diff options
author | kib <kib@FreeBSD.org> | 2012-08-22 20:05:34 +0000 |
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committer | kib <kib@FreeBSD.org> | 2012-08-22 20:05:34 +0000 |
commit | 9d2e20143f198869149c9e2dc114da6153f2df12 (patch) | |
tree | 680839fceab7454a9813e3b941e8a18ac21baf37 /sys/kern | |
parent | 9e9c95ef1d9199a55e30c8f9f85adc3e3f2d19eb (diff) | |
download | FreeBSD-src-9d2e20143f198869149c9e2dc114da6153f2df12.zip FreeBSD-src-9d2e20143f198869149c9e2dc114da6153f2df12.tar.gz |
Provide some compat32 shims for sysctl vfs.conflist. It is required
for getvfsbyname(3) operation when called from 32bit process, and
getvfsbyname(3) is used by recent bsdtar import.
Reported by: many
Tested by: David Naylor <naylor.b.david@gmail.com>
MFC after: 5 days
Diffstat (limited to 'sys/kern')
-rw-r--r-- | sys/kern/vfs_subr.c | 65 |
1 files changed, 49 insertions, 16 deletions
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c index 1d6136a..631d3f2 100644 --- a/sys/kern/vfs_subr.c +++ b/sys/kern/vfs_subr.c @@ -41,6 +41,7 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); +#include "opt_compat.h" #include "opt_ddb.h" #include "opt_watchdog.h" @@ -3111,21 +3112,49 @@ DB_SHOW_COMMAND(mount, db_show_mount) /* * Fill in a struct xvfsconf based on a struct vfsconf. */ -static void -vfsconf2x(struct vfsconf *vfsp, struct xvfsconf *xvfsp) +static int +vfsconf2x(struct sysctl_req *req, struct vfsconf *vfsp) { + struct xvfsconf xvfsp; - strcpy(xvfsp->vfc_name, vfsp->vfc_name); - xvfsp->vfc_typenum = vfsp->vfc_typenum; - xvfsp->vfc_refcount = vfsp->vfc_refcount; - xvfsp->vfc_flags = vfsp->vfc_flags; + bzero(&xvfsp, sizeof(xvfsp)); + strcpy(xvfsp.vfc_name, vfsp->vfc_name); + xvfsp.vfc_typenum = vfsp->vfc_typenum; + xvfsp.vfc_refcount = vfsp->vfc_refcount; + xvfsp.vfc_flags = vfsp->vfc_flags; /* * These are unused in userland, we keep them * to not break binary compatibility. */ - xvfsp->vfc_vfsops = NULL; - xvfsp->vfc_next = NULL; + xvfsp.vfc_vfsops = NULL; + xvfsp.vfc_next = NULL; + return (SYSCTL_OUT(req, &xvfsp, sizeof(xvfsp))); +} + +#ifdef COMPAT_FREEBSD32 +struct xvfsconf32 { + uint32_t vfc_vfsops; + char vfc_name[MFSNAMELEN]; + int32_t vfc_typenum; + int32_t vfc_refcount; + int32_t vfc_flags; + uint32_t vfc_next; +}; + +static int +vfsconf2x32(struct sysctl_req *req, struct vfsconf *vfsp) +{ + struct xvfsconf32 xvfsp; + + strcpy(xvfsp.vfc_name, vfsp->vfc_name); + xvfsp.vfc_typenum = vfsp->vfc_typenum; + xvfsp.vfc_refcount = vfsp->vfc_refcount; + xvfsp.vfc_flags = vfsp->vfc_flags; + xvfsp.vfc_vfsops = 0; + xvfsp.vfc_next = 0; + return (SYSCTL_OUT(req, &xvfsp, sizeof(xvfsp))); } +#endif /* * Top level filesystem related information gathering. @@ -3134,14 +3163,16 @@ static int sysctl_vfs_conflist(SYSCTL_HANDLER_ARGS) { struct vfsconf *vfsp; - struct xvfsconf xvfsp; int error; error = 0; TAILQ_FOREACH(vfsp, &vfsconf, vfc_list) { - bzero(&xvfsp, sizeof(xvfsp)); - vfsconf2x(vfsp, &xvfsp); - error = SYSCTL_OUT(req, &xvfsp, sizeof xvfsp); +#ifdef COMPAT_FREEBSD32 + if (req->flags & SCTL_MASK32) + error = vfsconf2x32(req, vfsp); + else +#endif + error = vfsconf2x(req, vfsp); if (error) break; } @@ -3161,7 +3192,6 @@ vfs_sysctl(SYSCTL_HANDLER_ARGS) int *name = (int *)arg1 - 1; /* XXX */ u_int namelen = arg2 + 1; /* XXX */ struct vfsconf *vfsp; - struct xvfsconf xvfsp; log(LOG_WARNING, "userland calling deprecated sysctl, " "please rebuild world\n"); @@ -3185,9 +3215,12 @@ vfs_sysctl(SYSCTL_HANDLER_ARGS) break; if (vfsp == NULL) return (EOPNOTSUPP); - bzero(&xvfsp, sizeof(xvfsp)); - vfsconf2x(vfsp, &xvfsp); - return (SYSCTL_OUT(req, &xvfsp, sizeof(xvfsp))); +#ifdef COMPAT_FREEBSD32 + if (req->flags & SCTL_MASK32) + return (vfsconf2x32(req, vfsp)); + else +#endif + return (vfsconf2x(req, vfsp)); } return (EOPNOTSUPP); } |