[CIFS] break ATTR_SIZE changes out into their own function

Move the code that handles ATTR_SIZE changes to its own function. This
makes for a smaller function and reduces the level of indentation.

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

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 2e904bd..46e54d3 100644 (file)
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1413,6 +1413,82 @@ out_busy:
        return -ETXTBSY;
 }
 
+static int
+cifs_set_file_size(struct inode *inode, struct iattr *attrs,
+                  int xid, char *full_path)
+{
+       int rc;
+       struct cifsFileInfo *open_file;
+       struct cifsInodeInfo *cifsInode = CIFS_I(inode);
+       struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+       struct cifsTconInfo *pTcon = cifs_sb->tcon;
+
+       /*
+        * To avoid spurious oplock breaks from server, in the case of
+        * inodes that we already have open, avoid doing path based
+        * setting of file size if we can do it by handle.
+        * This keeps our caching token (oplock) and avoids timeouts
+        * when the local oplock break takes longer to flush
+        * writebehind data than the SMB timeout for the SetPathInfo
+        * request would allow
+        */
+       open_file = find_writable_file(cifsInode);
+       if (open_file) {
+               __u16 nfid = open_file->netfid;
+               __u32 npid = open_file->pid;
+               rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
+                                       npid, false);
+               atomic_dec(&open_file->wrtPending);
+               cFYI(1, ("SetFSize for attrs rc = %d", rc));
+               if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
+                       unsigned int bytes_written;
+                       rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
+                                         &bytes_written, NULL, NULL, 1);
+                       cFYI(1, ("Wrt seteof rc %d", rc));
+               }
+       } else
+               rc = -EINVAL;
+
+       if (rc != 0) {
+               /* Set file size by pathname rather than by handle
+                  either because no valid, writeable file handle for
+                  it was found or because there was an error setting
+                  it by handle */
+               rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
+                                  false, cifs_sb->local_nls,
+                                  cifs_sb->mnt_cifs_flags &
+                                       CIFS_MOUNT_MAP_SPECIAL_CHR);
+               cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
+               if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
+                       __u16 netfid;
+                       int oplock = 0;
+
+                       rc = SMBLegacyOpen(xid, pTcon, full_path,
+                               FILE_OPEN, GENERIC_WRITE,
+                               CREATE_NOT_DIR, &netfid, &oplock, NULL,
+                               cifs_sb->local_nls,
+                               cifs_sb->mnt_cifs_flags &
+                                       CIFS_MOUNT_MAP_SPECIAL_CHR);
+                       if (rc == 0) {
+                               unsigned int bytes_written;
+                               rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
+                                                 attrs->ia_size,
+                                                 &bytes_written, NULL,
+                                                 NULL, 1);
+                               cFYI(1, ("wrt seteof rc %d", rc));
+                               CIFSSMBClose(xid, pTcon, netfid);
+                       }
+               }
+       }
+
+       if (rc == 0) {
+               rc = cifs_vmtruncate(inode, attrs->ia_size);
+               cifs_truncate_page(inode->i_mapping, inode->i_size);
+       }
+
+       return rc;
+}
+
 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
 {
        int xid;
@@ -1420,7 +1496,6 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
        struct cifsTconInfo *pTcon;
        char *full_path = NULL;
        int rc = -EACCES;
-       struct cifsFileInfo *open_file = NULL;
        FILE_BASIC_INFO time_buf;
        bool set_time = false;
        bool set_dosattr = false;
@@ -1472,78 +1547,8 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
        }
 
        if (attrs->ia_valid & ATTR_SIZE) {
-               /* To avoid spurious oplock breaks from server, in the case of
-                  inodes that we already have open, avoid doing path based
-                  setting of file size if we can do it by handle.
-                  This keeps our caching token (oplock) and avoids timeouts
-                  when the local oplock break takes longer to flush
-                  writebehind data than the SMB timeout for the SetPathInfo
-                  request would allow */
-
-               open_file = find_writable_file(cifsInode);
-               if (open_file) {
-                       __u16 nfid = open_file->netfid;
-                       __u32 npid = open_file->pid;
-                       rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
-                                               nfid, npid, false);
-                       atomic_dec(&open_file->wrtPending);
-                       cFYI(1, ("SetFSize for attrs rc = %d", rc));
-                       if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
-                               unsigned int bytes_written;
-                               rc = CIFSSMBWrite(xid, pTcon,
-                                                 nfid, 0, attrs->ia_size,
-                                                 &bytes_written, NULL, NULL,
-                                                 1 /* 45 seconds */);
-                               cFYI(1, ("Wrt seteof rc %d", rc));
-                       }
-               } else
-                       rc = -EINVAL;
-
-               if (rc != 0) {
-                       /* Set file size by pathname rather than by handle
-                          either because no valid, writeable file handle for
-                          it was found or because there was an error setting
-                          it by handle */
-                       rc = CIFSSMBSetEOF(xid, pTcon, full_path,
-                                          attrs->ia_size, false,
-                                          cifs_sb->local_nls,
-                                          cifs_sb->mnt_cifs_flags &
-                                               CIFS_MOUNT_MAP_SPECIAL_CHR);
-                       cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
-                       if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
-                               __u16 netfid;
-                               int oplock = 0;
-
-                               rc = SMBLegacyOpen(xid, pTcon, full_path,
-                                       FILE_OPEN, GENERIC_WRITE,
-                                       CREATE_NOT_DIR, &netfid, &oplock,
-                                       NULL, cifs_sb->local_nls,
-                                       cifs_sb->mnt_cifs_flags &
-                                               CIFS_MOUNT_MAP_SPECIAL_CHR);
-                               if (rc == 0) {
-                                       unsigned int bytes_written;
-                                       rc = CIFSSMBWrite(xid, pTcon,
-                                                       netfid, 0,
-                                                       attrs->ia_size,
-                                                       &bytes_written, NULL,
-                                                       NULL, 1 /* 45 sec */);
-                                       cFYI(1, ("wrt seteof rc %d", rc));
-                                       CIFSSMBClose(xid, pTcon, netfid);
-                               }
-
-                       }
-               }
-
-               /* Server is ok setting allocation size implicitly - no need
-                  to call:
-               CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, true,
-                        cifs_sb->local_nls);
-                  */
-
-               if (rc == 0) {
-                       rc = cifs_vmtruncate(inode, attrs->ia_size);
-                       cifs_truncate_page(inode->i_mapping, inode->i_size);
-               } else
+               rc = cifs_set_file_size(inode, attrs, xid, full_path);
+               if (rc != 0)
                        goto cifs_setattr_exit;
        }