Merge commit 'refs/top-bases/linux-configure-branch' into linux-configure-branch
This commit is contained in:
Brian Behlendorf
commit
d36a1b1721
|
|
@ -57,6 +57,33 @@ struct traverse_data {
|
|||
void *td_arg;
|
||||
};
|
||||
|
||||
struct traverse_visitbp_data {
|
||||
/* Function arguments */
|
||||
struct traverse_data *tv_td;
|
||||
const dnode_phys_t *tv_dnp;
|
||||
arc_buf_t *tv_pbuf;
|
||||
blkptr_t *tv_bp;
|
||||
const zbookmark_t *tv_zb;
|
||||
/* Local variables */
|
||||
struct prefetch_data *tv_pd;
|
||||
zbookmark_t tv_czb;
|
||||
arc_buf_t *tv_buf;
|
||||
boolean_t tv_hard;
|
||||
objset_phys_t *tv_osp;
|
||||
dnode_phys_t *tv_ldnp;
|
||||
blkptr_t *tv_cbp;
|
||||
uint32_t tv_flags;
|
||||
int tv_err;
|
||||
int tv_lasterr;
|
||||
int tv_i;
|
||||
int tv_epb;
|
||||
#ifdef DEBUG
|
||||
int tv_depth;
|
||||
#endif
|
||||
};
|
||||
|
||||
static inline int traverse_visitbp(struct traverse_data *td, const
|
||||
dnode_phys_t *dnp, arc_buf_t *pbuf, blkptr_t *bp, const zbookmark_t *zb);
|
||||
static int traverse_dnode(struct traverse_data *td, const dnode_phys_t *dnp,
|
||||
arc_buf_t *buf, uint64_t objset, uint64_t object);
|
||||
|
||||
|
|
@ -128,137 +155,191 @@ traverse_zil(struct traverse_data *td, zil_header_t *zh)
|
|||
zil_free(zilog);
|
||||
}
|
||||
|
||||
static int
|
||||
traverse_visitbp(struct traverse_data *td, const dnode_phys_t *dnp,
|
||||
arc_buf_t *pbuf, blkptr_t *bp, const zbookmark_t *zb)
|
||||
{
|
||||
zbookmark_t czb;
|
||||
int err = 0, lasterr = 0;
|
||||
arc_buf_t *buf = NULL;
|
||||
struct prefetch_data *pd = td->td_pfd;
|
||||
boolean_t hard = td->td_flags & TRAVERSE_HARD;
|
||||
#define TRAVERSE_VISITBP_MAX_DEPTH 20
|
||||
|
||||
if (bp->blk_birth == 0) {
|
||||
err = td->td_func(td->td_spa, NULL, NULL, pbuf, zb, dnp,
|
||||
td->td_arg);
|
||||
return (err);
|
||||
static void
|
||||
__traverse_visitbp_init(struct traverse_visitbp_data *tv,
|
||||
struct traverse_data *td, const dnode_phys_t *dnp,
|
||||
arc_buf_t *pbuf, blkptr_t *bp, const zbookmark_t *zb, int depth)
|
||||
{
|
||||
tv->tv_td = td;
|
||||
tv->tv_dnp = dnp;
|
||||
tv->tv_pbuf = pbuf;
|
||||
tv->tv_bp = bp;
|
||||
tv->tv_zb = zb;
|
||||
tv->tv_err = 0;
|
||||
tv->tv_lasterr = 0;
|
||||
tv->tv_buf = NULL;
|
||||
tv->tv_pd = td->td_pfd;
|
||||
tv->tv_hard = td->td_flags & TRAVERSE_HARD;
|
||||
tv->tv_flags = ARC_WAIT;
|
||||
tv->tv_depth = depth;
|
||||
}
|
||||
|
||||
static noinline int
|
||||
__traverse_visitbp(struct traverse_visitbp_data *tv)
|
||||
{
|
||||
ASSERT3S(tv->tv_depth, <, TRAVERSE_VISITBP_MAX_DEPTH);
|
||||
|
||||
if (tv->tv_bp->blk_birth == 0) {
|
||||
tv->tv_err = tv->tv_td->td_func(tv->tv_td->td_spa, NULL, NULL,
|
||||
tv->tv_pbuf, tv->tv_zb, tv->tv_dnp, tv->tv_td->td_arg);
|
||||
return (tv->tv_err);
|
||||
}
|
||||
|
||||
if (bp->blk_birth <= td->td_min_txg)
|
||||
if (tv->tv_bp->blk_birth <= tv->tv_td->td_min_txg)
|
||||
return (0);
|
||||
|
||||
if (pd && !pd->pd_exited &&
|
||||
((pd->pd_flags & TRAVERSE_PREFETCH_DATA) ||
|
||||
BP_GET_TYPE(bp) == DMU_OT_DNODE || BP_GET_LEVEL(bp) > 0)) {
|
||||
mutex_enter(&pd->pd_mtx);
|
||||
ASSERT(pd->pd_blks_fetched >= 0);
|
||||
while (pd->pd_blks_fetched == 0 && !pd->pd_exited)
|
||||
cv_wait(&pd->pd_cv, &pd->pd_mtx);
|
||||
pd->pd_blks_fetched--;
|
||||
cv_broadcast(&pd->pd_cv);
|
||||
mutex_exit(&pd->pd_mtx);
|
||||
if (tv->tv_pd && !tv->tv_pd->pd_exited &&
|
||||
((tv->tv_pd->pd_flags & TRAVERSE_PREFETCH_DATA) ||
|
||||
BP_GET_TYPE(tv->tv_bp) == DMU_OT_DNODE ||
|
||||
BP_GET_LEVEL(tv->tv_bp) > 0)) {
|
||||
mutex_enter(&tv->tv_pd->pd_mtx);
|
||||
ASSERT(tv->tv_pd->pd_blks_fetched >= 0);
|
||||
while (tv->tv_pd->pd_blks_fetched == 0 && !tv->tv_pd->pd_exited)
|
||||
cv_wait(&tv->tv_pd->pd_cv, &tv->tv_pd->pd_mtx);
|
||||
tv->tv_pd->pd_blks_fetched--;
|
||||
cv_broadcast(&tv->tv_pd->pd_cv);
|
||||
mutex_exit(&tv->tv_pd->pd_mtx);
|
||||
}
|
||||
|
||||
if (td->td_flags & TRAVERSE_PRE) {
|
||||
err = td->td_func(td->td_spa, NULL, bp, pbuf, zb, dnp,
|
||||
td->td_arg);
|
||||
if (err)
|
||||
return (err);
|
||||
if (tv->tv_td->td_flags & TRAVERSE_PRE) {
|
||||
tv->tv_err = tv->tv_td->td_func(tv->tv_td->td_spa, NULL,
|
||||
tv->tv_bp, tv->tv_pbuf, tv->tv_zb, tv->tv_dnp,
|
||||
tv->tv_td->td_arg);
|
||||
if (tv->tv_err)
|
||||
return (tv->tv_err);
|
||||
}
|
||||
|
||||
if (BP_GET_LEVEL(bp) > 0) {
|
||||
uint32_t flags = ARC_WAIT;
|
||||
int i;
|
||||
blkptr_t *cbp;
|
||||
int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
|
||||
if (BP_GET_LEVEL(tv->tv_bp) > 0) {
|
||||
tv->tv_epb = BP_GET_LSIZE(tv->tv_bp) >> SPA_BLKPTRSHIFT;
|
||||
|
||||
err = dsl_read(NULL, td->td_spa, bp, pbuf,
|
||||
arc_getbuf_func, &buf,
|
||||
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
|
||||
if (err)
|
||||
return (err);
|
||||
tv->tv_err = dsl_read(NULL, tv->tv_td->td_spa, tv->tv_bp,
|
||||
tv->tv_pbuf, arc_getbuf_func, &tv->tv_buf,
|
||||
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
|
||||
&tv->tv_flags, tv->tv_zb);
|
||||
if (tv->tv_err)
|
||||
return (tv->tv_err);
|
||||
|
||||
/* recursively visitbp() blocks below this */
|
||||
cbp = buf->b_data;
|
||||
for (i = 0; i < epb; i++, cbp++) {
|
||||
SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
|
||||
zb->zb_level - 1,
|
||||
zb->zb_blkid * epb + i);
|
||||
err = traverse_visitbp(td, dnp, buf, cbp, &czb);
|
||||
if (err) {
|
||||
if (!hard)
|
||||
tv->tv_cbp = tv->tv_buf->b_data;
|
||||
for (tv->tv_i = 0; tv->tv_i < tv->tv_epb;
|
||||
tv->tv_i++, tv->tv_cbp++) {
|
||||
SET_BOOKMARK(&tv->tv_czb, tv->tv_zb->zb_objset,
|
||||
tv->tv_zb->zb_object, tv->tv_zb->zb_level - 1,
|
||||
tv->tv_zb->zb_blkid * tv->tv_epb + tv->tv_i);
|
||||
__traverse_visitbp_init(tv + 1, tv->tv_td,
|
||||
tv->tv_dnp, tv->tv_buf, tv->tv_cbp,
|
||||
&tv->tv_czb, tv->tv_depth + 1);
|
||||
tv->tv_err = __traverse_visitbp(tv + 1);
|
||||
if (tv->tv_err) {
|
||||
if (!tv->tv_hard)
|
||||
break;
|
||||
lasterr = err;
|
||||
tv->tv_lasterr = tv->tv_err;
|
||||
}
|
||||
}
|
||||
} else if (BP_GET_TYPE(bp) == DMU_OT_DNODE) {
|
||||
uint32_t flags = ARC_WAIT;
|
||||
int i;
|
||||
int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT;
|
||||
} else if (BP_GET_TYPE(tv->tv_bp) == DMU_OT_DNODE) {
|
||||
tv->tv_epb = BP_GET_LSIZE(tv->tv_bp) >> DNODE_SHIFT;
|
||||
|
||||
err = dsl_read(NULL, td->td_spa, bp, pbuf,
|
||||
arc_getbuf_func, &buf,
|
||||
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
|
||||
if (err)
|
||||
return (err);
|
||||
tv->tv_err = dsl_read(NULL, tv->tv_td->td_spa, tv->tv_bp,
|
||||
tv->tv_pbuf, arc_getbuf_func, &tv->tv_buf,
|
||||
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
|
||||
&tv->tv_flags, tv->tv_zb);
|
||||
if (tv->tv_err)
|
||||
return (tv->tv_err);
|
||||
|
||||
/* recursively visitbp() blocks below this */
|
||||
dnp = buf->b_data;
|
||||
for (i = 0; i < epb; i++, dnp++) {
|
||||
err = traverse_dnode(td, dnp, buf, zb->zb_objset,
|
||||
zb->zb_blkid * epb + i);
|
||||
if (err) {
|
||||
if (!hard)
|
||||
tv->tv_dnp = tv->tv_buf->b_data;
|
||||
for (tv->tv_i = 0; tv->tv_i < tv->tv_epb;
|
||||
tv->tv_i++, tv->tv_dnp++) {
|
||||
tv->tv_err = traverse_dnode(tv->tv_td, tv->tv_dnp,
|
||||
tv->tv_buf, tv->tv_zb->zb_objset,
|
||||
tv->tv_zb->zb_blkid * tv->tv_epb + tv->tv_i);
|
||||
if (tv->tv_err) {
|
||||
if (!tv->tv_hard)
|
||||
break;
|
||||
lasterr = err;
|
||||
tv->tv_lasterr = tv->tv_err;
|
||||
}
|
||||
}
|
||||
} else if (BP_GET_TYPE(bp) == DMU_OT_OBJSET) {
|
||||
uint32_t flags = ARC_WAIT;
|
||||
objset_phys_t *osp;
|
||||
dnode_phys_t *dnp;
|
||||
} else if (BP_GET_TYPE(tv->tv_bp) == DMU_OT_OBJSET) {
|
||||
|
||||
err = dsl_read_nolock(NULL, td->td_spa, bp,
|
||||
arc_getbuf_func, &buf,
|
||||
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
|
||||
if (err)
|
||||
return (err);
|
||||
tv->tv_err = dsl_read_nolock(NULL, tv->tv_td->td_spa,
|
||||
tv->tv_bp, arc_getbuf_func, &tv->tv_buf,
|
||||
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL,
|
||||
&tv->tv_flags, tv->tv_zb);
|
||||
if (tv->tv_err)
|
||||
return (tv->tv_err);
|
||||
|
||||
osp = buf->b_data;
|
||||
traverse_zil(td, &osp->os_zil_header);
|
||||
tv->tv_osp = tv->tv_buf->b_data;
|
||||
traverse_zil(tv->tv_td, &tv->tv_osp->os_zil_header);
|
||||
|
||||
dnp = &osp->os_meta_dnode;
|
||||
err = traverse_dnode(td, dnp, buf, zb->zb_objset,
|
||||
DMU_META_DNODE_OBJECT);
|
||||
if (err && hard) {
|
||||
lasterr = err;
|
||||
err = 0;
|
||||
tv->tv_ldnp = &tv->tv_osp->os_meta_dnode;
|
||||
tv->tv_err = traverse_dnode(tv->tv_td, tv->tv_ldnp, tv->tv_buf,
|
||||
tv->tv_zb->zb_objset, DMU_META_DNODE_OBJECT);
|
||||
if (tv->tv_err && tv->tv_hard) {
|
||||
tv->tv_lasterr = tv->tv_err;
|
||||
tv->tv_err = 0;
|
||||
}
|
||||
if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) {
|
||||
dnp = &osp->os_userused_dnode;
|
||||
err = traverse_dnode(td, dnp, buf, zb->zb_objset,
|
||||
if (tv->tv_err == 0 &&
|
||||
arc_buf_size(tv->tv_buf) >= sizeof (objset_phys_t)) {
|
||||
tv->tv_ldnp = &tv->tv_osp->os_userused_dnode;
|
||||
tv->tv_err = traverse_dnode(tv->tv_td, tv->tv_ldnp,
|
||||
tv->tv_buf, tv->tv_zb->zb_objset,
|
||||
DMU_USERUSED_OBJECT);
|
||||
}
|
||||
if (err && hard) {
|
||||
lasterr = err;
|
||||
err = 0;
|
||||
if (tv->tv_err && tv->tv_hard) {
|
||||
tv->tv_lasterr = tv->tv_err;
|
||||
tv->tv_err = 0;
|
||||
}
|
||||
if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) {
|
||||
dnp = &osp->os_groupused_dnode;
|
||||
err = traverse_dnode(td, dnp, buf, zb->zb_objset,
|
||||
if (tv->tv_err == 0 &&
|
||||
arc_buf_size(tv->tv_buf) >= sizeof (objset_phys_t)) {
|
||||
tv->tv_ldnp = &tv->tv_osp->os_groupused_dnode;
|
||||
tv->tv_err = traverse_dnode(tv->tv_td, tv->tv_ldnp,
|
||||
tv->tv_buf, tv->tv_zb->zb_objset,
|
||||
DMU_GROUPUSED_OBJECT);
|
||||
}
|
||||
}
|
||||
|
||||
if (buf)
|
||||
(void) arc_buf_remove_ref(buf, &buf);
|
||||
if (tv->tv_buf)
|
||||
(void) arc_buf_remove_ref(tv->tv_buf, &tv->tv_buf);
|
||||
|
||||
if (err == 0 && lasterr == 0 && (td->td_flags & TRAVERSE_POST)) {
|
||||
err = td->td_func(td->td_spa, NULL, bp, pbuf, zb, dnp,
|
||||
td->td_arg);
|
||||
if (tv->tv_err == 0 && tv->tv_lasterr == 0 &&
|
||||
(tv->tv_td->td_flags & TRAVERSE_POST)) {
|
||||
tv->tv_err = tv->tv_td->td_func(tv->tv_td->td_spa, NULL,
|
||||
tv->tv_bp, tv->tv_pbuf, tv->tv_zb, tv->tv_dnp,
|
||||
tv->tv_td->td_arg);
|
||||
}
|
||||
|
||||
return (err != 0 ? err : lasterr);
|
||||
return (tv->tv_err != 0 ? tv->tv_err : tv->tv_lasterr);
|
||||
}
|
||||
|
||||
/*
|
||||
* Due to limited stack space recursive functions are frowned upon in
|
||||
* the Linux kernel. However, they often are the most elegant solution
|
||||
* to a problem. The following code preserves the recursive function
|
||||
* traverse_visitbp() but moves the local variables AND function
|
||||
* arguments to the heap to minimize the stack frame size. Enough
|
||||
* space is initially allocated on the stack for 16 levels of recursion.
|
||||
* This change does ugly-up-the-code but it reduces the worst case
|
||||
* usage from roughly 2496 bytes to 576 bytes on x86_64 archs.
|
||||
*/
|
||||
static int
|
||||
traverse_visitbp(struct traverse_data *td, const dnode_phys_t *dnp,
|
||||
arc_buf_t *pbuf, blkptr_t *bp, const zbookmark_t *zb)
|
||||
{
|
||||
struct traverse_visitbp_data *tv;
|
||||
int error;
|
||||
|
||||
tv = kmem_zalloc(sizeof(struct traverse_visitbp_data) *
|
||||
TRAVERSE_VISITBP_MAX_DEPTH, KM_SLEEP);
|
||||
__traverse_visitbp_init(tv, td, dnp, pbuf, bp, zb, 0);
|
||||
|
||||
error = __traverse_visitbp(tv);
|
||||
|
||||
kmem_free(tv, sizeof(struct traverse_visitbp_data) *
|
||||
TRAVERSE_VISITBP_MAX_DEPTH);
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
||||
static int
|
||||
|
|
|
|||
Loading…
Reference in New Issue