#include "cmm_internal.h"
#include "mdc_internal.h"
-#define CMM_NO_SPLIT_EXPECTED 0
-#define CMM_EXPECT_SPLIT 1
-#define CMM_NO_SPLITTABLE 2
+static struct lu_buf *cmm_buf_get(const struct lu_env *env, void *area,
+ ssize_t len)
+{
+ struct lu_buf *buf;
-enum {
- SPLIT_SIZE = 64*1024
-};
+ buf = &cmm_env_info(env)->cmi_buf;
+ buf->lb_buf = area;
+ buf->lb_len = len;
+ return buf;
+}
-static inline struct lu_fid* cmm2_fid(struct cmm_object *obj)
+int cmm_mdsnum_check(const struct lu_env *env, struct md_object *mp,
+ const char *name)
{
- return &(obj->cmo_obj.mo_lu.lo_header->loh_fid);
+ struct md_attr *ma = &cmm_env_info(env)->cmi_ma;
+ int rc;
+ ENTRY;
+
+ /* Try to get the LMV EA size */
+ memset(ma, 0, sizeof(*ma));
+ ma->ma_need = MA_INODE | MA_LMV;
+ rc = mo_attr_get(env, mp, ma);
+ if (rc)
+ RETURN(rc);
+
+ if (ma->ma_valid & MA_LMV) {
+ int stripe;
+
+ OBD_ALLOC(ma->ma_lmv, ma->ma_lmv_size);
+ if (ma->ma_lmv == NULL)
+ RETURN(-ENOMEM);
+
+ /* Get LMV EA */
+ ma->ma_need = MA_INODE | MA_LMV;
+ rc = mo_attr_get(env, mp, ma);
+ if (rc)
+ RETURN(rc);
+
+ /* Skip checking the slave dirs (mea_count == 0) */
+ if (ma->ma_lmv->mea_count == 0)
+ RETURN(0);
+ /*
+ * Get stripe by name to check the name belongs to master dir,
+ * otherwise return the -ERESTART
+ */
+ stripe = mea_name2idx(ma->ma_lmv, name, strlen(name));
+
+ /* Master stripe is always 0 */
+ if (stripe != 0)
+ rc = -ERESTART;
+
+ OBD_FREE(ma->ma_lmv, ma->ma_lmv_size);
+ }
+ RETURN(rc);
}
-static int cmm_expect_splitting(const struct lu_env *env,
- struct md_object *mo,
- struct md_attr *ma)
+int cmm_expect_splitting(const struct lu_env *env, struct md_object *mo,
+ struct md_attr *ma)
{
struct cmm_device *cmm = cmm_obj2dev(md2cmm_obj(mo));
struct lu_fid *fid = NULL;
int rc = CMM_EXPECT_SPLIT;
ENTRY;
+ ma->ma_need = MA_INODE | MA_LMV;
+ rc = mo_attr_get(env, mo, ma);
+ if (rc)
+ GOTO(cleanup, rc = CMM_NOT_SPLITTABLE);
+
if (cmm->cmm_tgt_count == 0)
GOTO(cleanup, rc = CMM_NO_SPLIT_EXPECTED);
- if (ma->ma_attr.la_size < SPLIT_SIZE)
+ if (ma->ma_attr.la_size < CMM_SPLIT_SIZE)
GOTO(cleanup, rc = CMM_NO_SPLIT_EXPECTED);
if (ma->ma_lmv_size)
GOTO(cleanup, rc = CMM_NO_SPLIT_EXPECTED);
+
OBD_ALLOC_PTR(fid);
rc = cmm_child_ops(cmm)->mdo_root_get(env, cmm->cmm_child, fid);
if (rc)
rc = CMM_EXPECT_SPLIT;
- if (lu_fid_eq(fid, cmm2_fid(md2cmm_obj(mo))))
+ if (lu_fid_eq(fid, cmm2fid(md2cmm_obj(mo))))
GOTO(cleanup, rc = CMM_NO_SPLIT_EXPECTED);
+ EXIT;
cleanup:
if (fid)
OBD_FREE_PTR(fid);
- RETURN(rc);
+ return rc;
}
-#define cmm_md_size(stripes) \
+#define cmm_md_size(stripes) \
(sizeof(struct lmv_stripe_md) + (stripes) * sizeof(struct lu_fid))
-static int cmm_alloc_fid(const struct lu_env *env, struct cmm_device *cmm,
- struct lu_fid *fid, int count)
-{
- struct mdc_device *mc, *tmp;
- int rc = 0, i = 0;
-
- LASSERT(count == cmm->cmm_tgt_count);
- /* FIXME: this spin_lock maybe not proper,
- * because fid_alloc may need RPC */
- spin_lock(&cmm->cmm_tgt_guard);
- list_for_each_entry_safe(mc, tmp, &cmm->cmm_targets,
- mc_linkage) {
- LASSERT(cmm->cmm_local_num != mc->mc_num);
-
- rc = obd_fid_alloc(mc->mc_desc.cl_exp, &fid[i], NULL);
- if (rc > 0) {
- struct lu_site *ls;
-
- ls = cmm->cmm_md_dev.md_lu_dev.ld_site;
- rc = fld_client_create(ls->ls_client_fld,
- fid_seq(&fid[i]),
- mc->mc_num, env);
- }
- if (rc < 0) {
- spin_unlock(&cmm->cmm_tgt_guard);
- RETURN(rc);
- }
- i++;
- }
- spin_unlock(&cmm->cmm_tgt_guard);
- LASSERT(i == count);
- if (rc == 1)
- rc = 0;
- RETURN(rc);
-}
-
struct cmm_object *cmm_object_find(const struct lu_env *env,
struct cmm_device *d,
- const struct lu_fid *f,
- struct lustre_capa *capa)
+ const struct lu_fid *f)
{
struct lu_object *o;
struct cmm_object *m;
ENTRY;
- o = lu_object_find(env, d->cmm_md_dev.md_lu_dev.ld_site, f,
- capa);
+ o = lu_object_find(env, d->cmm_md_dev.md_lu_dev.ld_site, f);
if (IS_ERR(o))
m = (struct cmm_object *)o;
else
lu_object_put(env, &o->cmo_obj.mo_lu);
}
-static int cmm_creat_remote_obj(const struct lu_env *env,
- struct cmm_device *cmm,
- struct lu_fid *fid, struct md_attr *ma,
- const struct lmv_stripe_md *lmv,
- int lmv_size)
+static int cmm_object_create(const struct lu_env *env,
+ struct cmm_device *cmm,
+ struct lu_fid *fid,
+ struct md_attr *ma,
+ struct lmv_stripe_md *lmv,
+ int lmv_size)
{
- struct cmm_object *obj;
struct md_create_spec *spec;
+ struct cmm_object *obj;
int rc;
ENTRY;
- /* XXX Since capablity will not work with split. so we
- * pass NULL capablity here */
- obj = cmm_object_find(env, cmm, fid, NULL);
+ obj = cmm_object_find(env, cmm, fid);
if (IS_ERR(obj))
RETURN(PTR_ERR(obj));
RETURN(rc);
}
-static int cmm_create_slave_objects(const struct lu_env *env,
- struct md_object *mo, struct md_attr *ma)
+static int cmm_fid_alloc(const struct lu_env *env,
+ struct cmm_device *cmm,
+ struct mdc_device *mc,
+ struct lu_fid *fid)
+{
+ int rc;
+ ENTRY;
+
+ LASSERT(cmm != NULL);
+ LASSERT(mc != NULL);
+ LASSERT(fid != NULL);
+
+ down(&mc->mc_fid_sem);
+
+ /* Alloc new fid on @mc. */
+ rc = obd_fid_alloc(mc->mc_desc.cl_exp, fid, NULL);
+ if (rc > 0) {
+ /* Setup FLD for new sequenceif needed. */
+ rc = fld_client_create(cmm->cmm_fld, fid_seq(fid),
+ mc->mc_num, env);
+ if (rc)
+ CERROR("Can't create fld entry, rc %d\n", rc);
+ }
+ up(&mc->mc_fid_sem);
+
+ RETURN(rc);
+}
+
+static int cmm_slaves_create(const struct lu_env *env,
+ struct md_object *mo,
+ struct md_attr *ma)
{
struct cmm_device *cmm = cmm_obj2dev(md2cmm_obj(mo));
struct lmv_stripe_md *lmv = NULL, *slave_lmv = NULL;
- int lmv_size, i, rc;
- struct lu_fid *lf = cmm2_fid(md2cmm_obj(mo));
+ struct lu_fid *lf = cmm2fid(md2cmm_obj(mo));
+ struct mdc_device *mc, *tmp;
+ int lmv_size, i = 1, rc = 0;
ENTRY;
lmv_size = cmm_md_size(cmm->cmm_tgt_count + 1);
- /* This lmv will be free after finish splitting. */
+ /* This lmv will free after finish splitting. */
OBD_ALLOC(lmv, lmv_size);
if (!lmv)
RETURN(-ENOMEM);
lmv->mea_magic = MEA_MAGIC_HASH_SEGMENT;
lmv->mea_count = cmm->cmm_tgt_count + 1;
+ /* Store master FID to local node idx number. */
lmv->mea_ids[0] = *lf;
- rc = cmm_alloc_fid(env, cmm, &lmv->mea_ids[1],
- cmm->cmm_tgt_count);
- if (rc)
- GOTO(cleanup, rc);
-
OBD_ALLOC_PTR(slave_lmv);
if (!slave_lmv)
GOTO(cleanup, rc = -ENOMEM);
slave_lmv->mea_master = cmm->cmm_local_num;
slave_lmv->mea_magic = MEA_MAGIC_HASH_SEGMENT;
slave_lmv->mea_count = 0;
- for (i = 1; i < cmm->cmm_tgt_count + 1; i ++) {
- rc = cmm_creat_remote_obj(env, cmm, &lmv->mea_ids[i], ma,
- slave_lmv, sizeof(slave_lmv));
+
+ list_for_each_entry_safe(mc, tmp, &cmm->cmm_targets, mc_linkage) {
+ /* Alloc fid for slave object. */
+ rc = cmm_fid_alloc(env, cmm, mc, &lmv->mea_ids[i]);
+ if (rc) {
+ CERROR("Can't alloc fid for slave "LPU64", rc %d\n",
+ mc->mc_num, rc);
+ GOTO(cleanup, rc);
+ }
+
+ /* Create slave on remote MDT. */
+ rc = cmm_object_create(env, cmm, &lmv->mea_ids[i], ma,
+ slave_lmv, sizeof(*slave_lmv));
if (rc)
GOTO(cleanup, rc);
+ i++;
}
ma->ma_lmv_size = lmv_size;
ma->ma_lmv = lmv;
+ EXIT;
cleanup:
if (slave_lmv)
OBD_FREE_PTR(slave_lmv);
- RETURN(rc);
+ if (rc && lmv) {
+ OBD_FREE(lmv, lmv_size);
+ ma->ma_lmv = NULL;
+ ma->ma_lmv_size = 0;
+ }
+ return rc;
}
static int cmm_send_split_pages(const struct lu_env *env,
- struct md_object *mo, struct lu_rdpg *rdpg,
+ struct md_object *mo,
+ struct lu_rdpg *rdpg,
struct lu_fid *fid, int len)
{
struct cmm_device *cmm = cmm_obj2dev(md2cmm_obj(mo));
int rc = 0;
ENTRY;
- obj = cmm_object_find(env, cmm, fid, NULL);
+ obj = cmm_object_find(env, cmm, fid);
if (IS_ERR(obj))
RETURN(PTR_ERR(obj));
RETURN(rc);
}
+static int cmm_remove_dir_ent(const struct lu_env *env,
+ struct md_object *mo,
+ struct lu_dirent *ent)
+{
+ struct cmm_device *cmm = cmm_obj2dev(md2cmm_obj(mo));
+ struct cmm_object *obj;
+ char *name;
+ int is_dir, rc;
+ ENTRY;
+
+ if (!strncmp(ent->lde_name, ".", ent->lde_namelen) ||
+ !strncmp(ent->lde_name, "..", ent->lde_namelen))
+ RETURN(0);
+
+ obj = cmm_object_find(env, cmm, &ent->lde_fid);
+ if (IS_ERR(obj))
+ RETURN(PTR_ERR(obj));
+
+ if (lu_object_exists(&obj->cmo_obj.mo_lu) > 0)
+ is_dir = S_ISDIR(lu_object_attr(&obj->cmo_obj.mo_lu));
+ else
+ /* XXX: is this correct? */
+ is_dir = 1;
+
+ OBD_ALLOC(name, ent->lde_namelen + 1);
+ if (!name)
+ GOTO(cleanup, rc = -ENOMEM);
+
+ memcpy(name, ent->lde_name, ent->lde_namelen);
+ rc = mdo_name_remove(env, md_object_next(mo),
+ name, is_dir);
+ OBD_FREE(name, ent->lde_namelen + 1);
+ if (rc)
+ GOTO(cleanup, rc);
+
+ /*
+ * This ent will be transferred to slave MDS and insert it there, so in
+ * the slave MDS, we should know whether this object is dir or not, so
+ * use the highest bit of the hash to indicate that (because we do not
+ * use highest bit of hash).
+ */
+ if (is_dir)
+ ent->lde_hash |= MAX_HASH_HIGHEST_BIT;
+cleanup:
+ cmm_object_put(env, obj);
+
+ RETURN(rc);
+}
+
static int cmm_remove_entries(const struct lu_env *env,
struct md_object *mo, struct lu_rdpg *rdpg,
__u32 hash_end, __u32 *len)
kmap(rdpg->rp_pages[0]);
dp = page_address(rdpg->rp_pages[0]);
for (ent = lu_dirent_start(dp); ent != NULL;
- ent = lu_dirent_next(ent)) {
+ ent = lu_dirent_next(ent)) {
if (ent->lde_hash < hash_end) {
- if (strncmp(ent->lde_name, ".", ent->lde_namelen) &&
- strncmp(ent->lde_name, "..", ent->lde_namelen)) {
- char *name;
- /* FIXME: Here we allocate name for each name,
- * maybe stupid, but can not find better way.
- * will find better way */
- OBD_ALLOC(name, ent->lde_namelen + 1);
- memcpy(name, ent->lde_name, ent->lde_namelen);
- rc = mdo_name_remove(env, md_object_next(mo),
- name, 0);
- OBD_FREE(name, ent->lde_namelen + 1);
- }
+ rc = cmm_remove_dir_ent(env, mo, ent);
if (rc) {
- /* FIXME: Do not know why it return -ENOENT
- * in some case
- * */
- if (rc != -ENOENT)
- GOTO(unmap, rc);
+ CERROR("Can not del %s rc %d\n", ent->lde_name,
+ rc);
+ GOTO(unmap, rc);
}
} else {
if (ent != lu_dirent_start(dp))
}
}
*len = CFS_PAGE_SIZE;
+ EXIT;
unmap:
kunmap(rdpg->rp_pages[0]);
- RETURN(rc);
+ return rc;
}
static int cmm_split_entries(const struct lu_env *env,
ENTRY;
LASSERTF(rdpg->rp_npages == 1, "Now Only support split 1 page each time"
- "npages %d \n", rdpg->rp_npages);
- /* Read splitted page and send them to the slave master */
+ "npages %d\n", rdpg->rp_npages);
+
+ /* Read split page and send them to the slave master. */
do {
struct lu_dirpage *ldp;
__u32 len = 0;
kunmap(rdpg->rp_pages[0]);
rc = mo_readpage(env, md_object_next(mo), rdpg);
- /* -E2BIG means it already reach the end of the dir */
- if (rc) {
- if (rc != -ERANGE) {
- if (rc == -E2BIG)
- rc = 0;
- RETURN(rc);
- }
- }
+ if (rc)
+ RETURN(rc);
/* Remove the old entries */
rc = cmm_remove_entries(env, mo, rdpg, end, &len);
RETURN(rc);
}
+
#define SPLIT_PAGE_COUNT 1
+
static int cmm_scan_and_split(const struct lu_env *env,
- struct md_object *mo, struct md_attr *ma)
+ struct md_object *mo,
+ struct md_attr *ma)
{
struct cmm_device *cmm = cmm_obj2dev(md2cmm_obj(mo));
+ struct lu_rdpg *rdpg = NULL;
__u32 hash_segement;
- struct lu_rdpg *rdpg = NULL;
int rc = 0, i;
OBD_ALLOC_PTR(rdpg);
rdpg->rp_npages = SPLIT_PAGE_COUNT;
rdpg->rp_count = CFS_PAGE_SIZE * rdpg->rp_npages;
- OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof rdpg->rp_pages[0]);
+ OBD_ALLOC(rdpg->rp_pages, rdpg->rp_npages * sizeof(rdpg->rp_pages[0]));
if (rdpg->rp_pages == NULL)
GOTO(free_rdpg, rc = -ENOMEM);
hash_segement = MAX_HASH_SIZE / (cmm->cmm_tgt_count + 1);
for (i = 1; i < cmm->cmm_tgt_count + 1; i++) {
- struct lu_fid *lf = &ma->ma_lmv->mea_ids[i];
+ struct lu_fid *lf;
__u32 hash_end;
+ lf = &ma->ma_lmv->mea_ids[i];
+
rdpg->rp_hash = i * hash_segement;
hash_end = rdpg->rp_hash + hash_segement;
rc = cmm_split_entries(env, mo, rdpg, lf, hash_end);
if (rc)
GOTO(cleanup, rc);
}
+ EXIT;
cleanup:
for (i = 0; i < rdpg->rp_npages; i++)
if (rdpg->rp_pages[i] != NULL)
__free_pages(rdpg->rp_pages[i], 0);
if (rdpg->rp_pages)
OBD_FREE(rdpg->rp_pages, rdpg->rp_npages *
- sizeof rdpg->rp_pages[0]);
+ sizeof rdpg->rp_pages[0]);
free_rdpg:
if (rdpg)
OBD_FREE_PTR(rdpg);
- RETURN(rc);
-}
-
-static struct lu_buf *cmm_buf_get(const struct lu_env *env, void *area,
- ssize_t len)
-{
- struct lu_buf *buf;
-
- buf = &cmm_env_info(env)->cmi_buf;
- buf->lb_buf = area;
- buf->lb_len = len;
- return buf;
+ return rc;
}
-int cml_try_to_split(const struct lu_env *env, struct md_object *mo)
+int cmm_try_to_split(const struct lu_env *env, struct md_object *mo)
{
struct cmm_device *cmm = cmm_obj2dev(md2cmm_obj(mo));
- struct md_attr *ma;
+ struct md_attr *ma = &cmm_env_info(env)->cmi_ma;
struct lu_buf *buf;
int rc = 0;
ENTRY;
LASSERT(S_ISDIR(lu_object_attr(&mo->mo_lu)));
+ memset(ma, 0, sizeof(*ma));
- OBD_ALLOC_PTR(ma);
- if (ma == NULL)
- RETURN(-ENOMEM);
-
- ma->ma_need = MA_INODE|MA_LMV;
- rc = mo_attr_get(env, mo, ma);
- if (rc)
- GOTO(cleanup, ma);
-
- /* step1: checking whether the dir need to be splitted */
+ /* Step1: Checking whether the dir needs to be split. */
rc = cmm_expect_splitting(env, mo, ma);
if (rc != CMM_EXPECT_SPLIT)
GOTO(cleanup, rc = 0);
- /* Disable trans for splitting, since there will be
- * so many trans in this one ops, confilct with current
- * recovery design */
+ /*
+ * Disable trans for splitting, since there will be so many trans in
+ * this one ops, confilct with current recovery design.
+ */
rc = cmm_upcall(env, &cmm->cmm_md_dev, MD_NO_TRANS);
if (rc)
GOTO(cleanup, rc = 0);
- /* step2: create slave objects */
- rc = cmm_create_slave_objects(env, mo, ma);
+ /* Step2: Create slave objects (on slave MDTs) */
+ rc = cmm_slaves_create(env, mo, ma);
if (rc)
GOTO(cleanup, ma);
- /* step3: scan and split the object */
+ /* Step3: Scan and split the object. */
rc = cmm_scan_and_split(env, mo, ma);
if (rc)
GOTO(cleanup, ma);
buf = cmm_buf_get(env, ma->ma_lmv, ma->ma_lmv_size);
- /* step4: set mea to the master object */
- rc = mo_xattr_set(env, md_object_next(mo), buf, MDS_LMV_MD_NAME, 0);
- if (rc == -ERESTART)
- CWARN("Dir"DFID" has been split \n",
- PFID(lu_object_fid(&mo->mo_lu)));
+
+ /* Step4: Set mea to the master object. */
+ rc = mo_xattr_set(env, md_object_next(mo), buf,
+ MDS_LMV_MD_NAME, 0);
+ if (rc == -ERESTART) {
+ CWARN("Dir "DFID" has been split\n",
+ PFID(lu_object_fid(&mo->mo_lu)));
+ }
+ EXIT;
cleanup:
if (ma->ma_lmv_size && ma->ma_lmv)
OBD_FREE(ma->ma_lmv, ma->ma_lmv_size);
-
- OBD_FREE_PTR(ma);
- RETURN(rc);
+
+ return rc;
}
+
git://git.whamcloud.com / fs / lustre-release.git / blobdiff