forked from mirrors/nixpkgs
150 lines
4.5 KiB
Diff
150 lines
4.5 KiB
Diff
diff --git a/config/kernel-vfs-rw-iterate.m4 b/config/kernel-vfs-rw-iterate.m4
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new file mode 100644
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index 0000000..f8dc422
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--- /dev/null
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+++ b/config/kernel-vfs-rw-iterate.m4
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@@ -0,0 +1,27 @@
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+dnl #
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+dnl # Linux 4.1.x API
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+dnl #
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+AC_DEFUN([ZFS_AC_KERNEL_VFS_RW_ITERATE],
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+ [AC_MSG_CHECKING([whether fops->read/write_iter() are available])
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+ ZFS_LINUX_TRY_COMPILE([
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+ #include <linux/fs.h>
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+
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+ ssize_t test_read(struct kiocb *kiocb, struct iov_iter *to)
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+ { return 0; }
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+ ssize_t test_write(struct kiocb *kiocb, struct iov_iter *from)
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+ { return 0; }
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+
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+ static const struct file_operations
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+ fops __attribute__ ((unused)) = {
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+ .read_iter = test_read,
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+ .write_iter = test_write,
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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_VFS_RW_ITERATE, 1,
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+ [fops->read/write_iter() are available])
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+ ],[
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+ AC_MSG_RESULT(no)
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+ ])
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+])
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diff --git a/config/kernel.m4 b/config/kernel.m4
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index a9f2f58..fe42e17 100644
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--- a/config/kernel.m4
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+++ b/config/kernel.m4
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@@ -96,6 +96,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
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ZFS_AC_KERNEL_5ARG_SGET
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ZFS_AC_KERNEL_LSEEK_EXECUTE
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ZFS_AC_KERNEL_VFS_ITERATE
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+ ZFS_AC_KERNEL_VFS_RW_ITERATE
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AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
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KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
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diff --git a/module/zfs/zpl_file.c b/module/zfs/zpl_file.c
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index 66db113..5471140 100644
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--- a/module/zfs/zpl_file.c
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+++ b/module/zfs/zpl_file.c
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@@ -196,8 +196,7 @@ zpl_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
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static int
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zpl_aio_fsync(struct kiocb *kiocb, int datasync)
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{
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- return (zpl_fsync(kiocb->ki_filp, kiocb->ki_pos,
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- kiocb->ki_pos + kiocb->ki_nbytes, datasync));
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+ return (zpl_fsync(kiocb->ki_filp, kiocb->ki_pos, -1, datasync));
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}
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#else
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#error "Unsupported fops->fsync() implementation"
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@@ -261,12 +260,11 @@ zpl_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
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}
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static ssize_t
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-zpl_aio_read(struct kiocb *kiocb, const struct iovec *iovp,
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- unsigned long nr_segs, loff_t pos)
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+zpl_iter_read_common(struct kiocb *kiocb, const struct iovec *iovp,
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+ unsigned long nr_segs, size_t count)
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{
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cred_t *cr = CRED();
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struct file *filp = kiocb->ki_filp;
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- size_t count = kiocb->ki_nbytes;
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ssize_t read;
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size_t alloc_size = sizeof (struct iovec) * nr_segs;
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struct iovec *iov_tmp = kmem_alloc(alloc_size, KM_SLEEP);
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@@ -284,6 +282,22 @@ zpl_aio_read(struct kiocb *kiocb, const struct iovec *iovp,
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return (read);
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}
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+#if defined(HAVE_VFS_RW_ITERATE)
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+static ssize_t
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+zpl_iter_read(struct kiocb *kiocb, struct iov_iter *to)
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+{
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+ return (zpl_iter_read_common(kiocb, to->iov, to->nr_segs,
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+ iov_iter_count(to)));
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+}
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+#else
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+static ssize_t
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+zpl_aio_read(struct kiocb *kiocb, const struct iovec *iovp,
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+ unsigned long nr_segs, loff_t pos)
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+{
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+ return (zpl_iter_read_common(kiocb, iovp, nr_segs, kiocb->ki_nbytes));
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+}
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+#endif /* HAVE_VFS_RW_ITERATE */
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+
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static inline ssize_t
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zpl_write_common_iovec(struct inode *ip, const struct iovec *iovp, size_t count,
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unsigned long nr_segs, loff_t *ppos, uio_seg_t segment,
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@@ -344,12 +358,11 @@ zpl_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
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}
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static ssize_t
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-zpl_aio_write(struct kiocb *kiocb, const struct iovec *iovp,
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- unsigned long nr_segs, loff_t pos)
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+zpl_iter_write_common(struct kiocb *kiocb, const struct iovec *iovp,
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+ unsigned long nr_segs, size_t count)
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{
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cred_t *cr = CRED();
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struct file *filp = kiocb->ki_filp;
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- size_t count = kiocb->ki_nbytes;
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ssize_t wrote;
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size_t alloc_size = sizeof (struct iovec) * nr_segs;
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struct iovec *iov_tmp = kmem_alloc(alloc_size, KM_SLEEP);
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@@ -367,6 +380,22 @@ zpl_aio_write(struct kiocb *kiocb, const struct iovec *iovp,
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return (wrote);
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}
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+#if defined(HAVE_VFS_RW_ITERATE)
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+static ssize_t
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+zpl_iter_write(struct kiocb *kiocb, struct iov_iter *from)
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+{
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+ return (zpl_iter_write_common(kiocb, from->iov, from->nr_segs,
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+ iov_iter_count(from)));
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+}
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+#else
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+static ssize_t
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+zpl_aio_write(struct kiocb *kiocb, const struct iovec *iovp,
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+ unsigned long nr_segs, loff_t pos)
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+{
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+ return (zpl_iter_write_common(kiocb, iovp, nr_segs, kiocb->ki_nbytes));
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+}
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+#endif /* HAVE_VFS_RW_ITERATE */
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+
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static loff_t
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zpl_llseek(struct file *filp, loff_t offset, int whence)
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{
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@@ -778,8 +807,13 @@ const struct file_operations zpl_file_operations = {
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.llseek = zpl_llseek,
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.read = zpl_read,
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.write = zpl_write,
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+#ifdef HAVE_VFS_RW_ITERATE
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+ .read_iter = zpl_iter_read,
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+ .write_iter = zpl_iter_write,
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+#else
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.aio_read = zpl_aio_read,
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.aio_write = zpl_aio_write,
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+#endif
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.mmap = zpl_mmap,
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.fsync = zpl_fsync,
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.aio_fsync = zpl_aio_fsync,
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