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VFS: catch Out_of_ram and Out_of_cap exceptions

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Catch out of RAM and capability exceptions and return error values.
Abort opening a composite directory at Dir_file_system where an
opendir call on any child file-system returns an OUT_OF_RAM or
OUT_OF_CAPS error.

Ref #2642
This commit is contained in:
Emery Hemingway
2018-01-12 13:47:48 -06:00
committed by Norman Feske
parent c34a4bfdb4
commit c7d0accac0
14 changed files with 194 additions and 80 deletions
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10
repos/os/src/lib/vfs/rtc_file_system.h
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@ -109,9 +109,13 @@ class Vfs::Rtc_file_system : public Single_file_system
if (!_single_file(path))
return OPEN_ERR_UNACCESSIBLE;
*out_handle = new (alloc) Rtc_vfs_handle(*this, *this, alloc,
_rtc);
return OPEN_OK;
try {
*out_handle = new (alloc)
Rtc_vfs_handle(*this, *this, alloc, _rtc);
return OPEN_OK;
}
catch (Genode::Out_of_ram) { return OPEN_ERR_OUT_OF_RAM; }
catch (Genode::Out_of_caps) { return OPEN_ERR_OUT_OF_CAPS; }
}
Stat_result stat(char const *path, Stat &out) override