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Code Issues Releases Activity

linux(4): Add F_GETPIPE_SZ fcntl operation which returns the capacity

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of the pipe referred by fd.

Differential Revision:	https://reviews.freebsd.org/D30517
MFC after:		2 weeks
This commit is contained in:
Dmitry Chagin 2021-05-31 22:15:02 +03:00
parent 19593f775c
commit a06c12464b
1 changed files with 18 additions and 0 deletions
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18
sys/compat/linux/linux_file.c
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@ -45,6 +45,8 @@ __FBSDID("$FreeBSD$");
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/selinfo.h>
#include <sys/pipe.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/sx.h>
@ -1524,6 +1526,7 @@ fcntl_common(struct thread *td, struct linux_fcntl_args *args)
{
struct l_flock linux_flock;
struct flock bsd_flock;
struct pipe *fpipe;
struct file *fp;
long arg;
int error, result;
@ -1655,6 +1658,21 @@ fcntl_common(struct thread *td, struct linux_fcntl_args *args)
case LINUX_F_ADD_SEALS:
return (kern_fcntl(td, args->fd, F_ADD_SEALS,
linux_to_bsd_bits(args->arg, seal_bitmap, 0)));
case LINUX_F_GETPIPE_SZ:
error = fget(td, args->fd,
&cap_fcntl_rights, &fp);
if (error != 0)
return (error);
if (fp->f_type != DTYPE_PIPE) {
fdrop(fp, td);
return (EINVAL);
}
fpipe = fp->f_data;
td->td_retval[0] = fpipe->pipe_buffer.size;
fdrop(fp, td);
return (0);
default:
linux_msg(td, "unsupported fcntl cmd %d", args->cmd);
return (EINVAL);