Push BKL down into ->remount_fs()
[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>
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 280d361..c481493 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -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 @@
kfree(new_opts);
return -EINVAL;
}
+ lock_kernel();
replace_mount_options(sb, new_opts);
sbi->s_flags = mount_flags;
@@ -519,8 +521,10 @@
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 @@
} else
res = affs_init_bitmap(sb, flags);
+ unlock_kernel();
return res;
}
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index a44963d..f8cbdf5 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1162,6 +1162,8 @@
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 @@
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 @@
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;
}
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index e213a26..26aa64d 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -2490,6 +2490,8 @@
int i;
#endif
+ lock_kernel();
+
/* Store the original options */
lock_super(sb);
old_sb_flags = sb->s_flags;
@@ -2600,6 +2602,7 @@
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 @@
}
#endif
unlock_super(sb);
+ unlock_kernel();
return err;
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c17200a..012c425 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3422,6 +3422,8 @@
int i;
#endif
+ lock_kernel();
+
/* Store the original options */
lock_super(sb);
old_sb_flags = sb->s_flags;
@@ -3558,6 +3560,7 @@
kfree(old_opts.s_qf_names[i]);
#endif
unlock_super(sb);
+ unlock_kernel();
return 0;
restore_opts:
@@ -3578,6 +3581,7 @@
}
#endif
unlock_super(sb);
+ unlock_kernel();
return err;
}
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index f68193c..f2feaa0 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -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 @@
*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 @@
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;
}
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index 237b27a..3451a81 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -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 @@
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 @@
*flags |= MS_NOATIME;
+ unlock_kernel();
return 0;
}
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 3eb13ad..09b1b6e 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -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 @@
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 @@
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;
}
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index d2d6778..26127b6 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1813,6 +1813,7 @@
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 @@
error = nfs_compare_remount_data(nfss, data);
out:
kfree(data);
+ unlock_kernel();
return error;
}
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 7262e84..11151ea 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -906,6 +906,8 @@
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 @@
up(&sb->s_bdev->bd_mount_sem);
}
out:
+ unlock_kernel();
return 0;
rw_remount_failed:
@@ -993,6 +996,7 @@
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;
}
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 7a7b0d3..abaaa1c 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -443,6 +443,8 @@
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 @@
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 @@
"(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 @@
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 @@
// 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;
}
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 0273759..201b40a 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -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 @@
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 @@
ocfs2_set_journal_params(osb);
}
out:
+ unlock_kernel();
return ret;
}
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 90dcb7b..2969773 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -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 @@
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 @@
out_ok:
replace_mount_options(s, new_opts);
+ unlock_kernel();
return 0;
out_err:
kfree(new_opts);
+ unlock_kernel();
return err;
}
diff --git a/fs/super.c b/fs/super.c
index 1905f4a..83b47416 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -540,7 +540,6 @@
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 @@
}
}
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;
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 522c3fd..3589eab 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -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 @@
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 @@
}
ubifs_assert(c->lst.taken_empty_lebs > 0);
+ unlock_kernel();
return 0;
}
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 04802cc..6832135 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -568,6 +568,7 @@
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 @@
*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;
}
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index c97210e..6560dda 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -263,6 +263,7 @@
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 @@
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 @@
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 @@
} 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 @@
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 @@
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 @@
}
UFS_SB(sb)->s_mount_opt = new_mount_opt;
unlock_super(sb);
+ unlock_kernel();
return 0;
}