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0c927d912c
attributes (streams, EAs, NT ACLs, timestamps etc) to be used on filesystems that don't support xattrs. It also allows for large streams, although they are very inefficient. I won't enable this by default, as I really wrote it as a way of testing large stream support while still using ext3, but perhaps with a bit more work this could be generally usable. To enable this use: posix:eadb = /home/test/myeas.tdb
135 lines
3.0 KiB
C
135 lines
3.0 KiB
C
/*
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Unix SMB/CIFS implementation.
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POSIX NTVFS backend - xattr support using filesystem xattrs
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Copyright (C) Andrew Tridgell 2004
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#include "system/filesys.h"
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#include "vfs_posix.h"
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/*
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pull a xattr as a blob, from either a file or a file descriptor
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*/
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NTSTATUS pull_xattr_blob_system(struct pvfs_state *pvfs,
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TALLOC_CTX *mem_ctx,
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const char *attr_name,
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const char *fname,
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int fd,
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size_t estimated_size,
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DATA_BLOB *blob)
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{
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#if HAVE_XATTR_SUPPORT
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int ret;
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*blob = data_blob_talloc(mem_ctx, NULL, estimated_size);
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if (blob->data == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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again:
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if (fd != -1) {
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ret = fgetxattr(fd, attr_name, blob->data, estimated_size);
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} else {
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ret = getxattr(fname, attr_name, blob->data, estimated_size);
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}
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if (ret == -1 && errno == ERANGE) {
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estimated_size *= 2;
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blob->data = talloc_realloc(mem_ctx, blob->data, estimated_size);
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if (blob->data == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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blob->length = estimated_size;
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goto again;
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}
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if (ret == -1) {
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data_blob_free(blob);
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return pvfs_map_errno(pvfs, errno);
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}
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blob->length = ret;
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return NT_STATUS_OK;
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#else
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return NT_STATUS_NOT_SUPPORTED;
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#endif
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}
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/*
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push a xattr as a blob, from either a file or a file descriptor
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*/
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NTSTATUS push_xattr_blob_system(struct pvfs_state *pvfs,
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const char *attr_name,
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const char *fname,
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int fd,
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const DATA_BLOB *blob)
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{
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#if HAVE_XATTR_SUPPORT
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int ret;
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if (fd != -1) {
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ret = fsetxattr(fd, attr_name, blob->data, blob->length, 0);
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} else {
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ret = setxattr(fname, attr_name, blob->data, blob->length, 0);
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}
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if (ret == -1) {
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return pvfs_map_errno(pvfs, errno);
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}
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return NT_STATUS_OK;
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#else
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return NT_STATUS_NOT_SUPPORTED;
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#endif
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}
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/*
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delete a xattr
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*/
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NTSTATUS delete_xattr_system(struct pvfs_state *pvfs, const char *attr_name,
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const char *fname, int fd)
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{
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#if HAVE_XATTR_SUPPORT
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int ret;
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if (fd != -1) {
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ret = fremovexattr(fd, attr_name);
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} else {
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ret = removexattr(fname, attr_name);
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}
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if (ret == -1) {
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return pvfs_map_errno(pvfs, errno);
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}
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return NT_STATUS_OK;
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#else
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return NT_STATUS_NOT_SUPPORTED;
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#endif
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}
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/*
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unlink a file - cleanup any xattrs
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*/
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NTSTATUS unlink_xattr_system(struct pvfs_state *pvfs, const char *fname)
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{
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/* nothing needs to be done for filesystem based xattrs */
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return NT_STATUS_OK;
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}
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