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/openbmc/qemu/tests/qemu-iotests/
H A D142.out51 cache.direct=on on backing
58 cache.direct=on on backing-file
74 …=TEST_DIR/t.qcow2,backing.file.filename=TEST_DIR/t.qcow2.base,node-name=image,backing.node-name=ba…
76 cache.writeback=off on backing
77 …backing.file.filename=TEST_DIR/t.qcow2.base,node-name=image,backing.node-name=backing,backing.file…
79 cache.writeback=off on backing-file
80 …backing.file.filename=TEST_DIR/t.qcow2.base,node-name=image,backing.node-name=backing,backing.file…
97 cache.no-flush=on on backing
104 cache.no-flush=on on backing-file
127 cache.direct=on on backing
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H A D228.out1 --- Implicit backing file ---
8 bs->backing->bs->filename: TEST_DIR/PID-base.img
13 --- change-backing-file ---
17 {"execute": "change-backing-file", "arguments": {"backing-file": "null-co://", "device": "node0", "…
20 bs->filename: json:{"backing": {"driver": "IMGFMT", "file": {"driver": "file", "filename": "TEST_DI…
22 bs->backing->bs->filename: TEST_DIR/PID-base.img
24 {"execute": "change-backing-file", "arguments": {"backing-file": "TEST_DIR/PID-base.img", "device":…
29 bs->backing->bs->filename: TEST_DIR/PID-base.img
31 {"execute": "change-backing-file", "arguments": {"backing-file": "file:TEST_DIR/PID-base.img", "dev…
34 bs->filename: json:{"backing": {"driver": "IMGFMT", "file": {"driver": "file", "filename": "TEST_DI…
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H A D22558 backing=$3
60 if [ -z "$backing" ]; then
61 backing="null"
63 backing="'$backing'"
72 'backing': $backing }"
75 overlay_opts=$(make_opts overlay "$TEST_IMG" backing)
76 base_opts=$(make_opts backing "$TEST_IMG.base")
77 not_base_opts=$(make_opts backing "$TEST_IMG.not_base")
H A D267132 run_test -blockdev driver=file,filename="$TEST_IMG.base",node-name=backing-file \
134 -blockdev driver=$IMGFMT,file=file,backing=backing-file,node-name=fmt
137 run_test -blockdev driver=file,filename="$TEST_IMG.base",node-name=backing-file \
138 -blockdev driver=$IMGFMT,file=backing-file,node-name=backing-fmt \
140 -blockdev driver=$IMGFMT,file=file,backing=backing-fmt,node-name=fmt
146 echo Internal snapshots on backing file:
156 nbd_server_add -w backing-fmt
161 run_qemu -blockdev driver=file,filename="$TEST_IMG.base",node-name=backing-file \
162 -blockdev driver=$IMGFMT,file=backing-file,node-name=backing-fmt \
164 -blockdev driver=$IMGFMT,file=file,backing=backing-fmt,node-name=fmt |
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H A D224.out4 {"execute": "blockdev-add", "arguments": {"backing": {"backing": {"backing": {"driver": "null-co"},…
6 …backing\": {\"driver\": \"null-co\"}, \"driver\": \"IMGFMT\", \"file\": {\"driver\": \"file\", \"f…
13 {"execute": "blockdev-add", "arguments": {"backing": {"backing": {"backing": {"driver": "null-co"},…
15 …backing\": {\"driver\": \"null-co\"}, \"driver\": \"IMGFMT\", \"file\": {\"driver\": \"file\", \"f…
H A D273.out5 …idf","backing":null} -blockdev file,node-name=topf,filename=TEST_DIR/t.IMGFMT -blockdev {"driver":…
27 "backing-image": {
28 "backing-image": {
35 "backing-filename-format": "IMGFMT",
41 "full-backing-filename": "TEST_DIR/t.IMGFMT.base",
42 "backing-filename": "TEST_DIR/t.IMGFMT.base",
45 "backing-filename-format": "IMGFMT",
51 "full-backing-filename": "TEST_DIR/t.IMGFMT.mid",
52 "backing-filename": "TEST_DIR/t.IMGFMT.mid",
106 "backing-image": {
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H A D301.out5 qemu-img: TEST_DIR/t.IMGFMT: Backing file specified without backing format
11 backing file: TEST_DIR/t.IMGFMT.base
15 Could not open backing image.
17 Could not open backing image.
23 Could not open backing image.
25 qemu-img: TEST_DIR/t.IMGFMT: unrecognized backing format 'garbage'
30 backing file: TEST_DIR/t.IMGFMT.base
33 qemu-img: TEST_DIR/t.IMGFMT: Backing file specified without backing format
39 backing file: TEST_DIR/t.IMGFMT.base
41 == commit cannot change type of raw backing file ==
H A D191.out118 "backing-image": {
126 "backing-filename-format": "IMGFMT",
132 "full-backing-filename": "TEST_DIR/t.IMGFMT.base",
133 "backing-filename": "TEST_DIR/t.IMGFMT.base",
187 "backing-image": {
195 "backing-filename-format": "IMGFMT",
201 "full-backing-filename": "TEST_DIR/t.IMGFMT.base",
202 "backing-filename": "TEST_DIR/t.IMGFMT.base",
256 "backing-image": {
264 "backing-filename-format": "IMGFMT",
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H A D114.out4 qemu-img: Use of backing file requires explicit backing format
11 backing file: TEST_DIR/t.IMGFMT.base
12 backing file format: foo
13 qemu-io: can't open device TEST_DIR/t.qcow2: Could not open backing file: Unknown driver 'foo'
17 qemu-img: Could not change the backing file to 'TEST_DIR/t.qcow2.base': backing format must be spec…
H A D051.out80 === Overriding backing file ===
82 Testing: -drive file=TEST_DIR/t.qcow2,driver=qcow2,backing.file.filename=TEST_DIR/t.qcow2.orig,if=n…
85 drive0 (NODE_NAME): json:{"backing": {"driver": "qcow2", "file": {"driver": "file", "filename": "TE…
91 Testing: -drive file=TEST_DIR/t.qcow2,driver=raw,backing.file.filename=TEST_DIR/t.qcow2.orig
92 …drive file=TEST_DIR/t.qcow2,driver=raw,backing.file.filename=TEST_DIR/t.qcow2.orig: Driver doesn't…
94 Testing: -drive file=TEST_DIR/t.qcow2,file.backing.driver=file,file.backing.filename=TEST_DIR/t.qco…
95 …e file=TEST_DIR/t.qcow2,file.backing.driver=file,file.backing.filename=TEST_DIR/t.qcow2.orig: Driv…
97 Testing: -drive file=TEST_DIR/t.qcow2,file.backing.driver=qcow2,file.backing.file.filename=TEST_DIR…
98 …ile=TEST_DIR/t.qcow2,file.backing.driver=qcow2,file.backing.file.filename=TEST_DIR/t.qcow2.orig: D…
175 …he=writeback,backing.file.filename=TEST_DIR/t.qcow2.base,backing.cache.no-flush=on,backing.node-na…
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H A D25828 def node(node_name, path, backing=None, fmt=None, throttle=None): argument
41 if backing is not None:
42 res['backing'] = backing
113 backing=node('node3', node3_path,
114 backing=node('node2', node2_path,
115 backing=node('node1', node1_path,
116 backing=node('node0', node0_path, throttle=commit_throttle,
H A D195.out6 Change backing file of mid (opened read-only)
8 Testing: -drive if=none,file=TEST_DIR/t.IMGFMT,backing.node-name=mid
40 backing file: /dev/null
41 backing file format: IMGFMT
43 Change backing file of top (opened writable)
78 backing file: /dev/null
79 backing file format: IMGFMT
H A D279.out6 == qemu-img info --backing-chain ==
10 backing file: TEST_DIR/t.IMGFMT.mid
15 backing file: TEST_DIR/t.IMGFMT.base
21 == qemu-img info --backing-chain --image-opts ==
25 backing file: TEST_DIR/t.IMGFMT.mid
30 backing file: TEST_DIR/t.IMGFMT.base
H A D051.pc.out80 === Overriding backing file ===
82 Testing: -drive file=TEST_DIR/t.qcow2,driver=qcow2,backing.file.filename=TEST_DIR/t.qcow2.orig,if=n…
85 drive0 (NODE_NAME): json:{"backing": {"driver": "qcow2", "file": {"driver": "file", "filename": "TE…
91 Testing: -drive file=TEST_DIR/t.qcow2,driver=raw,backing.file.filename=TEST_DIR/t.qcow2.orig
92 …drive file=TEST_DIR/t.qcow2,driver=raw,backing.file.filename=TEST_DIR/t.qcow2.orig: Driver doesn't…
94 Testing: -drive file=TEST_DIR/t.qcow2,file.backing.driver=file,file.backing.filename=TEST_DIR/t.qco…
95 …e file=TEST_DIR/t.qcow2,file.backing.driver=file,file.backing.filename=TEST_DIR/t.qcow2.orig: Driv…
97 Testing: -drive file=TEST_DIR/t.qcow2,file.backing.driver=qcow2,file.backing.file.filename=TEST_DIR…
98 …ile=TEST_DIR/t.qcow2,file.backing.driver=qcow2,file.backing.file.filename=TEST_DIR/t.qcow2.orig: D…
255 …he=writeback,backing.file.filename=TEST_DIR/t.qcow2.base,backing.cache.no-flush=on,backing.node-na…
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H A D04354 _img_info --backing-chain
63 _img_info --backing-chain
76 _img_info --backing-chain
87 _img_info --backing-chain | grep -v '^backing file format:'
91 _img_info --backing-chain --output=json | grep -v 'backing-filename-format'
H A D267.out128 === -blockdev with a backing file ===
132 …se,node-name=backing-file -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=file -blockde…
143 …backing-file -blockdev driver=IMGFMT,file=backing-file,node-name=backing-fmt -blockdev driver=file…
157 Internal snapshots on backing file:
159 === -blockdev with NBD server on the backing file ===
162 …backing-file -blockdev driver=IMGFMT,file=backing-file,node-name=backing-fmt -blockdev driver=file…
165 (qemu) nbd_server_add -w backing-fmt
178 Internal snapshots on backing file:
H A D043.out4 == backing file references self ==
27 backing file: TEST_DIR/t.IMGFMT.2.base
33 backing file: TEST_DIR/t.IMGFMT.1.base
47 "full-backing-filename": "TEST_DIR/t.IMGFMT.2.base",
48 "backing-filename": "TEST_DIR/t.IMGFMT.2.base",
56 "full-backing-filename": "TEST_DIR/t.IMGFMT.1.base",
57 "backing-filename": "TEST_DIR/t.IMGFMT.1.base",
H A D258.out7 {"execute": "blockdev-add", "arguments": {"backing": {"backing": {"backing": {"backing": {"driver":…
23 {"execute": "blockdev-add", "arguments": {"backing": {"backing": {"backing": {"backing": {"driver":…
H A D051130 echo === Overriding backing file ===
133 echo "info block" | run_qemu -drive file="$TEST_IMG",driver=qcow2,backing.file.filename="$TEST_IMG.…
137 run_qemu -drive file="$TEST_IMG",driver=raw,backing.file.filename="$TEST_IMG.orig"
138 run_qemu -drive file="$TEST_IMG",file.backing.driver=file,file.backing.filename="$TEST_IMG.orig"
139 run_qemu -drive file="$TEST_IMG",file.backing.driver=qcow2,file.backing.file.filename="$TEST_IMG.or…
259 printf "info block %s\n" '' file backing backing-file | \
260 …G",cache=$cache,backing.file.filename="$TEST_IMG.base",backing.cache.no-flush=on,backing.node-name…
H A D290.out3 ### Test 'qemu-io -c discard' on a QCOW2 image without a backing file
5 # Create an image with compat=0.10 without a backing file
17 # Create an image with compat=1.1 without a backing file
30 ### Test 'qemu-io -c discard' on a QCOW2 image with a backing file
32 # Create a backing image and fill it with data
36 # Create an image with compat=0.10 and a backing file
49 # Create an image with compat=1.1 and a backing file
/openbmc/linux/Documentation/ABI/testing/
H A Dsysfs-block-bcache5 A write to this file causes the backing device or cache to be
6 unregistered. If a backing device had dirty data in the cache,
9 all associated backing devices before unregistering themselves.
21 For a backing device that has cache, a symlink to
28 For backing devices: integer number of full cache hits,
35 For backing devices: integer number of cache misses.
41 For backing devices: cache hits as a percentage.
47 For backing devices: Threshold past which sequential IO will
63 For backing devices: When on, writeback caching is enabled and
72 For backing devices: when off, dirty data will not be written
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/openbmc/phosphor-mboxd/vpnor/
H A DREADME.md6 backing files.
26 * The BMC provide a directory tree presenting the backing files in a hierarchy
37 6. Access ranges that are valid may map into a backing file associated with
39 7. A read of a valid access range that maps into the backing file will render
40 the data held in the backing file at the appropriate offset
41 8. A read of a valid access range that does not map into the backing file will
44 10. A write to a valid access range that maps into the backing file will update
46 11. A write to a valid access range that does not map into the backing file
47 will expand the backing file to accommodate the write.
/openbmc/hiomapd/vpnor/
H A DREADME.md5 backing files.
23 - The BMC provide a directory tree presenting the backing files in a hierarchy
33 6. Access ranges that are valid may map into a backing file associated with the
35 7. A read of a valid access range that maps into the backing file will render
36 the data held in the backing file at the appropriate offset
37 8. A read of a valid access range that does not map into the backing file will
40 10. A write to a valid access range that maps into the backing file will update
42 11. A write to a valid access range that does not map into the backing file will
43 expand the backing file to accommodate the write.
/openbmc/linux/arch/x86/kernel/cpu/sgx/
H A Dmain.c160 struct sgx_backing *backing) in __sgx_encl_ewb() argument
168 pginfo.contents = (unsigned long)kmap_local_page(backing->contents); in __sgx_encl_ewb()
169 pginfo.metadata = (unsigned long)kmap_local_page(backing->pcmd) + in __sgx_encl_ewb()
170 backing->pcmd_offset; in __sgx_encl_ewb()
173 set_page_dirty(backing->pcmd); in __sgx_encl_ewb()
174 set_page_dirty(backing->contents); in __sgx_encl_ewb()
177 backing->pcmd_offset)); in __sgx_encl_ewb()
198 struct sgx_backing *backing) in sgx_encl_ewb() argument
216 ret = __sgx_encl_ewb(epc_page, va_slot, backing); in sgx_encl_ewb()
224 ret = __sgx_encl_ewb(epc_page, va_slot, backing); in sgx_encl_ewb()
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/openbmc/qemu/block/
H A Dcommit.c101 commit_top_backing_bs = s->commit_top_bs->backing->bs; in commit_abort()
224 return bdrv_co_preadv(bs->backing, offset, bytes, qiov, flags); in bdrv_commit_top_preadv()
230 bs->backing->bs->filename); in bdrv_commit_top_refresh_filename()
454 BlockBackend *src, *backing; in bdrv_commit() local
496 backing = blk_new(ctx, BLK_PERM_WRITE | BLK_PERM_RESIZE, BLK_PERM_ALL); in bdrv_commit()
515 ret = blk_insert_bs(backing, backing_file_bs, &local_err); in bdrv_commit()
527 backing_length = blk_getlength(backing); in bdrv_commit()
537 ret = blk_truncate(backing, length, false, PREALLOC_MODE_OFF, 0, in bdrv_commit()
564 ret = blk_pwrite(backing, offset, n, buf, 0); in bdrv_commit()
583 blk_flush(backing); in bdrv_commit()
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