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authorJeff Darcy <jdarcy@redhat.com>2013-02-18 13:16:39 -0500
committerAnand Avati <avati@redhat.com>2013-02-18 20:50:48 -0800
commit59ac567c8b5ebf20b573ecf250e13f841e817dbd (patch)
treeb16dd6c33140c1ec571145b64bae574e9be0c76d /xlators/cluster/dht/src/dht-common.h
parent6ff25bc98193fd39e25acfce8e3b2f3b3d80a9c8 (diff)
distribute: add hash-name-regex option
This is to support the common "write to temp file then rename" idiom. In our case this causes us to create a linkfile during the rename in (N-1)/N cases, with a significant impact on performance e.g. for UFO which uses this idiom. This patch allows the user to specify up to two regular expressions that separate the permanent and transient parts of a temp-file name: rsync-hash-regex reimplements the existing RSYNC_FRIENDLY_NAME pattern where the temporary name for EXAMPLE is .EXAMPLE.suffix extra-hash-regex can be used for a second pattern, active concurrently, and can include alternatives via the POSIX extended-regex syntax Change-Id: Ic1a6ed19324bc31fefe91ee34b8478877a9c5d2c BUG: 912564 Signed-off-by: Jeff Darcy <jdarcy@redhat.com> Reviewed-on: http://review.gluster.org/4116 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'xlators/cluster/dht/src/dht-common.h')
-rw-r--r--xlators/cluster/dht/src/dht-common.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/xlators/cluster/dht/src/dht-common.h b/xlators/cluster/dht/src/dht-common.h
index 8f266ef8ef9..bd00089fc2c 100644
--- a/xlators/cluster/dht/src/dht-common.h
+++ b/xlators/cluster/dht/src/dht-common.h
@@ -13,6 +13,8 @@
#include "config.h"
#endif
+#include <regex.h>
+
#include "dht-mem-types.h"
#include "libxlator.h"
#include "syncop.h"
@@ -275,6 +277,12 @@ struct dht_conf {
/* Request to filter directory entries in readdir request */
gf_boolean_t readdir_optimize;
+
+ /* Support regex-based name reinterpretation. */
+ regex_t rsync_regex;
+ gf_boolean_t rsync_regex_valid;
+ regex_t extra_regex;
+ gf_boolean_t extra_regex_valid;
};
typedef struct dht_conf dht_conf_t;
@@ -420,7 +428,7 @@ xlator_t *dht_subvol_get_cached (xlator_t *this, inode_t *inode);
xlator_t *dht_subvol_next (xlator_t *this, xlator_t *prev);
int dht_subvol_cnt (xlator_t *this, xlator_t *subvol);
-int dht_hash_compute (int type, const char *name, uint32_t *hash_p);
+int dht_hash_compute (xlator_t *this, int type, const char *name, uint32_t *hash_p);
int dht_linkfile_create (call_frame_t *frame, fop_mknod_cbk_t linkfile_cbk,
xlator_t *tovol, xlator_t *fromvol, loc_t *loc);