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* fhandler.cc (fhandler_base::write): Don't attempt to sparsify
an already sparse file. Drop check for FILE_SUPPORTS_SPARSE_FILES flag. Explicitely set FILE_ATTRIBUTE_SPARSE_FILE attribute in cached attributes. (fhandler_base::lseek): Only set did_lseek if sparseness is supported. * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Don't attempt to sparsify an already sparse file. Explicitely set FILE_ATTRIBUTE_SPARSE_FILE attribute in cached attributes. * mount.cc (oopt): Add "sparse" flag. (fillout_mntent): Ditto. * path.h (enum path_types): Add PATH_SPARSE. (path_conv::support_sparse): New method. (path_conv::fs_flags): Constify. (path_conv::fs_name_len): Ditto. include/sys/mount.h: Replace unused MOUNT_MIXED flag with MOUNT_SPARSE.
This commit is contained in:
Corinna Vinschen
parent
60f901f4a9
commit
05297cca5f
@ -1,3 +1,21 @@
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2012-12-14 Corinna Vinschen <corinna@vinschen.de>
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* fhandler.cc (fhandler_base::write): Don't attempt to sparsify
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an already sparse file. Drop check for FILE_SUPPORTS_SPARSE_FILES
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flag. Explicitely set FILE_ATTRIBUTE_SPARSE_FILE attribute in
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cached attributes.
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(fhandler_base::lseek): Only set did_lseek if sparseness is supported.
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* fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Don't attempt
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to sparsify an already sparse file. Explicitely set
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FILE_ATTRIBUTE_SPARSE_FILE attribute in cached attributes.
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* mount.cc (oopt): Add "sparse" flag.
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(fillout_mntent): Ditto.
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* path.h (enum path_types): Add PATH_SPARSE.
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(path_conv::support_sparse): New method.
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(path_conv::fs_flags): Constify.
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(path_conv::fs_name_len): Ditto.
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include/sys/mount.h: Replace unused MOUNT_MIXED flag with MOUNT_SPARSE.
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2012-12-10 Christopher Faylor <me.cygwin2012@cgf.cx>
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* sigproc.h (sig_send): Accept tid as argument #3. Default to NULL.
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@ -817,15 +817,17 @@ ssize_t __stdcall
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fhandler_base::write (const void *ptr, size_t len)
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{
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int res;
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IO_STATUS_BLOCK io;
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FILE_POSITION_INFORMATION fpi;
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FILE_STANDARD_INFORMATION fsi;
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if (did_lseek ())
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{
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IO_STATUS_BLOCK io;
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FILE_POSITION_INFORMATION fpi;
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FILE_STANDARD_INFORMATION fsi;
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did_lseek (false); /* don't do it again */
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if (!(get_flags () & O_APPEND)
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&& !has_attribute (FILE_ATTRIBUTE_SPARSE_FILE)
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&& NT_SUCCESS (NtQueryInformationFile (get_output_handle (),
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&io, &fsi, sizeof fsi,
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FileStandardInformation))
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@ -833,8 +835,7 @@ fhandler_base::write (const void *ptr, size_t len)
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&io, &fpi, sizeof fpi,
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FilePositionInformation))
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&& fpi.CurrentByteOffset.QuadPart
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>= fsi.EndOfFile.QuadPart + (128 * 1024)
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&& (pc.fs_flags () & FILE_SUPPORTS_SPARSE_FILES))
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>= fsi.EndOfFile.QuadPart + (128 * 1024))
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{
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/* If the file system supports sparse files and the application
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is writing after a long seek beyond EOF, convert the file to
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@ -842,6 +843,9 @@ fhandler_base::write (const void *ptr, size_t len)
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NTSTATUS status;
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status = NtFsControlFile (get_output_handle (), NULL, NULL, NULL,
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&io, FSCTL_SET_SPARSE, NULL, 0, NULL, 0);
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if (NT_SUCCESS (status))
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pc.file_attributes (pc.file_attributes ()
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| FILE_ATTRIBUTE_SPARSE_FILE);
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debug_printf ("%p = NtFsControlFile(%S, FSCTL_SET_SPARSE)",
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status, pc.get_nt_native_path ());
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}
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@ -1071,7 +1075,8 @@ fhandler_base::lseek (_off64_t offset, int whence)
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/* When next we write(), we will check to see if *this* seek went beyond
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the end of the file and if so, potentially sparsify the file. */
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did_lseek (true);
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if (pc.support_sparse ())
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did_lseek (true);
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/* If this was a SEEK_CUR with offset 0, we still might have
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readahead that we have to take into account when calculating
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@ -1189,12 +1189,15 @@ fhandler_disk_file::ftruncate (_off64_t length, bool allow_truncate)
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feofi.EndOfFile.QuadPart = length;
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/* Create sparse files only when called through ftruncate, not when
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called through posix_fallocate. */
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if (allow_truncate
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&& (pc.fs_flags () & FILE_SUPPORTS_SPARSE_FILES)
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if (allow_truncate && pc.support_sparse ()
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&& !has_attribute (FILE_ATTRIBUTE_SPARSE_FILE)
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&& length >= fsi.EndOfFile.QuadPart + (128 * 1024))
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{
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status = NtFsControlFile (get_handle (), NULL, NULL, NULL, &io,
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FSCTL_SET_SPARSE, NULL, 0, NULL, 0);
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if (NT_SUCCESS (status))
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pc.file_attributes (pc.file_attributes ()
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| FILE_ATTRIBUTE_SPARSE_FILE);
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syscall_printf ("%p = NtFsControlFile(%S, FSCTL_SET_SPARSE)",
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status, pc.get_nt_native_path ());
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}
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@ -26,8 +26,8 @@ enum
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device mount */
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MOUNT_CYGWIN_EXEC = 0x00040, /* file or directory is or contains a
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cygwin executable */
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MOUNT_MIXED = 0x00080, /* reads are text, writes are binary
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not yet implemented */
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MOUNT_SPARSE = 0x00080, /* Support automatic sparsifying of
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files. */
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MOUNT_NOTEXEC = 0x00100, /* don't check files for executable magic */
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MOUNT_DEVFS = 0x00200, /* /device "filesystem" */
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MOUNT_PROC = 0x00400, /* /proc "filesystem" */
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@ -1028,6 +1028,7 @@ struct opt
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{"override", MOUNT_OVERRIDE, 0},
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{"posix=0", MOUNT_NOPOSIX, 0},
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{"posix=1", MOUNT_NOPOSIX, 1},
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{"sparse", MOUNT_SPARSE, 0},
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{"text", MOUNT_BINARY, 1},
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{"user", MOUNT_SYSTEM, 1}
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};
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@ -1667,6 +1668,9 @@ fillout_mntent (const char *native_path, const char *posix_path, unsigned flags)
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if (flags & MOUNT_NOPOSIX)
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strcat (_my_tls.locals.mnt_opts, (char *) ",posix=0");
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if (flags & MOUNT_SPARSE)
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strcat (_my_tls.locals.mnt_opts, (char *) ",sparse");
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if (!(flags & MOUNT_SYSTEM)) /* user mount */
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strcat (_my_tls.locals.mnt_opts, (char *) ",user");
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@ -70,6 +70,7 @@ enum path_types
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PATH_EXEC = MOUNT_EXEC,
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PATH_NOTEXEC = MOUNT_NOTEXEC,
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PATH_CYGWIN_EXEC = MOUNT_CYGWIN_EXEC,
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PATH_SPARSE = MOUNT_SPARSE,
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PATH_RO = MOUNT_RO,
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PATH_NOACL = MOUNT_NOACL,
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PATH_NOPOSIX = MOUNT_NOPOSIX,
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@ -153,6 +154,11 @@ class path_conv
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bool has_acls () const {return !(path_flags & PATH_NOACL) && fs.has_acls (); }
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bool hasgood_inode () const {return !(path_flags & PATH_IHASH); }
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bool isgood_inode (__ino64_t ino) const;
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bool support_sparse () const
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{
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return (path_flags & PATH_SPARSE)
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&& (fs_flags () & FILE_SUPPORTS_SPARSE_FILES);
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}
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int has_symlinks () const {return path_flags & PATH_HAS_SYMLINKS;}
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int has_dos_filenames_only () const {return path_flags & PATH_DOS;}
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int has_buggy_open () const {return fs.has_buggy_open ();}
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@ -342,8 +348,8 @@ class path_conv
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short get_unitn () const {return dev.get_minor ();}
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DWORD file_attributes () const {return fileattr;}
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void file_attributes (DWORD new_attr) {fileattr = new_attr;}
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DWORD fs_flags () {return fs.flags ();}
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DWORD fs_name_len () {return fs.name_len ();}
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DWORD fs_flags () const {return fs.flags ();}
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DWORD fs_name_len () const {return fs.name_len ();}
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bool fs_got_fs () const { return fs.got_fs (); }
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bool fs_is_fat () const {return fs.is_fat ();}
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bool fs_is_ntfs () const {return fs.is_ntfs ();}
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