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fd: move fd table sizing out of fdinit

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now it is placed with the rest of actual initialisation
This commit is contained in:
Mateusz Guzik 2022-01-29 23:07:06 +01:00
parent 4103c3cd5b
commit 893d20c95a
4 changed files with 15 additions and 29 deletions
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2
sys/kern/init_main.c
View File

@ -568,7 +568,7 @@ proc0_init(void *dummy __unused)
/* Create the file descriptor table. */
p->p_pd = pdinit(NULL, false);
p->p_fd = fdinit(NULL, false, NULL);
p->p_fd = fdinit();
p->p_fdtol = NULL;
/* Create the limits structures. */

36
sys/kern/kern_descrip.c
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@ -2150,16 +2150,11 @@ finstall(struct thread *td, struct file *fp, int *fd, int flags,
* If fdp is not NULL, return with it shared locked.
*/
struct filedesc *
fdinit(struct filedesc *fdp, bool prepfiles, int *lastfile)
fdinit(void)
{
struct filedesc0 *newfdp0;
struct filedesc *newfdp;
if (prepfiles)
MPASS(lastfile != NULL);
else
MPASS(lastfile == NULL);
newfdp0 = uma_zalloc(filedesc0_zone, M_WAITOK | M_ZERO);
newfdp = &newfdp0->fd_fd;
@ -2171,24 +2166,6 @@ fdinit(struct filedesc *fdp, bool prepfiles, int *lastfile)
newfdp->fd_files = (struct fdescenttbl *)&newfdp0->fd_dfiles;
newfdp->fd_files->fdt_nfiles = NDFILE;
if (fdp == NULL)
return (newfdp);
FILEDESC_SLOCK(fdp);
if (!prepfiles) {
FILEDESC_SUNLOCK(fdp);
return (newfdp);
}
for (;;) {
*lastfile = fdlastfile(fdp);
if (*lastfile < newfdp->fd_nfiles)
break;
FILEDESC_SUNLOCK(fdp);
fdgrowtable(newfdp, *lastfile + 1);
FILEDESC_SLOCK(fdp);
}
return (newfdp);
}
@ -2368,7 +2345,16 @@ fdcopy(struct filedesc *fdp)
MPASS(fdp != NULL);
newfdp = fdinit(fdp, true, &lastfile);
newfdp = fdinit();
FILEDESC_SLOCK(fdp);
for (;;) {
lastfile = fdlastfile(fdp);
if (lastfile < newfdp->fd_nfiles)
break;
FILEDESC_SUNLOCK(fdp);
fdgrowtable(newfdp, lastfile + 1);
FILEDESC_SLOCK(fdp);
}
/* copy all passable descriptors (i.e. not kqueue) */
newfdp->fd_freefile = -1;
for (i = 0; i <= lastfile; ++i) {

4
sys/kern/kern_fork.c
View File

@ -340,7 +340,7 @@ fork_norfproc(struct thread *td, int flags)
struct filedesc *fdtmp;
struct pwddesc *pdtmp;
pdtmp = pdinit(td->td_proc->p_pd, false);
fdtmp = fdinit(td->td_proc->p_fd, false, NULL);
fdtmp = fdinit();
pdescfree(td);
fdescfree(td);
p1->p_fd = fdtmp;
@ -418,7 +418,7 @@ do_fork(struct thread *td, struct fork_req *fr, struct proc *p2, struct thread *
*/
if (fr->fr_flags & RFCFDG) {
pd = pdinit(p1->p_pd, false);
fd = fdinit(p1->p_fd, false, NULL);
fd = fdinit();
fdtol = NULL;
} else if (fr->fr_flags & RFFDG) {
if (fr->fr_flags2 & FR2_SHARE_PATHS)

2
sys/sys/filedesc.h
View File

@ -254,7 +254,7 @@ void fdunshare(struct thread *td);
void fdescfree(struct thread *td);
int fdlastfile(struct filedesc *fdp);
int fdlastfile_single(struct filedesc *fdp);
struct filedesc *fdinit(struct filedesc *fdp, bool prepfiles, int *lastfile);
struct filedesc *fdinit(void);
struct filedesc *fdshare(struct filedesc *fdp);
struct filedesc_to_leader *
filedesc_to_leader_alloc(struct filedesc_to_leader *old,