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fd: use seqc_read_notmodify when translating fds

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This commit is contained in:
Mateusz Guzik 2021-01-07 07:34:14 +01:00
parent 20ac5cda96
commit 71bd18d373
1 changed files with 3 additions and 7 deletions
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10
sys/kern/kern_descrip.c
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@ -2921,9 +2921,7 @@ fgetvp_lookup_smr(int fd, struct nameidata *ndp, struct vnode **vpp, bool *fsear
fdt = fdp->fd_files;
if (__predict_false((u_int)fd >= fdt->fdt_nfiles))
return (EBADF);
seq = seqc_read_any(fd_seqc(fdt, fd));
if (__predict_false(seqc_in_modify(seq)))
return (EAGAIN);
seq = seqc_read_notmodify(fd_seqc(fdt, fd));
fde = &fdt->fdt_ofiles[fd];
haverights = cap_rights_fde_inline(fde);
fp = fde->fde_file;
@ -3032,7 +3030,7 @@ fget_unlocked_seq(struct filedesc *fdp, int fd, cap_rights_t *needrightsp,
*/
for (;;) {
#ifdef CAPABILITIES
seq = seqc_read(fd_seqc(fdt, fd));
seq = seqc_read_notmodify(fd_seqc(fdt, fd));
fde = &fdt->fdt_ofiles[fd];
haverights = *cap_rights_fde_inline(fde);
fp = fde->fde_file;
@ -3105,9 +3103,7 @@ fget_unlocked(struct filedesc *fdp, int fd, cap_rights_t *needrightsp,
if (__predict_false((u_int)fd >= fdt->fdt_nfiles))
return (EBADF);
#ifdef CAPABILITIES
seq = seqc_read_any(fd_seqc(fdt, fd));
if (__predict_false(seqc_in_modify(seq)))
goto out_fallback;
seq = seqc_read_notmodify(fd_seqc(fdt, fd));
fde = &fdt->fdt_ofiles[fd];
haverights = cap_rights_fde_inline(fde);
fp = fde->fde_file;