From b1839e0e6c1a4d25118aefa0c8ec36955280320a Mon Sep 17 00:00:00 2001 From: wang di Date: Thu, 10 Nov 2016 12:30:40 -0500 Subject: [PATCH] staging: lustre: lmv: revalidate the dentry for striped dir If there are bad stripe during striped dir revalidation, most likely due the race between close(unlink) and getattr, then let's revalidate the dentry, instead of return error, like normal directory. Signed-off-by: wang di Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6831 Reviewed-on: http://review.whamcloud.com/15720 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7078 Reviewed-on: http://review.whamcloud.com/16382 Reviewed-by: Alex Zhuravlev Reviewed-by: James Simmons Reviewed-by: John L. Hammond Reviewed-by: Oleg Drokin Signed-off-by: James Simmons Signed-off-by: Greg Kroah-Hartman --- drivers/staging/lustre/lustre/llite/file.c | 7 +++++ .../staging/lustre/lustre/llite/llite_lib.c | 30 ++++++++++++++++++- .../staging/lustre/lustre/lmv/lmv_intent.c | 11 +++++-- 3 files changed, 45 insertions(+), 3 deletions(-) diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c index 7886840328d0..73a680e86c4f 100644 --- a/drivers/staging/lustre/lustre/llite/file.c +++ b/drivers/staging/lustre/lustre/llite/file.c @@ -2674,6 +2674,13 @@ static int ll_inode_revalidate_fini(struct inode *inode, int rc) /* Already unlinked. Just update nlink and return success */ if (rc == -ENOENT) { clear_nlink(inode); + /* If it is striped directory, and there is bad stripe + * Let's revalidate the dentry again, instead of returning + * error + */ + if (S_ISDIR(inode->i_mode) && ll_i2info(inode)->lli_lsm_md) + return 0; + /* This path cannot be hit for regular files unless in * case of obscure races, so no need to validate size. */ diff --git a/drivers/staging/lustre/lustre/llite/llite_lib.c b/drivers/staging/lustre/lustre/llite/llite_lib.c index 154282ea211d..ff8608cd32eb 100644 --- a/drivers/staging/lustre/lustre/llite/llite_lib.c +++ b/drivers/staging/lustre/lustre/llite/llite_lib.c @@ -1203,16 +1203,44 @@ static int ll_update_lsm_md(struct inode *inode, struct lustre_md *md) /* set the directory layout */ if (!lli->lli_lsm_md) { + struct cl_attr *attr; + rc = ll_init_lsm_md(inode, md); if (rc) return rc; - lli->lli_lsm_md = lsm; /* * set lsm_md to NULL, so the following free lustre_md * will not free this lsm */ md->lmv = NULL; + lli->lli_lsm_md = lsm; + + attr = kzalloc(sizeof(*attr), GFP_NOFS); + if (!attr) + return -ENOMEM; + + /* validate the lsm */ + rc = md_merge_attr(ll_i2mdexp(inode), lsm, attr, + ll_md_blocking_ast); + if (rc) { + kfree(attr); + return rc; + } + + if (md->body->mbo_valid & OBD_MD_FLNLINK) + md->body->mbo_nlink = attr->cat_nlink; + if (md->body->mbo_valid & OBD_MD_FLSIZE) + md->body->mbo_size = attr->cat_size; + if (md->body->mbo_valid & OBD_MD_FLATIME) + md->body->mbo_atime = attr->cat_atime; + if (md->body->mbo_valid & OBD_MD_FLCTIME) + md->body->mbo_ctime = attr->cat_ctime; + if (md->body->mbo_valid & OBD_MD_FLMTIME) + md->body->mbo_mtime = attr->cat_mtime; + + kfree(attr); + CDEBUG(D_INODE, "Set lsm %p magic %x to "DFID"\n", lsm, lsm->lsm_md_magic, PFID(ll_inode2fid(inode))); return 0; diff --git a/drivers/staging/lustre/lustre/lmv/lmv_intent.c b/drivers/staging/lustre/lustre/lmv/lmv_intent.c index 9f4e826bb0af..b1071cf5a70c 100644 --- a/drivers/staging/lustre/lustre/lmv/lmv_intent.c +++ b/drivers/staging/lustre/lustre/lmv/lmv_intent.c @@ -223,7 +223,14 @@ int lmv_revalidate_slaves(struct obd_export *exp, LASSERT(body); if (unlikely(body->mbo_nlink < 2)) { - CERROR("%s: nlink %d < 2 corrupt stripe %d "DFID":" DFID"\n", + /* + * If this is bad stripe, most likely due + * to the race between close(unlink) and + * getattr, let's return -EONENT, so llite + * will revalidate the dentry see + * ll_inode_revalidate_fini() + */ + CDEBUG(D_INODE, "%s: nlink %d < 2 corrupt stripe %d "DFID":" DFID"\n", obd->obd_name, body->mbo_nlink, i, PFID(&lsm->lsm_md_oinfo[i].lmo_fid), PFID(&lsm->lsm_md_oinfo[0].lmo_fid)); @@ -233,7 +240,7 @@ int lmv_revalidate_slaves(struct obd_export *exp, it.it_lock_mode = 0; } - rc = -EIO; + rc = -ENOENT; goto cleanup; } -- 2.20.1