diff options
author | Corinna Vinschen <corinna@vinschen.de> | 2008-03-31 22:03:25 +0400 |
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committer | Corinna Vinschen <corinna@vinschen.de> | 2008-03-31 22:03:25 +0400 |
commit | 636c94d8539476b691bdfff748282027a970725b (patch) | |
tree | 4e29da5030de9dee6ed9d18d867af6d68284179b /winsup/cygwin/fhandler.cc | |
parent | 07e2a8f3768a13eb9a28d06054ffc89d00703c16 (diff) |
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'.
Revamp advisory file locking to avoid cross reference pointers as well
as to allow BSD flock semantics. More agressively delete unused nodes
and sync objects.
* fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment.
(fhandler_base::node): Remove.
(fhandler_base::unique_id): Add.
(fhandler_base::del_my_locks): New method.
(get_ino): Rename from get_namehash. Change usage throughout Cygwin.
(get_unique_id): New method.
* fhandler.cc (fhandler_base::close): Call own del_my_locks method.
Fix comment.
(fhandler_base::fhandler_base): Accommodate new and changed members.
(fhandler_base::fixup_after_fork): Call del_my_locks.
(fhandler_base::fixup_after_exec): Ditto for files with close-on-exec
flag set.
* fhandler_disk_file.cc (get_ino_by_handle): Rename from
readdir_get_ino_by_handle. Accommodate throughout.
(fhandler_base::open_fs): Fill ino with inode number if FS has good
inodes. Allocate a LUID and store in unique_id to recognize file
descriptors referencing the same file object.
* flock.cc: Drop flock TODO comments. Use explicit types __dev32_t
and __ino64_t instead of dev_t and ino_t.
(LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length.
(get_obj_handle_count): New method.
(lockf_t::lf_id): Change type to long long.
(inode_t::get_lock_obj_handle_count): Drop in favor of static function
get_obj_handle_count.
(inode_t::del_locks): Remove.
(inode_t::get): Add create_if_missing flag argument.
(inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock
locks. Return if node can be deleted or not.
(inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx.
(fixup_lockf_after_fork): Remove.
(fhandler_base::del_my_locks): New method.
(fixup_lockf_after_exec): Check if node can be deleted.
(inode_t::get): Only create node if create_if_missing is set. Lock
the returned node here before unlocking the node list.
(inode_t::get_all_locks_list): Accommodate new lf_id length.
(inode_t::create_lock_obj): Ditto.
(lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const.
Set lf_obj instead of returning a handle.
(lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters
allow it. Explain how it's supposed to work.
(fhandler_disk_file::lock): Only fetch file length in SEEK_END case.
Use NtQueryInformationFile(FileStandardInformation) instead of
calling fstat_by_handle. Always unlock node before returning.
Use fhandler's unique id to create lf_id for BSD flock locks.
Rely on node lock from inode_t::get. Call del_lock_obj on removed
locks here to allow explicit unlocking. Delete node if no lock exists
on the file anymore.
(lf_setlock): Get file handle as additional parameter. Handle the fact
that lf_getblock now always opens the attached event object. Reactivate
erroneously applied patch which deactivates setting thread priority.
Additionally handle blocking on BSD flock locks.
(lf_clearlock): Get file handle as additional parameter.
(lf_getlock): Close event handle opened by lf_getblock.
(lf_getblock): Open potentially blocking event object here and check
its signal state if it's a BSD flock lock.
(lf_wakelock): Get file handle as additional parameter.
* fork.cc (frok::child): Drop call to fixup_lockf_after_fork.
* ntdll.h (struct _EVENT_BASIC_INFORMATION): Define.
(enum _EVENT_INFORMATION_CLASS): Define.
(NtQueryEvent): Declare.
* fhandler.h (fhandler_base::fs_flags): Remove.
(fhandler_base::set_fs_flags): Remove.
(fhandler_base::get_fs_flags): Remove.
* fhandler.cc (fhandler_base::write): Check for sparse file using
pc.fs_flags().
* fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto.
The return of the volume serial number in fs_info.
* fhandler.h (get_dev): New method.
* fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to
NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use
get_dev() method.
* fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number
to generate fifo name.
* path.h (fs_info::sernum): New member.
(fs_info::serial_number): New method.
(path_conv::fs_serial_number): New method.
* path.cc (fs_info::update): Fetch volume serial number and store in
sernum.
Diffstat (limited to 'winsup/cygwin/fhandler.cc')
-rw-r--r-- | winsup/cygwin/fhandler.cc | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc index 22afb63ac..8513ab347 100644 --- a/winsup/cygwin/fhandler.cc +++ b/winsup/cygwin/fhandler.cc @@ -736,7 +736,7 @@ fhandler_base::write (const void *ptr, size_t len) FilePositionInformation)) && fpi.CurrentByteOffset.QuadPart >= fsi.EndOfFile.QuadPart + (128 * 1024) - && get_fs_flags (FILE_SUPPORTS_SPARSE_FILES)) + && (pc.fs_flags () & FILE_SUPPORTS_SPARSE_FILES)) { /* If the file system supports sparse files and the application is writing after a long seek beyond EOF, convert the file to @@ -1004,13 +1004,13 @@ fhandler_base::pwrite (void *, size_t, _off64_t) int fhandler_base::close () { - extern void del_my_locks (inode_t *); int res = -1; syscall_printf ("closing '%s' handle %p", get_name (), get_handle ()); - /* Delete all POSIX locks on the file. */ - if (node) - del_my_locks (node); + /* Delete all POSIX locks on the file. Delete all flock locks on the + file if this is the last reference to this file. */ + if (unique_id) + del_my_locks (false); if (nohandle () || CloseHandle (get_handle ())) res = 0; else @@ -1261,15 +1261,14 @@ fhandler_base::fhandler_base () : open_status (), access (0), io_handle (NULL), - namehash (0), + ino (0), openflags (0), rabuf (NULL), ralen (0), raixget (0), raixput (0), rabuflen (0), - node (NULL), - fs_flags (0), + unique_id (0), archetype (NULL), usecount (0) { @@ -1340,10 +1339,9 @@ fhandler_base::fixup_after_fork (HANDLE parent) fork_fixup (parent, io_handle, "io_handle"); if (get_overlapped ()) setup_overlapped (); - /* POSIX locks are not inherited across fork. The lock structures - are deleted globally in fixup_lockf_after_fork. Here we just - have to reset the pointer. */ - node = NULL; + /* POSIX locks are not inherited across fork. */ + if (unique_id) + del_my_locks (true); } void @@ -1352,6 +1350,8 @@ fhandler_base::fixup_after_exec () debug_printf ("here for '%s'", get_name ()); if (get_overlapped ()) setup_overlapped (); + if (unique_id && close_on_exec ()) + del_my_locks (false); } bool |