diff options
Diffstat (limited to 'source4/ntvfs/posix/xattr_system.c')
-rw-r--r-- | source4/ntvfs/posix/xattr_system.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/source4/ntvfs/posix/xattr_system.c b/source4/ntvfs/posix/xattr_system.c new file mode 100644 index 0000000000..c86ee0bd87 --- /dev/null +++ b/source4/ntvfs/posix/xattr_system.c @@ -0,0 +1,134 @@ +/* + Unix SMB/CIFS implementation. + + POSIX NTVFS backend - xattr support using filesystem xattrs + + Copyright (C) Andrew Tridgell 2004 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" +#include "system/filesys.h" +#include "vfs_posix.h" + +/* + pull a xattr as a blob, from either a file or a file descriptor +*/ +NTSTATUS pull_xattr_blob_system(struct pvfs_state *pvfs, + TALLOC_CTX *mem_ctx, + const char *attr_name, + const char *fname, + int fd, + size_t estimated_size, + DATA_BLOB *blob) +{ +#if HAVE_XATTR_SUPPORT + int ret; + + *blob = data_blob_talloc(mem_ctx, NULL, estimated_size); + if (blob->data == NULL) { + return NT_STATUS_NO_MEMORY; + } + +again: + if (fd != -1) { + ret = fgetxattr(fd, attr_name, blob->data, estimated_size); + } else { + ret = getxattr(fname, attr_name, blob->data, estimated_size); + } + if (ret == -1 && errno == ERANGE) { + estimated_size *= 2; + blob->data = talloc_realloc(mem_ctx, blob->data, estimated_size); + if (blob->data == NULL) { + return NT_STATUS_NO_MEMORY; + } + blob->length = estimated_size; + goto again; + } + + if (ret == -1) { + data_blob_free(blob); + return pvfs_map_errno(pvfs, errno); + } + + blob->length = ret; + + return NT_STATUS_OK; +#else + return NT_STATUS_NOT_SUPPORTED; +#endif +} + +/* + push a xattr as a blob, from either a file or a file descriptor +*/ +NTSTATUS push_xattr_blob_system(struct pvfs_state *pvfs, + const char *attr_name, + const char *fname, + int fd, + const DATA_BLOB *blob) +{ +#if HAVE_XATTR_SUPPORT + int ret; + + if (fd != -1) { + ret = fsetxattr(fd, attr_name, blob->data, blob->length, 0); + } else { + ret = setxattr(fname, attr_name, blob->data, blob->length, 0); + } + if (ret == -1) { + return pvfs_map_errno(pvfs, errno); + } + + return NT_STATUS_OK; +#else + return NT_STATUS_NOT_SUPPORTED; +#endif +} + + +/* + delete a xattr +*/ +NTSTATUS delete_xattr_system(struct pvfs_state *pvfs, const char *attr_name, + const char *fname, int fd) +{ +#if HAVE_XATTR_SUPPORT + int ret; + + if (fd != -1) { + ret = fremovexattr(fd, attr_name); + } else { + ret = removexattr(fname, attr_name); + } + if (ret == -1) { + return pvfs_map_errno(pvfs, errno); + } + + return NT_STATUS_OK; +#else + return NT_STATUS_NOT_SUPPORTED; +#endif +} + +/* + unlink a file - cleanup any xattrs +*/ +NTSTATUS unlink_xattr_system(struct pvfs_state *pvfs, const char *fname) +{ + /* nothing needs to be done for filesystem based xattrs */ + return NT_STATUS_OK; +} |