[PATCH] Shift BKL into ->statfs()

Paul Menage (pmenage@ensim.com)
Tue, 02 Jul 2002 18:25:47 -0700

This patch removes BKL protection from the invocation of the
super_operations ->statfs() method, and shifts it into the filesystems
where necessary. Any out-of-tree filesystems may need to take the BKL in
their statfs() methods if they were relying on it for synchronisation.

All ->statfs() implementations have been modified to take the BKL,
except for the following, which don't reference any external mutable
data:

simple_statfs
isofs_statfs
ncp_statfs
cramfs_statfs
romfs_statfs

Additionally, capifs is changed to use simple_statfs rather than its
own home-grown version.

All modified filesystems have been compiled except for the disabled
umsdos; only ext2 and shmfs have actually been tested.

Paul

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/Documentation/filesystems/Locking linux-2.5.24-statfs/Documentation/filesystems/Locking
--- linux-2.5.24/Documentation/filesystems/Locking Tue Jun 18 19:11:52 2002
+++ linux-2.5.24-statfs/Documentation/filesystems/Locking Wed Jun 26 01:41:08 2002
@@ -108,7 +108,7 @@
clear_inode: no
put_super: yes yes maybe (see below)
write_super: no yes maybe (see below)
-statfs: yes no no
+statfs: no no no
remount_fs: yes yes maybe (see below)
umount_begin: yes no maybe (see below)

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/Documentation/filesystems/porting linux-2.5.24-statfs/Documentation/filesystems/porting
--- linux-2.5.24/Documentation/filesystems/porting Tue Jun 18 19:11:51 2002
+++ linux-2.5.24-statfs/Documentation/filesystems/porting Wed Jun 26 01:41:08 2002
@@ -91,9 +91,10 @@
---
[mandatory]

-BKL is also moved from around sb operations. ->write_super() Is now called
-without BKL held. BKL should have been shifted into individual fs sb_op
-functions. If you don't need it, remove it.
+BKL is also moved from around sb operations. ->write_super() and
+->statfs() are now called without BKL held. BKL should have been
+shifted into individual fs sb_op functions. If you don't need it,
+remove it.

---
[informational]
diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/drivers/isdn/capi/capifs.c linux-2.5.24-statfs/drivers/isdn/capi/capifs.c
--- linux-2.5.24/drivers/isdn/capi/capifs.c Tue Jun 18 19:11:50 2002
+++ linux-2.5.24-statfs/drivers/isdn/capi/capifs.c Wed Jun 26 01:41:08 2002
@@ -221,11 +221,9 @@
kfree(sbi);
}

-static int capifs_statfs(struct super_block *sb, struct statfs *buf);
-
static struct super_operations capifs_sops = {
put_super: capifs_put_super,
- statfs: capifs_statfs,
+ statfs: simple_statfs,
};

static int capifs_parse_options(char *options, struct capifs_sb_info *sbi)
@@ -354,19 +352,6 @@
return -EINVAL;
}

-static int capifs_statfs(struct super_block *sb, struct statfs *buf)
-{
- buf->f_type = CAPIFS_SUPER_MAGIC;
- buf->f_bsize = 1024;
- buf->f_blocks = 0;
- buf->f_bfree = 0;
- buf->f_bavail = 0;
- buf->f_files = 0;
- buf->f_ffree = 0;
- buf->f_namelen = NAME_MAX;
- return 0;
-}
-
static struct inode *capifs_new_inode(struct super_block *sb)
{
struct inode *inode = new_inode(sb);
diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/adfs/super.c linux-2.5.24-statfs/fs/adfs/super.c
--- linux-2.5.24/fs/adfs/super.c Tue Jun 18 19:11:45 2002
+++ linux-2.5.24-statfs/fs/adfs/super.c Wed Jun 26 01:41:08 2002
@@ -18,6 +18,7 @@
#include <linux/string.h>
#include <linux/init.h>
#include <linux/buffer_head.h>
+#include <linux/smp_lock.h>

#include <asm/bitops.h>
#include <asm/uaccess.h>
@@ -192,6 +193,8 @@
{
struct adfs_sb_info *asb = ADFS_SB(sb);

+ lock_kernel();
+
buf->f_type = ADFS_SUPER_MAGIC;
buf->f_namelen = asb->s_namelen;
buf->f_bsize = sb->s_blocksize;
@@ -201,6 +204,8 @@
buf->f_bfree = adfs_map_free(sb);
buf->f_ffree = buf->f_bfree * buf->f_files / buf->f_blocks;

+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/affs/super.c linux-2.5.24-statfs/fs/affs/super.c
--- linux-2.5.24/fs/affs/super.c Tue Jun 18 19:11:57 2002
+++ linux-2.5.24-statfs/fs/affs/super.c Wed Jun 26 01:41:08 2002
@@ -531,6 +531,8 @@
{
int free;

+ lock_kernel();
+
pr_debug("AFFS: statfs() partsize=%d, reserved=%d\n",AFFS_SB(sb)->s_partition_size,
AFFS_SB(sb)->s_reserved);

@@ -540,6 +542,9 @@
buf->f_blocks = AFFS_SB(sb)->s_partition_size - AFFS_SB(sb)->s_reserved;
buf->f_bfree = free;
buf->f_bavail = free;
+
+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/bfs/inode.c linux-2.5.24-statfs/fs/bfs/inode.c
--- linux-2.5.24/fs/bfs/inode.c Tue Jun 18 19:11:53 2002
+++ linux-2.5.24-statfs/fs/bfs/inode.c Wed Jun 26 01:41:08 2002
@@ -190,6 +190,9 @@
static int bfs_statfs(struct super_block *s, struct statfs *buf)
{
struct bfs_sb_info *info = BFS_SB(s);
+
+ lock_kernel();
+
buf->f_type = BFS_MAGIC;
buf->f_bsize = s->s_blocksize;
buf->f_blocks = info->si_blocks;
@@ -198,6 +201,9 @@
buf->f_ffree = info->si_freei;
buf->f_fsid.val[0] = s->s_dev;
buf->f_namelen = BFS_NAMELEN;
+
+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/coda/inode.c linux-2.5.24-statfs/fs/coda/inode.c
--- linux-2.5.24/fs/coda/inode.c Tue Jun 18 19:11:55 2002
+++ linux-2.5.24-statfs/fs/coda/inode.c Wed Jun 26 01:41:08 2002
@@ -281,9 +281,13 @@
static int coda_statfs(struct super_block *sb, struct statfs *buf)
{
int error;
+
+ lock_kernel();

error = venus_statfs(sb, buf);

+ unlock_kernel();
+
if (error) {
/* fake something like AFS does */
buf->f_blocks = 9000000;
diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/efs/super.c linux-2.5.24-statfs/fs/efs/super.c
--- linux-2.5.24/fs/efs/super.c Tue Jun 18 19:11:50 2002
+++ linux-2.5.24-statfs/fs/efs/super.c Wed Jun 26 01:41:08 2002
@@ -13,6 +13,7 @@
#include <linux/efs_fs_sb.h>
#include <linux/slab.h>
#include <linux/buffer_head.h>
+#include <linux/smp_lock.h>

static struct super_block *efs_get_sb(struct file_system_type *fs_type,
int flags, char *dev_name, void *data)
@@ -280,6 +281,8 @@
int efs_statfs(struct super_block *s, struct statfs *buf) {
struct efs_sb_info *sb = SUPER_INFO(s);

+ lock_kernel();
+
buf->f_type = EFS_SUPER_MAGIC; /* efs magic number */
buf->f_bsize = EFS_BLOCKSIZE; /* blocksize */
buf->f_blocks = sb->total_groups * /* total data blocks */
@@ -294,6 +297,8 @@
buf->f_fsid.val[1] = sb->fs_magic & 0xffff; /* fs ID */
buf->f_namelen = EFS_MAXNAMELEN; /* max filename length */

+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/ext2/super.c linux-2.5.24-statfs/fs/ext2/super.c
--- linux-2.5.24/fs/ext2/super.c Wed Jun 26 01:07:20 2002
+++ linux-2.5.24-statfs/fs/ext2/super.c Wed Jun 26 01:41:08 2002
@@ -835,6 +835,8 @@
unsigned long overhead;
int i;

+ lock_kernel();
+
if (test_opt (sb, MINIX_DF))
overhead = 0;
else {
@@ -875,6 +877,9 @@
buf->f_files = le32_to_cpu(sbi->s_es->s_inodes_count);
buf->f_ffree = ext2_count_free_inodes (sb);
buf->f_namelen = EXT2_NAME_LEN;
+
+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/ext3/super.c linux-2.5.24-statfs/fs/ext3/super.c
--- linux-2.5.24/fs/ext3/super.c Tue Jun 18 19:11:58 2002
+++ linux-2.5.24-statfs/fs/ext3/super.c Wed Jun 26 01:41:08 2002
@@ -504,7 +504,7 @@
write_super: ext3_write_super, /* BKL not held. We take it. Needed? */
write_super_lockfs: ext3_write_super_lockfs, /* BKL not held. Take it */
unlockfs: ext3_unlockfs, /* BKL not held. We take it */
- statfs: ext3_statfs, /* BKL held */
+ statfs: ext3_statfs, /* BKL not held. We take it. Needed? */
remount_fs: ext3_remount, /* BKL held */
};

@@ -1732,6 +1732,8 @@
unsigned long overhead;
int i;

+ lock_kernel();
+
if (test_opt (sb, MINIX_DF))
overhead = 0;
else {
@@ -1772,6 +1774,8 @@
buf->f_files = le32_to_cpu(es->s_inodes_count);
buf->f_ffree = ext3_count_free_inodes (sb);
buf->f_namelen = EXT3_NAME_LEN;
+
+ unlock_kernel();
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/fat/inode.c linux-2.5.24-statfs/fs/fat/inode.c
--- linux-2.5.24/fs/fat/inode.c Tue Jun 18 19:11:54 2002
+++ linux-2.5.24-statfs/fs/fat/inode.c Wed Jun 26 01:41:08 2002
@@ -934,11 +934,15 @@
int fat_statfs(struct super_block *sb,struct statfs *buf)
{
int free,nr;
-
+ int ret = 0;
+
+ lock_kernel();
if (MSDOS_SB(sb)->cvf_format &&
- MSDOS_SB(sb)->cvf_format->cvf_statfs)
- return MSDOS_SB(sb)->cvf_format->cvf_statfs(sb,buf,
+ MSDOS_SB(sb)->cvf_format->cvf_statfs) {
+ ret = MSDOS_SB(sb)->cvf_format->cvf_statfs(sb,buf,
sizeof(struct statfs));
+ goto out;
+ }

lock_fat(sb);
if (MSDOS_SB(sb)->free_clusters != -1)
@@ -959,7 +963,9 @@
buf->f_bavail = free;
buf->f_namelen = MSDOS_SB(sb)->options.isvfat ? 260 : 12;

- return 0;
+ out:
+ unlock_kernel();
+ return ret;
}

static int is_exec(char *extension)
diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/freevxfs/vxfs_super.c linux-2.5.24-statfs/fs/freevxfs/vxfs_super.c
--- linux-2.5.24/fs/freevxfs/vxfs_super.c Tue Jun 18 19:11:51 2002
+++ linux-2.5.24-statfs/fs/freevxfs/vxfs_super.c Wed Jun 26 01:41:08 2002
@@ -41,6 +41,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/stat.h>
+#include <linux/smp_lock.h>

#include "vxfs.h"
#include "vxfs_extern.h"
@@ -98,7 +99,7 @@
* Zero.
*
* Locking:
- * We are under bkl and @sbp->s_lock.
+ * We are under @sbp->s_lock.
*
* Notes:
* This is everything but complete...
@@ -108,6 +109,8 @@
{
struct vxfs_sb_info *infp = VXFS_SBI(sbp);

+ lock_kernel();
+
bufp->f_type = VXFS_SUPER_MAGIC;
bufp->f_bsize = sbp->s_blocksize;
bufp->f_blocks = infp->vsi_raw->vs_dsize;
@@ -117,6 +120,8 @@
bufp->f_ffree = infp->vsi_raw->vs_ifree;
bufp->f_namelen = VXFS_NAMELEN;

+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/hfs/super.c linux-2.5.24-statfs/fs/hfs/super.c
--- linux-2.5.24/fs/hfs/super.c Tue Jun 18 19:11:52 2002
+++ linux-2.5.24-statfs/fs/hfs/super.c Wed Jun 26 01:41:08 2002
@@ -198,6 +198,8 @@
{
struct hfs_mdb *mdb = HFS_SB(sb)->s_mdb;

+ lock_kernel();
+
buf->f_type = HFS_SUPER_MAGIC;
buf->f_bsize = HFS_SECTOR_SIZE;
buf->f_blocks = mdb->alloc_blksz * mdb->fs_ablocks;
@@ -207,6 +209,8 @@
buf->f_ffree = mdb->free_ablocks;
buf->f_namelen = HFS_NAMELEN;

+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/hpfs/super.c linux-2.5.24-statfs/fs/hpfs/super.c
--- linux-2.5.24/fs/hpfs/super.c Tue Jun 18 19:11:56 2002
+++ linux-2.5.24-statfs/fs/hpfs/super.c Tue Jul 2 16:51:50 2002
@@ -134,6 +134,8 @@

int hpfs_statfs(struct super_block *s, struct statfs *buf)
{
+ lock_kernel();
+
/*if (s->s_hpfs_n_free == -1) {*/
s->s_hpfs_n_free = count_bitmaps(s);
s->s_hpfs_n_free_dnodes = hpfs_count_one_bitmap(s, s->s_hpfs_dmap);
@@ -146,6 +148,8 @@
buf->f_files = s->s_hpfs_dirband_size / 4;
buf->f_ffree = s->s_hpfs_n_free_dnodes;
buf->f_namelen = 254;
+
+ unlock_kernel();
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/jffs/inode-v23.c linux-2.5.24-statfs/fs/jffs/inode-v23.c
--- linux-2.5.24/fs/jffs/inode-v23.c Tue Jun 18 19:11:56 2002
+++ linux-2.5.24-statfs/fs/jffs/inode-v23.c Wed Jun 26 01:41:08 2002
@@ -383,7 +383,11 @@
jffs_statfs(struct super_block *sb, struct statfs *buf)
{
struct jffs_control *c = (struct jffs_control *) sb->u.generic_sbp;
- struct jffs_fmcontrol *fmc = c->fmc;
+ struct jffs_fmcontrol *fmc;
+
+ lock_kernel();
+
+ fmc = c->fmc;

D2(printk("jffs_statfs()\n"));

@@ -401,6 +405,9 @@
buf->f_ffree = buf->f_bfree;
/* buf->f_fsid = 0; */
buf->f_namelen = JFFS_MAX_NAME_LEN;
+
+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/jffs2/fs.c linux-2.5.24-statfs/fs/jffs2/fs.c
--- linux-2.5.24/fs/jffs2/fs.c Tue Jun 18 19:11:53 2002
+++ linux-2.5.24-statfs/fs/jffs2/fs.c Wed Jun 26 01:41:08 2002
@@ -52,6 +52,8 @@
struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
unsigned long avail;

+ lock_kernel();
+
buf->f_type = JFFS2_SUPER_MAGIC;
buf->f_bsize = 1 << PAGE_SHIFT;
buf->f_blocks = c->flash_size >> PAGE_SHIFT;
@@ -184,6 +186,7 @@

spin_unlock_bh(&c->erase_completion_lock);

+ unlock_kernel();

return 0;
}
diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/jfs/super.c linux-2.5.24-statfs/fs/jfs/super.c
--- linux-2.5.24/fs/jfs/super.c Wed Jun 26 01:07:20 2002
+++ linux-2.5.24-statfs/fs/jfs/super.c Wed Jun 26 01:41:08 2002
@@ -21,6 +21,7 @@
#include <linux/config.h>
#include <linux/module.h>
#include <linux/completion.h>
+#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include "jfs_incore.h"
#include "jfs_filsys.h"
@@ -96,7 +97,11 @@
{
struct jfs_sb_info *sbi = JFS_SBI(sb);
s64 maxinodes;
- imap_t *imap = JFS_IP(sbi->ipimap)->i_imap;
+ imap_t *imap;
+
+ lock_kernel();
+
+ imap = JFS_IP(sbi->ipimap)->i_imap;

jFYI(1, ("In jfs_statfs\n"));
buf->f_type = JFS_SUPER_MAGIC;
@@ -121,6 +126,9 @@
atomic_read(&imap->im_numfree));

buf->f_namelen = JFS_NAME_MAX;
+
+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/minix/inode.c linux-2.5.24-statfs/fs/minix/inode.c
--- linux-2.5.24/fs/minix/inode.c Tue Jun 18 19:11:55 2002
+++ linux-2.5.24-statfs/fs/minix/inode.c Wed Jun 26 01:41:08 2002
@@ -15,6 +15,7 @@
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/highuid.h>
+#include <linux/smp_lock.h>

static void minix_read_inode(struct inode * inode);
static void minix_write_inode(struct inode * inode, int wait);
@@ -296,6 +297,9 @@
static int minix_statfs(struct super_block *sb, struct statfs *buf)
{
struct minix_sb_info *sbi = minix_sb(sb);
+
+ lock_kernel();
+
buf->f_type = sb->s_magic;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = (sbi->s_nzones - sbi->s_firstdatazone) << sbi->s_log_zone_size;
@@ -304,6 +308,9 @@
buf->f_files = sbi->s_ninodes;
buf->f_ffree = minix_count_free_inodes(sbi);
buf->f_namelen = sbi->s_namelen;
+
+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/nfs/inode.c linux-2.5.24-statfs/fs/nfs/inode.c
--- linux-2.5.24/fs/nfs/inode.c Tue Jun 18 19:11:57 2002
+++ linux-2.5.24-statfs/fs/nfs/inode.c Wed Jun 26 01:41:08 2002
@@ -474,6 +474,8 @@
struct nfs_fsinfo res;
int error;

+ lock_kernel();
+
error = server->rpc_ops->statfs(server, NFS_FH(sb->s_root->d_inode), &res);
buf->f_type = NFS_SUPER_MAGIC;
if (error < 0)
@@ -491,11 +493,16 @@
if (res.namelen == 0 || res.namelen > server->namelen)
res.namelen = server->namelen;
buf->f_namelen = res.namelen;
+
+ out:
+ unlock_kernel();
return 0;
+
out_err:
- printk("nfs_statfs: statfs error = %d\n", -error);
+ printk(KERN_WARNING "nfs_statfs: statfs error = %d\n", -error);
buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
- return 0;
+ goto out;
+
}

static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/ntfs/super.c linux-2.5.24-statfs/fs/ntfs/super.c
--- linux-2.5.24/fs/ntfs/super.c Wed Jun 26 01:07:20 2002
+++ linux-2.5.24-statfs/fs/ntfs/super.c Tue Jul 2 16:52:35 2002
@@ -27,6 +27,7 @@
#include <linux/blkdev.h> /* For bdev_hardsect_size(). */
#include <linux/backing-dev.h>
#include <linux/buffer_head.h>
+#include <linux/smp_lock.h>

#include "ntfs.h"
#include "sysctl.h"
@@ -1334,6 +1335,8 @@
{
ntfs_volume *vol = NTFS_SB(sb);
s64 size;
+
+ lock_kernel();

ntfs_debug("Entering.");
/* Type of filesystem. */
@@ -1372,6 +1375,9 @@
sfs->f_fsid.val[1] = (vol->serial_no >> 32) & 0xffffffff;
/* Maximum length of filenames. */
sfs->f_namelen = NTFS_MAX_NAME_LEN;
+
+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/open.c linux-2.5.24-statfs/fs/open.c
--- linux-2.5.24/fs/open.c Tue Jun 18 19:11:46 2002
+++ linux-2.5.24-statfs/fs/open.c Wed Jun 26 01:41:08 2002
@@ -30,9 +30,7 @@
retval = -ENOSYS;
if (sb->s_op && sb->s_op->statfs) {
memset(buf, 0, sizeof(struct statfs));
- lock_kernel();
retval = sb->s_op->statfs(sb, buf);
- unlock_kernel();
}
}
return retval;
diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/qnx4/inode.c linux-2.5.24-statfs/fs/qnx4/inode.c
--- linux-2.5.24/fs/qnx4/inode.c Tue Jun 18 19:11:52 2002
+++ linux-2.5.24-statfs/fs/qnx4/inode.c Wed Jun 26 01:41:08 2002
@@ -281,6 +281,8 @@

static int qnx4_statfs(struct super_block *sb, struct statfs *buf)
{
+ lock_kernel();
+
buf->f_type = sb->s_magic;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size) * 8;
@@ -288,6 +290,7 @@
buf->f_bavail = buf->f_bfree;
buf->f_namelen = QNX4_NAME_MAX;

+ unlock_kernel();
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/reiserfs/super.c linux-2.5.24-statfs/fs/reiserfs/super.c
--- linux-2.5.24/fs/reiserfs/super.c Tue Jun 18 19:11:54 2002
+++ linux-2.5.24-statfs/fs/reiserfs/super.c Wed Jun 26 01:41:08 2002
@@ -1257,6 +1257,8 @@
{
struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK (s);

+ lock_kernel();
+
buf->f_namelen = (REISERFS_MAX_NAME (s->s_blocksize));
buf->f_ffree = -1;
buf->f_files = -1;
@@ -1266,6 +1268,9 @@
buf->f_bsize = s->s_blocksize;
/* changed to accomodate gcc folks.*/
buf->f_type = REISERFS_SUPER_MAGIC;
+
+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/smbfs/inode.c linux-2.5.24-statfs/fs/smbfs/inode.c
--- linux-2.5.24/fs/smbfs/inode.c Tue Jun 18 19:11:48 2002
+++ linux-2.5.24-statfs/fs/smbfs/inode.c Tue Jul 2 17:18:29 2002
@@ -604,7 +604,13 @@
static int
smb_statfs(struct super_block *sb, struct statfs *buf)
{
- int result = smb_proc_dskattr(sb, buf);
+ int result;
+
+ lock_kernel();
+
+ result = smb_proc_dskattr(sb, buf);
+
+ unlock_kernel();

buf->f_type = SMB_SUPER_MAGIC;
buf->f_namelen = SMB_MAXPATHLEN;
diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/sysv/inode.c linux-2.5.24-statfs/fs/sysv/inode.c
--- linux-2.5.24/fs/sysv/inode.c Tue Jun 18 19:11:45 2002
+++ linux-2.5.24-statfs/fs/sysv/inode.c Wed Jun 26 01:41:08 2002
@@ -78,6 +78,8 @@
{
struct sysv_sb_info *sbi = SYSV_SB(sb);

+ lock_kernel();
+
buf->f_type = sb->s_magic;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = sbi->s_ndatazones;
@@ -85,6 +87,8 @@
buf->f_files = sbi->s_ninodes;
buf->f_ffree = sysv_count_free_inodes(sb);
buf->f_namelen = SYSV_NAMELEN;
+
+ unlock_kernel();
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/udf/super.c linux-2.5.24-statfs/fs/udf/super.c
--- linux-2.5.24/fs/udf/super.c Tue Jun 18 19:11:56 2002
+++ linux-2.5.24-statfs/fs/udf/super.c Wed Jun 26 01:41:08 2002
@@ -1726,6 +1726,7 @@
static int
udf_statfs(struct super_block *sb, struct statfs *buf)
{
+ lock_kernel();
buf->f_type = UDF_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb));
@@ -1737,7 +1738,7 @@
buf->f_ffree = buf->f_bfree;
/* __kernel_fsid_t f_fsid */
buf->f_namelen = UDF_NAME_LEN;
-
+ unlock_kernel();
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/ufs/super.c linux-2.5.24-statfs/fs/ufs/super.c
--- linux-2.5.24/fs/ufs/super.c Tue Jun 18 19:11:44 2002
+++ linux-2.5.24-statfs/fs/ufs/super.c Wed Jun 26 01:41:08 2002
@@ -959,6 +959,8 @@
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;

+ lock_kernel();
+
uspi = sb->u.ufs_sb.s_uspi;
usb1 = ubh_get_usb_first (USPI_UBH);

@@ -972,6 +974,9 @@
buf->f_files = uspi->s_ncg * uspi->s_ipg;
buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
buf->f_namelen = UFS_MAXNAMLEN;
+
+ unlock_kernel();
+
return 0;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/fs/umsdos/inode.c linux-2.5.24-statfs/fs/umsdos/inode.c
--- linux-2.5.24/fs/umsdos/inode.c Tue Jun 18 19:11:48 2002
+++ linux-2.5.24-statfs/fs/umsdos/inode.c Tue Jul 2 17:19:28 2002
@@ -19,6 +19,7 @@
#include <linux/umsdos_fs.h>
#include <linux/list.h>
#include <linux/pagemap.h>
+#include <linux/smp_lock.h>

extern struct dentry_operations umsdos_dentry_operations;

@@ -346,9 +347,12 @@
int UMSDOS_statfs(struct super_block *sb,struct statfs *buf)
{
int ret;
+
+ lock_kernel();
ret = fat_statfs (sb, buf);
if (!ret)
buf->f_namelen = UMSDOS_MAXNAME;
+ unlock_kernel();
return ret;
}

diff -Naur -X /mnt/elbrus/home/pmenage/dontdiff linux-2.5.24/mm/shmem.c linux-2.5.24-statfs/mm/shmem.c
--- linux-2.5.24/mm/shmem.c Tue Jun 18 19:11:53 2002
+++ linux-2.5.24-statfs/mm/shmem.c Wed Jun 26 01:41:08 2002
@@ -1035,6 +1035,8 @@
{
struct shmem_sb_info *sbinfo = SHMEM_SB(sb);

+ lock_kernel();
+
buf->f_type = TMPFS_MAGIC;
buf->f_bsize = PAGE_CACHE_SIZE;
spin_lock (&sbinfo->stat_lock);
@@ -1044,6 +1046,9 @@
buf->f_ffree = sbinfo->free_inodes;
spin_unlock (&sbinfo->stat_lock);
buf->f_namelen = 255;
+
+ unlock_kernel();
+
return 0;
}

-
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