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zfs/zfs_config.h.in

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Add initial autoconf products Add the initial products from autogen.sh. These products will be updated incrementally after this point as development occurs. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2010-08-26 19:28:14 +00:00
/* zfs_config.h.in. Generated from configure.ac by autoheader. */
/* invalidate_bdev() wants 1 arg */
#undef HAVE_1ARG_INVALIDATE_BDEV
/* bio_end_io_t wants 2 args */
#undef HAVE_2ARGS_BIO_END_IO_T
/* struct block_device_operations use bdevs */
#undef HAVE_BDEV_BLOCK_DEVICE_OPERATIONS
/* bdev_logical_block_size() is available */
#undef HAVE_BDEV_LOGICAL_BLOCK_SIZE
/* bio_empy_barrier() is defined */
#undef HAVE_BIO_EMPTY_BARRIER
Linux 2.6.36 compat, use REQ_FAILFAST_MASK As of linux-2.6.36 the BIO_RW_FAILFAST and REQ_FAILFAST flags have been unified under the REQ_* names. These flags always had to be kept in-sync so this is a nice step forward, unfortunately it means we need to be careful to only use the new unified flags when the BIO_RW_* flags are not defined. Additional autoconf checks were added for this and if it is ever unclear which method to use no flags are set. This is safe but may result in longer delays before a disk is failed. Perferred interface for setting FAILFAST on a bio: 2.6.12-2.6.27: BIO_RW_FAILFAST 2.6.28-2.6.35: BIO_RW_FAILFAST_{DEV|TRANSPORT|DRIVER} 2.6.36-2.6.xx: REQ_FAILFAST_{DEV|TRANSPORT|DRIVER}
2010-11-10 22:40:38 +00:00
/* REQ_FAILFAST_MASK is defined */
#undef HAVE_BIO_REQ_FAILFAST_MASK
/* BIO_RW_FAILFAST is defined */
Add FAILFAST support ZFS works best when it is notified as soon as possible when a device failure occurs. This allows it to immediately start any recovery actions which may be needed. In theory Linux supports a flag which can be set on bio's called FAILFAST which provides this quick notification by disabling the retry logic in the lower scsi layers. That's the theory at least. In practice is turns out that while the flag exists you oddly have to set it with the BIO_RW_AHEAD flag. And even when it's set it you may get retries in the low level drivers decides that's the right behavior, or if you don't get the right error codes reported to the scsi midlayer. Unfortunately, without additional kernels patchs there's not much which can be done to improve this. Basically, this just means that it may take 2-3 minutes before a ZFS is notified properly that a device has failed. This can be improved and I suspect I'll be submitting patches upstream to handle this.
2010-10-01 17:57:56 +00:00
#undef HAVE_BIO_RW_FAILFAST
Linux 2.6.36 compat, use REQ_FAILFAST_MASK As of linux-2.6.36 the BIO_RW_FAILFAST and REQ_FAILFAST flags have been unified under the REQ_* names. These flags always had to be kept in-sync so this is a nice step forward, unfortunately it means we need to be careful to only use the new unified flags when the BIO_RW_* flags are not defined. Additional autoconf checks were added for this and if it is ever unclear which method to use no flags are set. This is safe but may result in longer delays before a disk is failed. Perferred interface for setting FAILFAST on a bio: 2.6.12-2.6.27: BIO_RW_FAILFAST 2.6.28-2.6.35: BIO_RW_FAILFAST_{DEV|TRANSPORT|DRIVER} 2.6.36-2.6.xx: REQ_FAILFAST_{DEV|TRANSPORT|DRIVER}
2010-11-10 22:40:38 +00:00
/* BIO_RW_FAILFAST_* are defined */
#undef HAVE_BIO_RW_FAILFAST_DTD
Linux 2.6.36 compat, synchronous bio flag The name of the flag used to mark a bio as synchronous has changed again in the 2.6.36 kernel due to the unification of the BIO_RW_* and REQ_* flags. The new flag is called REQ_SYNC. To simplify checking this flag I have introduced the vdev_disk_dio_is_sync() helper function. Based on the results of several new autoconf tests it uses the correct mask to check for a synchronous bio. Preferred interface for flagging a synchronous bio: 2.6.12-2.6.29: BIO_RW_SYNC 2.6.30-2.6.35: BIO_RW_SYNCIO 2.6.36-2.6.xx: REQ_SYNC
2010-11-10 23:49:40 +00:00
/* BIO_RW_SYNC is defined */
#undef HAVE_BIO_RW_SYNC
Add initial autoconf products Add the initial products from autogen.sh. These products will be updated incrementally after this point as development occurs. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2010-08-26 19:28:14 +00:00
/* BIO_RW_SYNCIO is defined */
#undef HAVE_BIO_RW_SYNCIO
/* blk_end_request() is available */
#undef HAVE_BLK_END_REQUEST
/* blk_end_request() is GPL-only */
#undef HAVE_BLK_END_REQUEST_GPL_ONLY
/* blk_fetch_request() is available */
#undef HAVE_BLK_FETCH_REQUEST
/* blk_requeue_request() is available */
#undef HAVE_BLK_REQUEUE_REQUEST
/* blk_rq_bytes() is available */
#undef HAVE_BLK_RQ_BYTES
/* blk_rq_bytes() is GPL-only */
#undef HAVE_BLK_RQ_BYTES_GPL_ONLY
/* blk_rq_pos() is available */
#undef HAVE_BLK_RQ_POS
/* blk_rq_sectors() is available */
#undef HAVE_BLK_RQ_SECTORS
/* Define to 1 if you have the <dlfcn.h> header file. */
#undef HAVE_DLFCN_H
/* kernel defines fmode_t */
#undef HAVE_FMODE_T
/* blk_disk_ro() is available */
#undef HAVE_GET_DISK_RO
/* Define to 1 if licensed under the GPL */
#undef HAVE_GPL_ONLY_SYMBOLS
/* Define to 1 if you have the <inttypes.h> header file. */
#undef HAVE_INTTYPES_H
/* result=stropts.h Define to 1 if ioctl() defined in <stropts.h> */
#undef HAVE_IOCTL_IN_STROPTS_H
/* Define to 1 if ioctl() defined in <sys/ioctl.h> */
#undef HAVE_IOCTL_IN_SYS_IOCTL_H
/* Define to 1 if ioctl() defined in <unistd.h> */
#undef HAVE_IOCTL_IN_UNISTD_H
/* kernel defines KOBJ_NAME_LEN */
#undef HAVE_KOBJ_NAME_LEN
/* Define if you have libblkid */
#undef HAVE_LIBBLKID
Autoconf selinux support If libselinux is detected on your system at configure time link against it. This allows us to use a library call to detect if selinux is enabled and if it is to pass the mount option: "context=\"system_u:object_r:file_t:s0" For now this is required because none of the existing selinux policies are aware of the zfs filesystem type. Because of this they do not properly enable xattr based labeling even though zfs supports all of the required hooks. Until distro's add zfs as a known xattr friendly fs type we must use mntpoint labeling. Alternately, end users could modify their existing selinux policy with a little guidance.
2010-12-16 22:26:08 +00:00
/* Define if you have selinux */
#undef HAVE_LIBSELINUX
Add initial autoconf products Add the initial products from autogen.sh. These products will be updated incrementally after this point as development occurs. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2010-08-26 19:28:14 +00:00
/* Define if you have libuuid */
#undef HAVE_LIBUUID
/* Define to 1 if you have the `z' library (-lz). */
#undef HAVE_LIBZ
/* Define to 1 if you have the <memory.h> header file. */
#undef HAVE_MEMORY_H
/* open_bdev_exclusive() is available */
#undef HAVE_OPEN_BDEV_EXCLUSIVE
Linux 2.6.36 compat, synchronous bio flag The name of the flag used to mark a bio as synchronous has changed again in the 2.6.36 kernel due to the unification of the BIO_RW_* and REQ_* flags. The new flag is called REQ_SYNC. To simplify checking this flag I have introduced the vdev_disk_dio_is_sync() helper function. Based on the results of several new autoconf tests it uses the correct mask to check for a synchronous bio. Preferred interface for flagging a synchronous bio: 2.6.12-2.6.29: BIO_RW_SYNC 2.6.30-2.6.35: BIO_RW_SYNCIO 2.6.36-2.6.xx: REQ_SYNC
2010-11-10 23:49:40 +00:00
/* REQ_SYNC is defined */
#undef HAVE_REQ_SYNC
Add initial autoconf products Add the initial products from autogen.sh. These products will be updated incrementally after this point as development occurs. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2010-08-26 19:28:14 +00:00
/* rq_for_each_segment() is available */
#undef HAVE_RQ_FOR_EACH_SEGMENT
/* rq_is_sync() is available */
#undef HAVE_RQ_IS_SYNC
/* Define to 1 if you have the <stdint.h> header file. */
#undef HAVE_STDINT_H
/* Define to 1 if you have the <stdlib.h> header file. */
#undef HAVE_STDLIB_H
/* Define to 1 if you have the <strings.h> header file. */
#undef HAVE_STRINGS_H
/* Define to 1 if you have the <string.h> header file. */
#undef HAVE_STRING_H
/* Define to 1 if you have the <sys/stat.h> header file. */
#undef HAVE_SYS_STAT_H
/* Define to 1 if you have the <sys/types.h> header file. */
#undef HAVE_SYS_TYPES_H
/* Define to 1 if you have the <unistd.h> header file. */
#undef HAVE_UNISTD_H
/* Define if you have zlib */
#undef HAVE_ZLIB
/* Define to the sub-directory in which libtool stores uninstalled libraries.
*/
#undef LT_OBJDIR
/* Define to 1 if NPTL threading implementation includes guard area in stack
allocation */
#undef NPTL_GUARD_WITHIN_STACK
/* Name of package */
#undef PACKAGE
/* Define to the address where bug reports for this package should be sent. */
#undef PACKAGE_BUGREPORT
/* Define to the full name of this package. */
#undef PACKAGE_NAME
/* Define to the full name and version of this package. */
#undef PACKAGE_STRING
/* Define to the one symbol short name of this package. */
#undef PACKAGE_TARNAME
/* Define to the version of this package. */
#undef PACKAGE_VERSION
/* Define to 1 if you have the ANSI C header files. */
#undef STDC_HEADERS
/* Version number of package */
#undef VERSION
/* Define the project alias string. */
#undef ZFS_META_ALIAS
/* Define the project author. */
#undef ZFS_META_AUTHOR
/* Define the project release date. */
#undef ZFS_META_DATA
/* Define the project license. */
#undef ZFS_META_LICENSE
/* Define the libtool library 'age' version information. */
#undef ZFS_META_LT_AGE
/* Define the libtool library 'current' version information. */
#undef ZFS_META_LT_CURRENT
/* Define the libtool library 'revision' version information. */
#undef ZFS_META_LT_REVISION
/* Define the project name. */
#undef ZFS_META_NAME
/* Define the project release. */
#undef ZFS_META_RELEASE
/* Define the project version. */
#undef ZFS_META_VERSION
#undef PACKAGE
#undef PACKAGE_BUGREPORT
#undef PACKAGE_NAME
#undef PACKAGE_STRING
#undef PACKAGE_TARNAME
#undef PACKAGE_VERSION
#undef STDC_HEADERS
#undef VERSION