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staging: lustre: lmv: revalidate the dentry for striped dir

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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 <di.wang@intel.com>
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 <alexey.zhuravlev@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
wang di 2016-11-10 12:30:40 -05:00 committed by Greg Kroah-Hartman
parent 6736cd0b4b
commit b1839e0e6c
3 changed files with 45 additions and 3 deletions
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7
drivers/staging/lustre/lustre/llite/file.c
View File

@ -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.
*/

30
drivers/staging/lustre/lustre/llite/llite_lib.c
View File

@ -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;

11
drivers/staging/lustre/lustre/lmv/lmv_intent.c
View File

@ -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;
}