Il 12/04/2013 07:52, mrhi...@linux.vnet.ibm.com ha scritto: > From: "Michael R. Hines" <mrhi...@us.ibm.com> > > These are just the prototypes for optional new hooks > that RDMA takes advantage of to perform dynamic page > registration. > > An optional hook is also introduced for a custom function > to be able to override the default save_page function. > > Also included are just the protytpes of the accessor methods used by > arch_init.c which invoke functions inside savevm.c to call > out to the hooks that may (or may not) have been overridden > inside of QEMUFileOps. > > The actual definitions for all of these come later in the patch series. > > Signed-off-by: Michael R. Hines <mrhi...@us.ibm.com> > --- > include/migration/migration.h | 22 ++++++++++++++++++++++ > include/migration/qemu-file.h | 30 ++++++++++++++++++++++++++++++ > 2 files changed, 52 insertions(+) > > diff --git a/include/migration/migration.h b/include/migration/migration.h > index e2acec6..5ab1d73 100644 > --- a/include/migration/migration.h > +++ b/include/migration/migration.h > @@ -21,6 +21,7 @@ > #include "qapi/error.h" > #include "migration/vmstate.h" > #include "qapi-types.h" > +#include "exec/cpu-common.h" > > struct MigrationParams { > bool blk; > @@ -75,6 +76,10 @@ void fd_start_incoming_migration(const char *path, Error > **errp); > > void fd_start_outgoing_migration(MigrationState *s, const char *fdname, > Error **errp); > > +void rdma_start_outgoing_migration(void *opaque, const char *host_port, > Error **errp); > + > +void rdma_start_incoming_migration(const char *host_port, Error **errp); > +
These two declarations should have been in patch 2. > void migrate_fd_error(MigrationState *s); > > void migrate_fd_connect(MigrationState *s); > @@ -127,4 +132,21 @@ int migrate_use_xbzrle(void); > int64_t migrate_xbzrle_cache_size(void); > > int64_t xbzrle_cache_resize(int64_t new_size); > + > +bool migrate_chunk_register_destination(void); This declaration must be in patch 5. > +void ram_control_before_iterate(QEMUFile *f, uint32_t flags); > +void ram_control_after_iterate(QEMUFile *f, uint32_t flags); > +void ram_control_load_hook(QEMUFile *f, uint32_t flags); > + > +/* Whenever this is found in the data stream, the flags > + * will be passed to ram_control_load_hook in the incoming-migration > + * side. This lets before_ram_iterate/after_ram_iterate add > + * transport-specific sections to the RAM migration data. > + */ > +#define RAM_SAVE_FLAG_HOOK 0x80 > + > +size_t ram_control_save_page(QEMUFile *f, > + ram_addr_t block_offset, ram_addr_t offset, > + size_t size, uint8_t *va); > + > #endif > diff --git a/include/migration/qemu-file.h b/include/migration/qemu-file.h > index 623c434..9d23ff3 100644 > --- a/include/migration/qemu-file.h > +++ b/include/migration/qemu-file.h > @@ -23,6 +23,7 @@ > */ > #ifndef QEMU_FILE_H > #define QEMU_FILE_H 1 > +#include "exec/cpu-common.h" > > /* This function writes a chunk of data to a file at the given position. > * The pos argument can be ignored if the file is only being used for > @@ -57,12 +58,39 @@ typedef int (QEMUFileGetFD)(void *opaque); > typedef ssize_t (QEMUFileWritevBufferFunc)(void *opaque, struct iovec *iov, > int iovcnt); > > +/* > + * This function provides hooks around different > + * stages of RAM migration. > + */ > +typedef int (QEMURamHookFunc)(QEMUFile *f, void *opaque, uint32_t flags); > + > +/* > + * Constants used by ram_control_* hooks > + */ > +#define RAM_CONTROL_SETUP 0 > +#define RAM_CONTROL_ROUND 1 > +#define RAM_CONTROL_HOOK 2 > +#define RAM_CONTROL_FINISH 3 > + > +/* > + * This function allows override of where the RAM page > + * is saved (such as RDMA, for example.) > + */ > +typedef size_t (QEMURamSaveFunc)(QEMUFile *f, void *opaque, > + ram_addr_t block_offset, > + ram_addr_t offset, > + size_t size, uint8_t *va); > + > typedef struct QEMUFileOps { > QEMUFilePutBufferFunc *put_buffer; > QEMUFileGetBufferFunc *get_buffer; > QEMUFileCloseFunc *close; > QEMUFileGetFD *get_fd; > QEMUFileWritevBufferFunc *writev_buffer; > + QEMURamHookFunc *before_ram_iterate; > + QEMURamHookFunc *after_ram_iterate; > + QEMURamHookFunc *hook_ram_load; > + QEMURamSaveFunc *save_page; Without these, patch 2 cannot compile with --enable-rdma. > } QEMUFileOps; > > QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops); > @@ -81,6 +109,8 @@ void qemu_put_byte(QEMUFile *f, int v); > */ > void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, int size); > > +bool qemu_file_mode_is_not_valid(const char *mode); This declaration must be in patch 4. Please reorder patches 2-3-4-5 as follows: - rdma: new QEMUFileOps hooks && rdma: implement new QEMUFileOps hooks (squashed) - rdma: introduce capability for chunk registration (with fixed declaration) - rdma: core rdma logic (with fixed declaration). Since you are at it, please add "x-" to both the capability and the transport. I'm a fan of releasing early, so this is my last request now. Paolo > static inline void qemu_put_ubyte(QEMUFile *f, unsigned int v) > { > qemu_put_byte(f, (int)v); >