lustre/include/linux/obd_support.h

   1 #ifndef _OBD_SUPPORT
   2 #define _OBD_SUPPORT
   3 /*
   4  * Copyright (C) 2001  Cluster File Systems, Inc.
   5  *
   6  * This code is issued under the GNU General Public License.
   7  * See the file COPYING in this distribution
   8  */
   9
  10 #include <linux/autoconf.h>
  11 #include <linux/slab.h>
  12 #include <linux/vmalloc.h>
  13
  14 #define MIN(a,b) (((a)<(b)) ? (a): (b))
  15 #define MAX(a,b) (((a)>(b)) ? (a): (b))
  16
  17 #define obd_unlock_page(page)   do {    if (PageLocked(page)) { \
  18                         UnlockPage(page);\
  19                 } else {\
  20                         printk("file %s, line %d: expecting locked page\n",\
  21                                __FILE__, __LINE__); \
  22                 }                       \
  23 } while(0)
  24
  25 /*
  26  * Debug code
  27  */
  28 /* global variables */
  29 extern int obd_debug_level;
  30 extern int obd_print_entry;
  31 extern int obd_inodes;
  32 extern int obd_pages;
  33 extern long obd_memory;
  34
  35 #define EXT2_OBD_DEBUG
  36
  37 #ifdef EXT2_OBD_DEBUG
  38 #define CMD(cmd) (( cmd == READ ) ? "read" : "write")
  39
  40 /* debugging masks */
  41 #define D_PSDEV   0x001 /* debug information from psdev.c */
  42 #define D_INODE   0x002
  43 #define D_SUPER   0x004
  44 #define D_SNAP    0x008
  45 #define D_UNUSED4 0x010
  46 #define D_WARNING 0x020 /* misc warnings */
  47 #define D_EXT2    0x040 /* anything from ext2_debug */
  48 #define D_MALLOC  0x080 /* print malloc, free information */
  49 #define D_CACHE   0x100 /* cache-related items */
  50 #define D_INFO    0x200 /* general information, especially from interface.c */
  51 #define D_IOCTL   0x400 /* ioctl related information */
  52 #define D_BLOCKS  0x800 /* ext2 block allocation */
  53 #define D_NET    0x1000 /* network communications */
  54 #define D_PUNCH  0x2000
  55 #define D_BUFFS  0x4000 /* print network buffers */
  56
  57 #define CDEBUG(mask, format, a...)                                      \
  58         do {                                                            \
  59         if (obd_debug_level & mask) {                                   \
  60                 printk("(%s:%d):", __FUNCTION__, __LINE__);             \
  61                 printk(format, ## a); }                                 \
  62         } while (0)
  63
  64 #define ENTRY if (obd_print_entry)                                      \
  65         printk(KERN_INFO "Process %d entered %s\n", current->pid, __FUNCTION__)
  66
  67 #define EXIT if (obd_print_entry)                                       \
  68         printk(KERN_INFO "Process %d leaving %s [%d]\n", current->pid,  \
  69                __FUNCTION__, __LINE__)
  70
  71 /* Inode common information printed out (used by obdfs and ext2obd inodes) */
  72 #define ICDEBUG(inode) {                                                \
  73         CDEBUG(D_INFO,                                                  \
  74                "ino %ld, atm %ld, mtm %ld, ctm %ld, size %Ld, blocks %ld\n",\
  75                inode->i_ino, inode->i_atime, inode->i_mtime, inode->i_ctime,\
  76                inode->i_size, inode->i_blocks);                         \
  77         CDEBUG(D_INFO, "mode %o, uid %d, gid %d, nlnk %d, count %d\n",  \
  78                inode->i_mode, inode->i_uid, inode->i_gid, inode->i_nlink,\
  79                atomic_read(&inode->i_count));                                         \
  80 }
  81
  82 /* Ext2 inode information */
  83 #define EXDEBUG(inode) {                                                \
  84         ICDEBUG(inode);                                                 \
  85         CDEBUG(D_INFO, "ext2 blocks: %d %d %d %d %d %d %d %d\n",        \
  86                inode->u.ext2_i.i_data[0], inode->u.ext2_i.i_data[1],    \
  87                inode->u.ext2_i.i_data[2], inode->u.ext2_i.i_data[3],    \
  88                inode->u.ext2_i.i_data[4], inode->u.ext2_i.i_data[5],    \
  89                inode->u.ext2_i.i_data[6], inode->u.ext2_i.i_data[7]);   \
  90 }
  91
  92 /* OBDFS inode information */
  93 #define OIDEBUG(inode) {                                                \
  94         ICDEBUG(inode);                                                 \
  95         CDEBUG(D_INFO,"oinfo: flags 0x%08x\n", obdfs_i2info(inode)->oi_flags);\
  96         /* obdfs_print_plist(inode); */                                 \
  97 }
  98
  99 #define ODEBUG(obdo) {                                                  \
 100         CDEBUG(D_INFO, "id %ld, atm %ld, mtm %ld, ctm %ld, "            \
 101                "size %ld, blocks %ld\n",                                \
 102                (long)(obdo)->o_id, (long)(obdo)->o_atime,               \
 103                (long)(obdo)->o_mtime, (long)(obdo)->o_ctime,            \
 104                (long)(obdo)->o_size, (long)(obdo)->o_blocks);           \
 105         CDEBUG(D_INFO, " mode %o, uid %d, gid %d, flg 0x%0x, "          \
 106                "obdflg 0x%0x, nlnk %d, valid 0x%0x\n",                  \
 107                (obdo)->o_mode, (obdo)->o_uid, (obdo)->o_gid, (obdo)->o_flags,\
 108                (obdo)->o_obdflags, (obdo)->o_nlink, (obdo)->o_valid);   \
 109 }
 110
 111
 112 #define PDEBUG(page,msg) {                                              \
 113         if (page){                                                      \
 114                 char *uptodate = (Page_Uptodate(page)) ? "upto" : "outof";\
 115                 char *locked = (PageLocked(page)) ? "" : "un";          \
 116                 char *buffer = page->buffers ? "buffer" : "";           \
 117                 int count = page_count(page);                           \
 118                 long index = page->index;                               \
 119                 CDEBUG(D_CACHE, "%s: ** off %ld, %sdate, %slocked, flag %ld,"\
 120                        " cnt %d page 0x%p pages %ld virt %lx %s**\n",   \
 121                        msg, index, uptodate, locked, page->flags, count,\
 122                        page, page->mapping ? page->mapping->nrpages : -1,\
 123                        page->virtual, buffer);                          \
 124         } else                                                          \
 125                 CDEBUG(D_CACHE, "** %s: no page\n", msg);               \
 126 }
 127
 128 #if 0
 129 #define iget(sb, ino) obd_iget(sb, ino)
 130 #define iput(sb, ino) obd_iput(sb, ino)
 131
 132 static inline struct inode *obd_iget(struct super_block *sb, unsigned long ino)
 133 {
 134         struct inode *inode;
 135
 136         if ((inode = iget(sb, ino)) == NULL)
 137                 CDEBUG(D_INODE, "NULL in iget for %ld\n", ino);
 138         else
 139                 obd_inodes++;
 140         return inode;
 141 }
 142
 143 static inline void obd_iput(struct inode *inode)
 144 {
 145         if (inode == NULL)
 146                 CDEBUG(D_INODE, "NULL in iput\n");
 147         else
 148                 obd_inodes--;
 149 }
 150 #endif
 151
 152 #else /* EXT2_OBD_DEBUG */
 153
 154 #define CDEBUG(mask, format, a...) {}
 155 #define ENTRY {}
 156 #define EXIT {}
 157 #define ODEBUG(obdo) {}
 158 #define EXDEBUG(inode) {}
 159 #define OIDEBUG(inode) {}
 160 #define PDEBUG(page, cmd) {}
 161
 162 #endif /* EXT2_OBD_DEBUG */
 163
 164
 165
 166 #define OBD_ALLOC(ptr, cast, size)                                      \
 167 do {                                                                    \
 168         if (size <= 4096) {                                             \
 169                 ptr = (cast)kmalloc((unsigned long) size, GFP_KERNEL);  \
 170                 CDEBUG(D_MALLOC, "kmalloced: %d at %x.\n",              \
 171                        (int) size, (int) ptr);                          \
 172         } else {                                                        \
 173                 ptr = (cast)vmalloc((unsigned long) size);              \
 174                 CDEBUG(D_MALLOC, "vmalloced: %d at %x.\n",              \
 175                        (int) size, (int) ptr);                          \
 176         }                                                               \
 177         if (ptr == 0) {                                                 \
 178                 printk("kernel malloc returns 0 at %s:%d\n",            \
 179                        __FILE__, __LINE__);                             \
 180         } else {                                                        \
 181                 memset(ptr, 0, size);                                   \
 182                 obd_memory += size;                                     \
 183         }                                                               \
 184 } while (0)
 185
 186 #define OBD_FREE(ptr,size)                              \
 187 do {                                                    \
 188         if (size <= 4096) {                             \
 189                 kfree((ptr));                   \
 190                 CDEBUG(D_MALLOC, "kfreed: %d at %x.\n", \
 191                        (int) size, (int) ptr);          \
 192         } else {                                        \
 193                 vfree((ptr));                           \
 194                 CDEBUG(D_MALLOC, "vfreed: %d at %x.\n", \
 195                        (int) size, (int) ptr);          \
 196         }                                               \
 197         obd_memory -= size;                             \
 198 } while (0)
 199
 200
 201
 202 #endif
 203