| /Linux-v6.1/Documentation/admin-guide/device-mapper/ |
| D | snapshot.rst | 12 - To merge a snapshot of a block device back into the snapshot's origin
20 the origin device.
24 snapshot, snapshot-origin, and snapshot-merge.
26 - snapshot-origin <origin>
34 - snapshot <origin> <COW device> <persistent?> <chunksize>
37 A snapshot of the <origin> block device is created. Changed chunks of
40 from <origin> for unchanged data. <COW device> will often be
41 smaller than the origin and if it fills up the snapshot will become
55 snapshot-origin or snapshot-merge target must be suspended. A failure to
56 suspend the origin target could result in data corruption.
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| D | cache.rst | 39 The origin device always contains a copy of the logical block, which
52 1. An origin device - the big, slow one.
66 The origin is divided up into blocks of a fixed size. This block size
89 complete until it has hit both the origin and cache devices. Clean
93 to be coherent with the origin device, then all reads are served from
94 the origin device (all reads miss the cache) and all writes are
95 forwarded to the origin device; additionally, write hits cause cache
121 Migrating data between the origin and cache device uses bandwidth.
170 state for all of the origin device (compare with the dirty bitset
181 cache <metadata dev> <cache dev> <origin dev> <block size>
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| D | thin-provisioning.rst | 186 N.B. If the origin device that you wish to snapshot is active, you
197 identifier for the origin device.
202 between the origin and the snapshot. Indeed the snapshot is no
216 You can use an external **read only** device as an origin for a
218 thin device will be passed through to the origin. Writes trigger
225 You must not write to the origin device if you use this technique!
232 You don't mention the origin at this stage.
240 Append an extra parameter to the thin target specifying the origin::
245 same extra origin parameter.
364 create_snap <dev id> <origin id>
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| /Linux-v6.1/mm/kmsan/ |
| D | instrumentation.c | 41 /* Get shadow and origin pointers for a memory load with non-standard size. */
49 /* Get shadow and origin pointers for a memory store with non-standard size. */
58 * Declare functions that obtain shadow/origin pointers for loads and stores
117 * get_param0_metadata() and set_retval_metadata() to store the shadow/origin
122 depot_stack_handle_t *origin) in get_param0_metadata() argument
127 *origin = ctx->cstate.param_origin_tls[0]; in get_param0_metadata()
130 static inline void set_retval_metadata(u64 shadow, depot_stack_handle_t origin) in set_retval_metadata() argument
135 ctx->cstate.retval_origin_tls = origin; in set_retval_metadata()
141 depot_stack_handle_t origin; in __msan_memmove() local
145 get_param0_metadata(&shadow, &origin); in __msan_memmove()
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| D | init.c | 97 struct page *shadow, *origin; member
107 * time - as an origin block. On the third time the incoming block receives its
108 * shadow and origin ranges from the previously saved shadow and origin blocks,
116 struct page *shadow, *origin; in kmsan_memblock_free_pages() local
122 if (!held_back[order].origin) { in kmsan_memblock_free_pages()
123 held_back[order].origin = page; in kmsan_memblock_free_pages()
127 origin = held_back[order].origin; in kmsan_memblock_free_pages()
128 kmsan_setup_meta(page, shadow, origin, order); in kmsan_memblock_free_pages()
131 held_back[order].origin = NULL; in kmsan_memblock_free_pages()
168 struct page *page, *shadow, *origin; in do_collection() local
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| D | core.c | 151 * Overwrite the origin only if the corresponding in kmsan_internal_memmove_metadata()
160 * origin value. in kmsan_internal_memmove_metadata()
172 * dst_slots == src_slots + 1), there is an extra origin slot at the in kmsan_internal_memmove_metadata()
174 * origin from the previous slot. in kmsan_internal_memmove_metadata()
180 * these two origins are copied to three origin slots, so one of then in kmsan_internal_memmove_metadata()
184 * src origin: |o111|o222|....| in kmsan_internal_memmove_metadata()
188 * dst origin: |....|o111|o222| - fill the empty slot with o111 in kmsan_internal_memmove_metadata()
191 * dst origin: |o111|o222|....| - fill the empty slot with o222 in kmsan_internal_memmove_metadata()
235 * are copied around many times. Origin chains for such structures are in kmsan_internal_chain_origin()
258 u32 origin, bool checked) in kmsan_internal_set_shadow_origin() argument
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| D | shadow.c | 102 ret.origin = kmsan_get_metadata(address, KMSAN_META_ORIGIN); in kmsan_get_shadow_origin_ptr()
109 ret.origin = dummy_store_page; in kmsan_get_shadow_origin_ptr()
113 ret.origin = dummy_load_page; in kmsan_get_shadow_origin_ptr()
119 * Obtain the shadow or origin pointer for the given address, or NULL if there's
175 struct page *shadow, *origin; in kmsan_alloc_page() local
183 origin = origin_page_for(page); in kmsan_alloc_page()
187 __memset(page_address(origin), 0, PAGE_SIZE * pages); in kmsan_alloc_page()
201 * to just fill the origin pages with @handle. in kmsan_alloc_page()
204 ((depot_stack_handle_t *)page_address(origin))[i] = handle; in kmsan_alloc_page()
271 void *shadow, *origin; in kmsan_init_alloc_meta_for_range() local
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| D | report.c | 84 void kmsan_print_origin(depot_stack_handle_t origin) in kmsan_print_origin() argument
94 if (!origin) in kmsan_print_origin()
98 nr_entries = stack_depot_fetch(origin, &entries); in kmsan_print_origin()
99 depth = kmsan_depth_from_eb(stack_depot_get_extra_bits(origin)); in kmsan_print_origin()
115 * Origin chains deeper than KMSAN_MAX_ORIGIN_DEPTH are in kmsan_print_origin()
121 origin = entries[2]; in kmsan_print_origin()
148 void kmsan_report(depot_stack_handle_t origin, void *address, int size, in kmsan_report() argument
162 if (!origin) in kmsan_report()
169 is_uaf = kmsan_uaf_from_eb(stack_depot_get_extra_bits(origin)); in kmsan_report()
194 kmsan_print_origin(origin); in kmsan_report()
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| D | kmsan.h | 64 void *shadow, *origin; member
78 void kmsan_print_origin(depot_stack_handle_t origin);
82 * @origin: Stack ID of the uninitialized value.
92 * sharing the same origin. If an uninitialized value is used in a comparison,
96 * @off_last corresponding to different @origin values.
98 void kmsan_report(depot_stack_handle_t origin, void *address, int size,
152 * Pack and unpack the origin chain depth and UAF flag to/from the extra bits
183 u32 origin, bool checked);
194 struct page *origin, int order);
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| D | hooks.c | 147 * This function creates new shadow/origin pages for the physical pages mapped
148 * into the virtual memory. If those physical pages already had shadow/origin,
156 struct page *shadow, *origin; in kmsan_ioremap_page_range() local
167 origin = alloc_pages(gfp_mask, 1); in kmsan_ioremap_page_range()
174 vmalloc_origin(start + off + PAGE_SIZE), prot, &origin, in kmsan_ioremap_page_range()
185 struct page *shadow, *origin; in kmsan_iounmap_page_range() local
198 origin = kmsan_vmalloc_to_page_or_null((void *)v_origin); in kmsan_iounmap_page_range()
203 if (origin) in kmsan_iounmap_page_range()
204 __free_pages(origin, 1); in kmsan_iounmap_page_range()
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| /Linux-v6.1/fs/overlayfs/ |
| D | namei.c | 68 * A non-dir origin may be disconnected, which is fine, because in ovl_acceptable()
86 * Return -ENODATA for "origin unknown".
97 /* Treat larger version and unknown flags as "origin unknown" */ in ovl_check_fb_len()
101 /* Treat endianness mismatch as "origin unknown" */ in ovl_check_fb_len()
121 /* Zero size value means "copied up but origin unknown" */ in ovl_get_fh()
147 pr_warn_ratelimited("failed to get origin (%i)\n", res); in ovl_get_fh()
150 pr_warn_ratelimited("invalid origin (%*phN)\n", res, fh); in ovl_get_fh()
178 * Treat stale file handle to lower file as "origin unknown". in ovl_decode_real_fh()
356 struct dentry *origin = NULL; in ovl_check_origin_fh() local
368 origin = ovl_decode_real_fh(ofs, fh, ofs->layers[i].mnt, in ovl_check_origin_fh()
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| D | export.c | 99 * have the same uppermost lower layer as the origin's layer. We may need to
103 * Return the connected origin layer or < 0 on error.
119 /* Find the topmost origin layer connectable ancestor of @dentry */ in ovl_connect_layer()
129 * If @parent is not origin layer connectable, then copy up in ovl_connect_layer()
130 * @next which is origin layer connectable and we are done. in ovl_connect_layer()
156 * We only need to encode origin if there is a chance that the same object was
202 * Decoding a merge dir, whose origin's ancestor is under a redirected in ovl_check_encode_origin()
204 * ovl_connect_layer() will try to make origin's layer "connected" by in ovl_check_encode_origin()
455 * For decoded lower dir file handle, lookup index by origin to check in ovl_lookup_real_inode()
704 struct ovl_path origin = { }; in ovl_lower_fh_to_d() local
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| /Linux-v6.1/Documentation/dev-tools/ |
| D | kmsan.rst | 95 incorrect shadow/origin values, likely leading to false positives. Functions
160 Origin tracking
163 Every four bytes of kernel memory also have a so-called origin mapped to them.
164 This origin describes the point in program execution at which the uninitialized
165 value was created. Every origin is associated with either the full allocation
169 When an uninitialized variable is allocated on stack or heap, a new origin
170 value is created, and that variable's origin is filled with that value. When a
171 value is read from memory, its origin is also read and kept together with the
172 shadow. For every instruction that takes one or more values, the origin of the
174 If a poisoned value is written into memory, its origin is written to the
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| /Linux-v6.1/drivers/md/ |
| D | dm-snap.c | 51 struct dm_dev *origin; member
56 /* List of snapshots per Origin */
72 /* Origin writes don't trigger exceptions until this is set */
127 * => use the origin; forget about the snapshot.
130 * (We can't use the intermediate origin state.)
173 return s->origin; in dm_snap_origin()
202 * Origin buffers waiting for this to complete are held
233 * Hash table mapping origin volumes to lists of snapshots and
309 * One of these per registered origin, held in the snapshot_origins hash
311 struct origin { struct
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| /Linux-v6.1/drivers/gpu/drm/i915/display/ |
| D | intel_frontbuffer.c | 71 * @origin: which operation caused the flush
81 enum fb_op_origin origin) in frontbuffer_flush() argument
91 trace_intel_frontbuffer_flush(frontbuffer_bits, origin); in frontbuffer_flush()
95 intel_psr_flush(i915, frontbuffer_bits, origin); in frontbuffer_flush()
96 intel_fbc_flush(i915, frontbuffer_bits, origin); in frontbuffer_flush()
167 enum fb_op_origin origin, in __intel_fb_invalidate() argument
172 if (origin == ORIGIN_CS) { in __intel_fb_invalidate()
179 trace_intel_frontbuffer_invalidate(frontbuffer_bits, origin); in __intel_fb_invalidate()
182 intel_psr_invalidate(i915, frontbuffer_bits, origin); in __intel_fb_invalidate()
184 intel_fbc_invalidate(i915, frontbuffer_bits, origin); in __intel_fb_invalidate()
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| D | intel_frontbuffer.h | 109 enum fb_op_origin origin,
115 * @origin: which operation caused the invalidation
124 enum fb_op_origin origin) in intel_frontbuffer_invalidate() argument
135 __intel_fb_invalidate(front, origin, frontbuffer_bits); in intel_frontbuffer_invalidate()
140 enum fb_op_origin origin,
146 * @origin: which operation caused the flush
152 enum fb_op_origin origin) in intel_frontbuffer_flush() argument
163 __intel_fb_flush(front, origin, frontbuffer_bits); in intel_frontbuffer_flush()
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| D | intel_display_trace.h | 547 TP_PROTO(unsigned int frontbuffer_bits, unsigned int origin),
548 TP_ARGS(frontbuffer_bits, origin),
552 __field(unsigned int, origin)
557 __entry->origin = origin;
560 TP_printk("frontbuffer_bits=0x%08x, origin=%u",
561 __entry->frontbuffer_bits, __entry->origin)
565 TP_PROTO(unsigned int frontbuffer_bits, unsigned int origin),
566 TP_ARGS(frontbuffer_bits, origin),
570 __field(unsigned int, origin)
575 __entry->origin = origin;
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| /Linux-v6.1/drivers/infiniband/hw/hns/ |
| D | hns_roce_common.h | 42 #define roce_get_field(origin, mask, shift) \ argument
43 ((le32_to_cpu(origin) & (mask)) >> (u32)(shift))
45 #define roce_get_bit(origin, shift) \ argument
46 roce_get_field((origin), (1ul << (shift)), (shift))
48 #define roce_set_field(origin, mask, shift, val) \ argument
50 (origin) &= ~cpu_to_le32(mask); \
51 (origin) |= \
55 #define roce_set_bit(origin, shift, val) \ argument
56 roce_set_field((origin), (1ul << (shift)), (shift), (val))
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| /Linux-v6.1/security/loadpin/ |
| D | loadpin.c | 26 static void report_load(const char *origin, struct file *file, char *operation) in report_load() argument
34 origin, operation, in report_load()
129 const char *origin = kernel_read_file_id_str(id); in loadpin_read_file() local
143 report_load(origin, file, "pinning-excluded"); in loadpin_read_file()
150 report_load(origin, NULL, "old-api-pinning-ignored"); in loadpin_read_file()
154 report_load(origin, NULL, "old-api-denied"); in loadpin_read_file()
176 report_load(origin, file, "pinned"); in loadpin_read_file()
184 report_load(origin, file, "pinning-ignored"); in loadpin_read_file()
188 report_load(origin, file, "denied"); in loadpin_read_file()
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| /Linux-v6.1/drivers/net/ethernet/hisilicon/ |
| D | hns_mdio.c | 108 #define mdio_set_field(origin, mask, shift, val) \ argument
110 (origin) &= (~((mask) << (shift))); \
111 (origin) |= (((val) & (mask)) << (shift)); \
114 #define mdio_get_field(origin, mask, shift) (((origin) >> (shift)) & (mask)) argument
119 u32 origin = mdio_read_reg(base, reg); in mdio_set_reg_field() local
121 mdio_set_field(origin, mask, shift, val); in mdio_set_reg_field()
122 mdio_write_reg(base, reg, origin); in mdio_set_reg_field()
130 u32 origin; in mdio_get_reg_field() local
132 origin = mdio_read_reg(base, reg); in mdio_get_reg_field()
133 return mdio_get_field(origin, mask, shift); in mdio_get_reg_field()
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| /Linux-v6.1/drivers/net/ethernet/hisilicon/hns/ |
| D | hns_dsaf_reg.h | 1043 #define dsaf_set_field(origin, mask, shift, val) \ argument
1045 (origin) &= (~(mask)); \
1046 (origin) |= (((val) << (shift)) & (mask)); \
1049 #define dsaf_set_bit(origin, shift, val) \ argument
1050 dsaf_set_field((origin), (1ull << (shift)), (shift), (val))
1055 u32 origin = dsaf_read_reg(base, reg); in dsaf_set_reg_field() local
1057 dsaf_set_field(origin, mask, shift, val); in dsaf_set_reg_field()
1058 dsaf_write_reg(base, reg, origin); in dsaf_set_reg_field()
1067 #define dsaf_get_field(origin, mask, shift) (((origin) & (mask)) >> (shift)) argument
1069 #define dsaf_get_bit(origin, shift) \ argument
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| /Linux-v6.1/drivers/crypto/qat/qat_common/ |
| D | adf_pfvf_msg.h | 34 * | | Message Origin
45 * | | Message Origin
49 * Message Origin (Should always be 1)
51 * by this driver; these had a Msg Origin of 0 and are ignored by this driver.
66 * Both the Interrupt bit and the Message Origin bit retain the same position
77 * | | Message Origin
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| /Linux-v6.1/block/partitions/ |
| D | msdos.c | 251 sector_t offset, sector_t size, int origin) in parse_solaris_x86() argument
269 snprintf(tmp, sizeof(tmp), " %s%d: <solaris:", state->name, origin); in parse_solaris_x86()
356 sector_t offset, sector_t size, int origin, char *flavour, in parse_bsd() argument
372 snprintf(tmp, sizeof(tmp), " %s%d: <%s:", state->name, origin, flavour); in parse_bsd()
410 sector_t offset, sector_t size, int origin) in parse_freebsd() argument
413 parse_bsd(state, offset, size, origin, "bsd", BSD_MAXPARTITIONS); in parse_freebsd()
418 sector_t offset, sector_t size, int origin) in parse_netbsd() argument
421 parse_bsd(state, offset, size, origin, "netbsd", BSD_MAXPARTITIONS); in parse_netbsd()
426 sector_t offset, sector_t size, int origin) in parse_openbsd() argument
429 parse_bsd(state, offset, size, origin, "openbsd", in parse_openbsd()
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| /Linux-v6.1/arch/s390/kvm/ |
| D | interrupt.c | 291 word = READ_ONCE(gi->origin->u64.word[0]); in gisa_get_ipm_or_restore_iam()
297 } while (cmpxchg(&gi->origin->u64.word[0], word, _word) != word); in gisa_get_ipm_or_restore_iam()
342 if (gi->origin) in pending_irqs()
343 pending_mask |= gisa_get_ipm(gi->origin) << IRQ_PEND_IO_ISC_7; in pending_irqs()
1215 if (gi->origin && gisa_tac_ipm_gisc(gi->origin, isc)) { in __deliver_io()
1319 if (gi->origin && in kvm_s390_handle_wait()
1747 if (!gi->origin) in get_top_gisa_isc()
1750 active_mask = (isc_mask & gisa_get_ipm(gi->origin) << 24) << 32; in get_top_gisa_isc()
1753 if (gisa_tac_ipm_gisc(gi->origin, isc)) in get_top_gisa_isc()
1794 gisa_set_ipm_gisc(gi->origin, isc); in kvm_s390_get_io_int()
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| /Linux-v6.1/fs/ |
| D | pnode.c | 142 * @origin: the original mount from where the tree walk initiated
150 struct mount *origin) in propagation_next() argument
159 if (master == origin->mnt_master) { in propagation_next()
161 return (next == origin) ? NULL : next; in propagation_next()
171 struct mount *origin) in skip_propagation_subtree() argument
183 static struct mount *next_group(struct mount *m, struct mount *origin) in next_group() argument
191 if (m->mnt_group_id == origin->mnt_group_id) { in next_group()
192 if (next == origin) in next_group()
204 if (master->mnt_group_id == origin->mnt_group_id) in next_group()
210 if (m == origin) in next_group()
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