src/config, branch zfs-0.6.2

Linux 3.11 compat: fops->iterate()

2013-08-15T23:19:07Z

Commit torvalds/linux@2233f31aade393641f0eaed43a71110e629bb900 replaced ->readdir() with ->iterate() in struct file_operations. All filesystems must now use the new ->iterate method. To handle this the code was reworked to use the new ->iterate interface. Care was taken to keep the majority of changes confined to the ZPL layer which is already Linux specific. However, minor changes were required to the common zfs_readdir() function. Compatibility with older kernels was accomplished by adding versions of the trivial dir_emit* helper functions. Also the various *_readdir() functions were reworked in to wrappers which create a dir_context structure to pass to the new *_iterate() functions. Unfortunately, the new dir_emit* functions prevent us from passing a private pointer to the filldir function. The xattr directory code leveraged this ability through zfs_readdir() to generate the list of xattr names. Since we can no longer use zfs_readdir() a simplified zpl_xattr_readdir() function was added to perform the same task. Signed-off-by: Richard Yao Signed-off-by: Brian Behlendorf Closes #1653 Issue #1591

Fix arc_adapt() spinning in iterate_supers_type()

2013-07-17T16:28:06Z

The iterate_supers_type() function which was introduced in the 3.0 kernel was supposed to provide a safe way to call an arbitrary function on all super blocks of a specific type. Unfortunately, because a list_head was used a bug was introduced which made it possible for iterate_supers_type() to get stuck spinning on a super block which was just deactivated. This can occur because when the list head is removed from the fs_supers list it is reinitialized to point to itself. If the iterate_supers_type() function happened to be processing the removed list_head it will get stuck spinning on that list_head. The bug was fixed in the 3.3 kernel by converting the list_head to an hlist_node. However, to resolve the issue for existing 3.0 - 3.2 kernels we detect when a list_head is used. Then to prevent the spinning from occurring the .next pointer is set to the fs_supers list_head which ensures the iterate_supers_type() function will always terminate. Signed-off-by: Brian Behlendorf Closes #1045 Closes #861 Closes #790

3.10 API change: block_device_operations->release() returns void

2013-07-08T22:41:57Z

Linux kernel commit torvalds/linux@db2a144 changed the return type of block_device_operations->release() to void. Detect the expected prototype and defined our callout accordingly. Signed-off-by: Chris Dunlop Signed-off-by: Brian Behlendorf Closes #1494

Add SEEK_DATA/SEEK_HOLE to lseek()/llseek()

2013-07-02T16:24:43Z

The approach taken was the rework zfs_holey() as little as possible and then just wrap the code as needed to ensure correct locking and error handling. Tested with xfstests 285 and 286. All tests pass except for 7-9 of 285 which try to reserve blocks first via fallocate(2) and fail because fallocate(2) is not yet supported. Note that the filp->f_lock spinlock did not exist prior to Linux 2.6.30, but we avoid the need for autotools check by virtue of the fact that SEEK_DATA/SEEK_HOLE support was not added until Linux 3.1. An autoconf check was added for lseek_execute() which is currently a private function but the expectation is that it will be exported perhaps as early as Linux 3.11. Reviewed-by: Richard Laager Signed-off-by: Richard Yao Signed-off-by: Brian Behlendorf Closes #1384

Ensure --with-spl-timeout waits for spl_config.h and symvers

2013-05-02T22:40:44Z

The previous code was only waiting for the symver file. But the postinst target of the DKMS script for SPL will not only create the symvers file, but also the header spl_config.h. If we are waiting in the configure script of ZFS for the SPL symvers file, then we also need to wait for spl_config.h. Otherwise the configure script will abort because the spl_config.h is not yet available. On top of that, the function ZFS_AC_SPL_MODULE_SYMVERS is moved to the end of the function ZFS_AC_SPL to allow both checks share the with-spl-timeout parameter. Signed-off-by: Brian Behlendorf Closes #1431

Set RPM_DEFINE_COMMON options

2013-04-24T23:18:55Z

When the kmod packaging was introduced the ability to pass the --enable-debug and --enable-dmu-tx options from configure all the way through to `make rpm|deb` was accidenally lost. Update ZFS_AC_RPM to explicitlu set RPM_DEFINE_COMMON with these rpmbuild defines. Signed-off-by: Brian Behlendorf Issue #1402

Add --bump=0 to alien

2013-04-24T23:18:53Z

Preserve the release field when creating Debian packages. The --keep-version option was not used because it results in a failure when the git '_' syntax is used for the release. The '_' is a valid character for RPM packages but not for DEBs. Signed-off-by: Brian Behlendorf Signed-off-by: Turbo Fredriksson Issue #1402 Issue #928

Support .nogitrelease file

2013-04-24T23:18:49Z

When building a custom release in a git tree provide the ability to prevent the release field from being overwritten by the `git describe` output. Signed-off-by: Brian Behlendorf Issue #1402

Replace the ZFS_AC_META perl dependency with awk

2013-04-02T23:05:45Z

The only remaining perl dependency is part of the ZFS_AC_META macro. By eliminating this and replacing it with awk we can avoid the need to pull in perl to rebuild the packages. Signed-off-by: Brian Behlendorf Issue #1380

build: do not call boilerplate ourself

2013-04-02T17:55:20Z

Rationale see section 3.5 "Using `autoreconf' to Update `configure' Scripts" of the autoconf manual. http://www.gnu.org/software/autoconf/manual/autoconf-2.67/html_node/autoreconf-Invocation.html Signed-off-by: Jan Engelhardt Signed-off-by: Brian Behlendorf