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Push BKL down into ->remount_fs()

Browse Source 
[xfs, btrfs, capifs, shmem don't need BKL, exempt]

Signed-off-by: Alessio Igor Bogani <abogani@texware.it>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Alessio Igor Bogani 2009-05-12 15:10:54 +02:00 committed by Al Viro
parent 4195f73d13
commit 337eb00a2c
18 changed files with 108 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/usb/core/inode.c
View File

@ -39,6 +39,7 @@
#include <linux/parser.h>
#include <linux/notifier.h>
#include <linux/seq_file.h>
#include <linux/smp_lock.h>
#include <asm/byteorder.h>
#include "usb.h"
#include "hcd.h"
@ -265,9 +266,13 @@ static int remount(struct super_block *sb, int *flags, char *data)
return -EINVAL;
}
lock_kernel();
if (usbfs_mount && usbfs_mount->mnt_sb)
update_sb(usbfs_mount->mnt_sb);
unlock_kernel();
return 0;
}

7
fs/affs/super.c
View File

@ -16,6 +16,7 @@
#include <linux/parser.h>
#include <linux/magic.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
#include "affs.h"
extern struct timezone sys_tz;
@ -512,6 +513,7 @@ affs_remount(struct super_block *sb, int *flags, char *data)
kfree(new_opts);
return -EINVAL;
}
lock_kernel();
replace_mount_options(sb, new_opts);
sbi->s_flags = mount_flags;
@ -519,8 +521,10 @@ affs_remount(struct super_block *sb, int *flags, char *data)
sbi->s_uid = uid;
sbi->s_gid = gid;
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
unlock_kernel();
return 0;
}
if (*flags & MS_RDONLY) {
sb->s_dirt = 1;
while (sb->s_dirt)
@ -529,6 +533,7 @@ affs_remount(struct super_block *sb, int *flags, char *data)
} else
res = affs_init_bitmap(sb, flags);
unlock_kernel();
return res;
}

12
fs/ext2/super.c
View File

@ -1162,6 +1162,8 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
unsigned long old_sb_flags;
int err;
lock_kernel();
/* Store the old options */
old_sb_flags = sb->s_flags;
old_opts.s_mount_opt = sbi->s_mount_opt;
@ -1197,12 +1199,16 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
sbi->s_mount_opt &= ~EXT2_MOUNT_XIP;
sbi->s_mount_opt |= old_mount_opt & EXT2_MOUNT_XIP;
}
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
unlock_kernel();
return 0;
}
if (*flags & MS_RDONLY) {
if (le16_to_cpu(es->s_state) & EXT2_VALID_FS ||
!(sbi->s_mount_state & EXT2_VALID_FS))
!(sbi->s_mount_state & EXT2_VALID_FS)) {
unlock_kernel();
return 0;
}
/*
* OK, we are remounting a valid rw partition rdonly, so set
* the rdonly flag and then mark the partition as valid again.
@ -1229,12 +1235,14 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
sb->s_flags &= ~MS_RDONLY;
}
ext2_sync_super(sb, es);
unlock_kernel();
return 0;
restore_opts:
sbi->s_mount_opt = old_opts.s_mount_opt;
sbi->s_resuid = old_opts.s_resuid;
sbi->s_resgid = old_opts.s_resgid;
sb->s_flags = old_sb_flags;
unlock_kernel();
return err;
}

4
fs/ext3/super.c
View File

@ -2490,6 +2490,8 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
int i;
#endif
lock_kernel();
/* Store the original options */
lock_super(sb);
old_sb_flags = sb->s_flags;
@ -2600,6 +2602,7 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
kfree(old_opts.s_qf_names[i]);
#endif
unlock_super(sb);
unlock_kernel();
return 0;
restore_opts:
sb->s_flags = old_sb_flags;
@ -2617,6 +2620,7 @@ restore_opts:
}
#endif
unlock_super(sb);
unlock_kernel();
return err;
}

4
fs/ext4/super.c
View File

@ -3422,6 +3422,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
int i;
#endif
lock_kernel();
/* Store the original options */
lock_super(sb);
old_sb_flags = sb->s_flags;
@ -3558,6 +3560,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
kfree(old_opts.s_qf_names[i]);
#endif
unlock_super(sb);
unlock_kernel();
return 0;
restore_opts:
@ -3578,6 +3581,7 @@ restore_opts:
}
#endif
unlock_super(sb);
unlock_kernel();
return err;
}

4
fs/hpfs/super.c
View File

@ -13,6 +13,7 @@
#include <linux/statfs.h>
#include <linux/magic.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
/* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */
@ -398,6 +399,7 @@ static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
*flags |= MS_NOATIME;
lock_kernel();
lock_super(s);
uid = sbi->sb_uid; gid = sbi->sb_gid;
umask = 0777 & ~sbi->sb_mode;
@ -432,10 +434,12 @@ static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
replace_mount_options(s, new_opts);
unlock_super(s);
unlock_kernel();
return 0;
out_err:
unlock_super(s);
unlock_kernel();
kfree(new_opts);
return -EINVAL;
}

3
fs/jffs2/fs.c
View File

@ -20,6 +20,7 @@
#include <linux/vmalloc.h>
#include <linux/vfs.h>
#include <linux/crc32.h>
#include <linux/smp_lock.h>
#include "nodelist.h"
static int jffs2_flash_setup(struct jffs2_sb_info *c);
@ -387,6 +388,7 @@ int jffs2_remount_fs (struct super_block *sb, int *flags, char *data)
This also catches the case where it was stopped and this
is just a remount to restart it.
Flush the writebuffer, if neccecary, else we loose it */
lock_kernel();
if (!(sb->s_flags & MS_RDONLY)) {
jffs2_stop_garbage_collect_thread(c);
mutex_lock(&c->alloc_sem);
@ -399,6 +401,7 @@ int jffs2_remount_fs (struct super_block *sb, int *flags, char *data)
*flags |= MS_NOATIME;
unlock_kernel();
return 0;
}

22
fs/jfs/super.c
View File

@ -32,6 +32,7 @@
#include <linux/crc32.h>
#include <asm/uaccess.h>
#include <linux/seq_file.h>
#include <linux/smp_lock.h>
#include "jfs_incore.h"
#include "jfs_filsys.h"
@ -375,19 +376,24 @@ static int jfs_remount(struct super_block *sb, int *flags, char *data)
s64 newLVSize = 0;
int rc = 0;
int flag = JFS_SBI(sb)->flag;
int ret;
if (!parse_options(data, sb, &newLVSize, &flag)) {
return -EINVAL;
}
lock_kernel();
if (newLVSize) {
if (sb->s_flags & MS_RDONLY) {
printk(KERN_ERR
"JFS: resize requires volume to be mounted read-write\n");
unlock_kernel();
return -EROFS;
}
rc = jfs_extendfs(sb, newLVSize, 0);
if (rc)
if (rc) {
unlock_kernel();
return rc;
}
}
if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
@ -398,23 +404,31 @@ static int jfs_remount(struct super_block *sb, int *flags, char *data)
truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
JFS_SBI(sb)->flag = flag;
return jfs_mount_rw(sb, 1);
ret = jfs_mount_rw(sb, 1);
unlock_kernel();
return ret;
}
if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
rc = jfs_umount_rw(sb);
JFS_SBI(sb)->flag = flag;
unlock_kernel();
return rc;
}
if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
if (!(sb->s_flags & MS_RDONLY)) {
rc = jfs_umount_rw(sb);
if (rc)
if (rc) {
unlock_kernel();
return rc;
}
JFS_SBI(sb)->flag = flag;
return jfs_mount_rw(sb, 1);
ret = jfs_mount_rw(sb, 1);
unlock_kernel();
return ret;
}
JFS_SBI(sb)->flag = flag;
unlock_kernel();
return 0;
}

2
fs/nfs/super.c
View File

@ -1813,6 +1813,7 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
if (data == NULL)
return -ENOMEM;
lock_kernel();
/* fill out struct with values from existing mount */
data->flags = nfss->flags;
data->rsize = nfss->rsize;
@ -1837,6 +1838,7 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data)
error = nfs_compare_remount_data(nfss, data);
out:
kfree(data);
unlock_kernel();
return error;
}

4
fs/nilfs2/super.c
View File

@ -906,6 +906,8 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
struct nilfs_mount_options old_opts;
int err;
lock_kernel();
old_sb_flags = sb->s_flags;
old_opts.mount_opt = sbi->s_mount_opt;
old_opts.snapshot_cno = sbi->s_snapshot_cno;
@ -985,6 +987,7 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
up(&sb->s_bdev->bd_mount_sem);
}
out:
unlock_kernel();
return 0;
rw_remount_failed:
@ -993,6 +996,7 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data)
sb->s_flags = old_sb_flags;
sbi->s_mount_opt = old_opts.mount_opt;
sbi->s_snapshot_cno = old_opts.snapshot_cno;
unlock_kernel();
return err;
}

15
fs/ntfs/super.c
View File

@ -443,6 +443,8 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
ntfs_volume *vol = NTFS_SB(sb);
ntfs_debug("Entering with remount options string: %s", opt);
lock_kernel();
#ifndef NTFS_RW
/* For read-only compiled driver, enforce read-only flag. */
*flags |= MS_RDONLY;
@ -466,15 +468,18 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
if (NVolErrors(vol)) {
ntfs_error(sb, "Volume has errors and is read-only%s",
es);
unlock_kernel();
return -EROFS;
}
if (vol->vol_flags & VOLUME_IS_DIRTY) {
ntfs_error(sb, "Volume is dirty and read-only%s", es);
unlock_kernel();
return -EROFS;
}
if (vol->vol_flags & VOLUME_MODIFIED_BY_CHKDSK) {
ntfs_error(sb, "Volume has been modified by chkdsk "
"and is read-only%s", es);
unlock_kernel();
return -EROFS;
}
if (vol->vol_flags & VOLUME_MUST_MOUNT_RO_MASK) {
@ -482,11 +487,13 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
"(0x%x) and is read-only%s",
(unsigned)le16_to_cpu(vol->vol_flags),
es);
unlock_kernel();
return -EROFS;
}
if (ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY)) {
ntfs_error(sb, "Failed to set dirty bit in volume "
"information flags%s", es);
unlock_kernel();
return -EROFS;
}
#if 0
@ -506,18 +513,21 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
ntfs_error(sb, "Failed to empty journal $LogFile%s",
es);
NVolSetErrors(vol);
unlock_kernel();
return -EROFS;
}
if (!ntfs_mark_quotas_out_of_date(vol)) {
ntfs_error(sb, "Failed to mark quotas out of date%s",
es);
NVolSetErrors(vol);
unlock_kernel();
return -EROFS;
}
if (!ntfs_stamp_usnjrnl(vol)) {
ntfs_error(sb, "Failed to stamp transation log "
"($UsnJrnl)%s", es);
NVolSetErrors(vol);
unlock_kernel();
return -EROFS;
}
} else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) {
@ -533,8 +543,11 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
// TODO: Deal with *flags.
if (!parse_options(vol, opt))
if (!parse_options(vol, opt)) {
unlock_kernel();
return -EINVAL;
}
unlock_kernel();
ntfs_debug("Done.");
return 0;
}

4
fs/ocfs2/super.c
View File

@ -42,6 +42,7 @@
#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/quotaops.h>
#include <linux/smp_lock.h>
#define MLOG_MASK_PREFIX ML_SUPER
#include <cluster/masklog.h>
@ -581,6 +582,8 @@ static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
struct mount_options parsed_options;
struct ocfs2_super *osb = OCFS2_SB(sb);
lock_kernel();
if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
ret = -EINVAL;
goto out;
@ -684,6 +687,7 @@ unlock_osb:
ocfs2_set_journal_params(osb);
}
out:
unlock_kernel();
return ret;
}

4
fs/reiserfs/super.c
View File

@ -28,6 +28,7 @@
#include <linux/mount.h>
#include <linux/namei.h>
#include <linux/crc32.h>
#include <linux/smp_lock.h>
struct file_system_type reiserfs_fs_type;
@ -1196,6 +1197,7 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
memcpy(qf_names, REISERFS_SB(s)->s_qf_names, sizeof(qf_names));
#endif
lock_kernel();
rs = SB_DISK_SUPER_BLOCK(s);
if (!reiserfs_parse_options
@ -1318,10 +1320,12 @@ static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
out_ok:
replace_mount_options(s, new_opts);
unlock_kernel();
return 0;
out_err:
kfree(new_opts);
unlock_kernel();
return err;
}

2
fs/super.c
View File

@ -540,7 +540,6 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
shrink_dcache_sb(sb);
sync_filesystem(sb);
lock_kernel();
/* If we are remounting RDONLY and current sb is read/write,
make sure there are no rw files opened */
if ((flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY)) {
@ -566,7 +565,6 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
}
}
sb->s_flags = (sb->s_flags & ~MS_RMT_MASK) | (flags & MS_RMT_MASK);
unlock_kernel();
if (remount_rw)
vfs_dq_quota_on_remount(sb);
return 0;

9
fs/ubifs/super.c
View File

@ -36,6 +36,7 @@
#include <linux/mount.h>
#include <linux/math64.h>
#include <linux/writeback.h>
#include <linux/smp_lock.h>
#include "ubifs.h"
/*
@ -1770,17 +1771,22 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data)
return err;
}
lock_kernel();
if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
if (c->ro_media) {
ubifs_msg("cannot re-mount due to prior errors");
unlock_kernel();
return -EROFS;
}
err = ubifs_remount_rw(c);
if (err)
if (err) {
unlock_kernel();
return err;
}
} else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) {
if (c->ro_media) {
ubifs_msg("cannot re-mount due to prior errors");
unlock_kernel();
return -EROFS;
}
ubifs_remount_ro(c);
@ -1795,6 +1801,7 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data)
}
ubifs_assert(c->lst.taken_empty_lebs > 0);
unlock_kernel();
return 0;
}

6
fs/udf/super.c
View File

@ -568,6 +568,7 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
if (!udf_parse_options(options, &uopt, true))
return -EINVAL;
lock_kernel();
sbi->s_flags = uopt.flags;
sbi->s_uid = uopt.uid;
sbi->s_gid = uopt.gid;
@ -581,13 +582,16 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
*flags |= MS_RDONLY;
}
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
unlock_kernel();
return 0;
}
if (*flags & MS_RDONLY)
udf_close_lvid(sb);
else
udf_open_lvid(sb);
unlock_kernel();
return 0;
}

11
fs/ufs/super.c
View File

@ -263,6 +263,7 @@ void ufs_panic (struct super_block * sb, const char * function,
struct ufs_super_block_first * usb1;
va_list args;
lock_kernel();
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(uspi);
@ -1182,7 +1183,8 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
struct ufs_super_block_third * usb3;
unsigned new_mount_opt, ufstype;
unsigned flags;
lock_kernel();
lock_super(sb);
uspi = UFS_SB(sb)->s_uspi;
flags = UFS_SB(sb)->s_flags;
@ -1198,6 +1200,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
ufs_set_opt (new_mount_opt, ONERROR_LOCK);
if (!ufs_parse_options (data, &new_mount_opt)) {
unlock_super(sb);
unlock_kernel();
return -EINVAL;
}
if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
@ -1205,12 +1208,14 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
} else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
printk("ufstype can't be changed during remount\n");
unlock_super(sb);
unlock_kernel();
return -EINVAL;
}
if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
UFS_SB(sb)->s_mount_opt = new_mount_opt;
unlock_super(sb);
unlock_kernel();
return 0;
}
@ -1236,6 +1241,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
printk("ufs was compiled with read-only support, "
"can't be mounted as read-write\n");
unlock_super(sb);
unlock_kernel();
return -EINVAL;
#else
if (ufstype != UFS_MOUNT_UFSTYPE_SUN &&
@ -1245,11 +1251,13 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
printk("this ufstype is read-only supported\n");
unlock_super(sb);
unlock_kernel();
return -EINVAL;
}
if (!ufs_read_cylinder_structures(sb)) {
printk("failed during remounting\n");
unlock_super(sb);
unlock_kernel();
return -EPERM;
}
sb->s_flags &= ~MS_RDONLY;
@ -1257,6 +1265,7 @@ static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
}
UFS_SB(sb)->s_mount_opt = new_mount_opt;
unlock_super(sb);
unlock_kernel();
return 0;
}

3
kernel/cgroup.c
View File

@ -46,6 +46,7 @@
#include <linux/cgroupstats.h>
#include <linux/hash.h>
#include <linux/namei.h>
#include <linux/smp_lock.h>
#include <asm/atomic.h>
@ -900,6 +901,7 @@ static int cgroup_remount(struct super_block *sb, int *flags, char *data)
struct cgroup *cgrp = &root->top_cgroup;
struct cgroup_sb_opts opts;
lock_kernel();
mutex_lock(&cgrp->dentry->d_inode->i_mutex);
mutex_lock(&cgroup_mutex);
@ -927,6 +929,7 @@ static int cgroup_remount(struct super_block *sb, int *flags, char *data)
kfree(opts.release_agent);
mutex_unlock(&cgroup_mutex);
mutex_unlock(&cgrp->dentry->d_inode->i_mutex);
unlock_kernel();
return ret;
}