d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add missing SMP file locks around read-modify-write operations on

Browse Source 
the flag field.

Reviewed by:	rwatson
This commit is contained in:
Jeffrey Hsu 2003-01-21 20:20:48 +00:00
parent 302b6cd1fe
commit a448a15bc1
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
sys/kern/kern_descrip.c
View File

@ -288,10 +288,12 @@ kern_fcntl(struct thread *td, int fd, int cmd, intptr_t arg)
break;
case F_SETFL:
fhold(fp);
FILE_LOCK(fp);
FILEDESC_UNLOCK(fdp);
fhold_locked(fp);
fp->f_flag &= ~FCNTLFLAGS;
fp->f_flag |= FFLAGS(arg & ~O_ACCMODE) & FCNTLFLAGS;
FILE_UNLOCK(fp);
tmp = fp->f_flag & FNONBLOCK;
error = fo_ioctl(fp, FIONBIO, &tmp, td->td_ucred, td);
if (error) {
@ -304,7 +306,9 @@ kern_fcntl(struct thread *td, int fd, int cmd, intptr_t arg)
fdrop(fp, td);
break;
}
FILE_LOCK(fp);
fp->f_flag &= ~FNONBLOCK;
FILE_UNLOCK(fp);
tmp = 0;
(void)fo_ioctl(fp, FIONBIO, &tmp, td->td_ucred, td);
fdrop(fp, td);