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 /* /proc/lustre/llite mount point registration */
  32
  33 #ifndef LPROCFS
  34 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
  35                                 struct super_block *sb, char *osc, char *mdc)
  36 {
  37         return 0;
  38 }
  39 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi){}
  40 #else
  41
  42 #define LPROC_LLITE_STAT_FCT(fct_name, get_statfs_fct)                    \
  43 int fct_name(char *page, char **start, off_t off,                         \
  44              int count, int *eof, void *data)                             \
  45 {                                                                         \
  46         struct statfs sfs;                                                \
  47         int rc;                                                           \
  48         LASSERT(data != NULL);                                            \
  49         rc = get_statfs_fct((struct super_block*)data, &sfs);             \
  50         return (rc==0                                                     \
  51                 ? lprocfs_##fct_name (page, start, off, count, eof, &sfs) \
  52                 : rc);                                                    \
  53 }
  54
  55 long long mnt_instance;
  56
  57 LPROC_LLITE_STAT_FCT(rd_blksize,     vfs_statfs);
  58 LPROC_LLITE_STAT_FCT(rd_kbytestotal, vfs_statfs);
  59 LPROC_LLITE_STAT_FCT(rd_kbytesfree,  vfs_statfs);
  60 LPROC_LLITE_STAT_FCT(rd_filestotal,  vfs_statfs);
  61 LPROC_LLITE_STAT_FCT(rd_filesfree,   vfs_statfs);
  62 LPROC_LLITE_STAT_FCT(rd_filegroups,  vfs_statfs);
  63
  64 int rd_path(char *page, char **start, off_t off, int count, int *eof,
  65             void *data)
  66 {
  67         return 0;
  68 }
  69
  70 int rd_fstype(char *page, char **start, off_t off, int count, int *eof,
  71               void *data)
  72 {
  73         struct super_block *sb = (struct super_block*)data;
  74
  75         LASSERT(sb != NULL);
  76         *eof = 1;
  77         return snprintf(page, count, "%s\n", sb->s_type->name);
  78 }
  79
  80 int rd_sb_uuid(char *page, char **start, off_t off, int count, int *eof,
  81                void *data)
  82 {
  83         struct super_block *sb = (struct super_block *)data;
  84
  85         LASSERT(sb != NULL);
  86         *eof = 1;
  87         return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
  88 }
  89
  90 struct lprocfs_vars lprocfs_obd_vars[] = {
  91         { "uuid",        rd_sb_uuid,     0, 0 },
  92         { "mntpt_path",  rd_path,        0, 0 },
  93         { "fstype",      rd_fstype,      0, 0 },
  94         { "blocksize",   rd_blksize,     0, 0 },
  95         { "kbytestotal", rd_kbytestotal, 0, 0 },
  96         { "kbytesfree",  rd_kbytesfree,  0, 0 },
  97         { "filestotal",  rd_filestotal,  0, 0 },
  98         { "filesfree",   rd_filesfree,   0, 0 },
  99         { "filegroups",  rd_filegroups,  0, 0 },
 100         { 0 }
 101 };
 102
 103 #define MAX_STRING_SIZE 128
 104
 105 struct llite_file_opcode {
 106         __u32       opcode;
 107         __u32       type;
 108         const char *opname;
 109 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 110         /* file operation */
 111         { LPROC_LL_DIRTY_PAGES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 112                                    "dirty_pages" },
 113         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 114         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 115         { LPROC_LL_WB_WRITEPAGE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 116                                    "writeback_from_writepage" },
 117         { LPROC_LL_WB_PRESSURE,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 118                                    "writeback_from_pressure" },
 119         { LPROC_LL_WB_OK,          LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 120                                    "writeback_ok_pages" },
 121         { LPROC_LL_WB_FAIL,        LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 122                                    "writeback_failed_pages" },
 123         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 124                                    "read_bytes" },
 125         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 126                                    "write_bytes" },
 127         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 128                                    "brw_read" },
 129         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 130                                    "brw_write" },
 131
 132         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 133         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 134         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 135         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 136         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 137         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 138         /* inode operation */
 139         { LPROC_LL_SETATTR_RAW,    LPROCFS_TYPE_REGS, "setattr_raw" },
 140         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 141         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "punch" },
 142 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
 143         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 144 #else
 145         { LPROC_LL_REVALIDATE,     LPROCFS_TYPE_REGS, "getattr" },
 146 #endif
 147         /* special inode operation */
 148         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 149         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 150         { LPROC_LL_DIRECT_READ,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 151                                    "direct_read" },
 152         { LPROC_LL_DIRECT_WRITE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 153                                    "direct_write" },
 154
 155 };
 156
 157 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 158                                 struct super_block *sb, char *osc, char *mdc)
 159 {
 160         struct lprocfs_vars lvars[2];
 161         struct ll_sb_info *sbi = ll_s2sbi(sb);
 162         struct obd_device *obd;
 163         char name[MAX_STRING_SIZE + 1];
 164         struct obd_uuid uuid;
 165         int err, id;
 166         struct lprocfs_stats *svc_stats = NULL;
 167         ENTRY;
 168
 169         memset(lvars, 0, sizeof(lvars));
 170
 171         name[MAX_STRING_SIZE] = '\0';
 172         lvars[0].name = name;
 173
 174         LASSERT(sbi != NULL);
 175         LASSERT(mdc != NULL);
 176         LASSERT(osc != NULL);
 177
 178         /* Mount info */
 179         snprintf(name, MAX_STRING_SIZE, "fs%llu", mnt_instance);
 180
 181         mnt_instance++;
 182         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 183         if (IS_ERR(sbi->ll_proc_root)) {
 184                 err = PTR_ERR(sbi->ll_proc_root);
 185                 sbi->ll_proc_root = NULL;
 186                 RETURN(err);
 187         }
 188
 189         svc_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES);
 190         if (svc_stats == NULL) {
 191                 err = -ENOMEM;
 192                 goto out;
 193         }
 194         /* do counter init */
 195         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 196                 __u32 type = llite_opcode_table[id].type;
 197                 void *ptr = NULL;
 198                 if (type & LPROCFS_TYPE_REGS)
 199                         ptr = "regs";
 200                 else {
 201                         if (type & LPROCFS_TYPE_BYTES)
 202                                 ptr = "bytes";
 203                         else {
 204                                 if (type & LPROCFS_TYPE_PAGES)
 205                                         ptr = "pages";
 206                         }
 207                 }
 208                 lprocfs_counter_init(svc_stats, llite_opcode_table[id].opcode,
 209                                      (type & LPROCFS_CNTR_AVGMINMAX),
 210                                      llite_opcode_table[id].opname, ptr);
 211         }
 212         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", svc_stats);
 213         if (err)
 214                 goto out;
 215         else
 216                 sbi->ll_stats = svc_stats;
 217         /* need place to keep svc_stats */
 218
 219         /* Static configuration info */
 220         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_obd_vars, sb);
 221         if (err)
 222                 goto out;
 223
 224         /* MDC info */
 225         strncpy(uuid.uuid, mdc, sizeof(uuid.uuid));
 226         obd = class_uuid2obd(&uuid);
 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         strncpy(uuid.uuid, osc, sizeof(uuid.uuid));
 247         obd = class_uuid2obd(&uuid);
 248
 249         LASSERT(obd != NULL);
 250         LASSERT(obd->obd_type != NULL);
 251         LASSERT(obd->obd_type->typ_name != NULL);
 252
 253         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 254                  obd->obd_type->typ_name);
 255         lvars[0].read_fptr = lprocfs_rd_name;
 256         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 257         if (err)
 258                 goto out;
 259
 260         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 261         lvars[0].read_fptr = lprocfs_rd_uuid;
 262         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 263 out:
 264         if (err) {
 265                 if (svc_stats)
 266                         lprocfs_free_stats(svc_stats);
 267                 if (sbi->ll_proc_root)
 268                         lprocfs_remove(sbi->ll_proc_root);
 269         }
 270         RETURN(err);
 271 }
 272
 273 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 274 {
 275         if (sbi->ll_proc_root) {
 276                 struct proc_dir_entry *file_stats =
 277                         lprocfs_srch(sbi->ll_proc_root, "stats");
 278
 279                 if (file_stats) {
 280                         lprocfs_free_stats(sbi->ll_stats);
 281                         lprocfs_remove(file_stats);
 282                 }
 283         }
 284 }
 285 #undef MAX_STRING_SIZE
 286 #endif /* LPROCFS */