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| author | David Howells <dhowells@redhat.com> | 2023-05-22 15:50:02 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-05-24 16:42:16 +0200 |
| commit | d96d96eebb06d41010a86cf56b4d9ea47f597152 (patch) | |
| tree | 93ec4b7f8554846e662c39f1630d989a5bdfd470 /fs/afs/file.c | |
| parent | 9p: Add splice_read wrapper (diff) | |
| download | linux-d96d96eebb06d41010a86cf56b4d9ea47f597152.tar.xz linux-d96d96eebb06d41010a86cf56b4d9ea47f597152.zip | |
afs: Provide a splice-read wrapper
Provide a splice_read wrapper for AFS to call afs_validate() before going
into generic_file_splice_read() so that we're likely to have a callback
promise from the server.
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: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-block@vger.kernel.org
cc: linux-mm@kvack.org
Link: https://lore.kernel.org/r/20230522135018.2742245-16-dhowells@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/afs/file.c')
| -rw-r--r-- | fs/afs/file.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/fs/afs/file.c b/fs/afs/file.c index 719b31374879..d8a6b09dadf7 100644 --- a/fs/afs/file.c +++ b/fs/afs/file.c @@ -25,6 +25,9 @@ static void afs_invalidate_folio(struct folio *folio, size_t offset, static bool afs_release_folio(struct folio *folio, gfp_t gfp_flags); static ssize_t afs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter); +static ssize_t afs_file_splice_read(struct file *in, loff_t *ppos, + struct pipe_inode_info *pipe, + size_t len, unsigned int flags); static void afs_vm_open(struct vm_area_struct *area); static void afs_vm_close(struct vm_area_struct *area); static vm_fault_t afs_vm_map_pages(struct vm_fault *vmf, pgoff_t start_pgoff, pgoff_t end_pgoff); @@ -36,7 +39,7 @@ const struct file_operations afs_file_operations = { .read_iter = afs_file_read_iter, .write_iter = afs_file_write, .mmap = afs_file_mmap, - .splice_read = generic_file_splice_read, + .splice_read = afs_file_splice_read, .splice_write = iter_file_splice_write, .fsync = afs_fsync, .lock = afs_lock, @@ -587,3 +590,18 @@ static ssize_t afs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter) return generic_file_read_iter(iocb, iter); } + +static ssize_t afs_file_splice_read(struct file *in, loff_t *ppos, + struct pipe_inode_info *pipe, + size_t len, unsigned int flags) +{ + struct afs_vnode *vnode = AFS_FS_I(file_inode(in)); + struct afs_file *af = in->private_data; + int ret; + + ret = afs_validate(vnode, af->key); + if (ret < 0) + return ret; + + return generic_file_splice_read(in, ppos, pipe, len, flags); +} |