The Samba-Bugzilla – Attachment 16669 Details for
Bug 12033
smbd should support copy_file_range() for FSCTL_SRV_COPYCHUNK
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[patch]
Patch for 4.14 cherry-picked from master
v414-bug12033.patch (text/plain), 19.17 KB, created by
Ralph Böhme
on 2021-07-01 15:34:55 UTC
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Description:
Patch for 4.14 cherry-picked from master
Filename:
MIME Type:
Creator:
Ralph Böhme
Created:
2021-07-01 15:34:55 UTC
Size:
19.17 KB
patch
obsolete
>From a6ffaa5714c963c3e6f8af47482651c2ca241597 Mon Sep 17 00:00:00 2001 >From: Ralph Boehme <slow@samba.org> >Date: Thu, 24 Jun 2021 14:13:50 +0200 >Subject: [PATCH 1/5] replace: copy_file_range() > >BUG: https://bugzilla.samba.org/show_bug.cgi?id=12033 > >Signed-off-by: Ralph Boehme <slow@samba.org> >Reviewed-by: Jeremy Allison <jra@samba.org> >(cherry picked from commit 4dcc04228df233be15efe9c31bcbaba822b140c4) >--- > lib/replace/replace.c | 25 +++++++++++++++++++++++++ > lib/replace/replace.h | 10 ++++++++++ > lib/replace/wscript | 12 +++++++++++- > 3 files changed, 46 insertions(+), 1 deletion(-) > >diff --git a/lib/replace/replace.c b/lib/replace/replace.c >index 99b18e82590..0652cb4e6d6 100644 >--- a/lib/replace/replace.c >+++ b/lib/replace/replace.c >@@ -1056,3 +1056,28 @@ const char *rep_getprogname(void) > #endif /* HAVE_PROGRAM_INVOCATION_SHORT_NAME */ > } > #endif /* HAVE_GETPROGNAME */ >+ >+#ifndef HAVE_COPY_FILE_RANGE >+# ifdef HAVE_SYSCALL_COPY_FILE_RANGE >+# include <sys/syscall.h> >+# endif >+ssize_t rep_copy_file_range(int fd_in, >+ loff_t *off_in, >+ int fd_out, >+ loff_t *off_out, >+ size_t len, >+ unsigned int flags) >+{ >+# ifdef HAVE_SYSCALL_COPY_FILE_RANGE >+ return syscall(__NR_copy_file_range, >+ fd_in, >+ off_in, >+ fd_out, >+ off_out, >+ len, >+ flags); >+# endif /* HAVE_SYSCALL_COPY_FILE_RANGE */ >+ errno = ENOSYS; >+ return -1; >+} >+#endif /* HAVE_COPY_FILE_RANGE */ >diff --git a/lib/replace/replace.h b/lib/replace/replace.h >index e08bf7c2e58..a546185d47a 100644 >--- a/lib/replace/replace.h >+++ b/lib/replace/replace.h >@@ -964,6 +964,16 @@ int rep_memset_s(void *dest, size_t destsz, int ch, size_t count); > const char *rep_getprogname(void); > #endif > >+#ifndef HAVE_COPY_FILE_RANGE >+#define copy_file_range rep_copy_file_range >+ssize_t rep_copy_file_range(int fd_in, >+ loff_t *off_in, >+ int fd_out, >+ loff_t *off_out, >+ size_t len, >+ unsigned int flags); >+#endif /* HAVE_COPY_FILE_RANGE */ >+ > #ifndef FALL_THROUGH > # ifdef HAVE_FALLTHROUGH_ATTRIBUTE > # define FALL_THROUGH __attribute__ ((fallthrough)) >diff --git a/lib/replace/wscript b/lib/replace/wscript >index 2c856b61a0f..3811084db3c 100644 >--- a/lib/replace/wscript >+++ b/lib/replace/wscript >@@ -465,6 +465,16 @@ samba_dist.DIST_DIRS('lib/replace buildtools:buildtools third_party/waf:third_pa > conf.CHECK_FUNCS('getpwent_r getpwnam_r getpwuid_r epoll_create') > conf.CHECK_FUNCS('port_create') > conf.CHECK_FUNCS('getprogname') >+ if not conf.CHECK_FUNCS('copy_file_range'): >+ conf.CHECK_CODE(''' >+#include <sys/syscall.h> >+#include <unistd.h> >+syscall(SYS_copy_file_range,0,NULL,0,NULL,0,0); >+ ''', >+ 'HAVE_SYSCALL_COPY_FILE_RANGE', >+ msg='Checking whether we have copy_file_range system call') >+ if conf.CONFIG_SET('HAVE_COPY_FILE_RANGE') or conf.CONFIG_SET('HAVE_SYSCALL_COPY_FILE_RANGE'): >+ conf.DEFINE('USE_COPY_FILE_RANGE', 1) > > conf.SET_TARGET_TYPE('attr', 'EMPTY') > >@@ -846,7 +856,7 @@ REPLACEMENT_FUNCTIONS = { > 'strsep', 'strtok_r', 'strtoll', 'strtoull', 'setenv', 'unsetenv', > 'utime', 'utimes', 'dup2', 'chown', 'link', 'readlink', > 'symlink', 'lchown', 'realpath', 'memmem', 'vdprintf', >- 'dprintf', 'get_current_dir_name', >+ 'dprintf', 'get_current_dir_name', 'copy_file_range', > 'strerror_r', 'clock_gettime', 'memset_s'], > 'timegm.c': ['timegm'], > # Note: C99_VSNPRINTF is not a function, but a special condition >-- >2.31.1 > > >From f51239a3d63b9d973e0fd8077612c114e0cb8040 Mon Sep 17 00:00:00 2001 >From: Ralph Boehme <slow@samba.org> >Date: Fri, 25 Jun 2021 15:47:38 +0200 >Subject: [PATCH 2/5] vfs_default: properly track written bytes for copy-chunk > >No change in behavour, this just makes the logic slightly more >understandable. In theory it would also allow the logic to be adjusted for >allowing short reads which is not quite clear from MS-SMB2 if we should allow >it. The file could be truncated while we're reading it. > >BUG: https://bugzilla.samba.org/show_bug.cgi?id=12033 > >Signed-off-by: Ralph Boehme <slow@samba.org> >Reviewed-by: Jeremy Allison <jra@samba.org> >(cherry picked from commit e2d524d4baee193b0d03df3e7edda48b3cb4bddf) >--- > source3/modules/vfs_default.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > >diff --git a/source3/modules/vfs_default.c b/source3/modules/vfs_default.c >index 8d592bbad64..2d116ec1a2e 100644 >--- a/source3/modules/vfs_default.c >+++ b/source3/modules/vfs_default.c >@@ -1968,6 +1968,7 @@ struct vfswrap_offload_write_state { > off_t dst_off; > off_t to_copy; > off_t remaining; >+ off_t copied; > size_t next_io_size; > }; > >@@ -2278,6 +2279,7 @@ static void vfswrap_offload_write_write_done(struct tevent_req *subreq) > tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR); > return; > } >+ state->copied += nwritten; > state->remaining -= nwritten; > if (state->remaining == 0) { > tevent_req_done(req); >@@ -2314,7 +2316,7 @@ static NTSTATUS vfswrap_offload_write_recv(struct vfs_handle_struct *handle, > return status; > } > >- *copied = state->to_copy; >+ *copied = state->copied; > DBG_DEBUG("copy chunk copied %lu\n", (unsigned long)*copied); > tevent_req_received(req); > >-- >2.31.1 > > >From 653f61a37d0b771733470a81a4eaa37bf3d7b99c Mon Sep 17 00:00:00 2001 >From: Ralph Boehme <slow@samba.org> >Date: Sat, 26 Jun 2021 12:21:19 +0200 >Subject: [PATCH 3/5] lib: add sys_io_ranges_overlap() > >BUG: https://bugzilla.samba.org/show_bug.cgi?id=12033 > >Signed-off-by: Ralph Boehme <slow@samba.org> >Reviewed-by: Jeremy Allison <jra@samba.org> >(cherry picked from commit 4f1a02909b8694dcc30fd5c7c6772fcfa1092ed9) >--- > lib/util/sys_rw.c | 25 ++++++++ > lib/util/sys_rw.h | 2 + > lib/util/tests/test_sys_rw.c | 110 +++++++++++++++++++++++++++++++++++ > lib/util/wscript_build | 6 ++ > selftest/tests.py | 2 + > 5 files changed, 145 insertions(+) > create mode 100644 lib/util/tests/test_sys_rw.c > >diff --git a/lib/util/sys_rw.c b/lib/util/sys_rw.c >index d74395fc409..02aaa871a39 100644 >--- a/lib/util/sys_rw.c >+++ b/lib/util/sys_rw.c >@@ -48,6 +48,31 @@ bool sys_valid_io_range(off_t offset, size_t length) > return true; > } > >+bool sys_io_ranges_overlap(size_t c1, off_t o1, >+ size_t c2, off_t o2) >+{ >+ if (c1 == 0 || c2 == 0) { >+ return false; >+ } >+ if (o2 < o1) { >+ /* >+ * o1 >+ * |····c1····| >+ * o2 >+ * |····c2···| ? >+ */ >+ return (o2 + c2 > o1); >+ } else { >+ /* >+ * o1 >+ * |····c1···| >+ * o2 >+ * |····c2····| ? >+ */ >+ return (o1 + c1 > o2); >+ } >+} >+ > /******************************************************************* > A read wrapper that will deal with EINTR/EWOULDBLOCK > ********************************************************************/ >diff --git a/lib/util/sys_rw.h b/lib/util/sys_rw.h >index b224ecb30ac..6693d34de57 100644 >--- a/lib/util/sys_rw.h >+++ b/lib/util/sys_rw.h >@@ -28,6 +28,8 @@ > struct iovec; > > bool sys_valid_io_range(off_t offset, size_t length); >+bool sys_io_ranges_overlap(size_t c1, off_t o1, >+ size_t c2, off_t o2); > ssize_t sys_read(int fd, void *buf, size_t count); > void sys_read_v(int fd, void *buf, size_t count); > ssize_t sys_write(int fd, const void *buf, size_t count); >diff --git a/lib/util/tests/test_sys_rw.c b/lib/util/tests/test_sys_rw.c >new file mode 100644 >index 00000000000..551a6a09bda >--- /dev/null >+++ b/lib/util/tests/test_sys_rw.c >@@ -0,0 +1,110 @@ >+/* >+ * Unix SMB/CIFS implementation. >+ * >+ * Unit test for sys_rw.c >+ * >+ * Copyright (C) Ralph Böhme 2021 >+ * >+ * This program is free software; you can redistribute it and/or modify >+ * it under the terms of the GNU General Public License as published by >+ * the Free Software Foundation; either version 3 of the License, or >+ * (at your option) any later version. >+ * >+ * This program is distributed in the hope that it will be useful, >+ * but WITHOUT ANY WARRANTY; without even the implied warranty of >+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >+ * GNU General Public License for more details. >+ * >+ * You should have received a copy of the GNU General Public License >+ * along with this program; if not, see <http://www.gnu.org/licenses/>. >+ */ >+ >+#include <stdarg.h> >+#include <stddef.h> >+#include <stdint.h> >+#include <setjmp.h> >+#include <cmocka.h> >+ >+#include "lib/replace/replace.h" >+#include "system/dir.h" >+ >+#include "lib/util/sys_rw.c" >+ >+static void test_sys_io_ranges_overlap(void **state) >+{ >+ bool overlap; >+ >+ /* >+ * sys_io_ranges_overlap() args are: >+ * >+ * src size, src offset, dst size, dst offset >+ */ >+ >+ /* src and dst size 0 => no overlap */ >+ overlap = sys_io_ranges_overlap(0, 0, 0, 0); >+ assert_false(overlap); >+ >+ /* dst size 0 => no overlap */ >+ overlap = sys_io_ranges_overlap(1, 0, 0, 0); >+ assert_false(overlap); >+ >+ /* src size 0 => no overlap */ >+ overlap = sys_io_ranges_overlap(0, 0, 1, 0); >+ assert_false(overlap); >+ >+ /* same range => overlap */ >+ overlap = sys_io_ranges_overlap(1, 0, 1, 0); >+ assert_true(overlap); >+ >+ /* >+ * |.| >+ * |.| >+ * src before dst => no overlap >+ */ >+ overlap = sys_io_ranges_overlap(1, 0, 1, 1); >+ assert_false(overlap); >+ >+ /* >+ * |..| >+ * |..| >+ * src into dst => overlap >+ */ >+ overlap = sys_io_ranges_overlap(2, 0, 2, 1); >+ assert_true(overlap); >+ >+ /* >+ * |....| >+ * |..| >+ * src encompasses dst => overlap >+ */ >+ overlap = sys_io_ranges_overlap(4, 0, 1, 2); >+ assert_true(overlap); >+ >+ >+ /* >+ * |..| >+ * |..| >+ * dst into src => overlap >+ */ >+ overlap = sys_io_ranges_overlap(2, 1, 2, 0); >+ assert_true(overlap); >+ >+ /* >+ * |..| >+ * |....| >+ * dst encompasses src => overlap >+ */ >+ overlap = sys_io_ranges_overlap(2, 1, 4, 0); >+ assert_true(overlap); >+} >+ >+int main(int argc, char **argv) >+{ >+ const struct CMUnitTest tests[] = { >+ cmocka_unit_test(test_sys_io_ranges_overlap), >+ }; >+ >+ cmocka_set_message_output(CM_OUTPUT_SUBUNIT); >+ >+ return cmocka_run_group_tests(tests, NULL, NULL); >+} >diff --git a/lib/util/wscript_build b/lib/util/wscript_build >index 460661e9a63..839d3c2e2e9 100644 >--- a/lib/util/wscript_build >+++ b/lib/util/wscript_build >@@ -356,3 +356,9 @@ bld.SAMBA_LIBRARY('genrand', > deps='cmocka replace talloc samba-util', > local_include=False, > for_selftest=True) >+ >+ bld.SAMBA_BINARY('test_sys_rw', >+ source='tests/test_sys_rw.c', >+ deps='cmocka replace samba-util', >+ local_include=False, >+ for_selftest=True) >diff --git a/selftest/tests.py b/selftest/tests.py >index 6bf46ae5621..3645904801a 100644 >--- a/selftest/tests.py >+++ b/selftest/tests.py >@@ -407,6 +407,8 @@ plantestsuite("samba.unittests.util", "none", > [os.path.join(bindir(), "default/lib/util/test_util")]) > plantestsuite("samba.unittests.memcache", "none", > [os.path.join(bindir(), "default/lib/util/test_memcache")]) >+plantestsuite("samba.unittests.sys_rw", "none", >+ [os.path.join(bindir(), "default/lib/util/test_sys_rw")]) > plantestsuite("samba.unittests.ntlm_check", "none", > [os.path.join(bindir(), "default/libcli/auth/test_ntlm_check")]) > plantestsuite("samba.unittests.gnutls", "none", >-- >2.31.1 > > >From caebb4ad4b5af7c5836bbde3c9ae11f3d910657c Mon Sep 17 00:00:00 2001 >From: Ralph Boehme <slow@samba.org> >Date: Mon, 28 Jun 2021 15:50:32 +0200 >Subject: [PATCH 4/5] smbd: use sys_io_ranges_overlap() in > fsctl_dup_extents_check_overlap() > >BUG: https://bugzilla.samba.org/show_bug.cgi?id=12033 > >Signed-off-by: Ralph Boehme <slow@samba.org> >Reviewed-by: Jeremy Allison <jra@samba.org> >(cherry picked from commit e72be5213335ab1ea0f9f396ab071669231c151b) >--- > source3/smbd/smb2_ioctl_filesys.c | 38 +++++-------------------------- > 1 file changed, 6 insertions(+), 32 deletions(-) > >diff --git a/source3/smbd/smb2_ioctl_filesys.c b/source3/smbd/smb2_ioctl_filesys.c >index e7bd11f90ab..f5c472c2cd1 100644 >--- a/source3/smbd/smb2_ioctl_filesys.c >+++ b/source3/smbd/smb2_ioctl_filesys.c >@@ -30,6 +30,7 @@ > #include "../librpc/ndr/libndr.h" > #include "librpc/gen_ndr/ndr_ioctl.h" > #include "smb2_ioctl_private.h" >+#include "lib/util/sys_rw.h" > > #undef DBGC_CLASS > #define DBGC_CLASS DBGC_SMB2 >@@ -96,43 +97,16 @@ static NTSTATUS fsctl_dup_extents_check_overlap(struct files_struct *src_fsp, > struct files_struct *dst_fsp, > struct fsctl_dup_extents_to_file *dup_extents) > { >- uint64_t src_off_last; >- uint64_t tgt_off_last; >- > if (!file_id_equal(&src_fsp->file_id, &dst_fsp->file_id)) { > /* src and dest refer to different files */ > return NT_STATUS_OK; > } > >- if (dup_extents->byte_count == 0) { >- /* no range to overlap */ >- return NT_STATUS_OK; >- } >- >- /* >- * [MS-FSCC] 2.3.8 FSCTL_DUPLICATE_EXTENTS_TO_FILE Reply >- * STATUS_NOT_SUPPORTED: >- * The source and target destination ranges overlap on the same file. >- */ >- >- src_off_last = dup_extents->source_off + dup_extents->byte_count - 1; >- if ((dup_extents->target_off >= dup_extents->source_off) >- && (dup_extents->target_off <= src_off_last)) { >- /* >- * src: |-----------| >- * tgt: |-----------| >- */ >- return NT_STATUS_NOT_SUPPORTED; >- } >- >- >- tgt_off_last = dup_extents->target_off + dup_extents->byte_count - 1; >- if ((tgt_off_last >= dup_extents->source_off) >- && (tgt_off_last <= src_off_last)) { >- /* >- * src: |-----------| >- * tgt: |-----------| >- */ >+ if (sys_io_ranges_overlap(dup_extents->byte_count, >+ dup_extents->source_off, >+ dup_extents->byte_count, >+ dup_extents->target_off)) >+ { > return NT_STATUS_NOT_SUPPORTED; > } > >-- >2.31.1 > > >From 8c923341429c4d75b471770fa30ce5c65fc0be96 Mon Sep 17 00:00:00 2001 >From: Ralph Boehme <slow@samba.org> >Date: Thu, 24 Jun 2021 16:21:42 +0200 >Subject: [PATCH 5/5] vfs_default: use copy_file_range() > >Original file on an XFS filesystem: > > $ ls -l /mnt/test/1048578-file > -rw-rw-r--. 1 slow slow 1048578 Jun 25 11:40 /mnt/test/1048578-file > > $ xfs_bmap /mnt/test/1048578-file > /mnt/test/1048578-file: > 0: [0..2055]: 192..2247 > >Copy created with cp --reflink=never: > > $ xfs_bmap /mnt/test/1048578-file-reflink-never > /mnt/test/1048578-file-reflink-never: > 0: [0..2055]: 2248..4303 > >Copy created with cp --reflink=always > > $ xfs_bmap /mnt/test/1048578-file-reflink-always > /mnt/test/1048578-file-reflink-always: > 0: [0..2055]: 192..2247 > >Copy done from a Windows client: > > $ xfs_bmap /mnt/test/1048578-file\ -\ Copy > /mnt/test/1048578-file - Copy: > 0: [0..2055]: 192..2247 > >BUG: https://bugzilla.samba.org/show_bug.cgi?id=12033 >RN: smbd should support copy_file_range() for FSCTL_SRV_COPYCHUNK > >Signed-off-by: Ralph Boehme <slow@samba.org> >Reviewed-by: Jeremy Allison <jra@samba.org> > >Autobuild-User(master): Jeremy Allison <jra@samba.org> >Autobuild-Date(master): Wed Jun 30 17:40:23 UTC 2021 on sn-devel-184 > >(cherry picked from commit accaa2f1f67a7f064a4ce03a120d7b2f8e847ccf) >--- > source3/modules/vfs_default.c | 134 ++++++++++++++++++++++++++++++++++ > 1 file changed, 134 insertions(+) > >diff --git a/source3/modules/vfs_default.c b/source3/modules/vfs_default.c >index 2d116ec1a2e..eafe1068d3b 100644 >--- a/source3/modules/vfs_default.c >+++ b/source3/modules/vfs_default.c >@@ -1988,6 +1988,7 @@ static void vfswrap_offload_write_cleanup(struct tevent_req *req, > state->dst_fsp = NULL; > } > >+static NTSTATUS vfswrap_offload_copy_file_range(struct tevent_req *req); > static NTSTATUS vfswrap_offload_write_loop(struct tevent_req *req); > > static struct tevent_req *vfswrap_offload_write_send( >@@ -2127,6 +2128,16 @@ static struct tevent_req *vfswrap_offload_write_send( > return tevent_req_post(req, ev); > } > >+ status = vfswrap_offload_copy_file_range(req); >+ if (NT_STATUS_IS_OK(status)) { >+ tevent_req_done(req); >+ return tevent_req_post(req, ev); >+ } >+ if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { >+ tevent_req_nterror(req, status); >+ return tevent_req_post(req, ev); >+ } >+ > state->buf = talloc_array(state, uint8_t, num); > if (tevent_req_nomem(state->buf, req)) { > return tevent_req_post(req, ev); >@@ -2141,6 +2152,129 @@ static struct tevent_req *vfswrap_offload_write_send( > return req; > } > >+static NTSTATUS vfswrap_offload_copy_file_range(struct tevent_req *req) >+{ >+ struct vfswrap_offload_write_state *state = tevent_req_data( >+ req, struct vfswrap_offload_write_state); >+ struct lock_struct lck; >+ ssize_t nwritten; >+ NTSTATUS status; >+ bool same_file; >+ bool ok; >+ >+#ifndef USE_COPY_FILE_RANGE >+ return NT_STATUS_MORE_PROCESSING_REQUIRED; >+#endif >+ >+ same_file = file_id_equal(&state->src_fsp->file_id, >+ &state->dst_fsp->file_id); >+ if (same_file && >+ sys_io_ranges_overlap(state->remaining, >+ state->src_off, >+ state->remaining, >+ state->dst_off)) >+ { >+ return NT_STATUS_MORE_PROCESSING_REQUIRED; >+ } >+ >+ if (is_named_stream(state->src_fsp->fsp_name) || >+ is_named_stream(state->dst_fsp->fsp_name)) >+ { >+ return NT_STATUS_MORE_PROCESSING_REQUIRED; >+ } >+ >+ init_strict_lock_struct(state->src_fsp, >+ state->src_fsp->op->global->open_persistent_id, >+ state->src_off, >+ state->remaining, >+ READ_LOCK, >+ &lck); >+ >+ ok = SMB_VFS_STRICT_LOCK_CHECK(state->src_fsp->conn, >+ state->src_fsp, >+ &lck); >+ if (!ok) { >+ return NT_STATUS_FILE_LOCK_CONFLICT; >+ } >+ >+ ok = change_to_user_and_service_by_fsp(state->dst_fsp); >+ if (!ok) { >+ return NT_STATUS_INTERNAL_ERROR; >+ } >+ >+ init_strict_lock_struct(state->dst_fsp, >+ state->dst_fsp->op->global->open_persistent_id, >+ state->dst_off, >+ state->remaining, >+ WRITE_LOCK, >+ &lck); >+ >+ ok = SMB_VFS_STRICT_LOCK_CHECK(state->dst_fsp->conn, >+ state->dst_fsp, >+ &lck); >+ if (!ok) { >+ return NT_STATUS_FILE_LOCK_CONFLICT; >+ } >+ >+ while (state->remaining > 0) { >+ nwritten = copy_file_range(fsp_get_pathref_fd(state->src_fsp), >+ &state->src_off, >+ fsp_get_pathref_fd(state->dst_fsp), >+ &state->dst_off, >+ state->remaining, >+ 0); >+ if (nwritten == -1) { >+ DBG_DEBUG("copy_file_range src [%s]:[%jd] dst [%s]:[%jd] " >+ "n [%jd] failed: %s\n", >+ fsp_str_dbg(state->src_fsp), >+ (intmax_t)state->src_off, >+ fsp_str_dbg(state->dst_fsp), >+ (intmax_t)state->dst_off, >+ (intmax_t)state->remaining, >+ strerror(errno)); >+ switch (errno) { >+ case EXDEV: >+ status = NT_STATUS_MORE_PROCESSING_REQUIRED; >+ break; >+ default: >+ status = map_nt_error_from_unix(errno); >+ if (NT_STATUS_EQUAL( >+ status, >+ NT_STATUS_MORE_PROCESSING_REQUIRED)) >+ { >+ /* Avoid triggering the fallback */ >+ status = NT_STATUS_INTERNAL_ERROR; >+ } >+ break; >+ } >+ return status; >+ } >+ >+ if (state->remaining < nwritten) { >+ DBG_DEBUG("copy_file_range src [%s] dst [%s] " >+ "n [%jd] remaining [%jd]\n", >+ fsp_str_dbg(state->src_fsp), >+ fsp_str_dbg(state->dst_fsp), >+ (intmax_t)nwritten, >+ (intmax_t)state->remaining); >+ return NT_STATUS_INTERNAL_ERROR; >+ } >+ >+ if (nwritten == 0) { >+ break; >+ } >+ state->copied += nwritten; >+ state->remaining -= nwritten; >+ } >+ >+ /* >+ * Tell the req cleanup function there's no need to call >+ * change_to_user_and_service_by_fsp() on the dst handle. >+ */ >+ state->dst_fsp = NULL; >+ return NT_STATUS_OK; >+} >+ > static void vfswrap_offload_write_read_done(struct tevent_req *subreq); > > static NTSTATUS vfswrap_offload_write_loop(struct tevent_req *req) >-- >2.31.1 >
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