diff options
author | jhb <jhb@FreeBSD.org> | 2008-01-07 20:05:19 +0000 |
---|---|---|
committer | jhb <jhb@FreeBSD.org> | 2008-01-07 20:05:19 +0000 |
commit | f8a246b9791d1450cf4945cc7b38f651a3a456ee (patch) | |
tree | 4cf9280569e048ce55d457d60918586c5cf023e5 /sys/kern/kern_descrip.c | |
parent | 1b130ab3271ae64d5c2979889a661e27bbe422d9 (diff) | |
download | FreeBSD-src-f8a246b9791d1450cf4945cc7b38f651a3a456ee.zip FreeBSD-src-f8a246b9791d1450cf4945cc7b38f651a3a456ee.tar.gz |
Make ftruncate a 'struct file' operation rather than a vnode operation.
This makes it possible to support ftruncate() on non-vnode file types in
the future.
- 'struct fileops' grows a 'fo_truncate' method to handle an ftruncate() on
a given file descriptor.
- ftruncate() moves to kern/sys_generic.c and now just fetches a file
object and invokes fo_truncate().
- The vnode-specific portions of ftruncate() move to vn_truncate() in
vfs_vnops.c which implements fo_truncate() for vnode file types.
- Non-vnode file types return EINVAL in their fo_truncate() method.
Submitted by: rwatson
Diffstat (limited to 'sys/kern/kern_descrip.c')
-rw-r--r-- | sys/kern/kern_descrip.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sys/kern/kern_descrip.c b/sys/kern/kern_descrip.c index d68854e..24438dd 100644 --- a/sys/kern/kern_descrip.c +++ b/sys/kern/kern_descrip.c @@ -2760,6 +2760,13 @@ badfo_readwrite(struct file *fp, struct uio *uio, struct ucred *active_cred, int } static int +badfo_truncate(struct file *fp, off_t length, struct ucred *active_cred, struct thread *td) +{ + + return (EINVAL); +} + +static int badfo_ioctl(struct file *fp, u_long com, void *data, struct ucred *active_cred, struct thread *td) { @@ -2797,6 +2804,7 @@ badfo_close(struct file *fp, struct thread *td) struct fileops badfileops = { .fo_read = badfo_readwrite, .fo_write = badfo_readwrite, + .fo_truncate = badfo_truncate, .fo_ioctl = badfo_ioctl, .fo_poll = badfo_poll, .fo_kqfilter = badfo_kqfilter, |