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authorShehjar Tikoo <shehjart@gluster.com>2010-09-14 02:39:11 +0000
committerVijay Bellur <vijay@dev.gluster.com>2010-09-14 02:32:03 -0700
commit9ff89d858075d8f916c76a9ade84b9844da4d23e (patch)
tree535ea0f8456078a74eeeb920edc646cf58c9beee /xlators/nfs/server/src/nfs3-fh.h
parent2152dae595438b919fbcb7349d15ead139e120d8 (diff)
nfs,nfs3,mnt3: Transition fh resolution to gfid
Signed-off-by: Shehjar Tikoo <shehjart@gluster.com> Signed-off-by: Vijay Bellur <vijay@dev.gluster.com> BUG: 971 (dynamic volume management) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=971
Diffstat (limited to 'xlators/nfs/server/src/nfs3-fh.h')
-rw-r--r--xlators/nfs/server/src/nfs3-fh.h36
1 files changed, 24 insertions, 12 deletions
diff --git a/xlators/nfs/server/src/nfs3-fh.h b/xlators/nfs/server/src/nfs3-fh.h
index 4ee4423951c..987063e7407 100644
--- a/xlators/nfs/server/src/nfs3-fh.h
+++ b/xlators/nfs/server/src/nfs3-fh.h
@@ -29,13 +29,14 @@
#include "xdr-nfs3.h"
#include "iatt.h"
#include <sys/types.h>
+#include "uuid.h"
/* BIG FAT WARNING: The file handle code is tightly coupled to NFSv3 file
* handles for now. This will change if and when we need v4. */
#define GF_NFSFH_IDENT0 ':'
#define GF_NFSFH_IDENT1 'O'
#define GF_NFSFH_IDENT_SIZE (sizeof(char) * 2)
-#define GF_NFSFH_STATIC_SIZE (GF_NFSFH_IDENT_SIZE + sizeof (uint16_t) + sizeof (uint16_t) + sizeof (uint64_t) + sizeof(uint64_t))
+#define GF_NFSFH_STATIC_SIZE (GF_NFSFH_IDENT_SIZE + (2*sizeof (uuid_t)) + sizeof (uint16_t))
#define GF_NFSFH_MAX_HASH_BYTES (NFS3_FHSIZE - GF_NFSFH_STATIC_SIZE)
/* Each hash element in the file handle is of 2 bytes thus giving
@@ -46,6 +47,7 @@ typedef uint16_t nfs3_hash_entry_t;
#define GF_NFSFH_MAXHASHES ((int)(GF_NFSFH_MAX_HASH_BYTES / GF_NFSFH_ENTRYHASH_SIZE))
#define nfs3_fh_hashcounted_size(hcount) (GF_NFSFH_STATIC_SIZE + (hcount * GF_NFSFH_ENTRYHASH_SIZE))
+#define nfs3_fh_exportid_to_index(exprtid) ((uint16_t)exprtid[15])
/* ATTENTION: Change in size of the structure below should be reflected in the
* GF_NFSFH_STATIC_SIZE.
*/
@@ -56,18 +58,28 @@ struct nfs3_fh {
*/
char ident[2];
+ /* UUID that identifies an export. The value stored in exportid
+ * depends on the usage of gluster nfs. If the DVM is enabled using
+ * the nfs.dynamic-volumes option then exportid will contain the UUID
+ * of the volume so that gnfs is able to identify volumes uniquely
+ * through volume additions,deletions,migrations, etc.
+ *
+ * When not using dvm, exportid contains the index of the volume
+ * based on the position of the volume in the list of subvolumes
+ * for gnfs.
+ */
+ uuid_t exportid;
+
+ /* File/dir gfid. */
+ uuid_t gfid;
+
/* Number of file/ino hash elements that follow the ino. */
uint16_t hashcount;
- /* Basically, the position/index of an xlator among the children of
- * the NFS xlator.
- */
- uint16_t xlatorid;
- uint64_t gen;
- uint64_t ino;
nfs3_hash_entry_t entryhash[GF_NFSFH_MAXHASHES];
} __attribute__((__packed__));
+#define GF_NFS3FH_STATIC_INITIALIZER {{0},}
extern uint32_t
nfs3_fh_compute_size (struct nfs3_fh *fh);
@@ -76,16 +88,13 @@ extern int
nfs3_fh_hash_index_is_beyond (struct nfs3_fh *fh, int hashidx);
extern uint16_t
-nfs3_fh_hash_entry (ino_t ino, uint64_t gen);
+nfs3_fh_hash_entry (uuid_t gfid);
extern int
nfs3_fh_validate (struct nfs3_fh *fh);
-extern xlator_t *
-nfs3_fh_to_xlator (xlator_list_t *cl, struct nfs3_fh *fh);
-
extern struct nfs3_fh
-nfs3_fh_build_root_fh (xlator_list_t *cl, xlator_t *xl);
+nfs3_fh_build_indexed_root_fh (xlator_list_t *cl, xlator_t *xl);
extern int
nfs3_fh_is_root_fh (struct nfs3_fh *fh);
@@ -103,4 +112,7 @@ nfs3_fh_to_str (struct nfs3_fh *fh, char *str);
extern int
nfs3_fh_build_parent_fh (struct nfs3_fh *child, struct iatt *newstat,
struct nfs3_fh *newfh);
+
+extern struct nfs3_fh
+nfs3_fh_build_uuid_root_fh (uuid_t volumeid);
#endif