Index: base/sys_info_posix.cc |
diff --git a/base/sys_info_posix.cc b/base/sys_info_posix.cc |
index 5d1c450139a575705c3c5046ed32c565e4b5e404..7db6fd15d3a3787530bc93b64c963a6a45c5fa00 100644 |
--- a/base/sys_info_posix.cc |
+++ b/base/sys_info_posix.cc |
@@ -28,6 +28,10 @@ |
#include <sys/statvfs.h> |
#endif |
+#if defined(OS_LINUX) |
+#include <linux/magic.h> |
+#endif |
+ |
namespace { |
#if !defined(OS_OPENBSD) |
@@ -73,6 +77,15 @@ base::LazyInstance< |
base::internal::LazySysInfoValue<int64_t, AmountOfVirtualMemory>>::Leaky |
g_lazy_virtual_memory = LAZY_INSTANCE_INITIALIZER; |
+#if defined(OS_LINUX) |
+bool IsStatsZeroIfUnlimited(unsigned long int fsid) { |
+ // On Linux, stats.f_blocks is 0 when memory based file system (like tmpfs, |
+ // ramfs, or hugetlbfs), is mounted without any size limit (i.e. size set to |
+ // 0). |
+ return fsid == TMPFS_MAGIC || fsid == HUGETLBFS_MAGIC || fsid == RAMFS_MAGIC; |
+} |
+#endif |
+ |
bool GetDiskSpaceInfo(const base::FilePath& path, |
int64_t* available_bytes, |
int64_t* total_bytes) { |
@@ -80,10 +93,26 @@ bool GetDiskSpaceInfo(const base::FilePath& path, |
if (HANDLE_EINTR(statvfs(path.value().c_str(), &stats)) != 0) |
return false; |
- if (available_bytes) |
- *available_bytes = static_cast<int64_t>(stats.f_bavail) * stats.f_frsize; |
- if (total_bytes) |
- *total_bytes = static_cast<int64_t>(stats.f_blocks) * stats.f_frsize; |
+#if defined(OS_LINUX) |
+ const bool zero_size_means_unlimited = |
+ stats.f_blocks == 0 && IsStatsZeroIfUnlimited(stats.f_fsid); |
Lei Zhang
2016/08/01 21:30:55
Are you sure f_fsid is the right field to check? L
Sriram
2016/08/02 00:03:24
You are right - I misunderstood the man page and f
|
+#else |
+ const bool zero_size_means_unlimited = false; |
+#endif |
+ |
+ if (available_bytes) { |
+ *available_bytes = |
+ zero_size_means_unlimited |
+ ? std::numeric_limits<int64_t>::max() |
+ : static_cast<int64_t>(stats.f_bavail) * stats.f_frsize; |
+ } |
+ |
+ if (total_bytes) { |
+ *total_bytes = zero_size_means_unlimited |
+ ? std::numeric_limits<int64_t>::max() |
+ : static_cast<int64_t>(stats.f_blocks) * stats.f_frsize; |
+ } |
+ |
return true; |
} |