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author | phk <phk@FreeBSD.org> | 2005-09-12 08:46:07 +0000 |
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committer | phk <phk@FreeBSD.org> | 2005-09-12 08:46:07 +0000 |
commit | 4e50b9ebd8baff78363d11817588ca53e4dbf062 (patch) | |
tree | 7f8b642fd395417090848de585ef5194b216f583 | |
parent | aca041ee53b3ba5759615a7b2b2aee93f1ed8cc2 (diff) | |
download | FreeBSD-src-4e50b9ebd8baff78363d11817588ca53e4dbf062.zip FreeBSD-src-4e50b9ebd8baff78363d11817588ca53e4dbf062.tar.gz |
Introduce vfs_read_dirent() which can help VOP_READDIR() implementations
by handling all the cookie stuff.
-rw-r--r-- | sys/kern/vfs_subr.c | 27 | ||||
-rw-r--r-- | sys/sys/vnode.h | 2 |
2 files changed, 29 insertions, 0 deletions
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c index 19dc538..461ed1a 100644 --- a/sys/kern/vfs_subr.c +++ b/sys/kern/vfs_subr.c @@ -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); +} + diff --git a/sys/sys/vnode.h b/sys/sys/vnode.h index 98b2348..52a1d2f 100644 --- a/sys/sys/vnode.h +++ b/sys/sys/vnode.h @@ -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 */ |