diff options
| author | David Howells | 2023-05-22 14:50:08 +0100 |
|---|---|---|
| committer | Jens Axboe | 2023-05-24 08:42:16 -0600 |
| commit | 51494398807111ee0f78e03c485c422195f8cf98 (patch) | |
| tree | 3fe7d0f2219c9c0a48fe069efdfcc4a2055ccedc /fs/ntfs3 | |
| parent | a7db503401eecfdab4fa6e7df9dd7214cb8759a4 (diff) | |
ntfs3: Provide a splice-read wrapper
Provide a splice_read wrapper for NTFS3 to perform various checks before
allowing the operation to proceed.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Christoph Hellwig <hch@lst.de>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
cc: ntfs3@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
cc: linux-block@vger.kernel.org
cc: linux-mm@kvack.org
Link: https://lore.kernel.org/r/20230522135018.2742245-22-dhowells@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/ntfs3')
| -rw-r--r-- | fs/ntfs3/file.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c index 9a3d55c367d9..667c9dc68b58 100644 --- a/fs/ntfs3/file.c +++ b/fs/ntfs3/file.c @@ -744,6 +744,35 @@ static ssize_t ntfs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter) return generic_file_read_iter(iocb, iter); } +static ssize_t ntfs_file_splice_read(struct file *in, loff_t *ppos, + struct pipe_inode_info *pipe, + size_t len, unsigned int flags) +{ + struct inode *inode = in->f_mapping->host; + struct ntfs_inode *ni = ntfs_i(inode); + + if (is_encrypted(ni)) { + ntfs_inode_warn(inode, "encrypted i/o not supported"); + return -EOPNOTSUPP; + } + +#ifndef CONFIG_NTFS3_LZX_XPRESS + if (ni->ni_flags & NI_FLAG_COMPRESSED_MASK) { + ntfs_inode_warn( + inode, + "activate CONFIG_NTFS3_LZX_XPRESS to read external compressed files"); + return -EOPNOTSUPP; + } +#endif + + if (is_dedup(ni)) { + ntfs_inode_warn(inode, "read deduplicated not supported"); + return -EOPNOTSUPP; + } + + return generic_file_splice_read(in, ppos, pipe, len, flags); +} + /* * ntfs_get_frame_pages * @@ -1159,7 +1188,7 @@ const struct file_operations ntfs_file_operations = { #ifdef CONFIG_COMPAT .compat_ioctl = ntfs_compat_ioctl, #endif - .splice_read = generic_file_splice_read, + .splice_read = ntfs_file_splice_read, .mmap = ntfs_file_mmap, .open = ntfs_file_open, .fsync = generic_file_fsync, |