Differential D32332 Diff 96315 sys/fs/fuse/fuse_vfsops.c

Changeset View

Standalone View

sys/fs/fuse/fuse_vfsops.c

Show First 20 Lines • Show All 533 Lines • ▼ Show 20 Lines
{		{
struct fuse_data *data = fuse_get_mpdata(mp);		struct fuse_data *data = fuse_get_mpdata(mp);
uint64_t nodeid = ino;		uint64_t nodeid = ino;
struct thread *td = curthread;		struct thread *td = curthread;
struct fuse_dispatcher fdi;		struct fuse_dispatcher fdi;
struct fuse_entry_out *feo;		struct fuse_entry_out *feo;
struct fuse_vnode_data *fvdat;		struct fuse_vnode_data *fvdat;
const char dot[] = ".";		const char dot[] = ".";
off_t filesize;
enum vtype vtyp;		enum vtype vtyp;
int error;		int error;

if (!(data->dataflags & FSESS_EXPORT_SUPPORT)) {		if (!(data->dataflags & FSESS_EXPORT_SUPPORT)) {
/*		/*
* Unreachable unless you do something stupid, like export a		* Unreachable unless you do something stupid, like export a
* nullfs mount of a fusefs file system.		* nullfs mount of a fusefs file system.
*/		*/
Show All 20 Lines	if (feo->nodeid == 0) {
error = ENOENT;		error = ENOENT;
goto out;		goto out;
}		}

vtyp = IFTOVT(feo->attr.mode);		vtyp = IFTOVT(feo->attr.mode);
error = fuse_vnode_get(mp, feo, nodeid, NULL, vpp, NULL, vtyp);		error = fuse_vnode_get(mp, feo, nodeid, NULL, vpp, NULL, vtyp);
if (error)		if (error)
goto out;		goto out;
filesize = feo->attr.size;

/*
* In the case where we are looking up a FUSE node represented by an
* existing cached vnode, and the true size reported by FUSE_LOOKUP
* doesn't match the vnode's cached size, then any cached writes beyond
* the file's current size are lost.
*
* We can get here:
* * following attribute cache expiration, or
* * due a bug in the daemon, or
*/
fvdat = VTOFUD(*vpp);		fvdat = VTOFUD(*vpp);
if (vnode_isreg(*vpp) &&
filesize != fvdat->cached_attrs.va_size &&
fvdat->flag & FN_SIZECHANGE) {
if (data->cache_mode == fuse_data_cache_mode) {
const char *msg;

if (fuse_libabi_geq(data, 7, 23)) {
msg = "writeback cache incoherent!."
"To prevent data corruption, disable "
"the writeback cache according to your "
"FUSE server's documentation.";
} else {
msg = "writeback cache incoherent!."
"To prevent data corruption, disable "
"the writeback cache by setting "
"vfs.fusefs.data_cache_mode to 0 or 1.";
}
fuse_warn(data, FSESS_WARN_WB_CACHE_INCOHERENT, msg);
} else {
/* If we get here, it's likely a fusefs kernel bug */
printf("%s: WB cache incoherent on %s!\n", __func__,
vnode_mount(*vpp)->mnt_stat.f_mntonname);
}
fvdat->flag &= ~FN_SIZECHANGE;
}

fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid,		fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid,
feo->attr_valid_nsec, NULL);		feo->attr_valid_nsec, NULL, true);
fuse_validity_2_bintime(feo->entry_valid, feo->entry_valid_nsec,		fuse_validity_2_bintime(feo->entry_valid, feo->entry_valid_nsec,
&fvdat->entry_cache_timeout);		&fvdat->entry_cache_timeout);
out:		out:
fdisp_destroy(&fdi);		fdisp_destroy(&fdi);
return error;		return error;
}		}

static int		static int
▲ Show 20 Lines • Show All 89 Lines • Show Last 20 Lines