diff options
Diffstat (limited to 'src/H5FDint.c')
| -rw-r--r-- | src/H5FDint.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/H5FDint.c b/src/H5FDint.c index 602559d..28dc3a1 100644 --- a/src/H5FDint.c +++ b/src/H5FDint.c @@ -233,6 +233,24 @@ H5FD_read(H5FD_t *file, H5FD_mem_t type, haddr_t addr, size_t size, void *buf /* HGOTO_DONE(SUCCEED) #endif /* H5_HAVE_PARALLEL */ + /* If the file is open for SWMR read access, allow access to data past + * the end of the allocated space (the 'eoa'). This is done because the + * eoa stored in the file's superblock might be out of sync with the + * objects being written within the file by the application performing + * SWMR write operations. + */ + if (!(file->access_flags & H5F_ACC_SWMR_READ)) { + haddr_t eoa; + + if (HADDR_UNDEF == (eoa = (file->cls->get_eoa)(file, type))) + HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "driver get_eoa request failed") + + if ((addr + file->base_addr + size) > eoa) + HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow, addr = %llu, size = %llu, eoa = %llu", + (unsigned long long)(addr + file->base_addr), (unsigned long long)size, + (unsigned long long)eoa) + } + /* Dispatch to driver */ if ((file->cls->read)(file, type, dxpl_id, addr + file->base_addr, size, buf) < 0) HGOTO_ERROR(H5E_VFL, H5E_READERROR, FAIL, "driver read request failed") |