X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Flvfs%2Flvfs_linux.c;h=eef01f4cb054d84b0995d3f8bf309ad884ac9fb0;hb=f5ecf580adc319fd9abe41bd79389b50015d5c13;hp=21cd56a08da9b9cc8ea417ff14a6a824ccb2c202;hpb=866e8e86d61a1531c28b660802669580dd039dba;p=fs%2Flustre-release.git diff --git a/lustre/lvfs/lvfs_linux.c b/lustre/lvfs/lvfs_linux.c index 21cd56a..eef01f4 100644 --- a/lustre/lvfs/lvfs_linux.c +++ b/lustre/lvfs/lvfs_linux.c @@ -1,31 +1,42 @@ -/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- - * vim:expandtab:shiftwidth=8:tabstop=8: +/* + * GPL HEADER START * - * lustre/lib/lvfs_linux.c - * Lustre filesystem abstraction routines + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * - * Copyright (C) 2002, 2003 Cluster File Systems, Inc. - * Author: Andreas Dilger + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. * - * This file is part of Lustre, http://www.lustre.org. + * This program 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 version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). * - * 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. + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf * - * 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. + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. * - * 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. + * GPL HEADER END + */ +/* + * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2011, 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * lustre/lvfs/lvfs_linux.c + * + * Author: Andreas Dilger */ - -#ifndef EXPORT_SYMTAB -# define EXPORT_SYMTAB -#endif #define DEBUG_SUBSYSTEM S_FILTER @@ -36,10 +47,9 @@ #include #include #include -#include +#include #include #include -#include #include #include #include @@ -48,10 +58,13 @@ #include #include -#include -atomic_t obd_memory; -int obd_memmax; +__u64 obd_max_pages = 0; +__u64 obd_max_alloc = 0; +struct lprocfs_stats *obd_memory = NULL; +EXPORT_SYMBOL(obd_memory); +DEFINE_SPINLOCK(obd_updatemax_lock); +/* refine later and change to seqlock or simlar from libcfs */ /* Debugging check only needed during development */ #ifdef OBD_CTXT_DEBUG @@ -66,54 +79,36 @@ int obd_memmax; #endif static void push_group_info(struct lvfs_run_ctxt *save, - struct upcall_cache_entry *uce) + struct group_info *ginfo) { - struct group_info *ginfo = uce ? uce->ue_group_info : NULL; - if (!ginfo) { save->ngroups = current_ngroups; current_ngroups = 0; } else { -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4) + struct cred *cred; task_lock(current); - save->group_info = current->group_info; - current->group_info = ginfo; + save->group_info = current_cred()->group_info; + if ((cred = prepare_creds())) { + cred->group_info = ginfo; + commit_creds(cred); + } task_unlock(current); -#else - LASSERT(ginfo->ngroups <= NGROUPS); - LASSERT(current->ngroups <= NGROUPS_SMALL); - /* save old */ - save->group_info.ngroups = current->ngroups; - if (current->ngroups) - memcpy(save->group_info.small_block, current->groups, - current->ngroups * sizeof(gid_t)); - /* push new */ - current->ngroups = ginfo->ngroups; - if (ginfo->ngroups) - memcpy(current->groups, ginfo->small_block, - current->ngroups * sizeof(gid_t)); -#endif } } static void pop_group_info(struct lvfs_run_ctxt *save, - struct upcall_cache_entry *uce) + struct group_info *ginfo) { - struct group_info *ginfo = uce ? uce->ue_group_info : NULL; - if (!ginfo) { current_ngroups = save->ngroups; } else { -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,4) + struct cred *cred; task_lock(current); - current->group_info = save->group_info; + if ((cred = prepare_creds())) { + cred->group_info = save->group_info; + commit_creds(cred); + } task_unlock(current); -#else - current->ngroups = save->group_info.ngroups; - if (current->ngroups) - memcpy(current->groups, save->group_info.small_block, - current->ngroups * sizeof(gid_t)); -#endif } } @@ -121,27 +116,21 @@ static void pop_group_info(struct lvfs_run_ctxt *save, void push_ctxt(struct lvfs_run_ctxt *save, struct lvfs_run_ctxt *new_ctx, struct lvfs_ucred *uc) { + /* if there is underlaying dt_device then push_ctxt is not needed */ + if (new_ctx->dt != NULL) + return; + //ASSERT_NOT_KERNEL_CTXT("already in kernel context!\n"); ASSERT_CTXT_MAGIC(new_ctx->magic); OBD_SET_CTXT_MAGIC(save); - /* - CDEBUG(D_INFO, - "= push %p->%p = cur fs %p pwd %p:d%d:i%d (%.*s), pwdmnt %p:%d\n", - save, current, current->fs, current->fs->pwd, - atomic_read(¤t->fs->pwd->d_count), - atomic_read(¤t->fs->pwd->d_inode->i_count), - current->fs->pwd->d_name.len, current->fs->pwd->d_name.name, - current->fs->pwdmnt, - atomic_read(¤t->fs->pwdmnt->mnt_count)); - */ - save->fs = get_fs(); - LASSERT(atomic_read(¤t->fs->pwd->d_count)); - LASSERT(atomic_read(&new_ctx->pwd->d_count)); - save->pwd = dget(current->fs->pwd); - save->pwdmnt = mntget(current->fs->pwdmnt); - save->luc.luc_umask = current->fs->umask; + LASSERT(d_refcount(cfs_fs_pwd(current->fs))); + LASSERT(d_refcount(new_ctx->pwd)); + save->pwd = dget(cfs_fs_pwd(current->fs)); + save->pwdmnt = mntget(cfs_fs_mnt(current->fs)); + save->luc.luc_umask = cfs_curproc_umask(); + save->ngroups = current_cred()->group_info->ngroups; LASSERT(save->pwd); LASSERT(save->pwdmnt); @@ -149,55 +138,47 @@ void push_ctxt(struct lvfs_run_ctxt *save, struct lvfs_run_ctxt *new_ctx, LASSERT(new_ctx->pwdmnt); if (uc) { - save->luc.luc_fsuid = current->fsuid; - save->luc.luc_fsgid = current->fsgid; - save->luc.luc_cap = current->cap_effective; - - current->fsuid = uc->luc_fsuid; - current->fsgid = uc->luc_fsgid; - current->cap_effective = uc->luc_cap; - push_group_info(save, uc->luc_uce); + struct cred *cred; + save->luc.luc_uid = current_uid(); + save->luc.luc_gid = current_gid(); + save->luc.luc_fsuid = current_fsuid(); + save->luc.luc_fsgid = current_fsgid(); + save->luc.luc_cap = current_cap(); + + if ((cred = prepare_creds())) { + cred->uid = uc->luc_uid; + cred->gid = uc->luc_gid; + cred->fsuid = uc->luc_fsuid; + cred->fsgid = uc->luc_fsgid; + cred->cap_effective = uc->luc_cap; + commit_creds(cred); + } + + push_group_info(save, + uc->luc_ginfo ?: + uc->luc_identity ? uc->luc_identity->mi_ginfo : + NULL); } current->fs->umask = 0; /* umask already applied on client */ set_fs(new_ctx->fs); ll_set_fs_pwd(current->fs, new_ctx->pwdmnt, new_ctx->pwd); - - /* - CDEBUG(D_INFO, - "= push %p->%p = cur fs %p pwd %p:d%d:i%d (%.*s), pwdmnt %p:%d\n", - new_ctx, current, current->fs, current->fs->pwd, - atomic_read(¤t->fs->pwd->d_count), - atomic_read(¤t->fs->pwd->d_inode->i_count), - current->fs->pwd->d_name.len, current->fs->pwd->d_name.name, - current->fs->pwdmnt, - atomic_read(¤t->fs->pwdmnt->mnt_count)); - */ } EXPORT_SYMBOL(push_ctxt); void pop_ctxt(struct lvfs_run_ctxt *saved, struct lvfs_run_ctxt *new_ctx, struct lvfs_ucred *uc) { - //printk("pc0"); + /* if there is underlaying dt_device then pop_ctxt is not needed */ + if (new_ctx->dt != NULL) + return; + ASSERT_CTXT_MAGIC(saved->magic); - //printk("pc1"); ASSERT_KERNEL_CTXT("popping non-kernel context!\n"); - /* - CDEBUG(D_INFO, - " = pop %p==%p = cur %p pwd %p:d%d:i%d (%.*s), pwdmnt %p:%d\n", - new_ctx, current, current->fs, current->fs->pwd, - atomic_read(¤t->fs->pwd->d_count), - atomic_read(¤t->fs->pwd->d_inode->i_count), - current->fs->pwd->d_name.len, current->fs->pwd->d_name.name, - current->fs->pwdmnt, - atomic_read(¤t->fs->pwdmnt->mnt_count)); - */ - - LASSERTF(current->fs->pwd == new_ctx->pwd, "%p != %p\n", - current->fs->pwd, new_ctx->pwd); - LASSERTF(current->fs->pwdmnt == new_ctx->pwdmnt, "%p != %p\n", - current->fs->pwdmnt, new_ctx->pwdmnt); + LASSERTF(cfs_fs_pwd(current->fs) == new_ctx->pwd, "%p != %p\n", + cfs_fs_pwd(current->fs), new_ctx->pwd); + LASSERTF(cfs_fs_mnt(current->fs) == new_ctx->pwdmnt, "%p != %p\n", + cfs_fs_mnt(current->fs), new_ctx->pwdmnt); set_fs(saved->fs); ll_set_fs_pwd(current->fs, saved->pwdmnt, saved->pwd); @@ -206,22 +187,21 @@ void pop_ctxt(struct lvfs_run_ctxt *saved, struct lvfs_run_ctxt *new_ctx, mntput(saved->pwdmnt); current->fs->umask = saved->luc.luc_umask; if (uc) { - current->fsuid = saved->luc.luc_fsuid; - current->fsgid = saved->luc.luc_fsgid; - current->cap_effective = saved->luc.luc_cap; - pop_group_info(saved, uc->luc_uce); - } + struct cred *cred; + if ((cred = prepare_creds())) { + cred->uid = saved->luc.luc_uid; + cred->gid = saved->luc.luc_gid; + cred->fsuid = saved->luc.luc_fsuid; + cred->fsgid = saved->luc.luc_fsgid; + cred->cap_effective = saved->luc.luc_cap; + commit_creds(cred); + } - /* - CDEBUG(D_INFO, - "= pop %p->%p = cur fs %p pwd %p:d%d:i%d (%.*s), pwdmnt %p:%d\n", - saved, current, current->fs, current->fs->pwd, - atomic_read(¤t->fs->pwd->d_count), - atomic_read(¤t->fs->pwd->d_inode->i_count), - current->fs->pwd->d_name.len, current->fs->pwd->d_name.name, - current->fs->pwdmnt, - atomic_read(¤t->fs->pwdmnt->mnt_count)); - */ + pop_group_info(saved, + uc->luc_ginfo ?: + uc->luc_identity ? uc->luc_identity->mi_ginfo : + NULL); + } } EXPORT_SYMBOL(pop_ctxt); @@ -232,7 +212,7 @@ struct dentry *simple_mknod(struct dentry *dir, char *name, int mode, int fix) int err = 0; ENTRY; - ASSERT_KERNEL_CTXT("kernel doing mknod outside kernel context\n"); + // ASSERT_KERNEL_CTXT("kernel doing mknod outside kernel context\n"); CDEBUG(D_INODE, "creating file %.*s\n", (int)strlen(name), name); dchild = ll_lookup_one_len(name, dir, strlen(name)); @@ -255,10 +235,10 @@ struct dentry *simple_mknod(struct dentry *dir, char *name, int mode, int fix) GOTO(out_up, dchild); } - err = ll_vfs_create(dir->d_inode, dchild, (mode & ~S_IFMT) | S_IFREG, - NULL); - if (err) - GOTO(out_err, err); + err = vfs_create(dir->d_inode, dchild, (mode & ~S_IFMT) | S_IFREG, + NULL); + if (err) + GOTO(out_err, err); RETURN(dchild); @@ -271,13 +251,14 @@ out_up: EXPORT_SYMBOL(simple_mknod); /* utility to make a directory */ -struct dentry *simple_mkdir(struct dentry *dir, char *name, int mode, int fix) +struct dentry *simple_mkdir(struct dentry *dir, struct vfsmount *mnt, + const char *name, int mode, int fix) { struct dentry *dchild; int err = 0; ENTRY; - ASSERT_KERNEL_CTXT("kernel doing mkdir outside kernel context\n"); + // ASSERT_KERNEL_CTXT("kernel doing mkdir outside kernel context\n"); CDEBUG(D_INODE, "creating directory %.*s\n", (int)strlen(name), name); dchild = ll_lookup_one_len(name, dir, strlen(name)); if (IS_ERR(dchild)) @@ -294,7 +275,7 @@ struct dentry *simple_mkdir(struct dentry *dir, char *name, int mode, int fix) /* Fixup directory permissions if necessary */ if (fix && (old_mode & S_IALLUGO) != (mode & S_IALLUGO)) { - CDEBUG(D_CONFIG, + CDEBUG(D_CONFIG, "fixing permissions on %s from %o to %o\n", name, old_mode, mode); dchild->d_inode->i_mode = (mode & S_IALLUGO) | @@ -304,7 +285,7 @@ struct dentry *simple_mkdir(struct dentry *dir, char *name, int mode, int fix) GOTO(out_up, dchild); } - err = vfs_mkdir(dir->d_inode, dchild, mode); + err = ll_vfs_mkdir(dir->d_inode, dchild, mnt, mode); if (err) GOTO(out_err, err); @@ -318,6 +299,39 @@ out_up: } EXPORT_SYMBOL(simple_mkdir); +/* utility to rename a file */ +int lustre_rename(struct dentry *dir, struct vfsmount *mnt, + char *oldname, char *newname) +{ + struct dentry *dchild_old, *dchild_new; + int err = 0; + ENTRY; + + ASSERT_KERNEL_CTXT("kernel doing rename outside kernel context\n"); + CDEBUG(D_INODE, "renaming file %.*s to %.*s\n", + (int)strlen(oldname), oldname, (int)strlen(newname), newname); + + dchild_old = ll_lookup_one_len(oldname, dir, strlen(oldname)); + if (IS_ERR(dchild_old)) + RETURN(PTR_ERR(dchild_old)); + + if (!dchild_old->d_inode) + GOTO(put_old, err = -ENOENT); + + dchild_new = ll_lookup_one_len(newname, dir, strlen(newname)); + if (IS_ERR(dchild_new)) + GOTO(put_old, err = PTR_ERR(dchild_new)); + + err = ll_vfs_rename(dir->d_inode, dchild_old, mnt, + dir->d_inode, dchild_new, mnt); + + dput(dchild_new); +put_old: + dput(dchild_old); + RETURN(err); +} +EXPORT_SYMBOL(lustre_rename); + /* * Read a file from within kernel context. Prior to calling this * function we should already have done a push_ctxt(). @@ -365,25 +379,21 @@ int lustre_fsync(struct file *file) if (!file || !file->f_op || !file->f_op->fsync) RETURN(-ENOSYS); - RETURN(file->f_op->fsync(file, file->f_dentry, 0)); + RETURN(cfs_do_fsync(file, 0)); } EXPORT_SYMBOL(lustre_fsync); +/* Note: dput(dchild) will be called if there is an error */ struct l_file *l_dentry_open(struct lvfs_run_ctxt *ctxt, struct l_dentry *de, int flags) { mntget(ctxt->pwdmnt); - return dentry_open(de, ctxt->pwdmnt, flags); + return ll_dentry_open(de, ctxt->pwdmnt, flags, current_cred()); } EXPORT_SYMBOL(l_dentry_open); -#ifdef HAVE_VFS_READDIR_U64_INO static int l_filldir(void *__buf, const char *name, int namlen, loff_t offset, u64 ino, unsigned int d_type) -#else -static int l_filldir(void *__buf, const char *name, int namlen, loff_t offset, - ino_t ino, unsigned int d_type) -#endif { struct l_linux_dirent *dirent; struct l_readdir_callback *buf = (struct l_readdir_callback *)__buf; @@ -397,7 +407,7 @@ static int l_filldir(void *__buf, const char *name, int namlen, loff_t offset, if (!dirent) return -ENOMEM; - list_add_tail(&dirent->lld_list, buf->lrc_list); + cfs_list_add_tail(&dirent->lld_list, buf->lrc_list); buf->lrc_dirent = dirent; dirent->lld_ino = ino; @@ -407,14 +417,14 @@ static int l_filldir(void *__buf, const char *name, int namlen, loff_t offset, return 0; } -long l_readdir(struct file *file, struct list_head *dentry_list) +long l_readdir(struct file *file, cfs_list_t *dentry_list) { struct l_linux_dirent *lastdirent; struct l_readdir_callback buf; int error; buf.lrc_dirent = NULL; - buf.lrc_list = dentry_list; + buf.lrc_list = dentry_list; error = vfs_readdir(file, l_filldir, &buf); if (error < 0) @@ -424,44 +434,91 @@ long l_readdir(struct file *file, struct list_head *dentry_list) if (lastdirent) lastdirent->lld_off = file->f_pos; - return 0; + return 0; } EXPORT_SYMBOL(l_readdir); -EXPORT_SYMBOL(obd_memory); -EXPORT_SYMBOL(obd_memmax); -#ifdef LUSTRE_KERNEL_VERSION +int l_notify_change(struct vfsmount *mnt, struct dentry *dchild, + struct iattr *newattrs) +{ + int rc; -#ifndef HAVE_CLEAR_RDONLY_ON_PUT -#error rdonly patchset must be updated + mutex_lock(&dchild->d_inode->i_mutex); +#ifdef HAVE_SECURITY_PLUG + rc = notify_change(dchild, mnt, newattrs); +#else + rc = notify_change(dchild, newattrs); #endif + mutex_unlock(&dchild->d_inode->i_mutex); + return rc; +} +EXPORT_SYMBOL(l_notify_change); -void dev_set_rdonly(lvfs_sbdev_type dev); -void dev_clear_rdonly(lvfs_sbdev_type dev); -int dev_check_rdonly(lvfs_sbdev_type dev); +/* utility to truncate a file */ +int simple_truncate(struct dentry *dir, struct vfsmount *mnt, + char *name, loff_t length) +{ + struct dentry *dchild; + struct iattr newattrs; + int err = 0; + ENTRY; + + CDEBUG(D_INODE, "truncating file %.*s to %lld\n", (int)strlen(name), + name, (long long)length); + dchild = ll_lookup_one_len(name, dir, strlen(name)); + if (IS_ERR(dchild)) + GOTO(out, err = PTR_ERR(dchild)); -void lvfs_set_rdonly(lvfs_sbdev_type dev) + if (dchild->d_inode) { + int old_mode = dchild->d_inode->i_mode; + if (S_ISDIR(old_mode)) { + CERROR("found %s (%lu/%u) is mode %o\n", name, + dchild->d_inode->i_ino, + dchild->d_inode->i_generation, old_mode); + GOTO(out_dput, err = -EISDIR); + } + + newattrs.ia_size = length; + newattrs.ia_valid = ATTR_SIZE; + err = l_notify_change(mnt, dchild, &newattrs); + } + EXIT; +out_dput: + dput(dchild); +out: + return err; +} +EXPORT_SYMBOL(simple_truncate); + +int __lvfs_set_rdonly(lvfs_sbdev_type dev, lvfs_sbdev_type jdev) { +#ifdef HAVE_DEV_SET_RDONLY + if (jdev && (jdev != dev)) { + CDEBUG(D_IOCTL | D_HA, "set journal dev %lx rdonly\n", + (long)jdev); + dev_set_rdonly(jdev); + } CDEBUG(D_IOCTL | D_HA, "set dev %lx rdonly\n", (long)dev); - lvfs_sbdev_sync(dev); dev_set_rdonly(dev); + + return 0; +#else + CERROR("DEV %lx CANNOT BE SET READONLY\n", (long)dev); + + return -EOPNOTSUPP; +#endif } +EXPORT_SYMBOL(__lvfs_set_rdonly); int lvfs_check_rdonly(lvfs_sbdev_type dev) { +#ifdef HAVE_DEV_SET_RDONLY return dev_check_rdonly(dev); +#else + return 0; +#endif } - -void lvfs_clear_rdonly(lvfs_sbdev_type dev) -{ - CDEBUG(D_IOCTL | D_HA, "(will unset dev %lx rdonly on put)\n", - (long)dev); -} - -EXPORT_SYMBOL(lvfs_set_rdonly); EXPORT_SYMBOL(lvfs_check_rdonly); -EXPORT_SYMBOL(lvfs_clear_rdonly); -#endif int lvfs_check_io_health(struct obd_device *obd, struct file *file) { @@ -473,37 +530,97 @@ int lvfs_check_io_health(struct obd_device *obd, struct file *file) OBD_ALLOC(write_page, CFS_PAGE_SIZE); if (!write_page) RETURN(-ENOMEM); - + rc = fsfilt_write_record(obd, file, write_page, CFS_PAGE_SIZE, &offset, 1); - + OBD_FREE(write_page, CFS_PAGE_SIZE); CDEBUG(D_INFO, "write 1 page synchronously for checking io rc %d\n",rc); - RETURN(rc); + RETURN(rc); } EXPORT_SYMBOL(lvfs_check_io_health); -static int __init lvfs_linux_init(void) +void obd_update_maxusage() +{ + __u64 max1, max2; + + max1 = obd_pages_sum(); + max2 = obd_memory_sum(); + + spin_lock(&obd_updatemax_lock); + if (max1 > obd_max_pages) + obd_max_pages = max1; + if (max2 > obd_max_alloc) + obd_max_alloc = max2; + spin_unlock(&obd_updatemax_lock); + +} +EXPORT_SYMBOL(obd_update_maxusage); + +__u64 obd_memory_max(void) { - RETURN(0); + __u64 ret; + + spin_lock(&obd_updatemax_lock); + ret = obd_max_alloc; + spin_unlock(&obd_updatemax_lock); + + return ret; } +EXPORT_SYMBOL(obd_memory_max); -static void __exit lvfs_linux_exit(void) +__u64 obd_pages_max(void) { - int leaked; - ENTRY; + __u64 ret; - leaked = atomic_read(&obd_memory); - CDEBUG(leaked ? D_ERROR : D_INFO, - "obd mem max: %d leaked: %d\n", obd_memmax, leaked); + spin_lock(&obd_updatemax_lock); + ret = obd_max_pages; + spin_unlock(&obd_updatemax_lock); - EXIT; - return; + return ret; +} +EXPORT_SYMBOL(obd_pages_max); + +#ifdef LPROCFS +__s64 lprocfs_read_helper(struct lprocfs_counter *lc, + enum lprocfs_fields_flags field) +{ + __s64 ret = 0; + + if (lc == NULL) + RETURN(0); + + switch (field) { + case LPROCFS_FIELDS_FLAGS_CONFIG: + ret = lc->lc_config; + break; + case LPROCFS_FIELDS_FLAGS_SUM: + ret = lc->lc_sum + lc->lc_sum_irq; + break; + case LPROCFS_FIELDS_FLAGS_MIN: + ret = lc->lc_min; + break; + case LPROCFS_FIELDS_FLAGS_MAX: + ret = lc->lc_max; + break; + case LPROCFS_FIELDS_FLAGS_AVG: + ret = (lc->lc_max - lc->lc_min) / 2; + break; + case LPROCFS_FIELDS_FLAGS_SUMSQUARE: + ret = lc->lc_sumsquare; + break; + case LPROCFS_FIELDS_FLAGS_COUNT: + ret = lc->lc_count; + break; + default: + break; + }; + + RETURN(ret); } +EXPORT_SYMBOL(lprocfs_read_helper); +#endif /* LPROCFS */ -MODULE_AUTHOR("Cluster File Systems, Inc. "); +MODULE_AUTHOR("Sun Microsystems, Inc. "); MODULE_DESCRIPTION("Lustre VFS Filesystem Helper v0.1"); MODULE_LICENSE("GPL"); - -module_init(lvfs_linux_init); -module_exit(lvfs_linux_exit);