On Mon, May 11, 2009 at 04:24:22PM -0400, Jeff Layton wrote:
> We'll need this later when we restructure cifs_get_inode_info.
>
> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
> ---
> fs/cifs/cifsacl.c | 25 ++++++-------------------
> 1 files changed, 6 insertions(+), 19 deletions(-)
>
> static struct cifs_ntsd *get_cifs_acl(u32 *pacllen, struct inode *inode,
> - const char *path, const __u16 *pfid)
> + const char *path, const __u16 *pfid)
> {
> struct cifsFileInfo *open_file = NULL;
> - bool unlock_file = false;
> int xid;
> int rc = -EIO;
> __u16 fid;
> - struct super_block *sb;
> - struct cifs_sb_info *cifs_sb;
> struct cifs_ntsd *pntsd = NULL;
> + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
This isn't going to work with a NULL inode.
But this whole set_cifs_acl function is a real mess anyway and needs
some splitting up. What about the untested patch below?
Index: linux-2.6/fs/cifs/cifsacl.c
===================================================================
--- linux-2.6.orig/fs/cifs/cifsacl.c 2009-05-11 22:35:29.841784452 +0200
+++ linux-2.6/fs/cifs/cifsacl.c 2009-05-11 22:55:19.465660251 +0200
@@ -552,67 +552,65 @@ static int build_sec_desc(struct cifs_nt
return rc;
}
-
-/* Retrieve an ACL from the server */
-static struct cifs_ntsd *get_cifs_acl(u32 *pacllen, struct inode *inode,
- const char *path, const __u16 *pfid)
+static struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb,
+ __u16 fid, u32 *pacllen)
{
- struct cifsFileInfo *open_file = NULL;
- bool unlock_file = false;
- int xid;
- int rc = -EIO;
- __u16 fid;
- struct super_block *sb;
- struct cifs_sb_info *cifs_sb;
struct cifs_ntsd *pntsd = NULL;
+ int xid, rc;
- cFYI(1, ("get mode from ACL for %s", path));
+ xid = GetXid();
+ rc = CIFSSMBGetCIFSACL(xid, cifs_sb->tcon, fid, &pntsd, pacllen);
+ FreeXid(xid);
- if (inode == NULL)
- return NULL;
- xid = GetXid();
- if (pfid == NULL)
- open_file = find_readable_file(CIFS_I(inode));
- else
- fid = *pfid;
+ cFYI(1, ("GetCIFSACL rc = %d ACL len %d", rc, *pacllen));
+ return pntsd;
+}
- sb = inode->i_sb;
- if (sb == NULL) {
- FreeXid(xid);
- return NULL;
- }
- cifs_sb = CIFS_SB(sb);
+static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb,
+ const char *path, u32 *pacllen)
+{
+ struct cifs_ntsd *pntsd = NULL;
+ int oplock = 0;
+ int xid, rc;
+ __u16 fid;
- if (open_file) {
- unlock_file = true;
- fid = open_file->netfid;
- } else if (pfid == NULL) {
- int oplock = 0;
- /* open file */
- rc = CIFSSMBOpen(xid, cifs_sb->tcon, path, FILE_OPEN,
- READ_CONTROL, 0, &fid, &oplock, NULL,
- cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
- if (rc != 0) {
- cERROR(1, ("Unable to open file to get ACL"));
- FreeXid(xid);
- return NULL;
- }
+ xid = GetXid();
+
+ rc = CIFSSMBOpen(xid, cifs_sb->tcon, path, FILE_OPEN, READ_CONTROL, 0,
+ &fid, &oplock, NULL, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (rc) {
+ cERROR(1, ("Unable to open file to get ACL"));
+ goto out;
}
rc = CIFSSMBGetCIFSACL(xid, cifs_sb->tcon, fid, &pntsd, pacllen);
cFYI(1, ("GetCIFSACL rc = %d ACL len %d", rc, *pacllen));
- if (unlock_file == true) /* find_readable_file increments ref count */
- atomic_dec(&open_file->wrtPending);
- else if (pfid == NULL) /* if opened above we have to close the handle */
- CIFSSMBClose(xid, cifs_sb->tcon, fid);
- /* else handle was passed in by caller */
+ CIFSSMBClose(xid, cifs_sb->tcon, fid);
+ out:
FreeXid(xid);
return pntsd;
}
+/* Retrieve an ACL from the server */
+static struct cifs_ntsd *get_cifs_acl(u32 *pacllen, struct inode *inode,
+ const char *path)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ struct cifs_ntsd *pntsd = NULL;
+ struct cifsFileInfo *open_file;
+
+ open_file = find_readable_file(CIFS_I(inode));
+ if (!open_file)
+ return get_cifs_acl_by_path(cifs_sb, path, pacllen);
+
+ pntsd = get_cifs_acl_by_fid(cifs_sb, open_file->netfid, pacllen);
+ atomic_dec(&open_file->wrtPending);
+ return pntsd;
+}
+
/* Set an ACL on the server */
static int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
struct inode *inode, const char *path)
@@ -675,7 +673,13 @@ void acl_to_uid_mode(struct inode *inode
int rc = 0;
cFYI(DBG2, ("converting ACL to mode for %s", path));
- pntsd = get_cifs_acl(&acllen, inode, path, pfid);
+
+ if (pfid) {
+ pntsd = get_cifs_acl_by_fid(CIFS_SB(inode->i_sb), *pfid,
+ &acllen);
+ } else {
+ pntsd = get_cifs_acl(&acllen, inode, path);
+ }
/* if we can retrieve the ACL, now parse Access Control Entries, ACEs */
if (pntsd)
@@ -698,7 +702,7 @@ int mode_to_acl(struct inode *inode, con
cFYI(DBG2, ("set ACL from mode for %s", path));
/* Get the security descriptor */
- pntsd = get_cifs_acl(&secdesclen, inode, path, NULL);
+ pntsd = get_cifs_acl(&secdesclen, inode, path);
/* Add three ACEs for owner, group, everyone getting rid of
other ACEs as chmod disables ACEs and set the security descriptor */
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
