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It should help to investigate errors of fsconfig, fsmount and etc. Signed-off-by: Andrei Vagin <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -39,7 +39,6 @@ | |
| #include "mem.h" | ||
| #include "namespaces.h" | ||
| #include "criu-log.h" | ||
| #include "util-caps.h" | ||
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| #include "clone-noasan.h" | ||
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@@ -1556,23 +1555,78 @@ void print_stack_trace(pid_t pid) | |
| } | ||
| #endif | ||
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| int cr_fsopen(const char *fsname, unsigned int flags) | ||
| { | ||
| return syscall(__NR_fsopen, fsname, flags); | ||
| } | ||
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| int cr_fsconfig(int fd, unsigned int cmd, const char *key, const char *value, int aux) | ||
| { | ||
| int ret = syscall(__NR_fsconfig, fd, cmd, key, value, aux); | ||
| if (ret) | ||
| fsfd_dump_messages(fd); | ||
| return ret; | ||
| } | ||
|
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| int cr_fsmount(int fd, unsigned int flags, unsigned int attr_flags) | ||
| { | ||
| int ret = syscall(__NR_fsmount, fd, flags, attr_flags); | ||
| if (ret) | ||
| fsfd_dump_messages(fd); | ||
| return ret; | ||
| } | ||
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| void fsfd_dump_messages(int fd) | ||
| { | ||
| char buf[4096]; | ||
|
Check warning on line 1581 in criu/util.c
|
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| int err, n; | ||
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| err = errno; | ||
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||
| for (;;) { | ||
| n = read(fd, buf, sizeof(buf) - 1); | ||
| if (n < 0) { | ||
| if (errno != ENODATA) | ||
| pr_perror("Unable to read from fs descriptor"); | ||
| break; | ||
| } | ||
| buf[n] = 0; | ||
|
|
||
| switch (buf[0]) { | ||
| case 'w': | ||
| pr_warn("%s\n", buf); | ||
| break; | ||
| case 'i': | ||
| pr_info("%s\n", buf); | ||
| break; | ||
| case 'e': | ||
| /* fallthrough */ | ||
| default: | ||
| pr_err("%s\n", buf); | ||
| break; | ||
| } | ||
| } | ||
|
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| errno = err; | ||
| } | ||
|
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| int mount_detached_fs(const char *fsname) | ||
| { | ||
| int fsfd, fd; | ||
|
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| fsfd = cr_fsopen(fsname, 0); | ||
| if (fsfd < 0) { | ||
| pr_perror("Unable to open the %s file system", fsname); | ||
| return -1; | ||
| } | ||
|
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| if (cr_fsconfig(fsfd, FSCONFIG_CMD_CREATE, NULL, NULL, 0) < 0) { | ||
| pr_perror("Unable to create the %s file system", fsname); | ||
| close(fsfd); | ||
| return -1; | ||
| } | ||
|
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| fd = cr_fsmount(fsfd, 0, 0); | ||
| if (fd < 0) | ||
| pr_perror("Unable to mount the %s file system", fsname); | ||
| close(fsfd); | ||
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||
