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For posix_fallocate(2) and posix_fadvise(2), return ESPIPE when

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underlying file does not have DFLAG_SEEKABLE set [1].

For posix_fallocate(2), simplify error handling logic.  Do return when
fp is not yet referenced.

Noted by:	bde [1]
Reviewed by:	jhb
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2014-11-12 17:31:38 +00:00
parent 33587684a6
commit 389a25c716
1 changed files with 15 additions and 29 deletions
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42
sys/kern/vfs_syscalls.c
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@ -4553,38 +4553,29 @@ kern_posix_fallocate(struct thread *td, int fd, off_t offset, off_t len)
off_t olen, ooffset;
int error;
fp = NULL;
if (offset < 0 || len <= 0)
return (EINVAL);
/* Check for wrap. */
if (offset > OFF_MAX - len)
return (EFBIG);
error = fget(td, fd, cap_rights_init(&rights, CAP_WRITE), &fp);
if (error != 0)
goto out;
switch (fp->f_type) {
case DTYPE_VNODE:
break;
case DTYPE_PIPE:
case DTYPE_FIFO:
return (error);
if ((fp->f_ops->fo_flags & DFLAG_SEEKABLE) == 0) {
error = ESPIPE;
goto out;
default:
error = ENODEV;
goto out;
}
if ((fp->f_flag & FWRITE) == 0) {
error = EBADF;
goto out;
}
vp = fp->f_vnode;
if (vp->v_type != VREG) {
if (fp->f_type != DTYPE_VNODE) {
error = ENODEV;
goto out;
}
if (offset < 0 || len <= 0) {
error = EINVAL;
goto out;
}
/* Check for wrap. */
if (offset > OFF_MAX - len) {
error = EFBIG;
vp = fp->f_vnode;
if (vp->v_type != VREG) {
error = ENODEV;
goto out;
}
@ -4621,7 +4612,6 @@ kern_posix_fallocate(struct thread *td, int fd, off_t offset, off_t len)
maybe_yield();
}
out:
if (fp != NULL)
fdrop(fp, td);
return (error);
}
@ -4672,15 +4662,11 @@ kern_posix_fadvise(struct thread *td, int fd, off_t offset, off_t len,
error = fget(td, fd, cap_rights_init(&rights), &fp);
if (error != 0)
goto out;
switch (fp->f_type) {
case DTYPE_VNODE:
break;
case DTYPE_PIPE:
case DTYPE_FIFO:
if ((fp->f_ops->fo_flags & DFLAG_SEEKABLE) == 0) {
error = ESPIPE;
goto out;
default:
}
if (fp->f_type != DTYPE_VNODE) {
error = ENODEV;
goto out;
}