Revision 61b6c499 hw/virtio-9p-local.c
| b/hw/virtio-9p-local.c | ||
|---|---|---|
| 477 | 477 |
static ssize_t local_lgetxattr(FsContext *ctx, const char *path, |
| 478 | 478 |
const char *name, void *value, size_t size) |
| 479 | 479 |
{
|
| 480 |
if ((ctx->fs_sm == SM_MAPPED) && |
|
| 481 |
(strncmp(name, "user.virtfs.", 12) == 0)) {
|
|
| 482 |
/* |
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| 483 |
* Don't allow fetch of user.virtfs namesapce |
|
| 484 |
* in case of mapped security |
|
| 485 |
*/ |
|
| 486 |
errno = ENOATTR; |
|
| 487 |
return -1; |
|
| 488 |
} |
|
| 489 |
|
|
| 480 | 490 |
return lgetxattr(rpath(ctx, path), name, value, size); |
| 481 | 491 |
} |
| 482 | 492 |
|
| 483 | 493 |
static ssize_t local_llistxattr(FsContext *ctx, const char *path, |
| 484 | 494 |
void *value, size_t size) |
| 485 | 495 |
{
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| 486 |
return llistxattr(rpath(ctx, path), value, size); |
|
| 496 |
ssize_t retval; |
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| 497 |
ssize_t actual_len = 0; |
|
| 498 |
char *orig_value, *orig_value_start; |
|
| 499 |
char *temp_value, *temp_value_start; |
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ssize_t xattr_len, parsed_len = 0, attr_len; |
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| 501 |
|
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if (ctx->fs_sm != SM_MAPPED) {
|
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return llistxattr(rpath(ctx, path), value, size); |
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} |
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| 505 |
|
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/* Get the actual len */ |
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xattr_len = llistxattr(rpath(ctx, path), value, 0); |
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| 508 |
|
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/* Now fetch the xattr and find the actual size */ |
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orig_value = qemu_malloc(xattr_len); |
|
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xattr_len = llistxattr(rpath(ctx, path), orig_value, xattr_len); |
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| 512 |
|
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/* |
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* For mapped security model drop user.virtfs namespace |
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* from the list |
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*/ |
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temp_value = qemu_mallocz(xattr_len); |
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temp_value_start = temp_value; |
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orig_value_start = orig_value; |
|
| 520 |
while (xattr_len > parsed_len) {
|
|
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attr_len = strlen(orig_value) + 1; |
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| 522 |
if (strncmp(orig_value, "user.virtfs.", 12) != 0) {
|
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/* Copy this entry */ |
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strcat(temp_value, orig_value); |
|
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temp_value += attr_len; |
|
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actual_len += attr_len; |
|
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} |
|
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parsed_len += attr_len; |
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orig_value += attr_len; |
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} |
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if (!size) {
|
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retval = actual_len; |
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goto out; |
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} else if (size >= actual_len) {
|
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/* now copy the parsed attribute list back */ |
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memset(value, 0, size); |
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memcpy(value, temp_value_start, actual_len); |
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retval = actual_len; |
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goto out; |
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} |
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errno = ERANGE; |
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retval = -1; |
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out: |
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qemu_free(orig_value_start); |
|
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qemu_free(temp_value_start); |
|
| 546 |
return retval; |
|
| 487 | 547 |
} |
| 488 | 548 |
|
| 489 | 549 |
static int local_lsetxattr(FsContext *ctx, const char *path, const char *name, |
| 490 | 550 |
void *value, size_t size, int flags) |
| 491 | 551 |
{
|
| 552 |
if ((ctx->fs_sm == SM_MAPPED) && |
|
| 553 |
(strncmp(name, "user.virtfs.", 12) == 0)) {
|
|
| 554 |
/* |
|
| 555 |
* Don't allow fetch of user.virtfs namesapce |
|
| 556 |
* in case of mapped security |
|
| 557 |
*/ |
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errno = EACCES; |
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| 559 |
return -1; |
|
| 560 |
} |
|
| 492 | 561 |
return lsetxattr(rpath(ctx, path), name, value, size, flags); |
| 493 | 562 |
} |
| 494 | 563 |
|
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