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authorJiffin Tony Thottan <jthottan@redhat.com>2015-03-11 14:20:48 +0530
committerKaleb KEITHLEY <kkeithle@redhat.com>2015-05-05 18:05:24 -0700
commitfa0ad231745846918b2625d0e1a89c0a5c3c24dc (patch)
tree35ff8022e965847d19198277414636f785172e61 /api/src
parenta5fc34604aef973606431bf7d873abb91ee03d5a (diff)
libgfapi : anonymous fd support
Anonymous fd's are floating fd assigned to a glusterfs client without a explicit file open. Here either it will create a new anonymous fd or existing anonymous fd in the client stack for requested file.The anonymous fd's are mainly used for IO's. This patch introduces two api's glfs_h_anonymous_read and glfs_h_anonymous_write which performs read and write respectively Change-Id: Id646f2220e8387b2f8bb244c848dc1db6761444f BUG: 1204651 Signed-off-by: Jiffin Tony Thottan <jthottan@redhat.com> Reviewed-by: Niels de Vos <ndevos@redhat.com> Reviewed-on: http://review.gluster.org/9971 Tested-by: Gluster Build System <jenkins@build.gluster.com>
Diffstat (limited to 'api/src')
-rw-r--r--api/src/gfapi.aliases3
-rw-r--r--api/src/gfapi.map2
-rw-r--r--api/src/glfs-fops.c155
-rw-r--r--api/src/glfs-handleops.c48
-rw-r--r--api/src/glfs-handles.h10
-rw-r--r--api/src/glfs-internal.h8
6 files changed, 226 insertions, 0 deletions
diff --git a/api/src/gfapi.aliases b/api/src/gfapi.aliases
index 6d48ecdf2c9..9776c87fdcb 100644
--- a/api/src/gfapi.aliases
+++ b/api/src/gfapi.aliases
@@ -131,6 +131,9 @@ _pub_glfs_h_acl_set _glfs_h_acl_set$GFAPI_3.7.0
_pub_glfs_h_acl_get _glfs_h_acl_get$GFAPI_3.7.0
_pub_glfs_h_statfs _glfs_h_statfs$GFAPI_3.7.0
+_pub_glfs_h_anonymous_read _glfs_h_anonymous_read$GFAPI_3.7.0
+_pub_glfs_h_anonymous_write _glfs_h_anonymous_write$GFAPI_3.7.0
+
_priv_glfs_free_from_ctx _glfs_free_from_ctx$GFAPI_PRIVATE_3.7.0
_priv_glfs_new_from_ctx _glfs_new_from_ctx$GFAPI_PRIVATE_3.7.0
_priv_glfs_resolve _glfs_resolve$GFAPI_PRIVATE_3.7.0
diff --git a/api/src/gfapi.map b/api/src/gfapi.map
index 24209d666dc..48863985135 100644
--- a/api/src/gfapi.map
+++ b/api/src/gfapi.map
@@ -152,6 +152,8 @@ GFAPI_3.7.0 {
glfs_h_acl_set;
glfs_h_acl_get;
glfs_h_statfs;
+ glfs_h_anonymous_read;
+ glfs_h_anonymous_write;
} GFAPI_3.6.0;
GFAPI_PRIVATE_3.7.0 {
diff --git a/api/src/glfs-fops.c b/api/src/glfs-fops.c
index 4aad28005f2..08f0884c7ee 100644
--- a/api/src/glfs-fops.c
+++ b/api/src/glfs-fops.c
@@ -3625,3 +3625,158 @@ out:
}
GFAPI_SYMVER_PRIVATE_DEFAULT(glfs_process_upcall_event, 3.7.0);
+
+ssize_t
+glfs_anonymous_pwritev (struct glfs *fs, struct glfs_object *object,
+ const struct iovec *iovec, int iovcnt,
+ off_t offset, int flags)
+{
+ xlator_t *subvol = NULL;
+ struct iobref *iobref = NULL;
+ struct iobuf *iobuf = NULL;
+ struct iovec iov = {0, };
+ inode_t *inode = NULL;
+ fd_t *fd = NULL;
+ int ret = -1;
+ size_t size = -1;
+
+ __glfs_entry_fs (fs);
+
+ subvol = glfs_active_subvol (fs);
+ if (!subvol) {
+ ret = -1;
+ errno = EIO;
+ goto out;
+ }
+
+ /* get/refresh the in arg objects inode in correlation to the xlator */
+ inode = glfs_resolve_inode (fs, subvol, object);
+ if (!inode) {
+ ret = -1;
+ errno = ESTALE;
+ goto out;
+ }
+
+ fd = fd_anonymous (inode);
+ if (!fd) {
+ ret = -1;
+ gf_msg ("gfapi", GF_LOG_ERROR, ENOMEM, API_MSG_FDCREATE_FAILED,
+ "Allocating anonymous fd failed");
+ errno = ENOMEM;
+ goto out;
+ }
+
+ size = iov_length (iovec, iovcnt);
+
+ iobuf = iobuf_get2 (subvol->ctx->iobuf_pool, size);
+ if (!iobuf) {
+ ret = -1;
+ errno = ENOMEM;
+ goto out;
+ }
+
+ iobref = iobref_new ();
+ if (!iobref) {
+ iobuf_unref (iobuf);
+ errno = ENOMEM;
+ ret = -1;
+ goto out;
+ }
+
+ ret = iobref_add (iobref, iobuf);
+ if (ret) {
+ iobuf_unref (iobuf);
+ iobref_unref (iobref);
+ errno = ENOMEM;
+ ret = -1;
+ goto out;
+ }
+
+ iov_unload (iobuf_ptr (iobuf), iovec, iovcnt);
+
+ iov.iov_base = iobuf_ptr (iobuf);
+ iov.iov_len = size;
+
+ ret = syncop_writev (subvol, fd, &iov, 1, offset, iobref, flags,
+ NULL, NULL);
+ DECODE_SYNCOP_ERR (ret);
+
+ iobuf_unref (iobuf);
+ iobref_unref (iobref);
+
+ if (ret <= 0)
+ goto out;
+
+out:
+
+ if (fd)
+ fd_unref(fd);
+
+ glfs_subvol_done (fs, subvol);
+
+ return ret;
+}
+
+ssize_t
+glfs_anonymous_preadv (struct glfs *fs, struct glfs_object *object,
+ const struct iovec *iovec, int iovcnt,
+ off_t offset, int flags)
+{
+ xlator_t *subvol = NULL;
+ struct iovec *iov = NULL;
+ struct iobref *iobref = NULL;
+ inode_t *inode = NULL;
+ fd_t *fd = NULL;
+ int cnt = 0;
+ ssize_t ret = -1;
+ ssize_t size = -1;
+
+ __glfs_entry_fs (fs);
+
+ subvol = glfs_active_subvol (fs);
+ if (!subvol) {
+ ret = -1;
+ errno = EIO;
+ goto out;
+ }
+
+ /* get/refresh the in arg objects inode in correlation to the xlator */
+ inode = glfs_resolve_inode (fs, subvol, object);
+ if (!inode) {
+ ret = -1;
+ errno = ESTALE;
+ goto out;
+ }
+
+ fd = fd_anonymous (inode);
+ if (!fd) {
+ ret = -1;
+ gf_msg ("gfapi", GF_LOG_ERROR, ENOMEM, API_MSG_FDCREATE_FAILED,
+ "Allocating anonymous fd failed");
+ errno = ENOMEM;
+ goto out;
+ }
+
+ size = iov_length (iovec, iovcnt);
+
+ ret = syncop_readv (subvol, fd, size, offset, flags, &iov, &cnt,
+ &iobref, NULL, NULL);
+ DECODE_SYNCOP_ERR (ret);
+ if (ret <= 0)
+ goto out;
+
+ size = iov_copy (iovec, iovcnt, iov, cnt);
+
+ ret = size;
+out:
+ if (iov)
+ GF_FREE (iov);
+ if (iobref)
+ iobref_unref (iobref);
+ if (fd)
+ fd_unref(fd);
+
+ glfs_subvol_done (fs, subvol);
+
+ return ret;
+}
diff --git a/api/src/glfs-handleops.c b/api/src/glfs-handleops.c
index 4a544f7c905..2793e1cb118 100644
--- a/api/src/glfs-handleops.c
+++ b/api/src/glfs-handleops.c
@@ -1962,3 +1962,51 @@ pub_glfs_h_acl_set (struct glfs *fs, struct glfs_object *object,
#endif
GFAPI_SYMVER_PUBLIC_DEFAULT(glfs_h_acl_set, 3.7.0);
GFAPI_SYMVER_PUBLIC_DEFAULT(glfs_h_acl_get, 3.7.0);
+
+/* The API to perform read using anonymous fd */
+ssize_t
+pub_glfs_h_anonymous_read (struct glfs *fs, struct glfs_object *object,
+ const void *buf, size_t count, off_t offset)
+{
+ struct iovec iov = {0, };
+ ssize_t ret = 0;
+
+ /* validate in args */
+ if ((fs == NULL) || (object == NULL)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ iov.iov_base = (void *) buf;
+ iov.iov_len = count;
+
+ ret = glfs_anonymous_preadv (fs, object, &iov, 1, offset, 0);
+
+ return ret;
+}
+
+GFAPI_SYMVER_PUBLIC_DEFAULT(glfs_h_anonymous_read, 3.7.0);
+
+/* The API to perform write using anonymous fd */
+ssize_t
+pub_glfs_h_anonymous_write (struct glfs *fs, struct glfs_object *object,
+ const void *buf, size_t count, off_t offset)
+{
+ struct iovec iov = {0, };
+ ssize_t ret = 0;
+
+ /* validate in args */
+ if ((fs == NULL) || (object == NULL)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ iov.iov_base = (void *) buf;
+ iov.iov_len = count;
+
+ ret = glfs_anonymous_pwritev (fs, object, &iov, 1, offset, 0);
+
+ return ret;
+}
+
+GFAPI_SYMVER_PUBLIC_DEFAULT(glfs_h_anonymous_write, 3.7.0);
diff --git a/api/src/glfs-handles.h b/api/src/glfs-handles.h
index 28e9e79b9a3..19c4e8f7a62 100644
--- a/api/src/glfs-handles.h
+++ b/api/src/glfs-handles.h
@@ -310,6 +310,16 @@ glfs_h_acl_get (struct glfs *fs, struct glfs_object *object,
const acl_type_t type) __THROW;
GFAPI_PUBLIC(glfs_h_acl_get, 3.7.0);
+size_t
+glfs_h_anonymous_write (struct glfs *fs, struct glfs_object *object,
+ const void *buf, size_t count, off_t offset) __THROW
+ GFAPI_PUBLIC(glfs_h_anonymous_write, 3.7.0);
+
+ssize_t
+glfs_h_anonymous_read (struct glfs *fs, struct glfs_object *object,
+ const void *buf, size_t count, off_t offset) __THROW
+ GFAPI_PUBLIC(glfs_h_anonymous_read, 3.7.0);
+
__END_DECLS
#endif /* !_GLFS_HANDLES_H */
diff --git a/api/src/glfs-internal.h b/api/src/glfs-internal.h
index 972f2e4cf49..275f8d1534b 100644
--- a/api/src/glfs-internal.h
+++ b/api/src/glfs-internal.h
@@ -342,4 +342,12 @@ glfs_h_poll_cache_invalidation (struct glfs *fs,
struct callback_arg *up_arg,
struct gf_upcall *upcall_data);
+ssize_t
+glfs_anonymous_preadv (struct glfs *fs, struct glfs_object *object,
+ const struct iovec *iovec, int iovcnt,
+ off_t offset, int flags);
+ssize_t
+glfs_anonymous_pwritev (struct glfs *fs, struct glfs_object *object,
+ const struct iovec *iovec, int iovcnt,
+ off_t offset, int flags);
#endif /* !_GLFS_INTERNAL_H */