[Cluster-devel] cluster cman/lib/libcman.c cman/lib/libcman.h ...
rpeterso at sourceware.org
rpeterso at sourceware.org
Wed Feb 7 15:25:19 UTC 2007
CVSROOT: /cvs/cluster
Module name: cluster
Branch: STABLE
Changes by: rpeterso at sourceware.org 2007-02-07 15:25:06
Modified files:
cman/lib : libcman.c libcman.h
cman-kernel/src: cnxman.c
dlm-kernel/src : lowcomms.c memory.c
gfs-kernel/src/dlm: lock_dlm.h
gfs-kernel/src/gfs: diaper.c dir.c file.c file.h gfs.h glock.c
inode.c ioctl.c ops_file.c ops_fstype.c
ops_inode.c ops_super.c recovery.c util.c
util.h
gfs-kernel/src/gulm: gulm.h gulm_fs.c handler.h
gfs-kernel/src/harness: main.c
gfs-kernel/src/nolock: main.c
gnbd-kernel/src: gnbd.c
Log message:
Bring the STABLE branch of cluster suite up to the 2.6.20-rc7 and
similar kernels. This also includes Wendy Cheng's GFS kernel change
for Asynch IO (aio) and fixes a kernel panic reported on the
linux-cluster mailing list.
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/cman/lib/libcman.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.3.6.1.2.5&r2=1.3.6.1.2.6
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/cman/lib/libcman.h.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.2.6.1.2.6&r2=1.2.6.1.2.7
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/cman-kernel/src/cnxman.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.42.2.12.4.1.2.14&r2=1.42.2.12.4.1.2.15
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/dlm-kernel/src/lowcomms.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.22.2.8.4.2.2.2&r2=1.22.2.8.4.2.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/dlm-kernel/src/memory.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.3&r2=1.3.8.1
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/dlm/lock_dlm.h.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.18.2.3.6.3&r2=1.18.2.3.6.4
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/diaper.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.1.2.1.4.1.2.1&r2=1.1.2.1.4.1.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/dir.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.8.6.1.2.3&r2=1.8.6.1.2.4
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/file.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.4.6.1.2.1&r2=1.4.6.1.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/file.h.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.2.8.1&r2=1.2.8.2
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/gfs.h.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.5.6.1&r2=1.5.6.1.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/glock.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.20.2.1.4.1.2.2&r2=1.20.2.1.4.1.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/inode.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.20.6.2.2.2&r2=1.20.6.2.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/ioctl.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.7.6.1.2.2&r2=1.7.6.1.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/ops_file.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.16.6.2.2.7&r2=1.16.6.2.2.8
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/ops_fstype.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.13.2.1.4.2.2.3&r2=1.13.2.1.4.2.2.4
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/ops_inode.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.6.6.1.2.5&r2=1.6.6.1.2.6
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/ops_super.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.12.2.1.4.2.2.2&r2=1.12.2.1.4.2.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/recovery.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.5.8.1&r2=1.5.8.2
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/util.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.9.2.1&r2=1.9.2.1.6.1
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gfs/util.h.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.7.8.1&r2=1.7.8.2
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gulm/gulm.h.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.11.6.1&r2=1.11.6.1.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gulm/gulm_fs.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.15.2.1&r2=1.15.2.1.6.1
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/gulm/handler.h.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.1&r2=1.1.8.1
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/harness/main.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.3&r2=1.3.8.1
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gfs-kernel/src/nolock/main.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.4.6.2.2.1&r2=1.4.6.2.2.2
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/gnbd-kernel/src/gnbd.c.diff?cvsroot=cluster&only_with_tag=STABLE&r1=1.6.6.1.2.4&r2=1.6.6.1.2.5
--- cluster/cman/lib/libcman.c 2006/04/26 08:55:26 1.3.6.1.2.5
+++ cluster/cman/lib/libcman.c 2007/02/07 15:25:04 1.3.6.1.2.6
@@ -501,3 +501,7 @@
return ioctl(h->fd, SIOCCLUSTER_SET_VOTES, nodeid, sizeof(int));
}
+int cman_replyto_shutdown(cman_handle_t handle, int yesno)
+{
+ return 0;
+}
--- cluster/cman/lib/libcman.h 2006/09/01 08:37:10 1.2.6.1.2.6
+++ cluster/cman/lib/libcman.h 2007/02/07 15:25:04 1.2.6.1.2.7
@@ -162,4 +162,5 @@
int cman_unregister_quorum_device(cman_handle_t handle);
int cman_poll_quorum_device(cman_handle_t handle, int isavailable);
+int cman_replyto_shutdown(cman_handle_t handle, int yesno);
#endif
--- cluster/cman-kernel/src/Attic/cnxman.c 2007/01/19 10:24:46 1.42.2.12.4.1.2.14
+++ cluster/cman-kernel/src/Attic/cnxman.c 2007/02/07 15:25:04 1.42.2.12.4.1.2.15
@@ -1760,7 +1760,7 @@
/* Make sure we have a node name */
if (nodename[0] == '\0')
- strcpy(nodename, system_utsname.nodename);
+ strcpy(nodename, init_utsname()->nodename);
membership_pid = start_membership_services(kcluster_pid);
if (membership_pid < 0) {
--- cluster/dlm-kernel/src/Attic/lowcomms.c 2005/12/20 09:22:04 1.22.2.8.4.2.2.2
+++ cluster/dlm-kernel/src/Attic/lowcomms.c 2007/02/07 15:25:04 1.22.2.8.4.2.2.3
@@ -133,7 +133,7 @@
/* An array of pointers to connections, indexed by NODEID */
static struct connection **connections;
static struct semaphore connections_lock;
-static kmem_cache_t *con_cache;
+static struct kmem_cache *con_cache;
static int conn_array_size;
static atomic_t accepting;
--- cluster/dlm-kernel/src/Attic/memory.c 2004/07/15 07:45:57 1.3
+++ cluster/dlm-kernel/src/Attic/memory.c 2007/02/07 15:25:04 1.3.8.1
@@ -24,12 +24,12 @@
/* as the man says...Shouldn't this be in a header file somewhere? */
#define BYTES_PER_WORD sizeof(void *)
-static kmem_cache_t *rsb_cache_small;
-static kmem_cache_t *rsb_cache_large;
-static kmem_cache_t *lkb_cache;
-static kmem_cache_t *lvb_cache;
-static kmem_cache_t *resdir_cache_large;
-static kmem_cache_t *resdir_cache_small;
+static struct kmem_cache *rsb_cache_small;
+static struct kmem_cache *rsb_cache_large;
+static struct kmem_cache *lkb_cache;
+static struct kmem_cache *lvb_cache;
+static struct kmem_cache *resdir_cache_large;
+static struct kmem_cache *resdir_cache_small;
/* The thresholds above which we allocate large RSBs/direntry rather than small
* ones. This must make the resultant structure end on a word boundary */
--- cluster/gfs-kernel/src/dlm/Attic/lock_dlm.h 2006/12/08 17:27:44 1.18.2.3.6.3
+++ cluster/gfs-kernel/src/dlm/Attic/lock_dlm.h 2007/02/07 15:25:05 1.18.2.3.6.4
@@ -24,10 +24,11 @@
#include <linux/socket.h>
#include <linux/kthread.h>
#include <net/sock.h>
-#include <linux/lm_interface.h>
-#include <cluster/cnxman.h>
-#include <cluster/service.h>
-#include <cluster/dlm.h>
+
+#include "lm_interface.h"
+#include "cluster/cnxman.h"
+#include "cluster/service.h"
+#include "cluster/dlm.h"
/* We take a shortcut and use lm_lockname structs for internal locks. This
means we must be careful to keep these types different from those used in
--- cluster/gfs-kernel/src/gfs/Attic/diaper.c 2006/06/26 21:53:51 1.1.2.1.4.1.2.1
+++ cluster/gfs-kernel/src/gfs/Attic/diaper.c 2007/02/07 15:25:05 1.1.2.1.4.1.2.2
@@ -50,7 +50,7 @@
static LIST_HEAD(diaper_list);
static spinlock_t diaper_lock;
static DEFINE_IDR(diaper_idr);
-kmem_cache_t *diaper_slab;
+struct kmem_cache *diaper_slab;
/**
* diaper_open -
@@ -232,9 +232,9 @@
struct inode *inode;
int error;
- mutex_lock(&real->bd_mount_mutex);
+ down(&real->bd_mount_sem);
sb = sget(&gfs_fs_type, gfs_test_bdev_super, gfs_set_bdev_super, real);
- mutex_unlock(&real->bd_mount_mutex);
+ up(&real->bd_mount_sem);
if (IS_ERR(sb))
return PTR_ERR(sb);
@@ -252,7 +252,6 @@
sb->s_op = &gfs_dummy_sops;
sb->s_fs_info = dh;
- up_write(&sb->s_umount);
module_put(gfs_fs_type.owner);
dh->dh_dummy_sb = sb;
@@ -263,7 +262,6 @@
iput(inode);
fail:
- up_write(&sb->s_umount);
deactivate_super(sb);
return error;
}
--- cluster/gfs-kernel/src/gfs/dir.c 2006/06/29 16:50:41 1.8.6.1.2.3
+++ cluster/gfs-kernel/src/gfs/dir.c 2007/02/07 15:25:05 1.8.6.1.2.4
@@ -2213,7 +2213,7 @@
dip->i_di.di_blocks--;
}
- error = gfs_writei(dip, ht, index * sizeof (uint64_t), size, gfs_zero_blocks);
+ error = gfs_writei(dip, ht, index * sizeof (uint64_t), size, gfs_zero_blocks, NULL);
if (error != size) {
if (error >= 0)
--- cluster/gfs-kernel/src/gfs/file.c 2006/02/20 03:55:31 1.4.6.1.2.1
+++ cluster/gfs-kernel/src/gfs/file.c 2007/02/07 15:25:05 1.4.6.1.2.2
@@ -305,8 +305,9 @@
int
gfs_writei(struct gfs_inode *ip, void *buf,
- uint64_t offset, unsigned int size,
- write_copy_fn_t copy_fn)
+ uint64_t offset, unsigned int size,
+ write_copy_fn_t copy_fn,
+ struct kiocb *iocb)
{
struct gfs_sbd *sdp = ip->i_sbd;
struct buffer_head *dibh, *bh;
--- cluster/gfs-kernel/src/gfs/file.h 2006/02/20 03:55:31 1.2.8.1
+++ cluster/gfs-kernel/src/gfs/file.h 2007/02/07 15:25:05 1.2.8.2
@@ -32,7 +32,8 @@
int gfs_copy_from_user(struct gfs_inode *ip, struct buffer_head *bh, void **buf,
unsigned int offset, unsigned int size, int new);
int gfs_writei(struct gfs_inode *ip, void *buf, uint64_t offset,
- unsigned int size, write_copy_fn_t copy_fn);
+ unsigned int size, write_copy_fn_t copy_fn,
+ struct kiocb *iocb);
int gfs_zero_blocks(struct gfs_inode *ip, struct buffer_head *bh, void **buf,
unsigned int offset, unsigned int size, int new);
@@ -48,7 +49,7 @@
gfs_internal_write(struct gfs_inode *ip, char *buf, uint64_t offset,
unsigned int size)
{
- return gfs_writei(ip, buf, offset, size, gfs_copy_from_mem);
+ return gfs_writei(ip, buf, offset, size, gfs_copy_from_mem, NULL);
}
#endif /* __FILE_DOT_H__ */
--- cluster/gfs-kernel/src/gfs/gfs.h 2005/04/26 18:33:10 1.5.6.1
+++ cluster/gfs-kernel/src/gfs/gfs.h 2007/02/07 15:25:05 1.5.6.1.2.1
@@ -16,9 +16,9 @@
#define GFS_RELEASE_NAME "<CVS>"
-#include <linux/lm_interface.h>
#include <linux/gfs_ondisk.h>
+#include "lm_interface.h"
#include "fixed_div64.h"
#include "lvb.h"
#include "incore.h"
@@ -67,8 +67,8 @@
#define get_v2sdp(sb) ((struct gfs_sbd *)(sb)->s_fs_info)
#define set_v2sdp(sb, sdp) (sb)->s_fs_info = (sdp)
-#define get_v2ip(inode) ((struct gfs_inode *)(inode)->u.generic_ip)
-#define set_v2ip(inode, ip) (inode)->u.generic_ip = (ip)
+#define get_v2ip(inode) ((struct gfs_inode *)(inode)->i_private)
+#define set_v2ip(inode, ip) (inode)->i_private = (ip)
#define get_v2fp(file) ((struct gfs_file *)(file)->private_data)
#define set_v2fp(file, fp) (file)->private_data = (fp)
#define get_v2bd(bh) ((struct gfs_bufdata *)(bh)->b_private)
--- cluster/gfs-kernel/src/gfs/glock.c 2006/05/17 15:28:24 1.20.2.1.4.1.2.2
+++ cluster/gfs-kernel/src/gfs/glock.c 2007/02/07 15:25:05 1.20.2.1.4.1.2.3
@@ -38,7 +38,7 @@
struct greedy {
struct gfs_holder gr_gh;
- struct work_struct gr_work;
+ struct delayed_work gr_work;
};
typedef void (*glock_examiner) (struct gfs_glock * gl);
@@ -1747,9 +1747,9 @@
*/
static void
-greedy_work(void *data)
+greedy_work(struct work_struct *work)
{
- struct greedy *gr = (struct greedy *)data;
+ struct greedy *gr = container_of(work, struct greedy, gr_work.work);
struct gfs_holder *gh = &gr->gr_gh;
struct gfs_glock *gl = gh->gh_gl;
struct gfs_glock_operations *glops = gl->gl_ops;
@@ -1804,7 +1804,7 @@
gfs_holder_init(gl, 0, 0, gh);
set_bit(HIF_GREEDY, &gh->gh_iflags);
gh->gh_owner = NULL;
- INIT_WORK(&gr->gr_work, greedy_work, gr);
+ INIT_DELAYED_WORK(&gr->gr_work, greedy_work);
set_bit(GLF_SKIP_WAITERS2, &gl->gl_flags);
schedule_delayed_work(&gr->gr_work, time);
--- cluster/gfs-kernel/src/gfs/inode.c 2005/09/18 03:01:24 1.20.6.2.2.2
+++ cluster/gfs-kernel/src/gfs/inode.c 2007/02/07 15:25:05 1.20.6.2.2.3
@@ -97,7 +97,6 @@
inode->i_mtime.tv_sec = ip->i_di.di_mtime;
inode->i_ctime.tv_sec = ip->i_di.di_ctime;
inode->i_atime.tv_nsec = inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = 0;
- inode->i_blksize = PAGE_SIZE;
inode->i_blocks = ip->i_di.di_blocks <<
(ip->i_sbd->sd_sb.sb_bsize_shift - GFS_BASIC_BLOCK_SHIFT);
inode->i_generation = ip->i_di.di_header.mh_incarn;
--- cluster/gfs-kernel/src/gfs/ioctl.c 2006/11/13 22:48:06 1.7.6.1.2.2
+++ cluster/gfs-kernel/src/gfs/ioctl.c 2007/02/07 15:25:05 1.7.6.1.2.3
@@ -1231,7 +1231,7 @@
}
error = gfs_writei(ip, gi->gi_data, gi->gi_offset, gi->gi_size,
- gfs_copy_from_user);
+ gfs_copy_from_user, NULL);
gfs_trans_end(sdp);
--- cluster/gfs-kernel/src/gfs/ops_file.c 2007/01/17 22:30:12 1.16.6.2.2.7
+++ cluster/gfs-kernel/src/gfs/ops_file.c 2007/02/07 15:25:05 1.16.6.2.2.8
@@ -74,9 +74,10 @@
};
typedef ssize_t(*do_rw_t) (struct file * file,
- char *buf,
- size_t size, loff_t * offset,
- unsigned int num_gh, struct gfs_holder * ghs);
+ char *buf,
+ size_t size, loff_t * offset,
+ struct kiocb *iocb,
+ unsigned int num_gh, struct gfs_holder * ghs);
/**
* gfs_llseek - seek to a location in a file
@@ -129,7 +130,7 @@
static ssize_t
walk_vm_hard(struct file *file, char *buf, size_t size, loff_t *offset,
- do_rw_t operation)
+ struct kiocb *iocb, do_rw_t operation)
{
struct gfs_holder *ghs;
unsigned int num_gh = 0;
@@ -178,7 +179,7 @@
gfs_assert(get_v2sdp(sb), x == num_gh,);
}
- count = operation(file, buf, size, offset, num_gh, ghs);
+ count = operation(file, buf, size, offset, iocb, num_gh, ghs);
while (num_gh--)
gfs_holder_uninit(&ghs[num_gh]);
@@ -204,7 +205,7 @@
static ssize_t
walk_vm(struct file *file, char *buf, size_t size, loff_t *offset,
- do_rw_t operation)
+ struct kiocb *iocb, do_rw_t operation)
{
if (current->mm) {
struct super_block *sb = file->f_dentry->d_inode->i_sb;
@@ -231,11 +232,11 @@
{
struct gfs_holder gh;
- return operation(file, buf, size, offset, 0, &gh);
+ return operation(file, buf, size, offset, iocb, 0, &gh);
}
do_locks:
- return walk_vm_hard(file, buf, size, offset, operation);
+ return walk_vm_hard(file, buf, size, offset, iocb, operation);
}
/**
@@ -250,7 +251,8 @@
*/
static ssize_t
-do_read_readi(struct file *file, char *buf, size_t size, loff_t *offset)
+do_read_readi(struct file *file, char *buf, size_t size, loff_t *offset,
+ struct kiocb *iocb)
{
struct gfs_inode *ip = get_v2ip(file->f_mapping->host);
ssize_t count = 0;
@@ -291,7 +293,8 @@
static ssize_t
do_read_direct(struct file *file, char *buf, size_t size, loff_t *offset,
- unsigned int num_gh, struct gfs_holder *ghs)
+ struct kiocb *iocb,
+ unsigned int num_gh, struct gfs_holder *ghs)
{
struct inode *inode = file->f_mapping->host;
struct gfs_inode *ip = get_v2ip(inode);
@@ -324,10 +327,18 @@
if (((*offset) & mask) || (((unsigned long)buf) & mask))
goto out_gunlock;
- count = do_read_readi(file, buf, size & ~mask, offset);
+ count = do_read_readi(file, buf, size & ~mask, offset, iocb);
+ }
+ else {
+ if (!iocb)
+ count = do_sync_read(file, buf, size, offset);
+ else {
+ struct iovec local_iov = { .iov_base = buf, .iov_len = size};
+
+ count = generic_file_aio_read(iocb, &local_iov, 1, *offset);
+ iocb->ki_pos = *offset;
+ }
}
- else
- count = generic_file_read(file, buf, size, offset);
error = 0;
@@ -356,7 +367,8 @@
static ssize_t
do_read_buf(struct file *file, char *buf, size_t size, loff_t *offset,
- unsigned int num_gh, struct gfs_holder *ghs)
+ struct kiocb *iocb,
+ unsigned int num_gh, struct gfs_holder *ghs)
{
struct gfs_inode *ip = get_v2ip(file->f_mapping->host);
ssize_t count = 0;
@@ -370,9 +382,17 @@
if (gfs_is_jdata(ip) ||
(gfs_is_stuffed(ip) && !test_bit(GIF_PAGED, &ip->i_flags)))
- count = do_read_readi(file, buf, size, offset);
- else
- count = generic_file_read(file, buf, size, offset);
+ count = do_read_readi(file, buf, size, offset, iocb);
+ else {
+ if (!iocb) {
+ count = do_sync_read(file, buf, size, offset);
+ } else {
+ struct iovec local_iov = { .iov_base = buf, .iov_len = size};
+
+ count = generic_file_aio_read(iocb, &local_iov, 1, *offset);
+ iocb->ki_pos = *offset;
+ }
+ }
gfs_glock_dq_m(num_gh + 1, ghs);
@@ -382,6 +402,18 @@
return (count) ? count : error;
}
+static ssize_t
+__gfs_read(struct file *file, char *buf, size_t size, loff_t *offset,
+ struct kiocb *iocb)
+{
+ atomic_inc(&get_v2sdp(file->f_mapping->host->i_sb)->sd_ops_file);
+
+ if (file->f_flags & O_DIRECT)
+ return walk_vm(file, buf, size, offset, iocb, do_read_direct);
+ else
+ return walk_vm(file, buf, size, offset, iocb, do_read_buf);
+}
+
/**
* gfs_read - Read bytes from a file
* @file: The file to read from
@@ -397,12 +429,21 @@
static ssize_t
gfs_read(struct file *file, char *buf, size_t size, loff_t *offset)
{
- atomic_inc(&get_v2sdp(file->f_mapping->host->i_sb)->sd_ops_file);
+ return(__gfs_read(file, buf, size, offset, NULL));
+}
- if (file->f_flags & O_DIRECT)
- return walk_vm(file, buf, size, offset, do_read_direct);
- else
- return walk_vm(file, buf, size, offset, do_read_buf);
+/*
+ * gfs_aio_read: match with vfs generic_file_aio_read as:
+ * (struct kiocb *iocb, char __user *buf, size_t count, loff_t pos)
+ */
+static ssize_t
+gfs_aio_read(struct kiocb *iocb, const struct iovec *iov, unsigned long count,
+ loff_t pos)
+{
+ struct file *filp = iocb->ki_filp;
+
+ BUG_ON(iocb->ki_pos != pos);
+ return(__gfs_read(filp, iov->iov_base, iov->iov_len, &iocb->ki_pos, iocb));
}
/**
@@ -437,6 +478,41 @@
}
/**
+ * gfs_file_aio_write_nolock - Call vfs aio layer to write bytes to a file
+ * @file: The file to write to
+ * @buf: The buffer to copy from
+ * @size: The amount of data requested
+ * @offset: The offset in the file to write
+ * @iocb: The io control block. If NULL, a temporary one will be used.
+ *
+ * Returns: The number of bytes written, errno on failure
+ */
+static ssize_t
+gfs_file_aio_write_nolock(struct file *file, char *buf, size_t size,
+ loff_t *offset, struct kiocb *iocb)
+{
+ struct iovec local_iov = { .iov_base = buf, .iov_len = size };
+ struct kiocb local_iocb, *kiocb = NULL;
+ ssize_t count;
+
+ if (!iocb) {
+ init_sync_kiocb(&local_iocb, file);
+ local_iocb.ki_nr_segs = 1;
+ kiocb = &local_iocb;
+ }
+ else
+ kiocb = iocb;
+
+ kiocb->ki_pos = *offset;
+ count = generic_file_aio_write_nolock(kiocb, &local_iov, kiocb->ki_nr_segs,
+ kiocb->ki_pos);
+ *offset = kiocb->ki_pos;
+ if (kiocb == &local_iocb && count == -EIOCBQUEUED)
+ count = wait_on_sync_kiocb(kiocb);
+ return count;
+}
+
+/**
* do_write_direct_alloc - Write bytes to a file
* @file: The file to write to
* @buf: The buffer to copy from
@@ -449,13 +525,13 @@
*/
static ssize_t
-do_write_direct_alloc(struct file *file, char *buf, size_t size, loff_t *offset)
+do_write_direct_alloc(struct file *file, char *buf, size_t size, loff_t *offset,
+ struct kiocb *iocb)
{
struct inode *inode = file->f_mapping->host;
struct gfs_inode *ip = get_v2ip(inode);
struct gfs_sbd *sdp = ip->i_sbd;
struct gfs_alloc *al = NULL;
- struct iovec local_iov = { .iov_base = buf, .iov_len = size };
struct buffer_head *dibh;
unsigned int data_blocks, ind_blocks;
ssize_t count;
@@ -508,7 +584,7 @@
goto fail_end_trans;
}
- count = generic_file_write_nolock(file, &local_iov, 1, offset);
+ count = gfs_file_aio_write_nolock(file, buf, size, offset, iocb);
if (count < 0) {
error = count;
goto fail_end_trans;
@@ -576,6 +652,7 @@
static ssize_t
do_write_direct(struct file *file, char *buf, size_t size, loff_t *offset,
+ struct kiocb *iocb,
unsigned int num_gh, struct gfs_holder *ghs)
{
struct gfs_inode *ip = get_v2ip(file->f_mapping->host);
@@ -646,13 +723,19 @@
if (alloc_required) {
set_bit(GFF_DID_DIRECT_ALLOC, &fp->f_flags);
+ /* for asynchronous IO, the buffer can not be splitted */
+ if (iocb) {
+ count = do_write_direct_alloc(file, buf, size, offset, iocb);
+ goto out_iocb_write;
+ }
+
/* split large writes into smaller atomic transactions */
while (size) {
s = gfs_tune_get(sdp, gt_max_atomic_write);
if (s > size)
s = size;
- error = do_write_direct_alloc(file, buf, s, offset);
+ error = do_write_direct_alloc(file, buf, s, offset, iocb);
if (error < 0)
goto out_gunlock;
@@ -661,7 +744,6 @@
count += error;
}
} else {
- struct iovec local_iov = { .iov_base = buf, .iov_len = size };
struct gfs_holder t_gh;
clear_bit(GFF_DID_DIRECT_ALLOC, &fp->f_flags);
@@ -670,17 +752,17 @@
if (error)
goto out_gunlock;
- count = generic_file_write_nolock(file, &local_iov, 1, offset);
-
+ count = gfs_file_aio_write_nolock(file, buf, size, offset, iocb);
gfs_glock_dq_uninit(&t_gh);
}
+out_iocb_write:
error = 0;
- out_gunlock:
+out_gunlock:
gfs_glock_dq_m(num_gh + 1, ghs);
- out:
+out:
gfs_holder_uninit(&ghs[num_gh]);
return (count) ? count : error;
@@ -699,7 +781,8 @@
*/
static ssize_t
-do_do_write_buf(struct file *file, char *buf, size_t size, loff_t *offset)
+do_do_write_buf(struct file *file, char *buf, size_t size, loff_t *offset,
+ struct kiocb *iocb)
{
struct inode *inode = file->f_mapping->host;
struct gfs_inode *ip = get_v2ip(inode);
@@ -777,7 +860,7 @@
(gfs_is_stuffed(ip) && !test_bit(GIF_PAGED, &ip->i_flags) &&
*offset + size <= sdp->sd_sb.sb_bsize - sizeof(struct gfs_dinode))) {
- count = gfs_writei(ip, buf, *offset, size, gfs_copy_from_user);
+ count = gfs_writei(ip, buf, *offset, size, gfs_copy_from_user, iocb);
if (count < 0) {
error = count;
goto fail_end_trans;
@@ -792,9 +875,7 @@
}
*offset += count;
} else {
- struct iovec local_iov = { .iov_base = buf, .iov_len = size };
-
- count = generic_file_write_nolock(file, &local_iov, 1, offset);
+ count = gfs_file_aio_write_nolock(file, buf, size, offset, iocb);
if (count < 0) {
error = count;
goto fail_end_trans;
@@ -869,8 +950,9 @@
static ssize_t
do_write_buf(struct file *file,
- char *buf, size_t size, loff_t *offset,
- unsigned int num_gh, struct gfs_holder *ghs)
+ char *buf, size_t size, loff_t *offset,
+ struct kiocb *iocb,
+ unsigned int num_gh, struct gfs_holder *ghs)
{
struct gfs_inode *ip = get_v2ip(file->f_mapping->host);
struct gfs_sbd *sdp = ip->i_sbd;
@@ -907,7 +989,7 @@
if (s > size)
s = size;
- error = do_do_write_buf(file, buf, s, offset);
+ error = do_do_write_buf(file, buf, s, offset, iocb);
if (error < 0)
goto out_gunlock;
@@ -940,7 +1022,7 @@
*/
static ssize_t
-gfs_write(struct file *file, const char *buf, size_t size, loff_t *offset)
+__gfs_write(struct file *file, const char *buf, size_t size, loff_t *offset, struct kiocb *iocb)
{
struct inode *inode = file->f_mapping->host;
ssize_t count;
@@ -954,14 +1036,32 @@
mutex_lock(&inode->i_mutex);
if (file->f_flags & O_DIRECT)
- count = walk_vm(file, (char *)buf, size, offset, do_write_direct);
+ count = walk_vm(file, (char *)buf, size, offset, iocb, do_write_direct);
else
- count = walk_vm(file, (char *)buf, size, offset, do_write_buf);
+ count = walk_vm(file, (char *)buf, size, offset, iocb, do_write_buf);
mutex_unlock(&inode->i_mutex);
return count;
}
+static ssize_t
+gfs_write(struct file *file, const char *buf, size_t size, loff_t *offset)
+{
+ return(__gfs_write(file, buf, size, offset, NULL));
+}
+
+static ssize_t
+gfs_aio_write(struct kiocb *iocb, const struct iovec *iov, unsigned long segs,
+ loff_t pos)
+{
+ struct file *file = iocb->ki_filp;
+
+ BUG_ON(iocb->ki_pos != pos);
+
+ return(__gfs_write(file, iov->iov_base, iov->iov_len, &iocb->ki_pos,
+ iocb));
+}
+
/**
* filldir_reg_func - Report a directory entry to the caller of gfs_dir_read()
* @opaque: opaque data used by the function
@@ -1647,6 +1747,8 @@
.llseek = gfs_llseek,
.read = gfs_read,
.write = gfs_write,
+ .aio_read = gfs_aio_read,
+ .aio_write = gfs_aio_write,
.ioctl = gfs_ioctl,
.mmap = gfs_mmap,
.open = gfs_open,
--- cluster/gfs-kernel/src/gfs/ops_fstype.c 2006/06/29 16:50:41 1.13.2.1.4.2.2.3
+++ cluster/gfs-kernel/src/gfs/ops_fstype.c 2007/02/07 15:25:05 1.13.2.1.4.2.2.4
@@ -2,7 +2,7 @@
*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
-** Copyright (C) 2004 Red Hat, Inc. All rights reserved.
+** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
@@ -29,6 +29,7 @@
#include "inode.h"
#include "lm.h"
#include "mount.h"
+#include "ops_dentry.h"
#include "ops_export.h"
#include "ops_fstype.h"
#include "ops_super.h"
@@ -492,6 +493,7 @@
error = -ENOMEM;
goto fail_li_free;
}
+ sb->s_root->d_op = &gfs_dops;
/* Start up the logd thread */
@@ -679,9 +681,8 @@
* Returns: the new superblock
*/
-struct super_block *
-gfs_get_sb(struct file_system_type *fs_type, int flags,
- const char *dev_name, void *data)
+static int gfs_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data, struct vfsmount *mnt)
{
struct block_device *real, *diaper;
struct super_block *sb;
@@ -689,17 +690,17 @@
real = open_bdev_excl(dev_name, flags, fs_type);
if (IS_ERR(real))
- return (struct super_block *)real;
+ return PTR_ERR(real);
diaper = gfs_diaper_get(real, flags);
if (IS_ERR(diaper)) {
close_bdev_excl(real);
- return (struct super_block *)diaper;
+ return PTR_ERR(diaper);
}
- mutex_lock(&diaper->bd_mount_mutex);
+ down(&diaper->bd_mount_sem);
sb = sget(fs_type, gfs_test_bdev_super, gfs_set_bdev_super, diaper);
- mutex_unlock(&diaper->bd_mount_mutex);
+ up(&diaper->bd_mount_sem);
if (IS_ERR(sb))
goto out;
@@ -723,14 +724,20 @@
sb = ERR_PTR(error);
} else
sb->s_flags |= MS_ACTIVE;
+ if (real->bd_disk) {
+ if (real->bd_part)
+ kobject_uevent(&real->bd_part->kobj, KOBJ_MOUNT);
+ else
+ kobject_uevent(&real->bd_disk->kobj, KOBJ_MOUNT);
+ }
}
- return sb;
+ return simple_set_mnt(mnt, sb);
out:
gfs_diaper_put(diaper);
close_bdev_excl(real);
- return sb;
+ return simple_set_mnt(mnt, sb);
}
/**
@@ -752,6 +759,13 @@
set_blocksize(diaper, bsize);
set_blocksize(real, bsize);
gfs_diaper_put(diaper);
+ if (real->bd_disk) {
+ if (real->bd_part)
+ kobject_uevent(&real->bd_part->kobj, KOBJ_UMOUNT);
+ else
+ kobject_uevent(&real->bd_disk->kobj, KOBJ_UMOUNT);
+ }
+ sync_blockdev(real);
close_bdev_excl(real);
}
--- cluster/gfs-kernel/src/gfs/ops_inode.c 2006/08/16 14:40:54 1.6.6.1.2.5
+++ cluster/gfs-kernel/src/gfs/ops_inode.c 2007/02/07 15:25:05 1.6.6.1.2.6
@@ -171,22 +171,22 @@
parent = dget_parent(dentry);
if (gfs_filecmp(&dentry->d_name, "@hostname", 9))
- new = lookup_one_len(system_utsname.nodename,
+ new = lookup_one_len(init_utsname()->nodename,
parent,
- strlen(system_utsname.nodename));
+ strlen(init_utsname()->nodename));
else if (gfs_filecmp(&dentry->d_name, "@nodeid", 7))
new = lookup_one_len(buf,
parent,
sprintf(buf, "%s%i", "node",
get_my_nodeid()));
else if (gfs_filecmp(&dentry->d_name, "@mach", 5))
- new = lookup_one_len(system_utsname.machine,
+ new = lookup_one_len(init_utsname()->machine,
parent,
- strlen(system_utsname.machine));
+ strlen(init_utsname()->machine));
else if (gfs_filecmp(&dentry->d_name, "@os", 3))
- new = lookup_one_len(system_utsname.sysname,
+ new = lookup_one_len(init_utsname()->sysname,
parent,
- strlen(system_utsname.sysname));
+ strlen(init_utsname()->sysname));
else if (gfs_filecmp(&dentry->d_name, "@uid", 4))
new = lookup_one_len(buf,
parent,
@@ -199,8 +199,8 @@
new = lookup_one_len(buf,
parent,
sprintf(buf, "%s_%s",
- system_utsname.machine,
- system_utsname.sysname));
+ init_utsname()->machine,
+ init_utsname()->sysname));
else if (gfs_filecmp(&dentry->d_name, "@jid", 4))
new = lookup_one_len(buf,
parent,
@@ -235,22 +235,22 @@
parent = dget_parent(dentry);
if (gfs_filecmp(&dentry->d_name, "{hostname}", 10))
- new = lookup_one_len(system_utsname.nodename,
+ new = lookup_one_len(init_utsname()->nodename,
parent,
- strlen(system_utsname.nodename));
+ strlen(init_utsname()->nodename));
else if (gfs_filecmp(&dentry->d_name, "{nodeid}", 8))
new = lookup_one_len(buf,
parent,
sprintf(buf, "%s%i", "node",
get_my_nodeid()));
else if (gfs_filecmp(&dentry->d_name, "{mach}", 6))
- new = lookup_one_len(system_utsname.machine,
+ new = lookup_one_len(init_utsname()->machine,
parent,
- strlen(system_utsname.machine));
+ strlen(init_utsname()->machine));
else if (gfs_filecmp(&dentry->d_name, "{os}", 4))
- new = lookup_one_len(system_utsname.sysname,
+ new = lookup_one_len(init_utsname()->sysname,
parent,
- strlen(system_utsname.sysname));
+ strlen(init_utsname()->sysname));
else if (gfs_filecmp(&dentry->d_name, "{uid}", 5))
new = lookup_one_len(buf,
parent,
@@ -263,8 +263,8 @@
new = lookup_one_len(buf,
parent,
sprintf(buf, "%s_%s",
- system_utsname.machine,
- system_utsname.sysname));
+ init_utsname()->machine,
+ init_utsname()->sysname));
else if (gfs_filecmp(&dentry->d_name, "{jid}", 5))
new = lookup_one_len(buf,
parent,
--- cluster/gfs-kernel/src/gfs/ops_super.c 2006/02/15 22:49:19 1.12.2.1.4.2.2.2
+++ cluster/gfs-kernel/src/gfs/ops_super.c 2007/02/07 15:25:05 1.12.2.1.4.2.2.3
@@ -275,8 +275,9 @@
*/
static int
-gfs_statfs(struct super_block *sb, struct kstatfs *buf)
+gfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
+ struct super_block *sb = dentry->d_inode->i_sb;
struct gfs_sbd *sdp = get_v2sdp(sb);
struct gfs_stat_gfs sg;
int error;
--- cluster/gfs-kernel/src/gfs/recovery.c 2006/02/15 22:46:43 1.5.8.1
+++ cluster/gfs-kernel/src/gfs/recovery.c 2007/02/07 15:25:05 1.5.8.2
@@ -548,7 +548,7 @@
}
/**
- * gfs_recover_journal - recovery a given journal
+ * gfs_recover_journal - recover a given journal
* @sdp: the filesystem
* @jid: the number of the journal to recover
* @jdesc: the struct gfs_jindex describing the journal
@@ -573,7 +573,7 @@
printk("GFS: fsid=%s: jid=%u: Trying to acquire journal lock...\n",
sdp->sd_fsname, jid);
- /* Aquire the journal lock so we can do recovery */
+ /* Acquire the journal lock so we can do recovery */
error = gfs_glock_nq_num(sdp,
jdesc->ji_addr, &gfs_meta_glops,
--- cluster/gfs-kernel/src/gfs/util.c 2005/03/22 15:54:09 1.9.2.1
+++ cluster/gfs-kernel/src/gfs/util.c 2007/02/07 15:25:05 1.9.2.1.6.1
@@ -26,10 +26,10 @@
uint32_t gfs_random_number;
-kmem_cache_t *gfs_glock_cachep = NULL;
-kmem_cache_t *gfs_inode_cachep = NULL;
-kmem_cache_t *gfs_bufdata_cachep = NULL;
-kmem_cache_t *gfs_mhc_cachep = NULL;
+struct kmem_cache *gfs_glock_cachep = NULL;
+struct kmem_cache *gfs_inode_cachep = NULL;
+struct kmem_cache *gfs_bufdata_cachep = NULL;
+struct kmem_cache *gfs_mhc_cachep = NULL;
/**
* gfs_random - Generate a random 32-bit number
--- cluster/gfs-kernel/src/gfs/util.h 2006/02/20 04:01:05 1.7.8.1
+++ cluster/gfs-kernel/src/gfs/util.h 2007/02/07 15:25:05 1.7.8.2
@@ -311,10 +311,10 @@
yield(); \
}
-extern kmem_cache_t *gfs_glock_cachep;
-extern kmem_cache_t *gfs_inode_cachep;
-extern kmem_cache_t *gfs_bufdata_cachep;
-extern kmem_cache_t *gfs_mhc_cachep;
+extern struct kmem_cache *gfs_glock_cachep;
+extern struct kmem_cache *gfs_inode_cachep;
+extern struct kmem_cache *gfs_bufdata_cachep;
+extern struct kmem_cache *gfs_mhc_cachep;
void *gmalloc(unsigned int size);
--- cluster/gfs-kernel/src/gulm/Attic/gulm.h 2005/06/01 19:11:58 1.11.6.1
+++ cluster/gfs-kernel/src/gulm/Attic/gulm.h 2007/02/07 15:25:05 1.11.6.1.2.1
@@ -24,7 +24,6 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <asm/atomic.h>
-#include <linux/config.h>
#include <linux/version.h>
#include <linux/smp_lock.h>
#include <linux/list.h>
@@ -73,7 +72,7 @@
/* Divide x by y. Round up if there is a remainder. */
#define DIV_RU(x, y) (((x) + (y) - 1) / (y))
-#include <linux/lm_interface.h>
+#include "lm_interface.h"
#include "gulm_prints.h"
--- cluster/gfs-kernel/src/gulm/Attic/gulm_fs.c 2005/03/04 20:08:00 1.15.2.1
+++ cluster/gfs-kernel/src/gulm/Attic/gulm_fs.c 2007/02/07 15:25:05 1.15.2.1.6.1
@@ -258,7 +258,7 @@
if (hostdata != NULL && strlen (hostdata) > 0) {
strncpy (gulm_cm.myName, hostdata, 64);
} else {
- strncpy (gulm_cm.myName, system_utsname.nodename, 64);
+ strncpy (gulm_cm.myName, init_utsname()->nodename, 64);
}
gulm_cm.myName[63] = '\0';
--- cluster/gfs-kernel/src/gulm/Attic/handler.h 2004/06/24 08:53:28 1.1
+++ cluster/gfs-kernel/src/gulm/Attic/handler.h 2007/02/07 15:25:05 1.1.8.1
@@ -13,7 +13,8 @@
#ifndef __handler_c__
#define __handler_c__
-#include <linux/lm_interface.h>
+
+#include "lm_interface.h"
struct callback_qu_s {
struct completion startup;
--- cluster/gfs-kernel/src/harness/Attic/main.c 2004/12/22 02:23:11 1.3
+++ cluster/gfs-kernel/src/harness/Attic/main.c 2007/02/07 15:25:05 1.3.8.1
@@ -19,7 +19,8 @@
#include <linux/sched.h>
#include <linux/kmod.h>
#include <linux/fs.h>
-#include <linux/lm_interface.h>
+
+#include "lm_interface.h"
#define RELEASE_NAME "<CVS>"
--- cluster/gfs-kernel/src/nolock/Attic/main.c 2006/06/26 21:27:43 1.4.6.2.2.1
+++ cluster/gfs-kernel/src/nolock/Attic/main.c 2007/02/07 15:25:05 1.4.6.2.2.2
@@ -18,7 +18,8 @@
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/smp_lock.h>
-#include <linux/lm_interface.h>
+
+#include "lm_interface.h"
#define RELEASE_NAME "<CVS>"
--- cluster/gnbd-kernel/src/gnbd.c 2006/07/12 17:34:29 1.6.6.1.2.4
+++ cluster/gnbd-kernel/src/gnbd.c 2007/02/07 15:25:05 1.6.6.1.2.5
@@ -30,12 +30,11 @@
#include <linux/buffer_head.h>
#include <linux/miscdevice.h>
#include <linux/moduleparam.h>
-#include <linux/devfs_fs_kernel.h>
#include <asm/uaccess.h>
#include <asm/types.h>
-#include <linux/gnbd.h>
+#include "gnbd.h"
static int major_nr = 0;
uint64_t insmod_time;
@@ -578,10 +577,10 @@
struct gnbd_device *dev;
blkdev_dequeue_request(req);
- dprintk(DBG_BLKDEV, "%s: request %p: dequeued (flags=%lx)\n",
- req->rq_disk->disk_name, req, req->flags);
+ dprintk(DBG_BLKDEV, "%s: request %p: dequeued (flags=%x)\n",
+ req->rq_disk->disk_name, req, req->cmd_type);
- if (!(req->flags & REQ_CMD))
+ if (!blk_fs_request(req))
goto error_out;
dev = req->rq_disk->private_data;
@@ -845,7 +844,6 @@
{
.minor = MISC_DYNAMIC_MINOR,
.name = "gnbd_ctl",
- .devfs_name = "gnbd_ctl",
.fops = &_gnbd_ctl_fops
};
@@ -890,12 +888,12 @@
printk(KERN_CRIT "gnbd: sizeof gnbd_request needs to be 28 in order to work!\n" );
return -EIO;
}
- shutdown_req.flags = REQ_SPECIAL;
+ shutdown_req.cmd_type = REQ_TYPE_SPECIAL;
gnbd_cmd(&shutdown_req) = GNBD_CMD_DISC;
shutdown_req.sector = 0;
shutdown_req.nr_sectors = 0;
- ping_req.flags = REQ_SPECIAL;
+ ping_req.cmd_type = REQ_TYPE_SPECIAL;
gnbd_cmd(&ping_req) = GNBD_CMD_PING;
ping_req.sector = 0;
ping_req.nr_sectors = 0;
@@ -926,7 +924,6 @@
printk(KERN_INFO "gnbd: registered device at major %d\n", major_nr);
dprintk(DBG_INIT, "gnbd: debugflags=0x%x\n", debugflags);
- devfs_mk_dir("gnbd_minor");
err = class_register(&gnbd_class);
if (err)
goto out_unregister;
@@ -982,7 +979,6 @@
disk->fops = &gnbd_fops;
disk->private_data = &gnbd_dev[i];
sprintf(disk->disk_name, "gnbd%d", i);
- sprintf(disk->devfs_name, "gnbd_minor/%d", i);
set_capacity(disk, 0);
add_disk(disk);
if(sysfs_create_link(&gnbd_dev[i].class_dev.kobj,
@@ -1036,7 +1032,6 @@
kfree(gnbd_dev[i].server_name);
}
class_unregister(&gnbd_class);
- devfs_remove("gnbd");
unregister_blkdev(major_nr, "gnbd");
printk(KERN_INFO "gnbd: unregistered device at major %d\n", major_nr);
}
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