diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/class_obd.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/obdclass/class_obd.c | 689 |
1 files changed, 689 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/class_obd.c b/drivers/staging/lustre/lustre/obdclass/class_obd.c new file mode 100644 index 000000000000..af1c2d09c47b --- /dev/null +++ b/drivers/staging/lustre/lustre/obdclass/class_obd.c @@ -0,0 +1,689 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * 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 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). + * + * 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 + * + * 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. + * + * GPL HEADER END + */ +/* + * Copyright (c) 1999, 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. + */ + +#define DEBUG_SUBSYSTEM S_CLASS +# include <asm/atomic.h> + +#include <obd_support.h> +#include <obd_class.h> +#include <linux/lnet/lnetctl.h> +#include <lustre_debug.h> +#include <lprocfs_status.h> +#include <lustre/lustre_build_version.h> +#include <linux/list.h> +#include <cl_object.h> +#include "llog_internal.h" + + +struct obd_device *obd_devs[MAX_OBD_DEVICES]; +EXPORT_SYMBOL(obd_devs); +struct list_head obd_types; +DEFINE_RWLOCK(obd_dev_lock); + +__u64 obd_max_pages = 0; +__u64 obd_max_alloc = 0; +DEFINE_SPINLOCK(obd_updatemax_lock); + +/* The following are visible and mutable through /proc/sys/lustre/. */ +unsigned int obd_alloc_fail_rate = 0; +EXPORT_SYMBOL(obd_alloc_fail_rate); +unsigned int obd_debug_peer_on_timeout; +EXPORT_SYMBOL(obd_debug_peer_on_timeout); +unsigned int obd_dump_on_timeout; +EXPORT_SYMBOL(obd_dump_on_timeout); +unsigned int obd_dump_on_eviction; +EXPORT_SYMBOL(obd_dump_on_eviction); +unsigned int obd_max_dirty_pages = 256; +EXPORT_SYMBOL(obd_max_dirty_pages); +atomic_t obd_dirty_pages; +EXPORT_SYMBOL(obd_dirty_pages); +unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT; /* seconds */ +EXPORT_SYMBOL(obd_timeout); +unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */ +EXPORT_SYMBOL(ldlm_timeout); +unsigned int obd_timeout_set; +EXPORT_SYMBOL(obd_timeout_set); +unsigned int ldlm_timeout_set; +EXPORT_SYMBOL(ldlm_timeout_set); +/* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */ +unsigned int at_min = 0; +EXPORT_SYMBOL(at_min); +unsigned int at_max = 600; +EXPORT_SYMBOL(at_max); +unsigned int at_history = 600; +EXPORT_SYMBOL(at_history); +int at_early_margin = 5; +EXPORT_SYMBOL(at_early_margin); +int at_extra = 30; +EXPORT_SYMBOL(at_extra); + +atomic_t obd_dirty_transit_pages; +EXPORT_SYMBOL(obd_dirty_transit_pages); + +char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE; +EXPORT_SYMBOL(obd_jobid_var); + +/* Get jobid of current process by reading the environment variable + * stored in between the "env_start" & "env_end" of task struct. + * + * TODO: + * It's better to cache the jobid for later use if there is any + * efficient way, the cl_env code probably could be reused for this + * purpose. + * + * If some job scheduler doesn't store jobid in the "env_start/end", + * then an upcall could be issued here to get the jobid by utilizing + * the userspace tools/api. Then, the jobid must be cached. + */ +int lustre_get_jobid(char *jobid) +{ + int jobid_len = JOBSTATS_JOBID_SIZE; + int rc = 0; + ENTRY; + + memset(jobid, 0, JOBSTATS_JOBID_SIZE); + /* Jobstats isn't enabled */ + if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0) + RETURN(0); + + /* Use process name + fsuid as jobid */ + if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) { + snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s.%u", + current_comm(), current_fsuid()); + RETURN(0); + } + + rc = cfs_get_environ(obd_jobid_var, jobid, &jobid_len); + if (rc) { + if (rc == -EOVERFLOW) { + /* For the PBS_JOBID and LOADL_STEP_ID keys (which are + * variable length strings instead of just numbers), it + * might make sense to keep the unique parts for JobID, + * instead of just returning an error. That means a + * larger temp buffer for cfs_get_environ(), then + * truncating the string at some separator to fit into + * the specified jobid_len. Fix later if needed. */ + static bool printed; + if (unlikely(!printed)) { + LCONSOLE_ERROR_MSG(0x16b, "%s value too large " + "for JobID buffer (%d)\n", + obd_jobid_var, jobid_len); + printed = true; + } + } else { + CDEBUG((rc == -ENOENT || rc == -EINVAL || + rc == -EDEADLK) ? D_INFO : D_ERROR, + "Get jobid for (%s) failed: rc = %d\n", + obd_jobid_var, rc); + } + } + RETURN(rc); +} +EXPORT_SYMBOL(lustre_get_jobid); + +int obd_alloc_fail(const void *ptr, const char *name, const char *type, + size_t size, const char *file, int line) +{ + if (ptr == NULL || + (cfs_rand() & OBD_ALLOC_FAIL_MASK) < obd_alloc_fail_rate) { + CERROR("%s%salloc of %s ("LPU64" bytes) failed at %s:%d\n", + ptr ? "force " :"", type, name, (__u64)size, file, + line); + CERROR(LPU64" total bytes and "LPU64" total pages " + "("LPU64" bytes) allocated by Lustre, " + "%d total bytes by LNET\n", + obd_memory_sum(), + obd_pages_sum() << PAGE_CACHE_SHIFT, + obd_pages_sum(), + atomic_read(&libcfs_kmemory)); + return 1; + } + return 0; +} +EXPORT_SYMBOL(obd_alloc_fail); + +static inline void obd_data2conn(struct lustre_handle *conn, + struct obd_ioctl_data *data) +{ + memset(conn, 0, sizeof *conn); + conn->cookie = data->ioc_cookie; +} + +static inline void obd_conn2data(struct obd_ioctl_data *data, + struct lustre_handle *conn) +{ + data->ioc_cookie = conn->cookie; +} + +int class_resolve_dev_name(__u32 len, const char *name) +{ + int rc; + int dev; + + ENTRY; + if (!len || !name) { + CERROR("No name passed,!\n"); + GOTO(out, rc = -EINVAL); + } + if (name[len - 1] != 0) { + CERROR("Name not nul terminated!\n"); + GOTO(out, rc = -EINVAL); + } + + CDEBUG(D_IOCTL, "device name %s\n", name); + dev = class_name2dev(name); + if (dev == -1) { + CDEBUG(D_IOCTL, "No device for name %s!\n", name); + GOTO(out, rc = -EINVAL); + } + + CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev); + rc = dev; + +out: + RETURN(rc); +} + +int class_handle_ioctl(unsigned int cmd, unsigned long arg) +{ + char *buf = NULL; + struct obd_ioctl_data *data; + struct libcfs_debug_ioctl_data *debug_data; + struct obd_device *obd = NULL; + int err = 0, len = 0; + ENTRY; + + /* only for debugging */ + if (cmd == LIBCFS_IOC_DEBUG_MASK) { + debug_data = (struct libcfs_debug_ioctl_data*)arg; + libcfs_subsystem_debug = debug_data->subs; + libcfs_debug = debug_data->debug; + return 0; + } + + CDEBUG(D_IOCTL, "cmd = %x\n", cmd); + if (obd_ioctl_getdata(&buf, &len, (void *)arg)) { + CERROR("OBD ioctl: data error\n"); + RETURN(-EINVAL); + } + data = (struct obd_ioctl_data *)buf; + + switch (cmd) { + case OBD_IOC_PROCESS_CFG: { + struct lustre_cfg *lcfg; + + if (!data->ioc_plen1 || !data->ioc_pbuf1) { + CERROR("No config buffer passed!\n"); + GOTO(out, err = -EINVAL); + } + OBD_ALLOC(lcfg, data->ioc_plen1); + if (lcfg == NULL) + GOTO(out, err = -ENOMEM); + err = copy_from_user(lcfg, data->ioc_pbuf1, + data->ioc_plen1); + if (!err) + err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1); + if (!err) + err = class_process_config(lcfg); + + OBD_FREE(lcfg, data->ioc_plen1); + GOTO(out, err); + } + + case OBD_GET_VERSION: + if (!data->ioc_inlbuf1) { + CERROR("No buffer passed in ioctl\n"); + GOTO(out, err = -EINVAL); + } + + if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) { + CERROR("ioctl buffer too small to hold version\n"); + GOTO(out, err = -EINVAL); + } + + memcpy(data->ioc_bulk, BUILD_VERSION, + strlen(BUILD_VERSION) + 1); + + err = obd_ioctl_popdata((void *)arg, data, len); + if (err) + err = -EFAULT; + GOTO(out, err); + + case OBD_IOC_NAME2DEV: { + /* Resolve a device name. This does not change the + * currently selected device. + */ + int dev; + + dev = class_resolve_dev_name(data->ioc_inllen1, + data->ioc_inlbuf1); + data->ioc_dev = dev; + if (dev < 0) + GOTO(out, err = -EINVAL); + + err = obd_ioctl_popdata((void *)arg, data, sizeof(*data)); + if (err) + err = -EFAULT; + GOTO(out, err); + } + + case OBD_IOC_UUID2DEV: { + /* Resolve a device uuid. This does not change the + * currently selected device. + */ + int dev; + struct obd_uuid uuid; + + if (!data->ioc_inllen1 || !data->ioc_inlbuf1) { + CERROR("No UUID passed!\n"); + GOTO(out, err = -EINVAL); + } + if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) { + CERROR("UUID not NUL terminated!\n"); + GOTO(out, err = -EINVAL); + } + + CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1); + obd_str2uuid(&uuid, data->ioc_inlbuf1); + dev = class_uuid2dev(&uuid); + data->ioc_dev = dev; + if (dev == -1) { + CDEBUG(D_IOCTL, "No device for UUID %s!\n", + data->ioc_inlbuf1); + GOTO(out, err = -EINVAL); + } + + CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1, + dev); + err = obd_ioctl_popdata((void *)arg, data, sizeof(*data)); + if (err) + err = -EFAULT; + GOTO(out, err); + } + + case OBD_IOC_CLOSE_UUID: { + CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n", + data->ioc_inlbuf1); + GOTO(out, err = 0); + } + + case OBD_IOC_GETDEVICE: { + int index = data->ioc_count; + char *status, *str; + + if (!data->ioc_inlbuf1) { + CERROR("No buffer passed in ioctl\n"); + GOTO(out, err = -EINVAL); + } + if (data->ioc_inllen1 < 128) { + CERROR("ioctl buffer too small to hold version\n"); + GOTO(out, err = -EINVAL); + } + + obd = class_num2obd(index); + if (!obd) + GOTO(out, err = -ENOENT); + + if (obd->obd_stopping) + status = "ST"; + else if (obd->obd_set_up) + status = "UP"; + else if (obd->obd_attached) + status = "AT"; + else + status = "--"; + str = (char *)data->ioc_bulk; + snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d", + (int)index, status, obd->obd_type->typ_name, + obd->obd_name, obd->obd_uuid.uuid, + atomic_read(&obd->obd_refcount)); + err = obd_ioctl_popdata((void *)arg, data, len); + + GOTO(out, err = 0); + } + + } + + if (data->ioc_dev == OBD_DEV_BY_DEVNAME) { + if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL) + GOTO(out, err = -EINVAL); + if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME) + GOTO(out, err = -EINVAL); + obd = class_name2obd(data->ioc_inlbuf4); + } else if (data->ioc_dev < class_devno_max()) { + obd = class_num2obd(data->ioc_dev); + } else { + CERROR("OBD ioctl: No device\n"); + GOTO(out, err = -EINVAL); + } + + if (obd == NULL) { + CERROR("OBD ioctl : No Device %d\n", data->ioc_dev); + GOTO(out, err = -EINVAL); + } + LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC); + + if (!obd->obd_set_up || obd->obd_stopping) { + CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev); + GOTO(out, err = -EINVAL); + } + + switch(cmd) { + case OBD_IOC_NO_TRANSNO: { + if (!obd->obd_attached) { + CERROR("Device %d not attached\n", obd->obd_minor); + GOTO(out, err = -ENODEV); + } + CDEBUG(D_HA, "%s: disabling committed-transno notification\n", + obd->obd_name); + obd->obd_no_transno = 1; + GOTO(out, err = 0); + } + + default: { + err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL); + if (err) + GOTO(out, err); + + err = obd_ioctl_popdata((void *)arg, data, len); + if (err) + err = -EFAULT; + GOTO(out, err); + } + } + + out: + if (buf) + obd_ioctl_freedata(buf, len); + RETURN(err); +} /* class_handle_ioctl */ + +extern psdev_t obd_psdev; + +#define OBD_INIT_CHECK +int obd_init_checks(void) +{ + __u64 u64val, div64val; + char buf[64]; + int len, ret = 0; + + CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64); + + CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF); + + u64val = OBD_OBJECT_EOF; + CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val); + if (u64val != OBD_OBJECT_EOF) { + CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n", + u64val, (int)sizeof(u64val)); + ret = -EINVAL; + } + len = snprintf(buf, sizeof(buf), LPX64, u64val); + if (len != 18) { + CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len); + ret = -EINVAL; + } + + div64val = OBD_OBJECT_EOF; + CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val); + if (u64val != OBD_OBJECT_EOF) { + CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n", + u64val, (int)sizeof(u64val)); + ret = -EOVERFLOW; + } + if (u64val >> 8 != OBD_OBJECT_EOF >> 8) { + CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n", + u64val, (int)sizeof(u64val)); + return -EOVERFLOW; + } + if (do_div(div64val, 256) != (u64val & 255)) { + CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255); + return -EOVERFLOW; + } + if (u64val >> 8 != div64val) { + CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n", + u64val, div64val, u64val >> 8); + return -EOVERFLOW; + } + len = snprintf(buf, sizeof(buf), LPX64, u64val); + if (len != 18) { + CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len); + ret = -EINVAL; + } + len = snprintf(buf, sizeof(buf), LPU64, u64val); + if (len != 20) { + CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len); + ret = -EINVAL; + } + len = snprintf(buf, sizeof(buf), LPD64, u64val); + if (len != 2) { + CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len); + ret = -EINVAL; + } + if ((u64val & ~CFS_PAGE_MASK) >= PAGE_CACHE_SIZE) { + CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val, + (__u64)PAGE_CACHE_SIZE); + ret = -EINVAL; + } + + return ret; +} + +extern spinlock_t obd_types_lock; +extern int class_procfs_init(void); +extern int class_procfs_clean(void); + +static int __init init_obdclass(void) +{ + int i, err; + int lustre_register_fs(void); + + for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++) + INIT_LIST_HEAD(&capa_list[i]); + + LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n"); + + spin_lock_init(&obd_types_lock); + obd_zombie_impexp_init(); +#ifdef LPROCFS + obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM, + LPROCFS_STATS_FLAG_NONE | + LPROCFS_STATS_FLAG_IRQ_SAFE); + if (obd_memory == NULL) { + CERROR("kmalloc of 'obd_memory' failed\n"); + RETURN(-ENOMEM); + } + + lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT, + LPROCFS_CNTR_AVGMINMAX, + "memused", "bytes"); + lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT, + LPROCFS_CNTR_AVGMINMAX, + "pagesused", "pages"); +#endif + err = obd_init_checks(); + if (err == -EOVERFLOW) + return err; + + class_init_uuidlist(); + err = class_handle_init(); + if (err) + return err; + + INIT_LIST_HEAD(&obd_types); + + err = misc_register(&obd_psdev); + if (err) { + CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err); + return err; + } + + /* This struct is already zeroed for us (static global) */ + for (i = 0; i < class_devno_max(); i++) + obd_devs[i] = NULL; + + /* Default the dirty page cache cap to 1/2 of system memory. + * For clients with less memory, a larger fraction is needed + * for other purposes (mostly for BGL). */ + if (num_physpages <= 512 << (20 - PAGE_CACHE_SHIFT)) + obd_max_dirty_pages = num_physpages / 4; + else + obd_max_dirty_pages = num_physpages / 2; + + err = obd_init_caches(); + if (err) + return err; + err = class_procfs_init(); + if (err) + return err; + + err = lu_global_init(); + if (err) + return err; + + err = cl_global_init(); + if (err != 0) + return err; + + + err = llog_info_init(); + if (err) + return err; + + err = lustre_register_fs(); + + return err; +} + +void obd_update_maxusage(void) +{ + __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); + +#ifdef LPROCFS +__u64 obd_memory_max(void) +{ + __u64 ret; + + spin_lock(&obd_updatemax_lock); + ret = obd_max_alloc; + spin_unlock(&obd_updatemax_lock); + + return ret; +} +EXPORT_SYMBOL(obd_memory_max); + +__u64 obd_pages_max(void) +{ + __u64 ret; + + spin_lock(&obd_updatemax_lock); + ret = obd_max_pages; + spin_unlock(&obd_updatemax_lock); + + return ret; +} +EXPORT_SYMBOL(obd_pages_max); +#endif + +/* liblustre doesn't call cleanup_obdclass, apparently. we carry on in this + * ifdef to the end of the file to cover module and versioning goo.*/ +static void cleanup_obdclass(void) +{ + int i; + int lustre_unregister_fs(void); + __u64 memory_leaked, pages_leaked; + __u64 memory_max, pages_max; + ENTRY; + + lustre_unregister_fs(); + + misc_deregister(&obd_psdev); + for (i = 0; i < class_devno_max(); i++) { + struct obd_device *obd = class_num2obd(i); + if (obd && obd->obd_set_up && + OBT(obd) && OBP(obd, detach)) { + /* XXX should this call generic detach otherwise? */ + LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC); + OBP(obd, detach)(obd); + } + } + llog_info_fini(); + cl_global_fini(); + lu_global_fini(); + + obd_cleanup_caches(); + obd_sysctl_clean(); + + class_procfs_clean(); + + class_handle_cleanup(); + class_exit_uuidlist(); + obd_zombie_impexp_stop(); + + memory_leaked = obd_memory_sum(); + pages_leaked = obd_pages_sum(); + + memory_max = obd_memory_max(); + pages_max = obd_pages_max(); + + lprocfs_free_stats(&obd_memory); + CDEBUG((memory_leaked) ? D_ERROR : D_INFO, + "obd_memory max: "LPU64", leaked: "LPU64"\n", + memory_max, memory_leaked); + CDEBUG((pages_leaked) ? D_ERROR : D_INFO, + "obd_memory_pages max: "LPU64", leaked: "LPU64"\n", + pages_max, pages_leaked); + + EXIT; +} + +MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>"); +MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION); +MODULE_LICENSE("GPL"); + +cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass); |