diff options
| author | Etienne Dechamps <[email protected]> | 2011-09-02 09:42:07 +0200 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2012-02-09 16:19:32 -0800 |
| commit | cb2d19010d8fbcf6c22585cd8763fad3ba7db724 (patch) | |
| tree | b4fe64638a19856107953dc1a814c2e3f787c989 /config/kernel-fallocate.m4 | |
| parent | aec69371a6a2e94534809c5e9ba22e7b0e276937 (diff) | |
Support the fallocate() file operation.
Currently only the (FALLOC_FL_PUNCH_HOLE) flag combination is
supported, since it's the only one that matches the behavior of
zfs_space(). This makes it pretty much useless in its current
form, but it's a start.
To support other flag combinations we would need to modify
zfs_space() to make it more flexible, or emulate the desired
functionality in zpl_fallocate().
Signed-off-by: Brian Behlendorf <[email protected]>
Issue #334
Diffstat (limited to 'config/kernel-fallocate.m4')
| -rw-r--r-- | config/kernel-fallocate.m4 | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/config/kernel-fallocate.m4 b/config/kernel-fallocate.m4 new file mode 100644 index 000000000..d551276c7 --- /dev/null +++ b/config/kernel-fallocate.m4 @@ -0,0 +1,48 @@ +dnl # +dnl # Linux 2.6.38 - 3.x API +dnl # +AC_DEFUN([ZFS_AC_KERNEL_FILE_FALLOCATE], [ + AC_MSG_CHECKING([whether fops->fallocate() exists]) + ZFS_LINUX_TRY_COMPILE([ + #include <linux/fs.h> + ],[ + long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL; + struct file_operations fops __attribute__ ((unused)) = { + .fallocate = fallocate, + }; + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_FILE_FALLOCATE, 1, [fops->fallocate() exists]) + ],[ + AC_MSG_RESULT(no) + ]) +]) + +dnl # +dnl # Linux 2.6.x - 2.6.37 API +dnl # +AC_DEFUN([ZFS_AC_KERNEL_INODE_FALLOCATE], [ + AC_MSG_CHECKING([whether iops->fallocate() exists]) + ZFS_LINUX_TRY_COMPILE([ + #include <linux/fs.h> + ],[ + long (*fallocate) (struct inode *, int, loff_t, loff_t) = NULL; + struct inode_operations fops __attribute__ ((unused)) = { + .fallocate = fallocate, + }; + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_INODE_FALLOCATE, 1, [fops->fallocate() exists]) + ],[ + AC_MSG_RESULT(no) + ]) +]) + +dnl # +dnl # The fallocate callback was moved from the inode_operations +dnl # structure to the file_operations structure. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_FALLOCATE], [ + ZFS_AC_KERNEL_FILE_FALLOCATE + ZFS_AC_KERNEL_INODE_FALLOCATE +]) |