diff options
Diffstat (limited to 'src/H5FDlog.c')
| -rw-r--r-- | src/H5FDlog.c | 48 |
1 files changed, 40 insertions, 8 deletions
diff --git a/src/H5FDlog.c b/src/H5FDlog.c index 78b7742..045662a 100644 --- a/src/H5FDlog.c +++ b/src/H5FDlog.c @@ -40,6 +40,9 @@ /* The driver identification number, initialized at runtime */ static hid_t H5FD_LOG_g = 0; +/* Whether to ignore file locks when disabled (env var value) */ +static htri_t ignore_disabled_file_locks_s = FAIL; + /* Driver-specific file access properties */ typedef struct H5FD_log_fapl_t { char *logfile; /* Allocated log file name */ @@ -80,6 +83,7 @@ typedef struct H5FD_log_t { haddr_t eof; /* end of file; current file size */ haddr_t pos; /* current file I/O position */ H5FD_file_op_t op; /* last operation */ + hbool_t ignore_disabled_file_locks; char filename[H5FD_MAX_FILENAME_LEN]; /* Copy of file name from open operation */ #ifndef H5_HAVE_WIN32_API /* On most systems the combination of device and i-node number uniquely @@ -234,10 +238,20 @@ H5FL_DEFINE_STATIC(H5FD_log_t); static herr_t H5FD__init_package(void) { + char *lock_env_var = NULL; /* Environment variable pointer */ herr_t ret_value = SUCCEED; FUNC_ENTER_STATIC + /* Check the use disabled file locks environment variable */ + lock_env_var = HDgetenv("HDF5_USE_FILE_LOCKING"); + if(lock_env_var && !HDstrcmp(lock_env_var, "BEST-EFFORT")) + ignore_disabled_file_locks_s = TRUE; /* Override: Ignore disabled locks */ + else if(lock_env_var && (!HDstrcmp(lock_env_var, "TRUE") || !HDstrcmp(lock_env_var, "1"))) + ignore_disabled_file_locks_s = FALSE; /* Override: Don't ignore disabled locks */ + else + ignore_disabled_file_locks_s = FAIL; /* Environment variable not set, or not set correctly */ + if(H5FD_log_init() < 0) HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "unable to initialize log VFD") @@ -625,6 +639,16 @@ H5FD_log_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr) } /* end if */ } /* end if */ + /* Check the file locking flags in the fapl */ + if(ignore_disabled_file_locks_s != FAIL) + /* The environment variable was set, so use that preferentially */ + file->ignore_disabled_file_locks = ignore_disabled_file_locks_s; + else { + /* Use the value in the property list */ + if(H5P_get(plist, H5F_ACS_IGNORE_DISABLED_FILE_LOCKS_NAME, &file->ignore_disabled_file_locks) < 0) + HGOTO_ERROR(H5E_VFL, H5E_CANTGET, NULL, "can't get ignore disabled file locks property") + } + /* Check for non-default FAPL */ if(H5P_FILE_ACCESS_DEFAULT != fapl_id) { /* This step is for h5repart tool only. If user wants to change file driver from @@ -1671,11 +1695,15 @@ H5FD_log_lock(H5FD_t *_file, hbool_t rw) /* Place a non-blocking lock on the file */ if(HDflock(file->fd, lock_flags | LOCK_NB) < 0) { - if(ENOSYS == errno) - HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, FAIL, "file locking disabled on this file system (use HDF5_USE_FILE_LOCKING environment variable to override)") + if(file->ignore_disabled_file_locks && ENOSYS == errno) { + /* When errno is set to ENOSYS, the file system does not support + * locking, so ignore it. + */ + errno = 0; + } else - HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, FAIL, "unable to lock file") - } /* end if */ + HSYS_GOTO_ERROR(H5E_VFL, H5E_CANTLOCKFILE, FAIL, "unable to lock file") + } done: FUNC_LEAVE_NOAPI(ret_value) @@ -1704,11 +1732,15 @@ H5FD_log_unlock(H5FD_t *_file) HDassert(file); if(HDflock(file->fd, LOCK_UN) < 0) { - if(ENOSYS == errno) - HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, FAIL, "file locking disabled on this file system (use HDF5_USE_FILE_LOCKING environment variable to override)") + if(file->ignore_disabled_file_locks && ENOSYS == errno) { + /* When errno is set to ENOSYS, the file system does not support + * locking, so ignore it. + */ + errno = 0; + } else - HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, FAIL, "unable to unlock file") - } /* end if */ + HSYS_GOTO_ERROR(H5E_VFL, H5E_CANTUNLOCKFILE, FAIL, "unable to unlock file") + } done: FUNC_LEAVE_NOAPI(ret_value) |