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Subject: [PATCH 12/16] fs/ntfs3: Implement super_operations::shutdown
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From: Konstantin Komarovc <almaz.alexandrovich@paragon-software.com>
To: <ntfs3@lists.linux.dev>
CC: <linux-kernel@vger.kernel.org>, <linux-fsdevel@vger.kernel.org>
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Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
---
 =C2=A0fs/ntfs3/file.c=C2=A0=C2=A0=C2=A0 | 18 ++++++++++++++++++
 =C2=A0fs/ntfs3/frecord.c |=C2=A0 3 +++
 =C2=A0fs/ntfs3/inode.c=C2=A0=C2=A0 | 21 +++++++++++++++++++--
 =C2=A0fs/ntfs3/namei.c=C2=A0=C2=A0 | 12 ++++++++++++
 =C2=A0fs/ntfs3/ntfs_fs.h |=C2=A0 9 ++++++++-
 =C2=A0fs/ntfs3/super.c=C2=A0=C2=A0 | 12 ++++++++++++
 =C2=A0fs/ntfs3/xattr.c=C2=A0=C2=A0 |=C2=A0 3 +++
 =C2=A07 files changed, 75 insertions(+), 3 deletions(-)

diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index 0ff5d3af2889..07ed3d946e7c 100644
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -260,6 +260,9 @@ static int ntfs_file_mmap(struct file *file, struct=20
vm_area_struct *vma)
 =C2=A0=C2=A0=C2=A0 =C2=A0bool rw =3D vma->vm_flags & VM_WRITE;
 =C2=A0=C2=A0=C2=A0 =C2=A0int err;

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0if (is_encrypted(ni)) {
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0ntfs_inode_warn(inode, "mmap e=
ncrypted not supported");
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EOPNOTSUPP;
@@ -677,6 +680,9 @@ int ntfs3_setattr(struct mnt_idmap *idmap, struct=20
dentry *dentry,
 =C2=A0=C2=A0=C2=A0 =C2=A0umode_t mode =3D inode->i_mode;
 =C2=A0=C2=A0=C2=A0 =C2=A0int err;

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0err =3D setattr_prepare(idmap, dentry, attr);
 =C2=A0=C2=A0=C2=A0 =C2=A0if (err)
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0goto out;
@@ -732,6 +738,9 @@ static ssize_t ntfs_file_read_iter(struct kiocb=20
*iocb, struct iov_iter *iter)
 =C2=A0=C2=A0=C2=A0 =C2=A0struct inode *inode =3D file->f_mapping->host;
 =C2=A0=C2=A0=C2=A0 =C2=A0struct ntfs_inode *ni =3D ntfs_i(inode);

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0if (is_encrypted(ni)) {
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0ntfs_inode_warn(inode, "encryp=
ted i/o not supported");
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EOPNOTSUPP;
@@ -766,6 +775,9 @@ static ssize_t ntfs_file_splice_read(struct file=20
*in, loff_t *ppos,
 =C2=A0=C2=A0=C2=A0 =C2=A0struct inode *inode =3D in->f_mapping->host;
 =C2=A0=C2=A0=C2=A0 =C2=A0struct ntfs_inode *ni =3D ntfs_i(inode);

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0if (is_encrypted(ni)) {
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0ntfs_inode_warn(inode, "encryp=
ted i/o not supported");
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EOPNOTSUPP;
@@ -1058,6 +1070,9 @@ static ssize_t ntfs_file_write_iter(struct kiocb=20
*iocb, struct iov_iter *from)
 =C2=A0=C2=A0=C2=A0 =C2=A0int err;
 =C2=A0=C2=A0=C2=A0 =C2=A0struct ntfs_inode *ni =3D ntfs_i(inode);

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0if (is_encrypted(ni)) {
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0ntfs_inode_warn(inode, "encryp=
ted i/o not supported");
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EOPNOTSUPP;
@@ -1118,6 +1133,9 @@ int ntfs_file_open(struct inode *inode, struct=20
file *file)
 =C2=A0{
 =C2=A0=C2=A0=C2=A0 =C2=A0struct ntfs_inode *ni =3D ntfs_i(inode);

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0if (unlikely((is_compressed(ni) || is_encrypted(n=
i)) &&
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (file=
->f_flags & O_DIRECT))) {
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EOPNOTSUPP;
diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
index 3df2d9e34b91..8744ba36d422 100644
--- a/fs/ntfs3/frecord.c
+++ b/fs/ntfs3/frecord.c
@@ -3259,6 +3259,9 @@ int ni_write_inode(struct inode *inode, int sync,=20
const char *hint)
 =C2=A0=C2=A0=C2=A0 =C2=A0if (is_bad_inode(inode) || sb_rdonly(sb))
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return 0;

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0if (!ni_trylock(ni)) {
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0/* 'ni' is under modification,=
 skip for now. */
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0mark_inode_dirty_sync(inode);
diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index bba0208c4afd..85452a6b1d40 100644
--- a/fs/ntfs3/inode.c
+++ b/fs/ntfs3/inode.c
@@ -852,9 +852,13 @@ static int ntfs_resident_writepage(struct folio *folio,
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=
=A0 =C2=A0=C2=A0=C2=A0 struct writeback_control *wbc, void *data)
 =C2=A0{
 =C2=A0=C2=A0=C2=A0 =C2=A0struct address_space *mapping =3D data;
-=C2=A0=C2=A0 =C2=A0struct ntfs_inode *ni =3D ntfs_i(mapping->host);
+=C2=A0=C2=A0 =C2=A0struct inode *inode =3D mapping->host;
+=C2=A0=C2=A0 =C2=A0struct ntfs_inode *ni =3D ntfs_i(inode);
 =C2=A0=C2=A0=C2=A0 =C2=A0int ret;

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0ni_lock(ni);
 =C2=A0=C2=A0=C2=A0 =C2=A0ret =3D attr_data_write_resident(ni, &folio->page=
);
 =C2=A0=C2=A0=C2=A0 =C2=A0ni_unlock(ni);
@@ -868,7 +872,12 @@ static int ntfs_resident_writepage(struct folio *folio,
 =C2=A0static int ntfs_writepages(struct address_space *mapping,
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=
=A0 struct writeback_control *wbc)
 =C2=A0{
-=C2=A0=C2=A0 =C2=A0if (is_resident(ntfs_i(mapping->host)))
+=C2=A0=C2=A0 =C2=A0struct inode *inode =3D mapping->host;
+
+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
+=C2=A0=C2=A0 =C2=A0if (is_resident(ntfs_i(inode)))
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return write_cache_pages(mappi=
ng, wbc, ntfs_resident_writepage,
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=
=A0 =C2=A0=C2=A0=C2=A0 =C2=A0 mapping);
 =C2=A0=C2=A0=C2=A0 =C2=A0return mpage_writepages(mapping, wbc, ntfs_get_bl=
ock);
@@ -888,6 +897,9 @@ int ntfs_write_begin(struct file *file, struct=20
address_space *mapping,
 =C2=A0=C2=A0=C2=A0 =C2=A0struct inode *inode =3D mapping->host;
 =C2=A0=C2=A0=C2=A0 =C2=A0struct ntfs_inode *ni =3D ntfs_i(inode);

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0*pagep =3D NULL;
 =C2=A0=C2=A0=C2=A0 =C2=A0if (is_resident(ni)) {
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0struct page *page =3D
@@ -1305,6 +1317,11 @@ struct inode *ntfs_create_inode(struct mnt_idmap=20
*idmap, struct inode *dir,
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0goto out1;
 =C2=A0=C2=A0=C2=A0 =C2=A0}

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(sb))) {
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0err =3D -EIO;
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0goto out2;
+=C2=A0=C2=A0 =C2=A0}
+
 =C2=A0=C2=A0=C2=A0 =C2=A0/* Mark rw ntfs as dirty. it will be cleared at u=
mount. */
 =C2=A0=C2=A0=C2=A0 =C2=A0ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);

diff --git a/fs/ntfs3/namei.c b/fs/ntfs3/namei.c
index ee3093be5170..cae41db0aaa7 100644
--- a/fs/ntfs3/namei.c
+++ b/fs/ntfs3/namei.c
@@ -181,6 +181,9 @@ static int ntfs_unlink(struct inode *dir, struct=20
dentry *dentry)
 =C2=A0=C2=A0=C2=A0 =C2=A0struct ntfs_inode *ni =3D ntfs_i(dir);
 =C2=A0=C2=A0=C2=A0 =C2=A0int err;

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(dir->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0ni_lock_dir(ni);

 =C2=A0=C2=A0=C2=A0 =C2=A0err =3D ntfs_unlink_inode(dir, dentry);
@@ -199,6 +202,9 @@ static int ntfs_symlink(struct mnt_idmap *idmap,=20
struct inode *dir,
 =C2=A0=C2=A0=C2=A0 =C2=A0u32 size =3D strlen(symname);
 =C2=A0=C2=A0=C2=A0 =C2=A0struct inode *inode;

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(dir->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0inode =3D ntfs_create_inode(idmap, dir, dentry, N=
ULL, S_IFLNK | 0777, 0,
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=
=A0 =C2=A0=C2=A0 symname, size, NULL);

@@ -227,6 +233,9 @@ static int ntfs_rmdir(struct inode *dir, struct=20
dentry *dentry)
 =C2=A0=C2=A0=C2=A0 =C2=A0struct ntfs_inode *ni =3D ntfs_i(dir);
 =C2=A0=C2=A0=C2=A0 =C2=A0int err;

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(dir->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0ni_lock_dir(ni);

 =C2=A0=C2=A0=C2=A0 =C2=A0err =3D ntfs_unlink_inode(dir, dentry);
@@ -264,6 +273,9 @@ static int ntfs_rename(struct mnt_idmap *idmap,=20
struct inode *dir,
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 1024);
 =C2=A0=C2=A0=C2=A0 =C2=A0static_assert(PATH_MAX >=3D 4 * 1024);

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0if (flags & ~RENAME_NOREPLACE)
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EINVAL;

diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h
index f6706143d14b..d40bc7669ae5 100644
--- a/fs/ntfs3/ntfs_fs.h
+++ b/fs/ntfs3/ntfs_fs.h
@@ -61,6 +61,8 @@ enum utf16_endian;

 =C2=A0/* sbi->flags */
 =C2=A0#define NTFS_FLAGS_NODISCARD=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A00x=
00000001
+/* ntfs in shutdown state. */
+#define NTFS_FLAGS_SHUTDOWN=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A00x00000002
 =C2=A0/* Set when LogFile is replaying. */
 =C2=A0#define NTFS_FLAGS_LOG_REPLAYING=C2=A0=C2=A0 =C2=A00x00000008
 =C2=A0/* Set when we changed first MFT's which copy must be updated in=20
$MftMirr. */
@@ -226,7 +228,7 @@ struct ntfs_sb_info {
 =C2=A0=C2=A0=C2=A0 =C2=A0u64 maxbytes; // Maximum size for normal files.
 =C2=A0=C2=A0=C2=A0 =C2=A0u64 maxbytes_sparse; // Maximum size for sparse f=
ile.

-=C2=A0=C2=A0 =C2=A0u32 flags; // See NTFS_FLAGS_XXX.
+=C2=A0=C2=A0 =C2=A0unsigned long flags; // See NTFS_FLAGS_

 =C2=A0=C2=A0=C2=A0 =C2=A0CLST zone_max; // Maximum MFT zone length in clus=
ters
 =C2=A0=C2=A0=C2=A0 =C2=A0CLST bad_clusters; // The count of marked bad clu=
sters.
@@ -999,6 +1001,11 @@ static inline struct ntfs_sb_info *ntfs_sb(struct=20
super_block *sb)
 =C2=A0=C2=A0=C2=A0 =C2=A0return sb->s_fs_info;
 =C2=A0}

+static inline bool ntfs3_forced_shutdown(struct super_block *sb)
+{
+=C2=A0=C2=A0 =C2=A0return test_bit(NTFS_FLAGS_SHUTDOWN, &ntfs_sb(sb)->flag=
s);
+}
+
 =C2=A0/*
 =C2=A0 * ntfs_up_cluster - Align up on cluster boundary.
 =C2=A0 */
diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
index 09d61c6c90aa..af8521a6ed95 100644
--- a/fs/ntfs3/super.c
+++ b/fs/ntfs3/super.c
@@ -714,6 +714,14 @@ static int ntfs_show_options(struct seq_file *m,=20
struct dentry *root)
 =C2=A0=C2=A0=C2=A0 =C2=A0return 0;
 =C2=A0}

+/*
+ * ntfs_shutdown - super_operations::shutdown
+ */
+static void ntfs_shutdown(struct super_block *sb)
+{
+=C2=A0=C2=A0 =C2=A0set_bit(NTFS_FLAGS_SHUTDOWN, &ntfs_sb(sb)->flags);
+}
+
 =C2=A0/*
 =C2=A0 * ntfs_sync_fs - super_operations::sync_fs
 =C2=A0 */
@@ -724,6 +732,9 @@ static int ntfs_sync_fs(struct super_block *sb, int=20
wait)
 =C2=A0=C2=A0=C2=A0 =C2=A0struct ntfs_inode *ni;
 =C2=A0=C2=A0=C2=A0 =C2=A0struct inode *inode;

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0ni =3D sbi->security.ni;
 =C2=A0=C2=A0=C2=A0 =C2=A0if (ni) {
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0inode =3D &ni->vfs_inode;
@@ -763,6 +774,7 @@ static const struct super_operations ntfs_sops =3D {
 =C2=A0=C2=A0=C2=A0 =C2=A0.put_super =3D ntfs_put_super,
 =C2=A0=C2=A0=C2=A0 =C2=A0.statfs =3D ntfs_statfs,
 =C2=A0=C2=A0=C2=A0 =C2=A0.show_options =3D ntfs_show_options,
+=C2=A0=C2=A0 =C2=A0.shutdown =3D ntfs_shutdown,
 =C2=A0=C2=A0=C2=A0 =C2=A0.sync_fs =3D ntfs_sync_fs,
 =C2=A0=C2=A0=C2=A0 =C2=A0.write_inode =3D ntfs3_write_inode,
 =C2=A0};
diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c
index 4274b6f31cfa..071356d096d8 100644
--- a/fs/ntfs3/xattr.c
+++ b/fs/ntfs3/xattr.c
@@ -744,6 +744,9 @@ static int ntfs_getxattr(const struct xattr_handler=20
*handler, struct dentry *de,
 =C2=A0=C2=A0=C2=A0 =C2=A0int err;
 =C2=A0=C2=A0=C2=A0 =C2=A0struct ntfs_inode *ni =3D ntfs_i(inode);

+=C2=A0=C2=A0 =C2=A0if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0return -EIO;
+
 =C2=A0=C2=A0=C2=A0 =C2=A0/* Dispatch request. */
 =C2=A0=C2=A0=C2=A0 =C2=A0if (!strcmp(name, SYSTEM_DOS_ATTRIB)) {
 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0/* system.dos_attrib */
--=20
2.34.1