From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Simmons Date: Mon, 25 May 2020 18:07:41 -0400 Subject: [lustre-devel] [PATCH 04/45] lnet: merge lnet_md_alloc into lnet_md_build. In-Reply-To: <1590444502-20533-1-git-send-email-jsimmons@infradead.org> References: <1590444502-20533-1-git-send-email-jsimmons@infradead.org> Message-ID: <1590444502-20533-5-git-send-email-jsimmons@infradead.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lustre-devel@lists.lustre.org From: Mr NeilBrown lnet_md_alloc is only called twice, each time immediately before a call to lnet_md_build(), and these are the only calls to lnet_md_build(). So simplify the code by merging lnet_md_alloc into lnet_md_build. WC-bug-id: https://jira.whamcloud.com/browse/LU-13004 Lustre-commit: c0598f15dd502 ("LU-13004 lnet: merge lnet_md_alloc into lnet_md_build.") Signed-off-by: Mr NeilBrown Reviewed-on: https://review.whamcloud.com/37841 Reviewed-by: Serguei Smirnov Reviewed-by: Shaun Tancheff Reviewed-by: James Simmons Reviewed-by: Oleg Drokin Signed-off-by: James Simmons --- include/linux/lnet/lib-lnet.h | 39 ---------------------- net/lnet/lnet/lib-md.c | 75 +++++++++++++++++++++++++++++-------------- 2 files changed, 51 insertions(+), 63 deletions(-) diff --git a/include/linux/lnet/lib-lnet.h b/include/linux/lnet/lib-lnet.h index d64c9bf..66e01a0 100644 --- a/include/linux/lnet/lib-lnet.h +++ b/include/linux/lnet/lib-lnet.h @@ -215,45 +215,6 @@ static inline int lnet_md_unlinkable(struct lnet_libmd *md) #define MAX_PORTALS 64 -static inline struct lnet_libmd * -lnet_md_alloc(struct lnet_md *umd) -{ - struct lnet_libmd *md; - unsigned int size; - unsigned int niov; - - if (umd->options & LNET_MD_KIOV) { - niov = umd->length; - size = offsetof(struct lnet_libmd, md_iov.kiov[niov]); - } else { - niov = 1; - size = offsetof(struct lnet_libmd, md_iov.iov[niov]); - } - - if (size <= LNET_SMALL_MD_SIZE) { - md = kmem_cache_alloc(lnet_small_mds_cachep, - GFP_NOFS | __GFP_ZERO); - if (md) { - CDEBUG(D_MALLOC, - "slab-alloced 'md' of size %u@%p.\n", - size, md); - } else { - CDEBUG(D_MALLOC, "failed to allocate 'md' of size %u\n", - size); - } - } else { - md = kzalloc(size, GFP_NOFS); - } - if (md) { - /* Set here in case of early free */ - md->md_options = umd->options; - md->md_niov = niov; - INIT_LIST_HEAD(&md->md_list); - } - - return md; -} - struct lnet_libhandle *lnet_res_lh_lookup(struct lnet_res_container *rec, u64 cookie); void lnet_res_lh_initialize(struct lnet_res_container *rec, diff --git a/net/lnet/lnet/lib-md.c b/net/lnet/lnet/lib-md.c index d745b91..a9a83c3 100644 --- a/net/lnet/lnet/lib-md.c +++ b/net/lnet/lnet/lib-md.c @@ -164,12 +164,42 @@ int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset) return cpt; } -static int -lnet_md_build(struct lnet_libmd *lmd, struct lnet_md *umd, int unlink) +static struct lnet_libmd * +lnet_md_build(struct lnet_md *umd, int unlink) { int i; unsigned int niov; int total_length = 0; + struct lnet_libmd *lmd; + unsigned int size; + + if ((umd->options & LNET_MD_KIOV) != 0) { + niov = umd->length; + size = offsetof(struct lnet_libmd, md_iov.kiov[niov]); + } else { + niov = 1; + size = offsetof(struct lnet_libmd, md_iov.iov[niov]); + } + + if (size <= LNET_SMALL_MD_SIZE) { + lmd = kmem_cache_zalloc(lnet_small_mds_cachep, GFP_NOFS); + if (lmd) { + CDEBUG(D_MALLOC, + "slab-alloced 'md' of size %u@%p.\n", + size, lmd); + } else { + CDEBUG(D_MALLOC, "failed to allocate 'md' of size %u\n", + size); + } + } else { + lmd = kzalloc(size, GFP_NOFS); + } + + if (!lmd) + return ERR_PTR(-ENOMEM); + + lmd->md_niov = niov; + INIT_LIST_HEAD(&lmd->md_list); lmd->md_me = NULL; lmd->md_start = umd->start; @@ -192,8 +222,10 @@ int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset) for (i = 0; i < (int)niov; i++) { /* We take the page pointer on trust */ if (lmd->md_iov.kiov[i].bv_offset + - lmd->md_iov.kiov[i].bv_len > PAGE_SIZE) - return -EINVAL; /* invalid length */ + lmd->md_iov.kiov[i].bv_len > PAGE_SIZE) { + lnet_md_free(lmd); + return ERR_PTR(-EINVAL); /* invalid length */ + } total_length += lmd->md_iov.kiov[i].bv_len; } @@ -202,8 +234,10 @@ int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset) if ((umd->options & LNET_MD_MAX_SIZE) && /* max size used */ (umd->max_size < 0 || - umd->max_size > total_length)) /* illegal max_size */ - return -EINVAL; + umd->max_size > total_length)) { /* illegal max_size */ + lnet_md_free(lmd); + return ERR_PTR(-EINVAL); + } } else { /* contiguous */ lmd->md_length = umd->length; niov = 1; @@ -213,11 +247,13 @@ int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset) if ((umd->options & LNET_MD_MAX_SIZE) && /* max size used */ (umd->max_size < 0 || - umd->max_size > (int)umd->length)) /* illegal max_size */ - return -EINVAL; + umd->max_size > (int)umd->length)) { /* illegal max_size */ + lnet_md_free(lmd); + return ERR_PTR(-EINVAL); + } } - return 0; + return lmd; } /* must be called with resource lock held */ @@ -326,13 +362,9 @@ int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset) return -EINVAL; } - md = lnet_md_alloc(&umd); - if (!md) - return -ENOMEM; - - rc = lnet_md_build(md, &umd, unlink); - if (rc) - goto out_free; + md = lnet_md_build(&umd, unlink); + if (IS_ERR(md)) + return PTR_ERR(md); cpt = me->me_cpt; @@ -363,7 +395,6 @@ int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset) out_unlock: lnet_res_unlock(cpt); -out_free: kfree(md); return rc; } @@ -403,13 +434,9 @@ int lnet_cpt_of_md(struct lnet_libmd *md, unsigned int offset) return -EINVAL; } - md = lnet_md_alloc(&umd); - if (!md) - return -ENOMEM; - - rc = lnet_md_build(md, &umd, unlink); - if (rc) - goto out_free; + md = lnet_md_build(&umd, unlink); + if (IS_ERR(md)) + return PTR_ERR(md); if (md->md_length > LNET_MTU) { CERROR("Invalid length: too big transfer size %u, %d max\n", -- 1.8.3.1