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authorLinus Torvalds <torvalds@linux-foundation.org>2023-06-26 21:47:20 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2023-06-26 21:47:20 +0200
commita0433f8cae3ac51f59b4b1863032822aaa2d8164 (patch)
tree9eb7b096aa9f7fa53921e6ff247488f3a55471f5 /block/fops.c
parentMerge tag 'for-6.5/io_uring-2023-06-23' of git://git.kernel.dk/linux (diff)
parentscsi/sg: don't grab scsi host module reference (diff)
downloadlinux-a0433f8cae3ac51f59b4b1863032822aaa2d8164.tar.xz
linux-a0433f8cae3ac51f59b4b1863032822aaa2d8164.zip
Merge tag 'for-6.5/block-2023-06-23' of git://git.kernel.dk/linux
Pull block updates from Jens Axboe: - NVMe pull request via Keith: - Various cleanups all around (Irvin, Chaitanya, Christophe) - Better struct packing (Christophe JAILLET) - Reduce controller error logs for optional commands (Keith) - Support for >=64KiB block sizes (Daniel Gomez) - Fabrics fixes and code organization (Max, Chaitanya, Daniel Wagner) - bcache updates via Coly: - Fix a race at init time (Mingzhe Zou) - Misc fixes and cleanups (Andrea, Thomas, Zheng, Ye) - use page pinning in the block layer for dio (David) - convert old block dio code to page pinning (David, Christoph) - cleanups for pktcdvd (Andy) - cleanups for rnbd (Guoqing) - use the unchecked __bio_add_page() for the initial single page additions (Johannes) - fix overflows in the Amiga partition handling code (Michael) - improve mq-deadline zoned device support (Bart) - keep passthrough requests out of the IO schedulers (Christoph, Ming) - improve support for flush requests, making them less special to deal with (Christoph) - add bdev holder ops and shutdown methods (Christoph) - fix the name_to_dev_t() situation and use cases (Christoph) - decouple the block open flags from fmode_t (Christoph) - ublk updates and cleanups, including adding user copy support (Ming) - BFQ sanity checking (Bart) - convert brd from radix to xarray (Pankaj) - constify various structures (Thomas, Ivan) - more fine grained persistent reservation ioctl capability checks (Jingbo) - misc fixes and cleanups (Arnd, Azeem, Demi, Ed, Hengqi, Hou, Jan, Jordy, Li, Min, Yu, Zhong, Waiman) * tag 'for-6.5/block-2023-06-23' of git://git.kernel.dk/linux: (266 commits) scsi/sg: don't grab scsi host module reference ext4: Fix warning in blkdev_put() block: don't return -EINVAL for not found names in devt_from_devname cdrom: Fix spectre-v1 gadget block: Improve kernel-doc headers blk-mq: don't insert passthrough request into sw queue bsg: make bsg_class a static const structure ublk: make ublk_chr_class a static const structure aoe: make aoe_class a static const structure block/rnbd: make all 'class' structures const block: fix the exclusive open mask in disk_scan_partitions block: add overflow checks for Amiga partition support block: change all __u32 annotations to __be32 in affs_hardblocks.h block: fix signed int overflow in Amiga partition support block: add capacity validation in bdev_add_partition() block: fine-granular CAP_SYS_ADMIN for Persistent Reservation block: disallow Persistent Reservation on partitions reiserfs: fix blkdev_put() warning from release_journal_dev() block: fix wrong mode for blkdev_get_by_dev() from disk_scan_partitions() block: document the holder argument to blkdev_get_by_path ...
Diffstat (limited to 'block/fops.c')
-rw-r--r--block/fops.c63
1 files changed, 41 insertions, 22 deletions
diff --git a/block/fops.c b/block/fops.c
index 4faeada05b23..555b1b9ecd2c 100644
--- a/block/fops.c
+++ b/block/fops.c
@@ -54,7 +54,7 @@ static bool blkdev_dio_unaligned(struct block_device *bdev, loff_t pos,
static ssize_t __blkdev_direct_IO_simple(struct kiocb *iocb,
struct iov_iter *iter, unsigned int nr_pages)
{
- struct block_device *bdev = iocb->ki_filp->private_data;
+ struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
struct bio_vec inline_vecs[DIO_INLINE_BIO_VECS], *vecs;
loff_t pos = iocb->ki_pos;
bool should_dirty = false;
@@ -170,7 +170,7 @@ static void blkdev_bio_end_io(struct bio *bio)
static ssize_t __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
unsigned int nr_pages)
{
- struct block_device *bdev = iocb->ki_filp->private_data;
+ struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
struct blk_plug plug;
struct blkdev_dio *dio;
struct bio *bio;
@@ -310,7 +310,7 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb,
struct iov_iter *iter,
unsigned int nr_pages)
{
- struct block_device *bdev = iocb->ki_filp->private_data;
+ struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
bool is_read = iov_iter_rw(iter) == READ;
blk_opf_t opf = is_read ? REQ_OP_READ : dio_bio_write_op(iocb);
struct blkdev_dio *dio;
@@ -451,7 +451,7 @@ static loff_t blkdev_llseek(struct file *file, loff_t offset, int whence)
static int blkdev_fsync(struct file *filp, loff_t start, loff_t end,
int datasync)
{
- struct block_device *bdev = filp->private_data;
+ struct block_device *bdev = I_BDEV(filp->f_mapping->host);
int error;
error = file_write_and_wait_range(filp, start, end);
@@ -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->private_data)
+ 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;
@@ -483,31 +507,29 @@ static int blkdev_open(struct inode *inode, struct file *filp)
filp->f_flags |= O_LARGEFILE;
filp->f_mode |= FMODE_BUF_RASYNC;
- if (filp->f_flags & O_NDELAY)
- filp->f_mode |= FMODE_NDELAY;
+ /*
+ * Use the file private data to store the holder for exclusive openes.
+ * file_to_blk_mode relies on it being present to set BLK_OPEN_EXCL.
+ */
if (filp->f_flags & O_EXCL)
- filp->f_mode |= FMODE_EXCL;
- if ((filp->f_flags & O_ACCMODE) == 3)
- filp->f_mode |= FMODE_WRITE_IOCTL;
+ filp->private_data = filp;
- bdev = blkdev_get_by_dev(inode->i_rdev, filp->f_mode, filp);
+ bdev = blkdev_get_by_dev(inode->i_rdev, file_to_blk_mode(filp),
+ filp->private_data, NULL);
if (IS_ERR(bdev))
return PTR_ERR(bdev);
if (bdev_nowait(bdev))
filp->f_mode |= FMODE_NOWAIT;
- filp->private_data = bdev;
filp->f_mapping = bdev->bd_inode->i_mapping;
filp->f_wb_err = filemap_sample_wb_err(filp->f_mapping);
return 0;
}
-static int blkdev_close(struct inode *inode, struct file *filp)
+static int blkdev_release(struct inode *inode, struct file *filp)
{
- struct block_device *bdev = filp->private_data;
-
- blkdev_put(bdev, filp->f_mode);
+ blkdev_put(I_BDEV(filp->f_mapping->host), filp->private_data);
return 0;
}
@@ -520,10 +542,9 @@ static int blkdev_close(struct inode *inode, struct file *filp)
*/
static ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
- struct block_device *bdev = iocb->ki_filp->private_data;
+ struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
struct inode *bd_inode = bdev->bd_inode;
loff_t size = bdev_nr_bytes(bdev);
- struct blk_plug plug;
size_t shorted = 0;
ssize_t ret;
@@ -548,18 +569,16 @@ static ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
iov_iter_truncate(from, size);
}
- blk_start_plug(&plug);
ret = __generic_file_write_iter(iocb, from);
if (ret > 0)
ret = generic_write_sync(iocb, ret);
iov_iter_reexpand(from, iov_iter_count(from) + shorted);
- blk_finish_plug(&plug);
return ret;
}
static ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
- struct block_device *bdev = iocb->ki_filp->private_data;
+ struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
loff_t size = bdev_nr_bytes(bdev);
loff_t pos = iocb->ki_pos;
size_t shorted = 0;
@@ -652,7 +671,7 @@ 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;
@@ -693,7 +712,7 @@ static int blkdev_mmap(struct file *file, struct vm_area_struct *vma)
const struct file_operations def_blk_fops = {
.open = blkdev_open,
- .release = blkdev_close,
+ .release = blkdev_release,
.llseek = blkdev_llseek,
.read_iter = blkdev_read_iter,
.write_iter = blkdev_write_iter,