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authorToke Høiland-Jørgensen <toke@redhat.com>2020-12-01 14:54:09 +0100
committerDominique Martinet <asmadeus@codewreck.org>2020-12-01 17:53:49 +0100
commitcf03f316ad20dac16b5adae3f6dedd7d188c7f65 (patch)
treef7e0f3d8ef6c4fe01b9bf750f5d105b56eaec0db /fs/9p
parentb65054597872ce3aefbc6a666385eabdf9e288da (diff)
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fs: 9p: add generic splice_read file operations
The v9fs file operations were missing the splice_read operations, which breaks sendfile() of files on such a filesystem. I discovered this while trying to load an eBPF program using iproute2 inside a 'virtme' environment which uses 9pfs for the virtual file system. iproute2 relies on sendfile() with an AF_ALG socket to hash files, which was erroring out in the virtual environment. Since generic_file_splice_read() seems to just implement splice_read in terms of the read_iter operation, I simply added the generic implementation to the file operations, which fixed the error I was seeing. A quick grep indicates that this is what most other file systems do as well. Link: http://lkml.kernel.org/r/20201201135409.55510-1-toke@redhat.com Fixes: 36e2c7421f02 ("fs: don't allow splice read/write without explicit ops") Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Diffstat (limited to 'fs/9p')
-rw-r--r--fs/9p/vfs_file.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index b177fd3b1eb3..01026b47018c 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -655,6 +655,7 @@ const struct file_operations v9fs_cached_file_operations = {
.release = v9fs_dir_release,
.lock = v9fs_file_lock,
.mmap = v9fs_file_mmap,
+ .splice_read = generic_file_splice_read,
.fsync = v9fs_file_fsync,
};
@@ -667,6 +668,7 @@ const struct file_operations v9fs_cached_file_operations_dotl = {
.lock = v9fs_file_lock_dotl,
.flock = v9fs_file_flock_dotl,
.mmap = v9fs_file_mmap,
+ .splice_read = generic_file_splice_read,
.fsync = v9fs_file_fsync_dotl,
};
@@ -678,6 +680,7 @@ const struct file_operations v9fs_file_operations = {
.release = v9fs_dir_release,
.lock = v9fs_file_lock,
.mmap = generic_file_readonly_mmap,
+ .splice_read = generic_file_splice_read,
.fsync = v9fs_file_fsync,
};
@@ -690,6 +693,7 @@ const struct file_operations v9fs_file_operations_dotl = {
.lock = v9fs_file_lock_dotl,
.flock = v9fs_file_flock_dotl,
.mmap = generic_file_readonly_mmap,
+ .splice_read = generic_file_splice_read,
.fsync = v9fs_file_fsync_dotl,
};
@@ -701,6 +705,7 @@ const struct file_operations v9fs_mmap_file_operations = {
.release = v9fs_dir_release,
.lock = v9fs_file_lock,
.mmap = v9fs_mmap_file_mmap,
+ .splice_read = generic_file_splice_read,
.fsync = v9fs_file_fsync,
};
@@ -713,5 +718,6 @@ const struct file_operations v9fs_mmap_file_operations_dotl = {
.lock = v9fs_file_lock_dotl,
.flock = v9fs_file_flock_dotl,
.mmap = v9fs_mmap_file_mmap,
+ .splice_read = generic_file_splice_read,
.fsync = v9fs_file_fsync_dotl,
};