diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/fid/lproc_fid.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/fid/lproc_fid.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/fid/lproc_fid.c b/drivers/staging/lustre/lustre/fid/lproc_fid.c new file mode 100644 index 000000000..783939dbd --- /dev/null +++ b/drivers/staging/lustre/lustre/fid/lproc_fid.c @@ -0,0 +1,225 @@ +/* + * 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) 2007, 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/fid/lproc_fid.c + * + * Lustre Sequence Manager + * + * Author: Yury Umanets <umka@clusterfs.com> + */ + +#define DEBUG_SUBSYSTEM S_FID + +#include "../../include/linux/libcfs/libcfs.h" +#include <linux/module.h> + +#include "../include/obd.h" +#include "../include/obd_class.h" +#include "../include/dt_object.h" +#include "../include/obd_support.h" +#include "../include/lustre_req_layout.h" +#include "../include/lustre_fid.h" +#include "fid_internal.h" + +/* Format: [0x64BIT_INT - 0x64BIT_INT] + 32 bytes just in case */ +#define MAX_FID_RANGE_STRLEN (32 + 2 * 2 * sizeof(__u64)) +/* + * Note: this function is only used for testing, it is no safe for production + * use. + */ +static int lprocfs_fid_write_common(const char __user *buffer, size_t count, + struct lu_seq_range *range) +{ + struct lu_seq_range tmp; + int rc; + char kernbuf[MAX_FID_RANGE_STRLEN]; + + LASSERT(range != NULL); + + if (count >= sizeof(kernbuf)) + return -EINVAL; + + if (copy_from_user(kernbuf, buffer, count)) + return -EFAULT; + + kernbuf[count] = 0; + + if (count == 5 && strcmp(kernbuf, "clear") == 0) { + memset(range, 0, sizeof(*range)); + return count; + } + + /* of the form "[0x0000000240000400 - 0x000000028000400]" */ + rc = sscanf(kernbuf, "[%llx - %llx]\n", + (unsigned long long *)&tmp.lsr_start, + (unsigned long long *)&tmp.lsr_end); + if (!range_is_sane(&tmp) || range_is_zero(&tmp) || + tmp.lsr_start < range->lsr_start || tmp.lsr_end > range->lsr_end) + return -EINVAL; + *range = tmp; + return count; +} + +/* Client side procfs stuff */ +static ssize_t lprocfs_fid_space_seq_write(struct file *file, + const char __user *buffer, + size_t count, loff_t *off) +{ + struct lu_client_seq *seq; + int rc; + + seq = ((struct seq_file *)file->private_data)->private; + LASSERT(seq != NULL); + + mutex_lock(&seq->lcs_mutex); + rc = lprocfs_fid_write_common(buffer, count, &seq->lcs_space); + + if (rc == 0) { + CDEBUG(D_INFO, "%s: Space: "DRANGE"\n", + seq->lcs_name, PRANGE(&seq->lcs_space)); + } + + mutex_unlock(&seq->lcs_mutex); + + return count; +} + +static int +lprocfs_fid_space_seq_show(struct seq_file *m, void *unused) +{ + struct lu_client_seq *seq = (struct lu_client_seq *)m->private; + + LASSERT(seq != NULL); + + mutex_lock(&seq->lcs_mutex); + seq_printf(m, "[%#llx - %#llx]:%x:%s\n", PRANGE(&seq->lcs_space)); + mutex_unlock(&seq->lcs_mutex); + + return 0; +} + +static ssize_t lprocfs_fid_width_seq_write(struct file *file, + const char __user *buffer, + size_t count, loff_t *off) +{ + struct lu_client_seq *seq; + __u64 max; + int rc, val; + + seq = ((struct seq_file *)file->private_data)->private; + LASSERT(seq != NULL); + + rc = lprocfs_write_helper(buffer, count, &val); + if (rc) + return rc; + + mutex_lock(&seq->lcs_mutex); + if (seq->lcs_type == LUSTRE_SEQ_DATA) + max = LUSTRE_DATA_SEQ_MAX_WIDTH; + else + max = LUSTRE_METADATA_SEQ_MAX_WIDTH; + + if (val <= max && val > 0) { + seq->lcs_width = val; + + if (rc == 0) { + CDEBUG(D_INFO, "%s: Sequence size: %llu\n", + seq->lcs_name, seq->lcs_width); + } + } + + mutex_unlock(&seq->lcs_mutex); + + return count; +} + +static int +lprocfs_fid_width_seq_show(struct seq_file *m, void *unused) +{ + struct lu_client_seq *seq = (struct lu_client_seq *)m->private; + + LASSERT(seq != NULL); + + mutex_lock(&seq->lcs_mutex); + seq_printf(m, "%llu\n", seq->lcs_width); + mutex_unlock(&seq->lcs_mutex); + + return 0; +} + +static int +lprocfs_fid_fid_seq_show(struct seq_file *m, void *unused) +{ + struct lu_client_seq *seq = (struct lu_client_seq *)m->private; + + LASSERT(seq != NULL); + + mutex_lock(&seq->lcs_mutex); + seq_printf(m, DFID "\n", PFID(&seq->lcs_fid)); + mutex_unlock(&seq->lcs_mutex); + + return 0; +} + +static int +lprocfs_fid_server_seq_show(struct seq_file *m, void *unused) +{ + struct lu_client_seq *seq = (struct lu_client_seq *)m->private; + struct client_obd *cli; + + LASSERT(seq != NULL); + + if (seq->lcs_exp != NULL) { + cli = &seq->lcs_exp->exp_obd->u.cli; + seq_printf(m, "%s\n", cli->cl_target_uuid.uuid); + } else { + seq_printf(m, "%s\n", seq->lcs_srv->lss_name); + } + + return 0; +} + +LPROC_SEQ_FOPS(lprocfs_fid_space); +LPROC_SEQ_FOPS(lprocfs_fid_width); +LPROC_SEQ_FOPS_RO(lprocfs_fid_server); +LPROC_SEQ_FOPS_RO(lprocfs_fid_fid); + +struct lprocfs_vars seq_client_proc_list[] = { + { "space", &lprocfs_fid_space_fops }, + { "width", &lprocfs_fid_width_fops }, + { "server", &lprocfs_fid_server_fops }, + { "fid", &lprocfs_fid_fid_fops }, + { NULL } +}; |