The AF_XDP sockets umem mapping interface uses XDP_UMEM_PGOFF_FILL_RING and XDP_UMEM_PGOFF_COMPLETION_RING offsets. The offsets seems like are established already and are part of configuration interface. But for 32-bit systems, while AF_XDP socket configuration, the values are to large to pass maximum allowed file size verification. The offsets can be tuned ofc, but instead of changing existent interface - extend max allowed file size for sockets. The 64-bit systems seems like ok with this, so extend threshold only for 32-bits for now. Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@xxxxxxxxxx> --- Based on bpf-next/master mm/mmap.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/mm/mmap.c b/mm/mmap.c index 7e8c3e8ae75f..238ce6b71405 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1358,6 +1358,11 @@ static inline u64 file_mmap_size_max(struct file *file, struct inode *inode) if (S_ISBLK(inode->i_mode)) return MAX_LFS_FILESIZE; +#if BITS_PER_LONG == 32 + if (S_ISSOCK(inode->i_mode)) + return MAX_LFS_FILESIZE; +#endif + /* Special "we do even unsigned file positions" case */ if (file->f_mode & FMODE_UNSIGNED_OFFSET) return 0; -- 2.17.1
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