lustre/llite/lproc_llite.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2002 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22 #define DEBUG_SUBSYSTEM S_LLITE
  23
  24 #include <linux/version.h>
  25 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  26 #include <asm/statfs.h>
  27 #endif
  28 #include <linux/lustre_lite.h>
  29 #include <linux/lprocfs_status.h>
  30
  31 #include "llite_internal.h"
  32
  33 /* /proc/lustre/llite mount point registration */
  34
  35 #ifndef LPROCFS
  36 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
  37                                 struct super_block *sb, char *osc, char *mdc)
  38 {
  39         return 0;
  40 }
  41 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi){}
  42 #else
  43
  44 #define LPROC_LLITE_STAT_FCT(fct_name, get_statfs_fct)                    \
  45 int fct_name(char *page, char **start, off_t off,                         \
  46              int count, int *eof, void *data)                             \
  47 {                                                                         \
  48         struct statfs sfs;                                                \
  49         int rc;                                                           \
  50         LASSERT(data != NULL);                                            \
  51         rc = get_statfs_fct((struct super_block*)data, &sfs);             \
  52         return (rc==0                                                     \
  53                 ? lprocfs_##fct_name (page, start, off, count, eof, &sfs) \
  54                 : rc);                                                    \
  55 }
  56
  57 long long mnt_instance;
  58
  59 LPROC_LLITE_STAT_FCT(rd_blksize,     vfs_statfs);
  60 LPROC_LLITE_STAT_FCT(rd_kbytestotal, vfs_statfs);
  61 LPROC_LLITE_STAT_FCT(rd_kbytesfree,  vfs_statfs);
  62 LPROC_LLITE_STAT_FCT(rd_filestotal,  vfs_statfs);
  63 LPROC_LLITE_STAT_FCT(rd_filesfree,   vfs_statfs);
  64 LPROC_LLITE_STAT_FCT(rd_filegroups,  vfs_statfs);
  65
  66 int rd_path(char *page, char **start, off_t off, int count, int *eof,
  67             void *data)
  68 {
  69         return 0;
  70 }
  71
  72 int rd_fstype(char *page, char **start, off_t off, int count, int *eof,
  73               void *data)
  74 {
  75         struct super_block *sb = (struct super_block*)data;
  76
  77         LASSERT(sb != NULL);
  78         *eof = 1;
  79         return snprintf(page, count, "%s\n", sb->s_type->name);
  80 }
  81
  82 int rd_sb_uuid(char *page, char **start, off_t off, int count, int *eof,
  83                void *data)
  84 {
  85         struct super_block *sb = (struct super_block *)data;
  86
  87         LASSERT(sb != NULL);
  88         *eof = 1;
  89         return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
  90 }
  91
  92 struct lprocfs_vars lprocfs_obd_vars[] = {
  93         { "uuid",        rd_sb_uuid,     0, 0 },
  94         { "mntpt_path",  rd_path,        0, 0 },
  95         { "fstype",      rd_fstype,      0, 0 },
  96         { "blocksize",   rd_blksize,     0, 0 },
  97         { "kbytestotal", rd_kbytestotal, 0, 0 },
  98         { "kbytesfree",  rd_kbytesfree,  0, 0 },
  99         { "filestotal",  rd_filestotal,  0, 0 },
 100         { "filesfree",   rd_filesfree,   0, 0 },
 101         { "filegroups",  rd_filegroups,  0, 0 },
 102         { "dirty_pages", ll_rd_dirty_pages, 0, 0},
 103         { "max_dirty_pages", ll_rd_max_dirty_pages, ll_wr_max_dirty_pages, 0},
 104         { 0 }
 105 };
 106
 107 #define MAX_STRING_SIZE 128
 108
 109 struct llite_file_opcode {
 110         __u32       opcode;
 111         __u32       type;
 112         const char *opname;
 113 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 114         /* file operation */
 115         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 116         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 117         { LPROC_LL_WB_WRITEPAGE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 118                                    "writeback_from_writepage" },
 119         { LPROC_LL_WB_PRESSURE,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 120                                    "writeback_from_pressure" },
 121         { LPROC_LL_WB_OK,          LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 122                                    "writeback_ok_pages" },
 123         { LPROC_LL_WB_FAIL,        LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 124                                    "writeback_failed_pages" },
 125         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 126                                    "read_bytes" },
 127         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 128                                    "write_bytes" },
 129         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 130                                    "brw_read" },
 131         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 132                                    "brw_write" },
 133
 134         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 135         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 136         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 137         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 138         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 139         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 140         /* inode operation */
 141         { LPROC_LL_SETATTR_RAW,    LPROCFS_TYPE_REGS, "setattr_raw" },
 142         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 143         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "punch" },
 144 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 145         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 146 #else
 147         { LPROC_LL_REVALIDATE,     LPROCFS_TYPE_REGS, "getattr" },
 148 #endif
 149         /* special inode operation */
 150         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 151         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 152         { LPROC_LL_DIRECT_READ,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 153                                    "direct_read" },
 154         { LPROC_LL_DIRECT_WRITE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 155                                    "direct_write" },
 156
 157 };
 158
 159 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 160                                 struct super_block *sb, char *osc, char *mdc)
 161 {
 162         struct lprocfs_vars lvars[2];
 163         struct ll_sb_info *sbi = ll_s2sbi(sb);
 164         struct obd_device *obd;
 165         char name[MAX_STRING_SIZE + 1];
 166         int err, id;
 167         struct lprocfs_stats *svc_stats = NULL;
 168         ENTRY;
 169
 170         memset(lvars, 0, sizeof(lvars));
 171
 172         name[MAX_STRING_SIZE] = '\0';
 173         lvars[0].name = name;
 174
 175         LASSERT(sbi != NULL);
 176         LASSERT(mdc != NULL);
 177         LASSERT(osc != NULL);
 178
 179         /* Mount info */
 180         snprintf(name, MAX_STRING_SIZE, "fs%llu", mnt_instance);
 181
 182         mnt_instance++;
 183         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 184         if (IS_ERR(sbi->ll_proc_root)) {
 185                 err = PTR_ERR(sbi->ll_proc_root);
 186                 sbi->ll_proc_root = NULL;
 187                 RETURN(err);
 188         }
 189
 190         svc_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES);
 191         if (svc_stats == NULL) {
 192                 err = -ENOMEM;
 193                 goto out;
 194         }
 195         /* do counter init */
 196         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 197                 __u32 type = llite_opcode_table[id].type;
 198                 void *ptr = NULL;
 199                 if (type & LPROCFS_TYPE_REGS)
 200                         ptr = "regs";
 201                 else {
 202                         if (type & LPROCFS_TYPE_BYTES)
 203                                 ptr = "bytes";
 204                         else {
 205                                 if (type & LPROCFS_TYPE_PAGES)
 206                                         ptr = "pages";
 207                         }
 208                 }
 209                 lprocfs_counter_init(svc_stats, llite_opcode_table[id].opcode,
 210                                      (type & LPROCFS_CNTR_AVGMINMAX),
 211                                      llite_opcode_table[id].opname, ptr);
 212         }
 213         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", svc_stats);
 214         if (err)
 215                 goto out;
 216         else
 217                 sbi->ll_stats = svc_stats;
 218         /* need place to keep svc_stats */
 219
 220         /* Static configuration info */
 221         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_obd_vars, sb);
 222         if (err)
 223                 goto out;
 224
 225         /* MDC info */
 226         obd = class_name2obd(mdc);
 227
 228         LASSERT(obd != NULL);
 229         LASSERT(obd->obd_type != NULL);
 230         LASSERT(obd->obd_type->typ_name != NULL);
 231
 232         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 233                  obd->obd_type->typ_name);
 234         lvars[0].read_fptr = lprocfs_rd_name;
 235         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 236         if (err)
 237                 goto out;
 238
 239         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 240         lvars[0].read_fptr = lprocfs_rd_uuid;
 241         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 242         if (err)
 243                 goto out;
 244
 245         /* OSC */
 246         obd = class_name2obd(osc);
 247
 248         LASSERT(obd != NULL);
 249         LASSERT(obd->obd_type != NULL);
 250         LASSERT(obd->obd_type->typ_name != NULL);
 251
 252         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 253                  obd->obd_type->typ_name);
 254         lvars[0].read_fptr = lprocfs_rd_name;
 255         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 256         if (err)
 257                 goto out;
 258
 259         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 260         lvars[0].read_fptr = lprocfs_rd_uuid;
 261         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 262 out:
 263         if (err) {
 264                 if (svc_stats)
 265                         lprocfs_free_stats(svc_stats);
 266                 if (sbi->ll_proc_root)
 267                         lprocfs_remove(sbi->ll_proc_root);
 268         }
 269         RETURN(err);
 270 }
 271
 272 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 273 {
 274         if (sbi->ll_proc_root) {
 275                 struct proc_dir_entry *file_stats =
 276                         lprocfs_srch(sbi->ll_proc_root, "stats");
 277
 278                 if (file_stats) {
 279                         lprocfs_free_stats(sbi->ll_stats);
 280                         lprocfs_remove(file_stats);
 281                 }
 282         }
 283 }
 284 #undef MAX_STRING_SIZE
 285 #endif /* LPROCFS */