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 3667207b96SArnd Bergmann #include <asm/io.h> 3767207b96SArnd Bergmann #include <asm/semaphore.h> 3867207b96SArnd Bergmann #include <asm/spu.h> 3967207b96SArnd Bergmann #include <asm/uaccess.h> 4067207b96SArnd Bergmann 4167207b96SArnd Bergmann #include "spufs.h" 4267207b96SArnd Bergmann 4367207b96SArnd Bergmann static kmem_cache_t *spufs_inode_cache; 4467207b96SArnd Bergmann 4567207b96SArnd Bergmann static struct inode * 4667207b96SArnd Bergmann spufs_alloc_inode(struct super_block *sb) 4767207b96SArnd Bergmann { 4867207b96SArnd Bergmann struct spufs_inode_info *ei; 4967207b96SArnd Bergmann 5067207b96SArnd Bergmann ei = kmem_cache_alloc(spufs_inode_cache, SLAB_KERNEL); 5167207b96SArnd Bergmann if (!ei) 5267207b96SArnd Bergmann return NULL; 5367207b96SArnd Bergmann return &ei->vfs_inode; 5467207b96SArnd Bergmann } 5567207b96SArnd Bergmann 5667207b96SArnd Bergmann static void 5767207b96SArnd Bergmann spufs_destroy_inode(struct inode *inode) 5867207b96SArnd Bergmann { 5967207b96SArnd Bergmann kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); 6067207b96SArnd Bergmann } 6167207b96SArnd Bergmann 6267207b96SArnd Bergmann static void 6367207b96SArnd Bergmann spufs_init_once(void *p, kmem_cache_t * cachep, unsigned long flags) 6467207b96SArnd Bergmann { 6567207b96SArnd Bergmann struct spufs_inode_info *ei = p; 6667207b96SArnd Bergmann 6767207b96SArnd Bergmann if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 6867207b96SArnd Bergmann SLAB_CTOR_CONSTRUCTOR) { 6967207b96SArnd Bergmann inode_init_once(&ei->vfs_inode); 7067207b96SArnd Bergmann } 7167207b96SArnd Bergmann } 7267207b96SArnd Bergmann 7367207b96SArnd Bergmann static struct inode * 7467207b96SArnd Bergmann spufs_new_inode(struct super_block *sb, int mode) 7567207b96SArnd Bergmann { 7667207b96SArnd Bergmann struct inode *inode; 7767207b96SArnd Bergmann 7867207b96SArnd Bergmann inode = new_inode(sb); 7967207b96SArnd Bergmann if (!inode) 8067207b96SArnd Bergmann goto out; 8167207b96SArnd Bergmann 8267207b96SArnd Bergmann inode->i_mode = mode; 8367207b96SArnd Bergmann inode->i_uid = current->fsuid; 8467207b96SArnd Bergmann inode->i_gid = current->fsgid; 8567207b96SArnd Bergmann inode->i_blksize = PAGE_CACHE_SIZE; 8667207b96SArnd Bergmann inode->i_blocks = 0; 8767207b96SArnd Bergmann inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 8867207b96SArnd Bergmann out: 8967207b96SArnd Bergmann return inode; 9067207b96SArnd Bergmann } 9167207b96SArnd Bergmann 9267207b96SArnd Bergmann static int 9367207b96SArnd Bergmann spufs_setattr(struct dentry *dentry, struct iattr *attr) 9467207b96SArnd Bergmann { 9567207b96SArnd Bergmann struct inode *inode = dentry->d_inode; 9667207b96SArnd Bergmann 9767207b96SArnd Bergmann if ((attr->ia_valid & ATTR_SIZE) && 9867207b96SArnd Bergmann (attr->ia_size != inode->i_size)) 9967207b96SArnd Bergmann return -EINVAL; 10067207b96SArnd Bergmann return inode_setattr(inode, attr); 10167207b96SArnd Bergmann } 10267207b96SArnd Bergmann 10367207b96SArnd Bergmann 10467207b96SArnd Bergmann static int 10567207b96SArnd Bergmann spufs_new_file(struct super_block *sb, struct dentry *dentry, 10699ac48f5SArjan van de Ven const struct file_operations *fops, int mode, 10767207b96SArnd Bergmann struct spu_context *ctx) 10867207b96SArnd Bergmann { 10967207b96SArnd Bergmann static struct inode_operations spufs_file_iops = { 11067207b96SArnd Bergmann .setattr = spufs_setattr, 11167207b96SArnd Bergmann }; 11267207b96SArnd Bergmann struct inode *inode; 11367207b96SArnd Bergmann int ret; 11467207b96SArnd Bergmann 11567207b96SArnd Bergmann ret = -ENOSPC; 11667207b96SArnd Bergmann inode = spufs_new_inode(sb, S_IFREG | mode); 11767207b96SArnd Bergmann if (!inode) 11867207b96SArnd Bergmann goto out; 11967207b96SArnd Bergmann 12067207b96SArnd Bergmann ret = 0; 12167207b96SArnd Bergmann inode->i_op = &spufs_file_iops; 12267207b96SArnd Bergmann inode->i_fop = fops; 12367207b96SArnd Bergmann inode->u.generic_ip = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); 12467207b96SArnd Bergmann d_add(dentry, inode); 12567207b96SArnd Bergmann out: 12667207b96SArnd Bergmann return ret; 12767207b96SArnd Bergmann } 12867207b96SArnd Bergmann 12967207b96SArnd Bergmann static void 13067207b96SArnd Bergmann spufs_delete_inode(struct inode *inode) 13167207b96SArnd Bergmann { 13267207b96SArnd Bergmann if (SPUFS_I(inode)->i_ctx) 13367207b96SArnd Bergmann put_spu_context(SPUFS_I(inode)->i_ctx); 13467207b96SArnd Bergmann clear_inode(inode); 13567207b96SArnd Bergmann } 13667207b96SArnd Bergmann 1373f51dd91SArnd Bergmann static void spufs_prune_dir(struct dentry *dir) 1383f51dd91SArnd Bergmann { 1393f51dd91SArnd Bergmann struct dentry *dentry, *tmp; 1401b1dcc1bSJes Sorensen mutex_lock(&dir->d_inode->i_mutex); 141c3a9aea7SAndrew Morton list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { 1423f51dd91SArnd Bergmann spin_lock(&dcache_lock); 1433f51dd91SArnd Bergmann spin_lock(&dentry->d_lock); 1443f51dd91SArnd Bergmann if (!(d_unhashed(dentry)) && dentry->d_inode) { 1453f51dd91SArnd Bergmann dget_locked(dentry); 1463f51dd91SArnd Bergmann __d_drop(dentry); 1473f51dd91SArnd Bergmann spin_unlock(&dentry->d_lock); 1483f51dd91SArnd Bergmann simple_unlink(dir->d_inode, dentry); 1493f51dd91SArnd Bergmann spin_unlock(&dcache_lock); 1503f51dd91SArnd Bergmann dput(dentry); 1513f51dd91SArnd Bergmann } else { 1523f51dd91SArnd Bergmann spin_unlock(&dentry->d_lock); 1533f51dd91SArnd Bergmann spin_unlock(&dcache_lock); 1543f51dd91SArnd Bergmann } 1553f51dd91SArnd Bergmann } 1563f51dd91SArnd Bergmann shrink_dcache_parent(dir); 1571b1dcc1bSJes Sorensen mutex_unlock(&dir->d_inode->i_mutex); 1583f51dd91SArnd Bergmann } 1593f51dd91SArnd Bergmann 1600309f02dSMichael Ellerman /* Caller must hold root->i_mutex */ 1613f51dd91SArnd Bergmann static int spufs_rmdir(struct inode *root, struct dentry *dir_dentry) 1623f51dd91SArnd Bergmann { 1633f51dd91SArnd Bergmann /* remove all entries */ 1643f51dd91SArnd Bergmann spufs_prune_dir(dir_dentry); 1653f51dd91SArnd Bergmann 1663f51dd91SArnd Bergmann return simple_rmdir(root, dir_dentry); 1673f51dd91SArnd Bergmann } 1683f51dd91SArnd Bergmann 1693f51dd91SArnd Bergmann static int spufs_fill_dir(struct dentry *dir, struct tree_descr *files, 17067207b96SArnd Bergmann int mode, struct spu_context *ctx) 17167207b96SArnd Bergmann { 17267207b96SArnd Bergmann struct dentry *dentry; 17367207b96SArnd Bergmann int ret; 17467207b96SArnd Bergmann 17567207b96SArnd Bergmann while (files->name && files->name[0]) { 17667207b96SArnd Bergmann ret = -ENOMEM; 17767207b96SArnd Bergmann dentry = d_alloc_name(dir, files->name); 17867207b96SArnd Bergmann if (!dentry) 17967207b96SArnd Bergmann goto out; 18067207b96SArnd Bergmann ret = spufs_new_file(dir->d_sb, dentry, files->ops, 18167207b96SArnd Bergmann files->mode & mode, ctx); 18267207b96SArnd Bergmann if (ret) 18367207b96SArnd Bergmann goto out; 18467207b96SArnd Bergmann files++; 18567207b96SArnd Bergmann } 18667207b96SArnd Bergmann return 0; 18767207b96SArnd Bergmann out: 1883f51dd91SArnd Bergmann spufs_prune_dir(dir); 18967207b96SArnd Bergmann return ret; 19067207b96SArnd Bergmann } 19167207b96SArnd Bergmann 19267207b96SArnd Bergmann static int spufs_dir_close(struct inode *inode, struct file *file) 19367207b96SArnd Bergmann { 1940309f02dSMichael Ellerman struct spu_context *ctx; 19567207b96SArnd Bergmann struct inode *dir; 19667207b96SArnd Bergmann struct dentry *dentry; 19767207b96SArnd Bergmann int ret; 19867207b96SArnd Bergmann 19967207b96SArnd Bergmann dentry = file->f_dentry; 20067207b96SArnd Bergmann dir = dentry->d_parent->d_inode; 2010309f02dSMichael Ellerman ctx = SPUFS_I(dentry->d_inode)->i_ctx; 202c8ca0633SArnd Bergmann 2030309f02dSMichael Ellerman mutex_lock(&dir->i_mutex); 204c8ca0633SArnd Bergmann ret = spufs_rmdir(dir, dentry); 2050309f02dSMichael Ellerman mutex_unlock(&dir->i_mutex); 20667207b96SArnd Bergmann WARN_ON(ret); 207c8ca0633SArnd Bergmann 2080309f02dSMichael Ellerman /* We have to give up the mm_struct */ 2090309f02dSMichael Ellerman spu_forget(ctx); 2100309f02dSMichael Ellerman 21167207b96SArnd Bergmann return dcache_dir_close(inode, file); 21267207b96SArnd Bergmann } 21367207b96SArnd Bergmann 21467207b96SArnd Bergmann struct inode_operations spufs_dir_inode_operations = { 21567207b96SArnd Bergmann .lookup = simple_lookup, 21667207b96SArnd Bergmann }; 21767207b96SArnd Bergmann 218e80358adSArnd Bergmann struct file_operations spufs_context_fops = { 21967207b96SArnd Bergmann .open = dcache_dir_open, 22067207b96SArnd Bergmann .release = spufs_dir_close, 22167207b96SArnd Bergmann .llseek = dcache_dir_lseek, 22267207b96SArnd Bergmann .read = generic_read_dir, 22367207b96SArnd Bergmann .readdir = dcache_readdir, 22467207b96SArnd Bergmann .fsync = simple_sync_file, 22567207b96SArnd Bergmann }; 22667207b96SArnd Bergmann 22767207b96SArnd Bergmann static int 22867207b96SArnd Bergmann spufs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 22967207b96SArnd Bergmann { 23067207b96SArnd Bergmann int ret; 23167207b96SArnd Bergmann struct inode *inode; 23267207b96SArnd Bergmann struct spu_context *ctx; 23367207b96SArnd Bergmann 23467207b96SArnd Bergmann ret = -ENOSPC; 23567207b96SArnd Bergmann inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 23667207b96SArnd Bergmann if (!inode) 23767207b96SArnd Bergmann goto out; 23867207b96SArnd Bergmann 23967207b96SArnd Bergmann if (dir->i_mode & S_ISGID) { 24067207b96SArnd Bergmann inode->i_gid = dir->i_gid; 24167207b96SArnd Bergmann inode->i_mode &= S_ISGID; 24267207b96SArnd Bergmann } 2436df10a82SMark Nutter ctx = alloc_spu_context(); 24467207b96SArnd Bergmann SPUFS_I(inode)->i_ctx = ctx; 24567207b96SArnd Bergmann if (!ctx) 24667207b96SArnd Bergmann goto out_iput; 24767207b96SArnd Bergmann 24867207b96SArnd Bergmann inode->i_op = &spufs_dir_inode_operations; 24967207b96SArnd Bergmann inode->i_fop = &simple_dir_operations; 25067207b96SArnd Bergmann ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 25167207b96SArnd Bergmann if (ret) 25267207b96SArnd Bergmann goto out_free_ctx; 25367207b96SArnd Bergmann 25467207b96SArnd Bergmann d_instantiate(dentry, inode); 25567207b96SArnd Bergmann dget(dentry); 25667207b96SArnd Bergmann dir->i_nlink++; 257346f4d3cSArnd Bergmann dentry->d_inode->i_nlink++; 25867207b96SArnd Bergmann goto out; 25967207b96SArnd Bergmann 26067207b96SArnd Bergmann out_free_ctx: 26167207b96SArnd Bergmann put_spu_context(ctx); 26267207b96SArnd Bergmann out_iput: 26367207b96SArnd Bergmann iput(inode); 26467207b96SArnd Bergmann out: 26567207b96SArnd Bergmann return ret; 26667207b96SArnd Bergmann } 26767207b96SArnd Bergmann 268346f4d3cSArnd Bergmann static int spufs_context_open(struct dentry *dentry, struct vfsmount *mnt) 269346f4d3cSArnd Bergmann { 270346f4d3cSArnd Bergmann int ret; 271346f4d3cSArnd Bergmann struct file *filp; 272346f4d3cSArnd Bergmann 273346f4d3cSArnd Bergmann ret = get_unused_fd(); 274346f4d3cSArnd Bergmann if (ret < 0) { 275346f4d3cSArnd Bergmann dput(dentry); 276346f4d3cSArnd Bergmann mntput(mnt); 277346f4d3cSArnd Bergmann goto out; 278346f4d3cSArnd Bergmann } 279346f4d3cSArnd Bergmann 280346f4d3cSArnd Bergmann filp = dentry_open(dentry, mnt, O_RDONLY); 281346f4d3cSArnd Bergmann if (IS_ERR(filp)) { 282346f4d3cSArnd Bergmann put_unused_fd(ret); 283346f4d3cSArnd Bergmann ret = PTR_ERR(filp); 284346f4d3cSArnd Bergmann goto out; 285346f4d3cSArnd Bergmann } 286346f4d3cSArnd Bergmann 287346f4d3cSArnd Bergmann filp->f_op = &spufs_context_fops; 288346f4d3cSArnd Bergmann fd_install(ret, filp); 289346f4d3cSArnd Bergmann out: 290346f4d3cSArnd Bergmann return ret; 291346f4d3cSArnd Bergmann } 292346f4d3cSArnd Bergmann 293346f4d3cSArnd Bergmann static struct file_system_type spufs_type; 294346f4d3cSArnd Bergmann 2956ff730c3SArnd Bergmann long spufs_create_thread(struct nameidata *nd, 29667207b96SArnd Bergmann unsigned int flags, mode_t mode) 29767207b96SArnd Bergmann { 29867207b96SArnd Bergmann struct dentry *dentry; 29967207b96SArnd Bergmann int ret; 30067207b96SArnd Bergmann 30167207b96SArnd Bergmann /* need to be at the root of spufs */ 30267207b96SArnd Bergmann ret = -EINVAL; 303346f4d3cSArnd Bergmann if (nd->dentry->d_sb->s_type != &spufs_type || 30467207b96SArnd Bergmann nd->dentry != nd->dentry->d_sb->s_root) 30567207b96SArnd Bergmann goto out; 30667207b96SArnd Bergmann 307*c9832948Sarnd@arndb.de /* all flags are reserved */ 308*c9832948Sarnd@arndb.de if (flags) 309*c9832948Sarnd@arndb.de goto out; 310*c9832948Sarnd@arndb.de 31167207b96SArnd Bergmann dentry = lookup_create(nd, 1); 31267207b96SArnd Bergmann ret = PTR_ERR(dentry); 31367207b96SArnd Bergmann if (IS_ERR(dentry)) 31467207b96SArnd Bergmann goto out_dir; 31567207b96SArnd Bergmann 31667207b96SArnd Bergmann ret = -EEXIST; 31767207b96SArnd Bergmann if (dentry->d_inode) 31867207b96SArnd Bergmann goto out_dput; 31967207b96SArnd Bergmann 32067207b96SArnd Bergmann mode &= ~current->fs->umask; 32167207b96SArnd Bergmann ret = spufs_mkdir(nd->dentry->d_inode, dentry, mode & S_IRWXUGO); 32267207b96SArnd Bergmann if (ret) 32367207b96SArnd Bergmann goto out_dput; 32467207b96SArnd Bergmann 325346f4d3cSArnd Bergmann /* 326346f4d3cSArnd Bergmann * get references for dget and mntget, will be released 327346f4d3cSArnd Bergmann * in error path of *_open(). 328346f4d3cSArnd Bergmann */ 329346f4d3cSArnd Bergmann ret = spufs_context_open(dget(dentry), mntget(nd->mnt)); 3300309f02dSMichael Ellerman if (ret < 0) { 3310309f02dSMichael Ellerman WARN_ON(spufs_rmdir(nd->dentry->d_inode, dentry)); 3320309f02dSMichael Ellerman mutex_unlock(&nd->dentry->d_inode->i_mutex); 3330309f02dSMichael Ellerman spu_forget(SPUFS_I(dentry->d_inode)->i_ctx); 3340309f02dSMichael Ellerman dput(dentry); 3350309f02dSMichael Ellerman goto out; 3360309f02dSMichael Ellerman } 33767207b96SArnd Bergmann 33867207b96SArnd Bergmann out_dput: 33967207b96SArnd Bergmann dput(dentry); 34067207b96SArnd Bergmann out_dir: 3411b1dcc1bSJes Sorensen mutex_unlock(&nd->dentry->d_inode->i_mutex); 34267207b96SArnd Bergmann out: 34367207b96SArnd Bergmann return ret; 34467207b96SArnd Bergmann } 34567207b96SArnd Bergmann 34667207b96SArnd Bergmann /* File system initialization */ 34767207b96SArnd Bergmann enum { 34867207b96SArnd Bergmann Opt_uid, Opt_gid, Opt_err, 34967207b96SArnd Bergmann }; 35067207b96SArnd Bergmann 35167207b96SArnd Bergmann static match_table_t spufs_tokens = { 35267207b96SArnd Bergmann { Opt_uid, "uid=%d" }, 35367207b96SArnd Bergmann { Opt_gid, "gid=%d" }, 35467207b96SArnd Bergmann { Opt_err, NULL }, 35567207b96SArnd Bergmann }; 35667207b96SArnd Bergmann 35767207b96SArnd Bergmann static int 35867207b96SArnd Bergmann spufs_parse_options(char *options, struct inode *root) 35967207b96SArnd Bergmann { 36067207b96SArnd Bergmann char *p; 36167207b96SArnd Bergmann substring_t args[MAX_OPT_ARGS]; 36267207b96SArnd Bergmann 36367207b96SArnd Bergmann while ((p = strsep(&options, ",")) != NULL) { 36467207b96SArnd Bergmann int token, option; 36567207b96SArnd Bergmann 36667207b96SArnd Bergmann if (!*p) 36767207b96SArnd Bergmann continue; 36867207b96SArnd Bergmann 36967207b96SArnd Bergmann token = match_token(p, spufs_tokens, args); 37067207b96SArnd Bergmann switch (token) { 37167207b96SArnd Bergmann case Opt_uid: 37267207b96SArnd Bergmann if (match_int(&args[0], &option)) 37367207b96SArnd Bergmann return 0; 37467207b96SArnd Bergmann root->i_uid = option; 37567207b96SArnd Bergmann break; 37667207b96SArnd Bergmann case Opt_gid: 37767207b96SArnd Bergmann if (match_int(&args[0], &option)) 37867207b96SArnd Bergmann return 0; 37967207b96SArnd Bergmann root->i_gid = option; 38067207b96SArnd Bergmann break; 38167207b96SArnd Bergmann default: 38267207b96SArnd Bergmann return 0; 38367207b96SArnd Bergmann } 38467207b96SArnd Bergmann } 38567207b96SArnd Bergmann return 1; 38667207b96SArnd Bergmann } 38767207b96SArnd Bergmann 38867207b96SArnd Bergmann static int 3898b3d6663SArnd Bergmann spufs_create_root(struct super_block *sb, void *data) 3908b3d6663SArnd Bergmann { 39167207b96SArnd Bergmann struct inode *inode; 39267207b96SArnd Bergmann int ret; 39367207b96SArnd Bergmann 39467207b96SArnd Bergmann ret = -ENOMEM; 39567207b96SArnd Bergmann inode = spufs_new_inode(sb, S_IFDIR | 0775); 39667207b96SArnd Bergmann if (!inode) 39767207b96SArnd Bergmann goto out; 39867207b96SArnd Bergmann 39967207b96SArnd Bergmann inode->i_op = &spufs_dir_inode_operations; 40067207b96SArnd Bergmann inode->i_fop = &simple_dir_operations; 40167207b96SArnd Bergmann SPUFS_I(inode)->i_ctx = NULL; 40267207b96SArnd Bergmann 40367207b96SArnd Bergmann ret = -EINVAL; 40467207b96SArnd Bergmann if (!spufs_parse_options(data, inode)) 40567207b96SArnd Bergmann goto out_iput; 40667207b96SArnd Bergmann 40767207b96SArnd Bergmann ret = -ENOMEM; 40867207b96SArnd Bergmann sb->s_root = d_alloc_root(inode); 40967207b96SArnd Bergmann if (!sb->s_root) 41067207b96SArnd Bergmann goto out_iput; 41167207b96SArnd Bergmann 41267207b96SArnd Bergmann return 0; 41367207b96SArnd Bergmann out_iput: 41467207b96SArnd Bergmann iput(inode); 41567207b96SArnd Bergmann out: 41667207b96SArnd Bergmann return ret; 41767207b96SArnd Bergmann } 41867207b96SArnd Bergmann 41967207b96SArnd Bergmann static int 42067207b96SArnd Bergmann spufs_fill_super(struct super_block *sb, void *data, int silent) 42167207b96SArnd Bergmann { 42267207b96SArnd Bergmann static struct super_operations s_ops = { 42367207b96SArnd Bergmann .alloc_inode = spufs_alloc_inode, 42467207b96SArnd Bergmann .destroy_inode = spufs_destroy_inode, 42567207b96SArnd Bergmann .statfs = simple_statfs, 42667207b96SArnd Bergmann .delete_inode = spufs_delete_inode, 42767207b96SArnd Bergmann .drop_inode = generic_delete_inode, 42867207b96SArnd Bergmann }; 42967207b96SArnd Bergmann 43067207b96SArnd Bergmann sb->s_maxbytes = MAX_LFS_FILESIZE; 43167207b96SArnd Bergmann sb->s_blocksize = PAGE_CACHE_SIZE; 43267207b96SArnd Bergmann sb->s_blocksize_bits = PAGE_CACHE_SHIFT; 43367207b96SArnd Bergmann sb->s_magic = SPUFS_MAGIC; 43467207b96SArnd Bergmann sb->s_op = &s_ops; 43567207b96SArnd Bergmann 43667207b96SArnd Bergmann return spufs_create_root(sb, data); 43767207b96SArnd Bergmann } 43867207b96SArnd Bergmann 43967207b96SArnd Bergmann static struct super_block * 44067207b96SArnd Bergmann spufs_get_sb(struct file_system_type *fstype, int flags, 44167207b96SArnd Bergmann const char *name, void *data) 44267207b96SArnd Bergmann { 44367207b96SArnd Bergmann return get_sb_single(fstype, flags, data, spufs_fill_super); 44467207b96SArnd Bergmann } 44567207b96SArnd Bergmann 44667207b96SArnd Bergmann static struct file_system_type spufs_type = { 44767207b96SArnd Bergmann .owner = THIS_MODULE, 44867207b96SArnd Bergmann .name = "spufs", 44967207b96SArnd Bergmann .get_sb = spufs_get_sb, 45067207b96SArnd Bergmann .kill_sb = kill_litter_super, 45167207b96SArnd Bergmann }; 45267207b96SArnd Bergmann 453e78b47a5SArnd Bergmann static int __init spufs_init(void) 45467207b96SArnd Bergmann { 45567207b96SArnd Bergmann int ret; 45667207b96SArnd Bergmann ret = -ENOMEM; 45767207b96SArnd Bergmann spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 45867207b96SArnd Bergmann sizeof(struct spufs_inode_info), 0, 45967207b96SArnd Bergmann SLAB_HWCACHE_ALIGN, spufs_init_once, NULL); 46067207b96SArnd Bergmann 46167207b96SArnd Bergmann if (!spufs_inode_cache) 46267207b96SArnd Bergmann goto out; 4638b3d6663SArnd Bergmann if (spu_sched_init() != 0) { 4648b3d6663SArnd Bergmann kmem_cache_destroy(spufs_inode_cache); 4658b3d6663SArnd Bergmann goto out; 4668b3d6663SArnd Bergmann } 46767207b96SArnd Bergmann ret = register_filesystem(&spufs_type); 46867207b96SArnd Bergmann if (ret) 46967207b96SArnd Bergmann goto out_cache; 47067207b96SArnd Bergmann ret = register_spu_syscalls(&spufs_calls); 47167207b96SArnd Bergmann if (ret) 47267207b96SArnd Bergmann goto out_fs; 47367207b96SArnd Bergmann return 0; 47467207b96SArnd Bergmann out_fs: 47567207b96SArnd Bergmann unregister_filesystem(&spufs_type); 47667207b96SArnd Bergmann out_cache: 47767207b96SArnd Bergmann kmem_cache_destroy(spufs_inode_cache); 47867207b96SArnd Bergmann out: 47967207b96SArnd Bergmann return ret; 48067207b96SArnd Bergmann } 48167207b96SArnd Bergmann module_init(spufs_init); 48267207b96SArnd Bergmann 483e78b47a5SArnd Bergmann static void __exit spufs_exit(void) 48467207b96SArnd Bergmann { 4858b3d6663SArnd Bergmann spu_sched_exit(); 48667207b96SArnd Bergmann unregister_spu_syscalls(&spufs_calls); 48767207b96SArnd Bergmann unregister_filesystem(&spufs_type); 48867207b96SArnd Bergmann kmem_cache_destroy(spufs_inode_cache); 48967207b96SArnd Bergmann } 49067207b96SArnd Bergmann module_exit(spufs_exit); 49167207b96SArnd Bergmann 49267207b96SArnd Bergmann MODULE_LICENSE("GPL"); 49367207b96SArnd Bergmann MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 49467207b96SArnd Bergmann 495