[SCM] Samba Shared Repository - branch master updated -
d38bffd4126062b92384f0930196059441a2d765
Tim Prouty
tprouty at samba.org
Wed Nov 12 17:50:54 GMT 2008
The branch, master has been updated
via d38bffd4126062b92384f0930196059441a2d765 (commit)
from 7f36d3b55051150b9d4fa75af424898f48c48771 (commit)
http://gitweb.samba.org/?p=samba.git;a=shortlog;h=master
- Log -----------------------------------------------------------------
commit d38bffd4126062b92384f0930196059441a2d765
Author: Tim Prouty <tprouty at samba.org>
Date: Wed Nov 5 13:40:03 2008 -0800
s3: Add support for storing dos attributes as st_flags in the stat struct.
Some filesystems have support for storing dos attributes directly in
the inode's st_flags and accessing them through the stat struct. This
patch:
- Adds a configure check to see if the special flags are available.
- Implements getting and setting dos attributes in the stat struct and
inode, respectively.
This will not change the existing functionality of any system that
doesn't have the special flags available.
-----------------------------------------------------------------------
Summary of changes:
source3/configure.in | 19 ++++++
source3/smbd/dosmode.c | 160 ++++++++++++++++++++++++++++++++++++++++++++----
2 files changed, 166 insertions(+), 13 deletions(-)
Changeset truncated at 500 lines:
diff --git a/source3/configure.in b/source3/configure.in
index 5e3eac5..24341e0 100644
--- a/source3/configure.in
+++ b/source3/configure.in
@@ -1433,6 +1433,25 @@ if test x"$samba_cv_stat_st_birthtime" = x"yes" ; then
AC_DEFINE(HAVE_STAT_ST_BIRTHTIME, 1, [whether struct stat contains st_birthtime])
fi
+AC_CACHE_CHECK([whether there is DOS flags support in the stat struct], samba_cv_stat_dos_flags,
+ [
+ AC_TRY_COMPILE(
+ [#include <sys/stat.h>],
+ [
+ int a = UF_DOS_ARCHIVE;
+ int h = UF_DOS_HIDDEN;
+ int r = UF_DOS_RO;
+ int s = UF_DOS_SYSTEM;
+ int i = UF_DOS_NOINDEX;
+ int f = UF_DOS_FLAGS;
+ ],
+ samba_cv_stat_dos_flags=yes, samba_cv_stat_dos_flags=no)
+ ])
+
+if test x"$samba_cv_stat_dos_flags" = x"yes" ; then
+ AC_DEFINE(HAVE_STAT_DOS_FLAGS, 1, [whether there is DOS flags support in the stat struct])
+fi
+
#####################################
# needed for SRV lookups
AC_CHECK_LIB(resolv, dn_expand)
diff --git a/source3/smbd/dosmode.c b/source3/smbd/dosmode.c
index 784b36d..954cd5a 100644
--- a/source3/smbd/dosmode.c
+++ b/source3/smbd/dosmode.c
@@ -30,6 +30,17 @@ static int set_sparse_flag(const SMB_STRUCT_STAT * const sbuf)
return 0;
}
+static int set_link_read_only_flag(const SMB_STRUCT_STAT *const sbuf)
+{
+#ifdef S_ISLNK
+#if LINKS_READ_ONLY
+ if (S_ISLNK(sbuf->st_mode) && S_ISDIR(sbuf->st_mode))
+ return aRONLY;
+#endif
+#endif
+ return 0;
+}
+
/****************************************************************************
Change a dos mode to a unix mode.
Base permission for files:
@@ -159,13 +170,7 @@ static uint32 dos_mode_from_sbuf(connection_struct *conn, const char *path, SMB_
result = aDIR | (result & aRONLY);
result |= set_sparse_flag(sbuf);
-
-#ifdef S_ISLNK
-#if LINKS_READ_ONLY
- if (S_ISLNK(sbuf->st_mode) && S_ISDIR(sbuf->st_mode))
- result |= aRONLY;
-#endif
-#endif
+ result |= set_link_read_only_flag(sbuf);
DEBUG(8,("dos_mode_from_sbuf returning "));
@@ -343,6 +348,113 @@ uint32 dos_mode_msdfs(connection_struct *conn, const char *path,SMB_STRUCT_STAT
return(result);
}
+#ifdef HAVE_STAT_DOS_FLAGS
+/****************************************************************************
+ Convert dos attributes (FILE_ATTRIBUTE_*) to dos stat flags (UF_*)
+****************************************************************************/
+
+static int dos_attributes_to_stat_dos_flags(uint32_t dosmode)
+{
+ uint32_t dos_stat_flags = 0;
+
+ if (dosmode & aARCH)
+ dos_stat_flags |= UF_DOS_ARCHIVE;
+ if (dosmode & aHIDDEN)
+ dos_stat_flags |= UF_DOS_HIDDEN;
+ if (dosmode & aRONLY)
+ dos_stat_flags |= UF_DOS_RO;
+ if (dosmode & aSYSTEM)
+ dos_stat_flags |= UF_DOS_SYSTEM;
+ if (dosmode & FILE_ATTRIBUTE_NONINDEXED)
+ dos_stat_flags |= UF_DOS_NOINDEX;
+
+ return dos_stat_flags;
+}
+
+/****************************************************************************
+ Gets DOS attributes, accessed via st_flags in the stat struct.
+****************************************************************************/
+
+static bool get_stat_dos_flags(connection_struct *conn,
+ const char *fname,
+ const SMB_STRUCT_STAT *sbuf,
+ uint32_t *dosmode)
+{
+ SMB_ASSERT(sbuf && VALID_STAT(*sbuf));
+ SMB_ASSERT(dosmode);
+
+ if (!lp_store_dos_attributes(SNUM(conn))) {
+ return false;
+ }
+
+ DEBUG(5, ("Getting stat dos attributes for %s.\n", fname));
+
+ if (sbuf->st_flags & UF_DOS_ARCHIVE)
+ *dosmode |= aARCH;
+ if (sbuf->st_flags & UF_DOS_HIDDEN)
+ *dosmode |= aHIDDEN;
+ if (sbuf->st_flags & UF_DOS_RO)
+ *dosmode |= aRONLY;
+ if (sbuf->st_flags & UF_DOS_SYSTEM)
+ *dosmode |= aSYSTEM;
+ if (sbuf->st_flags & UF_DOS_NOINDEX)
+ *dosmode |= FILE_ATTRIBUTE_NONINDEXED;
+ if (S_ISDIR(sbuf->st_mode))
+ *dosmode |= aDIR;
+
+ *dosmode |= set_sparse_flag(sbuf);
+ *dosmode |= set_link_read_only_flag(sbuf);
+
+ return true;
+}
+
+/****************************************************************************
+ Sets DOS attributes, stored in st_flags of the inode.
+****************************************************************************/
+
+static bool set_stat_dos_flags(connection_struct *conn,
+ const char *fname,
+ SMB_STRUCT_STAT *sbuf,
+ uint32_t dosmode,
+ bool *attributes_changed)
+{
+ uint32_t new_flags = 0;
+ int error = 0;
+
+ SMB_ASSERT(sbuf && VALID_STAT(*sbuf));
+ SMB_ASSERT(attributes_changed);
+
+ *attributes_changed = false;
+
+ if (!lp_store_dos_attributes(SNUM(conn))) {
+ return false;
+ }
+
+ DEBUG(5, ("Setting stat dos attributes for %s.\n", fname));
+
+ new_flags = (sbuf->st_flags & ~UF_DOS_FLAGS) |
+ dos_attributes_to_stat_dos_flags(dosmode);
+
+ /* Return early if no flags changed. */
+ if (new_flags == sbuf->st_flags)
+ return true;
+
+ DEBUG(5, ("Setting stat dos attributes=0x%x, prev=0x%x\n", new_flags,
+ sbuf->st_flags));
+
+ /* Set new flags with chflags. */
+ error = SMB_VFS_CHFLAGS(conn, fname, new_flags);
+ if (error) {
+ DEBUG(0, ("Failed setting new stat dos attributes (0x%x) on "
+ "file %s! errno=%d\n", new_flags, fname, errno));
+ return false;
+ }
+
+ *attributes_changed = true;
+ return true;
+}
+#endif /* HAVE_STAT_DOS_FLAGS */
+
/****************************************************************************
Change a unix mode to a dos mode.
****************************************************************************/
@@ -350,7 +462,7 @@ uint32 dos_mode_msdfs(connection_struct *conn, const char *path,SMB_STRUCT_STAT
uint32 dos_mode(connection_struct *conn, const char *path,SMB_STRUCT_STAT *sbuf)
{
uint32 result = 0;
- bool offline;
+ bool offline, used_stat_dos_flags = false;
DEBUG(8,("dos_mode: %s\n", path));
@@ -373,11 +485,16 @@ uint32 dos_mode(connection_struct *conn, const char *path,SMB_STRUCT_STAT *sbuf)
}
}
- /* Get the DOS attributes from an EA by preference. */
- if (get_ea_dos_attribute(conn, path, sbuf, &result)) {
- result |= set_sparse_flag(sbuf);
- } else {
- result |= dos_mode_from_sbuf(conn, path, sbuf);
+#ifdef HAVE_STAT_DOS_FLAGS
+ used_stat_dos_flags = get_stat_dos_flags(conn, path, sbuf, &result);
+#endif
+ if (!used_stat_dos_flags) {
+ /* Get the DOS attributes from an EA by preference. */
+ if (get_ea_dos_attribute(conn, path, sbuf, &result)) {
+ result |= set_sparse_flag(sbuf);
+ } else {
+ result |= dos_mode_from_sbuf(conn, path, sbuf);
+ }
}
@@ -468,6 +585,23 @@ int file_set_dosmode(connection_struct *conn, const char *fname,
return(0);
}
+#ifdef HAVE_STAT_DOS_FLAGS
+ {
+ bool attributes_changed;
+
+ if (set_stat_dos_flags(conn, fname, st, dosmode,
+ &attributes_changed))
+ {
+ if (!newfile && attributes_changed) {
+ notify_fname(conn, NOTIFY_ACTION_MODIFIED,
+ FILE_NOTIFY_CHANGE_ATTRIBUTES, fname);
+ }
+ st->st_mode = unixmode;
+ return 0;
+ }
+ }
+#endif
+
/* Store the DOS attributes in an EA by preference. */
if (set_ea_dos_attribute(conn, fname, st, dosmode)) {
if (!newfile) {
--
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