# include <linux/utsname.h>
#include "../include/lustre_acl.h"
+#include "../include/lustre/lustre_ioctl.h"
#include "../include/obd_class.h"
+#include "../include/lustre_lmv.h"
#include "../include/lustre_fid.h"
#include "../include/lprocfs_status.h"
#include "../include/lustre_param.h"
struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
int rc;
- /* mdc_enter_request() ensures that this client has no more
+ /* obd_get_request_slot() ensures that this client has no more
* than cl_max_rpcs_in_flight RPCs simultaneously inf light
* against an MDT.
*/
- rc = mdc_enter_request(cli);
+ rc = obd_get_request_slot(cli);
if (rc != 0)
return rc;
rc = ptlrpc_queue_wait(req);
- mdc_exit_request(cli);
+ obd_put_request_slot(cli);
return rc;
}
goto out;
}
- *rootfid = body->fid1;
+ *rootfid = body->mbo_fid1;
CDEBUG(D_NET,
"root fid="DFID", last_committed=%llu\n",
PFID(rootfid),
if (!body)
return -EPROTO;
- CDEBUG(D_NET, "mode: %o\n", body->mode);
+ CDEBUG(D_NET, "mode: %o\n", body->mbo_mode);
mdc_update_max_ea_from_body(exp, body);
- if (body->eadatasize != 0) {
+ if (body->mbo_eadatasize != 0) {
eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
- body->eadatasize);
+ body->mbo_eadatasize);
if (!eadata)
return -EPROTO;
}
return rc;
}
-static int mdc_is_subdir(struct obd_export *exp,
- const struct lu_fid *pfid,
- const struct lu_fid *cfid,
- struct ptlrpc_request **request)
-{
- struct ptlrpc_request *req;
- int rc;
-
- *request = NULL;
- req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
- &RQF_MDS_IS_SUBDIR, LUSTRE_MDS_VERSION,
- MDS_IS_SUBDIR);
- if (!req)
- return -ENOMEM;
-
- mdc_is_subdir_pack(req, pfid, cfid, 0);
- ptlrpc_request_set_replen(req);
-
- rc = ptlrpc_queue_wait(req);
- if (rc && rc != -EREMOTE)
- ptlrpc_req_finished(req);
- else
- *request = req;
- return rc;
-}
-
static int mdc_xattr_common(struct obd_export *exp,
const struct req_format *fmt,
const struct lu_fid *fid,
void *buf;
int rc;
- if (!body->aclsize)
+ if (!body->mbo_aclsize)
return 0;
- buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->aclsize);
+ buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->mbo_aclsize);
if (!buf)
return -EPROTO;
- acl = posix_acl_from_xattr(&init_user_ns, buf, body->aclsize);
+ acl = posix_acl_from_xattr(&init_user_ns, buf, body->mbo_aclsize);
if (!acl)
return 0;
md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
- if (md->body->valid & OBD_MD_FLEASIZE) {
+ if (md->body->mbo_valid & OBD_MD_FLEASIZE) {
int lmmsize;
struct lov_mds_md *lmm;
- if (!S_ISREG(md->body->mode)) {
+ if (!S_ISREG(md->body->mbo_mode)) {
CDEBUG(D_INFO,
"OBD_MD_FLEASIZE set, should be a regular file, but is not\n");
rc = -EPROTO;
goto out;
}
- if (md->body->eadatasize == 0) {
+ if (md->body->mbo_eadatasize == 0) {
CDEBUG(D_INFO,
"OBD_MD_FLEASIZE set, but eadatasize 0\n");
rc = -EPROTO;
goto out;
}
- lmmsize = md->body->eadatasize;
+ lmmsize = md->body->mbo_eadatasize;
lmm = req_capsule_server_sized_get(pill, &RMF_MDT_MD, lmmsize);
if (!lmm) {
rc = -EPROTO;
goto out;
}
- } else if (md->body->valid & OBD_MD_FLDIREA) {
+ } else if (md->body->mbo_valid & OBD_MD_FLDIREA) {
int lmvsize;
struct lov_mds_md *lmv;
- if (!S_ISDIR(md->body->mode)) {
+ if (!S_ISDIR(md->body->mbo_mode)) {
CDEBUG(D_INFO,
"OBD_MD_FLDIREA set, should be a directory, but is not\n");
rc = -EPROTO;
goto out;
}
- if (md->body->eadatasize == 0) {
+ if (md->body->mbo_eadatasize == 0) {
CDEBUG(D_INFO,
"OBD_MD_FLDIREA is set, but eadatasize 0\n");
return -EPROTO;
}
- if (md->body->valid & OBD_MD_MEA) {
- lmvsize = md->body->eadatasize;
+ if (md->body->mbo_valid & OBD_MD_MEA) {
+ lmvsize = md->body->mbo_eadatasize;
lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
lmvsize);
if (!lmv) {
goto out;
}
- rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
+ rc = obd_unpackmd(md_exp, (void *)&md->lmv, lmv,
lmvsize);
if (rc < 0)
goto out;
- if (rc < sizeof(*md->mea)) {
+ if (rc < sizeof(*md->lmv)) {
CDEBUG(D_INFO,
- "size too small: rc < sizeof(*md->mea) (%d < %d)\n",
- rc, (int)sizeof(*md->mea));
+ "size too small: rc < sizeof(*md->lmv) (%d < %d)\n",
+ rc, (int)sizeof(*md->lmv));
rc = -EPROTO;
goto out;
}
}
rc = 0;
- if (md->body->valid & OBD_MD_FLACL) {
+ if (md->body->mbo_valid & OBD_MD_FLACL) {
/* for ACL, it's possible that FLACL is set but aclsize is zero.
* only when aclsize != 0 there's an actual segment for ACL
* in reply buffer.
*/
- if (md->body->aclsize) {
+ if (md->body->mbo_aclsize) {
rc = mdc_unpack_acl(req, md);
if (rc)
goto out;
file_fh = &och->och_fh;
CDEBUG(D_HA, "updating handle from %#llx to %#llx\n",
- file_fh->cookie, body->handle.cookie);
+ file_fh->cookie, body->mbo_handle.cookie);
old = *file_fh;
- *file_fh = body->handle;
+ *file_fh = body->mbo_handle;
}
close_req = mod->mod_close_req;
if (close_req) {
if (och)
LASSERT(!memcmp(&old, &epoch->handle, sizeof(old)));
DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
- epoch->handle = body->handle;
+ epoch->handle = body->mbo_handle;
}
}
spin_unlock(&open_req->rq_lock);
}
- rec->cr_fid2 = body->fid1;
- rec->cr_ioepoch = body->ioepoch;
- rec->cr_old_handle.cookie = body->handle.cookie;
+ rec->cr_fid2 = body->mbo_fid1;
+ rec->cr_ioepoch = body->mbo_ioepoch;
+ rec->cr_old_handle.cookie = body->mbo_handle.cookie;
open_req->rq_replay_cb = mdc_replay_open;
- if (!fid_is_sane(&body->fid1)) {
+ if (!fid_is_sane(&body->mbo_fid1)) {
DEBUG_REQ(D_ERROR, open_req,
"Saving replay request with insane fid");
LBUG();
imp_connect_disp_stripe(mod->mod_open_req->rq_import))
committed = 1;
- LASSERT(mod->mod_open_req->rq_replay == 0);
-
- DEBUG_REQ(D_RPCTRACE, mod->mod_open_req, "free open request\n");
+ /*
+ * No reason to asssert here if the open request has
+ * rq_replay == 1. It means that mdc_close failed, and
+ * close request wasn`t sent. It is not fatal to client.
+ * The worst thing is eviction if the client gets open lock
+ */
+ DEBUG_REQ(D_RPCTRACE, mod->mod_open_req,
+ "free open request rq_replay = %d\n",
+ mod->mod_open_req->rq_replay);
ptlrpc_request_committed(mod->mod_open_req, committed);
if (mod->mod_close_req)
epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH);
epoch->flags |= MF_SOM_AU;
- if (repbody->valid & OBD_MD_FLGETATTRLOCK)
+ if (repbody->mbo_valid & OBD_MD_FLGETATTRLOCK)
op_data->op_flags |= MF_GETATTR_LOCK;
}
}
req_fmt = &RQF_MDS_RELEASE_CLOSE;
/* allocate a FID for volatile file */
- rc = mdc_fid_alloc(exp, &op_data->op_fid2, op_data);
+ rc = mdc_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
if (rc < 0) {
CERROR("%s: "DFID" failed to allocate FID: %d\n",
obd->obd_name, PFID(&op_data->op_fid1), rc);
}
*request = NULL;
- req = ptlrpc_request_alloc(class_exp2cliimp(exp), req_fmt);
- if (!req)
- return -ENOMEM;
-
- rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
- if (rc) {
- ptlrpc_request_free(req);
- return rc;
- }
-
- /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
- * portal whose threads are not taking any DLM locks and are therefore
- * always progressing
- */
- req->rq_request_portal = MDS_READPAGE_PORTAL;
- ptlrpc_at_set_req_timeout(req);
+ if (OBD_FAIL_CHECK(OBD_FAIL_MDC_CLOSE))
+ req = NULL;
+ else
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), req_fmt);
/* Ensure that this close's handle is fixed up during replay. */
if (likely(mod)) {
CDEBUG(D_HA,
"couldn't find open req; expecting close error\n");
}
+ if (!req) {
+ /*
+ * TODO: repeat close after errors
+ */
+ CWARN("%s: close of FID "DFID" failed, file reference will be dropped when this client unmounts or is evicted\n",
+ obd->obd_name, PFID(&op_data->op_fid1));
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
+ if (rc) {
+ ptlrpc_request_free(req);
+ goto out;
+ }
+
+ /*
+ * To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
+ * portal whose threads are not taking any DLM locks and are therefore
+ * always progressing
+ */
+ req->rq_request_portal = MDS_READPAGE_PORTAL;
+ ptlrpc_at_set_req_timeout(req);
mdc_close_pack(req, op_data);
}
}
+out:
if (mod) {
if (rc != 0)
mod->mod_close_req = NULL;
return rc;
}
-static int mdc_readpage(struct obd_export *exp, struct md_op_data *op_data,
- struct page **pages, struct ptlrpc_request **request)
+static int mdc_getpage(struct obd_export *exp, const struct lu_fid *fid,
+ u64 offset, struct page **pages, int npages,
+ struct ptlrpc_request **request)
{
- struct ptlrpc_request *req;
struct ptlrpc_bulk_desc *desc;
- int i;
- wait_queue_head_t waitq;
- int resends = 0;
- struct l_wait_info lwi;
- int rc;
+ struct ptlrpc_request *req;
+ wait_queue_head_t waitq;
+ struct l_wait_info lwi;
+ int resends = 0;
+ int rc;
+ int i;
*request = NULL;
init_waitqueue_head(&waitq);
req->rq_request_portal = MDS_READPAGE_PORTAL;
ptlrpc_at_set_req_timeout(req);
- desc = ptlrpc_prep_bulk_imp(req, op_data->op_npages, 1, BULK_PUT_SINK,
+ desc = ptlrpc_prep_bulk_imp(req, npages, 1, BULK_PUT_SINK,
MDS_BULK_PORTAL);
if (!desc) {
ptlrpc_request_free(req);
}
/* NB req now owns desc and will free it when it gets freed */
- for (i = 0; i < op_data->op_npages; i++)
+ for (i = 0; i < npages; i++)
ptlrpc_prep_bulk_page_pin(desc, pages[i], 0, PAGE_SIZE);
- mdc_readdir_pack(req, op_data->op_offset,
- PAGE_SIZE * op_data->op_npages,
- &op_data->op_fid1);
+ mdc_readdir_pack(req, offset, PAGE_SIZE * npages, fid);
ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
resends++;
if (!client_should_resend(resends, &exp->exp_obd->u.cli)) {
- CERROR("too many resend retries, returning error\n");
+ CERROR("%s: too many resend retries: rc = %d\n",
+ exp->exp_obd->obd_name, -EIO);
return -EIO;
}
- lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends),
- NULL, NULL, NULL);
+ lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL,
+ NULL);
l_wait_event(waitq, 0, &lwi);
goto restart_bulk;
}
if (req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK) {
- CERROR("Unexpected # bytes transferred: %d (%ld expected)\n",
- req->rq_bulk->bd_nob_transferred,
- PAGE_SIZE * op_data->op_npages);
+ CERROR("%s: unexpected bytes transferred: %d (%ld expected)\n",
+ exp->exp_obd->obd_name, req->rq_bulk->bd_nob_transferred,
+ PAGE_SIZE * npages);
ptlrpc_req_finished(req);
return -EPROTO;
}
return 0;
}
+static void mdc_release_page(struct page *page, int remove)
+{
+ if (remove) {
+ lock_page(page);
+ if (likely(page->mapping))
+ truncate_complete_page(page->mapping, page);
+ unlock_page(page);
+ }
+ put_page(page);
+}
+
+static struct page *mdc_page_locate(struct address_space *mapping, __u64 *hash,
+ __u64 *start, __u64 *end, int hash64)
+{
+ /*
+ * Complement of hash is used as an index so that
+ * radix_tree_gang_lookup() can be used to find a page with starting
+ * hash _smaller_ than one we are looking for.
+ */
+ unsigned long offset = hash_x_index(*hash, hash64);
+ struct page *page;
+ int found;
+
+ spin_lock_irq(&mapping->tree_lock);
+ found = radix_tree_gang_lookup(&mapping->page_tree,
+ (void **)&page, offset, 1);
+ if (found > 0 && !radix_tree_exceptional_entry(page)) {
+ struct lu_dirpage *dp;
+
+ get_page(page);
+ spin_unlock_irq(&mapping->tree_lock);
+ /*
+ * In contrast to find_lock_page() we are sure that directory
+ * page cannot be truncated (while DLM lock is held) and,
+ * hence, can avoid restart.
+ *
+ * In fact, page cannot be locked here at all, because
+ * mdc_read_page_remote does synchronous io.
+ */
+ wait_on_page_locked(page);
+ if (PageUptodate(page)) {
+ dp = kmap(page);
+ if (BITS_PER_LONG == 32 && hash64) {
+ *start = le64_to_cpu(dp->ldp_hash_start) >> 32;
+ *end = le64_to_cpu(dp->ldp_hash_end) >> 32;
+ *hash = *hash >> 32;
+ } else {
+ *start = le64_to_cpu(dp->ldp_hash_start);
+ *end = le64_to_cpu(dp->ldp_hash_end);
+ }
+ if (unlikely(*start == 1 && *hash == 0))
+ *hash = *start;
+ else
+ LASSERTF(*start <= *hash, "start = %#llx,end = %#llx,hash = %#llx\n",
+ *start, *end, *hash);
+ CDEBUG(D_VFSTRACE, "offset %lx [%#llx %#llx], hash %#llx\n",
+ offset, *start, *end, *hash);
+ if (*hash > *end) {
+ kunmap(page);
+ mdc_release_page(page, 0);
+ page = NULL;
+ } else if (*end != *start && *hash == *end) {
+ /*
+ * upon hash collision, remove this page,
+ * otherwise put page reference, and
+ * mdc_read_page_remote() will issue RPC to
+ * fetch the page we want.
+ */
+ kunmap(page);
+ mdc_release_page(page,
+ le32_to_cpu(dp->ldp_flags) & LDF_COLLIDE);
+ page = NULL;
+ }
+ } else {
+ put_page(page);
+ page = ERR_PTR(-EIO);
+ }
+ } else {
+ spin_unlock_irq(&mapping->tree_lock);
+ page = NULL;
+ }
+ return page;
+}
+
+/*
+ * Adjust a set of pages, each page containing an array of lu_dirpages,
+ * so that each page can be used as a single logical lu_dirpage.
+ *
+ * A lu_dirpage is laid out as follows, where s = ldp_hash_start,
+ * e = ldp_hash_end, f = ldp_flags, p = padding, and each "ent" is a
+ * struct lu_dirent. It has size up to LU_PAGE_SIZE. The ldp_hash_end
+ * value is used as a cookie to request the next lu_dirpage in a
+ * directory listing that spans multiple pages (two in this example):
+ * ________
+ * | |
+ * .|--------v------- -----.
+ * |s|e|f|p|ent|ent| ... |ent|
+ * '--|-------------- -----' Each PAGE contains a single
+ * '------. lu_dirpage.
+ * .---------v------- -----.
+ * |s|e|f|p|ent| 0 | ... | 0 |
+ * '----------------- -----'
+ *
+ * However, on hosts where the native VM page size (PAGE_SIZE) is
+ * larger than LU_PAGE_SIZE, a single host page may contain multiple
+ * lu_dirpages. After reading the lu_dirpages from the MDS, the
+ * ldp_hash_end of the first lu_dirpage refers to the one immediately
+ * after it in the same PAGE (arrows simplified for brevity, but
+ * in general e0==s1, e1==s2, etc.):
+ *
+ * .-------------------- -----.
+ * |s0|e0|f0|p|ent|ent| ... |ent|
+ * |---v---------------- -----|
+ * |s1|e1|f1|p|ent|ent| ... |ent|
+ * |---v---------------- -----| Here, each PAGE contains
+ * ... multiple lu_dirpages.
+ * |---v---------------- -----|
+ * |s'|e'|f'|p|ent|ent| ... |ent|
+ * '---|---------------- -----'
+ * v
+ * .----------------------------.
+ * | next PAGE |
+ *
+ * This structure is transformed into a single logical lu_dirpage as follows:
+ *
+ * - Replace e0 with e' so the request for the next lu_dirpage gets the page
+ * labeled 'next PAGE'.
+ *
+ * - Copy the LDF_COLLIDE flag from f' to f0 to correctly reflect whether
+ * a hash collision with the next page exists.
+ *
+ * - Adjust the lde_reclen of the ending entry of each lu_dirpage to span
+ * to the first entry of the next lu_dirpage.
+ */
+#if PAGE_SIZE > LU_PAGE_SIZE
+static void mdc_adjust_dirpages(struct page **pages, int cfs_pgs, int lu_pgs)
+{
+ int i;
+
+ for (i = 0; i < cfs_pgs; i++) {
+ struct lu_dirpage *dp = kmap(pages[i]);
+ __u64 hash_end = le64_to_cpu(dp->ldp_hash_end);
+ __u32 flags = le32_to_cpu(dp->ldp_flags);
+ struct lu_dirpage *first = dp;
+ struct lu_dirent *end_dirent = NULL;
+ struct lu_dirent *ent;
+
+ while (--lu_pgs > 0) {
+ ent = lu_dirent_start(dp);
+ for (end_dirent = ent; ent;
+ end_dirent = ent, ent = lu_dirent_next(ent));
+
+ /* Advance dp to next lu_dirpage. */
+ dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
+
+ /* Check if we've reached the end of the CFS_PAGE. */
+ if (!((unsigned long)dp & ~PAGE_MASK))
+ break;
+
+ /* Save the hash and flags of this lu_dirpage. */
+ hash_end = le64_to_cpu(dp->ldp_hash_end);
+ flags = le32_to_cpu(dp->ldp_flags);
+
+ /* Check if lu_dirpage contains no entries. */
+ if (!end_dirent)
+ break;
+
+ /*
+ * Enlarge the end entry lde_reclen from 0 to
+ * first entry of next lu_dirpage.
+ */
+ LASSERT(!le16_to_cpu(end_dirent->lde_reclen));
+ end_dirent->lde_reclen =
+ cpu_to_le16((char *)(dp->ldp_entries) -
+ (char *)end_dirent);
+ }
+
+ first->ldp_hash_end = hash_end;
+ first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
+ first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
+
+ kunmap(pages[i]);
+ }
+ LASSERTF(lu_pgs == 0, "left = %d", lu_pgs);
+}
+#else
+#define mdc_adjust_dirpages(pages, cfs_pgs, lu_pgs) do {} while (0)
+#endif /* PAGE_SIZE > LU_PAGE_SIZE */
+
+/* parameters for readdir page */
+struct readpage_param {
+ struct md_op_data *rp_mod;
+ __u64 rp_off;
+ int rp_hash64;
+ struct obd_export *rp_exp;
+ struct md_callback *rp_cb;
+};
+
+/**
+ * Read pages from server.
+ *
+ * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains
+ * a header lu_dirpage which describes the start/end hash, and whether this
+ * page is empty (contains no dir entry) or hash collide with next page.
+ * After client receives reply, several pages will be integrated into dir page
+ * in PAGE_SIZE (if PAGE_SIZE greater than LU_PAGE_SIZE), and the
+ * lu_dirpage for this integrated page will be adjusted.
+ **/
+static int mdc_read_page_remote(void *data, struct page *page0)
+{
+ struct readpage_param *rp = data;
+ struct page **page_pool;
+ struct page *page;
+ struct lu_dirpage *dp;
+ int rd_pgs = 0; /* number of pages read actually */
+ int npages;
+ struct md_op_data *op_data = rp->rp_mod;
+ struct ptlrpc_request *req;
+ int max_pages = op_data->op_max_pages;
+ struct inode *inode;
+ struct lu_fid *fid;
+ int i;
+ int rc;
+
+ LASSERT(max_pages > 0 && max_pages <= PTLRPC_MAX_BRW_PAGES);
+ inode = op_data->op_data;
+ fid = &op_data->op_fid1;
+ LASSERT(inode);
+
+ page_pool = kcalloc(max_pages, sizeof(page), GFP_NOFS);
+ if (page_pool) {
+ page_pool[0] = page0;
+ } else {
+ page_pool = &page0;
+ max_pages = 1;
+ }
+
+ for (npages = 1; npages < max_pages; npages++) {
+ page = page_cache_alloc_cold(inode->i_mapping);
+ if (!page)
+ break;
+ page_pool[npages] = page;
+ }
+
+ rc = mdc_getpage(rp->rp_exp, fid, rp->rp_off, page_pool, npages, &req);
+ if (!rc) {
+ int lu_pgs = req->rq_bulk->bd_nob_transferred;
+
+ rd_pgs = (req->rq_bulk->bd_nob_transferred +
+ PAGE_SIZE - 1) >> PAGE_SHIFT;
+ lu_pgs >>= LU_PAGE_SHIFT;
+ LASSERT(!(req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
+
+ CDEBUG(D_INODE, "read %d(%d)/%d pages\n", rd_pgs, lu_pgs,
+ op_data->op_npages);
+
+ mdc_adjust_dirpages(page_pool, rd_pgs, lu_pgs);
+
+ SetPageUptodate(page0);
+ }
+
+ unlock_page(page0);
+ ptlrpc_req_finished(req);
+ CDEBUG(D_CACHE, "read %d/%d pages\n", rd_pgs, npages);
+ for (i = 1; i < npages; i++) {
+ unsigned long offset;
+ __u64 hash;
+ int ret;
+
+ page = page_pool[i];
+
+ if (rc < 0 || i >= rd_pgs) {
+ put_page(page);
+ continue;
+ }
+
+ SetPageUptodate(page);
+
+ dp = kmap(page);
+ hash = le64_to_cpu(dp->ldp_hash_start);
+ kunmap(page);
+
+ offset = hash_x_index(hash, rp->rp_hash64);
+
+ prefetchw(&page->flags);
+ ret = add_to_page_cache_lru(page, inode->i_mapping, offset,
+ GFP_KERNEL);
+ if (!ret)
+ unlock_page(page);
+ else
+ CDEBUG(D_VFSTRACE, "page %lu add to page cache failed: rc = %d\n",
+ offset, ret);
+ put_page(page);
+ }
+
+ if (page_pool != &page0)
+ kfree(page_pool);
+
+ return rc;
+}
+
+/**
+ * Read dir page from cache first, if it can not find it, read it from
+ * server and add into the cache.
+ *
+ * \param[in] exp MDC export
+ * \param[in] op_data client MD stack parameters, transferring parameters
+ * between different layers on client MD stack.
+ * \param[in] cb_op callback required for ldlm lock enqueue during
+ * read page
+ * \param[in] hash_offset the hash offset of the page to be read
+ * \param[in] ppage the page to be read
+ *
+ * retval = 0 get the page successfully
+ * errno(<0) get the page failed
+ */
+static int mdc_read_page(struct obd_export *exp, struct md_op_data *op_data,
+ struct md_callback *cb_op, __u64 hash_offset,
+ struct page **ppage)
+{
+ struct lookup_intent it = { .it_op = IT_READDIR };
+ struct page *page;
+ struct inode *dir = op_data->op_data;
+ struct address_space *mapping;
+ struct lu_dirpage *dp;
+ __u64 start = 0;
+ __u64 end = 0;
+ struct lustre_handle lockh;
+ struct ptlrpc_request *enq_req = NULL;
+ struct readpage_param rp_param;
+ int rc;
+
+ *ppage = NULL;
+
+ LASSERT(dir);
+ mapping = dir->i_mapping;
+
+ rc = mdc_intent_lock(exp, op_data, &it, &enq_req,
+ cb_op->md_blocking_ast, 0);
+ if (enq_req)
+ ptlrpc_req_finished(enq_req);
+
+ if (rc < 0) {
+ CERROR("%s: "DFID" lock enqueue fails: rc = %d\n",
+ exp->exp_obd->obd_name, PFID(&op_data->op_fid1), rc);
+ return rc;
+ }
+
+ rc = 0;
+ lockh.cookie = it.it_lock_handle;
+ mdc_set_lock_data(exp, &lockh, dir, NULL);
+
+ rp_param.rp_off = hash_offset;
+ rp_param.rp_hash64 = op_data->op_cli_flags & CLI_HASH64;
+ page = mdc_page_locate(mapping, &rp_param.rp_off, &start, &end,
+ rp_param.rp_hash64);
+ if (IS_ERR(page)) {
+ CERROR("%s: dir page locate: "DFID" at %llu: rc %ld\n",
+ exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
+ rp_param.rp_off, PTR_ERR(page));
+ rc = PTR_ERR(page);
+ goto out_unlock;
+ } else if (page) {
+ /*
+ * XXX nikita: not entirely correct handling of a corner case:
+ * suppose hash chain of entries with hash value HASH crosses
+ * border between pages P0 and P1. First both P0 and P1 are
+ * cached, seekdir() is called for some entry from the P0 part
+ * of the chain. Later P0 goes out of cache. telldir(HASH)
+ * happens and finds P1, as it starts with matching hash
+ * value. Remaining entries from P0 part of the chain are
+ * skipped. (Is that really a bug?)
+ *
+ * Possible solutions: 0. don't cache P1 is such case, handle
+ * it as an "overflow" page. 1. invalidate all pages at
+ * once. 2. use HASH|1 as an index for P1.
+ */
+ goto hash_collision;
+ }
+
+ rp_param.rp_exp = exp;
+ rp_param.rp_mod = op_data;
+ page = read_cache_page(mapping,
+ hash_x_index(rp_param.rp_off,
+ rp_param.rp_hash64),
+ mdc_read_page_remote, &rp_param);
+ if (IS_ERR(page)) {
+ CERROR("%s: read cache page: "DFID" at %llu: rc %ld\n",
+ exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
+ rp_param.rp_off, PTR_ERR(page));
+ rc = PTR_ERR(page);
+ goto out_unlock;
+ }
+
+ wait_on_page_locked(page);
+ (void)kmap(page);
+ if (!PageUptodate(page)) {
+ CERROR("%s: page not updated: "DFID" at %llu: rc %d\n",
+ exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
+ rp_param.rp_off, -5);
+ goto fail;
+ }
+ if (!PageChecked(page))
+ SetPageChecked(page);
+ if (PageError(page)) {
+ CERROR("%s: page error: "DFID" at %llu: rc %d\n",
+ exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
+ rp_param.rp_off, -5);
+ goto fail;
+ }
+
+hash_collision:
+ dp = page_address(page);
+ if (BITS_PER_LONG == 32 && rp_param.rp_hash64) {
+ start = le64_to_cpu(dp->ldp_hash_start) >> 32;
+ end = le64_to_cpu(dp->ldp_hash_end) >> 32;
+ rp_param.rp_off = hash_offset >> 32;
+ } else {
+ start = le64_to_cpu(dp->ldp_hash_start);
+ end = le64_to_cpu(dp->ldp_hash_end);
+ rp_param.rp_off = hash_offset;
+ }
+ if (end == start) {
+ LASSERT(start == rp_param.rp_off);
+ CWARN("Page-wide hash collision: %#lx\n", (unsigned long)end);
+#if BITS_PER_LONG == 32
+ CWARN("Real page-wide hash collision at [%llu %llu] with hash %llu\n",
+ le64_to_cpu(dp->ldp_hash_start),
+ le64_to_cpu(dp->ldp_hash_end), hash_offset);
+#endif
+ /*
+ * Fetch whole overflow chain...
+ *
+ * XXX not yet.
+ */
+ goto fail;
+ }
+ *ppage = page;
+out_unlock:
+ ldlm_lock_decref(&lockh, it.it_lock_mode);
+ return rc;
+fail:
+ kunmap(page);
+ mdc_release_page(page, 1);
+ rc = -EIO;
+ goto out_unlock;
+}
+
static int mdc_statfs(const struct lu_env *env,
struct obd_export *exp, struct obd_statfs *osfs,
__u64 max_age, __u32 flags)
* with the request RPC to avoid extra RPC round trips
*/
count = mdc_resource_get_unused(exp, &op_data->op_fid1, &cancels,
- LCK_CR, MDS_INODELOCK_LAYOUT);
+ LCK_CR, MDS_INODELOCK_LAYOUT |
+ MDS_INODELOCK_XATTR);
count += mdc_resource_get_unused(exp, &op_data->op_fid2, &cancels,
- LCK_CR, MDS_INODELOCK_LAYOUT);
+ LCK_CR, MDS_INODELOCK_LAYOUT |
+ MDS_INODELOCK_XATTR);
req = ptlrpc_request_alloc(class_exp2cliimp(exp),
&RQF_MDS_SWAP_LAYOUTS);
return rc;
}
-int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
- struct md_op_data *op_data)
+int mdc_fid_alloc(const struct lu_env *env, struct obd_export *exp,
+ struct lu_fid *fid, struct md_op_data *op_data)
{
struct client_obd *cli = &exp->exp_obd->u.cli;
struct lu_client_seq *seq = cli->cl_seq;
- return seq_client_alloc_fid(NULL, seq, fid);
+ return seq_client_alloc_fid(env, seq, fid);
}
static struct obd_uuid *mdc_get_uuid(struct obd_export *exp)
static struct md_ops mdc_md_ops = {
.getstatus = mdc_getstatus,
.null_inode = mdc_null_inode,
- .find_cbdata = mdc_find_cbdata,
.close = mdc_close,
.create = mdc_create,
.done_writing = mdc_done_writing,
.getattr_name = mdc_getattr_name,
.intent_lock = mdc_intent_lock,
.link = mdc_link,
- .is_subdir = mdc_is_subdir,
.rename = mdc_rename,
.setattr = mdc_setattr,
.setxattr = mdc_setxattr,
.getxattr = mdc_getxattr,
.sync = mdc_sync,
- .readpage = mdc_readpage,
+ .read_page = mdc_read_page,
.unlink = mdc_unlink,
.cancel_unused = mdc_cancel_unused,
.init_ea_size = mdc_init_ea_size,
projects / deliverable / linux.git / blobdiff