spin off cifs_setattr with unix extensions to its own function
Jeff Layton [Sat, 2 Aug 2008 11:26:12 +0000 (07:26 -0400)]
Create a new cifs_setattr_unix function to handle a setattr when unix
extensions are enabled and have cifs_setattr call it. Also, clean up
variable declarations in cifs_setattr.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/inode.c

index 6d91189..f68d1ab 100644 (file)
@@ -1504,30 +1504,138 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs,
        return rc;
 }
 
+static int
+cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
+{
+       int rc;
+       int xid;
+       char *full_path = NULL;
+       struct inode *inode = direntry->d_inode;
+       struct cifsInodeInfo *cifsInode = CIFS_I(inode);
+       struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+       struct cifsTconInfo *pTcon = cifs_sb->tcon;
+       struct cifs_unix_set_info_args *args = NULL;
+
+       cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x",
+                direntry->d_name.name, attrs->ia_valid));
+
+       xid = GetXid();
+
+       if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
+               /* check if we have permission to change attrs */
+               rc = inode_change_ok(inode, attrs);
+               if (rc < 0)
+                       goto out;
+               else
+                       rc = 0;
+       }
+
+       full_path = build_path_from_dentry(direntry);
+       if (full_path == NULL) {
+               rc = -ENOMEM;
+               goto out;
+       }
+
+       if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
+               /*
+                  Flush data before changing file size or changing the last
+                  write time of the file on the server. If the
+                  flush returns error, store it to report later and continue.
+                  BB: This should be smarter. Why bother flushing pages that
+                  will be truncated anyway? Also, should we error out here if
+                  the flush returns error?
+                */
+               rc = filemap_write_and_wait(inode->i_mapping);
+               if (rc != 0) {
+                       cifsInode->write_behind_rc = rc;
+                       rc = 0;
+               }
+       }
+
+       if (attrs->ia_valid & ATTR_SIZE) {
+               rc = cifs_set_file_size(inode, attrs, xid, full_path);
+               if (rc != 0)
+                       goto out;
+       }
+
+       /* skip mode change if it's just for clearing setuid/setgid */
+       if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
+               attrs->ia_valid &= ~ATTR_MODE;
+
+       args = kmalloc(sizeof(*args), GFP_KERNEL);
+       if (args == NULL) {
+               rc = -ENOMEM;
+               goto out;
+       }
+
+       /* set up the struct */
+       if (attrs->ia_valid & ATTR_MODE)
+               args->mode = attrs->ia_mode;
+       else
+               args->mode = NO_CHANGE_64;
+
+       if (attrs->ia_valid & ATTR_UID)
+               args->uid = attrs->ia_uid;
+       else
+               args->uid = NO_CHANGE_64;
+
+       if (attrs->ia_valid & ATTR_GID)
+               args->gid = attrs->ia_gid;
+       else
+               args->gid = NO_CHANGE_64;
+
+       if (attrs->ia_valid & ATTR_ATIME)
+               args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
+       else
+               args->atime = NO_CHANGE_64;
+
+       if (attrs->ia_valid & ATTR_MTIME)
+               args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
+       else
+               args->mtime = NO_CHANGE_64;
+
+       if (attrs->ia_valid & ATTR_CTIME)
+               args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
+       else
+               args->ctime = NO_CHANGE_64;
+
+       args->device = 0;
+       rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args,
+                               cifs_sb->local_nls,
+                               cifs_sb->mnt_cifs_flags &
+                               CIFS_MOUNT_MAP_SPECIAL_CHR);
+
+       if (!rc)
+               rc = inode_setattr(inode, attrs);
+out:
+       kfree(args);
+       kfree(full_path);
+       FreeXid(xid);
+       return rc;
+}
+
 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
 {
        int xid;
-       struct cifs_sb_info *cifs_sb;
-       struct cifsTconInfo *pTcon;
+       struct inode *inode = direntry->d_inode;
+       struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+       struct cifsTconInfo *pTcon = cifs_sb->tcon;
+       struct cifsInodeInfo *cifsInode = CIFS_I(inode);
        char *full_path = NULL;
        int rc = -EACCES;
        FILE_BASIC_INFO time_buf;
        bool set_time = false;
        bool set_dosattr = false;
        __u64 mode = NO_CHANGE_64;
-       __u64 uid = NO_CHANGE_64;
-       __u64 gid = NO_CHANGE_64;
-       struct cifsInodeInfo *cifsInode;
-       struct inode *inode = direntry->d_inode;
+
+       if (pTcon->unix_ext)
+               return cifs_setattr_unix(direntry, attrs);
 
        xid = GetXid();
 
        cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
                 direntry->d_name.name, attrs->ia_valid));
 
-       cifs_sb = CIFS_SB(inode->i_sb);
-       pTcon = cifs_sb->tcon;
-
        if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
                /* check if we have permission to change attrs */
                rc = inode_change_ok(inode, attrs);
@@ -1543,7 +1651,6 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
                FreeXid(xid);
                return -ENOMEM;
        }
-       cifsInode = CIFS_I(inode);
 
        if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
                /*
@@ -1574,19 +1681,8 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
         * CIFSACL support + proper Windows to Unix idmapping, we may be
         * able to support this in the future.
         */
-       if (!pTcon->unix_ext &&
-           !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) {
+       if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
                attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
-       } else {
-               if (attrs->ia_valid & ATTR_UID) {
-                       cFYI(1, ("UID changed to %d", attrs->ia_uid));
-                       uid = attrs->ia_uid;
-               }
-               if (attrs->ia_valid & ATTR_GID) {
-                       cFYI(1, ("GID changed to %d", attrs->ia_gid));
-                       gid = attrs->ia_gid;
-               }
-       }
 
        time_buf.Attributes = 0;
 
@@ -1599,22 +1695,7 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
                mode = attrs->ia_mode;
        }
 
-       if ((pTcon->unix_ext)
-           && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID))) {
-               struct cifs_unix_set_info_args args = {
-                       .mode   = mode,
-                       .uid    = uid,
-                       .gid    = gid,
-                       .ctime  = NO_CHANGE_64,
-                       .atime  = NO_CHANGE_64,
-                       .mtime  = NO_CHANGE_64,
-                       .device = 0,
-               };
-               rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
-                                       cifs_sb->local_nls,
-                                       cifs_sb->mnt_cifs_flags &
-                                               CIFS_MOUNT_MAP_SPECIAL_CHR);
-       } else if (attrs->ia_valid & ATTR_MODE) {
+       if (attrs->ia_valid & ATTR_MODE) {
                rc = 0;
 #ifdef CONFIG_CIFS_EXPERIMENTAL
                if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)