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* fhandler_disk_file.cc (path_conv::isgood_inode): Rearrange, take 

Samba versions >= 3.5.4 into account, add comments.
This commit is contained in:
Corinna Vinschen 2012-05-21 12:00:09 +00:00
parent bb39d14401
commit ece05938f2
2 changed files with 25 additions and 5 deletions
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5
winsup/cygwin/ChangeLog
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@ -1,3 +1,8 @@
2012-05-21 Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (path_conv::isgood_inode): Rearrange, take
Samba versions >= 3.5.4 into account, add comments.
2012-05-16 Christopher Faylor <me.cygwin2012@cgf.cx>
* DevNotes: Add entry cgf-000009.

25
winsup/cygwin/fhandler_disk_file.cc
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@ -154,11 +154,26 @@ public:
inline bool
path_conv::isgood_inode (__ino64_t ino) const
{
/* We can't trust remote inode numbers of only 32 bit. That means,
remote NT4 NTFS, as well as shares of Samba version < 3.0.
The known exception are SFU NFS shares, which return the valid 32 bit
inode number from the remote file system unchanged. */
return hasgood_inode () && (ino > UINT32_MAX || !isremote () || fs_is_nfs ());
/* If the FS doesn't support nonambiguous inode numbers anyway, bail out
immediately. */
if (!hasgood_inode ())
return false;
/* If the inode numbers are 64 bit numbers or if it's a local FS, they
are to be trusted. */
if (ino > UINT32_MAX || !isremote ())
return true;
/* The inode numbers returned from a remote NT4 NTFS are ephemeral
32 bit numbers. */
if (fs_is_ntfs ())
return false;
/* Starting with version 3.5.4, Samba returns the real inode numbers, if
the file is on the same device as the root of the share (Samba function
get_FileIndex). 32 bit inode numbers returned by older versions (likely
< 3.0) are ephemeral. */
if (fs_is_samba () && fs.samba_version () < 0x03050400)
return false;
/* Otherwise, trust the inode numbers unless proved otherwise. */
return true;
}
/* Check reparse point for type. IO_REPARSE_TAG_MOUNT_POINT types are