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Retire .write/.read file operations

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The .write/.read file operations callbacks can be retired since
support for .read_iter/.write_iter and .aio_read/.aio_write has
been added.  The vfs_write()/vfs_read() entry functions will
select the correct interface for the kernel.  This is desirable
because all VFS write/read operations now rely on common code.

This change also add the generic write checks to make sure that
ulimits are enforced correctly on write.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Closes #5587 
Closes #5673
This commit is contained in:
Chunwei Chen
2017-01-27 10:43:39 -08:00
committed by Brian Behlendorf
parent 986dd8aacc
commit 933ec99951
6 changed files with 132 additions and 37 deletions
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config/kernel.m4
+1
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@@ -104,6 +104,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_KERNEL_LSEEK_EXECUTE
ZFS_AC_KERNEL_VFS_ITERATE
ZFS_AC_KERNEL_VFS_RW_ITERATE
ZFS_AC_KERNEL_GENERIC_WRITE_CHECKS
ZFS_AC_KERNEL_KMAP_ATOMIC_ARGS
ZFS_AC_KERNEL_FOLLOW_DOWN_ONE
ZFS_AC_KERNEL_MAKE_REQUEST_FN