])
])
+# 2.6.32 has new BDI interface.
+AC_DEFUN([LC_NEW_BACKING_DEV_INFO],
+[AC_MSG_CHECKING([if backing_dev_info has a wb_cnt field])
+LB_LINUX_TRY_COMPILE([
+ #include <linux/backing-dev.h>
+],[
+ struct backing_dev_info bdi;
+ bdi.wb_cnt = 0;
+],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_NEW_BACKING_DEV_INFO, 1,
+ [backing_dev_info has a wb_cnt field])
+],[
+ AC_MSG_RESULT(no)
+])
+])
+
+# 2.6.24 has bdi_init()/bdi_destroy() functions.
+AC_DEFUN([LC_EXPORT_BDI_INIT],
+[LB_CHECK_SYMBOL_EXPORT([bdi_init],
+[mm/backing-dev.c],[
+ AC_DEFINE(HAVE_BDI_INIT, 1,
+ [bdi_init/bdi_destroy functions are present])
+],[
+])
+])
+
#
# LC_PROG_LINUX
#
LC_STRUCT_HASH_DESC
LC_STRUCT_BLKCIPHER_DESC
LC_FS_RENAME_DOES_D_MOVE
+
# 2.6.23
LC_UNREGISTER_BLKDEV_RETURN_INT
LC_KERNEL_SPLICE_READ
LC_BIO_ENDIO_2ARG
LC_FH_TO_DENTRY
LC_PROCFS_DELETED
+ LC_EXPORT_BDI_INIT
#2.6.25
LC_MAPPING_CAP_WRITEBACK_DIRTY
# 2.6.32
LC_DQUOT_INIT
LC_REQUEST_QUEUE_LIMITS
+ LC_NEW_BACKING_DEV_INFO
#
if test x$enable_server = xyes ; then
# define ll_vfs_dq_drop vfs_dq_drop
#endif
+#ifdef HAVE_BDI_INIT
+#define ll_bdi_init(bdi) bdi_init(bdi)
+#define ll_bdi_destroy(bdi) bdi_destroy(bdi)
+#else
+#define ll_bdi_init(bdi) 0
+#define ll_bdi_destroy(bdi) do { } while(0)
+#endif
+
+#ifdef HAVE_NEW_BACKING_DEV_INFO
+#define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
+#else
+#define ll_bdi_wb_cnt(bdi) 1
+#endif
+
#endif /* __KERNEL__ */
#endif /* _COMPAT25_H */
cfs_spin_lock_init(&lli->lli_sa_lock);
}
+#ifdef HAVE_NEW_BACKING_DEV_INFO
+static atomic_t ll_bdi_num = ATOMIC_INIT(0);
+#endif
+
int ll_fill_super(struct super_block *sb)
{
struct lustre_profile *lprof;
if (err)
GOTO(out_free, err);
+ err = ll_bdi_init(&lsi->bdi);
+ if (err)
+ GOTO(out_free, err);
+
+#ifdef HAVE_NEW_BACKING_DEV_INFO
+ lsi->bdi.name = "lustre";
+ lsi->bdi.capabilities = BDI_CAP_MAP_COPY;
+ err = bdi_register(&lsi->bdi, NULL, "lustre-%d",
+ atomic_inc_return(&ll_bdi_num));
+ sb->s_bdi = &lsi->bdi;
+#endif
+
/* Generate a string unique to this super, in case some joker tries
to mount the same fs at two mount points.
Use the address of the super itself.*/
if (profilenm)
class_del_profile(profilenm);
+ if (ll_bdi_wb_cnt(lsi->bdi) > 0)
+ ll_bdi_destroy(&lsi->bdi);
+
ll_free_sbi(sb);
lsi->lsi_llsbi = NULL;
}
}
-static struct backing_dev_info ll_backing_dev_info = {
- .ra_pages = 0, /* No readahead */
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12))
- .capabilities = 0, /* Does contribute to dirty memory */
-#else
- .memory_backed = 0, /* Does contribute to dirty memory */
-#endif
-};
-
void ll_read_inode2(struct inode *inode, void *opaque)
{
struct lustre_md *md = opaque;
/* OIDEBUG(inode); */
+ /* initializing backing dev info. */
+ inode->i_mapping->backing_dev_info = &(s2lsi(inode->i_sb)->bdi);
+
+
if (S_ISREG(inode->i_mode)) {
struct ll_sb_info *sbi = ll_i2sbi(inode);
inode->i_op = &ll_file_inode_operations;
init_special_inode(inode, inode->i_mode,
kdev_t_to_nr(inode->i_rdev));
- /* initializing backing dev info. */
- inode->i_mapping->backing_dev_info = &ll_backing_dev_info;
-
EXIT;
}
}