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staging: lustre: obd: remove unused lmv_readpages()/mdc_readpage()
This patch fixes the following compile error by removing the dead codes: "error: 'xxx_readpages' defined but not used". Now that we have md_read_page functionality we can remove all the *_readpage implementations. Signed-off-by: Jian Yu <jian.yu@intel.com> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4669 Reviewed-on: http://review.whamcloud.com/9810 Reviewed-by: John L. Hammond <john.hammond@intel.com> Reviewed-by: Andreas Dilger <andreas.dilger@intel.com> Signed-off-by: James Simmons <jsimmons@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jian Yu
Greg Kroah-Hartman
parent
4f76f0ec09
commit
5ef5ee2555
@ -2223,151 +2223,6 @@ static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
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return rc;
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}
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/*
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* Adjust a set of pages, each page containing an array of lu_dirpages,
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* so that each page can be used as a single logical lu_dirpage.
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*
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* A lu_dirpage is laid out as follows, where s = ldp_hash_start,
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* e = ldp_hash_end, f = ldp_flags, p = padding, and each "ent" is a
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* struct lu_dirent. It has size up to LU_PAGE_SIZE. The ldp_hash_end
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* value is used as a cookie to request the next lu_dirpage in a
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* directory listing that spans multiple pages (two in this example):
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* ________
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* | |
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* .|--------v------- -----.
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* |s|e|f|p|ent|ent| ... |ent|
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* '--|-------------- -----' Each CFS_PAGE contains a single
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* '------. lu_dirpage.
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* .---------v------- -----.
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* |s|e|f|p|ent| 0 | ... | 0 |
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* '----------------- -----'
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*
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* However, on hosts where the native VM page size (PAGE_SIZE) is
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* larger than LU_PAGE_SIZE, a single host page may contain multiple
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* lu_dirpages. After reading the lu_dirpages from the MDS, the
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* ldp_hash_end of the first lu_dirpage refers to the one immediately
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* after it in the same CFS_PAGE (arrows simplified for brevity, but
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* in general e0==s1, e1==s2, etc.):
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*
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* .-------------------- -----.
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* |s0|e0|f0|p|ent|ent| ... |ent|
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* |---v---------------- -----|
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* |s1|e1|f1|p|ent|ent| ... |ent|
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* |---v---------------- -----| Here, each CFS_PAGE contains
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* ... multiple lu_dirpages.
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* |---v---------------- -----|
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* |s'|e'|f'|p|ent|ent| ... |ent|
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* '---|---------------- -----'
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* v
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* .----------------------------.
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* | next CFS_PAGE |
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*
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* This structure is transformed into a single logical lu_dirpage as follows:
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*
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* - Replace e0 with e' so the request for the next lu_dirpage gets the page
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* labeled 'next CFS_PAGE'.
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*
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* - Copy the LDF_COLLIDE flag from f' to f0 to correctly reflect whether
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* a hash collision with the next page exists.
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*
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* - Adjust the lde_reclen of the ending entry of each lu_dirpage to span
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* to the first entry of the next lu_dirpage.
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*/
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#if PAGE_SIZE > LU_PAGE_SIZE
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static void lmv_adjust_dirpages(struct page **pages, int ncfspgs, int nlupgs)
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{
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int i;
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for (i = 0; i < ncfspgs; i++) {
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struct lu_dirpage *dp = kmap(pages[i]);
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struct lu_dirpage *first = dp;
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struct lu_dirent *end_dirent = NULL;
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struct lu_dirent *ent;
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__u64 hash_end = dp->ldp_hash_end;
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__u32 flags = dp->ldp_flags;
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while (--nlupgs > 0) {
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ent = lu_dirent_start(dp);
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for (end_dirent = ent; ent;
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end_dirent = ent, ent = lu_dirent_next(ent))
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;
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/* Advance dp to next lu_dirpage. */
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dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
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/* Check if we've reached the end of the CFS_PAGE. */
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if (!((unsigned long)dp & ~PAGE_MASK))
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break;
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/* Save the hash and flags of this lu_dirpage. */
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hash_end = dp->ldp_hash_end;
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flags = dp->ldp_flags;
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/* Check if lu_dirpage contains no entries. */
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if (!end_dirent)
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break;
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/* Enlarge the end entry lde_reclen from 0 to
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* first entry of next lu_dirpage.
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*/
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LASSERT(le16_to_cpu(end_dirent->lde_reclen) == 0);
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end_dirent->lde_reclen =
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cpu_to_le16((char *)(dp->ldp_entries) -
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(char *)end_dirent);
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}
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first->ldp_hash_end = hash_end;
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first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
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first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
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kunmap(pages[i]);
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}
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LASSERTF(nlupgs == 0, "left = %d", nlupgs);
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}
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#else
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#define lmv_adjust_dirpages(pages, ncfspgs, nlupgs) do {} while (0)
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#endif /* PAGE_SIZE > LU_PAGE_SIZE */
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static int lmv_readpage(struct obd_export *exp, struct md_op_data *op_data,
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struct page **pages, struct ptlrpc_request **request)
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{
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struct obd_device *obd = exp->exp_obd;
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struct lmv_obd *lmv = &obd->u.lmv;
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__u64 offset = op_data->op_offset;
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int rc;
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int ncfspgs; /* pages read in PAGE_SIZE */
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int nlupgs; /* pages read in LU_PAGE_SIZE */
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struct lmv_tgt_desc *tgt;
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rc = lmv_check_connect(obd);
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if (rc)
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return rc;
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CDEBUG(D_INODE, "READPAGE at %#llx from "DFID"\n",
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offset, PFID(&op_data->op_fid1));
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tgt = lmv_find_target(lmv, &op_data->op_fid1);
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if (IS_ERR(tgt))
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return PTR_ERR(tgt);
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rc = md_readpage(tgt->ltd_exp, op_data, pages, request);
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if (rc != 0)
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return rc;
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ncfspgs = ((*request)->rq_bulk->bd_nob_transferred + PAGE_SIZE - 1)
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>> PAGE_SHIFT;
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nlupgs = (*request)->rq_bulk->bd_nob_transferred >> LU_PAGE_SHIFT;
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LASSERT(!((*request)->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
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LASSERT(ncfspgs > 0 && ncfspgs <= op_data->op_npages);
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CDEBUG(D_INODE, "read %d(%d)/%d pages\n", ncfspgs, nlupgs,
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op_data->op_npages);
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lmv_adjust_dirpages(pages, ncfspgs, nlupgs);
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return rc;
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}
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/**
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* Get current minimum entry from striped directory
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*
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@ -3595,7 +3450,6 @@ static struct md_ops lmv_md_ops = {
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.setattr = lmv_setattr,
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.setxattr = lmv_setxattr,
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.sync = lmv_sync,
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.readpage = lmv_readpage,
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.read_page = lmv_read_page,
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.unlink = lmv_unlink,
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.init_ea_size = lmv_init_ea_size,
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@ -938,87 +938,6 @@ static int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
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return rc;
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}
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static int mdc_readpage(struct obd_export *exp, struct md_op_data *op_data,
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struct page **pages, struct ptlrpc_request **request)
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{
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struct ptlrpc_request *req;
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struct ptlrpc_bulk_desc *desc;
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int i;
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wait_queue_head_t waitq;
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int resends = 0;
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struct l_wait_info lwi;
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int rc;
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*request = NULL;
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init_waitqueue_head(&waitq);
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restart_bulk:
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req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
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if (!req)
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return -ENOMEM;
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rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
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if (rc) {
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ptlrpc_request_free(req);
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return rc;
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}
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req->rq_request_portal = MDS_READPAGE_PORTAL;
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ptlrpc_at_set_req_timeout(req);
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desc = ptlrpc_prep_bulk_imp(req, op_data->op_npages, 1, BULK_PUT_SINK,
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MDS_BULK_PORTAL);
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if (!desc) {
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ptlrpc_request_free(req);
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return -ENOMEM;
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}
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/* NB req now owns desc and will free it when it gets freed */
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for (i = 0; i < op_data->op_npages; i++)
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ptlrpc_prep_bulk_page_pin(desc, pages[i], 0, PAGE_SIZE);
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mdc_readdir_pack(req, op_data->op_offset,
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PAGE_SIZE * op_data->op_npages,
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&op_data->op_fid1);
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ptlrpc_request_set_replen(req);
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rc = ptlrpc_queue_wait(req);
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if (rc) {
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ptlrpc_req_finished(req);
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if (rc != -ETIMEDOUT)
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return rc;
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resends++;
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if (!client_should_resend(resends, &exp->exp_obd->u.cli)) {
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CERROR("too many resend retries, returning error\n");
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return -EIO;
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}
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lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends),
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NULL, NULL, NULL);
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l_wait_event(waitq, 0, &lwi);
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goto restart_bulk;
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}
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rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
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req->rq_bulk->bd_nob_transferred);
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if (rc < 0) {
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ptlrpc_req_finished(req);
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return rc;
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}
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if (req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK) {
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CERROR("Unexpected # bytes transferred: %d (%ld expected)\n",
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req->rq_bulk->bd_nob_transferred,
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PAGE_SIZE * op_data->op_npages);
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ptlrpc_req_finished(req);
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return -EPROTO;
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}
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*request = req;
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return 0;
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}
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static int mdc_getpage(struct obd_export *exp, const struct lu_fid *fid,
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u64 offset, struct page **pages, int npages,
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struct ptlrpc_request **request)
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@ -2979,7 +2898,6 @@ static struct md_ops mdc_md_ops = {
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.setxattr = mdc_setxattr,
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.getxattr = mdc_getxattr,
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.sync = mdc_sync,
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.readpage = mdc_readpage,
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.read_page = mdc_read_page,
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.unlink = mdc_unlink,
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.cancel_unused = mdc_cancel_unused,
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