167207b96SArnd Bergmann /* 267207b96SArnd Bergmann * SPU file system 367207b96SArnd Bergmann * 467207b96SArnd Bergmann * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 567207b96SArnd Bergmann * 667207b96SArnd Bergmann * Author: Arnd Bergmann <arndb@de.ibm.com> 767207b96SArnd Bergmann * 867207b96SArnd Bergmann * This program is free software; you can redistribute it and/or modify 967207b96SArnd Bergmann * it under the terms of the GNU General Public License as published by 1067207b96SArnd Bergmann * the Free Software Foundation; either version 2, or (at your option) 1167207b96SArnd Bergmann * any later version. 1267207b96SArnd Bergmann * 1367207b96SArnd Bergmann * This program is distributed in the hope that it will be useful, 1467207b96SArnd Bergmann * but WITHOUT ANY WARRANTY; without even the implied warranty of 1567207b96SArnd Bergmann * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1667207b96SArnd Bergmann * GNU General Public License for more details. 1767207b96SArnd Bergmann * 1867207b96SArnd Bergmann * You should have received a copy of the GNU General Public License 1967207b96SArnd Bergmann * along with this program; if not, write to the Free Software 2067207b96SArnd Bergmann * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 2167207b96SArnd Bergmann */ 2267207b96SArnd Bergmann 2367207b96SArnd Bergmann #include <linux/file.h> 2467207b96SArnd Bergmann #include <linux/fs.h> 2567207b96SArnd Bergmann #include <linux/backing-dev.h> 2667207b96SArnd Bergmann #include <linux/init.h> 2767207b96SArnd Bergmann #include <linux/ioctl.h> 2867207b96SArnd Bergmann #include <linux/module.h> 29346f4d3cSArnd Bergmann #include <linux/mount.h> 3067207b96SArnd Bergmann #include <linux/namei.h> 3167207b96SArnd Bergmann #include <linux/pagemap.h> 3267207b96SArnd Bergmann #include <linux/poll.h> 3367207b96SArnd Bergmann #include <linux/slab.h> 3467207b96SArnd Bergmann #include <linux/parser.h> 3567207b96SArnd Bergmann 360afacde3Sarnd@arndb.de #include <asm/prom.h> 3767207b96SArnd Bergmann #include <asm/semaphore.h> 3867207b96SArnd Bergmann #include <asm/spu.h> 39ccf17e9dSJeremy Kerr #include <asm/spu_priv1.h> 4067207b96SArnd Bergmann #include <asm/uaccess.h> 4167207b96SArnd Bergmann 4267207b96SArnd Bergmann #include "spufs.h" 4367207b96SArnd Bergmann 44e18b890bSChristoph Lameter static struct kmem_cache *spufs_inode_cache; 45c6730ed4SJeremy Kerr char *isolated_loader; 4667207b96SArnd Bergmann 4767207b96SArnd Bergmann static struct inode * 4867207b96SArnd Bergmann spufs_alloc_inode(struct super_block *sb) 4967207b96SArnd Bergmann { 5067207b96SArnd Bergmann struct spufs_inode_info *ei; 5167207b96SArnd Bergmann 52e94b1766SChristoph Lameter ei = kmem_cache_alloc(spufs_inode_cache, GFP_KERNEL); 5367207b96SArnd Bergmann if (!ei) 5467207b96SArnd Bergmann return NULL; 556263203eSArnd Bergmann 566263203eSArnd Bergmann ei->i_gang = NULL; 576263203eSArnd Bergmann ei->i_ctx = NULL; 5843c2bbd9SChristoph Hellwig ei->i_openers = 0; 596263203eSArnd Bergmann 6067207b96SArnd Bergmann return &ei->vfs_inode; 6167207b96SArnd Bergmann } 6267207b96SArnd Bergmann 6367207b96SArnd Bergmann static void 6467207b96SArnd Bergmann spufs_destroy_inode(struct inode *inode) 6567207b96SArnd Bergmann { 6667207b96SArnd Bergmann kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); 6767207b96SArnd Bergmann } 6867207b96SArnd Bergmann 6967207b96SArnd Bergmann static void 70e18b890bSChristoph Lameter spufs_init_once(void *p, struct kmem_cache * cachep, unsigned long flags) 7167207b96SArnd Bergmann { 7267207b96SArnd Bergmann struct spufs_inode_info *ei = p; 7367207b96SArnd Bergmann 7467207b96SArnd Bergmann inode_init_once(&ei->vfs_inode); 7567207b96SArnd Bergmann } 7667207b96SArnd Bergmann 7767207b96SArnd Bergmann static struct inode * 7867207b96SArnd Bergmann spufs_new_inode(struct super_block *sb, int mode) 7967207b96SArnd Bergmann { 8067207b96SArnd Bergmann struct inode *inode; 8167207b96SArnd Bergmann 8267207b96SArnd Bergmann inode = new_inode(sb); 8367207b96SArnd Bergmann if (!inode) 8467207b96SArnd Bergmann goto out; 8567207b96SArnd Bergmann 8667207b96SArnd Bergmann inode->i_mode = mode; 8767207b96SArnd Bergmann inode->i_uid = current->fsuid; 8867207b96SArnd Bergmann inode->i_gid = current->fsgid; 8967207b96SArnd Bergmann inode->i_blocks = 0; 9067207b96SArnd Bergmann inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 9167207b96SArnd Bergmann out: 9267207b96SArnd Bergmann return inode; 9367207b96SArnd Bergmann } 9467207b96SArnd Bergmann 9567207b96SArnd Bergmann static int 9667207b96SArnd Bergmann spufs_setattr(struct dentry *dentry, struct iattr *attr) 9767207b96SArnd Bergmann { 9867207b96SArnd Bergmann struct inode *inode = dentry->d_inode; 9967207b96SArnd Bergmann 10067207b96SArnd Bergmann if ((attr->ia_valid & ATTR_SIZE) && 10167207b96SArnd Bergmann (attr->ia_size != inode->i_size)) 10267207b96SArnd Bergmann return -EINVAL; 10367207b96SArnd Bergmann return inode_setattr(inode, attr); 10467207b96SArnd Bergmann } 10567207b96SArnd Bergmann 10667207b96SArnd Bergmann 10767207b96SArnd Bergmann static int 10867207b96SArnd Bergmann spufs_new_file(struct super_block *sb, struct dentry *dentry, 10999ac48f5SArjan van de Ven const struct file_operations *fops, int mode, 11067207b96SArnd Bergmann struct spu_context *ctx) 11167207b96SArnd Bergmann { 11267207b96SArnd Bergmann static struct inode_operations spufs_file_iops = { 11367207b96SArnd Bergmann .setattr = spufs_setattr, 11467207b96SArnd Bergmann }; 11567207b96SArnd Bergmann struct inode *inode; 11667207b96SArnd Bergmann int ret; 11767207b96SArnd Bergmann 11867207b96SArnd Bergmann ret = -ENOSPC; 11967207b96SArnd Bergmann inode = spufs_new_inode(sb, S_IFREG | mode); 12067207b96SArnd Bergmann if (!inode) 12167207b96SArnd Bergmann goto out; 12267207b96SArnd Bergmann 12367207b96SArnd Bergmann ret = 0; 12467207b96SArnd Bergmann inode->i_op = &spufs_file_iops; 12567207b96SArnd Bergmann inode->i_fop = fops; 1268e18e294STheodore Ts'o inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); 12767207b96SArnd Bergmann d_add(dentry, inode); 12867207b96SArnd Bergmann out: 12967207b96SArnd Bergmann return ret; 13067207b96SArnd Bergmann } 13167207b96SArnd Bergmann 13267207b96SArnd Bergmann static void 13367207b96SArnd Bergmann spufs_delete_inode(struct inode *inode) 13467207b96SArnd Bergmann { 1356263203eSArnd Bergmann struct spufs_inode_info *ei = SPUFS_I(inode); 1366263203eSArnd Bergmann 1376263203eSArnd Bergmann if (ei->i_ctx) 1386263203eSArnd Bergmann put_spu_context(ei->i_ctx); 1396263203eSArnd Bergmann if (ei->i_gang) 1406263203eSArnd Bergmann put_spu_gang(ei->i_gang); 14167207b96SArnd Bergmann clear_inode(inode); 14267207b96SArnd Bergmann } 14367207b96SArnd Bergmann 1443f51dd91SArnd Bergmann static void spufs_prune_dir(struct dentry *dir) 1453f51dd91SArnd Bergmann { 1463f51dd91SArnd Bergmann struct dentry *dentry, *tmp; 1476263203eSArnd Bergmann 1481b1dcc1bSJes Sorensen mutex_lock(&dir->d_inode->i_mutex); 149c3a9aea7SAndrew Morton list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { 1503f51dd91SArnd Bergmann spin_lock(&dcache_lock); 1513f51dd91SArnd Bergmann spin_lock(&dentry->d_lock); 1523f51dd91SArnd Bergmann if (!(d_unhashed(dentry)) && dentry->d_inode) { 1533f51dd91SArnd Bergmann dget_locked(dentry); 1543f51dd91SArnd Bergmann __d_drop(dentry); 1553f51dd91SArnd Bergmann spin_unlock(&dentry->d_lock); 1563f51dd91SArnd Bergmann simple_unlink(dir->d_inode, dentry); 1573f51dd91SArnd Bergmann spin_unlock(&dcache_lock); 1583f51dd91SArnd Bergmann dput(dentry); 1593f51dd91SArnd Bergmann } else { 1603f51dd91SArnd Bergmann spin_unlock(&dentry->d_lock); 1613f51dd91SArnd Bergmann spin_unlock(&dcache_lock); 1623f51dd91SArnd Bergmann } 1633f51dd91SArnd Bergmann } 1643f51dd91SArnd Bergmann shrink_dcache_parent(dir); 1651b1dcc1bSJes Sorensen mutex_unlock(&dir->d_inode->i_mutex); 1663f51dd91SArnd Bergmann } 1673f51dd91SArnd Bergmann 1686263203eSArnd Bergmann /* Caller must hold parent->i_mutex */ 1696263203eSArnd Bergmann static int spufs_rmdir(struct inode *parent, struct dentry *dir) 1703f51dd91SArnd Bergmann { 1713f51dd91SArnd Bergmann /* remove all entries */ 1726263203eSArnd Bergmann spufs_prune_dir(dir); 1733f51dd91SArnd Bergmann 1746263203eSArnd Bergmann return simple_rmdir(parent, dir); 1753f51dd91SArnd Bergmann } 1763f51dd91SArnd Bergmann 1773f51dd91SArnd Bergmann static int spufs_fill_dir(struct dentry *dir, struct tree_descr *files, 17867207b96SArnd Bergmann int mode, struct spu_context *ctx) 17967207b96SArnd Bergmann { 18087873c86SSebastian Siewior struct dentry *dentry, *tmp; 18167207b96SArnd Bergmann int ret; 18267207b96SArnd Bergmann 18367207b96SArnd Bergmann while (files->name && files->name[0]) { 18467207b96SArnd Bergmann ret = -ENOMEM; 18567207b96SArnd Bergmann dentry = d_alloc_name(dir, files->name); 18667207b96SArnd Bergmann if (!dentry) 18767207b96SArnd Bergmann goto out; 18867207b96SArnd Bergmann ret = spufs_new_file(dir->d_sb, dentry, files->ops, 18967207b96SArnd Bergmann files->mode & mode, ctx); 19067207b96SArnd Bergmann if (ret) 19167207b96SArnd Bergmann goto out; 19267207b96SArnd Bergmann files++; 19367207b96SArnd Bergmann } 19467207b96SArnd Bergmann return 0; 19567207b96SArnd Bergmann out: 19687873c86SSebastian Siewior /* 19787873c86SSebastian Siewior * remove all children from dir. dir->inode is not set so don't 19887873c86SSebastian Siewior * just simply use spufs_prune_dir() and panic afterwards :) 19987873c86SSebastian Siewior * dput() looks like it will do the right thing: 20087873c86SSebastian Siewior * - dec parent's ref counter 20187873c86SSebastian Siewior * - remove child from parent's child list 20287873c86SSebastian Siewior * - free child's inode if possible 20387873c86SSebastian Siewior * - free child 20487873c86SSebastian Siewior */ 20587873c86SSebastian Siewior list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { 20687873c86SSebastian Siewior dput(dentry); 20787873c86SSebastian Siewior } 20887873c86SSebastian Siewior 20987873c86SSebastian Siewior shrink_dcache_parent(dir); 21067207b96SArnd Bergmann return ret; 21167207b96SArnd Bergmann } 21267207b96SArnd Bergmann 21367207b96SArnd Bergmann static int spufs_dir_close(struct inode *inode, struct file *file) 21467207b96SArnd Bergmann { 2150309f02dSMichael Ellerman struct spu_context *ctx; 2166263203eSArnd Bergmann struct inode *parent; 2176263203eSArnd Bergmann struct dentry *dir; 21867207b96SArnd Bergmann int ret; 21967207b96SArnd Bergmann 220b4d1ab58SJosef Sipek dir = file->f_path.dentry; 2216263203eSArnd Bergmann parent = dir->d_parent->d_inode; 2226263203eSArnd Bergmann ctx = SPUFS_I(dir->d_inode)->i_ctx; 223c8ca0633SArnd Bergmann 2246263203eSArnd Bergmann mutex_lock(&parent->i_mutex); 2256263203eSArnd Bergmann ret = spufs_rmdir(parent, dir); 2266263203eSArnd Bergmann mutex_unlock(&parent->i_mutex); 22767207b96SArnd Bergmann WARN_ON(ret); 228c8ca0633SArnd Bergmann 2290309f02dSMichael Ellerman /* We have to give up the mm_struct */ 2300309f02dSMichael Ellerman spu_forget(ctx); 2310309f02dSMichael Ellerman 23267207b96SArnd Bergmann return dcache_dir_close(inode, file); 23367207b96SArnd Bergmann } 23467207b96SArnd Bergmann 2355dfe4c96SArjan van de Ven const struct file_operations spufs_context_fops = { 23667207b96SArnd Bergmann .open = dcache_dir_open, 23767207b96SArnd Bergmann .release = spufs_dir_close, 23867207b96SArnd Bergmann .llseek = dcache_dir_lseek, 23967207b96SArnd Bergmann .read = generic_read_dir, 24067207b96SArnd Bergmann .readdir = dcache_readdir, 24167207b96SArnd Bergmann .fsync = simple_sync_file, 24267207b96SArnd Bergmann }; 243bf1ab978SDwayne Grant McConnell EXPORT_SYMBOL_GPL(spufs_context_fops); 24467207b96SArnd Bergmann 24567207b96SArnd Bergmann static int 2469add11daSArnd Bergmann spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 2479add11daSArnd Bergmann int mode) 24867207b96SArnd Bergmann { 24967207b96SArnd Bergmann int ret; 25067207b96SArnd Bergmann struct inode *inode; 25167207b96SArnd Bergmann struct spu_context *ctx; 25267207b96SArnd Bergmann 25367207b96SArnd Bergmann ret = -ENOSPC; 25467207b96SArnd Bergmann inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 25567207b96SArnd Bergmann if (!inode) 25667207b96SArnd Bergmann goto out; 25767207b96SArnd Bergmann 25867207b96SArnd Bergmann if (dir->i_mode & S_ISGID) { 25967207b96SArnd Bergmann inode->i_gid = dir->i_gid; 26067207b96SArnd Bergmann inode->i_mode &= S_ISGID; 26167207b96SArnd Bergmann } 2626263203eSArnd Bergmann ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 26367207b96SArnd Bergmann SPUFS_I(inode)->i_ctx = ctx; 26467207b96SArnd Bergmann if (!ctx) 26567207b96SArnd Bergmann goto out_iput; 26667207b96SArnd Bergmann 2679add11daSArnd Bergmann ctx->flags = flags; 268*b8c295f9SJeremy Kerr inode->i_op = &simple_dir_inode_operations; 26967207b96SArnd Bergmann inode->i_fop = &simple_dir_operations; 2705737edd1SMark Nutter if (flags & SPU_CREATE_NOSCHED) 2715737edd1SMark Nutter ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 2725737edd1SMark Nutter mode, ctx); 2735737edd1SMark Nutter else 27467207b96SArnd Bergmann ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 2755737edd1SMark Nutter 27667207b96SArnd Bergmann if (ret) 27767207b96SArnd Bergmann goto out_free_ctx; 27867207b96SArnd Bergmann 27967207b96SArnd Bergmann d_instantiate(dentry, inode); 28067207b96SArnd Bergmann dget(dentry); 28167207b96SArnd Bergmann dir->i_nlink++; 282346f4d3cSArnd Bergmann dentry->d_inode->i_nlink++; 28367207b96SArnd Bergmann goto out; 28467207b96SArnd Bergmann 28567207b96SArnd Bergmann out_free_ctx: 28689df0085SSebastian Siewior spu_forget(ctx); 28767207b96SArnd Bergmann put_spu_context(ctx); 28867207b96SArnd Bergmann out_iput: 28967207b96SArnd Bergmann iput(inode); 29067207b96SArnd Bergmann out: 29167207b96SArnd Bergmann return ret; 29267207b96SArnd Bergmann } 29367207b96SArnd Bergmann 294346f4d3cSArnd Bergmann static int spufs_context_open(struct dentry *dentry, struct vfsmount *mnt) 295346f4d3cSArnd Bergmann { 296346f4d3cSArnd Bergmann int ret; 297346f4d3cSArnd Bergmann struct file *filp; 298346f4d3cSArnd Bergmann 299346f4d3cSArnd Bergmann ret = get_unused_fd(); 300346f4d3cSArnd Bergmann if (ret < 0) { 301346f4d3cSArnd Bergmann dput(dentry); 302346f4d3cSArnd Bergmann mntput(mnt); 303346f4d3cSArnd Bergmann goto out; 304346f4d3cSArnd Bergmann } 305346f4d3cSArnd Bergmann 306346f4d3cSArnd Bergmann filp = dentry_open(dentry, mnt, O_RDONLY); 307346f4d3cSArnd Bergmann if (IS_ERR(filp)) { 308346f4d3cSArnd Bergmann put_unused_fd(ret); 309346f4d3cSArnd Bergmann ret = PTR_ERR(filp); 310346f4d3cSArnd Bergmann goto out; 311346f4d3cSArnd Bergmann } 312346f4d3cSArnd Bergmann 313346f4d3cSArnd Bergmann filp->f_op = &spufs_context_fops; 314346f4d3cSArnd Bergmann fd_install(ret, filp); 315346f4d3cSArnd Bergmann out: 316346f4d3cSArnd Bergmann return ret; 317346f4d3cSArnd Bergmann } 318346f4d3cSArnd Bergmann 3196263203eSArnd Bergmann static int spufs_create_context(struct inode *inode, 3206263203eSArnd Bergmann struct dentry *dentry, 3216263203eSArnd Bergmann struct vfsmount *mnt, int flags, int mode) 3226263203eSArnd Bergmann { 3236263203eSArnd Bergmann int ret; 3246263203eSArnd Bergmann 3255737edd1SMark Nutter ret = -EPERM; 3265737edd1SMark Nutter if ((flags & SPU_CREATE_NOSCHED) && 3275737edd1SMark Nutter !capable(CAP_SYS_NICE)) 3285737edd1SMark Nutter goto out_unlock; 3295737edd1SMark Nutter 3305737edd1SMark Nutter ret = -EINVAL; 3315737edd1SMark Nutter if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 3325737edd1SMark Nutter == SPU_CREATE_ISOLATE) 3335737edd1SMark Nutter goto out_unlock; 3345737edd1SMark Nutter 335bd2e5f82SJeremy Kerr ret = -ENODEV; 336bd2e5f82SJeremy Kerr if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 337bd2e5f82SJeremy Kerr goto out_unlock; 338bd2e5f82SJeremy Kerr 3396263203eSArnd Bergmann ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO); 3406263203eSArnd Bergmann if (ret) 3416263203eSArnd Bergmann goto out_unlock; 3426263203eSArnd Bergmann 3436263203eSArnd Bergmann /* 3446263203eSArnd Bergmann * get references for dget and mntget, will be released 3456263203eSArnd Bergmann * in error path of *_open(). 3466263203eSArnd Bergmann */ 3476263203eSArnd Bergmann ret = spufs_context_open(dget(dentry), mntget(mnt)); 3486263203eSArnd Bergmann if (ret < 0) { 3496263203eSArnd Bergmann WARN_ON(spufs_rmdir(inode, dentry)); 3506263203eSArnd Bergmann mutex_unlock(&inode->i_mutex); 3516263203eSArnd Bergmann spu_forget(SPUFS_I(dentry->d_inode)->i_ctx); 3526263203eSArnd Bergmann goto out; 3536263203eSArnd Bergmann } 3546263203eSArnd Bergmann 3556263203eSArnd Bergmann out_unlock: 3566263203eSArnd Bergmann mutex_unlock(&inode->i_mutex); 3576263203eSArnd Bergmann out: 3586263203eSArnd Bergmann dput(dentry); 3596263203eSArnd Bergmann return ret; 3606263203eSArnd Bergmann } 3616263203eSArnd Bergmann 3626263203eSArnd Bergmann static int 3636263203eSArnd Bergmann spufs_mkgang(struct inode *dir, struct dentry *dentry, int mode) 3646263203eSArnd Bergmann { 3656263203eSArnd Bergmann int ret; 3666263203eSArnd Bergmann struct inode *inode; 3676263203eSArnd Bergmann struct spu_gang *gang; 3686263203eSArnd Bergmann 3696263203eSArnd Bergmann ret = -ENOSPC; 3706263203eSArnd Bergmann inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 3716263203eSArnd Bergmann if (!inode) 3726263203eSArnd Bergmann goto out; 3736263203eSArnd Bergmann 3746263203eSArnd Bergmann ret = 0; 3756263203eSArnd Bergmann if (dir->i_mode & S_ISGID) { 3766263203eSArnd Bergmann inode->i_gid = dir->i_gid; 3776263203eSArnd Bergmann inode->i_mode &= S_ISGID; 3786263203eSArnd Bergmann } 3796263203eSArnd Bergmann gang = alloc_spu_gang(); 3806263203eSArnd Bergmann SPUFS_I(inode)->i_ctx = NULL; 3816263203eSArnd Bergmann SPUFS_I(inode)->i_gang = gang; 3826263203eSArnd Bergmann if (!gang) 3836263203eSArnd Bergmann goto out_iput; 3846263203eSArnd Bergmann 385*b8c295f9SJeremy Kerr inode->i_op = &simple_dir_inode_operations; 3866263203eSArnd Bergmann inode->i_fop = &simple_dir_operations; 3876263203eSArnd Bergmann 3886263203eSArnd Bergmann d_instantiate(dentry, inode); 3896263203eSArnd Bergmann dir->i_nlink++; 3906263203eSArnd Bergmann dentry->d_inode->i_nlink++; 3916263203eSArnd Bergmann return ret; 3926263203eSArnd Bergmann 3936263203eSArnd Bergmann out_iput: 3946263203eSArnd Bergmann iput(inode); 3956263203eSArnd Bergmann out: 3966263203eSArnd Bergmann return ret; 3976263203eSArnd Bergmann } 3986263203eSArnd Bergmann 3996263203eSArnd Bergmann static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt) 4006263203eSArnd Bergmann { 4016263203eSArnd Bergmann int ret; 4026263203eSArnd Bergmann struct file *filp; 4036263203eSArnd Bergmann 4046263203eSArnd Bergmann ret = get_unused_fd(); 4056263203eSArnd Bergmann if (ret < 0) { 4066263203eSArnd Bergmann dput(dentry); 4076263203eSArnd Bergmann mntput(mnt); 4086263203eSArnd Bergmann goto out; 4096263203eSArnd Bergmann } 4106263203eSArnd Bergmann 4116263203eSArnd Bergmann filp = dentry_open(dentry, mnt, O_RDONLY); 4126263203eSArnd Bergmann if (IS_ERR(filp)) { 4136263203eSArnd Bergmann put_unused_fd(ret); 4146263203eSArnd Bergmann ret = PTR_ERR(filp); 4156263203eSArnd Bergmann goto out; 4166263203eSArnd Bergmann } 4176263203eSArnd Bergmann 418877907d3SJeremy Kerr filp->f_op = &simple_dir_operations; 4196263203eSArnd Bergmann fd_install(ret, filp); 4206263203eSArnd Bergmann out: 4216263203eSArnd Bergmann return ret; 4226263203eSArnd Bergmann } 4236263203eSArnd Bergmann 4246263203eSArnd Bergmann static int spufs_create_gang(struct inode *inode, 4256263203eSArnd Bergmann struct dentry *dentry, 4266263203eSArnd Bergmann struct vfsmount *mnt, int mode) 4276263203eSArnd Bergmann { 4286263203eSArnd Bergmann int ret; 4296263203eSArnd Bergmann 4306263203eSArnd Bergmann ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO); 4316263203eSArnd Bergmann if (ret) 4326263203eSArnd Bergmann goto out; 4336263203eSArnd Bergmann 4346263203eSArnd Bergmann /* 4356263203eSArnd Bergmann * get references for dget and mntget, will be released 4366263203eSArnd Bergmann * in error path of *_open(). 4376263203eSArnd Bergmann */ 4386263203eSArnd Bergmann ret = spufs_gang_open(dget(dentry), mntget(mnt)); 439877907d3SJeremy Kerr if (ret < 0) { 440877907d3SJeremy Kerr int err = simple_rmdir(inode, dentry); 441877907d3SJeremy Kerr WARN_ON(err); 442877907d3SJeremy Kerr } 4436263203eSArnd Bergmann 4446263203eSArnd Bergmann out: 4456263203eSArnd Bergmann mutex_unlock(&inode->i_mutex); 4466263203eSArnd Bergmann dput(dentry); 4476263203eSArnd Bergmann return ret; 4486263203eSArnd Bergmann } 4496263203eSArnd Bergmann 4506263203eSArnd Bergmann 451346f4d3cSArnd Bergmann static struct file_system_type spufs_type; 452346f4d3cSArnd Bergmann 4536263203eSArnd Bergmann long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode) 45467207b96SArnd Bergmann { 45567207b96SArnd Bergmann struct dentry *dentry; 45667207b96SArnd Bergmann int ret; 45767207b96SArnd Bergmann 45867207b96SArnd Bergmann ret = -EINVAL; 4596263203eSArnd Bergmann /* check if we are on spufs */ 4606263203eSArnd Bergmann if (nd->dentry->d_sb->s_type != &spufs_type) 46167207b96SArnd Bergmann goto out; 46267207b96SArnd Bergmann 4636263203eSArnd Bergmann /* don't accept undefined flags */ 4649add11daSArnd Bergmann if (flags & (~SPU_CREATE_FLAG_ALL)) 465c9832948Sarnd@arndb.de goto out; 466c9832948Sarnd@arndb.de 4676263203eSArnd Bergmann /* only threads can be underneath a gang */ 4686263203eSArnd Bergmann if (nd->dentry != nd->dentry->d_sb->s_root) { 4696263203eSArnd Bergmann if ((flags & SPU_CREATE_GANG) || 4706263203eSArnd Bergmann !SPUFS_I(nd->dentry->d_inode)->i_gang) 4716263203eSArnd Bergmann goto out; 4726263203eSArnd Bergmann } 4736263203eSArnd Bergmann 47467207b96SArnd Bergmann dentry = lookup_create(nd, 1); 47567207b96SArnd Bergmann ret = PTR_ERR(dentry); 47667207b96SArnd Bergmann if (IS_ERR(dentry)) 47767207b96SArnd Bergmann goto out_dir; 47867207b96SArnd Bergmann 47967207b96SArnd Bergmann ret = -EEXIST; 48067207b96SArnd Bergmann if (dentry->d_inode) 48167207b96SArnd Bergmann goto out_dput; 48267207b96SArnd Bergmann 48367207b96SArnd Bergmann mode &= ~current->fs->umask; 48467207b96SArnd Bergmann 4856263203eSArnd Bergmann if (flags & SPU_CREATE_GANG) 4866263203eSArnd Bergmann return spufs_create_gang(nd->dentry->d_inode, 4876263203eSArnd Bergmann dentry, nd->mnt, mode); 4886263203eSArnd Bergmann else 4896263203eSArnd Bergmann return spufs_create_context(nd->dentry->d_inode, 4906263203eSArnd Bergmann dentry, nd->mnt, flags, mode); 49167207b96SArnd Bergmann 49267207b96SArnd Bergmann out_dput: 49367207b96SArnd Bergmann dput(dentry); 49467207b96SArnd Bergmann out_dir: 4951b1dcc1bSJes Sorensen mutex_unlock(&nd->dentry->d_inode->i_mutex); 49667207b96SArnd Bergmann out: 49767207b96SArnd Bergmann return ret; 49867207b96SArnd Bergmann } 49967207b96SArnd Bergmann 50067207b96SArnd Bergmann /* File system initialization */ 50167207b96SArnd Bergmann enum { 502f11f5ee7SJeremy Kerr Opt_uid, Opt_gid, Opt_mode, Opt_err, 50367207b96SArnd Bergmann }; 50467207b96SArnd Bergmann 50567207b96SArnd Bergmann static match_table_t spufs_tokens = { 50667207b96SArnd Bergmann { Opt_uid, "uid=%d" }, 50767207b96SArnd Bergmann { Opt_gid, "gid=%d" }, 508f11f5ee7SJeremy Kerr { Opt_mode, "mode=%o" }, 50967207b96SArnd Bergmann { Opt_err, NULL }, 51067207b96SArnd Bergmann }; 51167207b96SArnd Bergmann 51267207b96SArnd Bergmann static int 51367207b96SArnd Bergmann spufs_parse_options(char *options, struct inode *root) 51467207b96SArnd Bergmann { 51567207b96SArnd Bergmann char *p; 51667207b96SArnd Bergmann substring_t args[MAX_OPT_ARGS]; 51767207b96SArnd Bergmann 51867207b96SArnd Bergmann while ((p = strsep(&options, ",")) != NULL) { 51967207b96SArnd Bergmann int token, option; 52067207b96SArnd Bergmann 52167207b96SArnd Bergmann if (!*p) 52267207b96SArnd Bergmann continue; 52367207b96SArnd Bergmann 52467207b96SArnd Bergmann token = match_token(p, spufs_tokens, args); 52567207b96SArnd Bergmann switch (token) { 52667207b96SArnd Bergmann case Opt_uid: 52767207b96SArnd Bergmann if (match_int(&args[0], &option)) 52867207b96SArnd Bergmann return 0; 52967207b96SArnd Bergmann root->i_uid = option; 53067207b96SArnd Bergmann break; 53167207b96SArnd Bergmann case Opt_gid: 53267207b96SArnd Bergmann if (match_int(&args[0], &option)) 53367207b96SArnd Bergmann return 0; 53467207b96SArnd Bergmann root->i_gid = option; 53567207b96SArnd Bergmann break; 536f11f5ee7SJeremy Kerr case Opt_mode: 537f11f5ee7SJeremy Kerr if (match_octal(&args[0], &option)) 538f11f5ee7SJeremy Kerr return 0; 539f11f5ee7SJeremy Kerr root->i_mode = option | S_IFDIR; 540f11f5ee7SJeremy Kerr break; 54167207b96SArnd Bergmann default: 54267207b96SArnd Bergmann return 0; 54367207b96SArnd Bergmann } 54467207b96SArnd Bergmann } 54567207b96SArnd Bergmann return 1; 54667207b96SArnd Bergmann } 54767207b96SArnd Bergmann 548db1384b4SAkinobu Mita static void spufs_exit_isolated_loader(void) 549db1384b4SAkinobu Mita { 550db1384b4SAkinobu Mita kfree(isolated_loader); 551db1384b4SAkinobu Mita } 552db1384b4SAkinobu Mita 5530afacde3Sarnd@arndb.de static void 5540afacde3Sarnd@arndb.de spufs_init_isolated_loader(void) 5550afacde3Sarnd@arndb.de { 5560afacde3Sarnd@arndb.de struct device_node *dn; 5570afacde3Sarnd@arndb.de const char *loader; 5580afacde3Sarnd@arndb.de int size; 5590afacde3Sarnd@arndb.de 5600afacde3Sarnd@arndb.de dn = of_find_node_by_path("/spu-isolation"); 5610afacde3Sarnd@arndb.de if (!dn) 5620afacde3Sarnd@arndb.de return; 5630afacde3Sarnd@arndb.de 564e2eb6392SStephen Rothwell loader = of_get_property(dn, "loader", &size); 5650afacde3Sarnd@arndb.de if (!loader) 5660afacde3Sarnd@arndb.de return; 5670afacde3Sarnd@arndb.de 5680afacde3Sarnd@arndb.de /* kmalloc should align on a 16 byte boundary..* */ 5690afacde3Sarnd@arndb.de isolated_loader = kmalloc(size, GFP_KERNEL); 5700afacde3Sarnd@arndb.de if (!isolated_loader) 5710afacde3Sarnd@arndb.de return; 5720afacde3Sarnd@arndb.de 5730afacde3Sarnd@arndb.de memcpy(isolated_loader, loader, size); 5740afacde3Sarnd@arndb.de printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 5750afacde3Sarnd@arndb.de } 5760afacde3Sarnd@arndb.de 57767207b96SArnd Bergmann static int 5788b3d6663SArnd Bergmann spufs_create_root(struct super_block *sb, void *data) 5798b3d6663SArnd Bergmann { 58067207b96SArnd Bergmann struct inode *inode; 58167207b96SArnd Bergmann int ret; 58267207b96SArnd Bergmann 5838f18a158SArnd Bergmann ret = -ENODEV; 5848f18a158SArnd Bergmann if (!spu_management_ops) 5858f18a158SArnd Bergmann goto out; 5868f18a158SArnd Bergmann 58767207b96SArnd Bergmann ret = -ENOMEM; 58867207b96SArnd Bergmann inode = spufs_new_inode(sb, S_IFDIR | 0775); 58967207b96SArnd Bergmann if (!inode) 59067207b96SArnd Bergmann goto out; 59167207b96SArnd Bergmann 592*b8c295f9SJeremy Kerr inode->i_op = &simple_dir_inode_operations; 59367207b96SArnd Bergmann inode->i_fop = &simple_dir_operations; 59467207b96SArnd Bergmann SPUFS_I(inode)->i_ctx = NULL; 59567207b96SArnd Bergmann 59667207b96SArnd Bergmann ret = -EINVAL; 59767207b96SArnd Bergmann if (!spufs_parse_options(data, inode)) 59867207b96SArnd Bergmann goto out_iput; 59967207b96SArnd Bergmann 60067207b96SArnd Bergmann ret = -ENOMEM; 60167207b96SArnd Bergmann sb->s_root = d_alloc_root(inode); 60267207b96SArnd Bergmann if (!sb->s_root) 60367207b96SArnd Bergmann goto out_iput; 60467207b96SArnd Bergmann 60567207b96SArnd Bergmann return 0; 60667207b96SArnd Bergmann out_iput: 60767207b96SArnd Bergmann iput(inode); 60867207b96SArnd Bergmann out: 60967207b96SArnd Bergmann return ret; 61067207b96SArnd Bergmann } 61167207b96SArnd Bergmann 61267207b96SArnd Bergmann static int 61367207b96SArnd Bergmann spufs_fill_super(struct super_block *sb, void *data, int silent) 61467207b96SArnd Bergmann { 61567207b96SArnd Bergmann static struct super_operations s_ops = { 61667207b96SArnd Bergmann .alloc_inode = spufs_alloc_inode, 61767207b96SArnd Bergmann .destroy_inode = spufs_destroy_inode, 61867207b96SArnd Bergmann .statfs = simple_statfs, 61967207b96SArnd Bergmann .delete_inode = spufs_delete_inode, 62067207b96SArnd Bergmann .drop_inode = generic_delete_inode, 62167207b96SArnd Bergmann }; 62267207b96SArnd Bergmann 62367207b96SArnd Bergmann sb->s_maxbytes = MAX_LFS_FILESIZE; 62467207b96SArnd Bergmann sb->s_blocksize = PAGE_CACHE_SIZE; 62567207b96SArnd Bergmann sb->s_blocksize_bits = PAGE_CACHE_SHIFT; 62667207b96SArnd Bergmann sb->s_magic = SPUFS_MAGIC; 62767207b96SArnd Bergmann sb->s_op = &s_ops; 62867207b96SArnd Bergmann 62967207b96SArnd Bergmann return spufs_create_root(sb, data); 63067207b96SArnd Bergmann } 63167207b96SArnd Bergmann 632454e2398SDavid Howells static int 63367207b96SArnd Bergmann spufs_get_sb(struct file_system_type *fstype, int flags, 634454e2398SDavid Howells const char *name, void *data, struct vfsmount *mnt) 63567207b96SArnd Bergmann { 636454e2398SDavid Howells return get_sb_single(fstype, flags, data, spufs_fill_super, mnt); 63767207b96SArnd Bergmann } 63867207b96SArnd Bergmann 63967207b96SArnd Bergmann static struct file_system_type spufs_type = { 64067207b96SArnd Bergmann .owner = THIS_MODULE, 64167207b96SArnd Bergmann .name = "spufs", 64267207b96SArnd Bergmann .get_sb = spufs_get_sb, 64367207b96SArnd Bergmann .kill_sb = kill_litter_super, 64467207b96SArnd Bergmann }; 64567207b96SArnd Bergmann 646e78b47a5SArnd Bergmann static int __init spufs_init(void) 64767207b96SArnd Bergmann { 64867207b96SArnd Bergmann int ret; 649bf1ab978SDwayne Grant McConnell 650ccf17e9dSJeremy Kerr ret = -ENODEV; 651ccf17e9dSJeremy Kerr if (!spu_management_ops) 652ccf17e9dSJeremy Kerr goto out; 653ccf17e9dSJeremy Kerr 65467207b96SArnd Bergmann ret = -ENOMEM; 65567207b96SArnd Bergmann spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 65667207b96SArnd Bergmann sizeof(struct spufs_inode_info), 0, 65767207b96SArnd Bergmann SLAB_HWCACHE_ALIGN, spufs_init_once, NULL); 65867207b96SArnd Bergmann 65967207b96SArnd Bergmann if (!spufs_inode_cache) 66067207b96SArnd Bergmann goto out; 661c99c1994SAkinobu Mita ret = spu_sched_init(); 66267207b96SArnd Bergmann if (ret) 66367207b96SArnd Bergmann goto out_cache; 664c99c1994SAkinobu Mita ret = register_filesystem(&spufs_type); 665c99c1994SAkinobu Mita if (ret) 666c99c1994SAkinobu Mita goto out_sched; 66767207b96SArnd Bergmann ret = register_spu_syscalls(&spufs_calls); 66867207b96SArnd Bergmann if (ret) 66967207b96SArnd Bergmann goto out_fs; 670bf1ab978SDwayne Grant McConnell ret = register_arch_coredump_calls(&spufs_coredump_calls); 671bf1ab978SDwayne Grant McConnell if (ret) 672c99c1994SAkinobu Mita goto out_syscalls; 6730afacde3Sarnd@arndb.de 6740afacde3Sarnd@arndb.de spufs_init_isolated_loader(); 675bf1ab978SDwayne Grant McConnell 67667207b96SArnd Bergmann return 0; 677c99c1994SAkinobu Mita 678c99c1994SAkinobu Mita out_syscalls: 679c99c1994SAkinobu Mita unregister_spu_syscalls(&spufs_calls); 68067207b96SArnd Bergmann out_fs: 68167207b96SArnd Bergmann unregister_filesystem(&spufs_type); 682c99c1994SAkinobu Mita out_sched: 683c99c1994SAkinobu Mita spu_sched_exit(); 68467207b96SArnd Bergmann out_cache: 68567207b96SArnd Bergmann kmem_cache_destroy(spufs_inode_cache); 68667207b96SArnd Bergmann out: 68767207b96SArnd Bergmann return ret; 68867207b96SArnd Bergmann } 68967207b96SArnd Bergmann module_init(spufs_init); 69067207b96SArnd Bergmann 691e78b47a5SArnd Bergmann static void __exit spufs_exit(void) 69267207b96SArnd Bergmann { 6938b3d6663SArnd Bergmann spu_sched_exit(); 694db1384b4SAkinobu Mita spufs_exit_isolated_loader(); 695bf1ab978SDwayne Grant McConnell unregister_arch_coredump_calls(&spufs_coredump_calls); 69667207b96SArnd Bergmann unregister_spu_syscalls(&spufs_calls); 69767207b96SArnd Bergmann unregister_filesystem(&spufs_type); 69867207b96SArnd Bergmann kmem_cache_destroy(spufs_inode_cache); 69967207b96SArnd Bergmann } 70067207b96SArnd Bergmann module_exit(spufs_exit); 70167207b96SArnd Bergmann 70267207b96SArnd Bergmann MODULE_LICENSE("GPL"); 70367207b96SArnd Bergmann MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 70467207b96SArnd Bergmann 705