/**
* Prepare partially written-to page for a write.
*/
static int ll_prepare_partial_page(const struct lu_env *env, struct cl_io *io,
struct cl_page *pg)
{
struct cl_attr *attr = vvp_env_thread_attr(env);
struct cl_object *obj = io->ci_obj;
struct vvp_page *vpg = cl_object_page_slice(obj, pg);
loff_t offset = cl_offset(obj, vvp_index(vpg));
int result;
cl_object_attr_lock(obj);
result = cl_object_attr_get(env, obj, attr);
cl_object_attr_unlock(obj);
if (result == 0) {
/*
* If are writing to a new page, no need to read old data.
* The extent locking will have updated the KMS, and for our
* purposes here we can treat it like i_size.
*/
if (attr->cat_kms <= offset) {
char *kaddr = ll_kmap_atomic(vpg->vpg_page, KM_USER0);
memset(kaddr, 0, cl_page_size(obj));
ll_kunmap_atomic(kaddr, KM_USER0);
} else if (vpg->vpg_defer_uptodate)
vpg->vpg_ra_used = 1;
else
result = ll_page_sync_io(env, io, pg, CRT_READ);
}
return result;
}
static void osc_page_touch_at(const struct lu_env *env,
struct cl_object *obj, pgoff_t idx, unsigned to)
{
struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
int valid;
__u64 kms;
/* offset within stripe */
kms = cl_offset(obj, idx) + to;
cl_object_attr_lock(obj);
/*
* XXX old code used
*
* ll_inode_size_lock(inode, 0); lov_stripe_lock(lsm);
*
* here
*/
CDEBUG(D_INODE, "stripe KMS %sincreasing %llu->%llu %llu\n",
kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms,
loi->loi_lvb.lvb_size);
valid = 0;
if (kms > loi->loi_kms) {
attr->cat_kms = kms;
valid |= CAT_KMS;
}
if (kms > loi->loi_lvb.lvb_size) {
attr->cat_size = kms;
valid |= CAT_SIZE;
}
cl_object_attr_set(env, obj, attr, valid);
cl_object_attr_unlock(obj);
}
static void vvp_object_size_lock(struct cl_object *obj)
{
struct inode *inode = vvp_object_inode(obj);
ll_inode_size_lock(inode);
cl_object_attr_lock(obj);
}
/**
* Updates object attributes from a lock value block (lvb) received together
* with the DLM lock reply from the server. Copy of osc_update_enqueue()
* logic.
*
* This can be optimized to not update attributes when lock is a result of a
* local match.
*
* Called under lock and resource spin-locks.
*/
static void osc_lock_lvb_update(const struct lu_env *env, struct osc_lock *olck,
int rc)
{
struct ost_lvb *lvb;
struct cl_object *obj;
struct lov_oinfo *oinfo;
struct cl_attr *attr;
unsigned valid;
if (!(olck->ols_flags & LDLM_FL_LVB_READY))
return;
lvb = &olck->ols_lvb;
obj = olck->ols_cl.cls_obj;
oinfo = cl2osc(obj)->oo_oinfo;
attr = &osc_env_info(env)->oti_attr;
valid = CAT_BLOCKS | CAT_ATIME | CAT_CTIME | CAT_MTIME | CAT_SIZE;
cl_lvb2attr(attr, lvb);
cl_object_attr_lock(obj);
if (rc == 0) {
struct ldlm_lock *dlmlock;
__u64 size;
dlmlock = olck->ols_lock;
LASSERT(dlmlock != NULL);
/* re-grab LVB from a dlm lock under DLM spin-locks. */
*lvb = *(struct ost_lvb *)dlmlock->l_lvb_data;
size = lvb->lvb_size;
/* Extend KMS up to the end of this lock and no further
* A lock on [x,y] means a KMS of up to y + 1 bytes! */
if (size > dlmlock->l_policy_data.l_extent.end)
size = dlmlock->l_policy_data.l_extent.end + 1;
if (size >= oinfo->loi_kms) {
LDLM_DEBUG(dlmlock, "lock acquired, setting rss="LPU64
", kms="LPU64, lvb->lvb_size, size);
valid |= CAT_KMS;
attr->cat_kms = size;
} else {
LDLM_DEBUG(dlmlock, "lock acquired, setting rss="
LPU64"; leaving kms="LPU64", end="LPU64,
lvb->lvb_size, oinfo->loi_kms,
dlmlock->l_policy_data.l_extent.end);
}
ldlm_lock_allow_match_locked(dlmlock);
} else if (rc == -ENAVAIL && olck->ols_glimpse) {
CDEBUG(D_INODE, "glimpsed, setting rss="LPU64"; leaving"
" kms="LPU64"\n", lvb->lvb_size, oinfo->loi_kms);
} else
valid = 0;
if (valid != 0)
cl_object_attr_set(env, obj, attr, valid);
cl_object_attr_unlock(obj);
}
/**
* Helper for osc_dlm_blocking_ast() handling discrepancies between cl_lock
* and ldlm_lock caches.
*/
static int mdc_dlm_blocking_ast0(const struct lu_env *env,
struct ldlm_lock *dlmlock,
void *data, int flag)
{
struct cl_object *obj = NULL;
int result = 0;
bool discard;
enum cl_lock_mode mode = CLM_READ;
ENTRY;
LASSERT(flag == LDLM_CB_CANCELING);
LASSERT(dlmlock != NULL);
lock_res_and_lock(dlmlock);
if (dlmlock->l_granted_mode != dlmlock->l_req_mode) {
dlmlock->l_ast_data = NULL;
unlock_res_and_lock(dlmlock);
RETURN(0);
}
discard = ldlm_is_discard_data(dlmlock);
if (dlmlock->l_granted_mode & (LCK_PW | LCK_GROUP))
mode = CLM_WRITE;
if (dlmlock->l_ast_data != NULL) {
obj = osc2cl(dlmlock->l_ast_data);
dlmlock->l_ast_data = NULL;
cl_object_get(obj);
}
ldlm_set_kms_ignore(dlmlock);
unlock_res_and_lock(dlmlock);
/* if l_ast_data is NULL, the dlmlock was enqueued by AGL or
* the object has been destroyed. */
if (obj != NULL) {
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
/* Destroy pages covered by the extent of the DLM lock */
result = mdc_lock_flush(env, cl2osc(obj), cl_index(obj, 0),
CL_PAGE_EOF, mode, discard);
/* Losing a lock, set KMS to 0.
* NB: assumed that DOM lock covers whole data on MDT.
*/
/* losing a lock, update kms */
lock_res_and_lock(dlmlock);
cl_object_attr_lock(obj);
attr->cat_kms = 0;
cl_object_attr_update(env, obj, attr, CAT_KMS);
cl_object_attr_unlock(obj);
unlock_res_and_lock(dlmlock);
cl_object_put(env, obj);
}
RETURN(result);
}
/**
* Updates object attributes from a lock value block (lvb) received together
* with the DLM lock reply from the server. Copy of osc_update_enqueue()
* logic.
*
* This can be optimized to not update attributes when lock is a result of a
* local match.
*
* Called under lock and resource spin-locks.
*/
static void osc_lock_lvb_update(const struct lu_env *env,
struct osc_object *osc,
struct ldlm_lock *dlmlock,
struct ost_lvb *lvb)
{
struct cl_object *obj = osc2cl(osc);
struct lov_oinfo *oinfo = osc->oo_oinfo;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
unsigned valid;
ENTRY;
valid = CAT_BLOCKS | CAT_ATIME | CAT_CTIME | CAT_MTIME | CAT_SIZE;
if (lvb == NULL) {
LASSERT(dlmlock != NULL);
lvb = dlmlock->l_lvb_data;
}
cl_lvb2attr(attr, lvb);
cl_object_attr_lock(obj);
if (dlmlock != NULL) {
__u64 size;
check_res_locked(dlmlock->l_resource);
LASSERT(lvb == dlmlock->l_lvb_data);
size = lvb->lvb_size;
/* Extend KMS up to the end of this lock and no further
* A lock on [x,y] means a KMS of up to y + 1 bytes! */
if (size > dlmlock->l_policy_data.l_extent.end)
size = dlmlock->l_policy_data.l_extent.end + 1;
if (size >= oinfo->loi_kms) {
LDLM_DEBUG(dlmlock, "lock acquired, setting rss=%llu"
", kms=%llu", lvb->lvb_size, size);
valid |= CAT_KMS;
attr->cat_kms = size;
} else {
LDLM_DEBUG(dlmlock, "lock acquired, setting rss="
"%llu; leaving kms=%llu, end=%llu",
lvb->lvb_size, oinfo->loi_kms,
dlmlock->l_policy_data.l_extent.end);
}
ldlm_lock_allow_match_locked(dlmlock);
}
cl_object_attr_update(env, obj, attr, valid);
cl_object_attr_unlock(obj);
EXIT;
}
static int osc_io_write_start(const struct lu_env *env,
const struct cl_io_slice *slice)
{
struct cl_object *obj = slice->cis_obj;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
int rc = 0;
OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_SETTIME, 1);
cl_object_attr_lock(obj);
attr->cat_mtime = attr->cat_ctime = LTIME_S(CURRENT_TIME);
rc = cl_object_attr_set(env, obj, attr, CAT_MTIME | CAT_CTIME);
cl_object_attr_unlock(obj);
return rc;
}
static int osc_io_read_start(const struct lu_env *env,
const struct cl_io_slice *slice)
{
struct cl_object *obj = slice->cis_obj;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
int rc = 0;
if (!slice->cis_io->ci_noatime) {
cl_object_attr_lock(obj);
attr->cat_atime = LTIME_S(CURRENT_TIME);
rc = cl_object_attr_set(env, obj, attr, CAT_ATIME);
cl_object_attr_unlock(obj);
}
return rc;
}
static int osc_io_read_start(const struct lu_env *env,
const struct cl_io_slice *slice)
{
struct osc_io *oio = cl2osc_io(env, slice);
struct cl_object *obj = slice->cis_obj;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
int rc = 0;
ENTRY;
if (oio->oi_lockless == 0 && !slice->cis_io->ci_noatime) {
cl_object_attr_lock(obj);
attr->cat_atime = LTIME_S(CFS_CURRENT_TIME);
rc = cl_object_attr_set(env, obj, attr, CAT_ATIME);
cl_object_attr_unlock(obj);
}
RETURN(rc);
}
/**
* Breaks a link between osc_lock and dlm_lock.
*/
static void osc_lock_detach(const struct lu_env *env, struct osc_lock *olck)
{
struct ldlm_lock *dlmlock;
spin_lock(&osc_ast_guard);
dlmlock = olck->ols_lock;
if (dlmlock == NULL) {
spin_unlock(&osc_ast_guard);
return;
}
olck->ols_lock = NULL;
/* wb(); --- for all who checks (ols->ols_lock != NULL) before
* call to osc_lock_detach() */
dlmlock->l_ast_data = NULL;
olck->ols_handle.cookie = 0ULL;
spin_unlock(&osc_ast_guard);
lock_res_and_lock(dlmlock);
if (dlmlock->l_granted_mode == dlmlock->l_req_mode) {
struct cl_object *obj = olck->ols_cl.cls_obj;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
__u64 old_kms;
cl_object_attr_lock(obj);
/* Must get the value under the lock to avoid possible races. */
old_kms = cl2osc(obj)->oo_oinfo->loi_kms;
/* Update the kms. Need to loop all granted locks.
* Not a problem for the client */
attr->cat_kms = ldlm_extent_shift_kms(dlmlock, old_kms);
cl_object_attr_set(env, obj, attr, CAT_KMS);
cl_object_attr_unlock(obj);
}
unlock_res_and_lock(dlmlock);
/* release a reference taken in osc_lock_upcall0(). */
LASSERT(olck->ols_has_ref);
lu_ref_del(&dlmlock->l_reference, "osc_lock", olck);
LDLM_LOCK_RELEASE(dlmlock);
olck->ols_has_ref = 0;
}
/**
* Prepare partially written-to page for a write.
*/
static int vvp_io_prepare_partial(const struct lu_env *env, struct cl_io *io,
struct cl_object *obj, struct cl_page *pg,
struct ccc_page *cp,
unsigned from, unsigned to)
{
struct cl_attr *attr = ccc_env_thread_attr(env);
loff_t offset = cl_offset(obj, pg->cp_index);
int result;
cl_object_attr_lock(obj);
result = cl_object_attr_get(env, obj, attr);
cl_object_attr_unlock(obj);
if (result == 0) {
/*
* If are writing to a new page, no need to read old data.
* The extent locking will have updated the KMS, and for our
* purposes here we can treat it like i_size.
*/
if (attr->cat_kms <= offset) {
char *kaddr = ll_kmap_atomic(cp->cpg_page, KM_USER0);
memset(kaddr, 0, cl_page_size(obj));
ll_kunmap_atomic(kaddr, KM_USER0);
} else if (cp->cpg_defer_uptodate)
cp->cpg_ra_used = 1;
else
result = vvp_page_sync_io(env, io, pg, cp, CRT_READ);
/*
* In older implementations, obdo_refresh_inode is called here
* to update the inode because the write might modify the
* object info at OST. However, this has been proven useless,
* since LVB functions will be called when user space program
* tries to retrieve inode attribute. Also, see bug 15909 for
* details. -jay
*/
if (result == 0)
cl_page_export(env, pg, 1);
}
return result;
}
static int osc_io_write_start(const struct lu_env *env,
const struct cl_io_slice *slice)
{
struct osc_io *oio = cl2osc_io(env, slice);
struct cl_object *obj = slice->cis_obj;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
int result = 0;
ENTRY;
if (oio->oi_lockless == 0) {
OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_SETTIME, 1);
cl_object_attr_lock(obj);
result = cl_object_attr_get(env, obj, attr);
if (result == 0) {
attr->cat_mtime = attr->cat_ctime =
LTIME_S(CFS_CURRENT_TIME);
result = cl_object_attr_set(env, obj, attr,
CAT_MTIME | CAT_CTIME);
}
cl_object_attr_unlock(obj);
}
RETURN(result);
}
static int vvp_io_setattr_time(const struct lu_env *env,
const struct cl_io_slice *ios)
{
struct cl_io *io = ios->cis_io;
struct cl_object *obj = io->ci_obj;
struct cl_attr *attr = ccc_env_thread_attr(env);
int result;
unsigned valid = CAT_CTIME;
cl_object_attr_lock(obj);
attr->cat_ctime = io->u.ci_setattr.sa_attr.lvb_ctime;
if (io->u.ci_setattr.sa_valid & ATTR_ATIME_SET) {
attr->cat_atime = io->u.ci_setattr.sa_attr.lvb_atime;
valid |= CAT_ATIME;
}
if (io->u.ci_setattr.sa_valid & ATTR_MTIME_SET) {
attr->cat_mtime = io->u.ci_setattr.sa_attr.lvb_mtime;
valid |= CAT_MTIME;
}
result = cl_object_attr_set(env, obj, attr, valid);
cl_object_attr_unlock(obj);
return result;
}
/**
* This is called when a page is accessed within file in a way that creates
* new page, if one were missing (i.e., if there were a hole at that place in
* the file, or accessed page is beyond the current file size).
*
* Expand stripe KMS if necessary.
*/
static void osc_page_touch_at(const struct lu_env *env,
struct cl_object *obj, pgoff_t idx, size_t to)
{
struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
int valid;
__u64 kms;
/* offset within stripe */
kms = cl_offset(obj, idx) + to;
cl_object_attr_lock(obj);
/*
* XXX old code used
*
* ll_inode_size_lock(inode, 0); lov_stripe_lock(lsm);
*
* here
*/
CDEBUG(D_INODE, "stripe KMS %sincreasing "LPU64"->"LPU64" "LPU64"\n",
kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms,
loi->loi_lvb.lvb_size);
attr->cat_mtime = attr->cat_ctime = LTIME_S(CFS_CURRENT_TIME);
valid = CAT_MTIME | CAT_CTIME;
if (kms > loi->loi_kms) {
attr->cat_kms = kms;
valid |= CAT_KMS;
}
if (kms > loi->loi_lvb.lvb_size) {
attr->cat_size = kms;
valid |= CAT_SIZE;
}
cl_object_attr_update(env, obj, attr, valid);
cl_object_attr_unlock(obj);
}
static int osc_io_setattr_start(const struct lu_env *env,
const struct cl_io_slice *slice)
{
struct cl_io *io = slice->cis_io;
struct osc_io *oio = cl2osc_io(env, slice);
struct cl_object *obj = slice->cis_obj;
struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
struct obdo *oa = &oio->oi_oa;
struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
__u64 size = io->u.ci_setattr.sa_attr.lvb_size;
unsigned int ia_valid = io->u.ci_setattr.sa_valid;
int result = 0;
struct obd_info oinfo = { { { 0 } } };
/* truncate cache dirty pages first */
if (cl_io_is_trunc(io))
result = osc_cache_truncate_start(env, oio, cl2osc(obj), size);
if (result == 0 && oio->oi_lockless == 0) {
cl_object_attr_lock(obj);
result = cl_object_attr_get(env, obj, attr);
if (result == 0) {
struct ost_lvb *lvb = &io->u.ci_setattr.sa_attr;
unsigned int cl_valid = 0;
if (ia_valid & ATTR_SIZE) {
attr->cat_size = attr->cat_kms = size;
cl_valid = (CAT_SIZE | CAT_KMS);
}
if (ia_valid & ATTR_MTIME_SET) {
attr->cat_mtime = lvb->lvb_mtime;
cl_valid |= CAT_MTIME;
}
if (ia_valid & ATTR_ATIME_SET) {
attr->cat_atime = lvb->lvb_atime;
cl_valid |= CAT_ATIME;
}
if (ia_valid & ATTR_CTIME_SET) {
attr->cat_ctime = lvb->lvb_ctime;
cl_valid |= CAT_CTIME;
}
result = cl_object_attr_set(env, obj, attr, cl_valid);
}
cl_object_attr_unlock(obj);
}
memset(oa, 0, sizeof(*oa));
if (result == 0) {
oa->o_oi = loi->loi_oi;
oa->o_mtime = attr->cat_mtime;
oa->o_atime = attr->cat_atime;
oa->o_ctime = attr->cat_ctime;
oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLATIME |
OBD_MD_FLCTIME | OBD_MD_FLMTIME;
if (ia_valid & ATTR_SIZE) {
oa->o_size = size;
oa->o_blocks = OBD_OBJECT_EOF;
oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
if (oio->oi_lockless) {
oa->o_flags = OBD_FL_SRVLOCK;
oa->o_valid |= OBD_MD_FLFLAGS;
}
} else {
LASSERT(oio->oi_lockless == 0);
}
oinfo.oi_oa = oa;
oinfo.oi_capa = io->u.ci_setattr.sa_capa;
init_completion(&cbargs->opc_sync);
if (ia_valid & ATTR_SIZE)
result = osc_punch_base(osc_export(cl2osc(obj)),
&oinfo, osc_async_upcall,
cbargs, PTLRPCD_SET);
else
result = osc_setattr_async_base(osc_export(cl2osc(obj)),
&oinfo, NULL,
osc_async_upcall,
cbargs, PTLRPCD_SET);
cbargs->opc_rpc_sent = result == 0;
}
return result;
}
/**
* Helper for osc_dlm_blocking_ast() handling discrepancies between cl_lock
* and ldlm_lock caches.
*/
static int osc_dlm_blocking_ast0(const struct lu_env *env,
struct ldlm_lock *dlmlock,
void *data, int flag)
{
struct cl_object *obj = NULL;
int result = 0;
int discard;
enum cl_lock_mode mode = CLM_READ;
LASSERT(flag == LDLM_CB_CANCELING);
lock_res_and_lock(dlmlock);
if (dlmlock->l_granted_mode != dlmlock->l_req_mode) {
dlmlock->l_ast_data = NULL;
unlock_res_and_lock(dlmlock);
return 0;
}
discard = ldlm_is_discard_data(dlmlock);
if (dlmlock->l_granted_mode & (LCK_PW | LCK_GROUP))
mode = CLM_WRITE;
if (dlmlock->l_ast_data) {
obj = osc2cl(dlmlock->l_ast_data);
dlmlock->l_ast_data = NULL;
cl_object_get(obj);
}
unlock_res_and_lock(dlmlock);
/* if l_ast_data is NULL, the dlmlock was enqueued by AGL or
* the object has been destroyed.
*/
if (obj) {
struct ldlm_extent *extent = &dlmlock->l_policy_data.l_extent;
struct cl_attr *attr = &osc_env_info(env)->oti_attr;
__u64 old_kms;
/* Destroy pages covered by the extent of the DLM lock */
result = osc_lock_flush(cl2osc(obj),
cl_index(obj, extent->start),
cl_index(obj, extent->end),
mode, discard);
/* losing a lock, update kms */
lock_res_and_lock(dlmlock);
cl_object_attr_lock(obj);
/* Must get the value under the lock to avoid race. */
old_kms = cl2osc(obj)->oo_oinfo->loi_kms;
/* Update the kms. Need to loop all granted locks.
* Not a problem for the client
*/
attr->cat_kms = ldlm_extent_shift_kms(dlmlock, old_kms);
cl_object_attr_set(env, obj, attr, CAT_KMS);
cl_object_attr_unlock(obj);
unlock_res_and_lock(dlmlock);
cl_object_put(env, obj);
}
return result;
}
