diff options
| author | Niels de Vos <ndevos@redhat.com> | 2013-03-15 10:34:45 +0100 |
|---|---|---|
| committer | Vijay Bellur <vbellur@redhat.com> | 2013-08-02 02:14:09 -0700 |
| commit | c95db3046c672473611d9ac0ab6cd93bd8211347 (patch) | |
| tree | 072bfcd45c8c86fec44fce6bd443532c6184300f /libglusterfs/src/store.h | |
| parent | 423aa0d57a031e865374d18cdcc489273317d785 (diff) | |
store: Add (un)locking functionality
Some configuration/cache files (like the NFS rmtab) can be stored on
a GlusterFS volume and be used by multiple storage servers. This
requires suitable locking for the gf_store_handle_t structure. Introduce
gf_store_lock() and gf_store_unlock() for this purpose. The
gf_store_locked_local() function can be used to check if the
gf_store_handle_t has been locked by the current process.
This change also includes an unrelated correction where a FILE* was
getting leaked. Krishnan Parthasarathi identified this while reviewing
the new locking functionality.
Change-Id: I431b7510801841d4bad64480b4bb99d87e2ad347
BUG: 904065
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/4677
Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'libglusterfs/src/store.h')
| -rw-r--r-- | libglusterfs/src/store.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/libglusterfs/src/store.h b/libglusterfs/src/store.h index 4fe432e56de..337103ff73e 100644 --- a/libglusterfs/src/store.h +++ b/libglusterfs/src/store.h @@ -21,6 +21,7 @@ struct gf_store_handle_ { char *path; int fd; FILE *read; + int locked; /* state of lockf() */ }; typedef struct gf_store_handle_ gf_store_handle_t; @@ -99,4 +100,13 @@ gf_store_iter_destroy (gf_store_iter_t *iter); char* gf_store_strerror (gf_store_op_errno_t op_errno); +int +gf_store_lock (gf_store_handle_t *sh); + +void +gf_store_unlock (gf_store_handle_t *sh); + +int +gf_store_locked_local (gf_store_handle_t *sh); + #endif |