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authorSoumya Koduri <skoduri@redhat.com>2016-10-06 13:13:44 +0530
committerKaleb KEITHLEY <kkeithle@redhat.com>2016-11-04 03:10:36 -0700
commitf9ed9b87b74fa5868187f3743d04d105b921c510 (patch)
tree81950a96163ba82999b74af6729eef5b4cb7920e
parent8b95ebaf070f3356c37a0929f3519867557e6e91 (diff)
md-cache: Invalidate cache entry for open() with O_TRUNC
When a file is opened with O_TRUNC flag set, its size gets set to '0'. This case needs to be handled in md-cache to avoid sending incorrect cached stat. This is backport of below mainline patch - http://review.gluster.org/#/c/15618/ > Change-Id: I95d1f8a6634734898883ede010c3e7b0b7eb97d9 > BUG: 1382266 > Signed-off-by: Soumya Koduri <skoduri@redhat.com> > Reviewed-on: http://review.gluster.org/15618 > Smoke: Gluster Build System <jenkins@build.gluster.org> > Reviewed-by: jiffin tony Thottan <jthottan@redhat.com> > Tested-by: jiffin tony Thottan <jthottan@redhat.com> > NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> > CentOS-regression: Gluster Build System <jenkins@build.gluster.org> > Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com> > (cherry picked from commit 6ca5d6382f03685b31b12accb095093cf1486603) Change-Id: I00d2b0a6dbafa690235bbc7cd714ec7cc8a13808 BUG: 1391451 Signed-off-by: Soumya Koduri <skoduri@redhat.com> Reviewed-on: http://review.gluster.org/15772 NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.org> Smoke: Gluster Build System <jenkins@build.gluster.org> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
-rw-r--r--xlators/performance/md-cache/src/md-cache.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/xlators/performance/md-cache/src/md-cache.c b/xlators/performance/md-cache/src/md-cache.c
index 74aafdb..5f3cc01 100644
--- a/xlators/performance/md-cache/src/md-cache.c
+++ b/xlators/performance/md-cache/src/md-cache.c
@@ -1511,6 +1511,53 @@ mdc_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags,
}
+static int
+mdc_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, fd_t *fd,
+ dict_t *xdata)
+{
+ mdc_local_t *local = NULL;
+
+ local = frame->local;
+
+ if (op_ret || !local)
+ goto out;
+
+ if (local->fd->flags & O_TRUNC) {
+ /* O_TRUNC modifies file size. Hence invalidate the
+ * cache entry to fetch latest attributes. */
+ mdc_inode_iatt_invalidate (this, local->fd->inode);
+ }
+
+out:
+ MDC_STACK_UNWIND (open, frame, op_ret, op_errno, fd, xdata);
+ return 0;
+}
+
+
+static int
+mdc_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags,
+ fd_t *fd, dict_t *xdata)
+{
+ mdc_local_t *local = NULL;
+
+ if (!fd || !IA_ISREG(fd->inode->ia_type) ||
+ !(fd->flags & O_TRUNC)) {
+ goto out;
+ }
+
+ local = mdc_local_get (frame);
+
+ local->fd = fd_ref (fd);
+
+out:
+ STACK_WIND (frame, mdc_open_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->open,
+ loc, flags, fd, xdata);
+ return 0;
+}
+
+
int
mdc_readv_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
int32_t op_ret, int32_t op_errno,
@@ -2390,6 +2437,7 @@ struct xlator_fops fops = {
.rename = mdc_rename,
.link = mdc_link,
.create = mdc_create,
+ .open = mdc_open,
.readv = mdc_readv,
.writev = mdc_writev,
.setattr = mdc_setattr,