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Retry mounts on -EAGAIN

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F2fs may return -EAGAIN on mounting with checkpoint=disable. This
signals that the required garbage collection was taking a while, and
that more garbage collection is required, and will be resumed by
attempting to mount again.

Test: Start device with checkpointing set up with an f2fs userdata
      partition that is in need of heavy garbage collection.
      Mount should fail with EAGAIN and retry
Bug: 122917966

Change-Id: I83341f68e5cffa5f1bd569dfb2037ad5d3cbd7a3
This commit is contained in:
Daniel Rosenberg 2019-01-16 16:28:21 -08:00
parent 97212d36da
commit 5620c6ce0c
1 changed files with 10 additions and 2 deletions
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12
fs_mgr/fs_mgr.cpp
View file

@ -556,9 +556,17 @@ static int __mount(const std::string& source, const std::string& target, const F
mkdir(target.c_str(), 0755);
errno = 0;
unsigned long mountflags = entry.flags;
int ret = mount(source.c_str(), target.c_str(), entry.fs_type.c_str(), mountflags,
int ret = 0;
int save_errno = 0;
do {
if (save_errno == EAGAIN) {
PINFO << "Retrying mount (source=" << source << ",target=" << target
<< ",type=" << entry.fs_type << ")=" << ret << "(" << save_errno << ")";
}
ret = mount(source.c_str(), target.c_str(), entry.fs_type.c_str(), mountflags,
entry.fs_options.c_str());
int save_errno = errno;
save_errno = errno;
} while (ret && save_errno == EAGAIN);
const char* target_missing = "";
const char* source_missing = "";
if (save_errno == ENOENT) {