lustre/include/linux/obd_support.h

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