Reflect recent changes in the man, i.e. direct open/accept now would try to remove a file from the fixed file table if the slot they target is already taken. Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx> --- v2: note about replacing existing files man/io_uring_enter.2 | 30 ++++++++++++++++++------------ 1 file changed, 18 insertions(+), 12 deletions(-) diff --git a/man/io_uring_enter.2 b/man/io_uring_enter.2 index ad86961..6b31061 100644 --- a/man/io_uring_enter.2 +++ b/man/io_uring_enter.2 @@ -517,10 +517,12 @@ field is set to a positive number, the file won't be installed into the normal file table as usual but will be placed into the fixed file table at index .I file_index - 1. In this case, instead of returning a file descriptor, the result will contain -either 0 on success or an error. If there is already a file registered at this -index, the request will fail with -.B -EBADF. -Only io_uring has access to such files and no other syscall can use them. See +either 0 on success or an error. If the index points to a valid empty slot, the +installation is guaranteed to not fail. If there is already a file in the slot, +it will be replaced, similar to +.B IORING_OP_FILES_UPDATE. +Please note that only io_uring has access to such files and no other syscall +can use them. See .B IOSQE_FIXED_FILE and .B IORING_REGISTER_FILES. @@ -656,10 +658,12 @@ field is set to a positive number, the file won't be installed into the normal file table as usual but will be placed into the fixed file table at index .I file_index - 1. In this case, instead of returning a file descriptor, the result will contain -either 0 on success or an error. If there is already a file registered at this -index, the request will fail with -.B -EBADF. -Only io_uring has access to such files and no other syscall can use them. See +either 0 on success or an error. If the index points to a valid empty slot, the +installation is guaranteed to not fail. If there is already a file in the slot, +it will be replaced, similar to +.B IORING_OP_FILES_UPDATE. +Please note that only io_uring has access to such files and no other syscall +can use them. See .B IOSQE_FIXED_FILE and .B IORING_REGISTER_FILES. @@ -692,10 +696,12 @@ field is set to a positive number, the file won't be installed into the normal file table as usual but will be placed into the fixed file table at index .I file_index - 1. In this case, instead of returning a file descriptor, the result will contain -either 0 on success or an error. If there is already a file registered at this -index, the request will fail with -.B -EBADF. -Only io_uring has access to such files and no other syscall can use them. See +either 0 on success or an error. If the index points to a valid empty slot, the +installation is guaranteed to not fail. If there is already a file in the slot, +it will be replaced, similar to +.B IORING_OP_FILES_UPDATE. +Please note that only io_uring has access to such files and no other syscall +can use them. See .B IOSQE_FIXED_FILE and .B IORING_REGISTER_FILES. -- 2.33.0
