diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/lmv/lproc_lmv.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/lmv/lproc_lmv.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/lmv/lproc_lmv.c b/drivers/staging/lustre/lustre/lmv/lproc_lmv.c new file mode 100644 index 000000000000..d1c45b583cbb --- /dev/null +++ b/drivers/staging/lustre/lustre/lmv/lproc_lmv.c @@ -0,0 +1,235 @@ +/* + * 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) 2004, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 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 <linux/version.h> +#include <linux/seq_file.h> +#include <asm/statfs.h> +#include <lprocfs_status.h> +#include <obd_class.h> + +#ifndef LPROCFS +static struct lprocfs_vars lprocfs_module_vars[] = { {0} }; +static struct lprocfs_vars lprocfs_obd_vars[] = { {0} }; +#else +static int lmv_numobd_seq_show(struct seq_file *m, void *v) +{ + struct obd_device *dev = (struct obd_device *)m->private; + struct lmv_desc *desc; + + LASSERT(dev != NULL); + desc = &dev->u.lmv.desc; + return seq_printf(m, "%u\n", desc->ld_tgt_count); +} +LPROC_SEQ_FOPS_RO(lmv_numobd); + +static const char *placement_name[] = { + [PLACEMENT_CHAR_POLICY] = "CHAR", + [PLACEMENT_NID_POLICY] = "NID", + [PLACEMENT_INVAL_POLICY] = "INVAL" +}; + +static placement_policy_t placement_name2policy(char *name, int len) +{ + int i; + + for (i = 0; i < PLACEMENT_MAX_POLICY; i++) { + if (!strncmp(placement_name[i], name, len)) + return i; + } + return PLACEMENT_INVAL_POLICY; +} + +static const char *placement_policy2name(placement_policy_t placement) +{ + LASSERT(placement < PLACEMENT_MAX_POLICY); + return placement_name[placement]; +} + +static int lmv_placement_seq_show(struct seq_file *m, void *v) +{ + struct obd_device *dev = (struct obd_device *)m->private; + struct lmv_obd *lmv; + + LASSERT(dev != NULL); + lmv = &dev->u.lmv; + return seq_printf(m, "%s\n", placement_policy2name(lmv->lmv_placement)); +} + +#define MAX_POLICY_STRING_SIZE 64 + +static ssize_t lmv_placement_seq_write(struct file *file, const char *buffer, + size_t count, loff_t *off) +{ + struct obd_device *dev = ((struct seq_file *)file->private_data)->private; + char dummy[MAX_POLICY_STRING_SIZE + 1]; + int len = count; + placement_policy_t policy; + struct lmv_obd *lmv; + + if (copy_from_user(dummy, buffer, MAX_POLICY_STRING_SIZE)) + return -EFAULT; + + LASSERT(dev != NULL); + lmv = &dev->u.lmv; + + if (len > MAX_POLICY_STRING_SIZE) + len = MAX_POLICY_STRING_SIZE; + + if (dummy[len - 1] == '\n') + len--; + dummy[len] = '\0'; + + policy = placement_name2policy(dummy, len); + if (policy != PLACEMENT_INVAL_POLICY) { + spin_lock(&lmv->lmv_lock); + lmv->lmv_placement = policy; + spin_unlock(&lmv->lmv_lock); + } else { + CERROR("Invalid placement policy \"%s\"!\n", dummy); + return -EINVAL; + } + return count; +} +LPROC_SEQ_FOPS(lmv_placement); + +static int lmv_activeobd_seq_show(struct seq_file *m, void *v) +{ + struct obd_device *dev = (struct obd_device *)m->private; + struct lmv_desc *desc; + + LASSERT(dev != NULL); + desc = &dev->u.lmv.desc; + return seq_printf(m, "%u\n", desc->ld_active_tgt_count); +} +LPROC_SEQ_FOPS_RO(lmv_activeobd); + +static int lmv_desc_uuid_seq_show(struct seq_file *m, void *v) +{ + struct obd_device *dev = (struct obd_device *)m->private; + struct lmv_obd *lmv; + + LASSERT(dev != NULL); + lmv = &dev->u.lmv; + return seq_printf(m, "%s\n", lmv->desc.ld_uuid.uuid); +} +LPROC_SEQ_FOPS_RO(lmv_desc_uuid); + +static void *lmv_tgt_seq_start(struct seq_file *p, loff_t *pos) +{ + struct obd_device *dev = p->private; + struct lmv_obd *lmv = &dev->u.lmv; + return (*pos >= lmv->desc.ld_tgt_count) ? NULL : lmv->tgts[*pos]; +} + +static void lmv_tgt_seq_stop(struct seq_file *p, void *v) +{ + return; +} + +static void *lmv_tgt_seq_next(struct seq_file *p, void *v, loff_t *pos) +{ + struct obd_device *dev = p->private; + struct lmv_obd *lmv = &dev->u.lmv; + ++*pos; + return (*pos >= lmv->desc.ld_tgt_count) ? NULL : lmv->tgts[*pos]; +} + +static int lmv_tgt_seq_show(struct seq_file *p, void *v) +{ + struct lmv_tgt_desc *tgt = v; + + if (tgt == NULL) + return 0; + return seq_printf(p, "%d: %s %sACTIVE\n", tgt->ltd_idx, + tgt->ltd_uuid.uuid, tgt->ltd_active ? "" : "IN"); +} + +struct seq_operations lmv_tgt_sops = { + .start = lmv_tgt_seq_start, + .stop = lmv_tgt_seq_stop, + .next = lmv_tgt_seq_next, + .show = lmv_tgt_seq_show, +}; + +static int lmv_target_seq_open(struct inode *inode, struct file *file) +{ + struct seq_file *seq; + int rc; + + rc = seq_open(file, &lmv_tgt_sops); + if (rc) + return rc; + + seq = file->private_data; + seq->private = PDE_DATA(inode); + + return 0; +} + +LPROC_SEQ_FOPS_RO_TYPE(lmv, uuid); + +struct lprocfs_vars lprocfs_lmv_obd_vars[] = { + { "numobd", &lmv_numobd_fops, 0, 0 }, + { "placement", &lmv_placement_fops, 0, 0 }, + { "activeobd", &lmv_activeobd_fops, 0, 0 }, + { "uuid", &lmv_uuid_fops, 0, 0 }, + { "desc_uuid", &lmv_desc_uuid_fops, 0, 0 }, + { 0 } +}; + +LPROC_SEQ_FOPS_RO_TYPE(lmv, numrefs); + +static struct lprocfs_vars lprocfs_lmv_module_vars[] = { + { "num_refs", &lmv_numrefs_fops, 0, 0 }, + { 0 } +}; + +struct file_operations lmv_proc_target_fops = { + .owner = THIS_MODULE, + .open = lmv_target_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +#endif /* LPROCFS */ +void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars) +{ + lvars->module_vars = lprocfs_lmv_module_vars; + lvars->obd_vars = lprocfs_lmv_obd_vars; +} |