/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Lustre Light Super operations * * Copyright (c) 2002, 2003 Cluster File Systems, Inc. * * This file is part of Lustre, http://www.lustre.org. * * Lustre is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Lustre is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Lustre; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define DEBUG_SUBSYSTEM S_LLITE #include #include #include #include #include #include #include #include #include #include "llite_internal.h" #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) #include kmem_cache_t *ll_file_data_slab; extern struct address_space_operations ll_aops; extern struct address_space_operations ll_dir_aops; struct super_operations ll_super_operations; /* /proc/lustre/llite root that tracks llite mount points */ struct proc_dir_entry *proc_lustre_fs_root = NULL; /* lproc_llite.c */ extern int lprocfs_register_mountpoint(struct proc_dir_entry *parent, struct super_block *sb, char *osc, char *mdc); extern int ll_init_inodecache(void); extern void ll_destroy_inodecache(void); extern int ll_recover(struct recovd_data *, int); extern int ll_commitcbd_setup(struct ll_sb_info *); extern int ll_commitcbd_cleanup(struct ll_sb_info *); int ll_read_inode2(struct inode *inode, void *opaque); extern int ll_proc_namespace(struct super_block* sb, char* osc, char* mdc); static char *ll_read_opt(const char *opt, char *data) { char *value; char *retval; ENTRY; CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data); if (strncmp(opt, data, strlen(opt))) RETURN(NULL); if ((value = strchr(data, '=')) == NULL) RETURN(NULL); value++; OBD_ALLOC(retval, strlen(value) + 1); if (!retval) { CERROR("out of memory!\n"); RETURN(NULL); } memcpy(retval, value, strlen(value)+1); CDEBUG(D_SUPER, "Assigned option: %s, value %s\n", opt, retval); RETURN(retval); } static int ll_set_opt(const char *opt, char *data, int fl) { ENTRY; CDEBUG(D_SUPER, "option: %s, data %s\n", opt, data); if (strncmp(opt, data, strlen(opt))) RETURN(0); else RETURN(fl); } static void ll_options(char *options, char **ost, char **mds, int *flags) { char *opt_ptr = options; char *this_char; ENTRY; if (!options) { EXIT; return; } while ((this_char = strsep (&opt_ptr, ",")) != NULL) { CDEBUG(D_SUPER, "this_char %s\n", this_char); if ((!*ost && (*ost = ll_read_opt("osc", this_char)))|| (!*mds && (*mds = ll_read_opt("mdc", this_char)))|| (!(*flags & LL_SBI_NOLCK) && ((*flags) = (*flags) | ll_set_opt("nolock", this_char, LL_SBI_NOLCK)))) continue; } EXIT; } #ifndef log2 #define log2(n) ffz(~(n)) #endif static int ll_fill_super(struct super_block *sb, void *data, int silent) { struct inode *root = 0; struct obd_device *obd; struct ll_sb_info *sbi; char *osc = NULL; char *mdc = NULL; int err; struct ll_fid rootfid; struct obd_statfs osfs; struct ptlrpc_request *request = NULL; struct ptlrpc_connection *mdc_conn; struct ll_read_inode2_cookie lic; class_uuid_t uuid; struct obd_uuid param_uuid; ENTRY; CDEBUG(D_VFSTRACE, "VFS Op:\n"); OBD_ALLOC(sbi, sizeof(*sbi)); if (!sbi) RETURN(-ENOMEM); INIT_LIST_HEAD(&sbi->ll_conn_chain); INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list); generate_random_uuid(uuid); class_uuid_unparse(uuid, &sbi->ll_sb_uuid); sb->s_fs_info = sbi; ll_options(data, &osc, &mdc, &sbi->ll_flags); if (!osc) { CERROR("no osc\n"); GOTO(out_free, sb = NULL); } if (!mdc) { CERROR("no mdc\n"); GOTO(out_free, sb = NULL); } strncpy(param_uuid.uuid, mdc, sizeof(param_uuid.uuid)); obd = class_uuid2obd(¶m_uuid); if (!obd) { CERROR("MDC %s: not setup or attached\n", mdc); GOTO(out_free, sb = NULL); } err = obd_connect(&sbi->ll_mdc_conn, obd, &sbi->ll_sb_uuid); if (err) { CERROR("cannot connect to %s: rc = %d\n", mdc, err); GOTO(out_free, sb = NULL); } mdc_conn = sbi2mdc(sbi)->cl_import->imp_connection; strncpy(param_uuid.uuid, osc, sizeof(param_uuid.uuid)); obd = class_uuid2obd(¶m_uuid); if (!obd) { CERROR("OSC %s: not setup or attached\n", osc); GOTO(out_mdc, sb = NULL); } err = obd_connect(&sbi->ll_osc_conn, obd, &sbi->ll_sb_uuid); if (err) { CERROR("cannot connect to %s: rc = %d\n", osc, err); GOTO(out_mdc, sb = NULL); } err = mdc_getstatus(&sbi->ll_mdc_conn, &rootfid); if (err) { CERROR("cannot mds_connect: rc = %d\n", err); GOTO(out_osc, sb = NULL); } CDEBUG(D_SUPER, "rootfid "LPU64"\n", rootfid.id); sbi->ll_rootino = rootfid.id; memset(&osfs, 0, sizeof(osfs)); err = obd_statfs(&sbi->ll_mdc_conn, &osfs); sb->s_blocksize = osfs.os_bsize; sb->s_blocksize_bits = log2(osfs.os_bsize); sb->s_magic = LL_SUPER_MAGIC; sb->s_maxbytes = PAGE_CACHE_MAXBYTES; sb->s_op = &ll_super_operations; /* make root inode * XXX: move this to after cbd setup? */ err = mdc_getattr(&sbi->ll_mdc_conn, &rootfid, OBD_MD_FLNOTOBD|OBD_MD_FLBLOCKS, 0, &request); if (err) { CERROR("mdc_getattr failed for root: rc = %d\n", err); GOTO(out_osc, sb = NULL); } /* initialize committed transaction callback daemon */ spin_lock_init(&sbi->ll_commitcbd_lock); init_waitqueue_head(&sbi->ll_commitcbd_waitq); init_waitqueue_head(&sbi->ll_commitcbd_ctl_waitq); sbi->ll_commitcbd_flags = 0; err = ll_commitcbd_setup(sbi); if (err) { CERROR("failed to start commit callback daemon: rc = %d\n",err); ptlrpc_req_finished (request); GOTO(out_osc, sb = NULL); } lic.lic_body = lustre_msg_buf(request->rq_repmsg, 0, sizeof (*lic.lic_body)); LASSERT (lic.lic_body != NULL); /* checked by mdc_getattr() */ LASSERT_REPSWABBED (request, 0); /* swabbed by mdc_getattr() */ lic.lic_lsm = NULL; root = iget5_locked(sb, sbi->ll_rootino, NULL, ll_read_inode2, &lic); ptlrpc_req_finished(request); if (root == NULL || is_bad_inode(root)) { /* XXX might need iput() for bad inode */ CERROR("lustre_lite: bad iget5 for root\n"); GOTO(out_cbd, sb = NULL); } sb->s_root = d_alloc_root(root); root->i_state &= ~(I_LOCK | I_NEW); printk("AMRUT 1\n"); if (proc_lustre_fs_root) { err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb, osc, mdc); if (err < 0) CERROR("could not register mount in /proc/lustre"); } out_dev: if (mdc) OBD_FREE(mdc, strlen(mdc) + 1); if (osc) OBD_FREE(osc, strlen(osc) + 1); printk("AMRUT 2\n"); RETURN(0); out_cbd: ll_commitcbd_cleanup(sbi); out_osc: obd_disconnect(&sbi->ll_osc_conn, 0); out_mdc: obd_disconnect(&sbi->ll_mdc_conn, 0); out_free: OBD_FREE(sbi, sizeof(*sbi)); goto out_dev; } /* ll_fill_super */ int ll_setattr_raw(struct inode *inode, struct iattr *attr) { struct ptlrpc_request *request = NULL; struct ll_sb_info *sbi = ll_i2sbi(inode); struct mdc_op_data op_data; int err = 0; ENTRY; CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu\n", inode->i_ino); if ((attr->ia_valid & ATTR_SIZE)) { /* writeback uses inode->i_size to determine how far out * its cached pages go. ll_truncate gets a PW lock, canceling * our lock, _after_ it has updated i_size. this can confuse * us into zero extending the file to the newly truncated * size, and this has bad implications for a racing o_append. * if we're extending our size we need to flush the pages * with the correct i_size before vmtruncate stomps on * the new i_size. again, this can only find pages to * purge if the PW lock that generated them is still held. */ if ( attr->ia_size > inode->i_size ) { filemap_fdatasync(inode->i_mapping); filemap_fdatawait(inode->i_mapping); } err = vmtruncate(inode, attr->ia_size); if (err) RETURN(err); } /* Don't send size changes to MDS to avoid "fast EA" problems, and * also avoid a pointless RPC (we get file size from OST anyways). */ attr->ia_valid &= ~ATTR_SIZE; if (!attr->ia_valid) RETURN(0); ll_prepare_mdc_op_data(&op_data, inode, NULL, NULL, 0, 0); err = mdc_setattr(&sbi->ll_mdc_conn, &op_data, attr, NULL, 0, &request); if (err) CERROR("mdc_setattr fails: err = %d\n", err); ptlrpc_req_finished(request); if (S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_MTIME_SET) { struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd; struct obdo oa; int err2; CDEBUG(D_INODE, "set mtime on OST inode %lu to %lu\n", inode->i_ino, attr->ia_mtime); oa.o_id = lsm->lsm_object_id; oa.o_mode = S_IFREG; oa.o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMTIME; oa.o_mtime = LTIME_S(attr->ia_mtime); err2 = obd_setattr(&sbi->ll_osc_conn, &oa, lsm, NULL); if (err2) { CERROR("obd_setattr fails: rc=%d\n", err); if (!err) err = err2; } } RETURN(err); } struct super_block * ll_get_sb(struct file_system_type *fs_type, int flags, char *devname, void * data) { return get_sb_nodev(fs_type, flags, data, ll_fill_super); } static void ll_put_super(struct super_block *sb) { struct ll_sb_info *sbi = ll_s2sbi(sb); struct list_head *tmp, *next; struct ll_fid rootfid; ENTRY; CDEBUG(D_VFSTRACE, "VFS Op:\n"); list_del(&sbi->ll_conn_chain); ll_commitcbd_cleanup(sbi); obd_disconnect(&sbi->ll_osc_conn, 0); /* NULL request to force sync on the MDS, and get the last_committed * value to flush remaining RPCs from the pending queue on client. * * XXX This should be an mdc_sync() call to sync the whole MDS fs, * which we can call for other reasons as well. */ mdc_getstatus(&sbi->ll_mdc_conn, &rootfid); if (sbi->ll_proc_root) { lprocfs_remove(sbi->ll_proc_root); sbi->ll_proc_root = NULL; } obd_disconnect(&sbi->ll_mdc_conn, 0); spin_lock(&dcache_lock); list_for_each_safe(tmp, next, &sbi->ll_orphan_dentry_list){ struct dentry *dentry = list_entry(tmp, struct dentry, d_hash); shrink_dcache_parent(dentry); } spin_unlock(&dcache_lock); OBD_FREE(sbi, sizeof(*sbi)); EXIT; } /* ll_put_super */ static void ll_clear_inode(struct inode *inode) { struct ll_sb_info *sbi = ll_i2sbi(inode); struct ll_inode_info *lli = ll_i2info(inode); int rc; ENTRY; CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu\n", inode->i_ino); #warning "Is there a reason we don't do this in 2.5, but we do in 2.4?" #if 0 rc = ll_mdc_cancel_unused(&sbi->ll_mdc_conn, inode, LDLM_FL_NO_CALLBACK); if (rc < 0) { CERROR("ll_mdc_cancel_unused: %d\n", rc); /* XXX FIXME do something dramatic */ } if (lli->lli_smd) { rc = obd_cancel_unused(&sbi->ll_osc_conn, lli->lli_smd, 0); if (rc < 0) { CERROR("obd_cancel_unused: %d\n", rc); /* XXX FIXME do something dramatic */ } } #endif if (atomic_read(&inode->i_count) != 0) CERROR("clearing in-use inode %lu: count = %d\n", inode->i_ino, atomic_read(&inode->i_count)); if (lli->lli_smd) { obd_free_memmd(&sbi->ll_osc_conn, &lli->lli_smd); lli->lli_smd = NULL; } if (lli->lli_symlink_name) { OBD_FREE(lli->lli_symlink_name,strlen(lli->lli_symlink_name)+1); lli->lli_symlink_name = NULL; } EXIT; } #if 0 static void ll_delete_inode(struct inode *inode) { ENTRY; CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu\n", inode->i_ino); if (S_ISREG(inode->i_mode)) { int err; struct obdo *oa; struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd; /* mcreate with no open */ if (!lsm) GOTO(out, 0); if (lsm->lsm_object_id == 0) { CERROR("This really happens\n"); /* No obdo was ever created */ GOTO(out, 0); } oa = obdo_alloc(); if (oa == NULL) GOTO(out, -ENOMEM); oa->o_id = lsm->lsm_object_id; oa->o_mode = inode->i_mode; oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE; err = obd_destroy(ll_i2obdconn(inode), oa, lsm); obdo_free(oa); if (err) CDEBUG(D_SUPER, "obd destroy objid "LPX64" error %d\n", lsm->lsm_object_id, err); } out: clear_inode(inode); EXIT; } #endif /* like inode_setattr, but doesn't mark the inode dirty */ static int ll_attr2inode(struct inode * inode, struct iattr * attr, int trunc) { unsigned int ia_valid = attr->ia_valid; int error = 0; if ((ia_valid & ATTR_SIZE) && trunc) { if (attr->ia_size > ll_file_maxbytes(inode)) { error = -EFBIG; goto out; } error = vmtruncate(inode, attr->ia_size); if (error) goto out; } else if (ia_valid & ATTR_SIZE) inode->i_size = attr->ia_size; if (ia_valid & ATTR_UID) inode->i_uid = attr->ia_uid; if (ia_valid & ATTR_GID) inode->i_gid = attr->ia_gid; if (ia_valid & ATTR_ATIME) inode->i_atime = attr->ia_atime; if (ia_valid & ATTR_MTIME) inode->i_mtime = attr->ia_mtime; if (ia_valid & ATTR_CTIME) inode->i_ctime = attr->ia_ctime; if (ia_valid & ATTR_MODE) { inode->i_mode = attr->ia_mode; if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) inode->i_mode &= ~S_ISGID; } out: return error; } int ll_inode_setattr(struct inode *inode, struct iattr *attr, int do_trunc) { struct ptlrpc_request *request = NULL; struct ll_sb_info *sbi = ll_i2sbi(inode); int err = 0; ENTRY; /* change incore inode */ err = ll_attr2inode(inode, attr, do_trunc); if (err) RETURN(err); /* Don't send size changes to MDS to avoid "fast EA" problems, and * also avoid a pointless RPC (we get file size from OST anyways). */ attr->ia_valid &= ~ATTR_SIZE; if (attr->ia_valid) { struct mdc_op_data op_data; ll_prepare_mdc_op_data(&op_data, inode, NULL, NULL, 0, 0); err = mdc_setattr(&sbi->ll_mdc_conn, &op_data, attr, NULL, 0, &request); if (err) CERROR("mdc_setattr fails: err = %d\n", err); ptlrpc_req_finished(request); if (S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_MTIME_SET) { struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd; struct obdo oa; int err2; CDEBUG(D_ERROR, "setting mtime on OST\n"); oa.o_id = lsm->lsm_object_id; oa.o_mode = S_IFREG; oa.o_valid = OBD_MD_FLID |OBD_MD_FLTYPE |OBD_MD_FLMTIME; oa.o_mtime = LTIME_S(attr->ia_mtime); err2 = obd_setattr(&sbi->ll_osc_conn, &oa, lsm, NULL); if (err2) { CERROR("obd_setattr fails: rc=%d\n", err); if (!err) err = err2; } } } RETURN(err); } int ll_setattr(struct dentry *de, struct iattr *attr) { int rc = inode_change_ok(de->d_inode, attr); CDEBUG(D_VFSTRACE, "VFS Op:name=%s\n", de->d_name.name); if (rc) return rc; return ll_inode_setattr(de->d_inode, attr, 1); } static int ll_statfs(struct super_block *sb, struct statfs *sfs) { struct ll_sb_info *sbi = ll_s2sbi(sb); struct obd_statfs osfs; int rc; ENTRY; CDEBUG(D_VFSTRACE, "VFS Op:\n"); memset(sfs, 0, sizeof(*sfs)); rc = obd_statfs(&sbi->ll_mdc_conn, &osfs); statfs_unpack(sfs, &osfs); if (rc) CERROR("mdc_statfs fails: rc = %d\n", rc); else CDEBUG(D_SUPER, "mdc_statfs shows blocks "LPU64"/"LPU64 " objects "LPU64"/"LPU64"\n", osfs.os_bavail, osfs.os_blocks, osfs.os_ffree, osfs.os_files); /* temporary until mds_statfs returns statfs info for all OSTs */ if (!rc) { rc = obd_statfs(&sbi->ll_osc_conn, &osfs); if (rc) { CERROR("obd_statfs fails: rc = %d\n", rc); GOTO(out, rc); } CDEBUG(D_SUPER, "obd_statfs shows blocks "LPU64"/"LPU64 " objects "LPU64"/"LPU64"\n", osfs.os_bavail, osfs.os_blocks, osfs.os_ffree, osfs.os_files); while (osfs.os_blocks > ~0UL) { sfs->f_bsize <<= 1; osfs.os_blocks >>= 1; osfs.os_bfree >>= 1; osfs.os_bavail >>= 1; } sfs->f_blocks = osfs.os_blocks; sfs->f_bfree = osfs.os_bfree; sfs->f_bavail = osfs.os_bavail; if (osfs.os_ffree < (__u64)sfs->f_ffree) { sfs->f_files = (sfs->f_files - sfs->f_ffree) + osfs.os_ffree; sfs->f_ffree = osfs.os_ffree; } } out: RETURN(rc); } void ll_update_inode(struct inode *inode, struct mds_body *body, struct lov_stripe_md *lsm) { struct ll_inode_info *lli = ll_i2info(inode); LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0)); if (lsm != NULL) { if (lli->lli_smd == NULL) { lli->lli_smd = lsm; lli->lli_maxbytes = lsm->lsm_maxbytes; if (lli->lli_maxbytes > PAGE_CACHE_MAXBYTES) lli->lli_maxbytes = PAGE_CACHE_MAXBYTES; } else { LASSERT (!memcmp (lli->lli_smd, lsm, sizeof (*lsm))); } } if (body->valid & OBD_MD_FLID) inode->i_ino = body->ino; if (body->valid & OBD_MD_FLATIME) LTIME_S(inode->i_atime) = body->atime; if (body->valid & OBD_MD_FLMTIME) LTIME_S(inode->i_mtime) = body->mtime; if (body->valid & OBD_MD_FLCTIME) LTIME_S(inode->i_ctime) = body->ctime; if (body->valid & OBD_MD_FLMODE) inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT); if (body->valid & OBD_MD_FLTYPE) inode->i_mode = (inode->i_mode & ~S_IFMT)|(body->mode & S_IFMT); if (body->valid & OBD_MD_FLUID) inode->i_uid = body->uid; if (body->valid & OBD_MD_FLGID) inode->i_gid = body->gid; if (body->valid & OBD_MD_FLFLAGS) inode->i_flags = body->flags; if (body->valid & OBD_MD_FLNLINK) inode->i_nlink = body->nlink; if (body->valid & OBD_MD_FLGENER) inode->i_generation = body->generation; if (body->valid & OBD_MD_FLRDEV) inode->i_rdev = to_kdev_t(body->rdev); if (body->valid & OBD_MD_FLSIZE) inode->i_size = body->size; if (body->valid & OBD_MD_FLBLOCKS) inode->i_blocks = body->blocks; } int ll_read_inode2(struct inode *inode, void *opaque) { struct ll_read_inode2_cookie *lic = opaque; struct mds_body *body = lic->lic_body; struct ll_inode_info *lli = ll_i2info(inode); int rc = 0; ENTRY; CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu\n", inode->i_ino); sema_init(&lli->lli_open_sem, 1); /* these are 2.4 only, but putting them here for consistency.. */ spin_lock_init(&lli->lli_read_extent_lock); INIT_LIST_HEAD(&lli->lli_read_extents); ll_lldo_init(&lli->lli_dirty); lli->lli_flags = 0; lli->lli_maxbytes = LUSTRE_STRIPE_MAXBYTES; LASSERT(!lli->lli_smd); /* core attributes first */ ll_update_inode(inode, body, lic ? lic->lic_lsm : NULL); /* OIDEBUG(inode); */ if (S_ISREG(inode->i_mode)) { inode->i_op = &ll_file_inode_operations; inode->i_fop = &ll_file_operations; inode->i_mapping->a_ops = &ll_aops; EXIT; } else if (S_ISDIR(inode->i_mode)) { inode->i_op = &ll_dir_inode_operations; inode->i_fop = &ll_dir_operations; inode->i_mapping->a_ops = &ll_dir_aops; EXIT; } else if (S_ISLNK(inode->i_mode)) { inode->i_op = &ll_fast_symlink_inode_operations; EXIT; } else { inode->i_op = &ll_special_inode_operations; init_special_inode(inode, inode->i_mode, kdev_t_to_nr(inode->i_rdev)); EXIT; } return rc; } void ll_umount_begin(struct super_block *sb) { struct ll_sb_info *sbi = ll_s2sbi(sb); struct obd_device *obd; struct obd_ioctl_data ioc_data = { 0 }; ENTRY; CDEBUG(D_VFSTRACE, "VFS Op:\n"); obd = class_conn2obd(&sbi->ll_mdc_conn); obd->obd_no_recov = 1; obd_iocontrol(IOC_OSC_SET_ACTIVE, &sbi->ll_mdc_conn, sizeof ioc_data, &ioc_data, NULL); obd = class_conn2obd(&sbi->ll_osc_conn); obd->obd_no_recov = 1; obd_iocontrol(IOC_OSC_SET_ACTIVE, &sbi->ll_osc_conn, sizeof ioc_data, &ioc_data, NULL); /* Really, we'd like to wait until there are no requests outstanding, * and then continue. For now, we just invalidate the requests, * schedule, and hope. */ schedule(); EXIT; } static kmem_cache_t *ll_inode_cachep; static struct inode *ll_alloc_inode(struct super_block *sb) { struct ll_inode_info *lli; OBD_SLAB_ALLOC(lli, ll_inode_cachep, SLAB_KERNEL, sizeof *lli); if (lli == NULL) return NULL; memset(lli, 0, (char *)&lli->lli_vfs_inode - (char *)lli); sema_init(&lli->lli_open_sem, 1); init_MUTEX(&lli->lli_size_valid_sem); lli->lli_maxbytes = LUSTRE_STRIPE_MAXBYTES; return &lli->lli_vfs_inode; } static void ll_destroy_inode(struct inode *inode) { OBD_SLAB_FREE(ll_inode_cachep, ll_i2info(inode), sizeof(struct ll_inode_info)); } static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) { struct ll_inode_info *lli = foo; if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == SLAB_CTOR_CONSTRUCTOR) inode_init_once(&lli->lli_vfs_inode); } int ll_init_inodecache(void) { ll_inode_cachep = kmem_cache_create("lustre_inode_cache", sizeof(struct ll_inode_info), 0, SLAB_HWCACHE_ALIGN, init_once, NULL); if (ll_inode_cachep == NULL) return -ENOMEM; return 0; } void ll_destroy_inodecache(void) { if (kmem_cache_destroy(ll_inode_cachep)) CERROR("ll_inode_cache: not all structures were freed\n"); } /* exported operations */ struct super_operations ll_super_operations = { alloc_inode: ll_alloc_inode, destroy_inode: ll_destroy_inode, clear_inode: ll_clear_inode, // delete_inode: ll_delete_inode, put_super: ll_put_super, statfs: ll_statfs, umount_begin: ll_umount_begin }; struct file_system_type lustre_lite_fs_type = { .owner = THIS_MODULE, .name = "lustre_lite", .get_sb = ll_get_sb, .kill_sb = kill_anon_super, }; static int __init init_lustre_lite(void) { int rc; printk(KERN_INFO "Lustre Lite Client File System; " "info@clusterfs.com\n"); rc = ll_init_inodecache(); if (rc) return -ENOMEM; ll_file_data_slab = kmem_cache_create("ll_file_data", sizeof(struct ll_file_data), 0, SLAB_HWCACHE_ALIGN, NULL, NULL); if (ll_file_data_slab == NULL) { ll_destroy_inodecache(); return -ENOMEM; } proc_lustre_fs_root = proc_lustre_root ? proc_mkdir("llite", proc_lustre_root) : NULL; return register_filesystem(&lustre_lite_fs_type); } static void __exit exit_lustre_lite(void) { unregister_filesystem(&lustre_lite_fs_type); ll_destroy_inodecache(); kmem_cache_destroy(ll_file_data_slab); if (proc_lustre_fs_root) { lprocfs_remove(proc_lustre_fs_root); proc_lustre_fs_root = NULL; } } MODULE_AUTHOR("Cluster File Systems, Inc. "); MODULE_DESCRIPTION("Lustre Lite Client File System"); MODULE_LICENSE("GPL"); module_init(init_lustre_lite); module_exit(exit_lustre_lite); #endif