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Fix and complete the AIO syscalls. There are some performance enhancements

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coming up soon, but the code is functional.  Docs will be forthcoming.
This commit is contained in:
John Dyson 1997-11-29 01:33:10 +00:00
parent 873954b327
commit fd3bf77574
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=31443
3 changed files with 807 additions and 309 deletions
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20
sys/kern/kern_descrip.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)kern_descrip.c 8.6 (Berkeley) 4/19/94
* $Id: kern_descrip.c,v 1.44 1997/11/23 10:43:43 bde Exp $
* $Id: kern_descrip.c,v 1.45 1997/11/23 12:24:59 bde Exp $
*/
#include <sys/param.h>
@ -744,6 +744,12 @@ fdcopy(p)
register struct file **fpp;
register int i;
/*
* Certain daemons might not have file descriptors
*/
if (fdp == NULL)
return NULL;
MALLOC(newfdp, struct filedesc *, sizeof(struct filedesc0),
M_FILEDESC, M_WAITOK);
bcopy(fdp, newfdp, sizeof(struct filedesc));
@ -797,6 +803,12 @@ fdfree(p)
struct file **fpp;
register int i;
/*
* Certain daemons might not have file descriptors
*/
if (fdp == NULL)
return;
if (--fdp->fd_refcnt > 0)
return;
fpp = fdp->fd_ofiles;
@ -823,6 +835,12 @@ fdcloseexec(p)
char *fdfp;
register int i;
/*
* Certain daemons might not have file descriptors
*/
if (fdp == NULL)
return;
fpp = fdp->fd_ofiles;
fdfp = fdp->fd_ofileflags;
for (i = 0; i <= fdp->fd_lastfile; i++, fpp++, fdfp++)

1085
sys/kern/vfs_aio.c
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File diff suppressed because it is too large Load Diff

7
sys/kern/vfs_vnops.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_vnops.c 8.2 (Berkeley) 1/21/94
* $Id: vfs_vnops.c,v 1.40 1997/10/27 15:26:23 bde Exp $
* $Id: vfs_vnops.c,v 1.41 1997/11/07 08:53:11 phk Exp $
*/
#include <sys/param.h>
@ -276,7 +276,8 @@ vn_read(fp, uio, cred)
VOP_LEASE(vp, p, cred, LEASE_READ);
vn_lock(vp, LK_SHARED | LK_NOPAUSE | LK_RETRY, p);
uio->uio_offset = fp->f_offset;
if (uio->uio_offset == -1)
uio->uio_offset = fp->f_offset;
count = uio->uio_resid;
flag = 0;
if (fp->f_flag & FNONBLOCK)
@ -329,7 +330,7 @@ vn_write(fp, uio, cred)
struct proc *p = uio->uio_procp;
int count, error, ioflag = IO_UNIT;
if (vp->v_type == VREG && (fp->f_flag & O_APPEND))
if (uio->uio_offset == -1 && vp->v_type == VREG && (fp->f_flag & O_APPEND))
ioflag |= IO_APPEND;
if (fp->f_flag & FNONBLOCK)
ioflag |= IO_NDELAY;