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/kp30.h>
  13
  14 #define obd_unlock_page(page)                                           \
  15 do {                                                                    \
  16         if (PageLocked(page)) {                                         \
  17                 UnlockPage(page);                                       \
  18         } else {                                                        \
  19                 printk("file %s, line %d: expecting locked page\n",     \
  20                        __FILE__, __LINE__);                             \
  21         }                                                               \
  22 } while(0)
  23
  24 /*
  25  * Debug code
  26  */
  27 /* global variables */
  28 extern int obd_debug_level;
  29 extern int obd_print_entry;
  30 extern int obd_inodes;
  31 extern int obd_pages;
  32 extern long obd_memory;
  33
  34 #define EXT2_OBD_DEBUG
  35
  36 #ifdef EXT2_OBD_DEBUG
  37 #define CMD(cmd) (( cmd == READ ) ? "read" : "write")
  38
  39 /* Inode common information printed out (used by obdfs and ext2obd inodes) */
  40 #define ICDEBUG(inode) {                                                \
  41         CDEBUG(D_INFO, "ino %ld, atm %ld, mtm %ld, ctm %ld, size %Ld, " \
  42                "blocks %ld\n", inode->i_ino, inode->i_atime,            \
  43                inode->i_mtime, inode->i_ctime, inode->i_size,           \
  44                inode->i_blocks);                                        \
  45         CDEBUG(D_INFO, "mode %o, uid %d, gid %d, nlnk %d, count %d\n",  \
  46                inode->i_mode, inode->i_uid, inode->i_gid,               \
  47                inode->i_nlink, atomic_read(&inode->i_count));           \
  48 }
  49
  50 /* Ext2 inode information */
  51 #define EXDEBUG(inode) {                                                \
  52         ICDEBUG(inode);                                                 \
  53         CDEBUG(D_INFO, "ext2 blocks: %d %d %d %d %d %d %d %d\n",        \
  54                inode->u.ext2_i.i_data[0], inode->u.ext2_i.i_data[1],    \
  55                inode->u.ext2_i.i_data[2], inode->u.ext2_i.i_data[3],    \
  56                inode->u.ext2_i.i_data[4], inode->u.ext2_i.i_data[5],    \
  57                inode->u.ext2_i.i_data[6], inode->u.ext2_i.i_data[7]);   \
  58 }
  59
  60 /* OBDFS inode information */
  61 #define OIDEBUG(inode) {                                                \
  62         ICDEBUG(inode);                                                 \
  63         CDEBUG(D_INFO,"oinfo: flags 0x%08x\n", obdfs_i2info(inode)->oi_flags);\
  64         /* obdfs_print_plist(inode); */                                 \
  65 }
  66
  67 #define ODEBUG(obdo) {                                                  \
  68         CDEBUG(D_INFO, "id %ld, atm %ld, mtm %ld, ctm %ld, "            \
  69                "size %ld, blocks %ld\n",                                \
  70                (long)(obdo)->o_id, (long)(obdo)->o_atime,               \
  71                (long)(obdo)->o_mtime, (long)(obdo)->o_ctime,            \
  72                (long)(obdo)->o_size, (long)(obdo)->o_blocks);           \
  73         CDEBUG(D_INFO, " mode %o, uid %d, gid %d, flg 0x%0x, "          \
  74                "obdflg 0x%0x, nlnk %d, valid 0x%0x\n",                  \
  75                (obdo)->o_mode, (obdo)->o_uid, (obdo)->o_gid, (obdo)->o_flags,\
  76                (obdo)->o_obdflags, (obdo)->o_nlink, (obdo)->o_valid);   \
  77 }
  78
  79 #define PDEBUG(page,msg) {                                              \
  80         if (page){                                                      \
  81                 char *uptodate = (Page_Uptodate(page)) ? "upto" : "outof";\
  82                 char *locked = (PageLocked(page)) ? "" : "un";          \
  83                 char *buffer = page->buffers ? "buffer" : "";           \
  84                 int count = page_count(page);                           \
  85                 long index = page->index;                               \
  86                 CDEBUG(D_CACHE, "%s: ** off %ld, %sdate, %slocked, flag %ld,"\
  87                        " cnt %d page 0x%p pages %ld virt %lx %s**\n",   \
  88                        msg, index, uptodate, locked, page->flags, count,\
  89                        page, page->mapping ? page->mapping->nrpages : -1,\
  90                        page->virtual, buffer);                          \
  91         } else                                                          \
  92                 CDEBUG(D_CACHE, "** %s: no page\n", msg);               \
  93 }
  94
  95 #if 0
  96 #define iget(sb, ino) obd_iget(sb, ino)
  97 #define iput(sb, ino) obd_iput(sb, ino)
  98
  99 static inline struct inode *obd_iget(struct super_block *sb, unsigned long ino)
 100 {
 101         struct inode *inode;
 102
 103         if ((inode = iget(sb, ino)) == NULL)
 104                 CDEBUG(D_INODE, "NULL in iget for %ld\n", ino);
 105         else
 106                 obd_inodes++;
 107         return inode;
 108 }
 109
 110 static inline void obd_iput(struct inode *inode)
 111 {
 112         if (inode == NULL)
 113                 CDEBUG(D_INODE, "NULL in iput\n");
 114         else
 115                 obd_inodes--;
 116 }
 117 #endif
 118
 119 #else /* EXT2_OBD_DEBUG */
 120
 121 #define CDEBUG(mask, format, a...) {}
 122 #define ENTRY {}
 123 #define EXIT {}
 124 #define ODEBUG(obdo) {}
 125 #define EXDEBUG(inode) {}
 126 #define OIDEBUG(inode) {}
 127 #define PDEBUG(page, cmd) {}
 128
 129 #endif /* EXT2_OBD_DEBUG */
 130
 131 #define OBD_ALLOC(ptr, size)                                    \
 132 do {                                                            \
 133         (ptr) = kmalloc((unsigned long)(size), GFP_KERNEL);     \
 134         obd_memory += (size);                                   \
 135         CDEBUG(D_MALLOC, "kmalloced: %ld at %x (tot %ld).\n",   \
 136                (long)(size), (int)(ptr), obd_memory);           \
 137         if (ptr == NULL) {                                      \
 138                 printk("kernel malloc failed at %s:%d\n",       \
 139                        __FILE__, __LINE__);                     \
 140         } else {                                                \
 141                 memset((ptr), 0, (size));                       \
 142         }                                                       \
 143 } while (0)
 144
 145 #define OBD_FREE(ptr, size)                                  \
 146 do {                                                         \
 147         kfree((ptr));                                        \
 148         obd_memory -= (size);                                \
 149         CDEBUG(D_MALLOC, "kfreed: %d at %x (tot %ld).\n",    \
 150                (int)(size), (int)(ptr), obd_memory);         \
 151 } while (0)
 152
 153 #endif