[CIFS] Don't request too much permission when reading an ACL
We were requesting GENERIC_READ but that fails when we do not have
read permission on the file (even if we could read the ACL).
Also move the dump access control entry code into debug ifdef.
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 629b96c..f1215df 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -162,7 +162,8 @@
}
-static void parse_ace(struct cifs_ace *pace, char *end_of_acl)
+#ifdef CONFIG_CIFS_DEBUG2
+static void dump_ace(struct cifs_ace *pace, char *end_of_acl)
{
int num_subauth;
@@ -180,7 +181,6 @@
num_subauth = pace->sid.num_subauth;
if (num_subauth) {
-#ifdef CONFIG_CIFS_DEBUG2
int i;
cFYI(1, ("ACE revision %d num_auth %d type %d flags %d size %d",
pace->sid.revision, pace->sid.num_subauth, pace->type,
@@ -192,11 +192,11 @@
/* BB add length check to make sure that we do not have huge
num auths and therefore go off the end */
-#endif
}
return;
}
+#endif
static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
@@ -240,9 +240,9 @@
for (i = 0; i < num_aces; ++i) {
ppace[i] = (struct cifs_ace *) (acl_base + acl_size);
-
- parse_ace(ppace[i], end_of_acl);
-
+#ifdef CONFIG_CIFS_DEBUG2
+ dump_ace(ppace[i], end_of_acl);
+#endif
if (compare_sids(&(ppace[i]->sid), pownersid))
access_flags_to_mode(ppace[i]->access_req,
&(inode->i_mode), S_IRWXU);
@@ -385,7 +385,7 @@
int oplock = FALSE;
/* open file */
rc = CIFSSMBOpen(xid, cifs_sb->tcon, path, FILE_OPEN,
- GENERIC_READ, 0, &fid, &oplock, NULL,
+ READ_CONTROL, 0, &fid, &oplock, NULL,
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
if (rc != 0) {
@@ -409,4 +409,22 @@
FreeXid(xid);
return;
}
+
+int mode_to_acl(struct inode *inode, const char *path)
+{
+ int rc = 0;
+ __u32 acllen = 0;
+ struct cifs_ntsd *pntsd = NULL;
+
+ cFYI(1, ("set ACL from mode for %s", path));
+
+ /* Get the security descriptor */
+
+ /* Add/Modify the three ACEs for owner, group, everyone */
+
+ /* Set the security descriptor */
+ kfree(pntsd);
+
+ return rc;
+}
#endif /* CONFIG_CIFS_EXPERIMENTAL */
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index c41ff74..07464b6 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -220,6 +220,23 @@
| FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES)
#define FILE_EXEC_RIGHTS (FILE_EXECUTE)
+#define SET_FILE_READ_RIGHTS (FILE_READ_DATA | FILE_READ_EA | FILE_WRITE_EA \
+ | FILE_READ_ATTRIBUTES \
+ | FILE_WRITE_ATTRIBUTES \
+ | DELETE | READ_CONTROL | WRITE_DAC \
+ | WRITE_OWNER | SYNCHRONIZE)
+#define SET_FILE_WRITE_RIGHTS (FILE_WRITE_DATA | FILE_APPEND_DATA \
+ | FILE_READ_EA | FILE_WRITE_EA \
+ | FILE_DELETE_CHILD | FILE_READ_ATTRIBUTES \
+ | FILE_WRITE_ATTRIBUTES \
+ | DELETE | READ_CONTROL | WRITE_DAC \
+ | WRITE_OWNER | SYNCHRONIZE)
+#define SET_FILE_EXEC_RIGHTS (FILE_READ_EA | FILE_WRITE_EA | FILE_EXECUTE \
+ | FILE_READ_ATTRIBUTES \
+ | FILE_WRITE_ATTRIBUTES \
+ | DELETE | READ_CONTROL | WRITE_DAC \
+ | WRITE_OWNER | SYNCHRONIZE)
+
/*
* Invalid readdir handle
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 88c02ac..1ffe255 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -96,6 +96,8 @@
const unsigned char *search_path,
struct super_block *sb, int xid);
extern void acl_to_uid_mode(struct inode *inode, const char *search_path);
+extern int mode_to_acl(struct inode *inode, const char *path);
+
extern int cifs_mount(struct super_block *, struct cifs_sb_info *, char *,
const char *);
extern int cifs_umount(struct super_block *, struct cifs_sb_info *);
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 9be0bbd..7d907e8 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -289,7 +289,7 @@
#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
-static int get_sfu_uid_mode(struct inode *inode,
+static int get_sfu_mode(struct inode *inode,
const unsigned char *path,
struct cifs_sb_info *cifs_sb, int xid)
{
@@ -528,16 +528,15 @@
/* BB fill in uid and gid here? with help from winbind?
or retrieve from NTFS stream extended attribute */
#ifdef CONFIG_CIFS_EXPERIMENTAL
+ /* fill in 0777 bits from ACL */
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
cFYI(1, ("Getting mode bits from ACL"));
acl_to_uid_mode(inode, search_path);
}
#endif
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
- /* fill in uid, gid, mode from server ACL */
- /* BB FIXME this should also take into account the
- * default uid specified on mount if present */
- get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
+ /* fill in remaining high mode bits e.g. SUID, VTX */
+ get_sfu_mode(inode, search_path, cifs_sb, xid);
} else if (atomic_read(&cifsInfo->inUse) == 0) {
inode->i_uid = cifs_sb->mnt_uid;
inode->i_gid = cifs_sb->mnt_gid;