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* fhandler_disk_file.cc (fhandler_disk_file::opendir): Don't try to 

use FileIdBothDirectoryInformation on NFS shares.  Fix comment to
	explain why.
	* path.cc (symlink_info::check): Reinstantiate no_ea.  Use in
	erroneously changed condition.
This commit is contained in:
Corinna Vinschen 2008-05-23 17:22:18 +00:00
parent e765b3c0ad
commit 6afd630106
3 changed files with 25 additions and 14 deletions
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12
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,11 @@
2008-05-23 Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (fhandler_disk_file::opendir): Don't try to
use FileIdBothDirectoryInformation on NFS shares. Fix comment to
explain why.
* path.cc (symlink_info::check): Reinstantiate no_ea. Use in
erroneously changed condition.
2008-05-23 Christopher Faylor <me+cygwin@cgf.cx>
* mount.cc (find_root_from_cygwin_dll): New function factored from
@ -19,7 +27,7 @@
* path.cc (symlink_info::check): Remove unused variable.
2008-05-22 Corinna Vinschen <corinna@vinschen.de>
2008-05-23 Corinna Vinschen <corinna@vinschen.de>
* shared.cc (open_shared): Fix comments. Fix a condition which has
been overlooked to revert to its old state in change from 2008-04-18.
@ -30,7 +38,7 @@
loop. Set to NULL on first STATUS_EAS_NOT_SUPPORTED. Align comments.
Fix formatting.
2008-05-22 Corinna Vinschen <corinna@vinschen.de>
2008-05-23 Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (fhandler_disk_file::readdir): Eliminate
compiler warning.

18
winsup/cygwin/fhandler_disk_file.cc
View File

@ -1569,19 +1569,21 @@ fhandler_disk_file::opendir (int fd)
FileIdBothDirectoryInformation only on filesystems supporting
persistent ACLs, FileDirectoryInformation otherwise.
On older NFS clients (up to SFU 3.5), dangling symlinks
are hidden from directory queries, unless you use the
FileNamesInformation info class. Nevertheless, we try
FileIdBothDirectoryInformation first. On newer NFS clients
it works fine, on the older ones it returns "invalid info
class". So we can stick to the above explained mechanism. */
NFS clients hide dangling symlinks from directory queries,
unless you use the FileNamesInformation info class.
On newer NFS clients (>=Vista) FileIdBothDirectoryInformation
works fine, but only if the NFS share is mounted to a drive
letter. TODO: We don't test that here for now, but it might
be worth to test if there's a speed gain in using
FileIdBothDirectoryInformation, because it doesn't require to
open the file to read the inode number. */
if (pc.hasgood_inode ())
{
dir->__flags |= dirent_set_d_ino;
if (wincap.has_fileid_dirinfo ())
dir->__flags |= dirent_get_d_ino;
if (pc.fs_is_nfs ())
dir->__flags |= dirent_nfs_d_ino;
else if (wincap.has_fileid_dirinfo ())
dir->__flags |= dirent_get_d_ino;
}
}
if (fd >= 0)

9
winsup/cygwin/path.cc
View File

@ -2342,7 +2342,7 @@ symlink_info::check (char *path, const suffix_info *suffixes, unsigned opt,
tp.u_get (&upath);
InitializeObjectAttributes (&attr, &upath, OBJ_CASE_INSENSITIVE, NULL, NULL);
void *eabuf = &nfs_aol_ffei;
PVOID eabuf = &nfs_aol_ffei;
ULONG easize = sizeof nfs_aol_ffei;
while (suffix.next ())
@ -2350,6 +2350,7 @@ symlink_info::check (char *path, const suffix_info *suffixes, unsigned opt,
FILE_BASIC_INFORMATION fbi;
NTSTATUS status;
IO_STATUS_BLOCK io;
bool no_ea = false;
error = 0;
get_nt_native_path (suffix.path, upath, pflags & MOUNT_ENC);
@ -2373,6 +2374,7 @@ symlink_info::check (char *path, const suffix_info *suffixes, unsigned opt,
/* No right to access EAs or EAs not supported? */
if (status == STATUS_ACCESS_DENIED || status == STATUS_EAS_NOT_SUPPORTED)
{
no_ea = true;
/* If EAs are not supported, there's no sense to check them again
whith suffixes attached. So we set eabuf/easize to 0 here once. */
if (status == STATUS_EAS_NOT_SUPPORTED)
@ -2380,8 +2382,7 @@ symlink_info::check (char *path, const suffix_info *suffixes, unsigned opt,
eabuf = NULL;
easize = 0;
}
status = NtCreateFile (&h,
READ_CONTROL | FILE_READ_ATTRIBUTES,
status = NtCreateFile (&h, READ_CONTROL | FILE_READ_ATTRIBUTES,
&attr, &io, NULL, FILE_ATTRIBUTE_NORMAL,
FILE_SHARE_VALID_FLAGS, FILE_OPEN,
FILE_OPEN_REPARSE_POINT
@ -2526,7 +2527,7 @@ symlink_info::check (char *path, const suffix_info *suffixes, unsigned opt,
/* If the file could be opened with FILE_READ_EA, and if it's on a
NFS share, check if it's a symlink. Only files can be symlinks
(which can be symlinks to directories). */
else if (!eabuf && !(fileattr & FILE_ATTRIBUTE_DIRECTORY) && fs.is_nfs ())
else if (!no_ea && !(fileattr & FILE_ATTRIBUTE_DIRECTORY) && fs.is_nfs ())
{
res = check_nfs_symlink (h);
if (!res)