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authorChristoph Hellwig <hch@lst.de>2023-06-08 13:02:57 +0200
committerJens Axboe <axboe@kernel.dk>2023-06-12 16:04:05 +0200
commitee3249a8ce78ef014a71b05157a43fba8dc764e3 (patch)
treeb7abc4d3984baa442590cb06c8df8ae94f5ccdf0 /block/fops.c
parentblock: always use I_BDEV on file->f_mapping->host to find the bdev (diff)
downloadlinux-ee3249a8ce78ef014a71b05157a43fba8dc764e3.tar.xz
linux-ee3249a8ce78ef014a71b05157a43fba8dc764e3.zip
block: store the holder in file->private_data
Store the file struct used as the holder in file->private_data as an indicator that this file descriptor was opened exclusively to remove the last use of FMODE_EXCL. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Link: https://lore.kernel.org/r/20230608110258.189493-30-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/fops.c')
-rw-r--r--block/fops.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/block/fops.c b/block/fops.c
index 0d714d050a46..9871bd6052b4 100644
--- a/block/fops.c
+++ b/block/fops.c
@@ -478,7 +478,7 @@ blk_mode_t file_to_blk_mode(struct file *file)
mode |= BLK_OPEN_READ;
if (file->f_mode & FMODE_WRITE)
mode |= BLK_OPEN_WRITE;
- if (file->f_mode & FMODE_EXCL)
+ if (file->private_data)
mode |= BLK_OPEN_EXCL;
if (file->f_flags & O_NDELAY)
mode |= BLK_OPEN_NDELAY;
@@ -507,12 +507,15 @@ static int blkdev_open(struct inode *inode, struct file *filp)
filp->f_flags |= O_LARGEFILE;
filp->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC;
+ /*
+ * 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;
+ filp->private_data = filp;
bdev = blkdev_get_by_dev(inode->i_rdev, file_to_blk_mode(filp),
- (filp->f_mode & FMODE_EXCL) ? filp : NULL,
- NULL);
+ filp->private_data, NULL);
if (IS_ERR(bdev))
return PTR_ERR(bdev);
@@ -523,8 +526,7 @@ static int blkdev_open(struct inode *inode, struct file *filp)
static int blkdev_release(struct inode *inode, struct file *filp)
{
- blkdev_put(I_BDEV(filp->f_mapping->host),
- (filp->f_mode & FMODE_EXCL) ? filp : NULL);
+ blkdev_put(I_BDEV(filp->f_mapping->host), filp->private_data);
return 0;
}