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a3478c0747
In torvalds/linux@a528d35, there are changes to the getattr family of functions, struct kstat, and the interface of inode_operations .getattr. The inode_operations .getattr and simple_getattr() interface changed to: int (*getattr) (const struct path *, struct dentry *, struct kstat *, u32 request_mask, unsigned int query_flags) The request_mask argument indicates which field(s) the caller intends to use. Fields the caller has not specified via request_mask may be set in the returned struct anyway, but their values may be approximate. The query_flags argument indicates whether the filesystem must update the attributes from the backing store. Currently both fields are ignored. It is possible that getattr-related functions within zfs could be optimized based on the request_mask. struct kstat includes new fields: u32 result_mask; /* What fields the user got */ u64 attributes; /* See STATX_ATTR_* flags */ struct timespec btime; /* File creation time */ Fields attribute and btime are cleared; the result_mask reflects this. These appear to be optional based on simple_getattr() and vfs_getattr() within the kernel, which take the same approach. Reviewed-by: Chunwei Chen <david.chen@osnexus.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Olaf Faaland <faaland1@llnl.gov> Closes #5875
68 lines
1.5 KiB
Plaintext
68 lines
1.5 KiB
Plaintext
dnl #
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dnl # Linux 4.11 API
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dnl # See torvalds/linux@a528d35
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dnl #
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AC_DEFUN([ZFS_AC_PATH_KERNEL_IOPS_GETATTR], [
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AC_MSG_CHECKING([whether iops->getattr() takes a path])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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int test_getattr(
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const struct path *p, struct kstat *k,
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u32 request_mask, unsigned int query_flags)
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{ return 0; }
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static const struct inode_operations
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iops __attribute__ ((unused)) = {
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.getattr = test_getattr,
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};
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],[
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_PATH_IOPS_GETATTR, 1,
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[iops->getattr() takes a path])
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],[
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AC_MSG_RESULT(no)
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])
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])
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dnl #
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dnl # Linux 3.9 - 4.10 API
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dnl #
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AC_DEFUN([ZFS_AC_VFSMOUNT_KERNEL_IOPS_GETATTR], [
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AC_MSG_CHECKING([whether iops->getattr() takes a vfsmount])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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int test_getattr(
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struct vfsmount *mnt, struct dentry *d,
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struct kstat *k)
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{ return 0; }
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static const struct inode_operations
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iops __attribute__ ((unused)) = {
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.getattr = test_getattr,
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};
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],[
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_VFSMOUNT_IOPS_GETATTR, 1,
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[iops->getattr() takes a vfsmount])
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],[
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AC_MSG_RESULT(no)
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])
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])
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dnl #
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dnl # The interface of the getattr callback from the inode_operations
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dnl # structure changed. Also, the interface of the simple_getattr()
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dnl # function provided by the kernel changed.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_INODE_OPERATIONS_GETATTR], [
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ZFS_AC_PATH_KERNEL_IOPS_GETATTR
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ZFS_AC_VFSMOUNT_KERNEL_IOPS_GETATTR
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])
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