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Introduce vfs_read_dirent() which can help VOP_READDIR() implementations

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by handling all the cookie stuff.
This commit is contained in:
Poul-Henning Kamp 2005-09-12 08:46:07 +00:00
parent 21806f30bc
commit 2883ba6668
2 changed files with 29 additions and 0 deletions
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27
sys/kern/vfs_subr.c
View file

@ -49,6 +49,7 @@ __FBSDID("$FreeBSD$");
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/dirent.h>
#include <sys/event.h>
#include <sys/eventhandler.h>
#include <sys/extattr.h>
@ -3838,3 +3839,29 @@ filt_vfsvnode(struct knote *kn, long hint)
}
return (kn->kn_fflags != 0);
}
int
vfs_read_dirent(struct vop_readdir_args *ap, struct dirent *dp, off_t off)
{
int error;
if (dp->d_reclen > ap->a_uio->uio_resid)
return (ENAMETOOLONG);
error = uiomove(dp, dp->d_reclen, ap->a_uio);
if (error) {
if (ap->a_ncookies != NULL) {
if (ap->a_cookies != NULL)
free(ap->a_cookies, M_TEMP);
ap->a_cookies = NULL;
*ap->a_ncookies = 0;
}
return (error);
}
if (ap->a_ncookies == NULL)
return (0);
*ap->a_cookies = realloc(*ap->a_cookies,
(*ap->a_ncookies + 1) * sizeof(u_long), M_TEMP, M_WAITOK | M_ZERO);
(*ap->a_cookies)[*ap->a_ncookies] = off;
return (0);
}

2
sys/sys/vnode.h
View file

@ -727,6 +727,8 @@ void vfs_hash_rehash(struct vnode *vp, u_int hash);
void vfs_hash_remove(struct vnode *vp);
int vfs_kqfilter(struct vop_kqfilter_args *);
struct dirent;
int vfs_read_dirent(struct vop_readdir_args *ap, struct dirent *dp, off_t off);
#endif /* _KERNEL */