/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Copyright by The HDF Group. * * Copyright by the Board of Trustees of the University of Illinois. * * All rights reserved. * * * * This file is part of HDF5. The full HDF5 copyright notice, including * * terms governing use, modification, and redistribution, is contained in * * the files COPYING and Copyright.html. COPYING can be found at the root * * of the source code distribution tree; Copyright.html can be found at the * * root level of an installed copy of the electronic HDF5 document set and * * is linked from the top-level documents page. It can also be found at * * http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have * * access to either file, you may request a copy from help@hdfgroup.org. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /*------------------------------------------------------------------------- * * Created: H5Ocache.c * Sep 28 2005 * Quincey Koziol * * Purpose: Object header metadata cache virtual functions. * *------------------------------------------------------------------------- */ /****************/ /* Module Setup */ /****************/ #include "H5Omodule.h" /* This source code file is part of the H5O module */ /***********/ /* Headers */ /***********/ #include "H5private.h" /* Generic Functions */ #include "H5Eprivate.h" /* Error handling */ #include "H5FLprivate.h" /* Free lists */ #include "H5MFprivate.h" /* File memory management */ #include "H5Opkg.h" /* Object headers */ #include "H5WBprivate.h" /* Wrapped Buffers */ /****************/ /* Local Macros */ /****************/ /* Set the object header size to speculatively read in */ /* (needs to be more than the object header prefix size to work at all and * should be larger than the largest object type's default object header * size to save the extra I/O operations) */ #define H5O_SPEC_READ_SIZE 512 /******************/ /* Local Typedefs */ /******************/ /********************/ /* Package Typedefs */ /********************/ /********************/ /* Local Prototypes */ /********************/ /* Metadata cache callbacks */ static herr_t H5O__cache_get_load_size(const void *udata, size_t *image_len); static void *H5O__cache_deserialize(const void *image, size_t len, void *udata, hbool_t *dirty); static herr_t H5O__cache_image_len(const void *thing, size_t *image_len, hbool_t *compressed_ptr, size_t *compressed_image_len_ptr); static herr_t H5O__cache_serialize(const H5F_t *f, void *image, size_t len, void *thing); static herr_t H5O__cache_free_icr(void *thing); static herr_t H5O__cache_clear(const H5F_t *f, void *thing, hbool_t about_to_destroy); static herr_t H5O__cache_chk_get_load_size(const void *udata, size_t *image_len); static void *H5O__cache_chk_deserialize(const void *image, size_t len, void *udata, hbool_t *dirty); static herr_t H5O__cache_chk_image_len(const void *thing, size_t *image_len, hbool_t *compressed_ptr, size_t *compressed_image_len_ptr); static herr_t H5O__cache_chk_serialize(const H5F_t *f, void *image, size_t len, void *thing); static herr_t H5O__cache_chk_free_icr(void *thing); static herr_t H5O__cache_chk_clear(const H5F_t *f, void *thing, hbool_t about_to_destroy); /* Chunk proxy routines */ static herr_t H5O__chunk_proxy_dest(H5O_chunk_proxy_t *chunk_proxy); /* Chunk routines */ static herr_t H5O__chunk_deserialize(H5O_t *oh, haddr_t addr, size_t len, const uint8_t *image, H5O_common_cache_ud_t *udata, hbool_t *dirty); static herr_t H5O__chunk_serialize(const H5F_t *f, H5O_t *oh, unsigned chunkno); /* Misc. routines */ static herr_t H5O__add_cont_msg(H5O_cont_msgs_t *cont_msg_info, const H5O_cont_t *cont); /*********************/ /* Package Variables */ /*********************/ /* H5O object header prefix inherits cache-like properties from H5AC */ const H5AC_class_t H5AC_OHDR[1] = {{ H5AC_OHDR_ID, /* Metadata client ID */ "object header", /* Metadata client name (for debugging) */ H5FD_MEM_OHDR, /* File space memory type for client */ H5AC__CLASS_SPECULATIVE_LOAD_FLAG, /* Client class behavior flags */ H5O__cache_get_load_size, /* 'get_load_size' callback */ H5O__cache_deserialize, /* 'deserialize' callback */ H5O__cache_image_len, /* 'image_len' callback */ NULL, /* 'pre_serialize' callback */ H5O__cache_serialize, /* 'serialize' callback */ NULL, /* 'notify' callback */ H5O__cache_free_icr, /* 'free_icr' callback */ H5O__cache_clear, /* 'clear' callback */ NULL, /* 'fsf_size' callback */ }}; /* H5O object header chunk inherits cache-like properties from H5AC */ const H5AC_class_t H5AC_OHDR_CHK[1] = {{ H5AC_OHDR_CHK_ID, /* Metadata client ID */ "object header continuation chunk", /* Metadata client name (for debugging) */ H5FD_MEM_OHDR, /* File space memory type for client */ H5AC__CLASS_NO_FLAGS_SET, /* Client class behavior flags */ H5O__cache_chk_get_load_size, /* 'get_load_size' callback */ H5O__cache_chk_deserialize, /* 'deserialize' callback */ H5O__cache_chk_image_len, /* 'image_len' callback */ NULL, /* 'pre_serialize' callback */ H5O__cache_chk_serialize, /* 'serialize' callback */ NULL, /* 'notify' callback */ H5O__cache_chk_free_icr, /* 'free_icr' callback */ H5O__cache_chk_clear, /* 'clear' callback */ NULL, /* 'fsf_size' callback */ }}; /* Declare external the free list for H5O_unknown_t's */ H5FL_EXTERN(H5O_unknown_t); /* Declare extern the free list for H5O_chunk_proxy_t's */ H5FL_EXTERN(H5O_chunk_proxy_t); /* Declare the free list for H5O_cont_t sequences */ H5FL_SEQ_DEFINE(H5O_cont_t); /*****************************/ /* Library Private Variables */ /*****************************/ /*******************/ /* Local Variables */ /*******************/ /*------------------------------------------------------------------------- * Function: H5O__cache_get_load_size() * * Purpose: Tell the metadata cache how much data to read from file in * the first speculative read for the object header. Note that we do * not have to be concerned about reading past the end of file, as the * cache will clamp the read to avoid this if needed. * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 7/28/14 * *------------------------------------------------------------------------- */ static herr_t H5O__cache_get_load_size(const void H5_ATTR_UNUSED *_udata, size_t *image_len) { FUNC_ENTER_STATIC_NOERR /* Check arguments */ HDassert(image_len); *image_len = H5O_SPEC_READ_SIZE; FUNC_LEAVE_NOAPI(SUCCEED) } /* end H5O__cache_get_load_size() */ /*------------------------------------------------------------------------- * Function: H5O__cache_deserialize * * Purpose: Attempt to deserialize the object header contained in the * supplied buffer, load the data into an instance of H5O_t, and * return a pointer to the new instance. * * Note that the object header is read with with a speculative read. * If the initial read is too small, make note of this fact and return * without error. H5C_load_entry() will note the size discrepency * and retry the deserialize operation with the correct size read. * * Return: Success: Pointer to in core representation * Failure: NULL * * Programmer: John Mainzer * 7/28/14 * *------------------------------------------------------------------------- */ static void * H5O__cache_deserialize(const void *_image, size_t len, void *_udata, hbool_t *dirty) { H5O_t *oh = NULL; /* Object header read in */ H5O_cache_ud_t *udata = (H5O_cache_ud_t *)_udata; /* User data for callback */ const uint8_t *image = (const uint8_t *)_image; /* Pointer into buffer to decode */ size_t prefix_size; /* Size of object header prefix */ size_t buf_size; /* Size of prefix+chunk #0 buffer */ void * ret_value = NULL; /* Return value */ FUNC_ENTER_STATIC /* Check arguments */ HDassert(image); HDassert(len > 0); HDassert(udata); HDassert(udata->common.f); HDassert(udata->common.cont_msg_info); HDassert(dirty); /* Allocate space for the object header data structure */ if(NULL == (oh = H5FL_CALLOC(H5O_t))) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed") /* File-specific, non-stored information */ oh->sizeof_size = H5F_SIZEOF_SIZE(udata->common.f); oh->sizeof_addr = H5F_SIZEOF_ADDR(udata->common.f); /* Check for presence of magic number */ /* (indicates version 2 or later) */ if(!HDmemcmp(image, H5O_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC)) { /* Magic number */ image += H5_SIZEOF_MAGIC; /* Version */ oh->version = *image++; if(H5O_VERSION_2 != oh->version) HGOTO_ERROR(H5E_OHDR, H5E_VERSION, NULL, "bad object header version number") /* Flags */ oh->flags = *image++; if(oh->flags & ~H5O_HDR_ALL_FLAGS) HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, NULL, "unknown object header status flag(s)") /* Number of links to object (unless overridden by refcount message) */ oh->nlink = 1; /* Time fields */ if(oh->flags & H5O_HDR_STORE_TIMES) { uint32_t tmp; /* Temporary value */ UINT32DECODE(image, tmp); oh->atime = (time_t)tmp; UINT32DECODE(image, tmp); oh->mtime = (time_t)tmp; UINT32DECODE(image, tmp); oh->ctime = (time_t)tmp; UINT32DECODE(image, tmp); oh->btime = (time_t)tmp; } /* end if */ else oh->atime = oh->mtime = oh->ctime = oh->btime = 0; /* Attribute fields */ if(oh->flags & H5O_HDR_ATTR_STORE_PHASE_CHANGE) { UINT16DECODE(image, oh->max_compact); UINT16DECODE(image, oh->min_dense); if(oh->max_compact < oh->min_dense) HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, NULL, "bad object header attribute phase change values") } /* end if */ else { oh->max_compact = H5O_CRT_ATTR_MAX_COMPACT_DEF; oh->min_dense = H5O_CRT_ATTR_MIN_DENSE_DEF; } /* end else */ /* First chunk size */ switch(oh->flags & H5O_HDR_CHUNK0_SIZE) { case 0: /* 1 byte size */ oh->chunk0_size = *image++; break; case 1: /* 2 byte size */ UINT16DECODE(image, oh->chunk0_size); break; case 2: /* 4 byte size */ UINT32DECODE(image, oh->chunk0_size); break; case 3: /* 8 byte size */ UINT64DECODE(image, oh->chunk0_size); break; default: HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, NULL, "bad size for chunk 0") } /* end switch */ if(oh->chunk0_size > 0 && oh->chunk0_size < H5O_SIZEOF_MSGHDR_OH(oh)) HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, NULL, "bad object header chunk size") } /* end if */ else { /* Version */ oh->version = *image++; if(H5O_VERSION_1 != oh->version) HGOTO_ERROR(H5E_OHDR, H5E_VERSION, NULL, "bad object header version number") /* Flags */ oh->flags = H5O_CRT_OHDR_FLAGS_DEF; /* Reserved */ image++; /* Number of messages */ UINT16DECODE(image, udata->v1_pfx_nmesgs); /* Link count */ UINT32DECODE(image, oh->nlink); /* Reset unused time fields */ oh->atime = oh->mtime = oh->ctime = oh->btime = 0; /* Reset unused attribute fields */ oh->max_compact = 0; oh->min_dense = 0; /* First chunk size */ UINT32DECODE(image, oh->chunk0_size); if((udata->v1_pfx_nmesgs > 0 && oh->chunk0_size < H5O_SIZEOF_MSGHDR_OH(oh)) || (udata->v1_pfx_nmesgs == 0 && oh->chunk0_size > 0)) HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, NULL, "bad object header chunk size") /* Reserved, in version 1 (for 8-byte alignment padding) */ image += 4; } /* end else */ /* Determine object header prefix length */ prefix_size = (size_t)(image - (const uint8_t *)_image); HDassert((size_t)prefix_size == (size_t)(H5O_SIZEOF_HDR(oh) - H5O_SIZEOF_CHKSUM_OH(oh))); /* Compute the size of the buffer used */ buf_size = oh->chunk0_size + (size_t)H5O_SIZEOF_HDR(oh); /* Check to see if the buffer provided is large enough to contain both * the prefix and the first chunk. If it isn't, make note of the desired * size, but otherwise do nothing. H5C_load_entry() will notice the * discrepency, load the correct size buffer, and retry the deserialize. */ if(len >= buf_size) { /* Parse the first chunk */ if(H5O__chunk_deserialize(oh, udata->common.addr, oh->chunk0_size, (const uint8_t *)_image, &(udata->common), dirty) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "can't deserialize first object header chunk") } /* end if */ else HDassert(!udata->made_attempt); /* Note that we've loaded the object header from the file */ udata->made_attempt = TRUE; /* Set return value */ ret_value = oh; done: /* Release the [possibly partially initialized] object header on errors */ if(!ret_value && oh) if(H5O_free(oh) < 0) HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, NULL, "unable to destroy object header data") FUNC_LEAVE_NOAPI(ret_value) } /* end H5O__cache_deserialize() */ /*------------------------------------------------------------------------- * Function: H5O__cache_image_len * * Purpose: Compute the size in bytes of the specified instance of * H5O_t on disk, and return it in *image_len. On failure, * the value of *image_len is undefined. * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 7/28/14 * *------------------------------------------------------------------------- */ static herr_t H5O__cache_image_len(const void *_thing, size_t *image_len, hbool_t H5_ATTR_UNUSED *compressed_ptr, size_t H5_ATTR_UNUSED *compressed_image_len_ptr) { const H5O_t *oh = (const H5O_t *)_thing; /* Object header to query */ FUNC_ENTER_STATIC_NOERR /* Check arguments */ HDassert(oh); HDassert(oh->cache_info.magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); HDassert(oh->cache_info.type == H5AC_OHDR); HDassert(image_len); /* Report the object header's prefix+first chunk length */ if(oh->chunk0_size) *image_len = (size_t)H5O_SIZEOF_HDR(oh) + oh->chunk0_size; else *image_len = oh->chunk[0].size; FUNC_LEAVE_NOAPI(SUCCEED) } /* end H5O__cache_image_len() */ /********************************/ /* no H5O_cache_pre_serialize() */ /********************************/ /*------------------------------------------------------------------------- * Function: H5O__cache_serialize * * Purpose: Serialize the contents of the supplied object header, and * load this data into the supplied buffer. * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 7/28/14 * *------------------------------------------------------------------------- */ static herr_t H5O__cache_serialize(const H5F_t *f, void *image, size_t len, void *_thing) { H5O_t *oh = (H5O_t *)_thing; /* Object header to encode */ uint8_t *chunk_image; /* Pointer to object header prefix buffer */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_STATIC /* Check arguments */ HDassert(f); HDassert(image); HDassert(oh); HDassert(oh->cache_info.magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); HDassert(oh->cache_info.type == H5AC_OHDR); HDassert(oh->chunk[0].size == len); #ifdef H5O_DEBUG H5O_assert(oh); #endif /* H5O_DEBUG */ /* Point to raw data 'image' for first chunk, which * has room for the prefix */ chunk_image = oh->chunk[0].image; /* Later versions of object header prefix have different format and * also require that chunk 0 always be updated, since the checksum * on the entire block of memory needs to be updated if anything is * modified */ if(oh->version > H5O_VERSION_1) { uint64_t chunk0_size; /* Size of chunk 0's data */ HDassert(oh->chunk[0].size >= (size_t)H5O_SIZEOF_HDR(oh)); chunk0_size = oh->chunk[0].size - (size_t)H5O_SIZEOF_HDR(oh); /* Verify magic number */ HDassert(!HDmemcmp(chunk_image, H5O_HDR_MAGIC, H5_SIZEOF_MAGIC)); chunk_image += H5_SIZEOF_MAGIC; /* Version */ *chunk_image++ = oh->version; /* Flags */ *chunk_image++ = oh->flags; /* Time fields */ if(oh->flags & H5O_HDR_STORE_TIMES) { UINT32ENCODE(chunk_image, oh->atime); UINT32ENCODE(chunk_image, oh->mtime); UINT32ENCODE(chunk_image, oh->ctime); UINT32ENCODE(chunk_image, oh->btime); } /* end if */ /* Attribute fields */ if(oh->flags & H5O_HDR_ATTR_STORE_PHASE_CHANGE) { UINT16ENCODE(chunk_image, oh->max_compact); UINT16ENCODE(chunk_image, oh->min_dense); } /* end if */ /* First chunk size */ switch(oh->flags & H5O_HDR_CHUNK0_SIZE) { case 0: /* 1 byte size */ HDassert(chunk0_size < 256); *chunk_image++ = (uint8_t)chunk0_size; break; case 1: /* 2 byte size */ HDassert(chunk0_size < 65536); UINT16ENCODE(chunk_image, chunk0_size); break; case 2: /* 4 byte size */ /* use <= 2**32 -1 to stay within 4 bytes integer range */ HDassert(chunk0_size <= 4294967295UL); UINT32ENCODE(chunk_image, chunk0_size); break; case 3: /* 8 byte size */ UINT64ENCODE(chunk_image, chunk0_size); break; default: HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, FAIL, "bad size for chunk 0") } /* end switch */ } /* end if */ else { /* Version */ *chunk_image++ = oh->version; /* Reserved */ *chunk_image++ = 0; /* Number of messages */ #ifdef H5O_ENABLE_BAD_MESG_COUNT if(oh->store_bad_mesg_count) UINT16ENCODE(chunk_image, (oh->nmesgs - 1)) else #endif /* H5O_ENABLE_BAD_MESG_COUNT */ UINT16ENCODE(chunk_image, oh->nmesgs); /* Link count */ UINT32ENCODE(chunk_image, oh->nlink); /* First chunk size */ UINT32ENCODE(chunk_image, (oh->chunk[0].size - (size_t)H5O_SIZEOF_HDR(oh))); /* Zero to alignment */ HDmemset(chunk_image, 0, (size_t)(H5O_SIZEOF_HDR(oh) - 12)); chunk_image += (size_t)(H5O_SIZEOF_HDR(oh) - 12); } /* end else */ HDassert((size_t)(chunk_image - oh->chunk[0].image) == (size_t)(H5O_SIZEOF_HDR(oh) - H5O_SIZEOF_CHKSUM_OH(oh))); /* Serialize messages for this chunk */ if(H5O__chunk_serialize(f, oh, (unsigned)0) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTSERIALIZE, FAIL, "unable to serialize first object header chunk") /* copy the chunk into the image -- this is potentially expensive. * Can we rework things so that the object header and the cache * share a buffer? */ HDmemcpy(image, oh->chunk[0].image, len); done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O__cache_serialize() */ /**********************************/ /* no H5O_cache_notify() function */ /**********************************/ /*------------------------------------------------------------------------- * Function: H5O__cache_free_icr * * Purpose: Free the in core representation of the supplied object header. * * Note: The metadata cache sets the object's cache_info.magic to * H5C__H5C_CACHE_ENTRY_T_BAD_MAGIC before calling a free_icr * callback (checked in assert). * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 7/28/14 * *------------------------------------------------------------------------- */ static herr_t H5O__cache_free_icr(void *_thing) { H5O_t *oh = (H5O_t *)_thing; /* Object header to destroy */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_STATIC /* Check arguments */ HDassert(oh); HDassert(oh->cache_info.magic == H5C__H5C_CACHE_ENTRY_T_BAD_MAGIC); HDassert(oh->cache_info.type == H5AC_OHDR); /* Destroy object header */ if(H5O_free(oh) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't destroy object header") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O__cache_free_icr() */ /*------------------------------------------------------------------------- * Function: H5O__cache_clear * * Purpose: Clear all dirty bits associated with this cache entry. * * This is ncessary as the object header cache client maintains * its own dirty bits on individual messages. These dirty bits * used to be cleared by the old V2 metadata cache flush callback, * but now the metadata cache must clear them explicitly, as * the serialize callback does not imply that the data has been * written to disk. * * This callback is also necessary for the parallel case. * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 9/22/14 * *------------------------------------------------------------------------- */ static herr_t #ifdef H5_HAVE_PARALLEL H5O__cache_clear(const H5F_t *f, void *_thing, hbool_t H5_ATTR_UNUSED about_to_destroy) #else H5O__cache_clear(const H5F_t H5_ATTR_UNUSED *f, void *_thing, hbool_t H5_ATTR_UNUSED about_to_destroy) #endif /* H5_HAVE_PARALLEL */ { H5O_t *oh = (H5O_t *)_thing; /* Object header to reset */ unsigned u; /* Local index variable */ herr_t ret_value = SUCCEED; /* Return value */ #ifdef H5_HAVE_PARALLEL FUNC_ENTER_STATIC #else FUNC_ENTER_STATIC_NOERR #endif /* H5_HAVE_PARALLEL */ /* Check arguments */ HDassert(oh); HDassert(oh->cache_info.magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); HDassert(oh->cache_info.type == H5AC_OHDR); #ifdef H5_HAVE_PARALLEL if((oh->nchunks > 0) && (!about_to_destroy)) { /* Scan through chunk 0 (the chunk stored contiguously with this * object header) and cause it to update its image of all entries * currently marked dirty. Must do this in the parallel case, as * it is possible that this processor may clear this object header * several times before flushing it -- thus causing undefined * sections of the image to be written to disk overwriting valid data. */ if(H5O__chunk_serialize(f, oh, 0) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTSERIALIZE, FAIL, "unable to serialize object header chunk") } /* end if */ #endif /* H5_HAVE_PARALLEL */ /* Mark messages stored with the object header (i.e. messages in chunk 0) as clean */ for(u = 0; u < oh->nmesgs; u++) if(oh->mesg[u].chunkno == 0) oh->mesg[u].dirty = FALSE; #ifndef NDEBUG /* Reset the number of messages dirtied by decoding */ oh->ndecode_dirtied = 0; #endif /* NDEBUG */ #ifdef H5_HAVE_PARALLEL done: #endif /* H5_HAVE_PARALLEL */ FUNC_LEAVE_NOAPI(ret_value) } /* end H5O__cache_clear() */ /*------------------------------------------------------------------------- * Function: H5O__cache_chk_get_load_size() * * Purpose: Tell the metadata cache how large the on disk image of the * chunk proxy is, so it can load the image into a buffer for the * deserialize call. In this case, we simply look up the size in * the user data, and return it in *image_len, * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 7/28/14 * *------------------------------------------------------------------------- */ static herr_t H5O__cache_chk_get_load_size(const void *_udata, size_t *image_len) { const H5O_chk_cache_ud_t *udata = (const H5O_chk_cache_ud_t *)_udata; /* User data for callback */ FUNC_ENTER_STATIC_NOERR /* Check arguments */ HDassert(udata); HDassert(udata->oh); HDassert(image_len); *image_len = udata->size; FUNC_LEAVE_NOAPI(SUCCEED) } /* end H5O__cache_chk_get_load_size() */ /*------------------------------------------------------------------------- * Function: H5O__cache_chk_deserialize * * Purpose: Attempt to deserialize the object header continuation chunk * contained in the supplied buffer, load the data into an instance * of H5O_chunk_proxy_t, and return a pointer to the new instance. * * Return: Success: Pointer to in core representation * Failure: NULL * * Programmer: John Mainzer * 7/28/14 * *------------------------------------------------------------------------- */ static void * H5O__cache_chk_deserialize(const void *image, size_t len, void *_udata, hbool_t *dirty) { H5O_chunk_proxy_t *chk_proxy = NULL; /* Chunk proxy object */ H5O_chk_cache_ud_t *udata = (H5O_chk_cache_ud_t *)_udata; /* User data for callback */ void *ret_value = NULL; /* Return value */ FUNC_ENTER_STATIC /* Check arguments */ HDassert(image); HDassert(len > 0); HDassert(udata); HDassert(udata->oh); HDassert(dirty); /* Allocate space for the object header data structure */ if(NULL == (chk_proxy = H5FL_CALLOC(H5O_chunk_proxy_t))) HGOTO_ERROR(H5E_OHDR, H5E_CANTALLOC, NULL, "memory allocation failed") /* Check if we are still decoding the object header */ /* (as opposed to bringing a piece of it back from the file) */ if(udata->decoding) { /* Sanity check */ HDassert(udata->common.f); HDassert(udata->common.cont_msg_info); /* Parse the chunk */ if(H5O__chunk_deserialize(udata->oh, udata->common.addr, udata->size, (const uint8_t *)image, &(udata->common), dirty) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "can't deserialize object header chunk") /* Set the fields for the chunk proxy */ chk_proxy->oh = udata->oh; H5_CHECKED_ASSIGN(chk_proxy->chunkno, unsigned, udata->oh->nchunks - 1, size_t); } /* end if */ else { /* Sanity check */ HDassert(udata->chunkno < udata->oh->nchunks); /* Set the fields for the chunk proxy */ chk_proxy->oh = udata->oh; chk_proxy->chunkno = udata->chunkno; /* Sanity check that the chunk representation we have in memory is * the same as the one being brought in from disk. */ HDassert(0 == HDmemcmp(image, chk_proxy->oh->chunk[chk_proxy->chunkno].image, chk_proxy->oh->chunk[chk_proxy->chunkno].size)); } /* end else */ /* Increment reference count of object header */ if(H5O_inc_rc(udata->oh) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, NULL, "can't increment reference count on object header") /* Set return value */ ret_value = chk_proxy; done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O__cache_chk_deserialize() */ /*------------------------------------------------------------------------- * Function: H5O__cache_chk_image_len * * Purpose: Return the on disk image size of a object header chunk to the * metadata cache via the image_len. * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 7/28/14 * *------------------------------------------------------------------------- */ static herr_t H5O__cache_chk_image_len(const void *_thing, size_t *image_len, hbool_t H5_ATTR_UNUSED *compressed_ptr, size_t H5_ATTR_UNUSED *compressed_image_len_ptr) { const H5O_chunk_proxy_t * chk_proxy = (const H5O_chunk_proxy_t *)_thing; /* Chunk proxy to query */ FUNC_ENTER_STATIC_NOERR /* Check arguments */ HDassert(chk_proxy); HDassert(chk_proxy->cache_info.magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); HDassert(chk_proxy->cache_info.type == H5AC_OHDR_CHK); HDassert(chk_proxy->oh); HDassert(image_len); *image_len = chk_proxy->oh->chunk[chk_proxy->chunkno].size; FUNC_LEAVE_NOAPI(SUCCEED) } /* end H5O__cache_chk_image_len() */ /************************************/ /* no H5O_cache_chk_pre_serialize() */ /************************************/ /*------------------------------------------------------------------------- * Function: H5O__cache_chk_serialize * * Purpose: Given a pointer to an instance of an object header chunk and an * appropriately sized buffer, serialize the contents of the * instance for writing to disk, and copy the serialized data * into the buffer. * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 7/28/14 * *------------------------------------------------------------------------- */ static herr_t H5O__cache_chk_serialize(const H5F_t *f, void *image, size_t len, void *_thing) { H5O_chunk_proxy_t * chk_proxy = (H5O_chunk_proxy_t *)_thing; /* Object header chunk to serialize */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_STATIC /* Check arguments */ HDassert(f); HDassert(image); HDassert(chk_proxy); HDassert(chk_proxy->cache_info.magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); HDassert(chk_proxy->cache_info.type == H5AC_OHDR_CHK); HDassert(chk_proxy->oh); HDassert(chk_proxy->oh->chunk[chk_proxy->chunkno].size == len); /* Serialize messages for this chunk */ if(H5O__chunk_serialize(f, chk_proxy->oh, chk_proxy->chunkno) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTSERIALIZE, FAIL, "unable to serialize object header continuation chunk") /* copy the chunk into the image -- this is potentially expensive. * Can we rework things so that the chunk and the cache share a buffer? */ HDmemcpy(image, chk_proxy->oh->chunk[chk_proxy->chunkno].image, len); done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O__cache_chk_serialize() */ /**************************************/ /* no H5O_cache_chk_notify() function */ /**************************************/ /*------------------------------------------------------------------------- * Function: H5O__cache_chk_free_icr * * Purpose: Free the in core memory associated with the supplied object * header continuation chunk. * * Note: The metadata cache sets the object's cache_info.magic to * H5C__H5C_CACHE_ENTRY_T_BAD_MAGIC before calling a free_icr * callback (checked in assert). * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 7/28/14 * *------------------------------------------------------------------------- */ static herr_t H5O__cache_chk_free_icr(void *_thing) { H5O_chunk_proxy_t * chk_proxy = (H5O_chunk_proxy_t *)_thing; /* Object header chunk proxy to release */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_STATIC /* Check arguments */ HDassert(chk_proxy); HDassert(chk_proxy->cache_info.magic == H5C__H5C_CACHE_ENTRY_T_BAD_MAGIC); HDassert(chk_proxy->cache_info.type == H5AC_OHDR_CHK); /* Destroy object header chunk proxy */ if(H5O__chunk_proxy_dest(chk_proxy) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "unable to destroy object header chunk proxy") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5O__cache_chk_free_icr() */ /*------------------------------------------------------------------------- * Function: H5O__cache_chk_clear * * Purpose: Clear all dirty bits associated with this cache entry. * * This is ncessary as the object header cache client maintains * its own dirty bits on individual messages. These dirty bits * used to be cleared by the old V2 metadata cache flush callback, * but now the metadata cache must clear them explicitly, as * the serialize callback does not imply that the data has been * written to disk. * * This callback is also necessary for the parallel case. * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 9/22/14 * *------------------------------------------------------------------------- */ static herr_t #ifdef H5_HAVE_PARALLEL H5O__cache_chk_clear(const H5F_t *f, void *_thing, hbool_t about_to_destroy) #else H5O__cache_chk_clear(const H5F_t H5_ATTR_UNUSED *f, void *_thing, hbool_t H5_ATTR_UNUSED about_to_destroy) #endif /* H5_HAVE_PARALLEL */ { H5O_chunk_proxy_t *chk_proxy = (H5O_chunk_proxy_t *)_thing; /* Object header chunk to reset */ H5O_t *oh; /* Object header for chunk */ unsigned u; /* Local index variable */ herr_t ret_value = SUCCEED; /* Return value */ #ifdef H5_HAVE_PARALLEL FUNC_ENTER_STATIC #else FUNC_ENTER_STATIC_NOERR #endif /* H5_HAVE_PARALLEL */ /* Check arguments */ HDassert(chk_proxy); HDassert(chk_proxy->cache_info.magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); HDassert(chk_proxy->cache_info.type == H5AC_OHDR_CHK); oh = chk_proxy->oh; HDassert(oh); HDassert(oh->cache_info.magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); HDassert(oh->cache_info.type == H5AC_OHDR); #ifdef H5_HAVE_PARALLEL if((chk_proxy->oh->cache_info.is_dirty) && (!about_to_destroy)) if(H5O__chunk_serialize(f, chk_proxy->oh, chk_proxy->chunkno) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTSERIALIZE, FAIL, "unable to serialize object header chunk") #endif /* H5_HAVE_PARALLEL */ /* Mark messages in chunk as clean */ for(u = 0; u < chk_proxy->oh->nmesgs; u++) if(chk_proxy->oh->mesg[u].chunkno == chk_proxy->chunkno) chk_proxy->oh->mesg[u].dirty = FALSE; #ifdef H5_HAVE_PARALLEL done: #endif /* H5_HAVE_PARALLEL */ FUNC_LEAVE_NOAPI(ret_value) } /* end H5O__cache_chk_clear() */ /*------------------------------------------------------------------------- * Function: H5O__add_cont_msg * * Purpose: Add information from a continuation message to the list of * continuation messages in the object header * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: Quincey Koziol * koziol@hdfgroup.org * July 12, 2008 * *------------------------------------------------------------------------- */ static herr_t H5O__add_cont_msg(H5O_cont_msgs_t *cont_msg_info, const H5O_cont_t *cont) { size_t contno; /* Continuation message index */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_STATIC /* Check arguments */ HDassert(cont_msg_info); HDassert(cont); /* Increase chunk array size, if necessary */ if(cont_msg_info->nmsgs >= cont_msg_info->alloc_nmsgs) { size_t na = MAX(H5O_NCHUNKS, cont_msg_info->alloc_nmsgs * 2); /* Double # of messages allocated */ H5O_cont_t *x; if(NULL == (x = H5FL_SEQ_REALLOC(H5O_cont_t, cont_msg_info->msgs, na))) HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, FAIL, "memory allocation failed") cont_msg_info->alloc_nmsgs = na; cont_msg_info->msgs = x; } /* end if */ /* Init the continuation message info */ contno = cont_msg_info->nmsgs++; cont_msg_info->msgs[contno].addr = cont->addr; cont_msg_info->msgs[contno].size = cont->size; cont_msg_info->msgs[contno].chunkno = cont->chunkno; done: FUNC_LEAVE_NOAPI(ret_value) } /* H5O__add_cont_msg() */ /*------------------------------------------------------------------------- * Function: H5O__chunk_deserialize * * Purpose: Deserialize a chunk for an object header * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: Quincey Koziol * koziol@hdfgroup.org * July 12, 2008 * *------------------------------------------------------------------------- */ static herr_t H5O__chunk_deserialize(H5O_t *oh, haddr_t addr, size_t len, const uint8_t *image, H5O_common_cache_ud_t *udata, hbool_t *dirty) { const uint8_t *chunk_image; /* Pointer into buffer to decode */ uint8_t *eom_ptr; /* Pointer to end of messages for a chunk */ size_t curmesg; /* Current message being decoded in object header */ unsigned merged_null_msgs = 0; /* Number of null messages merged together */ unsigned chunkno; /* Current chunk's index */ #ifndef NDEBUG unsigned nullcnt; /* Count of null messages (for sanity checking gaps in chunks) */ #endif /* NDEBUG */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_STATIC /* Check arguments */ HDassert(oh); HDassert(H5F_addr_defined(addr)); HDassert(image); HDassert(udata->f); HDassert(udata->cont_msg_info); /* Increase chunk array size, if necessary */ if(oh->nchunks >= oh->alloc_nchunks) { size_t na = MAX(H5O_NCHUNKS, oh->alloc_nchunks * 2); /* Double # of chunks allocated */ H5O_chunk_t *x; if(NULL == (x = H5FL_SEQ_REALLOC(H5O_chunk_t, oh->chunk, na))) HGOTO_ERROR(H5E_OHDR, H5E_CANTALLOC, FAIL, "memory allocation failed") oh->alloc_nchunks = na; oh->chunk = x; } /* end if */ /* Init the chunk data info */ chunkno = (unsigned)oh->nchunks++; oh->chunk[chunkno].gap = 0; if(chunkno == 0) { /* First chunk's 'image' includes room for the object header prefix */ oh->chunk[0].addr = addr; oh->chunk[0].size = len + (size_t)H5O_SIZEOF_HDR(oh); } /* end if */ else { oh->chunk[chunkno].addr = addr; oh->chunk[chunkno].size = len; } /* end else */ if(NULL == (oh->chunk[chunkno].image = H5FL_BLK_MALLOC(chunk_image, oh->chunk[chunkno].size))) HGOTO_ERROR(H5E_OHDR, H5E_CANTALLOC, FAIL, "memory allocation failed") /* Copy disk image into chunk's image */ HDmemcpy(oh->chunk[chunkno].image, image, oh->chunk[chunkno].size); /* Point into chunk image to decode */ chunk_image = oh->chunk[chunkno].image; /* Handle chunk 0 as special case */ if(chunkno == 0) /* Skip over [already decoded] prefix */ chunk_image += (size_t)(H5O_SIZEOF_HDR(oh) - H5O_SIZEOF_CHKSUM_OH(oh)); /* Check for magic # on chunks > 0 in later versions of the format */ else if(chunkno > 0 && oh->version > H5O_VERSION_1) { /* Magic number */ if(HDmemcmp(chunk_image, H5O_CHK_MAGIC, (size_t)H5_SIZEOF_MAGIC)) HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "wrong object header chunk signature") chunk_image += H5_SIZEOF_MAGIC; } /* end if */ /* Save # of messages already inspected */ curmesg = oh->nmesgs; /* Decode messages from this chunk */ eom_ptr = oh->chunk[chunkno].image + (oh->chunk[chunkno].size - H5O_SIZEOF_CHKSUM_OH(oh)); #ifndef NDEBUG nullcnt = 0; #endif /* NDEBUG */ while(chunk_image < eom_ptr) { size_t mesgno; /* Current message to operate on */ size_t mesg_size; /* Size of message read in */ unsigned id; /* ID (type) of current message */ uint8_t flags; /* Flags for current message */ H5O_msg_crt_idx_t crt_idx = 0; /* Creation index for current message */ /* Decode message prefix info */ /* Version # */ if(oh->version == H5O_VERSION_1) UINT16DECODE(chunk_image, id) else id = *chunk_image++; /* Message size */ UINT16DECODE(chunk_image, mesg_size); HDassert(mesg_size == H5O_ALIGN_OH(oh, mesg_size)); /* Message flags */ flags = *chunk_image++; if(flags & ~H5O_MSG_FLAG_BITS) HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unknown flag for message") if((flags & H5O_MSG_FLAG_SHARED) && (flags & H5O_MSG_FLAG_DONTSHARE)) HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "bad flag combination for message") if((flags & H5O_MSG_FLAG_WAS_UNKNOWN) && (flags & H5O_MSG_FLAG_FAIL_IF_UNKNOWN_AND_OPEN_FOR_WRITE)) HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "bad flag combination for message") if((flags & H5O_MSG_FLAG_WAS_UNKNOWN) && !(flags & H5O_MSG_FLAG_MARK_IF_UNKNOWN)) HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "bad flag combination for message") if((flags & H5O_MSG_FLAG_SHAREABLE) && H5O_msg_class_g[id] && !(H5O_msg_class_g[id]->share_flags & H5O_SHARE_IS_SHARABLE)) HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "message of unsharable class flagged as sharable") /* Reserved bytes/creation index */ if(oh->version == H5O_VERSION_1) chunk_image += 3; /*reserved*/ else { /* Only decode creation index if they are being tracked */ if(oh->flags & H5O_HDR_ATTR_CRT_ORDER_TRACKED) UINT16DECODE(chunk_image, crt_idx); } /* end else */ /* Try to detect invalidly formatted object header message that * extends past end of chunk. */ if(chunk_image + mesg_size > eom_ptr) HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "corrupt object header") #ifndef NDEBUG /* Increment count of null messages */ if(H5O_NULL_ID == id) nullcnt++; #endif /* NDEBUG */ /* Check for combining two adjacent 'null' messages */ if((udata->file_intent & H5F_ACC_RDWR) && H5O_NULL_ID == id && oh->nmesgs > 0 && H5O_NULL_ID == oh->mesg[oh->nmesgs - 1].type->id && oh->mesg[oh->nmesgs - 1].chunkno == chunkno) { /* Combine adjacent null messages */ mesgno = oh->nmesgs - 1; oh->mesg[mesgno].raw_size += (size_t)H5O_SIZEOF_MSGHDR_OH(oh) + mesg_size; oh->mesg[mesgno].dirty = TRUE; merged_null_msgs++; udata->merged_null_msgs++; } /* end if */ else { /* Check if we need to extend message table to hold the new message */ if(oh->nmesgs >= oh->alloc_nmesgs) if(H5O_alloc_msgs(oh, (size_t)1) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTALLOC, FAIL, "can't allocate more space for messages") /* Get index for message */ mesgno = oh->nmesgs++; /* Initialize information about message */ oh->mesg[mesgno].dirty = FALSE; oh->mesg[mesgno].flags = flags; oh->mesg[mesgno].crt_idx = crt_idx; oh->mesg[mesgno].native = NULL; oh->mesg[mesgno].raw = (uint8_t *)chunk_image; /* Casting away const OK - QAK */ oh->mesg[mesgno].raw_size = mesg_size; oh->mesg[mesgno].chunkno = chunkno; /* Point unknown messages at 'unknown' message class */ /* (Usually from future versions of the library) */ if(id >= H5O_UNKNOWN_ID || #ifdef H5O_ENABLE_BOGUS id == H5O_BOGUS_VALID_ID || #endif NULL == H5O_msg_class_g[id]) { H5O_unknown_t *unknown; /* Pointer to "unknown" message info */ /* Allocate "unknown" message info */ if(NULL == (unknown = H5FL_MALLOC(H5O_unknown_t))) HGOTO_ERROR(H5E_OHDR, H5E_CANTALLOC, FAIL, "memory allocation failed") /* Save the original message type ID */ *unknown = id; /* Save 'native' form of unknown message */ oh->mesg[mesgno].native = unknown; /* Set message to "unknown" class */ oh->mesg[mesgno].type = H5O_msg_class_g[H5O_UNKNOWN_ID]; /* Check for "fail if unknown" message flags */ if(((udata->file_intent & H5F_ACC_RDWR) && (flags & H5O_MSG_FLAG_FAIL_IF_UNKNOWN_AND_OPEN_FOR_WRITE)) || (flags & H5O_MSG_FLAG_FAIL_IF_UNKNOWN_ALWAYS)) HGOTO_ERROR(H5E_OHDR, H5E_BADMESG, FAIL, "unknown message with 'fail if unknown' flag found") /* Check for "mark if unknown" message flag, etc. */ else if((flags & H5O_MSG_FLAG_MARK_IF_UNKNOWN) && !(flags & H5O_MSG_FLAG_WAS_UNKNOWN) && (udata->file_intent & H5F_ACC_RDWR)) { /* Mark the message as "unknown" */ /* This is a bit aggressive, since the application may * never change anything about the object (metadata or * raw data), but we can sort out the finer details * when/if we start using the flag - QAK */ /* Also, it's possible that this functionality may not * get invoked if the object header is brought into * the metadata cache in some other "weird" way, like * using H5Ocopy() - QAK */ oh->mesg[mesgno].flags |= H5O_MSG_FLAG_WAS_UNKNOWN; /* Mark the message and chunk as dirty */ oh->mesg[mesgno].dirty = TRUE; udata->mesgs_modified = TRUE; *dirty = TRUE; } /* end if */ } /* end if */ else /* Set message class for "known" messages */ oh->mesg[mesgno].type = H5O_msg_class_g[id]; } /* end else */ /* Advance decode pointer past message */ chunk_image += mesg_size; /* Check for 'gap' at end of chunk */ if((eom_ptr - chunk_image) > 0 && (eom_ptr - chunk_image) < H5O_SIZEOF_MSGHDR_OH(oh)) { /* Gaps can only occur in later versions of the format */ HDassert(oh->version > H5O_VERSION_1); /* Gaps should only occur in chunks with no null messages */ HDassert(nullcnt == 0); /* Set gap information for chunk */ oh->chunk[chunkno].gap = (size_t)(eom_ptr - chunk_image); /* Increment location in chunk */ chunk_image += oh->chunk[chunkno].gap; } /* end if */ } /* end while */ /* Check for correct checksum on chunks, in later versions of the format */ if(oh->version > H5O_VERSION_1) { uint32_t stored_chksum; /* Checksum from file */ uint32_t computed_chksum; /* Checksum computed in memory */ /* Metadata checksum */ UINT32DECODE(chunk_image, stored_chksum); /* Compute checksum on chunk */ computed_chksum = H5_checksum_metadata(oh->chunk[chunkno].image, (oh->chunk[chunkno].size - H5O_SIZEOF_CHKSUM), 0); /* Verify checksum */ if(stored_chksum != computed_chksum) HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, FAIL, "incorrect metadata checksum for object header chunk") } /* end if */ /* Sanity check */ HDassert(chunk_image == oh->chunk[chunkno].image + oh->chunk[chunkno].size); /* Do some inspection/interpretation of new messages from this chunk */ /* (detect continuation messages, ref. count messages, etc.) */ while(curmesg < oh->nmesgs) { /* Check if next message to examine is a continuation message */ if(H5O_CONT_ID == oh->mesg[curmesg].type->id) { H5O_cont_t *cont; unsigned ioflags = 0; /* Flags for decode routine */ /* Decode continuation message */ cont = (H5O_cont_t *)(H5O_MSG_CONT->decode)(udata->f, udata->dxpl_id, NULL, 0, &ioflags, oh->mesg[curmesg].raw); H5_CHECKED_ASSIGN(cont->chunkno, unsigned, udata->cont_msg_info->nmsgs + 1, size_t); /* the next continuation message/chunk */ /* Save 'native' form of continuation message */ oh->mesg[curmesg].native = cont; /* Add to continuation messages left to interpret */ if(H5O__add_cont_msg(udata->cont_msg_info, cont) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't add continuation message") /* Mark the message & chunk as dirty if the message was changed by decoding */ if((ioflags & H5O_DECODEIO_DIRTY) && (udata->file_intent & H5F_ACC_RDWR)) { oh->mesg[curmesg].dirty = TRUE; udata->mesgs_modified = TRUE; *dirty = TRUE; } /* end if */ } /* end if */ /* Check if next message to examine is a ref. count message */ else if(H5O_REFCOUNT_ID == oh->mesg[curmesg].type->id) { H5O_refcount_t *refcount; unsigned ioflags = 0; /* Flags for decode routine */ /* Decode ref. count message */ HDassert(oh->version > H5O_VERSION_1); refcount = (H5O_refcount_t *)(H5O_MSG_REFCOUNT->decode)(udata->f, udata->dxpl_id, NULL, 0, &ioflags, oh->mesg[curmesg].raw); /* Save 'native' form of ref. count message */ oh->mesg[curmesg].native = refcount; /* Set object header values */ oh->has_refcount_msg = TRUE; oh->nlink = *refcount; /* Mark the message & chunk as dirty if the message was changed by decoding */ if((ioflags & H5O_DECODEIO_DIRTY) && (udata->file_intent & H5F_ACC_RDWR)) { oh->mesg[curmesg].dirty = TRUE; udata->mesgs_modified = TRUE; *dirty = TRUE; } /* end if */ } /* end if */ /* Check if next message to examine is a link message */ else if(H5O_LINK_ID == oh->mesg[curmesg].type->id) { /* Increment the count of link messages */ oh->link_msgs_seen++; } /* end if */ /* Check if next message to examine is an attribute message */ else if(H5O_ATTR_ID == oh->mesg[curmesg].type->id) { /* Increment the count of attribute messages */ oh->attr_msgs_seen++; } /* end if */ /* Advance to next message */ curmesg++; } /* end while */ /* Mark the chunk dirty if we've merged null messages */ if(merged_null_msgs) { udata->mesgs_modified = TRUE; *dirty = TRUE; } /* end if */ done: FUNC_LEAVE_NOAPI(ret_value) } /* H5O__chunk_deserialize() */ /*------------------------------------------------------------------------- * Function: H5O__chunk_serialize * * Purpose: Serialize a chunk for an object header * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: Quincey Koziol * koziol@hdfgroup.org * July 12, 2008 * *------------------------------------------------------------------------- */ static herr_t H5O__chunk_serialize(const H5F_t *f, H5O_t *oh, unsigned chunkno) { H5O_mesg_t *curr_msg; /* Pointer to current message being operated on */ unsigned u; /* Local index variable */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_STATIC /* Check arguments */ HDassert(f); HDassert(oh); /* Encode any dirty messages in this chunk */ for(u = 0, curr_msg = &oh->mesg[0]; u < oh->nmesgs; u++, curr_msg++) if(curr_msg->dirty && curr_msg->chunkno == chunkno) /* Casting away const OK -QAK */ if(H5O_msg_flush((H5F_t *)f, oh, curr_msg) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTENCODE, FAIL, "unable to encode object header message") /* Sanity checks */ if(oh->version > H5O_VERSION_1) /* Make certain the magic # is present */ HDassert(!HDmemcmp(oh->chunk[chunkno].image, (chunkno == 0 ? H5O_HDR_MAGIC : H5O_CHK_MAGIC), H5_SIZEOF_MAGIC)); else /* Gaps should never occur in version 1 of the format */ HDassert(oh->chunk[chunkno].gap == 0); /* Extra work, for later versions of the format */ if(oh->version > H5O_VERSION_1) { uint32_t metadata_chksum; /* Computed metadata checksum value */ uint8_t *chunk_image; /* Pointer into object header chunk */ /* Check for gap in chunk & zero it out */ if(oh->chunk[chunkno].gap) HDmemset((oh->chunk[chunkno].image + oh->chunk[chunkno].size) - (H5O_SIZEOF_CHKSUM + oh->chunk[chunkno].gap), 0, oh->chunk[chunkno].gap); /* Compute metadata checksum */ metadata_chksum = H5_checksum_metadata(oh->chunk[chunkno].image, (oh->chunk[chunkno].size - H5O_SIZEOF_CHKSUM), 0); /* Metadata checksum */ chunk_image = oh->chunk[chunkno].image + (oh->chunk[chunkno].size - H5O_SIZEOF_CHKSUM); UINT32ENCODE(chunk_image, metadata_chksum); } /* end if */ done: FUNC_LEAVE_NOAPI(ret_value) } /* H5O__chunk_serialize() */ /*------------------------------------------------------------------------- * Function: H5O__chunk_proxy_dest * * Purpose: Destroy a chunk proxy object * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: Quincey Koziol * koziol@hdfgroup.org * July 13, 2008 * *------------------------------------------------------------------------- */ static herr_t H5O__chunk_proxy_dest(H5O_chunk_proxy_t *chk_proxy) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_STATIC /* Check arguments */ HDassert(chk_proxy); /* Decrement reference count of object header */ if(chk_proxy->oh && H5O_dec_rc(chk_proxy->oh) < 0) HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "can't decrement reference count on object header") /* Release the chunk proxy object */ chk_proxy = H5FL_FREE(H5O_chunk_proxy_t, chk_proxy); done: FUNC_LEAVE_NOAPI(ret_value) } /* H5O__chunk_proxy_dest() */