diff options
Diffstat (limited to 'block/fops.c')
| -rw-r--r-- | block/fops.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/block/fops.c b/block/fops.c index 9f26e25bafa1..086612103b9d 100644 --- a/block/fops.c +++ b/block/fops.c @@ -470,6 +470,30 @@ static int blkdev_fsync(struct file *filp, loff_t start, loff_t end, return error; } +blk_mode_t file_to_blk_mode(struct file *file) +{ + blk_mode_t mode = 0; + + if (file->f_mode & FMODE_READ) + mode |= BLK_OPEN_READ; + if (file->f_mode & FMODE_WRITE) + mode |= BLK_OPEN_WRITE; + if (file->f_mode & FMODE_EXCL) + mode |= BLK_OPEN_EXCL; + if (file->f_flags & O_NDELAY) + mode |= BLK_OPEN_NDELAY; + + /* + * If all bits in O_ACCMODE set (aka O_RDWR | O_WRONLY), the floppy + * driver has historically allowed ioctls as if the file was opened for + * writing, but does not allow and actual reads or writes. + */ + if ((file->f_flags & O_ACCMODE) == (O_RDWR | O_WRONLY)) + mode |= BLK_OPEN_WRITE_IOCTL; + + return mode; +} + static int blkdev_open(struct inode *inode, struct file *filp) { struct block_device *bdev; @@ -483,14 +507,10 @@ static int blkdev_open(struct inode *inode, struct file *filp) filp->f_flags |= O_LARGEFILE; filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC; - if (filp->f_flags & O_NDELAY) - filp->f_mode |= FMODE_NDELAY; if (filp->f_flags & O_EXCL) filp->f_mode |= FMODE_EXCL; - if ((filp->f_flags & O_ACCMODE) == 3) - filp->f_mode |= FMODE_WRITE_IOCTL; - bdev = blkdev_get_by_dev(inode->i_rdev, filp->f_mode, + bdev = blkdev_get_by_dev(inode->i_rdev, file_to_blk_mode(filp), (filp->f_mode & FMODE_EXCL) ? filp : NULL, NULL); if (IS_ERR(bdev)) @@ -648,7 +668,7 @@ static long blkdev_fallocate(struct file *file, int mode, loff_t start, filemap_invalidate_lock(inode->i_mapping); /* Invalidate the page cache, including dirty pages. */ - error = truncate_bdev_range(bdev, file->f_mode, start, end); + error = truncate_bdev_range(bdev, file_to_blk_mode(file), start, end); if (error) goto fail; |