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| author | Al Viro <viro@zeniv.linux.org.uk> | 2024-05-02 17:36:32 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2024-05-02 17:39:44 -0400 |
| commit | d18a8679581e8d1166b68e211d16c5349ae8c38c (patch) | |
| tree | efdb0b8ed78c16bb97ce8ed3ae0576bec29278f7 | |
| parent | ead083aeeed9df44fab9227e47688f7305c3a233 (diff) | |
| download | vfs-work.set_blocksize.tar.gz | |
make set_blocksize() fail unless block device is opened exclusivework.set_blocksize
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | Documentation/filesystems/porting.rst | 7 | ||||
| -rw-r--r-- | block/bdev.c | 3 |
2 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst index 1be76ef117b3f8..5503d5c614a7b7 100644 --- a/Documentation/filesystems/porting.rst +++ b/Documentation/filesystems/porting.rst @@ -1134,3 +1134,10 @@ superblock of the main block device, i.e., the one stored in sb->s_bdev. Block device freezing now works for any block device owned by a given superblock, not just the main block device. The get_active_super() helper and bd_fsfreeze_sb pointer are gone. + +--- + +**mandatory** + +set_blocksize() takes opened struct file instead of struct block_device now +and it *must* be opened exclusive. diff --git a/block/bdev.c b/block/bdev.c index a329ff9be11d8c..a89bce368b64f5 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -157,6 +157,9 @@ int set_blocksize(struct file *file, int size) if (size < bdev_logical_block_size(bdev)) return -EINVAL; + if (!file->private_data) + return -EINVAL; + /* Don't change the size if it is same as current */ if (inode->i_blkbits != blksize_bits(size)) { sync_blockdev(bdev); |