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Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  coda: move backing-dev.h kernel include inside __KERNEL__
  mtd: ensure that bdi entries are properly initialized and registered
  Move mtd_bdi_*mappable to mtdcore.c
  btrfs: convert to using bdi_setup_and_register()
  Catch filesystems lacking s_bdi
  drbd: Terminate a connection early if sending the protocol fails
  drbd: fix memory leak
  Fix JFFS2 sync silent failure
  smbfs: add bdi backing to mount session
  ncpfs: add bdi backing to mount session
  exofs: add bdi backing to mount session
  ecryptfs: add bdi backing to mount session
  coda: add bdi backing to mount session
  cifs: add bdi backing to mount session
  afs: add bdi backing to mount session.
  9p: add bdi backing to mount session
  bdi: add helper function for doing init and register of a bdi for a file system
  block: ensure jiffies wrap is handled correctly in blk_rq_timed_out_timer
This commit is contained in:
Linus Torvalds 2010-04-28 07:56:05 -07:00
parent 696e65c360 33f60e9640
commit 970b06485f
32 changed files with 220 additions and 91 deletions
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12
block/blk-timeout.c
View File

@ -109,6 +109,7 @@ void blk_rq_timed_out_timer(unsigned long data)
struct request_queue *q = (struct request_queue *) data;
unsigned long flags, next = 0;
struct request *rq, *tmp;
int next_set = 0;
spin_lock_irqsave(q->queue_lock, flags);
@ -122,16 +123,13 @@ void blk_rq_timed_out_timer(unsigned long data)
if (blk_mark_rq_complete(rq))
continue;
blk_rq_timed_out(rq);
} else if (!next || time_after(next, rq->deadline))
} else if (!next_set || time_after(next, rq->deadline)) {
next = rq->deadline;
next_set = 1;
}
}
/*
* next can never be 0 here with the list non-empty, since we always
* bump ->deadline to 1 so we can detect if the timer was ever added
* or not. See comment in blk_add_timer()
*/
if (next)
if (next_set)
mod_timer(&q->timeout, round_jiffies_up(next));
spin_unlock_irqrestore(q->queue_lock, flags);

1
drivers/block/drbd/drbd_main.c
View File

@ -1695,6 +1695,7 @@ int drbd_send_protocol(struct drbd_conf *mdev)
cf |= CF_DRY_RUN;
else {
dev_err(DEV, "--dry-run is not supported by peer");
kfree(p);
return 0;
}
}

3
drivers/block/drbd/drbd_receiver.c
View File

@ -899,7 +899,8 @@ retry:
drbd_thread_start(&mdev->asender);
drbd_send_protocol(mdev);
if (!drbd_send_protocol(mdev))
return -1;
drbd_send_sync_param(mdev, &mdev->sync_conf);
drbd_send_sizes(mdev, 0);
drbd_send_uuids(mdev);

2
drivers/mtd/Makefile
View File

@ -4,7 +4,7 @@
# Core functionality.
obj-$(CONFIG_MTD) += mtd.o
mtd-y := mtdcore.o mtdsuper.o mtdbdi.o
mtd-y := mtdcore.o mtdsuper.o
mtd-$(CONFIG_MTD_PARTITIONS) += mtdpart.o
obj-$(CONFIG_MTD_CONCAT) += mtdconcat.o

17
drivers/mtd/internal.h
View File

@ -1,17 +0,0 @@
/* Internal MTD definitions
*
* Copyright © 2006 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
/*
* mtdbdi.c
*/
extern struct backing_dev_info mtd_bdi_unmappable;
extern struct backing_dev_info mtd_bdi_ro_mappable;
extern struct backing_dev_info mtd_bdi_rw_mappable;

43
drivers/mtd/mtdbdi.c
View File

@ -1,43 +0,0 @@
/* MTD backing device capabilities
*
* Copyright © 2006 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/backing-dev.h>
#include <linux/mtd/mtd.h>
#include "internal.h"
/*
* backing device capabilities for non-mappable devices (such as NAND flash)
* - permits private mappings, copies are taken of the data
*/
struct backing_dev_info mtd_bdi_unmappable = {
.capabilities = BDI_CAP_MAP_COPY,
};
/*
* backing device capabilities for R/O mappable devices (such as ROM)
* - permits private mappings, copies are taken of the data
* - permits non-writable shared mappings
*/
struct backing_dev_info mtd_bdi_ro_mappable = {
.capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT |
BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP),
};
/*
* backing device capabilities for writable mappable devices (such as RAM)
* - permits private mappings, copies are taken of the data
* - permits non-writable shared mappings
*/
struct backing_dev_info mtd_bdi_rw_mappable = {
.capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT |
BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP |
BDI_CAP_WRITE_MAP),
};

81
drivers/mtd/mtdcore.c
View File

@ -2,6 +2,9 @@
* Core registration and callback routines for MTD
* drivers and users.
*
* bdi bits are:
* Copyright © 2006 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#include <linux/module.h>
@ -16,11 +19,39 @@
#include <linux/init.h>
#include <linux/mtd/compatmac.h>
#include <linux/proc_fs.h>
#include <linux/backing-dev.h>
#include <linux/mtd/mtd.h>
#include "internal.h"
#include "mtdcore.h"
/*
* backing device capabilities for non-mappable devices (such as NAND flash)
* - permits private mappings, copies are taken of the data
*/
struct backing_dev_info mtd_bdi_unmappable = {
.capabilities = BDI_CAP_MAP_COPY,
};
/*
* backing device capabilities for R/O mappable devices (such as ROM)
* - permits private mappings, copies are taken of the data
* - permits non-writable shared mappings
*/
struct backing_dev_info mtd_bdi_ro_mappable = {
.capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT |
BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP),
};
/*
* backing device capabilities for writable mappable devices (such as RAM)
* - permits private mappings, copies are taken of the data
* - permits non-writable shared mappings
*/
struct backing_dev_info mtd_bdi_rw_mappable = {
.capabilities = (BDI_CAP_MAP_COPY | BDI_CAP_MAP_DIRECT |
BDI_CAP_EXEC_MAP | BDI_CAP_READ_MAP |
BDI_CAP_WRITE_MAP),
};
static int mtd_cls_suspend(struct device *dev, pm_message_t state);
static int mtd_cls_resume(struct device *dev);
@ -628,20 +659,55 @@ done:
/*====================================================================*/
/* Init code */
static int __init mtd_bdi_init(struct backing_dev_info *bdi, const char *name)
{
int ret;
ret = bdi_init(bdi);
if (!ret)
ret = bdi_register(bdi, NULL, name);
if (ret)
bdi_destroy(bdi);
return ret;
}
static int __init init_mtd(void)
{
int ret;
ret = class_register(&mtd_class);
if (ret) {
pr_err("Error registering mtd class: %d\n", ret);
return ret;
}
ret = class_register(&mtd_class);
if (ret)
goto err_reg;
ret = mtd_bdi_init(&mtd_bdi_unmappable, "mtd-unmap");
if (ret)
goto err_bdi1;
ret = mtd_bdi_init(&mtd_bdi_ro_mappable, "mtd-romap");
if (ret)
goto err_bdi2;
ret = mtd_bdi_init(&mtd_bdi_rw_mappable, "mtd-rwmap");
if (ret)
goto err_bdi3;
#ifdef CONFIG_PROC_FS
if ((proc_mtd = create_proc_entry( "mtd", 0, NULL )))
proc_mtd->read_proc = mtd_read_proc;
#endif /* CONFIG_PROC_FS */
return 0;
err_bdi3:
bdi_destroy(&mtd_bdi_ro_mappable);
err_bdi2:
bdi_destroy(&mtd_bdi_unmappable);
err_bdi1:
class_unregister(&mtd_class);
err_reg:
pr_err("Error registering mtd class or bdi: %d\n", ret);
return ret;
}
static void __exit cleanup_mtd(void)
@ -651,6 +717,9 @@ static void __exit cleanup_mtd(void)
remove_proc_entry( "mtd", NULL);
#endif /* CONFIG_PROC_FS */
class_unregister(&mtd_class);
bdi_destroy(&mtd_bdi_unmappable);
bdi_destroy(&mtd_bdi_ro_mappable);
bdi_destroy(&mtd_bdi_rw_mappable);
}
module_init(init_mtd);

2
drivers/mtd/mtdsuper.c
View File

@ -13,6 +13,7 @@
#include <linux/mtd/super.h>
#include <linux/namei.h>
#include <linux/ctype.h>
#include <linux/slab.h>
/*
* compare superblocks to see if they're equivalent
@ -44,6 +45,7 @@ static int get_sb_mtd_set(struct super_block *sb, void *_mtd)
sb->s_mtd = mtd;
sb->s_dev = MKDEV(MTD_BLOCK_MAJOR, mtd->index);
sb->s_bdi = mtd->backing_dev_info;
return 0;
}

10
fs/9p/v9fs.c
View File

@ -238,6 +238,13 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
return ERR_PTR(-ENOMEM);
}
rc = bdi_setup_and_register(&v9ses->bdi, "9p", BDI_CAP_MAP_COPY);
if (rc) {
__putname(v9ses->aname);
__putname(v9ses->uname);
return ERR_PTR(rc);
}
spin_lock(&v9fs_sessionlist_lock);
list_add(&v9ses->slist, &v9fs_sessionlist);
spin_unlock(&v9fs_sessionlist_lock);
@ -301,6 +308,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
return fid;
error:
bdi_destroy(&v9ses->bdi);
return ERR_PTR(retval);
}
@ -326,6 +334,8 @@ void v9fs_session_close(struct v9fs_session_info *v9ses)
__putname(v9ses->uname);
__putname(v9ses->aname);
bdi_destroy(&v9ses->bdi);
spin_lock(&v9fs_sessionlist_lock);
list_del(&v9ses->slist);
spin_unlock(&v9fs_sessionlist_lock);

2
fs/9p/v9fs.h
View File

@ -20,6 +20,7 @@
* Boston, MA 02111-1301 USA
*
*/
#include <linux/backing-dev.h>
/**
* enum p9_session_flags - option flags for each 9P session
@ -102,6 +103,7 @@ struct v9fs_session_info {
u32 uid; /* if ACCESS_SINGLE, the uid that has access */
struct p9_client *clnt; /* 9p client */
struct list_head slist; /* list of sessions registered with v9fs */
struct backing_dev_info bdi;
};
struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,

1
fs/9p/vfs_super.c
View File

@ -77,6 +77,7 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
sb->s_blocksize = 1 << sb->s_blocksize_bits;
sb->s_magic = V9FS_MAGIC;
sb->s_op = &v9fs_super_ops;
sb->s_bdi = &v9ses->bdi;
sb->s_flags = flags | MS_ACTIVE | MS_SYNCHRONOUS | MS_DIRSYNC |
MS_NOATIME;

2
fs/afs/internal.h
View File

@ -19,6 +19,7 @@
#include <linux/workqueue.h>
#include <linux/sched.h>
#include <linux/fscache.h>
#include <linux/backing-dev.h>
#include "afs.h"
#include "afs_vl.h"
@ -313,6 +314,7 @@ struct afs_volume {
unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */
struct afs_server *servers[8]; /* servers on which volume resides (ordered) */
struct rw_semaphore server_sem; /* lock for accessing current server */
struct backing_dev_info bdi;
};
/*

1
fs/afs/super.c
View File

@ -311,6 +311,7 @@ static int afs_fill_super(struct super_block *sb, void *data)
sb->s_magic = AFS_FS_MAGIC;
sb->s_op = &afs_super_ops;
sb->s_fs_info = as;
sb->s_bdi = &as->volume->bdi;
/* allocate the root inode and dentry */
fid.vid = as->volume->vid;

7
fs/afs/volume.c
View File

@ -106,6 +106,10 @@ struct afs_volume *afs_volume_lookup(struct afs_mount_params *params)
volume->cell = params->cell;
volume->vid = vlocation->vldb.vid[params->type];
ret = bdi_setup_and_register(&volume->bdi, "afs", BDI_CAP_MAP_COPY);
if (ret)
goto error_bdi;
init_rwsem(&volume->server_sem);
/* look up all the applicable server records */
@ -151,6 +155,8 @@ error:
return ERR_PTR(ret);
error_discard:
bdi_destroy(&volume->bdi);
error_bdi:
up_write(&params->cell->vl_sem);
for (loop = volume->nservers - 1; loop >= 0; loop--)
@ -200,6 +206,7 @@ void afs_put_volume(struct afs_volume *volume)
for (loop = volume->nservers - 1; loop >= 0; loop--)
afs_put_server(volume->servers[loop]);
bdi_destroy(&volume->bdi);
kfree(volume);
_leave(" [destroyed]");

12
fs/btrfs/disk-io.c
View File

@ -44,8 +44,6 @@ static struct extent_io_ops btree_extent_io_ops;
static void end_workqueue_fn(struct btrfs_work *work);
static void free_fs_root(struct btrfs_root *root);
static atomic_t btrfs_bdi_num = ATOMIC_INIT(0);
/*
* end_io_wq structs are used to do processing in task context when an IO is
* complete. This is used during reads to verify checksums, and it is used
@ -1375,19 +1373,11 @@ static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi)
{
int err;
bdi->name = "btrfs";
bdi->capabilities = BDI_CAP_MAP_COPY;
err = bdi_init(bdi);
err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY);
if (err)
return err;
err = bdi_register(bdi, NULL, "btrfs-%d",
atomic_inc_return(&btrfs_bdi_num));
if (err) {
bdi_destroy(bdi);
return err;
}
bdi->ra_pages = default_backing_dev_info.ra_pages;
bdi->unplug_io_fn = btrfs_unplug_io_fn;
bdi->unplug_io_data = info;

3
fs/cifs/cifs_fs_sb.h
View File

@ -18,6 +18,8 @@
#ifndef _CIFS_FS_SB_H
#define _CIFS_FS_SB_H
#include <linux/backing-dev.h>
#define CIFS_MOUNT_NO_PERM 1 /* do not do client vfs_perm check */
#define CIFS_MOUNT_SET_UID 2 /* set current's euid in create etc. */
#define CIFS_MOUNT_SERVER_INUM 4 /* inode numbers from uniqueid from server */
@ -50,5 +52,6 @@ struct cifs_sb_info {
#ifdef CONFIG_CIFS_DFS_UPCALL
char *mountdata; /* mount options received at mount time */
#endif
struct backing_dev_info bdi;
};
#endif /* _CIFS_FS_SB_H */

10
fs/cifs/cifsfs.c
View File

@ -103,6 +103,12 @@ cifs_read_super(struct super_block *sb, void *data,
if (cifs_sb == NULL)
return -ENOMEM;
rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
if (rc) {
kfree(cifs_sb);
return rc;
}
#ifdef CONFIG_CIFS_DFS_UPCALL
/* copy mount params to sb for use in submounts */
/* BB: should we move this after the mount so we
@ -115,6 +121,7 @@ cifs_read_super(struct super_block *sb, void *data,
int len = strlen(data);
cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
if (cifs_sb->mountdata == NULL) {
bdi_destroy(&cifs_sb->bdi);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
return -ENOMEM;
@ -135,6 +142,7 @@ cifs_read_super(struct super_block *sb, void *data,
sb->s_magic = CIFS_MAGIC_NUMBER;
sb->s_op = &cifs_super_ops;
sb->s_bdi = &cifs_sb->bdi;
/* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
sb->s_blocksize =
cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
@ -183,6 +191,7 @@ out_mount_failed:
}
#endif
unload_nls(cifs_sb->local_nls);
bdi_destroy(&cifs_sb->bdi);
kfree(cifs_sb);
}
return rc;
@ -214,6 +223,7 @@ cifs_put_super(struct super_block *sb)
#endif
unload_nls(cifs_sb->local_nls);
bdi_destroy(&cifs_sb->bdi);
kfree(cifs_sb);
unlock_kernel();

8
fs/coda/inode.c
View File

@ -167,6 +167,10 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
return -EBUSY;
}
error = bdi_setup_and_register(&vc->bdi, "coda", BDI_CAP_MAP_COPY);
if (error)
goto bdi_err;
vc->vc_sb = sb;
sb->s_fs_info = vc;
@ -175,6 +179,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
sb->s_blocksize_bits = 12;
sb->s_magic = CODA_SUPER_MAGIC;
sb->s_op = &coda_super_operations;
sb->s_bdi = &vc->bdi;
/* get root fid from Venus: this needs the root inode */
error = venus_rootfid(sb, &fid);
@ -200,6 +205,8 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
return 0;
error:
bdi_destroy(&vc->bdi);
bdi_err:
if (root)
iput(root);
if (vc)
@ -210,6 +217,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
static void coda_put_super(struct super_block *sb)
{
bdi_destroy(&coda_vcp(sb)->bdi);
coda_vcp(sb)->vc_sb = NULL;
sb->s_fs_info = NULL;

2
fs/ecryptfs/ecryptfs_kernel.h
View File

@ -35,6 +35,7 @@
#include <linux/scatterlist.h>
#include <linux/hash.h>
#include <linux/nsproxy.h>
#include <linux/backing-dev.h>
/* Version verification for shared data structures w/ userspace */
#define ECRYPTFS_VERSION_MAJOR 0x00
@ -393,6 +394,7 @@ struct ecryptfs_mount_crypt_stat {
struct ecryptfs_sb_info {
struct super_block *wsi_sb;
struct ecryptfs_mount_crypt_stat mount_crypt_stat;
struct backing_dev_info bdi;
};
/* file private data. */

10
fs/ecryptfs/main.c
View File

@ -497,17 +497,25 @@ struct kmem_cache *ecryptfs_sb_info_cache;
static int
ecryptfs_fill_super(struct super_block *sb, void *raw_data, int silent)
{
struct ecryptfs_sb_info *esi;
int rc = 0;
/* Released in ecryptfs_put_super() */
ecryptfs_set_superblock_private(sb,
kmem_cache_zalloc(ecryptfs_sb_info_cache,
GFP_KERNEL));
if (!ecryptfs_superblock_to_private(sb)) {
esi = ecryptfs_superblock_to_private(sb);
if (!esi) {
ecryptfs_printk(KERN_WARNING, "Out of memory\n");
rc = -ENOMEM;
goto out;
}
rc = bdi_setup_and_register(&esi->bdi, "ecryptfs", BDI_CAP_MAP_COPY);
if (rc)
goto out;
sb->s_bdi = &esi->bdi;
sb->s_op = &ecryptfs_sops;
/* Released through deactivate_super(sb) from get_sb_nodev */
sb->s_root = d_alloc(NULL, &(const struct qstr) {

1
fs/ecryptfs/super.c
View File

@ -122,6 +122,7 @@ static void ecryptfs_put_super(struct super_block *sb)
lock_kernel();
ecryptfs_destroy_mount_crypt_stat(&sb_info->mount_crypt_stat);
bdi_destroy(&sb_info->bdi);
kmem_cache_free(ecryptfs_sb_info_cache, sb_info);
ecryptfs_set_superblock_private(sb, NULL);

2
fs/exofs/exofs.h
View File

@ -35,6 +35,7 @@
#include <linux/fs.h>
#include <linux/time.h>
#include <linux/backing-dev.h>
#include "common.h"
/* FIXME: Remove once pnfs hits mainline
@ -92,6 +93,7 @@ struct exofs_sb_info {
struct exofs_layout layout; /* Default files layout,
* contains the variable osd_dev
* array. Keep last */
struct backing_dev_info bdi;
struct osd_dev *_min_one_dev[1]; /* Place holder for one dev */
};

8
fs/exofs/super.c
View File

@ -302,6 +302,7 @@ static void exofs_put_super(struct super_block *sb)
_exofs_print_device("Unmounting", NULL, sbi->layout.s_ods[0],
sbi->layout.s_pid);
bdi_destroy(&sbi->bdi);
exofs_free_sbi(sbi);
sb->s_fs_info = NULL;
}
@ -546,6 +547,10 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
if (!sbi)
return -ENOMEM;
ret = bdi_setup_and_register(&sbi->bdi, "exofs", BDI_CAP_MAP_COPY);
if (ret)
goto free_bdi;
/* use mount options to fill superblock */
od = osduld_path_lookup(opts->dev_name);
if (IS_ERR(od)) {
@ -612,6 +617,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
}
/* set up operation vectors */
sb->s_bdi = &sbi->bdi;
sb->s_fs_info = sbi;
sb->s_op = &exofs_sops;
sb->s_export_op = &exofs_export_ops;
@ -643,6 +649,8 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
return 0;
free_sbi:
bdi_destroy(&sbi->bdi);
free_bdi:
EXOFS_ERR("Unable to mount exofs on %s pid=0x%llx err=%d\n",
opts->dev_name, sbi->layout.s_pid, ret);
exofs_free_sbi(sbi);

8
fs/ncpfs/inode.c
View File

@ -526,10 +526,15 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
sb->s_blocksize_bits = 10;
sb->s_magic = NCP_SUPER_MAGIC;
sb->s_op = &ncp_sops;
sb->s_bdi = &server->bdi;
server = NCP_SBP(sb);
memset(server, 0, sizeof(*server));
error = bdi_setup_and_register(&server->bdi, "ncpfs", BDI_CAP_MAP_COPY);
if (error)
goto out_bdi;
server->ncp_filp = ncp_filp;
server->ncp_sock = sock;
@ -719,6 +724,8 @@ out_fput2:
if (server->info_filp)
fput(server->info_filp);
out_fput:
bdi_destroy(&server->bdi);
out_bdi:
/* 23/12/1998 Marcin Dalecki <dalecki@cs.net.pl>:
*
* The previously used put_filp(ncp_filp); was bogous, since
@ -756,6 +763,7 @@ static void ncp_put_super(struct super_block *sb)
kill_pid(server->m.wdog_pid, SIGTERM, 1);
put_pid(server->m.wdog_pid);
bdi_destroy(&server->bdi);
kfree(server->priv.data);
kfree(server->auth.object_name);
vfree(server->rxbuf);

8
fs/smbfs/inode.c
View File

@ -479,6 +479,7 @@ smb_put_super(struct super_block *sb)
if (server->conn_pid)
kill_pid(server->conn_pid, SIGTERM, 1);
bdi_destroy(&server->bdi);
kfree(server->ops);
smb_unload_nls(server);
sb->s_fs_info = NULL;
@ -525,6 +526,11 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
if (!server)
goto out_no_server;
sb->s_fs_info = server;
if (bdi_setup_and_register(&server->bdi, "smbfs", BDI_CAP_MAP_COPY))
goto out_bdi;
sb->s_bdi = &server->bdi;
server->super_block = sb;
server->mnt = NULL;
@ -624,6 +630,8 @@ out_no_smbiod:
out_bad_option:
kfree(mem);
out_no_mem:
bdi_destroy(&server->bdi);
out_bdi:
if (!server->mnt)
printk(KERN_ERR "smb_fill_super: allocation failure\n");
sb->s_fs_info = NULL;

8
fs/super.c
View File

@ -693,6 +693,7 @@ int set_anon_super(struct super_block *s, void *data)
return -EMFILE;
}
s->s_dev = MKDEV(0, dev & MINORMASK);
s->s_bdi = &noop_backing_dev_info;
return 0;
}
@ -954,10 +955,11 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
if (error < 0)
goto out_free_secdata;
BUG_ON(!mnt->mnt_sb);
WARN_ON(!mnt->mnt_sb->s_bdi);
error = security_sb_kern_mount(mnt->mnt_sb, flags, secdata);
if (error)
goto out_sb;
error = security_sb_kern_mount(mnt->mnt_sb, flags, secdata);
if (error)
goto out_sb;
/*
* filesystems should never set s_maxbytes larger than MAX_LFS_FILESIZE

3
fs/sync.c
View File

@ -14,6 +14,7 @@
#include <linux/pagemap.h>
#include <linux/quotaops.h>
#include <linux/buffer_head.h>
#include <linux/backing-dev.h>
#include "internal.h"
#define VALID_FLAGS (SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE| \
@ -32,7 +33,7 @@ static int __sync_filesystem(struct super_block *sb, int wait)
* This should be safe, as we require bdi backing to actually
* write out data in the first place
*/
if (!sb->s_bdi)
if (!sb->s_bdi || sb->s_bdi == &noop_backing_dev_info)
return 0;
if (sb->s_qcop && sb->s_qcop->quota_sync)

2
include/linux/backing-dev.h
View File

@ -101,6 +101,7 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent,
const char *fmt, ...);
int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev);
void bdi_unregister(struct backing_dev_info *bdi);
int bdi_setup_and_register(struct backing_dev_info *, char *, unsigned int);
void bdi_start_writeback(struct backing_dev_info *bdi, struct super_block *sb,
long nr_pages);
int bdi_writeback_task(struct bdi_writeback *wb);
@ -246,6 +247,7 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio);
#endif
extern struct backing_dev_info default_backing_dev_info;
extern struct backing_dev_info noop_backing_dev_info;
void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page);
int writeback_in_progress(struct backing_dev_info *bdi);

3
include/linux/coda_psdev.h
View File

@ -7,6 +7,8 @@
#define MAX_CODADEVS 5 /* how many do we allow */
#ifdef __KERNEL__
#include <linux/backing-dev.h>
struct kstatfs;
/* communication pending/processing queues */
@ -17,6 +19,7 @@ struct venus_comm {
struct list_head vc_processing;
int vc_inuse;
struct super_block *vc_sb;
struct backing_dev_info bdi;
};

2
include/linux/ncp_fs_sb.h
View File

@ -12,6 +12,7 @@
#include <linux/ncp_mount.h>
#include <linux/net.h>
#include <linux/mutex.h>
#include <linux/backing-dev.h>
#ifdef __KERNEL__
@ -127,6 +128,7 @@ struct ncp_server {
size_t len;
__u8 data[128];
} unexpected_packet;
struct backing_dev_info bdi;
};
extern void ncp_tcp_rcv_proc(struct work_struct *work);

3
include/linux/smb_fs_sb.h
View File

@ -10,6 +10,7 @@
#define _SMB_FS_SB
#include <linux/types.h>
#include <linux/backing-dev.h>
#include <linux/smb.h>
/*
@ -74,6 +75,8 @@ struct smb_sb_info {
struct smb_ops *ops;
struct super_block *super_block;
struct backing_dev_info bdi;
};
static inline int

34
mm/backing-dev.c
View File

@ -11,6 +11,8 @@
#include <linux/writeback.h>
#include <linux/device.h>
static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
{
}
@ -25,6 +27,11 @@ struct backing_dev_info default_backing_dev_info = {
};
EXPORT_SYMBOL_GPL(default_backing_dev_info);
struct backing_dev_info noop_backing_dev_info = {
.name = "noop",
};
EXPORT_SYMBOL_GPL(noop_backing_dev_info);
static struct class *bdi_class;
/*
@ -715,6 +722,33 @@ void bdi_destroy(struct backing_dev_info *bdi)
}
EXPORT_SYMBOL(bdi_destroy);
/*
* For use from filesystems to quickly init and register a bdi associated
* with dirty writeback
*/
int bdi_setup_and_register(struct backing_dev_info *bdi, char *name,
unsigned int cap)
{
char tmp[32];
int err;
bdi->name = name;
bdi->capabilities = cap;
err = bdi_init(bdi);
if (err)
return err;
sprintf(tmp, "%.28s%s", name, "-%d");
err = bdi_register(bdi, NULL, tmp, atomic_long_inc_return(&bdi_seq));
if (err) {
bdi_destroy(bdi);
return err;
}
return 0;
}
EXPORT_SYMBOL(bdi_setup_and_register);
static wait_queue_head_t congestion_wqh[2] = {
__WAIT_QUEUE_HEAD_INITIALIZER(congestion_wqh[0]),
__WAIT_QUEUE_HEAD_INITIALIZER(congestion_wqh[1])