From ba7a737b1260bbafe22097bea08814035c8b655d Mon Sep 17 00:00:00 2001 From: Mohammed Rafi KC Date: Tue, 27 Sep 2016 19:01:48 +0530 Subject: nfs: revalidate lookup converted to fresh lookup when an inode ctx is missing for a linked inode the revalidate lookups are converted to fresh. This could result in sending ESTALE when the gfid are recreated We are not able to reproduce the issue with normal setup, most part of RCA was done with code reading. Possible scenario in which this bug can reproduce, Delete a file and recreate a new file with same name, at the same time from another client process try to list/or access the file. In this case the second client may throw an ESTALE error for such files Thanks to Soumya and Pranith for doing the complete RCA Change-Id: I73992a65844b09a169cefaaedc0dcfb129d66ea1 BUG: 1379720 Signed-off-by: Mohammed Rafi KC Reviewed-on: http://review.gluster.org/15580 NetBSD-regression: NetBSD Build System CentOS-regression: Gluster Build System Smoke: Gluster Build System Reviewed-by: soumya k Reviewed-by: Kaleb KEITHLEY --- xlators/nfs/server/src/mount3.c | 4 ++-- xlators/nfs/server/src/nfs-common.c | 7 +++++-- xlators/nfs/server/src/nfs-common.h | 3 ++- xlators/nfs/server/src/nfs3-helpers.c | 11 ++++++----- 4 files changed, 15 insertions(+), 10 deletions(-) diff --git a/xlators/nfs/server/src/mount3.c b/xlators/nfs/server/src/mount3.c index 5b1da41ef1d..4fb4b757423 100644 --- a/xlators/nfs/server/src/mount3.c +++ b/xlators/nfs/server/src/mount3.c @@ -1059,7 +1059,7 @@ __mnt3_resolve_export_subdir_comp (mnt3_resolve_t *mres) nfs_loc_wipe (&mres->resolveloc); ret = nfs_entry_loc_fill (mres->mstate->nfsx, mres->exp->vol->itable, gfid, nextcomp, &mres->resolveloc, - NFS_RESOLVE_CREATE); + NFS_RESOLVE_CREATE, NULL); if ((ret < 0) && (ret != -2)) { gf_msg (GF_MNT, GF_LOG_ERROR, EFAULT, NFS_MSG_RESOLVE_INODE_FAIL, "Failed to resolve and " @@ -1374,7 +1374,7 @@ __mnt3_resolve_subdir (mnt3_resolve_t *mres) rootgfid[15] = 1; ret = nfs_entry_loc_fill (mres->mstate->nfsx, mres->exp->vol->itable, rootgfid, firstcomp, &mres->resolveloc, - NFS_RESOLVE_CREATE); + NFS_RESOLVE_CREATE, NULL); if ((ret < 0) && (ret != -2)) { gf_msg (GF_MNT, GF_LOG_ERROR, EFAULT, NFS_MSG_RESOLVE_INODE_FAIL, "Failed to resolve and " diff --git a/xlators/nfs/server/src/nfs-common.c b/xlators/nfs/server/src/nfs-common.c index d9ea1e1ac47..af37f6b264c 100644 --- a/xlators/nfs/server/src/nfs-common.c +++ b/xlators/nfs/server/src/nfs-common.c @@ -308,7 +308,7 @@ err: */ int nfs_entry_loc_fill (xlator_t *this, inode_table_t *itable, uuid_t pargfid, - char *entry, loc_t *loc, int how) + char *entry, loc_t *loc, int how, gf_boolean_t *freshlookup) { inode_t *parent = NULL; inode_t *entryinode = NULL; @@ -337,8 +337,11 @@ nfs_entry_loc_fill (xlator_t *this, inode_table_t *itable, uuid_t pargfid, * that the caller can use the filled loc to call * lookup. */ - if (!entryinode) + if (!entryinode) { entryinode = inode_new (itable); + if (freshlookup) + *freshlookup = _gf_true; + } /* Cannot change ret because that must * continue to have -2. */ diff --git a/xlators/nfs/server/src/nfs-common.h b/xlators/nfs/server/src/nfs-common.h index 77bdfb0bbf0..8c9a1e33457 100644 --- a/xlators/nfs/server/src/nfs-common.h +++ b/xlators/nfs/server/src/nfs-common.h @@ -57,7 +57,8 @@ nfs_ino_loc_fill (inode_table_t *itable, uuid_t gfid, loc_t *l); extern int nfs_entry_loc_fill (xlator_t *this, inode_table_t *itable, uuid_t pargfid, - char *entry, loc_t *loc, int how); + char *entry, loc_t *loc, int how, + gf_boolean_t *freshlookup); extern int nfs_root_loc_fill (inode_table_t *itable, loc_t *loc); diff --git a/xlators/nfs/server/src/nfs3-helpers.c b/xlators/nfs/server/src/nfs3-helpers.c index 5ed57bde0e2..0b977092fbb 100644 --- a/xlators/nfs/server/src/nfs3-helpers.c +++ b/xlators/nfs/server/src/nfs3-helpers.c @@ -3757,8 +3757,9 @@ out: int nfs3_fh_resolve_entry_hard (nfs3_call_state_t *cs) { - int ret = -EFAULT; - nfs_user_t nfu = {0, }; + int ret = -EFAULT; + nfs_user_t nfu = {0, }; + gf_boolean_t freshlookup = _gf_false; if (!cs) return ret; @@ -3771,7 +3772,7 @@ nfs3_fh_resolve_entry_hard (nfs3_call_state_t *cs) ret = nfs_entry_loc_fill (cs->nfsx, cs->vol->itable, cs->resolvefh.gfid, cs->resolventry, &cs->resolvedloc, - NFS_RESOLVE_CREATE); + NFS_RESOLVE_CREATE, &freshlookup); if (ret == -2) { gf_msg_trace (GF_NFS3, 0, "Entry needs lookup: %s", @@ -3782,8 +3783,8 @@ nfs3_fh_resolve_entry_hard (nfs3_call_state_t *cs) * go ahead in the resume callback so that an EEXIST gets * handled at posix without an extra fop at this point. */ - if (nfs3_lookup_op (cs) || - (nfs3_create_op (cs) && !nfs3_create_exclusive_op (cs))) { + if (freshlookup && (nfs3_lookup_op (cs) || + (nfs3_create_op (cs) && !nfs3_create_exclusive_op (cs)))) { cs->lookuptype = GF_NFS3_FRESH; cs->resolve_ret = 0; cs->hardresolved = 0; -- cgit