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Add RACCT_NOFILE accounting.

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Sponsored by:	The FreeBSD Foundation
Reviewed by:	kib (earlier version)
This commit is contained in:
Edward Tomasz Napierala 2011-04-06 19:13:04 +00:00
parent b1fb5f9c8d
commit 722581d9e6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=220400
2 changed files with 43 additions and 2 deletions
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5
sys/fs/fdescfs/fdesc_vfsops.c
View File

@ -47,6 +47,7 @@
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/racct.h>
#include <sys/resourcevar.h>
#include <sys/vnode.h>
@ -186,6 +187,7 @@ fdesc_statfs(mp, sbp)
int i;
int last;
int freefd;
uint64_t limit;
td = curthread;
@ -200,6 +202,9 @@ fdesc_statfs(mp, sbp)
PROC_UNLOCK(td->td_proc);
fdp = td->td_proc->p_fd;
FILEDESC_SLOCK(fdp);
limit = racct_get_limit(td->td_proc, RACCT_NOFILE);
if (lim > limit)
lim = limit;
last = min(fdp->fd_nfiles, lim);
freefd = 0;
for (i = fdp->fd_freefile; i < last; i++)

40
sys/kern/kern_descrip.c
View File

@ -62,6 +62,7 @@ __FBSDID("$FreeBSD$");
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/protosw.h>
#include <sys/racct.h>
#include <sys/resourcevar.h>
#include <sys/signalvar.h>
#include <sys/socketvar.h>
@ -276,11 +277,15 @@ int
getdtablesize(struct thread *td, struct getdtablesize_args *uap)
{
struct proc *p = td->td_proc;
uint64_t lim;
PROC_LOCK(p);
td->td_retval[0] =
min((int)lim_cur(p, RLIMIT_NOFILE), maxfilesperproc);
lim = racct_get_limit(td->td_proc, RACCT_NOFILE);
PROC_UNLOCK(p);
if (lim < td->td_retval[0])
td->td_retval[0] = lim;
return (0);
}
@ -793,8 +798,25 @@ do_dup(struct thread *td, int flags, int old, int new,
* out for a race.
*/
if (flags & DUP_FIXED) {
if (new >= fdp->fd_nfiles)
if (new >= fdp->fd_nfiles) {
/*
* The resource limits are here instead of e.g. fdalloc(),
* because the file descriptor table may be shared between
* processes, so we can't really use racct_add()/racct_sub().
* Instead of counting the number of actually allocated
* descriptors, just put the limit on the size of the file
* descriptor table.
*/
PROC_LOCK(p);
error = racct_set(p, RACCT_NOFILE, new + 1);
PROC_UNLOCK(p);
if (error != 0) {
FILEDESC_XUNLOCK(fdp);
fdrop(fp, td);
return (EMFILE);
}
fdgrowtable(fdp, new + 1);
}
if (fdp->fd_ofiles[new] == NULL)
fdused(fdp, new);
} else {
@ -1440,7 +1462,7 @@ fdalloc(struct thread *td, int minfd, int *result)
{
struct proc *p = td->td_proc;
struct filedesc *fdp = p->p_fd;
int fd = -1, maxfd;
int fd = -1, maxfd, error;
FILEDESC_XLOCK_ASSERT(fdp);
@ -1463,6 +1485,11 @@ fdalloc(struct thread *td, int minfd, int *result)
return (EMFILE);
if (fd < fdp->fd_nfiles)
break;
PROC_LOCK(p);
error = racct_set(p, RACCT_NOFILE, min(fdp->fd_nfiles * 2, maxfd));
PROC_UNLOCK(p);
if (error != 0)
return (EMFILE);
fdgrowtable(fdp, min(fdp->fd_nfiles * 2, maxfd));
}
@ -1494,6 +1521,11 @@ fdavail(struct thread *td, int n)
FILEDESC_LOCK_ASSERT(fdp);
/*
* XXX: This is only called from uipc_usrreq.c:unp_externalize();
* call racct_add() from there instead of dealing with containers
* here.
*/
PROC_LOCK(p);
lim = min((int)lim_cur(p, RLIMIT_NOFILE), maxfilesperproc);
PROC_UNLOCK(p);
@ -1742,6 +1774,10 @@ fdfree(struct thread *td)
if (fdp == NULL)
return;
PROC_LOCK(td->td_proc);
racct_set(td->td_proc, RACCT_NOFILE, 0);
PROC_UNLOCK(td->td_proc);
/* Check for special need to clear POSIX style locks */
fdtol = td->td_proc->p_fdtol;
if (fdtol != NULL) {