attr->ia_size != inode->i_size)) 11867207b96SArnd Bergmann return -EINVAL; 1191025774cSChristoph Hellwig setattr_copy(inode, attr); 1201025774cSChristoph Hellwig mark_inode_dirty(inode); 1211025774cSChristoph Hellwig return 0; 12267207b96SArnd Bergmann } 12367207b96SArnd Bergmann 12467207b96SArnd Bergmann 12567207b96SArnd Bergmann static int 12667207b96SArnd Bergmann spufs_new_file(struct super_block *sb, struct dentry *dentry, 12799ac48f5SArjan van de Ven const struct file_operations *fops, int mode, 12823d893f5SJeremy Kerr size_t size, struct spu_context *ctx) 12967207b96SArnd Bergmann { 1306e1d5dccSAlexey Dobriyan static const struct inode_operations spufs_file_iops = { 13167207b96SArnd Bergmann .setattr = spufs_setattr, 13267207b96SArnd Bergmann }; 13367207b96SArnd Bergmann struct inode *inode; 13467207b96SArnd Bergmann int ret; 13567207b96SArnd Bergmann 13667207b96SArnd Bergmann ret = -ENOSPC; 13767207b96SArnd Bergmann inode = spufs_new_inode(sb, S_IFREG | mode); 13867207b96SArnd Bergmann if (!inode) 13967207b96SArnd Bergmann goto out; 14067207b96SArnd Bergmann 14167207b96SArnd Bergmann ret = 0; 14267207b96SArnd Bergmann inode->i_op = &spufs_file_iops; 14367207b96SArnd Bergmann inode->i_fop = fops; 14423d893f5SJeremy Kerr inode->i_size = size; 1458e18e294STheodore Ts'o inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); 14667207b96SArnd Bergmann d_add(dentry, inode); 14767207b96SArnd Bergmann out: 14867207b96SArnd Bergmann return ret; 14967207b96SArnd Bergmann } 15067207b96SArnd Bergmann 15167207b96SArnd Bergmann static void 1520f3f63a4SAl Viro spufs_evict_inode(struct inode *inode) 15367207b96SArnd Bergmann { 1546263203eSArnd Bergmann struct spufs_inode_info *ei = SPUFS_I(inode); 1550f3f63a4SAl Viro end_writeback(inode); 1566263203eSArnd Bergmann if (ei->i_ctx) 1576263203eSArnd Bergmann put_spu_context(ei->i_ctx); 1586263203eSArnd Bergmann if (ei->i_gang) 1596263203eSArnd Bergmann put_spu_gang(ei->i_gang); 16067207b96SArnd Bergmann } 16167207b96SArnd Bergmann 1623f51dd91SArnd Bergmann static void spufs_prune_dir(struct dentry *dir) 1633f51dd91SArnd Bergmann { 1643f51dd91SArnd Bergmann struct dentry *dentry, *tmp; 1656263203eSArnd Bergmann 1661b1dcc1bSJes Sorensen mutex_lock(&dir->d_inode->i_mutex); 167c3a9aea7SAndrew Morton list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { 1683f51dd91SArnd Bergmann spin_lock(&dentry->d_lock); 1693f51dd91SArnd Bergmann if (!(d_unhashed(dentry)) && dentry->d_inode) { 170dc0474beSNick Piggin dget_dlock(dentry); 1713f51dd91SArnd Bergmann __d_drop(dentry); 1723f51dd91SArnd Bergmann spin_unlock(&dentry->d_lock); 1733f51dd91SArnd Bergmann simple_unlink(dir->d_inode, dentry); 174b5c84bf6SNick Piggin /* XXX: what was dcache_lock protecting here? Other 175da502956SNick Piggin * filesystems (IB, configfs) release dcache_lock 176da502956SNick Piggin * before unlink */ 1773f51dd91SArnd Bergmann dput(dentry); 1783f51dd91SArnd Bergmann } else { 1793f51dd91SArnd Bergmann spin_unlock(&dentry->d_lock); 1803f51dd91SArnd Bergmann } 1813f51dd91SArnd Bergmann } 1823f51dd91SArnd Bergmann shrink_dcache_parent(dir); 1831b1dcc1bSJes Sorensen mutex_unlock(&dir->d_inode->i_mutex); 1843f51dd91SArnd Bergmann } 1853f51dd91SArnd Bergmann 1866263203eSArnd Bergmann /* Caller must hold parent->i_mutex */ 1876263203eSArnd Bergmann static int spufs_rmdir(struct inode *parent, struct dentry *dir) 1883f51dd91SArnd Bergmann { 1893f51dd91SArnd Bergmann /* remove all entries */ 1906263203eSArnd Bergmann spufs_prune_dir(dir); 191c443acabSJeremy Kerr d_drop(dir); 1923f51dd91SArnd Bergmann 1936263203eSArnd Bergmann return simple_rmdir(parent, dir); 1943f51dd91SArnd Bergmann } 1953f51dd91SArnd Bergmann 19674254647SJeremy Kerr static int spufs_fill_dir(struct dentry *dir, 19774254647SJeremy Kerr const struct spufs_tree_descr *files, int mode, 19874254647SJeremy Kerr struct spu_context *ctx) 19967207b96SArnd Bergmann { 20087873c86SSebastian Siewior struct dentry *dentry, *tmp; 20167207b96SArnd Bergmann int ret; 20267207b96SArnd Bergmann 20367207b96SArnd Bergmann while (files->name && files->name[0]) { 20467207b96SArnd Bergmann ret = -ENOMEM; 20567207b96SArnd Bergmann dentry = d_alloc_name(dir, files->name); 20667207b96SArnd Bergmann if (!dentry) 20767207b96SArnd Bergmann goto out; 20867207b96SArnd Bergmann ret = spufs_new_file(dir->d_sb, dentry, files->ops, 20923d893f5SJeremy Kerr files->mode & mode, files->size, ctx); 21067207b96SArnd Bergmann if (ret) 21167207b96SArnd Bergmann goto out; 21267207b96SArnd Bergmann files++; 21367207b96SArnd Bergmann } 21467207b96SArnd Bergmann return 0; 21567207b96SArnd Bergmann out: 21687873c86SSebastian Siewior /* 21787873c86SSebastian Siewior * remove all children from dir. dir->inode is not set so don't 21887873c86SSebastian Siewior * just simply use spufs_prune_dir() and panic afterwards :) 21987873c86SSebastian Siewior * dput() looks like it will do the right thing: 22087873c86SSebastian Siewior * - dec parent's ref counter 22187873c86SSebastian Siewior * - remove child from parent's child list 22287873c86SSebastian Siewior * - free child's inode if possible 22387873c86SSebastian Siewior * - free child 22487873c86SSebastian Siewior */ 22587873c86SSebastian Siewior list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { 22687873c86SSebastian Siewior dput(dentry); 22787873c86SSebastian Siewior } 22887873c86SSebastian Siewior 22987873c86SSebastian Siewior shrink_dcache_parent(dir); 23067207b96SArnd Bergmann return ret; 23167207b96SArnd Bergmann } 23267207b96SArnd Bergmann 23367207b96SArnd Bergmann static int spufs_dir_close(struct inode *inode, struct file *file) 23467207b96SArnd Bergmann { 2350309f02dSMichael Ellerman struct spu_context *ctx; 2366263203eSArnd Bergmann struct inode *parent; 2376263203eSArnd Bergmann struct dentry *dir; 23867207b96SArnd Bergmann int ret; 23967207b96SArnd Bergmann 240b4d1ab58SJosef Sipek dir = file->f_path.dentry; 2416263203eSArnd Bergmann parent = dir->d_parent->d_inode; 2426263203eSArnd Bergmann ctx = SPUFS_I(dir->d_inode)->i_ctx; 243c8ca0633SArnd Bergmann 24402539d71SChristoph Hellwig mutex_lock_nested(&parent->i_mutex, I_MUTEX_PARENT); 2456263203eSArnd Bergmann ret = spufs_rmdir(parent, dir); 2466263203eSArnd Bergmann mutex_unlock(&parent->i_mutex); 24767207b96SArnd Bergmann WARN_ON(ret); 248c8ca0633SArnd Bergmann 2490309f02dSMichael Ellerman /* We have to give up the mm_struct */ 2500309f02dSMichael Ellerman spu_forget(ctx); 2510309f02dSMichael Ellerman 25267207b96SArnd Bergmann return dcache_dir_close(inode, file); 25367207b96SArnd Bergmann } 25467207b96SArnd Bergmann 2555dfe4c96SArjan van de Ven const struct file_operations spufs_context_fops = { 25667207b96SArnd Bergmann .open = dcache_dir_open, 25767207b96SArnd Bergmann .release = spufs_dir_close, 25867207b96SArnd Bergmann .llseek = dcache_dir_lseek, 25967207b96SArnd Bergmann .read = generic_read_dir, 26067207b96SArnd Bergmann .readdir = dcache_readdir, 2611b061d92SChristoph Hellwig .fsync = noop_fsync, 26267207b96SArnd Bergmann }; 263bf1ab978SDwayne Grant McConnell EXPORT_SYMBOL_GPL(spufs_context_fops); 26467207b96SArnd Bergmann 26567207b96SArnd Bergmann static int 2669add11daSArnd Bergmann spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 2679add11daSArnd Bergmann int mode) 26867207b96SArnd Bergmann { 26967207b96SArnd Bergmann int ret; 27067207b96SArnd Bergmann struct inode *inode; 27167207b96SArnd Bergmann struct spu_context *ctx; 27267207b96SArnd Bergmann 27367207b96SArnd Bergmann ret = -ENOSPC; 27467207b96SArnd Bergmann inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 27567207b96SArnd Bergmann if (!inode) 27667207b96SArnd Bergmann goto out; 27767207b96SArnd Bergmann 27867207b96SArnd Bergmann if (dir->i_mode & S_ISGID) { 27967207b96SArnd Bergmann inode->i_gid = dir->i_gid; 28067207b96SArnd Bergmann inode->i_mode &= S_ISGID; 28167207b96SArnd Bergmann } 2826263203eSArnd Bergmann ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 28367207b96SArnd Bergmann SPUFS_I(inode)->i_ctx = ctx; 28467207b96SArnd Bergmann if (!ctx) 28567207b96SArnd Bergmann goto out_iput; 28667207b96SArnd Bergmann 2879add11daSArnd Bergmann ctx->flags = flags; 288b8c295f9SJeremy Kerr inode->i_op = &simple_dir_inode_operations; 28967207b96SArnd Bergmann inode->i_fop = &simple_dir_operations; 2905737edd1SMark Nutter if (flags & SPU_CREATE_NOSCHED) 2915737edd1SMark Nutter ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 2925737edd1SMark Nutter mode, ctx); 2935737edd1SMark Nutter else 29467207b96SArnd Bergmann ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 2955737edd1SMark Nutter 29667207b96SArnd Bergmann if (ret) 29767207b96SArnd Bergmann goto out_free_ctx; 29867207b96SArnd Bergmann 2992c3e4787SJeremy Kerr if (spufs_get_sb_info(dir->i_sb)->debug) 3002c3e4787SJeremy Kerr ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, 3012c3e4787SJeremy Kerr mode, ctx); 3022c3e4787SJeremy Kerr 3032c3e4787SJeremy Kerr if (ret) 3042c3e4787SJeremy Kerr goto out_free_ctx; 3052c3e4787SJeremy Kerr 30667207b96SArnd Bergmann d_instantiate(dentry, inode); 30767207b96SArnd Bergmann dget(dentry); 308ba0b996dSJeremy Kerr inc_nlink(dir); 309ba0b996dSJeremy Kerr inc_nlink(dentry->d_inode); 31067207b96SArnd Bergmann goto out; 31167207b96SArnd Bergmann 31267207b96SArnd Bergmann out_free_ctx: 31389df0085SSebastian Siewior spu_forget(ctx); 31467207b96SArnd Bergmann put_spu_context(ctx); 31567207b96SArnd Bergmann out_iput: 31667207b96SArnd Bergmann iput(inode); 31767207b96SArnd Bergmann out: 31867207b96SArnd Bergmann return ret; 31967207b96SArnd Bergmann } 32067207b96SArnd Bergmann 321346f4d3cSArnd Bergmann static int spufs_context_open(struct dentry *dentry, struct vfsmount *mnt) 322346f4d3cSArnd Bergmann { 323346f4d3cSArnd Bergmann int ret; 324346f4d3cSArnd Bergmann struct file *filp; 325346f4d3cSArnd Bergmann 326346f4d3cSArnd Bergmann ret = get_unused_fd(); 327346f4d3cSArnd Bergmann if (ret < 0) { 328346f4d3cSArnd Bergmann dput(dentry); 329346f4d3cSArnd Bergmann mntput(mnt); 330346f4d3cSArnd Bergmann goto out; 331346f4d3cSArnd Bergmann } 332346f4d3cSArnd Bergmann 333745ca247SDavid Howells filp = dentry_open(dentry, mnt, O_RDONLY, current_cred()); 334346f4d3cSArnd Bergmann if (IS_ERR(filp)) { 335346f4d3cSArnd Bergmann put_unused_fd(ret); 336346f4d3cSArnd Bergmann ret = PTR_ERR(filp); 337346f4d3cSArnd Bergmann goto out; 338346f4d3cSArnd Bergmann } 339346f4d3cSArnd Bergmann 340346f4d3cSArnd Bergmann filp->f_op = &spufs_context_fops; 341346f4d3cSArnd Bergmann fd_install(ret, filp); 342346f4d3cSArnd Bergmann out: 343346f4d3cSArnd Bergmann return ret; 344346f4d3cSArnd Bergmann } 345346f4d3cSArnd Bergmann 3468e68e2f2SArnd Bergmann static struct spu_context * 3478e68e2f2SArnd Bergmann spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 3488e68e2f2SArnd Bergmann struct file *filp) 3498e68e2f2SArnd Bergmann { 35058119068SAndre Detsch struct spu_context *tmp, *neighbor, *err; 3518e68e2f2SArnd Bergmann int count, node; 3528e68e2f2SArnd Bergmann int aff_supp; 3538e68e2f2SArnd Bergmann 3548e68e2f2SArnd Bergmann aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 3558e68e2f2SArnd Bergmann struct spu, cbe_list))->aff_list); 3568e68e2f2SArnd Bergmann 3578e68e2f2SArnd Bergmann if (!aff_supp) 3588e68e2f2SArnd Bergmann return ERR_PTR(-EINVAL); 3598e68e2f2SArnd Bergmann 3608e68e2f2SArnd Bergmann if (flags & SPU_CREATE_GANG) 3618e68e2f2SArnd Bergmann return ERR_PTR(-EINVAL); 3628e68e2f2SArnd Bergmann 3638e68e2f2SArnd Bergmann if (flags & SPU_CREATE_AFFINITY_MEM && 3648e68e2f2SArnd Bergmann gang->aff_ref_ctx && 3658e68e2f2SArnd Bergmann gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 3668e68e2f2SArnd Bergmann return ERR_PTR(-EEXIST); 3678e68e2f2SArnd Bergmann 3688e68e2f2SArnd Bergmann if (gang->aff_flags & AFF_MERGED) 3698e68e2f2SArnd Bergmann return ERR_PTR(-EBUSY); 3708e68e2f2SArnd Bergmann 3718e68e2f2SArnd Bergmann neighbor = NULL; 3728e68e2f2SArnd Bergmann if (flags & SPU_CREATE_AFFINITY_SPU) { 3738e68e2f2SArnd Bergmann if (!filp || filp->f_op != &spufs_context_fops) 3748e68e2f2SArnd Bergmann return ERR_PTR(-EINVAL); 3758e68e2f2SArnd Bergmann 3768e68e2f2SArnd Bergmann neighbor = get_spu_context( 3778e68e2f2SArnd Bergmann SPUFS_I(filp->f_dentry->d_inode)->i_ctx); 3788e68e2f2SArnd Bergmann 3798e68e2f2SArnd Bergmann if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 3808e68e2f2SArnd Bergmann !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 3818e68e2f2SArnd Bergmann !list_entry(neighbor->aff_list.next, struct spu_context, 38258119068SAndre Detsch aff_list)->aff_head) { 38358119068SAndre Detsch err = ERR_PTR(-EEXIST); 38458119068SAndre Detsch goto out_put_neighbor; 38558119068SAndre Detsch } 3868e68e2f2SArnd Bergmann 38758119068SAndre Detsch if (gang != neighbor->gang) { 38858119068SAndre Detsch err = ERR_PTR(-EINVAL); 38958119068SAndre Detsch goto out_put_neighbor; 39058119068SAndre Detsch } 3918e68e2f2SArnd Bergmann 3928e68e2f2SArnd Bergmann count = 1; 3938e68e2f2SArnd Bergmann list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 3948e68e2f2SArnd Bergmann count++; 3958e68e2f2SArnd Bergmann if (list_empty(&neighbor->aff_list)) 3968e68e2f2SArnd Bergmann count++; 3978e68e2f2SArnd Bergmann 3988e68e2f2SArnd Bergmann for (node = 0; node < MAX_NUMNODES; node++) { 3998e68e2f2SArnd Bergmann if ((cbe_spu_info[node].n_spus - atomic_read( 4008e68e2f2SArnd Bergmann &cbe_spu_info[node].reserved_spus)) >= count) 4018e68e2f2SArnd Bergmann break; 4028e68e2f2SArnd Bergmann } 4038e68e2f2SArnd Bergmann 40458119068SAndre Detsch if (node == MAX_NUMNODES) { 40558119068SAndre Detsch err = ERR_PTR(-EEXIST); 40658119068SAndre Detsch goto out_put_neighbor; 40758119068SAndre Detsch } 4088e68e2f2SArnd Bergmann } 4098e68e2f2SArnd Bergmann 4108e68e2f2SArnd Bergmann return neighbor; 41158119068SAndre Detsch 41258119068SAndre Detsch out_put_neighbor: 41358119068SAndre Detsch put_spu_context(neighbor); 41458119068SAndre Detsch return err; 4158e68e2f2SArnd Bergmann } 4168e68e2f2SArnd Bergmann 4178e68e2f2SArnd Bergmann static void 4188e68e2f2SArnd Bergmann spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 4198e68e2f2SArnd Bergmann struct spu_context *neighbor) 4208e68e2f2SArnd Bergmann { 4218e68e2f2SArnd Bergmann if (flags & SPU_CREATE_AFFINITY_MEM) 4228e68e2f2SArnd Bergmann ctx->gang->aff_ref_ctx = ctx; 4238e68e2f2SArnd Bergmann 4248e68e2f2SArnd Bergmann if (flags & SPU_CREATE_AFFINITY_SPU) { 4258e68e2f2SArnd Bergmann if (list_empty(&neighbor->aff_list)) { 4268e68e2f2SArnd Bergmann list_add_tail(&neighbor->aff_list, 4278e68e2f2SArnd Bergmann &ctx->gang->aff_list_head); 4288e68e2f2SArnd Bergmann neighbor->aff_head = 1; 4298e68e2f2SArnd Bergmann } 4308e68e2f2SArnd Bergmann 4318e68e2f2SArnd Bergmann if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 4328e68e2f2SArnd Bergmann || list_entry(neighbor->aff_list.next, struct spu_context, 4338e68e2f2SArnd Bergmann aff_list)->aff_head) { 4348e68e2f2SArnd Bergmann list_add(&ctx->aff_list, &neighbor->aff_list); 4358e68e2f2SArnd Bergmann } else { 4368e68e2f2SArnd Bergmann list_add_tail(&ctx->aff_list, &neighbor->aff_list); 4378e68e2f2SArnd Bergmann if (neighbor->aff_head) { 4388e68e2f2SArnd Bergmann neighbor->aff_head = 0; 4398e68e2f2SArnd Bergmann ctx->aff_head = 1; 4408e68e2f2SArnd Bergmann } 4418e68e2f2SArnd Bergmann } 4428e68e2f2SArnd Bergmann 4438e68e2f2SArnd Bergmann if (!ctx->gang->aff_ref_ctx) 4448e68e2f2SArnd Bergmann ctx->gang->aff_ref_ctx = ctx; 4458e68e2f2SArnd Bergmann } 4468e68e2f2SArnd Bergmann } 4478e68e2f2SArnd Bergmann 4488e68e2f2SArnd Bergmann static int 4498e68e2f2SArnd Bergmann spufs_create_context(struct inode *inode, struct dentry *dentry, 4508e68e2f2SArnd Bergmann struct vfsmount *mnt, int flags, int mode, 4518e68e2f2SArnd Bergmann struct file *aff_filp) 4526263203eSArnd Bergmann { 4536263203eSArnd Bergmann int ret; 4548e68e2f2SArnd Bergmann int affinity; 4558e68e2f2SArnd Bergmann struct spu_gang *gang; 4568e68e2f2SArnd Bergmann struct spu_context *neighbor; 4576263203eSArnd Bergmann 4585737edd1SMark Nutter ret = -EPERM; 4595737edd1SMark Nutter if ((flags & SPU_CREATE_NOSCHED) && 4605737edd1SMark Nutter !capable(CAP_SYS_NICE)) 4615737edd1SMark Nutter goto out_unlock; 4625737edd1SMark Nutter 4635737edd1SMark Nutter ret = -EINVAL; 4645737edd1SMark Nutter if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 4655737edd1SMark Nutter == SPU_CREATE_ISOLATE) 4665737edd1SMark Nutter goto out_unlock; 4675737edd1SMark Nutter 468bd2e5f82SJeremy Kerr ret = -ENODEV; 469bd2e5f82SJeremy Kerr if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 470bd2e5f82SJeremy Kerr goto out_unlock; 471bd2e5f82SJeremy Kerr 4728e68e2f2SArnd Bergmann gang = NULL; 4738e68e2f2SArnd Bergmann neighbor = NULL; 4748e68e2f2SArnd Bergmann affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 4758e68e2f2SArnd Bergmann if (affinity) { 4768e68e2f2SArnd Bergmann gang = SPUFS_I(inode)->i_gang; 4778e68e2f2SArnd Bergmann ret = -EINVAL; 4788e68e2f2SArnd Bergmann if (!gang) 4798e68e2f2SArnd Bergmann goto out_unlock; 4808e68e2f2SArnd Bergmann mutex_lock(&gang->aff_mutex); 4818e68e2f2SArnd Bergmann neighbor = spufs_assert_affinity(flags, gang, aff_filp); 4828e68e2f2SArnd Bergmann if (IS_ERR(neighbor)) { 4838e68e2f2SArnd Bergmann ret = PTR_ERR(neighbor); 4848e68e2f2SArnd Bergmann goto out_aff_unlock; 4858e68e2f2SArnd Bergmann } 4868e68e2f2SArnd Bergmann } 4878e68e2f2SArnd Bergmann 4886263203eSArnd Bergmann ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO); 4896263203eSArnd Bergmann if (ret) 4908e68e2f2SArnd Bergmann goto out_aff_unlock; 4918e68e2f2SArnd Bergmann 49258119068SAndre Detsch if (affinity) { 4938e68e2f2SArnd Bergmann spufs_set_affinity(flags, SPUFS_I(dentry->d_inode)->i_ctx, 4948e68e2f2SArnd Bergmann neighbor); 49558119068SAndre Detsch if (neighbor) 49658119068SAndre Detsch put_spu_context(neighbor); 49758119068SAndre Detsch } 4986263203eSArnd Bergmann 4996263203eSArnd Bergmann /* 5006263203eSArnd Bergmann * get references for dget and mntget, will be released 5016263203eSArnd Bergmann * in error path of *_open(). 5026263203eSArnd Bergmann */ 5036263203eSArnd Bergmann ret = spufs_context_open(dget(dentry), mntget(mnt)); 5046263203eSArnd Bergmann if (ret < 0) { 5056263203eSArnd Bergmann WARN_ON(spufs_rmdir(inode, dentry)); 5066747c2eeSKou Ishizaki if (affinity) 5076747c2eeSKou Ishizaki mutex_unlock(&gang->aff_mutex); 5086263203eSArnd Bergmann mutex_unlock(&inode->i_mutex); 5096263203eSArnd Bergmann spu_forget(SPUFS_I(dentry->d_inode)->i_ctx); 5106263203eSArnd Bergmann goto out; 5116263203eSArnd Bergmann } 5126263203eSArnd Bergmann 5138e68e2f2SArnd Bergmann out_aff_unlock: 5148e68e2f2SArnd Bergmann if (affinity) 5158e68e2f2SArnd Bergmann mutex_unlock(&gang->aff_mutex); 5166263203eSArnd Bergmann out_unlock: 5176263203eSArnd Bergmann mutex_unlock(&inode->i_mutex); 5186263203eSArnd Bergmann out: 5196263203eSArnd Bergmann dput(dentry); 5206263203eSArnd Bergmann return ret; 5216263203eSArnd Bergmann } 5226263203eSArnd Bergmann 5236263203eSArnd Bergmann static int 5246263203eSArnd Bergmann spufs_mkgang(struct inode *dir, struct dentry *dentry, int mode) 5256263203eSArnd Bergmann { 5266263203eSArnd Bergmann int ret; 5276263203eSArnd Bergmann struct inode *inode; 5286263203eSArnd Bergmann struct spu_gang *gang; 5296263203eSArnd Bergmann 5306263203eSArnd Bergmann ret = -ENOSPC; 5316263203eSArnd Bergmann inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 5326263203eSArnd Bergmann if (!inode) 5336263203eSArnd Bergmann goto out; 5346263203eSArnd Bergmann 5356263203eSArnd Bergmann ret = 0; 5366263203eSArnd Bergmann if (dir->i_mode & S_ISGID) { 5376263203eSArnd Bergmann inode->i_gid = dir->i_gid; 5386263203eSArnd Bergmann inode->i_mode &= S_ISGID; 5396263203eSArnd Bergmann } 5406263203eSArnd Bergmann gang = alloc_spu_gang(); 5416263203eSArnd Bergmann SPUFS_I(inode)->i_ctx = NULL; 5426263203eSArnd Bergmann SPUFS_I(inode)->i_gang = gang; 5436263203eSArnd Bergmann if (!gang) 5446263203eSArnd Bergmann goto out_iput; 5456263203eSArnd Bergmann 546b8c295f9SJeremy Kerr inode->i_op = &simple_dir_inode_operations; 5476263203eSArnd Bergmann inode->i_fop = &simple_dir_operations; 5486263203eSArnd Bergmann 5496263203eSArnd Bergmann d_instantiate(dentry, inode); 550ba0b996dSJeremy Kerr inc_nlink(dir); 551ba0b996dSJeremy Kerr inc_nlink(dentry->d_inode); 5526263203eSArnd Bergmann return ret; 5536263203eSArnd Bergmann 5546263203eSArnd Bergmann out_iput: 5556263203eSArnd Bergmann iput(inode); 5566263203eSArnd Bergmann out: 5576263203eSArnd Bergmann return ret; 5586263203eSArnd Bergmann } 5596263203eSArnd Bergmann 5606263203eSArnd Bergmann static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt) 5616263203eSArnd Bergmann { 5626263203eSArnd Bergmann int ret; 5636263203eSArnd Bergmann struct file *filp; 5646263203eSArnd Bergmann 5656263203eSArnd Bergmann ret = get_unused_fd(); 5666263203eSArnd Bergmann if (ret < 0) { 5676263203eSArnd Bergmann dput(dentry); 5686263203eSArnd Bergmann mntput(mnt); 5696263203eSArnd Bergmann goto out; 5706263203eSArnd Bergmann } 5716263203eSArnd Bergmann 572745ca247SDavid Howells filp = dentry_open(dentry, mnt, O_RDONLY, current_cred()); 5736263203eSArnd Bergmann if (IS_ERR(filp)) { 5746263203eSArnd Bergmann put_unused_fd(ret); 5756263203eSArnd Bergmann ret = PTR_ERR(filp); 5766263203eSArnd Bergmann goto out; 5776263203eSArnd Bergmann } 5786263203eSArnd Bergmann 579877907d3SJeremy Kerr filp->f_op = &simple_dir_operations; 5806263203eSArnd Bergmann fd_install(ret, filp); 5816263203eSArnd Bergmann out: 5826263203eSArnd Bergmann return ret; 5836263203eSArnd Bergmann } 5846263203eSArnd Bergmann 5856263203eSArnd Bergmann static int spufs_create_gang(struct inode *inode, 5866263203eSArnd Bergmann struct dentry *dentry, 5876263203eSArnd Bergmann struct vfsmount *mnt, int mode) 5886263203eSArnd Bergmann { 5896263203eSArnd Bergmann int ret; 5906263203eSArnd Bergmann 5916263203eSArnd Bergmann ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO); 5926263203eSArnd Bergmann if (ret) 5936263203eSArnd Bergmann goto out; 5946263203eSArnd Bergmann 5956263203eSArnd Bergmann /* 5966263203eSArnd Bergmann * get references for dget and mntget, will be released 5976263203eSArnd Bergmann * in error path of *_open(). 5986263203eSArnd Bergmann */ 5996263203eSArnd Bergmann ret = spufs_gang_open(dget(dentry), mntget(mnt)); 600877907d3SJeremy Kerr if (ret < 0) { 601877907d3SJeremy Kerr int err = simple_rmdir(inode, dentry); 602877907d3SJeremy Kerr WARN_ON(err); 603877907d3SJeremy Kerr } 6046263203eSArnd Bergmann 6056263203eSArnd Bergmann out: 6066263203eSArnd Bergmann mutex_unlock(&inode->i_mutex); 6076263203eSArnd Bergmann dput(dentry); 6086263203eSArnd Bergmann return ret; 6096263203eSArnd Bergmann } 6106263203eSArnd Bergmann 6116263203eSArnd Bergmann 612346f4d3cSArnd Bergmann static struct file_system_type spufs_type; 613346f4d3cSArnd Bergmann 614*1ba10681SAl Viro long spufs_create(struct path *path, struct dentry *dentry, 615*1ba10681SAl Viro unsigned int flags, mode_t mode, struct file *filp) 61667207b96SArnd Bergmann { 61767207b96SArnd Bergmann int ret; 61867207b96SArnd Bergmann 61967207b96SArnd Bergmann ret = -EINVAL; 6206263203eSArnd Bergmann /* check if we are on spufs */ 621*1ba10681SAl Viro if (path->dentry->d_sb->s_type != &spufs_type) 62267207b96SArnd Bergmann goto out; 62367207b96SArnd Bergmann 6246263203eSArnd Bergmann /* don't accept undefined flags */ 6259add11daSArnd Bergmann if (flags & (~SPU_CREATE_FLAG_ALL)) 626c9832948Sarnd@arndb.de goto out; 627c9832948Sarnd@arndb.de 6286263203eSArnd Bergmann /* only threads can be underneath a gang */ 629*1ba10681SAl Viro if (path->dentry != path->dentry->d_sb->s_root) { 6306263203eSArnd Bergmann if ((flags & SPU_CREATE_GANG) || 631*1ba10681SAl Viro !SPUFS_I(path->dentry->d_inode)->i_gang) 6326263203eSArnd Bergmann goto out; 6336263203eSArnd Bergmann } 6346263203eSArnd Bergmann 635ce3b0f8dSAl Viro mode &= ~current_umask(); 63667207b96SArnd Bergmann 6376263203eSArnd Bergmann if (flags & SPU_CREATE_GANG) 638*1ba10681SAl Viro ret = spufs_create_gang(path->dentry->d_inode, 639*1ba10681SAl Viro dentry, path->mnt, mode); 6406263203eSArnd Bergmann else 641*1ba10681SAl Viro ret = spufs_create_context(path->dentry->d_inode, 642*1ba10681SAl Viro dentry, path->mnt, flags, mode, 6434ac91378SJan Blunck filp); 644826be063SChristoph Hellwig if (ret >= 0) 645*1ba10681SAl Viro fsnotify_mkdir(path->dentry->d_inode, dentry); 646826be063SChristoph Hellwig return ret; 64767207b96SArnd Bergmann 64867207b96SArnd Bergmann out: 649*1ba10681SAl Viro mutex_unlock(&path->dentry->d_inode->i_mutex); 65067207b96SArnd Bergmann return ret; 65167207b96SArnd Bergmann } 65267207b96SArnd Bergmann 65367207b96SArnd Bergmann /* File system initialization */ 65467207b96SArnd Bergmann enum { 6552c3e4787SJeremy Kerr Opt_uid, Opt_gid, Opt_mode, Opt_debug, Opt_err, 65667207b96SArnd Bergmann }; 65767207b96SArnd Bergmann 658a447c093SSteven Whitehouse static const match_table_t spufs_tokens = { 65967207b96SArnd Bergmann { Opt_uid, "uid=%d" }, 66067207b96SArnd Bergmann { Opt_gid, "gid=%d" }, 661f11f5ee7SJeremy Kerr { Opt_mode, "mode=%o" }, 6622c3e4787SJeremy Kerr { Opt_debug, "debug" }, 66367207b96SArnd Bergmann { Opt_err, NULL }, 66467207b96SArnd Bergmann }; 66567207b96SArnd Bergmann 66667207b96SArnd Bergmann static int 6672c3e4787SJeremy Kerr spufs_parse_options(struct super_block *sb, char *options, struct inode *root) 66867207b96SArnd Bergmann { 66967207b96SArnd Bergmann char *p; 67067207b96SArnd Bergmann substring_t args[MAX_OPT_ARGS]; 67167207b96SArnd Bergmann 67267207b96SArnd Bergmann while ((p = strsep(&options, ",")) != NULL) { 67367207b96SArnd Bergmann int token, option; 67467207b96SArnd Bergmann 67567207b96SArnd Bergmann if (!*p) 67667207b96SArnd Bergmann continue; 67767207b96SArnd Bergmann 67867207b96SArnd Bergmann token = match_token(p, spufs_tokens, args); 67967207b96SArnd Bergmann switch (token) { 68067207b96SArnd Bergmann case Opt_uid: 68167207b96SArnd Bergmann if (match_int(&args[0], &option)) 68267207b96SArnd Bergmann return 0; 68367207b96SArnd Bergmann root->i_uid = option; 68467207b96SArnd Bergmann break; 68567207b96SArnd Bergmann case Opt_gid: 68667207b96SArnd Bergmann if (match_int(&args[0], &option)) 68767207b96SArnd Bergmann return 0; 68867207b96SArnd Bergmann root->i_gid = option; 68967207b96SArnd Bergmann break; 690f11f5ee7SJeremy Kerr case Opt_mode: 691f11f5ee7SJeremy Kerr if (match_octal(&args[0], &option)) 692f11f5ee7SJeremy Kerr return 0; 693f11f5ee7SJeremy Kerr root->i_mode = option | S_IFDIR; 694f11f5ee7SJeremy Kerr break; 6952c3e4787SJeremy Kerr case Opt_debug: 6962c3e4787SJeremy Kerr spufs_get_sb_info(sb)->debug = 1; 6972c3e4787SJeremy Kerr break; 69867207b96SArnd Bergmann default: 69967207b96SArnd Bergmann return 0; 70067207b96SArnd Bergmann } 70167207b96SArnd Bergmann } 70267207b96SArnd Bergmann return 1; 70367207b96SArnd Bergmann } 70467207b96SArnd Bergmann 705db1384b4SAkinobu Mita static void spufs_exit_isolated_loader(void) 706db1384b4SAkinobu Mita { 7078b0d3121SSebastian Siewior free_pages((unsigned long) isolated_loader, 7088b0d3121SSebastian Siewior get_order(isolated_loader_size)); 709db1384b4SAkinobu Mita } 710db1384b4SAkinobu Mita 7110afacde3Sarnd@arndb.de static void 7120afacde3Sarnd@arndb.de spufs_init_isolated_loader(void) 7130afacde3Sarnd@arndb.de { 7140afacde3Sarnd@arndb.de struct device_node *dn; 7150afacde3Sarnd@arndb.de const char *loader; 7160afacde3Sarnd@arndb.de int size; 7170afacde3Sarnd@arndb.de 7180afacde3Sarnd@arndb.de dn = of_find_node_by_path("/spu-isolation"); 7190afacde3Sarnd@arndb.de if (!dn) 7200afacde3Sarnd@arndb.de return; 7210afacde3Sarnd@arndb.de 722e2eb6392SStephen Rothwell loader = of_get_property(dn, "loader", &size); 7230afacde3Sarnd@arndb.de if (!loader) 7240afacde3Sarnd@arndb.de return; 7250afacde3Sarnd@arndb.de 7268b0d3121SSebastian Siewior /* the loader must be align on a 16 byte boundary */ 7278b0d3121SSebastian Siewior isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 7280afacde3Sarnd@arndb.de if (!isolated_loader) 7290afacde3Sarnd@arndb.de return; 7300afacde3Sarnd@arndb.de 7318b0d3121SSebastian Siewior isolated_loader_size = size; 7320afacde3Sarnd@arndb.de memcpy(isolated_loader, loader, size); 7330afacde3Sarnd@arndb.de printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 7340afacde3Sarnd@arndb.de } 7350afacde3Sarnd@arndb.de 73667207b96SArnd Bergmann static int 7378b3d6663SArnd Bergmann spufs_create_root(struct super_block *sb, void *data) 7388b3d6663SArnd Bergmann { 73967207b96SArnd Bergmann struct inode *inode; 74067207b96SArnd Bergmann int ret; 74167207b96SArnd Bergmann 7428f18a158SArnd Bergmann ret = -ENODEV; 7438f18a158SArnd Bergmann if (!spu_management_ops) 7448f18a158SArnd Bergmann goto out; 7458f18a158SArnd Bergmann 74667207b96SArnd Bergmann ret = -ENOMEM; 74767207b96SArnd Bergmann inode = spufs_new_inode(sb, S_IFDIR | 0775); 74867207b96SArnd Bergmann if (!inode) 74967207b96SArnd Bergmann goto out; 75067207b96SArnd Bergmann 751b8c295f9SJeremy Kerr inode->i_op = &simple_dir_inode_operations; 75267207b96SArnd Bergmann inode->i_fop = &simple_dir_operations; 75367207b96SArnd Bergmann SPUFS_I(inode)->i_ctx = NULL; 754e2ed6e4dSJeremy Kerr inc_nlink(inode); 75567207b96SArnd Bergmann 75667207b96SArnd Bergmann ret = -EINVAL; 7572c3e4787SJeremy Kerr if (!spufs_parse_options(sb, data, inode)) 75867207b96SArnd Bergmann goto out_iput; 75967207b96SArnd Bergmann 76067207b96SArnd Bergmann ret = -ENOMEM; 76167207b96SArnd Bergmann sb->s_root = d_alloc_root(inode); 76267207b96SArnd Bergmann if (!sb->s_root) 76367207b96SArnd Bergmann goto out_iput; 76467207b96SArnd Bergmann 76567207b96SArnd Bergmann return 0; 76667207b96SArnd Bergmann out_iput: 76767207b96SArnd Bergmann iput(inode); 76867207b96SArnd Bergmann out: 76967207b96SArnd Bergmann return ret; 77067207b96SArnd Bergmann } 77167207b96SArnd Bergmann 77267207b96SArnd Bergmann static int 77367207b96SArnd Bergmann spufs_fill_super(struct super_block *sb, void *data, int silent) 77467207b96SArnd Bergmann { 7752c3e4787SJeremy Kerr struct spufs_sb_info *info; 776b87221deSAlexey Dobriyan static const struct super_operations s_ops = { 77767207b96SArnd Bergmann .alloc_inode = spufs_alloc_inode, 77867207b96SArnd Bergmann .destroy_inode = spufs_destroy_inode, 77967207b96SArnd Bergmann .statfs = simple_statfs, 7800f3f63a4SAl Viro .evict_inode = spufs_evict_inode, 78190d09e14SMiklos Szeredi .show_options = generic_show_options, 78267207b96SArnd Bergmann }; 78367207b96SArnd Bergmann 78490d09e14SMiklos Szeredi save_mount_options(sb, data); 78590d09e14SMiklos Szeredi 7862c3e4787SJeremy Kerr info = kzalloc(sizeof(*info), GFP_KERNEL); 7872c3e4787SJeremy Kerr if (!info) 7882c3e4787SJeremy Kerr return -ENOMEM; 7892c3e4787SJeremy Kerr 79067207b96SArnd Bergmann sb->s_maxbytes = MAX_LFS_FILESIZE; 79167207b96SArnd Bergmann sb->s_blocksize = PAGE_CACHE_SIZE; 79267207b96SArnd Bergmann sb->s_blocksize_bits = PAGE_CACHE_SHIFT; 79367207b96SArnd Bergmann sb->s_magic = SPUFS_MAGIC; 79467207b96SArnd Bergmann sb->s_op = &s_ops; 7952c3e4787SJeremy Kerr sb->s_fs_info = info; 79667207b96SArnd Bergmann 79767207b96SArnd Bergmann return spufs_create_root(sb, data); 79867207b96SArnd Bergmann } 79967207b96SArnd Bergmann 800fc14f2feSAl Viro static struct dentry * 801fc14f2feSAl Viro spufs_mount(struct file_system_type *fstype, int flags, 802fc14f2feSAl Viro const char *name, void *data) 80367207b96SArnd Bergmann { 804fc14f2feSAl Viro return mount_single(fstype, flags, data, spufs_fill_super); 80567207b96SArnd Bergmann } 80667207b96SArnd Bergmann 80767207b96SArnd Bergmann static struct file_system_type spufs_type = { 80867207b96SArnd Bergmann .owner = THIS_MODULE, 80967207b96SArnd Bergmann .name = "spufs", 810fc14f2feSAl Viro .mount = spufs_mount, 81167207b96SArnd Bergmann .kill_sb = kill_litter_super, 81267207b96SArnd Bergmann }; 81367207b96SArnd Bergmann 814e78b47a5SArnd Bergmann static int __init spufs_init(void) 81567207b96SArnd Bergmann { 81667207b96SArnd Bergmann int ret; 817bf1ab978SDwayne Grant McConnell 818ccf17e9dSJeremy Kerr ret = -ENODEV; 819ccf17e9dSJeremy Kerr if (!spu_management_ops) 820ccf17e9dSJeremy Kerr goto out; 821ccf17e9dSJeremy Kerr 82267207b96SArnd Bergmann ret = -ENOMEM; 82367207b96SArnd Bergmann spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 82467207b96SArnd Bergmann sizeof(struct spufs_inode_info), 0, 82520c2df83SPaul Mundt SLAB_HWCACHE_ALIGN, spufs_init_once); 82667207b96SArnd Bergmann 82767207b96SArnd Bergmann if (!spufs_inode_cache) 82867207b96SArnd Bergmann goto out; 829c99c1994SAkinobu Mita ret = spu_sched_init(); 83067207b96SArnd Bergmann if (ret) 83167207b96SArnd Bergmann goto out_cache; 832c99c1994SAkinobu Mita ret = register_filesystem(&spufs_type); 833c99c1994SAkinobu Mita if (ret) 834c99c1994SAkinobu Mita goto out_sched; 83567207b96SArnd Bergmann ret = register_spu_syscalls(&spufs_calls); 83667207b96SArnd Bergmann if (ret) 83767207b96SArnd Bergmann goto out_fs; 8380afacde3Sarnd@arndb.de 8390afacde3Sarnd@arndb.de spufs_init_isolated_loader(); 840bf1ab978SDwayne Grant McConnell 84167207b96SArnd Bergmann return 0; 842c99c1994SAkinobu Mita 84367207b96SArnd Bergmann out_fs: 84467207b96SArnd Bergmann unregister_filesystem(&spufs_type); 845c99c1994SAkinobu Mita out_sched: 846c99c1994SAkinobu Mita spu_sched_exit(); 84767207b96SArnd Bergmann out_cache: 84867207b96SArnd Bergmann kmem_cache_destroy(spufs_inode_cache); 84967207b96SArnd Bergmann out: 85067207b96SArnd Bergmann return ret; 85167207b96SArnd Bergmann } 85267207b96SArnd Bergmann module_init(spufs_init); 85367207b96SArnd Bergmann 854e78b47a5SArnd Bergmann static void __exit spufs_exit(void) 85567207b96SArnd Bergmann { 8568b3d6663SArnd Bergmann spu_sched_exit(); 857db1384b4SAkinobu Mita spufs_exit_isolated_loader(); 85867207b96SArnd Bergmann unregister_spu_syscalls(&spufs_calls); 85967207b96SArnd Bergmann unregister_filesystem(&spufs_type); 86067207b96SArnd Bergmann kmem_cache_destroy(spufs_inode_cache); 86167207b96SArnd Bergmann } 86267207b96SArnd Bergmann module_exit(spufs_exit); 86367207b96SArnd Bergmann 86467207b96SArnd Bergmann MODULE_LICENSE("GPL"); 86567207b96SArnd Bergmann MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 86667207b96SArnd Bergmann 867