summaryrefslogtreecommitdiff
path: root/fs/ntfs3/file.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ntfs3/file.c')
-rw-r--r--fs/ntfs3/file.c109
1 files changed, 93 insertions, 16 deletions
diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index 4c90ec2fa2ea..5016bccc2ac5 100644
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -19,6 +19,12 @@
#include "ntfs.h"
#include "ntfs_fs.h"
+/*
+ * cifx, btrfs, exfat, ext4, f2fs use this constant.
+ * Hope this value will become common to all fs.
+ */
+#define NTFS3_IOC_SHUTDOWN _IOR('X', 125, __u32)
+
static int ntfs_ioctl_fitrim(struct ntfs_sb_info *sbi, unsigned long arg)
{
struct fstrim_range __user *user_range;
@@ -59,7 +65,7 @@ static int ntfs_ioctl_get_volume_label(struct ntfs_sb_info *sbi, u8 __user *buf)
static int ntfs_ioctl_set_volume_label(struct ntfs_sb_info *sbi, u8 __user *buf)
{
- u8 user[FSLABEL_MAX] = {0};
+ u8 user[FSLABEL_MAX] = { 0 };
int len;
if (!capable(CAP_SYS_ADMIN))
@@ -74,12 +80,46 @@ static int ntfs_ioctl_set_volume_label(struct ntfs_sb_info *sbi, u8 __user *buf)
}
/*
+ * ntfs_force_shutdown - helper function. Called from ioctl
+ */
+static int ntfs_force_shutdown(struct super_block *sb, u32 flags)
+{
+ int err;
+ struct ntfs_sb_info *sbi = sb->s_fs_info;
+
+ if (unlikely(ntfs3_forced_shutdown(sb)))
+ return 0;
+
+ /* No additional options yet (flags). */
+ err = bdev_freeze(sb->s_bdev);
+ if (err)
+ return err;
+ set_bit(NTFS_FLAGS_SHUTDOWN_BIT, &sbi->flags);
+ bdev_thaw(sb->s_bdev);
+ return 0;
+}
+
+static int ntfs_ioctl_shutdown(struct super_block *sb, unsigned long arg)
+{
+ u32 flags;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (get_user(flags, (__u32 __user *)arg))
+ return -EFAULT;
+
+ return ntfs_force_shutdown(sb, flags);
+}
+
+/*
* ntfs_ioctl - file_operations::unlocked_ioctl
*/
long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
- struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
+ struct super_block *sb = inode->i_sb;
+ struct ntfs_sb_info *sbi = sb->s_fs_info;
/* Avoid any operation if inode is bad. */
if (unlikely(is_bad_ni(ntfs_i(inode))))
@@ -92,6 +132,8 @@ long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg)
return ntfs_ioctl_get_volume_label(sbi, (u8 __user *)arg);
case FS_IOC_SETFSLABEL:
return ntfs_ioctl_set_volume_label(sbi, (u8 __user *)arg);
+ case NTFS3_IOC_SHUTDOWN:
+ return ntfs_ioctl_shutdown(sb, arg);
}
return -ENOTTY; /* Inappropriate ioctl for device. */
}
@@ -325,9 +367,14 @@ static int ntfs_file_mmap_prepare(struct vm_area_desc *desc)
return -EOPNOTSUPP;
}
- if (is_compressed(ni) && rw) {
- ntfs_inode_warn(inode, "mmap(write) compressed not supported");
- return -EOPNOTSUPP;
+ if (is_compressed(ni)) {
+ if (rw) {
+ ntfs_inode_warn(inode,
+ "mmap(write) compressed not supported");
+ return -EOPNOTSUPP;
+ }
+ /* Turn off readahead for compressed files. */
+ file->f_ra.ra_pages = 0;
}
if (rw) {
@@ -503,8 +550,6 @@ static int ntfs_truncate(struct inode *inode, loff_t new_size)
if (dirty)
mark_inode_dirty(inode);
- /*ntfs_flush_inodes(inode->i_sb, inode, NULL);*/
-
return 0;
}
@@ -886,9 +931,24 @@ static ssize_t ntfs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
if (err)
return err;
- if (is_compressed(ni) && (iocb->ki_flags & IOCB_DIRECT)) {
- ntfs_inode_warn(inode, "direct i/o + compressed not supported");
- return -EOPNOTSUPP;
+ if (is_compressed(ni)) {
+ if (iocb->ki_flags & IOCB_DIRECT) {
+ ntfs_inode_warn(
+ inode, "direct i/o + compressed not supported");
+ return -EOPNOTSUPP;
+ }
+ /* Turn off readahead for compressed files. */
+ file->f_ra.ra_pages = 0;
+ }
+
+ /* Check minimum alignment for dio. */
+ if (iocb->ki_flags & IOCB_DIRECT) {
+ struct super_block *sb = inode->i_sb;
+ struct ntfs_sb_info *sbi = sb->s_fs_info;
+ if ((iocb->ki_pos | iov_iter_alignment(iter)) &
+ sbi->bdev_blocksize_mask) {
+ iocb->ki_flags &= ~IOCB_DIRECT;
+ }
}
return generic_file_read_iter(iocb, iter);
@@ -908,6 +968,11 @@ static ssize_t ntfs_file_splice_read(struct file *in, loff_t *ppos,
if (err)
return err;
+ if (is_compressed(ntfs_i(inode))) {
+ /* Turn off readahead for compressed files. */
+ in->f_ra.ra_pages = 0;
+ }
+
return filemap_splice_read(in, ppos, pipe, len, flags);
}
@@ -1026,7 +1091,7 @@ static ssize_t ntfs_compress_write(struct kiocb *iocb, struct iov_iter *from)
if (!frame_uptodate && off) {
err = ni_read_frame(ni, frame_vbo, pages,
- pages_per_frame);
+ pages_per_frame, 0);
if (err) {
for (ip = 0; ip < pages_per_frame; ip++) {
folio = page_folio(pages[ip]);
@@ -1091,7 +1156,7 @@ static ssize_t ntfs_compress_write(struct kiocb *iocb, struct iov_iter *from)
if (off || (to < i_size && (to & (frame_size - 1)))) {
err = ni_read_frame(ni, frame_vbo, pages,
- pages_per_frame);
+ pages_per_frame, 0);
if (err) {
for (ip = 0; ip < pages_per_frame;
ip++) {
@@ -1114,8 +1179,8 @@ static ssize_t ntfs_compress_write(struct kiocb *iocb, struct iov_iter *from)
size_t cp, tail = PAGE_SIZE - off;
folio = page_folio(pages[ip]);
- cp = copy_folio_from_iter_atomic(folio, off,
- min(tail, bytes), from);
+ cp = copy_folio_from_iter_atomic(
+ folio, off, min(tail, bytes), from);
flush_dcache_folio(folio);
copied += cp;
@@ -1312,7 +1377,7 @@ static int ntfs_file_release(struct inode *inode, struct file *file)
if (sbi->options->prealloc &&
((file->f_mode & FMODE_WRITE) &&
atomic_read(&inode->i_writecount) == 1)
- /*
+ /*
* The only file when inode->i_fop = &ntfs_file_operations and
* init_rwsem(&ni->file.run_lock) is not called explicitly is MFT.
*
@@ -1375,6 +1440,18 @@ static ssize_t ntfs_file_splice_write(struct pipe_inode_info *pipe,
return iter_file_splice_write(pipe, file, ppos, len, flags);
}
+/*
+ * ntfs_file_fsync - file_operations::fsync
+ */
+static int ntfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+ struct inode *inode = file_inode(file);
+ if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+ return -EIO;
+
+ return generic_file_fsync(file, start, end, datasync);
+}
+
// clang-format off
const struct inode_operations ntfs_file_inode_operations = {
.getattr = ntfs_getattr,
@@ -1397,7 +1474,7 @@ const struct file_operations ntfs_file_operations = {
.splice_write = ntfs_file_splice_write,
.mmap_prepare = ntfs_file_mmap_prepare,
.open = ntfs_file_open,
- .fsync = generic_file_fsync,
+ .fsync = ntfs_file_fsync,
.fallocate = ntfs_fallocate,
.release = ntfs_file_release,
};
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-04 08:02:41 +0000